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
140034goodexcellent21excellent
130013excellentexcellent21excellent
120028goodexcellent31excellent
110057goodexcellent21excellent
100022goodexcellent11excellent
090012excellentexcellent21excellent
080010excellentexcellent21excellent
070013excellentexcellent21excellent
060013excellentexcellent31excellent
050012excellentexcellent21excellent
040012excellentexcellent21excellent
030012excellentexcellent21excellent
020015excellentexcellent31excellent
010016excellentexcellent21excellent
000017excellentexcellent21excellent
230013excellentexcellent21excellent
22008excellentexcellent21excellent
21006excellentexcellent21excellent
20004excellentexcellent11excellent
19003excellentexcellent11excellent
18003excellentexcellent11excellent
17006excellentexcellent11excellent
16004excellentexcellent11excellent
150057goodexcellent11excellent