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Starr County, TX Water Quality

Water quality data for 9 public water systems serving Starr County, Texas — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 9 water systems · 100 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Starr County Earns a B

Starr County: 100 communities across 9 water systems. 58.0% have no open violations.

  • Median lead where detected: 0.80 ppb
  • 2 communities with a lead detection, 98 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 58.0% of communities have no open violations
0.8 ppb
Median Lead Level
County-wide, 90th percentile
9
Water Systems
Active CWS & NTNCWS
58%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • El Rancho Vela
    Not detected
    No federal limits exceeded on record
    B
  • Sammy Martinez
    Not detected
    No federal limits exceeded on record
    B
  • La Carla
    Not detected
    No federal limits exceeded on record
    B
  • El Brazil
    Not detected
    No federal limits exceeded on record
    B
  • El Mesquite
    Not detected
    No federal limits exceeded on record
    B
⚠ Needs Attention
County Lead Level — Median 0.8 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 0.8 ppb — 5.3% of the federal action level
Systems by Lead Level
Under 5 ppb
2
No Data
98

All Cities in Starr County

Rio Grande City Not detected B
Roma Not detected B
Las Lomas Not detected B
Escobares Not detected B
Mikes Not detected D
East Alto Bonito Not detected D
Garza-Salinas II Not detected C
La Puerta Not detected C
West Alto Bonito Not detected D
Valle Vista Not detected D
Mesquite Not detected B
Garceno Not detected B
B and E Not detected C
Mi Ranchito Estate Not detected A
El Refugio Not detected C
La Paloma Ranchettes Not detected D
Camargito Not detected C
Alto Bonito Heights Not detected D
Los Ebanos Not detected B
Los Barreras Not detected B
Olmito and Olmito Not detected D
El Cenizo Not detected B
Santa Rosa Not detected C
El Rancho Vela Not detected B
Palo Blanco Not detected A
Los Alvarez Not detected A
Rancho Viejo Not detected B
Moraida Not detected B
El Chaparral Not detected C
El Quiote Not detected A
El Castillo Not detected D
La Esperanza Not detected A
Ranchitos del Norte Not detected A
Manuel Garcia Not detected C
San Juan Not detected B
La Escondida Not detected A
Eugenio Saenz Not detected D
La Victoria Not detected D
Fronton Ranchettes Not detected B
North Escobares Not detected B
Fronton Not detected B
Ramos Not detected B
Chaparrito Not detected C
La Casita Not detected C
E. Lopez Not detected D
Miguel Barrera Not detected B
Nina 0.80 ppb B
Sammy Martinez Not detected B
Regino Ramirez Not detected B
Barrera Not detected A
Hilltop Not detected B
Loma Vista Not detected B
Villarreal Not detected D
Campo Verde Not detected B
El Socio Not detected D
Flor del Rio Not detected A
Loma Linda West Not detected B
Valle Hermoso Not detected B
Buena Vista Not detected D
Victoria Vera Not detected C
J.F. Villareal Not detected B
Longoria Not detected D
Pablo Pena Not detected D
Evergreen Not detected B
Zarate Not detected D
Amada Acres Not detected C
Airport Heights Not detected B
La Rosita Not detected B
La Chuparosa Not detected B
Santa Cruz Not detected C
Pena Not detected B
Gutierrez Not detected D
Loma Linda East Not detected C
Ramirez-Perez Not detected C
Casa Blanca Not detected D
Rivereno Not detected D
Manuel Garcia II Not detected C
Guadalupe Guerra Not detected B
La Grulla Not detected D
La Carla Not detected B
El Brazil Not detected B
El Mesquite Not detected B
San Fernando Not detected B
Olivia Lopez de Gutierrez Not detected C
Garciasville Not detected C
Martinez Not detected B
Sandoval Not detected B
Sunset Not detected B
Narciso Pena Not detected D
Casas Not detected B
Benjamin Perez Not detected A
Tierra Dorada Not detected B
Fernando Salinas Not detected B
Santel Not detected A
Anacua Not detected B
Netos Not detected B
Elias-Fela Solis Not detected D
Rafael Pena Not detected D
Quesada 0.80 ppb B
Falcon Village Not detected B
Showing 100 cities
No active violations Active violations

About Starr County Drinking Water

Starr County is served by 9 water systems covering 100 communities. 58% have no open violations.

Of the communities reporting lead results, 2 recorded a detection, with a median of 0.80 ppb — 5% of the federal action level. 98 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Starr County tap water safe to drink?▼
58% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Starr County?▼
Among communities with a detection the median is 0.80 ppb, 5% of the 15 ppb action level. 98 reported none detected and 0 reported no result.
How many water systems serve Starr County?▼
9 community water systems serve 100 communities here.
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