ID: 1302

AQSQID: 000091301

Site Name: Tomahawk

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

Updated: April 11, 2021, 2:43 a.m.

Location: Alberta (Yellowhead Co), CC

Reporting: True, Located: True

Current AQI: 28.0

Alberta (Yellowhead Co) CC, CA: 53.37, -115.1906

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 11, 2021, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 0.5 μg/m3 (3) 28.0
 
April 10, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A -0.1 μg/m3 (0) 28.0
 
April 10, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A -0.4 μg/m3 (0) 29.0
 
April 10, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 0.4 μg/m3 (2) 35.0
 
April 10, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 0.2 μg/m3 (1) 37.0
 
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 0.2 μg/m3 (1) 40.0
 
April 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 0.5 μg/m3 (3) 43.0
 
April 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 0.6 μg/m3 (3) 42.0
 
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 0.6 μg/m3 (3) 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 0.8 μg/m3 (4) 38.0
 
April 10, 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 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
April 10, 2021, noon 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 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.2 μg/m3 (18) 35.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.2 μg/m3 (10) 10.0
 
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.5 μg/m3 (11) 37.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 2.9 μg/m3 (13) 38.0
 
April 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.7 μg/m3 (12) 40.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.3 μg/m3 (10) 40.0
 
April 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.4 μg/m3 (10) 39.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 3.1 μg/m3 (13) 41.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.2 μg/m3 (10) 43.0
 
April 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 1.7 μg/m3 (8) 44.0
 
April 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.7 μg/m3 (8) 45.0
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.9 μg/m3 (8) 46.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 3.6 μg/m3 (16) 47.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 3.7 μg/m3 (16) 48.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 3.9 μg/m3 (17) 47.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 3.7 μg/m3 (16) 47.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.0 μg/m3 (13) 46.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.5 μg/m3 (11) 45.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.6 μg/m3 (7) 41.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.3 μg/m3 (6) 37.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.1 μg/m3 (5) 31.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.3 μg/m3 (6) 26.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.4 μg/m3 (6) 26.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 1.4 μg/m3 (6) 27.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 1.5 μg/m3 (7) 27.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.7 μg/m3 (8) 8.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 1.9 μg/m3 (8) 29.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.1 μg/m3 (9) 32.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 1.9 μg/m3 (8) 32.0
 
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.0 μg/m3 (9) 31.0
 
April 9, 2021, 5 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
 
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 1.9 μg/m3 (8) 35.0
 
April 9, 2021, 3 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 9, 2021, 2 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 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 1.6 μg/m3 (7) 38.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.5 μg/m3 (7) 38.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.5 μg/m3 (7) 39.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.5 μg/m3 (7) 39.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.5 μg/m3 (7) 39.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 1.2 μg/m3 (5) 38.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 0.9 μg/m3 (4) 37.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 0.7 μg/m3 (3) 35.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 0.4 μg/m3 (2) 32.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 0.1 μg/m3 (1) 29.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 0.2 μg/m3 (1) 31.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 0.1 μg/m3 (1) 32.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A -0.3 μg/m3 (0) 34.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A -0.2 μg/m3 (0) 33.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A -0.7 μg/m3 (0) 34.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -0.8 μg/m3 (0) 0.0
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A -0.5 μg/m3 (0) 36.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 0.1 μg/m3 (1) 33.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 0.1 μg/m3 (1) 35.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 0.1 μg/m3 (1) 34.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 0.7 μg/m3 (3) 34.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 1.9 μg/m3 (8) 35.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.5 μg/m3 (11) 36.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 1.8 μg/m3 (8) 42.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.4 μg/m3 (23) 46.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.6 μg/m3 (24) 46.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.6 μg/m3 (28) 45.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 7.7 μg/m3 (33) 42.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 7.5 μg/m3 (32) 42.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.9 μg/m3 (29) 41.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 7.1 μg/m3 (30) 38.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.2 μg/m3 (26) 36.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.6 μg/m3 (28) 32.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 6.0 μg/m3 (25) 30.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 7.9 μg/m3 (33) 33.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 6.2 μg/m3 (26) 33.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.5 μg/m3 (28) 28.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 6.5 μg/m3 (28) 39.0
 
April 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.6 μg/m3 (28) 41.0
 
April 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 6.6 μg/m3 (28) 40.0
 
April 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.5 μg/m3 (28) 42.0
 
April 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 6.2 μg/m3 (26) 43.0
 
April 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.9 μg/m3 (25) 43.0
 
April 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 6.2 μg/m3 (26) 44.0
 
April 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 7.3 μg/m3 (31) 42.0
 
April 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 7.6 μg/m3 (32) 46.0
 
April 7, 2021, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 7.6 μg/m3 (32) 48.0
 
April 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 7.9 μg/m3 (33) 48.0
 
April 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 8.0 μg/m3 (34) 48.0
 
April 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 7.7 μg/m3 (33) 47.0
 
April 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 6.6 μg/m3 (28) 47.0
 
April 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 4.6 μg/m3 (20) 47.0
 
April 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 4.5 μg/m3 (19) 47.0
 
April 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.8 μg/m3 (16) 46.0
 
April 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.4 μg/m3 (15) 43.0
 
April 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 5.4 μg/m3 (23) 35.0
 
April 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 7.5 μg/m3 (32) 35.0
 
April 6, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.9 μg/m3 (29) 36.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 6.9 μg/m3 (29) 37.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
April 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 6.4 μg/m3 (27) 38.0
 
April 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 8.4 μg/m3 (36) 38.0
 
April 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 8.8 μg/m3 (37) 38.0
 
April 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.7 μg/m3 (33) 37.0
 
April 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 7.7 μg/m3 (33) 38.0
 
April 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.5 μg/m3 (32) 40.0
 
April 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.6 μg/m3 (28) 42.0
 
April 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 7.6 μg/m3 (32) 43.0
 
April 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 10.3 μg/m3 (43) 45.0
 
April 6, 2021, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 10.6 μg/m3 (45) 47.0
 
April 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 11.5 μg/m3 (48) 48.0
 
April 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 11.7 μg/m3 (49) 49.0
 
April 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 10.8 μg/m3 (46) 46.0
 
April 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 9.0 μg/m3 (38) 45.0
 
April 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.5 μg/m3 (23) 43.0
 
April 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 4.0 μg/m3 (17) 41.0
 
April 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.1 μg/m3 (13) 37.0
 
April 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 2.5 μg/m3 (11) 29.0
 
April 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 2.1 μg/m3 (9) 25.0
 
April 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.0 μg/m3 (9) 21.0
 
April 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.3 μg/m3 (10) 21.0
 
April 5, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.5 μg/m3 (11) 23.0
 
April 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 2.1 μg/m3 (9) 27.0
 
April 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.1 μg/m3 (13) 13.0
 
April 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.0 μg/m3 (13) 28.0
 
April 5, 2021, 8 a.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
 
April 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.6 μg/m3 (11) 30.0
 
April 5, 2021, 6 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
 
April 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.4 μg/m3 (10) 36.0
 
April 5, 2021, 4 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 5, 2021, 3 a.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 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.8 μg/m3 (8) 39.0
 
April 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.9 μg/m3 (8) 40.0
 
April 5, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.6 μg/m3 (11) 42.0
 
April 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.5 μg/m3 (11) 43.0
 
April 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.6 μg/m3 (11) 43.0
 
April 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.4 μg/m3 (10) 42.0
 
April 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.8 μg/m3 (12) 42.0
 
April 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.2 μg/m3 (10) 42.0
 
April 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.6 μg/m3 (7) 40.0
 
April 4, 2021, 5 p.m. 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 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 1.7 μg/m3 (8) 38.0
 
April 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.2 μg/m3 (10) 36.0
 
April 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.7 μg/m3 (24) 36.0
 
April 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.4 μg/m3 (27) 36.0
 
April 4, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
April 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 7.0 μg/m3 (30) 35.0
 
April 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 7.4 μg/m3 (31) 32.0
 
April 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 6.7 μg/m3 (28) 34.0
 
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 7.2 μg/m3 (31) 35.0
 
April 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 7.9 μg/m3 (33) 36.0
 
April 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 8.7 μg/m3 (37) 37.0
 
April 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 8.6 μg/m3 (36) 38.0
 
April 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.5 μg/m3 (23) 38.0
 
April 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.2 μg/m3 (22) 40.0
 
April 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0