ID: 2427

AQSQID: 300310017

Site Name: West Yellowstone Park Ent #2

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

Updated: July 25, 2021, 8:55 a.m.

Location: W Yellowstone (W Entrance Rd), MT

Reporting: True, Located: True

Current AQI: 79.0

W Yellowstone (W Entrance Rd) MT, US: 44.657014, -111.089618

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 25, 2021, 8 a.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 24.0 μg/m3 (77) 77.0
 
July 25, 2021, 7 a.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 25, 2021, 6 a.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (5) N/A 26.0 μg/m3 (81) 81.0
 
July 25, 2021, 5 a.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 25, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 29.0 μg/m3 (87) 87.0
 
July 25, 2021, 3 a.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.41 ppb (5) N/A 27.0 μg/m3 (83) 83.0
 
July 25, 2021, 2 a.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.42 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 25, 2021, 1 a.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.41 ppb (5) N/A 26.0 μg/m3 (81) 81.0
 
July 25, 2021, midnight 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.4 ppb (5) N/A 23.0 μg/m3 (74) 74.0
 
July 24, 2021, 11 p.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.41 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 24, 2021, 10 p.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.41 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 24, 2021, 9 p.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.42 ppb (5) N/A 27.0 μg/m3 (83) 83.0
 
July 24, 2021, 8 p.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.4 ppb (5) N/A 33.0 μg/m3 (95) 95.0
 
July 24, 2021, 7 p.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.42 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 24, 2021, 6 p.m. 9.7 ppb (10) 5.9 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.41 ppb (5) N/A 23.0 μg/m3 (74) 74.0
 
July 24, 2021, 5 p.m. 7.5 ppb (8) 3.5 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.44 ppb (5) N/A 20.0 μg/m3 (68) 68.0
 
July 24, 2021, 4 p.m. 5.6 ppb (6) 2.4 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.41 ppb (5) N/A 19.0 μg/m3 (66) 66.0
 
July 24, 2021, 3 p.m. 3.3 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.44 ppb (5) N/A 23.0 μg/m3 (74) 74.0
 
July 24, 2021, 2 p.m. 4.8 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.41 ppb (5) N/A 19.0 μg/m3 (66) 66.0
 
July 24, 2021, 1 p.m. 26.5 ppb (25) 15.7 ppb (15) N/A 11.0 ppb (11) N/A N/A N/A 0.5 ppb (6) N/A 22.0 μg/m3 (72) 72.0
 
July 24, 2021, noon 22.6 ppb (22) 13.1 ppb (13) N/A 10.0 ppb (10) N/A N/A N/A 0.38 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
July 24, 2021, 11 a.m. 1.0 ppb (1) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
July 24, 2021, 10 a.m. 0.9 ppb (1) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (4) N/A 21.0 μg/m3 (70) 70.0
 
July 24, 2021, 9 a.m. 0.3 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.32 ppb (4) N/A 24.0 μg/m3 (77) 77.0
 
July 24, 2021, 8 a.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.32 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
July 24, 2021, 7 a.m. 2.5 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.32 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
July 24, 2021, 6 a.m. 1.5 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A 22.0 μg/m3 (72) 72.0
 
July 24, 2021, 5 a.m. 1.1 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A 20.0 μg/m3 (68) 68.0
 
July 24, 2021, 4 a.m. 3.0 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 23.0 μg/m3 (74) 74.0
 
July 24, 2021, 3 a.m. 5.4 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (5) N/A 20.0 μg/m3 (68) 68.0
 
July 24, 2021, 2 a.m. 4.2 ppb (4) 1.4 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 21.0 μg/m3 (70) 70.0
 
July 24, 2021, 1 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 22.0 μg/m3 (72) 72.0
 
July 24, 2021, midnight 2.6 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.37 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
July 23, 2021, 11 p.m. 4.6 ppb (5) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (5) N/A 20.0 μg/m3 (68) 68.0
 
July 23, 2021, 10 p.m. 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
July 23, 2021, 9 p.m. 6.3 ppb (6) 2.9 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.41 ppb (5) N/A 23.0 μg/m3 (74) 74.0
 
July 23, 2021, 8 p.m. 2.4 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.41 ppb (5) N/A 22.0 μg/m3 (72) 72.0
 
July 23, 2021, 7 p.m. 2.7 ppb (3) 1.2 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.37 ppb (5) N/A 19.0 μg/m3 (66) 66.0
 
July 23, 2021, 6 p.m. 6.5 ppb (7) 2.4 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.39 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
July 23, 2021, 5 p.m. 6.2 ppb (6) 2.8 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.37 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 4 p.m. 3.2 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 3 p.m. 5.7 ppb (6) 2.3 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.37 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 2 p.m. 10.2 ppb (10) 6.7 ppb (7) N/A 3.0 ppb (3) N/A N/A N/A 0.39 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 1 p.m. 10.2 ppb (10) 6.7 ppb (7) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, noon 19.9 ppb (19) 15.6 ppb (15) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 11 a.m. 4.2 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 9 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 8 a.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 2 a.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 1 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, midnight 2.1 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 22, 2021, 11 p.m. 2.3 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 10 p.m. 3.0 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 22, 2021, 9 p.m. 3.3 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, 8 p.m. 5.1 ppb (5) 2.5 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 22, 2021, 7 p.m. 2.1 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 6 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, 5 p.m. 3.7 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 4 p.m. 3.8 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.4 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 3 p.m. 10.0 ppb (10) 3.9 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.48 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
July 22, 2021, 2 p.m. 20.6 ppb (20) 12.4 ppb (12) N/A 8.0 ppb (8) N/A N/A N/A 0.47 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
July 22, 2021, 1 p.m. 15.9 ppb (15) 7.5 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.47 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, noon 11.4 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.36 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
July 22, 2021, 11 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.32 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
July 22, 2021, 10 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
July 22, 2021, 9 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 22, 2021, 8 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.31 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
July 22, 2021, 7 a.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
July 22, 2021, 6 a.m. 1.0 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
July 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (60) 60.0
 
July 22, 2021, 3 a.m. 7.4 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.43 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
July 22, 2021, 2 a.m. 4.9 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.4 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
July 22, 2021, 1 a.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.37 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
July 22, 2021, midnight 2.3 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 21, 2021, 11 p.m. 1.3 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.36 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
July 21, 2021, 10 p.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.37 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
July 21, 2021, 9 p.m. 3.6 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.4 ppb (5) N/A 19.0 μg/m3 (66) 66.0
 
July 21, 2021, 8 p.m. 3.4 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.4 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
July 21, 2021, 7 p.m. 2.9 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
July 21, 2021, 6 p.m. 3.1 ppb (3) 1.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
July 21, 2021, 5 p.m. 5.6 ppb (6) 2.6 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 21, 2021, 4 p.m. 6.3 ppb (6) 3.1 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 21, 2021, 3 p.m. 6.0 ppb (6) 2.6 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 21, 2021, 2 p.m. 3.6 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 21, 2021, 1 p.m. 3.4 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 21, 2021, noon 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
July 21, 2021, 11 a.m. 2.2 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
July 21, 2021, 9 a.m. 0.9 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 21, 2021, 8 a.m. 1.0 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 21, 2021, 7 a.m. 1.5 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 21, 2021, 6 a.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 21, 2021, 5 a.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 21, 2021, 4 a.m. 4.5 ppb (5) 2.2 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 21, 2021, 3 a.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 21, 2021, 2 a.m. 1.6 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 21, 2021, 1 a.m. 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.38 ppb (5) N/A N/A 5.0
 
July 21, 2021, midnight 3.7 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.36 ppb (5) N/A N/A 5.0
 
July 20, 2021, 11 p.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.38 ppb (5) N/A N/A 5.0
 
July 20, 2021, 10 p.m. 2.4 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.37 ppb (5) N/A N/A 5.0
 
July 20, 2021, 9 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.38 ppb (5) N/A N/A 5.0
 
July 20, 2021, 8 p.m. 2.2 ppb (3) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 20, 2021, 7 p.m. 3.9 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 6 p.m. 7.7 ppb (8) 3.7 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
July 20, 2021, 5 p.m. 7.8 ppb (8) 4.1 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 20, 2021, 4 p.m. 13.4 ppb (13) 7.1 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 20, 2021, 3 p.m. 10.5 ppb (10) 5.1 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.4 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
July 20, 2021, 2 p.m. 12.4 ppb (12) 6.1 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
July 20, 2021, 1 p.m. 11.6 ppb (11) 4.4 ppb (5) N/A 7.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 20, 2021, noon 10.6 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 11 a.m. 4.5 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 10 a.m. 3.2 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 20, 2021, 9 a.m. 1.2 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 8 a.m. 1.0 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.31 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 7 a.m. 0.2 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 20, 2021, 6 a.m. 0.2 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 5 a.m. 0.6 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 20, 2021, 4 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 3 a.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 20, 2021, 2 a.m. 3.6 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
July 20, 2021, 1 a.m. 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
July 20, 2021, midnight 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
July 19, 2021, 11 p.m. 2.1 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 19, 2021, 10 p.m. 5.0 ppb (5) 2.7 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
July 19, 2021, 9 p.m. 3.6 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 19, 2021, 8 p.m. 4.5 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.34 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
July 19, 2021, 7 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.35 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
July 19, 2021, 6 p.m. 5.6 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.4 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
July 19, 2021, 5 p.m. 13.2 ppb (13) 5.5 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.49 ppb (6) N/A 27.0 μg/m3 (83) 83.0
 
July 19, 2021, 4 p.m. 8.6 ppb (9) 3.7 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.48 ppb (6) N/A 28.0 μg/m3 (85) 85.0
 
July 19, 2021, 3 p.m. 11.8 ppb (12) 4.6 ppb (5) N/A 7.0 ppb (7) N/A N/A N/A 0.59 ppb (7) N/A 32.0 μg/m3 (93) 93.0
 
July 19, 2021, 2 p.m. 14.1 ppb (14) 7.0 ppb (7) N/A 7.0 ppb (7) N/A N/A N/A 0.6 ppb (7) N/A 29.0 μg/m3 (87) 87.0
 
July 19, 2021, 1 p.m. 18.1 ppb (18) 9.1 ppb (9) N/A 9.0 ppb (9) N/A N/A N/A 0.63 ppb (7) N/A 29.0 μg/m3 (87) 87.0
 
July 19, 2021, noon 28.7 ppb (28) 16.3 ppb (16) N/A 12.0 ppb (12) N/A N/A N/A 0.5 ppb (6) N/A 30.0 μg/m3 (89) 89.0
 
July 19, 2021, 11 a.m. 4.5 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.47 ppb (6) N/A 26.0 μg/m3 (81) 81.0
 
July 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (85) 85.0
 
July 19, 2021, 9 a.m. 0.8 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.43 ppb (5) N/A 30.0 μg/m3 (89) 89.0
 
July 19, 2021, 8 a.m. 1.2 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.4 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 19, 2021, 7 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.41 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
July 19, 2021, 6 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.4 ppb (5) N/A 29.0 μg/m3 (87) 87.0
 
July 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (85) 85.0
 
July 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 27.0 μg/m3 (83) 83.0
 
July 19, 2021, 3 a.m. 7.9 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.5 ppb (6) N/A 29.0 μg/m3 (87) 87.0
 
July 19, 2021, 2 a.m. 7.2 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 26.0 μg/m3 (81) 81.0
 
July 19, 2021, 1 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.42 ppb (5) N/A 24.0 μg/m3 (77) 77.0
 
July 19, 2021, midnight 2.1 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 18, 2021, 11 p.m. 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.34 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
July 18, 2021, 10 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 9 p.m. 2.9 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 8 p.m. 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
July 18, 2021, 7 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 6 p.m. 3.4 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 18, 2021, 5 p.m. 7.6 ppb (8) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
July 18, 2021, 4 p.m. 4.7 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
July 18, 2021, 3 p.m. 7.9 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
July 18, 2021, 2 p.m. 8.7 ppb (9) 3.3 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.46 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
July 18, 2021, 1 p.m. 36.1 ppb (35) 22.6 ppb (22) N/A 13.0 ppb (13) N/A N/A N/A 0.53 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 18, 2021, noon 21.9 ppb (21) 9.1 ppb (9) N/A 13.0 ppb (13) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 11 a.m. 3.7 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 18, 2021, 10 a.m. 0.8 ppb (1) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 18, 2021, 9 a.m. 0.1 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 18, 2021, 8 a.m. 0.2 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 18, 2021, 7 a.m. 1.3 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 18, 2021, 6 a.m. 0.3 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.3 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 5 a.m. 0.8 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (4) N/A 6.0 μg/m3 (25) 25.0