Clean Water Act discharge permit · NPDES MA0040398
JOHN J. CARROLL WATER TREATMENT PLANT, Boston, MA: NPDES MA0040398 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
JOHN J. CARROLL WATER TREATMENT PLANT, held by John J. Carroll Water Treatment Plant, holds NPDES permit MA0040398, which discharges to Sudbury River. EPA’s file records it issued January 15, 2013 and expiring March 31, 2018. 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 | JOHN J. CARROLL WATER TREATMENT PLANT |
|---|---|
| Permittee as filed | John J. Carroll Water Treatment Plant |
| NPDES ID | MA0040398 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 15, 2013 |
| Expiration date | March 31, 2018 |
| Address | Boston, MA 02128 |
| Receiving water | Sudbury River |
| Subwatershed | Sudbury Reservoir-Sudbury River (HUC 010700050102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 5With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 4 | 2 | 2 | April 30, 2014 | 209% over the limit |
| pH | 6 | 1 | 1 | November 30, 2019 | |
| Lead, total recoverable | 7 | 1 | 0 | ||
| Copper, total recoverable | 7 | 1 | 0 | ||
| Hardness, total [as CaCO3] | 6 | 1 | 0 | ||
| Temperature, water deg. fahrenheit | 6 | 0 | 0 | ||
| Solids, total suspended | 6 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 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 MA0040398.
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 MA0040398 there.
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.