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The Northwest Clean Air Agency takes an active role in making information available to the public. Please browse through our offered resources below including publications, projects and regulations.

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Projects and Resources

  • Greenhouse Gas Reduction

    We are committed to supporting and carrying out local, state, and federal policies and efforts to curb the human contribution of greenhouse gases to the environment. As part of those efforts, we are investing $4.7 million in local environmental projects.

  • Indoor Air Quality

    Compiled information and tips into this online resource to help you keep your indoor air clean and healthy.

  • Columbia Valley Air Quality Improvement Project

    We are active participants in this community-led effort to improve air quality by reducing wood smoke in Columbia Valley.


Click on the Regulation Sections to view listings of subsections. A link to a downloadable PDF version of the complete NWCAA Regulation is available on the bottom right. Refer to this official, legal version of the regulation in case of a discrepancy with website postings.

  • Section 100:

    Name of Agency

  • Section 200:


  • Section 300:

    New Source Review

  • Section 400:

    Ambient Air Standards

  • Section 502 - 540:

    Regulated Activities and Prohibitions

  • Section 550 - 590:

    Regulated Activities and Prohibitions

  • Section 600:

    Objectives and Planning Criteria

  • Appendix:

    Appendix A: Ambient Monitoring, Emission Testing, And Continuous Emission and Opacity Monitoring

NWCAA Regulation