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AQUARION-HICKORY HILLS

PWS ID: CT0180101 · SHELTON, Connecticut 06484

AQUARION-HICKORY HILLS serves 132 people in SHELTON, Connecticut using Groundwater water sources. It has 436 recorded EPA violations, including 8 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: AQUARION-HICKORY HILLS

AQUARION-HICKORY HILLS is a private-owned community water system that delivers drinking water to 132 residents in SHELTON, Connecticut (Fairfield County) through 38 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 436 total violations for this system , of which 8 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 297 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 Consumer Confidence Rule, recorded in 16 violations (Other). 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. AQUARION-HICKORY HILLS's 436 violations sit above the Connecticut average. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%). 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
132
Total Violations
436
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
38
County
Fairfield
School/Daycare
No
MCL Violations
8
Monitoring Violations
297
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 16 2018
Lead and Copper Rule MR 14 2019
Trichloroethylene MR 10 1996
1,1,1-Trichloroethane MR 10 1996
1,2-Dichloroethane MR 10 1996
Vinyl chloride MR 10 1996
p-Dichlorobenzene MR 10 1996
1,1-Dichloroethylene MR 10 1996
Benzene MR 10 1996
Carbon tetrachloride MR 10 1996
Coliform (TCR) MCL 8 2006
1,2-DIBROMO-3-CHLOROPROPANE MR 7 1995
1,2-Dichloropropane MR 7 1996
trans-1,2-Dichloroethylene MR 7 1996
ETHYLENE DIBROMIDE MR 7 1995
o-Dichlorobenzene MR 7 1996
DICHLOROMETHANE MR 7 1996
Styrene MR 7 1996
1,1,2-Trichloroethane MR 7 1996
Tetrachloroethylene MR 7 1996
cis-1,2-Dichloroethylene MR 7 1996
Ethylbenzene MR 7 1996
Toluene MR 7 1996
CHLOROBENZENE MR 7 1996
p-Dichlorobenzene Other 5 1994
1,1,1-Trichloroethane Other 5 1994
Vinyl chloride Other 5 1994
Carbon tetrachloride Other 5 1994
1,1-Dichloroethylene Other 5 1994
Trichloroethylene Other 5 1994

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-HICKORY HILLS.

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 CT0180101 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 Lead and Copper Rule MR 14 SDWIS / CT0180101 / 5000
2018 Consumer Confidence Rule Other 16 SDWIS / CT0180101 / 7000
2018 Nitrate MR 4 SDWIS / CT0180101 / 1040
2018 Nitrite MR 4 SDWIS / CT0180101 / 1041
2016 Cadmium MR 4 SDWIS / CT0180101 / 1015
2016 CYANIDE MR 4 SDWIS / CT0180101 / 1024
2016 Fluoride MR 4 SDWIS / CT0180101 / 1025
2016 Mercury MR 4 SDWIS / CT0180101 / 1035
2016 Selenium MR 4 SDWIS / CT0180101 / 1045
2016 Antimony, Total MR 4 SDWIS / CT0180101 / 1074
2016 Arsenic MR 4 SDWIS / CT0180101 / 1005
2016 Chromium MR 4 SDWIS / CT0180101 / 1020
2016 Nickel MR 4 SDWIS / CT0180101 / 1036
2016 Thallium, Total MR 4 SDWIS / CT0180101 / 1085
2016 Barium MR 4 SDWIS / CT0180101 / 1010

How AQUARION-HICKORY HILLS Compares

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

Metric AQUARION-HICKORY HILLS Connecticut avg Federal benchmark
Total violations 436 88.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 8 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 132 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is AQUARION-HICKORY HILLS water safe to drink? ▼
AQUARION-HICKORY HILLS (PWS ID: CT0180101) has 436 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 132 people using Groundwater sources.
How many people does AQUARION-HICKORY HILLS serve? ▼
AQUARION-HICKORY HILLS serves 132 people in SHELTON, Connecticut. It is a Private-owned system using Groundwater water sources with 38 service connections.
What type of violations does AQUARION-HICKORY HILLS have? ▼
AQUARION-HICKORY HILLS has 436 total violations: 8 health-based violations (MCL exceedances or treatment failures), 297 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in AQUARION-HICKORY HILLS water? ▼
No PFAS testing data is available for AQUARION-HICKORY HILLS under the EPA's UCMR5 monitoring program.
What water source does AQUARION-HICKORY HILLS use? ▼
AQUARION-HICKORY HILLS 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.

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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.

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