Air operating permit for large sources of air pollution

Commercial and industrial businesses that emit large amounts of air pollution must get an air operating permit. An air operating permit is a master document that lists all of the air pollution requirements that apply to a business or industry. We issue these permits along with other clean air agencies in Washington.

Apply for an air operating permit

A business must turn in an air operating permit application 12 months before it has the potential to emit:

  • More than 100 tons per year of any air pollutant.
  • More than 10 tons per year of any hazardous air pollutant.
  • More than 25 tons per year of a combination of hazardous air pollutants.

Even if a business emits less than these amounts, EPA may decide that it still needs an air operating permit.

The federal rules that might apply include:

An air operating permit is valid for 5 years. A business must apply for renewal 6-18 months before the current permit expires.

Agencies that issue air operating permits

Agencies that issue air operating permits include:

Permit Register

Twice a month, we publish a Permit Register that lists milestones for air operating permits.

Review a draft air operating permit

Check for a public comment period and review a draft air operating permit:

Budget and fees

Every two years, we prepare a workload model and a budget projection that evaluates the cost of reviewing, tracking, and overseeing air operating permits. After the public comment period, we finalize the workload analysis and budget. The most recent reports:

At the end of each fiscal year (July 1 – June 30), we prepare an annual report summarizing air operating permit program work and fees.

We publish the current fiscal year’s fee schedule every year by Oct. 31.


Audits

Ecology and outside agencies regularly audit the air operating permit program.