Public water system · IL3112201
ActiveConstellation Clinton Power Station
At a glance
Constellation Clinton Power Station (PWSID IL3112201) is an active non-transient non-community water system in De Witt County, Illinois. It reports serving 515 people through 1 service connection. Its primary water source is surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
515
Service connections
1
Primary source
SW
Surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Constellation Clinton Power Station compare with other water systems in De Witt County?
By EPA's size categories, Constellation Clinton Power Station is a small system (501 to 3,300 people). De Witt County has 14 active public water systems, and Constellation Clinton Power Station is the 3rd-largest of them by population served. Its population served is about 42% below the county average of 884 people per system, and accounts for 4.2% of the 12,370 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Constellation Clinton Power Station is about 20% above that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Illinois has 396 active non-transient non-community water systems, 10% of the state's 3,872 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 89 Illinois systems (2.3%) list surface water as their primary source.
Who owns and regulates Constellation Clinton Power Station?
EPA lists Constellation Clinton Power Station 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. 5 of the 14 active systems in De Witt County (36%) are also privately owned.
Does Constellation Clinton Power Station have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 2024. The violations listed here began between July 2007 and December 2024. By type: 7 monitoring and reporting, 3 required treatment not met, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Interim Enhanced Surface Water Treatment Rule (4 of them). EPA lists 11 as resolved and 1 as archived. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-12-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2024-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzo(a)pyrenecode 2306 | No | Archived |
| 2021-06-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2020-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-07-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2014-07-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2010-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2010-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2007-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
The 12 most recent 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.
Constellation Clinton Power Station: frequently asked questions
Who runs Constellation Clinton Power Station?
Constellation Clinton Power Station (PWSID IL3112201) is a non-transient non-community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Constellation Clinton Power Station serve?
Constellation Clinton Power Station reports serving 515 people through 1 service connection in De Witt County, Illinois.
Where does Constellation Clinton Power Station get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Constellation Clinton Power Station have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 2024. 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 Constellation Clinton Power Station'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. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in December 2024. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Constellation Clinton Power Station's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Constellation Clinton Power Station is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in De Witt County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Clinton | De Witt | 7,200 | Community | Groundwater |
| Farmer City | De Witt | 1,811 | Community | Groundwater |
| Wapella | De Witt | 513 | Community | Groundwater |
| Mascoutin Sra | De Witt | 500 | Transient non-community | Groundwater |
| Weldon | De Witt | 404 | Community | Groundwater |
| Kenney | De Witt | 400 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Constellation Clinton Power Station, PWSID IL3112201, Illinois”, https://aquacensus.com/water-systems/illinois/constellation-clinton-power-station-il3112201 (data as of October 1, 2026).