ID: 1302

AQSQID: 000091301

Site Name: Tomahawk

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

Updated: May 12, 2021, 2:46 a.m.

Location: Alberta (Yellowhead Co), CC

Reporting: True, Located: True

Current AQI: 42.0

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
May 12, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 0.5 μg/m3 (3) 42.0
 
May 11, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 0.1 μg/m3 (1) 41.0
 
May 11, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 0.1 μg/m3 (1) 40.0
 
May 11, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 0.1 μg/m3 (1) 39.0
 
May 11, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
May 11, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 8.9 μg/m3 (38) 40.0
 
May 11, 2021, 6 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
 
May 11, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 0.2 μg/m3 (1) 34.0
 
May 11, 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
 
May 11, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 13.0 μg/m3 (53) 53.0
 
May 11, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 9.8 μg/m3 (41) 41.0
 
May 11, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A -0.1 μg/m3 (0) 20.0
 
May 11, 2021, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A -0.1 μg/m3 (0) 19.0
 
May 11, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 0.0 μg/m3 (0) 22.0
 
May 11, 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
May 11, 2021, 9 a.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 (1) 28.0
 
May 11, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 0.0 μg/m3 (0) 29.0
 
May 11, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 0.0 μg/m3 (0) 29.0
 
May 11, 2021, 6 a.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
 
May 11, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 8.6 μg/m3 (36) 36.0
 
May 11, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A N/A 44.0
 
May 11, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A N/A 78.0
 
May 11, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.1 μg/m3 (5) 38.0
 
May 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 1.2 μg/m3 (5) 40.0
 
May 11, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 12.1 μg/m3 (51) 51.0
 
May 10, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 18.4 μg/m3 (65) 65.0
 
May 10, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 5.1 μg/m3 (22) 44.0
 
May 10, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 7.5 μg/m3 (32) 44.0
 
May 10, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 23.3 μg/m3 (75) 75.0
 
May 10, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 22.9 μg/m3 (74) 74.0
 
May 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 4.5 μg/m3 (19) 41.0
 
May 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.3 μg/m3 (14) 31.0
 
May 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.1 μg/m3 (22) 27.0
 
May 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 6.6 μg/m3 (28) 28.0
 
May 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 8.1 μg/m3 (34) 34.0
 
May 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 8.5 μg/m3 (36) 36.0
 
May 10, 2021, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 10.3 μg/m3 (43) 43.0
 
May 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.6 μg/m3 (45) 45.0
 
May 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 10.7 μg/m3 (45) 45.0
 
May 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 11.4 μg/m3 (48) 48.0
 
May 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 8.4 μg/m3 (36) 36.0
 
May 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 7.9 μg/m3 (33) 34.0
 
May 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 7.5 μg/m3 (32) 36.0
 
May 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.8 μg/m3 (25) 38.0
 
May 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 3.9 μg/m3 (17) 39.0
 
May 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.9 μg/m3 (13) 41.0
 
May 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.4 μg/m3 (19) 43.0
 
May 10, 2021, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 5.4 μg/m3 (23) 44.0
 
May 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 6.3 μg/m3 (27) 43.0
 
May 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.4 μg/m3 (23) 41.0
 
May 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.4 μg/m3 (23) 40.0
 
May 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 5.8 μg/m3 (25) 42.0
 
May 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
May 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.8 μg/m3 (29) 41.0
 
May 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 6.1 μg/m3 (26) 40.0
 
May 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.6 μg/m3 (24) 38.0
 
May 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.6 μg/m3 (24) 37.0
 
May 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 5.1 μg/m3 (22) 25.0
 
May 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 5.0 μg/m3 (21) 21.0
 
May 9, 2021, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 4.1 μg/m3 (18) 20.0
 
May 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
May 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.3 μg/m3 (18) 18.0
 
May 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.8 μg/m3 (16) 25.0
 
May 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
May 9, 2021, 7 a.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
 
May 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 0.0 μg/m3 (0) 23.0
 
May 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 1.1 μg/m3 (5) 24.0
 
May 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 0.3 μg/m3 (2) 25.0
 
May 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A -0.9 μg/m3 (0) 26.0
 
May 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A -0.8 μg/m3 (0) 26.0
 
May 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 0.1 μg/m3 (1) 27.0
 
May 9, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 0.3 μg/m3 (2) 27.0
 
May 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.5 μg/m3 (7) 26.0
 
May 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.8 μg/m3 (16) 27.0
 
May 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A -0.8 μg/m3 (0) 28.0
 
May 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 6.3 μg/m3 (27) 28.0
 
May 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A -1.6 μg/m3 (0) 29.0
 
May 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A -1.0 μg/m3 (0) 28.0
 
May 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 0.4 μg/m3 (2) 30.0
 
May 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 1.3 μg/m3 (6) 29.0
 
May 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 0.7 μg/m3 (3) 29.0
 
May 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A -0.3 μg/m3 (0) 25.0
 
May 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.3 μg/m3 (10) 30.0
 
May 8, 2021, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.0 μg/m3 (13) 30.0
 
May 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.8 μg/m3 (12) 32.0
 
May 8, 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
 
May 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
May 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.5 μg/m3 (7) 31.0
 
May 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 0.3 μg/m3 (2) 31.0
 
May 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.9 μg/m3 (17) 27.0
 
May 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.6 μg/m3 (28) 28.0
 
May 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.7 μg/m3 (24) 31.0
 
May 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.0 μg/m3 (21) 34.0
 
May 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.5 μg/m3 (19) 35.0
 
May 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 4.8 μg/m3 (20) 36.0
 
May 8, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 6.2 μg/m3 (26) 31.0
 
May 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 6.5 μg/m3 (28) 35.0
 
May 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 6.4 μg/m3 (27) 31.0
 
May 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 5.6 μg/m3 (24) 26.0
 
May 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 5.4 μg/m3 (23) 28.0
 
May 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 4.4 μg/m3 (19) 31.0
 
May 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 4.6 μg/m3 (20) 31.0
 
May 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.4 μg/m3 (23) 31.0
 
May 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 6.6 μg/m3 (28) 30.0
 
May 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 6.6 μg/m3 (28) 30.0
 
May 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 6.5 μg/m3 (28) 30.0
 
May 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.1 μg/m3 (22) 31.0
 
May 7, 2021, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.4 μg/m3 (23) 32.0
 
May 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 6.9 μg/m3 (29) 33.0
 
May 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 7, 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
 
May 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
May 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 2.2 μg/m3 (10) 40.0
 
May 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 2.2 μg/m3 (10) 42.0
 
May 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 3.6 μg/m3 (16) 41.0
 
May 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 3.6 μg/m3 (16) 42.0
 
May 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 5.4 μg/m3 (23) 45.0
 
May 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 7.0 μg/m3 (30) 46.0
 
May 7, 2021, 1 a.m. 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
 
May 7, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 9.9 μg/m3 (42) 49.0
 
May 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 9.5 μg/m3 (40) 50.0
 
May 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 10.8 μg/m3 (46) 49.0
 
May 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 12.3 μg/m3 (52) 52.0
 
May 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 11.9 μg/m3 (50) 50.0
 
May 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 5.8 μg/m3 (25) 47.0
 
May 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 5.4 μg/m3 (23) 45.0
 
May 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 3.8 μg/m3 (16) 44.0
 
May 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 2.5 μg/m3 (11) 43.0
 
May 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.3 μg/m3 (14) 40.0
 
May 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.8 μg/m3 (20) 36.0
 
May 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.0 μg/m3 (13) 30.0
 
May 6, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
May 6, 2021, 11 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
 
May 6, 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 (9) 9.0
 
May 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.1 μg/m3 (9) 33.0
 
May 6, 2021, 8 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
 
May 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.5 μg/m3 (7) 36.0
 
May 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 1.3 μg/m3 (6) 35.0
 
May 6, 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
 
May 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.7 μg/m3 (12) 37.0
 
May 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.0 μg/m3 (9) 36.0
 
May 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.9 μg/m3 (13) 39.0
 
May 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
May 6, 2021, midnight 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
 
May 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.7 μg/m3 (8) 39.0
 
May 5, 2021, 10 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
 
May 5, 2021, 9 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
 
May 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
May 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 0.4 μg/m3 (2) 37.0
 
May 5, 2021, 6 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 (0) 36.0
 
May 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A -1.5 μg/m3 (0) 35.0
 
May 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A -1.3 μg/m3 (0) 33.0
 
May 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A -1.4 μg/m3 (0) 32.0
 
May 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A -1.2 μg/m3 (0) 25.0
 
May 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 -0.6 μg/m3 (0) 21.0
 
May 5, 2021, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A -0.7 μg/m3 (0) 21.0
 
May 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A -1.2 μg/m3 (0) 23.0
 
May 5, 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 (4) 4.0
 
May 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A -1.2 μg/m3 (0) 27.0
 
May 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A -1.4 μg/m3 (0) 31.0
 
May 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A -1.5 μg/m3 (0) 36.0
 
May 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A -1.4 μg/m3 (0) 37.0
 
May 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A -1.4 μg/m3 (0) 34.0
 
May 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A -1.0 μg/m3 (0) 26.0
 
May 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A -0.8 μg/m3 (0) 28.0
 
May 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A -1.1 μg/m3 (0) 29.0
 
May 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A -0.7 μg/m3 (0) 33.0