Zapata County, Texas
3 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Zapata County shows moderate water quality across its 3 ZIP codes — some areas carry violations worth monitoring.
How Zapata County Compares
How Zapata County Compares
Zapata 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: 15.4 (asthma 9.2%, diabetes 21.5%)
Estimated additional annual cost per homeowner: $1,350, driven primarily by sea_level
Infrastructure: 0.427% avg pipe failure probability, 33% of ZIPs at high risk
65% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↑ Worsening trendEPA violation counts by year across Zapata County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 7 violations. Past 5 years: 17 total (17 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: $1,350
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,082 housing units in Zapata 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 Zapata County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Zapata 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 Zapata County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Falcon Rural Water Supply Corporation | 3,600 | 52 |
| 2 | ZAPATA COUNTY WATERWORKS SWTP | 13,736 | 52 |
| 3 | Siesta Shores Wcid | 1,842 | 52 |
| 4 | Zapata County Wcid Hwy 16 East | 243 | 52 |
| 5 | Zapata County San Ygnacio and Ramireno | 1,254 | 52 |
All ZIP Codes in Zapata County
3 ZIP codes tracked in Zapata County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 78076 | Zapata | 71 | B | 52 (15 health) | $90K |
| 2 | 78067 | San Ygnacio | 66 | C | 0 | $87K |
| 3 | 78360 | Guerra | 66 | C | 0 | — |
Recommended Buyer Guides for Zapata County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 65% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Overview
Zapata County in Texas covers 3 ZIP codes with an average Home Safety Score of C (68/100).
1 of 3 ZIP codes have recorded EPA violations. 15 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.