Napoleon, MO: High Radon Risk — 53/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-06-03
Monitoring data across Napoleon reveals a persistent pattern of below-average compliance in MO — multiple service areas carry documented health violations, and the data has shown little overall improvement over recent EPA reporting cycles.
How Napoleon Compares
Data: EPA SDWIS Last verified: 2026-06-03
Napoleon Water: The Quick Version
- Homes built before 1986: 59% — older plumbing may contain lead solder.
- Estimated remediation: $2,400 per household.
- CDC health risk index: 13.94 — above typical levels.
Water Systems Serving Napoleon
In Napoleon, MO, residential water supply is distributed across multiple utilities rather than concentrated in one. The 3 leading providers out of 3 tracked systems each control their own infrastructure, file separate EPA compliance reports, and set independent rate schedules.
Overview
We track water quality and home safety data for 1 ZIP code in Napoleon, Missouri (population ~498), covering 3 community water systems serving approximately 15,512 people region-wide.
No EPA violations recorded across any ZIP codes in Napoleon — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Napoleon: D (53/100)
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
Napoleon water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Napoleon
- 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 |
|---|---|---|---|
| 64074 | D | Lafayette County Pwsd 1 | 8,250 |
All ZIP Codes in Napoleon
- 64074 [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.
CDC Health Data for Napoleon
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 Napoleon's Housing Stock?
With 59% 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
Viewed through the lens of construction era, Napoleon is predominantly an older city — a median build year of 1989 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Napoleon 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.
Napoleon: Remediation Cost in Perspective
The household financial perspective in Napoleon reflects a moderate cost-to-value ratio — an equity share that is not trivially small but remains within the range where most homeowners can address documented water and safety issues by treating the expense as a real line item in property planning rather than a discretionary one.
Remediation costs are moderate relative to home values in Napoleon. The estimated $1,600–$3,300 range is manageable for most homeowners but still worth budgeting for. Home values are 34% above the Missouri average.
Protecting Children from Lead in Napoleon
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 59% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Napoleon.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Napoleon
FEMA data shows 100% of Napoleon's ZIP codes mapped into designated flood zones, paired with an NFIP record of 2 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Napoleon has a moderate flood history with 2 FEMA claims averaging $3,406 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.
What You Can Do in Napoleon
- 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 59% 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 Napoleon, MO