Ballwin, MO: High Radon Risk — 40/100 (2026)
4 ZIP codes · 6 water systems · Updated 2026-06-03
Water compliance in Ballwin, MO ranks below average — documented gaps in multiple service areas.
How Ballwin Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Ballwin Residents
- Estimated remediation: $2,200 per household.
- CDC health risk index: 12.49 — above typical levels.
Ballwin's Water Providers
At present, 3 utilities serve the bulk of Ballwin, MO's residential water connections out of 6 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 4 ZIP codes in Ballwin, Missouri (population ~92,571), covering 6 community water systems serving approximately 1,112,833 people region-wide.
No EPA violations recorded across any ZIP codes in Ballwin — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Ballwin: 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
Ballwin water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Ballwin
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 4 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 63011 | D | MO AMERICAN ST LOUIS ST CHARLES COUNTIES | 1,111,000 |
| 63021 | D | MO AMERICAN ST LOUIS ST CHARLES COUNTIES | 1,111,000 |
| 63022 | D | MO AMERICAN ST LOUIS ST CHARLES COUNTIES | 1,111,000 |
| 63024 | D | MO AMERICAN ST LOUIS ST CHARLES COUNTIES | 1,111,000 |
All ZIP Codes in Ballwin
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.
Ballwin 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
How Remediation Costs Compare in Ballwin
For most homeowners in Ballwin, the estimated cost of water and safety remediation represents a proportionally modest share of what properties are worth — placing this area in the lower tier of the remediation share scale.
Remediation costs in Ballwin are relatively low compared to home values. The $1,450–$2,975 estimated range is a small fraction of median property value. Home values are 113% above the Missouri average.
Ballwin: Flood History & Water Damage Risk
Over the multi-decade window covered by the National Flood Insurance Program, Ballwin has accumulated 242 claims — a total that suggests more than isolated flood exposure. With 50% of ZIP codes in designated flood zones, the water-quality implications of flooding move from hypothetical to periodically relevant: treatment intake can be compromised, wells can be infiltrated, and distribution backflow can occur.
Ballwin has a moderate flood history with 242 FEMA claims averaging $20,380 per payout. 50% 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>$2,200</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 Ballwin
- 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. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
- 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 Ballwin, MO