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
200039goodexcellent31excellent
190037goodexcellent41excellent
180039goodexcellent41excellent
170037goodexcellent41excellent
160040goodexcellent31excellent
150047goodexcellent32excellent
140073lightly pollutedexcellent31excellent
130062lightly pollutedexcellent31excellent
120063lightly pollutedexcellent41excellent
110041goodexcellent31excellent
100037goodexcellent41excellent
090036goodexcellent51excellent
080034goodexcellent51excellent
070035goodexcellent51excellent
060031goodexcellent41excellent
050035goodexcellent41excellent
040032goodexcellent41excellent
030032goodexcellent41excellent
020035goodexcellent41excellent
010031goodexcellent41excellent
000034goodexcellent41excellent
230039goodexcellent51excellent
220034goodexcellent31excellent
210026goodexcellent31excellent