AQSQID: 560391013

Site Name: Yellowstone- Old Faithful Snow Lodge

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
Jan. 24, 2020, 6 a.m. 0.3 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.5 μg/m3 (0) 1.0
 
Jan. 24, 2020, 5 a.m. 0.5 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.1 μg/m3 (0) 1.0
 
Jan. 24, 2020, 4 a.m. 0.6 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 24, 2020, 3 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 1.0
 
Jan. 24, 2020, 2 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.3 μg/m3 (0) 1.0
 
Jan. 24, 2020, 1 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 1.6 μg/m3 (7) 7.0
 
Jan. 24, 2020, midnight 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 23, 2020, 11 p.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -1.2 μg/m3 (0) 2.0
 
Jan. 23, 2020, 10 p.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 0.8 μg/m3 (3) 3.0
 
Jan. 23, 2020, 9 p.m. 2.5 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 23, 2020, 8 p.m. 4.3 ppb (4) 2.5 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
Jan. 23, 2020, 7 p.m. 10.4 ppb (10) 5.7 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 10.0
 
Jan. 23, 2020, 6 p.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 -0.3 μg/m3 (0) 2.0
 
Jan. 23, 2020, 5 p.m. 3.8 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 4.0
 
Jan. 23, 2020, 4 p.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 3.0
 
Jan. 23, 2020, 3 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 0.4 μg/m3 (2) 3.0
 
Jan. 23, 2020, 2 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -0.7 μg/m3 (0) 2.0
 
Jan. 23, 2020, 1 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 0.8 μg/m3 (3) 3.0
 
Jan. 23, 2020, noon 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
Jan. 23, 2020, 11 a.m. 0.4 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 1.0
 
Jan. 23, 2020, 10 a.m. 0.6 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 23, 2020, 9 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 2.9 μg/m3 (12) 12.0
 
Jan. 23, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -0.9 μg/m3 (0) N/A
Jan. 23, 2020, 7 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 2.0
 
Jan. 23, 2020, 6 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 0.6 μg/m3 (2) 2.0
 
Jan. 23, 2020, 5 a.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 23, 2020, 4 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
Jan. 23, 2020, 3 a.m. 1.7 ppb (2) -0.1 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
 
Jan. 23, 2020, 2 a.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 1.0
 
Jan. 23, 2020, 1 a.m. 1.5 ppb (1) 0.0 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
 
Jan. 23, 2020, midnight 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
Jan. 22, 2020, 11 p.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.8 μg/m3 (12) 12.0
 
Jan. 22, 2020, 10 p.m. 1.4 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
Jan. 22, 2020, 9 p.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 1.9 μg/m3 (8) 8.0
 
Jan. 22, 2020, 8 p.m. 3.2 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 22, 2020, 7 p.m. 3.9 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 22, 2020, 6 p.m. 2.9 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 3.0
 
Jan. 22, 2020, 5 p.m. 3.0 ppb (3) 2.2 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 3.0
 
Jan. 22, 2020, 4 p.m. 1.9 ppb (2) 0.1 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
 
Jan. 22, 2020, 3 p.m. 5.7 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 22, 2020, 2 p.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
Jan. 22, 2020, 1 p.m. 0.6 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
Jan. 22, 2020, noon 0.6 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 22, 2020, 11 a.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.3 μg/m3 (0) 1.0
 
Jan. 22, 2020, 10 a.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 22, 2020, 9 a.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 3.8 μg/m3 (16) 16.0
 
Jan. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.3 μg/m3 (22) 22.0
 
Jan. 22, 2020, 7 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 -0.2 μg/m3 (0) 1.0
 
Jan. 22, 2020, 6 a.m. 1.0 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.7 μg/m3 (0) 1.0
 
Jan. 22, 2020, 5 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 1.0
 
Jan. 22, 2020, 4 a.m. 1.0 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 22, 2020, 3 a.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 22, 2020, 2 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 22, 2020, 1 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 22, 2020, midnight 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 21, 2020, 11 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 21, 2020, 10 p.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 21, 2020, 9 p.m. 3.9 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 21, 2020, 8 p.m. 4.5 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 4.0
 
Jan. 21, 2020, 7 p.m. 4.0 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 4.0
 
Jan. 21, 2020, 6 p.m. 5.0 ppb (5) 2.6 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 5.0
 
Jan. 21, 2020, 5 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.8 μg/m3 (0) 1.0
 
Jan. 21, 2020, 4 p.m. 3.2 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -1.7 μg/m3 (0) 3.0
 
Jan. 21, 2020, 3 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -3.1 μg/m3 (0) 1.0
 
Jan. 21, 2020, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.8 μg/m3 (0) 1.0
 
Jan. 21, 2020, 1 p.m. 0.6 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 21, 2020, noon -0.2 ppb (0) -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) N/A
Jan. 21, 2020, 11 a.m. -0.2 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A -3.3 μg/m3 (0) N/A
Jan. 21, 2020, 10 a.m. -0.1 ppb (0) -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A -3.8 μg/m3 (0) N/A
Jan. 21, 2020, 9 a.m. 0.5 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 21, 2020, 7 a.m. 0.2 ppb (0) -0.4 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
 
Jan. 21, 2020, 6 a.m. -0.1 ppb (0) -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 0.3 μg/m3 (1) 1.0
 
Jan. 21, 2020, 5 a.m. 1.1 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
Jan. 21, 2020, 4 a.m. 0.2 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 21, 2020, 3 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 1.9 μg/m3 (8) 8.0
 
Jan. 21, 2020, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
Jan. 21, 2020, 1 a.m. 2.6 ppb (2) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
Jan. 21, 2020, midnight 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 1.0
 
Jan. 20, 2020, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.1 μg/m3 (0) 1.0
 
Jan. 20, 2020, 10 p.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 0.1 μg/m3 (0) 1.0
 
Jan. 20, 2020, 9 p.m. 4.7 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 20, 2020, 8 p.m. 5.4 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 5.0
 
Jan. 20, 2020, 7 p.m. 8.1 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 8.0
 
Jan. 20, 2020, 6 p.m. 5.9 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.5 μg/m3 (0) 5.0
 
Jan. 20, 2020, 5 p.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 -0.8 μg/m3 (0) 3.0
 
Jan. 20, 2020, 4 p.m. 5.5 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.8 μg/m3 (3) 5.0
 
Jan. 20, 2020, 3 p.m. 5.8 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 5.0
 
Jan. 20, 2020, 2 p.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 -1.2 μg/m3 (0) 1.0
 
Jan. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) N/A
Jan. 20, 2020, noon -0.3 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A -0.3 μg/m3 (0) N/A
Jan. 20, 2020, 11 a.m. -0.3 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 20, 2020, 10 a.m. -0.1 ppb (0) -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 20, 2020, 9 a.m. -0.4 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
Jan. 20, 2020, 7 a.m. -0.2 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) N/A
Jan. 20, 2020, 6 a.m. 0.3 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.8 μg/m3 (3) 3.0
 
Jan. 20, 2020, 5 a.m. 0.0 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 20, 2020, 4 a.m. 0.1 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -2.9 μg/m3 (0) 1.0
 
Jan. 20, 2020, 3 a.m. 0.2 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -2.5 μg/m3 (0) 1.0
 
Jan. 20, 2020, 2 a.m. 0.4 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.3 μg/m3 (5) 5.0
 
Jan. 20, 2020, 1 a.m. 0.2 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
Jan. 20, 2020, midnight 0.2 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 19, 2020, 11 p.m. 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 19, 2020, 10 p.m. 0.5 ppb (0) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.3 μg/m3 (0) 1.0
 
Jan. 19, 2020, 9 p.m. 3.2 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 3.0
 
Jan. 19, 2020, 8 p.m. 8.7 ppb (8) 4.8 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 8.0
 
Jan. 19, 2020, 7 p.m. 7.9 ppb (7) 6.3 ppb (6) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -3.3 μg/m3 (0) 7.0
 
Jan. 19, 2020, 6 p.m. 3.1 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -2.3 μg/m3 (0) 3.0
 
Jan. 19, 2020, 5 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 0.6 μg/m3 (2) 2.0
 
Jan. 19, 2020, 4 p.m. 3.5 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 3.0
 
Jan. 19, 2020, 3 p.m. 7.3 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Jan. 19, 2020, 2 p.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 -0.5 μg/m3 (0) 1.0
 
Jan. 19, 2020, 1 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 2.0
 
Jan. 19, 2020, noon 0.1 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 1.0
 
Jan. 19, 2020, 11 a.m. 0.1 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -3.3 μg/m3 (0) 1.0
 
Jan. 19, 2020, 10 a.m. 0.1 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.8 μg/m3 (0) 1.0
 
Jan. 19, 2020, 9 a.m. 0.3 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 19, 2020, 8 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
 
Jan. 19, 2020, 7 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 1.0
 
Jan. 19, 2020, 6 a.m. 0.3 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.3 μg/m3 (0) 1.0
 
Jan. 19, 2020, 5 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -0.5 μg/m3 (0) 1.0
 
Jan. 19, 2020, 4 a.m. 0.5 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 19, 2020, 3 a.m. 0.8 ppb (1) 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A -0.3 μg/m3 (0) 1.0
 
Jan. 19, 2020, 2 a.m. 1.0 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 1.0
 
Jan. 19, 2020, 1 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 19, 2020, midnight 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
Jan. 18, 2020, 11 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
Jan. 18, 2020, 10 p.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 0.2 μg/m3 (1) 1.0
 
Jan. 18, 2020, 9 p.m. 3.4 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
Jan. 18, 2020, 8 p.m. 6.8 ppb (6) 4.1 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 3.9 μg/m3 (16) 16.0
 
Jan. 18, 2020, 7 p.m. 6.0 ppb (6) 4.2 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -0.7 μg/m3 (0) 6.0
 
Jan. 18, 2020, 6 p.m. 4.6 ppb (4) 3.0 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 4.0
 
Jan. 18, 2020, 5 p.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 0.1 μg/m3 (0) 1.0
 
Jan. 18, 2020, 4 p.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 0.1 μg/m3 (0) 2.0
 
Jan. 18, 2020, 3 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
Jan. 18, 2020, 2 p.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 0.4 μg/m3 (2) 2.0
 
Jan. 18, 2020, 1 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Jan. 18, 2020, noon 0.8 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.9 μg/m3 (12) 12.0
 
Jan. 18, 2020, 11 a.m. 0.4 ppb (0) -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
 
Jan. 18, 2020, 10 a.m. 0.1 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A -1.5 μg/m3 (0) 1.0
 
Jan. 18, 2020, 9 a.m. 0.5 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 1.0
 
Jan. 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
Jan. 18, 2020, 7 a.m. 0.0 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.3 μg/m3 (5) 5.0
 
Jan. 18, 2020, 6 a.m. 0.1 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
Jan. 18, 2020, 5 a.m. 0.5 ppb (0) -0.4 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
 
Jan. 18, 2020, 4 a.m. 0.4 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Jan. 18, 2020, 3 a.m. 1.1 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
Jan. 18, 2020, 2 a.m. 1.4 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 18, 2020, 1 a.m. 0.6 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 (0) 1.0
 
Jan. 18, 2020, midnight 0.9 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.6 μg/m3 (2) 2.0
 
Jan. 17, 2020, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Jan. 17, 2020, 10 p.m. 0.2 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 17, 2020, 9 p.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 1.9 μg/m3 (8) 8.0
 
Jan. 17, 2020, 8 p.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
Jan. 17, 2020, 7 p.m. 7.9 ppb (7) 4.3 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
Jan. 17, 2020, 6 p.m. 6.7 ppb (6) 3.8 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
Jan. 17, 2020, 5 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Jan. 17, 2020, 4 p.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 -0.2 μg/m3 (0) 1.0
 
Jan. 17, 2020, 3 p.m. 3.9 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.8 μg/m3 (8) 8.0
 
Jan. 17, 2020, 2 p.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 3.1 μg/m3 (13) 13.0
 
Jan. 17, 2020, 1 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
Jan. 17, 2020, noon 0.6 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.2 μg/m3 (1) 1.0
 
Jan. 17, 2020, 11 a.m. 0.5 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 1.0
 
Jan. 17, 2020, 10 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 0.4 μg/m3 (2) 2.0
 
Jan. 17, 2020, 9 a.m. 0.5 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 4.6 μg/m3 (19) 19.0
 
Jan. 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 17, 2020, 7 a.m. 0.5 ppb (0) -0.2 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