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Community Water System · PWS CT0261031

Ctwc - Shoreline Region-Chester System

Clinton, Connecticut 06413 - drinking water served from surface water sources to 5,030 people, tracked in EPA SDWIS and UCMR5.

5,030
People served
156
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 156 drinking-water violations at Ctwc - Shoreline Region-Chester System - above the Connecticut per-system average.

156
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
5,030
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ctwc - Shoreline Region-Chester System

Ctwc - Shoreline Region-Chester System is a private-owned community water system that delivers drinking water to 5,030 residents in Clinton, Connecticut (Middlesex County) through 2,620 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 156 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 156 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 Nitrite, recorded in 6 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Ctwc - Shoreline Region-Chester System's 156 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
5,030
Total Violations
156
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
2,620
County
Middlesex
School/Daycare
No
MCL Violations
0
Monitoring Violations
156
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrite MR 6 2007
Fluoride MR 6 2007
Nitrate MR 6 2007
Cadmium MR 4 2005
Chromium MR 4 2005
Antimony, Total MR 4 2005
Beryllium, Total MR 4 2005
Thallium, Total MR 4 2005
Selenium MR 4 2005
1,2,4-Trichlorobenzene MR 4 2005
DICHLOROMETHANE MR 4 2005
o-Dichlorobenzene MR 4 2005
Vinyl chloride MR 4 2005
1,1-Dichloroethylene MR 4 2005
trans-1,2-Dichloroethylene MR 4 2005
1,2-Dichloroethane MR 4 2005
1,1,1-Trichloroethane MR 4 2005
1,2-Dichloropropane MR 4 2005
Ethylbenzene MR 4 2005
p-Dichlorobenzene MR 4 2005
Styrene MR 4 2005
cis-1,2-Dichloroethylene MR 4 2005
Revised Total Coliform Rule MON 4 2016
Trichloroethylene MR 4 2005
1,1,2-Trichloroethane MR 4 2005
CYANIDE MR 4 2005
Benzene MR 4 2005
Carbon tetrachloride MR 4 2005
Tetrachloroethylene MR 4 2005
Barium MR 4 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 174 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 9/13/2023 <2.00 ppt 2.00 ppt Not Detected
PFUnA 9/13/2023 <2.00 ppt 2.00 ppt Not Detected
PFTA 9/13/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/13/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/13/2023 <6.00 ppt 6.00 ppt Not Detected
PFBS 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/13/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFDoA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/13/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 9/13/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/13/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/13/2023 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 9/13/2023 <6.00 ppt 6.00 ppt Not Detected
PFBA 9/13/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 9/13/2023 <8.00 ppt 8.00 ppt Not Detected
PFDA 9/13/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 9/13/2023 <3.00 ppt 3.00 ppt 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 Ctwc - Shoreline Region-Chester System.

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 CT0261031 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 / CT0261031 / 8000
2007 Nitrite MR 6 SDWIS / CT0261031 / 1041
2007 Fluoride MR 6 SDWIS / CT0261031 / 1025
2007 Nitrate MR 6 SDWIS / CT0261031 / 1040
2007 Total Haloacetic Acids (HAA5) MR 2 SDWIS / CT0261031 / 2456
2007 TTHM MR 2 SDWIS / CT0261031 / 2950
2006 Combined Radium (-226 and -228) MR 2 SDWIS / CT0261031 / 4010
2006 Gross Alpha, Excl. Radon and U MR 2 SDWIS / CT0261031 / 4000
2006 Combined Uranium MR 2 SDWIS / CT0261031 / 4006
2005 Cadmium MR 4 SDWIS / CT0261031 / 1015
2005 Chromium MR 4 SDWIS / CT0261031 / 1020
2005 Antimony, Total MR 4 SDWIS / CT0261031 / 1074
2005 Beryllium, Total MR 4 SDWIS / CT0261031 / 1075
2005 Thallium, Total MR 4 SDWIS / CT0261031 / 1085
2005 Selenium MR 4 SDWIS / CT0261031 / 1045

How Ctwc - Shoreline Region-Chester System Compares

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

Metric Ctwc - Shoreline Region-Chester System Connecticut avg Federal benchmark
Total violations 156 88.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 5,030 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 Ctwc - Shoreline Region-Chester System water safe to drink? ▼
Ctwc - Shoreline Region-Chester System (PWS ID: CT0261031) has 156 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,030 people using Surface Water sources.
How many people does Ctwc - Shoreline Region-Chester System serve? ▼
Ctwc - Shoreline Region-Chester System serves 5,030 people in Clinton, Connecticut. It is a Private-owned system using Surface Water water sources with 2,620 service connections.
What type of violations does Ctwc - Shoreline Region-Chester System have? ▼
Ctwc - Shoreline Region-Chester System has 156 total violations: 0 health-based violations (MCL exceedances or treatment failures), 156 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ctwc - Shoreline Region-Chester System water? ▼
No. Ctwc - Shoreline Region-Chester System was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Ctwc - Shoreline Region-Chester System use? ▼
Ctwc - Shoreline Region-Chester System uses Surface Water 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. 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.

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.