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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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

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

05-03-2017 PRO-C Meeting

05-03-2017 PRO-C Meeting agenda and summary

https://ecology.wa.gov/05-03-2017-pro-c-meeting-agenda-and-summary

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

Preliminary draft language for S5.C.2/S5.C.3 Mapping for MS4 permits

2019 Western Washington Municipal Stormwater Permit preliminary draft language for S5.C.2/S5.C.3 Mapping.

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

S5.C.8/S5.C.3 IDDE tracking and reporting

Preliminary draft permit section for the Phase I and Western Washington Phase II Municipal Stormwater Permit language on IDDE tracking and reporting.

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

S8. Monitoring

Proposed 2019-2024 Phase I MS4 permit language for S8. Monitoring and Assessment.

https://ecology.wa.gov/10-3-17prelims8_costappendixfinal

Vantage Data Center Health Impact Assessment (Second Tier Review) Recommendation, April 2022

This is the April 2022 Health Impact Assessment (Second Tier Review) Recommendation for Vantage Data Center.

https://ecology.wa.gov/202204vantagetier2rec