A practical guide for business owners, plant managers, facility leaders, and environmental compliance teams For many business owners and plant managers, the hardest part of environmental compliance is not wanting to follow the rules—it is figuring out which rules apply, which agency has authority, and whether one approval actually covers the whole project. In California, a boiler, storm drain, waste drum, generator, pesticide, X-ray device, or simple tenant improvement can each point to a different regulator.
Why California Has Multiple Environmental Agencies
California’s environmental system can feel complicated because it is organized by environmental pathway, not by one master permit. Air emissions, water discharges, hazardous materials, hazardous waste, solid waste, pesticides, toxic exposure, contaminated property, radiation devices, construction, and emergency releases may each involve different regulators. A single facility can touch several of these areas at once, which is why more than one agency may have authority over the same site, process, project, or incident. CalEPA is the statewide umbrella agency for many environmental programs, but it does not replace the specialized agencies below. Its role is coordination; the boards, departments, local districts, and local agencies still issue permits, conduct inspections, and enforce program-specific rules.
Acronyms Used in This Article
Environmental compliance writing uses many agency names and program acronyms. The table below gives readers a quick reference before they reach the more detailed sections.
| Acronym | What It Stands For | Plain-Language Meaning |
| AQMD | Air Quality Management District | Regional air agency that usually permits and inspects stationary equipment that emits air contaminants. |
| APCD | Air Pollution Control District | Another name for a local or regional air district, often used in counties or regions outside AQMD areas. |
| CARB | California Air Resources Board | State air agency responsible for statewide air programs, mobile sources, fuels, climate programs, and many fleet rules. |
| CalEPA | California Environmental Protection Agency | Umbrella agency that coordinates several California environmental boards, departments, and offices. |
| CUPA | Certified Unified Program Agency | Local agency that administers hazardous materials, hazardous waste generator, tank, and emergency-response programs. |
| CERS | California Environmental Reporting System | Electronic reporting system commonly used for hazardous materials business plans, chemical inventories, and CUPA submissions. |
| DTSC | Department of Toxic Substances Control | California agency focused on hazardous waste, toxic substances, contaminated property, and cleanup oversight. |
| RCRA | Resource Conservation and Recovery Act | Federal hazardous waste law that underlies many hazardous waste terms, systems, and requirements. |
| EPA | U.S. Environmental Protection Agency | Federal environmental agency responsible for national environmental laws and oversight. |
| DPR | Department of Pesticide Regulation | California agency that regulates pesticide registration, sale, licensing, and use. |
| OEHHA | Office of Environmental Health Hazard Assessment | California office that evaluates chemical health risks and supports Proposition 65 and other health-risk standards. |
| CDPH-RHB | California Department of Public Health Radiologic Health Branch | Public health branch that regulates radiation machines, X-ray equipment, radioactive materials, and radiation safety programs. |
| CDFW | California Department of Fish and Wildlife | Agency involved in streambed alteration, wildlife impacts, habitat protection, and some spill-response programs. |
| OSPR | Office of Spill Prevention and Response | CDFW program focused on oil spill prevention, preparedness, and response. |
| Cal OES | California Governor’s Office of Emergency Services | State emergency agency that operates the State Warning Center for certain hazardous materials, oil, and radioactive-material release notifications. |
| BCDC | San Francisco Bay Conservation and Development Commission | Regional agency that regulates certain Bay fill, shoreline, marsh, and San Francisco Bay development activities. |
| USACE | U.S. Army Corps of Engineers | Federal agency that may permit work affecting wetlands, waters of the United States, and navigable waters. |
| USCG | U.S. Coast Guard | Federal agency involved in maritime safety, ports, navigable waters, oil transfer operations, and certain waterfront facilities. |
| NPDES | National Pollutant Discharge Elimination System | Clean Water Act permit program for discharges to surface waters and certain stormwater discharges. |
| SMARTS | Stormwater Multiple Application and Report Tracking System | Water Board system used for stormwater permit enrollment, reports, and stormwater compliance documents. |
| CIWQS | California Integrated Water Quality System | Water Board system used for permit, monitoring, violation, inspection, and enforcement data. |
| SWIS | Solid Waste Information System | CalRecycle system containing information about solid waste facilities and related records. |
| RDRS | Recycling and Disposal Reporting System | CalRecycle reporting system for recycling, disposal, and waste-flow information. |
| EPIMS | Environmental Permit Information Management System | CDFW system used for Lake and Streambed Alteration Agreement notifications and related permitting documents. |
| OSCAR | Online System for Customer Applications and Records | State Lands Commission system for inquiries and applications involving state lands leases or permits. |
| PERP | Portable Equipment Registration Program | CARB program for certain portable engines and equipment that operate at multiple locations. |
| DOORS | Diesel Off-Road Online Reporting System | CARB system used for reporting certain off-road diesel vehicle and equipment information. |
| TRUCRS | Truck Regulation Upload, Compliance, and Reporting System | CARB system used for certain truck and bus compliance reporting. |
| CTC-VIS | Clean Truck Check Vehicle Inspection System | CARB system associated with heavy-duty vehicle emissions compliance reporting. |
| ACTRS | Advanced Clean Trucks Reporting System | CARB reporting system associated with advanced clean truck program requirements. |
The Big Picture: One Facility, Many Environmental Pathways
The easiest way to understand the system is to follow the pathway. Air points to CARB and the local AQMD/APCD. Water points to the State or Regional Water Boards and sometimes a local sanitation district. Hazardous materials point to the CUPA. Hazardous waste and contaminated sites point to DTSC. Solid waste and recycling point to CalRecycle. Pesticides point to DPR and county agricultural commissioners. Chemical exposure science points to OEHHA. Radiation-producing equipment and radioactive materials point to CDPH-RHB. Construction, waterways, coastlines, ports, fire code, and emergency releases can bring in additional local, state, or federal agencies.
Major California Environmental Agencies and What They Do
California Environmental Protection Agency (CalEPA)
CalEPA is the coordinating agency. It oversees and coordinates the work of its boards, departments, and office, including agencies focused on air, water, pesticides, recycling, toxic substances, and environmental health risk. For businesses, CalEPA is important because it helps align enforcement and compliance priorities when a problem crosses agency lines.
California Air Resources Board (CARB), AQMDs, and APCDs: The Air Side of Compliance
Air regulation is confusing because California splits responsibility between CARB and local air districts. CARB handles statewide programs such as climate pollution, mobile sources, fuels, diesel fleets, refrigerants, portable equipment, and greenhouse-gas rules. Local air districts—AQMDs or APCDs—usually permit and inspect stationary equipment at facilities, including boilers, generators, engines, coating lines, ovens, spray booths, dust collectors, tanks, printing presses, and process equipment. A facility may therefore report to CARB for statewide fleet or engine rules while also needing a local air permit for equipment at the site.
What “AQMD” Means
An AQMD is a regional air agency. In Southern California, South Coast AQMD covers most of Los Angeles, Orange, Riverside, and San Bernardino Counties. Other regions have districts such as Bay Area AQMD, Sacramento Metropolitan AQMD, San Joaquin Valley APCD, San Diego County APCD, Mojave Desert AQMD, and county APCDs. The local district is usually where businesses go for air permits, equipment changes, source testing, annual emissions reporting, notices of violation, nuisance complaints, and local rule interpretation.
Why Air District Rules Differ by Region
Air district rules differ because air quality problems differ by region. A rule, exemption, threshold, or permit condition that works in one county may not apply in another. This is why copying a compliance approach from a sister facility in a different district can be risky.
Common Air District Triggers Businesses Miss
- Installing, replacing, relocating, or modifying equipment that emits air contaminants.
- Changing production rates, operating hours, materials, coatings, solvents, fuels, or control devices.
- Adding an emergency generator, boiler, engine, oven, furnace, paint booth, dust collector, or thermal oxidizer.
- Changing ownership or moving permitted equipment to a different address.
- Generating odors, visible emissions, dust, smoke, or nuisance complaints.
- Using toxic air contaminants that may trigger health-risk analysis, public notice, or additional permit conditions.
State Water Resources Control Board and Regional Water Boards
The State Water Resources Control Board and nine Regional Water Boards regulate water quality, wastewater, stormwater, groundwater, surface water, water rights, drinking water protection, underground storage tank issues, and cleanup activities. Businesses commonly encounter the Water Boards through industrial stormwater coverage, process-water discharges, wastewater systems, outdoor material storage, spills, and contaminated property.
Department of Toxic Substances Control (DTSC)
DTSC regulates hazardous waste and toxic substances, including hazardous waste generators, transporters, treatment operations, certain recyclers, and cleanup of contaminated properties. DTSC may also be involved when chemical products, wastes, or contaminated sites pose long-term risk. For plant managers, DTSC issues often arise from hazardous waste accumulation, labeling, manifests, treatment authorization, waste classification, generator status, land disposal restrictions, and corrective action. RCRA connection. RCRA is the federal hazardous waste framework behind many familiar terms, including EPA ID numbers, generator status, manifests, e-Manifest, RCRAInfo, accumulation rules, treatment standards, land disposal restrictions, and corrective action. DTSC implements much of California’s hazardous waste program, and California’s rules can be more stringent than the federal baseline.
Department of Resources Recycling and Recovery (CalRecycle)
CalRecycle focuses on solid waste, recycling, organics, landfill diversion, waste reduction, and certain product stewardship programs. Businesses may encounter CalRecycle requirements through waste hauling, recycling programs, organics diversion, landfill restrictions, local solid waste ordinances, or facility operations involving recovered materials. CalRecycle’s work can overlap with DTSC when a material is both recyclable and potentially hazardous, because the same item may raise questions about whether it is a waste, a hazardous waste, a recyclable material, or a regulated product.
Department of Pesticide Regulation (DPR)
DPR regulates pesticide registration, sale, use, licensing, worker protection, and pesticide risk reduction. It is especially relevant to agriculture, food processing, pest control businesses, warehouses, landscaping operations, structural pest control, and facilities that apply or store pesticide products. County agricultural commissioners often implement pesticide rules locally, which means businesses may deal with both state rules and county-level oversight.
Office of Environmental Health Hazard Assessment (OEHHA)
OEHHA is not usually the agency that inspects a plant or issues a facility permit. Its main role is scientific: evaluating health risks from chemicals and supporting environmental health standards. OEHHA is closely associated with Proposition 65 because it evaluates and maintains the list of chemicals known to cause cancer or reproductive toxicity and develops safe harbor exposure levels. Businesses may feel OEHHA’s impact through warning obligations, risk assessments, product labeling decisions, and agency standards that rely on OEHHA’s scientific evaluations.
California Department of Public Health Radiologic Health Branch (CDPH-RHB)
CDPH-RHB regulates many activities involving ionizing radiation, including X-ray machines, radiation-producing equipment, radioactive materials, industrial radiography, gauges, analytical devices, and generally licensed radioactive devices. It is easy to miss because it sits within public health rather than CalEPA, but it can matter for medical, dental, veterinary, laboratory, manufacturing, construction testing, security-screening, research, and quality-control operations.
Why Responsibilities Overlap
Overlap happens because real-world activities rarely stay in one category. A solvent may evaporate into the air, spill onto soil, enter a storm drain, become hazardous waste, create worker-safety issues, and raise community exposure questions. Each agency asks a different legal question, so one approval rarely cancels another agency’s authority.
Common Overlap Examples for Businesses
| Business Situation | Agencies That May Be Involved | Why the Overlap Happens |
| Industrial coating, painting, printing, solvent cleaning, or adhesive use | Local AQMD/APCD, CARB, DTSC, Water Boards, CUPA | The local air district may regulate VOCs, toxics, permits, and control devices. DTSC may regulate spent solvent or contaminated wipes as hazardous waste. Water Boards may regulate washwater or stormwater exposure. CUPA may regulate chemical storage and emergency reporting. |
| Emergency generator, boiler, engine, oven, furnace, or thermal oxidizer | Local AQMD/APCD, CARB, CUPA, local fire agency | The air district may require permits, source testing, operating limits, and recordkeeping. CARB may regulate diesel engines, fuels, or statewide air toxic measures. CUPA or the fire agency may regulate fuel tanks, hazardous materials storage, and emergency response planning. |
| Outdoor storage of raw materials, scrap, drums, pallets, powders, byproducts, or waste containers | Water Boards, CUPA, DTSC, CalRecycle, local AQMD/APCD, local fire agency | Stormwater contact can trigger industrial stormwater duties. Dust or odors may trigger air district rules. Hazardous materials storage may require local reporting. Discarded materials may be solid waste, hazardous waste, recyclable material, or universal waste depending on use and condition. |
| Diesel trucks, yard tractors, forklifts, transport refrigeration units, generators, or boilers | CARB, local AQMD/APCD, CUPA, EPA in some cases | CARB may regulate fleets, engines, fuels, and mobile sources. Local districts may regulate stationary equipment and, in some regions, facility-based mobile source measures. Fuel storage and spill planning may involve CUPA programs. |
| Contaminated soil or groundwater discovered during construction, redevelopment, or property sale | Water Boards, DTSC, local agencies, CalEPA coordination in complex cases | Groundwater and surface water risk may fall under Water Boards. Toxic substances and cleanup oversight may involve DTSC. Local agencies may manage grading permits, fire hazards, vapor intrusion concerns, or emergency conditions. |
| Wastewater treatment, process drains, sewer discharge, or washdown areas | Regional Water Board, local sanitation district, CUPA, DTSC, local AQMD/APCD | Discharges may be regulated under water-quality permits or sewer ordinances. Sludges and filters may be hazardous waste. Chemical storage may be regulated locally. Odors or air emissions from tanks or treatment units may involve the air district. |
| Recycling, scrap handling, battery storage, electronics, oil, filters, aerosol cans, lamps, or universal waste | CalRecycle, DTSC, CUPA, local solid waste agency, local fire agency | Materials promoted as recyclable can still be regulated if they are discarded, contaminated, hazardous, or mismanaged. The business must determine whether the material is a product, recyclable commodity, solid waste, hazardous waste, or universal waste. |
| Pesticide storage or application at a facility, farm, warehouse, food processor, or landscape operation | DPR, county agricultural commissioner, Water Boards, CUPA, local AQMD/APCD | DPR and counties regulate pesticide use and licensing. Runoff or spills may involve Water Boards. Storage may involve CUPA. Fumigants, odors, or airborne releases may involve the air district. |
The Role of Local Agencies and CUPAs
CUPAs administer several local hazardous materials and emergency-response programs, including hazardous materials business plans, underground storage tanks, aboveground petroleum storage, accidental release prevention, and hazardous waste generator programs. This is why a business may be inspected by county environmental health, a city fire department, a local air district, a Regional Water Board, or a state agency depending on the issue.
Why CUPA Is Often the First Local Regulator a Business Meets
CUPA approval does not automatically satisfy DTSC, Water Board, AQMD/APCD, fire code, Cal/OSHA, or building permit requirements. A CUPA inspection may feel comprehensive, but it usually covers only the Unified Program obligations assigned to that local agency.
Other Agencies Companies Should Not Overlook
The agencies above are the most common environmental regulators for many facilities, but they are not the only ones. Depending on the location, equipment, construction activity, waterfront access, emergency incident, or worker exposure issue, a company may need to coordinate with additional state, local, regional, or federal agencies. These agencies are often missed because they are not always labeled as “environmental” agencies, even though their approvals can stop or delay a project.
| Agency or Program | When It Matters | Why Companies Miss It |
| Cal/OSHA | Chemical exposure, hazardous materials handling, confined spaces, emergency response, personal protective equipment, heat illness, noise, respirators, injury prevention, hazardous communication, and employee training. | Cal/OSHA is not an environmental permitting agency, but chemical and emergency-response issues often overlap with environmental compliance. A facility can satisfy an environmental rule while still failing a worker-safety requirement. |
| Cal OES State Warning Center | Significant or threatened releases of hazardous materials, oil, or radioactive materials; emergency notifications; hazardous materials incident coordination; and spill reporting. | Businesses often focus on calling 911 or the CUPA and forget that certain releases require immediate notification to the State Warning Center as well. |
| Local Fire Department or Fire Prevention Bureau | Flammable liquids, combustible storage, compressed gases, lithium battery storage, hazardous occupancy, high-piled storage, emergency access, fire suppression, hot work, tanks, and hazardous materials storage. | Fire departments may regulate the same chemicals and tanks that appear in CERS, but from a fire-code and life-safety perspective rather than an environmental-reporting perspective. |
| Local Building, Planning, Zoning, and Public Works Departments | Tenant improvements, equipment anchoring, grading, demolition, construction, drainage changes, business licenses, conditional use permits, occupancy classifications, and encroachment permits. | Companies sometimes obtain environmental approval for equipment but miss local construction, zoning, or occupancy approvals needed before installation or operation. |
| Local Sanitation District or Publicly Owned Treatment Works | Industrial wastewater discharges to sanitary sewer, pretreatment permits, pH limits, metals, organics, sampling, grease, washwater, batch discharges, and sewer connection approvals. | Sewer approval is often confused with Water Board approval. A discharge to sewer may be regulated locally even when it does not discharge directly to surface water. |
| County Agricultural Commissioner | Restricted material permits, pesticide-use reporting, operator identification numbers, field enforcement, agricultural pesticide incidents, fumigation notifications, and local pesticide rules. | DPR sets statewide pesticide requirements, but county agricultural commissioners often administer and enforce pesticide rules locally. |
| California Department of Fish and Wildlife (CDFW) | Streambed alteration, work in or near rivers, streams, lakes, washes, wetlands, riparian areas, habitat impacts, endangered species issues, and certain spill impacts on fish and wildlife resources. | Companies may think a drainage channel, dry wash, or seasonal creek is not regulated. CDFW may still require notification or a Lake and Streambed Alteration Agreement. |
| CDFW Office of Spill Prevention and Response (OSPR) | Oil spill prevention, oil spill contingency plans, regulated vessels, marine facilities, response certifications, drills, and oil spill preparedness. | Facilities near marine waters, ports, terminals, pipelines, or waterfront transfer operations may have oil-spill planning duties beyond ordinary hazardous materials reporting. |
| California Coastal Commission | Development in the coastal zone, shoreline construction, changes in land or water use, public access, coastal resources, coastal development permits, and appeals of local coastal approvals. | Coastal development is defined broadly. Even changes that do not look like traditional construction may need coastal review if they change the intensity of use in the coastal zone. |
| San Francisco Bay Conservation and Development Commission (BCDC) | Projects in San Francisco Bay, tidal areas, marshes, managed wetlands, Suisun Marsh, and the shoreline band around the Bay. | Bay-area businesses may remember city or county permits but miss BCDC’s regional permit authority for Bay fill, shoreline work, and certain activities near tidally influenced waters. |
| California State Lands Commission | Use of state-owned tide and submerged lands, navigable waterways, waterfront leases, docks, wharves, pipelines, offshore facilities, ports, and certain industrial uses on public trust lands. | A company may own or lease upland property but still need State Lands authorization if a structure, pipeline, dock, or facility crosses or occupies state-managed land or water. |
| U.S. Army Corps of Engineers | Discharge of dredged or fill material into waters of the United States, wetlands impacts, work in navigable waters, utility crossings, dredging, docks, and certain shoreline or channel work. | Federal permits may apply even when a project also has state or local water, coastal, CDFW, or building approvals. |
| U.S. Environmental Protection Agency | Federal environmental oversight, hazardous waste, Clean Water Act, Clean Air Act, oil spill prevention, facility response plans, federal enforcement, and certain cleanup or reporting programs. | California implements many programs, but federal law can still apply, especially for oil, hazardous waste, water, air, emergency planning, and federal enforcement issues. |
| U.S. Coast Guard | Marine transportation-related facilities, waterfront oil transfer, vessels, ports, marine safety, navigable waters, oil spill response planning, and certain maritime security issues. | Businesses near ports or navigable waters may focus on local and state permits while missing Coast Guard rules tied to vessels, waterfront facilities, and oil transfer operations. |
| Port Authorities and Airport Authorities | Facilities operating on port or airport property, fuel farms, cargo operations, marine terminals, aircraft support, stormwater, lease conditions, tenant standards, security, and infrastructure access. | Lease requirements and operational permits from a port or airport can be as important as agency permits, especially where the public agency owns or controls the site. |
| Flood Control Districts, Public Works Agencies, and Storm Drain Owners | Storm drain connections, flood channels, drainage changes, encroachments, outfalls, stormwater infrastructure, grading, roadways, and work near public rights-of-way. | A storm drain may look like ordinary infrastructure, but changing flow, connecting to it, or working near it may require separate approval from the owner or flood-control agency. |
This broader list does not mean every facility must contact every agency. It means companies should screen for location, activity, equipment, discharges, emergency risks, construction, waterway impacts, worker exposure, and property-control issues. The more a project touches land use, water, construction, wildlife habitat, ports, coastlines, public infrastructure, or emergency response, the more likely it is that a non-CalEPA agency will become important.
Which Agencies Issue Permits?
One of the biggest points of confusion is that California does not have one universal “environmental permit.” Permits are usually issued by the agency responsible for the specific environmental pathway or activity. A facility may need several permits or registrations at the same time because one operation can affect air, water, waste, hazardous materials, emergency response, and local land-use requirements.
| Permit or Approval Area | Typical Issuing or Administering Agency | What It Usually Covers |
| Air permits for stationary equipment | Local AQMD or APCD | Permits to construct, permits to operate, source testing, emission limits, control devices, toxic air contaminants, dust, odors, and nuisance rules for equipment at a facility. |
| Statewide air programs, fleets, mobile sources, fuels, refrigerants, and greenhouse-gas programs | CARB | Statewide compliance programs that may involve registration, reporting, fleet rules, engine standards, fuel requirements, and emissions documentation rather than a traditional facility permit. |
| Industrial stormwater, wastewater, groundwater, surface water, and cleanup-related water quality permits | State Water Resources Control Board and Regional Water Quality Control Boards | Discharge permits, stormwater coverage, waste discharge requirements, groundwater cleanup orders, water-quality monitoring, and surface-water protection. |
| Industrial sewer discharge or pretreatment | Local sanitation district or publicly owned treatment works | Limits and approvals for discharging process wastewater to the sanitary sewer, including sampling, pretreatment, pH, metals, organics, and local discharge standards. |
| Hazardous materials storage and emergency reporting | Local CUPA | Hazardous materials business plans, chemical inventories, site maps, emergency contacts, spill procedures, and local hazardous materials inspections. |
| Hazardous waste generator requirements and certain treatment activities | DTSC and/or local CUPA | Hazardous waste accumulation, labeling, manifests, generator status, treatment authorization, waste classification, inspections, and enforcement. |
| Underground storage tanks and aboveground petroleum storage program oversight | Local CUPA | Tank permits, monitoring, leak detection, spill prevention, inspection records, closure requirements, and emergency planning tied to fuel or petroleum storage. |
| Solid waste, recycling, organics, landfills, transfer stations, and some material recovery operations | CalRecycle and local enforcement agencies | Solid waste facility permits, recycling and organics program requirements, landfill diversion rules, local enforcement, and facility standards. |
| Pesticide use, sale, restricted materials, and agricultural or structural application | DPR and county agricultural commissioners | Pesticide registration, licensing, restricted material permits, use reporting, worker protection, storage practices, and county-level field enforcement. |
| Building, grading, fire, zoning, occupancy, and local construction approvals | City or county agencies | Local permits that may be required before equipment installation, tenant improvements, tanks, hazardous occupancy, construction, grading, or operational changes. |
| Radiation machines, X-ray devices, radioactive materials, industrial radiography, and generally licensed radioactive devices | CDPH Radiologic Health Branch | Radiation machine registration, radioactive materials licensing, inspections, radiation safety requirements, incident response, and facility obligations for regulated radiation-producing equipment or radioactive sources. |
| Coastal, Bay, wetlands, streambed, navigable water, waterfront, or public trust land approvals | California Coastal Commission, BCDC, CDFW, State Lands Commission, U.S. Army Corps of Engineers, U.S. Coast Guard, city/county agencies, or port authorities depending on location | Coastal development permits, BCDC permits, Lake and Streambed Alteration Agreements, state lands leases or permits, federal wetland or navigable water permits, waterfront facility approvals, and related local land-use approvals. |
| Proposition 65 warnings and chemical exposure thresholds | Usually not a permit; OEHHA provides scientific listings and safe harbor levels | OEHHA supports the science behind listed chemicals and exposure levels, while enforcement can involve the Attorney General, district attorneys, city attorneys, or private enforcers. |
The practical rule is simple: identify the activity first, then identify the permit pathway. A new boiler may require an AQMD/APCD air permit, a building permit, fire review, and fuel-storage approval. A new process tank may require local hazardous materials reporting, wastewater authorization, air district review, and hazardous waste planning. A facility expansion may require air permits, stormwater coverage, wastewater discharge approval, hazardous materials inventory updates, and local construction approvals. One agency’s approval rarely means every related permit has been satisfied.
A Simple Way to Decide Who Regulates What
Use this screening test: Does the activity emit to air, discharge to water, store hazardous materials, generate waste, involve pesticides, create toxic exposure concerns, use radiation-producing equipment, or affect construction, drainage, waterways, wetlands, coastlines, ports, storm drains, flood channels, or public rights-of-way? Each “yes” points to one or more regulators. The goal is not to memorize every agency; it is to map each business activity to the pathway it affects before buying equipment, changing operations, signing a lease, or starting construction.
Electronic Reporting Systems Businesses May Need to Use
Many California obligations are handled through electronic portals. CERS is generally used for CUPA/Unified Program reporting; SMARTS, CIWQS, and GeoTracker are Water Board systems; CARB uses program-specific fleet, engine, refrigerant, and equipment systems; local AQMDs/APCDs may have their own permit and emissions portals; CalRecycle, DPR, CDPH-RHB, CDFW, State Lands, and USACE also use separate systems. Submitting in one portal does not satisfy another agency’s separate reporting requirement.
| Electronic System | Agency or Program | What Businesses Commonly Use It For |
| CERS — California Environmental Reporting System | CalEPA Unified Program / local CUPAs | Hazardous materials business plans, chemical inventories, facility information, emergency contacts, site maps, underground storage tank information, aboveground petroleum storage information, hazardous waste generator information, and other Unified Program submissions. Some local agencies use their own local reporting portal that exchanges data with CERS. |
| SMARTS — Stormwater Multiple Application and Report Tracking System | State Water Board / Regional Water Boards | Industrial and construction stormwater permit enrollment, notices of intent, annual reports, monitoring data, and stormwater compliance documents. |
| CIWQS — California Integrated Water Quality System | State Water Board / Regional Water Boards | NPDES permit information, electronic self-monitoring reports, sanitary sewer overflow reporting, inspections, violations, enforcement tracking, and water-quality permit data. |
| GeoTracker / Electronic Submittal of Information | State Water Board / Regional Water Boards | Cleanup cases, leaking underground storage tank sites, groundwater monitoring, site investigation data, laboratory data uploads, maps, compliance documents, and other regulated discharge or cleanup information. |
| CARB reporting applications, including DOORS, TRUCRS, CTC-VIS, ACTRS, PERP, R3, and other program portals | CARB | Fleet and mobile-source reporting, off-road diesel equipment, truck and bus compliance, clean truck check reporting, advanced clean fleet reporting, portable equipment registration, refrigerant reporting, transport refrigeration units, and other statewide air program submissions. |
| Local AQMD/APCD online systems | Local air districts | Air permit applications, permit fee payments, annual emissions reports, breakdown or variance notifications, asbestos notifications, complaint submissions, facility information, and emissions inventory reporting. For example, South Coast AQMD uses online services including its Annual Emissions Reporting system and online permit/payment tools. |
| RDRS, SWIS, and CalRecycle reporting portals | CalRecycle and local enforcement agencies | Recycling and disposal reporting, solid waste facility information, local enforcement agency uploads, jurisdiction annual reporting, organics and diversion reporting, and waste-management program data. |
| CalPEST | DPR | Pesticide product registration submissions, amendments, renewals, fee payments, company changes, stand-alone data submissions, and tracking DPR’s review of pesticide registration actions. |
| CalAgPermits | County agricultural commissioners / DPR-supported pesticide programs | Restricted materials permits, operator identification numbers, notices of intent, pesticide use reports, and some structural fumigation notifications. Access is typically managed through the county agricultural commissioner. |
| EnviroStor | DTSC | Public access to information on cleanup sites, hazardous waste facilities, permitting, enforcement, and sites with known or suspected contamination. Businesses may use it for due diligence and site research even when formal submittals are handled through other DTSC or federal systems. |
| RCRAInfo and e-Manifest | U.S. EPA / DTSC-related hazardous waste programs | Hazardous waste identification, generator and handler information, electronic manifests, biennial reporting where applicable, and federal hazardous waste tracking that may connect with California hazardous waste obligations. |
| Radiation Machine Registration Portal and RHB online registration tools | CDPH Radiologic Health Branch | Registration of radiation-producing machines such as X-ray equipment, updates to facility or machine information, and related radiation-machine compliance submissions. Radioactive materials licensing may involve separate RHB forms, program contacts, and licensing processes. |
| EPIMS — Environmental Permit Information Management System | CDFW | Electronic notification and document submission for Lake and Streambed Alteration Agreements and other CDFW environmental permitting actions. |
| OSCAR — Online System for Customer Applications and Records | California State Lands Commission | Online inquiries and applications for leases or permits to use state lands managed by the State Lands Commission. |
| USACE Regulatory Request System | U.S. Army Corps of Engineers | Permit screening, jurisdictional determinations, and regulatory requests for projects involving wetlands, waters of the United States, navigable waters, dredged or fill material, and related federal permit questions. |
Agency Contact Information and Where to Start
Because many permits are regional or local, the most useful contact is often not the statewide headquarters—it is the district, regional board, CUPA, sanitation district, city, county, or county agricultural commissioner for the facility’s actual address. Still, the contacts below give business owners and plant managers a practical starting point when they are unsure where to begin.
| Agency or Contact Point | Best Used For | Contact Information |
| CalEPA Office of the Secretary | General CalEPA questions, cross-agency coordination, environmental complaints, and the CalEPA ombudsman process for permit or regulatory issues. | Main telephone: (916) 323-2514. CalEPA headquarters: 1001 I Street, Sacramento, CA 95814. For environmental concerns, CalEPA also routes complaints through its environmental complaint system. |
| CARB | Statewide air programs, diesel and fleet rules, mobile sources, fuels, refrigerants, greenhouse-gas reporting, portable equipment registration, and CARB program questions. | General helpline: (800) 242-4450. Email: helpline@arb.ca.gov. Address: 1001 I Street, Sacramento, CA 95814. Program-specific contacts include diesel, TRU, DOORS, portable equipment, refrigerant management, and public records contacts. |
| Local AQMD or APCD | Air permits for stationary equipment, permits to construct, permits to operate, source testing, odors, dust, emissions, toxic air contaminants, air district inspections, and local air rule interpretation. | Use the local air district for the facility address. For South Coast AQMD: main number (909) 396-2000; permit information (909) 396-3385; Small Business Assistance (800) 388-2121 or (909) 396-3529; smallbizassistance@aqmd.gov; headquarters at 21865 Copley Drive, Diamond Bar, CA 91765. |
| State Water Resources Control Board and Regional Water Boards | Industrial stormwater, wastewater discharges, water quality, groundwater cleanup, surface water, drinking water, water rights, and regional water permits or orders. | State Water Board main contact: 1001 I Street, Sacramento, CA 95814. Board Clerk: (916) 341-5600. Stormwater permitting: stormwater@waterboards.ca.gov or (916) 341-5536. Water rights: dwr@waterboards.ca.gov or (916) 341-5300. Use the Regional Water Board directory for site-specific regional contacts. |
| DTSC | Hazardous waste, hazardous waste generators, treatment authorization, manifests, e-manifest questions, contaminated property, site cleanup, emergency permits, and toxic substances questions. | DTSC maintains program-specific contacts. Common contacts include e-Manifest and RCRAInfo help at (800) 618-6942 and myRCRAid@dtsc.ca.gov; Electronic Verification Questionnaire support at (877) 454-4012 and evq@dtsc.ca.gov; emergency permits at Emer_Permit@dtsc.ca.gov. Businesses should use DTSC’s program contact page for the correct program office. |
| Local CUPA | Hazardous materials business plans, CERS reporting, underground storage tanks, aboveground petroleum storage program oversight, hazardous waste generator inspections, CalARP, local emergency response, and hazardous materials inspections. | Use the CalEPA Unified Program Regulator Directory to find the CUPA for the facility address, county, or ZIP code. CalEPA Unified Program general information: (916) 327-9559 or cupa@calepa.ca.gov. CERS support: cers@calepa.ca.gov. |
| CalRecycle | Solid waste, recycling, organics, waste reduction, beverage container recycling, used oil, tires, electronic waste, grants, local enforcement agency issues, and waste-diversion programs. | Main number: (916) 322-4027. Toll-free: 800-RECYCLE or (800) 732-9253. Beverage container recycling complaints: complaints@calrecycle.ca.gov. Waste reduction business assistance: BZAssist@calrecycle.ca.gov. |
| DPR and County Agricultural Commissioners | Pesticide sales, registration, licensing, restricted materials, pesticide use, pesticide incidents, worker protection, and local pesticide enforcement. | DPR general questions: cdprweb@cdpr.ca.gov or (916) 445-4300. Licensing: licensemail@cdpr.ca.gov or (916) 445-4038. For local enforcement and restricted material permits, contact the county agricultural commissioner for the county where the pesticide activity occurs. |
| OEHHA | Proposition 65, chemical risk information, safe harbor levels, CalEnviroScreen questions, fish advisories, and scientific environmental health information. | Sacramento office: (916) 324-7572. Oakland office: (510) 622-3200. Sacramento office: 1001 I Street, Sacramento, CA 95814. Oakland office: 1515 Clay Street, 16th Floor, Oakland, CA 94612. |
| CDPH Radiologic Health Branch | Radiation machines, X-ray devices, radioactive materials, industrial radiography, gauges, generally licensed devices, radiation safety programs, facility inspections, and radiation incidents. | Main number: (916) 327-5106. X-ray registration email: XrayRegistration@cdph.ca.gov. Businesses should contact RHB before acquiring, installing, transferring, or operating radiation-producing equipment or radioactive-material devices. |
| Cal OES State Warning Center | Significant or threatened releases of hazardous materials, oil, or radioactive materials; emergency release notifications; and statewide hazardous materials incident coordination. | State Warning Center: (800) 852-7550. Companies should also call 911 or the local administering agency when required, and should follow written emergency notification procedures. |
| Cal/OSHA Consultation Services | Worker-safety questions involving hazardous chemicals, hazard communication, emergency response, PPE, respirators, confined spaces, heat, noise, and safety programs. | Use Cal/OSHA Consultation Services or the local Cal/OSHA consultation office for non-enforcement assistance. Employers should also review applicable Title 8 requirements for workplace safety and health obligations. |
| CDFW | Streambed alteration, work in streams, lakes, washes, wetlands, riparian habitat, wildlife impacts, and oil-spill prevention and response planning through OSPR. | Contact the CDFW regional office for the project location. For Lake and Streambed Alteration matters, CDFW uses EPIMS and regional office contacts. For oil-spill planning, use CDFW OSPR program contacts. |
| California Coastal Commission, BCDC, and State Lands Commission | Coastal development, San Francisco Bay shoreline or fill, public trust lands, tide and submerged lands, waterfront leases, docks, wharves, pipelines, and port or shoreline projects. | Contact depends on project location. Coastal Commission district offices handle coastal-zone issues; BCDC can be reached at info@bcdc.ca.gov or (415) 352-3600; State Lands Commission inquiries and applications can be submitted through OSCAR or by calling (916) 574-1940. |
| Local city, county, fire department, sanitation district, or building department | Building permits, fire code, hazardous occupancy, zoning, business licenses, sewer discharge approvals, grading, construction, tenant improvements, tanks, and local operating approvals. | Contact the city or county for the facility address. For sewer discharge or pretreatment, contact the local sanitation district or publicly owned treatment works before discharging process wastewater to the sanitary sewer. |
When calling an agency, be ready with the facility address, legal business name, equipment description, process description, chemicals used, waste streams generated, operating schedule, permit numbers if known, and the reason for the call. For air, water, CUPA, sewer, fire, and building questions, the facility address is especially important because jurisdiction changes by location.
Common Questions and Gray Areas Businesses Still Have
Who should I call first?
Start with the pathway. Air equipment usually starts with the local AQMD/APCD. Hazardous materials, CERS, tanks, and local hazardous waste inspections usually start with the CUPA. Stormwater, wastewater, groundwater, and surface water usually start with the Regional Water Board or sanitation district. Contaminated property or hazardous waste treatment may require DTSC. Radiation equipment points to CDPH-RHB. Construction, fire code, zoning, or occupancy questions usually start with the city, county, or fire department. When unsure, call the local agency for the facility address and ask what other regulators may apply.
What changes commonly trigger new permits or updates?
- Installing, replacing, relocating, or modifying equipment.
- Increasing production, throughput, operating hours, or fuel use.
- Changing coatings, solvents, raw materials, cleaners, fuels, or chemical formulations.
- Adding outdoor storage, tanks, drums, silos, waste areas, or containment systems.
- Creating a new waste stream or changing how a waste is stored, treated, recycled, or shipped.
- Changing wastewater discharge points, sewer connections, washdown practices, or stormwater exposure.
- Changing ownership, business name, tenant, operator, or facility address.
- Starting construction, tenant improvements, grading, demolition, or equipment anchoring.
- Acquiring, installing, transferring, removing, or operating X-ray machines, radiation-producing equipment, radioactive-material devices, industrial radiography equipment, gauges, or other regulated radiation sources.
What is the difference between a permit, registration, plan, report, and record?
A permit usually gives permission to construct, operate, discharge, store, treat, or conduct a regulated activity under conditions. A registration may place a piece of equipment, business activity, or program into a statewide or local compliance system. A plan explains how the facility will manage risk, such as a hazardous materials business plan, stormwater pollution prevention plan, spill prevention plan, emergency response plan, or risk management plan. A report provides periodic information to an agency, such as emissions data, waste summaries, monitoring results, or discharge data. A record is documentation the facility keeps to prove compliance during inspections.
Why do inspectors mention RCRA if California has DTSC?
Inspectors mention RCRA because California’s hazardous waste program is built on a federal framework. DTSC and CUPAs enforce many California requirements, but terms such as EPA ID number, RCRAInfo, e-Manifest, generator category, treatment, storage, disposal, and corrective action come from that federal structure. California may add stricter requirements, so businesses need both the federal framework and California-specific rules in view.
What if two agencies give different answers?
Different answers usually mean different legal questions. An air district may say equipment is exempt from an air permit, while CUPA may still require hazardous materials reporting; a sanitation district may allow a sewer discharge, while DTSC may regulate the sludge as hazardous waste. Document each answer, ask whether other agencies may have authority, and never treat one approval as universal permission.
Who can inspect, and what do inspectors usually ask for?
Several agencies may inspect the same facility. Air inspectors review permits, equipment, source-test records, usage logs, and emissions records. CUPA inspectors review CERS submissions, chemical inventories, tank records, emergency procedures, and hazardous waste practices. Water inspectors review drainage, stormwater controls, monitoring data, discharges, and spill prevention. CDPH-RHB may review radiation registrations, licenses, shielding, dosimetry, postings, and incident records. Fire departments focus on hazardous occupancy, storage, access, and fire protection.
What should a company do after a spill, release, fire, or unauthorized discharge?
First protect people, stop the release if it can be done safely, and keep material out of storm drains, soil, groundwater, surface water, and sewers. Then determine required notifications, which may involve emergency responders, CUPA, fire department, Regional Water Board, sanitation district, AQMD/APCD, DTSC, Cal OES, insurer, landlord, or property owner. The notification path depends on what was released, how much, where it went, and whether people, property, air, water, soil, or public infrastructure are threatened.
Who is responsible: the tenant, landlord, property owner, or operator?
Responsibility depends on the law, lease terms, permit conditions, site history, and who controls the activity. Tenants often control processes, chemicals, wastes, and equipment; landlords or owners may control tanks, stormwater systems, sewer connections, structures, property access, or contamination history. Leases should clearly address permits, inspections, spills, waste management, cleanup, access, and cost responsibility.
Where do federal EPA and Cal/OSHA fit?
EPA can still be involved where federal environmental law applies, even when California agencies implement the day-to-day program. Cal/OSHA is not an environmental permitting agency, but chemical exposure, emergency response, confined spaces, air contaminants, PPE, training, and injury prevention often overlap with environmental compliance.
What if the company uses X-ray machines or radioactive materials?
X-ray machines, industrial radiography equipment, analytical X-ray devices, gauges, and radioactive-material devices may require registration, licensing, approved safety procedures, postings, training, shielding review, monitoring, and incident reporting. Before acquiring or moving this equipment, contact CDPH-RHB and confirm whether local building, fire, electrical, or Cal/OSHA approvals are also needed.
When should a company bring in outside help?
Outside help is useful before buying equipment, expanding production, changing chemicals, leasing or buying property, classifying complex waste, responding to spills or notices of violation, negotiating permit conditions, or handling contaminated soil or groundwater. The right support may be an environmental consultant, air permitting specialist, hazardous waste consultant, stormwater professional, industrial hygienist, engineer, or environmental attorney.
Practical Takeaways for Business Owners and Plant Managers
- Start with the activity, not the agency. Ask what your facility does: emits, discharges, stores, treats, transports, recycles, applies, or disposes.
- Identify the local air district early. Before buying or relocating equipment, confirm whether your facility is in South Coast AQMD, Bay Area AQMD, San Joaquin Valley APCD, San Diego County APCD, Mojave Desert AQMD, or another district, because permit thresholds and rule requirements vary.
- Do not assume “vendor compliant” means “facility permitted.” Equipment may meet a design standard but still require local air permits, source testing, recordkeeping, or operating limits.
- Do not overlook radiation equipment. X-ray machines, industrial radiography equipment, gauges, analytical devices, and radioactive-material sources may require CDPH Radiologic Health Branch registration, licensing, inspection, and safety controls.
- Expect more than one regulator for the same event. A spill, waste stream, or process change can create air, water, hazardous waste, hazardous materials, local fire, and reporting obligations at the same time.
- Keep permits and plans aligned. Air permits, stormwater plans, hazardous materials inventories, waste profiles, emergency plans, wastewater authorizations, and operating procedures should describe the same processes and materials consistently.
- Document classification decisions. Keep records explaining why a material is managed as a product, recyclable material, solid waste, hazardous waste, universal waste, wastewater, or byproduct.
- Communicate before changes. New equipment, new chemicals, outdoor storage changes, production increases, operating-hour changes, or waste-stream changes can trigger new requirements before the change is fully operational.
- Use agency overlap as a checklist, not a contradiction. If two agencies ask different questions, answer both. One approval rarely cancels another agency’s authority.
Bottom Line
California’s environmental system is layered because business activities can affect air, water, waste, hazardous materials, public health, worker safety, radiation, land use, emergency response, and natural resources at the same time. The best compliance strategy is to map each facility activity to the pathway it affects, identify the correct state, regional, local, or federal agency, and address overlapping approvals before purchasing equipment, changing operations, storing materials differently, acquiring radiation devices, signing a lease, or expanding the facility.