Clean Water Act discharge permit · NPDES MA0100285
COHASSET W W T P, Cohasset, MA: NPDES MA0100285 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
COHASSET W W T P holds NPDES permit MA0100285, which discharges to Cohasset Harbor. EPA’s file records it issued October 17, 2000 and expiring October 16, 2005. 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.
Identity
| Facility as filed | COHASSET W W T P |
|---|---|
| Permittee as filed | COHASSET W W T P |
| NPDES ID | MA0100285 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 17, 2000 |
| Expiration date | October 16, 2005 |
| Address | Cohasset, MA 02025 |
| Receiving water | COHASSET HARBOR |
| Subwatershed | Bound Brook-Frontal The Gulf (HUC 010900020103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 0Under a numeric limit
- 14With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| Nitrogen, total [as N] | 0 | 13 | 12 | May 31, 2021 | 320% over the limit |
| Coliform, fecal, colony forming units | 0 | 10 | 10 | November 30, 2019 | 99,999% over the limit |
| Coliform, total general | 0 | 11 | 9 | September 30, 2010 | 5,614% over the limit |
| Solids, total suspended | 0 | 13 | 4 | March 31, 2008 | 58% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 5 | 3 | December 31, 2017 | 97% over the limit |
| pH | 0 | 5 | 3 | May 31, 2007 | |
| LC50 Static 48Hr Acute Menidia | 0 | 12 | 2 | April 30, 2021 | 29% over the limit |
| BOD, 5-day, percent removal | 0 | 3 | 2 | December 31, 2017 | 40% over the limit |
| Solids, suspended percent removal | 0 | 3 | 2 | March 31, 2008 | 137% over the limit |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 0 | 11 | 1 | May 31, 2005 | 58% over the limit |
| Nitrogen, Kjeldahl, total [as N] | 0 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 1 | 0 | ||
| Ammonia & ammonium- total | 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 MA0100285.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, MA0100285.
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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 MA0100285 there.
Nearby on the register
- Discharge permits in Cohasset
- Every permit record in Cohasset, A to Z
- Discharge permits in Massachusetts
- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.