What BAAQMD Is

The Bay Area Air Quality Management District is the local air agency for nine counties around San Francisco Bay. It operates within the framework of the federal Clean Air Act and the California Clean Air Act, with the California Air Resources Board (CARB) above the district. BAAQMD headquarters and submittals are in San Francisco. Most permit correspondence routes through assigned district engineers, and Annual Emissions Reports and graphic arts registrations now run through the district’s online portal at myaironline.baaqmd.gov.

BAAQMD writes its own rules within state and federal frameworks. The Bay Area air basin has different challenges than the South Coast Air Basin, so BAAQMD’s thresholds, exemptions, and forms do not match SCAQMD’s. A piece of equipment that needs a written permit in Los Angeles County may be exempt under BAAQMD, and the reverse is also true. If your company runs facilities in both districts, treat each district as its own determination.

The P-101B Application Packet

Where SCAQMD uses the 400-series, BAAQMD uses Form P-101B as the spine of every permit application, plus source-specific supplemental forms for each piece of equipment.

One detail Bay Area operators sometimes miss: BAAQMD permits equipment, not chemicals. Each emission source gets its own application path. Solvent wipe cleaning is the exception. There, the permit is keyed to the gallons of solvent used in the operation, not to a piece of hardware.

BAAQMD Regulations to Know

BAAQMD rules are organized into Regulations, each split into Rules. The list below is the set Bay Area facilities run into most often.

A single facility can land under several rules at once. A metal finisher with paint, plating, and abrasive blasting can be subject to Regulation 2 Rule 1 for permits, Regulation 6 Rule 1 for particulates, Regulation 8 Rule 16 for solvent cleaning, Regulation 8 Rule 19 for metal coating, and Regulation 11 for hexavalent chromium. The rules layer; one does not replace another.

Common BAAQMD Exemptions and Thresholds

Regulation 2, Rule 1 sets out which equipment does not need a written permit. The exemptions most Bay Area facilities cite:

• Solvent wipe cleaning below 20 gallons per year or 150 pounds per year of VOC (Regulation 2, Rule 1, Section 118.9). Above either threshold, a permit applies and the operation is keyed to gallons used.
• Non-refillable hand-held aerosol cans (Section 118.10).
• Acetone-based cleaning. Acetone has been classified as an exempt solvent since 1996.
• Combustion equipment below 1 million BTU per hour. Natural-gas-fired equipment is exempt up to 10 million BTU per hour, with one important wrinkle: natural gas boilers between 2 and 10 million BTU per hour need to be registered with the district even though they do not need a written PTO.
• Internal combustion engines rated 50 brake horsepower or less. BAAQMD requires a permit for stationary engines larger than 50 bhp; smaller engines are generally exempt, though use patterns can still trigger registration or other rules. Confirm against the current rule before assuming exempt status.
• Coffee roasters below 15 pounds per hour.
• Portable abrasive blasting equipment. Stationary blast booths almost always require a permit.
• Brazing, soldering, and welding equipment in most contexts.
• Electrolytic plating with specific metals. BAAQMD’s plating exemption is broader than SCAQMD’s. Operators of plating shops with operations in both regions should not assume one district’s determination carries to the other.

If your equipment falls inside one of these categories and the district later asks, a formal Certificate of Exemption is available on request, though most facilities document the exemption with a CDMS-prepared confirmation letter and keep it on file rather than paying for a district-issued certificate. For a broader walkthrough of when a permit is and is not required, see our do I need an air quality permit guide.

The Graphic Arts Registration Path

BAAQMD treats graphic arts (printing) operations through a registration program rather than a standard PTO at moderate usage levels.

If a printing operation grows past the registration threshold, converting from a Graphic Arts registration to a standard PTO requires contacting the assigned district engineer with supporting documentation. Usage logs need to stay current on site either way. Inspectors ask.

The BAAQMD Permit Process

In practice, the path from “we are installing new equipment” to a Permit to Operate runs through nine steps:

When we walk a Bay Area facility for the first time, the first hour is almost always spent locating equipment data sheets, abatement device documentation, and any prior BAAQMD correspondence. We have seen facilities where the original spec sheets for a piece of equipment are gone, the original installer is out of business, and the only way to fill in the form is documented engineering assumptions called out transparently in the packet.

BAAQMD vs. SCAQMD: Why District Matters

The two largest California air districts run on different forms, different rules, and different exemption thresholds. Practical contrasts that matter for multi-region operators:

If your facilities span both regions, our SCAQMD permits guide covers the Southern California equivalent.

When BAAQMD Sends a Letter

Most BAAQMD correspondence falls into a handful of categories:

• AER notification or invoice. Annual Emissions Reports are required for facilities on the district’s list and increasingly for those meeting threshold conditions whether or not a letter arrives. The Annual Emissions Report California requirements guide covers the full filing.
• Permit renewal. Permits to Operate renew annually. Recertification or renewal applications generally need to go in about six months before expiration.
• Unpermitted equipment notice. “Our records indicate your facility may be operating equipment without a permit.” Often triggered by an ownership change, a prior inspection finding, or a tip from another agency. Calm response and a clean applicability review get the facility back on track. See operating without an air permit for the recovery path.
• Information request mid-application. District engineers commonly ask for additional calculations, supplemental forms, or SDS clarifications during ATC review.
• Notice of Violation. Issued after a documented compliance failure during an inspection. NOVs require a written response and sometimes a corrective action plan.

Each letter has a response window. Missing one usually compounds the issue.

How CDMS Works With Bay Area Facilities

For most Bay Area facilities, the engagement starts with a rule evaluation. We review your equipment, materials, and process against the current BAAQMD regulations and tell you in writing whether a permit is required. If the answer is no, the work stops there. If the answer is yes, the permit application becomes a separate fixed-price proposal.

For existing-permit facilities, we handle the annual cycle: PTO renewals, AER preparation through myaironline.baaqmd.gov, permit modifications when equipment changes (for example, a machine swap on a permitted source that requires a modification filing), and responses to district information requests as they come in. When we onboard a Bay Area client, one of the first things we do is reconcile the on-file permits against what is actually operating in the facility, because the gap between the two is where district notices come from.