Public water system · IL1895600
ActiveWashington County Water Company
At a glance
Washington County Water Company (PWSID IL1895600) is an active community water system in Washington County, Illinois. It reports serving 11,374 people through 4,762 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
11,374
Service connections
4,762
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Washington County Water Company compare with other water systems in Washington County?
By EPA's size categories, Washington County Water Company is a large system (10,001 to 100,000 people). Washington County has 15 active public water systems, and Washington County Water Company is the largest of them by population served. Its population served is about 8.3 times the county average of 1,367 people per system, and accounts for 55% of the 20,507 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 Washington County Water Company is about 70% above 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 Washington County Water Company?
EPA lists Washington County Water Company as privately owned. 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. 6 of the 15 active systems in Washington County (40%) are also privately owned.
Does Washington County Water Company have drinking water violations?
EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in July 2025. The violations listed here began between February 1994 and July 2025. By type: 3 monitoring and reporting, 3 contaminant level above the legal limit, 1 reporting and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 as archived, 3 as resolved and 1 as unaddressed. 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. 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2018-01-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2002-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2000-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2000-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 8 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.
Washington County Water Company: frequently asked questions
Who runs Washington County Water Company?
Washington County Water Company (PWSID IL1895600) is a community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Washington County Water Company serve?
Washington County Water Company reports serving 11,374 people through 4,762 service connections in Washington County, Illinois.
Where does Washington County Water Company 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 Washington County Water Company have any drinking water violations?
EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in July 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 Washington County Water Company'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 8 violations for this system; 4 are health-based, and the most recent began in July 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 Washington County Water Company's water quality report?
As a community water system, Washington County Water Company 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 Washington County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Nashville | Washington | 3,230 | Community | Surface water |
| Okawville | Washington | 1,457 | Community | Purchased surface water |
| Irvington | Washington | 1,081 | Community | Purchased surface water |
| Hoyleton Rwc | Washington | 1,020 | Community | Purchased surface water |
| Hoyleton | Washington | 658 | Community | Purchased surface water |
| Ashley | Washington | 565 | Community | Purchased surface water |
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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, “Washington County Water Company, PWSID IL1895600, Illinois”, https://aquacensus.com/water-systems/illinois/washington-county-water-company-il1895600 (data as of October 1, 2026).