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Community Water System · PWS NH2351010

Tilton Northfield Water Dist

Tilton, New Hampshire 03276 - drinking water served from groundwater sources to 2,500 people, tracked in EPA SDWIS and UCMR5.

2,500
People served
379
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 379 drinking-water violations at Tilton Northfield Water Dist, 1% of them health-based - above the New Hampshire per-system average.

379
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
2,500
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tilton Northfield Water Dist

Tilton Northfield Water Dist is a local-owned community water system that delivers drinking water to 2,500 residents in Tilton, New Hampshire (Merrimack County) through 975 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 379 total violations for this system , of which 4 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 371 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Nitrate, recorded in 25 violations (MR). 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%).

Tilton Northfield Water Dist's 379 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
2,500
Total Violations
379
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
975
County
Merrimack
School/Daycare
No
MCL Violations
3
Monitoring Violations
371
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 25 1995
Arsenic MR 10 1995
cis-1,2-Dichloroethylene MR 10 1995
Cadmium MR 10 1995
Xylenes, Total MR 10 1995
Chromium MR 10 1995
DICHLOROMETHANE MR 10 1995
o-Dichlorobenzene MR 10 1995
Nickel MR 10 1995
1,2-Dichloroethane MR 10 1995
Beryllium, Total MR 10 1995
Carbon tetrachloride MR 10 1995
1,2-Dichloropropane MR 10 1995
Tetrachloroethylene MR 10 1995
Benzene MR 10 1995
Toluene MR 10 1995
Ethylbenzene MR 10 1995
1,2,4-Trichlorobenzene MR 10 1995
CYANIDE MR 10 1995
p-Dichlorobenzene MR 10 1995
Mercury MR 10 1995
Vinyl chloride MR 10 1995
1,1-Dichloroethylene MR 10 1995
Thallium, Total MR 10 1995
1,1,2-Trichloroethane MR 10 1995
CHLOROBENZENE MR 10 1995
Styrene MR 10 1995
Barium MR 10 1995
Antimony, Total MR 10 1995
1,1,1-Trichloroethane MR 10 1995

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 Tilton Northfield Water Dist.

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 NH2351010 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
2021 Lead and Copper Rule MR 6 SDWIS / NH2351010 / 5000
2019 Chlorine MR 4 SDWIS / NH2351010 / 0999
2018 Total Haloacetic Acids (HAA5) MR 2 SDWIS / NH2351010 / 2456
2018 TTHM MR 2 SDWIS / NH2351010 / 2950
2010 Consumer Confidence Rule Other 2 SDWIS / NH2351010 / 7000
2006 Combined Radium (-226 and -228) MR 2 SDWIS / NH2351010 / 4010
1995 Nitrate MR 25 SDWIS / NH2351010 / 1040
1995 Arsenic MR 10 SDWIS / NH2351010 / 1005
1995 cis-1,2-Dichloroethylene MR 10 SDWIS / NH2351010 / 2380
1995 Cadmium MR 10 SDWIS / NH2351010 / 1015
1995 Xylenes, Total MR 10 SDWIS / NH2351010 / 2955
1995 Chromium MR 10 SDWIS / NH2351010 / 1020
1995 DICHLOROMETHANE MR 10 SDWIS / NH2351010 / 2964
1995 o-Dichlorobenzene MR 10 SDWIS / NH2351010 / 2968
1995 Nickel MR 10 SDWIS / NH2351010 / 1036

How Tilton Northfield Water Dist Compares

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

Metric Tilton Northfield Water Dist New Hampshire avg Federal benchmark
Total violations 379 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 2,500 506 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 Tilton Northfield Water Dist water safe to drink? ▼
Tilton Northfield Water Dist (PWS ID: NH2351010) has 379 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,500 people using Groundwater sources.
How many people does Tilton Northfield Water Dist serve? ▼
Tilton Northfield Water Dist serves 2,500 people in Tilton, New Hampshire. It is a Local-owned system using Groundwater water sources with 975 service connections.
What type of violations does Tilton Northfield Water Dist have? ▼
Tilton Northfield Water Dist has 379 total violations: 4 health-based violations (MCL exceedances or treatment failures), 371 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tilton Northfield Water Dist water? ▼
No PFAS testing data is available for Tilton Northfield Water Dist under the EPA's UCMR5 monitoring program.
What water source does Tilton Northfield Water Dist use? ▼
Tilton Northfield Water Dist 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.