EPA ACTIVE WATCH Western US & Intermountain Basins: Wildfire Smoke & Elevated PM2.5 Infiltration

Pharr vs San Benito

Reading the difference

San Benito scores 15.4 points higher on the historical 0–100 scale. This is a score difference, not a percentage reduction in pollution or a reading of today’s air.

Pharr, TX

Grade F
30.2
Clean Air Score
Annual PM2.5 12.1 µg/m³
Unhealthy Days 3.3%

San Benito, TX

Grade D
45.6
Clean Air Score
Annual PM2.5 10.2 µg/m³
Unhealthy Days 2.3%
Sponsor

The history behind the comparison.

Pharr

Historical perspective

The longer view.

Annual PM2.5 concentrations · µg/m³

Regional reference: Edinburg (7.5 miles away). These historical values are inherited from that location, not measured in Pharr.

Historical annual PM2.5 concentrations 0.06.012.1 2019: 10.3 µg/m³20192020: 10.8 µg/m³20202021: 10.1 µg/m³20212022: 8.9 µg/m³20222023: 9.8 µg/m³20232024: 12.1 µg/m³2024
View data table
Annual PM2.5 · µg/m³
YearPM2.5
201910.3
202010.8
202110.1
20228.9
20239.8
202412.1
Historical score30.2/100
Annual mean PM2.512.1 µg/m³

Available history: 2019–2024. Historical scores are distinct from current AQI and do not describe today’s conditions.

Sources and scoring method ↗

San Benito

Historical perspective

The longer view.

Annual PM2.5 concentrations · µg/m³

Regional reference: Brownsville (18 miles away). These historical values are inherited from that location, not measured in San Benito.

Historical annual PM2.5 concentrations 0.05.210.3 2019: 9.8 µg/m³20192020: 10.1 µg/m³20202021: 9.2 µg/m³20212022: 8.2 µg/m³20222023: 7.8 µg/m³20232024: 10.3 µg/m³2024
View data table
Annual PM2.5 · µg/m³
YearPM2.5
20199.8
202010.1
20219.2
20228.2
20237.8
202410.3
Historical score45.6/100
Annual mean PM2.510.2 µg/m³

Available history: 2019–2024. Historical scores are distinct from current AQI and do not describe today’s conditions.

Sources and scoring method ↗

Pharr vs San Benito - Common Questions

Is San Benito or Pharr better for air quality?

San Benito scores 15.4 points higher on the historical 0–100 scale. This is a score difference, not a percentage reduction in pollution or a reading of today’s air.

What is the difference in PM2.5 levels between Pharr and San Benito?

The stored annual PM2.5 values are 12.1 μg/m³ for Pharr and 10.2 μg/m³ for San Benito. Check the historical year labels and any regional-reference notes before comparing.

Does this score measure today’s air?

No. This comparison uses stored historical records. Open each city report to see available current observations, their timestamps and source. Historical scores are not medical assessments.

Can I use this comparison to choose where to live?

It can help compare one environmental factor. It does not predict property values, healthcare costs or personal outcomes. Consider local conditions, data coverage and your other priorities as well.

Compare Other Cities

About This Data

Data Sources

Historical scores use stored EPA-derived city records. Current observations are requested separately and may use monitoring or modelled regional data. Inspect each report’s source and reporting period.

Methodology

Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:

  • Annual PM2.5 averages (40%)
  • Frequency of unhealthy days (25%)
  • 5-year pollution trends (20%)
  • Seasonal variability and extreme events (15%)

Updates & Accuracy

Historical year labels describe the available observations, not the site edition year. Some locations inherit a nearby city’s historical score and are labelled as regional references. Current readings may be unavailable or delayed.

Read the full method

Explore the scoring formula, coverage limitations and data sources. A historical score is not today’s AQI or a personal medical assessment.

Data provided for informational purposes only. Always consult local health officials during extreme smoke or pollution events.