Public water system · IL1795750
ActiveMayfair Subdivision
At a glance
Mayfair Subdivision (PWSID IL1795750) is an active community water system in Tazewell County, Illinois. It reports serving 98 people through 39 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
98
Service connections
39
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mayfair Subdivision compare with other water systems in Tazewell County?
By EPA's size categories, Mayfair Subdivision is a very small system (500 people or fewer). Tazewell County has 83 active public water systems. Its population served is well below the county average of 1,557 people per system, and accounts for less than 0.1% of the 129,226 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 Mayfair 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 Mayfair Subdivision?
EPA lists Mayfair 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. 57 of the 83 active systems in Tazewell County (69%) are also privately owned.
Does Mayfair Subdivision have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2022. The violations listed here began between July 1993 and December 2022. By type: 12 monitoring and reporting. The contaminants or rules involved are Lead and Copper Rule, Nitrate, Total trihalomethanes (TTHM) and Haloacetic acids (HAA5). EPA lists 12 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 |
|---|---|---|---|---|
| 2022-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2020-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2020-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 1993-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | 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.
Mayfair Subdivision: frequently asked questions
Who runs Mayfair Subdivision?
Mayfair Subdivision (PWSID IL1795750) is a community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Mayfair Subdivision serve?
Mayfair Subdivision reports serving 98 people through 39 service connections in Tazewell County, Illinois.
Where does Mayfair 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 Mayfair Subdivision have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2022. 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 Mayfair 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.
Where can I find Mayfair Subdivision's water quality report?
As a community water system, Mayfair 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 Tazewell County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Il American-Pekin | Tazewell | 31,731 | Community | Groundwater |
| East Peoria | Tazewell | 22,284 | Community | Groundwater |
| Morton | Tazewell | 17,111 | Community | Groundwater |
| Washington | Tazewell | 14,793 | Community | Groundwater |
| North Tazewell PWD | Tazewell | 7,625 | Community | Groundwater |
| Creve Coeur | Tazewell | 4,934 | Community | Groundwater |
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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, “Mayfair Subdivision, PWSID IL1795750, Illinois”, https://aquacensus.com/water-systems/illinois/mayfair-subdivision-il1795750 (data as of October 1, 2026).