Public water system · IL0850500
ActiveWarren
At a glance
Warren (PWSID IL0850500) is an active community water system in Jo Daviess County, Illinois. It reports serving 1,323 people through 720 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,323
Service connections
720
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Warren compare with other water systems in Jo Daviess County?
By EPA's size categories, Warren is a small system (501 to 3,300 people). Jo Daviess County has 41 active public water systems, and Warren is the 5th-largest of them by population served. Its population served is about 3 times the county average of 435 people per system, and accounts for 7.4% of the 17,828 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 Warren 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 Warren?
EPA lists Warren 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. 10 of the 41 active systems in Jo Daviess County (24%) are also owned by a local government.
Does Warren have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between June 1977 and July 2024. By type: 4 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 4 as resolved, 1 as unaddressed 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-06-15 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2022-04-01 | 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 |
All 6 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.
Warren: frequently asked questions
Who runs Warren?
Warren (PWSID IL0850500) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Warren serve?
Warren reports serving 1,323 people through 720 service connections in Jo Daviess County, Illinois.
Where does Warren 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 Warren have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2024. 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 Warren'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 6 violations for this system; none is health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Warren's water quality report?
As a community water system, Warren 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 Jo Daviess County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Galena | Jo Daviess | 3,308 | Community | Groundwater |
| Prairie Path Water Company-Galena | Jo Daviess | 2,294 | Community | Groundwater |
| Stockton | Jo Daviess | 1,728 | Community | Groundwater |
| East Dubuque | Jo Daviess | 1,565 | Community | Groundwater |
| Prairie Path Water Company-Apple Canyon | Jo Daviess | 931 | Community | Groundwater |
| Hanover | Jo Daviess | 863 | 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, “Warren, PWSID IL0850500, Illinois”, https://aquacensus.com/water-systems/illinois/warren-il0850500 (data as of October 1, 2026).