Union County, Iowa
1 ZIP code · Avg score 65/100 · Grade C · Updated 2026-06-03
Compared to top-scoring counties, Union County's 1 ZIP code land in the middle tier — some meet standards cleanly, others carry documented violations, and the gap between the best and worst areas is wider than average.
How Union County Compares
How Union County Compares
Union County scores 6 points above the Iowa state average (59/100) and 3 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 13.9 (asthma 10.1%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $1,270, driven primarily by flood
Infrastructure: 0.48% avg pipe failure probability, 100% of ZIPs at high risk
80% 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: $1,270
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,504 housing units in Union 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 Union 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 Union 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 Union County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Creston Water Supply | 7,536 | 0 |
| 2 | Sirwa #2 (creston) | 20,793 | 0 |
| 3 | Sirwa #3 (osceola) | 4,080 | 0 |
| 4 | Sirwa - Corning | 2,585 | 0 |
| 5 | Sirwa #1 (greenfield) | 1,712 | 0 |
All ZIP Codes in Union County
1 ZIP code tracked in Union County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50801 | Creston | 65 | C | 0 | $121K |
Recommended Buyer Guides for Union County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 80% of homes built before 1978
- 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
Overview
Union County in Iowa covers 1 ZIP code with an average Home Safety Score of C (65/100).
No EPA violations recorded across any tracked ZIP codes in Union County.
← 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.