Kendall County, Texas
3 ZIP codes · Avg score 78/100 · Grade B · Updated 2026-06-03
Within Kendall County, all 3 tracked ZIP codes show above-average drinking water safety — violations are infrequent and typically minor.
How Kendall County Compares
How Kendall County Compares
Kendall County scores 4 points below the Texas state average (82/100) and 10 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 12 (asthma 9.3%, diabetes 11.1%)
Estimated additional annual cost per homeowner: $2,910, driven primarily by flood
Infrastructure: 0.41% avg pipe failure probability, 67% of ZIPs at high risk
71.7% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Kendall County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 10 violations. Past 5 years: 30 total (30 health-based). Health-based violations are declining versus the prior 2-year window.
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: $2,910
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,595 housing units in Kendall 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 Kendall County
Remediation costs are relatively manageable for most homeowners in Kendall 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 Kendall County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Kendall County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Boerne | 24,769 | 55 |
| 2 | SAN ANTONIO WATER SYSTEM | 2,113,151 | 55 |
| 3 | Kendall West Utility | 4,062 | 55 |
| 4 | Gbra Cordillera Ranch | 1,707 | 55 |
| 5 | The Oaks Water Supply Corporation | 1,191 | 55 |
11 total water systems serve Kendall County.
All ZIP Codes in Kendall County
3 ZIP codes tracked in Kendall County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 77978 | Point Comfort | 92 | A | 14 (3 health) | $116K |
| 2 | 78074 | Waring | 73 | B | 0 | — |
| 3 | 78006 | Boerne | 68 | C | 55 (11 health) | $503K |
Recommended Buyer Guides for Kendall 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 Lead Paint Test Kits — 71.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Overview
Kendall County in Texas covers 3 ZIP codes with an average Home Safety Score of B (78/100).
2 of 3 ZIP codes have recorded EPA violations. 14 health-based violations have been documented.
← Back to Texas 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.