Event detail icon
Comment Period

State Implementation Plan (SIP) revision

Infrastructure SIP for 2015 Ozone and 2010 Sulfur Dioxide, Appendices A and K

Jan. 31, 2020 - March 15, 2020, 11:59 p.m.

Ecology proposes to submit a revised State Implementation Plan (SIP) to EPA.

This proposed plan shows Washington's ability to reach, maintain, enforce, and carry out national air quality standards for 2015 ozone and 2010 sulfur dioxide through infrastructure.  We have updated Appendices A and K to the revised plan.   Español (Spanish)

Documents for review:

Appendix A
Appendix K

Tentative public hearing:  (must request a public hearing by March 3, 2020)
  March 10, 2020, 10 a.m.
  Ecology – 300 Desmond Drive SE, Lacey (map to location)

You can request a public hearing using the online comment form linked below. If we do not get a request for a public hearing, we will cancel it and update this page.



State Implementation Plan (SIP) is a general air cleanup plan.  It describes how Washington carries out, maintains, and enforces national air quality standards.

The State Implementation Plan explains how Washington will lower air pollution from sources like transportation, wood smoke, and industry. Sections of the plan are customized to meet regional air quality needs.

Comment online icon

Comment online

Comment by mail icon

Comment by mail

Jacob Berkey
Washington State Department of Ecology
Air Quality Program
P.O. Box 47600
Olympia, WA 98504-7600
Questions icon


Jacob Berkey
Environmental Planner

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.