Public water system · IL1370050
ActiveChapin
At a glance
Chapin (PWSID IL1370050) is an active community water system in Morgan County, Illinois. It reports serving 658 people through 263 service connections. Its primary water source is purchased groundwater under influence, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
658
Service connections
263
Primary source
GUP
Purchased groundwater under influence
System type
CWS
Community water system
System record
How does Chapin compare with other water systems in Morgan County?
By EPA's size categories, Chapin is a small system (501 to 3,300 people). Morgan County has 17 active public water systems. Its population served is well below the county average of 2,150 people per system, and accounts for 1.8% of the 36,545 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 Chapin 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. Purchased groundwater under the influence of surface water means the system buys that kind of water from another public water system. 4 Illinois systems (0.1%) list purchased groundwater under influence as their primary source.
Who owns and regulates Chapin?
EPA lists Chapin 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. 12 of the 17 active systems in Morgan County (71%) are also owned by a local government.
Does Chapin have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in April 2025. The violations listed here began between June 1977 and April 2025. By type: 9 monitoring and reporting, 2 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Chlorine (6 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2025-04-02 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2020-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2017-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2012-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2011-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2011-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2004-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
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.
Chapin: frequently asked questions
Who runs Chapin?
Chapin (PWSID IL1370050) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Chapin serve?
Chapin reports serving 658 people through 263 service connections in Morgan County, Illinois.
Where does Chapin get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater under influence. Purchased groundwater under the influence of surface water means the system buys that kind of water from another public water system.
Does Chapin have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in April 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 Chapin'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, one is health-based, and the most recent began in April 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 Chapin's water quality report?
As a community water system, Chapin 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 Morgan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Jacksonville | Morgan | 19,903 | Community | Surface water |
| South Jacksonville | Morgan | 3,501 | Community | Groundwater |
| Smg Water Coop | Morgan | 3,110 | Community | Purchased surface water |
| North Morgan Water Coop | Morgan | 2,763 | Community | Purchased surface water |
| Murrayville-Woodson Water Commission | Morgan | 1,403 | Community | Purchased surface water |
| Waverly | Morgan | 1,194 | 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, “Chapin, PWSID IL1370050, Illinois”, https://aquacensus.com/water-systems/illinois/chapin-il1370050 (data as of October 1, 2026).