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.
Water Pollution Control Revolving Fund Specifications Insert
For construction contracts - clauses that will be incorporated into contracts receiving financial assistance from the Ecology Water Pollution Control Revolving Fund.
https://ecology.wa.gov/water-pollution-control-revolving-fund-specificati
Water Quality Financial Assistance Standard Contract Clauses
ECOLOGY grant/loan acknowledgment clause
https://ecology.wa.gov/water-quality-financial-assistance-standard-contra
Water Quality Trading White Paper
This is a white paper that discusses using water quality trading
https://ecology.wa.gov/water-quality-trading-white-paper
Western WA O&M Worksheet
Use this worksheet as a guide for interviewing MS4 staff and reviewing applicable documents.
https://ecology.wa.gov/western-wa-o-m-worksheet
Western WA IDDE Worksheet
Use this worksheet as a guide for interviewing MS4 staff and reviewing applicable documents.
https://ecology.wa.gov/western-wa-idde-worksheet
Water Treatment Plant General Permit 2014
This is the 2014 Water Treatment Plant General Permit.
https://ecology.wa.gov/water-treatment-plant-general-permit-2014
Water Treatment Plant General Permit 2014 Fact Sheet
This is the Water Treatment Plant General Permit 2014 Fact Sheet.
https://ecology.wa.gov/water-treatment-plant-general-permit-2014-fact-she
Winery Permit Preliminary Draft
This is the 2017 Preliminary Draft of the Winery General Permit for Washington state.
https://ecology.wa.gov/winery-permit-preliminary-draft
Winery Permit Preliminary Draft Fact Sheet
This is the fact sheet for the 2017 Preliminary Draft of the Winery General Permit for Washington state.
https://ecology.wa.gov/winery-permit-preliminary-draft-fact-sheet
Whatcom County enforcement process
TMDL enforcement process for Whatcom County and city of Bellingham
https://ecology.wa.gov/whatcomcntytmdlenforcementprocesssubmit
Wetland Mod System
Ecology finds the Bio Clean Wetland Mod system is functionally equivalent to a bioretention facility when used for treating stormwater.
https://ecology.wa.gov/wetland-mod-system
Wet Sep
Letter showing Wet Sep functional equivalence.
https://ecology.wa.gov/wetsepfunctionallyequivalent
WDFWTimingTable18Feb2016
This table provides WDFW recommended treatment windows for aquatic herbicide treatment. These windows are designed to avoid adverse impacts to Priority Species (federal- and state-listed and other sensitive and vulnerable species).
https://ecology.wa.gov/wdfwtiming-table
WGHOGA letter on NPDES permit application
Burrowing shrimp document: WGHOGA letter on NPDES permit application
https://ecology.wa.gov/wghoga-letter-on-npdes-permit-application
WGHOGA Public Notice of Intent to Deny NPDES Permit letter
This document contains the letter, public notice, and description of the Intent to Deny the NPDES permit for WGHOGA
https://ecology.wa.gov/wghoga-public-notice-npdes-letter
WGHOGA transmittal letter for NPDES permit application
Burrowing shirmp document: WGHOGA transmittal letter for NPDES permit application
https://ecology.wa.gov/wghoga-transmittal-letter-for-npdes-permit-applica
2017 Annual Report for Wiegardt & Sons, Inc.
This annual report reviews Zostera Japonica controls on commercial clam beds in Willapa Bay for Wiegardt & Sons, Inc..
https://ecology.wa.gov/weigardt-3006-annual-report
2017 Annual Report for Willapa Bay Shellfish
2017 annual report for zostera japonica controls in Willapa Bay for Willapa Bay Shellfish.
https://ecology.wa.gov/willapa-3008-annual-report
2018 Pretreatment Plan Weigardt
Pretreatment plan for Zostera Japonica controls on commercial clam beds in Willapa Bay for Weigardt.
https://ecology.wa.gov/weigardt-2018-pretreatment-plan
2018 Pretreatment Plan for Willapa Bay Shellfish
Pretreatment plan for Zostera Japonica controls on commercial clam beds in Willapa Bay for Willapa Bay Shellfish.
https://ecology.wa.gov/willapa-2018-pretreatment-plan
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