Clean Water Act discharge permit · NPDES NH0100111
HILLSBOROUGH WWTF, Hillsborough, NH: NPDES NH0100111 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 27Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
HILLSBOROUGH WWTF, held by HILLSBOROUGH MTP, holds NPDES permit NH0100111, which discharges to Contoocook River. EPA’s file records it issued May 1, 2007 and expiring June 30, 2012. 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 | HILLSBOROUGH WWTF |
|---|---|
| Permittee as filed | HILLSBOROUGH MTP |
| NPDES ID | NH0100111 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 1, 2007 |
| Expiration date | June 30, 2012 |
| Address | Hillsborough, NH 03244 |
| Receiving water | CONTOOCOOK RIVER |
| Subwatershed | Sand Brook-Contoocook River (HUC 010700030301) |
| Other EPA IDs (FRS) | RCRA handler NHD510059322 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 28Pollutants on file
- 27Under a numeric limit
- 18With 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 |
|---|---|---|---|---|---|
| E. coli, thermotol, MF, MTEC | 2 | 48 | 16 | January 31, 2023 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 7 | 18 | 14 | February 29, 2020 | 125% over the limit |
| pH | 2 | 13 | 11 | August 31, 2019 | |
| Solids, suspended percent removal | 1 | 9 | 9 | December 31, 2017 | 67% over the limit |
| BOD, 5-day, percent removal | 1 | 7 | 7 | January 31, 2020 | 20% over the limit |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 6 | 4 | September 30, 2021 | 29% over the limit |
| Chlorine, total residual | 2 | 4 | 4 | February 28, 2022 | 37% over the limit |
| Solids, total suspended | 7 | 5 | 3 | March 31, 2004 | 347% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 4 | 2 | August 31, 2015 | 35% over the limit |
| Lead, total recoverable | 2 | 4 | 0 | ||
| Copper, total recoverable | 2 | 4 | 0 | ||
| Phosphorus, total [as P] | 0 | 3 | 0 | ||
| Nickel, total recoverable | 2 | 2 | 0 | ||
| Zinc, total recoverable | 2 | 2 | 0 | ||
| Aluminum, total recoverable | 2 | 2 | 0 | ||
| Cadmium, total recoverable | 2 | 2 | 0 | ||
| Chromium, total recoverable | 2 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Selenium, total recoverable | 1 | 0 | 0 | ||
| Thallium, total recoverable | 1 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 1 | 0 | 0 | ||
| Silver total recoverable | 1 | 0 | 0 | ||
| Antimony, total recoverable | 1 | 0 | 0 | ||
| Mercury, total recoverable | 1 | 0 | 0 | ||
| Cyanide, total recoverable | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 30, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
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
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, NH0100111.
Start the watch
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- One watershed — $2,990/year
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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 NH0100111 there.
Nearby on the register
- Discharge permits in Hillsborough
- Every permit record in Hillsborough, 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.