DEEP: Industrial Stormwater GP

Industrial Stormwater General Permit

The General Permit for the Discharge of Stormwater Associated with Industrial Activity (“Industrial Stormwater General Permit”) regulates industrial facilities with point source discharges that are engaged in specific activities listed in the permit.  To register for this program, these facilities must submit a registration form, and implement a Pollution Prevention Plan (PPP).  The PPP must include information about the site, an inventory of exposed materials, a summary of potential pollutants, a description of and schedule for implementation of storm water control methods, storm water monitoring, and site inspection.  

Industrial Stormwater General Permit Without Modification - issued May 31, 2018; effective October 1, 2018; expires September 30, 2019; a one-year extension of the Industrial Stormwater General Permit that was first effective October 1, 2011, modified December 3, 2013 (to include Addendum for bulk solid deicing material storage), and extended October 1, 2016 for two years. 

Fact Sheet
Markup Version
June 8, 2018 Notice of Reissuance

Draft Industrial Stormwater General Permit Without Modification -- A Notice of Tentative Decision to reissue (i.e. extend) the Industrial Stormwater General Permit without modification for two years was posted August 19, 2019.  This general permit would be effective October 1, 2019 and would expire September 30, 2021; no renewal registration would be required. A Notice of Tentative Decision to reissue the Industrial Stormwater General Permit with modifications is expected to be issued prior to the expiration of this extension.
         Fact Sheet
Guidance Documents:
Go Paperless with DEEP's ezFile!
How to register using ezFile:
  • Set up a User Account   (Instructions for creating a new account)
    (Anyone who intends to prepare, review and/or submit a registration electronically within the ezFile portal must create an account.)
  • Create a Subscriber Agreement (SA) electronically in ezFile. (Instructions for creating an SA)
  • Print Subscriber Agreement (SA).
  • Get "wet" signatures on Subscriber Agreement.
  • Send Subscriber Agreement by postal mail to DEEP and wait for email approval.
  • Every person that will fill out, edit, review, certify, or submit an electronic filing must be
    identified and assigned a role. (Instructions for Assigning User Roles)
  • Once you have received email approval of your SA, you can login to ezFile and complete a filing.
    Remember: ezFile has been optimized for Google Chrome.
If a registrant is not capable of submitting electronically, meaning that they do not have access to a computer, or if you have other questions or concerns regarding ezFile, please contact the stormwater group at 860-424-3025 or 
Check the Status of your Registration/Certification
Use the appropriate form, from the list below, to submit stormwater monitoring data to the department. Refer to Section 5(e) of the general permit with modifications for specific information on monitoring requirements.
Types of Facilities
Revision Date 10/17/11
General (for facilities without sector-specific requirements) Word , PDF
Sector A - Asphalt Plants Word , PDF
Sector B - Mines & Quarries and Stone Cutting Word , PDF
Sector C - Refuse Systems Word , PDF
Sector D - Auto Salvage Yards Word , PDF
Sector E - Scrap Recycling Facilities Word , PDF
Sector F - Steam Electric Power Generation Word , PDF
Sector G - Transportation and Public Works Facilities  
  • (Non-Municipal) Transportation Facilities (SIC Codes 40, 41, 42, 43, 44 - except 4493 and 45) (use the general form)
Word , PDF
  • Large Airports
Word , PDF
  • Small Airports
Word , PDF
  • Federal, State or Municipal Maintenance/Repair/Salt Storage Facilities
  • Bulk Solid De-icing Material Storage Facilities
  • DOT Maintenance and Repair Facilities
Word , PDF
Sector H - Marinas, Yacht Clubs, Boat Dealers Word , PDF
Sector I - Ship & Boat Building and Repair Word , PDF
Sector J - Small Scale Composting Facilities Word , PDF
Content Last Updated August 19, 2019