Public water system · WI6420297

Active

Sparta Waterworks

At a glance

Sparta Waterworks (PWSID WI6420297) is an active community water system in Monroe County, Wisconsin. It reports serving 10,025 people through 3,112 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in August 2010.

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

Population served

10,025

Service connections

3,112

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDWI6420297

System typeCommunity water system

Activity statusActive

Population served10,025

Service connections3,112

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyWI state drinking water program

City servedSparta

StateWisconsin

ZIP—

CountyMonroe County

How does Sparta Waterworks compare with other water systems in Monroe County?

By EPA's size categories, Sparta Waterworks is a large system (10,001 to 100,000 people). Monroe County has 102 active public water systems, and Sparta Waterworks is the largest of them by population served. Its population served is about 26 times the county average of 385 people per system, and accounts for 26% of the 39,274 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so Sparta Waterworks is about 50% above that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Wisconsin has 1,053 active community water systems, 9.5% 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 Sparta Waterworks?

EPA lists Sparta Waterworks as owned by a local government. 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. 14 of the 102 active systems in Monroe County (14%) are also owned by a local government.

Does Sparta Waterworks have drinking water violations?

EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in August 2010. The violations listed here began between July 1992 and August 2010. By type: 5 monitoring and reporting, 3 public notice, recordkeeping or other, 1 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 10 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
2010-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2010-01-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2010-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2008-01-01	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2008-01-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2005-01-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2004-07-01	Monitoring and reportingWater Quality Parameter M/R · code 53	Lead and Copper Rulecode 5000	No	Resolved
2000-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1997-11-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1992-07-01	Monitoring and reportingWater Quality Parameter M/R · code 53	Lead and Copper Rulecode 5000	No	Resolved

All 10 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.

Sparta Waterworks: frequently asked questions

Who runs Sparta Waterworks?

Sparta Waterworks (PWSID WI6420297) is a community water system owned by a local government. It is regulated by the WI state drinking water program.

How many people does Sparta Waterworks serve?

Sparta Waterworks reports serving 10,025 people through 3,112 service connections in Monroe County, Wisconsin.

Where does Sparta Waterworks 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 Sparta Waterworks have any drinking water violations?

EPA's records list 10 violations for this system; 2 are health-based, and the most recent began in August 2010. 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 Sparta Waterworks' 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 10 violations for this system; 2 are health-based, and the most recent began in August 2010. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.

Where can I find Sparta Waterworks' water quality report?

As a community water system, Sparta Waterworks must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Monroe County

Water system	County	Population served	Type	Source
Fort Mccoy North Post	Monroe	10,000	Community	Groundwater
Tomah Waterworks	Monroe	9,192	Community	Groundwater
Cashton Waterworks	Monroe	1,120	Community	Groundwater
Brookwood High School	Monroe	700	Non-transient non-community	Groundwater
Norwalk Waterworks	Monroe	653	Community	Groundwater
Warrens Waterworks	Monroe	540	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, “Sparta Waterworks, PWSID WI6420297, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/sparta-waterworks-wi6420297 (data as of October 1, 2026).