General Permit for Discharges from Tanks, Pipes, Other Containment Structures, Dewatering Activities, and Groundwater Remediation - Maryland General Permit No. 25-HT
NOTICE - Renewal Permit Issued (effective December 1, 2026)
The Department has issued the renewal permit for the General Permit for Discharges from Tanks, Pipes, Other Liquid Containment Structures, Dewatering Activities, and Groundwater Remediation, effective December 1, 2026. Existing permittees (registered under the previous 17-HT permit) must submit a Notice of Intent no later than June 1, 2027 to prevent a lapse in coverage.
All permit documents are available below.
Permit Information
Supplemental Information
New Online Service Center
The Department now has the online Environmental Service Center, which applicants can use to easily submit new NOIs, modification requests, notice of terminations, and pay permit fees.
Permit Training
The Department offers
free training opportunities for several of its general permits. Visit the
WPPRP Training Website to sign up for an upcoming training event or to download information from past training events.
Supplemental Information
- Current fee structure in COMAR 26.08.04.09-1 - see section G
- Documents Regarding Use of Chemical Additives
Previous Permit
The 17-HT general permit became effective on August 1, 2020 and expired July 31, 2025.
Contact Info
If you have additional questions or would like more information, please contact the Wastewater Permits Program, Industrial & General Discharge Permits Division at 410-537-3323.
