Washington County, Texas
4 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Within Washington County, safety data across 4 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How Washington County Compares
How Washington County Compares
Washington County scores 14 points below the Texas state average (82/100) and 0 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 13.4 (asthma 10%, diabetes 13.2%)
Estimated additional annual cost per homeowner: $1,238, driven primarily by flood
Infrastructure: 0.348% avg pipe failure probability, 25% of ZIPs at high risk
41% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Washington County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 14 violations. Past 5 years: 41 total (41 health-based). Health-based violations are declining versus the prior 2-year window.
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: $1,238
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
15,672 housing units in Washington 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 Washington County
Remediation costs are relatively manageable for most homeowners in Washington 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 Washington 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 Washington County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | CITY OF BRENHAM | 18,469 | 49 |
| 2 | Central Washington County Water Supply Corporation | 2,270 | 49 |
| 3 | Starlite Mobile Home Park | 195 | 46 |
| 4 | Lake Forest Water System | 95 | 46 |
| 5 | WEST END WSC | 2,910 | 26 |
8 total water systems serve Washington County.
All ZIP Codes in Washington County
4 ZIP codes tracked in Washington County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 77426 | Chappell Hill | 73 | B | 0 | $369K |
| 2 | 77834 | Brenham | 70 | B | 23 (12 health) | — |
| 3 | 77835 | Burton | 69 | C | 3 (1 health) | $290K |
| 4 | 77833 | Brenham | 60 | C | 23 (12 health) | $262K |
Recommended Buyer Guides for Washington County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- 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
Washington County in Texas covers 4 ZIP codes with an average Home Safety Score of C (68/100).
3 of 4 ZIP codes have recorded EPA violations. 25 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.