Division of Air Quality Monitoring and Quality Assurance

Exceptional Events

DEC requests exceptional event waivers from EPA to exclude elevated PM_2.5 concentrations caused by wildland fire emissions from federal regulatory decision-making processes under 319(b)(3)(B) of the Clean Air Act. EPA defines exceptional events as unusual or naturally occurring events that can affect air quality but are not reasonably controllable using techniques that tribal, state or local air agencies may implement in order to attain and maintain the National Ambient Air Quality Standards.

2022/2023 Exceptional Events Waiver Documents

• 2022/2023 Exceptional Events Waiver - Final (PDF)
• 2022/2023 Appendix A Table 11 Low Fire Year Summer Mean
• 2022/2023 Appendix B Air Quality Advisories (PDF)
• 2022/2023 Appendix C 2022 Daily Data
• 2022/2023 Appendix D 2023 Daily Data
• 2022/2023 Appendix E Fuels Fire Behavior Advisories
• 2022/2023 Appendix F AICC Reports

All Exceptional Events