ID: 2427

AQSQID: 300310017

Site Name: West Yellowstone Park Ent #2

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

Updated: Feb. 26, 2021, 3:32 p.m.

Location: W Yellowstone (W Entrance Rd), MT

Reporting: True, Located: True

Current AQI: 3.0

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
Feb. 26, 2021, 2 p.m. 1.2 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 26, 2021, 1 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 26, 2021, noon 0.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 26, 2021, 11 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 26, 2021, 10 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 26, 2021, 9 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 26, 2021, 8 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 26, 2021, 7 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 26, 2021, 6 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 26, 2021, 5 a.m. 0.8 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 (13) 13.0
 
Feb. 26, 2021, 4 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 26, 2021, 3 a.m. 1.0 ppb (1) 0.0 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
 
Feb. 26, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 26, 2021, 1 a.m. 1.2 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 26, 2021, midnight 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
 
Feb. 25, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Feb. 25, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Feb. 25, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Feb. 25, 2021, 8 p.m. 1.4 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 25, 2021, 7 p.m. 1.2 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 25, 2021, 6 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 25, 2021, 5 p.m. 6.3 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 25, 2021, 4 p.m. 18.4 ppb (18) 7.2 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.51 ppb (6) N/A 4.0 μg/m3 (17) 18.0
 
Feb. 25, 2021, 3 p.m. 45.7 ppb (44) 28.6 ppb (27) N/A 17.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (13) 44.0
 
Feb. 25, 2021, 2 p.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 25, 2021, 1 p.m. 0.2 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 25, 2021, noon 0.0 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 25, 2021, 11 a.m. 0.8 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 25, 2021, 10 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) 0.0
Feb. 25, 2021, 9 a.m. 0.1 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 25, 2021, 8 a.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 25, 2021, 7 a.m. 0.0 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 25, 2021, 6 a.m. 0.3 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 25, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Feb. 25, 2021, 4 a.m. 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 25, 2021, 3 a.m. 2.5 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 25, 2021, 2 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 25, 2021, 1 a.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
 
Feb. 25, 2021, midnight 0.1 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 24, 2021, 11 p.m. 22.9 ppb (22) 19.7 ppb (19) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (4) N/A 0.0 μg/m3 (0) 22.0
 
Feb. 24, 2021, 10 p.m. 3.2 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 24, 2021, 9 p.m. 0.2 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 24, 2021, 8 p.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 24, 2021, 7 p.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 24, 2021, 6 p.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 24, 2021, 5 p.m. 3.6 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (4) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 24, 2021, 4 p.m. 14.6 ppb (14) 5.7 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.39 ppb (5) N/A 1.0 μg/m3 (5) 14.0
 
Feb. 24, 2021, 3 p.m. 7.0 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (4) N/A -1.0 μg/m3 (0) 7.0
 
Feb. 24, 2021, 2 p.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, 1 p.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, noon 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 4.0
 
Feb. 24, 2021, 11 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, 10 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, 9 a.m. 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, 8 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, 7 a.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 24, 2021, 6 a.m. 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 24, 2021, 5 a.m. 0.1 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 24, 2021, 4 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 0.0 μg/m3 (0) 3.0
 
Feb. 24, 2021, 3 a.m. 0.9 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
 
Feb. 24, 2021, 2 a.m. 0.1 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 24, 2021, 1 a.m. 3.6 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 24, 2021, midnight 0.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 11 p.m. 4.9 ppb (5) 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 (0) 5.0
 
Feb. 23, 2021, 10 p.m. 5.4 ppb (6) 4.2 ppb (4) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A -1.0 μg/m3 (0) 6.0
 
Feb. 23, 2021, 9 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Feb. 23, 2021, 8 p.m. 0.6 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 23, 2021, 7 p.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 23, 2021, 6 p.m. 1.2 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 23, 2021, 5 p.m. 1.0 ppb (1) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 4 p.m. 2.2 ppb (3) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 3 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 23, 2021, 2 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 23, 2021, 1 p.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, noon 0.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 23, 2021, 11 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 23, 2021, 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 (9) 9.0
 
Feb. 23, 2021, 9 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 23, 2021, 8 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 7 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 23, 2021, 6 a.m. 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 5 a.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 23, 2021, 4 a.m. 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 3 a.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 23, 2021, 2 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 23, 2021, 1 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 23, 2021, midnight 1.2 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 22, 2021, 11 p.m. 1.5 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 8 p.m. 0.9 ppb (1) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 7 p.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Feb. 22, 2021, 6 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 22, 2021, 5 p.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 4 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (4) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 22, 2021, 3 p.m. 0.8 ppb (1) 0.2 ppb (1) 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
 
Feb. 22, 2021, 2 p.m. 0.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 22, 2021, 1 p.m. 0.2 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, noon 0.3 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 22, 2021, 11 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 22, 2021, 10 a.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 22, 2021, 9 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 22, 2021, 8 a.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 22, 2021, 7 a.m. 0.3 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 6 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Feb. 22, 2021, 4 a.m. 0.3 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 3 a.m. 0.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 2 a.m. 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 22, 2021, 1 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 22, 2021, midnight 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 21, 2021, 11 p.m. 7.1 ppb (7) 3.3 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 21, 2021, 10 p.m. 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 21, 2021, 9 p.m. 0.9 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 21, 2021, 8 p.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 21, 2021, 7 p.m. 1.0 ppb (1) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 21, 2021, 6 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 21, 2021, 5 p.m. 0.5 ppb (1) 0.1 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 4 p.m. 2.6 ppb (3) 1.3 ppb (2) 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
 
Feb. 21, 2021, 3 p.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 2 p.m. 0.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 1 p.m. 0.2 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, noon 0.0 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 11 a.m. 0.1 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 21, 2021, 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 (9) 9.0
 
Feb. 21, 2021, 9 a.m. 0.0 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 8 a.m. 0.0 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 7 a.m. 0.0 ppb (0) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 21, 2021, 6 a.m. 0.1 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 21, 2021, 5 a.m. 0.3 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 21, 2021, 4 a.m. 0.1 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 21, 2021, 3 a.m. 0.1 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 21, 2021, 2 a.m. 0.2 ppb (1) -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 21, 2021, 1 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 21, 2021, midnight 2.0 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 20, 2021, 11 p.m. 20.8 ppb (20) 12.3 ppb (12) N/A 8.0 ppb (8) N/A N/A N/A 0.27 ppb (4) N/A 1.0 μg/m3 (5) 20.0
 
Feb. 20, 2021, 10 p.m. 12.5 ppb (12) 8.3 ppb (8) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 20, 2021, 9 p.m. 0.3 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 20, 2021, 8 p.m. 0.4 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 20, 2021, 7 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 20, 2021, 6 p.m. 0.8 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 20, 2021, 5 p.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 20, 2021, 4 p.m. 21.4 ppb (21) 8.5 ppb (9) N/A 13.0 ppb (13) N/A N/A N/A 0.82 ppb (10) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 20, 2021, 3 p.m. 7.7 ppb (8) 1.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 20, 2021, 2 p.m. 3.7 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.45 ppb (6) N/A 0.0 μg/m3 (0) 6.0
 
Feb. 20, 2021, 1 p.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (4) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 20, 2021, noon 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 20, 2021, 11 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 20, 2021, 10 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Feb. 20, 2021, 9 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
Feb. 20, 2021, 8 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Feb. 20, 2021, 7 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 20, 2021, 6 a.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 20, 2021, 5 a.m. 1.3 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 20, 2021, 4 a.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 20, 2021, 3 a.m. 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Feb. 20, 2021, 2 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 20, 2021, 1 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 20, 2021, midnight 1.6 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 19, 2021, 11 p.m. 7.0 ppb (7) 3.8 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (5) 7.0
 
Feb. 19, 2021, 10 p.m. 5.3 ppb (5) 2.2 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Feb. 19, 2021, 9 p.m. 0.7 ppb (1) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 19, 2021, 8 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Feb. 19, 2021, 7 p.m. 0.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
Feb. 19, 2021, 6 p.m. 1.1 ppb (2) 0.3 ppb (1) 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
 
Feb. 19, 2021, 5 p.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 -1.0 μg/m3 (0) 3.0
 
Feb. 19, 2021, 4 p.m. 4.5 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 0.0 μg/m3 (0) 5.0
 
Feb. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 5.0