Public water system · IL1195180
ActiveOak Grove MHP - Madison County
At a glance
Oak Grove MHP - Madison County (PWSID IL1195180) is an active community water system in Madison County, Illinois. It reports serving 138 people through 55 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 2 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
138
Service connections
55
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Oak Grove MHP - Madison County compare with other water systems in Madison County?
By EPA's size categories, Oak Grove MHP - Madison County is a very small system (500 people or fewer). Madison County has 54 active public water systems. Its population served is well below the county average of 5,082 people per system, and accounts for less than 0.1% of the 274,409 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 Oak Grove MHP - Madison County 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 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 Oak Grove MHP - Madison County?
EPA lists Oak Grove MHP - Madison County 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. 24 of the 54 active systems in Madison County (44%) are also privately owned.
Does Oak Grove MHP - Madison County have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between July 2017 and July 2025. By type: 1 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminants or rules involved are Consumer Confidence Rule and Lead and Copper Rule. 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 |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2017-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | 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.
Oak Grove MHP - Madison County: frequently asked questions
Who runs Oak Grove MHP - Madison County?
Oak Grove MHP - Madison County (PWSID IL1195180) is a community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Oak Grove MHP - Madison County serve?
Oak Grove MHP - Madison County reports serving 138 people through 55 service connections in Madison County, Illinois.
Where does Oak Grove MHP - Madison County 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 Oak Grove MHP - Madison County have any drinking water violations?
EPA's records list 2 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 Oak Grove MHP - Madison County'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 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 Oak Grove MHP - Madison County's water quality report?
As a community water system, Oak Grove MHP - Madison County 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 Madison County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Il American-Alton | Madison | 46,127 | Community | Surface water |
| Il American-Granite City | Madison | 33,572 | Community | Surface water |
| Collinsville | Madison | 29,500 | Community | Groundwater |
| Edwardsville | Madison | 26,808 | Community | Groundwater |
| Troy | Madison | 16,962 | Community | Groundwater |
| Bethalto | Madison | 15,210 | 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, “Oak Grove MHP - Madison County, PWSID IL1195180, Illinois”, https://aquacensus.com/water-systems/illinois/oak-grove-mhp-madison-county-il1195180 (data as of October 1, 2026).