Clean Water Act discharge permit · NPDES NH0101052

TROY WASTEWATER TREATMENT PLANT, Troy, NH: NPDES NH0101052 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
22Pollutants under a numeric limit
13Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

TROY WASTEWATER TREATMENT PLANT, held by TROY W W T P, holds NPDES permit NH0101052, which discharges to Ashuelot River - South Branch. EPA’s file records it issued November 20, 2002 and expiring December 31, 2007.

TROY WASTEWATER TREATMENT PLANT, Troy, New Hampshire: Individual permit NH0101052, held by TROY W W T P; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued November 20, 2002, term to December 31, 2007; discharges to ASHUELOT RIVER - SOUTH BRANCH.

Copper, total recoverable: 2 limits, 92 violations of any kind, 91 effluent exceedances, latest March 31, 2022, largest 257% over the limit.
Nitrogen, ammonia total [as N]: 16 limits, 47 violations of any kind, 46 effluent exceedances, latest March 31, 2022, largest 294% over the limit.
pH: 2 limits, 23 violations of any kind, 19 effluent exceedances, latest August 31, 2021.
Phosphorus, total [as P]: 2 limits, 16 violations of any kind, 16 effluent exceedances, latest October 31, 2021, largest 1,047% over the limit.
Chlorine, total residual: 4 limits, 9 violations of any kind, 7 effluent exceedances, latest November 30, 2019, largest 2,550% over the limit.
Solids, total suspended: 10 limits, 22 violations of any kind, 6 effluent exceedances, latest October 31, 2013, largest 333% over the limit.
Solids, suspended percent removal: 1 limit, 4 violations of any kind, 3 effluent exceedances, latest December 31, 2009, largest 500% over the limit.
E. coli, thermotol, MF, MTEC: 2 limits, 3 violations of any kind, 3 effluent exceedances, latest March 31, 2011, largest 136% over the limit.
E. coli, colony forming units [CFU]: 0 limits, 3 violations of any kind, 3 effluent exceedances, latest December 31, 2021, largest 496% over the limit.
BOD, 5-day, 20 deg. C: 0 limits, 22 violations of any kind, 1 effluent exceedance, latest July 31, 2002, largest 27% over the limit.
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia: 2 limits, 2 violations of any kind, 1 effluent exceedance, latest September 30, 2013, largest 50% over the limit.
Noel Statre 7Day Chronic Pimephales: 2 limits, 2 violations of any kind, 1 effluent exceedance, latest September 30, 2012, largest 88% over the limit.
BOD, 5-day, percent removal: 1 limit, 2 violations of any kind, 1 effluent exceedance, latest July 31, 2002, largest 19% over the limit.
Flow, in conduit or thru treatment plant: 2 limits, 7 violations of any kind, 0 effluent exceedances.
Coliform, total general: 0 limits, 6 violations of any kind, 0 effluent exceedances.
Solids, settleable: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Hardness, total [as CaCO3]: 2 limits, 1 violation of any kind, 0 effluent exceedances.
Nickel, total recoverable: 2 limits, 1 violation of any kind, 0 effluent exceedances.
Zinc, total recoverable: 2 limits, 1 violation of any kind, 0 effluent exceedances.
Aluminum, total recoverable: 2 limits, 1 violation of any kind, 0 effluent exceedances.
Cadmium, total recoverable: 2 limits, 1 violation of any kind, 0 effluent exceedances.
Lead, total recoverable: 2 limits, 1 violation of any kind, 0 effluent exceedances.
Chromium, total recoverable: 2 limits, 1 violation of any kind, 0 effluent exceedances.
LC50 Static 48Hr Acute Ceriodaphnia dubia: 2 limits, 1 violation of any kind, 0 effluent exceedances.
LC50 Static 48Hr Acute Pimephales promelas: 2 limits, 1 violation of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 8 limits, 0 violations of any kind, 0 effluent exceedances.

New Hampshire holds 48 Publicly owned treatment works coverages of this permit type in EPA’s file; 16 were issued before NH0101052. TROY W W T P holds 2 permits in New Hampshire.

Other permits held by TROY W W T P

TROY W W T P, Troy: NHL101052, issued January 1, 2021

Coverages issued nearest NH0101052

September 29, 2000: CITY OF SOMERSWORTH, Somersworth, NH0100277, held by SOMERSWORTH W P C F
December 5, 2000: FARMINGTON WWTP, Farmington, NH0100854, held by FARMINGTON W W T P
January 31, 2002: GREENVILLE W W T F, Greenville, NH0100919
June 7, 2002: MERIDEN VILLAGE WATER DISTRICT, Plainfield, NH0101168, held by Meriden Village Water District
September 25, 2002: PITTSFIELD WASTEWATER TREATMENT FACILITY, Pittsfield, NH0100986, held by PITTSFIELD W W T F
August 11, 2004: DERRY W W T P, Derry, NH0100056
November 23, 2005: LEBANON WWTF, West Lebanon, NH0100366, held by LEBANON W W T F
November 23, 2005: WATERVILLE VALLEY ADVANCED W W T F, Waterville Valley, NH0100781, held by WATERVILLE VALLEY W W T P
April 3, 2006: WHITEFIELD WWTP, Whitefield, NH0100510, held by WHITEFIELD W W T P
September 28, 2006: CLAREMONT CITY OF, Claremont, NH0101257, held by CLAREMONT W W T F

TROY WASTEWATER TREATMENT PLANT among its neighbors

EPA’s permit file holds 17 discharge permits in the South Branch Ashuelot River subwatershed (HUC 010802010303), NH0101052 among them. Its county holds 45, 2 of them major permits; NH0101052 is a minor permit.

Other permits in the South Branch Ashuelot River subwatershed (HUC 010802010303)

2021 379 TRANSMISSION LINE STRUCTURE REPLACEMENT PROJECT, Fitzwilliam: NHR1001D7, minor permit, permit term to February 15, 2022
KEENE CITY OF, Swanzey: NHL100790, minor permit, permit term to December 31, 2025
KEENE WWTP, CITY OF KEENE, NH, Swanzey: NHNOEJ00E, minor permit, permit term to April 10, 2024
LINE 367 ASSET CONDITION REPLACEMENT PROJECT, Fitzwilliam: NHR1002BT, minor permit, permit term to February 16, 2027
MONADNOCK SUBSTATION REBUILD, Troy: 01R10I03D, minor permit, permit term to February 16, 2027
MONADNOCK SUBSTATION REBUILD, Troy: NHR10025M, minor permit, permit term to February 16, 2027
MONADNOCK SUBSTATION REBUILD, Troy: NHR10025O, minor permit, permit term to February 16, 2027
MT. CAESAR ELEMENTARY SCHOOL, Swanzey: NHR10021S, minor permit, permit term to February 16, 2027
SCRAP IT RECYCLING FACILITY, Marlborough: NHR1001M4, minor permit, permit term to February 16, 2027
T198 LINE MAINTENANCE PROJECT, Keene, Swanzey, And Troy: 01R10I04H, minor permit, permit term to February 16, 2027

Identity

Facility as filed	TROY WASTEWATER TREATMENT PLANT
Permittee as filed	TROY W W T P
NPDES ID	NH0101052
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	November 20, 2002
Expiration date	December 31, 2007
Address	Troy, NH 03465
Receiving water	ASHUELOT RIVER - SOUTH BRANCH
Subwatershed	South Branch Ashuelot River (HUC 010802010303)

Effluent limits and exceedances

26Pollutants on file
22Under a numeric limit
25With 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
Copper, total recoverable	2	92	91	March 31, 2022	257% over the limit
Nitrogen, ammonia total [as N]	16	47	46	March 31, 2022	294% over the limit
pH	2	23	19	August 31, 2021
Phosphorus, total [as P]	2	16	16	October 31, 2021	1,047% over the limit
Chlorine, total residual	4	9	7	November 30, 2019	2,550% over the limit
Solids, total suspended	10	22	6	October 31, 2013	333% over the limit
Solids, suspended percent removal	1	4	3	December 31, 2009	500% over the limit
E. coli, thermotol, MF, MTEC	2	3	3	March 31, 2011	136% over the limit
E. coli, colony forming units [CFU]	0	3	3	December 31, 2021	496% over the limit
BOD, 5-day, 20 deg. C	0	22	1	July 31, 2002	27% over the limit
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	2	2	1	September 30, 2013	50% over the limit
Noel Statre 7Day Chronic Pimephales	2	2	1	September 30, 2012	88% over the limit
BOD, 5-day, percent removal	1	2	1	July 31, 2002	19% over the limit
Flow, in conduit or thru treatment plant	2	7	0
Coliform, total general	0	6	0
Solids, settleable	0	4	0
Hardness, total [as CaCO3]	2	1	0
Nickel, total recoverable	2	1	0
Zinc, total recoverable	2	1	0
Aluminum, total recoverable	2	1	0
Cadmium, total recoverable	2	1	0
Lead, total recoverable	2	1	0
Chromium, total recoverable	2	1	0
LC50 Static 48Hr Acute Ceriodaphnia dubia	2	1	0
LC50 Static 48Hr Acute Pimephales promelas	2	1	0
BOD, carbonaceous [5 day, 20 C]	8	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES NH0101052.

Inspections

EPA’s inspection file holds no inspection for NPDES NH0101052.

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 NH0101052.

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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers the NPDES discharge permit NH0101052 held by the Troy Wastewater Treatment Plant in Troy, NH, which discharges to the Ashuelot River - South Branch within the South Branch Ashuelot River subwatershed (HUC 010802010303). The permit's status is listed as administratively continued, with an issue date of November 20, 2002 and an expiration date of December 31, 2007, and the facts show 26 pollutants on file, 22 under a numeric limit, and 13 with an effluent exceedance.