ID: 2076

AQSQID: 000091701

Site Name: Steeper

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

Updated: July 30, 2021, 6:53 a.m.

Location: Alberta (Yellowhead Co), CC

Reporting: True, Located: True

Current AQI: 85.0

Alberta (Yellowhead Co) CC, CA: 53.1325, -117.09111

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 30, 2021, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 27.9 μg/m3 (85) 85.0
 
July 30, 2021, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 27.5 μg/m3 (84) 84.0
 
July 30, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 26.1 μg/m3 (81) 81.0
 
July 30, 2021, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 49.0 ppb (46) N/A N/A 30.0 μg/m3 (89) 89.0
 
July 30, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 51.0 ppb (48) N/A N/A 35.0 μg/m3 (100) 100.0
 
July 29, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 51.0 ppb (48) N/A N/A 35.3 μg/m3 (100) 100.0
 
July 29, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 31.2 μg/m3 (92) 92.0
 
July 29, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 27.7 μg/m3 (84) 84.0
 
July 29, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 23.2 μg/m3 (75) 75.0
 
July 29, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 22.4 μg/m3 (73) 73.0
 
July 29, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 19.5 μg/m3 (67) 67.0
 
July 29, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 17.1 μg/m3 (62) 62.0
 
July 29, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 22.0 μg/m3 (72) 72.0
 
July 29, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 46.3 μg/m3 (128) 128.0
 
July 29, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 59.8 μg/m3 (154) 154.0
 
July 29, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 74.6 μg/m3 (161) 161.0
 
July 29, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 85.7 μg/m3 (167) 167.0
 
July 29, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 85.7 μg/m3 (167) 167.0
 
July 29, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 81.8 μg/m3 (165) 165.0
 
July 29, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 87.9 μg/m3 (168) 168.0
 
July 29, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 78.6 μg/m3 (163) 163.0
 
July 29, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 67.9 μg/m3 (158) 158.0
 
July 29, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 60.2 μg/m3 (154) 154.0
 
July 29, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 31.9 μg/m3 (93) 93.0
 
July 29, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 25.4 μg/m3 (79) 79.0
 
July 29, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 23.2 μg/m3 (75) 75.0
 
July 29, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 21.9 μg/m3 (72) 72.0
 
July 29, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 20.6 μg/m3 (69) 69.0
 
July 29, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 17.3 μg/m3 (62) 62.0
 
July 28, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 15.6 μg/m3 (59) 59.0
 
July 28, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 13.5 μg/m3 (54) 54.0
 
July 28, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 13.8 μg/m3 (55) 55.0
 
July 28, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 28, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 11.8 μg/m3 (50) 50.0
 
July 28, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 28, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 10.9 μg/m3 (46) 46.0
 
July 28, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 11.2 μg/m3 (47) 47.0
 
July 28, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 11.8 μg/m3 (50) 50.0
 
July 28, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 11.8 μg/m3 (50) 50.0
 
July 28, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 12.0 μg/m3 (50) 50.0
 
July 28, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 12.3 μg/m3 (52) 52.0
 
July 28, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 12.3 μg/m3 (52) 52.0
 
July 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.3 μg/m3 (52) 52.0
 
July 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.7 μg/m3 (63) 63.0
 
July 27, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 16.8 μg/m3 (61) 61.0
 
July 27, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 16.1 μg/m3 (60) 60.0
 
July 27, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 16.6 μg/m3 (61) 61.0
 
July 27, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 17.5 μg/m3 (63) 63.0
 
July 27, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 16.0 μg/m3 (60) 60.0
 
July 27, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 15.2 μg/m3 (58) 58.0
 
July 27, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 14.0 μg/m3 (55) 55.0
 
July 27, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 11.8 μg/m3 (50) 50.0
 
July 27, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 9.9 μg/m3 (42) 42.0
 
July 27, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 9.8 μg/m3 (41) 41.0
 
July 26, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 9.8 μg/m3 (41) 41.0
 
July 26, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 26, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 26, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 9.7 μg/m3 (41) 41.0
 
July 26, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 26, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 8.5 μg/m3 (36) 36.0
 
July 26, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 7.8 μg/m3 (33) 33.0
 
July 26, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 8.3 μg/m3 (35) 35.0
 
July 26, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 6.8 μg/m3 (29) 29.0
 
July 26, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 6.1 μg/m3 (26) 26.0
 
July 26, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 6.3 μg/m3 (27) 27.0
 
July 26, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 6.5 μg/m3 (28) 28.0
 
July 26, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 6.7 μg/m3 (28) 28.0
 
July 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.2 μg/m3 (31) 31.0
 
July 26, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 7.0 μg/m3 (30) 30.0
 
July 26, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 6.2 μg/m3 (26) 26.0
 
July 26, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 4.8 μg/m3 (20) 20.0
 
July 26, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 4.9 μg/m3 (21) 21.0
 
July 26, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 4.4 μg/m3 (19) 23.0
 
July 26, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 4.6 μg/m3 (20) 30.0
 
July 26, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 5.6 μg/m3 (24) 30.0
 
July 26, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 5.2 μg/m3 (22) 30.0
 
July 26, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 7.1 μg/m3 (30) 30.0
 
July 26, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 7.8 μg/m3 (33) 33.0
 
July 25, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 8.0 μg/m3 (34) 34.0
 
July 25, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 8.7 μg/m3 (37) 37.0
 
July 25, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 8.0 μg/m3 (34) 34.0
 
July 25, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 7.6 μg/m3 (32) 33.0
 
July 25, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 7.7 μg/m3 (33) 33.0
 
July 25, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 7.5 μg/m3 (32) 35.0
 
July 25, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 6.9 μg/m3 (29) 34.0
 
July 25, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 6.4 μg/m3 (27) 32.0
 
July 25, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.1 μg/m3 (22) 29.0
 
July 25, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 4.4 μg/m3 (19) 24.0
 
July 25, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
July 25, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 4.2 μg/m3 (18) 28.0
 
July 25, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 4.2 μg/m3 (18) 29.0
 
July 25, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 25, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 3.8 μg/m3 (16) 29.0
 
July 25, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 3.8 μg/m3 (16) 31.0
 
July 25, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 3.6 μg/m3 (16) 30.0
 
July 25, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 3.2 μg/m3 (14) 31.0
 
July 25, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 2.5 μg/m3 (11) 29.0
 
July 25, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
July 25, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 4.5 μg/m3 (19) 27.0
 
July 25, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.3 μg/m3 (23) 29.0
 
July 25, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 6.4 μg/m3 (27) 30.0
 
July 25, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 12.3 μg/m3 (52) 52.0
 
July 24, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 13.6 μg/m3 (55) 55.0
 
July 24, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 12.7 μg/m3 (53) 53.0
 
July 24, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 13.6 μg/m3 (55) 55.0
 
July 24, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 14.8 μg/m3 (57) 57.0
 
July 24, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 19.5 μg/m3 (67) 67.0
 
July 24, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 24.1 μg/m3 (77) 77.0
 
July 24, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 22.5 μg/m3 (73) 73.0
 
July 24, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 26.1 μg/m3 (81) 81.0
 
July 24, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 22.1 μg/m3 (73) 73.0
 
July 24, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 18.6 μg/m3 (65) 65.0
 
July 24, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A 19.0 μg/m3 (66) 66.0
 
July 24, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 14.2 μg/m3 (56) 56.0
 
July 24, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 12.5 μg/m3 (52) 52.0
 
July 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.2 μg/m3 (47) 47.0
 
July 24, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 10.3 μg/m3 (43) 43.0
 
July 24, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 9.7 μg/m3 (41) 41.0
 
July 24, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 8.9 μg/m3 (38) 38.0
 
July 24, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 10.0 μg/m3 (42) 42.0
 
July 24, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 24, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 24, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 10.4 μg/m3 (44) 44.0
 
July 24, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 24, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 24, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 23, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 13.8 μg/m3 (55) 55.0
 
July 23, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 15.3 μg/m3 (58) 58.0
 
July 23, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 16.1 μg/m3 (60) 60.0
 
July 23, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 16.3 μg/m3 (60) 60.0
 
July 23, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 17.6 μg/m3 (63) 63.0
 
July 23, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 16.5 μg/m3 (61) 61.0
 
July 23, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 17.8 μg/m3 (63) 63.0
 
July 23, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 22.3 μg/m3 (73) 73.0
 
July 23, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 25.1 μg/m3 (79) 79.0
 
July 23, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 23.8 μg/m3 (76) 76.0
 
July 23, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 19.7 μg/m3 (67) 67.0
 
July 23, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 14.4 μg/m3 (56) 56.0
 
July 23, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 7.0 μg/m3 (30) 32.0
 
July 23, 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
 
July 23, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 5.2 μg/m3 (22) 30.0
 
July 23, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 4.7 μg/m3 (20) 30.0
 
July 23, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 3.9 μg/m3 (17) 29.0
 
July 23, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 2.5 μg/m3 (11) 29.0
 
July 23, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 1.9 μg/m3 (8) 29.0
 
July 23, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 1.6 μg/m3 (7) 29.0
 
July 23, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 1.6 μg/m3 (7) 28.0
 
July 23, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.3 μg/m3 (6) 27.0
 
July 23, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
July 23, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 0.9 μg/m3 (4) 26.0
 
July 22, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
July 22, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
July 22, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
July 22, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.1 μg/m3 (5) 27.0
 
July 22, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.5 μg/m3 (7) 27.0
 
July 22, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 3.6 μg/m3 (16) 27.0
 
July 22, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 8.4 μg/m3 (36) 36.0
 
July 22, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 10.7 μg/m3 (45) 45.0
 
July 22, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 24.6 μg/m3 (78) 78.0
 
July 22, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 45.6 μg/m3 (126) 126.0
 
July 22, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 21.0 μg/m3 (70) 70.0
 
July 22, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 10.9 μg/m3 (46) 46.0
 
July 22, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 9.1 μg/m3 (38) 38.0
 
July 22, 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
 
July 22, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 22, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 9.7 μg/m3 (41) 41.0
 
July 22, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 13.4 μg/m3 (54) 54.0
 
July 22, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 15.2 μg/m3 (58) 58.0