Water Quality Report

Lonsdale, MN (55046): High Radon Potential Area

EPA data for Lonsdale

High County Radon Potential

EPA records for the water systems mapped to 55046 in Lonsdale, MN 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
Water records and current conditions
Current EPA violation data unavailable
Safety Score N/A
Water Quality No violations
Lead Risk Below action level 0.001 mg/L, 90th percentile, sample period ending 2025-12-31
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 0.001 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
1
Water System
3,913
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
0.001 mg/L
Reported Lead ResultBelow the national median of system results
Zone 1
County Radon Potential · High
$331K
Median Home Value50% above state median ($221K)

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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
100/100
Observed
EPA radon zone
0/100
Observed
Annual EPA AirData AQI
Unknown
Evidence missing

Required domains

Drinking water
100/100
Indoor environment
0/100
Outdoor environment
Unknown

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 55046 in Lonsdale, Minnesota is mapped to the water system Lonsdale (EPA ID: MN1660006). This system provides water to approximately 3,913 people from groundwater sources.

Lead & Copper in Your Water

The EPA requires water systems to monitor lead and copper levels under the Lead and Copper Rule.

Metal Measured Level EPA Action Level Status Sample Date or Period
Copper Action-level exceedance on record 1.3 mg/L Exceeds action level Not present in ZipCheckup accepted source data
How to read the copper row. EPA's reporting schema defines the copper CU90 code as an action-level exceedance (a system's 90th-percentile copper above the 1.3 mg/L action level), so this row reflects an exceedance on record, not a routine measurement. No copper concentration is shown because no verified unit is available for this value. A system with no copper record has not been shown to be clean: the absence of a recorded exceedance is not a measurement.

Other Water Quality Reports in Minnesota

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Lonsdale (MN1660006) on EPA.gov.

4 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 →

UCMR 5 PFAS monitoring: no reportable detections in available records

Available federal UCMR5 records for water systems mapped to ZIP code 55046 show no PFAS detections among the compounds tested, at the program's reporting levels.

The EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) required community and non-transient non-community water systems serving 3,300 or more people to test for 29 PFAS compounds and lithium between 2023 and 2025. Systems with no detections at the federal minimum reporting level had no results at or above that reporting level.

📊 EPA UCMR5 · View source →
Environmental Hazards (10) OK
Home & Infrastructure (7) 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 55046 safe to drink?

EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 55046 (primary system: Lonsdale), 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 55046's water come from?

The recorded water source for Lonsdale, a system mapped to ZIP code 55046, is Groundwater. This system serves approximately 3,913 people.

How can I get my water tested in Lonsdale?

If Lonsdale 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 55046 tap water?

The Lead and Copper Rule record selected for 55046 reports a 90th-percentile lead result of 0.001 mg/L for a water system mapped to this ZIP (record date 2025-12-31). 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 55046?

55046 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Rice 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). Lonsdale, MN (55046): High Radon Potential Area. https://zipcheckup.com/report/55046/
BibTeX 
@misc{zipcheckup-report-55046,
  author = {{ZipCheckup}},
  title  = {{Lonsdale, MN (55046): High Radon Potential Area}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/55046/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 55046

ZIP Code City, State Distance Grade Violations
55088 Webster, MN 4.2 mi N/A 0
56069 Montgomery, MN 7.7 mi N/A 0
55020 Elko New Market, MN 9.4 mi C 0
55054 Elko New Market, MN 9.4 mi N/A 0
56071 New Prague, MN 10.0 mi C 0
55019 Dundas, MN 11.5 mi N/A 2
56052 Kilkenny, MN 11.8 mi N/A 0
55021 Faribault, MN 12.7 mi N/A 3
55057 Northfield, MN 12.8 mi N/A 5
55087 Warsaw, MN 13.8 mi N/A 0

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Coverage: 15/17 risk factors Data sources →
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