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EAST LYME WATER & SEWER COMMISSION

PWS ID: CT0450011 · NIANTIC, Connecticut 06357

EAST LYME WATER & SEWER COMMISSION serves 15,245 people in NIANTIC, Connecticut using Surface Water water sources. It has 532 recorded EPA violations, including 24 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (6 compounds found).

Water Quality Snapshot: EAST LYME WATER & SEWER COMMISSION

EAST LYME WATER & SEWER COMMISSION is a local-owned community water system that delivers drinking water to 15,245 residents in NIANTIC, Connecticut (New London County) through 6,119 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 532 total violations for this system , of which 24 (5%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 499 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 24 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 6 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 0.0092 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. EAST LYME WATER & SEWER COMMISSION's 532 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

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

Population Served
15,245
Total Violations
532
Health-Based Violations
24
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
6,119
County
New London
School/Daycare
No
MCL Violations
24
Monitoring Violations
499
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 24 2011
Vinyl chloride MR 17 2021
1,2,4-Trichlorobenzene MR 15 2021
cis-1,2-Dichloroethylene MR 15 2021
DICHLOROMETHANE MR 15 2021
CHLOROBENZENE MR 15 2021
Benzene MR 15 2021
Ethylbenzene MR 15 2021
Styrene MR 15 2021
p-Dichlorobenzene MR 15 2021
1,1-Dichloroethylene MR 15 2021
trans-1,2-Dichloroethylene MR 15 2021
1,2-Dichloropropane MR 15 2021
1,2-Dichloroethane MR 15 2021
Carbon tetrachloride MR 15 2021
Trichloroethylene MR 15 2021
Tetrachloroethylene MR 15 2021
Toluene MR 15 2021
1,1,2-Trichloroethane MR 15 2021
1,1,1-Trichloroethane MR 15 2021
o-Dichlorobenzene MR 15 2021
Lead and Copper Rule MR 13 2016
Gross Beta Particle Activity MR 8 2007
ManMade Beta Particle and Photon Emitter MR 8 2007
Total Haloacetic Acids (HAA5) MR 8 2024
TTHM MR 8 2024
E. COLI MR 6 2018
Chlorine MR 6 2018
Coliform (TCR) MR 5 2004
Consumer Confidence Rule Other 5 2020

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 18 of 420 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 9/19/2023 <0.006 µg/L 0.006 µg/L Not Detected
4:2 FTS 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/19/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/19/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 9/19/2023 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 9/19/2023 <0.02 µg/L 0.02 µg/L Not Detected
ADONA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 9/19/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/19/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/19/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFPeS 9/19/2023 <0.004 µg/L 0.004 µg/L Not Detected
lithium 9/19/2023 <9 µg/L 9 µg/L Not Detected
PFEESA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/19/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 9/19/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 9/19/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 9/19/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/19/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/19/2023 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 9/19/2023 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 9/19/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 9/19/2023 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/13/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/13/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/13/2024 <0.008 µg/L 0.008 µg/L Not Detected
lithium 8/13/2024 <9 µg/L 9 µg/L Not Detected
PFHpS 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/13/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 8/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 8/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 8/13/2024 <0.004 µg/L 0.004 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 EAST LYME WATER & SEWER COMMISSION.

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 CT0450011 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
2024 Total Haloacetic Acids (HAA5) MR 8 SDWIS / CT0450011 / 2456
2024 TTHM MR 8 SDWIS / CT0450011 / 2950
2021 Vinyl chloride MR 17 SDWIS / CT0450011 / 2976
2021 1,2,4-Trichlorobenzene MR 15 SDWIS / CT0450011 / 2378
2021 cis-1,2-Dichloroethylene MR 15 SDWIS / CT0450011 / 2380
2021 DICHLOROMETHANE MR 15 SDWIS / CT0450011 / 2964
2021 CHLOROBENZENE MR 15 SDWIS / CT0450011 / 2989
2021 Benzene MR 15 SDWIS / CT0450011 / 2990
2021 Ethylbenzene MR 15 SDWIS / CT0450011 / 2992
2021 Styrene MR 15 SDWIS / CT0450011 / 2996
2021 p-Dichlorobenzene MR 15 SDWIS / CT0450011 / 2969
2021 1,1-Dichloroethylene MR 15 SDWIS / CT0450011 / 2977
2021 trans-1,2-Dichloroethylene MR 15 SDWIS / CT0450011 / 2979
2021 1,2-Dichloropropane MR 15 SDWIS / CT0450011 / 2983
2021 1,2-Dichloroethane MR 15 SDWIS / CT0450011 / 2980

How EAST LYME WATER & SEWER COMMISSION Compares

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

Metric EAST LYME WATER & SEWER COMMISSION Connecticut avg Federal benchmark
Total violations 532 88.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 24 9.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 6 compounds 63.5% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 15,245 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 EAST LYME WATER & SEWER COMMISSION water safe to drink? ▼
EAST LYME WATER & SEWER COMMISSION (PWS ID: CT0450011) has 532 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 6 PFAS compounds found. This system serves 15,245 people using Surface Water sources.
How many people does EAST LYME WATER & SEWER COMMISSION serve? ▼
EAST LYME WATER & SEWER COMMISSION serves 15,245 people in NIANTIC, Connecticut. It is a Local-owned system using Surface Water water sources with 6,119 service connections.
What type of violations does EAST LYME WATER & SEWER COMMISSION have? ▼
EAST LYME WATER & SEWER COMMISSION has 532 total violations: 24 health-based violations (MCL exceedances or treatment failures), 499 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in EAST LYME WATER & SEWER COMMISSION water? ▼
Yes. UCMR5 testing detected 6 PFAS compounds in EAST LYME WATER & SEWER COMMISSION's water supply: PFPeA, PFOS, PFOA, PFBS, PFHxA, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does EAST LYME WATER & SEWER COMMISSION use? ▼
EAST LYME WATER & SEWER COMMISSION 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.

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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 PlainWater Editorial