PlainWater
States → New Hampshire

CONTOOCOOK RIVER COOPERATIVE

PWS ID: NH0603010 · DEERING, New Hampshire 03244

CONTOOCOOK RIVER COOPERATIVE serves 245 people in DEERING, New Hampshire using Groundwater water sources. It has 143 recorded EPA violations, including 60 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CONTOOCOOK RIVER COOPERATIVE

CONTOOCOOK RIVER COOPERATIVE is a private-owned community water system that delivers drinking water to 245 residents in DEERING, New Hampshire (Hillsborough County) through 89 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 143 total violations for this system , of which 60 (42%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 74 monitoring and reporting violations are on file. The most recent violation on record dates to 2013.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 60 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across New Hampshire, EPA tracks 2,453 public water systems serving 1,242,123 people, with 155,970 cumulative violations and 29,649 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 63.6 violations. CONTOOCOOK RIVER COOPERATIVE's 143 violations sit above the New Hampshire average. Statewide, 23 of 51 UCMR5-tested systems have reported PFAS detections (45.1%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
245
Total Violations
143
Health-Based Violations
60
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
89
County
Hillsborough
School/Daycare
No
MCL Violations
60
Monitoring Violations
74
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 60 2013
E. COLI MR 16 2013
Public Notice Other 8 2013
Coliform (TCR) MR 4 2009
Nitrate MR 4 1995
Methoxychlor MR 2 2006
Toxaphene MR 2 2006
Glyphosate MR 2 2006
OXAMYL MR 2 2006
Simazine MR 2 2006
Carbofuran MR 2 2006
Atrazine MR 2 2006
LASSO MR 2 2006
Heptachlor MR 2 2006
2,4-D MR 2 2006
HEXACHLOROBENZENE MR 2 2006
Di(2-ethylhexyl) phthalate MR 2 2006
Endrin MR 2 2006
BHC-GAMMA MR 2 2006
Hexachlorocyclopentadiene MR 2 2006
Pentachlorophenol MR 2 2006
2,4,5-TP MR 2 2006
Dinoseb MR 2 2006
Chlordane MR 2 2006
Heptachlor epoxide MR 2 2006
Benzo(a)pyrene MR 2 2006
Di(2-ethylhexyl) adipate MR 2 2006
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2006
Picloram MR 2 2006
ETHYLENE DIBROMIDE MR 2 2006

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for CONTOOCOOK RIVER COOPERATIVE.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NH0603010 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New Hampshire Drinking Water Authority

New Hampshire's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find NH regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2013 Coliform (TCR) MCL 60 SDWIS / NH0603010 / 3100
2013 E. COLI MR 16 SDWIS / NH0603010 / 3014
2013 Public Notice Other 8 SDWIS / NH0603010 / 7500
2009 Coliform (TCR) MR 4 SDWIS / NH0603010 / 3100
2006 Methoxychlor MR 2 SDWIS / NH0603010 / 2015
2006 Toxaphene MR 2 SDWIS / NH0603010 / 2020
2006 Glyphosate MR 2 SDWIS / NH0603010 / 2034
2006 OXAMYL MR 2 SDWIS / NH0603010 / 2036
2006 Simazine MR 2 SDWIS / NH0603010 / 2037
2006 Carbofuran MR 2 SDWIS / NH0603010 / 2046
2006 Atrazine MR 2 SDWIS / NH0603010 / 2050
2006 LASSO MR 2 SDWIS / NH0603010 / 2051
2006 Heptachlor MR 2 SDWIS / NH0603010 / 2065
2006 2,4-D MR 2 SDWIS / NH0603010 / 2105
2006 HEXACHLOROBENZENE MR 2 SDWIS / NH0603010 / 2274

How CONTOOCOOK RIVER COOPERATIVE Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric CONTOOCOOK RIVER COOPERATIVE New Hampshire avg Federal benchmark
Total violations 143 63.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 60 12.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 45.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 245 506 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,453 regulated public water systems in New Hampshire.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CONTOOCOOK RIVER COOPERATIVE water safe to drink? ▼
CONTOOCOOK RIVER COOPERATIVE (PWS ID: NH0603010) has 143 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 245 people using Groundwater sources.
How many people does CONTOOCOOK RIVER COOPERATIVE serve? ▼
CONTOOCOOK RIVER COOPERATIVE serves 245 people in DEERING, New Hampshire. It is a Private-owned system using Groundwater water sources with 89 service connections.
What type of violations does CONTOOCOOK RIVER COOPERATIVE have? ▼
CONTOOCOOK RIVER COOPERATIVE has 143 total violations: 60 health-based violations (MCL exceedances or treatment failures), 74 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CONTOOCOOK RIVER COOPERATIVE water? ▼
No PFAS testing data is available for CONTOOCOOK RIVER COOPERATIVE under the EPA's UCMR5 monitoring program.
What water source does CONTOOCOOK RIVER COOPERATIVE use? ▼
CONTOOCOOK RIVER COOPERATIVE uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Explore PlainWater

Water in New Hampshire

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for New Hampshire

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial