Clean Water Act discharge permit · NPDES MA0100498
MARLBOROUGH EASTERLY W W T F, Marlborough, MA: NPDES MA0100498 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 13Pollutants with an effluent exceedance
MARLBOROUGH EASTERLY W W T F, held by MARLBOROUGH EASTERLY W W T P, holds NPDES permit MA0100498, which discharges to Hop Brook To Sudbury River. EPA’s file records it issued September 14, 2004 and expiring October 31, 2009. 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 | MARLBOROUGH EASTERLY W W T F |
|---|---|
| Permittee as filed | MARLBOROUGH EASTERLY W W T P |
| NPDES ID | MA0100498 |
| 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 14, 2004 |
| Expiration date | October 31, 2009 |
| Address | Marlborough, MA 01752 |
| Receiving water | HOP BROOK TO SUDBURY RIVER |
| Subwatershed | Sand Brook-North Nashua River (HUC 010700040102) |
| Other EPA IDs (FRS) | RCRA handler MAR000010546 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 19Pollutants on file
- 17Under a numeric limit
- 19With a violation of any kind
- 13With 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, ammonia total [as N] | 6 | 64 | 61 | January 31, 2026 | 558% over the limit |
| Phosphorus, total [as P] | 8 | 51 | 49 | July 31, 2026 | 250% over the limit |
| Solids, total suspended | 11 | 17 | 11 | March 31, 2011 | 454% over the limit |
| Flow, in conduit or thru treatment plant | 1 | 12 | 11 | March 31, 2024 | 54% over the limit |
| Coliform, fecal general | 3 | 9 | 6 | November 30, 2014 | 692% over the limit |
| E. coli | 0 | 5 | 5 | March 31, 2026 | 492% over the limit |
| Noel Statre 7Day Chronic Pimephales | 1 | 7 | 4 | December 31, 2010 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 11 | 18 | 3 | April 30, 2010 | 95% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 6 | 3 | December 31, 2021 | 94% over the limit |
| pH | 2 | 3 | 1 | November 30, 2017 | |
| Chlorine, total residual | 2 | 3 | 1 | April 30, 2022 | 63% over the limit |
| Oxygen, dissolved percent saturation | 1 | 2 | 1 | March 31, 2011 | 89% over the limit |
| Copper, total [as Cu] | 0 | 1 | 1 | June 30, 2024 | 613% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 3 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 3 | 0 | ||
| Phosphate, ortho, dissolved [as P] | 4 | 2 | 0 | ||
| Aluminum, total [as Al] | 1 | 2 | 0 | ||
| BOD, 5-day, percent removal | 1 | 1 | 0 | ||
| Solids, suspended percent removal | 1 | 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 MA0100498.
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 MA0100498 there.
Nearby on the register
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- Every permit record in Marlborough, A to Z
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- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.