Clean Water Act discharge permit · NPDES MAG590029
HUDSON W W T F, Hudson, MA: NPDES MAG590029 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 67Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
HUDSON W W T F, held by HUDSON WWTF, holds NPDES permit MAG590029, which discharges to Assabet River. EPA’s file records it issued September 28, 2022 and expiring October 31, 2027. 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 | HUDSON W W T F |
|---|---|
| Permittee as filed | HUDSON WWTF |
| NPDES ID | MAG590029 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 28, 2022 |
| Expiration date | October 31, 2027 |
| Address | Hudson, MA 01749 |
| Receiving water | ASSABET RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | North Brook-Assabet River (HUC 010700050202) |
| Other EPA IDs (FRS) | RCRA handler MAC300006558 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 67Pollutants on file
- 67Under a numeric limit
- 52With a violation of any kind
- 11With 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; the 60 with the most exceedances of 67 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 11 | 30 | 30 | February 28, 2025 | 200% over the limit |
| Phosphorus, total [as P] | 2 | 29 | 29 | January 31, 2026 | 900% over the limit |
| Copper, total [as Cu] | 4 | 21 | 21 | July 31, 2026 | 124% over the limit |
| Chlorine, total residual | 2 | 21 | 21 | January 31, 2026 | 2,359% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 20 | 20 | February 28, 2025 | 400% over the limit |
| E. coli | 2 | 19 | 19 | April 30, 2026 | 99,999% over the limit |
| pH | 3 | 10 | 10 | June 30, 2026 | |
| Oxygen, dissolved [DO] | 1 | 7 | 7 | July 31, 2025 | 27% over the limit |
| BOD, 5-day, 20 deg. C | 11 | 5 | 5 | July 31, 2025 | 35% over the limit |
| Solids, suspended percent removal | 1 | 5 | 5 | January 31, 2025 | 146% over the limit |
| BOD, 5-day, percent removal | 1 | 1 | 1 | January 31, 2024 | 34% over the limit |
| Perfluorooctanoic acid (PFOA) | 3 | 6 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 3 | 6 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 3 | 6 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 3 | 6 | 0 | ||
| Perfluorohexanoic acid (PFHxA) | 3 | 6 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 3 | 6 | 0 | ||
| Perfluorononanoic acid (PFNA) | 3 | 6 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 3 | 6 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 3 | 6 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 3 | 6 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 3 | 6 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 3 | 6 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 3 | 6 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 3 | 6 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 3 | 6 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 3 | 6 | 0 | ||
| Perfluorobutanesulfonic acid (PFBS) | 3 | 6 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 3 | 6 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 3 | 6 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 3 | 6 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 3 | 6 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 3 | 6 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 3 | 6 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 3 | 6 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 3 | 6 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 3 | 6 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 3 | 6 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 3 | 6 | 0 | ||
| Perfluorododecanesulfonic acid (PFDoS) | 3 | 6 | 0 | ||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | 3 | 6 | 0 | ||
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | 3 | 6 | 0 | ||
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | 3 | 6 | 0 | ||
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | 3 | 6 | 0 | ||
| Perfluoro-3-methoxypropanoic acid (PFMPA) | 3 | 6 | 0 | ||
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | 3 | 6 | 0 | ||
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | 3 | 6 | 0 | ||
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | 3 | 6 | 0 | ||
| Perfluoro-4-methoxybutanoic acid (PFMBA) | 3 | 6 | 0 | ||
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | 3 | 6 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 3 | 5 | 0 | ||
| Carbon, dissolved organic [as C] | 1 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 0 | 0 | ||
| Aluminum, total [as Al] | 4 | 0 | 0 | ||
| Nitrogen, total [as N] | 3 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 0 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 3 | 0 | 0 | ||
| Carbon, tot organic [TOC] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 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 MAG590029.
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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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 September 15, 2026.