A Look at CT DEEP’s Updated Commercial Stormwater Permit
The Connecticut Department of Energy & Environmental Protection (CT DEEP) has announced an updated version of the state’s Commercial Stormwater General Permit, effective December 1, 2025.
The updated permit now includes qualifying educational facilities, including schools, colleges, universities, and campuses.
The permit applies to campuses with:
- 5+ acres of impervious surfaces (roofs, roads, parking areas, synthetic sports fields)
- A stormwater discharge from the site not covered by another permit
Compliance may include:
- Reviewing permit requirements
- Preparing a Stormwater Management Plan
- Developing site maps, pollutant source documentation, and control measures
- Completing CT DEEP’s online registration process by the December 1 deadline
Academic campuses now subject to the Commercial Stormwater GP are required to submit the permit to CT DEEP prior to December 1, 2026.