AQSQID: 560210100

Site Name: Cheyenne Ncore

Location: Cheyenne (Chief Washwick Ave), WY

Reporting: True, Located: True

Current AQI: 23.0

Cheyenne (Chief Washwick Ave) WY, US: 41.18222, -104.778336

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 30, 2020, 7 a.m. 6.4 ppb (6) -0.1 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.14 ppb (2) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 23.0
 
March 30, 2020, 6 a.m. 3.4 ppb (3) -0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 25.0
 
March 30, 2020, 5 a.m. 3.4 ppb (3) -0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) -4.0 μg/m3 (0) 3.0 μg/m3 (12) 25.0
 
March 30, 2020, 4 a.m. 3.5 ppb (3) -0.1 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 28.0
 
March 30, 2020, 3 a.m. 9.5 ppb (9) 0.0 ppb (0) 9.3 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (24) 0.16 ppb (2) 3.0 μg/m3 (3) N/A 24.0
 
March 30, 2020, 2 a.m. 4.8 ppb (4) 0.0 ppb (0) 4.7 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) 4.0 μg/m3 (4) N/A 28.0
 
March 30, 2020, 1 a.m. 2.3 ppb (2) 0.0 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 32.0
 
March 30, 2020, midnight 2.0 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 33.0
 
March 29, 2020, 11 p.m. 2.4 ppb (2) 0.1 ppb (0) 2.9 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 33.0
 
March 29, 2020, 10 p.m. 2.0 ppb (2) 0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 33.0
 
March 29, 2020, 9 p.m. 1.5 ppb (1) 0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 2.0 μg/m3 (2) -3.0 μg/m3 (0) 32.0
 
March 29, 2020, 8 p.m. 1.1 ppb (1) 0.0 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 31.0
 
March 29, 2020, 7 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) -2.0 μg/m3 (0) 6.0 μg/m3 (25) 31.0
 
March 29, 2020, 6 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 30.0
 
March 29, 2020, 5 p.m. 0.7 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 30.0
 
March 29, 2020, 4 p.m. 1.2 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 18.0 μg/m3 (16) 3.0 μg/m3 (12) 28.0
 
March 29, 2020, 3 p.m. 1.5 ppb (1) 0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 27.0
 
March 29, 2020, 2 p.m. 2.7 ppb (3) 0.2 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 25.0
 
March 29, 2020, 1 p.m. 1.7 ppb (2) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.12 ppb (1) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 25.0
 
March 29, 2020, noon 1.2 ppb (1) 0.0 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.12 ppb (1) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 26.0
 
March 29, 2020, 11 a.m. 1.5 ppb (1) -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 25.0
 
March 29, 2020, 10 a.m. 1.6 ppb (1) -0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 25.0
 
March 29, 2020, 9 a.m. 1.8 ppb (2) 0.0 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 24.0
 
March 29, 2020, 8 a.m. 1.9 ppb (2) -0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.13 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 24.0
 
March 29, 2020, 7 a.m. 2.8 ppb (3) -0.1 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 22.0
 
March 29, 2020, 6 a.m. 2.9 ppb (3) -0.1 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 22.0
 
March 29, 2020, 5 a.m. 1.8 ppb (2) -0.1 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) -4.0 μg/m3 (0) 4.0 μg/m3 (17) 22.0
 
March 29, 2020, 4 a.m. 1.5 ppb (1) 0.0 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) -4.0 μg/m3 (0) 2.0 μg/m3 (8) 24.0
 
March 29, 2020, 3 a.m. 1.3 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) -3.0 μg/m3 (0) 3.0 μg/m3 (12) 26.0
 
March 29, 2020, 2 a.m. 1.0 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) 0.0 μg/m3 (0) -2.0 μg/m3 (0) 28.0
 
March 29, 2020, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 4.0 μg/m3 (4) -2.0 μg/m3 (0) 28.0
 
March 29, 2020, midnight 1.1 ppb (1) 0.0 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 31.0
 
March 28, 2020, 11 p.m. 1.1 ppb (1) 0.0 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 32.0
 
March 28, 2020, 10 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 32.0
 
March 28, 2020, 9 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 32.0
 
March 28, 2020, 8 p.m. 1.1 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 3.0 μg/m3 (3) -3.0 μg/m3 (0) 31.0
 
March 28, 2020, 7 p.m. 1.1 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 30.0
 
March 28, 2020, 6 p.m. 1.6 ppb (1) 0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) 4.0 μg/m3 (4) 10.0 μg/m3 (42) 42.0
 
March 28, 2020, 5 p.m. 1.8 ppb (2) 0.2 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.13 ppb (1) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 29.0
 
March 28, 2020, 4 p.m. 1.6 ppb (1) 0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 28.0
 
March 28, 2020, 3 p.m. 1.3 ppb (1) 0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 28.0
 
March 28, 2020, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 28.0
 
March 28, 2020, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) 3.0 μg/m3 (3) -4.0 μg/m3 (0) 28.0
 
March 28, 2020, noon 0.9 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.12 ppb (1) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 30.0
 
March 28, 2020, 11 a.m. 1.1 ppb (1) -0.1 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.12 ppb (1) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 30.0
 
March 28, 2020, 10 a.m. 1.2 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 30.0
 
March 28, 2020, 9 a.m. 1.0 ppb (1) -0.1 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 2.0 μg/m3 (2) 3.0 μg/m3 (12) 27.0
 
March 28, 2020, 8 a.m. 0.9 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) 1.0 μg/m3 (1) 0.0 μg/m3 (0) 25.0
 
March 28, 2020, 7 a.m. 1.0 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) 1.0 μg/m3 (1) 4.0 μg/m3 (17) 25.0
 
March 28, 2020, 6 a.m. 1.1 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 0.0 μg/m3 (0) 5.0 μg/m3 (21) 25.0
 
March 28, 2020, 5 a.m. 1.0 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) 1.0 μg/m3 (1) -2.0 μg/m3 (0) 28.0
 
March 28, 2020, 4 a.m. 1.2 ppb (1) -0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) 3.0 μg/m3 (3) -3.0 μg/m3 (0) 26.0
 
March 28, 2020, 3 a.m. 1.6 ppb (1) -0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 27.0
 
March 28, 2020, 2 a.m. 1.5 ppb (1) -0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) 3.0 μg/m3 (3) -2.0 μg/m3 (0) 30.0
 
March 28, 2020, 1 a.m. 1.3 ppb (1) 0.0 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) 3.0 μg/m3 (3) -3.0 μg/m3 (0) 30.0
 
March 28, 2020, midnight 1.1 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) -2.0 μg/m3 (0) -1.0 μg/m3 (0) 28.0
 
March 27, 2020, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) -2.0 μg/m3 (0) -2.0 μg/m3 (0) 27.0
 
March 27, 2020, 10 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) 3.0 μg/m3 (3) -4.0 μg/m3 (0) 28.0
 
March 27, 2020, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 27.0
 
March 27, 2020, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 27.0
 
March 27, 2020, 7 p.m. 1.0 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 28.0
 
March 27, 2020, 6 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 28.0
 
March 27, 2020, 5 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 29.0
 
March 27, 2020, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 28.0
 
March 27, 2020, 3 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) 5.0 μg/m3 (5) -3.0 μg/m3 (0) 28.0
 
March 27, 2020, 2 p.m. 0.9 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) 0.11 ppb (1) 3.0 μg/m3 (3) -4.0 μg/m3 (0) 28.0
 
March 27, 2020, 1 p.m. 0.9 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.11 ppb (1) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 28.0
 
March 27, 2020, noon 0.8 ppb (1) -0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) -1.0 μg/m3 (0) 3.0 μg/m3 (12) 29.0
 
March 27, 2020, 11 a.m. 0.9 ppb (1) -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 30.0
 
March 27, 2020, 10 a.m. 0.8 ppb (1) -0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 30.0
 
March 27, 2020, 9 a.m. N/A -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 12.0
 
March 27, 2020, 8 a.m. 0.5 ppb (0) -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 29.0
 
March 27, 2020, 7 a.m. 0.8 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) 7.0 μg/m3 (6) -1.0 μg/m3 (0) 28.0
 
March 27, 2020, 6 a.m. 0.8 ppb (1) -0.1 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 27.0
 
March 27, 2020, 5 a.m. 0.9 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 28.0
 
March 27, 2020, 4 a.m. 0.9 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) 0.14 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 27.0
 
March 27, 2020, 3 a.m. 2.0 ppb (2) -0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 24.0
 
March 27, 2020, 2 a.m. 2.2 ppb (2) -0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) 12.0 μg/m3 (11) 3.0 μg/m3 (12) 25.0
 
March 27, 2020, 1 a.m. 1.3 ppb (1) -0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 29.0
 
March 27, 2020, midnight 1.1 ppb (1) 0.0 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 29.0
 
March 26, 2020, 11 p.m. 1.3 ppb (1) 0.0 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) 11.0 μg/m3 (10) 0.0 μg/m3 (0) 28.0
 
March 26, 2020, 10 p.m. 1.6 ppb (1) 0.0 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 9.0 μg/m3 (8) 1.0 μg/m3 (4) 31.0
 
March 26, 2020, 9 p.m. 1.2 ppb (1) 0.0 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 31.0
 
March 26, 2020, 8 p.m. 1.2 ppb (1) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) 7.0 μg/m3 (6) 1.0 μg/m3 (4) 29.0
 
March 26, 2020, 7 p.m. 1.6 ppb (1) 0.1 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 28.0
 
March 26, 2020, 6 p.m. 2.0 ppb (2) 0.2 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 25.0
 
March 26, 2020, 5 p.m. 3.2 ppb (3) 0.5 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 21.0
 
March 26, 2020, 4 p.m. 3.0 ppb (3) 0.3 ppb (0) 3.9 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.15 ppb (2) 23.0 μg/m3 (21) 7.0 μg/m3 (29) 29.0
 
March 26, 2020, 3 p.m. 3.8 ppb (4) 0.2 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 21.0 ppb (16) 0.14 ppb (2) 36.0 μg/m3 (33) 9.0 μg/m3 (38) 38.0
 
March 26, 2020, 2 p.m. 6.2 ppb (6) 0.1 ppb (0) 6.4 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) 0.15 ppb (2) 14.0 μg/m3 (13) 7.0 μg/m3 (29) 29.0
 
March 26, 2020, 1 p.m. 9.1 ppb (8) 0.0 ppb (0) 8.3 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.16 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
March 26, 2020, noon 8.2 ppb (8) 0.0 ppb (0) 9.0 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 16.0 ppb (12) 0.14 ppb (2) 11.0 μg/m3 (10) -1.0 μg/m3 (0) 12.0
 
March 26, 2020, 11 a.m. 7.8 ppb (7) 0.0 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (15) 0.14 ppb (2) 3.0 μg/m3 (3) -2.0 μg/m3 (0) 15.0
 
March 26, 2020, 10 a.m. 7.2 ppb (7) 0.0 ppb (0) 6.3 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.15 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 15.0
 
March 26, 2020, 9 a.m. 6.4 ppb (6) -0.1 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.15 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 17.0
 
March 26, 2020, 8 a.m. 5.0 ppb (5) -0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (16) 0.13 ppb (1) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 16.0
 
March 26, 2020, 7 a.m. 3.3 ppb (3) -0.1 ppb (0) 2.4 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 19.0
 
March 26, 2020, 6 a.m. 2.9 ppb (3) -0.1 ppb (0) 2.4 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 21.0
 
March 26, 2020, 5 a.m. 2.7 ppb (3) -0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 19.0
 
March 26, 2020, 4 a.m. 1.8 ppb (2) -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 21.0
 
March 26, 2020, 3 a.m. 1.6 ppb (1) -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) -1.0 μg/m3 (0) -3.0 μg/m3 (0) 24.0
 
March 26, 2020, 2 a.m. 1.5 ppb (1) -0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) -2.0 μg/m3 (0) -2.0 μg/m3 (0) 26.0
 
March 26, 2020, 1 a.m. 1.1 ppb (1) 0.0 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 28.0
 
March 26, 2020, midnight 1.0 ppb (1) 0.0 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 32.0
 
March 25, 2020, 11 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 32.0
 
March 25, 2020, 10 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 32.0
 
March 25, 2020, 9 p.m. 0.7 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 32.0
 
March 25, 2020, 8 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 32.0
 
March 25, 2020, 7 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 30.0
 
March 25, 2020, 6 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 28.0
 
March 25, 2020, 5 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 28.0
 
March 25, 2020, 4 p.m. 1.4 ppb (1) 0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) N/A N/A 26.0
 
March 25, 2020, 3 p.m. 3.5 ppb (3) 0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 26.0
 
March 25, 2020, 2 p.m. 3.7 ppb (3) 0.1 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 26.0
 
March 25, 2020, 1 p.m. 2.3 ppb (2) -0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 28.0
 
March 25, 2020, noon 2.2 ppb (2) -0.1 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.17 ppb (2) -1.0 μg/m3 (0) -1.0 μg/m3 (0) 26.0
 
March 25, 2020, 11 a.m. 3.5 ppb (3) -0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.16 ppb (2) -3.0 μg/m3 (0) -2.0 μg/m3 (0) 27.0
 
March 25, 2020, 10 a.m. 7.2 ppb (7) -0.1 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 24.0
 
March 25, 2020, 9 a.m. 15.0 ppb (14) 0.0 ppb (0) 13.9 ppb (13) 14.0 ppb (13) N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 21.0
 
March 25, 2020, 8 a.m. 19.3 ppb (18) 0.0 ppb (0) 19.3 ppb (18) 19.0 ppb (18) N/A 0.0 ppb (0) 19.0 ppb (15) 0.17 ppb (2) 18.0 μg/m3 (16) 0.0 μg/m3 (0) 18.0
 
March 25, 2020, 7 a.m. 6.0 ppb (6) 0.0 ppb (0) 6.5 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 19.0
 
March 25, 2020, 6 a.m. 4.8 ppb (4) -0.1 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.14 ppb (2) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 22.0
 
March 25, 2020, 5 a.m. 3.5 ppb (3) -0.1 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) 3.0 μg/m3 (3) -2.0 μg/m3 (0) 25.0
 
March 25, 2020, 4 a.m. 3.9 ppb (4) -0.1 ppb (0) 3.4 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 25.0
 
March 25, 2020, 3 a.m. 6.7 ppb (6) 0.0 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) -1.0 μg/m3 (0) 0.0 μg/m3 (0) 26.0
 
March 25, 2020, 2 a.m. 2.4 ppb (2) -0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) -2.0 μg/m3 (0) -1.0 μg/m3 (0) 29.0
 
March 25, 2020, 1 a.m. 0.9 ppb (1) -0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) -1.0 μg/m3 (0) -1.0 μg/m3 (0) 31.0
 
March 25, 2020, midnight 0.6 ppb (1) 0.0 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 0.0 μg/m3 (0) -1.0 μg/m3 (0) 31.0
 
March 24, 2020, 11 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) -3.0 μg/m3 (0) -3.0 μg/m3 (0) 32.0
 
March 24, 2020, 10 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) -1.0 μg/m3 (0) -4.0 μg/m3 (0) 32.0
 
March 24, 2020, 9 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 32.0
 
March 24, 2020, 8 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 1.0 μg/m3 (1) -2.0 μg/m3 (0) 31.0
 
March 24, 2020, 7 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 3.0 μg/m3 (3) -4.0 μg/m3 (0) 32.0
 
March 24, 2020, 6 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 31.0
 
March 24, 2020, 5 p.m. 0.8 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 31.0
 
March 24, 2020, 4 p.m. 1.0 ppb (1) 0.1 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 30.0
 
March 24, 2020, 3 p.m. 1.7 ppb (2) 0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) 4.0 μg/m3 (4) 7.0 μg/m3 (29) 29.0
 
March 24, 2020, 2 p.m. 1.9 ppb (2) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 0.0 μg/m3 (0) -3.0 μg/m3 (0) 27.0
 
March 24, 2020, 1 p.m. 1.6 ppb (1) -0.1 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) -1.0 μg/m3 (0) -4.0 μg/m3 (0) 26.0
 
March 24, 2020, noon 1.2 ppb (1) -0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) 1.0 μg/m3 (1) -2.0 μg/m3 (0) 28.0
 
March 24, 2020, 11 a.m. 1.1 ppb (1) -0.1 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) -1.0 μg/m3 (0) -1.0 μg/m3 (0) 27.0
 
March 24, 2020, 10 a.m. 1.3 ppb (1) -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (26) 0.12 ppb (1) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 26.0
 
March 24, 2020, 9 a.m. N/A -0.1 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A N/A N/A N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 2.0
 
March 24, 2020, 8 a.m. 3.7 ppb (3) -0.1 ppb (0) 2.9 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.14 ppb (2) 1.0 μg/m3 (1) N/A 23.0
 
March 24, 2020, 7 a.m. 2.5 ppb (2) -0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) 1.0 μg/m3 (1) N/A 25.0
 
March 24, 2020, 6 a.m. N/A 0.0 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A N/A N/A N/A 0.0 μg/m3 (0) N/A 2.0
 
March 24, 2020, 5 a.m. N/A -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A N/A N/A N/A -2.0 μg/m3 (0) N/A 1.0
 
March 24, 2020, 4 a.m. 1.6 ppb (1) -0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.11 ppb (1) -1.0 μg/m3 (0) -2.0 μg/m3 (0) 25.0
 
March 24, 2020, 3 a.m. N/A -0.1 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A N/A N/A N/A 1.0 μg/m3 (1) 2.0 μg/m3 (8) 8.0
 
March 24, 2020, 2 a.m. N/A -0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A N/A N/A N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 4.0
 
March 24, 2020, 1 a.m. 5.1 ppb (5) 0.0 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 29.0
 
March 24, 2020, midnight 2.2 ppb (2) 0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 32.0
 
March 23, 2020, 11 p.m. 1.3 ppb (1) 0.1 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 33.0
 
March 23, 2020, 10 p.m. 2.0 ppb (2) 0.2 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 7.0 μg/m3 (6) 1.0 μg/m3 (4) 34.0
 
March 23, 2020, 9 p.m. 1.8 ppb (2) 0.2 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 6.0 μg/m3 (5) -2.0 μg/m3 (0) 35.0
 
March 23, 2020, 8 p.m. 1.6 ppb (1) 0.1 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 35.0
 
March 23, 2020, 7 p.m. 1.4 ppb (1) 0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 0.0 μg/m3 (0) -1.0 μg/m3 (0) 34.0
 
March 23, 2020, 6 p.m. 1.9 ppb (2) 0.2 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 33.0
 
March 23, 2020, 5 p.m. 2.9 ppb (3) 0.5 ppb (0) 2.6 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 32.0
 
March 23, 2020, 4 p.m. 9.4 ppb (9) 2.7 ppb (3) 8.7 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.17 ppb (2) 10.0 μg/m3 (9) 18.0 μg/m3 (63) 63.0
 
March 23, 2020, 3 p.m. 8.2 ppb (8) 1.9 ppb (2) 7.4 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.17 ppb (2) 17.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
March 23, 2020, 2 p.m. 6.7 ppb (6) 0.4 ppb (0) 5.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 22.0
 
March 23, 2020, 1 p.m. 4.0 ppb (4) 0.0 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) -1.0 μg/m3 (0) 1.0 μg/m3 (4) 21.0
 
March 23, 2020, noon 4.9 ppb (5) 0.0 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) -1.0 μg/m3 (0) 1.0 μg/m3 (4) 19.0
 
March 23, 2020, 11 a.m. 3.9 ppb (4) 0.0 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.14 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 20.0
 
March 23, 2020, 10 a.m. 3.0 ppb (3) -0.1 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 23.0
 
March 23, 2020, 9 a.m. 2.5 ppb (2) -0.1 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 23.0
 
March 23, 2020, 8 a.m. 2.2 ppb (2) -0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 25.0