Water Quality Report

Lannon, WI (53046): High Radon Potential Area

EPA data for Menomonee Falls Ww - Surface Water

High County Radon Potential

EPA records for the water systems mapped to 53046 in Lannon, WI contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources

Latest air quality, EPA records and weather alerts Current data temporarily unavailable

Current EPA violation data unavailable

Safety Score N/A

Water Quality No violations

Lead Risk Below action level 0.0021 mg/L, 90th percentile, sample period ending 2023-09-30

NFIP Claim History N/A

Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

Water No drinking-water violations in EPA records since 2021.
Lead The reported 90th-percentile lead result of 0.0021 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.

Contaminant Summary

Evidence unavailable

Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record Consumer Confidence Report: source date or period is not present in ZipCheckup's accepted source record

Water System

23,867

People Served

Health Violations (since 2021)

Surface water

Water Source

0.0021 mg/L

Reported Lead Result

Zone 1

County Radon Potential · High

$256K

Median Home Value19% above state median ($214K)

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Score Breakdown

Overall Home Safety Score: Score unavailable

Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.

Canonical components

EPA water compliance

100/100

Observed

PFAS MCL screen

Unknown

Evidence missing

EPA radon zone

0/100

Observed

Annual EPA AirData AQI

100/100

Observed

Required domains

Drinking water

Unknown

Indoor environment

0/100

Outdoor environment

100/100

Coverage: 3 of 4 components and 2 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (7) HIGH

Your Water System

ZIP code 53046 in Lannon, Wisconsin is mapped to the water system Menomonee Falls Ww - Surface Water (EPA ID: WI2680082). This system provides water to approximately 23,867 people from surface water sources.

Other Water Quality Reports in Wisconsin

53001 (Adell) - 1 violation recorded for mapped water systems
53002 (Allenton)
53003 (Ashippun)
53004 (Belgium) - 6 violations recorded for mapped water systems
53005 (Brookfield) - 8 violations recorded for mapped water systems
53006 (Brownsville) - 4 violations recorded for mapped water systems
53007 (Butler) - 2 violations recorded for mapped water systems
53008 (Brookfield)
53010 (Campbellsport) - 5 violations recorded for mapped water systems
53011 (Cascade) - 3 violations recorded for mapped water systems
53012 (Cedarburg) - 3 violations recorded for mapped water systems
53013 (Cedar Grove) - 2 violations recorded for mapped water systems
53014 (Chilton) - 2 violations recorded for mapped water systems
53015 (Cleveland) - 2 violations recorded for mapped water systems
53016 (Clyman)
53017 (Colgate) - 6 violations recorded for mapped water systems
53018 (Delafield) - 26 violations recorded for mapped water systems
53019 (Eden)
53020 (Elkhart Lake)
53021 (Fredonia) - 4 violations recorded for mapped water systems

Nearby Water Quality Reports

53051 (Menomonee Falls) - 3 mi - 10 violations recorded for mapped water systems
53052 (Menomonee Falls) - 3 mi
53089 (Sussex) - 3 mi - 42 violations recorded for mapped water systems
53017 (Colgate) - 5 mi - 6 violations recorded for mapped water systems
53022 (Germantown) - 5 mi - 4 violations recorded for mapped water systems
53007 (Butler) - 6 mi - 2 violations recorded for mapped water systems
53045 (Brookfield) - 6 mi - 22 violations recorded for mapped water systems
53224 (Milwaukee) - 7 mi
53033 (Hubertus) - 7 mi
53008 (Brookfield) - 7 mi

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Menomonee Falls Ww - Surface Water (WI2680082) on EPA.gov.

5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →

Environmental Hazards (10) HIGH

Home & Infrastructure (6) OK

Cost & Community (9) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Frequently Asked Questions

Is the tap water in 53046 safe to drink?

EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 53046 (primary system: Menomonee Falls Ww - Surface Water), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 53046's water come from?

The recorded water source for Menomonee Falls Ww - Surface Water, a system mapped to ZIP code 53046, is Surface water. This system serves approximately 23,867 people.

How can I get my water tested in Lannon?

If Menomonee Falls Ww - Surface Water supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

Is lead a concern in 53046 tap water?

The Lead and Copper Rule record selected for 53046 reports a 90th-percentile lead result of 0.0021 mg/L for a water system mapped to this ZIP (record date 2023-09-30). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 53046?

53046 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Waukesha County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

How to cite this page

APA ZipCheckup. (2026). Lannon, WI (53046): High Radon Potential Area. https://zipcheckup.com/report/53046/

BibTeX

@misc{zipcheckup-report-53046,
  author = {{ZipCheckup}},
  title  = {{Lannon, WI (53046): High Radon Potential Area}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/53046/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 53046

ZIP Code	City, State	Distance	Grade	Violations
53051	Menomonee Falls, WI	2.7 mi	C	10
53052	Menomonee Falls, WI	3.1 mi	N/A	0
53089	Sussex, WI	3.2 mi	D	42
53017	Colgate, WI	5.2 mi	N/A	6
53022	Germantown, WI	5.3 mi	N/A	4
53007	Butler, WI	5.6 mi	N/A	2
53045	Brookfield, WI	5.8 mi	C	22
53224	Milwaukee, WI	6.6 mi	B	0
53033	Hubertus, WI	6.8 mi	N/A	0
53008	Brookfield, WI	6.8 mi	N/A	0