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Community Water System · PWS WI6420297

Sparta Waterworks

Sparta, Wisconsin 54656 - drinking water served from groundwater sources to 10,025 people, tracked in EPA SDWIS and UCMR5.

10,025
People served
24
EPA violations
5
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 24 drinking-water violations at Sparta Waterworks, 21% of them health-based - below the Wisconsin per-system average.

24
Total EPA violations on record
21%
Health-based (MCL / treatment failure)
10,025
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sparta Waterworks

Sparta Waterworks is a local-owned community water system that delivers drinking water to 10,025 residents in Sparta, Wisconsin (Monroe County) through 3,112 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 24 total violations for this system , of which 5 (21%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 15 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 8 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%).

Sparta Waterworks's 24 violations sit below the Wisconsin average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
10,025
Total Violations
24
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,112
County
Monroe
School/Daycare
No
MCL Violations
4
Monitoring Violations
15
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 8 2010
Chlorine MR 4 2010
Coliform (TCR) MCL 4 2010
Lead and Copper Rule MR 3 2004
Public Notice Other 2 2008
Consumer Confidence Rule Other 1 2000
Lead and Copper Rule TT 1 2008

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 290 samples detected PFAS.

Contaminant Date Result MRL Status
8:2 FTS 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/18/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFOA 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFDoA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/18/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 6/18/2024 <6.00 ppt 6.00 ppt Not Detected
PFTA 6/18/2024 <8.00 ppt 8.00 ppt Not Detected
PFHpA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/18/2024 <2.00 ppt 2.00 ppt Not Detected
PFBA 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 6/18/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFBS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 6/18/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
ADONA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFNA 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 6/18/2024 <4.00 ppt 4.00 ppt Not Detected
PFUnA 6/18/2024 <2.00 ppt 2.00 ppt Not Detected
PFTrDA 6/18/2024 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 6/18/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 6/18/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpS 6/18/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/18/2024 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Sparta Waterworks.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WI6420297 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR, Drinking Water and Groundwater is the primacy agency that licenses and inspects Sparta Waterworks under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR, Drinking Water and Groundwater

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2010 Coliform (TCR) MR 8 SDWIS / WI6420297 / 3100
2010 Chlorine MR 4 SDWIS / WI6420297 / 0999
2010 Coliform (TCR) MCL 4 SDWIS / WI6420297 / 3100
2008 Public Notice Other 2 SDWIS / WI6420297 / 7500
2008 Lead and Copper Rule TT 1 SDWIS / WI6420297 / 5000
2004 Lead and Copper Rule MR 3 SDWIS / WI6420297 / 5000
2000 Consumer Confidence Rule Other 1 SDWIS / WI6420297 / 7000

How Sparta Waterworks Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Sparta Waterworks Wisconsin avg Federal benchmark
Total violations 24 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 10,025 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

Federal MCL reference, Safe Drinking Water Act thresholds
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Sparta Waterworks water safe to drink?
Sparta Waterworks (PWS ID: WI6420297) has 24 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 10,025 people using Groundwater sources.
How many people does Sparta Waterworks serve?
Sparta Waterworks serves 10,025 people in Sparta, Wisconsin. It is a Local-owned system using Groundwater water sources with 3,112 service connections.
What type of violations does Sparta Waterworks have?
Sparta Waterworks has 24 total violations: 5 health-based violations (MCL exceedances or treatment failures), 15 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sparta Waterworks water?
No. Sparta Waterworks was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Sparta Waterworks use?
Sparta Waterworks uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from?
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.