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Non-Transient Non-Community Water System · PWS MA2286007

Stow Center School

Operator location Bolton, Massachusetts - smaller served population (≤ 999) at 644 people served; 177 SDWIS violations on record from groundwater sources.

644
People served (this PWS)
177
EPA violations (this PWS)
2
Health-based (this PWS)
Untested
UCMR5 (this PWS)
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Stow Center School standing, high SDWIS violation third

644 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). Population rank #25,429 of 29,740 among systems serving 500+.

The verdict

Stow Center School sits in the upper third of the sitemap cohort by violation count (177), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (644; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 1% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.

#25,429 of 29,740
Population · /systems
#370 of 418
Population · MA
177
Total EPA violations on record
1%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Middlesex
School/Daycare
Yes
MCL Violations
2
Monitoring Violations
171
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 10 2001
Lead and Copper Rule MR 10 2024
Benzene MR 4 2011
trans-1,2-Dichloroethylene MR 4 2011
cis-1,2-Dichloroethylene MR 4 2011
1,2-Dichloropropane MR 4 2011
Ethylbenzene MR 4 2011
Toluene MR 4 2011
DICHLOROMETHANE MR 4 2011
Carbon tetrachloride MR 4 2011
1,2,4-Trichlorobenzene MR 4 2011
1,1-Dichloroethylene MR 4 2011
1,2-Dichloroethane MR 4 2011
Trichloroethylene MR 4 2011
o-Dichlorobenzene MR 4 2011
p-Dichlorobenzene MR 4 2011
1,1,1-Trichloroethane MR 4 2011
Tetrachloroethylene MR 4 2011
CHLOROBENZENE MR 4 2011
Styrene MR 4 2011
1,1,2-Trichloroethane MR 4 2011
Vinyl chloride MR 4 2011
Xylenes, Total MR 4 2011
Coliform (TCR) MCL 2 2014
Endrin MR 2 1997
Methoxychlor MR 2 1997
Glyphosate MR 2 1997
Simazine MR 2 1997
Di(2-ethylhexyl) phthalate MR 2 1997
Dinoseb MR 2 1997

Violation Count vs. the National Corpus

Stow Center School has 177 recorded EPA violations, 84% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 16% carry more. 1% of this system's own violations are health-based (2 of 177), and it ranks #25,429 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

177 Higher than most more violations than 84% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

Population served record for Stow Center School

EPA SDWIS lists 644 people served and 1 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.

Sources: EPA SDWIS · MassDEP, Drinking Water Program

Nationwide peers

177 violations · 644 served: nearest cross-state SDWIS matches.

Cross-state systems with comparable violation load

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

Cross-state systems with smaller service footprints

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Stow Center School

Use this system's EPA-reported record as a starting filter, not a final verdict.

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

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