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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Design requirements for infiltration trenches

Design requirements for infiltration trenches with soils considered a treatment BMP

https://ecology.wa.gov/infiltration-trench-guidance

HHC Statement 070221

This statement given July 2, 2021 is about the EPA motion on the Human Health Criteria for Washington

https://ecology.wa.gov/hhc-statement-070221

Director Bellon Letter to Admin. Wheeler about HHC proposal

This is a letter requesting the EPA hold consultation with Ecology on the Human Heath Criteria upcoming proposed EPA rule.

https://ecology.wa.gov/hhc_hearings_letter_wheeler

Human Health Criteria Alternatives

Water Quality Policy 1-11 Updates to Human Health Criteria February 2017

https://ecology.wa.gov/hhc_alternatives020217

Water Quality Assessment/Policy 1-11 Updates Human Health Criteria Alternatives

Proposed Human Health Criteria Alternatives by Ecology March 2017

https://ecology.wa.gov/hhc-tissuealternative_032017

Policy 1-11 Public Dialogue Listings based on Human Health Criteria December 2016

This is a 2017 issue paper about tissue regarding the Water Quality Assessment/Policy 1-11 Updates Human Health Criteria Alternatives

https://ecology.wa.gov/hhctissueissuepaperpolicy1-11

Industrial Stormwater General Permit Frequently Asked Questions

This FAQ outlines questions and answers that Industrial Stormwater General Permit holders may find helpful. This document is intended as guidance only, and does not modify or otherwise change the permit requirements in the Industrial Stormwater General Permit.

https://ecology.wa.gov/industrial-stormwater-general-permit-faq

Industrial Stormwater Monthly Site Inspection Form

Use this form for your monthly inspections if you are industrial stormwater permit holder. Inspections must be conducted by a person with the knowledge and skills to assess conditions and activities that could impact stormwater quality at the facility, and evaluate the effectiveness of best management practices required by this permit. Retain a copy of the completed and signed form.

https://ecology.wa.gov/industrial-stormwater-monthly-site-inspection-form

Hydro Battery Pearl Hill Water Quality Certification application & public notice

Application for State of Washington water quality certification for Hydro Battery Pearl Hill.

https://ecology.wa.gov/hydro-battery-pearl-hill-wqc-application-public

Hydro Bioinfiltrator Equivalent

Ecology finds Hydro Bioinfiltrator functionally equivalent to a bioretention planter or planter box.

https://ecology.wa.gov/hydro-bioinfiltrator

Instream assessment of biota and migration patterns final report

Study of aquatic life and migration patterns in the Palouse River.

https://ecology.wa.gov/instream-assessment-of-biota-and-migration-pat-1

Industrial Stormwater General Permit

We issued the Industrial Stormwater General Permit in 2014. This is a National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit for stormwater discharges associated with industrial activities.

https://ecology.wa.gov/industrialstormwatergeneralpermit

Hull Cleaning Advisory flyer

Use this guidance poster to encourage boatyard cleaning instead of underwater cleaning of boats.

https://ecology.wa.gov/hull-cleaning-advisory-flyer

CSWGP High Turbidity/Low Transparency Reporting

Sites covered under the Construction Stormwater General Permit (Permit) must take specific reporting and adaptive management actions in order to comply with permit requirements when obtaining high turbidity results (greater than or equal to 250 Nephelometric Turbidity Units (NTUs)) or low transparency results (less than or equal to 6 centimeters).

https://ecology.wa.gov/highturbidity

CSWGP Site Inspection Form

All Permittees must inspect the construction site and monitor water discharging from the construction site. Inspections must be summarized in an Inspection Report or Checklist and kept with the Site Log Book. These requirements are listed in the CSWGP - S4. Monitoring Requirements, Benchmarks and Reporting Triggers.

https://ecology.wa.gov/inspectionform

2017 Annual Report for Herrold Fish & Oyster

Annual report reviews Zostera Japonica controls on commercial clam beds in Willapa Bay for Herrold Fish & Oyster.

https://ecology.wa.gov/herrold-3009-annual-report

2018 Pretreatment Plan for Herrold

2018 pretreatment plans on control for commercial clam beds in Willapa Bay for Herrold.

https://ecology.wa.gov/herrold-2018-pretreatment-plan