ID: 2833

AQSQID: 560391013

Site Name: Yellowstone- Old Faithful Snow Lodge

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

Updated: Sept. 27, 2020, 6:40 p.m.

Location: Yellowstone National Park (82190), WY

Reporting: True, Located: True

Current AQI: 1.0

Yellowstone National Park (82190) WY, US: 44.373056, -110.830833

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 27, 2020, 5 p.m. 0.6 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A -1.4 μg/m3 (0) 1.0
 
Sept. 27, 2020, 4 p.m. 2.1 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -2.8 μg/m3 (0) 2.0
 
Sept. 27, 2020, 3 p.m. 3.3 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Sept. 27, 2020, 2 p.m. 4.0 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
Sept. 27, 2020, 1 p.m. 4.1 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 4.0
 
Sept. 27, 2020, noon 3.6 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 3.0
 
Sept. 27, 2020, 11 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
Sept. 27, 2020, 10 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.0
 
Sept. 27, 2020, 9 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 0.2 μg/m3 (1) 1.0
 
Sept. 27, 2020, 8 a.m. 0.7 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
Sept. 27, 2020, 7 a.m. 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Sept. 27, 2020, 6 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
Sept. 27, 2020, 5 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.9 μg/m3 (0) 1.0
 
Sept. 27, 2020, 4 a.m. 2.3 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 2.0
 
Sept. 27, 2020, 3 a.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
Sept. 27, 2020, 2 a.m. 5.7 ppb (5) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.2 μg/m3 (1) 5.0
 
Sept. 27, 2020, 1 a.m. 5.3 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -0.7 μg/m3 (0) 5.0
 
Sept. 27, 2020, midnight 4.5 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
Sept. 26, 2020, 11 p.m. 6.5 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 26, 2020, 10 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.7 μg/m3 (11) 11.0
 
Sept. 26, 2020, 9 p.m. 2.6 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -0.7 μg/m3 (0) 2.0
 
Sept. 26, 2020, 8 p.m. 1.6 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.2 μg/m3 (0) 1.0
 
Sept. 26, 2020, 7 p.m. 2.2 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
Sept. 26, 2020, 6 p.m. 2.0 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
Sept. 26, 2020, 5 p.m. 1.6 ppb (1) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.9 μg/m3 (0) 1.0
 
Sept. 26, 2020, 4 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.2 μg/m3 (0) 2.0
 
Sept. 26, 2020, 3 p.m. 1.6 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
Sept. 26, 2020, 2 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
Sept. 26, 2020, 1 p.m. 1.3 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 26, 2020, noon 0.4 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 6.2 μg/m3 (26) 26.0
 
Sept. 26, 2020, 11 a.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 9.4 μg/m3 (39) 39.0
 
Sept. 26, 2020, 10 a.m. 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 10.4 μg/m3 (43) 43.0
 
Sept. 26, 2020, 9 a.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 9.6 μg/m3 (40) 40.0
 
Sept. 26, 2020, 8 a.m. 0.5 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 8.7 μg/m3 (36) 36.0
 
Sept. 26, 2020, 7 a.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 8.4 μg/m3 (35) 35.0
 
Sept. 26, 2020, 6 a.m. 0.7 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
Sept. 26, 2020, 5 a.m. 0.6 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 7.2 μg/m3 (30) 30.0
 
Sept. 26, 2020, 4 a.m. 0.7 ppb (1) 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 7.7 μg/m3 (32) 32.0
 
Sept. 26, 2020, 3 a.m. 0.6 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 10.6 μg/m3 (44) 44.0
 
Sept. 26, 2020, 2 a.m. 1.2 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.5 μg/m3 (51) 51.0
 
Sept. 26, 2020, 1 a.m. 1.4 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 13.5 μg/m3 (53) 53.0
 
Sept. 26, 2020, midnight 2.0 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 25, 2020, 11 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 25, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.6 μg/m3 (40) 40.0
 
Sept. 25, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
Sept. 25, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 25, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 25, 2020, 6 p.m. 0.5 ppb (0) 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A N/A N/A
Sept. 25, 2020, 5 p.m. 4.6 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 8.5 μg/m3 (35) 35.0
 
Sept. 25, 2020, 4 p.m. 3.3 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.7 μg/m3 (32) 32.0
 
Sept. 25, 2020, 3 p.m. 3.4 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 10.9 μg/m3 (45) 45.0
 
Sept. 25, 2020, 2 p.m. 1.4 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 10.7 μg/m3 (45) 45.0
 
Sept. 25, 2020, 1 p.m. 3.0 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 13.1 μg/m3 (52) 52.0
 
Sept. 25, 2020, noon 4.4 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 13.7 μg/m3 (54) 54.0
 
Sept. 25, 2020, 11 a.m. 6.3 ppb (6) 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 13.8 μg/m3 (54) 54.0
 
Sept. 25, 2020, 10 a.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 13.5 μg/m3 (53) 53.0
 
Sept. 25, 2020, 9 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.3 μg/m3 (51) 51.0
 
Sept. 25, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.1 μg/m3 (57) 57.0
 
Sept. 25, 2020, 7 a.m. 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 12.7 μg/m3 (51) 51.0
 
Sept. 25, 2020, 6 a.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.5 μg/m3 (51) 51.0
 
Sept. 25, 2020, 5 a.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 15.3 μg/m3 (57) 57.0
 
Sept. 25, 2020, 4 a.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.2 μg/m3 (50) 50.0
 
Sept. 25, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.8 μg/m3 (56) 56.0
 
Sept. 25, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.6 μg/m3 (51) 51.0
 
Sept. 25, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.9 μg/m3 (56) 56.0
 
Sept. 25, 2020, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 18.3 μg/m3 (63) 63.0
 
Sept. 24, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 18.5 μg/m3 (64) 64.0
 
Sept. 24, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.9 μg/m3 (58) 58.0
 
Sept. 24, 2020, 9 p.m. 2.3 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 11.1 μg/m3 (46) 46.0
 
Sept. 24, 2020, 8 p.m. 2.5 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 17.1 μg/m3 (61) 61.0
 
Sept. 24, 2020, 7 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 16.1 μg/m3 (59) 59.0
 
Sept. 24, 2020, 6 p.m. 2.3 ppb (2) 1.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.5 μg/m3 (51) 51.0
 
Sept. 24, 2020, 5 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 7.5 μg/m3 (31) 31.0
 
Sept. 24, 2020, 4 p.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 24, 2020, 3 p.m. 1.5 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 9.4 μg/m3 (39) 39.0
 
Sept. 24, 2020, 2 p.m. 1.9 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.6 μg/m3 (51) 51.0
 
Sept. 24, 2020, 1 p.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.7 μg/m3 (32) 32.0
 
Sept. 24, 2020, noon 0.8 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 14.8 μg/m3 (56) 56.0
 
Sept. 24, 2020, 11 a.m. 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 12.4 μg/m3 (51) 51.0
 
Sept. 24, 2020, 10 a.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 10.9 μg/m3 (45) 45.0
 
Sept. 24, 2020, 9 a.m. 0.9 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.6 μg/m3 (51) 51.0
 
Sept. 24, 2020, 8 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 17.7 μg/m3 (62) 62.0
 
Sept. 24, 2020, 7 a.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.6 μg/m3 (51) 51.0
 
Sept. 24, 2020, 6 a.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.5 μg/m3 (51) 51.0
 
Sept. 24, 2020, 5 a.m. 1.3 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 13.7 μg/m3 (54) 54.0
 
Sept. 24, 2020, 4 a.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.8 μg/m3 (52) 52.0
 
Sept. 24, 2020, 3 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 10.5 μg/m3 (44) 44.0
 
Sept. 24, 2020, 2 a.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.1 μg/m3 (50) 50.0
 
Sept. 24, 2020, 1 a.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 13.2 μg/m3 (53) 53.0
 
Sept. 24, 2020, midnight 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 11.6 μg/m3 (48) 48.0
 
Sept. 23, 2020, 11 p.m. 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 12.4 μg/m3 (51) 51.0
 
Sept. 23, 2020, 10 p.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
Sept. 23, 2020, 9 p.m. 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Sept. 23, 2020, 8 p.m. 4.2 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 29.2 μg/m3 (87) 87.0
 
Sept. 23, 2020, 7 p.m. 2.3 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 28.0 μg/m3 (84) 84.0
 
Sept. 23, 2020, 6 p.m. 3.9 ppb (4) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 19.7 μg/m3 (66) 66.0
 
Sept. 23, 2020, 5 p.m. 3.5 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 19.9 μg/m3 (67) 67.0
 
Sept. 23, 2020, 4 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 27.7 μg/m3 (83) 83.0
 
Sept. 23, 2020, 3 p.m. 8.5 ppb (8) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 26.8 μg/m3 (81) 81.0
 
Sept. 23, 2020, 2 p.m. 11.5 ppb (11) 6.3 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 24.0 μg/m3 (76) 76.0
 
Sept. 23, 2020, 1 p.m. 5.3 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 20.1 μg/m3 (67) 67.0
 
Sept. 23, 2020, noon 5.6 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 18.1 μg/m3 (63) 63.0
 
Sept. 23, 2020, 11 a.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 19.6 μg/m3 (66) 66.0
 
Sept. 23, 2020, 10 a.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 25.4 μg/m3 (79) 79.0
 
Sept. 23, 2020, 9 a.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 24.2 μg/m3 (76) 76.0
 
Sept. 23, 2020, 8 a.m. 0.8 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Sept. 23, 2020, 7 a.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 21.9 μg/m3 (71) 71.0
 
Sept. 23, 2020, 6 a.m. 3.0 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 19.1 μg/m3 (65) 65.0
 
Sept. 23, 2020, 5 a.m. 1.1 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 15.4 μg/m3 (57) 57.0
 
Sept. 23, 2020, 4 a.m. 0.6 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 15.2 μg/m3 (57) 57.0
 
Sept. 23, 2020, 3 a.m. 2.5 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 16.2 μg/m3 (59) 59.0
 
Sept. 23, 2020, 2 a.m. 3.0 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 17.4 μg/m3 (61) 61.0
 
Sept. 23, 2020, 1 a.m. 6.4 ppb (6) 3.2 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 11.8 μg/m3 (49) 49.0
 
Sept. 23, 2020, midnight 7.4 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 11.5 μg/m3 (48) 48.0
 
Sept. 22, 2020, 11 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2020, 10 p.m. 2.5 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 9.9 μg/m3 (41) 41.0
 
Sept. 22, 2020, 9 p.m. 4.0 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 7.5 μg/m3 (31) 31.0
 
Sept. 22, 2020, 8 p.m. 5.3 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 9.7 μg/m3 (40) 40.0
 
Sept. 22, 2020, 7 p.m. 4.0 ppb (4) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 8.7 μg/m3 (36) 36.0
 
Sept. 22, 2020, 6 p.m. 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
Sept. 22, 2020, 5 p.m. 4.1 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 20.1 μg/m3 (67) 67.0
 
Sept. 22, 2020, 4 p.m. 17.3 ppb (16) 8.3 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 26.8 μg/m3 (81) 81.0
 
Sept. 22, 2020, 3 p.m. 36.4 ppb (34) 21.8 ppb (20) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 26.3 μg/m3 (80) 80.0
 
Sept. 22, 2020, 2 p.m. 26.4 ppb (24) 17.4 ppb (16) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 19.3 μg/m3 (66) 66.0
 
Sept. 22, 2020, 1 p.m. 3.9 ppb (4) 2.6 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 20.1 μg/m3 (67) 67.0
 
Sept. 22, 2020, noon 3.1 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 18.1 μg/m3 (63) 63.0
 
Sept. 22, 2020, 11 a.m. 0.5 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 16.3 μg/m3 (59) 59.0
 
Sept. 22, 2020, 10 a.m. 2.3 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Sept. 22, 2020, 9 a.m. 0.7 ppb (1) 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 21.2 μg/m3 (70) 70.0
 
Sept. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 22.5 μg/m3 (72) 72.0
 
Sept. 22, 2020, 7 a.m. 0.6 ppb (1) 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 22.4 μg/m3 (72) 72.0
 
Sept. 22, 2020, 6 a.m. 0.7 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 14.7 μg/m3 (56) 56.0
 
Sept. 22, 2020, 5 a.m. 0.6 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Sept. 22, 2020, 4 a.m. 1.5 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 14.5 μg/m3 (55) 55.0
 
Sept. 22, 2020, 3 a.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 11.2 μg/m3 (47) 47.0
 
Sept. 22, 2020, 2 a.m. 4.5 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 13.1 μg/m3 (52) 52.0
 
Sept. 22, 2020, 1 a.m. 8.3 ppb (8) 3.5 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 11.2 μg/m3 (47) 47.0
 
Sept. 22, 2020, midnight 3.7 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 14.8 μg/m3 (56) 56.0
 
Sept. 21, 2020, 11 p.m. 3.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.8 μg/m3 (32) 32.0
 
Sept. 21, 2020, 10 p.m. 2.9 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 8.1 μg/m3 (34) 34.0
 
Sept. 21, 2020, 9 p.m. 3.2 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 21, 2020, 8 p.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 10.7 μg/m3 (45) 45.0
 
Sept. 21, 2020, 7 p.m. 3.5 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 11.9 μg/m3 (50) 50.0
 
Sept. 21, 2020, 6 p.m. 3.9 ppb (4) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 11.3 μg/m3 (47) 47.0
 
Sept. 21, 2020, 5 p.m. 3.3 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 14.3 μg/m3 (55) 55.0
 
Sept. 21, 2020, 4 p.m. 4.2 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 12.6 μg/m3 (51) 51.0
 
Sept. 21, 2020, 3 p.m. 20.0 ppb (19) 14.0 ppb (13) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 18.1 μg/m3 (63) 63.0
 
Sept. 21, 2020, 2 p.m. 23.6 ppb (22) 16.8 ppb (16) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 18.9 μg/m3 (65) 65.0
 
Sept. 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.3 μg/m3 (61) 61.0
 
Sept. 21, 2020, noon 8.5 ppb (8) 6.6 ppb (6) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 19.8 μg/m3 (67) 67.0
 
Sept. 21, 2020, 11 a.m. 3.6 ppb (3) 2.5 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 22.2 μg/m3 (72) 72.0
 
Sept. 21, 2020, 10 a.m. 1.9 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 16.9 μg/m3 (60) 60.0
 
Sept. 21, 2020, 9 a.m. 0.2 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 18.6 μg/m3 (64) 64.0
 
Sept. 21, 2020, 8 a.m. 0.3 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 25.1 μg/m3 (78) 78.0
 
Sept. 21, 2020, 7 a.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 14.9 μg/m3 (56) 56.0
 
Sept. 21, 2020, 6 a.m. 1.0 ppb (1) 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 18.7 μg/m3 (64) 64.0
 
Sept. 21, 2020, 5 a.m. 1.9 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 11.7 μg/m3 (49) 49.0
 
Sept. 21, 2020, 4 a.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 6.5 μg/m3 (27) 27.0
 
Sept. 21, 2020, 3 a.m. 1.8 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 21, 2020, 2 a.m. 2.4 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.9 μg/m3 (25) 25.0
 
Sept. 21, 2020, 1 a.m. 4.9 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 4.5 μg/m3 (19) 19.0
 
Sept. 21, 2020, midnight 4.4 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 4.9 μg/m3 (20) 20.0
 
Sept. 20, 2020, 11 p.m. 2.8 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 20, 2020, 10 p.m. 2.6 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.9 μg/m3 (25) 25.0
 
Sept. 20, 2020, 9 p.m. 3.8 ppb (4) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
Sept. 20, 2020, 8 p.m. 4.4 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
Sept. 20, 2020, 7 p.m. 2.3 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 8.8 μg/m3 (37) 37.0
 
Sept. 20, 2020, 6 p.m. 3.9 ppb (4) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 6.3 μg/m3 (26) 26.0