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Non-Transient Non-Community Water System · PWS CT1661262

Tyrrell Middle School

Wolcott, Connecticut 06716 - drinking water served from groundwater sources to 454 people, tracked in EPA SDWIS and UCMR5.

454
People served
107
EPA violations
15
Health-based
Untested
UCMR5 result

The verdict

EPA records 107 drinking-water violations at Tyrrell Middle School, 14% of them health-based - above the Connecticut per-system average.

107
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
454
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tyrrell Middle School

Tyrrell Middle School is a local-owned non-transient non-community water system that delivers drinking water to 454 residents in Wolcott, Connecticut (New Haven County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 107 total violations for this system , of which 15 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 83 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 15 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%).

Tyrrell Middle School's 107 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
454
Total Violations
107
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
New Haven
School/Daycare
Yes
MCL Violations
15
Monitoring Violations
83
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 15 2002
Coliform (TCR) MR 11 2004
Revised Total Coliform Rule MON 4 2016
E. COLI MR 3 2016
Arsenic MR 2 2003
Mercury MR 2 2003
Nickel MR 2 2003
DICHLOROMETHANE MR 2 2005
p-Dichlorobenzene MR 2 2005
trans-1,2-Dichloroethylene MR 2 2005
1,2-Dichloroethane MR 2 2005
Carbon tetrachloride MR 2 2005
1,2-Dichloropropane MR 2 2005
Trichloroethylene MR 2 2005
1,1,2-Trichloroethane MR 2 2005
Benzene MR 2 2005
Toluene MR 2 2005
Styrene MR 2 2005
Revised Total Coliform Rule RPT 2 2016
cis-1,2-Dichloroethylene MR 2 2005
Fluoride MR 2 2003
Chromium MR 2 2003
Cadmium MR 2 2003
Tetrachloroethylene MR 2 2005
1,1-Dichloroethylene MR 2 2005
1,1,1-Trichloroethane MR 2 2005
CYANIDE MR 2 2003
1,2,4-Trichlorobenzene MR 2 2005
Selenium MR 2 2003
CHLOROBENZENE MR 2 2005

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 Tyrrell Middle 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 CT1661262 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
2016 Revised Total Coliform Rule MON 4 SDWIS / CT1661262 / 8000
2016 E. COLI MR 3 SDWIS / CT1661262 / 3014
2016 Revised Total Coliform Rule RPT 2 SDWIS / CT1661262 / 8000
2016 Lead and Copper Rule MR 1 SDWIS / CT1661262 / 5000
2005 DICHLOROMETHANE MR 2 SDWIS / CT1661262 / 2964
2005 p-Dichlorobenzene MR 2 SDWIS / CT1661262 / 2969
2005 trans-1,2-Dichloroethylene MR 2 SDWIS / CT1661262 / 2979
2005 1,2-Dichloroethane MR 2 SDWIS / CT1661262 / 2980
2005 Carbon tetrachloride MR 2 SDWIS / CT1661262 / 2982
2005 1,2-Dichloropropane MR 2 SDWIS / CT1661262 / 2983
2005 Trichloroethylene MR 2 SDWIS / CT1661262 / 2984
2005 1,1,2-Trichloroethane MR 2 SDWIS / CT1661262 / 2985
2005 Benzene MR 2 SDWIS / CT1661262 / 2990
2005 Toluene MR 2 SDWIS / CT1661262 / 2991
2005 Styrene MR 2 SDWIS / CT1661262 / 2996

How Tyrrell Middle School Compares

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

Metric Tyrrell Middle School Connecticut avg Federal benchmark
Total violations 107 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 15 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 454 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 Tyrrell Middle School water safe to drink? ▼
Tyrrell Middle School (PWS ID: CT1661262) has 107 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 454 people using Groundwater sources.
How many people does Tyrrell Middle School serve? ▼
Tyrrell Middle School serves 454 people in Wolcott, Connecticut. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does Tyrrell Middle School have? ▼
Tyrrell Middle School has 107 total violations: 15 health-based violations (MCL exceedances or treatment failures), 83 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tyrrell Middle School water? ▼
No PFAS testing data is available for Tyrrell Middle School under the EPA's UCMR5 monitoring program.
What water source does Tyrrell Middle School use? ▼
Tyrrell Middle 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.