ID: 2427

AQSQID: 300310017

Site Name: West Yellowstone Park Ent #2

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

Updated: July 3, 2020, 9:33 a.m.

Location: W Yellowstone (W Entrance Rd), MT

Reporting: True, Located: True

Current AQI: 12.0

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
July 3, 2020, 2 a.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.04 ppb (0) N/A 3.0 μg/m3 (12) 12.0
 
July 3, 2020, 1 a.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.03 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 3, 2020, midnight 2.5 ppb (2) 1.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.02 ppb (0) N/A 1.0 μg/m3 (4) 4.0
 
July 2, 2020, 11 p.m. 2.4 ppb (2) 1.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.01 ppb (0) N/A -3.0 μg/m3 (0) 2.0
 
July 2, 2020, 10 p.m. 3.5 ppb (3) 2.2 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.02 ppb (0) N/A -2.0 μg/m3 (0) 3.0
 
July 2, 2020, 9 p.m. 1.1 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.0 ppb (0) N/A 0.0 μg/m3 (0) 1.0
 
July 2, 2020, 8 p.m. 3.9 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.0 ppb (0) N/A 2.0 μg/m3 (8) 8.0
 
July 2, 2020, 7 p.m. 4.4 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
July 2, 2020, 6 p.m. 6.6 ppb (6) 3.9 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A -1.0 μg/m3 (0) 6.0
 
July 2, 2020, 5 p.m. 6.0 ppb (6) 3.7 ppb (3) 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
 
July 2, 2020, 4 p.m. 8.0 ppb (7) 4.7 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 2, 2020, 3 p.m. -3.4 ppb (0) -2.9 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
 
July 2, 2020, 2 p.m. -6.8 ppb (0) -6.3 ppb (0) N/A -1.0 ppb (0) N/A N/A N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 2, 2020, 1 p.m. -6.8 ppb (0) -6.3 ppb (0) N/A -1.0 ppb (0) N/A N/A N/A 0.24 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
July 2, 2020, noon -6.8 ppb (0) -6.3 ppb (0) N/A -1.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
July 2, 2020, 11 a.m. -5.2 ppb (0) -4.8 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
July 2, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
July 2, 2020, 9 a.m. 0.8 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
July 2, 2020, 8 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
July 2, 2020, 7 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
July 2, 2020, 6 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
July 2, 2020, 5 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 (2) N/A N/A 2.0
 
July 2, 2020, 4 a.m. 1.9 ppb (2) 0.6 ppb (1) 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
 
July 2, 2020, 3 a.m. 1.3 ppb (1) 0.5 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
 
July 2, 2020, 2 a.m. 1.1 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
July 2, 2020, 1 a.m. 0.8 ppb (1) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
July 2, 2020, midnight 2.1 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
July 1, 2020, 11 p.m. 7.9 ppb (7) 3.1 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A -2.0 μg/m3 (0) 7.0
 
July 1, 2020, 10 p.m. 3.1 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A N/A 3.0
 
July 1, 2020, 9 p.m. 4.3 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A N/A 4.0
 
July 1, 2020, 8 p.m. 0.8 ppb (1) 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A N/A 2.0
 
July 1, 2020, 7 p.m. 7.9 ppb (7) 4.8 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 7.0
 
July 1, 2020, 6 p.m. 3.8 ppb (4) 2.4 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A N/A 4.0
 
July 1, 2020, 5 p.m. 7.2 ppb (7) 4.8 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 1, 2020, 4 p.m. 8.9 ppb (8) 5.5 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 1, 2020, 3 p.m. 7.4 ppb (7) 5.0 ppb (5) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 7.0
 
July 1, 2020, 2 p.m. 4.1 ppb (4) 2.5 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
July 1, 2020, 1 p.m. 3.6 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A -1.0 μg/m3 (0) 3.0
 
July 1, 2020, noon 5.9 ppb (5) 3.2 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A -2.0 μg/m3 (0) 5.0
 
July 1, 2020, 11 a.m. 1.4 ppb (1) 0.6 ppb (1) 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
 
July 1, 2020, 10 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
July 1, 2020, 9 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 -3.0 μg/m3 (0) 2.0
 
July 1, 2020, 8 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
July 1, 2020, 7 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 (2) N/A -3.0 μg/m3 (0) 2.0
 
July 1, 2020, 6 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
July 1, 2020, 5 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
July 1, 2020, 4 a.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
July 1, 2020, 3 a.m. 0.8 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
July 1, 2020, 2 a.m. 1.6 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
July 1, 2020, 1 a.m. 2.2 ppb (2) 1.1 ppb (1) 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
 
July 1, 2020, midnight 2.6 ppb (2) 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 30, 2020, 11 p.m. 1.6 ppb (1) 1.1 ppb (1) 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
 
June 30, 2020, 10 p.m. 2.1 ppb (2) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 30, 2020, 9 p.m. 2.6 ppb (2) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A N/A 2.0
 
June 30, 2020, 8 p.m. 1.5 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A N/A 2.0
 
June 30, 2020, 7 p.m. 4.6 ppb (4) 3.4 ppb (3) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 4.0
 
June 30, 2020, 6 p.m. 8.5 ppb (8) 5.6 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 0.0 μg/m3 (0) 8.0
 
June 30, 2020, 5 p.m. 9.1 ppb (8) 6.3 ppb (6) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 8.0
 
June 30, 2020, 4 p.m. 6.5 ppb (6) 4.4 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A -3.0 μg/m3 (0) 6.0
 
June 30, 2020, 3 p.m. 7.5 ppb (7) 5.0 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 0.0 μg/m3 (0) 7.0
 
June 30, 2020, 2 p.m. 4.7 ppb (4) 3.1 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A -1.0 μg/m3 (0) 4.0
 
June 30, 2020, 1 p.m. 6.5 ppb (6) 4.5 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A -4.0 μg/m3 (0) 6.0
 
June 30, 2020, noon 8.6 ppb (8) 6.7 ppb (6) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 0.0 μg/m3 (0) 8.0
 
June 30, 2020, 11 a.m. 0.6 ppb (1) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 30, 2020, 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) N/A
June 30, 2020, 9 a.m. -0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.15 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 30, 2020, 8 a.m. -0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
June 30, 2020, 7 a.m. -0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.15 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 30, 2020, 6 a.m. 0.1 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A N/A 2.0
 
June 30, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
June 30, 2020, 4 a.m. 0.5 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.15 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
June 30, 2020, 3 a.m. 0.3 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 30, 2020, 2 a.m. 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A N/A 2.0
 
June 30, 2020, 1 a.m. 2.1 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A N/A 2.0
 
June 30, 2020, midnight 3.5 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A -3.0 μg/m3 (0) 3.0
 
June 29, 2020, 11 p.m. 2.5 ppb (2) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
June 29, 2020, 10 p.m. 3.3 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 3.0
 
June 29, 2020, 9 p.m. 2.4 ppb (2) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
June 29, 2020, 8 p.m. 8.5 ppb (8) 5.0 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 29, 2020, 7 p.m. 7.9 ppb (7) 5.1 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A 1.0 μg/m3 (4) 7.0
 
June 29, 2020, 6 p.m. 8.8 ppb (8) 5.8 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A -1.0 μg/m3 (0) 8.0
 
June 29, 2020, 5 p.m. 15.2 ppb (14) 9.9 ppb (9) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 14.0
 
June 29, 2020, 4 p.m. 12.5 ppb (12) 7.0 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A -4.0 μg/m3 (0) 12.0
 
June 29, 2020, 3 p.m. 2.4 ppb (2) 1.5 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
June 29, 2020, 2 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
June 29, 2020, 1 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 29, 2020, noon 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A N/A 2.0
 
June 29, 2020, 11 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 29, 2020, 10 a.m. 0.1 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
 
June 29, 2020, 9 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 (4) 4.0
 
June 29, 2020, 8 a.m. -0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 29, 2020, 7 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
June 29, 2020, 6 a.m. 0.0 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
 
June 29, 2020, 5 a.m. 0.1 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 (8) 8.0
 
June 29, 2020, 4 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 0.0 μg/m3 (0) 2.0
 
June 29, 2020, 3 a.m. 1.6 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
June 29, 2020, 2 a.m. 1.6 ppb (1) 0.5 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
 
June 29, 2020, 1 a.m. 2.5 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
June 29, 2020, midnight 2.8 ppb (3) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A -3.0 μg/m3 (0) 3.0
 
June 28, 2020, 11 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.29 ppb (3) N/A N/A 3.0
 
June 28, 2020, 10 p.m. 4.4 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A -2.0 μg/m3 (0) 4.0
 
June 28, 2020, 9 p.m. 5.5 ppb (5) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A -2.0 μg/m3 (0) 5.0
 
June 28, 2020, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 28, 2020, 7 p.m. 4.6 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 28, 2020, 6 p.m. 6.3 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 6.0
 
June 28, 2020, 5 p.m. 11.3 ppb (10) 6.0 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 10.0
 
June 28, 2020, 4 p.m. 13.4 ppb (12) 7.4 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 12.0
 
June 28, 2020, 3 p.m. 7.3 ppb (7) 3.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A -2.0 μg/m3 (0) 7.0
 
June 28, 2020, 2 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 -2.0 μg/m3 (0) 3.0
 
June 28, 2020, 1 p.m. 0.5 ppb (0) 0.1 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
 
June 28, 2020, noon 1.8 ppb (2) 0.5 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
 
June 28, 2020, 11 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
 
June 28, 2020, 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) N/A
June 28, 2020, 9 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 28, 2020, 8 a.m. 0.1 ppb (0) 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 (8) 8.0
 
June 28, 2020, 7 a.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 4.0 μg/m3 (17) 17.0
 
June 28, 2020, 6 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 8.0 μg/m3 (33) 33.0
 
June 28, 2020, 5 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 (2) N/A 4.0 μg/m3 (17) 17.0
 
June 28, 2020, 4 a.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A -3.0 μg/m3 (0) 3.0
 
June 28, 2020, 3 a.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
June 28, 2020, 2 a.m. 1.2 ppb (1) 0.0 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
 
June 28, 2020, 1 a.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.25 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
June 28, 2020, midnight 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 -2.0 μg/m3 (0) 3.0
 
June 27, 2020, 11 p.m. 3.2 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 27, 2020, 10 p.m. 3.8 ppb (4) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 27, 2020, 9 p.m. 3.4 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A -2.0 μg/m3 (0) 3.0
 
June 27, 2020, 8 p.m. 2.6 ppb (2) 1.6 ppb (1) 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
 
June 27, 2020, 7 p.m. 7.4 ppb (7) 4.4 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (3) N/A -1.0 μg/m3 (0) 7.0
 
June 27, 2020, 6 p.m. 5.8 ppb (5) 3.1 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 0.0 μg/m3 (0) 5.0
 
June 27, 2020, 5 p.m. 6.2 ppb (6) 3.4 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
June 27, 2020, 4 p.m. 9.5 ppb (9) 4.8 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
June 27, 2020, 3 p.m. 3.3 ppb (3) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 27, 2020, 2 p.m. 2.3 ppb (2) 1.0 ppb (1) 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
 
June 27, 2020, 1 p.m. 4.7 ppb (4) 2.8 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
June 27, 2020, noon 8.4 ppb (8) 7.2 ppb (7) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 27, 2020, 11 a.m. 2.4 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
June 27, 2020, 10 a.m. 1.0 ppb (1) 0.5 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
 
June 27, 2020, 9 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
June 27, 2020, 8 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 27, 2020, 7 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
June 27, 2020, 6 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
June 27, 2020, 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 (0) N/A
June 27, 2020, 4 a.m. 0.9 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 (8) 8.0
 
June 27, 2020, 3 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
June 27, 2020, 2 a.m. 2.1 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
June 27, 2020, 1 a.m. 3.0 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 27, 2020, midnight 4.2 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
June 26, 2020, 11 p.m. 2.3 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
June 26, 2020, 10 p.m. 3.5 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
June 26, 2020, 9 p.m. 3.2 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 26, 2020, 8 p.m. 2.2 ppb (2) 1.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
June 26, 2020, 7 p.m. 4.7 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.25 ppb (3) N/A -1.0 μg/m3 (0) 4.0
 
June 26, 2020, 6 p.m. 7.1 ppb (7) 4.1 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
June 26, 2020, 5 p.m. 6.5 ppb (6) 4.4 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 26, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
June 26, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
June 26, 2020, 2 p.m. 5.5 ppb (5) 3.7 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
June 26, 2020, 1 p.m. 2.7 ppb (3) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
June 26, 2020, noon 2.3 ppb (2) 1.8 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
June 26, 2020, 11 a.m. 0.2 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 26, 2020, 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) N/A
June 26, 2020, 9 a.m. 0.0 ppb (0) 0.1 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
 
June 26, 2020, 8 a.m. 0.0 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.21 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
June 26, 2020, 7 a.m. -0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.2 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
June 26, 2020, 6 a.m. 0.0 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
 
June 26, 2020, 5 a.m. 0.7 ppb (1) 0.4 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
 
June 26, 2020, 4 a.m. 2.7 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
June 26, 2020, 3 a.m. 2.5 ppb (2) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 1.0 μg/m3 (4) 4.0