Public water system · IL0110500

Active

Lamoille

At a glance

Lamoille (PWSID IL0110500) is an active community water system in Bureau County, Illinois. It reports serving 660 people through 347 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2025.

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

Population served

660

Service connections

347

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDIL0110500

System typeCommunity water system

Activity statusActive

Population served660

Service connections347

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyIL state drinking water program

City servedLa Moille

StateIllinois

ZIP—

CountyBureau County

How does Lamoille compare with other water systems in Bureau County?

By EPA's size categories, Lamoille is a small system (501 to 3,300 people). Bureau County has 52 active public water systems. Its population served is about 20% above the county average of 551 people per system, and accounts for 2.3% of the 28,670 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active community water system reports serving 6,703 people, so Lamoille is well below 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. Illinois has 1,773 active community water systems, 46% of the state's 3,872 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,808 Illinois systems (73%) list groundwater as their primary source.

Who owns and regulates Lamoille?

EPA lists Lamoille as owned by a local government. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 22 of the 52 active systems in Bureau County (42%) are also owned by a local government.

Does Lamoille have drinking water violations?

EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2025. The violations listed here began between June 1977 and August 2025. By type: 7 monitoring and reporting, 1 required treatment not met, 1 reporting and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 7 as resolved, 2 as archived and 1 as unaddressed. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2025-08-31	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Unaddressed
2023-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2019-12-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2011-01-02	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
1997-01-01	Monitoring and reportingWater Quality Parameter M/R · code 53	Lead and Copper Rulecode 5000	No	Resolved
1996-07-01	Monitoring and reportingWater Quality Parameter M/R · code 53	Lead and Copper Rulecode 5000	No	Resolved
1992-12-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
1977-06-30	Monitoring and reportingMonitoring, Regular · code 03	Gross alpha (excluding radon and uranium)code 4000	No	Archived

All 10 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.

Lamoille: frequently asked questions

Who runs Lamoille?

Lamoille (PWSID IL0110500) is a community water system owned by a local government. It is regulated by the IL state drinking water program.

How many people does Lamoille serve?

Lamoille reports serving 660 people through 347 service connections in Bureau County, Illinois.

Where does Lamoille 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 Lamoille have any drinking water violations?

EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2025. 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 Lamoille'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. EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in August 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.

Where can I find Lamoille's water quality report?

As a community water system, Lamoille 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 Bureau County

Water system	County	Population served	Type	Source
Princeton	Bureau	7,832	Community	Groundwater
Spring Valley	Bureau	5,582	Community	Groundwater
De Pue	Bureau	1,838	Community	Groundwater
Walnut	Bureau	1,311	Community	Groundwater
Ladd	Bureau	1,263	Community	Groundwater
The Great Sauk Trail - East	Bureau	900	Transient non-community	Groundwater

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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, “Lamoille, PWSID IL0110500, Illinois”, https://aquacensus.com/water-systems/illinois/lamoille-il0110500 (data as of October 1, 2026).