ID: 935

AQSQID: 171132003

Site Name: Normal

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

Updated: July 25, 2021, 6:55 a.m.

Location: Normal (Gregory St), IL

Reporting: True, Located: True

Current AQI: 30.0

Normal (Gregory St) IL, US: 40.5169, -88.9975

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 25, 2021, 5 a.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
 
July 25, 2021, 4 a.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
 
July 25, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 6.4 μg/m3 (27) 34.0
 
July 25, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 6.5 μg/m3 (28) 38.0
 
July 25, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 7.8 μg/m3 (33) 33.0
 
July 25, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 8.9 μg/m3 (38) 38.0
 
July 24, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 24, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 24, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 24, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 12.8 μg/m3 (53) 53.0
 
July 24, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 14.8 μg/m3 (57) 57.0
 
July 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 18.2 μg/m3 (64) 64.0
 
July 24, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 20.9 μg/m3 (70) 70.0
 
July 24, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 21.9 μg/m3 (72) 72.0
 
July 24, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 23.7 μg/m3 (76) 76.0
 
July 24, 2021, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 25.9 μg/m3 (81) 81.0
 
July 24, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 27.3 μg/m3 (83) 83.0
 
July 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 28.6 μg/m3 (86) 86.0
 
July 24, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 29.5 μg/m3 (88) 88.0
 
July 24, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 28.9 μg/m3 (87) 87.0
 
July 24, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 29.3 μg/m3 (88) 88.0
 
July 24, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 30.4 μg/m3 (90) 90.0
 
July 24, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 32.5 μg/m3 (94) 94.0
 
July 24, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 34.0 μg/m3 (98) 98.0
 
July 24, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 34.6 μg/m3 (99) 99.0
 
July 24, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 35.2 μg/m3 (100) 100.0
 
July 24, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 36.4 μg/m3 (104) 104.0
 
July 24, 2021, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 37.4 μg/m3 (106) 106.0
 
July 23, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 36.7 μg/m3 (104) 104.0
 
July 23, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 35.7 μg/m3 (102) 102.0
 
July 23, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 36.9 μg/m3 (105) 105.0
 
July 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 35.9 μg/m3 (102) 102.0
 
July 23, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 35.7 μg/m3 (102) 102.0
 
July 23, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 35.9 μg/m3 (102) 102.0
 
July 23, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 35.6 μg/m3 (102) 102.0
 
July 23, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 35.4 μg/m3 (100) 100.0
 
July 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 35.4 μg/m3 (100) 100.0
 
July 23, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 35.7 μg/m3 (102) 102.0
 
July 23, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 35.9 μg/m3 (102) 102.0
 
July 23, 2021, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 36.1 μg/m3 (103) 103.0
 
July 23, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 34.9 μg/m3 (99) 99.0
 
July 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 33.7 μg/m3 (97) 97.0
 
July 23, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 32.5 μg/m3 (94) 94.0
 
July 23, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 30.8 μg/m3 (91) 91.0
 
July 23, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 29.0 μg/m3 (87) 87.0
 
July 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 30.3 μg/m3 (90) 90.0
 
July 23, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 29.7 μg/m3 (89) 89.0
 
July 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 28.0 μg/m3 (85) 85.0
 
July 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 26.8 μg/m3 (82) 82.0
 
July 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 25.1 μg/m3 (79) 79.0
 
July 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 24.6 μg/m3 (78) 78.0
 
July 23, 2021, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 24.0 μg/m3 (77) 77.0
 
July 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 23.6 μg/m3 (76) 76.0
 
July 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 24.5 μg/m3 (78) 78.0
 
July 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 24.1 μg/m3 (77) 77.0
 
July 22, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 24.3 μg/m3 (77) 77.0
 
July 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 23.7 μg/m3 (76) 76.0
 
July 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (79) 79.0
 
July 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 28.2 μg/m3 (85) 85.0
 
July 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 32.0 μg/m3 (93) 93.0
 
July 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 39.6 μg/m3 (112) 112.0
 
July 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 41.6 μg/m3 (117) 117.0
 
July 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 38.8 μg/m3 (110) 110.0
 
July 22, 2021, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 33.9 μg/m3 (97) 97.0
 
July 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 31.4 μg/m3 (92) 92.0
 
July 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 31.3 μg/m3 (92) 92.0
 
July 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 31.8 μg/m3 (93) 93.0
 
July 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 32.7 μg/m3 (95) 95.0
 
July 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 34.6 μg/m3 (99) 99.0
 
July 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 36.6 μg/m3 (104) 104.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 38.4 μg/m3 (109) 109.0
 
July 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 39.1 μg/m3 (110) 110.0
 
July 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 39.7 μg/m3 (112) 112.0
 
July 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 38.1 μg/m3 (108) 108.0
 
July 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 34.5 μg/m3 (99) 99.0
 
July 22, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 32.6 μg/m3 (95) 95.0
 
July 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 31.9 μg/m3 (93) 93.0
 
July 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 32.5 μg/m3 (94) 94.0
 
July 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 34.4 μg/m3 (98) 98.0
 
July 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 34.4 μg/m3 (98) 98.0
 
July 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 38.2 μg/m3 (108) 108.0
 
July 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 42.1 μg/m3 (118) 118.0
 
July 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 45.6 μg/m3 (126) 126.0
 
July 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 47.6 μg/m3 (131) 131.0
 
July 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 47.0 μg/m3 (130) 130.0
 
July 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 48.2 μg/m3 (133) 133.0
 
July 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 47.9 μg/m3 (132) 132.0
 
July 21, 2021, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 46.5 μg/m3 (129) 129.0
 
July 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 41.9 μg/m3 (117) 117.0
 
July 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 40.1 μg/m3 (113) 113.0
 
July 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 35.9 μg/m3 (102) 102.0
 
July 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 33.1 μg/m3 (96) 96.0
 
July 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 23.0 μg/m3 (74) 74.0
 
July 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 15.4 μg/m3 (58) 58.0
 
July 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 13.2 μg/m3 (54) 54.0
 
July 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 13.2 μg/m3 (54) 54.0
 
July 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 21, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 12.3 μg/m3 (52) 52.0
 
July 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 13.2 μg/m3 (54) 54.0
 
July 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 14.2 μg/m3 (56) 56.0
 
July 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 15.9 μg/m3 (59) 59.0
 
July 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 16.4 μg/m3 (61) 61.0
 
July 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 14.7 μg/m3 (57) 57.0
 
July 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 13.2 μg/m3 (54) 54.0
 
July 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 12.1 μg/m3 (51) 51.0
 
July 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 11.6 μg/m3 (49) 49.0
 
July 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 11.6 μg/m3 (49) 49.0
 
July 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 11.2 μg/m3 (47) 47.0
 
July 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 20, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 11.6 μg/m3 (49) 49.0
 
July 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 12.0 μg/m3 (50) 50.0
 
July 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 11.8 μg/m3 (50) 50.0
 
July 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 11.3 μg/m3 (48) 48.0
 
July 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 11.0 μg/m3 (46) 46.0
 
July 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 10.2 μg/m3 (43) 43.0
 
July 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 9.7 μg/m3 (41) 41.0
 
July 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 9.1 μg/m3 (38) 38.0
 
July 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 8.6 μg/m3 (36) 36.0
 
July 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 7.7 μg/m3 (33) 33.0
 
July 20, 2021, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 7.3 μg/m3 (31) 38.0
 
July 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 8.4 μg/m3 (36) 42.0
 
July 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 8.7 μg/m3 (37) 43.0
 
July 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 8.2 μg/m3 (35) 44.0
 
July 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 8.2 μg/m3 (35) 45.0
 
July 19, 2021, 7 p.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
 
July 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 8.6 μg/m3 (36) 42.0
 
July 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 8.7 μg/m3 (37) 43.0
 
July 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 9.0 μg/m3 (38) 42.0
 
July 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 8.8 μg/m3 (37) 37.0
 
July 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 8.1 μg/m3 (34) 34.0
 
July 19, 2021, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 8.8 μg/m3 (37) 37.0
 
July 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 8.8 μg/m3 (37) 37.0
 
July 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 8.6 μg/m3 (36) 36.0
 
July 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 8.4 μg/m3 (36) 36.0
 
July 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 8.0 μg/m3 (34) 34.0
 
July 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 7.2 μg/m3 (31) 31.0
 
July 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 6.7 μg/m3 (28) 28.0
 
July 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 7.5 μg/m3 (32) 32.0
 
July 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 8.0 μg/m3 (34) 34.0
 
July 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 8.7 μg/m3 (37) 37.0
 
July 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 19, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 8.8 μg/m3 (37) 37.0
 
July 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 9.1 μg/m3 (38) 40.0
 
July 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 8.1 μg/m3 (34) 41.0
 
July 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 7.9 μg/m3 (33) 41.0
 
July 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 7.5 μg/m3 (32) 38.0
 
July 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.7 μg/m3 (28) 36.0
 
July 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 7.9 μg/m3 (33) 33.0
 
July 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 9.9 μg/m3 (42) 42.0
 
July 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 11.2 μg/m3 (47) 47.0
 
July 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 12.0 μg/m3 (50) 50.0
 
July 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 13.5 μg/m3 (54) 54.0
 
July 18, 2021, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 10.8 μg/m3 (46) 46.0
 
July 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 10.9 μg/m3 (46) 46.0
 
July 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 12.5 μg/m3 (52) 52.0
 
July 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 10.5 μg/m3 (44) 44.0