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
080052goodexcellent91excellent
070048goodexcellent71excellent
060044goodexcellent81excellent
050043goodexcellent61excellent
040042goodexcellent51excellent
030046goodexcellent61excellent
020043goodexcellent61excellent
010051goodexcellent51excellent
000041goodexcellent51excellent
230034goodexcellent41excellent
220037goodexcellent41excellent
210030goodexcellent41excellent
200025goodexcellent31excellent
190017excellentexcellent21excellent
180017excellentexcellent21excellent
170013excellentexcellent21excellent
160016excellentexcellent21excellent
150033goodexcellent31excellent
140023goodexcellent31excellent
130025goodexcellent41excellent
120033goodexcellent61excellent
110033goodexcellent51excellent
100036goodexcellent41excellent
090032goodexcellent51excellent