Leonidas, MI: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Monitoring data across Leonidas reveals a persistent pattern of below-average compliance in MI — multiple service areas carry documented health violations, and the data has shown little overall improvement over recent EPA reporting cycles.
How Leonidas Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Leonidas Residents
- Homes built before 1986: 83% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 14.63 — above typical levels.
Leonidas's Water Providers
A single dominant system supplies most of Leonidas, MI. That utility controls infrastructure decisions, rate structures, and EPA compliance reporting for most residential addresses served across those 1 tracked system.
Overview
We track water quality and home safety data for 1 ZIP code in Leonidas, Michigan (population ~784), covering 1 community water system serving approximately 1,190 people region-wide.
No EPA violations recorded across any ZIP codes in Leonidas — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Leonidas: D (40/100)
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
Leonidas water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Leonidas
- 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 |
|---|---|---|---|
| 49066 | D | COLON | 1,190 |
All ZIP Codes in Leonidas
- 49066 [D]
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.
Leonidas 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
Leonidas Infrastructure Age
With 83% 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
When more than half a city's housing predates the 1986 federal ban on lead solder, plumbing-era lead risk becomes a citywide concern rather than an exception. Leonidas's median build year of 1946 places it squarely in that category.
Over half of homes in Leonidas 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.
How Remediation Costs Compare in Leonidas
Because property values in Leonidas comfortably exceed estimated remediation costs, the equity impact here is proportionally small.
Remediation costs in Leonidas are relatively low compared to home values. The $800–$1,500 estimated range is a small fraction of median property value. Home values are 8% below the Michigan average.
Leonidas: 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.
Even where utility-side monitoring meets Lead and Copper Rule requirements, the 83% pre-rule share in Leonidas keeps interior-plumbing variation as a household-level question that aggregate data cannot resolve.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Leonidas
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 83% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Leonidas, MI