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.

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Rulemaking Proposal Extension (WAC 173-201A) 7/11/24

This is a rulemaking proposal extension (CR-102 C) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-extension-wac-173-201a-7-11-24

Ecology Water Quality Stormwater Grants of Regional or Statewide Significance (GROSS) Program Guidance

Guidance for applying for Ecology Water Quality Stormwater Grants of Regional or Statewide Significance (GROSS) grants

https://ecology.wa.gov/stormwater-gross-grants-prgm-guidance

Field Nutrient Budget Template

Template for submitting CAFO annual reports

https://ecology.wa.gov/field-nutrient-budget-template

Soos Creek SAP Appendix 1: 7-DADMAX thermal record graphs

7-DADMAX thermal record graphs for Soos Creek Watershed Temperature and DO TMDL Study and Analysis Plan, Appendix 1

https://ecology.wa.gov/soos-creek-sap-appendix-1-7-dadmax-thermal-record

Wastewater Treatment Plant Award Recipients

Current Year Wastewater Treatment Plant Award Recipients

https://ecology.wa.gov/wwtp-award-list

Rulemaking Proposal (WAC 173-201A) 09/17/2024

This is a rulemaking proposal (CR-102) for Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-09-17-2024

ACO StormBrixx approval letter

ACO StormBrixx Geocellular system is approved for stormwater detention storage.

https://ecology.wa.gov/aco-stormbrixx-approval-letter

Perry Pallet Functional Equivalent

Ecology finds Perry Pallet Mulch functionally equivalent to BMP C121 Mulching and BMP C235 Wattles.

https://ecology.wa.gov/perry-pallet

StrataCell and StrataVault Functional Equivalencies

Ecology finds the StrataCell and StrataVault systems are functionally equivalent to a bioretention facility when used for treating stormwater.

https://ecology.wa.gov/stratacell

Adopted Rule Language (WAC 173-201A) 11/14/24

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-11-14-24

Rulemaking Adoption Notice (WAC 173-201A) 11/14/24

This is a rulemaking adoption (CR-103) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-201a-11-14-24

Rulemaking Adoption Notice (WAC 173-201A) 11/27/24

This is a rulemaking adoption (CR-103) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-201a-2024

Source Control Inspection Program Guidance Manual

Manual from the Washington Stormwater Center provides resources, templates, and strategies developed based on research, input, and experiences of jurisdictions that have developed similar programs.

https://ecology.wa.gov/source-control-inspection-program-guidance-manual

River and stream flow monitoring

We report the amount of water flowing through Washington’s rivers and streams using graphs and maps.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/flow-monitoring

Rivers & streams temperature monitoring

We collect data on the temperature of rivers and streams across the state.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/temperature-monitoring

Watershed health — Lower Columbia update

River and stream habitats in the Lower Columbia Region show some slight downward trends.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/regional-reports/lower-columbia

Watershed health — Coastal Region update

River and stream habitat in the Coastal Region may show some improvements, but changes are slight.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/regional-reports/coastal

Watershed health — Mid-Columbia update

River and stream habitat in the Mid-Columbia Region shows slight improvement.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/regional-reports/mid-columbia

Watershed health — Puget Sound Region update

River and stream habitat in the Puget Sound Region shows variable conditions.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/regional-reports/puget-sound

Sprague Lake Community Mtg

Sprague Lake Hydrology Analysis Community Kick-Off Meeting November 22, 2022

https://ecology.wa.gov/sprague-lake