Public water system · IL3058420
ActiveRest Area I-74w Mackinaw Dells
At a glance
Rest Area I-74w Mackinaw Dells (PWSID IL3058420) is an active transient non-community water system in Woodford County, Illinois. It reports serving 975 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 6 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
975
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Rest Area I-74w Mackinaw Dells compare with other water systems in Woodford County?
By EPA's size categories, Rest Area I-74w Mackinaw Dells is a small system (501 to 3,300 people). Woodford County has 58 active public water systems. Its population served is about 67% above the county average of 585 people per system, and accounts for 2.9% of the 33,910 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Rest Area I-74w Mackinaw Dells is about 6.8 times that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Illinois has 1,703 active transient non-community water systems, 44% 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 Rest Area I-74w Mackinaw Dells?
EPA lists Rest Area I-74w Mackinaw Dells as owned by a state 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 58 active systems in Woodford County (1.7%) are also owned by a state government.
Does Rest Area I-74w Mackinaw Dells have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in January 2024. The violations listed here began between July 1983 and January 2024. By type: 4 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 as resolved and 2 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 |
|---|---|---|---|---|
| 2024-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1990-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1983-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 6 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.
Rest Area I-74w Mackinaw Dells: frequently asked questions
Who runs Rest Area I-74w Mackinaw Dells?
Rest Area I-74w Mackinaw Dells (PWSID IL3058420) is a transient non-community water system owned by a state government. It is regulated by the IL state drinking water program.
How many people does Rest Area I-74w Mackinaw Dells serve?
Rest Area I-74w Mackinaw Dells reports serving 975 people through 1 service connection in Woodford County, Illinois.
Where does Rest Area I-74w Mackinaw Dells 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 Rest Area I-74w Mackinaw Dells have any drinking water violations?
EPA's records list 6 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 Rest Area I-74w Mackinaw Dells' 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 6 violations for this system; 1 is health-based, and the most recent began in January 2024. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Rest Area I-74w Mackinaw Dells' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Rest Area I-74w Mackinaw Dells is a 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 Woodford County
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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, “Rest Area I-74w Mackinaw Dells, PWSID IL3058420, Illinois”, https://aquacensus.com/water-systems/illinois/rest-area-i-74w-mackinaw-dells-il3058420 (data as of October 1, 2026).