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Community Water System · PWS NH2384010

Sullivan County Complex

Unity, New Hampshire 03743 - drinking water served from groundwater sources to 625 people, tracked in EPA SDWIS and UCMR5.

625
People served
334
EPA violations
17
Health-based
Untested
UCMR5 result

The verdict

EPA records 334 drinking-water violations at Sullivan County Complex, 5% of them health-based - above the New Hampshire per-system average.

334
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
625
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sullivan County Complex

Sullivan County Complex is a local-owned community water system that delivers drinking water to 625 residents in Unity, New Hampshire (Sullivan County) through 6 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 334 total violations for this system , of which 17 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 288 monitoring and reporting violations are on file. The most recent violation on record dates to 2012.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 17 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. Statewide, 23 of 51 UCMR5-tested systems have reported PFAS detections (45.1%).

Sullivan County Complex's 334 violations sit above the New Hampshire average.

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
625
Total Violations
334
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
6
County
Sullivan
School/Daycare
No
MCL Violations
17
Monitoring Violations
288
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 17 1991
Chlorine MR 16 2009
Lead and Copper Rule MR 14 2012
Consumer Confidence Rule Other 13 2009
Public Notice Other 10 2009
Total Haloacetic Acids (HAA5) MR 7 2005
TTHM MR 7 2005
Nitrate MR 6 2008
Coliform (TCR) MR 6 2009
Nitrite MR 4 2004
Barium MR 4 2004
cis-1,2-Dichloroethylene MR 4 2004
Cadmium MR 4 2004
Methoxychlor MR 4 2004
Chromium MR 4 2004
DICHLOROMETHANE MR 4 2004
Glyphosate MR 4 2004
o-Dichlorobenzene MR 4 2004
Di(2-ethylhexyl) adipate MR 4 2004
Mercury MR 4 2004
Vinyl chloride MR 4 2004
Selenium MR 4 2004
1,1-Dichloroethylene MR 4 2004
Antimony, Total MR 4 2004
1,2-Dichloroethane MR 4 2004
1,1,1-Trichloroethane MR 4 2004
Hexachlorocyclopentadiene MR 4 2004
Atrazine MR 4 2004
Trichloroethylene MR 4 2004
LASSO MR 4 2004

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 Sullivan County Complex.

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 NH2384010 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
2012 Lead and Copper Rule MR 14 SDWIS / NH2384010 / 5000
2009 Chlorine MR 16 SDWIS / NH2384010 / 0999
2009 Consumer Confidence Rule Other 13 SDWIS / NH2384010 / 7000
2009 Public Notice Other 10 SDWIS / NH2384010 / 7500
2009 Coliform (TCR) MR 6 SDWIS / NH2384010 / 3100
2008 Nitrate MR 6 SDWIS / NH2384010 / 1040
2005 Total Haloacetic Acids (HAA5) MR 7 SDWIS / NH2384010 / 2456
2005 TTHM MR 7 SDWIS / NH2384010 / 2950
2004 Nitrite MR 4 SDWIS / NH2384010 / 1041
2004 Barium MR 4 SDWIS / NH2384010 / 1010
2004 cis-1,2-Dichloroethylene MR 4 SDWIS / NH2384010 / 2380
2004 Cadmium MR 4 SDWIS / NH2384010 / 1015
2004 Methoxychlor MR 4 SDWIS / NH2384010 / 2015
2004 Chromium MR 4 SDWIS / NH2384010 / 1020
2004 DICHLOROMETHANE MR 4 SDWIS / NH2384010 / 2964

How Sullivan County Complex Compares

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

Metric Sullivan County Complex New Hampshire avg Federal benchmark
Total violations 334 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 17 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 625 506 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Sullivan County Complex water safe to drink? ▼
Sullivan County Complex (PWS ID: NH2384010) has 334 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 625 people using Groundwater sources.
How many people does Sullivan County Complex serve? ▼
Sullivan County Complex serves 625 people in Unity, New Hampshire. It is a Local-owned system using Groundwater water sources with 6 service connections.
What type of violations does Sullivan County Complex have? ▼
Sullivan County Complex has 334 total violations: 17 health-based violations (MCL exceedances or treatment failures), 288 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sullivan County Complex water? ▼
No PFAS testing data is available for Sullivan County Complex under the EPA's UCMR5 monitoring program.
What water source does Sullivan County Complex use? ▼
Sullivan County Complex 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.