Johnson County, Texas
12 ZIP codes · Avg score 86/100 · Grade A · Updated 2026-06-03
Throughout Johnson County, the 12 monitored ZIP codes show low violation rates and healthy safety scores — a pattern that puts the county well above the state baseline for drinking water quality.
How Johnson County Compares
How Johnson County Compares
Johnson County scores 4 points above the Texas state average (82/100) and 18 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Johnson County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.4 (asthma 10.2%, diabetes 11.9%)
Estimated additional annual cost per homeowner: $1,248, driven primarily by flood
Infrastructure: 0.263% avg pipe failure probability
35.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Johnson County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 20 violations. Past 5 years: 32 total (32 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: $1,248
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
72,153 housing units in Johnson 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 Johnson County
Remediation costs are relatively manageable for most homeowners in Johnson 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 Johnson 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 Johnson County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Johnson County Special Utility District | 65,517 | 83 |
| 2 | City of Cleburne | 34,075 | 60 |
| 3 | Bethesda Water Supply Corporation | 33,441 | 52 |
| 4 | Parker Water Supply Corporation | 3,300 | 46 |
| 5 | City of Rio Vista | 1,040 | 46 |
33 total water systems serve Johnson County.
All ZIP Codes in Johnson County
12 ZIP codes tracked in Johnson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76050 | Grandview | 95 | A | 0 | $255K |
| 2 | 76097 | Burleson | 95 | A | 2 | — |
| 3 | 76059 | Keene | 93 | A | 9 (2 health) | $223K |
| 4 | 76084 | Venus | 93 | A | 2 | $249K |
| 5 | 76044 | Godley | 87 | A | 0 | $370K |
| 6 | 76093 | Rio Vista | 86 | A | 16 (1 health) | $123K |
| 7 | 76058 | Joshua | 85 | A | 14 | $225K |
| 8 | 76031 | Cleburne | 84 | B | 15 (1 health) | $204K |
| 9 | 76033 | Cleburne | 84 | B | 15 (1 health) | $231K |
| 10 | 76009 | Alvarado | 81 | B | 10 | $211K |
| 11 | 76028 | Burleson | 81 | B | 2 | $295K |
| 12 | 76061 | Lillian | 66 | C | 0 | — |
Recommended Buyer Guides for Johnson 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
Deep Dive Reports
Detailed analysis for Johnson County, Texas
Overview
Johnson County in Texas covers 12 ZIP codes with an average Home Safety Score of A (86/100).
9 of 12 ZIP codes have recorded EPA violations. 5 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.