Public water system · IL1090030
ActiveWest Prairie Water Co-Op
At a glance
West Prairie Water Co-Op (PWSID IL1090030) is an active community water system in McDonough County, Illinois. It reports serving 2,395 people through 958 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in October 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,395
Service connections
958
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does West Prairie Water Co-Op compare with other water systems in McDonough County?
By EPA's size categories, West Prairie Water Co-Op is a small system (501 to 3,300 people). McDonough County has 21 active public water systems, and West Prairie Water Co-Op is the 4th-largest of them by population served. Its population served is about 51% above the county average of 1,588 people per system, and accounts for 7.2% of the 33,349 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 West Prairie Water Co-Op 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 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 West Prairie Water Co-Op?
EPA lists West Prairie Water Co-Op 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. 12 of the 21 active systems in McDonough County (57%) are also owned by a local government.
Does West Prairie Water Co-Op have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in October 2021. The violations listed here began between October 2021 and October 2021. By type: 2 monitoring and reporting. The contaminants or rules involved are Total trihalomethanes (TTHM) and Haloacetic acids (HAA5). EPA lists 2 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
All 2 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.
West Prairie Water Co-Op: frequently asked questions
Who runs West Prairie Water Co-Op?
West Prairie Water Co-Op (PWSID IL1090030) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does West Prairie Water Co-Op serve?
West Prairie Water Co-Op reports serving 2,395 people through 958 service connections in McDonough County, Illinois.
Where does West Prairie Water Co-Op 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 West Prairie Water Co-Op have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in October 2021. 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 West Prairie Water Co-Op'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 2 violations for this system; none is health-based, and the most recent began in October 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find West Prairie Water Co-Op's water quality report?
As a community water system, West Prairie Water Co-Op 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 McDonough County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Macomb | McDonough | 15,051 | Community | Surface water |
| Western Illinois University | McDonough | 8,000 | Community | Purchased surface water |
| Bushnell | McDonough | 2,972 | Community | Groundwater |
| Colchester | McDonough | 1,395 | Community | Purchased surface water |
| Blandinsville | McDonough | 569 | Community | Surface water |
| Good Hope | McDonough | 536 | 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, “West Prairie Water Co-Op, PWSID IL1090030, Illinois”, https://aquacensus.com/water-systems/illinois/west-prairie-water-co-op-il1090030 (data as of October 1, 2026).