Allen County, Kentucky
3 ZIP codes · Avg score 54/100 · Grade D · Updated 2026-06-03
Allen County's water safety record falls below average — health-based violations are on file in a notable share of the county's 3 ZIP codes, and several systems have recorded exceedances that trigger federal notification requirements.
How Allen County Compares
How Allen County Compares
Allen County scores 7 points below the Kentucky state average (61/100) and 14 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Estimated additional annual cost per homeowner: $477, driven primarily by flood
Infrastructure: 0.27% avg pipe failure probability
41.7% 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: $477
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
8,897 housing units in Allen 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 Allen County
Remediation costs are relatively manageable for most homeowners in Allen 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 5 systems in Allen County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | ALLEN COUNTY WATER DISTRICT | 16,398 | 0 |
| 2 | Simpson County Water District | 8,946 | 0 |
| 3 | GLASGOW WATER COMPANY | 36,766 | 0 |
| 4 | Scottsville Water Department | 6,864 | 0 |
| 5 | Warren County Water District | 91,118 | 0 |
6 total water systems serve Allen County.
All ZIP Codes in Allen County
3 ZIP codes tracked in Allen County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 42164 | Scottsville | 70 | B | 0 | $180K |
| 2 | 42120 | Adolphus | 53 | D | 0 | $165K |
| 3 | 42156 | Lucas | 40 | D | 0 | $207K |
Recommended Buyer Guides for Allen County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- 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
Allen County in Kentucky covers 3 ZIP codes with an average Home Safety Score of D (54/100).
No EPA violations recorded across any tracked ZIP codes in Allen 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.
What You Can Do
Allen 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.
Check for lead in your home
41.7% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.