ID: 1295

AQSQID: 000090222

Site Name: Calgary Northwest

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

Updated: July 25, 2021, 4:52 a.m.

Location: Calgary (Varsity Acres), CC

Reporting: True, Located: True

Current AQI: 93.0

Calgary (Varsity Acres) CC, CA: 51.0814, -114.1403

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 25, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 53.0 ppb (50) 0.38 ppb (5) N/A 40.7 μg/m3 (114) 114.0
 
July 25, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.35 ppb (4) N/A 31.6 μg/m3 (93) 93.0
 
July 25, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.36 ppb (5) N/A 45.5 μg/m3 (126) 126.0
 
July 25, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) 0.35 ppb (4) N/A 45.2 μg/m3 (125) 125.0
 
July 24, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.34 ppb (4) N/A 40.5 μg/m3 (114) 114.0
 
July 24, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 55.0 ppb (51) 0.33 ppb (4) N/A 34.3 μg/m3 (98) 98.0
 
July 24, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) 0.33 ppb (4) N/A 32.8 μg/m3 (95) 95.0
 
July 24, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) 0.35 ppb (4) N/A 35.5 μg/m3 (101) 101.0
 
July 24, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 56.0 ppb (55) 0.37 ppb (5) N/A 37.5 μg/m3 (106) 106.0
 
July 24, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.37 ppb (5) N/A 34.4 μg/m3 (98) 98.0
 
July 24, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 45.0 ppb (42) 0.36 ppb (5) N/A 27.9 μg/m3 (85) 85.0
 
July 24, 2021, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 36.0 ppb (34) 0.4 ppb (5) N/A 29.9 μg/m3 (89) 89.0
 
July 24, 2021, 3 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 26.0 ppb (25) 0.46 ppb (6) N/A 37.3 μg/m3 (106) 106.0
 
July 24, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 23.0 ppb (22) 0.45 ppb (6) N/A 38.5 μg/m3 (109) 109.0
 
July 24, 2021, 1 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 19.0 ppb (18) 0.44 ppb (5) N/A 39.6 μg/m3 (112) 112.0
 
July 24, 2021, noon N/A N/A N/A 17.0 ppb (17) N/A N/A 13.0 ppb (13) 0.45 ppb (6) N/A 42.4 μg/m3 (118) 118.0
 
July 24, 2021, 11 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 20.0 ppb (19) 0.44 ppb (5) N/A 42.6 μg/m3 (119) 119.0
 
July 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 43.2 μg/m3 (120) 120.0
 
July 24, 2021, 9 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 29.0 ppb (27) 0.42 ppb (5) N/A 43.8 μg/m3 (122) 122.0
 
July 24, 2021, 8 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) 0.4 ppb (5) N/A 40.8 μg/m3 (115) 115.0
 
July 24, 2021, 7 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.39 ppb (5) N/A 38.7 μg/m3 (109) 109.0
 
July 24, 2021, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.4 ppb (5) N/A 40.2 μg/m3 (113) 113.0
 
July 24, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.42 ppb (5) N/A 45.7 μg/m3 (127) 127.0
 
July 24, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 36.0 ppb (34) 0.45 ppb (6) N/A 50.8 μg/m3 (139) 139.0
 
July 24, 2021, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.42 ppb (5) N/A 51.2 μg/m3 (140) 140.0
 
July 24, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.3 ppb (4) N/A 23.8 μg/m3 (76) 76.0
 
July 24, 2021, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.27 ppb (4) N/A 18.8 μg/m3 (66) 66.0
 
July 24, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.25 ppb (3) N/A 13.4 μg/m3 (54) 54.0
 
July 23, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) 0.24 ppb (3) N/A 13.7 μg/m3 (55) 55.0
 
July 23, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.24 ppb (3) N/A 11.7 μg/m3 (49) 49.0
 
July 23, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) 0.27 ppb (4) N/A 19.1 μg/m3 (66) 66.0
 
July 23, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) 0.26 ppb (4) N/A 19.9 μg/m3 (68) 68.0
 
July 23, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) 0.31 ppb (4) N/A 35.0 μg/m3 (100) 100.0
 
July 23, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.39 ppb (5) N/A 54.0 μg/m3 (147) 147.0
 
July 23, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 50.0 ppb (47) 0.47 ppb (6) N/A 73.7 μg/m3 (161) 161.0
 
July 23, 2021, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 48.0 ppb (45) 0.53 ppb (6) N/A 86.5 μg/m3 (168) 168.0
 
July 23, 2021, 3 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 39.0 ppb (37) 0.55 ppb (7) N/A 84.3 μg/m3 (166) 166.0
 
July 23, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.47 ppb (6) N/A 38.7 μg/m3 (109) 109.0
 
July 23, 2021, 1 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 22.0 ppb (21) 0.44 ppb (5) N/A 31.1 μg/m3 (91) 91.0
 
July 23, 2021, noon N/A N/A N/A 10.0 ppb (10) N/A N/A 19.0 ppb (18) 0.43 ppb (5) N/A 26.0 μg/m3 (81) 81.0
 
July 23, 2021, 11 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 26.0 ppb (25) 0.41 ppb (5) N/A 25.9 μg/m3 (81) 81.0
 
July 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 27.5 μg/m3 (84) 84.0
 
July 23, 2021, 9 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) 0.45 ppb (6) N/A 27.8 μg/m3 (85) 85.0
 
July 23, 2021, 8 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 17.0 ppb (16) 0.45 ppb (6) N/A 28.2 μg/m3 (85) 85.0
 
July 23, 2021, 7 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 20.0 ppb (19) 0.46 ppb (6) N/A 27.2 μg/m3 (83) 83.0
 
July 23, 2021, 5 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 24.0 ppb (23) 0.46 ppb (6) N/A 26.0 μg/m3 (81) 81.0
 
July 23, 2021, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 32.0 ppb (30) 0.41 ppb (5) N/A 25.4 μg/m3 (79) 79.0
 
July 23, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.39 ppb (5) N/A 25.9 μg/m3 (81) 81.0
 
July 23, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.39 ppb (5) N/A 26.4 μg/m3 (82) 82.0
 
July 23, 2021, 1 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 40.0 ppb (38) 0.39 ppb (5) N/A 27.4 μg/m3 (84) 84.0
 
July 23, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.32 ppb (4) N/A 28.0 μg/m3 (85) 85.0
 
July 22, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.33 ppb (4) N/A 32.0 μg/m3 (93) 93.0
 
July 22, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.32 ppb (4) N/A 31.5 μg/m3 (92) 92.0
 
July 22, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.26 ppb (4) N/A 20.1 μg/m3 (68) 68.0
 
July 22, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) 0.28 ppb (4) N/A 15.3 μg/m3 (58) 58.0
 
July 22, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.35 ppb (4) N/A 19.6 μg/m3 (67) 67.0
 
July 22, 2021, 6 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 54.0 ppb (50) 0.44 ppb (5) N/A 30.5 μg/m3 (90) 90.0
 
July 22, 2021, 5 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 48.0 ppb (45) 0.48 ppb (6) N/A 33.5 μg/m3 (97) 97.0
 
July 22, 2021, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 44.0 ppb (41) 0.45 ppb (6) N/A 30.3 μg/m3 (90) 90.0
 
July 22, 2021, 3 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.42 ppb (5) N/A 25.1 μg/m3 (79) 79.0
 
July 22, 2021, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.42 ppb (5) N/A 19.2 μg/m3 (66) 66.0
 
July 22, 2021, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.41 ppb (5) N/A 18.5 μg/m3 (65) 65.0
 
July 22, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.41 ppb (5) N/A 23.5 μg/m3 (75) 75.0
 
July 22, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.46 ppb (6) N/A 38.9 μg/m3 (110) 110.0
 
July 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 68.0 μg/m3 (158) 158.0
 
July 22, 2021, 9 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 29.0 ppb (27) 0.39 ppb (5) N/A 35.6 μg/m3 (102) 102.0
 
July 22, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 36.0 ppb (34) 0.36 ppb (5) N/A 31.9 μg/m3 (93) 93.0
 
July 22, 2021, 7 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.33 ppb (4) N/A 23.1 μg/m3 (75) 75.0
 
July 22, 2021, 6 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 39.0 ppb (37) 0.3 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
July 22, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 22, 2021, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 43.0
 
July 22, 2021, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) 0.26 ppb (4) N/A 10.6 μg/m3 (45) 45.0
 
July 22, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 49.0 ppb (46) 0.26 ppb (4) N/A 10.3 μg/m3 (43) 46.0
 
July 22, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 50.0 ppb (47) 0.26 ppb (4) N/A 8.8 μg/m3 (37) 47.0
 
July 22, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 50.0 ppb (47) 0.25 ppb (3) N/A 6.5 μg/m3 (28) 47.0
 
July 21, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.23 ppb (3) N/A 5.8 μg/m3 (25) 48.0
 
July 21, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.23 ppb (3) N/A 5.8 μg/m3 (25) 49.0
 
July 21, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.33 ppb (4) N/A 11.2 μg/m3 (47) 47.0
 
July 21, 2021, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.4 ppb (5) N/A 18.4 μg/m3 (65) 65.0
 
July 21, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) 0.43 ppb (5) N/A 19.9 μg/m3 (68) 68.0
 
July 21, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.44 ppb (5) N/A 21.1 μg/m3 (70) 70.0
 
July 21, 2021, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.45 ppb (6) N/A 20.8 μg/m3 (70) 70.0
 
July 21, 2021, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.44 ppb (5) N/A 20.3 μg/m3 (69) 69.0
 
July 21, 2021, 3 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 29.0 ppb (27) 0.46 ppb (6) N/A 20.6 μg/m3 (69) 69.0
 
July 21, 2021, 2 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) 0.51 ppb (6) N/A 22.9 μg/m3 (74) 74.0
 
July 21, 2021, 1 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) 0.46 ppb (6) N/A 22.7 μg/m3 (74) 74.0
 
July 21, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 0.45 ppb (6) N/A 22.0 μg/m3 (72) 72.0
 
July 21, 2021, 11 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.44 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
July 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 19.2 μg/m3 (66) 66.0
 
July 21, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 26.0 ppb (25) 0.43 ppb (5) N/A 19.0 μg/m3 (66) 66.0
 
July 21, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 23.0 ppb (22) 0.43 ppb (5) N/A 18.4 μg/m3 (65) 65.0
 
July 21, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 24.0 ppb (23) 0.45 ppb (6) N/A 20.6 μg/m3 (69) 69.0
 
July 21, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 25.0 ppb (24) 0.47 ppb (6) N/A 22.5 μg/m3 (73) 73.0
 
July 21, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.48 ppb (6) N/A 22.3 μg/m3 (73) 73.0
 
July 21, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 25.0 ppb (24) 0.46 ppb (6) N/A 19.2 μg/m3 (66) 66.0
 
July 21, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) 0.49 ppb (6) N/A 19.8 μg/m3 (68) 68.0
 
July 21, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) 0.48 ppb (6) N/A 17.8 μg/m3 (63) 63.0
 
July 21, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.51 ppb (6) N/A 20.7 μg/m3 (70) 70.0
 
July 21, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) 0.53 ppb (6) N/A 23.5 μg/m3 (75) 75.0
 
July 20, 2021, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 40.0 ppb (38) 0.54 ppb (6) N/A 24.3 μg/m3 (77) 77.0
 
July 20, 2021, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 40.0 ppb (38) 0.56 ppb (7) N/A 29.2 μg/m3 (87) 87.0
 
July 20, 2021, 9 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.56 ppb (7) N/A 30.8 μg/m3 (91) 91.0
 
July 20, 2021, 8 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) 0.58 ppb (7) N/A 31.2 μg/m3 (92) 92.0
 
July 20, 2021, 7 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 18.0 ppb (17) 0.57 ppb (7) N/A 25.3 μg/m3 (79) 79.0
 
July 20, 2021, 6 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 15.0 ppb (14) 0.53 ppb (6) N/A 20.6 μg/m3 (69) 69.0
 
July 20, 2021, 5 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 14.0 ppb (13) 0.51 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
July 20, 2021, 4 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 12.0 ppb (12) 0.51 ppb (6) N/A 16.1 μg/m3 (60) 60.0
 
July 20, 2021, 3 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 10.0 ppb (10) 0.48 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
July 20, 2021, 2 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 11.0 ppb (11) 0.46 ppb (6) N/A 13.9 μg/m3 (55) 55.0
 
July 20, 2021, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 10.0 ppb (10) 0.43 ppb (5) N/A 10.8 μg/m3 (46) 46.0
 
July 20, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 12.0 ppb (12) 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
July 20, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 14.0 ppb (13) 0.41 ppb (5) N/A 13.5 μg/m3 (54) 54.0
 
July 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.2 μg/m3 (58) 58.0
 
July 20, 2021, 9 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 15.0 ppb (14) 0.38 ppb (5) N/A 10.8 μg/m3 (46) 46.0
 
July 20, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 20.0 ppb (19) 0.38 ppb (5) N/A 13.6 μg/m3 (55) 55.0
 
July 20, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 21.0 ppb (20) 0.38 ppb (5) N/A 19.7 μg/m3 (67) 67.0
 
July 20, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 19.0 ppb (18) 0.41 ppb (5) N/A 24.4 μg/m3 (77) 77.0
 
July 20, 2021, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 21.0 ppb (20) 0.44 ppb (5) N/A 25.1 μg/m3 (79) 79.0
 
July 20, 2021, 4 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 22.0 ppb (21) 0.44 ppb (5) N/A 24.1 μg/m3 (77) 77.0
 
July 20, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 28.0 ppb (26) 0.43 ppb (5) N/A 20.5 μg/m3 (69) 69.0
 
July 20, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.43 ppb (5) N/A 20.7 μg/m3 (70) 70.0
 
July 20, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.46 ppb (6) N/A 23.3 μg/m3 (75) 75.0
 
July 20, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 45.0 ppb (42) 0.58 ppb (7) N/A 35.0 μg/m3 (100) 100.0
 
July 19, 2021, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.71 ppb (8) N/A 51.1 μg/m3 (140) 140.0
 
July 19, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.79 ppb (10) N/A 61.5 μg/m3 (155) 155.0
 
July 19, 2021, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 55.0 ppb (51) 0.82 ppb (10) N/A 71.7 μg/m3 (160) 160.0
 
July 19, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.84 ppb (10) N/A 76.0 μg/m3 (162) 162.0
 
July 19, 2021, 7 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 60.0 ppb (68) 0.93 ppb (11) N/A 90.6 μg/m3 (170) 170.0
 
July 19, 2021, 6 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 50.0 ppb (47) 1.05 ppb (13) N/A 103.0 μg/m3 (176) 176.0
 
July 19, 2021, 5 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 39.0 ppb (37) 1.1 ppb (13) N/A 99.1 μg/m3 (174) 174.0
 
July 19, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 35.0 ppb (33) 1.09 ppb (13) N/A 91.9 μg/m3 (170) 170.0
 
July 19, 2021, 3 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 30.0 ppb (28) 1.09 ppb (13) N/A 88.7 μg/m3 (169) 169.0
 
July 19, 2021, 2 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 27.0 ppb (25) 1.1 ppb (13) N/A 91.9 μg/m3 (170) 170.0
 
July 19, 2021, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 1.07 ppb (13) N/A 90.7 μg/m3 (170) 170.0
 
July 19, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 1.07 ppb (13) N/A 95.7 μg/m3 (172) 172.0
 
July 19, 2021, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 27.0 ppb (25) 1.07 ppb (13) N/A 106.9 μg/m3 (178) 178.0
 
July 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 113.3 μg/m3 (181) 181.0
 
July 19, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 1.1 ppb (13) N/A 113.5 μg/m3 (181) 181.0
 
July 19, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 1.12 ppb (13) N/A 110.9 μg/m3 (180) 180.0
 
July 19, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 1.14 ppb (13) N/A 104.4 μg/m3 (177) 177.0
 
July 19, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 1.16 ppb (14) N/A 101.0 μg/m3 (175) 175.0
 
July 19, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 1.14 ppb (13) N/A 98.0 μg/m3 (173) 173.0
 
July 19, 2021, 4 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 44.0 ppb (41) 1.04 ppb (12) N/A 89.8 μg/m3 (169) 169.0
 
July 19, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 45.0 ppb (42) 1.06 ppb (13) N/A 91.5 μg/m3 (170) 170.0
 
July 19, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) 1.09 ppb (13) N/A 99.6 μg/m3 (174) 174.0
 
July 19, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 45.0 ppb (42) 1.12 ppb (13) N/A 105.4 μg/m3 (177) 177.0
 
July 19, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 52.0 ppb (49) 1.16 ppb (14) N/A 117.7 μg/m3 (184) 184.0
 
July 18, 2021, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 53.0 ppb (50) 1.15 ppb (13) N/A 116.8 μg/m3 (183) 183.0
 
July 18, 2021, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 51.0 ppb (48) 1.15 ppb (13) N/A 118.3 μg/m3 (184) 184.0
 
July 18, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 48.0 ppb (45) 1.15 ppb (13) N/A 119.7 μg/m3 (185) 185.0
 
July 18, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) 1.22 ppb (14) N/A 140.9 μg/m3 (196) 196.0
 
July 18, 2021, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 1.44 ppb (16) N/A 182.8 μg/m3 (234) 234.0
 
July 18, 2021, 6 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 1.53 ppb (18) N/A N/A 31.0
 
July 18, 2021, 5 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 29.0 ppb (27) 1.38 ppb (16) N/A 193.7 μg/m3 (244) 244.0
 
July 18, 2021, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 30.0 ppb (28) 1.3 ppb (15) N/A 178.0 μg/m3 (229) 229.0
 
July 18, 2021, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) 1.26 ppb (15) N/A 162.8 μg/m3 (214) 214.0
 
July 18, 2021, 2 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 30.0 ppb (28) 1.19 ppb (14) N/A 164.1 μg/m3 (215) 215.0
 
July 18, 2021, 1 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) 1.11 ppb (13) N/A 162.9 μg/m3 (214) 214.0
 
July 18, 2021, noon N/A N/A N/A 5.0 ppb (5) N/A N/A 33.0 ppb (31) 1.03 ppb (12) N/A 171.2 μg/m3 (222) 222.0
 
July 18, 2021, 11 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 32.0 ppb (30) 0.94 ppb (11) N/A 163.3 μg/m3 (214) 214.0
 
July 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 158.7 μg/m3 (210) 210.0
 
July 18, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.8 ppb (10) N/A 147.8 μg/m3 (199) 199.0
 
July 18, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.69 ppb (8) N/A 116.4 μg/m3 (183) 183.0
 
July 18, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.61 ppb (7) N/A 83.9 μg/m3 (166) 166.0
 
July 18, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.57 ppb (7) N/A 71.6 μg/m3 (160) 160.0
 
July 18, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.55 ppb (7) N/A 69.6 μg/m3 (159) 159.0
 
July 18, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.55 ppb (7) N/A 69.5 μg/m3 (159) 159.0
 
July 18, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.5 ppb (6) N/A 54.2 μg/m3 (148) 148.0