How is the Air Quality in Houston?
Houston air quality exceeded the WHO annual limits on over one-third of days in 2020. Houston’s air quality averaged over four times the daily recommended limit of dangerous PM2.5 pollutants on its worse day in 2020.
37% Of Days in Houston More Polluted Than WHO Target
Houston’s daily air quality levels exceeded the World Health Organization (WHO) annual limit on 37% of days in 2020. Some days in Houston saw air pollution levels, reaching “very unhealthy” levels, far above safe air quality levels.
Current Air Quality in Houston
Houston Air Pollution: The Negative Health Effects
This analysis of Houston’s air quality is based on PM2.5 pollution. These are particles smaller than 2.5 microns in diameter that can penetrate deep into the lungs and even enter the bloodstream. 
Studies have shown that PM2.5 raises blood pressure, inflammation, and rates of heart attacks and strokes.
WATCH: Why Is PM2.5 So Harmful to Us?
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Protect Your Health in Houston
Despite the harms of PM2.5, placebo-controlled studies of air purifiers have found that removing particulate in the home has positive effects on blood pressure, inflammation, and immune response.
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