Clean Water Act discharge permit · NPDES NH0100447
MANCHESTER CITY OF, Manchester, NH: NPDES NH0100447 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 15Pollutants with an effluent exceedance
MANCHESTER CITY OF holds NPDES permit NH0100447, which discharges to Merrimack River & Piscataquog River. EPA’s file records it issued September 25, 2008 and expiring November 30, 2013. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MANCHESTER CITY OF |
|---|---|
| Permittee as filed | MANCHESTER CITY OF |
| NPDES ID | NH0100447 |
| 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 | September 25, 2008 |
| Expiration date | November 30, 2013 |
| Address | Manchester, NH 03103 |
| Receiving water | MERRIMACK RIVER & PISCATAQUOG RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Piscataquog River (HUC 010700060607) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 26Under a numeric limit
- 21With a violation of any kind
- 15With 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 |
|---|---|---|---|---|---|
| E. coli, thermotol, MF, MTEC | 4 | 149 | 143 | November 30, 2014 | 99,999% over the limit |
| E. coli, colony forming units [CFU] | 15 | 177 | 119 | December 31, 2025 | 99,999% over the limit |
| Solids, total suspended | 21 | 103 | 38 | July 31, 2023 | 905% over the limit |
| BOD, 5-day, percent removal | 0 | 29 | 29 | February 28, 2002 | 100% over the limit |
| Solids, suspended percent removal | 0 | 29 | 29 | February 28, 2002 | 180% over the limit |
| Chlorine, total residual | 6 | 29 | 27 | March 31, 2013 | 3,733% over the limit |
| Phosphorus, total [as P] | 1 | 25 | 22 | April 30, 2026 | 217% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 22 | 22 | February 28, 2002 | 110% over the limit |
| pH | 6 | 27 | 21 | February 28, 2010 | |
| Coliform, total general | 0 | 8 | 8 | April 30, 1993 | 99,999% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 6 | 5 | September 30, 2024 | 99,999% over the limit |
| Noel Statre 7Day Chronic Pimephales | 1 | 5 | 4 | June 30, 2009 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 21 | 71 | 2 | June 30, 2023 | 17% over the limit |
| Aluminum, total recoverable | 3 | 1 | 1 | February 28, 2014 | 216% over the limit |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 1 | 1 | June 30, 2006 | 38% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 5 | 0 | ||
| Chromium, total recoverable | 0 | 3 | 0 | ||
| Cadmium, total recoverable | 1 | 1 | 0 | ||
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 1 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 1 | 0 | ||
| Silver total recoverable | 0 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Lead, total recoverable | 1 | 0 | 0 | ||
| Copper, total recoverable | 1 | 0 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 1 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 1 | 0 | 0 | ||
| Cadmium, sludge, total, dry weight [as Cd] | 1 | 0 | 0 | ||
| Bypass of treatment | 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
- 84Single-event violations
The newest 50 of 84.
| Date | What EPA recorded | Agency |
|---|---|---|
| August 3, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 28, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| June 26, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 30, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| April 16, 2026 | PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] | EP6 |
| April 10, 2026 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| March 31, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| October 20, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 3, 2025 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 31, 2025 | PR: Failure of the Control Authority to publish for SNC (Level II - Other) | EP6 |
| July 3, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| June 6, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| June 6, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| June 6, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 31, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 17, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 10, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 8, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 5, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| March 17, 2025 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| January 3, 2025 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| August 19, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 19, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 4, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 4, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 4, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 3, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 16, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| May 26, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| April 12, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| April 4, 2024 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| March 10, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| March 7, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| January 10, 2024 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| December 18, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| December 18, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| December 18, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| December 10, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| November 14, 2023 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 18, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 11, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 11, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 10, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| September 8, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| August 8, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 29, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 21, 2023 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 16, 2023 | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| July 15, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| July 2, 2023 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
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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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.