Research & Data

Ecology provides the high-quality science that is microscope iconthe foundation of Washington state environmental policy.

Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water.

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Research & Data

Ecology provides the high-quality science that is microscope iconthe foundation of Washington state environmental policy.

Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water.

See more about this collection...
Air quality studies
Information about air quality studies we conduct.
Comments from the regulated entities and associations (WAC 173-442; WAC 173-441) 07/22/16
These are comments from the regulated entities and associations.
Rulemaking proposal language for (WAC 173-442)
This is proposed rule language for WAC 173-442.
Rulemaking proposed language (WAC 173-441) 05/31/16
This is proposed rule language for WAC 173-441.
Unofficial rule language - readable format (WAC 173-442) 05/31/16
This is Unofficial rule language - readable format for WAC 173-442.
SEPA determination of non-significance and addendum (WAC 173-442; WAC 173-441) 09/15/16
This is the SEPA determination of non-significance and addendum for WAC 173-442 and WAC 173-441
Secondary economic impacts analysis (REMI) (WAC 173-442; WAC 173-441) 09/15/16
This is the secondary economic impacts analysis (REMI) for WAC 173-442 and WAC 173-441.
SEPA determination of non-significance (WAC 173-442; WAC 173-441) 01/05/16
This is the SEPA determination of non-significance for WAC 173-442 and WAC 173-441
SEPA checklist, including a staff report - non-project review form (WAC 173-442; WAC 173-441) 01/05/
This is the SEPA checklist for WAC 173-442 Clean Air Rule and WAC 173-441Reporting of Emissions of Greenhouse Gases rulemaking.
Rulemaking Announcement (WAC 173-442; WAC 173-441) 09/21/15
This is a rulemaking announcement for WAC 173-442 Clean Air Rule; WAC 173-441 Reporting of Emissions of Greenhouse Gases.
Rulemaking Proposal (WAC 173-422 and WAC 173-441) 01/05/16
This is a rulemaking proposal (CR-102) for WAC 173-422 and WAC 173-441.
Rulemaking proposal (WAC 173-442; WAC 173-441) 05/31/16
This is a rulemaking proposal (CR-102) for WAC 173-442 Clean Air Rule; WAC 173-441 Reporting of Emissions of Greenhouse Gases
Rulemaking proposal language for (WAC 173-441) 05/18/16
This is proposed rule language for WAC 173-441, Reporting of Emissions of Greenhouse Gases
Rulemaking proposal language for (WAC 173-442) 05/18/16
This is proposed rule language for WAC 173-442 Clean Air Rule.
Adopted rule language for (WAC 173-442) 09/21/16
This is adopted rule language for WAC 173-442 Clean Air Rule.
Adopted rule language for (WAC 173-441) 09/15/16
This is adopted rule language for WAC 173-441 Reporting of Emissions of Greenhouse Gases.
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