Public water system · IL1995250
ActiveCoal Valley PWD
At a glance
Coal Valley PWD (PWSID IL1995250) is an active community water system in Williamson County, Illinois. It reports serving 4,023 people through 1,609 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,023
Service connections
1,609
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Coal Valley PWD compare with other water systems in Williamson County?
By EPA's size categories, Coal Valley PWD is a medium system (3,301 to 10,000 people). Williamson County has 25 active public water systems, and Coal Valley PWD is the 5th-largest of them by population served. Its population served is about 33% above the county average of 3,018 people per system, and accounts for 5.3% of the 75,458 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 Coal Valley PWD is about 40% 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 Coal Valley PWD?
EPA lists Coal Valley PWD 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. 20 of the 25 active systems in Williamson County (80%) are also owned by a local government.
Does Coal Valley PWD have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. The violations listed here began between June 1977 and October 2023. By type: 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as resolved and 2 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 4 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.
Coal Valley PWD: frequently asked questions
Who runs Coal Valley PWD?
Coal Valley PWD (PWSID IL1995250) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Coal Valley PWD serve?
Coal Valley PWD reports serving 4,023 people through 1,609 service connections in Williamson County, Illinois.
Where does Coal Valley PWD 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 Coal Valley PWD have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. 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 Coal Valley PWD'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 4 violations for this system; 1 is health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Coal Valley PWD's water quality report?
As a community water system, Coal Valley PWD 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 Williamson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Marion | Williamson | 16,855 | Community | Purchased surface water |
| Herrin | Williamson | 12,747 | Community | Purchased surface water |
| Lake of Egypt PWD | Williamson | 11,368 | Community | Surface water |
| Carterville | Williamson | 6,528 | Community | Purchased surface water |
| Corinth PWD | Williamson | 3,927 | Community | Purchased surface water |
| Johnston City | Williamson | 3,509 | 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, “Coal Valley PWD, PWSID IL1995250, Illinois”, https://aquacensus.com/water-systems/illinois/coal-valley-pwd-il1995250 (data as of October 1, 2026).