AQSQID: 300310017

Site Name: West Yellowstone Park Ent #2

Location: Gallatin Co, MT

Reporting: True, Located: True

Current AQI: 4.0

Gallatin Co MT, US: 44.657014, -111.089618

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 18, 2019, 6 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 18, 2019, 5 p.m. 13.7 ppb (13) 6.0 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 4 p.m. 131.1 ppb (106) 105.2 ppb (101) N/A 26.0 ppb (24) N/A N/A N/A 0.56 ppb (6) N/A 3.0 μg/m3 (12) 106.0
 
Jan. 18, 2019, 3 p.m. 12.6 ppb (12) 8.2 ppb (8) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 12.0
 
Jan. 18, 2019, 2 p.m. 4.8 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
Jan. 18, 2019, 1 p.m. 11.6 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.21 ppb (2) N/A 1.0 μg/m3 (4) 11.0
 
Jan. 18, 2019, noon 6.6 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A -2.0 μg/m3 (0) 6.0
 
Jan. 18, 2019, 11 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, 10 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 9 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 7 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 18, 2019, 6 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, 5 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, 4 a.m. 0.2 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, 3 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, 2 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, 1 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 18, 2019, midnight 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 17, 2019, 11 p.m. 3.7 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 10 p.m. 3.0 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, 9 p.m. 1.1 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Jan. 17, 2019, 8 p.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 7 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 6 p.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Jan. 17, 2019, 5 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 4 p.m. 15.1 ppb (14) 6.3 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 14.0
 
Jan. 17, 2019, 3 p.m. 8.6 ppb (8) 4.1 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 8.0
 
Jan. 17, 2019, 2 p.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 1 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Jan. 17, 2019, noon 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, 11 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 17, 2019, 10 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, 7 a.m. 1.6 ppb (1) N/A N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A N/A 2.0
 
Jan. 16, 2019, 11 p.m. 4.1 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 10 p.m. 10.2 ppb (9) 6.0 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 9 p.m. 2.1 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 8 p.m. 2.8 ppb (3) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 7 p.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 16, 2019, 6 p.m. 6.4 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2019, 5 p.m. 20.3 ppb (19) 5.1 ppb (5) N/A 15.0 ppb (14) N/A N/A N/A 0.48 ppb (5) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 16, 2019, 4 p.m. 20.9 ppb (19) 7.5 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.4 ppb (4) N/A 3.0 μg/m3 (12) 19.0
 
Jan. 16, 2019, 3 p.m. 12.3 ppb (11) 5.1 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
Jan. 16, 2019, 2 p.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 1 p.m. 5.4 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2019, noon 6.3 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 16, 2019, 11 a.m. 6.9 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 10 a.m. 4.7 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 9 a.m. 5.3 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2019, 7 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 6 a.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2019, 4 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 3 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2019, 2 a.m. 8.6 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.31 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2019, 1 a.m. 6.3 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 6.0
 
Jan. 16, 2019, midnight 9.1 ppb (8) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.26 ppb (3) N/A 0.0 μg/m3 (0) 8.0
 
Jan. 15, 2019, 11 p.m. 16.7 ppb (15) 9.4 ppb (9) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 15.0
 
Jan. 15, 2019, 10 p.m. 7.5 ppb (7) 4.5 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 15, 2019, 9 p.m. 3.7 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 15, 2019, 8 p.m. 2.6 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 15, 2019, 7 p.m. 6.1 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 15, 2019, 6 p.m. 8.1 ppb (8) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 15, 2019, 5 p.m. 19.9 ppb (18) 7.5 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.41 ppb (5) N/A 0.0 μg/m3 (0) 18.0
 
Jan. 15, 2019, 4 p.m. 20.5 ppb (19) 10.1 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.37 ppb (4) N/A -4.0 μg/m3 (0) 19.0
 
Jan. 15, 2019, 3 p.m. 9.2 ppb (9) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A -3.0 μg/m3 (0) 9.0
 
Jan. 15, 2019, 2 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
Jan. 15, 2019, 1 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A -3.0 μg/m3 (0) 1.0
 
Jan. 15, 2019, noon 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 15, 2019, 11 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 0.0 μg/m3 (0) 1.0
 
Jan. 15, 2019, 10 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 0.0 μg/m3 (0) 1.0
 
Jan. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -4.0 μg/m3 (0) N/A
Jan. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 15, 2019, 7 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.1 ppb (1) N/A -4.0 μg/m3 (0) 1.0
 
Jan. 15, 2019, 6 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A -2.0 μg/m3 (0) 1.0
 
Jan. 15, 2019, 5 a.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 15, 2019, 4 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 15, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
Jan. 15, 2019, 2 a.m. 13.0 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.18 ppb (2) N/A N/A 12.0
 
Jan. 15, 2019, 1 a.m. 125.6 ppb (105) 87.6 ppb (86) N/A 38.0 ppb (35) N/A N/A N/A 0.31 ppb (3) N/A N/A 105.0
 
Jan. 15, 2019, midnight 169.6 ppb (113) 130.4 ppb (106) N/A 39.0 ppb (36) N/A N/A N/A 0.38 ppb (4) N/A N/A 113.0
 
Jan. 14, 2019, 11 p.m. 101.1 ppb (100) 74.0 ppb (71) N/A 27.0 ppb (25) N/A N/A N/A 0.42 ppb (5) N/A 0.0 μg/m3 (0) 100.0
 
Jan. 14, 2019, 10 p.m. 9.7 ppb (9) 6.0 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 14, 2019, 9 p.m. 2.5 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 14, 2019, 8 p.m. 1.8 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 7 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 6 p.m. 4.8 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 14, 2019, 5 p.m. 12.0 ppb (11) 4.9 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 1.0 μg/m3 (4) 11.0
 
Jan. 14, 2019, 4 p.m. 103.5 ppb (100) 81.9 ppb (80) N/A 22.0 ppb (20) N/A N/A N/A 0.69 ppb (8) N/A 0.0 μg/m3 (0) 100.0
 
Jan. 14, 2019, 3 p.m. 15.1 ppb (14) 4.2 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 14.0
 
Jan. 14, 2019, 2 p.m. 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 14, 2019, 1 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 14, 2019, noon 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 14, 2019, 11 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 0.0 μg/m3 (0) 1.0
 
Jan. 14, 2019, 10 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 14, 2019, 9 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A N/A 1.0
 
Jan. 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) N/A
Jan. 14, 2019, 7 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 14, 2019, 6 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 14, 2019, 5 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 14, 2019, 4 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 14, 2019, 3 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A -3.0 μg/m3 (0) 4.0
 
Jan. 14, 2019, 2 a.m. 21.4 ppb (20) 2.9 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.21 ppb (2) N/A -4.0 μg/m3 (0) 20.0
 
Jan. 14, 2019, 1 a.m. 42.3 ppb (39) 17.6 ppb (16) N/A 25.0 ppb (23) N/A N/A N/A 0.25 ppb (3) N/A -4.0 μg/m3 (0) 39.0
 
Jan. 14, 2019, midnight 13.3 ppb (12) 0.8 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A -4.0 μg/m3 (0) 12.0
 
Jan. 13, 2019, 11 p.m. 52.9 ppb (49) 35.4 ppb (33) N/A 17.0 ppb (16) N/A N/A N/A 0.35 ppb (4) N/A -1.0 μg/m3 (0) 49.0
 
Jan. 13, 2019, 10 p.m. 9.7 ppb (9) 5.0 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 13, 2019, 9 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 8 p.m. 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 13, 2019, 7 p.m. 1.0 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 6 p.m. 6.6 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 13, 2019, 5 p.m. 8.2 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A -3.0 μg/m3 (0) 8.0
 
Jan. 13, 2019, 4 p.m. 24.2 ppb (22) 14.3 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A 0.39 ppb (4) N/A -1.0 μg/m3 (0) 22.0
 
Jan. 13, 2019, 3 p.m. 7.4 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A -3.0 μg/m3 (0) 7.0
 
Jan. 13, 2019, 2 p.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A N/A 2.0
 
Jan. 13, 2019, 1 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A N/A 2.0
 
Jan. 13, 2019, noon 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
Jan. 13, 2019, 11 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 0.0 μg/m3 (0) 1.0
 
Jan. 13, 2019, 10 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A -1.0 μg/m3 (0) 1.0
 
Jan. 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -3.0 μg/m3 (0) N/A
Jan. 13, 2019, 8 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
Jan. 13, 2019, 7 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A -1.0 μg/m3 (0) 1.0
 
Jan. 13, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 13, 2019, 4 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
Jan. 13, 2019, 3 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
Jan. 13, 2019, 2 a.m. 11.1 ppb (10) 1.4 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.18 ppb (2) N/A -2.0 μg/m3 (0) 10.0
 
Jan. 13, 2019, 1 a.m. 87.2 ppb (85) 60.4 ppb (57) N/A 27.0 ppb (25) N/A N/A N/A 0.3 ppb (3) N/A -4.0 μg/m3 (0) 85.0
 
Jan. 13, 2019, midnight 21.3 ppb (20) 11.7 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A N/A 20.0
 
Jan. 12, 2019, 11 p.m. 72.2 ppb (69) 57.1 ppb (53) N/A 15.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A N/A 69.0
 
Jan. 12, 2019, 10 p.m. 7.4 ppb (7) 6.2 ppb (6) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -1.0 μg/m3 (0) 7.0
 
Jan. 12, 2019, 9 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 12, 2019, 8 p.m. 1.5 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2019, 7 p.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2019, 6 p.m. 0.9 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2019, 5 p.m. 7.7 ppb (7) 3.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, 4 p.m. 18.6 ppb (17) 8.3 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 17.0
 
Jan. 12, 2019, 3 p.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 12, 2019, 2 p.m. 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 12, 2019, 1 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, noon 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 11 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 9 a.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -4.0 μg/m3 (0) N/A
Jan. 12, 2019, 7 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 6 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 12, 2019, 5 a.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
Jan. 12, 2019, 4 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 3 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
Jan. 12, 2019, 2 a.m. 4.7 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) N/A 0.0 μg/m3 (0) 5.0
 
Jan. 12, 2019, 1 a.m. 26.7 ppb (25) 4.7 ppb (4) N/A 22.0 ppb (20) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 25.0
 
Jan. 12, 2019, midnight 62.7 ppb (59) 28.6 ppb (26) N/A 34.0 ppb (31) N/A N/A N/A 0.27 ppb (3) N/A N/A 59.0
 
Jan. 11, 2019, 11 p.m. 18.1 ppb (17) 13.0 ppb (12) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 17.0
 
Jan. 11, 2019, 10 p.m. 7.7 ppb (7) 5.7 ppb (5) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 11, 2019, 9 p.m. 1.0 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2019, 8 p.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 11, 2019, 7 p.m. 0.8 ppb (1) 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 11, 2019, 6 p.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
Jan. 11, 2019, 5 p.m. 4.2 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 11, 2019, 4 p.m. 39.8 ppb (37) 20.3 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 37.0
 
Jan. 11, 2019, 3 p.m. 7.0 ppb (6) 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 6.0
 
Jan. 11, 2019, 2 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 11, 2019, 1 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Jan. 11, 2019, noon 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A -2.0 μg/m3 (0) 2.0