Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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Water Pollution Control Revolving Fund Engineering Services Insert

Clauses that will be incorporated into contracts for engineering services who receive financial assistance from the Ecology Water Pollution Control Revolving Fund.

https://ecology.wa.gov/water-pollution-control-revolving-fund-engineering

Water Pollution Control Revolving Fund Pre Selection Insert

Clauses that will be incorporated into equipment pre-selection contracts receiving financial assistance from the Ecology Water Pollution Control Revolving Fund.

https://ecology.wa.gov/water-pollution-control-revolving-fund-pre-selecti

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

WA DFW Request for TDG Short-term Mod

This is a letter from the WA Dept. of Fish and Wildlife requesting Ecology to adjust its total dissolved gas standards on the lower Snake and Columbia rivers.

https://ecology.wa.gov/wa-dfw-request-for-tdg-short-term-mod

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

Vessel Desconstruction Permit

This permit defines requirements for pollution prevention during the dismantling of vessels.

https://ecology.wa.gov/vesseldeconstructionpermit

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

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

Watcom Clean Water Map

This map shows the Watcom Clean Water Program Area

https://ecology.wa.gov/watcom-clean-water-map

Washington State Marinas with Marine Oil Recycling

Find a local marina with oil recycling for your boat fuel

https://ecology.wa.gov/washington-state-marinas-with-marine-oil-recycling

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

WACA appeal 2016

WA Aggregates & Concrete Association appeal of Sand & Gravel General Permit in 2016

https://ecology.wa.gov/wacaappeal2016

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

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