Mason County, Texas
6 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
Across Mason County, EPA compliance data for 6 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Mason County Compares
How Mason County Compares
Mason County scores 23 points below the Texas state average (82/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Mason County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.3 (asthma 9.5%, diabetes 14.5%)
Estimated additional annual cost per homeowner: $1,075, driven primarily by wildfire
Infrastructure: 0.364% avg pipe failure probability, 40% of ZIPs at high risk
51% of homes built before 1978 (lead paint era)
Violation History (2021–2022)
→ Stable trendEPA violation counts by year across Mason County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 30 violations. Past 5 years: 48 total (48 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: $1,075
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,642 housing units in Mason 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 Mason County
Remediation costs are relatively manageable for most homeowners in Mason 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 Mason County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
All ZIP Codes in Mason County
6 ZIP codes tracked in Mason County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 76856 | Mason | 76 | B | 10 (7 health) | $272K |
| 2 | 76831 | Castell | 63 | C | 0 | — |
| 3 | 76820 | Art | 53 | D | 0 | $214K |
| 4 | 76842 | Fredonia | 53 | D | 0 | — |
| 5 | 76869 | Pontotoc | 53 | D | 0 | — |
| 6 | 78618 | Doss | 53 | D | 0 | $319K |
Recommended Buyer Guides for Mason County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 51% 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 Mason County, Texas
Overview
Mason County in Texas covers 6 ZIP codes with an average Home Safety Score of C (59/100).
1 of 6 ZIP codes have recorded EPA violations. 7 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.