Clean Water Act discharge permit · NPDES MA0101591
MIDDLEBOROUGH S T P, Middleborough, MA: NPDES MA0101591 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 17Pollutants with an effluent exceedance
MIDDLEBOROUGH S T P, held by MIDDLEBOROUGH WWTP - DEPT OF PUBLIC WORKS, holds NPDES permit MA0101591, which discharges to Nemasket River. EPA’s file records it issued September 26, 2003 and expiring November 30, 2008. 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 | MIDDLEBOROUGH S T P |
|---|---|
| Permittee as filed | MIDDLEBOROUGH WWTP - DEPT OF PUBLIC WORKS |
| NPDES ID | MA0101591 |
| 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 | September 26, 2003 |
| Expiration date | November 30, 2008 |
| Address | Middleborough, MA 02346 |
| Receiving water | NEMASKET RIVER |
| Subwatershed | Nemasket River (HUC 010900040203) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 23Pollutants on file
- 20Under a numeric limit
- 17With a violation of any kind
- 17With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 11 | 60 | 60 | January 31, 2021 | 398% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 11 | 45 | 45 | January 31, 2021 | 798% over the limit |
| Copper, total [as Cu] | 3 | 43 | 43 | January 31, 2014 | 586% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 19 | 19 | July 31, 2020 | 700% over the limit |
| Phosphorus, total [as P] | 8 | 9 | 7 | November 30, 2018 | 170% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 5 | 5 | August 31, 2022 | 88% over the limit |
| Coliform, fecal general | 2 | 4 | 4 | September 30, 2013 | 90% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 4 | 4 | August 31, 2022 | 100% over the limit |
| Noael Statre 7Day Chronic Ceriodaphnia | 0 | 4 | 4 | January 31, 2003 | 90% over the limit |
| pH | 2 | 2 | 2 | October 31, 2007 | |
| Chlorine, total residual | 2 | 1 | 1 | June 30, 2009 | 67% over the limit |
| Lead, total [as Pb] | 1 | 1 | 1 | May 31, 2010 | 308% over the limit |
| BOD, 5-day, percent removal | 1 | 1 | 1 | March 31, 2010 | 47% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 1 | 1 | February 28, 2021 | 38% over the limit |
| Noel Statre 7Day Chronic Pimephales | 1 | 1 | 1 | February 28, 2021 | 53% over the limit |
| Nitrogen, Total As N | 0 | 1 | 1 | May 31, 2019 | 17% over the limit |
| Noael Statre 7Day Chronic Pimephales | 0 | 1 | 1 | July 31, 2001 | 76% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Solids, suspended percent removal | 1 | 0 | 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 MA0101591.
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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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 MA0101591 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 October 14, 2026.