Clean Water Act discharge permit · NPDES MAG590028
MAYNARD WATER POLLUTION CONTROL FACILITY, Maynard, MA: NPDES MAG590028 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 68Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
MAYNARD WATER POLLUTION CONTROL FACILITY, held by MAYNARD W P C F, holds NPDES permit MAG590028, 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 | MAYNARD WATER POLLUTION CONTROL FACILITY |
|---|---|
| Permittee as filed | MAYNARD W P C F |
| NPDES ID | MAG590028 |
| 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 | Maynard, MA 01754 |
| Receiving water | ASSABET RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Elizabeth Brook-Assabet River (HUC 010700050204) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 68Pollutants on file
- 68Under a numeric limit
- 24With a violation of any kind
- 4With 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 68 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 5 | 5 | June 30, 2026 | 53% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 3 | 3 | July 31, 2026 | 70% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 2 | 2 | March 31, 2026 | 40% over the limit |
| E. coli | 2 | 3 | 1 | August 31, 2025 | 218% over the limit |
| Perfluorohexanoic acid (PFHxA) | 3 | 3 | 0 | ||
| Copper, total [as Cu] | 4 | 2 | 0 | ||
| Perfluorobutanoic acid (PFBA) | 3 | 2 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 3 | 2 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 3 | 2 | 0 | ||
| Perfluorododecanesulfonic acid (PFDoS) | 3 | 2 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 3 | 1 | 0 | ||
| Perfluoropentanoic acid (PFPeA) | 3 | 1 | 0 | ||
| Perfluorononanoic acid (PFNA) | 3 | 1 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 3 | 1 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 3 | 1 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 3 | 1 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 3 | 1 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 3 | 1 | 0 | ||
| Perfluorohexanesulfonic acid (PFHxS) | 3 | 1 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 3 | 1 | 0 | ||
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | 3 | 1 | 0 | ||
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | 3 | 1 | 0 | ||
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | 3 | 1 | 0 | ||
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | 3 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 6 | 0 | 0 | ||
| Solids, total suspended | 6 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 0 | 0 | ||
| pH | 3 | 0 | 0 | ||
| Nitrogen, total [as N] | 3 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 0 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 3 | 0 | 0 | ||
| Perfluoroheptanoic acid (PFHpA) | 3 | 0 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 3 | 0 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 3 | 0 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 3 | 0 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 3 | 0 | 0 | ||
| Perfluorobutanesulfonic acid (PFBS) | 3 | 0 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 3 | 0 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 3 | 0 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 3 | 0 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 3 | 0 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 3 | 0 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 3 | 0 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 3 | 0 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 3 | 0 | 0 | ||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | 3 | 0 | 0 | ||
| Perfluoro-3-methoxypropanoic acid (PFMPA) | 3 | 0 | 0 | ||
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | 3 | 0 | 0 | ||
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | 3 | 0 | 0 | ||
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | 3 | 0 | 0 | ||
| Perfluoro-4-methoxybutanoic acid (PFMBA) | 3 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Carbon, tot organic [TOC] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Cadmium, total [as Cd] | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 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 MAG590028.
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 Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.