Air quality index [µg/m3]:
excellent ≤ 12
good ≤ 36
lightly polluted ≤ 60
moderately polluted ≤ 84
heavily polluted ≤ 120
severely polluted > 120
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
130015goodexcellent41excellent
120023goodexcellent51excellent
110022goodexcellent61excellent
100024goodexcellent71excellent
090033goodexcellent71excellent
080031goodexcellent61excellent
070031goodexcellent61excellent
060034goodexcellent61excellent
050031goodexcellent51excellent
040029goodexcellent51excellent
030032goodexcellent61excellent
020029goodexcellent61excellent
010028goodexcellent51excellent
000025goodexcellent51excellent
230021goodexcellent41excellent
220017goodexcellent31excellent
210021goodexcellent51excellent
200022goodexcellent41excellent
190014goodexcellent21excellent
18007excellentexcellent11excellent
17006excellentexcellent11excellent
16007excellentexcellent11excellent
15006excellentexcellent11excellent
14007excellentexcellent11excellent