Public water system · IL0651000
ActiveHamilton County Water District
At a glance
Hamilton County Water District (PWSID IL0651000) is an active community water system in Hamilton County, Illinois. It reports serving 3,958 people through 1,583 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in March 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,958
Service connections
1,583
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Hamilton County Water District compare with other water systems in Hamilton County?
By EPA's size categories, Hamilton County Water District is a medium system (3,301 to 10,000 people). Hamilton County has 4 active public water systems, and Hamilton County Water District is the largest of them by population served. Its population served is about twice the county average of 1,966 people per system, and accounts for 50% of the 7,864 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 Hamilton County Water District is about 41% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 619 Illinois systems (16%) list purchased surface water as their primary source.
Who owns and regulates Hamilton County Water District?
EPA lists Hamilton County Water District 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. 4 of the 4 active systems in Hamilton County (100%) are also owned by a local government.
Does Hamilton County Water District have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in March 2021. The violations listed here began between August 1993 and March 2021. By type: 5 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 as resolved and 1 as archived. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-03-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-03-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2016-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chloraminecode 1006 | No | Resolved |
| 1993-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 5 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.
Hamilton County Water District: frequently asked questions
Who runs Hamilton County Water District?
Hamilton County Water District (PWSID IL0651000) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Hamilton County Water District serve?
Hamilton County Water District reports serving 3,958 people through 1,583 service connections in Hamilton County, Illinois.
Where does Hamilton County Water District 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 Hamilton County Water District have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in March 2021. 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 Hamilton County Water District'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 5 violations for this system; none is health-based, and the most recent began in March 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Hamilton County Water District's water quality report?
As a community water system, Hamilton County Water District 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 Hamilton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mcleansboro | Hamilton | 2,812 | Community | Purchased surface water |
| Dahlgren | Hamilton | 859 | Community | Purchased surface water |
| Broughton Water District | Hamilton | 235 | Community | Purchased 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, “Hamilton County Water District, PWSID IL0651000, Illinois”, https://aquacensus.com/water-systems/illinois/hamilton-county-water-district-il0651000 (data as of October 1, 2026).