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Community Water System · PWS CT1390021

Aquarion-Suffield

Shelton, Connecticut 06484 - drinking water served from groundwater sources to 595 people, tracked in EPA SDWIS and UCMR5.

595
People served
121
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 121 drinking-water violations at Aquarion-Suffield, 3% of them health-based - above the Connecticut per-system average.

121
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
595
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Aquarion-Suffield

Aquarion-Suffield is a private-owned community water system that delivers drinking water to 595 residents in Shelton, Connecticut (Hartford County) through 231 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 121 total violations for this system , of which 4 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 95 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 14 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. Statewide, 40 of 63 UCMR5-tested systems have reported PFAS detections (63.5%).

Aquarion-Suffield's 121 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
595
Total Violations
121
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
231
County
Hartford
School/Daycare
No
MCL Violations
4
Monitoring Violations
95
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 14 2018
Lead and Copper Rule MR 10 2009
Nitrate MR 5 2019
Coliform (TCR) MCL 4 2004
1,2,4-Trichlorobenzene MR 4 2002
DICHLOROMETHANE MR 4 2002
trans-1,2-Dichloroethylene MR 4 2002
1,2-Dichloropropane MR 4 2002
1,1,2-Trichloroethane MR 4 2002
CHLOROBENZENE MR 4 2002
Benzene MR 4 2002
Toluene MR 4 2002
Ethylbenzene MR 4 2002
o-Dichlorobenzene MR 4 2002
p-Dichlorobenzene MR 4 2002
Vinyl chloride MR 4 2002
1,1-Dichloroethylene MR 4 2002
1,2-Dichloroethane MR 4 2002
Carbon tetrachloride MR 4 2002
Trichloroethylene MR 4 2002
cis-1,2-Dichloroethylene MR 4 2002
Styrene MR 4 2002
1,1,1-Trichloroethane MR 4 2002
Tetrachloroethylene MR 4 2002
Public Notice Other 3 2015

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-Suffield.

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 CT1390021 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 Nitrate MR 5 SDWIS / CT1390021 / 1040
2018 Consumer Confidence Rule Other 14 SDWIS / CT1390021 / 7000
2015 Public Notice Other 3 SDWIS / CT1390021 / 7500
2009 Lead and Copper Rule MR 10 SDWIS / CT1390021 / 5000
2004 Coliform (TCR) MCL 4 SDWIS / CT1390021 / 3100
2002 1,2,4-Trichlorobenzene MR 4 SDWIS / CT1390021 / 2378
2002 DICHLOROMETHANE MR 4 SDWIS / CT1390021 / 2964
2002 trans-1,2-Dichloroethylene MR 4 SDWIS / CT1390021 / 2979
2002 1,2-Dichloropropane MR 4 SDWIS / CT1390021 / 2983
2002 1,1,2-Trichloroethane MR 4 SDWIS / CT1390021 / 2985
2002 CHLOROBENZENE MR 4 SDWIS / CT1390021 / 2989
2002 Benzene MR 4 SDWIS / CT1390021 / 2990
2002 Toluene MR 4 SDWIS / CT1390021 / 2991
2002 Ethylbenzene MR 4 SDWIS / CT1390021 / 2992
2002 o-Dichlorobenzene MR 4 SDWIS / CT1390021 / 2968

How Aquarion-Suffield Compares

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

Metric Aquarion-Suffield Connecticut avg Federal benchmark
Total violations 121 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 595 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-Suffield water safe to drink? ▼
Aquarion-Suffield (PWS ID: CT1390021) has 121 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 595 people using Groundwater sources.
How many people does Aquarion-Suffield serve? ▼
Aquarion-Suffield serves 595 people in Shelton, Connecticut. It is a Private-owned system using Groundwater water sources with 231 service connections.
What type of violations does Aquarion-Suffield have? ▼
Aquarion-Suffield has 121 total violations: 4 health-based violations (MCL exceedances or treatment failures), 95 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Aquarion-Suffield water? ▼
No PFAS testing data is available for Aquarion-Suffield under the EPA's UCMR5 monitoring program.
What water source does Aquarion-Suffield use? ▼
Aquarion-Suffield 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.