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Community Water System · PWS CT0960101

Aquarion-Carmen Hill

Shelton, Connecticut 06484 - drinking water served from groundwater sources to 322 people, tracked in EPA SDWIS and UCMR5.

322
People served
207
EPA violations
30
Health-based
Untested
UCMR5 result

The verdict

EPA records 207 drinking-water violations at Aquarion-Carmen Hill, 14% of them health-based - above the Connecticut per-system average.

207
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
322
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Aquarion-Carmen Hill

Aquarion-Carmen Hill is a private-owned community water system that delivers drinking water to 322 residents in Shelton, Connecticut (Litchfield County) through 124 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 207 total violations for this system , of which 30 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 155 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 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%).

Aquarion-Carmen Hill's 207 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
322
Total Violations
207
Health-Based Violations
30
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
124
County
Litchfield
School/Daycare
No
MCL Violations
22
Monitoring Violations
155
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 22 2011
Lead and Copper Rule TT 8 1998
Coliform (TCR) MR 7 2009
Consumer Confidence Rule Other 7 2018
Tetrachloroethylene MR 4 1993
1,1,2-Trichloroethane MR 4 1993
1,2-Dichloropropane MR 4 1993
Carbon tetrachloride MR 4 1993
1,2-Dichloroethane MR 4 1993
trans-1,2-Dichloroethylene MR 4 1993
o-Dichlorobenzene MR 4 1993
Beryllium, Total MR 4 1991
Antimony, Total MR 4 1991
Selenium MR 4 1991
Fluoride MR 4 1991
Chromium MR 4 1991
Cadmium MR 4 1991
Barium MR 4 1991
Arsenic MR 4 1991
Ethylbenzene MR 4 1993
Toluene MR 4 1993
CHLOROBENZENE MR 4 1993
1,2-DIBROMO-3-CHLOROPROPANE MR 4 1993
cis-1,2-Dichloroethylene MR 4 1993
Thallium, Total MR 4 1991
Benzene MR 4 1993
ETHYLENE DIBROMIDE MR 4 1993
E. COLI MR 4 2011
1,1-Dichloroethylene MR 4 1993
Styrene MR 4 1993

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 Aquarion-Carmen Hill.

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 CT0960101 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
2019 Public Notice Other 3 SDWIS / CT0960101 / 7500
2018 Consumer Confidence Rule Other 7 SDWIS / CT0960101 / 7000
2017 Lead and Copper Rule MR 4 SDWIS / CT0960101 / 5000
2011 Coliform (TCR) MCL 22 SDWIS / CT0960101 / 3100
2011 E. COLI MR 4 SDWIS / CT0960101 / 3014
2009 Coliform (TCR) MR 7 SDWIS / CT0960101 / 3100
2009 Chlorine MR 2 SDWIS / CT0960101 / 0999
2004 Total Haloacetic Acids (HAA5) MR 3 SDWIS / CT0960101 / 2456
2004 TTHM MR 3 SDWIS / CT0960101 / 2950
1998 Lead and Copper Rule TT 8 SDWIS / CT0960101 / 5000
1993 Tetrachloroethylene MR 4 SDWIS / CT0960101 / 2987
1993 1,1,2-Trichloroethane MR 4 SDWIS / CT0960101 / 2985
1993 1,2-Dichloropropane MR 4 SDWIS / CT0960101 / 2983
1993 Carbon tetrachloride MR 4 SDWIS / CT0960101 / 2982
1993 1,2-Dichloroethane MR 4 SDWIS / CT0960101 / 2980

How Aquarion-Carmen Hill Compares

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

Metric Aquarion-Carmen Hill Connecticut avg Federal benchmark
Total violations 207 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 30 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 322 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 Aquarion-Carmen Hill water safe to drink? ▼
Aquarion-Carmen Hill (PWS ID: CT0960101) has 207 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 322 people using Groundwater sources.
How many people does Aquarion-Carmen Hill serve? ▼
Aquarion-Carmen Hill serves 322 people in Shelton, Connecticut. It is a Private-owned system using Groundwater water sources with 124 service connections.
What type of violations does Aquarion-Carmen Hill have? ▼
Aquarion-Carmen Hill has 207 total violations: 30 health-based violations (MCL exceedances or treatment failures), 155 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Aquarion-Carmen Hill water? ▼
No PFAS testing data is available for Aquarion-Carmen Hill under the EPA's UCMR5 monitoring program.
What water source does Aquarion-Carmen Hill use? ▼
Aquarion-Carmen Hill uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.