Butler County, Ohio
18 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
For most households in Butler County, the 18 tracked ZIP codes show adequate but uneven water quality.
How Butler County Compares
How Butler County Compares
Butler County scores 0 points above the Ohio state average (60/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Butler County, Ohio
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.4 (asthma 10.8%, diabetes 12.5%)
Estimated additional annual cost per homeowner: $1,044, driven primarily by flood
Infrastructure: 0.34% avg pipe failure probability, 29% of ZIPs at high risk
69.9% 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: $1,044
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
137,509 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 | Southwest Regional Water District | 42,856 | 42 |
| 2 | Butler Company Water District 2 Public Water System | 116,572 | 41 |
| 3 | Crouse Mobile Home Park & Sales, Llc | 247 | 41 |
| 4 | Hamilton Public Water System | 62,447 | 20 |
| 5 | CINCINNATI PUBLIC WATER SYSTEM | 750,200 | 15 |
16 total water systems serve Butler County.
All ZIP Codes in Butler County
18 ZIP codes tracked in Butler County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 45062 | Seven Mile | 70 | B | 1 | $144K |
| 2 | 45067 | Trenton | 69 | C | 2 | $214K |
| 3 | 45015 | Hamilton | 66 | C | 6 | $117K |
| 4 | 45064 | Somerville | 65 | C | 0 | $209K |
| 5 | 45071 | West Chester | 65 | C | 2 | — |
| 6 | 45018 | Fairfield | 64 | C | 1 | — |
| 7 | 45069 | West Chester | 64 | C | 2 | $314K |
| 8 | 45012 | Hamilton | 62 | C | 6 | — |
| 9 | 45025 | Hamilton | 62 | C | 6 | — |
| 10 | 45026 | Hamilton | 62 | C | 6 | — |
| 11 | 45043 | Middletown | 62 | C | 2 | — |
| 12 | 45042 | Middletown | 61 | C | 2 | $192K |
| 13 | 45044 | Middletown | 61 | C | 2 | $230K |
| 14 | 45011 | Hamilton | 56 | C | 6 | $272K |
| 15 | 45013 | Hamilton | 56 | C | 6 | $217K |
| 16 | 45014 | Fairfield | 53 | D | 1 | $216K |
| 17 | 45004 | Collinsville | 40 | D | 0 | — |
| 18 | 45055 | Overpeck | 40 | D | 0 | — |
Recommended Buyer Guides for Butler County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 69.9% 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
Deep Dive Reports
Detailed analysis for Butler County, Ohio
Overview
Butler County in Ohio covers 18 ZIP codes with an average Home Safety Score of C (60/100).
15 of 18 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Ohio 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.