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About Us

Research & Data

Ecology provides the high-quality science that is the 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. We provide access to that data through reports, databases, maps and user-friendly online tools.

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State agency greenhouse gas reports
Washington state agencies are tracking, reporting, and reducing their greenhouse gases.
Washington's Air Quality Monitoring Network
Map-based tool providing near real-time air quality information to protect health. It's used to determine if air quality meets health-based federal standards.
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
480 results 1 - 20 of 480   Next page