AQSQID: 300310017

Site Name: West Yellowstone Park Ent #2

Location: W Yellowstone (W Entrance Rd), MT

Reporting: True, Located: True

Current AQI: 2.0

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
March 29, 2020, 7 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 29, 2020, 6 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 29, 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 (4) 4.0
 
March 29, 2020, 4 a.m. 0.3 ppb (0) 0.0 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
 
March 29, 2020, 3 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 29, 2020, 2 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A N/A 2.0
 
March 29, 2020, 1 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 (0) 2.0
 
March 29, 2020, midnight 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 0.0 μg/m3 (0) 2.0
 
March 28, 2020, 11 p.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 0.0 μg/m3 (0) 2.0
 
March 28, 2020, 10 p.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 (8) 8.0
 
March 28, 2020, 9 p.m. 0.1 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 (8) 8.0
 
March 28, 2020, 8 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
March 28, 2020, 7 p.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 3.0 μg/m3 (12) 12.0
 
March 28, 2020, 6 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 28, 2020, 5 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 28, 2020, 4 p.m. 0.4 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
 
March 28, 2020, 3 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 28, 2020, 2 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 28, 2020, 1 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 28, 2020, noon 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 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 0.19 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 28, 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
March 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 0.18 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
March 28, 2020, 8 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 28, 2020, 7 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 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 0.16 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 28, 2020, 5 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 28, 2020, 4 a.m. 0.1 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 (0) 2.0
 
March 28, 2020, 3 a.m. 0.0 ppb (0) 0.0 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
 
March 28, 2020, 2 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 N/A 2.0
 
March 28, 2020, 1 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 28, 2020, midnight 0.0 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 (0) 2.0
 
March 27, 2020, 11 p.m. 0.0 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 (0) 2.0
 
March 27, 2020, 10 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 27, 2020, 9 p.m. 2.6 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
March 27, 2020, 8 p.m. 9.1 ppb (8) 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 27, 2020, 7 p.m. 2.6 ppb (2) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 27, 2020, 6 p.m. 2.3 ppb (2) 1.7 ppb (2) 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
 
March 27, 2020, 5 p.m. 0.8 ppb (1) 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 27, 2020, 4 p.m. 1.5 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 27, 2020, 3 p.m. 4.1 ppb (4) 1.3 ppb (1) 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
 
March 27, 2020, 2 p.m. 2.8 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A -4.0 μg/m3 (0) 3.0
 
March 27, 2020, 1 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A N/A 2.0
 
March 27, 2020, noon 2.5 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A N/A 3.0
 
March 27, 2020, 11 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 27, 2020, 10 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A N/A 2.0
 
March 27, 2020, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 27, 2020, 8 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 27, 2020, 7 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 27, 2020, 6 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 27, 2020, 5 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
March 27, 2020, 4 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 -4.0 μg/m3 (0) 2.0
 
March 27, 2020, 3 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A N/A 2.0
 
March 27, 2020, 2 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 -3.0 μg/m3 (0) 2.0
 
March 27, 2020, 1 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 27, 2020, midnight 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A N/A 2.0
 
March 26, 2020, 11 p.m. 3.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 3.0
 
March 26, 2020, 10 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 26, 2020, 9 p.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 (8) 8.0
 
March 26, 2020, 8 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 26, 2020, 7 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 26, 2020, 6 p.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 3.0 μg/m3 (12) 12.0
 
March 26, 2020, 5 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 4 p.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 3 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 26, 2020, 2 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A -4.0 μg/m3 (0) 3.0
 
March 26, 2020, 1 p.m. 1.6 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.46 ppb (5) N/A N/A 5.0
 
March 26, 2020, noon 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 -4.0 μg/m3 (0) 2.0
 
March 26, 2020, 11 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 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
March 26, 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 -2.0 μg/m3 (0) 2.0
 
March 26, 2020, 8 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.15 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 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 0.17 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 26, 2020, 6 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 26, 2020, 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
 
March 26, 2020, 4 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 26, 2020, 3 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 26, 2020, 2 a.m. 0.2 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
 
March 26, 2020, 1 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 26, 2020, midnight 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 3.0 μg/m3 (12) 12.0
 
March 25, 2020, 11 p.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 4.0 μg/m3 (17) 17.0
 
March 25, 2020, 10 p.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
 
March 25, 2020, 9 p.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 N/A 2.0
 
March 25, 2020, 8 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 25, 2020, 7 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 25, 2020, 6 p.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 1.0 μg/m3 (4) 4.0
 
March 25, 2020, 5 p.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 2.0 μg/m3 (8) 8.0
 
March 25, 2020, 4 p.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 2.0 μg/m3 (8) 8.0
 
March 25, 2020, 3 p.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 4.0 μg/m3 (17) 17.0
 
March 25, 2020, 2 p.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 2.0 μg/m3 (8) 8.0
 
March 25, 2020, 1 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 25, 2020, noon 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 25, 2020, 11 a.m. 0.1 ppb (0) 0.0 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
 
March 25, 2020, 10 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 25, 2020, 9 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 25, 2020, 8 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 25, 2020, 7 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 25, 2020, 6 a.m. 0.4 ppb (0) 0.0 ppb (0) 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
 
March 25, 2020, 5 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
March 25, 2020, 4 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 -3.0 μg/m3 (0) 2.0
 
March 25, 2020, 3 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 -1.0 μg/m3 (0) 2.0
 
March 25, 2020, 2 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 25, 2020, 1 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 25, 2020, midnight 0.2 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 (17) 17.0
 
March 24, 2020, 11 p.m. 1.2 ppb (1) 0.2 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
 
March 24, 2020, 10 p.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 6.0 μg/m3 (25) 25.0
 
March 24, 2020, 9 p.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 24, 2020, 8 p.m. 3.2 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 24, 2020, 7 p.m. 0.3 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 (17) 17.0
 
March 24, 2020, 6 p.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 2.0 μg/m3 (8) 8.0
 
March 24, 2020, 5 p.m. 0.7 ppb (1) 0.2 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
 
March 24, 2020, 4 p.m. 0.8 ppb (1) 0.2 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
 
March 24, 2020, 3 p.m. 2.6 ppb (2) 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 24, 2020, 2 p.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 24, 2020, 1 p.m. 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 24, 2020, noon 0.4 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 (8) 8.0
 
March 24, 2020, 11 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
March 24, 2020, 10 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
March 24, 2020, 9 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 24, 2020, 8 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 24, 2020, 7 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 24, 2020, 6 a.m. 0.4 ppb (0) 0.0 ppb (0) 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
 
March 24, 2020, 5 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
March 24, 2020, 4 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -4.0 μg/m3 (0) 2.0
 
March 24, 2020, 3 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 24, 2020, 2 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 24, 2020, 1 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 24, 2020, midnight 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 23, 2020, 11 p.m. 0.4 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
 
March 23, 2020, 10 p.m. 0.5 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 (8) 8.0
 
March 23, 2020, 9 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2020, 8 p.m. 0.3 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 23, 2020, 7 p.m. 0.2 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 (8) 8.0
 
March 23, 2020, 6 p.m. 0.2 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 (12) 12.0
 
March 23, 2020, 5 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2020, 4 p.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2020, 3 p.m. 3.2 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2020, 2 p.m. 11.8 ppb (11) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A -3.0 μg/m3 (0) 11.0
 
March 23, 2020, 1 p.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 23, 2020, noon 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 23, 2020, 11 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 23, 2020, 10 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.16 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 23, 2020, 9 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 23, 2020, 8 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 23, 2020, 7 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 23, 2020, 6 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
March 23, 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
March 23, 2020, 4 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
March 23, 2020, 3 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A N/A 2.0
 
March 23, 2020, 2 a.m. 0.4 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
 
March 23, 2020, 1 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 23, 2020, midnight 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
March 22, 2020, 11 p.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 -3.0 μg/m3 (0) 2.0
 
March 22, 2020, 10 p.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 -2.0 μg/m3 (0) 2.0
 
March 22, 2020, 9 p.m. 0.3 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 (8) 8.0
 
March 22, 2020, 8 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 22, 2020, 7 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 22, 2020, 6 p.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
 
March 22, 2020, 5 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 22, 2020, 4 p.m. 0.3 ppb (0) 0.0 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
 
March 22, 2020, 3 p.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 -3.0 μg/m3 (0) 2.0
 
March 22, 2020, 2 p.m. 0.3 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
 
March 22, 2020, 1 p.m. 0.3 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
 
March 22, 2020, noon 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 22, 2020, 11 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.19 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 22, 2020, 10 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
March 22, 2020, 9 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
March 22, 2020, 8 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A -2.0 μg/m3 (0) 2.0