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.
Previous Permit 2014 Fact Sheet
Water Treatment Plant 2014 previous permit fact sheet.
https://ecology.wa.gov/wtp-previous-fact-sheet
Ecology Water Quality Combined Funding Program Fiscal Year 2024 List of Applicants
List of applications that applied for Ecology Water Quality Combined Funding Program grants in Fiscal Year 2024
https://ecology.wa.gov/wqc-2023-list-of-applicants
Wastewater Training sign in sheet
This is for instructors to use as a means to document student attendance.
https://ecology.wa.gov/ww-training-sign-in-sheet
Wastewater Operator Certification WAC
This is the Washington Adminstration Code that governs how we certify operators. It also shows how plants are classified at the end of the document.
https://ecology.wa.gov/ww-wac
Western Washington Phase II Municipal Stormwater Permit Appendix 1
Appendix 1. Minimum Technical Requirements or New Development and Redevelopment
https://ecology.wa.gov/wwaphaseii-app1
Western Washington Phase II Municipal Stormwater Permit Appendix 2
Appendix 2. Total Maximum Daily Load Requirements
https://ecology.wa.gov/wwaphaseii-app2
Western Washington Phase II Municipal Stormwater Permit Appendix 3
Appendix 3. Annual Report Questions for Cities, Towns and Counties
https://ecology.wa.gov/wwaphaseii-app3
Western Washington Phase II Municipal Stormwater Permit Appendix 4
Appendix 4. Annual Report Questions for Secondary Permittees
https://ecology.wa.gov/wwaphaseii-app4
Western Washington Phase II Municipal Stormwater Permit Appendix 5
Appendix 5. Notice of Intent for Coverage
https://ecology.wa.gov/wwaphaseii-app5
Western Washington Phase II Municipal Stormwater Permit Appendix 6
Appendix 6. Street Waste Disposal
https://ecology.wa.gov/wwaphaseii-app6
Western Washington Phase II Municipal Stormwater Permit Appendix 7
Appendix 7. Determining Construction Site Sediment Damage Potential
https://ecology.wa.gov/wwaphaseii-app7
Western Washington Phase II Municipal Stormwater Permit Appendix 8
Appendix 8. Annual Report Questions for New Permittees
https://ecology.wa.gov/wwaphaseii-app8
Western Washington Phase II Municipal Stormwater Permit Appendix 9
Appendix 9. Stormwater Discharge Monitoring
https://ecology.wa.gov/wwaphaseii-app9
November 11, 2011 Fact sheet
Western Washington Phase II Municipal Stormwater Permit November 11, 2011 Fact sheet
https://ecology.wa.gov/wwaphaseiifactsheetfinal
Response to comments on modified Zostera japonica Management General Permit
Modified Zostera japonica Management General Permit Response to comments.
https://ecology.wa.gov/zjpermitmodappendixd04052017
Western Washington Phase II Municipal Stormwater Permit
Current permit, effective 2013-2018, modified in 2014
https://ecology.wa.gov/wwaphaseii-permit-2014final
Zostera japonica Management General Permit
The Zostera japonica Management on Commercial Clam Beds in Willapa Bay permit is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit. It allows the use of imazamox and marker dyes on commercial clam beds (excluding geoduck), in Willapa Bay only, for control of Zostera japonica eelgrass, a Class C noxious weed.
https://ecology.wa.gov/zjpermitmodification04052017
Western Washington Municipal Stormwater Permits 2019 Permit extension guidance
Here we answer frequently asked questions about the Western Washington Municipal Stormwater Permits 2019 Permit extension.
https://ecology.wa.gov/wwapermitextensionfaqs-pdf
Wastewater Treatment Plant Award Recipients
Current Year Wastewater Treatment Plant Award Recipients
https://ecology.wa.gov/wwtp-award-list
1089 results
801 - 820 of 1089