Air Quality Compliance in California
If you operate equipment that emits anything into the air at a California facility, your local Air Quality Management District is part of your life.
If you operate equipment that emits anything into the air at a California facility, your local Air Quality Management District is part of your life. The district issues the permits. The district runs the inspections. The district publishes the list that decides which facilities owe an Annual Emissions Report each March. And when a notice arrives in the mail, you do not have time to figure out what it means from scratch.
CDMS helps California facilities get and keep their air permits, file their annual emissions reports, and respond when the air district has a question. We work with the four districts that cover most of the state: Bay Area (BAAQMD), South Coast (SCAQMD), San Joaquin Valley (SJVAPCD), and Sacramento Air District. If you already know you need permitting help and want to know what we do, this page covers the full scope of the service. If you are not sure whether your facility needs a permit at all, the section below walks you through how to tell.
Why Facilities Call Us
The conversation almost always starts the same way. Something has surfaced an air quality question the on-site team cannot answer alone. The most common openers we hear:
“We use products with VOCs. I think we are below permitting thresholds, but I am not sure.”
“We may have an air permit issue. We are operating something we may not be permitted for.”
“We are installing a new oven. Do we need a permit?”
“We just got a letter from SCAQMD. They want an Annual Emissions Report.”
“We changed ownership. The district says our permits are not in our name.”
“Our prior consultant left. We do not know what we owe or when.”
If any of those sound like your week, the rest of this page is for you. The work behind each scenario is different. The path forward is the same: figure out exactly what the district expects, file what is required, and keep a record that holds up if someone comes to look.
What Air Quality Compliance Covers in California
California has 35 Air Quality Management Districts. Each district writes its own rules within the framework of the federal Clean Air Act and the California Clean Air Act. The California Air Resources Board (CARB) sits above the districts. For most facilities, day-to-day compliance happens at the district level.
The work breaks into a handful of distinct programs. Each has its own trigger, its own filing, and its own way of finding you if you miss it.
| Program | What Triggers It | Who Enforces It | What’s Required |
|---|---|---|---|
| Authority to Construct (ATC) and Permit to Operate (PTO) | Installing or operating equipment that emits to the atmosphere (paint booths, ovens, plating tanks, abatement devices, large engines) | The local air district (BAAQMD, SCAQMD, SJVAPCD, Sacramento) | Application packet with equipment data, Safety Data Sheets (SDSs), site maps, and emission calculations. ATC issued before install; PTO issued after install and renewed annually. |
| Annual Emissions Report (AER) | Being on the district’s notification list, or meeting reporting thresholds for criteria pollutants, toxic air contaminants, or ozone depleters | The local air district | Annual filing of fuel use, material throughput, emissions per source, and waste recycling credits. Data covers January through December. |
| AB 2588 Air Toxics Inventory Report (ATIR) | Facilities flagged under the California Air Toxics “Hot Spots” Act | The local air district (under CARB framework) | Inventory of toxic air contaminants and emission factors. Public notification or Health Risk Assessment can follow in a small number of cases. |
| Title V Operating Permit | Major source thresholds under the federal program | The local air district administering the federal program | Federal operating permit with emission inventory, operational flexibility provisions, and annual compliance certification. |
| Permit Modifications | Change to permitted equipment, process, throughput, or ownership | The local air district | Modification application; sometimes a new ATC or PTO. |
These programs overlap. A metal finishing facility with heated plating tanks could trigger ATC and PTO for each tank, an AER every year, AB 2588 reporting, and the CARB Criteria and Toxics Reporting Regulation (CTR). Sorting out which programs apply to your specific operation is the first piece of work, and it is almost always cheaper to figure that out before equipment is installed than after.
How to Tell If You Need an Air Permit
Most facilities that come to us have at least one piece of equipment that needs a permit and at least one that does not. Activities that typically need a district permit in California include:
- Painting, printing, and spray-coating operations
- Solvent wipe cleaning above the district’s threshold (in BAAQMD: 20 gallons per year of solvent or 150 pounds per year of volatile organic compounds (VOC))
- Heated plating tanks, especially those using cadmium, nickel, hexavalent chromium, or lead
- Abrasive blasting (grit blast, shot blast) that is not portable equipment
- Combustion equipment above the district’s BTU threshold (BAAQMD registers natural gas boilers between 2 and 10 million BTU per hour and permits sources above 10 million)
- Internal combustion engines above the district’s horsepower threshold (thresholds vary by district and fuel type)
- Storage tanks of organic liquids above district size limits
- Semiconductor wafer fabrication
- Equipment producing visible emissions, dust, or persistent odors
If you operate one or more of those without a permit, the district can require you to apply, halt the equipment, or both. If you are not sure where you stand, an applicability determination is the cheapest way to find out. We review your equipment, materials, and process against the rules in your district and tell you in writing whether a permit is required. If the answer is no, the work stops there. We do not bill for a permit application if the review shows you do not need one. Read more about applicability determinations →
What Getting an Air Permit Actually Looks Like
California air permits come in two stages. The Authority to Construct (ATC) is issued before installation, after the district reviews equipment specifications and confirms the source will meet air quality rules. The Permit to Operate (PTO) is issued after installation, once the district confirms the equipment matches the ATC. PTOs renew annually.
The application packet is district-specific and detailed. A BAAQMD packet typically includes the project and equipment description, Form P-101B with the relevant source-specific forms (Combustion, Abatement Device, Surface Coating, Solvent Cleaning, Organic Storage, Semiconductor, Emission Point). The packet also includes a Google map, a facility map showing equipment location, SDSs for the materials in use, and any required form letters. A SCAQMD packet uses the 400-series: Form 400-CEQA, Form 400-PS, and per-equipment Forms 400-A and 400-E, plus SDSs and a fee check mailed to the district office in Diamond Bar.
To prepare a packet, we collect:
- SDSs, chemical usage rates, and material invoices
- Equipment data sheets and operations manuals
- Abatement device details
- Air flow in cubic feet per minute (CFM), vent diameters, and tank dimensions
- Install date and hours of operation
- Distance to the nearest school
- Any current air permits and any Notices of Violation
Where equipment is older and published emission data is unavailable, we work from documented engineering assumptions and call them out in the deliverable. New permit timelines in Southern California typically run six to nine months from submission to issuance, driven by district review capacity. Read the full application process →
If cost is what is holding you up, we cover the variables on a separate page: what affects the cost of an air quality permit. The short version: number of permits, district, equipment complexity, and whether the location triggers Health Risk Assessment or air dispersion modeling. We provide fixed-price proposals for the scope we can define and name the variables that would change the price.
Annual Reporting: AER, AB 2588, and CTR
The reporting side is where the most facilities get caught off guard. The Annual Emissions Report (AER) is required for facilities on the district’s notification list, and increasingly for facilities that meet reporting thresholds whether they were notified or not. Data covers the prior calendar year.
To prepare an AER, we gather fuel-use records, material invoices and SDSs for coatings, inks, solvents, and abrasives, process throughput, plating amp-hours for cadmium, nickel, hexavalent chromium, and lead baths, waste manifests (recycling earns fee credits, often around half of the fees), and abatement device efficiency data. Under SCAQMD Rule 301(e), reporting and fees apply at 4 or more tons of SOx, VOC, NOx, specific organic gases, or PM in the reporting period. They also apply at 100 tons or more of CO, and to any facility subject to the AB 2588 program or CARB’s CTR regulation. Other districts set their own thresholds.
AB 2588 is a separate program. It covers toxic air contaminants under the California Air Toxics “Hot Spots” Act. Most facilities never trigger public notification or a Health Risk Assessment, but the inventory itself is required for many regulated operations.
The third program clients ask about is the CARB Criteria and Toxics Reporting Regulation (CTR). Facilities with metal plating, anodizing, or grinding operations involving cadmium or chromium often qualify, and the Data Update Forms go out in early January. The three programs overlap but do not duplicate. Our side-by-side guide compares them: AER vs. AB 2588 vs. CTR →
If you have heard about a wave of new reporting requirements rolling in across the state, California’s converging annual emissions reporting explains what is changing and which facilities are likely to receive notifications for the first time.
How Industry Shapes the Work
District rules apply differently depending on what you actually do at the facility.
Metal finishing and plating shops deal with heated tanks, hexavalent chromium (SCAQMD Rule 1469), anodizing, abrasive blasting, and amp-hour reporting on regulated baths. Plating amp-hours feed both AER and CTR. Each abatement device on each tank gets its own form.
Spray booths and surface coating operations cover painting, printing, and solvent cleaning. The activities that get permits most often are painting, printing, isopropyl alcohol wipe cleaning, spray booths, epoxy or glue operations, and any process using 20 or more gallons per year of VOC materials.
Other industries we work with regularly include electronics, aerospace, food processing, cold storage, and chemical distribution. The deliverable is the same shape; the forms and rules differ by district and source type.
Knowing Your District
Most facilities deal with one district. Clients with sites in different regions deal with all of them.
- SCAQMD permits and rules guide: the South Coast district covering Los Angeles, Orange, Riverside, and San Bernardino counties. 400-series application forms, the Diamond Bar submittal process, and rules including 219, 301, 1401, and 1469.
- BAAQMD permits guide: the Bay Area district. Form P-101B and source-specific forms, Regulations 1, 2, 6, 8, and 11, and district registration processes for graphic arts and other limited sources.
- SJVAPCD: the San Joaquin Valley district covering the Central Valley.
- Sacramento Air District: the Sacramento metropolitan area.
We work with each of these on a regular basis. We rarely deal with CARB directly except where a district application requires it.
When the Permit Already Exists
Permits are not a one-time event. Each PTO is renewed annually. Each ATC is converted to a PTO after install. A change in equipment, throughput, or chemistry can require a permit modification. A change in ownership can leave permits unassigned if the transfer is not handled with the district.
Two patterns we see often:
A facility installs new equipment and the existing PTO is not updated. The district notices on the next inspection.
A facility changes owners. The new entity assumes the equipment is permitted. The district has no record of the change. The first notice arrives after the next site visit.
If you are operating equipment that was never permitted, or that the district says is not in your name, we have a separate page on getting back into compliance. It is calmer than it sounds. The district wants the paperwork right. We file the paperwork.
For facilities that want the program to stay current without a yearly fire drill, air compliance within ongoing management covers permit modifications on equipment changes, annual data submissions, AER filings, and renewal tracking handled on a calendar. We stay with the program through staff turnover at your facility, which is when most permits go sideways.
Title V and Major Sources
A small number of California facilities meet the federal Title V major source thresholds. These facilities operate under a single Title V Operating Permit that consolidates all of their air quality obligations. Title V requires an emission inventory, operational flexibility provisions written into the permit so the facility can adjust within limits without a full re-permit, and an annual compliance certification. The application work and the renewal work are both substantial. Read more about Title V operating permits in California →
Where Air Quality Crosses Other Programs
Some chemicals reported under an AER are also reportable under the federal Toxics Release Inventory (Form R). The two programs ask different questions but pull from the same usage data. If you file an AER and use any of the listed TRI chemicals above threshold, the federal report applies as well. The overlap between air emissions and Form R reporting →
Air monitoring inside the building, employee exposure to vapors, dust, mists, or other contaminants, sits under Cal/OSHA, not the air district. That is a separate service handled through industrial hygiene air monitoring. Some clients need both. We coordinate the work so the data does not have to be collected twice.
How CDMS Handles the Work
We are a California EHS consulting firm. Our consultants come to your facility. We do not ask you to come to us. The first visit covers the equipment walk, the data collection, and a clear conversation about what we can confirm on the spot and what needs to be looked up. Forms, reports, and emission calculations get prepared in our office, reviewed against the district rules, and sent back to you for signature and submittal.
When something is unclear, we say so. We do not bill for a permit application if the applicability review shows you do not need one. The two-stage path (applicability first, then application if required) is how most engagements start. For multi-permit facilities, we combine the work into a single proposal rather than charging per permit.
We have worked with California facilities since 1988. The forms, the rules, and the districts change. The work does not change much in shape: collect the data, calculate the emissions, file the paperwork, keep the record, and stay with the program from year to year.
Frequently Asked Questions
How long does it take to get an air quality permit in California?
In Southern California, new air permits typically run six to nine months from submission to issuance, driven by district review timelines. BAAQMD timelines vary by source type and complexity. We can usually have a complete application packet ready for submission much faster than the district can process it. If you have a deadline, we will tell you upfront whether it is realistic.
Do I need a permit if my facility is small?
Permit requirements are based on what you do and how much, not on facility size. A small shop with a heated chrome plating tank needs a permit. A larger distribution center with no emissions sources may not. The activity and the threshold matter more than the headcount.
What happens if I am operating equipment without a permit?
The district can require you to apply, halt the equipment, or both. Penalties depend on the district, the equipment, and how long it has been operating. The path back is the same as a regular permit application, with additional documentation for the district. Self-disclosing is usually better than waiting for an inspection to find it.
Is the Annual Emissions Report the same as AB 2588?
No. The AER covers criteria pollutants and toxic air contaminants on an annual basis. AB 2588 is the California Air Toxics “Hot Spots” program: a separate inventory of toxic emissions with periodic updates and the potential for public notification. Many facilities owe both. Our AER vs. AB 2588 vs. CTR comparison covers the differences in detail.
Do I have to file an AER if I never received a notification?
Maybe. Districts publish notification lists each year, but new regulations are expanding the universe of facilities that owe a report regardless of whether they were notified. If your operation includes paints with toxic air contaminants, plating with regulated metals, or other listed activities, you may owe a report even without a letter. We can check your facility against the criteria.
What is the difference between an air quality permit and an industrial hygiene air monitoring report?
The air district permit covers what your equipment emits to the outside air. Industrial hygiene air monitoring covers what your employees breathe inside the building. The first is regulated by the AQMD. The second is regulated by Cal/OSHA. Some facilities need both. They are different programs with different reports.
Working With CDMS on Air Quality Compliance
Trusted throughout California
BSY started working with CDMS last year after our in-house EHS person departed the company. CDMS reviewed our existing operational permits as well as any additional Federal, State and Local regulations that could apply and helped us to create a comprehensive compliance calendar to track regulatory deadlines and submittal due dates. The CDMS team does an excellent job of tracking everything and can be relied upon to complete the forms accurately and assist with submittals, allowing me to focus on our business.
Speak with a CDMS EHS expert
Tell us about your facility and your deadline. You’ll get a clear read on what applies and a scoped plan to handle it.