Jefferson County, Kentucky
72 ZIP codes · Avg score 50/100 · Grade D · Updated
ZipCheckup grade for Jefferson County: D.
Several federal signals point to home-safety risks in this ZIP.
Monitoring across Jefferson County's 72 ZIP codes reveals a persistent pattern of below-average water quality - multiple areas carry documented health violations, and the data has shown little improvement over recent reporting cycles.
How Jefferson County Compares
How Jefferson County Compares
Jefferson County scores 19 points below the Kentucky state average (69/100) and 23 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Jefferson 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: $1,211, driven primarily by flood
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,211
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Jefferson County
Remediation costs are relatively manageable for most homeowners in Jefferson 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 serving Jefferson County
7 community water systems serving Jefferson County.
- D
- D
- D
- D
- D
- D
Show all 7 water systems
- D
All ZIP Codes in Jefferson County
72 ZIP codes tracked in Jefferson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 40023 | Fisherville | 50 | D | 0 | $430K |
| 2 | 40025 | Glenview | 50 | D | 0 | $1202K |
| 3 | 40041 | Masonic Home | 50 | D | 0 | $593K |
| 4 | 40059 | Prospect | 50 | D | 0 | $534K |
| 5 | 40118 | Fairdale | 50 | D | 0 | $141K |
| 6 | 40202 | Louisville | 50 | D | 0 | $340K |
| 7 | 40203 | Louisville | 50 | D | 0 | $179K |
| 8 | 40204 | Louisville | 50 | D | 0 | $315K |
| 9 | 40205 | Louisville | 50 | D | 0 | $362K |
| 10 | 40206 | Louisville | 50 | D | 0 | $276K |
| 11 | 40207 | Louisville | 50 | D | 0 | $402K |
| 12 | 40208 | Louisville | 50 | D | 0 | $153K |
| 13 | 40209 | Louisville | 50 | D | 0 | $128K |
| 14 | 40210 | Louisville | 50 | D | 0 | $93K |
| 15 | 40211 | Louisville | 50 | D | 0 | $98K |
| 16 | 40212 | Louisville | 50 | D | 0 | $78K |
| 17 | 40213 | Louisville | 50 | D | 0 | $169K |
| 18 | 40214 | Louisville | 50 | D | 0 | $177K |
| 19 | 40215 | Louisville | 50 | D | 0 | $107K |
| 20 | 40216 | Louisville | 50 | D | 0 | $155K |
| 21 | 40217 | Louisville | 50 | D | 0 | $221K |
| 22 | 40218 | Louisville | 50 | D | 0 | $196K |
| 23 | 40219 | Louisville | 50 | D | 0 | $186K |
| 24 | 40220 | Louisville | 50 | D | 0 | $250K |
| 25 | 40222 | Louisville | 50 | D | 0 | $347K |
| 26 | 40223 | Louisville | 50 | D | 0 | $344K |
| 27 | 40228 | Louisville | 50 | D | 0 | $220K |
| 28 | 40229 | Louisville | 50 | D | 0 | $197K |
| 29 | 40241 | Louisville | 50 | D | 0 | $349K |
| 30 | 40242 | Louisville | 50 | D | 0 | $293K |
| 31 | 40243 | Louisville | 50 | D | 0 | $298K |
| 32 | 40245 | Louisville | 50 | D | 0 | $433K |
| 33 | 40258 | Louisville | 50 | D | 0 | $173K |
| 34 | 40272 | Louisville | 50 | D | 0 | $170K |
| 35 | 40280 | Louisville | 50 | D | 0 | — |
| 36 | 40291 | Louisville | 50 | D | 0 | $265K |
| 37 | 40299 | Louisville | 50 | D | 0 | $275K |
| 38 | 40018 | Eastwood | — | — | — | |
| 39 | 40027 | Harrods Creek | — | — | — | |
| 40 | 40221 | Louisville | — | — | — | |
| 41 | 40224 | Louisville | — | — | — | |
| 42 | 40225 | Louisville | — | — | — | |
| 43 | 40231 | Louisville | — | — | 0 | — |
| 44 | 40232 | Louisville | — | — | — | |
| 45 | 40233 | Louisville | — | — | — | |
| 46 | 40250 | Louisville | — | — | — | |
| 47 | 40251 | Louisville | — | — | — | |
| 48 | 40252 | Louisville | — | — | — | |
| 49 | 40253 | Louisville | — | — | — | |
| 50 | 40255 | Louisville | — | — | — | |
| 51 | 40256 | Louisville | — | — | — | |
| 52 | 40257 | Louisville | — | — | — | |
| 53 | 40259 | Louisville | — | — | — | |
| 54 | 40261 | Louisville | — | — | — | |
| 55 | 40266 | Louisville | — | — | — | |
| 56 | 40268 | Louisville | — | — | — | |
| 57 | 40269 | Louisville | — | — | — | |
| 58 | 40270 | Louisville | — | — | — | |
| 59 | 40281 | Louisville | — | — | — | |
| 60 | 40282 | Louisville | — | — | — | |
| 61 | 40283 | Louisville | — | — | — | |
| 62 | 40285 | Louisville | — | — | — | |
| 63 | 40287 | Louisville | — | — | — | |
| 64 | 40289 | Louisville | — | — | — | |
| 65 | 40290 | Louisville | — | — | — | |
| 66 | 40292 | Louisville | — | — | — | |
| 67 | 40293 | Louisville | — | — | — | |
| 68 | 40294 | Louisville | — | — | — | |
| 69 | 40295 | Louisville | — | — | — | |
| 70 | 40296 | Louisville | — | — | — | |
| 71 | 40297 | Louisville | — | — | — | |
| 72 | 40298 | Louisville | — | — | — |
Recommended Buyer Guides for Jefferson County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- 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 Jefferson County, Kentucky
Overview
Jefferson County in Kentucky covers 72 tracked ZIP records with an average Home Safety Score of D (50/100) across 37 scored records.
The available EPA record reports 0 violations for 38 ZIP codes with a reported violation count.
← Back to Kentucky Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
What You Can Do
Jefferson County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.