ID: 2019

AQSQID: 560210100

Site Name: Cheyenne Ncore

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

Updated: April 10, 2021, 10:43 a.m.

Location: Cheyenne (Chief Washwick Ave), WY

Reporting: True, Located: True

Current AQI: 30.0

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
April 10, 2021, 8 a.m. 7.9 ppb (8) -0.1 ppb (0) 8.6 ppb (9) 8.0 ppb (8) 8.5 ppb (9) 0.0 ppb (0) 32.0 ppb (30) 0.09 ppb (2) 9.0 μg/m3 (9) 0.0 μg/m3 (0) 30.0
 
April 10, 2021, 7 a.m. 10.0 ppb (10) 0.0 ppb (0) 10.6 ppb (10) 10.0 ppb (10) 10.5 ppb (10) 0.0 ppb (0) 29.0 ppb (27) 0.08 ppb (2) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 27.0
 
April 10, 2021, 6 a.m. 11.7 ppb (12) 0.0 ppb (0) 12.6 ppb (12) 12.0 ppb (12) 12.5 ppb (12) 0.0 ppb (0) 27.0 ppb (25) 0.09 ppb (2) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 25.0
 
April 10, 2021, 5 a.m. 13.3 ppb (13) 0.0 ppb (0) 14.9 ppb (15) 13.0 ppb (13) 14.8 ppb (14) 0.0 ppb (0) 25.0 ppb (24) 0.1 ppb (2) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 24.0
 
April 10, 2021, 4 a.m. 7.5 ppb (8) 0.1 ppb (1) 7.1 ppb (7) 7.0 ppb (7) 7.0 ppb (7) 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 31.0
 
April 10, 2021, 3 a.m. 2.4 ppb (3) -0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 37.0 ppb (35) 0.06 ppb (2) 2.0 μg/m3 (2) -2.0 μg/m3 (0) 35.0
 
April 10, 2021, 2 a.m. 1.7 ppb (2) -0.2 ppb (0) 1.8 ppb (2) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.06 ppb (2) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 36.0
 
April 10, 2021, 1 a.m. 0.9 ppb (1) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.05 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 41.0
 
April 10, 2021, midnight 0.5 ppb (1) -0.2 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.05 ppb (2) 6.0 μg/m3 (6) -2.0 μg/m3 (0) 48.0
 
April 9, 2021, 11 p.m. 0.5 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.05 ppb (2) 4.0 μg/m3 (4) -2.0 μg/m3 (0) 48.0
 
April 9, 2021, 10 p.m. 0.5 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.05 ppb (2) 6.0 μg/m3 (6) 0.0 μg/m3 (0) 43.0
 
April 9, 2021, 9 p.m. 0.4 ppb (1) -0.1 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.06 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (5) 41.0
 
April 9, 2021, 8 p.m. 0.4 ppb (1) -0.1 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.06 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (9) 42.0
 
April 9, 2021, 7 p.m. 0.4 ppb (1) -0.1 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.06 ppb (2) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 40.0
 
April 9, 2021, 6 p.m. 0.3 ppb (1) -0.2 ppb (0) 0.5 ppb (1) 0.0 ppb (0) 0.4 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.06 ppb (2) 5.0 μg/m3 (5) -4.0 μg/m3 (0) 40.0
 
April 9, 2021, 5 p.m. 0.5 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.07 ppb (2) 5.0 μg/m3 (5) -2.0 μg/m3 (0) 39.0
 
April 9, 2021, 4 p.m. 0.5 ppb (1) -0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 39.0
 
April 9, 2021, 3 p.m. N/A N/A 0.6 ppb (1) N/A 0.5 ppb (1) N/A N/A N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 13.0
 
April 9, 2021, 2 p.m. 0.9 ppb (1) 0.0 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.05 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 37.0
 
April 9, 2021, 1 p.m. 0.7 ppb (1) -0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.05 ppb (2) -1.0 μg/m3 (0) -1.0 μg/m3 (0) 38.0
 
April 9, 2021, noon 0.5 ppb (1) -0.2 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.05 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 38.0
 
April 9, 2021, 11 a.m. 0.4 ppb (1) -0.2 ppb (0) 0.4 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.05 ppb (2) 4.0 μg/m3 (4) -2.0 μg/m3 (0) 38.0
 
April 9, 2021, 10 a.m. 0.4 ppb (1) -0.2 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.04 ppb (0) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 37.0
 
April 9, 2021, 9 a.m. 0.4 ppb (1) -0.2 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.04 ppb (0) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 37.0
 
April 9, 2021, 8 a.m. 0.4 ppb (1) -0.2 ppb (0) 0.4 ppb (1) 1.0 ppb (1) 0.4 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.04 ppb (0) 4.0 μg/m3 (4) -2.0 μg/m3 (0) 38.0
 
April 9, 2021, 7 a.m. 0.4 ppb (1) -0.2 ppb (0) 0.5 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.04 ppb (0) 3.0 μg/m3 (3) 1.0 μg/m3 (5) 38.0
 
April 9, 2021, 6 a.m. 0.6 ppb (1) -0.2 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.04 ppb (0) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 36.0
 
April 9, 2021, 5 a.m. 0.5 ppb (1) -0.2 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.05 ppb (2) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 40.0
 
April 9, 2021, 4 a.m. 0.7 ppb (1) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.05 ppb (2) 17.0 μg/m3 (16) 3.0 μg/m3 (13) 41.0
 
April 9, 2021, 3 a.m. 1.2 ppb (2) -0.2 ppb (0) 1.5 ppb (2) 1.0 ppb (1) 1.5 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.06 ppb (2) 15.0 μg/m3 (14) 1.0 μg/m3 (5) 43.0
 
April 9, 2021, 2 a.m. 1.1 ppb (2) -0.2 ppb (0) 1.4 ppb (2) 1.0 ppb (1) 1.4 ppb (2) 0.0 ppb (0) 48.0 ppb (45) 0.06 ppb (2) 24.0 μg/m3 (23) 2.0 μg/m3 (9) 45.0
 
April 9, 2021, 1 a.m. 1.0 ppb (1) -0.2 ppb (0) 1.4 ppb (2) 1.0 ppb (1) 1.4 ppb (2) 0.0 ppb (0) 51.0 ppb (48) 0.06 ppb (2) 15.0 μg/m3 (14) 1.0 μg/m3 (5) 48.0
 
April 9, 2021, midnight 0.7 ppb (1) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 53.0 ppb (50) 0.05 ppb (2) 14.0 μg/m3 (13) 0.0 μg/m3 (0) 50.0
 
April 8, 2021, 11 p.m. 0.7 ppb (1) -0.1 ppb (0) 1.1 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 53.0 ppb (50) 0.04 ppb (0) 12.0 μg/m3 (12) 3.0 μg/m3 (13) 50.0
 
April 8, 2021, 10 p.m. 0.6 ppb (1) -0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 55.0 ppb (51) 0.04 ppb (0) 16.0 μg/m3 (15) -1.0 μg/m3 (0) 51.0
 
April 8, 2021, 9 p.m. 0.5 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 54.0 ppb (50) 0.05 ppb (2) 11.0 μg/m3 (11) 0.0 μg/m3 (0) 50.0
 
April 8, 2021, 8 p.m. 0.4 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 55.0 ppb (51) 0.04 ppb (0) 11.0 μg/m3 (11) 4.0 μg/m3 (17) 51.0
 
April 8, 2021, 7 p.m. 0.4 ppb (1) -0.2 ppb (0) 0.7 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 54.0 ppb (50) 0.04 ppb (0) 9.0 μg/m3 (9) 5.0 μg/m3 (21) 50.0
 
April 8, 2021, 6 p.m. 0.5 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 52.0 ppb (49) 0.04 ppb (0) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 49.0
 
April 8, 2021, 5 p.m. 0.4 ppb (1) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.05 ppb (2) 11.0 μg/m3 (11) 2.0 μg/m3 (9) 48.0
 
April 8, 2021, 4 p.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) 0.06 ppb (2) 4.0 μg/m3 (4) 18.0 μg/m3 (64) 64.0
 
April 8, 2021, 3 p.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) 0.06 ppb (2) N/A N/A 48.0
 
April 8, 2021, 2 p.m. 1.8 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) 0.07 ppb (2) N/A N/A 45.0
 
April 8, 2021, 1 p.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) 0.07 ppb (2) 16.0 μg/m3 (15) 1.0 μg/m3 (5) 41.0
 
April 8, 2021, noon 1.8 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.07 ppb (2) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 41.0
 
April 8, 2021, 11 a.m. 1.4 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.07 ppb (2) 8.0 μg/m3 (8) 1.0 μg/m3 (5) 41.0
 
April 8, 2021, 10 a.m. 1.3 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) 0.08 ppb (2) 8.0 μg/m3 (8) 0.0 μg/m3 (0) 39.0
 
April 8, 2021, 9 a.m. 1.3 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) 0.08 ppb (2) 11.0 μg/m3 (11) 1.0 μg/m3 (5) 38.0
 
April 8, 2021, 8 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) 0.06 ppb (2) 12.0 μg/m3 (12) 1.0 μg/m3 (5) 38.0
 
April 8, 2021, 7 a.m. 1.9 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.07 ppb (2) 9.0 μg/m3 (9) -1.0 μg/m3 (0) 37.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 0.0 μg/m3 (0) 7.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 9.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -1.0 μg/m3 (0) 4.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) -1.0 μg/m3 (0) 6.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 13.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 13.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 17.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 6.0 μg/m3 (25) 25.0
 
April 7, 2021, 10 p.m. 2.8 ppb (3) 0.8 ppb (1) -0.4 ppb (0) 2.0 ppb (2) -0.5 ppb (0) -1.0 ppb (0) 30.0 ppb (28) 0.01 ppb (0) -1.0 μg/m3 (0) 3.0 μg/m3 (13) 28.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 1.0 μg/m3 (5) 5.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 6.0 μg/m3 (25) 25.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 8.0 μg/m3 (34) 34.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 0.0 μg/m3 (0) 6.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 2.0
 
April 7, 2021, 2 p.m. 1.4 ppb (2) 0.0 ppb (0) 0.2 ppb (1) 1.0 ppb (1) 0.0 ppb (0) -1.0 ppb (0) 31.0 ppb (29) 0.02 ppb (0) 3.0 μg/m3 (3) 3.0 μg/m3 (13) 29.0
 
April 7, 2021, 1 p.m. 1.4 ppb (2) -0.1 ppb (0) 0.3 ppb (1) 1.0 ppb (1) 0.2 ppb (1) -1.0 ppb (0) 30.0 ppb (28) 0.04 ppb (0) 4.0 μg/m3 (4) 2.0 μg/m3 (9) 28.0
 
April 7, 2021, noon 1.7 ppb (2) 0.0 ppb (0) 0.3 ppb (1) 2.0 ppb (2) 0.2 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.1 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (13) 27.0
 
April 7, 2021, 11 a.m. 1.1 ppb (2) -0.2 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.2 ppb (0) -1.0 ppb (0) 28.0 ppb (26) 0.01 ppb (0) 2.0 μg/m3 (2) 2.0 μg/m3 (9) 26.0
 
April 7, 2021, 10 a.m. 1.0 ppb (1) -0.2 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.2 ppb (0) -1.0 ppb (0) 27.0 ppb (25) 0.03 ppb (0) 4.0 μg/m3 (4) 1.0 μg/m3 (5) 25.0
 
April 7, 2021, 9 a.m. 1.2 ppb (2) -0.1 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.0 ppb (0) -1.0 ppb (0) 29.0 ppb (27) 0.03 ppb (0) 5.0 μg/m3 (5) 2.0 μg/m3 (9) 27.0
 
April 7, 2021, 8 a.m. 1.3 ppb (2) -0.1 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.1 ppb (1) -1.0 ppb (0) 31.0 ppb (29) 0.07 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (9) 29.0
 
April 7, 2021, 7 a.m. 1.3 ppb (2) -0.2 ppb (0) 0.2 ppb (1) 1.0 ppb (1) 0.2 ppb (1) -1.0 ppb (0) 33.0 ppb (31) 0.02 ppb (0) 4.0 μg/m3 (4) 2.0 μg/m3 (9) 31.0
 
April 7, 2021, 6 a.m. 1.4 ppb (2) -0.2 ppb (0) 0.4 ppb (1) 2.0 ppb (2) 0.4 ppb (1) -1.0 ppb (0) 33.0 ppb (31) 0.02 ppb (0) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 31.0
 
April 7, 2021, 5 a.m. 1.5 ppb (2) -0.2 ppb (0) 0.4 ppb (1) 2.0 ppb (2) 0.4 ppb (1) -1.0 ppb (0) 33.0 ppb (31) 0.03 ppb (0) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 31.0
 
April 7, 2021, 4 a.m. 1.5 ppb (2) -0.2 ppb (0) 0.4 ppb (1) 2.0 ppb (2) 0.4 ppb (1) -1.0 ppb (0) 30.0 ppb (28) 0.05 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 28.0
 
April 7, 2021, 3 a.m. N/A N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 13.0
 
April 7, 2021, 2 a.m. 2.1 ppb (2) -0.2 ppb (0) 1.1 ppb (2) 2.0 ppb (2) 1.1 ppb (2) -1.0 ppb (0) 33.0 ppb (31) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 31.0
 
April 7, 2021, 1 a.m. 1.4 ppb (2) -0.2 ppb (0) 0.3 ppb (1) 2.0 ppb (2) 0.3 ppb (1) -1.0 ppb (0) 37.0 ppb (35) N/A 7.0 μg/m3 (7) 3.0 μg/m3 (13) 35.0
 
April 7, 2021, midnight 1.0 ppb (1) -0.1 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.3 ppb (0) -1.0 ppb (0) 41.0 ppb (38) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 38.0
 
April 6, 2021, 11 p.m. 1.0 ppb (1) -0.1 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.2 ppb (0) -1.0 ppb (0) 43.0 ppb (40) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 40.0
 
April 6, 2021, 10 p.m. 1.1 ppb (2) -0.1 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 43.0 ppb (40) N/A 18.0 μg/m3 (17) 7.0 μg/m3 (30) 40.0
 
April 6, 2021, 9 p.m. 1.2 ppb (2) -0.1 ppb (0) 0.3 ppb (1) 1.0 ppb (1) 0.2 ppb (1) -1.0 ppb (0) 42.0 ppb (39) N/A 25.0 μg/m3 (24) 6.0 μg/m3 (25) 39.0
 
April 6, 2021, 8 p.m. 1.2 ppb (2) 0.0 ppb (0) 0.4 ppb (1) 1.0 ppb (1) 0.2 ppb (1) -1.0 ppb (0) 40.0 ppb (38) N/A 31.0 μg/m3 (29) 11.0 μg/m3 (46) 46.0
 
April 6, 2021, 7 p.m. 1.5 ppb (2) 0.1 ppb (1) 0.7 ppb (1) 1.0 ppb (1) 0.4 ppb (1) 0.0 ppb (0) 40.0 ppb (38) N/A 38.0 μg/m3 (36) 7.0 μg/m3 (30) 38.0
 
April 6, 2021, 6 p.m. 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 39.0 ppb (37) N/A 30.0 μg/m3 (28) 2.0 μg/m3 (9) 37.0
 
April 6, 2021, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 38.0 ppb (36) N/A 24.0 μg/m3 (23) 2.0 μg/m3 (9) 36.0
 
April 6, 2021, 4 p.m. 1.2 ppb (2) 0.0 ppb (0) 0.2 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 36.0 ppb (34) N/A 21.0 μg/m3 (20) 2.0 μg/m3 (9) 34.0
 
April 6, 2021, 3 p.m. 1.4 ppb (2) 0.1 ppb (1) 0.5 ppb (1) 1.0 ppb (1) 0.2 ppb (1) 0.0 ppb (0) 36.0 ppb (34) N/A 28.0 μg/m3 (26) 6.0 μg/m3 (25) 34.0
 
April 6, 2021, 2 p.m. 1.2 ppb (2) 0.0 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 36.0 ppb (34) N/A 20.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 1 p.m. 1.1 ppb (2) -0.1 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 32.0 ppb (30) N/A 22.0 μg/m3 (21) 2.0 μg/m3 (9) 30.0
 
April 6, 2021, noon 0.9 ppb (1) -0.2 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.2 ppb (0) 0.0 ppb (0) 31.0 ppb (29) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (13) 29.0
 
April 6, 2021, 11 a.m. 0.9 ppb (1) -0.2 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.2 ppb (0) 0.0 ppb (0) 32.0 ppb (30) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 30.0
 
April 6, 2021, 10 a.m. 0.9 ppb (1) -0.2 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.2 ppb (0) 0.0 ppb (0) 34.0 ppb (32) N/A 16.0 μg/m3 (15) 1.0 μg/m3 (5) 32.0
 
April 6, 2021, 9 a.m. 0.9 ppb (1) -0.2 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 37.0 ppb (35) N/A 44.0 μg/m3 (41) 2.0 μg/m3 (9) 41.0
 
April 6, 2021, 8 a.m. 1.0 ppb (1) -0.2 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 39.0 ppb (37) N/A 50.0 μg/m3 (47) 2.0 μg/m3 (9) 47.0
 
April 6, 2021, 7 a.m. 1.0 ppb (1) -0.2 ppb (0) 0.0 ppb (0) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 39.0 ppb (37) N/A 42.0 μg/m3 (39) 4.0 μg/m3 (17) 39.0
 
April 6, 2021, 6 a.m. 1.0 ppb (1) -0.2 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 40.0 ppb (38) N/A 32.0 μg/m3 (30) 5.0 μg/m3 (21) 38.0
 
April 6, 2021, 5 a.m. 1.1 ppb (2) -0.2 ppb (0) 0.0 ppb (0) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 41.0 ppb (38) N/A 31.0 μg/m3 (29) 5.0 μg/m3 (21) 38.0
 
April 6, 2021, 4 a.m. 1.0 ppb (1) -0.2 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 40.0 ppb (38) N/A 23.0 μg/m3 (22) 3.0 μg/m3 (13) 38.0
 
April 6, 2021, 3 a.m. 1.2 ppb (2) -0.2 ppb (0) 0.0 ppb (0) 1.0 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 39.0 ppb (37) N/A 37.0 μg/m3 (35) 4.0 μg/m3 (17) 37.0
 
April 6, 2021, 2 a.m. 1.2 ppb (2) -0.2 ppb (0) 0.2 ppb (1) 1.0 ppb (1) 0.2 ppb (1) 0.0 ppb (0) 44.0 ppb (41) N/A 38.0 μg/m3 (36) 4.0 μg/m3 (17) 41.0
 
April 6, 2021, 1 a.m. 2.8 ppb (3) -0.2 ppb (0) 1.6 ppb (2) 3.0 ppb (3) 1.6 ppb (2) 0.0 ppb (0) 49.0 ppb (46) N/A 27.0 μg/m3 (25) 3.0 μg/m3 (13) 46.0
 
April 6, 2021, midnight 2.3 ppb (3) -0.1 ppb (0) 1.5 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 51.0 ppb (48) N/A 11.0 μg/m3 (11) -1.0 μg/m3 (0) 48.0
 
April 5, 2021, 11 p.m. 0.9 ppb (1) -0.1 ppb (0) 0.1 ppb (1) 1.0 ppb (1) 0.0 ppb (0) -1.0 ppb (0) 54.0 ppb (50) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 50.0
 
April 5, 2021, 10 p.m. 0.3 ppb (1) -0.2 ppb (0) -0.5 ppb (0) 0.0 ppb (0) -0.6 ppb (0) -1.0 ppb (0) 55.0 ppb (51) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (5) 51.0
 
April 5, 2021, 9 p.m. 0.6 ppb (1) -0.1 ppb (0) -0.3 ppb (0) 1.0 ppb (1) -0.3 ppb (0) -1.0 ppb (0) 54.0 ppb (50) N/A 5.0 μg/m3 (5) -2.0 μg/m3 (0) 50.0
 
April 5, 2021, 8 p.m. 0.7 ppb (1) -0.1 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.2 ppb (0) -1.0 ppb (0) 53.0 ppb (50) N/A 7.0 μg/m3 (7) -2.0 μg/m3 (0) 50.0
 
April 5, 2021, 7 p.m. 0.7 ppb (1) -0.1 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.3 ppb (0) -1.0 ppb (0) 52.0 ppb (49) N/A 9.0 μg/m3 (9) -1.0 μg/m3 (0) 49.0
 
April 5, 2021, 6 p.m. 0.5 ppb (1) -0.1 ppb (0) -0.3 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 51.0 ppb (48) N/A 8.0 μg/m3 (8) 1.0 μg/m3 (5) 48.0
 
April 5, 2021, 5 p.m. 2.3 ppb (3) 0.4 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.2 ppb (2) -1.0 ppb (0) 49.0 ppb (46) N/A 8.0 μg/m3 (8) 2.0 μg/m3 (9) 46.0
 
April 5, 2021, 4 p.m. 1.9 ppb (2) 0.2 ppb (1) 1.1 ppb (2) 2.0 ppb (2) 0.7 ppb (1) -1.0 ppb (0) 48.0 ppb (45) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 45.0
 
April 5, 2021, 3 p.m. 1.4 ppb (2) 0.1 ppb (1) 0.5 ppb (1) 1.0 ppb (1) 0.2 ppb (1) -1.0 ppb (0) 46.0 ppb (43) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 43.0
 
April 5, 2021, 2 p.m. 2.5 ppb (3) 0.3 ppb (1) 1.4 ppb (2) 2.0 ppb (2) 1.0 ppb (1) -1.0 ppb (0) 39.0 ppb (37) N/A 22.0 μg/m3 (21) 3.0 μg/m3 (13) 37.0
 
April 5, 2021, 1 p.m. 3.1 ppb (3) 0.1 ppb (1) 1.9 ppb (2) 3.0 ppb (3) 1.6 ppb (2) -1.0 ppb (0) 38.0 ppb (36) N/A 18.0 μg/m3 (17) 2.0 μg/m3 (9) 36.0
 
April 5, 2021, noon 2.4 ppb (3) -0.1 ppb (0) 1.1 ppb (2) 3.0 ppb (3) 1.1 ppb (2) -1.0 ppb (0) 35.0 ppb (33) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 33.0
 
April 5, 2021, 11 a.m. 1.7 ppb (2) -0.2 ppb (0) 0.5 ppb (1) 2.0 ppb (2) 0.5 ppb (1) -1.0 ppb (0) 38.0 ppb (36) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 36.0
 
April 5, 2021, 10 a.m. 1.8 ppb (2) -0.2 ppb (0) 0.8 ppb (1) 2.0 ppb (2) 0.8 ppb (1) -1.0 ppb (0) 38.0 ppb (36) N/A 10.0 μg/m3 (10) 1.0 μg/m3 (5) 36.0
 
April 5, 2021, 9 a.m. 1.4 ppb (2) -0.2 ppb (0) 0.4 ppb (1) 2.0 ppb (2) 0.4 ppb (1) -1.0 ppb (0) 40.0 ppb (38) N/A 10.0 μg/m3 (10) 0.0 μg/m3 (0) 38.0
 
April 5, 2021, 8 a.m. 2.0 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 2.0 ppb (2) 0.9 ppb (1) -1.0 ppb (0) 39.0 ppb (37) N/A 10.0 μg/m3 (10) 0.0 μg/m3 (0) 37.0
 
April 5, 2021, 7 a.m. 2.7 ppb (3) -0.2 ppb (0) 1.7 ppb (2) 3.0 ppb (3) 1.7 ppb (2) -1.0 ppb (0) 36.0 ppb (34) N/A 8.0 μg/m3 (8) 1.0 μg/m3 (5) 34.0
 
April 5, 2021, 6 a.m. 6.0 ppb (6) -0.1 ppb (0) 5.6 ppb (6) 6.0 ppb (6) 5.6 ppb (6) -1.0 ppb (0) 30.0 ppb (28) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 28.0
 
April 5, 2021, 5 a.m. 4.2 ppb (4) -0.1 ppb (0) 3.2 ppb (4) 4.0 ppb (4) 3.1 ppb (3) -1.0 ppb (0) 30.0 ppb (28) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 28.0
 
April 5, 2021, 4 a.m. 2.4 ppb (3) -0.2 ppb (0) 1.1 ppb (2) 3.0 ppb (3) 1.1 ppb (2) -1.0 ppb (0) 34.0 ppb (32) N/A 11.0 μg/m3 (11) 2.0 μg/m3 (9) 32.0
 
April 5, 2021, 3 a.m. 2.7 ppb (3) -0.2 ppb (0) 1.4 ppb (2) 3.0 ppb (3) 1.4 ppb (2) -1.0 ppb (0) 35.0 ppb (33) N/A 16.0 μg/m3 (15) 2.0 μg/m3 (9) 33.0
 
April 5, 2021, 2 a.m. 2.3 ppb (3) -0.2 ppb (0) 1.2 ppb (2) 3.0 ppb (3) 1.2 ppb (2) -1.0 ppb (0) 41.0 ppb (38) N/A 14.0 μg/m3 (13) 4.0 μg/m3 (17) 38.0
 
April 5, 2021, 1 a.m. 1.2 ppb (2) -0.2 ppb (0) 0.2 ppb (1) 1.0 ppb (1) 0.2 ppb (1) -1.0 ppb (0) 46.0 ppb (43) N/A 13.0 μg/m3 (13) 4.0 μg/m3 (17) 43.0
 
April 5, 2021, midnight 0.7 ppb (1) -0.2 ppb (0) -0.3 ppb (0) 1.0 ppb (1) -0.3 ppb (0) -1.0 ppb (0) 47.0 ppb (44) N/A 14.0 μg/m3 (13) 2.0 μg/m3 (9) 44.0
 
April 4, 2021, 11 p.m. 0.6 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 46.0 ppb (43) N/A 14.0 μg/m3 (13) -2.0 μg/m3 (0) 43.0
 
April 4, 2021, 10 p.m. 0.5 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 49.0 ppb (46) N/A 10.0 μg/m3 (10) -3.0 μg/m3 (0) 46.0
 
April 4, 2021, 9 p.m. 0.5 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 50.0 ppb (47) N/A 6.0 μg/m3 (6) 0.0 μg/m3 (0) 47.0
 
April 4, 2021, 8 p.m. 0.5 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 50.0 ppb (47) N/A 17.0 μg/m3 (16) 0.0 μg/m3 (0) 47.0
 
April 4, 2021, 7 p.m. 0.3 ppb (1) -0.2 ppb (0) -0.5 ppb (0) 0.0 ppb (0) -0.6 ppb (0) -1.0 ppb (0) 50.0 ppb (47) N/A 7.0 μg/m3 (7) 1.0 μg/m3 (5) 47.0
 
April 4, 2021, 6 p.m. 0.4 ppb (1) -0.2 ppb (0) -0.5 ppb (0) 1.0 ppb (1) -0.5 ppb (0) -1.0 ppb (0) 50.0 ppb (47) N/A 9.0 μg/m3 (9) 4.0 μg/m3 (17) 47.0
 
April 4, 2021, 5 p.m. 0.5 ppb (1) -0.2 ppb (0) -0.2 ppb (0) 1.0 ppb (1) -0.3 ppb (0) -1.0 ppb (0) 51.0 ppb (48) N/A 13.0 μg/m3 (13) 3.0 μg/m3 (13) 48.0
 
April 4, 2021, 4 p.m. 0.7 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 1.0 ppb (1) -0.1 ppb (0) -1.0 ppb (0) 50.0 ppb (47) N/A 16.0 μg/m3 (15) 2.0 μg/m3 (9) 47.0
 
April 4, 2021, 3 p.m. 1.6 ppb (2) 0.1 ppb (1) 0.7 ppb (1) 2.0 ppb (2) 0.5 ppb (1) -1.0 ppb (0) 46.0 ppb (43) N/A 16.0 μg/m3 (15) 3.0 μg/m3 (13) 43.0
 
April 4, 2021, 2 p.m. 2.6 ppb (3) 0.3 ppb (1) 1.6 ppb (2) 2.0 ppb (2) 1.1 ppb (2) -1.0 ppb (0) 42.0 ppb (39) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 39.0
 
April 4, 2021, 1 p.m. 2.8 ppb (3) 0.1 ppb (1) 1.7 ppb (2) 3.0 ppb (3) 1.4 ppb (2) -1.0 ppb (0) 41.0 ppb (38) N/A 7.0 μg/m3 (7) -1.0 μg/m3 (0) 38.0
 
April 4, 2021, noon 2.9 ppb (3) 0.0 ppb (0) 1.6 ppb (2) 3.0 ppb (3) 1.6 ppb (2) -1.0 ppb (0) 43.0 ppb (40) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 40.0
 
April 4, 2021, 11 a.m. 2.7 ppb (3) -0.2 ppb (0) 1.4 ppb (2) 3.0 ppb (3) 1.4 ppb (2) -1.0 ppb (0) 41.0 ppb (38) N/A 10.0 μg/m3 (10) 1.0 μg/m3 (5) 38.0
 
April 4, 2021, 10 a.m. 3.2 ppb (4) -0.2 ppb (0) 2.4 ppb (3) 3.0 ppb (3) 2.4 ppb (3) -1.0 ppb (0) 41.0 ppb (38) N/A 7.0 μg/m3 (7) -1.0 μg/m3 (0) 38.0
 
April 4, 2021, 9 a.m. 3.2 ppb (4) -0.1 ppb (0) 2.3 ppb (3) 3.0 ppb (3) 2.3 ppb (3) -1.0 ppb (0) 38.0 ppb (36) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 36.0
 
April 4, 2021, 8 a.m. 3.3 ppb (4) -0.1 ppb (0) 6.1 ppb (6) 3.0 ppb (3) 6.1 ppb (6) -1.0 ppb (0) 41.0 ppb (38) N/A 8.0 μg/m3 (8) 4.0 μg/m3 (17) 38.0
 
April 4, 2021, 7 a.m. 13.8 ppb (14) -0.1 ppb (0) 13.8 ppb (14) 14.0 ppb (14) 13.8 ppb (14) -1.0 ppb (0) 30.0 ppb (28) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 28.0
 
April 4, 2021, 6 a.m. 8.9 ppb (9) -0.1 ppb (0) 9.4 ppb (9) 9.0 ppb (9) 9.4 ppb (9) -1.0 ppb (0) 28.0 ppb (26) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 26.0
 
April 4, 2021, 5 a.m. 4.4 ppb (5) -0.1 ppb (0) 3.0 ppb (3) 5.0 ppb (5) 3.0 ppb (3) -1.0 ppb (0) 28.0 ppb (26) N/A 13.0 μg/m3 (13) 2.0 μg/m3 (9) 26.0
 
April 4, 2021, 4 a.m. 4.6 ppb (5) -0.1 ppb (0) 2.6 ppb (3) 5.0 ppb (5) 2.6 ppb (3) -1.0 ppb (0) 29.0 ppb (27) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (13) 27.0
 
April 4, 2021, 3 a.m. 5.4 ppb (6) -0.1 ppb (0) 3.5 ppb (4) 5.0 ppb (5) 3.4 ppb (4) -1.0 ppb (0) 31.0 ppb (29) N/A 36.0 μg/m3 (34) 3.0 μg/m3 (13) 34.0
 
April 4, 2021, 2 a.m. 3.7 ppb (4) -0.2 ppb (0) 2.2 ppb (3) 4.0 ppb (4) 2.2 ppb (3) -1.0 ppb (0) 39.0 ppb (37) N/A 24.0 μg/m3 (23) 4.0 μg/m3 (17) 37.0
 
April 4, 2021, 1 a.m. 1.9 ppb (2) -0.2 ppb (0) 0.6 ppb (1) 2.0 ppb (2) 0.6 ppb (1) -1.0 ppb (0) 45.0 ppb (42) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 42.0
 
April 4, 2021, midnight 0.7 ppb (1) -0.2 ppb (0) -0.3 ppb (0) 1.0 ppb (1) -0.3 ppb (0) -1.0 ppb (0) 51.0 ppb (48) N/A 9.0 μg/m3 (9) -1.0 μg/m3 (0) 48.0
 
April 3, 2021, 11 p.m. 0.4 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.5 ppb (0) -1.0 ppb (0) 53.0 ppb (50) N/A 13.0 μg/m3 (13) 2.0 μg/m3 (9) 50.0
 
April 3, 2021, 10 p.m. 0.4 ppb (1) -0.2 ppb (0) -0.5 ppb (0) 1.0 ppb (1) -0.5 ppb (0) -1.0 ppb (0) 53.0 ppb (50) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 50.0
 
April 3, 2021, 9 p.m. 0.4 ppb (1) -0.2 ppb (0) -0.5 ppb (0) 1.0 ppb (1) -0.5 ppb (0) -1.0 ppb (0) 53.0 ppb (50) N/A 9.0 μg/m3 (9) 0.0 μg/m3 (0) 50.0
 
April 3, 2021, 8 p.m. 0.4 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.5 ppb (0) -1.0 ppb (0) 54.0 ppb (50) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 50.0
 
April 3, 2021, 7 p.m. 0.4 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 54.0 ppb (50) N/A 8.0 μg/m3 (8) 1.0 μg/m3 (5) 50.0
 
April 3, 2021, 6 p.m. 0.6 ppb (1) -0.1 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 53.0 ppb (50) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 50.0
 
April 3, 2021, 5 p.m. 0.5 ppb (1) -0.1 ppb (0) -0.4 ppb (0) 1.0 ppb (1) -0.4 ppb (0) -1.0 ppb (0) 53.0 ppb (50) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 50.0
 
April 3, 2021, 4 p.m. 0.7 ppb (1) -0.1 ppb (0) -0.1 ppb (0) 1.0 ppb (1) -0.2 ppb (0) -1.0 ppb (0) 52.0 ppb (49) N/A 11.0 μg/m3 (11) -1.0 μg/m3 (0) 49.0
 
April 3, 2021, 3 p.m. 1.8 ppb (2) 0.1 ppb (1) 0.9 ppb (1) 2.0 ppb (2) 0.6 ppb (1) -1.0 ppb (0) 49.0 ppb (46) N/A 9.0 μg/m3 (9) -1.0 μg/m3 (0) 46.0
 
April 3, 2021, 2 p.m. 4.8 ppb (5) 1.0 ppb (1) 3.7 ppb (4) 4.0 ppb (4) 2.6 ppb (3) -1.0 ppb (0) 37.0 ppb (35) N/A 12.0 μg/m3 (12) 2.0 μg/m3 (9) 35.0
 
April 3, 2021, 1 p.m. 5.2 ppb (5) 0.4 ppb (1) 4.4 ppb (5) 5.0 ppb (5) 3.8 ppb (4) -1.0 ppb (0) 37.0 ppb (35) N/A 9.0 μg/m3 (9) 4.0 μg/m3 (17) 35.0
 
April 3, 2021, noon 3.2 ppb (4) -0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) 1.9 ppb (2) -1.0 ppb (0) 37.0 ppb (35) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 35.0
 
April 3, 2021, 11 a.m. 2.5 ppb (3) -0.2 ppb (0) 1.3 ppb (2) 3.0 ppb (3) 1.3 ppb (2) -1.0 ppb (0) 38.0 ppb (36) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 36.0
 
April 3, 2021, 10 a.m. 3.0 ppb (3) -0.2 ppb (0) 1.8 ppb (2) 3.0 ppb (3) 1.8 ppb (2) -1.0 ppb (0) 36.0 ppb (34) N/A 10.0 μg/m3 (10) 1.0 μg/m3 (5) 34.0
 
April 3, 2021, 9 a.m. 3.7 ppb (4) -0.1 ppb (0) 2.5 ppb (3) 4.0 ppb (4) 2.5 ppb (3) -1.0 ppb (0) 38.0 ppb (36) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 36.0