Connecticut reissues dewatering and cleanup wastewater permit; new sites must apply 180 days before discharging
The state's general permit for dewatering and remediation wastewater took effect March 1, 2026 and runs to February 28, 2031. New sites apply 180 days before discharge and file coastal, wildlife and treatment documents. A related draft general permit was withdrawn on July 15, 2026.
The Connecticut Department of Energy and Environmental Protection (DEEP) reissued its General Permit for the Discharge of Dewatering and Remediation Wastewaters (permit number CTDRGP000) in a final action noticed in March 2026, effective March 1, 2026 and expiring February 28, 2031. According to DEEP's program page, the permit covers treated wastewater from activities ranging from petroleum storage tank replacements to large-scale construction dewatering. For sites that have not yet started discharging, the most consequential change for day-to-day practice is the lead time: a new site must apply 180 days before it begins to discharge.
DEEP General Permit for the Discharge of Dewatering and Remediation Wastewaters (CTDRGP000), effective March 1, 2026; Public Act 26-124