Public water system · IL1710350
ActiveWinchester
At a glance
Winchester (PWSID IL1710350) is an active community water system in Scott County, Illinois. It reports serving 1,589 people through 820 service connections. Its primary water source is groundwater, 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 July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,589
Service connections
820
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Winchester compare with other water systems in Scott County?
By EPA's size categories, Winchester is a small system (501 to 3,300 people). Scott County has 7 active public water systems, and Winchester is the largest of them by population served. Its population served is about 150% above the county average of 635 people per system, and accounts for 36% of the 4,447 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 Winchester 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 Winchester?
EPA lists Winchester 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 7 active systems in Scott County (57%) are also owned by a local government.
Does Winchester have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2023. The violations listed here began between June 1977 and July 2023. By type: 4 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Consumer Confidence Rule, Lead and Copper Rule, Nitrate and Total coliform bacteria (TCR). EPA lists 3 as resolved and 2 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 |
|---|---|---|---|---|
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2020-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1996-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | 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 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.
Winchester: frequently asked questions
Who runs Winchester?
Winchester (PWSID IL1710350) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Winchester serve?
Winchester reports serving 1,589 people through 820 service connections in Scott County, Illinois.
Where does Winchester 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 Winchester have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2023. 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 Winchester'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 July 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Winchester's water quality report?
As a community water system, Winchester 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 Scott County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Exeter-Merritt Water Coop | Scott | 820 | Community | Purchased groundwater |
| Bluffs | Scott | 748 | Community | Groundwater |
| Scott County Rural Water Co-Op | Scott | 493 | Community | Purchased groundwater |
| Alsey-Glasgow Water Commission | Scott | 475 | Community | Purchased groundwater |
| Manchester | Scott | 297 | Community | Purchased surface water |
| Evandys Boatel | Scott | 25 | 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, “Winchester, PWSID IL1710350, Illinois”, https://aquacensus.com/water-systems/illinois/winchester-il1710350 (data as of October 1, 2026).