Clean Water Act discharge permit · NPDES MA0101788
HUDSON W W T F, Hudson, MA: NPDES MA0101788 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 16Pollutants with an effluent exceedance
HUDSON W W T F holds NPDES permit MA0101788, which discharges to Assabet River. EPA’s file records it issued May 26, 2005 and expiring July 31, 2010. 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 | HUDSON W W T F |
|---|---|
| Permittee as filed | HUDSON W W T F |
| NPDES ID | MA0101788 |
| 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 | May 26, 2005 |
| Expiration date | July 31, 2010 |
| Address | Hudson, MA 01749 |
| Receiving water | ASSABET RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | North Brook-Assabet River (HUC 010700050202) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MAC300006558 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 30Pollutants on file
- 16Under a numeric limit
- 30With a violation of any kind
- 16With 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 | 12 | 94 | 70 | March 31, 2023 | 239% over the limit |
| Copper, total [as Cu] | 4 | 76 | 61 | October 31, 2020 | 235% over the limit |
| Coliform, fecal general | 2 | 53 | 47 | February 28, 2019 | 99,999% over the limit |
| Phosphorus, total [as P] | 28 | 57 | 44 | March 31, 2023 | 570% over the limit |
| BOD, 5-day, 20 deg. C | 12 | 47 | 32 | May 31, 2021 | 168% over the limit |
| pH | 2 | 38 | 27 | October 31, 2022 | |
| Chlorine, total residual | 2 | 35 | 27 | June 30, 2022 | 1,670% over the limit |
| Nitrogen, ammonia total [as N] | 7 | 32 | 26 | October 31, 2021 | 683% over the limit |
| E. coli, colony forming units [CFU] | 0 | 9 | 9 | March 31, 2023 | 155% over the limit |
| Flow, in conduit or thru treatment plant | 3 | 14 | 6 | April 30, 2005 | 31% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 11 | 6 | September 30, 2010 | 99,999% over the limit |
| Solids, suspended percent removal | 1 | 9 | 6 | March 31, 2023 | 99,999% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 9 | 4 | June 30, 2011 | 80% over the limit |
| BOD, 5-day, percent removal | 1 | 7 | 4 | March 31, 2010 | 56% over the limit |
| Oxygen, dissolved [DO] | 1 | 5 | 4 | July 31, 2021 | 20% over the limit |
| Aluminum, total [as Al] | 3 | 11 | 3 | August 31, 2020 | 35,871% over the limit |
| Nickel, total recoverable | 0 | 11 | 0 | ||
| Carbon, tot organic [TOC] | 0 | 10 | 0 | ||
| Zinc, total recoverable | 0 | 10 | 0 | ||
| Aluminum, total recoverable | 0 | 10 | 0 | ||
| Cadmium, total recoverable | 0 | 10 | 0 | ||
| Lead, total recoverable | 0 | 10 | 0 | ||
| Phosphate, ortho, dissolved [as P] | 4 | 8 | 0 | ||
| Nitrogen, total [as N] | 0 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 8 | 0 | ||
| Copper, total recoverable | 0 | 5 | 0 | ||
| Specific Conductance | 0 | 5 | 0 | ||
| Alkalinity, total [as CaCO3] | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 2 | 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 MA0101788.
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 MA0101788 there.
Nearby on the register
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- Every permit record in Hudson, A to Z
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- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.