Starr County, Texas
6 ZIP codes · Avg score 77/100 · Grade B · Updated 2026-07-19
ZipCheckup grade for Starr: B.
This ZIP looks solid, with a few items worth a quick check.
For households in Starr County, the 6 ZIP codes on record show consistently safe tap water.
How Starr County Compares
How Starr County Compares
Starr County scores 5 points below the Texas state average (82/100) and 9 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Starr County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.5 (asthma 9.4%, diabetes 18.9%)
Estimated additional annual cost per homeowner: $2,168, driven primarily by sea_level
Infrastructure: 0.423% avg pipe failure probability, 50% of ZIPs at high risk
56% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Starr County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 20 violations. Past 5 years: 38 total (38 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: $2,168
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
22,227 housing units in Starr 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 Starr 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 Starr County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Starr County
7 community water systems serving Starr County.
- A
- B
- A
- A
- C
- A
Show all 7 water systems
- B
Systems with the most violations in Starr County
2 water systems with recorded EPA violations.
- B
- A
All ZIP Codes in Starr County
6 ZIP codes tracked in Starr County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 78582 | Rio Grande City | 89 | A | 12 (1 health) | $102K |
| 2 | 78545 | Falcon Heights | 83 | B | 16 (1 health) | — |
| 3 | 78584 | Roma | 79 | B | 52 (11 health) | $84K |
| 4 | 78548 | Grulla | 73 | B | 0 | $52K |
| 5 | 78564 | Lopeno | 73 | B | 0 | — |
| 6 | 78585 | Salineno | 66 | C | 0 | — |
Recommended Buyer Guides for Starr County
Eight risk categories drive the selection - PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback - and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 56% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Starr County, Texas
Overview
Starr County in Texas covers 6 ZIP codes with an average Home Safety Score of B (77/100).
3 of 6 ZIP codes have recorded EPA violations. 13 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.