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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TMDL Surrogates White Paper

This is a white paper that discusses the use of surrogates in Total Maximum Daily Load (TMDL) water cleanup plans.

https://ecology.wa.gov/tmdl-surrogates-white-paper

TDG Draft EIS and Short-term Modification Language February 2019 Hearing Presentations

This is a PDF of the PowerPoint presentations provided at the February 2019 hearings on the draft EIS and short-term modification language for total dissolved gas criteria in WAC 173-201A.

https://ecology.wa.gov/tdg-draft-eis-and-short-term-modification-language

TDG short term modification administrative order

Signed short term modification administrative order for total dissolved gas criteria

https://ecology.wa.gov/tdg-short-term-modification-administrative-order

TMDL Prioritizaiton Issue Paper for WQ Assessment Policy 1-11

Policy 1-11 Public Dialogue TMDL Prioritization Issues Paper

https://ecology.wa.gov/tmdlprioritizaitonissuepaperpolicy1-11

Stormwater Manual Update Agenda

Meeting agenda to help improve the manuals.

https://ecology.wa.gov/swm-agenda

Table 602 and Table 612 with track changes (WAC 173-201A) 07/17/18

This is a supporting document showing the proposed edits to Chapter 173-201A WAC Table 602 and Table 612 in track changes.

https://ecology.wa.gov/table-602-and-table-612-with-track-changes-wac-17

Boatyard general permit SWPPP template

Example template of a Stormwater Pollution Prevention Plan (2012) This template was prepared by the Northwest Marine Trade Association (NMTA) for use by its boatyard members. NMTA has granted the Department of Ecology permission to make this form available to all interested parties.

https://ecology.wa.gov/swppptemplate

Boatyard general permit SWPPP Worksheets

Examples of Stormwater Pollution Plan Worksheets (2007)

https://ecology.wa.gov/swpppworksheets

Stormwater Manual Handout

Redevelopment handout for the manual improvement meeting.

https://ecology.wa.gov/swm-handout-1

Stormwater Manual Handout 2

Flow chart for stormwater manual improvement.

https://ecology.wa.gov/swm-handout-2

Stormwater Manual power point

This presentation shows intended improvements for the manual.

https://ecology.wa.gov/swm-powerpoint

SWMMEW Winter Newsletter 2018-19

This newsletter gives a description of the Stormwater Management Manual Update for Eastern WA and describes the major changes.

https://ecology.wa.gov/swmmew-winter-newsletter

TerraMod Planter Box

Determined to be functionally equivalent to a Bioretention Planter or Planter Box

https://ecology.wa.gov/terramod-planter-box

Tigerfloc Functional Equivalency

Ecology finds Tigerfloc functionally equivalent to the flocculent chemicals identified in Best Management Practice C250 (Construction Stormwater Chemical Treatment) for stormwater management. Contractors may use Tigerfloc as a replacement for other approved chemicals such as ChitoSan Acetate when operating an enhanced sand filtration system on construction sites.

https://ecology.wa.gov/tigerflockfunctionallyequivalent

ToriShell Equivalent letter

Ecology finds ToriShell functionally equivalent to C126 Polyacrylamide for soil erosion and dust control.

https://ecology.wa.gov/tortishell

Timelines for continuing permittees

Timelines for continuing Western Washington Phase II Municipal Stormwater Permittees

https://ecology.wa.gov/timelinephase2continuing

Timelines for new permittees

Timelines for new Western Washington Phase II Municipal Stormwater Permittees

https://ecology.wa.gov/timelinephase2new

SWPPP CSWGP

Word document template for creating a stormwater pollution prevention plan (SWPPP)

https://ecology.wa.gov/new-swppp

2017 Annual Report for Taylor Shellfish

This annual report reviews Zostera Japonica controls on commercial clam beds in Willapa Bay for Taylor Shellfish.

https://ecology.wa.gov/taylor-3005-annual-report

2018 pretreatment plan for Taylor

Annual pre-treatment plan for Zostera japonica control on commercial clam beds in Willapa Bay for Tylor Shellfish

https://ecology.wa.gov/taylor-pretreatment-plan