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Community Water System · PWS WI1540130

Milton Waterworks

Milton, Wisconsin 53563 - drinking water served from groundwater sources to 5,588 people, tracked in EPA SDWIS and UCMR5.

5,588
People served
86
EPA violations
6
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 86 drinking-water violations at Milton Waterworks, 7% of them health-based - above the Wisconsin per-system average.

86
Total EPA violations on record
7%
Health-based (MCL / treatment failure)
5,588
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Milton Waterworks

Milton Waterworks is a local-owned community water system that delivers drinking water to 5,588 residents in Milton, Wisconsin (Rock County) through 2,069 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 86 total violations for this system , of which 6 (7%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 73 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Groundwater Rule, recorded in 6 violations (TT, health-based). 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%).

Milton Waterworks's 86 violations sit above 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
5,588
Total Violations
86
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,069
County
Rock
School/Daycare
No
MCL Violations
0
Monitoring Violations
73
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule TT 6 2018
TTHM MR 5 2019
Total Haloacetic Acids (HAA5) MR 5 2019
Xylenes, Total MR 3 2001
o-Dichlorobenzene MR 3 2001
Vinyl chloride MR 3 2001
Carbon tetrachloride MR 3 2001
Styrene MR 3 2001
Toluene MR 3 2001
Benzene MR 3 2001
CHLOROBENZENE MR 3 2001
Tetrachloroethylene MR 3 2001
Trichloroethylene MR 3 2001
1,2-Dichloroethane MR 3 2001
cis-1,2-Dichloroethylene MR 3 2001
1,2,4-Trichlorobenzene MR 3 2001
p-Dichlorobenzene MR 3 2001
DICHLOROMETHANE MR 3 2001
1,2-Dichloropropane MR 3 2001
trans-1,2-Dichloroethylene MR 3 2001
Ethylbenzene MR 3 2001
1,1-Dichloroethylene MR 3 2001
1,1,2-Trichloroethane MR 3 2001
1,1,1-Trichloroethane MR 3 2001

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 232 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 9/24/2024 <6.00 ppt 6.00 ppt Not Detected
PFTA 9/24/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/24/2024 <7.00 ppt 7.00 ppt Not Detected
PFNA 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFBS 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxS 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/24/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFEESA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
ADONA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFMBA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/24/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 9/24/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpS 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
ADONA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFMBA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/24/2024 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 9/24/2024 <2.00 ppt 2.00 ppt Not Detected
PFEESA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/24/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 9/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxA 9/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 9/24/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFTA 9/24/2024 <8.00 ppt 8.00 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 Milton 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 WI1540130 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 Milton 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
2019 TTHM MR 5 SDWIS / WI1540130 / 2950
2019 Total Haloacetic Acids (HAA5) MR 5 SDWIS / WI1540130 / 2456
2018 Groundwater Rule TT 6 SDWIS / WI1540130 / 0700
2001 Xylenes, Total MR 3 SDWIS / WI1540130 / 2955
2001 o-Dichlorobenzene MR 3 SDWIS / WI1540130 / 2968
2001 Vinyl chloride MR 3 SDWIS / WI1540130 / 2976
2001 Carbon tetrachloride MR 3 SDWIS / WI1540130 / 2982
2001 Styrene MR 3 SDWIS / WI1540130 / 2996
2001 Toluene MR 3 SDWIS / WI1540130 / 2991
2001 Benzene MR 3 SDWIS / WI1540130 / 2990
2001 CHLOROBENZENE MR 3 SDWIS / WI1540130 / 2989
2001 Tetrachloroethylene MR 3 SDWIS / WI1540130 / 2987
2001 Trichloroethylene MR 3 SDWIS / WI1540130 / 2984
2001 1,2-Dichloroethane MR 3 SDWIS / WI1540130 / 2980
2001 cis-1,2-Dichloroethylene MR 3 SDWIS / WI1540130 / 2380

How Milton Waterworks Compares

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

Metric Milton Waterworks Wisconsin avg Federal benchmark
Total violations 86 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 5,588 467 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 Milton Waterworks water safe to drink?
Milton Waterworks (PWS ID: WI1540130) has 86 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,588 people using Groundwater sources.
How many people does Milton Waterworks serve?
Milton Waterworks serves 5,588 people in Milton, Wisconsin. It is a Local-owned system using Groundwater water sources with 2,069 service connections.
What type of violations does Milton Waterworks have?
Milton Waterworks has 86 total violations: 6 health-based violations (MCL exceedances or treatment failures), 73 monitoring/reporting violations, and 6 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Milton Waterworks water?
No. Milton Waterworks was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Milton Waterworks use?
Milton 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.