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Hazardous Materials (CUPA)


Certified Unified Program Agency (CUPA)

IMPORTANT: Environmental Health Services is transitioning to an online portal in 2024 to streamline the process of managing permits and billing. If you did not already respond to the postcard mailer or email that went out in November and December, please review the email (click here) for further instructions. It is critical that we collect contact information to designate someone as a primary user who will be responsible for managing your business’ online account.


The Unified Hazardous Waste and Hazardous Materials Management Regulatory Program (Unified Program) was established in 1993 to protect public health and safety, and to restore and enhance environmental quality, and sustain economic vitality through an effective and efficient implementation of the Unified Program. San Mateo County Environmental Health Services was designated by the State Secretary for Environmental Protection as the Certified Unified Program Agency (CUPA) for San Mateo County in 1996.

Compliance is achieved through routine inspections of regulated facilities, and investigation of citizen-based complaints and inquiries regarding improper handling and/or disposal of hazardous materials and/or hazardous wastes.

If your facility needs to be regulated for any of the CUPA programs listed below, you need to obtain a permit by registering your facility with San Mateo County Environmental Health Services. Please contact the designated district inspector for assistance with the registration process.

A complete list of active and inactive hazardous waste (CUPA) regulated facilities is now available on the County’s Open Data site.  The list is updated monthly.  Site-specific information can be found on the State’s Regulated Site Portal.  This site includes activities related to hazardous materials and waste, state and federal cleanups, impacted ground and surface waters, and toxic materials.  It is maintained by the California Environmental Protection Agency and the information is updated monthly.  On this site, you will find information about regulated facilities, chemical storage, open violations.  If you would like additional details about a particular facility, please make a public records request


The California Environmental Protection Agency (CalEPA) has increased the state oversight surcharge on all CUPA regulated facilities from $84 to $94 dollars effective October 13, 2023. The increase includes $10 to cover the increased costs of overseeing the Unified Program. The CERS NextGen portion of the surcharge remains $27 at this time.

The CalARP surcharge, which has only increased one, 15 years ago, has increased from $270 to $370.

The Underground Storage Tank and Aboveground Petroleum Storage Act, components of the state surcharge remain unchanged.

The surcharge increases will be collected for the entire FY23/24. If a business was billed for this fiscal year prior to the increase effective date, the difference will be billed at a later date.

Additional information can be found at  Any questions or concerns about the surcharge increase can be directed to CalEPA at


New Facility Permit Registration Form

Quick Guide to Compliance

Sign up for CUPA HAZMAT Compliance Updates

CalARP Program RMP Public Review Notice

Hazardous Materials Ordinance Changes


Tiered Permitting Program

Treatment means any method, technique or process that changes the physical, chemical or biological character or composition of a hazardous waste, or removes or reduces its harmful properties or characteristics.

screenshot of CERS Central Webpage

Electronic Reporting

Electronic Reporting

Electronic submission of the Hazardous Materials Business Plans (HMBPs) and Underground Storage Tank (UST) information is required (AB 2286, Feuer) by submission via the California Environmental Reporting System (CERS) established by CalEPA. Historically, San Mateo County businesses had two options for electronic submissions: the San Mateo County Environmental Health Services Public Portal (EHS Portal) and CERS.