Legend (Airbase/Arsenic_As)

As in PM10 (aerosol) (2) ≤ 1 2 - 3 3 - 6 6 - 9 >9 As (aerosol) (4) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on daily values (6) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on yearly values (7) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on variable time intervals (8) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on monthly values (9) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on weekly values (10) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on daily values (12) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on yearly values (13) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on variable time intervals (14) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on monthly values (15) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on weekly values (16) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on daily values (18) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on yearly values (19) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on variable time intervals (20) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on monthly values (21) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on weekly values (22) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on daily values (24) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on yearly values (25) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on variable time intervals (26) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on monthly values (27) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on weekly values (28) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on daily values (30) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on yearly values (31) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on variable time intervals (32) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on monthly values (33) ≤ 1 1 - 3 3 - 6 6 - 9 >9 based on weekly values (34) ≤ 1 1 - 3 3 - 6 6 - 9 >9 Airbase_Stations (35) Background Industrial Traffic Unknown <all other values>