Public water system · IL1410300
ActiveLeaf River
At a glance
Leaf River (PWSID IL1410300) is an active community water system in Ogle County, Illinois. It reports serving 403 people through 204 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 October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
403
Service connections
204
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Leaf River compare with other water systems in Ogle County?
By EPA's size categories, Leaf River is a very small system (500 people or fewer). Ogle County has 102 active public water systems. Its population served is roughly in line with the county average of 412 people per system, and accounts for 1% of the 42,013 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 Leaf River 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 Leaf River?
EPA lists Leaf River 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. 15 of the 102 active systems in Ogle County (15%) are also owned by a local government.
Does Leaf River have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2025. The violations listed here began between June 1977 and October 2025. By type: 3 public notice, recordkeeping or other, 2 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 3 as unaddressed, 2 as resolved and 1 as archived. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2025-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2016-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-10-08 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | 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.
Leaf River: frequently asked questions
Who runs Leaf River?
Leaf River (PWSID IL1410300) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Leaf River serve?
Leaf River reports serving 403 people through 204 service connections in Ogle County, Illinois.
Where does Leaf River 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 Leaf River have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 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 Leaf River'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 October 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 Leaf River's water quality report?
As a community water system, Leaf River 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 Ogle County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rochelle | Ogle | 9,446 | Community | Groundwater |
| Byron | Ogle | 3,784 | Community | Groundwater |
| Oregon | Ogle | 3,449 | Community | Groundwater |
| Mount Morris | Ogle | 2,861 | Community | Groundwater |
| Polo | Ogle | 2,355 | Community | Groundwater |
| Davis Junction | Ogle | 2,344 | 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, “Leaf River, PWSID IL1410300, Illinois”, https://aquacensus.com/water-systems/illinois/leaf-river-il1410300 (data as of October 1, 2026).