West Alton, MO Water Safety: 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
If you're researching West Alton, MO tap water quality, the baseline finding is below average — health-based violations are documented in several service areas, and verifying the specific system at your address is the right next step.
How West Alton Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About West Alton Water
- Homes built before 1986: 89% — older plumbing may contain lead solder.
- Estimated remediation: $1,600 per household.
- CDC health risk index: 11.99.
Who Supplies Your Water in West Alton
A single dominant system supplies most of West Alton, MO. 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 West Alton, Missouri, covering 1 community water system serving approximately 537 people.
No EPA violations recorded across any ZIP codes in West Alton — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for West Alton: 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
West Alton water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for West Alton
- 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 |
|---|---|---|---|
| 63386 | D | PORTAGE DES SIOUX PWS | 345 |
All ZIP Codes in West Alton
- 63386 [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.
Health Outcomes in West Alton
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
Housing & Infrastructure in West Alton
With 89% 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
Heavily weighted toward older construction, West Alton's housing stock carries a median build year of 1968. That profile puts a majority of homes in the era when lead-soldered copper plumbing was standard practice.
Over half of homes in West Alton 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.
Cost Context: What Remediation Means for West Alton Homeowners
Viewed from a financial planning lens, West Alton sits in the moderate remediation-share tier — the equity impact of addressing documented issues is real, and deliberate preparation separates smooth outcomes from disruptive ones for most homeowners.
Remediation costs are moderate relative to home values in West Alton. The estimated $800–$2,600 range is manageable for most homeowners but still worth budgeting for. Home values are 11% below the Missouri average.
Lead Exposure Risk for Children in West Alton
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.
When older housing represents 89% of the local inventory or aggregate readings approach the federal action level, an in-home check becomes the standard way to translate citywide averages into the specific reality of an individual West Alton address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in West Alton
Unlike communities where NFIP data shows minimal flood history, West Alton's record documents 2078 claims and 100% of ZIP codes inside FEMA flood zones — a combination that moves flood-related water quality risk from the background into the foreground of any complete local water assessment. Flooding can overwhelm treatment capacity, contaminate wells, and trigger distribution backflow; at this level of exposure, those mechanisms have likely been activated during significant flood events.
West Alton has a significant flood history with 2,078 FEMA flood insurance claims on record, averaging $16,963 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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>$1,600</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 West Alton
- 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 89% 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 West Alton, MO