Clean Water Act discharge permit · NPDES CTL003921
NAVAL SUBMARINE BASE NEW LONDON, Groton, CT: NPDES CTL003921 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
NAVAL SUBMARINE BASE NEW LONDON holds NPDES permit CTL003921. EPA’s file records it issued January 1, 2021 and expiring December 31, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for NAVAL SUBMARINE BASE NEW LONDON: its NPDES ID, its permit type and status, its dates, its address in Groton, Connecticut. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES CTL003921.
Identity
| Facility as filed | NAVAL SUBMARINE BASE NEW LONDON |
|---|---|
| Permittee as filed | NAVAL SUBMARINE BASE NEW LONDON |
| NPDES ID | CTL003921 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Associated permit record |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Biosolids |
| Issued | January 1, 2021 |
| Expiration date | December 31, 2025 |
| Address | Groton, CT 06349 |
| Subwatershed | Thames River-Frontal New London Harbor (HUC 011000030203) |
| Other EPA IDs (FRS) | RCRA handler CT4170022020; ICIS-AIR source CT0000000901100628 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES CTL003921.
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES CTL003921.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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How we handle your data → Privacy
EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID CTL003921 there.
Nearby on the register
- Discharge permits in Groton
- Every permit record in Groton, A to Z
- Discharge permits in Connecticut
- Every permit record in Connecticut, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.