Public water system · IL1470100
ActiveCerro Gordo
At a glance
Cerro Gordo (PWSID IL1470100) is an active community water system in Piatt County, Illinois. It reports serving 1,433 people through 628 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 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
1,433
Service connections
628
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cerro Gordo compare with other water systems in Piatt County?
By EPA's size categories, Cerro Gordo is a small system (501 to 3,300 people). Piatt County has 14 active public water systems, and Cerro Gordo is the 3rd-largest of them by population served. Its population served is about 57% above the county average of 910 people per system, and accounts for 11% of the 12,740 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 Cerro Gordo 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 Cerro Gordo?
EPA lists Cerro Gordo 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. 8 of the 14 active systems in Piatt County (57%) are also owned by a local government.
Does Cerro Gordo have drinking water violations?
EPA's records list 3 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: 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Consumer Confidence Rule, Chlorine and Gross alpha (excluding radon and uranium). EPA lists 2 as resolved 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. 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 Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2007-07-01 | 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 3 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.
Cerro Gordo: frequently asked questions
Who runs Cerro Gordo?
Cerro Gordo (PWSID IL1470100) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Cerro Gordo serve?
Cerro Gordo reports serving 1,433 people through 628 service connections in Piatt County, Illinois.
Where does Cerro Gordo 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 Cerro Gordo have any drinking water violations?
EPA's records list 3 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 Cerro Gordo'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 3 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 Cerro Gordo's water quality report?
As a community water system, Cerro Gordo 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 Piatt County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Monticello | Piatt | 5,548 | Community | Groundwater |
| Bement | Piatt | 1,661 | Community | Groundwater |
| Mansfield | Piatt | 939 | Community | Groundwater |
| White Heath Waterworks | Piatt | 685 | Community | Groundwater |
| Robert Allerton Park | Piatt | 500 | Transient non-community | Groundwater |
| Hammond | Piatt | 478 | 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, “Cerro Gordo, PWSID IL1470100, Illinois”, https://aquacensus.com/water-systems/illinois/cerro-gordo-il1470100 (data as of October 1, 2026).