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State Environmental Policy Act (SEPA) Register
This dataset contains a list of SEPA and NEPA records posted by the Department of Ecology since 2000. -
Integrated Site Information System(ISIS) Website - (Cleanup Site &...
This is a link to the ISIS database at Washington Department of Ecology - Toxics Cleanup Program. The ISIS Web reporting portal provides a selection of standard reports for... -
Municipal Stormwater Permit Outfall Data
Special Condition S8.D of the 2007-2012 Phase I Municipal Stormwater Permit required permittees to collect and analyze data to evaluate pollutant loadings of stormwater... -
Testing View Settings 1
Special Condition S8.D of the 2007-2012 Phase I Municipal Stormwater Permit required permittees to collect and analyze data to evaluate pollutant loadings of stormwater... -
Western Washington Hydrology Model (WWHM)
This dataset includes versions of the WWHM as they are released, including installation files and descriptions of changes along with dates and version numbers. -
2016 Residential Sewer Rate Survey (To Be Retired)
This asset is slated to be retired after August 16, 2025. The survey includes monthly sewer rates per “equivalent residential unit” (ERU)* served by municipal wastewater... -
Summer Low Flow Indicator 1975-2017
Summer Low Flow Trend Indicator results, statewide, updated through Oct 2017. This information is updated annually with an additional year of flow data. These results are... -
2017 Greenhouse Gas Report Facility Data
The map contains greenhouse gas (GHG) data reported to Ecology as of December 15, 2018. The reported emissions are preliminary and have not been fully verified by Ecology. This... -
WA GHG Reporting Multi-Year Dataset
This dataset contains data reported to Ecology as of December 15, 2018. The reported emissions are preliminary and have not been fully verified by Ecology. This information is... -
GHG Reporting Program Publication
This dataset contains data reported to Ecology as of January 24, 2025. This dataset contains both reported and covered emissions. Some of these emissions have been third-party... -
GHG Reporting Program Map
This dataset contains data reported to Ecology as of January 24, 2025. This dataset contains both reported and covered emissions. Some of these emissions have been third-party... -
GHG Reporting Program Chart by Year
This dataset contains data reported to Ecology as of January 24, 2025. This dataset contains both reported and covered emissions. Some of these emissions have been third-party... -
GHG Reporting Program Pie by Sector
This dataset contains data reported to Ecology as of January 24, 2025. This dataset contains both reported and covered emissions. Some of these emissions have been third-party... -
GHG Reporting Program Reporter Emissions
This dataset contains data reported to Ecology as of November 29, 2023. The reported emissions are preliminary and have not been fully verified by Ecology. This information is... -
Total Emissions by Reporter (Excluding Biogenic CO2)
This dataset contains data reported to Ecology as of November 29, 2023. The reported emissions are preliminary and have not been fully verified by Ecology. This information is... -
GHG Reporting Program Chart by Year (Excluding Biogenic CO2)
This dataset contains data reported to Ecology as of November 29, 2023. The reported emissions are preliminary and have not been fully verified by Ecology. This information is... -
Washington State Air Quality
The links on this page provide access to the Washington State Department of Ecology's Air Monitoring Network, which tracks various air pollutants at more than six dozen sites...