Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
040013excellentexcellent21excellent
030014excellentexcellent21excellent
020015excellentexcellent31excellent
010015excellentexcellent21excellent
000015excellentexcellent21excellent
230018excellentexcellent21excellent
220019excellentexcellent21excellent
210021goodexcellent21excellent
200019excellentexcellent11excellent
190019excellentexcellent11excellent
180028goodexcellent11excellent
170024goodexcellent11excellent
160029goodexcellent21excellent
150029goodexcellent21excellent
140032goodexcellent21excellent
130034goodexcellent31excellent
120034goodexcellent41excellent
110097lightly pollutedexcellent31excellent
100030goodexcellent31excellent
090029goodexcellent41excellent
080026goodexcellent41excellent
070028goodexcellent41excellent
060029goodexcellent41excellent
050031goodexcellent41excellent