CITY REPORT MN

Janesville, MN Water - Home Safety Score unavailable

1 ZIP code · 3 water systems · Updated

Data: EPA SDWIS

1
ZIP Codes
3
Water Systems
0
ZIPs Linked to Systems with Violations
Zone 1
County Radon Potential (High)
$224K
Median Home Value

Key Facts for Janesville Residents

  • Average of reported 90th-percentile lead results: 0.001 mg/L.
  • Homes built before 1986: 68% - older plumbing may contain lead solder.
  • Health risk index (ZipCheckup composite of CDC data): 13.15.

Janesville's Water Providers

When a city is linked to 3 water systems, as Janesville, MN is in federal records, water in one neighborhood may come from a different system than in another. The 3 systems with the largest reported populations are shown below, and their compliance records are kept separately, so a violation logged for one does not describe the others.

Overview

We track home safety data for 1 ZIP code in Janesville, Minnesota (population ~4,203), covering 3 community water systems serving approximately 6,560 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.

Water Sources

Janesville water systems draw from: Groundwater.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0010 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status exceed the EPA lead action level

Radon Risk

1 of 1 ZIP records with known zones is in EPA Radon Zone 1.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Areas with No Violations

ZIP Code Safety Score System Population
56048 — Janesville 2,275

All ZIP Codes in Janesville

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Janesville Community Health Snapshot

10.3%
Asthma (US: 9.8%)
11.4%
Diabetes (US: 10.4%)
16.2%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 10.3% ↑
Diabetes 11.4% ↑
Mental Health 16.2% ↑

Vertical line = national average. ■ Above national · ■ Below national

Janesville Infrastructure Age

1977
Median Build Year
68%
Built Before 1986
46%
Built Before 1970
Copper
Likely Pipe Material

With 68% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

Ask the water utility whether your address in Janesville has a lead service line; its inventory can answer what a median build year of 1977 cannot.

1977
Median Year Built
68%
Pre-1986 (lead solder era; lead paint banned 1978)
46%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (46%) 1970–1986 (22%) Post-1986 (32%)

Over half of homes in Janesville were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.

Source: U.S. Census Bureau ACS B25034.

Janesville: Lead Risk & Vulnerable Populations

68%
Homes Built Before 1986
0.001
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Frequently Asked Questions

Does Janesville water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Janesville is 0.001 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How many water systems serve Janesville?
Our records map 3 water systems to 1 ZIP code in Janesville. The related population figure in our data is approximately 4,203 people; it is not a count of people served citywide.
Home → Cities → Minnesota → Janesville, MN

How to cite this page

APA ZipCheckup. (2026). Janesville, MN Water - Home Safety Score unavailable. https://zipcheckup.com/cities/mn/janesville/
BibTeX
@misc{zipcheckup-cities-mn-janesville,
  author = {{ZipCheckup}},
  title  = {{Janesville, MN Water - Home Safety Score unavailable}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/mn/janesville/}
}

Page version: October 2026.

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