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What are the EPA thresholds for air quality?

Currently, EPA has primary and secondary standards for PM2.5 (annual average standards with levels of 12.0 g/m3 and 15.0 g/m3, respectively; 24-hour standards with 98th percentile forms and levels of 35 g/m3) and PM10 (24-hour standards with one-expected exceedance forms and levels of 150 g/m3).

What is the EPA standard for air?

NAAQS Table Pollutant [links to historical tables of NAAQS reviews]LevelOzone (O3)0.070 ppm (3)Particle Pollution (PM)PM2.512.0 g/m315.0 g/m335 g/m38 more rows Mar 15, 2023

What does 157 air quality mean?

Unhealthy (151 - 200)When air quality is in this range, any individual who is active outdoors may experience the respiratory effects described above. Members of sensitive groups are likely to experience more severe effects.

What does the EPA do for air quality?

The Clean Air Act (CAA) requires EPA to regulate emissions of toxic air pollutants from a published list of industrial sources referred to as source categories. Toxic air pollutants include mercury, polychlorinated biphenyls (PCBs), benzene and volatile organic compounds (VOCs).

What does the EPA air quality mean?

The higher the AQI value, the greater the level of air pollution and the greater the health concern. For example, an AQI value of 50 represents good air quality with little potential to affect public health, while an AQI value over 300 represents hazardous air quality.

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