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AQUARION-NEW MILFORD REGIONAL

PWS ID: CT0960011 · SHELTON, Connecticut 06484

AQUARION-NEW MILFORD REGIONAL serves 13,331 people in SHELTON, Connecticut using Groundwater water sources. It has 126 recorded EPA violations, including 8 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (5 compounds found).

Water Quality Snapshot: AQUARION-NEW MILFORD REGIONAL

AQUARION-NEW MILFORD REGIONAL is a private-owned community water system that delivers drinking water to 13,331 residents in SHELTON, Connecticut (Fairfield County) through 4,826 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 126 total violations for this system , of which 8 (6%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 102 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 9 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 5 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 0.0067 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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-NEW MILFORD REGIONAL's 126 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.

PFAS Detected

5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
13,331
Total Violations
126
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
4,826
County
Fairfield
School/Daycare
No
MCL Violations
8
Monitoring Violations
102
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 9 2000
Coliform (TCR) MCL 8 2002
Consumer Confidence Rule Other 6 2018
Lead and Copper Rule MR 5 2019
cis-1,2-Dichloroethylene MR 4 2006
DICHLOROMETHANE MR 4 2006
p-Dichlorobenzene MR 4 2006
Vinyl chloride MR 4 2006
trans-1,2-Dichloroethylene MR 4 2006
1,2-Dichloroethane MR 4 2006
Carbon tetrachloride MR 4 2006
1,2-Dichloropropane MR 4 2006
1,1,2-Trichloroethane MR 4 2006
Tetrachloroethylene MR 4 2006
CHLOROBENZENE MR 4 2006
Benzene MR 4 2006
TTHM MR 4 2004
o-Dichlorobenzene MR 4 2006
Trichloroethylene MR 4 2006
Styrene MR 4 2006
1,2,4-Trichlorobenzene MR 4 2006
Toluene MR 4 2006
Total Haloacetic Acids (HAA5) MR 4 2004
1,1-Dichloroethylene MR 4 2006
Ethylbenzene MR 4 2006
1,1,1-Trichloroethane MR 4 2006
Public Notice Other 2 2019

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 20 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDoA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 8/7/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFEESA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/7/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 5/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/7/2024 <9 µg/L 9 µg/L Not Detected
PFDA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/7/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/7/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFUnA 5/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 5/7/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHpA 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/7/2024 <0.003 µg/L 0.003 µg/L Not Detected

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-NEW MILFORD REGIONAL.

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 CT0960011 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 5 SDWIS / CT0960011 / 5000
2019 Public Notice Other 2 SDWIS / CT0960011 / 7500
2018 Consumer Confidence Rule Other 6 SDWIS / CT0960011 / 7000
2006 cis-1,2-Dichloroethylene MR 4 SDWIS / CT0960011 / 2380
2006 DICHLOROMETHANE MR 4 SDWIS / CT0960011 / 2964
2006 p-Dichlorobenzene MR 4 SDWIS / CT0960011 / 2969
2006 Vinyl chloride MR 4 SDWIS / CT0960011 / 2976
2006 trans-1,2-Dichloroethylene MR 4 SDWIS / CT0960011 / 2979
2006 1,2-Dichloroethane MR 4 SDWIS / CT0960011 / 2980
2006 Carbon tetrachloride MR 4 SDWIS / CT0960011 / 2982
2006 1,2-Dichloropropane MR 4 SDWIS / CT0960011 / 2983
2006 1,1,2-Trichloroethane MR 4 SDWIS / CT0960011 / 2985
2006 Tetrachloroethylene MR 4 SDWIS / CT0960011 / 2987
2006 CHLOROBENZENE MR 4 SDWIS / CT0960011 / 2989
2006 Benzene MR 4 SDWIS / CT0960011 / 2990

How AQUARION-NEW MILFORD REGIONAL Compares

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

Metric AQUARION-NEW MILFORD REGIONAL Connecticut avg Federal benchmark
Total violations 126 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 5 compounds 63.5% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 13,331 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-NEW MILFORD REGIONAL water safe to drink? ▼
AQUARION-NEW MILFORD REGIONAL (PWS ID: CT0960011) has 126 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 5 PFAS compounds found. This system serves 13,331 people using Groundwater sources.
How many people does AQUARION-NEW MILFORD REGIONAL serve? ▼
AQUARION-NEW MILFORD REGIONAL serves 13,331 people in SHELTON, Connecticut. It is a Private-owned system using Groundwater water sources with 4,826 service connections.
What type of violations does AQUARION-NEW MILFORD REGIONAL have? ▼
AQUARION-NEW MILFORD REGIONAL has 126 total violations: 8 health-based violations (MCL exceedances or treatment failures), 102 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in AQUARION-NEW MILFORD REGIONAL water? ▼
Yes. UCMR5 testing detected 5 PFAS compounds in AQUARION-NEW MILFORD REGIONAL's water supply: PFBS, PFOA, PFPeA, PFOS, PFHxA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does AQUARION-NEW MILFORD REGIONAL use? ▼
AQUARION-NEW MILFORD REGIONAL 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial