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Non-Transient Non-Community Water System · PWS CT0221122

Dr. Helen Baldwin School

Canterbury, Connecticut 06331 - drinking water served from groundwater sources to 310 people, tracked in EPA SDWIS and UCMR5.

310
People served
153
EPA violations
33
Health-based
Untested
UCMR5 result

The verdict

EPA records 153 drinking-water violations at Dr. Helen Baldwin School, 22% of them health-based - above the Connecticut per-system average.

153
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
310
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Dr. Helen Baldwin School

Dr. Helen Baldwin School is a local-owned non-transient non-community water system that delivers drinking water to 310 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 153 total violations for this system , of which 33 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 80 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 Coliform (TCR), recorded in 19 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 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%).

Dr. Helen Baldwin School's 153 violations sit above 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
310
Total Violations
153
Health-Based Violations
33
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Windham
School/Daycare
Yes
MCL Violations
19
Monitoring Violations
80
Treatment Tech Violations
14

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 19 2015
Public Notice Other 12 2023
Revised Total Coliform Rule RPT 12 2022
Revised Total Coliform Rule TT 11 2022
Lead and Copper Rule MR 10 2012
Coliform (TCR) MR 6 2009
Dalapon MR 4 2006
Diquat MR 4 2006
OXAMYL MR 4 2006
Simazine MR 4 2006
Di(2-ethylhexyl) phthalate MR 4 2006
Picloram MR 4 2006
Dinoseb MR 4 2006
Hexachlorocyclopentadiene MR 4 2006
HEXACHLOROBENZENE MR 4 2006
Benzo(a)pyrene MR 4 2006
Revised Total Coliform Rule MON 4 2017
E. COLI MR 4 2017
Endrin MR 4 2006
Di(2-ethylhexyl) adipate MR 4 2006
Glyphosate MR 4 2006
Lead and Copper Rule TT 3 2004
Aldicarb sulfone MR 2 2006
Aldicarb sulfoxide MR 2 2006

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 Dr. Helen Baldwin 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 CT0221122 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
2023 Public Notice Other 12 SDWIS / CT0221122 / 7500
2022 Revised Total Coliform Rule RPT 12 SDWIS / CT0221122 / 8000
2022 Revised Total Coliform Rule TT 11 SDWIS / CT0221122 / 8000
2017 Revised Total Coliform Rule MON 4 SDWIS / CT0221122 / 8000
2017 E. COLI MR 4 SDWIS / CT0221122 / 3014
2015 Coliform (TCR) MCL 19 SDWIS / CT0221122 / 3100
2012 Lead and Copper Rule MR 10 SDWIS / CT0221122 / 5000
2009 Coliform (TCR) MR 6 SDWIS / CT0221122 / 3100
2006 Dalapon MR 4 SDWIS / CT0221122 / 2031
2006 Diquat MR 4 SDWIS / CT0221122 / 2032
2006 OXAMYL MR 4 SDWIS / CT0221122 / 2036
2006 Simazine MR 4 SDWIS / CT0221122 / 2037
2006 Di(2-ethylhexyl) phthalate MR 4 SDWIS / CT0221122 / 2039
2006 Picloram MR 4 SDWIS / CT0221122 / 2040
2006 Dinoseb MR 4 SDWIS / CT0221122 / 2041

How Dr. Helen Baldwin School Compares

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

Metric Dr. Helen Baldwin School Connecticut avg Federal benchmark
Total violations 153 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 33 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 310 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 Dr. Helen Baldwin School water safe to drink? ▼
Dr. Helen Baldwin School (PWS ID: CT0221122) has 153 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 310 people using Groundwater sources.
How many people does Dr. Helen Baldwin School serve? ▼
Dr. Helen Baldwin School serves 310 people in Canterbury, Connecticut. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Dr. Helen Baldwin School have? ▼
Dr. Helen Baldwin School has 153 total violations: 33 health-based violations (MCL exceedances or treatment failures), 80 monitoring/reporting violations, and 14 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Dr. Helen Baldwin School water? ▼
No PFAS testing data is available for Dr. Helen Baldwin School under the EPA's UCMR5 monitoring program.
What water source does Dr. Helen Baldwin School use? ▼
Dr. Helen Baldwin 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.