Public water system · IL0735300
ActiveSunny Hill Estates Subdivision
At a glance
Sunny Hill Estates Subdivision (PWSID IL0735300) is an active community water system in Henry County, Illinois. It reports serving 375 people through 150 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
375
Service connections
150
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sunny Hill Estates Subdivision compare with other water systems in Henry County?
By EPA's size categories, Sunny Hill Estates Subdivision is a very small system (500 people or fewer). Henry County has 72 active public water systems. Its population served is about 37% below the county average of 598 people per system, and accounts for 0.9% of the 43,076 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 Sunny Hill Estates Subdivision 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,808 Illinois systems (73%) list groundwater as their primary source.
Who owns and regulates Sunny Hill Estates Subdivision?
EPA lists Sunny Hill Estates Subdivision 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. 46 of the 72 active systems in Henry County (64%) are also privately owned.
Does Sunny Hill Estates Subdivision have drinking water violations?
EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in January 2024. The violations listed here began between June 1977 and January 2024. By type: 6 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 4 as archived and 3 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 |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2001-04-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2000-03-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1977-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 7 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.
Sunny Hill Estates Subdivision: frequently asked questions
Who runs Sunny Hill Estates Subdivision?
Sunny Hill Estates Subdivision (PWSID IL0735300) is a community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Sunny Hill Estates Subdivision serve?
Sunny Hill Estates Subdivision reports serving 375 people through 150 service connections in Henry County, Illinois.
Where does Sunny Hill Estates Subdivision get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Sunny Hill Estates Subdivision have any drinking water violations?
EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in January 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 Sunny Hill Estates Subdivision'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 7 violations for this system; 1 is health-based, and the most recent began in January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Sunny Hill Estates Subdivision's water quality report?
As a community water system, Sunny Hill Estates Subdivision 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 Henry County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kewanee | Henry | 12,509 | Community | Groundwater |
| Geneseo | Henry | 6,539 | Community | Groundwater |
| Colona West | Henry | 2,640 | Community | Groundwater |
| Colona East | Henry | 2,501 | Community | Groundwater |
| Galva | Henry | 2,449 | Community | Groundwater |
| Cambridge | Henry | 2,086 | 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, “Sunny Hill Estates Subdivision, PWSID IL0735300, Illinois”, https://aquacensus.com/water-systems/illinois/sunny-hill-estates-subdivision-il0735300 (data as of October 1, 2026).