Clean Water Act discharge permit · NPDES NH0100668
ROCHESTER WWTF, Gonic, NH: NPDES NH0100668 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 13Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
ROCHESTER WWTF holds NPDES permit NH0100668, which discharges to Cocheco River. EPA’s file records it issued July 23, 1997 and expiring June 30, 2002. 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 | ROCHESTER WWTF |
|---|---|
| Permittee as filed | ROCHESTER WWTF |
| NPDES ID | NH0100668 |
| 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 | July 23, 1997 |
| Expiration date | June 30, 2002 |
| Address | Gonic, NH 03839 |
| Receiving water | COCHECO RIVER |
| Subwatershed | Pokamoonshine Brook-Cocheco River (HUC 010600030603) |
| Other EPA IDs (FRS) | ICIS-AIR source NH0000003301790254 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 20Pollutants on file
- 18Under a numeric limit
- 19With a violation of any kind
- 13With 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 | 36 | 96 | 79 | July 31, 2016 | 574% over the limit |
| E. coli, thermotol, MF, MTEC | 4 | 41 | 39 | June 30, 2016 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 37 | 32 | July 31, 2000 | 92% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 37 | 17 | October 31, 2019 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 24 | 14 | 14 | July 31, 2020 | 213% over the limit |
| Nitrogen, ammonia total [as N] | 36 | 24 | 6 | December 31, 2001 | 426% over the limit |
| Noel Statre 7Day Chronic Pimephales | 1 | 25 | 3 | October 31, 2017 | 82% over the limit |
| Oxygen, dissolved [DO] | 3 | 4 | 3 | December 31, 2022 | 33% over the limit |
| pH | 4 | 6 | 2 | August 31, 2000 | |
| Chlorine, total residual | 3 | 5 | 2 | June 30, 2000 | 370% over the limit |
| Phosphorus, total [as P] | 0 | 2 | 2 | July 31, 2025 | 87% over the limit |
| Solids, suspended percent removal | 1 | 1 | 1 | March 31, 2009 | 53% over the limit |
| E. coli | 0 | 1 | 1 | March 31, 2026 | 327% over the limit |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 21 | 0 | ||
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 1 | 21 | 0 | ||
| Copper, dissolved [as Cu] | 8 | 4 | 0 | ||
| Lead, dissolved [as Pb] | 8 | 3 | 0 | ||
| Zinc, dissolved [as Zn] | 8 | 3 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 1, 2024 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | EP6 |
| April 24, 2024 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
| April 15, 2024 | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | EP6 |
Inspections
EPA’s inspection file holds no inspection for NPDES NH0100668.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES NH0100668.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, NH0100668.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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 NH0100668 there.
Nearby on the register
- Discharge permits in Gonic
- Every permit record in Gonic, A to Z
- Discharge permits in New Hampshire
- Every permit record in New Hampshire, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.