Public water system · CT0450011
ActiveEast Lyme Water & Sewer Commission
At a glance
East Lyme Water & Sewer Commission (PWSID CT0450011) is an active community water system in New London County, Connecticut. It reports serving 15,245 people through 6,119 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
15,245
Service connections
6,119
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does East Lyme Water & Sewer Commission compare with other water systems in New London County?
By EPA's size categories, East Lyme Water & Sewer Commission is a large system (10,001 to 100,000 people). New London County has 394 active public water systems, and East Lyme Water & Sewer Commission is the 5th-largest of them by population served. Its population served is about 29 times the county average of 532 people per system, and accounts for 7.3% of the 209,444 people reported by systems filed under the county. Across Connecticut, the 2,363 active systems average 1,247 people each. Nationally, the average active community water system reports serving 6,703 people, so East Lyme Water & Sewer Commission is about 127% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Connecticut has 481 active community water systems, 20% of the state's 2,363 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 52 Connecticut systems (2.2%) list purchased surface water as their primary source.
Who owns and regulates East Lyme Water & Sewer Commission?
EPA lists East Lyme Water & Sewer Commission as owned by a local government. The CT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 64 of the 394 active systems in New London County (16%) are also owned by a local government.
Does East Lyme Water & Sewer Commission have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. The violations listed here began between January 2021 and October 2024. By type: 12 monitoring and reporting. The contaminants or rules involved are Haloacetic acids (HAA5), Total trihalomethanes (TTHM), Ethylbenzene and 1,1,2-Trichloroethane. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2024-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
East Lyme Water & Sewer Commission: frequently asked questions
Who runs East Lyme Water & Sewer Commission?
East Lyme Water & Sewer Commission (PWSID CT0450011) is a community water system owned by a local government. It is regulated by the CT state drinking water program.
How many people does East Lyme Water & Sewer Commission serve?
East Lyme Water & Sewer Commission reports serving 15,245 people through 6,119 service connections in New London County, Connecticut.
Where does East Lyme Water & Sewer Commission get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does East Lyme Water & Sewer Commission have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is East Lyme Water & Sewer Commission's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the CT state drinking water program.
Where can I find East Lyme Water & Sewer Commission's water quality report?
As a community water system, East Lyme Water & Sewer Commission must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in New London County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Norwich Public Utilities | New London | 36,163 | Community | Surface water |
| Groton Utilities | New London | 30,200 | Community | Surface water |
| New London Dept. of Public Utilities | New London | 27,620 | Community | Surface water |
| Waterford Wpca | New London | 16,578 | Community | Purchased surface water |
| Aquarion-Mystic | New London | 10,788 | Community | Surface water |
| Jewett City Water Company | New London | 6,840 | Community | Surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “East Lyme Water & Sewer Commission, PWSID CT0450011, Connecticut”, https://aquacensus.com/water-systems/connecticut/east-lyme-water-sewer-commission-ct0450011 (data as of October 1, 2026).