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Non-Transient Non-Community Water System · PWS NH1175050

Hollis Brookline Hs

Hollis, New Hampshire 03049 - drinking water served from groundwater sources to 980 people, tracked in EPA SDWIS and UCMR5.

980
People served
149
EPA violations
36
Health-based
Untested
UCMR5 result

The verdict

EPA records 149 drinking-water violations at Hollis Brookline Hs, 24% of them health-based - above the New Hampshire per-system average.

149
Total EPA violations on record
24%
Health-based (MCL / treatment failure)
980
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hollis Brookline Hs

Hollis Brookline Hs is a local-owned non-transient non-community water system that delivers drinking water to 980 residents in Hollis, New Hampshire (Hillsborough County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 149 total violations for this system , of which 36 (24%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 110 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 Antimony, Total, recorded in 20 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%).

Hollis Brookline Hs's 149 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
980
Total Violations
149
Health-Based Violations
36
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Hillsborough
School/Daycare
Yes
MCL Violations
36
Monitoring Violations
110
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Antimony, Total MCL 20 2009
Antimony, Total MR 18 2011
Coliform (TCR) MCL 16 2013
Arsenic MR 8 2007
cis-1,2-Dichloroethylene MR 4 2012
o-Dichlorobenzene MR 4 2012
p-Dichlorobenzene MR 4 2012
Vinyl chloride MR 4 2012
1,1,1-Trichloroethane MR 4 2012
Carbon tetrachloride MR 4 2012
1,1,2-Trichloroethane MR 4 2012
Tetrachloroethylene MR 4 2012
Benzene MR 4 2012
Toluene MR 4 2012
1,2-Dichloroethane MR 4 2012
Trichloroethylene MR 4 2012
trans-1,2-Dichloroethylene MR 4 2012
Xylenes, Total MR 4 2012
1,2-Dichloropropane MR 4 2012
1,2,4-Trichlorobenzene MR 4 2012
CHLOROBENZENE MR 4 2012
1,1-Dichloroethylene MR 4 2012
Styrene MR 4 2012
DICHLOROMETHANE MR 4 2012
Ethylbenzene MR 4 2012
Public Notice Other 3 2013

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 Hollis Brookline Hs.

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 NH1175050 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 16 SDWIS / NH1175050 / 3100
2013 Public Notice Other 3 SDWIS / NH1175050 / 7500
2012 cis-1,2-Dichloroethylene MR 4 SDWIS / NH1175050 / 2380
2012 o-Dichlorobenzene MR 4 SDWIS / NH1175050 / 2968
2012 p-Dichlorobenzene MR 4 SDWIS / NH1175050 / 2969
2012 Vinyl chloride MR 4 SDWIS / NH1175050 / 2976
2012 1,1,1-Trichloroethane MR 4 SDWIS / NH1175050 / 2981
2012 Carbon tetrachloride MR 4 SDWIS / NH1175050 / 2982
2012 1,1,2-Trichloroethane MR 4 SDWIS / NH1175050 / 2985
2012 Tetrachloroethylene MR 4 SDWIS / NH1175050 / 2987
2012 Benzene MR 4 SDWIS / NH1175050 / 2990
2012 Toluene MR 4 SDWIS / NH1175050 / 2991
2012 1,2-Dichloroethane MR 4 SDWIS / NH1175050 / 2980
2012 Trichloroethylene MR 4 SDWIS / NH1175050 / 2984
2012 trans-1,2-Dichloroethylene MR 4 SDWIS / NH1175050 / 2979

How Hollis Brookline Hs Compares

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

Metric Hollis Brookline Hs New Hampshire avg Federal benchmark
Total violations 149 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 36 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 980 506 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 Hollis Brookline Hs water safe to drink? ▼
Hollis Brookline Hs (PWS ID: NH1175050) has 149 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 980 people using Groundwater sources.
How many people does Hollis Brookline Hs serve? ▼
Hollis Brookline Hs serves 980 people in Hollis, New Hampshire. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Hollis Brookline Hs have? ▼
Hollis Brookline Hs has 149 total violations: 36 health-based violations (MCL exceedances or treatment failures), 110 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hollis Brookline Hs water? ▼
No PFAS testing data is available for Hollis Brookline Hs under the EPA's UCMR5 monitoring program.
What water source does Hollis Brookline Hs use? ▼
Hollis Brookline Hs 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.