Public water system · IL0930250
ActiveYorkville
At a glance
Yorkville (PWSID IL0930250) is an active community water system in Kendall County, Illinois. It reports serving 23,000 people through 8,695 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in October 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
23,000
Service connections
8,695
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Yorkville compare with other water systems in Kendall County?
By EPA's size categories, Yorkville is a large system (10,001 to 100,000 people). Kendall County has 47 active public water systems, and Yorkville is the 2nd-largest of them by population served. Its population served is about 13 times the county average of 1,747 people per system, and accounts for 28% of the 82,105 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 Yorkville is about 3.4 times 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 Yorkville?
EPA lists Yorkville 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. 9 of the 47 active systems in Kendall County (19%) are also owned by a local government.
Does Yorkville have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in October 2021. The violations listed here began between January 2006 and October 2021. By type: 7 contaminant level above the legal limit, 3 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Combined Radium (-226 and -228) (5 of them). EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2020-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2016-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Resolved |
| 2006-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 2006-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 2006-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Resolved |
| 2006-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 2006-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Resolved |
| 2006-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Resolved |
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.
Yorkville: frequently asked questions
Who runs Yorkville?
Yorkville (PWSID IL0930250) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Yorkville serve?
Yorkville reports serving 23,000 people through 8,695 service connections in Kendall County, Illinois.
Where does Yorkville 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 Yorkville have any drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in October 2021. 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 Yorkville'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, 7 are health-based, and the most recent began in October 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Yorkville's water quality report?
As a community water system, Yorkville 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 Kendall County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oswego | Kendall | 38,169 | Community | Groundwater |
| Plano | Kendall | 12,600 | Community | Groundwater |
| Il American-Valley Marina | Kendall | 1,102 | Community | Groundwater |
| Newark | Kendall | 986 | Community | Groundwater |
| Silver Springs State Park (94185) | Kendall | 750 | Transient non-community | Groundwater |
| Harvest Baptist Church Well 3 | Kendall | 600 | 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, “Yorkville, PWSID IL0930250, Illinois”, https://aquacensus.com/water-systems/illinois/yorkville-il0930250 (data as of October 1, 2026).