ID: 1997

AQSQID: 000100134

Site Name: Vancouver Airport

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

Updated: April 11, 2021, 4:43 a.m.

Location: Richmond (Marpole), CC

Reporting: True, Located: True

Current AQI: 38.0

Richmond (Marpole) CC, CA: 49.18639, -123.15222

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 11, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
April 11, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.1 μg/m3 (18) 39.0
 
April 11, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.2 μg/m3 (18) 40.0
 
April 11, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.1 μg/m3 (18) 40.0
 
April 10, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.6 μg/m3 (11) 40.0
 
April 10, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.8 μg/m3 (12) 41.0
 
April 10, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.0 μg/m3 (13) 40.0
 
April 10, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.7 μg/m3 (16) 40.0
 
April 10, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.2 μg/m3 (18) 40.0
 
April 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
April 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.9 μg/m3 (17) 40.0
 
April 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.9 μg/m3 (17) 40.0
 
April 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 3.3 μg/m3 (14) 38.0
 
April 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 38.0
 
April 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.3 μg/m3 (6) 40.0
 
April 10, 2021, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.3 μg/m3 (6) 41.0
 
April 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 0.8 μg/m3 (4) 44.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.3 μg/m3 (10) 41.0
 
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.4 μg/m3 (10) 40.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 2.6 μg/m3 (11) 38.0
 
April 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.4 μg/m3 (10) 37.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.4 μg/m3 (6) 36.0
 
April 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.6 μg/m3 (7) 37.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 2.2 μg/m3 (10) 38.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
April 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
April 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.3 μg/m3 (18) 37.0
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.4 μg/m3 (19) 38.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 3.4 μg/m3 (15) 38.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.1 μg/m3 (18) 34.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.4 μg/m3 (23) 33.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.2 μg/m3 (22) 34.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.8 μg/m3 (16) 37.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.7 μg/m3 (16) 36.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.4 μg/m3 (15) 38.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.1 μg/m3 (18) 30.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 6.4 μg/m3 (27) 27.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 4.9 μg/m3 (21) 21.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 4.8 μg/m3 (20) 23.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 4.0 μg/m3 (17) 33.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 4.7 μg/m3 (20) 25.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.9 μg/m3 (13) 36.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.8 μg/m3 (16) 31.0
 
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 1.5 μg/m3 (7) 32.0
 
April 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 1.9 μg/m3 (8) 35.0
 
April 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
April 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.9 μg/m3 (17) 38.0
 
April 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.5 μg/m3 (11) 40.0
 
April 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.2 μg/m3 (10) 41.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 1.8 μg/m3 (8) 43.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 1.8 μg/m3 (8) 43.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.7 μg/m3 (8) 40.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.0 μg/m3 (9) 40.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.3 μg/m3 (10) 39.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.9 μg/m3 (8) 39.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.4 μg/m3 (6) 36.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.1 μg/m3 (5) 36.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.5 μg/m3 (7) 37.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.7 μg/m3 (8) 37.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 2.1 μg/m3 (9) 38.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.4 μg/m3 (6) 38.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.0 μg/m3 (5) 39.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 0.9 μg/m3 (4) 39.0
 
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 0.9 μg/m3 (4) 39.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 0.7 μg/m3 (3) 41.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 0.6 μg/m3 (3) 38.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 0.9 μg/m3 (4) 28.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 1.1 μg/m3 (5) 32.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 1.2 μg/m3 (5) 34.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.7 μg/m3 (8) 39.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.6 μg/m3 (7) 36.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.0 μg/m3 (5) 36.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 1.6 μg/m3 (7) 34.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 1.5 μg/m3 (7) 32.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 0.3 μg/m3 (2) 37.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.5 μg/m3 (3) 38.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 0.5 μg/m3 (3) 35.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 0.4 μg/m3 (2) 34.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 0.5 μg/m3 (3) 33.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.1 μg/m3 (9) 26.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.6 μg/m3 (11) 19.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 1.9 μg/m3 (8) 20.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 4.9 μg/m3 (21) 21.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.7 μg/m3 (24) 24.0
 
April 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 10.9 μg/m3 (46) 46.0
 
April 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.6 μg/m3 (20) 30.0
 
April 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.2 μg/m3 (18) 34.0
 
April 7, 2021, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.1 μg/m3 (18) 36.0
 
April 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.9 μg/m3 (17) 37.0
 
April 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.3 μg/m3 (14) 38.0
 
April 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.3 μg/m3 (18) 36.0
 
April 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.6 μg/m3 (20) 35.0
 
April 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.6 μg/m3 (24) 32.0
 
April 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.7 μg/m3 (24) 27.0
 
April 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 6.3 μg/m3 (27) 27.0
 
April 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A 9.2 μg/m3 (39) 39.0
 
April 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 7.4 μg/m3 (31) 31.0
 
April 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 6.2 μg/m3 (26) 26.0
 
April 6, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 6.2 μg/m3 (26) 26.0
 
April 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 4.2 μg/m3 (18) 18.0
 
April 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 8.2 μg/m3 (35) 35.0
 
April 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 9.5 μg/m3 (40) 40.0
 
April 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.6 μg/m3 (24) 24.0
 
April 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 1.7 μg/m3 (8) 25.0
 
April 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.3 μg/m3 (10) 23.0
 
April 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.4 μg/m3 (10) 30.0
 
April 6, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.3 μg/m3 (10) 33.0
 
April 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
April 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.7 μg/m3 (12) 34.0
 
April 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.2 μg/m3 (14) 34.0
 
April 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.6 μg/m3 (16) 32.0
 
April 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 4.2 μg/m3 (18) 29.0
 
April 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 4.1 μg/m3 (18) 27.0
 
April 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 6.6 μg/m3 (28) 28.0
 
April 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 5.4 μg/m3 (23) 23.0
 
April 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.1 μg/m3 (13) 13.0
 
April 5, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.5 μg/m3 (15) 15.0
 
April 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.0 μg/m3 (13) 13.0
 
April 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.4 μg/m3 (15) 15.0
 
April 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 4.2 μg/m3 (18) 18.0
 
April 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 3.5 μg/m3 (15) 15.0
 
April 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.1 μg/m3 (9) 19.0
 
April 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 2.4 μg/m3 (10) 22.0
 
April 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.8 μg/m3 (8) 31.0
 
April 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 1.7 μg/m3 (8) 35.0
 
April 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.6 μg/m3 (7) 36.0
 
April 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.0 μg/m3 (9) 35.0
 
April 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.5 μg/m3 (7) 37.0
 
April 5, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.4 μg/m3 (6) 37.0
 
April 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.5 μg/m3 (7) 37.0
 
April 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.8 μg/m3 (8) 37.0
 
April 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.9 μg/m3 (8) 37.0
 
April 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.3 μg/m3 (6) 38.0
 
April 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.1 μg/m3 (5) 39.0
 
April 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.1 μg/m3 (5) 40.0
 
April 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 0.8 μg/m3 (4) 41.0
 
April 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.3 μg/m3 (6) 38.0
 
April 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.7 μg/m3 (8) 37.0
 
April 4, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.8 μg/m3 (8) 36.0
 
April 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.9 μg/m3 (8) 37.0
 
April 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.3 μg/m3 (10) 37.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.4 μg/m3 (10) 37.0
 
April 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 2.2 μg/m3 (10) 38.0
 
April 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.1 μg/m3 (9) 35.0
 
April 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.8 μg/m3 (8) 31.0
 
April 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 0.8 μg/m3 (4) 33.0
 
April 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 1.4 μg/m3 (6) 29.0
 
April 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 7.4 μg/m3 (31) 31.0