ID: 5408

AQSQID: 000090228

Site Name: Calgary Central2

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

Updated: Jan. 25, 2021, 10:31 a.m.

Location: Calgary (Downtown), CC

Reporting: True, Located: True

Current AQI: 23.0

Calgary (Downtown) CC, CA: 51.047611, -114.075165

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 25, 2021, 8 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 24.0 ppb (23) 0.85 ppb (10) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 25, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) 0.85 ppb (10) N/A 4.9 μg/m3 (21) 23.0
 
Jan. 25, 2021, 6 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) 0.86 ppb (11) N/A 4.6 μg/m3 (20) 25.0
 
Jan. 25, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) 0.85 ppb (10) N/A 4.3 μg/m3 (18) 25.0
 
Jan. 25, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) 0.85 ppb (10) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 25, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.85 ppb (10) N/A 4.3 μg/m3 (18) 24.0
 
Jan. 25, 2021, 2 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.86 ppb (11) N/A 2.5 μg/m3 (11) 24.0
 
Jan. 25, 2021, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.86 ppb (11) N/A 2.7 μg/m3 (12) 24.0
 
Jan. 25, 2021, midnight N/A N/A N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.86 ppb (11) N/A 2.7 μg/m3 (12) 24.0
 
Jan. 24, 2021, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) 0.85 ppb (10) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 24, 2021, 10 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) 0.86 ppb (11) N/A 3.3 μg/m3 (14) 25.0
 
Jan. 24, 2021, 9 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 27.0 ppb (25) 0.85 ppb (10) N/A 3.7 μg/m3 (16) 25.0
 
Jan. 24, 2021, 8 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) 0.86 ppb (11) N/A 5.6 μg/m3 (24) 25.0
 
Jan. 24, 2021, 7 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 24.0 ppb (23) 0.86 ppb (11) N/A 7.1 μg/m3 (30) 30.0
 
Jan. 24, 2021, 6 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.85 ppb (10) N/A 6.5 μg/m3 (28) 28.0
 
Jan. 24, 2021, 5 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) 0.84 ppb (10) N/A 6.6 μg/m3 (28) 28.0
 
Jan. 24, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) 0.83 ppb (10) N/A 5.8 μg/m3 (25) 25.0
 
Jan. 24, 2021, 3 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 25.0 ppb (24) 0.83 ppb (10) N/A 6.1 μg/m3 (26) 26.0
 
Jan. 24, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 24.0 ppb (23) 0.83 ppb (10) N/A 5.2 μg/m3 (22) 23.0
 
Jan. 24, 2021, 1 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 24.0 ppb (23) 0.83 ppb (10) N/A 5.7 μg/m3 (24) 24.0
 
Jan. 24, 2021, noon N/A N/A N/A 10.0 ppb (10) N/A N/A 22.0 ppb (21) 0.83 ppb (10) N/A 5.6 μg/m3 (24) 24.0
 
Jan. 24, 2021, 11 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 21.0 ppb (20) 0.83 ppb (10) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
Jan. 24, 2021, 9 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 22.0 ppb (21) 0.82 ppb (10) N/A 4.7 μg/m3 (20) 21.0
 
Jan. 24, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 25.0 ppb (24) 0.81 ppb (10) N/A 3.2 μg/m3 (14) 24.0
 
Jan. 24, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 27.0 ppb (25) 0.81 ppb (10) N/A 3.8 μg/m3 (16) 25.0
 
Jan. 24, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.8 ppb (10) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 24, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.8 ppb (10) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 24, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 28.0 ppb (26) 0.81 ppb (10) N/A 6.5 μg/m3 (28) 28.0
 
Jan. 24, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.83 ppb (10) N/A 4.6 μg/m3 (20) 24.0
 
Jan. 24, 2021, 2 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) 0.82 ppb (10) N/A 3.7 μg/m3 (16) 24.0
 
Jan. 24, 2021, 1 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) 0.83 ppb (10) N/A 3.0 μg/m3 (13) 24.0
 
Jan. 24, 2021, midnight N/A N/A N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) 0.85 ppb (10) N/A 3.1 μg/m3 (13) 20.0
 
Jan. 23, 2021, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.84 ppb (10) N/A 3.0 μg/m3 (13) 24.0
 
Jan. 23, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.82 ppb (10) N/A 2.3 μg/m3 (10) 35.0
 
Jan. 23, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.81 ppb (10) N/A 2.7 μg/m3 (12) 36.0
 
Jan. 23, 2021, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 32.0 ppb (30) 0.83 ppb (10) N/A 3.2 μg/m3 (14) 30.0
 
Jan. 23, 2021, 7 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) 0.86 ppb (11) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 23, 2021, 6 p.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 13.0 ppb (13) 0.95 ppb (11) N/A 10.8 μg/m3 (46) 46.0
 
Jan. 23, 2021, 5 p.m. N/A N/A N/A 31.0 ppb (30) N/A N/A 9.0 ppb (9) 0.95 ppb (11) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 23, 2021, 4 p.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 10.0 ppb (10) 0.9 ppb (11) N/A 3.4 μg/m3 (15) 25.0
 
Jan. 23, 2021, 3 p.m. N/A N/A N/A 29.0 ppb (28) N/A N/A 7.0 ppb (7) 0.87 ppb (11) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 23, 2021, 2 p.m. N/A N/A N/A 33.0 ppb (32) N/A N/A 6.0 ppb (6) 0.87 ppb (11) N/A 6.0 μg/m3 (25) 32.0
 
Jan. 23, 2021, 1 p.m. N/A N/A N/A 33.0 ppb (32) N/A N/A 5.0 ppb (5) 0.86 ppb (11) N/A 6.7 μg/m3 (28) 32.0
 
Jan. 23, 2021, noon N/A N/A N/A 33.0 ppb (32) N/A N/A 5.0 ppb (5) 0.86 ppb (11) N/A 8.7 μg/m3 (37) 37.0
 
Jan. 23, 2021, 11 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 0.91 ppb (11) N/A 8.5 μg/m3 (36) 38.0
 
Jan. 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 23, 2021, 9 a.m. N/A N/A N/A 39.0 ppb (37) N/A N/A 1.0 ppb (1) 0.93 ppb (11) N/A 7.2 μg/m3 (31) 37.0
 
Jan. 23, 2021, 8 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 0.98 ppb (12) N/A 8.4 μg/m3 (36) 38.0
 
Jan. 23, 2021, 7 a.m. N/A N/A N/A 42.0 ppb (40) N/A N/A 1.0 ppb (1) 1.23 ppb (14) N/A 11.9 μg/m3 (50) 50.0
 
Jan. 23, 2021, 6 a.m. N/A N/A N/A 41.0 ppb (39) N/A N/A 1.0 ppb (1) 1.27 ppb (15) N/A 14.0 μg/m3 (55) 55.0
 
Jan. 23, 2021, 5 a.m. N/A N/A N/A 41.0 ppb (39) N/A N/A 1.0 ppb (1) 1.26 ppb (15) N/A 13.5 μg/m3 (54) 54.0
 
Jan. 23, 2021, 4 a.m. N/A N/A N/A 43.0 ppb (41) N/A N/A 1.0 ppb (1) 1.28 ppb (15) N/A 17.0 μg/m3 (62) 62.0
 
Jan. 23, 2021, 3 a.m. N/A N/A N/A 44.0 ppb (42) N/A N/A 2.0 ppb (2) 1.17 ppb (14) N/A 15.4 μg/m3 (58) 58.0
 
Jan. 23, 2021, 2 a.m. N/A N/A N/A 42.0 ppb (40) N/A N/A 2.0 ppb (2) 1.08 ppb (13) N/A 11.6 μg/m3 (49) 49.0
 
Jan. 23, 2021, 1 a.m. N/A N/A N/A 31.0 ppb (30) N/A N/A 10.0 ppb (10) 1.03 ppb (12) N/A 8.7 μg/m3 (37) 37.0
 
Jan. 23, 2021, midnight N/A N/A N/A 23.0 ppb (22) N/A N/A 18.0 ppb (17) 0.94 ppb (11) N/A 5.5 μg/m3 (23) 23.0
 
Jan. 22, 2021, 11 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 31.0 ppb (29) 0.82 ppb (10) N/A 2.9 μg/m3 (13) 29.0
 
Jan. 22, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.78 ppb (10) N/A 2.2 μg/m3 (10) 33.0
 
Jan. 22, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.78 ppb (10) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 22, 2021, 8 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.8 ppb (10) N/A 4.2 μg/m3 (18) 31.0
 
Jan. 22, 2021, 7 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 27.0 ppb (25) 0.85 ppb (10) N/A 5.8 μg/m3 (25) 25.0
 
Jan. 22, 2021, 6 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 27.0 ppb (25) 0.83 ppb (10) N/A 5.3 μg/m3 (23) 25.0
 
Jan. 22, 2021, 5 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 22.0 ppb (21) 0.84 ppb (10) N/A 4.2 μg/m3 (18) 21.0
 
Jan. 22, 2021, 4 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 18.0 ppb (17) 0.85 ppb (10) N/A 4.0 μg/m3 (17) 20.0
 
Jan. 22, 2021, 3 p.m. N/A N/A N/A 34.0 ppb (33) N/A N/A 6.0 ppb (6) 0.89 ppb (11) N/A 4.9 μg/m3 (21) 33.0
 
Jan. 22, 2021, 2 p.m. N/A N/A N/A 32.0 ppb (31) N/A N/A 6.0 ppb (6) 0.86 ppb (11) N/A 4.0 μg/m3 (17) 31.0
 
Jan. 22, 2021, 1 p.m. N/A N/A N/A 31.0 ppb (30) N/A N/A 6.0 ppb (6) 0.84 ppb (10) N/A 5.2 μg/m3 (22) 30.0
 
Jan. 22, 2021, noon N/A N/A N/A 36.0 ppb (34) N/A N/A 2.0 ppb (2) 0.88 ppb (11) N/A 7.5 μg/m3 (32) 34.0
 
Jan. 22, 2021, 11 a.m. N/A N/A N/A 38.0 ppb (36) N/A N/A 1.0 ppb (1) 0.89 ppb (11) N/A 8.9 μg/m3 (38) 38.0
 
Jan. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 22, 2021, 9 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 0.87 ppb (11) N/A 9.9 μg/m3 (42) 42.0
 
Jan. 22, 2021, 8 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 0.9 ppb (11) N/A 8.3 μg/m3 (35) 38.0
 
Jan. 22, 2021, 7 a.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 12.0 ppb (12) 0.81 ppb (10) N/A 3.8 μg/m3 (16) 24.0
 
Jan. 22, 2021, 6 a.m. N/A N/A N/A 34.0 ppb (33) N/A N/A 6.0 ppb (6) 0.83 ppb (10) N/A 3.7 μg/m3 (16) 33.0
 
Jan. 22, 2021, 5 a.m. N/A N/A N/A 36.0 ppb (34) N/A N/A 5.0 ppb (5) 0.88 ppb (11) N/A 4.3 μg/m3 (18) 34.0
 
Jan. 22, 2021, 4 a.m. N/A N/A N/A 43.0 ppb (41) N/A N/A 1.0 ppb (1) 1.0 ppb (12) N/A 7.0 μg/m3 (30) 41.0
 
Jan. 22, 2021, 3 a.m. N/A N/A N/A 42.0 ppb (40) N/A N/A 1.0 ppb (1) 1.1 ppb (13) N/A 8.3 μg/m3 (35) 40.0
 
Jan. 22, 2021, 2 a.m. N/A N/A N/A 36.0 ppb (34) N/A N/A 4.0 ppb (4) 1.02 ppb (12) N/A 8.1 μg/m3 (34) 34.0
 
Jan. 22, 2021, 1 a.m. N/A N/A N/A 37.0 ppb (35) N/A N/A 5.0 ppb (5) 1.01 ppb (12) N/A 6.1 μg/m3 (26) 35.0
 
Jan. 22, 2021, midnight N/A N/A N/A 18.0 ppb (17) N/A N/A 21.0 ppb (20) 0.86 ppb (11) N/A 2.9 μg/m3 (13) 20.0
 
Jan. 21, 2021, 11 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 31.0 ppb (29) 0.79 ppb (10) N/A 2.0 μg/m3 (9) 29.0
 
Jan. 21, 2021, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) 0.75 ppb (10) N/A 1.5 μg/m3 (7) 32.0
 
Jan. 21, 2021, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) 0.76 ppb (10) N/A 2.3 μg/m3 (10) 32.0
 
Jan. 21, 2021, 8 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 25.0 ppb (24) 0.84 ppb (10) N/A 5.2 μg/m3 (22) 24.0
 
Jan. 21, 2021, 7 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 21.0 ppb (20) 0.93 ppb (11) N/A 6.8 μg/m3 (29) 29.0
 
Jan. 21, 2021, 6 p.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 18.0 ppb (17) 0.88 ppb (11) N/A 7.4 μg/m3 (31) 31.0
 
Jan. 21, 2021, 5 p.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 15.0 ppb (14) 0.86 ppb (11) N/A 7.5 μg/m3 (32) 32.0
 
Jan. 21, 2021, 4 p.m. N/A N/A N/A 41.0 ppb (39) N/A N/A 7.0 ppb (7) 0.97 ppb (12) N/A 8.0 μg/m3 (34) 39.0
 
Jan. 21, 2021, 3 p.m. N/A N/A N/A 43.0 ppb (41) N/A N/A 2.0 ppb (2) 0.95 ppb (11) N/A 6.1 μg/m3 (26) 41.0
 
Jan. 21, 2021, 2 p.m. N/A N/A N/A 38.0 ppb (36) N/A N/A 3.0 ppb (3) 0.87 ppb (11) N/A 3.9 μg/m3 (17) 36.0
 
Jan. 21, 2021, 1 p.m. N/A N/A N/A 28.0 ppb (27) N/A N/A 11.0 ppb (11) 0.81 ppb (10) N/A 2.5 μg/m3 (11) 27.0
 
Jan. 21, 2021, noon N/A N/A N/A 26.0 ppb (25) N/A N/A 13.0 ppb (13) 0.79 ppb (10) N/A 1.9 μg/m3 (8) 25.0
 
Jan. 21, 2021, 11 a.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 14.0 ppb (13) 0.77 ppb (10) N/A 0.9 μg/m3 (4) 24.0
 
Jan. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
Jan. 21, 2021, 9 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 17.0 ppb (16) 0.77 ppb (10) N/A 1.2 μg/m3 (5) 21.0
 
Jan. 21, 2021, 8 a.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 14.0 ppb (13) 0.78 ppb (10) N/A 2.1 μg/m3 (9) 26.0
 
Jan. 21, 2021, 7 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 19.0 ppb (18) 0.76 ppb (10) N/A 1.9 μg/m3 (8) 21.0
 
Jan. 21, 2021, 6 a.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 24.0 ppb (23) 0.76 ppb (10) N/A 2.3 μg/m3 (10) 23.0
 
Jan. 21, 2021, 5 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 28.0 ppb (26) 0.77 ppb (10) N/A 3.4 μg/m3 (15) 26.0
 
Jan. 21, 2021, 4 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 29.0 ppb (27) 0.75 ppb (10) N/A 2.7 μg/m3 (12) 27.0
 
Jan. 21, 2021, 3 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 31.0 ppb (29) 0.74 ppb (8) N/A 2.6 μg/m3 (11) 29.0
 
Jan. 21, 2021, 2 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 34.0 ppb (32) 0.73 ppb (8) N/A 2.3 μg/m3 (10) 32.0
 
Jan. 21, 2021, 1 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 32.0 ppb (30) 0.75 ppb (10) N/A 3.2 μg/m3 (14) 30.0
 
Jan. 21, 2021, midnight N/A N/A N/A 11.0 ppb (11) N/A N/A 32.0 ppb (30) 0.75 ppb (10) N/A 3.0 μg/m3 (13) 30.0
 
Jan. 20, 2021, 11 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 34.0 ppb (32) 0.75 ppb (10) N/A 2.5 μg/m3 (11) 32.0
 
Jan. 20, 2021, 10 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 37.0 ppb (35) 0.73 ppb (8) N/A 2.4 μg/m3 (10) 35.0
 
Jan. 20, 2021, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.72 ppb (8) N/A 2.3 μg/m3 (10) 37.0
 
Jan. 20, 2021, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) 0.71 ppb (8) N/A 1.9 μg/m3 (8) 39.0
 
Jan. 20, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 41.0 ppb (38) 0.72 ppb (8) N/A 2.3 μg/m3 (10) 38.0
 
Jan. 20, 2021, 6 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 41.0 ppb (38) 0.71 ppb (8) N/A 2.5 μg/m3 (11) 38.0
 
Jan. 20, 2021, 5 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 38.0 ppb (36) 0.72 ppb (8) N/A 2.6 μg/m3 (11) 36.0
 
Jan. 20, 2021, 4 p.m. N/A N/A N/A 39.0 ppb (37) N/A N/A 11.0 ppb (11) 1.02 ppb (12) N/A 5.7 μg/m3 (24) 37.0
 
Jan. 20, 2021, 3 p.m. N/A N/A N/A 51.0 ppb (49) N/A N/A 1.0 ppb (1) 1.25 ppb (14) N/A 7.7 μg/m3 (33) 49.0
 
Jan. 20, 2021, 2 p.m. N/A N/A N/A 55.0 ppb (53) N/A N/A 1.0 ppb (1) 1.04 ppb (12) N/A 4.2 μg/m3 (18) 53.0
 
Jan. 20, 2021, 1 p.m. N/A N/A N/A 43.0 ppb (41) N/A N/A 1.0 ppb (1) 0.81 ppb (10) N/A 2.7 μg/m3 (12) 41.0
 
Jan. 20, 2021, noon N/A N/A N/A 37.0 ppb (35) N/A N/A 3.0 ppb (3) 0.78 ppb (10) N/A 2.4 μg/m3 (10) 35.0
 
Jan. 20, 2021, 11 a.m. N/A N/A N/A 35.0 ppb (34) N/A N/A 6.0 ppb (6) 0.76 ppb (10) N/A 2.2 μg/m3 (10) 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 1.1 μg/m3 (5) 5.0
 
Jan. 20, 2021, 9 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 29.0 ppb (27) 0.71 ppb (8) N/A 1.0 μg/m3 (5) 27.0
 
Jan. 20, 2021, 8 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.7 ppb (8) N/A 0.9 μg/m3 (4) 31.0
 
Jan. 20, 2021, 7 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.68 ppb (8) N/A 0.9 μg/m3 (4) 35.0
 
Jan. 20, 2021, 6 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 36.0 ppb (34) 0.67 ppb (8) N/A 1.1 μg/m3 (5) 34.0
 
Jan. 20, 2021, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) 0.67 ppb (8) N/A 1.1 μg/m3 (5) 36.0
 
Jan. 20, 2021, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 34.0 ppb (32) 0.67 ppb (8) N/A 1.7 μg/m3 (8) 32.0
 
Jan. 20, 2021, 3 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) 0.67 ppb (8) N/A 1.4 μg/m3 (6) 30.0
 
Jan. 20, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) 0.68 ppb (8) N/A 1.8 μg/m3 (8) 32.0
 
Jan. 20, 2021, 1 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) 0.67 ppb (8) N/A 1.7 μg/m3 (8) 32.0
 
Jan. 20, 2021, midnight N/A N/A N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) 0.67 ppb (8) N/A 1.6 μg/m3 (7) 32.0
 
Jan. 19, 2021, 11 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 31.0 ppb (29) 0.69 ppb (8) N/A 1.8 μg/m3 (8) 29.0
 
Jan. 19, 2021, 10 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 34.0 ppb (32) 0.69 ppb (8) N/A 1.7 μg/m3 (8) 32.0
 
Jan. 19, 2021, 9 p.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 19.0 ppb (18) 0.82 ppb (10) N/A 5.8 μg/m3 (25) 26.0
 
Jan. 19, 2021, 8 p.m. N/A N/A N/A 33.0 ppb (32) N/A N/A 14.0 ppb (13) 0.86 ppb (11) N/A 5.7 μg/m3 (24) 32.0
 
Jan. 19, 2021, 7 p.m. N/A N/A N/A 37.0 ppb (35) N/A N/A 12.0 ppb (12) 1.03 ppb (12) N/A 9.6 μg/m3 (40) 40.0
 
Jan. 19, 2021, 6 p.m. N/A N/A N/A 43.0 ppb (41) N/A N/A 5.0 ppb (5) 1.07 ppb (13) N/A 10.1 μg/m3 (43) 43.0
 
Jan. 19, 2021, 5 p.m. N/A N/A N/A 39.0 ppb (37) N/A N/A 6.0 ppb (6) 1.02 ppb (12) N/A 8.5 μg/m3 (36) 37.0
 
Jan. 19, 2021, 4 p.m. N/A N/A N/A 43.0 ppb (41) N/A N/A 3.0 ppb (3) 1.05 ppb (13) N/A 5.1 μg/m3 (22) 41.0
 
Jan. 19, 2021, 3 p.m. N/A N/A N/A 43.0 ppb (41) N/A N/A N/A 1.06 ppb (13) N/A 4.6 μg/m3 (20) 41.0
 
Jan. 19, 2021, 2 p.m. N/A N/A N/A 54.0 ppb (51) N/A N/A N/A 0.99 ppb (12) N/A 5.1 μg/m3 (22) 51.0
 
Jan. 19, 2021, 1 p.m. N/A N/A N/A 39.0 ppb (37) N/A N/A N/A 0.87 ppb (11) N/A 3.4 μg/m3 (15) 37.0
 
Jan. 19, 2021, noon N/A N/A N/A 35.0 ppb (34) N/A N/A N/A 0.78 ppb (10) N/A 2.9 μg/m3 (13) 34.0
 
Jan. 19, 2021, 11 a.m. N/A N/A N/A 37.0 ppb (35) N/A N/A N/A 0.83 ppb (10) N/A 5.4 μg/m3 (23) 35.0
 
Jan. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
Jan. 19, 2021, 9 a.m. N/A N/A N/A 35.0 ppb (34) N/A N/A 1.0 ppb (1) 1.01 ppb (12) N/A 7.8 μg/m3 (33) 34.0
 
Jan. 19, 2021, 8 a.m. N/A N/A N/A 35.0 ppb (34) N/A N/A 1.0 ppb (1) 0.98 ppb (12) N/A 7.3 μg/m3 (31) 34.0
 
Jan. 19, 2021, 7 a.m. N/A N/A N/A 38.0 ppb (36) N/A N/A 1.0 ppb (1) 1.13 ppb (13) N/A 8.5 μg/m3 (36) 36.0
 
Jan. 19, 2021, 6 a.m. N/A N/A N/A 39.0 ppb (37) N/A N/A 1.0 ppb (1) 1.29 ppb (15) N/A 9.9 μg/m3 (42) 42.0
 
Jan. 19, 2021, 5 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 1.3 ppb (15) N/A 11.2 μg/m3 (47) 47.0
 
Jan. 19, 2021, 4 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 1.11 ppb (13) N/A 9.1 μg/m3 (38) 38.0
 
Jan. 19, 2021, 3 a.m. N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 ppb (1) 1.0 ppb (12) N/A 8.0 μg/m3 (34) 38.0
 
Jan. 19, 2021, 2 a.m. N/A N/A N/A 38.0 ppb (36) N/A N/A 2.0 ppb (2) 0.93 ppb (11) N/A 6.8 μg/m3 (29) 36.0
 
Jan. 19, 2021, 1 a.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 15.0 ppb (14) 0.8 ppb (10) N/A 3.7 μg/m3 (16) 23.0
 
Jan. 19, 2021, midnight N/A N/A N/A 17.0 ppb (17) N/A N/A 23.0 ppb (22) 0.73 ppb (8) N/A 3.0 μg/m3 (13) 22.0
 
Jan. 18, 2021, 11 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 26.0 ppb (25) 0.72 ppb (8) N/A 2.2 μg/m3 (10) 25.0
 
Jan. 18, 2021, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 33.0 ppb (31) 0.67 ppb (8) N/A 1.5 μg/m3 (7) 31.0
 
Jan. 18, 2021, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) 0.65 ppb (8) N/A 1.4 μg/m3 (6) 32.0
 
Jan. 18, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.63 ppb (7) N/A 1.0 μg/m3 (5) 35.0
 
Jan. 18, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 33.0 ppb (31) 0.65 ppb (8) N/A 1.7 μg/m3 (8) 31.0
 
Jan. 18, 2021, 6 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 30.0 ppb (28) 0.66 ppb (8) N/A 1.8 μg/m3 (8) 28.0
 
Jan. 18, 2021, 5 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 26.0 ppb (25) 0.67 ppb (8) N/A 1.9 μg/m3 (8) 25.0
 
Jan. 18, 2021, 4 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 22.0 ppb (21) 0.68 ppb (8) N/A 2.2 μg/m3 (10) 21.0
 
Jan. 18, 2021, 3 p.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 12.0 ppb (12) 0.75 ppb (10) N/A 2.5 μg/m3 (11) 24.0
 
Jan. 18, 2021, 2 p.m. N/A N/A N/A 34.0 ppb (33) N/A N/A 3.0 ppb (3) 0.81 ppb (10) N/A 3.3 μg/m3 (14) 33.0
 
Jan. 18, 2021, 1 p.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 12.0 ppb (12) 0.73 ppb (8) N/A 2.2 μg/m3 (10) 24.0
 
Jan. 18, 2021, noon N/A N/A N/A 14.0 ppb (14) N/A N/A 22.0 ppb (21) 0.67 ppb (8) N/A 1.1 μg/m3 (5) 21.0
 
Jan. 18, 2021, 11 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 26.0 ppb (25) 0.66 ppb (8) N/A 0.7 μg/m3 (3) 25.0
 
Jan. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
Jan. 18, 2021, 9 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 24.0 ppb (23) 0.63 ppb (7) N/A 0.9 μg/m3 (4) 23.0