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Non-Transient Non-Community Water System · PWS CT0310052

Cornwall Consolidated School

West Cornwall, Connecticut 06796 - drinking water served from groundwater sources to 202 people, tracked in EPA SDWIS and UCMR5.

202
People served
46
EPA violations
16
Health-based
Untested
UCMR5 result

The verdict

EPA records 46 drinking-water violations at Cornwall Consolidated School, 35% of them health-based - below the Connecticut per-system average.

46
Total EPA violations on record
35%
Health-based (MCL / treatment failure)
202
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cornwall Consolidated School

Cornwall Consolidated School is a local-owned non-transient non-community water system that delivers drinking water to 202 residents in West Cornwall, Connecticut (Litchfield County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 46 total violations for this system , of which 16 (35%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 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 12 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%).

Cornwall Consolidated School's 46 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
202
Total Violations
46
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
Litchfield
School/Daycare
Yes
MCL Violations
16
Monitoring Violations
24
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 12 2015
Coliform (TCR) MR 7 2001
E. COLI MR 4 2023
Revised Total Coliform Rule MCL 4 2023
Revised Total Coliform Rule MON 4 2023
Nitrate MR 3 2004
Nitrite MR 3 2004
CYANIDE MR 3 2021
Public Notice Other 1 2023

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 Cornwall Consolidated 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 CT0310052 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 E. COLI MR 4 SDWIS / CT0310052 / 3014
2023 Revised Total Coliform Rule MCL 4 SDWIS / CT0310052 / 8000
2023 Revised Total Coliform Rule MON 4 SDWIS / CT0310052 / 8000
2023 Public Notice Other 1 SDWIS / CT0310052 / 7500
2021 CYANIDE MR 3 SDWIS / CT0310052 / 1024
2015 Coliform (TCR) MCL 12 SDWIS / CT0310052 / 3100
2004 Nitrate MR 3 SDWIS / CT0310052 / 1040
2004 Nitrite MR 3 SDWIS / CT0310052 / 1041
2001 Coliform (TCR) MR 7 SDWIS / CT0310052 / 3100

How Cornwall Consolidated School Compares

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

Metric Cornwall Consolidated School Connecticut avg Federal benchmark
Total violations 46 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 16 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 202 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 Cornwall Consolidated School water safe to drink? ▼
Cornwall Consolidated School (PWS ID: CT0310052) has 46 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 202 people using Groundwater sources.
How many people does Cornwall Consolidated School serve? ▼
Cornwall Consolidated School serves 202 people in West Cornwall, Connecticut. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Cornwall Consolidated School have? ▼
Cornwall Consolidated School has 46 total violations: 16 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cornwall Consolidated School water? ▼
No PFAS testing data is available for Cornwall Consolidated School under the EPA's UCMR5 monitoring program.
What water source does Cornwall Consolidated School use? ▼
Cornwall Consolidated 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.