Comal County, Texas
12 ZIP codes · Avg score 83/100 · Grade B · Updated 2026-06-03
Within Comal County, all 12 tracked ZIP codes show above-average drinking water safety — violations are infrequent and typically minor.
How Comal County Compares
How Comal County Compares
Comal County scores 1 points above the Texas state average (82/100) and 15 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Comal County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.9 (asthma 9.4%, diabetes 11.2%)
Estimated additional annual cost per homeowner: $1,669, driven primarily by flood
Infrastructure: 0.266% avg pipe failure probability
21.2% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Comal County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 31 violations. Past 5 years: 53 total (53 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: $1,669
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
81,625 housing units in Comal 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 Comal County
Remediation costs are relatively manageable for most homeowners in Comal 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 Comal 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 Comal County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Clwsc Canyon Lake Shores | 44,196 | 51 |
| 2 | Sjwtx Triple Peak Plant | 32,973 | 51 |
| 3 | Gbra Johnson Ranch Subdivision | 2,322 | 32 |
| 4 | Gbra Lomas Water Company Comal Trace | 792 | 32 |
| 5 | Eagles Peak Ranch Water Supply Corporation | 405 | 31 |
26 total water systems serve Comal County.
All ZIP Codes in Comal County
12 ZIP codes tracked in Comal County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 78135 | New Braunfels | 98 | A | 4 (1 health) | — |
| 2 | 78131 | New Braunfels | 94 | A | 4 (1 health) | — |
| 3 | 78291 | San Antonio | 94 | A | 2 (1 health) | — |
| 4 | 78266 | San Antonio | 89 | A | 2 (1 health) | $553K |
| 5 | 78163 | Bulverde | 84 | B | 12 (1 health) | $431K |
| 6 | 78070 | Spring Branch | 79 | B | 4 | $470K |
| 7 | 78130 | New Braunfels | 79 | B | 4 (1 health) | $296K |
| 8 | 78132 | New Braunfels | 79 | B | 4 (1 health) | $571K |
| 9 | 78133 | Canyon Lake | 79 | B | 17 (3 health) | $300K |
| 10 | 78623 | Fischer | 74 | B | 14 (5 health) | $564K |
| 11 | 78004 | Bergheim | 73 | B | 0 | $692K |
| 12 | 78027 | Kendalia | 73 | B | 0 | $280K |
Recommended Buyer Guides for Comal County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- 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
Deep Dive Reports
Detailed analysis for Comal County, Texas
Overview
Comal County in Texas covers 12 ZIP codes with an average Home Safety Score of B (83/100).
10 of 12 ZIP codes have recorded EPA violations. 15 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.