Clean Water Act discharge permit · NPDES MA0100510
HOOSAC W P C F, Williamstown, MA: NPDES MA0100510 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 16Pollutants with an effluent exceedance
HOOSAC W P C F, held by HOOSAC WPCF, holds NPDES permit MA0100510, which discharges to Hoosic River. EPA’s file records it issued February 22, 2013 and expiring March 31, 2018. 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 | HOOSAC W P C F |
|---|---|
| Permittee as filed | HOOSAC WPCF |
| NPDES ID | MA0100510 |
| 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 | February 22, 2013 |
| Expiration date | March 31, 2018 |
| Address | Williamstown, MA 01267 |
| Receiving water | HOOSIC RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Hemlock Brook-Hoosic River (HUC 020200030605) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | ICIS-AIR source MA0000002511700068 |
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
- 20Pollutants on file
- 14Under a numeric limit
- 17With 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, settleable | 0 | 72 | 72 | August 31, 2000 | 13,233% over the limit |
| Flow, in conduit or thru treatment plant | 3 | 61 | 61 | April 30, 2001 | 84% over the limit |
| Solids, total suspended | 7 | 51 | 50 | November 30, 2005 | 6,342% over the limit |
| Coliform, fecal general | 0 | 30 | 30 | August 31, 2003 | 99,999% over the limit |
| Chlorine, total residual | 2 | 25 | 25 | October 31, 2002 | 900% over the limit |
| BOD, 5-day, 20 deg. C | 7 | 23 | 23 | October 31, 2009 | 99,999% over the limit |
| BOD, 5-day, percent removal | 1 | 17 | 16 | January 31, 2019 | 267% over the limit |
| pH | 2 | 13 | 13 | June 30, 2003 | |
| Solids, suspended percent removal | 1 | 7 | 7 | December 31, 1997 | 201% over the limit |
| E. coli, colony forming units [CFU] | 2 | 4 | 4 | September 30, 2021 | 99,999% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 3 | 3 | November 30, 2013 | 34% over the limit |
| NOEL Static 7Day Chronic Ceriodaphnia dubia | 1 | 3 | 3 | February 28, 2013 | 99,999% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 0 | 3 | 2 | December 31, 1991 | 62% over the limit |
| Noel Statre 7Day Chronic Pimephales | 0 | 2 | 1 | March 31, 1990 | 52% over the limit |
| Oxygen, dissolved [DO] | 1 | 1 | 1 | June 30, 2002 | 2% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 1 | 1 | September 30, 1991 | 94% over the limit |
| Fluorine, adsorbable organic | 0 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 8 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Phosphate, ortho, dissolved [as P] | 1 | 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 MA0100510.
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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How we handle your data → Privacy
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 MA0100510 there.
Nearby on the register
- Discharge permits in Williamstown
- Every permit record in Williamstown, 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.