Public water system · CT1050254

Active

Old Lyme Library

At a glance

Old Lyme Library (PWSID CT1050254) is an active transient non-community water system in New London County, Connecticut. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, 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 July 2004.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDCT1050254

System typeTransient non-community water system

Activity statusActive

Population served25

Service connections1

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyCT state drinking water program

City servedOld Lyme

StateConnecticut

ZIP—

CountyNew London County

How does Old Lyme Library compare with other water systems in New London County?

By EPA's size categories, Old Lyme Library is a very small system (500 people or fewer). New London County has 394 active public water systems. Its population served is well below the county average of 532 people per system, and accounts for less than 0.1% 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 transient non-community water system reports serving 144 people, so Old Lyme Library is well below that figure.

What does “transient non-community water system” mean?

A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Connecticut has 1,399 active transient non-community water systems, 59% of the state's 2,363 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,263 Connecticut systems (96%) list groundwater as their primary source.

Who owns and regulates Old Lyme Library?

EPA lists Old Lyme Library 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 Old Lyme Library have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2004. The violations listed here began between April 2002 and July 2004. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (10 of them). 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
2004-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2004-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2004-01-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2003-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2003-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2003-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitritecode 1041	No	Resolved
2002-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2002-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2002-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	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.

Old Lyme Library: frequently asked questions

Who runs Old Lyme Library?

Old Lyme Library (PWSID CT1050254) is a transient non-community water system owned by a local government. It is regulated by the CT state drinking water program.

How many people does Old Lyme Library serve?

Old Lyme Library reports serving 25 people through 1 service connection in New London County, Connecticut.

Where does Old Lyme Library get its water?

EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.

Does Old Lyme Library 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 July 2004. 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 Old Lyme Library'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 July 2004. For current results, consult EPA ECHO, or the CT state drinking water program.

Where can I find Old Lyme Library's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Old Lyme Library is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

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
East Lyme Water & Sewer Commission	New London	15,245	Community	Purchased surface water
Aquarion-Mystic	New London	10,788	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, “Old Lyme Library, PWSID CT1050254, Connecticut”, https://aquacensus.com/water-systems/connecticut/old-lyme-library-ct1050254 (data as of October 1, 2026).