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Community Water System · PWS WI2680624

Heaven City

Mukwonago, Wisconsin 53149 - drinking water served from groundwater sources to 106 people, tracked in EPA SDWIS and UCMR5.

106
People served
150
EPA violations
26
Health-based
Untested
UCMR5 result

The verdict

EPA records 150 drinking-water violations at Heaven City, 17% of them health-based - above the Wisconsin per-system average.

150
Total EPA violations on record
17%
Health-based (MCL / treatment failure)
106
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Heaven City

Heaven City is a private-owned community water system that delivers drinking water to 106 residents in Mukwonago, Wisconsin (Waukesha County) through 5 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 150 total violations for this system , of which 26 (17%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 113 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 20 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

Heaven City's 150 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
106
Total Violations
150
Health-Based Violations
26
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
5
County
Waukesha
School/Daycare
No
MCL Violations
26
Monitoring Violations
113
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 20 2002
Coliform (TCR) MR 12 2005
Consumer Confidence Rule Other 9 2019
Di(2-ethylhexyl) phthalate MCL 6 2006
Lead and Copper Rule MR 5 2024
Carbofuran MR 4 1994
Aldicarb MR 4 1994
Heptachlor MR 4 1994
Heptachlor epoxide MR 4 1994
Pentachlorophenol MR 4 1994
Endrin MR 4 1994
OXAMYL MR 4 1994
Simazine MR 4 1994
Picloram MR 4 1994
Aldicarb sulfoxide MR 4 1994
Dalapon MR 4 1994
Dinoseb MR 4 1994
2,4-D MR 4 1994
Total Polychlorinated Biphenyls (PCB) MR 4 1994
Chlordane MR 4 1994
Methoxychlor MR 4 1994
Toxaphene MR 4 1994
Hexachlorocyclopentadiene MR 4 1994
Aldicarb sulfone MR 4 1994
HEXACHLOROBENZENE MR 4 1994
BHC-GAMMA MR 4 1994
2,4,5-TP MR 4 1994
Atrazine MR 4 1994
LASSO MR 4 1994

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 Heaven City.

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 WI2680624 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 Heaven City 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
2024 Lead and Copper Rule MR 5 SDWIS / WI2680624 / 5000
2019 Consumer Confidence Rule Other 9 SDWIS / WI2680624 / 7000
2006 Di(2-ethylhexyl) phthalate MCL 6 SDWIS / WI2680624 / 2039
2005 Coliform (TCR) MR 12 SDWIS / WI2680624 / 3100
2002 Coliform (TCR) MCL 20 SDWIS / WI2680624 / 3100
1994 Carbofuran MR 4 SDWIS / WI2680624 / 2046
1994 Aldicarb MR 4 SDWIS / WI2680624 / 2047
1994 Heptachlor MR 4 SDWIS / WI2680624 / 2065
1994 Heptachlor epoxide MR 4 SDWIS / WI2680624 / 2067
1994 Pentachlorophenol MR 4 SDWIS / WI2680624 / 2326
1994 Endrin MR 4 SDWIS / WI2680624 / 2005
1994 OXAMYL MR 4 SDWIS / WI2680624 / 2036
1994 Simazine MR 4 SDWIS / WI2680624 / 2037
1994 Picloram MR 4 SDWIS / WI2680624 / 2040
1994 Aldicarb sulfoxide MR 4 SDWIS / WI2680624 / 2043

How Heaven City Compares

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

Metric Heaven City Wisconsin avg Federal benchmark
Total violations 150 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 26 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 106 467 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 Heaven City water safe to drink? ▼
Heaven City (PWS ID: WI2680624) has 150 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 106 people using Groundwater sources.
How many people does Heaven City serve? ▼
Heaven City serves 106 people in Mukwonago, Wisconsin. It is a Private-owned system using Groundwater water sources with 5 service connections.
What type of violations does Heaven City have? ▼
Heaven City has 150 total violations: 26 health-based violations (MCL exceedances or treatment failures), 113 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Heaven City water? ▼
No PFAS testing data is available for Heaven City under the EPA's UCMR5 monitoring program.
What water source does Heaven City use? ▼
Heaven City 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. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

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.