ID: 1309

AQSQID: 000090130

Site Name: Edmonton Central

Added: April 21, 2020, 6:24 p.m.

Updated: Jan. 25, 2021, 11:31 a.m.

Location: Edmonton (Sir Winston Churchill Square), CC

Reporting: True, Located: True

Current AQI: 21.0

Edmonton (Sir Winston Churchill Square) CC, CA: 53.5453, -113.4992

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 25, 2021, 9 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 22.0 ppb (21) N/A N/A 2.7 μg/m3 (12) 21.0
 
Jan. 25, 2021, 8 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 24.0 ppb (23) N/A N/A 1.7 μg/m3 (8) 23.0
 
Jan. 25, 2021, 7 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 26.0 ppb (25) N/A N/A 5.5 μg/m3 (23) 25.0
 
Jan. 25, 2021, 6 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 26.0 ppb (25) N/A N/A 3.0 μg/m3 (13) 25.0
 
Jan. 25, 2021, 5 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) N/A N/A 1.9 μg/m3 (8) 26.0
 
Jan. 25, 2021, 4 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) N/A N/A -2.6 μg/m3 (0) 26.0
 
Jan. 25, 2021, 2 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) N/A N/A 2.0 μg/m3 (9) 26.0
 
Jan. 25, 2021, 1 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) N/A N/A 0.5 μg/m3 (3) 26.0
 
Jan. 25, 2021, midnight N/A N/A N/A 14.0 ppb (14) N/A N/A 26.0 ppb (25) N/A N/A 4.7 μg/m3 (20) 25.0
 
Jan. 24, 2021, 11 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) N/A N/A 4.2 μg/m3 (18) 26.0
 
Jan. 24, 2021, 10 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 29.0 ppb (27) N/A N/A 1.2 μg/m3 (5) 27.0
 
Jan. 24, 2021, 9 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) N/A N/A 0.6 μg/m3 (3) 28.0
 
Jan. 24, 2021, 8 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) N/A N/A 4.2 μg/m3 (18) 28.0
 
Jan. 24, 2021, 7 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 29.0 ppb (27) N/A N/A -0.4 μg/m3 (0) 27.0
 
Jan. 24, 2021, 6 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) N/A N/A -1.0 μg/m3 (0) 26.0
 
Jan. 24, 2021, 5 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
Jan. 24, 2021, 4 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
Jan. 24, 2021, 3 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 26.0 ppb (25) N/A N/A 0.1 μg/m3 (1) 25.0
 
Jan. 24, 2021, 1 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 25.0 ppb (24) N/A N/A 1.4 μg/m3 (6) 24.0
 
Jan. 24, 2021, noon N/A N/A N/A 13.0 ppb (13) N/A N/A 25.0 ppb (24) N/A N/A 5.4 μg/m3 (23) 24.0
 
Jan. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.3 μg/m3 (2) 2.0
 
Jan. 24, 2021, 9 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 23.0 ppb (22) N/A N/A -1.2 μg/m3 (0) 22.0
 
Jan. 24, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 1.8 μg/m3 (8) 24.0
 
Jan. 24, 2021, 6 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) N/A N/A 3.5 μg/m3 (15) 26.0
 
Jan. 24, 2021, 5 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 28.0 ppb (26) N/A N/A 0.4 μg/m3 (2) 26.0
 
Jan. 24, 2021, 4 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 27.0 ppb (25) N/A N/A -3.8 μg/m3 (0) 25.0
 
Jan. 24, 2021, 3 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 29.0 ppb (27) N/A N/A 3.4 μg/m3 (15) 27.0
 
Jan. 24, 2021, 2 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 26.0 ppb (25) N/A N/A 5.1 μg/m3 (22) 25.0
 
Jan. 24, 2021, 1 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 25.0 ppb (24) N/A N/A 2.8 μg/m3 (12) 24.0
 
Jan. 24, 2021, midnight N/A N/A N/A 22.0 ppb (21) N/A N/A 19.0 ppb (18) N/A N/A 3.5 μg/m3 (15) 21.0
 
Jan. 23, 2021, 11 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 20.0 ppb (19) N/A N/A 6.5 μg/m3 (28) 28.0
 
Jan. 23, 2021, 10 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 25.0 ppb (24) N/A N/A 1.7 μg/m3 (8) 24.0
 
Jan. 23, 2021, 9 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) N/A N/A -0.2 μg/m3 (0) 26.0
 
Jan. 23, 2021, 8 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) N/A N/A 4.4 μg/m3 (19) 26.0
 
Jan. 23, 2021, 7 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 29.0 ppb (27) N/A N/A 4.4 μg/m3 (19) 27.0
 
Jan. 23, 2021, 6 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) N/A N/A -1.5 μg/m3 (0) 26.0
 
Jan. 23, 2021, 5 p.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 26.0 ppb (25) N/A N/A 2.1 μg/m3 (9) 25.0
 
Jan. 23, 2021, 4 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 26.0 ppb (25) N/A N/A 10.6 μg/m3 (45) 45.0
 
Jan. 23, 2021, 3 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 28.0 ppb (26) N/A N/A 1.1 μg/m3 (5) 26.0
 
Jan. 23, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) N/A N/A 2.4 μg/m3 (10) 30.0
 
Jan. 23, 2021, 1 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 31.0 ppb (29) N/A N/A 1.5 μg/m3 (7) 29.0
 
Jan. 23, 2021, noon N/A N/A N/A 8.0 ppb (8) N/A N/A 33.0 ppb (31) N/A N/A -0.5 μg/m3 (0) 31.0
 
Jan. 23, 2021, 11 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 27.0 ppb (25) N/A N/A -0.9 μg/m3 (0) 25.0
 
Jan. 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Jan. 23, 2021, 9 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 24.0 ppb (23) N/A N/A -3.5 μg/m3 (0) 23.0
 
Jan. 23, 2021, 8 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) N/A N/A -1.3 μg/m3 (0) 24.0
 
Jan. 23, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) N/A N/A -1.2 μg/m3 (0) 25.0
 
Jan. 23, 2021, 5 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 25.0 ppb (24) N/A N/A -3.6 μg/m3 (0) 24.0
 
Jan. 23, 2021, 4 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 28.0 ppb (26) N/A N/A 1.9 μg/m3 (8) 26.0
 
Jan. 23, 2021, 3 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 24.0 ppb (23) N/A N/A 5.0 μg/m3 (21) 23.0
 
Jan. 23, 2021, 2 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 22.0 ppb (21) N/A N/A 1.8 μg/m3 (8) 21.0
 
Jan. 23, 2021, 1 a.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 20.0 ppb (19) N/A N/A 3.7 μg/m3 (16) 19.0
 
Jan. 23, 2021, midnight N/A N/A N/A 16.0 ppb (16) N/A N/A 21.0 ppb (20) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 22, 2021, 11 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 22.0 ppb (21) N/A N/A 3.6 μg/m3 (16) 21.0
 
Jan. 22, 2021, 10 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 24.0 ppb (23) N/A N/A 0.4 μg/m3 (2) 23.0
 
Jan. 22, 2021, 9 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 27.0 ppb (25) N/A N/A 0.3 μg/m3 (2) 25.0
 
Jan. 22, 2021, 8 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) N/A N/A -1.3 μg/m3 (0) 26.0
 
Jan. 22, 2021, 7 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) N/A N/A 6.5 μg/m3 (28) 28.0
 
Jan. 22, 2021, 6 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 23.0 ppb (22) N/A N/A 3.5 μg/m3 (15) 22.0
 
Jan. 22, 2021, 5 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 19.0 ppb (18) N/A N/A 3.3 μg/m3 (14) 18.0
 
Jan. 22, 2021, 3 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 13.0 ppb (13) N/A N/A 3.6 μg/m3 (16) 23.0
 
Jan. 22, 2021, 2 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 13.0 ppb (13) N/A N/A 2.5 μg/m3 (11) 20.0
 
Jan. 22, 2021, 1 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 16.0 ppb (15) N/A N/A 6.1 μg/m3 (26) 26.0
 
Jan. 22, 2021, noon N/A N/A N/A 17.0 ppb (17) N/A N/A 16.0 ppb (15) N/A N/A 2.5 μg/m3 (11) 17.0
 
Jan. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -2.1 μg/m3 (0) 0.0
Jan. 22, 2021, 9 a.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 20.0 ppb (19) N/A N/A 0.8 μg/m3 (4) 19.0
 
Jan. 22, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 30.0 ppb (28) N/A N/A -2.8 μg/m3 (0) 28.0
 
Jan. 22, 2021, 7 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 25.0 ppb (24) N/A N/A -0.1 μg/m3 (0) 24.0
 
Jan. 22, 2021, 6 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 18.0 ppb (17) N/A N/A -0.7 μg/m3 (0) 18.0
 
Jan. 22, 2021, 5 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 18.0 ppb (17) N/A N/A 0.9 μg/m3 (4) 18.0
 
Jan. 22, 2021, 4 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 19.0 ppb (18) N/A N/A -0.6 μg/m3 (0) 18.0
 
Jan. 22, 2021, 3 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 21.0 ppb (20) N/A N/A 1.1 μg/m3 (5) 20.0
 
Jan. 22, 2021, 2 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 21.0 ppb (20) N/A N/A 3.7 μg/m3 (16) 20.0
 
Jan. 22, 2021, 1 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 23.0 ppb (22) N/A N/A 3.7 μg/m3 (16) 22.0
 
Jan. 22, 2021, midnight N/A N/A N/A 20.0 ppb (19) N/A N/A 18.0 ppb (17) N/A N/A 1.0 μg/m3 (5) 19.0
 
Jan. 21, 2021, 11 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 20.0 ppb (19) N/A N/A 1.5 μg/m3 (7) 19.0
 
Jan. 21, 2021, 10 p.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 25.0 ppb (24) N/A N/A -1.1 μg/m3 (0) 24.0
 
Jan. 21, 2021, 9 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 24.0 ppb (23) N/A N/A 0.5 μg/m3 (3) 23.0
 
Jan. 21, 2021, 8 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 22.0 ppb (21) N/A N/A 0.5 μg/m3 (3) 21.0
 
Jan. 21, 2021, 7 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 19.0 ppb (18) N/A N/A 2.9 μg/m3 (13) 18.0
 
Jan. 21, 2021, 6 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 18.0 ppb (17) N/A N/A -1.1 μg/m3 (0) 19.0
 
Jan. 21, 2021, 5 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 15.0 ppb (14) N/A N/A 3.5 μg/m3 (15) 23.0
 
Jan. 21, 2021, 4 p.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 10.0 ppb (10) N/A N/A 0.5 μg/m3 (3) 26.0
 
Jan. 21, 2021, 3 p.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 14.0 ppb (13) N/A N/A -2.0 μg/m3 (0) 21.0
 
Jan. 21, 2021, 2 p.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 12.0 ppb (12) N/A N/A -1.2 μg/m3 (0) 25.0
 
Jan. 21, 2021, 1 p.m. N/A N/A N/A 29.0 ppb (28) N/A N/A 10.0 ppb (10) N/A N/A 0.7 μg/m3 (3) 28.0
 
Jan. 21, 2021, noon N/A N/A N/A 20.0 ppb (19) N/A N/A 20.0 ppb (19) N/A N/A 1.1 μg/m3 (5) 19.0
 
Jan. 21, 2021, 11 a.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 18.0 ppb (17) N/A N/A 1.2 μg/m3 (5) 20.0
 
Jan. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 21, 2021, 9 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 21.0 ppb (20) N/A N/A 4.0 μg/m3 (17) 20.0
 
Jan. 21, 2021, 8 a.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 17.0 ppb (16) N/A N/A -0.1 μg/m3 (0) 22.0
 
Jan. 21, 2021, 7 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 27.0 ppb (25) N/A N/A -2.4 μg/m3 (0) 25.0
 
Jan. 21, 2021, 6 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 29.0 ppb (27) N/A N/A -4.0 μg/m3 (0) 27.0
 
Jan. 21, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 32.0 ppb (30) N/A N/A 0.6 μg/m3 (3) 30.0
 
Jan. 21, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) N/A N/A -0.4 μg/m3 (0) 31.0
 
Jan. 21, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) N/A N/A 2.1 μg/m3 (9) 31.0
 
Jan. 20, 2021, 11 p.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 27.0 ppb (25) N/A N/A -1.0 μg/m3 (0) 25.0
 
Jan. 20, 2021, 10 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 24.0 ppb (23) N/A N/A 4.8 μg/m3 (20) 23.0
 
Jan. 20, 2021, 9 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 30.0 ppb (28) N/A N/A 0.6 μg/m3 (3) 28.0
 
Jan. 20, 2021, 8 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) N/A N/A -2.6 μg/m3 (0) 30.0
 
Jan. 20, 2021, 7 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) N/A N/A 6.1 μg/m3 (26) 30.0
 
Jan. 20, 2021, 6 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 35.0 ppb (33) N/A N/A 3.2 μg/m3 (14) 33.0
 
Jan. 20, 2021, 5 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 33.0 ppb (31) N/A N/A 0.5 μg/m3 (3) 31.0
 
Jan. 20, 2021, 4 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 33.0 ppb (31) N/A N/A N/A 31.0
 
Jan. 20, 2021, 3 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 31.0 ppb (29) N/A N/A -0.5 μg/m3 (0) 29.0
 
Jan. 20, 2021, 2 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 32.0 ppb (30) N/A N/A 1.7 μg/m3 (8) 30.0
 
Jan. 20, 2021, 1 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 33.0 ppb (31) N/A N/A 0.0 μg/m3 (0) 31.0
 
Jan. 20, 2021, noon N/A N/A N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) N/A N/A -4.4 μg/m3 (0) 33.0
 
Jan. 20, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) N/A N/A -0.1 μg/m3 (0) 34.0
 
Jan. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.0
Jan. 20, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) N/A N/A -0.5 μg/m3 (0) 35.0
 
Jan. 20, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
Jan. 20, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
Jan. 20, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) N/A N/A -4.8 μg/m3 (0) 35.0
 
Jan. 20, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) N/A N/A 0.5 μg/m3 (3) 32.0
 
Jan. 20, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
Jan. 20, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) N/A N/A -3.6 μg/m3 (0) 36.0
 
Jan. 20, 2021, 2 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) N/A N/A 2.0 μg/m3 (9) 30.0
 
Jan. 20, 2021, 1 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 25.0 ppb (24) N/A N/A N/A 24.0
 
Jan. 20, 2021, midnight N/A N/A N/A 17.0 ppb (17) N/A N/A 23.0 ppb (22) N/A N/A 3.7 μg/m3 (16) 22.0
 
Jan. 19, 2021, 11 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 20.0 ppb (19) N/A N/A -3.5 μg/m3 (0) 22.0
 
Jan. 19, 2021, 10 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 19.0 ppb (18) N/A N/A 3.9 μg/m3 (17) 22.0
 
Jan. 19, 2021, 9 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 20.0 ppb (19) N/A N/A 3.5 μg/m3 (15) 23.0
 
Jan. 19, 2021, 8 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 21.0 ppb (20) N/A N/A 3.5 μg/m3 (15) 22.0
 
Jan. 19, 2021, 7 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 21.0 ppb (20) N/A N/A 3.4 μg/m3 (15) 20.0
 
Jan. 19, 2021, 6 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 21.0 ppb (20) N/A N/A 1.2 μg/m3 (5) 20.0
 
Jan. 19, 2021, 5 p.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 18.0 ppb (17) N/A N/A 0.6 μg/m3 (3) 21.0
 
Jan. 19, 2021, 4 p.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 15.0 ppb (14) N/A N/A -2.8 μg/m3 (0) 25.0
 
Jan. 19, 2021, 3 p.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 16.0 ppb (15) N/A N/A 0.3 μg/m3 (2) 24.0
 
Jan. 19, 2021, 2 p.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 16.0 ppb (15) N/A N/A 3.2 μg/m3 (14) 21.0
 
Jan. 19, 2021, 1 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 15.0 ppb (14) N/A N/A -2.6 μg/m3 (0) 22.0
 
Jan. 19, 2021, noon N/A N/A N/A 19.0 ppb (18) N/A N/A 19.0 ppb (18) N/A N/A -0.8 μg/m3 (0) 18.0
 
Jan. 19, 2021, 11 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 17.0 ppb (16) N/A N/A -0.8 μg/m3 (0) 19.0
 
Jan. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.5 μg/m3 (36) 36.0
 
Jan. 19, 2021, 9 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 25.0 ppb (24) N/A N/A -4.1 μg/m3 (0) 24.0
 
Jan. 19, 2021, 8 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 24.0 ppb (23) N/A N/A 1.5 μg/m3 (7) 23.0
 
Jan. 19, 2021, 7 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 23.0 ppb (22) N/A N/A N/A 22.0
 
Jan. 19, 2021, 6 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 21.0 ppb (20) N/A N/A 0.3 μg/m3 (2) 20.0
 
Jan. 19, 2021, 5 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 19.0 ppb (18) N/A N/A 0.0 μg/m3 (0) 18.0
 
Jan. 19, 2021, 4 a.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 21.0 ppb (20) N/A N/A 3.2 μg/m3 (14) 20.0
 
Jan. 19, 2021, 3 a.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 14.0 ppb (13) N/A N/A 4.2 μg/m3 (18) 23.0
 
Jan. 19, 2021, 2 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 25.0 ppb (24) N/A N/A 0.9 μg/m3 (4) 24.0
 
Jan. 19, 2021, 1 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 19.0 ppb (18) N/A N/A 6.1 μg/m3 (26) 26.0
 
Jan. 19, 2021, midnight N/A N/A N/A 16.0 ppb (16) N/A N/A 23.0 ppb (22) N/A N/A 3.2 μg/m3 (14) 22.0
 
Jan. 18, 2021, 11 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 21.0 ppb (20) N/A N/A 4.8 μg/m3 (20) 20.0
 
Jan. 18, 2021, 10 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) N/A N/A 1.1 μg/m3 (5) 26.0
 
Jan. 18, 2021, 9 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 29.0 ppb (27) N/A N/A -0.9 μg/m3 (0) 27.0
 
Jan. 18, 2021, 8 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 24.0 ppb (23) N/A N/A 5.4 μg/m3 (23) 23.0
 
Jan. 18, 2021, 7 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 24.0 ppb (23) N/A N/A -0.3 μg/m3 (0) 23.0
 
Jan. 18, 2021, 6 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 26.0 ppb (25) N/A N/A -0.6 μg/m3 (0) 25.0
 
Jan. 18, 2021, 5 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 20.0 ppb (19) N/A N/A 5.2 μg/m3 (22) 22.0
 
Jan. 18, 2021, 4 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) N/A N/A 0.8 μg/m3 (4) 24.0
 
Jan. 18, 2021, 3 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 26.0 ppb (25) N/A N/A -4.2 μg/m3 (0) 25.0
 
Jan. 18, 2021, 2 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 24.0 ppb (23) N/A N/A -0.2 μg/m3 (0) 23.0
 
Jan. 18, 2021, 1 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 16.0 ppb (15) N/A N/A 1.7 μg/m3 (8) 17.0
 
Jan. 18, 2021, noon N/A N/A N/A 20.0 ppb (19) N/A N/A 14.0 ppb (13) N/A N/A -0.1 μg/m3 (0) 19.0
 
Jan. 18, 2021, 11 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 14.0 ppb (13) N/A N/A -0.1 μg/m3 (0) 18.0
 
Jan. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 18, 2021, 9 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 21.0 ppb (20) N/A N/A 4.6 μg/m3 (20) 20.0
 
Jan. 18, 2021, 8 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 18.0 ppb (17) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 18, 2021, 7 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 18.0 ppb (17) N/A N/A -2.7 μg/m3 (0) 17.0
 
Jan. 18, 2021, 6 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 21.0 ppb (20) N/A N/A -0.4 μg/m3 (0) 20.0
 
Jan. 18, 2021, 5 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 27.0 ppb (25) N/A N/A -2.7 μg/m3 (0) 25.0
 
Jan. 18, 2021, 4 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 26.0 ppb (25) N/A N/A 2.0 μg/m3 (9) 25.0
 
Jan. 18, 2021, 3 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 27.0 ppb (25) N/A N/A 3.5 μg/m3 (15) 25.0
 
Jan. 18, 2021, 2 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 27.0 ppb (25) N/A N/A -1.0 μg/m3 (0) 25.0
 
Jan. 18, 2021, 1 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) N/A N/A -1.4 μg/m3 (0) 25.0
 
Jan. 18, 2021, midnight N/A N/A N/A 11.0 ppb (11) N/A N/A 23.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0