Clean Water Act discharge permit · NPDES MA0100501
SOUTH ESSEX SEWERAGE DIST WWTP, Salem, MA: NPDES MA0100501 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 12Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
SOUTH ESSEX SEWERAGE DIST WWTP, held by SOUTH ESSEX SEWERAGE DISTRICT, holds NPDES permit MA0100501, which discharges to Salem Harbor. EPA’s file records it issued February 9, 2001 and expiring March 31, 2005. 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 | SOUTH ESSEX SEWERAGE DIST WWTP |
|---|---|
| Permittee as filed | SOUTH ESSEX SEWERAGE DISTRICT |
| NPDES ID | MA0100501 |
| 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 9, 2001 |
| Expiration date | March 31, 2005 |
| Address | Salem, MA 01970 |
| Receiving water | SALEM HARBOR |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MAD094267754; ICIS-AIR source MA0000002511900501 |
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
- 17Pollutants on file
- 12Under a numeric limit
- 16With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 8 | 44 | 44 | March 31, 2026 | 143% over the limit |
| Coliform, fecal general | 6 | 24 | 21 | October 31, 2014 | 99,999% over the limit |
| Chlorine, total residual | 3 | 17 | 17 | January 31, 2024 | 817% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 17 | 17 | March 31, 2026 | 91% over the limit |
| LC50 Static 48Hr Acute Menidia | 2 | 14 | 14 | August 31, 2018 | 48% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 10 | 10 | April 30, 2024 | 6% over the limit |
| Solids, suspended percent removal | 0 | 9 | 9 | April 30, 2024 | 104% over the limit |
| CBOD5+NH3-N | 8 | 2 | 2 | April 30, 2015 | 33% over the limit |
| pH | 4 | 2 | 2 | May 31, 2014 | |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 2 | 2 | 2 | August 31, 2004 | 28% over the limit |
| Enterococci | 0 | 3 | 1 | February 28, 2019 | 26% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 2 | 0 | ||
| Nitrogen, nitrate total [as N] | 4 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 2 | 0 | ||
| LC50 Static 48Hr Acute Arbacia | 0 | 1 | 0 | ||
| Noael Statre 7Day Chronic Menidia | 0 | 1 | 0 | ||
| Oil & Grease | 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 MA0100501.
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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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 MA0100501 there.
Nearby on the register
- Discharge permits in Salem
- Every permit record in Salem, A to Z
- Discharge permits in Massachusetts
- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.