Public water system · IL1230100
ActiveLacon
At a glance
Lacon (PWSID IL1230100) is an active community water system in Marshall County, Illinois. It reports serving 1,878 people through 958 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in April 2004.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,878
Service connections
958
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lacon compare with other water systems in Marshall County?
By EPA's size categories, Lacon is a small system (501 to 3,300 people). Marshall County has 20 active public water systems, and Lacon is the 2nd-largest of them by population served. Its population served is about 3.7 times the county average of 513 people per system, and accounts for 18% of the 10,259 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 Lacon 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 Lacon?
EPA lists Lacon 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. 7 of the 20 active systems in Marshall County (35%) are also owned by a local government.
Does Lacon have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in April 2004. The violations listed here began between June 1977 and April 2004. By type: 2 monitoring and reporting. The contaminants or rules involved are Pentachlorophenol and Gross alpha (excluding radon and uranium). EPA lists 1 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 |
|---|---|---|---|---|
| 2004-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | No | Resolved |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 2 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.
Lacon: frequently asked questions
Who runs Lacon?
Lacon (PWSID IL1230100) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Lacon serve?
Lacon reports serving 1,878 people through 958 service connections in Marshall County, Illinois.
Where does Lacon 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 Lacon have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in April 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 Lacon'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 2 violations for this system; none is health-based, and the most recent began in April 2004. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Lacon's water quality report?
As a community water system, Lacon 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 Marshall County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Henry | Marshall | 2,230 | Community | Groundwater |
| Toluca | Marshall | 1,348 | Community | Groundwater |
| Prairie Path Water Company-Lake Wildwood | Marshall | 1,295 | Community | Groundwater |
| Wenona | Marshall | 974 | Community | Groundwater |
| Hopewell | Marshall | 420 | Community | Groundwater |
| Midland High School | Marshall | 410 | Non-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, “Lacon, PWSID IL1230100, Illinois”, https://aquacensus.com/water-systems/illinois/lacon-il1230100 (data as of October 1, 2026).