Blanco County, Texas
2 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-06-03
Blanco County earns a high water safety grade — 2 ZIP codes tracked, virtually all compliant.
How Blanco County Compares
How Blanco County Compares
Blanco County scores 7 points below the Texas state average (82/100) and 7 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 13.4 (asthma 9.6%, diabetes 13.1%)
Estimated additional annual cost per homeowner: $1,390, driven primarily by flood
Infrastructure: 0.35% avg pipe failure probability
35.5% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Blanco County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 7 violations. Past 5 years: 11 total (11 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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: $1,390
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,455 housing units in Blanco 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 Blanco County
Remediation costs are relatively manageable for most homeowners in Blanco 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 Blanco 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 Blanco County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Johnson City | 2,097 | 40 |
| 2 | Stonegate Subdivision Water System | 63 | 22 |
| 3 | City of Blanco | 3,192 | 18 |
| 4 | Clwsc Canyon Lake Shores | 44,196 | 18 |
| 5 | Escondido Creek Water System | 129 | 18 |
All ZIP Codes in Blanco County
2 ZIP codes tracked in Blanco County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 78636 | Johnson City | 83 | B | 22 | $459K |
| 2 | 78606 | Blanco | 67 | C | 18 (8 health) | $361K |
Recommended Buyer Guides for Blanco County
Independent picks. EPA-grounded. Matched here.
- 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
Blanco County in Texas covers 2 ZIP codes with an average Home Safety Score of B (75/100).
2 of 2 ZIP codes have recorded EPA violations. 8 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.