Warren County, Indiana
3 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-03
Tracking 3 ZIP codes in Warren County reveals a mixed picture — tap water quality varies meaningfully by location.
How Warren County Compares
How Warren County Compares
Warren County scores 2 points below the Indiana state average (60/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 15.3 (asthma 11.2%, diabetes 14.1%)
Estimated additional annual cost per homeowner: $877, driven primarily by energy_code_gap
Infrastructure: 0.433% avg pipe failure probability, 67% of ZIPs at high risk
75.7% 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 1 violation. Past 5 years: 2 total (2 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
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: $877
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,269 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.
Health Outcomes vs National Average
CDC PLACES data for Warren County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 3 systems in Warren County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Williamsport Water Utility | 1,800 | 16 |
| 2 | Pence Water Works | 37 | 16 |
| 3 | WEST LEBANON WATER WORKS | 723 | 1 |
All ZIP Codes in Warren County
3 ZIP codes tracked in Warren County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 47993 | Williamsport | 68 | C | 16 (2 health) | $125K |
| 2 | 47991 | West Lebanon | 66 | C | 1 | $128K |
| 3 | 47982 | State Line | 40 | D | 0 | $78K |
Recommended Buyer Guides for Warren 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 Lead Paint Test Kits — 75.7% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Overview
Warren County in Indiana covers 3 ZIP codes with an average Home Safety Score of C (58/100).
2 of 3 ZIP codes have recorded EPA violations. 2 health-based violations have been documented.
← Back to Indiana 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.