ID: 1042

AQSQID: 000101301

Site Name: Langley

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

Updated: March 6, 2021, 4:32 p.m.

Location: Langley (237 St), CC

Reporting: True, Located: True

Current AQI: 31.0

Langley (237 St) CC, CA: 49.09556, -122.56694

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.4 μg/m3 (10) 31.0
 
March 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.5 μg/m3 (11) 32.0
 
March 6, 2021, 1 p.m. 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
 
March 6, 2021, noon 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
 
March 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 2.4 μg/m3 (10) 29.0
 
March 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.6 μg/m3 (11) 31.0
 
March 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.8 μg/m3 (12) 31.0
 
March 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.2 μg/m3 (10) 32.0
 
March 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.1 μg/m3 (9) 32.0
 
March 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.2 μg/m3 (10) 33.0
 
March 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 1.9 μg/m3 (8) 33.0
 
March 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.5 μg/m3 (11) 33.0
 
March 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.6 μg/m3 (11) 35.0
 
March 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.5 μg/m3 (11) 37.0
 
March 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.2 μg/m3 (10) 37.0
 
March 6, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 1.7 μg/m3 (8) 30.0
 
March 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 1.7 μg/m3 (8) 33.0
 
March 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
March 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
March 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.3 μg/m3 (10) 36.0
 
March 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
March 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.9 μg/m3 (13) 37.0
 
March 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 1.8 μg/m3 (8) 27.0
 
March 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
March 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
March 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 1.4 μg/m3 (6) 30.0
 
March 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.0 μg/m3 (5) 31.0
 
March 5, 2021, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 0.9 μg/m3 (4) 32.0
 
March 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 1.0 μg/m3 (5) 32.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
March 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 1.1 μg/m3 (5) 30.0
 
March 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 1.3 μg/m3 (6) 32.0
 
March 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 2.2 μg/m3 (10) 29.0
 
March 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 2.8 μg/m3 (12) 27.0
 
March 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.1 μg/m3 (9) 36.0
 
March 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
March 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 2.6 μg/m3 (11) 35.0
 
March 5, 2021, 1 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
 
March 5, 2021, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.2 μg/m3 (14) 36.0
 
March 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.9 μg/m3 (17) 36.0
 
March 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 35.0
 
March 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.3 μg/m3 (23) 33.0
 
March 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 6.5 μg/m3 (28) 28.0
 
March 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
March 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.1 μg/m3 (13) 25.0
 
March 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.2 μg/m3 (14) 25.0
 
March 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 3.0 μg/m3 (13) 25.0
 
March 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.9 μg/m3 (13) 26.0
 
March 4, 2021, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.8 μg/m3 (16) 26.0
 
March 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 4.5 μg/m3 (19) 22.0
 
March 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 7.0 μg/m3 (30) 30.0
 
March 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 9.4 μg/m3 (40) 40.0
 
March 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 10.2 μg/m3 (43) 43.0
 
March 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 8.4 μg/m3 (36) 36.0
 
March 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 8.2 μg/m3 (35) 35.0
 
March 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.4 μg/m3 (31) 31.0
 
March 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 6.9 μg/m3 (29) 29.0
 
March 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 4.8 μg/m3 (20) 20.0
 
March 4, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.8 μg/m3 (12) 33.0
 
March 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.7 μg/m3 (12) 36.0
 
March 3, 2021, 10 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
 
March 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 2.6 μg/m3 (11) 29.0
 
March 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 2.4 μg/m3 (10) 28.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 3.3 μg/m3 (14) 25.0
 
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.4 μg/m3 (10) 26.0
 
March 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.6 μg/m3 (11) 23.0
 
March 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.7 μg/m3 (12) 18.0
 
March 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 3.0 μg/m3 (13) 18.0
 
March 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.0 μg/m3 (13) 17.0
 
March 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.3 μg/m3 (14) 17.0
 
March 3, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 3.2 μg/m3 (14) 16.0
 
March 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.5 μg/m3 (15) 17.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 5.5 μg/m3 (23) 23.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 6.5 μg/m3 (28) 28.0
 
March 3, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 16.0 μg/m3 (60) 60.0
 
March 3, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 13.8 μg/m3 (55) 55.0
 
March 3, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 11.3 μg/m3 (48) 48.0
 
March 3, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 3, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 7.7 μg/m3 (33) 33.0
 
March 3, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 4.0 μg/m3 (17) 22.0
 
March 3, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.0 μg/m3 (13) 34.0
 
March 3, 2021, midnight 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
 
March 2, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.8 μg/m3 (8) 38.0
 
March 2, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.2 μg/m3 (10) 37.0
 
March 2, 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
 
March 2, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
March 2, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.2 μg/m3 (10) 33.0
 
March 2, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.6 μg/m3 (7) 31.0
 
March 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 1.5 μg/m3 (7) 28.0
 
March 2, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 2.7 μg/m3 (12) 14.0
 
March 2, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 15.9 μg/m3 (59) 59.0
 
March 2, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 3.9 μg/m3 (17) 17.0
 
March 2, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 3.9 μg/m3 (17) 17.0
 
March 2, 2021, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 3.4 μg/m3 (15) 15.0
 
March 2, 2021, 11 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
 
March 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.6 μg/m3 (11) 23.0
 
March 2, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.3 μg/m3 (14) 25.0
 
March 2, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 4.6 μg/m3 (20) 25.0
 
March 2, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 5.2 μg/m3 (22) 26.0
 
March 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 7.5 μg/m3 (32) 32.0
 
March 2, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 7.5 μg/m3 (32) 32.0
 
March 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 10.2 μg/m3 (43) 43.0
 
March 2, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 7.8 μg/m3 (33) 33.0
 
March 2, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 4.7 μg/m3 (20) 20.0
 
March 2, 2021, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 4.1 μg/m3 (18) 21.0
 
March 1, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 3.9 μg/m3 (17) 21.0
 
March 1, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 3.8 μg/m3 (16) 19.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.9 μg/m3 (13) 13.0
 
March 1, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
March 1, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
March 1, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 3.7 μg/m3 (16) 16.0
 
March 1, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 3.6 μg/m3 (16) 16.0
 
March 1, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A 3.9 μg/m3 (17) 17.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 4.0 μg/m3 (17) 17.0
 
March 1, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 3.5 μg/m3 (15) 15.0
 
March 1, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 3.0 μg/m3 (13) 13.0
 
March 1, 2021, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 2.7 μg/m3 (12) 14.0
 
March 1, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 2.8 μg/m3 (12) 17.0
 
March 1, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 3.0 μg/m3 (13) 16.0
 
March 1, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.5 μg/m3 (15) 17.0
 
March 1, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 4.2 μg/m3 (18) 18.0
 
March 1, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 14.6 μg/m3 (57) 57.0
 
March 1, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 6.4 μg/m3 (27) 27.0
 
March 1, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 1, 2021, midnight N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 4.5 μg/m3 (19) 23.0
 
Feb. 28, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 2.2 μg/m3 (10) 25.0
 
Feb. 28, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.7 μg/m3 (8) 26.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 1.4 μg/m3 (6) 25.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 1.4 μg/m3 (6) 25.0
 
Feb. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 1.6 μg/m3 (7) 23.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 1.6 μg/m3 (7) 23.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 1.8 μg/m3 (8) 23.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.6 μg/m3 (7) 22.0
 
Feb. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.1 μg/m3 (9) 21.0
 
Feb. 28, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 2.2 μg/m3 (10) 25.0
 
Feb. 28, 2021, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 2.2 μg/m3 (10) 27.0
 
Feb. 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.7 μg/m3 (12) 26.0
 
Feb. 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 4.3 μg/m3 (18) 26.0
 
Feb. 28, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.6 μg/m3 (16) 27.0
 
Feb. 28, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.1 μg/m3 (13) 30.0
 
Feb. 28, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 4.1 μg/m3 (18) 29.0
 
Feb. 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
Feb. 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 4.2 μg/m3 (18) 33.0
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.6 μg/m3 (24) 36.0
 
Feb. 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 9.7 μg/m3 (41) 41.0
 
Feb. 28, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
Feb. 28, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.3 μg/m3 (18) 35.0
 
Feb. 27, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 2.8 μg/m3 (12) 38.0
 
Feb. 27, 2021, 10 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
 
Feb. 27, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
Feb. 27, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.0 μg/m3 (13) 26.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.7 μg/m3 (16) 25.0
 
Feb. 27, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 3.9 μg/m3 (17) 24.0
 
Feb. 27, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.5 μg/m3 (11) 21.0
 
Feb. 27, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 3.3 μg/m3 (14) 14.0
 
Feb. 27, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 5.6 μg/m3 (24) 24.0