Clean Water Act discharge permit · NPDES MAG590008
MEDFIELD WASTEWATER TREATMENT FACILITY, Medfield, MA: NPDES MAG590008 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 65Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
MEDFIELD WASTEWATER TREATMENT FACILITY, held by MEDFIELD WWTF, holds NPDES permit MAG590008, which discharges to Charles 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 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MEDFIELD WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | MEDFIELD WWTF |
| NPDES ID | MAG590008 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 28, 2022 |
| Expiration date | October 31, 2027 |
| Address | Medfield, MA 02052 |
| Receiving water | CHARLES RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Stop River-Charles River (HUC 010900010604) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 65Pollutants on file
- 65Under a numeric limit
- 65With 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 65 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| E. coli | 2 | 33 | 25 | April 30, 2026 | 1,297% over the limit |
| Phosphorus, total [as P] | 2 | 17 | 13 | May 31, 2026 | 370% over the limit |
| Nitrogen, ammonia total [as N] | 7 | 25 | 10 | April 30, 2026 | 322% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 31 | 7 | December 31, 2024 | 184% over the limit |
| pH | 3 | 18 | 6 | December 31, 2025 | |
| Solids, total suspended | 6 | 29 | 5 | May 31, 2025 | 156% over the limit |
| Aluminum, total [as Al] | 3 | 16 | 4 | May 31, 2025 | 140% over the limit |
| Oxygen, dissolved [DO] | 1 | 6 | 2 | January 31, 2025 | 25% over the limit |
| Copper, total [as Cu] | 4 | 17 | 1 | September 30, 2024 | 3% over the limit |
| BOD, 5-day, percent removal | 1 | 5 | 1 | January 31, 2026 | 65% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 5 | 1 | March 31, 2025 | 45% over the limit |
| Perfluorooctanoic acid (PFOA) | 3 | 21 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 3 | 21 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 3 | 21 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 3 | 21 | 0 | ||
| Perfluorohexanoic acid (PFHxA) | 3 | 21 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 3 | 21 | 0 | ||
| Perfluorononanoic acid (PFNA) | 3 | 21 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 3 | 21 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 3 | 21 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 3 | 21 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 3 | 21 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 3 | 21 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 3 | 21 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 3 | 21 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 3 | 21 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 3 | 21 | 0 | ||
| Perfluorobutanesulfonic acid (PFBS) | 3 | 21 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 3 | 21 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 3 | 21 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 3 | 21 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 3 | 21 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 3 | 21 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 3 | 21 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 3 | 21 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 3 | 21 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 3 | 21 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 3 | 21 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 3 | 21 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 3 | 21 | 0 | ||
| Perfluorododecanesulfonic acid (PFDoS) | 3 | 21 | 0 | ||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | 3 | 21 | 0 | ||
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | 3 | 21 | 0 | ||
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | 3 | 21 | 0 | ||
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | 3 | 21 | 0 | ||
| Perfluoro-3-methoxypropanoic acid (PFMPA) | 3 | 21 | 0 | ||
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | 3 | 21 | 0 | ||
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | 3 | 21 | 0 | ||
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | 3 | 21 | 0 | ||
| Perfluoro-4-methoxybutanoic acid (PFMBA) | 3 | 21 | 0 | ||
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | 3 | 21 | 0 | ||
| Nitrogen, total [as N] | 3 | 15 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 10 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 10 | 0 | ||
| Carbon, tot organic [TOC] | 2 | 8 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 8 | 0 | ||
| Cadmium, total [as Cd] | 2 | 8 | 0 | ||
| Lead, total [as Pb] | 2 | 8 | 0 | ||
| Nickel, total [as Ni] | 2 | 8 | 0 | ||
| Zinc, total [as Zn] | 2 | 8 | 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 MAG590008.
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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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.