Clean Water Act discharge permit · NPDES MA0100587
PLYMOUTH W W T P, Plymouth, MA: NPDES MA0100587 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 12Pollutants with an effluent exceedance
PLYMOUTH W W T P holds NPDES permit MA0100587, which discharges to Plymouth Harbor. EPA’s file records it issued November 29, 2004 and expiring January 31, 2010. 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 | PLYMOUTH W W T P |
|---|---|
| Permittee as filed | PLYMOUTH W W T P |
| NPDES ID | MA0100587 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 29, 2004 |
| Expiration date | January 31, 2010 |
| Address | Plymouth, MA 02360 |
| Receiving water | PLYMOUTH HARBOR |
| Subwatershed | Eel River-Frontal Plymouth Bay (HUC 010900020106) |
| Other EPA IDs (FRS) | ICIS-AIR source MA0000002512000556 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 27Pollutants on file
- 19Under a numeric limit
- 27With a violation of any kind
- 12With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 59 | 55 | March 31, 2022 | 32,456% over the limit |
| Chlorine, total residual | 2 | 55 | 51 | April 30, 2014 | 1,915% over the limit |
| Solids, total suspended | 7 | 39 | 28 | April 30, 2021 | 335% over the limit |
| Solids, settleable | 2 | 26 | 24 | April 30, 2021 | 14,900% over the limit |
| BOD, 5-day, 20 deg. C | 7 | 34 | 9 | December 31, 2006 | 160% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 14 | 9 | February 28, 2019 | 82,986% over the limit |
| Solids, suspended percent removal | 1 | 9 | 7 | April 30, 2021 | 95% over the limit |
| Copper, total [as Cu] | 2 | 11 | 6 | December 31, 2006 | 332% over the limit |
| Enterococci | 0 | 7 | 5 | July 31, 2021 | 2,227% over the limit |
| NOEL Static 7Day Chronic Menidia | 1 | 9 | 2 | July 31, 2022 | 99,999% over the limit |
| BOD, 5-day, percent removal | 1 | 5 | 2 | December 31, 2006 | 60% over the limit |
| Oxygen, dissolved [DO] | 1 | 2 | 1 | August 31, 2021 | 13% over the limit |
| Chlorophyll A | 0 | 12 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 8 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 7 | 0 | ||
| NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulata | 1 | 7 | 0 | ||
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 6 | 0 | ||
| LC50 Static 48Hr Acute Menidia | 1 | 6 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 5 | 0 | ||
| pH | 2 | 3 | 0 | ||
| Nitrogen, total [as N] | 1 | 3 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 1 | 0 | ||
| Nickel, total recoverable | 0 | 1 | 0 | ||
| Zinc, total recoverable | 0 | 1 | 0 | ||
| Cadmium, total recoverable | 0 | 1 | 0 | ||
| Lead, total recoverable | 0 | 1 | 0 | ||
| Copper, total recoverable | 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 MA0100587.
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, MA0100587.
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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 MA0100587 there.
Nearby on the register
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- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.