Public water system · IL1630030
ActiveSouthwestern Il Correctional Center
At a glance
Southwestern Il Correctional Center (PWSID IL1630030) is an active community water system in St. Clair County, Illinois. It reports serving 563 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
563
Service connections
1
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Southwestern Il Correctional Center compare with other water systems in St. Clair County?
By EPA's size categories, Southwestern Il Correctional Center is a small system (501 to 3,300 people). St. Clair County has 42 active public water systems. Its population served is well below the county average of 6,082 people per system, and accounts for 0.2% of the 255,459 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 Southwestern Il Correctional Center 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 Southwestern Il Correctional Center?
EPA lists Southwestern Il Correctional Center as owned by a state 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. 1 of the 42 active systems in St. Clair County (2.4%) are also owned by a state government.
Does Southwestern Il Correctional Center have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Southwestern Il Correctional Center. For the latest compliance status, check EPA ECHO for current compliance history.
Southwestern Il Correctional Center: frequently asked questions
Who runs Southwestern Il Correctional Center?
Southwestern Il Correctional Center (PWSID IL1630030) is a community water system owned by a state government. It is regulated by the IL state drinking water program.
How many people does Southwestern Il Correctional Center serve?
Southwestern Il Correctional Center reports serving 563 people through 1 service connection in St. Clair County, Illinois.
Where does Southwestern Il Correctional Center 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 Southwestern Il Correctional Center have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Southwestern Il Correctional Center'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Southwestern Il Correctional Center's water quality report?
As a community water system, Southwestern Il Correctional Center 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 St. Clair County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Il American-East St Louis | St. Clair | 131,368 | Community | Surface water |
| O Fallon | St. Clair | 46,603 | Community | Purchased surface water |
| Caseyville | St. Clair | 13,798 | Community | Purchased surface water |
| Cahokia Heights | St. Clair | 12,528 | Community | Purchased surface water |
| Mascoutah | St. Clair | 8,759 | Community | Purchased surface water |
| American Water Oper and Maintenance, LLC | St. Clair | 6,779 | 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, “Southwestern Il Correctional Center, PWSID IL1630030, Illinois”, https://aquacensus.com/water-systems/illinois/southwestern-il-correctional-center-il1630030 (data as of October 1, 2026).