Warren County, Kentucky
4 ZIP codes · Avg score 64/100 · Grade C · Updated 2026-07-19
ZipCheckup grade for Warren: C.
A mixed picture - some signals here are worth your attention.
Current EPA records place Warren County in the middle tier for drinking water safety, with 4 ZIP codes showing a range of outcomes.
How Warren County Compares
How Warren County Compares
Warren County scores 3 points above the Kentucky state average (61/100) and 4 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
Key Risk Factors
Estimated additional annual cost per homeowner: $1,165, driven primarily by flood
Infrastructure: 0.373% avg pipe failure probability, 33% of ZIPs at high risk
41.7% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Warren County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 6 violations. Past 5 years: 13 total (13 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $1,165
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
52,503 housing units in Warren 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 Warren County
Remediation costs are relatively manageable for most homeowners in Warren 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 Warren County
6 community water systems serving Warren County.
- C
- C
- C
- C
- C
- C
All ZIP Codes in Warren County
4 ZIP codes tracked in Warren County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 42102 | Bowling Green | 66 | C | 0 | — |
| 2 | 42103 | Bowling Green | 65 | C | 0 | $304K |
| 3 | 42104 | Bowling Green | 65 | C | 0 | $283K |
| 4 | 42101 | Bowling Green | 60 | C | 0 | $188K |
Recommended Buyer Guides for Warren 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 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
Overview
Warren County in Kentucky covers 4 ZIP codes with an average Home Safety Score of C (64/100).
No EPA violations are recorded for the tracked water systems in Warren County as of the latest reporting period.
← 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.