Public water system · WI2683099

Active

Cornerstone Church

At a glance

Cornerstone Church (PWSID WI2683099) is an active transient non-community water system in Waukesha County, Wisconsin. It reports serving 202 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2005.

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

Population served

202

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDWI2683099

System typeTransient non-community water system

Activity statusActive

Population served202

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyWI state drinking water program

City servedDelafield

StateWisconsin

ZIP—

CountyWaukesha County

How does Cornerstone Church compare with other water systems in Waukesha County?

By EPA's size categories, Cornerstone Church is a very small system (500 people or fewer). Waukesha County has 589 active public water systems. Its population served is about 63% below the county average of 549 people per system, and accounts for less than 0.1% of the 323,265 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Cornerstone Church is about 40% above 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. Wisconsin has 9,112 active transient non-community water systems, 82% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.

Who owns and regulates Cornerstone Church?

EPA lists Cornerstone Church as privately owned. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 452 of the 589 active systems in Waukesha County (77%) are also privately owned.

Does Cornerstone Church have drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2005. The violations listed here began between January 2002 and January 2005. By type: 6 public notice, recordkeeping or other, 5 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Public Notice (6 of them). EPA lists 7 as resolved and 5 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
2005-01-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2004-10-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived
2004-10-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2004-07-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived
2004-04-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2004-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived
2004-01-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2003-10-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived
2003-10-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2003-07-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Archived
2003-04-16	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2002-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	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.

Cornerstone Church: frequently asked questions

Who runs Cornerstone Church?

Cornerstone Church (PWSID WI2683099) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.

How many people does Cornerstone Church serve?

Cornerstone Church reports serving 202 people through 1 service connection in Waukesha County, Wisconsin.

Where does Cornerstone Church 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 Cornerstone Church have any drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2005. 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 Cornerstone Church'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, one is health-based, and the most recent began in January 2005. For current results, consult EPA ECHO, or the WI state drinking water program.

Where can I find Cornerstone Church's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Cornerstone Church 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 Waukesha County

Water system	County	Population served	Type	Source
Waukesha Water Utility	Waukesha	70,718	Community	Purchased surface water
Brookfield Water Utility	Waukesha	29,070	Community	Groundwater
New Berlin Water Utility	Waukesha	27,899	Community	Purchased surface water
Menomonee Falls Ww - Surface Water	Waukesha	23,867	Community	Purchased surface water
Oconomowoc Waterworks	Waukesha	15,805	Community	Groundwater
Sussex Village Hall & Water Utility	Waukesha	11,750	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, “Cornerstone Church, PWSID WI2683099, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/cornerstone-church-wi2683099 (data as of October 1, 2026).