Minnetonka, MN: High Radon Risk — 70/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
In current tracking cycles, Minnetonka records above-average water quality outcomes for MN; compliance history over recent years shows few departures from federal standards and no systemic failures across its water systems.
How Minnetonka Compares
Data: EPA SDWIS Last verified: 2026-06-03
Minnetonka Water: The Quick Version
- Average lead level: 0.001 mg/L.
- Homes built before 1986: 77% — older plumbing may contain lead solder.
- Estimated remediation: $2,400 per household.
- CDC health risk index: 10.25.
Water Systems Serving Minnetonka
Water service in Minnetonka, MN is organized around a single utility — one of 1 tracked by regulator, and the one that manages the local distribution network while holding primary responsibility for EPA compliance reporting.
Overview
We track water quality and home safety data for 1 ZIP code in Minnetonka, Minnesota (population ~21,255), covering 1 community water system serving approximately 54,474 people region-wide.
No EPA violations recorded across any ZIP codes in Minnetonka — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Minnetonka: 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
Minnetonka water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0010 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 |
|---|---|---|---|
| 55345 | B | Minnetonka | 54,474 |
All ZIP Codes in Minnetonka
- 55345 [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.
CDC Health Data for Minnetonka
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
How Old Is Minnetonka's Housing Stock?
With 77% 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
Pre-1986 plumbing is not a rare legacy case in Minnetonka — it's the dominant profile. The median build year of 1978 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Minnetonka were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Minnetonka: Remediation Cost in Perspective
What does remediation cost in financial context for Minnetonka homeowners? Proportionally very little — the equity share here is low, and addressing documented issues is a manageable planning question rather than a material financial burden.
Remediation costs in Minnetonka 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 100% above the Minnesota average.
Protecting Children from Lead in Minnetonka
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.
Older interior plumbing shapes the local picture: 77% of Minnetonka homes predate the federal solder ban, and aggregate sampling either approaches or crosses the action benchmark. That mix makes a single-home draw a standard pre-purchase or pre-occupancy step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Minnetonka
How does Minnetonka's flood record connect to local water quality? The NFIP documents 6 claims — enough to signal recurring events — and 100% of ZIP codes carry FEMA flood zone status. That combination places flooding in the category of factors that can periodically affect water infrastructure, even if the area isn't among the highest-exposure communities in the NFIP dataset.
Minnetonka has a moderate flood history with 6 FEMA claims averaging $11,215 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Minnetonka, MN