Clean Water Act discharge permit · NPDES MA0100722
NORTHBRIDGE WWTP, Northbridge, MA: NPDES MA0100722 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 20Pollutants with an effluent exceedance
NORTHBRIDGE WWTP, held by NORTHBRIDGE W W T P, holds NPDES permit MA0100722, which discharges to Unnamed Brook To Blackstone River. EPA’s file records it issued September 13, 2006 and expiring November 30, 2011. 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 | NORTHBRIDGE WWTP |
|---|---|
| Permittee as filed | NORTHBRIDGE W W T P |
| NPDES ID | MA0100722 |
| 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 13, 2006 |
| Expiration date | November 30, 2011 |
| Address | Northbridge, MA 01588 |
| Receiving water | UNNAMED BROOK TO BLACKSTONE RIVER |
| Subwatershed | Mumford River (HUC 010900030104) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 32Pollutants on file
- 18Under a numeric limit
- 31With a violation of any kind
- 20With 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] | 2 | 131 | 131 | April 30, 2021 | 800% over the limit |
| Copper, total [as Cu] | 4 | 101 | 101 | September 30, 2017 | 1,329% over the limit |
| pH | 2 | 82 | 82 | April 30, 2022 | |
| BOD, 5-day, 20 deg. C | 9 | 56 | 56 | December 31, 2018 | 1,422% over the limit |
| Solids, total suspended | 9 | 33 | 33 | February 29, 2020 | 1,847% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 31 | 22 | July 31, 2014 | 225% over the limit |
| Phosphorus, total [as P] | 3 | 23 | 19 | October 31, 2013 | 240% over the limit |
| Aluminum, total [as Al] | 0 | 16 | 16 | October 31, 2014 | 297% over the limit |
| Oxygen, dissolved [DO] | 1 | 11 | 10 | April 30, 2018 | 38% over the limit |
| Nitrogen, total [as N] | 0 | 10 | 10 | June 30, 2014 | 331% over the limit |
| Coliform, fecal general | 7 | 9 | 9 | July 31, 2003 | 119% over the limit |
| E. coli | 0 | 8 | 8 | October 31, 2021 | 744% over the limit |
| Lead, total [as Pb] | 2 | 5 | 5 | August 31, 2021 | 3,988% over the limit |
| Noel Statre 7Day Chronic Pimephales | 1 | 8 | 4 | April 30, 2016 | 99,999% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 0 | 7 | 4 | January 31, 2023 | 92% over the limit |
| BOD, 5-day, percent removal | 1 | 4 | 4 | August 31, 2007 | 541% over the limit |
| Cadmium, total [as Cd] | 0 | 2 | 2 | December 31, 2022 | 25% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 0 | 4 | 1 | January 31, 2020 | 36% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 1 | 1 | March 31, 2010 | 10% over the limit |
| Enterococci | 0 | 1 | 1 | October 31, 2013 | 109% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 5 | 0 | ||
| Phosphate, ortho, dissolved [as P] | 2 | 2 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 2 | 0 | ||
| Nickel, total recoverable | 0 | 2 | 0 | ||
| Zinc, total recoverable | 0 | 2 | 0 | ||
| Aluminum, total recoverable | 0 | 2 | 0 | ||
| Cadmium, total recoverable | 0 | 2 | 0 | ||
| Lead, total recoverable | 0 | 2 | 0 | ||
| Copper, total recoverable | 0 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 3 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 1 | 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 MA0100722.
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.
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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 MA0100722 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.