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
20007excellentexcellent11excellent
19003excellentexcellent11excellent
18003excellentexcellent11excellent
17005excellentexcellent11excellent
16006excellentexcellent11excellent
15005excellentexcellent11excellent
14005excellentexcellent11excellent
130010excellentexcellent21excellent
120015excellentexcellent31excellent
110016excellentexcellent41excellent
100020excellentexcellent41excellent
090036goodexcellent71excellent
080042goodexcellent81excellent
070046goodexcellent91excellent
060036goodexcellent71excellent
050028goodexcellent51excellent
040025goodexcellent51excellent
030025goodexcellent51excellent
020025goodexcellent51excellent
010032goodexcellent41excellent
000021goodexcellent31excellent
230021goodexcellent31excellent
220016excellentexcellent21excellent
210013excellentexcellent21excellent