Osceola County, Iowa
5 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-03
While Osceola County avoids the worst tiers, a portion of its 5 ZIP codes have logged violations.
How Osceola County Compares
How Osceola County Compares
Osceola County scores 8 points above the Iowa state average (59/100) and 1 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Osceola County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.1 (asthma 10%, diabetes 14%)
Estimated additional annual cost per homeowner: $886, driven primarily by energy_code_gap
Infrastructure: 0.488% avg pipe failure probability, 80% of ZIPs at high risk
81% 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: $886
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,897 housing units in Osceola 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 Osceola County
Remediation costs are relatively manageable for most homeowners in Osceola 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 Osceola 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 Osceola County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Ashton Municipal Water Department | 436 | 2 |
| 2 | Ocheyedan Water Works | 439 | 2 |
| 3 | Sibley Public Water Supply | 2,860 | 0 |
| 4 | Melvin Waterworks | 202 | 0 |
| 5 | Harris Water Supply | 151 | 0 |
6 total water systems serve Osceola County.
All ZIP Codes in Osceola County
5 ZIP codes tracked in Osceola County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 51232 | Ashton | 69 | C | 2 | $98K |
| 2 | 51354 | Ocheyedan | 68 | C | 2 | $129K |
| 3 | 51249 | Sibley | 66 | C | 0 | $150K |
| 4 | 51345 | Harris | 66 | C | 0 | $129K |
| 5 | 51350 | Melvin | 66 | C | 0 | $81K |
Recommended Buyer Guides for Osceola County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 81% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Osceola County, Iowa
Overview
Osceola County in Iowa covers 5 ZIP codes with an average Home Safety Score of C (67/100).
2 of 5 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Iowa 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.