Knox County, Texas
3 ZIP codes · Avg score 83/100 · Grade B · Updated 2026-06-03
Across all 3 ZIP codes in Knox County, tap water consistently meets or exceeds federal safety standards.
How Knox County Compares
How Knox County Compares
Knox 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
Key Risk Factors
Health risk index: 14.7 (asthma 10.1%, diabetes 15.6%)
Estimated additional annual cost per homeowner: $1,157, driven primarily by energy_code_gap
Infrastructure: 0.477% avg pipe failure probability, 100% of ZIPs at high risk
81% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↑ Worsening trendEPA violation counts by year across Knox County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 6 violations. Past 5 years: 17 total (17 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: $1,157
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,554 housing units in Knox 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 Knox County
Remediation costs are relatively manageable for most homeowners in Knox 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 Knox 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 Knox County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Rhineland Water Supply Corporation | 136 | 25 |
| 2 | City of Munday | 1,478 | 25 |
| 3 | North Central Texas Municipal Water Authority | 132 | 25 |
| 4 | City of Benjamin | 235 | 18 |
| 5 | City of Knox City | 1,037 | 7 |
6 total water systems serve Knox County.
All ZIP Codes in Knox County
3 ZIP codes tracked in Knox County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76371 | Munday | 98 | A | 25 (1 health) | $73K |
| 2 | 79529 | Knox City | 97 | A | 7 (2 health) | $66K |
| 3 | 79505 | Benjamin | 55 | C | 18 (15 health) | $61K |
Recommended Buyer Guides for Knox County
Filtered against federal data, fitted to local risks.
- Best Lead Paint Test Kits — 81% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Overview
Knox County in Texas covers 3 ZIP codes with an average Home Safety Score of B (83/100).
3 of 3 ZIP codes have recorded EPA violations. 18 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.