ID: 1803

AQSQID: 160010010

Site Name: St. Lukes Meridian

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

Updated: April 22, 2021, 9:43 a.m.

Location: Meridian (Whiteriver Dr), ID

Reporting: True, Located: True

Current AQI: 38.0

Meridian (Whiteriver Dr) ID, US: 43.600699, -116.347853

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 22, 2021, 8 a.m. 7.1 ppb (7) -0.1 ppb (0) 8.1 ppb (8) 7.0 ppb (7) 6.8 ppb (7) 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 22, 2021, 7 a.m. 10.5 ppb (10) 0.0 ppb (0) 11.6 ppb (11) 10.0 ppb (10) 9.4 ppb (9) 0.0 ppb (0) 28.0 ppb (26) 0.13 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
April 22, 2021, 6 a.m. 9.3 ppb (9) 0.1 ppb (1) 10.3 ppb (10) 9.0 ppb (9) 8.1 ppb (8) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
April 22, 2021, 5 a.m. 7.4 ppb (7) -0.1 ppb (0) 7.1 ppb (7) 8.0 ppb (8) 6.2 ppb (6) 0.0 ppb (0) 37.0 ppb (35) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 35.0
 
April 22, 2021, 4 a.m. 9.0 ppb (9) -0.5 ppb (0) 8.4 ppb (8) 9.0 ppb (9) 7.5 ppb (8) 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 22, 2021, 3 a.m. 6.3 ppb (6) -0.4 ppb (0) 6.8 ppb (7) 7.0 ppb (7) 6.1 ppb (6) 0.0 ppb (0) 41.0 ppb (38) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 38.0
 
April 22, 2021, 2 a.m. 3.5 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 46.0 ppb (43) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 43.0
 
April 22, 2021, 1 a.m. 2.0 ppb (2) -0.2 ppb (0) 2.8 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 49.0 ppb (46) 0.15 ppb (2) N/A 9.0 μg/m3 (38) 46.0
 
April 22, 2021, midnight 2.0 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 47.0
 
April 21, 2021, 11 p.m. 2.1 ppb (2) 0.0 ppb (0) 3.2 ppb (4) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 51.0 ppb (48) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 48.0
 
April 21, 2021, 10 p.m. 2.1 ppb (2) 0.1 ppb (1) 3.1 ppb (3) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 52.0 ppb (49) 0.14 ppb (2) N/A 8.0 μg/m3 (34) 49.0
 
April 21, 2021, 9 p.m. 2.8 ppb (3) 0.5 ppb (1) 4.6 ppb (5) 2.0 ppb (2) 2.7 ppb (3) 0.0 ppb (0) 53.0 ppb (50) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 50.0
 
April 21, 2021, 8 p.m. 2.5 ppb (3) 0.1 ppb (1) 4.1 ppb (4) 2.0 ppb (2) 2.4 ppb (3) 0.0 ppb (0) 52.0 ppb (49) 0.12 ppb (2) N/A 7.0 μg/m3 (30) 49.0
 
April 21, 2021, 7 p.m. 2.5 ppb (3) 0.5 ppb (1) 3.6 ppb (4) 2.0 ppb (2) 2.2 ppb (3) 0.0 ppb (0) 51.0 ppb (48) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 48.0
 
April 21, 2021, 6 p.m. 2.7 ppb (3) 0.5 ppb (1) 3.9 ppb (4) 2.0 ppb (2) 2.3 ppb (3) 0.0 ppb (0) 49.0 ppb (46) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 46.0
 
April 21, 2021, 5 p.m. 3.0 ppb (3) 0.7 ppb (1) 3.9 ppb (4) 2.0 ppb (2) 2.3 ppb (3) 0.0 ppb (0) 46.0 ppb (43) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 43.0
 
April 21, 2021, 4 p.m. 2.8 ppb (3) 0.7 ppb (1) 3.4 ppb (4) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 43.0 ppb (40) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 40.0
 
April 21, 2021, 3 p.m. 8.7 ppb (9) 2.4 ppb (3) 8.9 ppb (9) 6.0 ppb (6) 5.4 ppb (6) 0.0 ppb (0) 36.0 ppb (34) 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 21, 2021, 2 p.m. 36.5 ppb (35) 12.1 ppb (12) 34.4 ppb (33) 24.0 ppb (23) 19.4 ppb (19) 1.0 ppb (2) 17.0 ppb (16) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 1 p.m. 40.4 ppb (39) 10.6 ppb (10) 38.8 ppb (37) 30.0 ppb (29) 24.6 ppb (24) 0.0 ppb (0) 8.0 ppb (8) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 39.0
 
April 21, 2021, noon 20.7 ppb (20) 0.8 ppb (1) 20.5 ppb (20) 20.0 ppb (19) 16.9 ppb (16) 0.0 ppb (0) 16.0 ppb (15) 0.18 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 11 a.m. 22.4 ppb (22) 0.9 ppb (1) 17.5 ppb (17) 21.0 ppb (20) 14.7 ppb (14) 0.0 ppb (0) 16.0 ppb (15) 0.14 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 10 a.m. 15.2 ppb (15) 0.7 ppb (1) 13.9 ppb (14) 15.0 ppb (15) 11.5 ppb (11) 0.0 ppb (0) 17.0 ppb (16) 0.13 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 21, 2021, 9 a.m. 10.3 ppb (10) 0.0 ppb (0) 10.0 ppb (10) 10.0 ppb (10) 8.4 ppb (8) 0.0 ppb (0) 23.0 ppb (22) 0.13 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
April 21, 2021, 8 a.m. 21.1 ppb (20) 0.6 ppb (1) 17.4 ppb (17) 21.0 ppb (20) 15.0 ppb (15) 0.0 ppb (0) 13.0 ppb (13) 0.19 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 21, 2021, 7 a.m. 16.5 ppb (16) 0.8 ppb (1) 14.2 ppb (14) 16.0 ppb (16) 12.0 ppb (12) 0.0 ppb (0) 17.0 ppb (16) 0.18 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
April 21, 2021, 6 a.m. 30.8 ppb (30) 4.3 ppb (5) 24.3 ppb (23) 26.0 ppb (25) 19.3 ppb (19) 0.0 ppb (0) 10.0 ppb (10) 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
April 21, 2021, 5 a.m. 47.3 ppb (45) 9.3 ppb (9) 44.7 ppb (43) 38.0 ppb (36) 30.9 ppb (30) 1.0 ppb (2) 5.0 ppb (5) 0.38 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
April 21, 2021, 4 a.m. 28.0 ppb (27) 0.8 ppb (1) 25.3 ppb (24) 27.0 ppb (26) 21.3 ppb (21) 0.0 ppb (0) 17.0 ppb (16) 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 21, 2021, 3 a.m. 9.0 ppb (9) -0.2 ppb (0) 10.4 ppb (10) 9.0 ppb (9) 8.9 ppb (9) 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) N/A 6.0 μg/m3 (25) 34.0
 
April 21, 2021, 2 a.m. 3.5 ppb (4) 0.0 ppb (0) 3.9 ppb (4) 4.0 ppb (4) 3.0 ppb (3) 0.0 ppb (0) 45.0 ppb (42) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 42.0
 
April 21, 2021, 1 a.m. 2.1 ppb (2) 0.0 ppb (0) 2.9 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 43.0
 
April 21, 2021, midnight 1.7 ppb (2) 0.0 ppb (0) 2.8 ppb (3) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 44.0
 
April 20, 2021, 11 p.m. 1.9 ppb (2) -0.1 ppb (0) 3.3 ppb (4) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 49.0 ppb (46) 0.13 ppb (2) N/A 4.0 μg/m3 (17) 46.0
 
April 20, 2021, 10 p.m. 1.8 ppb (2) -0.1 ppb (0) 3.0 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 49.0 ppb (46) 0.12 ppb (2) N/A 6.0 μg/m3 (25) 46.0
 
April 20, 2021, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) 3.1 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 49.0 ppb (46) 0.12 ppb (2) N/A 6.0 μg/m3 (25) 46.0
 
April 20, 2021, 8 p.m. 1.7 ppb (2) 0.0 ppb (0) 2.8 ppb (3) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 44.0
 
April 20, 2021, 7 p.m. 1.4 ppb (2) 0.0 ppb (0) 2.2 ppb (3) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 43.0
 
April 20, 2021, 6 p.m. 1.7 ppb (2) 0.2 ppb (1) 2.5 ppb (3) 1.0 ppb (1) 1.4 ppb (2) 0.0 ppb (0) 43.0 ppb (40) 0.09 ppb (2) N/A 5.0 μg/m3 (21) 40.0
 
April 20, 2021, 5 p.m. 2.8 ppb (3) 0.7 ppb (1) 3.3 ppb (4) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 41.0 ppb (38) 0.09 ppb (2) N/A 8.0 μg/m3 (34) 38.0
 
April 20, 2021, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) 4.3 ppb (5) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 39.0 ppb (37) 0.09 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
April 20, 2021, 3 p.m. 5.4 ppb (6) 1.8 ppb (2) 5.2 ppb (5) 4.0 ppb (4) 2.9 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.09 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
April 20, 2021, 2 p.m. 8.8 ppb (9) 2.2 ppb (3) 8.8 ppb (9) 7.0 ppb (7) 5.4 ppb (6) 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
April 20, 2021, 1 p.m. 11.2 ppb (11) 1.6 ppb (2) 11.1 ppb (11) 10.0 ppb (10) 7.7 ppb (8) 0.0 ppb (0) 28.0 ppb (26) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
April 20, 2021, noon 7.7 ppb (8) 1.0 ppb (1) 7.2 ppb (7) 7.0 ppb (7) 5.2 ppb (5) 0.0 ppb (0) 31.0 ppb (29) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
April 20, 2021, 11 a.m. 3.9 ppb (4) 0.3 ppb (1) 3.8 ppb (4) 4.0 ppb (4) 2.9 ppb (3) 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
April 20, 2021, 10 a.m. 1.8 ppb (2) -0.1 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.07 ppb (2) N/A 5.0 μg/m3 (21) 34.0
 
April 20, 2021, 9 a.m. 1.4 ppb (2) -0.1 ppb (0) 1.5 ppb (2) 1.0 ppb (1) 1.3 ppb (2) 0.0 ppb (0) 37.0 ppb (35) 0.06 ppb (2) N/A 5.0 μg/m3 (21) 35.0
 
April 20, 2021, 8 a.m. 1.6 ppb (2) -0.1 ppb (0) 1.6 ppb (2) 2.0 ppb (2) 1.3 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.07 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
April 20, 2021, 7 a.m. 1.1 ppb (2) 0.0 ppb (0) 1.2 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.09 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 6 a.m. 2.3 ppb (3) -0.2 ppb (0) 2.2 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
April 20, 2021, 5 a.m. 2.9 ppb (3) -0.4 ppb (0) 3.3 ppb (4) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 34.0 ppb (32) 0.12 ppb (2) N/A 1.0 μg/m3 (5) 32.0
 
April 20, 2021, 4 a.m. 2.5 ppb (3) -0.5 ppb (0) 2.8 ppb (3) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 36.0
 
April 20, 2021, 3 a.m. 2.1 ppb (2) -0.3 ppb (0) 2.4 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 41.0 ppb (38) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
April 20, 2021, 2 a.m. 1.8 ppb (2) -0.3 ppb (0) 2.2 ppb (3) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.08 ppb (2) N/A 5.0 μg/m3 (21) 42.0
 
April 20, 2021, 1 a.m. 1.5 ppb (2) -0.1 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 1.1 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.07 ppb (2) N/A 4.0 μg/m3 (17) 44.0
 
April 20, 2021, midnight 1.6 ppb (2) 0.1 ppb (1) 2.7 ppb (3) 2.0 ppb (2) 1.0 ppb (1) 0.0 ppb (0) 48.0 ppb (45) 0.07 ppb (2) N/A 2.0 μg/m3 (9) 45.0
 
April 19, 2021, 11 p.m. 1.7 ppb (2) 0.3 ppb (1) 1.8 ppb (2) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.06 ppb (2) N/A 3.0 μg/m3 (13) 44.0
 
April 19, 2021, 10 p.m. 1.3 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
April 19, 2021, 9 p.m. 1.3 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 19, 2021, 8 p.m. 1.3 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
April 19, 2021, 7 p.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 19, 2021, 6 p.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 7.0 μg/m3 (30) 43.0
 
April 19, 2021, 5 p.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 28.0 μg/m3 (85) 85.0
 
April 19, 2021, 4 p.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 16.0 μg/m3 (60) 60.0
 
April 19, 2021, 3 p.m. 5.9 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 2 p.m. 17.5 ppb (17) 3.9 ppb (4) 15.0 ppb (15) 14.0 ppb (14) 10.0 ppb (10) 0.0 ppb (0) 28.0 ppb (26) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 1 p.m. 22.1 ppb (21) 3.2 ppb (4) 19.7 ppb (19) 19.0 ppb (18) 14.6 ppb (14) 0.0 ppb (0) 21.0 ppb (20) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, noon 8.3 ppb (8) -0.2 ppb (0) 7.7 ppb (8) 9.0 ppb (9) 6.7 ppb (7) 0.0 ppb (0) 31.0 ppb (29) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 11 a.m. 13.7 ppb (13) 1.9 ppb (2) 9.6 ppb (10) 12.0 ppb (12) 8.3 ppb (8) 0.0 ppb (0) 22.0 ppb (21) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 19, 2021, 10 a.m. 27.3 ppb (26) 8.3 ppb (8) 22.8 ppb (22) 19.0 ppb (18) 14.8 ppb (14) 0.0 ppb (0) 3.0 ppb (3) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 9 a.m. 23.0 ppb (22) 3.3 ppb (4) 21.4 ppb (21) 20.0 ppb (19) 16.2 ppb (16) 0.0 ppb (0) 6.0 ppb (6) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 19, 2021, 8 a.m. 16.8 ppb (16) 0.7 ppb (1) 15.6 ppb (15) 16.0 ppb (16) 13.0 ppb (13) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 7 a.m. 19.3 ppb (19) 1.8 ppb (2) 13.8 ppb (14) 17.0 ppb (17) 11.7 ppb (12) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 6 a.m. 30.7 ppb (29) 4.2 ppb (4) 29.9 ppb (29) 26.0 ppb (25) 21.5 ppb (21) 0.0 ppb (0) 6.0 ppb (6) 0.51 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 19, 2021, 5 a.m. 32.9 ppb (32) 3.3 ppb (4) 25.7 ppb (25) 30.0 ppb (29) 21.0 ppb (20) 0.0 ppb (0) 8.0 ppb (8) 0.85 ppb (10) N/A 14.0 μg/m3 (55) 55.0
 
April 19, 2021, 4 a.m. 57.6 ppb (55) 14.4 ppb (14) 45.3 ppb (43) 43.0 ppb (41) 30.3 ppb (29) 1.0 ppb (2) 3.0 ppb (3) 1.1 ppb (13) N/A 5.0 μg/m3 (21) 55.0
 
April 19, 2021, 3 a.m. 36.4 ppb (35) 2.4 ppb (3) 33.0 ppb (32) 34.0 ppb (33) 26.1 ppb (25) 0.0 ppb (0) 13.0 ppb (13) 1.06 ppb (13) N/A 5.0 μg/m3 (21) 35.0
 
April 19, 2021, 2 a.m. 5.2 ppb (5) -0.1 ppb (0) 4.5 ppb (5) 5.0 ppb (5) 3.6 ppb (4) 0.0 ppb (0) 41.0 ppb (38) 1.03 ppb (12) N/A 3.0 μg/m3 (13) 38.0
 
April 19, 2021, 1 a.m. 1.5 ppb (2) -0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) 1.2 ppb (2) 0.0 ppb (0) 48.0 ppb (45) 0.98 ppb (12) N/A 1.0 μg/m3 (5) 45.0
 
April 19, 2021, midnight 0.9 ppb (1) -0.2 ppb (0) 1.9 ppb (2) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 48.0 ppb (45) 0.89 ppb (11) N/A -1.0 μg/m3 (0) 45.0
 
April 18, 2021, 11 p.m. 0.8 ppb (1) -0.3 ppb (0) 2.1 ppb (2) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 49.0 ppb (46) 0.68 ppb (8) N/A 0.0 μg/m3 (0) 46.0
 
April 18, 2021, 10 p.m. 0.9 ppb (1) -0.2 ppb (0) 2.2 ppb (3) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 49.0 ppb (46) 0.28 ppb (4) N/A 1.0 μg/m3 (5) 46.0
 
April 18, 2021, 9 p.m. 1.2 ppb (2) 0.2 ppb (1) 2.3 ppb (3) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 48.0 ppb (45) 0.08 ppb (2) N/A 2.0 μg/m3 (9) 45.0
 
April 18, 2021, 8 p.m. 1.1 ppb (2) -0.1 ppb (0) 2.6 ppb (3) 1.0 ppb (1) 1.2 ppb (2) 0.0 ppb (0) 49.0 ppb (46) 0.07 ppb (2) N/A 4.0 μg/m3 (17) 46.0
 
April 18, 2021, 7 p.m. 1.3 ppb (2) -0.1 ppb (0) 2.7 ppb (3) 1.0 ppb (1) 1.5 ppb (2) 0.0 ppb (0) 51.0 ppb (48) 0.07 ppb (2) N/A 6.0 μg/m3 (25) 48.0
 
April 18, 2021, 6 p.m. 1.6 ppb (2) 0.2 ppb (1) 2.5 ppb (3) 1.0 ppb (1) 1.6 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.06 ppb (2) N/A 4.0 μg/m3 (17) 47.0
 
April 18, 2021, 5 p.m. 3.2 ppb (4) 0.6 ppb (1) 4.3 ppb (5) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 45.0 ppb (42) 0.07 ppb (2) N/A 5.0 μg/m3 (21) 42.0
 
April 18, 2021, 4 p.m. 4.2 ppb (4) 0.8 ppb (1) 4.8 ppb (5) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 40.0 ppb (38) 0.07 ppb (2) N/A 7.0 μg/m3 (30) 38.0
 
April 18, 2021, 3 p.m. 6.7 ppb (7) 1.7 ppb (2) 6.4 ppb (7) 5.0 ppb (5) 4.1 ppb (4) 0.0 ppb (0) 31.0 ppb (29) 0.07 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, 2 p.m. 9.9 ppb (10) 2.2 ppb (3) 9.6 ppb (10) 8.0 ppb (8) 6.2 ppb (6) 0.0 ppb (0) 24.0 ppb (23) 0.07 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 1 p.m. 19.2 ppb (19) 3.3 ppb (4) 16.7 ppb (16) 16.0 ppb (16) 12.2 ppb (12) 0.0 ppb (0) 14.0 ppb (13) 0.12 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, noon 20.6 ppb (20) 2.7 ppb (3) 19.1 ppb (19) 18.0 ppb (17) 14.5 ppb (14) 0.0 ppb (0) 5.0 ppb (5) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 18, 2021, 11 a.m. 13.2 ppb (13) 0.4 ppb (1) 12.3 ppb (12) 13.0 ppb (13) 10.2 ppb (10) 0.0 ppb (0) 9.0 ppb (9) 0.09 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 10 a.m. 11.2 ppb (11) -0.1 ppb (0) 9.4 ppb (9) 11.0 ppb (11) 8.2 ppb (8) 0.0 ppb (0) 17.0 ppb (16) 0.1 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 9 a.m. 8.6 ppb (9) -0.1 ppb (0) 7.6 ppb (8) 9.0 ppb (9) 6.9 ppb (7) 0.0 ppb (0) 24.0 ppb (23) 0.11 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, 8 a.m. 10.6 ppb (10) -0.5 ppb (0) 8.8 ppb (9) 11.0 ppb (11) 7.9 ppb (8) 0.0 ppb (0) 23.0 ppb (22) 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 7 a.m. 17.5 ppb (17) 0.2 ppb (1) 16.3 ppb (16) 17.0 ppb (17) 14.3 ppb (14) 0.0 ppb (0) 19.0 ppb (18) 0.22 ppb (3) N/A 17.0 μg/m3 (62) 62.0
 
April 18, 2021, 6 a.m. 26.1 ppb (25) 1.5 ppb (2) 22.0 ppb (21) 25.0 ppb (24) 18.5 ppb (18) 0.0 ppb (0) 16.0 ppb (15) 0.46 ppb (6) N/A 27.0 μg/m3 (83) 83.0
 
April 18, 2021, 5 a.m. 29.8 ppb (29) 1.3 ppb (2) 23.9 ppb (23) 28.0 ppb (27) 20.1 ppb (19) 0.0 ppb (0) 16.0 ppb (15) 0.17 ppb (3) N/A 24.0 μg/m3 (77) 77.0
 
April 18, 2021, 4 a.m. 36.4 ppb (35) 0.9 ppb (1) 26.6 ppb (26) 35.0 ppb (34) 23.0 ppb (22) 0.0 ppb (0) 14.0 ppb (13) 0.37 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 18, 2021, 3 a.m. 48.5 ppb (46) 6.3 ppb (6) 33.1 ppb (32) N/A 27.2 ppb (26) 1.0 ppb (2) 13.0 ppb (13) 0.68 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
April 18, 2021, 2 a.m. 5.3 ppb (5) -0.4 ppb (0) 5.8 ppb (6) 6.0 ppb (6) 4.7 ppb (5) 0.0 ppb (0) 47.0 ppb (44) 0.37 ppb (5) N/A 3.0 μg/m3 (13) 44.0
 
April 18, 2021, 1 a.m. 2.7 ppb (3) -0.1 ppb (0) 3.4 ppb (4) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 51.0 ppb (48) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 48.0
 
April 18, 2021, midnight 1.8 ppb (2) -0.1 ppb (0) 3.1 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 53.0 ppb (50) 0.14 ppb (2) N/A 1.0 μg/m3 (5) 50.0
 
April 17, 2021, 11 p.m. 1.2 ppb (2) -0.4 ppb (0) 2.8 ppb (3) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 54.0 ppb (50) 0.12 ppb (2) N/A 2.0 μg/m3 (9) 50.0
 
April 17, 2021, 10 p.m. 1.4 ppb (2) -0.1 ppb (0) 2.4 ppb (3) 1.0 ppb (1) 1.3 ppb (2) 0.0 ppb (0) 53.0 ppb (50) 0.11 ppb (2) N/A 2.0 μg/m3 (9) 50.0
 
April 17, 2021, 9 p.m. 1.3 ppb (2) -0.3 ppb (0) 2.5 ppb (3) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 52.0 ppb (49) 0.11 ppb (2) N/A 3.0 μg/m3 (13) 49.0
 
April 17, 2021, 8 p.m. 1.6 ppb (2) 0.0 ppb (0) 2.4 ppb (3) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 51.0 ppb (48) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 48.0
 
April 17, 2021, 7 p.m. 1.8 ppb (2) 0.3 ppb (1) 2.3 ppb (3) 1.0 ppb (1) 1.3 ppb (2) 0.0 ppb (0) 48.0 ppb (45) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 45.0
 
April 17, 2021, 6 p.m. 1.0 ppb (1) 0.1 ppb (1) 1.7 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 47.0 ppb (44) 0.09 ppb (2) N/A 2.0 μg/m3 (9) 44.0
 
April 17, 2021, 5 p.m. 1.3 ppb (2) -0.1 ppb (0) 2.4 ppb (3) 1.0 ppb (1) 1.5 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.08 ppb (2) N/A 5.0 μg/m3 (21) 41.0
 
April 17, 2021, 4 p.m. 2.8 ppb (3) 0.5 ppb (1) 3.6 ppb (4) 2.0 ppb (2) 2.2 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.09 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
April 17, 2021, 3 p.m. 6.1 ppb (6) 1.4 ppb (2) 6.3 ppb (6) 5.0 ppb (5) 4.0 ppb (4) 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 32.0
 
April 17, 2021, 2 p.m. 8.6 ppb (9) 1.6 ppb (2) 8.3 ppb (8) 7.0 ppb (7) 5.7 ppb (6) 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
April 17, 2021, 1 p.m. 6.9 ppb (7) 0.4 ppb (1) 7.1 ppb (7) 7.0 ppb (7) 5.4 ppb (6) 0.0 ppb (0) 29.0 ppb (27) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
April 17, 2021, noon 7.2 ppb (7) -0.2 ppb (0) 6.8 ppb (7) 7.0 ppb (7) 5.9 ppb (6) 0.0 ppb (0) 29.0 ppb (27) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 27.0
 
April 17, 2021, 11 a.m. 4.0 ppb (4) -0.3 ppb (0) 4.4 ppb (5) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 33.0 ppb (31) 0.09 ppb (2) N/A 2.0 μg/m3 (9) 31.0
 
April 17, 2021, 10 a.m. 3.7 ppb (4) -0.2 ppb (0) 3.9 ppb (4) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 34.0 ppb (32) 0.07 ppb (2) N/A 6.0 μg/m3 (25) 32.0
 
April 17, 2021, 9 a.m. 3.7 ppb (4) -0.3 ppb (0) 4.1 ppb (4) 4.0 ppb (4) 3.7 ppb (4) 0.0 ppb (0) 34.0 ppb (32) 0.08 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
April 17, 2021, 8 a.m. 3.5 ppb (4) -0.8 ppb (0) 4.3 ppb (5) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) 35.0 ppb (33) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 33.0
 
April 17, 2021, 7 a.m. 9.9 ppb (10) -0.1 ppb (0) 8.9 ppb (9) 10.0 ppb (10) 7.9 ppb (8) 0.0 ppb (0) 31.0 ppb (29) 0.13 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 6 a.m. 19.5 ppb (19) 0.4 ppb (1) 17.9 ppb (17) 19.0 ppb (18) 15.5 ppb (15) 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 17, 2021, 5 a.m. 34.6 ppb (33) 1.5 ppb (2) 29.3 ppb (28) 33.0 ppb (32) 25.3 ppb (24) 0.0 ppb (0) 16.0 ppb (15) 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 4 a.m. 45.8 ppb (44) 4.8 ppb (5) 42.1 ppb (40) 41.0 ppb (39) 32.5 ppb (31) 0.0 ppb (0) 8.0 ppb (8) 0.45 ppb (6) N/A 6.0 μg/m3 (25) 44.0
 
April 17, 2021, 3 a.m. 37.4 ppb (36) 1.7 ppb (2) 30.4 ppb (29) 36.0 ppb (34) 26.1 ppb (25) 0.0 ppb (0) 18.0 ppb (17) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 36.0
 
April 17, 2021, 2 a.m. 7.8 ppb (8) -0.2 ppb (0) 8.7 ppb (9) 8.0 ppb (8) 7.2 ppb (7) 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 42.0
 
April 17, 2021, 1 a.m. 3.7 ppb (4) 0.1 ppb (1) 4.2 ppb (4) 4.0 ppb (4) 3.0 ppb (3) 0.0 ppb (0) 52.0 ppb (49) 0.13 ppb (2) N/A 2.0 μg/m3 (9) 49.0
 
April 17, 2021, midnight 3.3 ppb (4) 0.1 ppb (1) 4.4 ppb (5) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 53.0 ppb (50) 0.12 ppb (2) N/A 5.0 μg/m3 (21) 50.0
 
April 16, 2021, 11 p.m. 3.9 ppb (4) 0.6 ppb (1) 4.5 ppb (5) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 52.0 ppb (49) 0.13 ppb (2) N/A 5.0 μg/m3 (21) 49.0
 
April 16, 2021, 10 p.m. 2.7 ppb (3) 0.1 ppb (1) 4.1 ppb (4) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 54.0 ppb (50) 0.12 ppb (2) N/A 5.0 μg/m3 (21) 50.0
 
April 16, 2021, 9 p.m. 2.1 ppb (2) 0.1 ppb (1) 3.2 ppb (4) 2.0 ppb (2) 2.2 ppb (3) 0.0 ppb (0) 53.0 ppb (50) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 50.0
 
April 16, 2021, 8 p.m. 2.7 ppb (3) 0.6 ppb (1) 3.4 ppb (4) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.11 ppb (2) N/A 2.0 μg/m3 (9) 47.0
 
April 16, 2021, 7 p.m. 2.6 ppb (3) 0.4 ppb (1) 3.3 ppb (4) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 48.0 ppb (45) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 45.0
 
April 16, 2021, 6 p.m. 1.6 ppb (2) 0.2 ppb (1) 2.6 ppb (3) 1.0 ppb (1) 1.6 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.09 ppb (2) N/A 6.0 μg/m3 (25) 43.0
 
April 16, 2021, 5 p.m. 3.7 ppb (4) 0.6 ppb (1) 4.4 ppb (5) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 42.0 ppb (39) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
April 16, 2021, 4 p.m. 2.9 ppb (3) 0.7 ppb (1) 3.6 ppb (4) 2.0 ppb (2) 2.2 ppb (3) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) N/A 4.0 μg/m3 (17) 39.0
 
April 16, 2021, 3 p.m. 13.8 ppb (14) 3.4 ppb (4) 13.7 ppb (13) 10.0 ppb (10) 8.5 ppb (9) 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
April 16, 2021, 2 p.m. 26.0 ppb (25) 7.9 ppb (8) 25.6 ppb (25) 18.0 ppb (17) 15.3 ppb (15) 0.0 ppb (0) 16.0 ppb (15) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 16, 2021, 1 p.m. 37.4 ppb (36) 9.3 ppb (9) 31.5 ppb (30) 28.0 ppb (27) 21.7 ppb (21) 0.0 ppb (0) 6.0 ppb (6) 0.27 ppb (4) N/A 6.0 μg/m3 (25) 36.0
 
April 16, 2021, noon 21.3 ppb (21) 3.0 ppb (3) 20.8 ppb (20) 18.0 ppb (17) 15.5 ppb (15) 0.0 ppb (0) 14.0 ppb (13) 0.19 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 16, 2021, 11 a.m. 7.5 ppb (8) -0.7 ppb (0) 8.6 ppb (9) 8.0 ppb (8) 7.6 ppb (8) 0.0 ppb (0) 24.0 ppb (23) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 16, 2021, 10 a.m. 4.0 ppb (4) -0.3 ppb (0) 4.6 ppb (5) 4.0 ppb (4) 4.1 ppb (4) 0.0 ppb (0) 31.0 ppb (29) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 29.0
 
April 16, 2021, 9 a.m. 2.8 ppb (3) -0.3 ppb (0) 3.2 ppb (4) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 32.0 ppb (30) 0.09 ppb (2) N/A 4.0 μg/m3 (17) 30.0
 
April 16, 2021, 8 a.m. 1.8 ppb (2) -0.3 ppb (0) 2.6 ppb (3) 2.0 ppb (2) 2.2 ppb (3) 0.0 ppb (0) 36.0 ppb (34) 0.09 ppb (2) N/A 7.0 μg/m3 (30) 34.0
 
April 16, 2021, 7 a.m. 1.8 ppb (2) -0.1 ppb (0) 2.5 ppb (3) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.1 ppb (2) N/A 8.0 μg/m3 (34) 36.0
 
April 16, 2021, 6 a.m. 4.6 ppb (5) -0.2 ppb (0) 5.1 ppb (5) 5.0 ppb (5) 4.4 ppb (5) 0.0 ppb (0) 32.0 ppb (30) 0.13 ppb (2) N/A 2.0 μg/m3 (9) 30.0
 
April 16, 2021, 5 a.m. 6.0 ppb (6) -0.2 ppb (0) 6.4 ppb (7) 6.0 ppb (6) 5.6 ppb (6) 0.0 ppb (0) 31.0 ppb (29) 0.14 ppb (2) N/A 1.0 μg/m3 (5) 29.0
 
April 16, 2021, 4 a.m. 13.4 ppb (13) 0.2 ppb (1) 12.6 ppb (12) 13.0 ppb (13) 10.7 ppb (11) 0.0 ppb (0) 28.0 ppb (26) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 26.0
 
April 16, 2021, 3 a.m. 12.5 ppb (12) 0.0 ppb (0) 12.2 ppb (12) 13.0 ppb (13) 10.3 ppb (10) 0.0 ppb (0) 29.0 ppb (27) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 27.0
 
April 16, 2021, 2 a.m. 4.1 ppb (4) 0.1 ppb (1) 4.6 ppb (5) 4.0 ppb (4) 3.6 ppb (4) 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) N/A 1.0 μg/m3 (5) 37.0
 
April 16, 2021, 1 a.m. 1.2 ppb (2) -0.3 ppb (0) 2.2 ppb (3) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 43.0 ppb (40) 0.12 ppb (2) N/A 1.0 μg/m3 (5) 40.0
 
April 16, 2021, midnight 2.1 ppb (2) 0.3 ppb (1) 2.7 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.12 ppb (2) N/A 3.0 μg/m3 (13) 41.0
 
April 15, 2021, 11 p.m. 2.0 ppb (2) 0.3 ppb (1) 2.9 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 42.0
 
April 15, 2021, 10 p.m. 1.7 ppb (2) 0.0 ppb (0) 2.9 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.12 ppb (2) N/A 2.0 μg/m3 (9) 43.0
 
April 15, 2021, 9 p.m. 1.7 ppb (2) 0.1 ppb (1) 2.9 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.11 ppb (2) N/A 3.0 μg/m3 (13) 44.0
 
April 15, 2021, 8 p.m. 1.6 ppb (2) 0.0 ppb (0) 2.9 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.11 ppb (2) N/A 3.0 μg/m3 (13) 44.0
 
April 15, 2021, 7 p.m. 2.2 ppb (3) 0.2 ppb (1) 3.5 ppb (4) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.11 ppb (2) N/A 3.0 μg/m3 (13) 42.0
 
April 15, 2021, 6 p.m. 3.7 ppb (4) 0.6 ppb (1) 4.7 ppb (5) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 43.0 ppb (40) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 40.0
 
April 15, 2021, 5 p.m. 2.7 ppb (3) 0.6 ppb (1) 3.5 ppb (4) 2.0 ppb (2) 2.3 ppb (3) 0.0 ppb (0) 40.0 ppb (38) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 38.0
 
April 15, 2021, 4 p.m. 5.3 ppb (5) 1.2 ppb (2) 5.3 ppb (5) 4.0 ppb (4) 3.6 ppb (4) 0.0 ppb (0) 35.0 ppb (33) 0.12 ppb (2) N/A 7.0 μg/m3 (30) 33.0
 
April 15, 2021, 3 p.m. 21.4 ppb (21) 6.4 ppb (7) 20.5 ppb (20) 15.0 ppb (15) 12.6 ppb (12) 0.0 ppb (0) 22.0 ppb (21) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 15, 2021, 2 p.m. 37.3 ppb (36) 11.3 ppb (11) 36.9 ppb (35) 26.0 ppb (25) 22.1 ppb (21) 0.0 ppb (0) 12.0 ppb (12) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 36.0
 
April 15, 2021, 1 p.m. 34.3 ppb (33) 9.9 ppb (10) 34.0 ppb (33) 24.0 ppb (23) 21.3 ppb (21) 0.0 ppb (0) 9.0 ppb (9) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 33.0
 
April 15, 2021, noon 20.6 ppb (20) 3.2 ppb (4) 20.1 ppb (19) 17.0 ppb (17) 14.7 ppb (14) 0.0 ppb (0) 13.0 ppb (13) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
April 15, 2021, 11 a.m. 14.2 ppb (14) 1.0 ppb (1) 13.5 ppb (13) 13.0 ppb (13) 10.4 ppb (10) 0.0 ppb (0) 21.0 ppb (20) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 20.0
 
April 15, 2021, 10 a.m. 6.7 ppb (7) 0.0 ppb (0) 7.6 ppb (8) 7.0 ppb (7) 5.7 ppb (6) 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 1.0 μg/m3 (5) 28.0
 
April 15, 2021, 9 a.m. 2.5 ppb (3) -0.4 ppb (0) 2.9 ppb (3) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 37.0 ppb (35) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 35.0