Public water system · IL3164806
ActiveZen Leaf
At a glance
Zen Leaf (PWSID IL3164806) is an active transient non-community water system in Cook County, Illinois. It reports serving 442 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
442
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Zen Leaf compare with other water systems in Cook County?
By EPA's size categories, Zen Leaf is a very small system (500 people or fewer). Cook County has 251 active public water systems. Its population served is well below the county average of 20,993 people per system, and accounts for less than 0.1% of the 5,269,212 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 Zen Leaf is about 3.1 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 Zen Leaf?
EPA lists Zen Leaf 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. 108 of the 251 active systems in Cook County (43%) are also privately owned.
Does Zen Leaf have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Zen Leaf. For the latest compliance status, check EPA ECHO for current compliance history.
Zen Leaf: frequently asked questions
Who runs Zen Leaf?
Zen Leaf (PWSID IL3164806) is a transient non-community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Zen Leaf serve?
Zen Leaf reports serving 442 people through 1 service connection in Cook County, Illinois.
Where does Zen Leaf 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 Zen Leaf have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Zen Leaf'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Zen Leaf's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Zen Leaf 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 Cook County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Chicago | Cook | 2,721,308 | Community | Surface water |
| Cicero | Cook | 83,000 | Community | Purchased surface water |
| Schaumburg | Cook | 75,750 | Community | Purchased surface water |
| Evanston | Cook | 74,486 | Community | Surface water |
| Arlington Heights | Cook | 73,320 | Community | Purchased surface water |
| Palatine | Cook | 70,875 | Community | Purchased surface water |
Related pages
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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, “Zen Leaf, PWSID IL3164806, Illinois”, https://aquacensus.com/water-systems/illinois/zen-leaf-il3164806 (data as of October 1, 2026).