Stewartville, MN: High Radon Risk — 70/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Water systems in Stewartville, MN serve households with few reported safety events.
How Stewartville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Stewartville Residents
- Average lead level: 0.003 mg/L.
- Homes built before 1986: 49% — older plumbing may contain lead solder.
- Estimated remediation: $2,400 per household.
- CDC health risk index: 11.45.
Stewartville's Water Providers
The structure of water supply in Stewartville, MN is straightforward: one utility provides the bulk of residential service among 1 tracked system, concentrating rate-setting and infrastructure decisions under a single organization.
Overview
We track water quality and home safety data for 1 ZIP code in Stewartville, Minnesota, covering 1 community water system serving approximately 8,542 people.
No EPA violations recorded across any ZIP codes in Stewartville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Stewartville: B (70/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Stewartville water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0030 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 55976 | B | Stewartville | 6,850 |
All ZIP Codes in Stewartville
- 55976 [B]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Stewartville Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Stewartville Infrastructure Age
With 49% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Housing age is a practical proxy for plumbing risk because federal standards changed in 1986, when lead solder was banned from new residential construction, and again earlier — before 1970, lead pipes were themselves commonly installed. Stewartville's median build year of 1983 sits in the range where both pre- and post-1986 homes are well represented. The bar chart above reflects that mixed picture: the distribution captures pockets of older housing alongside more recent development, and those pockets carry real lead risk potential at the individual property level.
Most homes in Stewartville were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Stewartville
At current valuations, Stewartville sits in the low remediation-share tier — the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Stewartville are relatively low compared to home values. The $1,600–$3,300 estimated range is a small fraction of median property value. Home values are 16% above the Minnesota average.
Stewartville: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
After the federal action removing lead-bearing solder from new plumbing took effect, building practice shifted — but 49% of the Stewartville inventory predates that line. With aggregate samples near or beyond 0.015 mg/L, an in-home check moves out of the optional column into the standard list.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Stewartville: Flood History & Water Damage Risk
Flood insurance records under FEMA's NFIP show limited historical flood activity for Stewartville. Understanding where a community falls on the exposure spectrum matters for water quality assessment because flooding operates as a compounding hazard: during significant flood events, treatment facilities can be overwhelmed, private wells can be infiltrated by surface runoff, and pressure changes in distribution systems can allow backflow of contaminated water. None of those mechanisms are absent here, but they require event conditions that the current NFIP record suggests have been infrequent.
Stewartville has a relatively low flood history with 1 FEMA claims on record. While risk is limited, severe weather events can still impact water infrastructure.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,400</strong> remediation cost per household.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Stewartville, MN