Water Quality > Stormwater > Industrial Stormwater General Permit

Industrial Stormwater General Permit

Ecology has issued a final modified Industrial Stormwater NPDES and State Waste Discharge General Permit May 16, 2012. The modified permit is effective July 1, 2012.

Purpose of the Permit Modification

The permit modification is necessary to address the April 25, 2011 order by the Washington State Pollution Control Hearings Board, which required significant changes to the sampling and corrective action requirements. Ecology has also made revisions to the effluent limits for fecal coliform that apply to approximately eighty facilities discharging to 303(d)-listed impaired waterbodies. Other minor changes were made in response to public comments and to correct various errors and typos.

Current Permit Documents

• Permit (Effective July 1, 2012)
  • Appendix 3 - SWPPP Certification Form (WORD fill in)
  • Appendix 3 - SWPPP Certification Form (PDF print and fill in manually)
• Summary of Changes
• Response to Comments
• Appendix 4
• Appendix 5
• Public Comments (March 2012)
• 2012 Appeal Documents

WAWebDMR & PARIS

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

Permit & Documents - Permit documents, appeal documents, list of dischargers. 

Discharge Monitoring Reports (DMRs)

Permit Applications and Forms - Conditional No Exposure (CNE) application and eligibility criteria, public notice requirements.

Guidance - Engineering Reports, Developing a Stormwater Pollution Prevention Plan, FAQs, Reducing Zinc, How to Sample. 

Find a Lab to Analyze Stormwater Samples

Questions & Answers

Historical Information - Public Comments from previous permits and other documents. 

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