Public water system · IL1655030
ActiveEldorado
At a glance
Eldorado (PWSID IL1655030) is an active community water system in Saline County, Illinois. It reports serving 4,715 people through 2,100 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,715
Service connections
2,100
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Eldorado compare with other water systems in Saline County?
By EPA's size categories, Eldorado is a medium system (3,301 to 10,000 people). Saline County has 12 active public water systems, and Eldorado is the 2nd-largest of them by population served. Its population served is about 122% above the county average of 2,128 people per system, and accounts for 18% of the 25,532 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 Eldorado is about 30% 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 groundwater means the system buys groundwater from another public water system rather than drawing its own. 348 Illinois systems (9%) list purchased groundwater as their primary source.
Who owns and regulates Eldorado?
EPA lists Eldorado 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. 11 of the 12 active systems in Saline County (92%) are also owned by a local government.
Does Eldorado have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in October 2024. The violations listed here began between June 1977 and October 2024. By type: 3 monitoring and reporting, 1 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Unaddressed |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1992-10-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1992-04-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 5 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.
Eldorado: frequently asked questions
Who runs Eldorado?
Eldorado (PWSID IL1655030) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Eldorado serve?
Eldorado reports serving 4,715 people through 2,100 service connections in Saline County, Illinois.
Where does Eldorado get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Eldorado have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in October 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 Eldorado'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 5 violations for this system; 1 is health-based, and the most recent began in October 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 Eldorado's water quality report?
As a community water system, Eldorado 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 Saline County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Harrisburg | Saline | 8,524 | Community | Purchased groundwater |
| Saline Valley Conservancy District | Saline | 3,921 | Community | Groundwater |
| Carrier Mills | Saline | 2,085 | Community | Purchased groundwater |
| Mitchellsville PWD | Saline | 1,970 | Community | Purchased groundwater |
| Liberty-Ledford PWD | Saline | 1,255 | Community | Purchased groundwater |
| Prospect Water District | Saline | 1,140 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Eldorado, PWSID IL1655030, Illinois”, https://aquacensus.com/water-systems/illinois/eldorado-il1655030 (data as of October 1, 2026).