In the following table pollutants criteria to asses health damage are shown. Criteria established in Italy, United States and by WHO (World Health Organization) are reported. Units read: µg/m³ = micrograms per cubed meter, mg/m³ = milligrams per cubed meter and ppm = parts per million. Timings in parenteses refer to the averaging period over which the indicated threshold must not be violated.
| Species | Italy | USA | WHO | Effects on Health |
| Particulate PM10 | 40 µg/m³ (1 y) | 50 µg/m³ (1 y) | - | - |
| 50 µg/m³ (24 h) | 150 µg/m³ (24 h) | 150 µg/m³ (24 h) | ||
| Particulate PM2.5 | - | 15 µg/m³ (1 y) | - | - |
| Ozone (O3) | 110 µg/m³ (8 h) | 0.08 ppm (8 h) | 0.06 ppm (8 h) | - |
| 180 µg/m³ (1 h) | 0.12 ppm (1 h) | 0.08 ppm (1 h) | ||
| Nitrogen Dioxide (NO2) | 40 µg/m³ (1 y) | 0.053 ppm or 100 µg/m³ (1 y) | - | - |
| 200 µg/m³ (1 h) | 0.21 ppm (1 h) | 0.21 ppm (1 h) | ||
| Carbon Monoxide (CO) | 10 mg/m³ (8 h) | 9 ppm or 10 mg/m³ (8 h) | 9 ppm (8 h) | - |
| - | 35 ppm or 40 mg/m³ (1 h) | 26 ppm (1 h) | ||
| Sulfur Dioxide (SO2) | 125 µg/m³ (1 y) | 0.03 ppm (1 y) | - | - |
| - | 0.14 ppm (24 h) | 0.13 ppm (24 h) | ||
| 350 µg/m³ (1 h) | - | - |