Public water system · IL1830150
ActiveCatlin
At a glance
Catlin (PWSID IL1830150) is an active community water system in Vermilion County, Illinois. It reports serving 2,380 people through 952 service connections. Its primary water source is purchased surface water, 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 August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,380
Service connections
952
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Catlin compare with other water systems in Vermilion County?
By EPA's size categories, Catlin is a small system (501 to 3,300 people). Vermilion County has 35 active public water systems, and Catlin is the 5th-largest of them by population served. Its population served is about 45% above the county average of 1,643 people per system, and accounts for 4.1% of the 57,501 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 Catlin is about 64% 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 surface water means the system buys surface water from another public water system rather than drawing its own. 619 Illinois systems (16%) list purchased surface water as their primary source.
Who owns and regulates Catlin?
EPA lists Catlin 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. 17 of the 35 active systems in Vermilion County (49%) are also owned by a local government.
Does Catlin have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in August 2025. The violations listed here began between December 1991 and August 2025. By type: 7 contaminant level above the legal limit, 2 public notice, recordkeeping or other, 1 monitoring, 1 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Nitrate (5 of them). EPA lists 10 as resolved and 2 as unaddressed. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 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 |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitrate-Nitritecode 1038 | Yes | Resolved |
| 2000-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitrate-Nitritecode 1038 | Yes | Resolved |
| 1999-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1997-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1996-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1996-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1991-12-16 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | 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.
Catlin: frequently asked questions
Who runs Catlin?
Catlin (PWSID IL1830150) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Catlin serve?
Catlin reports serving 2,380 people through 952 service connections in Vermilion County, Illinois.
Where does Catlin get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Catlin 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 August 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 Catlin'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 August 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 Catlin's water quality report?
As a community water system, Catlin 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 Vermilion County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aqua Illinois-Vermilion County | Vermilion | 30,106 | Community | Surface water |
| Hoopeston | Vermilion | 5,802 | Community | Groundwater |
| Georgetown | Vermilion | 4,200 | Community | Groundwater |
| Westville | Vermilion | 3,917 | Community | Purchased surface water |
| Prairie Path Water Company-Oakwood | Vermilion | 1,600 | Community | Surface water |
| Rossville | Vermilion | 1,331 | 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, “Catlin, PWSID IL1830150, Illinois”, https://aquacensus.com/water-systems/illinois/catlin-il1830150 (data as of October 1, 2026).