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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Aquatic Mosquito Control General Permit areas of restricted larvicide and adulticide use

Areas of restricted larvicide and adulticide use for Aquatic Mosquito Control General Permit.

https://ecology.wa.gov/03042015esalocations

Aquatic Mosquito Control General Permit Fact Sheet

Fact Sheet for the Aquatic Mosquito Control General Permit.

https://ecology.wa.gov/03042015factsheet

Aquatic Mosquito Control General Permit application (Notice of intent)

Application (Notice of intent) for the Aquatic Mosquito Control General Permit

https://ecology.wa.gov/03042015noi

Aquatic Mosquito Control General Permit SEPA checklist

SEPA checklist for the Aquatic Mosquito Control General Permit

https://ecology.wa.gov/03042015sepachecklistt

Aquatic Mosquito Control General Permit SEPA determination of non-significance

SEPA DNS (determination of non-significance) for the Aquatic Mosquito Control General Permit

https://ecology.wa.gov/03042015sepadns

Presentation slides (WAC 173-323) 8/7/17

August 7, 2017 Presentation slides for Chapter 173-323 rulemaking.

https://ecology.wa.gov/presentation-slides-wac-173-323

Aquatic Mosquito Control General Permit SEPA final determination of non-significance

Final SEPA determination of non-significance for the Aquatic Mosquito Control General Permit.

https://ecology.wa.gov/05112015sepadnsfinalrev

Draft Zostera japonica Management General Permit application (Notice of intent)

Draft Zostera japonica Management General Permit Notice of Intent (NOI)

https://ecology.wa.gov/01022014draftzjnoi

Public meeting powerpoint for webinar at Ecology on MS4 reissuance

Powerpoint for public meeting in October 2017 of Reissuance of Phase I &Western Washington Phase II Municipal Stormwater Permits.

https://ecology.wa.gov/10-12-17prelimdraft_webinarfinal

Agenda for Introduction to the Preliminary Drafts of the Phase I and Western Washington Phase II Municipal Stormwater Permits.

This is an agenda of a meeting presenting preliminary draft sections of the Permits and the Stormwater Management Manual for Western Washington.

https://ecology.wa.gov/10-12-17pubmtgagenda

Zostera japonica Management General Permit Fact sheet

Draft detailed explanation of Zostera japonica Management General Permit.

https://ecology.wa.gov/01022014zjdraftfactsheet

Errata sheet for the Zostera japonica Management FEIS

2014 Corrections and Clarifications on the Zostera japonica Management General Permit.

https://ecology.wa.gov/03282014zjfeiserrata

Phase II only S5.C.X Source Control

Western WA Phase II Municipal Stormwater Permit Preliminary Draft Permit Section: Source Control S5.C.X (proposed new section to add).

https://ecology.wa.gov/10-3-17_prelimsourcecontrolfinal

Municipal Stormwater Phase II Permit S5.C.1 Education and Outreach permit section preliminary draft

Public Education and Outreach (Phase II) Preliminary draft “fact sheet” and permit language.

https://ecology.wa.gov/10-3-17prelim_phi_ed_o

Municipal Stormwater Phase I Permit S5.C.10 Education and Outreach permit section preliminary draft

Public Education and Outreach (Phase I) Preliminary draft “fact sheet” and permit language.

https://ecology.wa.gov/10-3-17prelim_phi_ed_o-1

S5.C.4/S5.C.5 Controlling Runoff – site and subdivision scale

2019 Western Washington Municipal Stormwater preliminary draft permit language for S5.C.4/S5.C.5 Controlling Runoff – site and subdivision scale.

https://ecology.wa.gov/10-3-17prelimcontrollingrunoff

Publication: Criteria for Sewage Works Design (Orange Book)

A guide for the design of sewage collection, treatment, and reclamation systems, for municipal wastewater collection and treatment facilities.

https://ecology.wa.gov/publication-criteria-for-sewage-works-design-orange-book

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

Online tool: Emergence guidance for stormwater management

Guidance in the 2024 Stormwater Management Manual for Western Washington

https://ecology.wa.gov/online-tool-emergence-guidance-for-stormwater-management

Publication: Stormwater treatment of tire contaminants – best management practices effectiveness

Study assessing which stormwater best management practices (BMPs) are expected to reduce concentrations of 6PPD and 6PPD-q in stormwater.

https://ecology.wa.gov/publication-stormwater-treatment-of-tire-contaminants-best-management-practices-effectiveness