Randolph County, Missouri
8 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Spanning 8 ZIP codes, Randolph County lands near the national median for water safety — compliance results are mixed, and the county's middle-grade standing reflects genuine variability rather than a single systemic problem.
How Randolph County Compares
How Randolph County Compares
Randolph County scores 1 points below the Missouri state average (69/100) and 0 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Randolph County, Missouri
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.6 (asthma 10.9%, diabetes 12.7%)
Estimated additional annual cost per homeowner: $433, driven primarily by water_lead
Infrastructure: 0.363% avg pipe failure probability, 13% of ZIPs at high risk
63.9% of homes built before 1978 (lead paint era)
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: $433
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,490 housing units in Randolph 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 Randolph County
Remediation costs are relatively manageable for most homeowners in Randolph 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 Randolph 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 Randolph County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Thomas Hill Pwsd 1 | 10,880 | 10 |
| 2 | Boone County Pwsd 10 | 4,963 | 10 |
| 3 | HOWARD COUNTY PWSD 2 | 1,165 | 7 |
| 4 | Higbee Public Water System | 560 | 7 |
| 5 | Macon Company Pwsd 1 | 12,865 | 2 |
11 total water systems serve Randolph County.
All ZIP Codes in Randolph County
8 ZIP codes tracked in Randolph County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 65243 | Clark | 83 | B | 1 | $206K |
| 2 | 65259 | Huntsville | 83 | B | 0 | $130K |
| 3 | 65270 | Moberly | 82 | B | 2 | $143K |
| 4 | 65257 | Higbee | 74 | B | 7 | $117K |
| 5 | 65239 | Cairo | 63 | C | 0 | $176K |
| 6 | 65244 | Clifton Hill | 53 | D | 0 | $163K |
| 7 | 65260 | Jacksonville | 53 | D | 0 | $95K |
| 8 | 65278 | Renick | 53 | D | 0 | $82K |
Recommended Buyer Guides for Randolph 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 — 63.9% of homes built before 1978
Deep Dive Reports
Detailed analysis for Randolph County, Missouri
Overview
Randolph County in Missouri covers 8 ZIP codes with an average Home Safety Score of C (68/100).
3 of 8 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.