Public water system · WI2680504

Active

Sendiks

At a glance

Sendiks (PWSID WI2680504) is an active non-transient non-community water system in Waukesha County, Wisconsin. It reports serving 310 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, 3 are health-based, and the most recent began in February 2012.

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

Population served

310

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDWI2680504

System typeNon-transient non-community water system

Activity statusActive

Population served310

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyWI state drinking water program

City servedElm Grove

StateWisconsin

ZIP—

CountyWaukesha County

How does Sendiks compare with other water systems in Waukesha County?

By EPA's size categories, Sendiks is a very small system (500 people or fewer). Waukesha County has 589 active public water systems. Its population served is about 44% 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 non-transient non-community water system reports serving 430 people, so Sendiks is about 28% below 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. Wisconsin has 891 active non-transient non-community water systems, 8.1% 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 Sendiks?

EPA lists Sendiks 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 Sendiks have drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in February 2012. The violations listed here began between January 2003 and February 2012. By type: 8 monitoring and reporting, 3 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). 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
2012-02-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2012-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2011-12-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2011-11-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2005-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2003-04-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	p-Dichlorobenzenecode 2969	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	Dichloromethanecode 2964	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloropropanecode 2983	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	Tetrachloroethylenecode 2987	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,1,2-Trichloroethanecode 2985	No	Resolved
2003-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2,4-Trichlorobenzenecode 2378	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.

Sendiks: frequently asked questions

Who runs Sendiks?

Sendiks (PWSID WI2680504) is a non-transient non-community water system privately owned. It is regulated by the WI state drinking water program.

How many people does Sendiks serve?

Sendiks reports serving 310 people through 1 service connection in Waukesha County, Wisconsin.

Where does Sendiks 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 Sendiks have any drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in February 2012. 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 Sendiks' 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, 3 are health-based, and the most recent began in February 2012. For current results, consult EPA ECHO, or the WI state drinking water program.

Where can I find Sendiks' water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Sendiks 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 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, “Sendiks, PWSID WI2680504, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/sendiks-wi2680504 (data as of October 1, 2026).