PlainWater
States → Connecticut

Non-Transient Non-Community Water System · PWS CT0220102

Canterbury Elementary School

Canterbury, Connecticut 06331 - drinking water served from groundwater sources to 350 people, tracked in EPA SDWIS and UCMR5.

350
People served
77
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 77 drinking-water violations at Canterbury Elementary School, 5% of them health-based - below the Connecticut per-system average.

77
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
350
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Canterbury Elementary School

Canterbury Elementary School is a local-owned non-transient non-community water system that delivers drinking water to 350 residents in Canterbury, Connecticut (Windham County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 77 total violations for this system , of which 4 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 69 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 11 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 Connecticut, EPA tracks 2,332 public water systems serving 2,886,005 people, with 206,662 cumulative violations and 21,779 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 88.6 violations. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%).

Canterbury Elementary School's 77 violations sit below the Connecticut 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
77
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Windham
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
69
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 11 2017
E. COLI MR 8 2022
Coliform (TCR) MR 6 2007
Revised Total Coliform Rule MON 4 2022
Revised Total Coliform Rule RPT 4 2022
Lead and Copper Rule TT 4 2000
1,2,4-Trichlorobenzene MR 2 2003
DICHLOROMETHANE MR 2 2003
p-Dichlorobenzene MR 2 2003
Vinyl chloride MR 2 2003
1,1-Dichloroethylene MR 2 2003
Carbon tetrachloride MR 2 2003
1,2-Dichloropropane MR 2 2003
Trichloroethylene MR 2 2003
1,1,2-Trichloroethane MR 2 2003
Styrene MR 2 2003
1,2-Dichloroethane MR 2 2003
o-Dichlorobenzene MR 2 2003
Benzene MR 2 2003
cis-1,2-Dichloroethylene MR 2 2003
CHLOROBENZENE MR 2 2003
trans-1,2-Dichloroethylene MR 2 2003
Tetrachloroethylene MR 2 2003
Ethylbenzene MR 2 2003
Toluene MR 2 2003
1,1,1-Trichloroethane MR 2 2003

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 Canterbury Elementary 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 CT0220102 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Connecticut Drinking Water Authority

Connecticut'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 CT 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
2022 E. COLI MR 8 SDWIS / CT0220102 / 3014
2022 Revised Total Coliform Rule MON 4 SDWIS / CT0220102 / 8000
2022 Revised Total Coliform Rule RPT 4 SDWIS / CT0220102 / 8000
2017 Lead and Copper Rule MR 11 SDWIS / CT0220102 / 5000
2007 Coliform (TCR) MR 6 SDWIS / CT0220102 / 3100
2003 1,2,4-Trichlorobenzene MR 2 SDWIS / CT0220102 / 2378
2003 DICHLOROMETHANE MR 2 SDWIS / CT0220102 / 2964
2003 p-Dichlorobenzene MR 2 SDWIS / CT0220102 / 2969
2003 Vinyl chloride MR 2 SDWIS / CT0220102 / 2976
2003 1,1-Dichloroethylene MR 2 SDWIS / CT0220102 / 2977
2003 Carbon tetrachloride MR 2 SDWIS / CT0220102 / 2982
2003 1,2-Dichloropropane MR 2 SDWIS / CT0220102 / 2983
2003 Trichloroethylene MR 2 SDWIS / CT0220102 / 2984
2003 1,1,2-Trichloroethane MR 2 SDWIS / CT0220102 / 2985
2003 Styrene MR 2 SDWIS / CT0220102 / 2996

How Canterbury Elementary School Compares

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

Metric Canterbury Elementary School Connecticut avg Federal benchmark
Total violations 77 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 9.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 63.5% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 350 1,238 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,332 regulated public water systems in Connecticut.

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 Canterbury Elementary School water safe to drink? ▼
Canterbury Elementary School (PWS ID: CT0220102) has 77 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 Canterbury Elementary School serve? ▼
Canterbury Elementary School serves 350 people in Canterbury, Connecticut. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Canterbury Elementary School have? ▼
Canterbury Elementary School has 77 total violations: 4 health-based violations (MCL exceedances or treatment failures), 69 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Canterbury Elementary School water? ▼
No PFAS testing data is available for Canterbury Elementary School under the EPA's UCMR5 monitoring program.
What water source does Canterbury Elementary School use? ▼
Canterbury Elementary 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.