ID: 645

AQSQID: 380650002

Site Name: Hannover

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

Updated: July 30, 2021, 6:55 p.m.

Location: Stanton (N Dakota Hwy 31), ND

Reporting: True, Located: True

Current AQI: 215.0

Stanton (N Dakota Hwy 31) ND, US: 47.1858, -101.4281

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 30, 2021, 4 p.m. 3.3 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 63.0 ppb (78) N/A N/A 164.2 μg/m3 (215) 215.0
 
July 30, 2021, 3 p.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 56.0 ppb (55) N/A N/A 134.2 μg/m3 (192) 192.0
 
July 30, 2021, 2 p.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 51.0 ppb (48) N/A N/A 116.8 μg/m3 (183) 183.0
 
July 30, 2021, 1 p.m. 3.4 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 65.5 μg/m3 (157) 157.0
 
July 30, 2021, noon 3.9 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 54.9 μg/m3 (149) 149.0
 
July 30, 2021, 11 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 43.4 μg/m3 (121) 121.0
 
July 30, 2021, 10 a.m. 2.8 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 29.9 μg/m3 (89) 89.0
 
July 30, 2021, 9 a.m. 2.1 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 23.1 μg/m3 (75) 75.0
 
July 30, 2021, 8 a.m. 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 22.3 μg/m3 (73) 73.0
 
July 30, 2021, 7 a.m. 1.8 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 21.7 μg/m3 (72) 72.0
 
July 30, 2021, 6 a.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 21.2 μg/m3 (71) 71.0
 
July 30, 2021, 5 a.m. 1.6 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 24.0 μg/m3 (77) 77.0
 
July 30, 2021, 4 a.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 23.5 μg/m3 (75) 75.0
 
July 30, 2021, 3 a.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 23.0 μg/m3 (74) 74.0
 
July 30, 2021, 2 a.m. 1.9 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 29.6 μg/m3 (88) 88.0
 
July 30, 2021, 1 a.m. 1.6 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 29.4 μg/m3 (88) 88.0
 
July 30, 2021, midnight 1.5 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 26.0 μg/m3 (81) 81.0
 
July 29, 2021, 11 p.m. 1.4 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 27.1 μg/m3 (83) 83.0
 
July 29, 2021, 10 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 21.9 μg/m3 (72) 72.0
 
July 29, 2021, 9 p.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 14.3 μg/m3 (56) 56.0
 
July 29, 2021, 8 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 9.7 μg/m3 (41) 41.0
 
July 29, 2021, 7 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 29, 2021, 6 p.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 9.3 μg/m3 (39) 39.0
 
July 29, 2021, 5 p.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 29, 2021, 4 p.m. 2.1 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 12.6 μg/m3 (53) 53.0
 
July 29, 2021, 3 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 29, 2021, 2 p.m. 3.1 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 29, 2021, 1 p.m. 3.4 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 9.3 μg/m3 (39) 39.0
 
July 29, 2021, noon 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 29, 2021, 11 a.m. 2.2 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 8.6 μg/m3 (36) 36.0
 
July 29, 2021, 10 a.m. 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 9.1 μg/m3 (38) 38.0
 
July 29, 2021, 9 a.m. 3.5 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 10.8 μg/m3 (46) 46.0
 
July 29, 2021, 8 a.m. 4.1 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 29, 2021, 7 a.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 13.0 μg/m3 (53) 53.0
 
July 29, 2021, 6 a.m. 2.1 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 13.4 μg/m3 (54) 54.0
 
July 29, 2021, 5 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 15.2 μg/m3 (58) 58.0
 
July 29, 2021, 4 a.m. 2.4 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 15.4 μg/m3 (58) 58.0
 
July 29, 2021, 3 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 16.4 μg/m3 (61) 61.0
 
July 29, 2021, 2 a.m. 2.4 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 16.3 μg/m3 (60) 60.0
 
July 29, 2021, 1 a.m. 2.1 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 20.4 μg/m3 (69) 69.0
 
July 29, 2021, midnight 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 28.1 μg/m3 (85) 85.0
 
July 28, 2021, 11 p.m. 2.3 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 31.8 μg/m3 (93) 93.0
 
July 28, 2021, 10 p.m. 2.2 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 30.1 μg/m3 (89) 89.0
 
July 28, 2021, 9 p.m. 2.3 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 23.8 μg/m3 (76) 76.0
 
July 28, 2021, 8 p.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 22.4 μg/m3 (73) 73.0
 
July 28, 2021, 7 p.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 23.5 μg/m3 (75) 75.0
 
July 28, 2021, 6 p.m. 2.7 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 22.2 μg/m3 (73) 73.0
 
July 28, 2021, 5 p.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 23.0 μg/m3 (74) 74.0
 
July 28, 2021, 4 p.m. 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 25.2 μg/m3 (79) 79.0
 
July 28, 2021, 3 p.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 27.3 μg/m3 (83) 83.0
 
July 28, 2021, 2 p.m. 3.8 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) N/A N/A 27.4 μg/m3 (84) 84.0
 
July 28, 2021, 1 p.m. 5.5 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 25.8 μg/m3 (80) 80.0
 
July 28, 2021, noon 4.6 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 20.3 μg/m3 (69) 69.0
 
July 28, 2021, 11 a.m. 4.8 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 18.8 μg/m3 (66) 66.0
 
July 28, 2021, 10 a.m. 3.2 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 17.7 μg/m3 (63) 63.0
 
July 28, 2021, 9 a.m. 3.1 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 18.2 μg/m3 (64) 64.0
 
July 28, 2021, 8 a.m. 3.5 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 18.2 μg/m3 (64) 64.0
 
July 28, 2021, 7 a.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 17.3 μg/m3 (62) 62.0
 
July 28, 2021, 6 a.m. 3.7 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 17.8 μg/m3 (63) 63.0
 
July 28, 2021, 5 a.m. 4.5 ppb (5) 0.2 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 17.5 μg/m3 (63) 63.0
 
July 28, 2021, 4 a.m. 4.1 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 18.1 μg/m3 (64) 64.0
 
July 28, 2021, 3 a.m. 3.7 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 18.5 μg/m3 (65) 65.0
 
July 28, 2021, 2 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 18.8 μg/m3 (66) 66.0
 
July 28, 2021, 1 a.m. 3.8 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 19.6 μg/m3 (67) 67.0
 
July 28, 2021, midnight 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 21.0 μg/m3 (70) 70.0
 
July 27, 2021, 11 p.m. 7.8 ppb (8) 1.1 ppb (2) N/A 7.0 ppb (7) N/A 2.0 ppb (3) 48.0 ppb (45) N/A N/A 21.4 μg/m3 (71) 71.0
 
July 27, 2021, 10 p.m. 11.8 ppb (12) 1.4 ppb (2) N/A 10.0 ppb (10) N/A 3.0 ppb (5) 43.0 ppb (40) N/A N/A 21.1 μg/m3 (70) 70.0
 
July 27, 2021, 9 p.m. 16.4 ppb (16) 1.6 ppb (2) N/A 15.0 ppb (15) N/A 4.0 ppb (6) 38.0 ppb (36) N/A N/A 21.5 μg/m3 (71) 71.0
 
July 27, 2021, 8 p.m. 5.1 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 48.0 ppb (45) N/A N/A 21.6 μg/m3 (71) 71.0
 
July 27, 2021, 7 p.m. 3.2 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 23.2 μg/m3 (75) 75.0
 
July 27, 2021, 6 p.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 55.0 ppb (51) N/A N/A 22.5 μg/m3 (73) 73.0
 
July 27, 2021, 5 p.m. 16.1 ppb (16) 3.8 ppb (4) N/A 12.0 ppb (12) N/A 4.0 ppb (6) 44.0 ppb (41) N/A N/A 19.8 μg/m3 (68) 68.0
 
July 27, 2021, 4 p.m. 20.6 ppb (20) 4.7 ppb (5) N/A 16.0 ppb (16) N/A 6.0 ppb (9) 36.0 ppb (34) N/A N/A 18.6 μg/m3 (65) 65.0
 
July 27, 2021, 3 p.m. 11.4 ppb (11) 2.1 ppb (2) N/A 9.0 ppb (9) N/A 4.0 ppb (6) 40.0 ppb (38) N/A N/A 18.6 μg/m3 (65) 65.0
 
July 27, 2021, 2 p.m. 4.7 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 18.7 μg/m3 (65) 65.0
 
July 27, 2021, 1 p.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 18.7 μg/m3 (65) 65.0
 
July 27, 2021, noon 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 19.1 μg/m3 (66) 66.0
 
July 27, 2021, 11 a.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 19.0 μg/m3 (66) 66.0
 
July 27, 2021, 10 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 19.0 μg/m3 (66) 66.0
 
July 27, 2021, 9 a.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 19.0 μg/m3 (66) 66.0
 
July 27, 2021, 8 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 18.7 μg/m3 (65) 65.0
 
July 27, 2021, 7 a.m. 2.1 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 18.3 μg/m3 (65) 65.0
 
July 27, 2021, 6 a.m. 2.0 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 18.5 μg/m3 (65) 65.0
 
July 27, 2021, 5 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 19.8 μg/m3 (68) 68.0
 
July 27, 2021, 4 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 20.5 μg/m3 (69) 69.0
 
July 27, 2021, 3 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 24.5 μg/m3 (78) 78.0
 
July 27, 2021, 2 a.m. 3.1 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 59.0 ppb (65) N/A N/A 29.3 μg/m3 (88) 88.0
 
July 27, 2021, 1 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 62.0 ppb (74) N/A N/A 29.3 μg/m3 (88) 88.0
 
July 27, 2021, midnight 2.9 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 67.0 ppb (91) N/A N/A 29.2 μg/m3 (87) 91.0
 
July 26, 2021, 11 p.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 71.0 ppb (101) N/A N/A 28.3 μg/m3 (86) 101.0
 
July 26, 2021, 10 p.m. 2.9 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 70.0 ppb (100) N/A N/A 24.5 μg/m3 (78) 100.0
 
July 26, 2021, 9 p.m. 3.3 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 70.0 ppb (100) N/A N/A 23.6 μg/m3 (76) 100.0
 
July 26, 2021, 8 p.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 67.0 ppb (91) N/A N/A 23.8 μg/m3 (76) 91.0
 
July 26, 2021, 7 p.m. 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 59.0 ppb (65) N/A N/A 21.9 μg/m3 (72) 72.0
 
July 26, 2021, 6 p.m. 3.3 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 51.0 ppb (48) N/A N/A 21.1 μg/m3 (70) 70.0
 
July 26, 2021, 5 p.m. 3.4 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 21.0 μg/m3 (70) 70.0
 
July 26, 2021, 4 p.m. 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 21.1 μg/m3 (70) 70.0
 
July 26, 2021, 3 p.m. 6.2 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 21.6 μg/m3 (71) 71.0
 
July 26, 2021, 2 p.m. 15.5 ppb (15) 3.8 ppb (4) N/A 12.0 ppb (12) N/A 4.0 ppb (6) 25.0 ppb (24) N/A N/A 22.9 μg/m3 (74) 74.0
 
July 26, 2021, 1 p.m. 4.7 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 25.2 μg/m3 (79) 79.0
 
July 26, 2021, noon 4.3 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 26.7 μg/m3 (82) 82.0
 
July 26, 2021, 11 a.m. 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 28.0 μg/m3 (85) 85.0
 
July 26, 2021, 10 a.m. 3.4 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 28.8 μg/m3 (87) 87.0
 
July 26, 2021, 9 a.m. 3.0 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 27.1 μg/m3 (83) 83.0
 
July 26, 2021, 8 a.m. 3.4 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 28.0 μg/m3 (85) 85.0
 
July 26, 2021, 7 a.m. 3.6 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 31.7 μg/m3 (93) 93.0
 
July 26, 2021, 6 a.m. 2.6 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 38.1 μg/m3 (108) 108.0
 
July 26, 2021, 5 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 56.0 ppb (55) N/A N/A 40.1 μg/m3 (113) 113.0
 
July 26, 2021, 4 a.m. 2.2 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 60.0 ppb (68) N/A N/A 41.0 μg/m3 (115) 115.0
 
July 26, 2021, 3 a.m. 2.2 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 61.0 ppb (71) N/A N/A 41.9 μg/m3 (117) 117.0
 
July 26, 2021, 2 a.m. 2.7 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 64.0 ppb (81) N/A N/A 43.8 μg/m3 (122) 122.0
 
July 26, 2021, 1 a.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 74.0 ppb (103) N/A N/A 46.1 μg/m3 (128) 128.0
 
July 26, 2021, midnight 3.3 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A 45.3 μg/m3 (126) 126.0
 
July 25, 2021, 11 p.m. 4.2 ppb (4) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A N/A 44.3 μg/m3 (123) 123.0
 
July 25, 2021, 10 p.m. 4.5 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A N/A 44.0 μg/m3 (122) 122.0
 
July 25, 2021, 9 p.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A 46.5 μg/m3 (129) 129.0
 
July 25, 2021, 8 p.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A 49.1 μg/m3 (135) 135.0
 
July 25, 2021, 7 p.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A 46.8 μg/m3 (129) 129.0
 
July 25, 2021, 6 p.m. 3.3 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A N/A 47.1 μg/m3 (130) 130.0
 
July 25, 2021, 5 p.m. 3.8 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) N/A N/A N/A 48.7 μg/m3 (134) 134.0
 
July 25, 2021, 4 p.m. 3.6 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 69.0 ppb (97) N/A N/A 46.4 μg/m3 (128) 128.0
 
July 25, 2021, 3 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 55.0 ppb (51) N/A N/A 45.3 μg/m3 (126) 126.0
 
July 25, 2021, 2 p.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 44.7 μg/m3 (124) 124.0
 
July 25, 2021, 1 p.m. 4.3 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 42.5 μg/m3 (119) 119.0
 
July 25, 2021, noon 4.1 ppb (4) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 40.5 μg/m3 (114) 114.0
 
July 25, 2021, 11 a.m. 4.0 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 42.0 ppb (39) N/A N/A 41.6 μg/m3 (117) 117.0
 
July 25, 2021, 10 a.m. 4.2 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 47.0 ppb (44) N/A N/A 46.3 μg/m3 (128) 128.0
 
July 25, 2021, 9 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 47.5 μg/m3 (131) 131.0
 
July 25, 2021, 8 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 44.3 μg/m3 (123) 123.0
 
July 25, 2021, 7 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 51.0 ppb (48) N/A N/A 42.9 μg/m3 (120) 120.0
 
July 25, 2021, 6 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 43.6 μg/m3 (121) 121.0
 
July 25, 2021, 5 a.m. 3.0 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 43.3 μg/m3 (121) 121.0
 
July 25, 2021, 4 a.m. 3.5 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 42.2 μg/m3 (118) 118.0
 
July 25, 2021, 3 a.m. 3.1 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 56.0 ppb (55) N/A N/A 40.9 μg/m3 (115) 115.0
 
July 25, 2021, 2 a.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 58.0 ppb (61) N/A N/A 37.7 μg/m3 (107) 107.0
 
July 25, 2021, 1 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 56.0 ppb (55) N/A N/A 39.3 μg/m3 (111) 111.0
 
July 25, 2021, midnight 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 59.0 ppb (65) N/A N/A 43.0 μg/m3 (120) 120.0
 
July 24, 2021, 11 p.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 60.0 ppb (68) N/A N/A 46.8 μg/m3 (129) 129.0
 
July 24, 2021, 10 p.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 57.0 ppb (58) N/A N/A 52.6 μg/m3 (144) 144.0
 
July 24, 2021, 9 p.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 56.0 ppb (55) N/A N/A 47.8 μg/m3 (132) 132.0
 
July 24, 2021, 8 p.m. 2.7 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 57.0 ppb (58) N/A N/A 37.3 μg/m3 (106) 106.0
 
July 24, 2021, 7 p.m. 2.7 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 56.0 ppb (55) N/A N/A 39.2 μg/m3 (111) 111.0
 
July 24, 2021, 6 p.m. 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 54.0 ppb (50) N/A N/A 37.5 μg/m3 (106) 106.0
 
July 24, 2021, 5 p.m. 3.6 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 55.0 ppb (51) N/A N/A 31.7 μg/m3 (93) 93.0
 
July 24, 2021, 4 p.m. 5.9 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 31.1 μg/m3 (91) 91.0
 
July 24, 2021, 3 p.m. 8.6 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 32.5 μg/m3 (94) 94.0
 
July 24, 2021, 2 p.m. 7.5 ppb (8) 1.5 ppb (2) N/A 6.0 ppb (6) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 27.2 μg/m3 (83) 83.0
 
July 24, 2021, 1 p.m. 5.2 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 22.1 μg/m3 (73) 73.0
 
July 24, 2021, noon 5.0 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 18.1 μg/m3 (64) 64.0
 
July 24, 2021, 11 a.m. 3.9 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 16.3 μg/m3 (60) 60.0
 
July 24, 2021, 10 a.m. 3.7 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 15.9 μg/m3 (59) 59.0
 
July 24, 2021, 9 a.m. 3.7 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 15.8 μg/m3 (59) 59.0
 
July 24, 2021, 8 a.m. 5.2 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 44.0 ppb (41) N/A N/A 16.4 μg/m3 (61) 61.0
 
July 24, 2021, 7 a.m. 4.1 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 14.8 μg/m3 (57) 57.0
 
July 24, 2021, 6 a.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 12.5 μg/m3 (52) 52.0
 
July 24, 2021, 5 a.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 10.9 μg/m3 (46) 47.0
 
July 24, 2021, 4 a.m. 3.6 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 49.0 ppb (46) N/A N/A 12.2 μg/m3 (52) 52.0
 
July 24, 2021, 3 a.m. 4.1 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 49.0 ppb (46) N/A N/A 13.8 μg/m3 (55) 55.0
 
July 24, 2021, 2 a.m. 4.3 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 16.3 μg/m3 (60) 60.0
 
July 24, 2021, 1 a.m. 4.1 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 59.0 ppb (65) N/A N/A 20.8 μg/m3 (70) 70.0
 
July 24, 2021, midnight 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 64.0 ppb (81) N/A N/A 20.7 μg/m3 (70) 81.0
 
July 23, 2021, 11 p.m. 3.4 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 65.0 ppb (84) N/A N/A 20.8 μg/m3 (70) 84.0
 
July 23, 2021, 10 p.m. 3.8 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 68.0 ppb (94) N/A N/A 18.3 μg/m3 (65) 94.0
 
July 23, 2021, 9 p.m. 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 68.0 ppb (94) N/A N/A 15.6 μg/m3 (59) 94.0
 
July 23, 2021, 8 p.m. 4.0 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 64.0 ppb (81) N/A N/A 15.2 μg/m3 (58) 81.0
 
July 23, 2021, 7 p.m. 4.3 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 63.0 ppb (78) N/A N/A 15.7 μg/m3 (59) 78.0
 
July 23, 2021, 6 p.m. 3.5 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 66.0 ppb (87) N/A N/A 15.9 μg/m3 (59) 87.0
 
July 23, 2021, 5 p.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 62.0 ppb (74) N/A N/A 17.7 μg/m3 (63) 74.0