ID: 2427

AQSQID: 300310017

Site Name: West Yellowstone Park Ent #2

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

Updated: Sept. 22, 2020, 12:39 a.m.

Location: W Yellowstone (W Entrance Rd), MT

Reporting: True, Located: True

Current AQI: 33.0

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
Sept. 21, 2020, 11 p.m. 2.3 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 21, 2020, 10 p.m. 4.0 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 21, 2020, 9 p.m. 2.3 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 21, 2020, 8 p.m. 2.4 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 7 p.m. 3.7 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.37 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
Sept. 21, 2020, 6 p.m. 3.3 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.4 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 5 p.m. 3.1 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 21, 2020, 4 p.m. 5.2 ppb (5) 3.0 ppb (3) 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
 
Sept. 21, 2020, 3 p.m. 8.5 ppb (8) 5.1 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.39 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, 2 p.m. 24.9 ppb (23) 21.0 ppb (19) N/A 4.0 ppb (4) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 23.0
 
Sept. 21, 2020, 1 p.m. 17.8 ppb (16) 15.2 ppb (14) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (8) 16.0
 
Sept. 21, 2020, noon 12.5 ppb (12) 9.9 ppb (9) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 21, 2020, 11 a.m. 3.7 ppb (3) 2.8 ppb (3) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Sept. 21, 2020, 10 a.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Sept. 21, 2020, 9 a.m. 2.0 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Sept. 21, 2020, 8 a.m. 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.27 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Sept. 21, 2020, 7 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A -1.0 μg/m3 (0) 4.0
 
Sept. 21, 2020, 6 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A -1.0 μg/m3 (0) 4.0
 
Sept. 21, 2020, 5 a.m. 2.2 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 21, 2020, 4 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, 3 a.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 21, 2020, 2 a.m. 5.4 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 21, 2020, 1 a.m. 5.7 ppb (5) 2.5 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 21, 2020, midnight 2.5 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2020, 11 p.m. 2.6 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 20, 2020, 10 p.m. 3.7 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 20, 2020, 9 p.m. 2.1 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.36 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 20, 2020, 8 p.m. 3.3 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2020, 7 p.m. 2.0 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 6 p.m. 2.5 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.36 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2020, 5 p.m. 9.3 ppb (9) 5.2 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 4 p.m. 4.9 ppb (5) 2.7 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.37 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 3 p.m. 3.2 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.37 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 20, 2020, 2 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.33 ppb (4) N/A -3.0 μg/m3 (0) 4.0
 
Sept. 20, 2020, 1 p.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A -3.0 μg/m3 (0) 4.0
 
Sept. 20, 2020, noon 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A -4.0 μg/m3 (0) 4.0
 
Sept. 20, 2020, 11 a.m. 1.2 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.33 ppb (4) N/A -1.0 μg/m3 (0) 4.0
 
Sept. 20, 2020, 10 a.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
Sept. 20, 2020, 9 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 20, 2020, 8 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 20, 2020, 7 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 20, 2020, 6 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.29 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
Sept. 20, 2020, 5 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.29 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
Sept. 20, 2020, 4 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.29 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 20, 2020, 3 a.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.29 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 20, 2020, 2 a.m. 4.7 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 0.0 μg/m3 (0) 4.0
 
Sept. 20, 2020, 1 a.m. 3.9 ppb (4) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 20, 2020, midnight 4.3 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 19, 2020, 11 p.m. 2.6 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Sept. 19, 2020, 10 p.m. 2.3 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Sept. 19, 2020, 9 p.m. 2.5 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 8 p.m. 3.7 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2020, 7 p.m. 4.4 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 6 p.m. 3.6 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.38 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 5 p.m. 6.5 ppb (6) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 19, 2020, 4 p.m. 9.1 ppb (8) 4.2 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 1.0 μg/m3 (4) 8.0
 
Sept. 19, 2020, 3 p.m. 4.8 ppb (4) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 19, 2020, 2 p.m. 2.6 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 1 p.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 19, 2020, noon 1.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.42 ppb (5) N/A 24.0 μg/m3 (76) 76.0
 
Sept. 19, 2020, 11 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.43 ppb (5) N/A 31.0 μg/m3 (90) 90.0
 
Sept. 19, 2020, 10 a.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.38 ppb (4) N/A 27.0 μg/m3 (82) 82.0
 
Sept. 19, 2020, 9 a.m. 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 8 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2020, 7 a.m. 2.5 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 6 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 5 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
 
Sept. 19, 2020, 4 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2020, 3 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 19, 2020, 2 a.m. 12.7 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.39 ppb (4) N/A 31.0 μg/m3 (90) 90.0
 
Sept. 19, 2020, 1 a.m. 8.9 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 19, 2020, midnight 6.6 ppb (6) 2.4 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 22.0 μg/m3 (71) 71.0
 
Sept. 18, 2020, 11 p.m. 4.0 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 18, 2020, 10 p.m. 4.7 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 18, 2020, 9 p.m. 4.1 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2020, 8 p.m. 3.4 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 18, 2020, 7 p.m. 7.0 ppb (6) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.56 ppb (6) N/A 48.0 μg/m3 (131) 131.0
 
Sept. 18, 2020, 6 p.m. 7.4 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.55 ppb (6) N/A 43.0 μg/m3 (119) 119.0
 
Sept. 18, 2020, 5 p.m. 13.2 ppb (12) 5.1 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.55 ppb (6) N/A 42.0 μg/m3 (116) 116.0
 
Sept. 18, 2020, 4 p.m. 15.0 ppb (14) 5.6 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.54 ppb (6) N/A 41.0 μg/m3 (114) 114.0
 
Sept. 18, 2020, 3 p.m. 10.4 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.45 ppb (5) N/A 28.0 μg/m3 (84) 84.0
 
Sept. 18, 2020, 2 p.m. 41.9 ppb (39) 25.9 ppb (24) N/A 16.0 ppb (15) N/A N/A N/A 0.45 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 18, 2020, 1 p.m. 28.7 ppb (27) 16.2 ppb (15) N/A 13.0 ppb (12) N/A N/A N/A 0.37 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 18, 2020, noon 13.3 ppb (12) 3.7 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.31 ppb (3) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 18, 2020, 11 a.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Sept. 18, 2020, 9 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 18, 2020, 8 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 18, 2020, 7 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 20.0 μg/m3 (67) 67.0
 
Sept. 18, 2020, 6 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 20.0 μg/m3 (67) 67.0
 
Sept. 18, 2020, 5 a.m. 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 18, 2020, 4 a.m. 5.4 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 18, 2020, 3 a.m. 4.9 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.37 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 18, 2020, 2 a.m. 14.4 ppb (13) 2.3 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.41 ppb (5) N/A 24.0 μg/m3 (76) 76.0
 
Sept. 18, 2020, 1 a.m. 9.5 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 28.0 μg/m3 (84) 84.0
 
Sept. 18, 2020, midnight 7.5 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 26.0 μg/m3 (80) 80.0
 
Sept. 17, 2020, 11 p.m. 2.9 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 31.0 μg/m3 (90) 90.0
 
Sept. 17, 2020, 10 p.m. 2.6 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 28.0 μg/m3 (84) 84.0
 
Sept. 17, 2020, 9 p.m. 3.2 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.35 ppb (4) N/A 33.0 μg/m3 (95) 95.0
 
Sept. 17, 2020, 8 p.m. 3.2 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (4) N/A 27.0 μg/m3 (82) 82.0
 
Sept. 17, 2020, 7 p.m. 3.7 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.53 ppb (6) N/A 40.0 μg/m3 (111) 111.0
 
Sept. 17, 2020, 6 p.m. 5.5 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.67 ppb (7) N/A 66.0 μg/m3 (156) 156.0
 
Sept. 17, 2020, 5 p.m. 5.3 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.72 ppb (8) N/A 76.0 μg/m3 (161) 161.0
 
Sept. 17, 2020, 4 p.m. 12.0 ppb (11) 3.6 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.66 ppb (7) N/A 65.0 μg/m3 (155) 155.0
 
Sept. 17, 2020, 3 p.m. 10.4 ppb (10) 3.7 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.61 ppb (7) N/A 56.0 μg/m3 (150) 150.0
 
Sept. 17, 2020, 2 p.m. 31.0 ppb (29) 14.6 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A 0.67 ppb (7) N/A 46.0 μg/m3 (126) 126.0
 
Sept. 17, 2020, 1 p.m. 33.4 ppb (31) 11.9 ppb (11) N/A 21.0 ppb (19) N/A N/A N/A 0.78 ppb (9) N/A 47.0 μg/m3 (129) 129.0
 
Sept. 17, 2020, noon 16.7 ppb (15) 4.7 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.58 ppb (6) N/A 49.0 μg/m3 (134) 134.0
 
Sept. 17, 2020, 11 a.m. 8.4 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 46.0 μg/m3 (126) 126.0
 
Sept. 17, 2020, 10 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.5 ppb (6) N/A 54.0 μg/m3 (146) 146.0
 
Sept. 17, 2020, 9 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.52 ppb (6) N/A 54.0 μg/m3 (146) 146.0
 
Sept. 17, 2020, 8 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.53 ppb (6) N/A 58.0 μg/m3 (151) 151.0
 
Sept. 17, 2020, 7 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.54 ppb (6) N/A 56.0 μg/m3 (150) 150.0
 
Sept. 17, 2020, 6 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.56 ppb (6) N/A 45.0 μg/m3 (124) 124.0
 
Sept. 17, 2020, 5 a.m. 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.61 ppb (7) N/A 54.0 μg/m3 (146) 146.0
 
Sept. 17, 2020, 4 a.m. 3.7 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.63 ppb (7) N/A 60.0 μg/m3 (152) 152.0
 
Sept. 17, 2020, 3 a.m. 5.2 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.63 ppb (7) N/A 65.0 μg/m3 (155) 155.0
 
Sept. 17, 2020, 2 a.m. 5.8 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.61 ppb (7) N/A 56.0 μg/m3 (150) 150.0
 
Sept. 17, 2020, 1 a.m. 4.6 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.61 ppb (7) N/A 57.0 μg/m3 (151) 151.0
 
Sept. 17, 2020, midnight 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.58 ppb (6) N/A 63.0 μg/m3 (154) 154.0
 
Sept. 16, 2020, 11 p.m. 2.8 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.52 ppb (6) N/A 53.0 μg/m3 (144) 144.0
 
Sept. 16, 2020, 10 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.47 ppb (5) N/A 43.0 μg/m3 (119) 119.0
 
Sept. 16, 2020, 9 p.m. 3.3 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.52 ppb (6) N/A 50.0 μg/m3 (136) 136.0
 
Sept. 16, 2020, 8 p.m. 3.7 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.44 ppb (5) N/A 40.0 μg/m3 (111) 111.0
 
Sept. 16, 2020, 7 p.m. 3.4 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.41 ppb (5) N/A 43.0 μg/m3 (119) 119.0
 
Sept. 16, 2020, 6 p.m. 4.3 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.51 ppb (6) N/A 42.0 μg/m3 (116) 116.0
 
Sept. 16, 2020, 5 p.m. 3.2 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.57 ppb (6) N/A 56.0 μg/m3 (150) 150.0
 
Sept. 16, 2020, 4 p.m. 10.1 ppb (9) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.55 ppb (6) N/A 40.0 μg/m3 (111) 111.0
 
Sept. 16, 2020, 3 p.m. 5.9 ppb (5) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.47 ppb (5) N/A 37.0 μg/m3 (104) 104.0
 
Sept. 16, 2020, 2 p.m. 39.7 ppb (37) 24.2 ppb (22) N/A 16.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 31.0 μg/m3 (90) 90.0
 
Sept. 16, 2020, 1 p.m. 34.8 ppb (32) 18.7 ppb (17) N/A 16.0 ppb (15) N/A N/A N/A 0.48 ppb (5) N/A 27.0 μg/m3 (82) 82.0
 
Sept. 16, 2020, noon 16.8 ppb (16) 5.9 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 16, 2020, 11 a.m. 5.7 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 16, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Sept. 16, 2020, 9 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 16, 2020, 8 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.26 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 16, 2020, 7 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 16, 2020, 6 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2020, 3 a.m. 22.7 ppb (21) 10.6 ppb (10) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A 20.0 μg/m3 (67) 67.0
 
Sept. 16, 2020, 2 a.m. 5.6 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 16, 2020, 1 a.m. 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 16, 2020, midnight 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2020, 11 p.m. 2.9 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 15, 2020, 10 p.m. 3.8 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 24.0 μg/m3 (76) 76.0
 
Sept. 15, 2020, 9 p.m. 4.1 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.34 ppb (4) N/A 25.0 μg/m3 (78) 78.0
 
Sept. 15, 2020, 8 p.m. 4.7 ppb (4) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 25.0 μg/m3 (78) 78.0
 
Sept. 15, 2020, 7 p.m. 3.4 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 15, 2020, 6 p.m. 3.6 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 26.0 μg/m3 (80) 80.0
 
Sept. 15, 2020, 5 p.m. 7.9 ppb (7) 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
Sept. 15, 2020, 4 p.m. 5.9 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 22.0 μg/m3 (71) 71.0
 
Sept. 15, 2020, 3 p.m. 13.7 ppb (13) 6.3 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 15, 2020, 2 p.m. 43.5 ppb (40) 25.3 ppb (23) N/A 18.0 ppb (17) N/A N/A N/A 0.48 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 15, 2020, 1 p.m. 28.9 ppb (27) 14.6 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 15, 2020, noon 21.4 ppb (20) 8.9 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2020, 11 a.m. 5.0 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 15, 2020, 10 a.m. 1.2 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2020, 9 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2020, 8 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 15, 2020, 7 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 15, 2020, 6 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 15, 2020, 5 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 15, 2020, 4 a.m. 1.7 ppb (2) 0.1 ppb (0) 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
 
Sept. 15, 2020, 3 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2020, 2 a.m. 5.6 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 15, 2020, 1 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 15, 2020, midnight 5.0 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 14, 2020, 11 p.m. 4.2 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 14, 2020, 10 p.m. 3.4 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0