Commercial Stormwater

The Stormwater Associated with Commercial Activity General Permit, found only in Connecticut, requires operators of large paved commercial sites such as malls, movie theaters, and supermarkets to undertake actions such as parking lot sweeping and catch basin cleaning to keep stormwater clean before it reaches water bodies.

NOTES FOR THE 2025 PUBLIC NOTICES OF THE REISSUANCE OF THE COMMERICIAL STORMWATER GENERAL PERMIT:

03/20/2025 – Notice of Tentative Determination: The Notice of Tentative Determination expresses the intent to reissue the general permit with the changes seen in the Draft Permit, and explains how public comments can be submitted.

03/20/2025 – Fact Sheet: The Fact Sheet explains the permit history and why certain changes are being proposed.

DOCUMENTS FROM THE MARCH 2025 PUBLIC NOTICE

**Draft Permit** (49 pages, uploaded 03/20/2025)

Fact Sheet for the National Pollutant Discharge Elimination System (NPDES) General Permit for the Discharge of Stormwater Associated with Commercial Activities (21 pages, uploaded 03/20/2025)

Notice of Tentative Determination – Intent to Reissue the General Permit for the Discharge of Stormwater Associated with Commercial Activities (3 pages, uploaded 03/20/2025)

General Permit for the Discharge of Stormwater Associated with Commercial Activity (effective October 1, 2023)
Public Notice of Reissuance
Registration Form for the General Permit for the Discharge of Stormwater Associated with Commercial Activity (Word) (PDF)
Fact Sheet

Stormwater Management

Content last updated March 20, 2025

Connecticut Department of Energy & Environmental Protection

Commercial Stormwater