Public water system · IL3147991

Active

The Chapel

At a glance

The Chapel (PWSID IL3147991) is an active non-transient non-community water system in Cook County, Illinois. It reports serving 213 people through 10 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 January 2026.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

213

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDIL3147991

System typeNon-transient non-community water system

Activity statusActive

Population served213

Service connections10

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyIL state drinking water program

City served—

StateIllinois

ZIP—

CountyCook County

How does The Chapel compare with other water systems in Cook County?

By EPA's size categories, The Chapel 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 non-transient non-community water system reports serving 430 people, so The Chapel is about half of 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. 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 The Chapel?

EPA lists The Chapel 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 The Chapel have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2026. The violations listed here began between January 2026 and January 2026. By type: 12 monitoring and reporting. The contaminants or rules involved are Atrazine, Simazine, Di(2-ethylhexyl) phthalate and Hexachlorobenzene. EPA lists 12 as archived. 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
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Atrazinecode 2050	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Simazinecode 2037	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Di(2-ethylhexyl) phthalatecode 2039	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Hexachlorobenzenecode 2274	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Di(2-ethylhexyl) adipatecode 2035	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Methoxychlorcode 2015	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Endrincode 2005	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Alachlor (Lasso)code 2051	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Hexachlorocyclopentadienecode 2042	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Lindane (gamma-BHC)code 2010	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Heptachlorcode 2065	No	Archived
2026-01-01	Monitoring and reportingMonitoring, Regular · code 03	Heptachlor epoxidecode 2067	No	Archived

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.

The Chapel: frequently asked questions

Who runs The Chapel?

The Chapel (PWSID IL3147991) is a non-transient non-community water system privately owned. It is regulated by the IL state drinking water program.

How many people does The Chapel serve?

The Chapel reports serving 213 people through 10 service connections in Cook County, Illinois.

Where does The Chapel 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 The Chapel 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 January 2026. 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 The Chapel'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 January 2026. For current results, consult EPA ECHO, or the IL state drinking water program.

Where can I find The Chapel's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. The Chapel 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 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

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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, “The Chapel, PWSID IL3147991, Illinois”, https://aquacensus.com/water-systems/illinois/the-chapel-il3147991 (data as of October 1, 2026).