Cottleville, MO Water Safety: 83/100 (2026)
1 ZIP code · 5 water systems · Updated 2026-06-03
The water systems supplying Cottleville show a track record of above-average compliance with federal standards — consistently among the better performers in MO.
How Cottleville Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Cottleville Water
- Average lead level: 0.001 mg/L.
- Estimated remediation: $400 per household.
- CDC health risk index: 11.99.
Who Supplies Your Water in Cottleville
Across Cottleville, MO, residential water comes from 3 primary utilities rather than a single consolidated provider. Each system operates independently — managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 5 water systems in the area, with these top providers accounting for the majority of residential connections.
Overview
We track water quality and home safety data for 1 ZIP code in Cottleville, Missouri, covering 5 community water systems serving approximately 16,653 people.
No EPA violations recorded across any ZIP codes in Cottleville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Cottleville: B (83/100)
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
Cottleville 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 2 (Moderate 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 |
|---|---|---|---|
| 63338 | B | Mo American Mexico | 13,000 |
All ZIP Codes in Cottleville
- 63338 [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.
Health Outcomes in Cottleville
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
Lead Exposure Risk for Children in Cottleville
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.
Lead risk in Cottleville appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Cottleville, MO