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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1885 results

10-6-19 Agency comments on federal rulemaking

This is the agency's official written comments submitted to EPA about the federal rulemaking to repeal our state water quality standards.

https://ecology.wa.gov/10-6-19-agency-comments-on-federal-rulemaking

EPA approval letter

Approval of Washington’s 2014-2018 Section 303(d) List

https://ecology.wa.gov/20220826-final-wa-2014-2018-303dlist-transmittal

2005 to 2012 SWMMWW Redlines

This shows which sections changed between the 2005 and 2012 Stormwater Management Manual for Western Washington with edits marked with redline tracked changes.

https://ecology.wa.gov/2005-2012swmmwwredlines

Historic 2010 Upland Fin-fish Hatching and Rearing General Permit

This is the 2010 general permit for upland fin-fish hatching and rearing general permit. This is a National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit for discharges to water associated with upland fin-fish hatching and rearing activities.

https://ecology.wa.gov/2010permitfinal

2012-2014 Stormwater Management Manual for Western Washington - Chart of Changes

Chart of Changes between the 2012 and 2014 SWMMWW

https://ecology.wa.gov/2012-2014-swmmww-chartofchanges

2012 Stormwater Management Manual for Western Washington revision response to comments

Response to Comments on the Draft 2012 SWMMWW

https://ecology.wa.gov/2012response

2012 to 2014 Stormwater Management Manual for Western Washington Redlines

2012 to 2014 SWMMWW track changes with redlines

https://ecology.wa.gov/2012to2014swmmwwredlines

2014 Stormwater Management Manual for Western Washington Response To Comments

Response to Comments on the Draft 2014 SWMMWW

https://ecology.wa.gov/2014responsetocomments

Aquatic Pesticide product to active ingredient conversion table

Conversion table from Aquatic Pesticide product to active ingredient.

https://ecology.wa.gov/2014conversiontable

Stormwater Control Transfer Program first draft comments

Comments on first draft guidance on a Stormwater Control Transfer Program

https://ecology.wa.gov/1st-draft-comments

2014 Response to Comments on the modification

Western Washington Phase II Municipal Stormwater Permit 2014 Response to Comments on the modification

https://ecology.wa.gov/2014responsetocomments-ea9b31d6146a8b3d83d6bf7ac8f4863f

2011 Fact Sheet Sand and Gravel General Permit

Historical document for the Sand and Gravel General Permit.

https://ecology.wa.gov/2011-fact-sheet

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

2011 to 2016 Sand and Gravel Permit comparison

This shows the changes for the 2011 to 2016 Sand and Gravel General Permit.

https://ecology.wa.gov/2011-to-2016-permit-comparrison

Construction Stormwater General Permit (2005)

2005 Construction Stormwater General Permit.

https://ecology.wa.gov/2005cswgp

Construction Stormwater General Permit Reissuance Response to Comments (2005)

2005 Construction Stormwater General Permit Reissuance Response to comments.

https://ecology.wa.gov/2005responsetocomments

2014 Annual Report

2014 Long Island Oyster Z. japonica Annual Report

https://ecology.wa.gov/2014wag993003annualrpt

2014 Pretreatment Plan

2014 Long Island Oyster Z. japonica Pretreatment Plan

https://ecology.wa.gov/2014wag993003pretrtplan