Public water system · IL1635237
ActiveAmerican Water Oper and Maintenance, LLC
At a glance
American Water Oper and Maintenance, LLC (PWSID IL1635237) is an active community water system in St. Clair County, Illinois. It reports serving 6,779 people through 286 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by the federal government. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in June 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,779
Service connections
286
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does American Water Oper and Maintenance, LLC compare with other water systems in St. Clair County?
By EPA's size categories, American Water Oper and Maintenance, LLC is a medium system (3,301 to 10,000 people). St. Clair County has 42 active public water systems, and American Water Oper and Maintenance, LLC is the 6th-largest of them by population served. Its population served is about 11% above the county average of 6,082 people per system, and accounts for 2.7% 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 American Water Oper and Maintenance, LLC is roughly in line with 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 American Water Oper and Maintenance, LLC?
EPA lists American Water Oper and Maintenance, LLC as owned by the federal 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 the federal government.
Does American Water Oper and Maintenance, LLC have drinking water violations?
EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in June 2000. The violations listed here began between January 1993 and June 2000. By type: 7 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 9 as archived and 1 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2000-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1997-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-08-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1993-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1993-03-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
All 10 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.
American Water Oper and Maintenance, LLC: frequently asked questions
Who runs American Water Oper and Maintenance, LLC?
American Water Oper and Maintenance, LLC (PWSID IL1635237) is a community water system owned by the federal government. It is regulated by the IL state drinking water program.
How many people does American Water Oper and Maintenance, LLC serve?
American Water Oper and Maintenance, LLC reports serving 6,779 people through 286 service connections in St. Clair County, Illinois.
Where does American Water Oper and Maintenance, LLC 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 American Water Oper and Maintenance, LLC have any drinking water violations?
EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in June 2000. 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 American Water Oper and Maintenance, LLC'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 10 violations for this system; 3 are health-based, and the most recent began in June 2000. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find American Water Oper and Maintenance, LLC's water quality report?
As a community water system, American Water Oper and Maintenance, LLC 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 |
| Lebanon | St. Clair | 4,714 | 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, “American Water Oper and Maintenance, LLC, PWSID IL1635237, Illinois”, https://aquacensus.com/water-systems/illinois/american-water-oper-and-maintenance-llc-il1635237 (data as of October 1, 2026).