ID: 5408

AQSQID: 000090228

Site Name: Calgary Central2

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

Updated: July 30, 2021, 8 p.m.

Location: Calgary (Downtown), CC

Reporting: True, Located: True

Current AQI: 81.0

Calgary (Downtown) CC, CA: 51.047611, -114.075165

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 30, 2021, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 53.0 ppb (50) 0.23 ppb (3) N/A 26.1 μg/m3 (81) 81.0
 
July 30, 2021, 4 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 45.0 ppb (42) 0.3 ppb (4) N/A 30.8 μg/m3 (91) 91.0
 
July 30, 2021, 3 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 28.0 ppb (26) 0.37 ppb (5) N/A 36.6 μg/m3 (104) 104.0
 
July 30, 2021, 2 p.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 6.0 ppb (6) 0.43 ppb (5) N/A 38.9 μg/m3 (110) 110.0
 
July 30, 2021, 1 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 3.0 ppb (3) 0.44 ppb (5) N/A 32.7 μg/m3 (95) 95.0
 
July 30, 2021, noon N/A N/A N/A 23.0 ppb (22) N/A N/A 2.0 ppb (2) 0.32 ppb (4) N/A 30.7 μg/m3 (91) 91.0
 
July 30, 2021, 11 a.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 2.0 ppb (2) 0.32 ppb (4) N/A 30.9 μg/m3 (91) 91.0
 
July 30, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 30.1 μg/m3 (89) 89.0
 
July 30, 2021, 9 a.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 5.0 ppb (5) 0.34 ppb (4) N/A 30.8 μg/m3 (91) 91.0
 
July 30, 2021, 8 a.m. N/A N/A N/A 28.0 ppb (27) N/A N/A 3.0 ppb (3) 0.43 ppb (5) N/A 31.5 μg/m3 (92) 92.0
 
July 30, 2021, 7 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 9.0 ppb (9) 0.39 ppb (5) N/A 27.1 μg/m3 (83) 83.0
 
July 30, 2021, 6 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 15.0 ppb (14) 0.4 ppb (5) N/A 24.9 μg/m3 (78) 78.0
 
July 30, 2021, 5 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 19.0 ppb (18) 0.4 ppb (5) N/A 24.3 μg/m3 (77) 77.0
 
July 30, 2021, 4 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 38.0 ppb (36) 0.29 ppb (4) N/A 21.3 μg/m3 (71) 71.0
 
July 30, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 48.0 ppb (45) 0.27 ppb (4) N/A 22.3 μg/m3 (73) 73.0
 
July 30, 2021, 2 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 58.0 ppb (61) 0.27 ppb (4) N/A 27.8 μg/m3 (85) 85.0
 
July 30, 2021, 1 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 62.0 ppb (74) 0.33 ppb (4) N/A 39.5 μg/m3 (111) 111.0
 
July 30, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 60.0 ppb (68) 0.38 ppb (5) N/A 49.2 μg/m3 (135) 135.0
 
July 29, 2021, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 60.0 ppb (68) 0.44 ppb (5) N/A 61.4 μg/m3 (155) 155.0
 
July 29, 2021, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 58.0 ppb (61) 0.46 ppb (6) N/A 64.6 μg/m3 (156) 156.0
 
July 29, 2021, 9 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 58.0 ppb (61) 0.43 ppb (5) N/A 60.4 μg/m3 (154) 154.0
 
July 29, 2021, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 58.0 ppb (61) 0.42 ppb (5) N/A 59.8 μg/m3 (154) 154.0
 
July 29, 2021, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 57.0 ppb (58) 0.41 ppb (5) N/A 61.3 μg/m3 (154) 154.0
 
July 29, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 54.0 ppb (50) 0.39 ppb (5) N/A 59.8 μg/m3 (154) 154.0
 
July 29, 2021, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 50.0 ppb (47) 0.35 ppb (4) N/A 51.0 μg/m3 (140) 140.0
 
July 29, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 43.0 ppb (40) 0.34 ppb (4) N/A 46.6 μg/m3 (129) 129.0
 
July 29, 2021, 3 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 25.0 ppb (24) 0.47 ppb (6) N/A 63.4 μg/m3 (156) 156.0
 
July 29, 2021, 2 p.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 16.0 ppb (15) 0.44 ppb (5) N/A 60.5 μg/m3 (154) 154.0
 
July 29, 2021, 1 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 11.0 ppb (11) 0.36 ppb (5) N/A 47.4 μg/m3 (131) 131.0
 
July 29, 2021, noon N/A N/A N/A 15.0 ppb (15) N/A N/A 11.0 ppb (11) 0.32 ppb (4) N/A 42.9 μg/m3 (120) 120.0
 
July 29, 2021, 11 a.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 4.0 ppb (4) 0.39 ppb (5) N/A 34.1 μg/m3 (98) 98.0
 
July 29, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 30.0 μg/m3 (89) 89.0
 
July 29, 2021, 9 a.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 1.0 ppb (1) 0.44 ppb (5) N/A 30.9 μg/m3 (91) 91.0
 
July 29, 2021, 8 a.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 5.0 ppb (5) 0.35 ppb (4) N/A 31.8 μg/m3 (93) 93.0
 
July 29, 2021, 7 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 11.0 ppb (11) 0.3 ppb (4) N/A 29.9 μg/m3 (89) 89.0
 
July 29, 2021, 6 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 18.0 ppb (17) 0.29 ppb (4) N/A 29.6 μg/m3 (88) 88.0
 
July 29, 2021, 5 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 28.0 μg/m3 (85) 85.0
 
July 29, 2021, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 38.0 ppb (36) 0.26 ppb (4) N/A 29.7 μg/m3 (89) 89.0
 
July 29, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 44.0 ppb (41) 0.23 ppb (3) N/A 24.0 μg/m3 (77) 77.0
 
July 29, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 48.0 ppb (45) 0.21 ppb (3) N/A 22.3 μg/m3 (73) 73.0
 
July 29, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.18 ppb (3) N/A 22.5 μg/m3 (73) 73.0
 
July 29, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 53.0 ppb (50) 0.17 ppb (3) N/A 20.8 μg/m3 (70) 70.0
 
July 28, 2021, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 53.0 ppb (50) 0.16 ppb (3) N/A 19.8 μg/m3 (68) 68.0
 
July 28, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 53.0 ppb (50) 0.14 ppb (2) N/A 16.8 μg/m3 (61) 61.0
 
July 28, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.13 ppb (2) N/A 14.7 μg/m3 (57) 57.0
 
July 28, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 49.0 ppb (46) 0.13 ppb (2) N/A 16.1 μg/m3 (60) 60.0
 
July 28, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.12 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
July 28, 2021, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A 9.9 μg/m3 (42) 42.0
 
July 28, 2021, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
July 28, 2021, 4 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A 8.4 μg/m3 (36) 36.0
 
July 28, 2021, 3 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 26.0 ppb (25) 0.16 ppb (3) N/A 11.3 μg/m3 (48) 48.0
 
July 28, 2021, 2 p.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 8.0 ppb (8) 0.33 ppb (4) N/A 15.4 μg/m3 (58) 58.0
 
July 28, 2021, 1 p.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 2.0 ppb (2) 0.41 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
July 28, 2021, noon N/A N/A N/A 24.0 ppb (23) N/A N/A 2.0 ppb (2) 0.24 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
July 28, 2021, 11 a.m. N/A N/A N/A 25.0 ppb (24) N/A N/A 2.0 ppb (2) 0.2 ppb (3) N/A 10.5 μg/m3 (44) 44.0
 
July 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.4 μg/m3 (44) 44.0
 
July 28, 2021, 9 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 14.0 ppb (13) 0.15 ppb (2) N/A 9.5 μg/m3 (40) 40.0
 
July 28, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 28.0 ppb (26) 0.1 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
July 28, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.1 ppb (2) N/A 7.8 μg/m3 (33) 33.0
 
July 28, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 7.5 μg/m3 (32) 36.0
 
July 28, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A 7.6 μg/m3 (32) 39.0
 
July 28, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.12 ppb (2) N/A 8.2 μg/m3 (35) 38.0
 
July 28, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.13 ppb (2) N/A 9.2 μg/m3 (39) 39.0
 
July 28, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) 0.17 ppb (3) N/A 13.8 μg/m3 (55) 55.0
 
July 28, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.18 ppb (3) N/A 17.8 μg/m3 (63) 63.0
 
July 28, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.18 ppb (3) N/A 17.4 μg/m3 (63) 63.0
 
July 27, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.18 ppb (3) N/A 19.5 μg/m3 (67) 67.0
 
July 27, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.17 ppb (3) N/A 16.6 μg/m3 (61) 61.0
 
July 27, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.15 ppb (2) N/A 13.5 μg/m3 (54) 54.0
 
July 27, 2021, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.15 ppb (2) N/A 14.4 μg/m3 (56) 56.0
 
July 27, 2021, 3 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) 0.15 ppb (2) N/A 15.0 μg/m3 (58) 58.0
 
July 27, 2021, 2 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 27.0 ppb (25) 0.18 ppb (3) N/A 18.8 μg/m3 (66) 66.0
 
July 27, 2021, 1 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.19 ppb (3) N/A 23.6 μg/m3 (76) 76.0
 
July 27, 2021, noon N/A N/A N/A 27.0 ppb (26) N/A N/A 9.0 ppb (9) 0.27 ppb (4) N/A 26.4 μg/m3 (82) 82.0
 
July 27, 2021, 11 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 12.0 ppb (12) 0.21 ppb (3) N/A 24.3 μg/m3 (77) 77.0
 
July 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 24.1 μg/m3 (77) 77.0
 
July 27, 2021, 9 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 12.0 ppb (12) 0.25 ppb (3) N/A 24.2 μg/m3 (77) 77.0
 
July 27, 2021, 8 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 16.0 ppb (15) 0.27 ppb (4) N/A 24.7 μg/m3 (78) 78.0
 
July 27, 2021, 7 a.m. N/A N/A N/A 31.0 ppb (30) N/A N/A 4.0 ppb (4) 0.31 ppb (4) N/A 24.0 μg/m3 (77) 77.0
 
July 27, 2021, 6 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 20.0 ppb (19) 0.23 ppb (3) N/A 23.1 μg/m3 (75) 75.0
 
July 27, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) 0.2 ppb (3) N/A 23.1 μg/m3 (75) 75.0
 
July 27, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 40.0 ppb (38) 0.2 ppb (3) N/A 22.2 μg/m3 (73) 73.0
 
July 27, 2021, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 45.0 ppb (42) 0.19 ppb (3) N/A 20.6 μg/m3 (69) 69.0
 
July 27, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 49.0 ppb (46) 0.17 ppb (3) N/A 21.0 μg/m3 (70) 70.0
 
July 27, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 50.0 ppb (47) 0.17 ppb (3) N/A 22.4 μg/m3 (73) 73.0
 
July 27, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 50.0 ppb (47) 0.17 ppb (3) N/A 23.0 μg/m3 (74) 74.0
 
July 26, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.15 ppb (2) N/A 20.6 μg/m3 (69) 69.0
 
July 26, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 54.0 ppb (50) 0.15 ppb (2) N/A 18.6 μg/m3 (65) 65.0
 
July 26, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.14 ppb (2) N/A 16.6 μg/m3 (61) 61.0
 
July 26, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 48.0 ppb (45) 0.14 ppb (2) N/A 14.7 μg/m3 (57) 57.0
 
July 26, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 47.0 ppb (44) 0.13 ppb (2) N/A 13.1 μg/m3 (54) 54.0
 
July 26, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 46.0 ppb (43) 0.13 ppb (2) N/A 12.6 μg/m3 (53) 53.0
 
July 26, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.15 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
July 26, 2021, 4 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.13 ppb (2) N/A 10.1 μg/m3 (43) 43.0
 
July 26, 2021, 3 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 38.0 ppb (36) 0.14 ppb (2) N/A 9.5 μg/m3 (40) 40.0
 
July 26, 2021, 2 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 26.0 ppb (25) 0.19 ppb (3) N/A 9.2 μg/m3 (39) 39.0
 
July 26, 2021, 1 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 15.0 ppb (14) 0.19 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
July 26, 2021, noon N/A N/A N/A 14.0 ppb (14) N/A N/A 16.0 ppb (15) 0.15 ppb (2) N/A 8.8 μg/m3 (37) 37.0
 
July 26, 2021, 11 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 25.0 ppb (24) 0.12 ppb (2) N/A 7.8 μg/m3 (33) 33.0
 
July 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
July 26, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.1 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 26, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.1 ppb (2) N/A 7.4 μg/m3 (31) 35.0
 
July 26, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A 7.8 μg/m3 (33) 34.0
 
July 26, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 26, 2021, 5 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) 0.2 ppb (3) N/A 16.5 μg/m3 (61) 61.0
 
July 26, 2021, 4 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 29.4 μg/m3 (88) 88.0
 
July 26, 2021, 3 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 44.0 ppb (41) 0.33 ppb (4) N/A 32.0 μg/m3 (93) 93.0
 
July 26, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 51.0 ppb (48) 0.27 ppb (4) N/A 32.0 μg/m3 (93) 93.0
 
July 26, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 55.0 ppb (51) 0.24 ppb (3) N/A 30.9 μg/m3 (91) 91.0
 
July 26, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 56.0 ppb (55) 0.21 ppb (3) N/A 26.5 μg/m3 (82) 82.0
 
July 25, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 58.0 ppb (61) 0.19 ppb (3) N/A 23.8 μg/m3 (76) 76.0
 
July 25, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (3) N/A 21.8 μg/m3 (72) 72.0
 
July 25, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (3) N/A 18.3 μg/m3 (65) 65.0
 
July 25, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A 0.13 ppb (2) N/A 13.7 μg/m3 (55) 55.0
 
July 25, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A 0.11 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
July 25, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) 0.1 ppb (2) N/A N/A 42.0
 
July 25, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A 10.7 μg/m3 (45) 45.0
 
July 25, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) 0.13 ppb (2) N/A 14.1 μg/m3 (56) 56.0
 
July 25, 2021, 3 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 33.0 ppb (31) 0.17 ppb (3) N/A 19.9 μg/m3 (68) 68.0
 
July 25, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 23.0 ppb (22) 0.21 ppb (3) N/A 25.1 μg/m3 (79) 79.0
 
July 25, 2021, 1 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 13.0 ppb (13) 0.26 ppb (4) N/A 27.8 μg/m3 (85) 85.0
 
July 25, 2021, noon N/A N/A N/A 20.0 ppb (19) N/A N/A 7.0 ppb (7) 0.34 ppb (4) N/A 29.9 μg/m3 (89) 89.0
 
July 25, 2021, 11 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 12.0 ppb (12) 0.32 ppb (4) N/A 29.7 μg/m3 (89) 89.0
 
July 25, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 29.8 μg/m3 (89) 89.0
 
July 25, 2021, 9 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.24 ppb (3) N/A 27.5 μg/m3 (84) 84.0
 
July 25, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.21 ppb (3) N/A 26.2 μg/m3 (81) 81.0
 
July 25, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.21 ppb (3) N/A 25.9 μg/m3 (81) 81.0
 
July 25, 2021, 6 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.27 ppb (4) N/A 34.4 μg/m3 (98) 98.0
 
July 25, 2021, 5 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 41.0 ppb (38) 0.36 ppb (5) N/A 47.7 μg/m3 (132) 132.0
 
July 25, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 46.0 ppb (43) 0.34 ppb (4) N/A 41.5 μg/m3 (116) 116.0
 
July 25, 2021, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 47.0 ppb (44) 0.27 ppb (4) N/A 31.8 μg/m3 (93) 93.0
 
July 25, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 45.0 ppb (42) 0.28 ppb (4) N/A 43.6 μg/m3 (121) 121.0
 
July 25, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.25 ppb (3) N/A 47.8 μg/m3 (132) 132.0
 
July 25, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.24 ppb (3) N/A 44.4 μg/m3 (123) 123.0
 
July 24, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.23 ppb (3) N/A 36.7 μg/m3 (104) 104.0
 
July 24, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 55.0 ppb (51) 0.27 ppb (4) N/A 33.3 μg/m3 (96) 96.0
 
July 24, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 56.0 ppb (55) 0.22 ppb (3) N/A 33.5 μg/m3 (97) 97.0
 
July 24, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 57.0 ppb (58) 0.24 ppb (3) N/A 34.1 μg/m3 (98) 98.0
 
July 24, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 56.0 ppb (55) 0.25 ppb (3) N/A 36.8 μg/m3 (105) 105.0
 
July 24, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.24 ppb (3) N/A 31.9 μg/m3 (93) 93.0
 
July 24, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.22 ppb (3) N/A 25.8 μg/m3 (80) 80.0
 
July 24, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) 0.25 ppb (3) N/A 27.7 μg/m3 (84) 84.0
 
July 24, 2021, 3 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.29 ppb (4) N/A 31.6 μg/m3 (93) 93.0
 
July 24, 2021, 2 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 10.0 ppb (10) 0.41 ppb (5) N/A 40.3 μg/m3 (113) 113.0
 
July 24, 2021, 1 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 4.0 ppb (4) 0.44 ppb (5) N/A 41.8 μg/m3 (117) 117.0
 
July 24, 2021, noon N/A N/A N/A 21.0 ppb (20) N/A N/A 3.0 ppb (3) 0.39 ppb (5) N/A 41.2 μg/m3 (116) 116.0
 
July 24, 2021, 11 a.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 4.0 ppb (4) 0.3 ppb (4) N/A 39.6 μg/m3 (112) 112.0
 
July 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 38.3 μg/m3 (108) 108.0
 
July 24, 2021, 9 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 19.0 ppb (18) 0.3 ppb (4) N/A 40.2 μg/m3 (113) 113.0
 
July 24, 2021, 8 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 21.0 ppb (20) 0.34 ppb (4) N/A 42.8 μg/m3 (119) 119.0
 
July 24, 2021, 7 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 23.0 ppb (22) 0.35 ppb (4) N/A 41.5 μg/m3 (116) 116.0
 
July 24, 2021, 6 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) 0.35 ppb (4) N/A 42.6 μg/m3 (119) 119.0
 
July 24, 2021, 5 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 29.0 ppb (27) 0.41 ppb (5) N/A 47.9 μg/m3 (132) 132.0
 
July 24, 2021, 4 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) 0.42 ppb (5) N/A 54.7 μg/m3 (149) 149.0
 
July 24, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) 0.38 ppb (5) N/A 58.1 μg/m3 (153) 153.0
 
July 24, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 43.0 ppb (40) 0.26 ppb (4) N/A 39.8 μg/m3 (112) 112.0
 
July 24, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.14 ppb (2) N/A 17.3 μg/m3 (62) 62.0
 
July 24, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.13 ppb (2) N/A 14.7 μg/m3 (57) 57.0
 
July 23, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.12 ppb (2) N/A 13.6 μg/m3 (55) 55.0
 
July 23, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 48.0 ppb (45) 0.14 ppb (2) N/A 20.4 μg/m3 (69) 69.0
 
July 23, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.15 ppb (2) N/A 21.6 μg/m3 (71) 71.0
 
July 23, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.15 ppb (2) N/A 24.4 μg/m3 (77) 77.0
 
July 23, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 49.0 ppb (46) 0.17 ppb (3) N/A 30.5 μg/m3 (90) 90.0
 
July 23, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 46.0 ppb (43) 0.22 ppb (3) N/A 43.6 μg/m3 (121) 121.0
 
July 23, 2021, 5 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 42.0 ppb (39) 0.34 ppb (4) N/A 77.5 μg/m3 (163) 163.0
 
July 23, 2021, 4 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 32.0 ppb (30) 0.34 ppb (4) N/A 52.3 μg/m3 (143) 143.0
 
July 23, 2021, 3 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 15.0 ppb (14) 0.41 ppb (5) N/A 40.9 μg/m3 (115) 115.0
 
July 23, 2021, 2 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 9.0 ppb (9) 0.38 ppb (5) N/A 34.8 μg/m3 (99) 99.0