Hill County, Texas
16 ZIP codes · Avg score 84/100 · Grade B · Updated 2026-06-03
Hill County maintains reliable drinking water quality across all 16 of its tracked ZIP codes.
How Hill County Compares
How Hill County Compares
Hill County scores 2 points above the Texas state average (82/100) and 16 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Hill 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 10.3%, diabetes 14.2%)
Estimated additional annual cost per homeowner: $799, driven primarily by wildfire
Infrastructure: 0.368% avg pipe failure probability, 13% of ZIPs at high risk
56.8% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Hill County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 48 violations. Past 5 years: 62 total (62 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: $799
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,109 housing units in Hill 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 Hill County
Remediation costs are relatively manageable for most homeowners in Hill 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 Hill 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 Hill County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Brandon-irene Water Supply Corporation | 2,000 | 108 |
| 2 | Files Valley Water Supply Corporation | 3,600 | 74 |
| 3 | Woodrow Osceola Water Supply Corporation Blanton Well Plant 1 | 2,526 | 61 |
| 4 | HILL COUNTY WSC | 4,383 | 54 |
| 5 | Post Oak Special Utility District | 3,117 | 43 |
39 total water systems serve Hill County.
All ZIP Codes in Hill County
16 ZIP codes tracked in Hill County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76055 | Itasca | 99 | A | 0 | $205K |
| 2 | 76631 | Bynum | 97 | A | 2 | $117K |
| 3 | 76666 | Mertens | 94 | A | 40 (1 health) | $92K |
| 4 | 76645 | Hillsboro | 93 | A | 22 (2 health) | $155K |
| 5 | 76673 | Mount Calm | 87 | A | 21 (1 health) | $114K |
| 6 | 76660 | Malone | 86 | A | 2 | $120K |
| 7 | 76676 | Penelope | 86 | A | 2 | $133K |
| 8 | 76621 | Abbott | 85 | A | 3 | $227K |
| 9 | 76627 | Blum | 84 | B | 7 (3 health) | $143K |
| 10 | 76622 | Aquilla | 83 | B | 14 (1 health) | $197K |
| 11 | 76636 | Covington | 82 | B | 7 | $200K |
| 12 | 76648 | Hubbard | 82 | B | 18 (2 health) | $121K |
| 13 | 76692 | Whitney | 81 | B | 8 (1 health) | $160K |
| 14 | 76628 | Brandon | 73 | B | 0 | — |
| 15 | 76644 | Laguna Park | 66 | C | 0 | — |
| 16 | 76650 | Irene | 66 | C | 0 | $116K |
Recommended Buyer Guides for Hill County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 56.8% 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 Hill County, Texas
Overview
Hill County in Texas covers 16 ZIP codes with an average Home Safety Score of B (84/100).
12 of 16 ZIP codes have recorded EPA violations. 11 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.