Oldham County, Kentucky
6 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Oldham County's water quality grade reflects a middle-ground assessment — its 6 ZIP codes range from fully compliant to violation-flagged.
How Oldham County Compares
How Oldham County Compares
Oldham County scores 1 points below the Kentucky state average (61/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Oldham County, Kentucky
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Estimated additional annual cost per homeowner: $890, driven primarily by flood
Infrastructure: 0.274% avg pipe failure probability
42.4% of homes built before 1978 (lead paint era)
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: $890
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
18,746 housing units in Oldham 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 Oldham County
Remediation costs are relatively manageable for most homeowners in Oldham 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.
Water Systems with Most Violations
Top 4 systems in Oldham County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Oldham County Water District | 38,409 | 0 |
| 2 | LOUISVILLE WATER COMPANY | 764,769 | 0 |
| 3 | Henry County Water District #2 | 17,716 | 0 |
| 4 | North Shelby Water District | 14,660 | 0 |
All ZIP Codes in Oldham County
6 ZIP codes tracked in Oldham County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 40010 | Buckner | 83 | B | 0 | $486K |
| 2 | 40014 | Crestwood | 63 | C | 0 | $382K |
| 3 | 40031 | La Grange | 63 | C | 0 | $316K |
| 4 | 40032 | La Grange | 53 | D | 0 | — |
| 5 | 40026 | Goshen | 50 | D | 0 | $426K |
| 6 | 40077 | Westport | 50 | D | 0 | $198K |
Recommended Buyer Guides for Oldham County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- 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 Oldham County, Kentucky
Overview
Oldham County in Kentucky covers 6 ZIP codes with an average Home Safety Score of C (60/100).
No EPA violations recorded across any tracked ZIP codes in Oldham County.
← Back to Kentucky 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.