Iron County, Missouri
17 ZIP codes · Avg score 50/100 · Grade D · Updated 2026-06-03
Although conditions vary by area, Iron County's 17 ZIP codes collectively show below-average water safety — health-based violations are documented throughout the county, and the overall grade reflects a pattern rather than isolated incidents.
How Iron County Compares
How Iron County Compares
Iron County scores 19 points below the Missouri state average (69/100) and 18 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Iron County, Missouri
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15 (asthma 10.8%, diabetes 13.7%)
Estimated additional annual cost per homeowner: $1,082, driven primarily by flood
Infrastructure: 0.385% avg pipe failure probability, 43% of ZIPs at high risk
66.1% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Iron County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 11 violations. Past 5 years: 29 total (29 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,082
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
45,588 housing units in Iron County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Iron County
Remediation costs are relatively manageable for most homeowners in Iron County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Iron County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Iron County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Pilot Knob Rural Water District 1 N & S | 839 | 35 |
| 2 | Madison County Pwsd 1 North and South | 1,705 | 31 |
| 3 | Mo American Ironton | 1,460 | 22 |
| 4 | Pilot Knob Public Water System | 746 | 22 |
| 5 | Bismarck Public Water System | 1,470 | 20 |
20 total water systems serve Iron County.
All ZIP Codes in Iron County
17 ZIP codes tracked in Iron County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 63621 | Arcadia | 69 | C | 2 (1 health) | $159K |
| 2 | 63663 | Pilot Knob | 69 | C | 2 | $110K |
| 3 | 65566 | Viburnum | 65 | C | 7 (1 health) | $98K |
| 4 | 63623 | Belleview | 64 | C | 2 | $106K |
| 5 | 63620 | Annapolis | 61 | C | 9 | $122K |
| 6 | 63636 | Des Arc | 53 | D | 0 | $70K |
| 7 | 65456 | Davisville | 53 | D | 0 | $207K |
| 8 | 63650 | Ironton | 48 | D | 20 (8 health) | $113K |
| 9 | 63038 | Glencoe | 45 | D | 0 | $538K |
| 10 | 63011 | Ballwin | 40 | D | 0 | $374K |
| 11 | 63021 | Ballwin | 40 | D | 0 | $324K |
| 12 | 63022 | Ballwin | 40 | D | 0 | — |
| 13 | 63024 | Ballwin | 40 | D | 0 | — |
| 14 | 63045 | Earth City | 40 | D | 0 | — |
| 15 | 63675 | Vulcan | 40 | D | 0 | — |
| 16 | 65439 | Bixby | 40 | D | 0 | — |
| 17 | 65440 | Boss | 40 | D | 0 | — |
Recommended Buyer Guides for Iron County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 66.1% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Iron County, Missouri
Overview
Iron County in Missouri covers 17 ZIP codes with an average Home Safety Score of D (50/100).
6 of 17 ZIP codes have recorded EPA violations. 10 health-based violations have been documented.
← Back to Missouri water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.
What You Can Do
Iron County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
66.1% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.