Research & Data
Use this portal to filter and search for all of our scientific information.
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.
Presentation (WAC 173-424) 9-26 2024
Slideshow presentation from the Sept. 26, 2024, CFS Rulemaking Update webinar
https://ecology.wa.gov/presentation-wac-173-424-9-26-2024
Adopted rule language (WAC 173-446B)
Adopted rule language WAC 173-446B
https://ecology.wa.gov/adopted-rule-language-wac-173-446b-10-08-24
Rulemaking Adoption Notice (WAC 173-446B)
Rulemaking adoption notice WAC 173-446B
https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-446b-10-08-24
Cap-and-Invest: No-cost allowance allocation for electric utilities
Presentation of Cap-and-Invest: No-cost allowance allocation for electric utilities meeting on Oct. 16, 2024
https://ecology.wa.gov/1016124nocostallowance
Presentation (WAC 173-446) 10-21-24
This is a presentation for the October 21, 2024 public meeting for Chapter 173-446 WAC, Cap-and-invest rulemaking.
https://ecology.wa.gov/presentation-wac-173-446-11-14-23-540261c1d121085d0b0e570d950387a7
Environmental Justice Presentation (WAC 173-446) 10-21-24
This is a presentation for the October 21, 2024 Environmental Justice listening session for Chapter 173-446 WAC, Cap-and-invest rulemaking.
https://ecology.wa.gov/presentation-wac-173-446-11-14-23-540261c1d121085d0b0e570d950387a7-1ecee0d19f94900fb988911963b64367
Rulemaking Adoption Notice (WAC 173-441, 446)
Rulemaking adoption notice WAC 173-441, 446
https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-441-446-12-03-24
Adopted rule language (WAC 173-446)
Adopted rule language WAC 173-446
https://ecology.wa.gov/adopted-rule-language-wac-173-446-12-03-24
Adopted rule language (WAC 173-441)
Adopted rule language WAC 173-441
https://ecology.wa.gov/adopted-rule-language-wac-173-441-12-03-24
Rulemaking Announcement (WAC 173-423) 11-20-24
CR 101 for WAC 173-423
https://ecology.wa.gov/rulemaking-announcement-wac-173-423-11-20-24
Inslee statement on Clean Air Rule decision
Statement by Gov. Jay Inslee on 1-16-20 related to the Supreme Court ruling on the Clean Air Rule.
https://ecology.wa.gov/inslee-statement-on-clean-air-rule-decision
VW state settlement allocations
A pie chart showing how the VW state settlement funds are being used.
https://ecology.wa.gov/20200408-vwallocationscircle-alt
NOx reductions alt text document
Arrow showing past & current NOx reductions in comparison to our goal and future reductions using VW settlement funds
https://ecology.wa.gov/20200407-noxreductionsarrow-alt
CFS Draft Rule - Changes Summary
Summary of proposed changes to WAC 173-424
https://ecology.wa.gov/draft-rule-changes-summary-wac-173-424-8-30-24
Draft rule language (173-424-800 - 173-424-850)
Summary of proposed changes to WAC 173-424-800
https://ecology.wa.gov/draft-rule-language-173-424-800-173-424-850
Air quality studies
Information about air quality studies we conduct.
https://ecology.wa.gov/research-data/scientific-reports/air-quality-studies
Electric Fire Truck Grant FAQs
FAQ for electric firetruck grants
https://ecology.wa.gov/electricfiretruckgrantfaq
Watershed health sampling sites
Learn about the sites we sample.
https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/sampling-sites
Groundwater quality assessment
Our hydrogeologists monitor and assess groundwater quality and quantity in Washington.
https://ecology.wa.gov/research-data/monitoring-assessment/groundwater-quality-assessment
River and stream monitoring
Our freshwater data helps us to assure clean and abundant water to support human and aquatic life.
https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring
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