AQI major pollutants, zoning and colors.
Level |
PM₂.₅ µg/m³ 24 h moving average value |
PM₁₀ µg/m³ 24 h moving average value |
NO₂ µg/m³ 1 h average |
SO₂ µg/m³ 1 h average |
O₃ µg/m³ 1 h average |
Very good |
0-10 |
0-20 |
0-40 |
0-100 |
0-50 |
Good |
11-20 |
21-40 |
41-90 |
101-200 |
51-100 |
Mediocre |
21-25 |
41-50 |
91-120 |
201-350 |
101-130 |
Bad |
26-50 |
51-100 |
121-230 |
351-500 |
131-240 |
Very bad |
51-75 |
101-150 |
231-340 |
501-750 |
241-380 |
Especially bad |
>75 |
>150 |
>340 |
>750 |
>380 |
Pollution assessment was performed using operational data before data quality control.