Public water system · IL0955040
ActiveWindwood Water System, Inc..
At a glance
Windwood Water System, Inc.. (PWSID IL0955040) is an active community water system in Knox County, Illinois. It reports serving 185 people through 74 service connections. Its primary water source is purchased groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
185
Service connections
74
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Windwood Water System, Inc.. compare with other water systems in Knox County?
By EPA's size categories, Windwood Water System, Inc.. is a very small system (500 people or fewer). Knox County has 34 active public water systems. Its population served is well below the county average of 1,442 people per system, and accounts for 0.4% of the 49,041 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 Windwood Water System, Inc.. 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. 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 Windwood Water System, Inc..?
EPA lists Windwood Water System, Inc.. 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. 15 of the 34 active systems in Knox County (44%) are also privately owned.
Does Windwood Water System, Inc.. have drinking water violations?
EPA's records list 11 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between June 1977 and July 2025. By type: 9 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Gross alpha (excluding radon and uranium) (5 of them). EPA lists 6 as archived, 4 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 |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2008-11-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-08-24 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2006-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1997-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-10-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1982-07-31 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1981-07-31 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1981-07-31 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1981-07-31 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 11 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.
Windwood Water System, Inc..: frequently asked questions
Who runs Windwood Water System, Inc..?
Windwood Water System, Inc.. (PWSID IL0955040) is a community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Windwood Water System, Inc.. serve?
Windwood Water System, Inc.. reports serving 185 people through 74 service connections in Knox County, Illinois.
Where does Windwood Water System, Inc.. 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 Windwood Water System, Inc.. have any drinking water violations?
EPA's records list 11 violations for this system; none is 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 Windwood Water System, Inc..'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 11 violations for this system; none is 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 Windwood Water System, Inc..'s water quality report?
As a community water system, Windwood Water System, Inc.. 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 Knox County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Galesburg | Knox | 31,620 | Community | Groundwater |
| Abingdon | Knox | 3,275 | Community | Purchased groundwater |
| Knoxville | Knox | 3,120 | Community | Purchased groundwater |
| I74 Spoon River Rest Area | Knox | 2,356 | Transient non-community | Groundwater |
| Aqua Illinois-Oak Run | Knox | 1,885 | Community | Groundwater |
| Wataga | Knox | 965 | 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, “Windwood Water System, Inc.., PWSID IL0955040, Illinois”, https://aquacensus.com/water-systems/illinois/windwood-water-system-inc-il0955040 (data as of October 1, 2026).