California CUPA requirements apply to any facility in the state that handles hazardous materials, generates hazardous waste, or stores petroleum in regulated tanks, and compliance means identifying which of six consolidated program elements cover your operation, filing the required data through the California Environmental Reporting System (CERS), and holding a current Unified Program Facility Permit from your local Certified Unified Program Agency.1California Legislative Information. California Health and Safety Code HSC 25404 The CUPA is your single point of contact for permits, inspections, and reporting that would otherwise sit with several state departments.
Find Your Local CUPA First
There is one CUPA per jurisdiction, but the specific agency varies. Yours might be a county environmental health department, a city fire department, or a standalone hazardous materials division. Some jurisdictions split the work with a Participating Agency that handles one or two elements, while the CUPA keeps overall administrative responsibility.2California Legislative Information. California Health and Safety Code HSC 25404.1
CalEPA maintains an online Unified Program Regulator Directory that lets you search by address or county to find your local CUPA and any Participating Agencies. That lookup is the fastest way to confirm who has jurisdiction over your facility before you start any filings.
The Six Program Elements and Which Ones You Trigger
The Unified Program consolidates six regulatory programs. A single facility often falls under several of them at once; a small shop might only touch one or two.
- Hazardous Waste Generator Program. Covers any business that produces hazardous waste, from large manufacturers down to small shops generating used solvents. Requirements include proper labeling, storage time limits, and tracking waste from creation through disposal.1California Legislative Information. California Health and Safety Code HSC 25404
- Hazardous Materials Business Plan (HMBP). Required for facilities handling hazardous materials above threshold quantities. The plan must include a chemical inventory, site map, emergency response procedures, and training documentation.3CalEPA. Hazardous Materials Business Plan FAQ
- California Accidental Release Prevention (CalARP). Applies to facilities handling regulated toxic or flammable substances above threshold planning quantities. Covered businesses develop a Risk Management Plan addressing worst-case release scenarios and prevention measures.
- Underground Storage Tank (UST) Program. Any facility with underground tanks storing hazardous substances needs a permit, continuous leak monitoring, and evidence of financial responsibility for cleanup costs. Permits run five years and must be renewed through the local agency.4California State Water Resources Control Board. Statutes of Chapter 6.7 Health and Safety Code Underground Storage Tanks
- Aboveground Petroleum Storage Act (APSA). Regulates tank facilities with combined aboveground petroleum capacity of 1,320 gallons or more in containers of at least 55 gallons each. Covered facilities must prepare and implement a Spill Prevention, Control, and Countermeasure (SPCC) plan meeting federal requirements.5CAL FIRE-Office of the State Fire Marshal. Aboveground Petroleum Storage Act
- Hazardous Materials Management Plan and Inventory Statement (HMMP/HMIS). Adopted into the California Fire Code as Part 9 of Title 24, this element ensures fire departments and first responders have current chemical hazard data for every regulated facility.6Office of the State Fire Marshal. HAZMAT Materials Management Plan and Inventory Statement
Reporting Thresholds and Exemptions
The HMBP requirement kicks in when your facility handles any hazardous material at or above 55 gallons of a liquid, 500 pounds of a solid, or 200 cubic feet of a compressed gas at any one time during the year. Extremely hazardous substances have a lower bar: the federal threshold planning quantity or 500 pounds, whichever is less.3CalEPA. Hazardous Materials Business Plan FAQ
Several categories are exempt regardless of volume: vehicle fuels used solely for that vehicle’s motive power, consumer products in retail stores with NFPA/HMIS ratings of 1 or 2, refrigerants in closed comfort-cooling systems (excluding ammonia and flammable gases), compressed air for emergency response, fluid in hydraulic systems when total facility oil stays below 1,320 gallons, and mixtures containing less than 1% of a hazardous component or less than 0.1% of a carcinogen.
Some materials carry elevated thresholds. Simple asphyxiants such as nitrogen, helium, and argon are exempt below 1,000 cubic feet. Lubricating oil triggers reporting only above 55 gallons of a single type or 275 gallons in the aggregate. Irritants and sensitizers don’t count until you exceed 550 gallons for liquids or 5,000 pounds for solids. A fair number of facilities assume they’re covered when they aren’t, or the reverse, so check the exact thresholds against what’s actually on site.
Filing Through CERS
All Unified Program reporting runs through the California Environmental Reporting System. Register for an account, claim your facility using your physical address or existing CERS ID, and complete a submittal for each program element that applies.
Hazardous Materials Inventory
The inventory is the backbone of your filing. For every reportable hazardous material at the facility you must provide the common name, physical state, maximum daily amount, units, and storage container type. CAS numbers are encouraged but not required under the CERS data dictionary. Maximum daily amount must reflect at least the prior year’s inventory plus any projected changes, and cannot be less than the maximum capacity of the containers on site.7Legal Information Institute. California Code of Regulations Title 27 Division 3 Chapter 2 – Hazardous Materials Inventory Chemical Description
Site Map and Emergency Response Plan
Your site map must show north orientation, adjacent streets, access and exit points, evacuation staging areas, hazardous material storage locations, and emergency response equipment. Loading areas, internal roads, storm and sewer drains, and emergency shutoffs go on the map when present. Local CUPAs may add their own map requirements by ordinance.3CalEPA. Hazardous Materials Business Plan FAQ
The emergency response plan must cover notification of local emergency responders, the CUPA, and the California Governor’s Office of Emergency Services in the event of a release, plus spill mitigation steps and on-site evacuation procedures.3CalEPA. Hazardous Materials Business Plan FAQ
Employee Training Records
Every HMBP facility must maintain a training program covering safe handling of hazardous materials, coordination with local emergency responders, and proper use of on-site emergency equipment. Depending on business size, materials involved, and proximity to residential areas, training may also need to address post-earthquake inspection procedures and notification of the Office of Emergency Services. Keep records for at least three years, logging employee name, training date, and trainer name.3CalEPA. Hazardous Materials Business Plan FAQ
EPA Identification Number
If your facility generates, transports, treats, stores, or disposes of hazardous waste, you need an EPA Identification Number from the Department of Toxic Substances Control before you can complete the related CERS filings.8Department of Toxic Substances Control. Apply For A Hazardous Waste EPA Identification Number This is a separate step from CERS registration. Facilities that only trigger HMBP or APSA and don’t generate hazardous waste may not need one.
The Unified Program Facility Permit
After you submit your CERS data and the CUPA reviews it, the agency issues a Unified Program Facility Permit covering all applicable elements. You pay a consolidated fee that replaces what used to be separate payments to multiple agencies. Fee amounts vary by jurisdiction and facility complexity because each CUPA sets its own schedule to recover its reasonable costs.
The permit isn’t a one-time event. Update your CERS submittals whenever your chemical inventory changes materially, and expect most CUPAs to require annual recertification along with the annual fee. Letting a permit lapse while you continue to handle hazardous materials is itself a violation.
What to Have Ready for Inspection
Inspection frequency depends on the program element. Underground storage tanks get inspected at least once a year. HMBP, CalARP, and APSA facilities with 10,000 gallons or more of petroleum are inspected at least every three years. The hazardous waste generator program has no mandated minimum frequency, though CUPAs inspect generators on their own schedules.9Legal Information Institute. California Code of Regulations Title 27 Section 15200 – Inspection and Enforcement
Inspectors use your CERS submittals as their roadmap. They walk the facility comparing what you reported against what’s physically present: chemical storage locations against the site map, inventory quantities and container types for accuracy, labels and signage in place. They review hazardous waste handling practices, accumulation times, and manifests.
Before an inspection, make sure the following are current and accessible: your EPA ID documentation, at least three years of hazardous waste manifests, training records for all employees (including third-party waste technicians), inspection and maintenance logs for tanks and spill equipment, and any written emergency programs. Medical waste tracking documents should be available for at least two years if applicable. Inspectors are trained to check the building exterior for immediate hazards before walking inside, so outdoor storage areas and storm drains deserve attention.
Penalties and How to Appeal
Penalty ranges vary sharply by program element. The older $25,000 cap some owners remember was raised years ago.
- Hazardous waste violations: up to $70,000 per violation per day. Intentional disposal at an unauthorized site carries a minimum of $1,000 per violation per day.10California Legislative Information. California Health and Safety Code HSC 25189
- Underground storage tanks: between $500 and $5,000 per tank per day for standard violations; corrective action violations can reach $10,000 per tank per day.4California State Water Resources Control Board. Statutes of Chapter 6.7 Health and Safety Code Underground Storage Tanks
- HMBP violations: up to $2,000 per day, rising to $5,000 per day for knowing violations.
- CalARP violations: up to $5,000 per day, rising to $10,000 per day for knowing violations.
- APSA violations: up to $5,000 per day for a first offense, rising to $10,000 per day for repeat violations.
When setting a specific amount, the CUPA weighs the nature and gravity of the violation, your past efforts to prevent or clean up hazards, your ability to pay, and the deterrent effect. Enforcement style varies. Some agencies lean on compliance assistance and will work with you through a correction period; others move quickly to formal penalties, often depending on whether the problem looks like oversight or willful neglect.
If you receive a notice of violation or administrative penalty, you can contest it. The window for requesting a hearing typically falls between 10 and 30 days from the date you receive the citation, depending on local procedures and the program element involved. Miss the window and the penalty generally becomes final. CalEPA publishes guidance on Administrative Enforcement Orders, including the procedure for accessing an administrative law judge.11CalEPA. Information on Administrative Enforcement Orders Supplemental Environmental Projects may allow up to 50% of a penalty to be redirected toward an approved environmental benefit instead of paid as a straight fine.
Ownership Changes and Facility Closures
When a business holding a CUPA permit changes hands, the new owner must notify the local CUPA and initiate a facility transfer in CERS. The transfer lets the new owner claim the existing CERS ID for that physical address, and the CUPA decides whether to carry forward the facility’s submittal history or archive it.12CalEPA. CERS Regulator Portal Help – Facility Transfers in CERS The new owner then updates facility information, verifies the chemical inventory, and makes sure the emergency response plan reflects current operations. Don’t assume the old owner’s permit transfers automatically; until the CUPA formally approves the change, the new owner is operating without valid authorization.
If you’re permanently closing a facility with underground storage tanks, submit closure documentation to CERS within 30 days after removing or closing the tanks. The process requires two separate CERS submittals: one documenting the actual closure or removal of each tank, and a second confirming that no regulated USTs remain by updating your Business Activities section.13California Environmental Reporting System. Reporting Closure of a Facilitys Remaining USTs Coordinate with your local CUPA on the physical closure or removal first, since that requires its own permits and oversight.
Facilities closing out of other elements (HMBP, APSA, hazardous waste) should update their CERS records to reflect that those activities have ceased, and should document proper disposal or transfer of any remaining hazardous materials. Leaving an inactive facility’s CERS profile open invites inspection notices and potential violations for failure to report.