Clean Water Act discharge permit · NPDES ME0100846
WESTBROOK/GORHAM WWTF, Westbrook, ME: NPDES ME0100846 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
WESTBROOK/GORHAM WWTF, held by PORTLAND WATER DISTRICT, holds NPDES permit ME0100846, which discharges to Presumpscot River. EPA’s file records it issued April 1, 2012 and expiring March 31, 2017. 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 | WESTBROOK/GORHAM WWTF |
|---|---|
| Permittee as filed | PORTLAND WATER DISTRICT |
| NPDES ID | ME0100846 |
| 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 | April 1, 2012 |
| Expiration date | March 31, 2017 |
| Address | Westbrook, ME 04092 |
| Receiving water | Presumpscot River |
| Subwatershed | Highland Lake-Lower Presumpscot River (HUC 010600010306) |
| Program components on file | CSO, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MED000790998 |
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
- 21Pollutants on file
- 18Under a numeric limit
- 20With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 6 | 66 | 17 | July 31, 2025 | 114% over the limit |
| Solids, total suspended | 6 | 65 | 17 | July 31, 2025 | 304% over the limit |
| E. coli, thermotol, MF, MTEC | 2 | 26 | 14 | December 31, 2025 | 99,999% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 27 | 11 | April 30, 2011 | 45% over the limit |
| Solids, settleable | 1 | 15 | 7 | May 31, 2026 | 16,567% over the limit |
| Solids, suspended percent removal | 1 | 14 | 6 | April 30, 2025 | 87% over the limit |
| Arsenic, total [as As] | 2 | 17 | 3 | November 30, 2010 | 312% over the limit |
| Chlorine, total residual | 2 | 17 | 2 | January 31, 2016 | 103% over the limit |
| BOD, 5-day, percent removal | 1 | 10 | 1 | May 31, 2023 | 13% over the limit |
| Cadmium, total [as Cd] | 0 | 28 | 0 | ||
| pH | 2 | 16 | 0 | ||
| Lead, total [as Pb] | 0 | 14 | 0 | ||
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 2 | 11 | 0 | ||
| Noel Statre 10Day Chronic Salvel. Salmonid | 2 | 11 | 0 | ||
| NOAEL Static 48Hr Acute Ceriodaphnia dubia | 2 | 11 | 0 | ||
| NOAEL Static 48Hr Acute Salvel. Salmonid | 2 | 11 | 0 | ||
| Phosphorus, total [as P] | 4 | 8 | 0 | ||
| Priority pollutants scan [yes/no] | 0 | 7 | 0 | ||
| Analytical Chemistry | 2 | 4 | 0 | ||
| Mercury, total [as Hg] | 2 | 4 | 0 | ||
| Priority Pollutants | 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 ME0100846.
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 ME0100846 there.
Nearby on the register
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- Every permit record in Westbrook, A to Z
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- Every permit record in Maine, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.