Non-Transient Non-Community Water System · PWS MA2034010

Nashoba Regional High School

Bolton, Massachusetts 01740 - drinking water served from groundwater sources to 1,057 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

1,057
People served: 134
EPA violations: 0
Health-based: Untested
UCMR5 result

The verdict

EPA records 134 drinking-water violations at Nashoba Regional High School - above the Massachusetts per-system average.

134
Total EPA violations on record: 0%
Health-based (MCL / treatment failure): 1,057
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Nashoba Regional High School

Nashoba Regional High School is a local-owned non-transient non-community water system that delivers drinking water to 1,057 residents in Bolton, Massachusetts (Worcester 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 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 124 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 13 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 Massachusetts, EPA tracks 1,599 public water systems serving 10,332,845 people, with 73,886 cumulative violations and 7,389 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 46.2 violations. Statewide, 148 of 263 UCMR5-tested systems have reported PFAS detections (56.3%).

Nashoba Regional High School's 134 violations sit above the Massachusetts 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

1,057

Total Violations

134

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Non-Transient Non-Community
Owner Type: Local
Connections: 1
County: Worcester
School/Daycare: Yes
MCL Violations: 0
Monitoring Violations: 124
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Lead and Copper Rule	MR	13	2023
Revised Total Coliform Rule	RPT	2	2018
Nitrate	MR	2	1995
BHC-GAMMA	MR	2	1997
Diquat	MR	2	1997
Endothall	MR	2	1997
Di(2-ethylhexyl) adipate	MR	2	1997
Aldicarb sulfoxide	MR	2	1997
Hexachlorocyclopentadiene	MR	2	1997
Aldicarb sulfone	MR	2	1997
Carbofuran	MR	2	1997
Aldicarb	MR	2	1997
Heptachlor epoxide	MR	2	1997
2,4,5-TP	MR	2	1997
HEXACHLOROBENZENE	MR	2	1997
Pentachlorophenol	MR	2	1997
1,2-DIBROMO-3-CHLOROPROPANE	MR	2	1997
ETHYLENE DIBROMIDE	MR	2	1997
Xylenes, Total	MR	2	1997
Chlordane	MR	2	1997
DICHLOROMETHANE	MR	2	1997
o-Dichlorobenzene	MR	2	1997
p-Dichlorobenzene	MR	2	1997
Vinyl chloride	MR	2	1997
trans-1,2-Dichloroethylene	MR	2	1997
1,1,1-Trichloroethane	MR	2	1997
Carbon tetrachloride	MR	2	1997
1,2-Dichloropropane	MR	2	1997
1,1,2-Trichloroethane	MR	2	1997
Tetrachloroethylene	MR	2	1997

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 Nashoba Regional High School.

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 MA2034010 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Massachusetts Drinking Water Authority

MassDEP, Drinking Water Program is the primacy agency that licenses and inspects Nashoba Regional High School under EPA-delegated authority.

Open MA regulator portal

Source: MassDEP, Drinking Water Program

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
2023	Lead and Copper Rule	MR	13	SDWIS / MA2034010 / 5000
2018	Revised Total Coliform Rule	RPT	2	SDWIS / MA2034010 / 8000
1997	BHC-GAMMA	MR	2	SDWIS / MA2034010 / 2010
1997	Diquat	MR	2	SDWIS / MA2034010 / 2032
1997	Endothall	MR	2	SDWIS / MA2034010 / 2033
1997	Di(2-ethylhexyl) adipate	MR	2	SDWIS / MA2034010 / 2035
1997	Aldicarb sulfoxide	MR	2	SDWIS / MA2034010 / 2043
1997	Hexachlorocyclopentadiene	MR	2	SDWIS / MA2034010 / 2042
1997	Aldicarb sulfone	MR	2	SDWIS / MA2034010 / 2044
1997	Carbofuran	MR	2	SDWIS / MA2034010 / 2046
1997	Aldicarb	MR	2	SDWIS / MA2034010 / 2047
1997	Heptachlor epoxide	MR	2	SDWIS / MA2034010 / 2067
1997	2,4,5-TP	MR	2	SDWIS / MA2034010 / 2110
1997	HEXACHLOROBENZENE	MR	2	SDWIS / MA2034010 / 2274
1997	Pentachlorophenol	MR	2	SDWIS / MA2034010 / 2326

How Nashoba Regional High School Compares

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

Metric	Nashoba Regional High School	Massachusetts avg	Federal benchmark
Total violations	134	46.2	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	0	4.6	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	56.3%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	1,057	6,462	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,599 regulated public water systems in Massachusetts.

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 Nashoba Regional High School water safe to drink? ▼

Nashoba Regional High School (PWS ID: MA2034010) has 134 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,057 people using Groundwater sources.

How many people does Nashoba Regional High School serve? ▼

Nashoba Regional High School serves 1,057 people in Bolton, Massachusetts. It is a Local-owned system using Groundwater water sources with 1 service connections.

What type of violations does Nashoba Regional High School have? ▼

Nashoba Regional High School has 134 total violations: 0 health-based violations (MCL exceedances or treatment failures), 124 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Nashoba Regional High School water? ▼

No PFAS testing data is available for Nashoba Regional High School under the EPA's UCMR5 monitoring program.

What water source does Nashoba Regional High School use? ▼

Nashoba Regional High School 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.