Jefferson County, Kentucky
72 ZIP codes · Avg score 50/100 · Grade D
ZipCheckup grade for Jefferson County: D.
Federal records show several conditions worth reviewing.
The D-F rating for Jefferson County calls for a closer look, not alarm, and each of its 72 ZIP codes has its own report.
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
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
Modeled additional annual cost estimate per homeowner: $1,096, largest modeled factor: Flood
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,096
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
Modeled remediation costs in Jefferson County can be compared with the median property value; actual costs vary by property.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Water systems mapped to Jefferson County ZIP codes
7 community water systems mapped to Jefferson County ZIP codes; EPA may list more systems serving the county.
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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
When no specific signal shows up in the records, the list falls back to general water testing and filtration guides rather than staying empty.
- 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 an average Home Safety grade of D across its scored ZIP records. Here are steps to protect your household.
Test your tap water
Ask a certified laboratory which tests it offers for lead, bacteria, and other contaminants relevant to your home; a $20-$50 kit may cover only certain contaminants.
Consider a certified water filter
NSF/ANSI-certified filters reduce the specific contaminants listed on their certification. 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 reports monitored contaminants detected in the utility's water and related compliance information.