Water Quality photo identifier

Water Quality Program

Construction Stormwater General Permit

Construction site operators are required to be covered by a Construction Stormwater General Permit if they are engaged in clearing, grading, and excavating activities that disturb one or more acres and discharge stormwater to surface waters of the state. Smaller sites may also require coverage if they are part of a larger common plan of development that will ultimately disturb one acre or more. Operators of regulated construction sites are required to:

  1. Develop stormwater pollution prevention plans.
  2. Implement sediment, erosion, and pollution prevention control measures.
  3. Obtain coverage under this permit.

The current Construction Stormwater General Permit (CSWGP) will expire December 31, 2015. Ecology plans to issue the new CSWGP in November 2015 with an effective date of January 1, 2016. All Permittees must reapply per Section G8 of the current permit. Reapplication Instructions and Information

Proposed Permit Documents

Current Permit Documents

Draft Permit Public Involvement

Public Comment Period July 1 - August 10, 2015

Ecology will consider all public comments before issuing the final CSWGP in December 2015, with an effective date of January 1, 2016. Written comments must be postmarked or received via email no later than August 10, 2015.

Ecology will host six public workshops to explain proposed changes to the CSWGP and answer questions. A public hearing will follow the workshop at University Place in Pierce County, allowing interested parties to provide oral testimony on the draft CSWGP.

Ecology prefers comments be submitted by email to: cswgpcomments@ecy.wa.gov

Submit written hard copy comments to:

Amy Moon
Water Quality Program
Department of Ecology
PO Box 47696
Olympia, WA 98504-7696




Mailed reapplication instructions to existing Permittees

April 2015

Renewal application due date July 3, 2015 (180 days prior to expiration). Internet based application.

Publish Draft Permit and Fact Sheet

July 1, 2015

Begin Public Comment Period for Draft CSWGP. ~40 days
Send comments to: cswgpcomments@ecy.wa.gov

Public Workshops

July 14, 2015 1p.m.

Water Resources Education Center 4600 SE Columbia Way
Vancouver, WA 98661
(360) 497-7111

July 16, 2015, 1 p.m.
Mount Vernon

Skagit Station
105 E. Kincaid
Mount Vernon, WA 98273
(360) 757-4433

July 21, 2015, 1 p.m.
Moses Lake

Moses Lake Fire Station
701 E Third Avenue
Moses Lake, WA 98837
(509) 765-2204

July 29, 2015, 1 p.m.

South Seattle Community College
Georgetown Campus / C122
6737 Corson Avenue S.
Seattle, WA  98102
(206) 934-5350

July 30, 2015, 1 p.m.
online webinar
website link
Click "More Information" for meeting info and call-in options
August 5, 2015, 1 p.m.
University Place

Workshops and Hearing
Pierce County Environmental Services Building
9850 64th Street W.
University Place, WA  98467
(253) 798-4047
Public Hearing August 5, 2015

Directly following the 1 p.m. Workshop
Pierce County Environmental Services Building 9850 64th Street W.
University Place, WA  98467
(253) 798-4047

Permit Reapplications Due

July 3, 2015

Due 180 days prior to expiration of permit.

Close Public Comment Period

August 10, 2015

Public Comments must be postmarked or emailed by midnight.

Issue Final Permit

November 18, 2015

Copies mailed to all permit holders.

Final Permit Effective

January 1, 2016

Old permit expires, new permit is effective.

Note: dates/locations subject to change. Visit our CSWGP webpage for the most up to date information.


Contact Us - Contact your Permit Administrator for permit assistance or your Regional Office for site specific questions.

Permit, Forms and Application - Permit, application, forms, and appeal information.

High Turbidity Reporting - Construction projects must report high stormwater turbidity results within 24 hours. If you get a high result, call your Ecology regional office.

Resources and Guidance - DMRs, Stormwater monitoring, manuals, 303(d) list information, CESCL.

Historical Information - Pollution Control Hearing Board information, public comments.

Get Ecology updates about the Construction Stormwater General Permit - Sign up for the Construction Stormwater General Permit email listserv


It’s Time to Reapply
All Permittees must reapply by July 3, 2015. Permittees can now reapply online.

Erosivity Waiver Calculator

Construction Stormwater Site Inspection Form

Online Application (eNOI) Now Available

Sampling Frequently Asked Questions

Construction Stormwater General Permit Application Status - Check the status of your application.

Stormwater Pollution Prevention Plan Template - To use this template, save to your computer.

Sign up for the Construction Stormwater General Permit email list