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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Monitoring & assessment
The Tri-Cities Ozone Precursor Study
A report on the ozone study conducted in the Tri-Cities area.
https://ecology.wa.gov/20171212tricitiesozoneprecursorstudy
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
2014 emissions inventory for Prevention of Significant Deterioration-permitted facilities
This is the spreadsheet of 2014 emissions inventory for facilities with a Prevention of Significant Deterioration permit.
https://ecology.wa.gov/201603prevsignificantdeteriorationinventory
Prevention of Significant Deterioration baseline emissions inventory technical support
This is the technical support document for the baseline emissions inventory for facilities with a Prevention of Significant Deterioration permit.
https://ecology.wa.gov/201603prevofsignificantdeteriorationtechsupport
2017 Greenhouse gas emissions by sector
Alt text for greenhouse gas emission by sector graphic
https://ecology.wa.gov/20200407-2017ghgemissionsbysector-alt
Dioxin Study Technical Memo
This is a PDF file that summarizes well testing results in the Lower Yakima Valley.
https://ecology.wa.gov/dioxin-study-technical-memo
Instream assessment of biota and migration patterns final report
Study of aquatic life and migration patterns in the Palouse River.
https://ecology.wa.gov/instream-assessment-of-biota-and-migration-pat-1
Instream assessment of biota and migration patterns study design
Study of aquatic life and migration patterns in the Palouse River.
https://ecology.wa.gov/instream-assessment-of-biota-and-migration-pattern
Stormwater Work Group recommendations for second round effectiveness studies
This letter from the SWG chair outlines the funding recommendations for the second round of effectiveness studies for Stormwater Action Monitoring
https://ecology.wa.gov/swg-esrecommendations06072017
Northeast West Plains PFAS in drinking water sampling results map
The EPA created this map to summarize where samples were taken without showing private well locations.
https://ecology.wa.gov/west-plains-pfas-sampling-results-map
Eyes Over Puget Sound
We provide documentation of Puget Sound waterways using community submissions and aerial photography.
https://ecology.wa.gov/research-data/monitoring-assessment/puget-sound-and-marine-monitoring/eyes-over-puget-sound
Jellyfish in Puget Sound
Jellyfish numbers may be increasing in Puget Sound. You can help us monitor them.
https://ecology.wa.gov/research-data/monitoring-assessment/puget-sound-and-marine-monitoring/jellyfish
Marine algae & plankton
Marine algae blooms are overgrowths of plankton. They can look like a spill in the water.
https://ecology.wa.gov/research-data/monitoring-assessment/puget-sound-and-marine-monitoring/marine-algae-plankton
River & stream flow monitoring methods
We measure water's width, depth, and speed in rivers and streams to compute streamflow.
https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/flow-monitoring/river-stream-flow-monitoring-methods
Water quality monitoring methods for rivers & streams
Learn how we measure water quality in rivers and streams, including methods and parameters.
https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/water-quality-monitoring/river-stream-monitoring-methods
Watershed Health Monitoring by region
We studied stream habitat across the state since 2009 and report on findings.
https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/regional-reports
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 — Unlisted Washington update
River and stream habitat in the Unlisted Region shows worsening conditions.
https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/regional-reports/unlisted
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