Public water system · IL0275120
ActiveCarlyle Southwest PWD
At a glance
Carlyle Southwest PWD (PWSID IL0275120) is an active community water system in Clinton County, Illinois. It reports serving 1,815 people through 726 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 3 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
1,815
Service connections
726
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Carlyle Southwest PWD compare with other water systems in Clinton County?
By EPA's size categories, Carlyle Southwest PWD is a small system (501 to 3,300 people). Clinton County has 24 active public water systems. Its population served is about 27% above the county average of 1,428 people per system, and accounts for 5.3% of the 34,259 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 Carlyle Southwest PWD 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 Carlyle Southwest PWD?
EPA lists Carlyle Southwest 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. 18 of the 24 active systems in Clinton County (75%) are also owned by a local government.
Does Carlyle Southwest PWD have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2023. The violations listed here began between April 1995 and October 2023. By type: 2 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Haloacetic acids (HAA5), Chlorine and Atrazine. EPA lists 3 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 1995-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Atrazinecode 2050 | Yes | Resolved |
All 3 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.
Carlyle Southwest PWD: frequently asked questions
Who runs Carlyle Southwest PWD?
Carlyle Southwest PWD (PWSID IL0275120) is a community water system owned by a local government. It is regulated by the IL state drinking water program.
How many people does Carlyle Southwest PWD serve?
Carlyle Southwest PWD reports serving 1,815 people through 726 service connections in Clinton County, Illinois.
Where does Carlyle Southwest 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 Carlyle Southwest PWD have any drinking water violations?
EPA's records list 3 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 Carlyle Southwest 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 3 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 Carlyle Southwest PWD's water quality report?
As a community water system, Carlyle Southwest 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 Clinton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Breese | Clinton | 4,772 | Community | Surface water |
| New Baden | Clinton | 4,178 | Community | Purchased surface water |
| Carlyle | Clinton | 3,373 | Community | Surface water |
| Trenton | Clinton | 2,742 | Community | Purchased surface water |
| Aviston | Clinton | 2,545 | Community | Purchased surface water |
| Clinton County East PWD | Clinton | 1,950 | 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, “Carlyle Southwest PWD, PWSID IL0275120, Illinois”, https://aquacensus.com/water-systems/illinois/carlyle-southwest-pwd-il0275120 (data as of October 1, 2026).