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Air Quality Program

Air Operating Permits Register EntriesA photograph of the Columbia River Gourge.

The Permit Register includes all actions the permitting authority takes on a facility's permit application. These actions may include completion of the draft and final permit, the scheduling of hearings and public meetings, and modifications to the permit. The Permit Register also informs the public about how to be involved in the operating permit process.

Ecology issues a new Permit Register on the 10th and 25th of each month, or the nearest date, when there are entries.

Please submit your Air Operating Permit Register Entry Electronically.

To be placed on an electronic mailing list notifying you of register entries, please email your email address. Enter "AOP" in the subject line of the email.


2014 Permit Register Entries

  • April 10, 2014 - Volume 15, Number 7
  • March 25, 2014 - Volume 15, Number 6
  • March 10, 2014 - Volume 15, Number 5
  • February 25, 2014 - Volume 15, Number 4
  • February 10, 2014 - Volume 15, Number 3
  • January 24, 2014 - Volume 15, Number 2
  • January 10, 2014 - Volume 15, Number 1
  • 2013 Permit Register Entries


    What is an Air Operating Permit?

    An Air Operating Permit combines in one document all the operational and procedural requirements, emission standards and other requirements for facilities of a certain size that release air pollution.

    A facility is required to obtain an Air Operating Permit if it has the potential to emit any of the following:

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

    If a facility has the potential to emit these amounts, but actually emits less, its operator/owner can ask to be authorized to operate without an air operating permit. Local and state air pollution control requirements will still apply. This action will be included in the Permit Register.

    Facilities that have the potential to emit more than the thresholds for major source status, but actually emit less, can ask for and receive a legal order from the permitting authority. The order will place limits on the operation of the facility and the emissions will be limited to below the thresholds. Examples of limitations could be: limits on the hours of operation, limits on types of solvents allowed at a facility, requirements to install and use the latest air pollution control device, or changes in fuel makeup in order to be considered synthetic minor sources.

    The U.S. Environmental Protection Agency has authorized Ecology and local air authorities to administer the Air Operating Permit Program. Either Ecology or a local agency writes the permits. For more information about an individual permit action found in the Permit Register, contact the appropriate local air authority or Ecology regional office.


    Previous Registers

    For older register entries please email me your request, we have historical records from 1996.

    PDF forms and other type documents may require one of these free readers.

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