Holt County, Missouri
7 ZIP codes · Avg score 62/100 · Grade C · Updated 2026-06-03
In recent monitoring cycles, Holt County's 7 ZIP codes show a split record — several have documented water safety violations.
How Holt County Compares
How Holt County Compares
Holt County scores 7 points below the Missouri state average (69/100) and 6 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Holt County, Missouri
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.4 (asthma 10.4%, diabetes 14.1%)
Estimated additional annual cost per homeowner: $1,207, driven primarily by flood
Infrastructure: 0.421% avg pipe failure probability, 71% of ZIPs at high risk
71.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Holt County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 2 violations. Past 5 years: 6 total (6 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: $1,207
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,188 housing units in Holt 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 Holt County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Holt 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 Holt County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Holt County Pwsd 1 | 1,085 | 14 |
| 2 | Mound City Public Water System | 1,159 | 6 |
| 3 | Big Lake Village of Public Water System | 2,000 | 6 |
| 4 | Craig Public Water System | 400 | 6 |
| 5 | Oregon Public Water System | 837 | 4 |
19 total water systems serve Holt County.
All ZIP Codes in Holt County
7 ZIP codes tracked in Holt County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 64429 | Cameron | 70 | B | 0 | $186K |
| 2 | 64431 | Clearmont | 68 | C | 1 | $146K |
| 3 | 64470 | Mound City | 65 | C | 0 | $157K |
| 4 | 64473 | Oregon | 65 | C | 4 | $121K |
| 5 | 64451 | Forest City | 64 | C | 3 (1 health) | $88K |
| 6 | 64466 | Maitland | 55 | C | 1 | $110K |
| 7 | 64437 | Craig | 48 | D | 6 (2 health) | $116K |
Recommended Buyer Guides for Holt County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 71.3% 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 Holt County, Missouri
Overview
Holt County in Missouri covers 7 ZIP codes with an average Home Safety Score of C (62/100).
5 of 7 ZIP codes have recorded EPA violations. 3 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.