Callahan County, Texas
5 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-06-03
Covering 5 ZIP codes, Callahan County falls in the average tier for tap water safety — violations appear in a meaningful share of areas, and the data suggests quality depends heavily on which specific part of the county a household sits in.
How Callahan County Compares
How Callahan County Compares
Callahan County scores 13 points below the Texas state average (82/100) and 1 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Callahan County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.2 (asthma 10.2%, diabetes 13.6%)
Estimated additional annual cost per homeowner: $964, driven primarily by wildfire
Infrastructure: 0.428% avg pipe failure probability, 40% of ZIPs at high risk
61.4% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Callahan County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 32 violations. Past 5 years: 60 total (60 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: $964
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,253 housing units in Callahan 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 Callahan County
Remediation costs are relatively manageable for most homeowners in Callahan 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 Callahan 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 Callahan County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Callahan County Water Supply Corporation | 3,747 | 89 |
| 2 | Eula Water Supply Corporation | 3,918 | 80 |
| 3 | City of Clyde | 3,820 | 80 |
| 4 | Potosi Water Supply Corporation | 7,413 | 51 |
| 5 | Hamby Water Supply Corporation | 2,082 | 51 |
9 total water systems serve Callahan County.
All ZIP Codes in Callahan County
5 ZIP codes tracked in Callahan County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76443 | Cross Plains | 81 | B | 9 | $112K |
| 2 | 79510 | Clyde | 69 | C | 51 (36 health) | $154K |
| 3 | 76469 | Putnam | 66 | C | 0 | — |
| 4 | 76828 | Burkett | 66 | C | 0 | — |
| 5 | 79504 | Baird | 62 | C | 29 (11 health) | $113K |
Recommended Buyer Guides for Callahan County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 61.4% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Callahan County, Texas
Overview
Callahan County in Texas covers 5 ZIP codes with an average Home Safety Score of C (69/100).
3 of 5 ZIP codes have recorded EPA violations. 47 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.