Butler County, Iowa
12 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-06-03
Water systems across Butler County's 12 ZIP codes produce average compliance results overall — pockets with documented violations exist, and the variation between areas makes ZIP-level lookup the most useful tool for residents here.
How Butler County Compares
How Butler County Compares
Butler County scores 3 points below the Iowa state average (59/100) and 12 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Butler County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.4 (asthma 9.9%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $1,413, driven primarily by flood
Infrastructure: 0.501% avg pipe failure probability, 83% of ZIPs at high risk
81% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Butler County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 2 violations. Past 5 years: 3 total (3 health-based).
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: $1,413
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,864 housing units in Butler 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 Butler County
Remediation costs are relatively manageable for most homeowners in Butler 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 Butler 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 Butler County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Allison Water Supply | 966 | 3 |
| 2 | Greene Muni Water Supply | 994 | 3 |
| 3 | Bristow Muni Water Supply | 145 | 3 |
| 4 | Shell Rock Muni Water Supp | 1,269 | 2 |
| 5 | New Hartford Water Supply | 570 | 2 |
9 total water systems serve Butler County.
All ZIP Codes in Butler County
12 ZIP codes tracked in Butler County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50625 | Dumont | 70 | B | 1 | $77K |
| 2 | 50604 | Aplington | 66 | C | 0 | $151K |
| 3 | 50619 | Clarksville | 65 | C | 1 | $147K |
| 4 | 50670 | Shell Rock | 65 | C | 0 | $172K |
| 5 | 50602 | Allison | 64 | C | 0 | $104K |
| 6 | 50636 | Greene | 59 | C | 0 | $150K |
| 7 | 50660 | New Hartford | 58 | C | 2 | $177K |
| 8 | 50611 | Bristow | 55 | C | 3 (3 health) | $78K |
| 9 | 50605 | Aredale | 53 | D | 0 | $55K |
| 10 | 50665 | Parkersburg | 41 | D | 0 | $215K |
| 11 | 50608 | Austinville | 40 | D | 0 | $205K |
| 12 | 50649 | Kesley | 40 | D | 0 | — |
Recommended Buyer Guides for Butler County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 81% 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 Butler County, Iowa
Overview
Butler County in Iowa covers 12 ZIP codes with an average Home Safety Score of C (56/100).
4 of 12 ZIP codes have recorded EPA violations. 3 health-based violations have been documented.
← 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.