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
050035goodexcellent41excellent
040032goodexcellent51excellent
030032goodexcellent61excellent
020036goodexcellent51excellent
010036goodexcellent51excellent
000039goodexcellent51excellent
230038goodexcellent51excellent
220026goodexcellent41excellent
210022goodexcellent31excellent
200021goodexcellent31excellent
190018excellentexcellent31excellent
180051goodexcellent21excellent
1700157heavily pollutedexcellent21excellent
160086lightly pollutedexcellent31excellent
150074lightly pollutedexcellent41excellent
140022goodexcellent21excellent
130021goodexcellent31excellent
120030goodexcellent31excellent
110016excellentexcellent21excellent
100044goodexcellent31excellent
090016excellentexcellent31excellent
080018excellentexcellent41excellent
070022goodexcellent41excellent
060021goodexcellent31excellent