The State of Connecticut has issued updates to the permit requirements for the Discharge of Stormwater Associated with Industrial Activities. If your facility’s operations and/or activities discharge stormwater runoff into State waters, as do many boatyard and commercial waterfront activities, the new regulations take effect October 1, 2025.

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Although each facility is unique in regards to sources, type and volume of stormwater discharge, common marine activities subject to the regulations include pressure washing, sanding, painting, engine maintenance, material storage, and more.

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Administered by the Department of Energy and Environmental Protection (“DEEP”), the updated general permit requires registration for new and existing permittees and the development and implementation of a site-specific Stormwater Pollution Prevention Plan (“SWPPP”). The new updates also include significant changes to the general permit, such as:

• clarifications on stormwater and non-stormwater discharge authorizations and prohibitions

• additional sector-specific definitions

• additional stormwater control measures, best management practices

• increased monitoring requirements

• new corrective actions

• new electronic reporting

• a new online non-compliance notification reporting tool

• recommendations for resiliency measures

• annual report filing.

RACE is up to speed on the new registration, monitoring and procedural requirements. Please reach out to us with any specific questions or how RACE can be of assistance in addressing your specific stormwater compliance needs.

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Posted September 23, 2025