Madison County, Texas
4 ZIP codes · Avg score 84/100 · Grade B · Updated 2026-06-03
In current tracking cycles, Madison County — spanning 4 ZIP codes — records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Madison County Compares
How Madison County Compares
Madison 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
Key Risk Factors
Health risk index: 13.6 (asthma 10.1%, diabetes 13.4%)
Estimated additional annual cost per homeowner: $963, driven primarily by wildfire
Infrastructure: 0.26% avg pipe failure probability
47.3% of homes built before 1978 (lead paint era)
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: $963
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,089 housing units in Madison 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 Madison County
Remediation costs are relatively manageable for most homeowners in Madison 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 Madison 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 Madison County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | NORTH ZULCH MUD | 1,800 | 2 |
| 2 | High Prairie Water Supply Corporation | 1,494 | 2 |
| 3 | City of Madisonville | 6,111 | 1 |
| 4 | Osr Estates Subdivision | 29 | 1 |
| 5 | Concord-robbins Water Supply Corporation | 9,190 | 1 |
8 total water systems serve Madison County.
All ZIP Codes in Madison County
4 ZIP codes tracked in Madison County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 77864 | Madisonville | 87 | A | 1 | $132K |
| 2 | 77871 | Normangee | 87 | A | 1 | $245K |
| 3 | 77872 | North Zulch | 87 | A | 0 | $194K |
| 4 | 77861 | Iola | 73 | B | 0 | $260K |
Recommended Buyer Guides for Madison County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Overview
Madison County in Texas covers 4 ZIP codes with an average Home Safety Score of B (84/100).
2 of 4 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.