Clean Water Act discharge permit · NPDES MEP000307

PORTSMOUTH NAVAL SHIPYARD, Kittery, ME: NPDES MEP000307 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
1Pollutants with an effluent exceedance

PORTSMOUTH NAVAL SHIPYARD, held by PORTSMOUTH NAVAL SHOP YARD, holds NPDES permit MEP000307. EPA’s file records it issued July 14, 2022 and expiring July 14, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	PORTSMOUTH NAVAL SHIPYARD
Permittee as filed	PORTSMOUTH NAVAL SHOP YARD
NPDES ID	MEP000307
Permit status	Effective
Permit type	Associated permit record
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial pretreatment
Issued	July 14, 2022
Expiration date	July 14, 2027
Address	Kittery, ME 03904
Receiving water impaired	303(D) Listed
NAICS	336611 – Ship Building and Repairing
SIC	3731 – Ship Building And Repairing
Other EPA IDs (FRS)	RCRA handler ME7170022019; ICIS-AIR source ME0000002303100004

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

2Pollutants on file
0Under a numeric limit
2With a violation of any kind
1With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Zinc, total [as Zn]	0	1	1	January 31, 2026	31% over the limit
Oil and grease, hexane extr method	0	1	0

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 MEP000307.

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

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MEP000307.

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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 MEP000307 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers the NPDES discharge permit MEP000307 for PORTSMOUTH NAVAL SHIPYARD in Kittery, ME, which is listed as Effective with a Minor discharger class and an issue date of July 14, 2022 and expiration date of July 14, 2027. The facts list 0 pollutants under a numeric limit and 1 pollutant with an effluent exceedance.