PlainWater
States → New Hampshire

Non-Transient Non-Community Water System · PWS NH1715020

Mascenic Regional High Sch

Greenville, New Hampshire 03048 - drinking water served from groundwater sources to 350 people, tracked in EPA SDWIS and UCMR5.

350
People served
134
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 134 drinking-water violations at Mascenic Regional High Sch, 1% of them health-based - above the New Hampshire per-system average.

134
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
350
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mascenic Regional High Sch

Mascenic Regional High Sch is a local-owned non-transient non-community water system that delivers drinking water to 350 residents in Greenville, New Hampshire (Hillsborough County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 134 total violations for this system , of which 2 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 132 monitoring and reporting violations are on file. The most recent violation on record dates to 2001.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 6 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%).

Mascenic Regional High Sch's 134 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
350
Total Violations
134
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Hillsborough
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
132
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 6 1994
cis-1,2-Dichloroethylene MR 6 1994
Xylenes, Total MR 6 1994
DICHLOROMETHANE MR 6 1994
o-Dichlorobenzene MR 6 1994
p-Dichlorobenzene MR 6 1994
Vinyl chloride MR 6 1994
1,1-Dichloroethylene MR 6 1994
trans-1,2-Dichloroethylene MR 6 1994
1,2-Dichloroethane MR 6 1994
1,1,1-Trichloroethane MR 6 1994
Carbon tetrachloride MR 6 1994
1,2-Dichloropropane MR 6 1994
1,1,2-Trichloroethane MR 6 1994
Tetrachloroethylene MR 6 1994
CHLOROBENZENE MR 6 1994
Benzene MR 6 1994
Toluene MR 6 1994
Styrene MR 6 1994
Ethylbenzene MR 6 1994
Trichloroethylene MR 6 1994
Coliform (TCR) MR 4 2001
Lead and Copper Rule TT 2 1994
Nitrate MR 2 1994

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 Mascenic Regional High Sch.

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 NH1715020 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
2001 Coliform (TCR) MR 4 SDWIS / NH1715020 / 3100
1994 1,2,4-Trichlorobenzene MR 6 SDWIS / NH1715020 / 2378
1994 cis-1,2-Dichloroethylene MR 6 SDWIS / NH1715020 / 2380
1994 Xylenes, Total MR 6 SDWIS / NH1715020 / 2955
1994 DICHLOROMETHANE MR 6 SDWIS / NH1715020 / 2964
1994 o-Dichlorobenzene MR 6 SDWIS / NH1715020 / 2968
1994 p-Dichlorobenzene MR 6 SDWIS / NH1715020 / 2969
1994 Vinyl chloride MR 6 SDWIS / NH1715020 / 2976
1994 1,1-Dichloroethylene MR 6 SDWIS / NH1715020 / 2977
1994 trans-1,2-Dichloroethylene MR 6 SDWIS / NH1715020 / 2979
1994 1,2-Dichloroethane MR 6 SDWIS / NH1715020 / 2980
1994 1,1,1-Trichloroethane MR 6 SDWIS / NH1715020 / 2981
1994 Carbon tetrachloride MR 6 SDWIS / NH1715020 / 2982
1994 1,2-Dichloropropane MR 6 SDWIS / NH1715020 / 2983
1994 1,1,2-Trichloroethane MR 6 SDWIS / NH1715020 / 2985

How Mascenic Regional High Sch Compares

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

Metric Mascenic Regional High Sch New Hampshire avg Federal benchmark
Total violations 134 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 350 506 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 Mascenic Regional High Sch water safe to drink? ▼
Mascenic Regional High Sch (PWS ID: NH1715020) has 134 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 350 people using Groundwater sources.
How many people does Mascenic Regional High Sch serve? ▼
Mascenic Regional High Sch serves 350 people in Greenville, New Hampshire. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Mascenic Regional High Sch have? ▼
Mascenic Regional High Sch has 134 total violations: 2 health-based violations (MCL exceedances or treatment failures), 132 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mascenic Regional High Sch water? ▼
No PFAS testing data is available for Mascenic Regional High Sch under the EPA's UCMR5 monitoring program.
What water source does Mascenic Regional High Sch use? ▼
Mascenic Regional High Sch uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.