| Pollutants with Unit | Harmful Effect on Sensitive Groups |
| O3 (ppm) | The group of people at the highest risk include individuals with lung disease, children, older adults, outdoor workers, those with specific genetic variants, and individuals with diets deficient in certain nutrients. |
| PM2.5 (μg/m3) | The group of people most at risk are individuals with heart or lung disease, older adults, children, and those with lower socioeconomic status. |
| PM10 (μg/m3) | The group of people most at risk are individuals with heart or lung disease, older adults, children, and those with lower socioeconomic status. |
| CO (ppm) | The group of people at the highest risk consists of individuals with heart disease. |
| NO2 (ppb) | The group of people at the greatest risk include individuals with asthma, children, and elderly adults. |
| SO2 (ppb) | The group of people at the greatest risk include individuals with asthma, children, and elderly adults. |