ID: 1118

AQSQID: 295100085

Site Name: Blair Street

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

Updated: Sept. 22, 2021, 5:01 p.m.

Location: Saint Louis (Hyde Park), MO

Reporting: True, Located: True

Current AQI: 13.0

Saint Louis (Hyde Park) MO, US: 38.656449, -90.198548

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 22, 2021, 3 p.m. N/A N/A 5.1 ppb (5) N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 2.3 μg/m3 (10) 13.0
 
Sept. 22, 2021, 2 p.m. 10.0 ppb (10) 4.0 ppb (4) 9.3 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.24 ppb (3) 13.0 μg/m3 (13) 4.0 μg/m3 (17) 17.0
 
Sept. 22, 2021, 1 p.m. 7.0 ppb (7) 2.8 ppb (3) 6.3 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (15) 0.24 ppb (3) 12.0 μg/m3 (12) 5.3 μg/m3 (23) 23.0
 
Sept. 22, 2021, noon 9.8 ppb (10) 2.5 ppb (3) 6.8 ppb (7) 8.0 ppb (8) N/A 0.0 ppb (0) 14.0 ppb (13) 0.25 ppb (3) 12.0 μg/m3 (12) 5.3 μg/m3 (23) 23.0
 
Sept. 22, 2021, 11 a.m. 4.6 ppb (5) 0.9 ppb (1) 3.9 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 17.0 ppb (16) 0.29 ppb (4) 12.0 μg/m3 (12) 0.4 μg/m3 (2) 16.0
 
Sept. 22, 2021, 10 a.m. 5.8 ppb (6) 0.4 ppb (1) 5.1 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) 0.19 ppb (3) 14.0 μg/m3 (13) 3.9 μg/m3 (17) 17.0
 
Sept. 22, 2021, 9 a.m. 5.2 ppb (5) 0.4 ppb (1) 4.6 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.19 ppb (3) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 17.0
 
Sept. 22, 2021, 8 a.m. 4.9 ppb (5) 0.4 ppb (1) 4.3 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (17) 0.18 ppb (3) 13.0 μg/m3 (13) 4.5 μg/m3 (19) 19.0
 
Sept. 22, 2021, 7 a.m. 4.3 ppb (5) 0.4 ppb (1) 3.8 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (19) 0.18 ppb (3) 13.0 μg/m3 (13) 1.0 μg/m3 (5) 19.0
 
Sept. 22, 2021, 6 a.m. 4.1 ppb (4) 0.5 ppb (1) 3.6 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (20) 0.18 ppb (3) 12.0 μg/m3 (12) 1.3 μg/m3 (6) 20.0
 
Sept. 22, 2021, 5 a.m. 5.7 ppb (6) 0.4 ppb (1) 5.0 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (19) 0.22 ppb (3) 12.0 μg/m3 (12) -0.3 μg/m3 (0) 19.0
 
Sept. 22, 2021, 4 a.m. 7.1 ppb (7) 0.4 ppb (1) 6.2 ppb (6) 8.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (19) 0.23 ppb (3) 11.0 μg/m3 (11) 7.9 μg/m3 (33) 33.0
 
Sept. 22, 2021, 3 a.m. 6.8 ppb (7) 0.4 ppb (1) 6.1 ppb (6) 7.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (20) 0.23 ppb (3) 12.0 μg/m3 (12) 4.1 μg/m3 (18) 20.0
 
Sept. 22, 2021, 2 a.m. 5.0 ppb (5) 0.4 ppb (1) 4.6 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (21) 0.23 ppb (3) 14.0 μg/m3 (13) 4.4 μg/m3 (19) 21.0
 
Sept. 22, 2021, 1 a.m. 6.4 ppb (7) 0.4 ppb (1) 5.7 ppb (6) 7.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (20) 0.24 ppb (3) 14.0 μg/m3 (13) 1.7 μg/m3 (8) 20.0
 
Sept. 22, 2021, midnight 4.8 ppb (5) 0.5 ppb (1) 4.3 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (22) 0.22 ppb (3) 12.0 μg/m3 (12) 6.5 μg/m3 (28) 28.0
 
Sept. 21, 2021, 11 p.m. 4.4 ppb (5) 0.4 ppb (1) 4.1 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.22 ppb (3) 12.0 μg/m3 (12) 1.7 μg/m3 (8) 24.0
 
Sept. 21, 2021, 10 p.m. 4.1 ppb (4) 0.6 ppb (1) 3.5 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (20) 0.23 ppb (3) 12.0 μg/m3 (12) 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A 12.0 μg/m3 (12) 1.3 μg/m3 (6) 21.0
 
Sept. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) N/A 16.0 μg/m3 (15) 8.0 μg/m3 (34) 34.0
 
Sept. 21, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) N/A 26.0 μg/m3 (25) 13.4 μg/m3 (54) 54.0
 
Sept. 21, 2021, 6 p.m. 5.1 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.26 ppb (4) 19.0 μg/m3 (18) 8.4 μg/m3 (36) 36.0
 
Sept. 21, 2021, 5 p.m. 5.7 ppb (6) 1.6 ppb (2) 6.4 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 17.0 ppb (16) 0.2 ppb (3) 17.0 μg/m3 (16) 5.2 μg/m3 (22) 22.0
 
Sept. 21, 2021, 4 p.m. 6.3 ppb (6) 1.3 ppb (2) 6.7 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 15.0 ppb (14) 0.19 ppb (3) 18.0 μg/m3 (17) 4.1 μg/m3 (18) 18.0
 
Sept. 21, 2021, 3 p.m. 7.3 ppb (7) 1.5 ppb (2) 6.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 12.0 ppb (12) 0.34 ppb (4) 16.0 μg/m3 (15) 9.2 μg/m3 (39) 39.0
 
Sept. 21, 2021, 2 p.m. 5.4 ppb (6) 0.6 ppb (1) 5.9 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 12.0 ppb (12) 0.19 ppb (3) 22.0 μg/m3 (21) 5.4 μg/m3 (23) 23.0
 
Sept. 21, 2021, 1 p.m. 5.6 ppb (6) 0.3 ppb (1) 5.9 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (13) 0.19 ppb (3) 16.0 μg/m3 (15) 16.0 μg/m3 (60) 60.0
 
Sept. 21, 2021, noon 7.1 ppb (7) 0.4 ppb (1) 7.5 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 23.0 ppb (22) 0.19 ppb (3) 8.0 μg/m3 (8) 5.5 μg/m3 (23) 23.0
 
Sept. 21, 2021, 11 a.m. 4.3 ppb (5) 0.3 ppb (1) 5.1 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) 8.0 μg/m3 (8) 3.1 μg/m3 (13) 31.0
 
Sept. 21, 2021, 10 a.m. 13.7 ppb (13) 0.3 ppb (1) 13.6 ppb (13) 14.0 ppb (14) N/A 0.0 ppb (0) 26.0 ppb (25) 0.17 ppb (3) 10.0 μg/m3 (10) 6.2 μg/m3 (26) 26.0
 
Sept. 21, 2021, 9 a.m. 4.6 ppb (5) 0.3 ppb (1) 5.7 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) 9.0 μg/m3 (9) 5.5 μg/m3 (23) 34.0
 
Sept. 21, 2021, 8 a.m. 5.7 ppb (6) 0.3 ppb (1) 6.1 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) 13.0 μg/m3 (13) 6.2 μg/m3 (26) 32.0
 
Sept. 21, 2021, 7 a.m. 4.7 ppb (5) 0.3 ppb (1) 5.2 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (2) 16.0 ppb (15) 0.17 ppb (3) 15.0 μg/m3 (14) 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2021, 6 a.m. 6.7 ppb (7) 0.3 ppb (1) 7.1 ppb (7) 7.0 ppb (7) N/A 1.0 ppb (2) 11.0 ppb (11) 0.15 ppb (2) 14.0 μg/m3 (13) 7.4 μg/m3 (31) 31.0
 
Sept. 21, 2021, 5 a.m. 6.3 ppb (6) 0.3 ppb (1) 6.7 ppb (7) 7.0 ppb (7) N/A 1.0 ppb (2) 13.0 ppb (13) 0.17 ppb (3) 13.0 μg/m3 (13) 10.8 μg/m3 (46) 46.0
 
Sept. 21, 2021, 4 a.m. 6.4 ppb (7) 0.5 ppb (1) 6.5 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (13) 0.17 ppb (3) 14.0 μg/m3 (13) 7.2 μg/m3 (31) 31.0
 
Sept. 21, 2021, 3 a.m. 7.7 ppb (8) 0.4 ppb (1) 8.1 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 16.0 ppb (15) 0.17 ppb (3) 15.0 μg/m3 (14) 4.3 μg/m3 (18) 18.0
 
Sept. 21, 2021, 2 a.m. 9.1 ppb (9) 0.3 ppb (1) 9.3 ppb (9) 10.0 ppb (10) N/A 0.0 ppb (0) 18.0 ppb (17) 0.17 ppb (3) 18.0 μg/m3 (17) 9.3 μg/m3 (39) 39.0
 
Sept. 21, 2021, 1 a.m. 3.4 ppb (4) 0.3 ppb (1) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (25) 0.17 ppb (3) 17.0 μg/m3 (16) 11.2 μg/m3 (47) 47.0
 
Sept. 21, 2021, midnight 4.4 ppb (5) 0.3 ppb (1) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (23) 0.16 ppb (3) 13.0 μg/m3 (13) 1.2 μg/m3 (5) 23.0
 
Sept. 20, 2021, 11 p.m. 4.5 ppb (5) 0.4 ppb (1) 5.3 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (2) 28.0 ppb (26) 0.17 ppb (3) 14.0 μg/m3 (13) 3.7 μg/m3 (16) 26.0
 
Sept. 20, 2021, 10 p.m. 3.6 ppb (4) 0.4 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 2.0 ppb (3) 32.0 ppb (30) 0.17 ppb (3) 15.0 μg/m3 (14) 7.2 μg/m3 (31) 31.0
 
Sept. 20, 2021, 9 p.m. 3.5 ppb (4) 0.5 ppb (1) 4.9 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (2) 29.0 ppb (27) 0.17 ppb (3) 16.0 μg/m3 (15) 3.5 μg/m3 (15) 27.0
 
Sept. 20, 2021, 8 p.m. 4.5 ppb (5) 0.9 ppb (1) 5.6 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (2) 31.0 ppb (29) 0.18 ppb (3) 19.0 μg/m3 (18) 5.9 μg/m3 (25) 29.0
 
Sept. 20, 2021, 7 p.m. 4.2 ppb (4) 0.7 ppb (1) 5.6 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (2) 31.0 ppb (29) 0.18 ppb (3) 22.0 μg/m3 (21) 8.0 μg/m3 (34) 34.0
 
Sept. 20, 2021, 6 p.m. 3.5 ppb (4) 0.7 ppb (1) 5.2 ppb (5) 3.0 ppb (3) N/A 2.0 ppb (3) 30.0 ppb (28) 0.16 ppb (3) 20.0 μg/m3 (19) 7.5 μg/m3 (32) 32.0
 
Sept. 20, 2021, 5 p.m. 3.6 ppb (4) 0.7 ppb (1) 4.8 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (2) 28.0 ppb (26) 0.17 ppb (3) 20.0 μg/m3 (19) 4.3 μg/m3 (18) 26.0
 
Sept. 20, 2021, 4 p.m. 3.9 ppb (4) 0.8 ppb (1) 5.5 ppb (6) 3.0 ppb (3) N/A 1.0 ppb (2) 24.0 ppb (23) 0.17 ppb (3) 16.0 μg/m3 (15) 5.3 μg/m3 (23) 23.0
 
Sept. 20, 2021, 3 p.m. 4.2 ppb (4) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (2) 18.0 ppb (17) 0.18 ppb (3) 14.0 μg/m3 (13) 3.5 μg/m3 (15) 17.0
 
Sept. 20, 2021, 2 p.m. 5.7 ppb (6) 1.5 ppb (2) 6.5 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (2) 14.0 ppb (13) 0.18 ppb (3) 14.0 μg/m3 (13) 6.3 μg/m3 (27) 27.0
 
Sept. 20, 2021, 1 p.m. 12.0 ppb (12) 4.3 ppb (5) 13.0 ppb (13) 8.0 ppb (8) N/A 1.0 ppb (2) 8.0 ppb (8) 0.19 ppb (3) 14.0 μg/m3 (13) 6.4 μg/m3 (27) 27.0
 
Sept. 20, 2021, noon 9.4 ppb (9) 1.3 ppb (2) 9.8 ppb (10) 8.0 ppb (8) N/A 1.0 ppb (2) 7.0 ppb (7) 0.19 ppb (3) 14.0 μg/m3 (13) 5.9 μg/m3 (25) 25.0
 
Sept. 20, 2021, 11 a.m. 6.0 ppb (6) 0.3 ppb (1) 6.2 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (2) 9.0 ppb (9) 0.18 ppb (3) 13.0 μg/m3 (13) 4.7 μg/m3 (20) 20.0
 
Sept. 20, 2021, 10 a.m. 6.1 ppb (6) 0.4 ppb (1) 6.3 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (9) 0.18 ppb (3) 13.0 μg/m3 (13) 4.3 μg/m3 (18) 18.0
 
Sept. 20, 2021, 9 a.m. 5.4 ppb (6) 0.3 ppb (1) 5.6 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (9) 0.17 ppb (3) 12.0 μg/m3 (12) 3.3 μg/m3 (14) 14.0
 
Sept. 20, 2021, 8 a.m. 4.9 ppb (5) 0.3 ppb (1) 5.2 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 10.0 ppb (10) 0.17 ppb (3) 12.0 μg/m3 (12) 5.4 μg/m3 (23) 23.0
 
Sept. 20, 2021, 7 a.m. 5.9 ppb (6) 0.3 ppb (1) 6.1 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 11.0 ppb (11) 0.17 ppb (3) 12.0 μg/m3 (12) 5.6 μg/m3 (24) 24.0
 
Sept. 20, 2021, 6 a.m. 5.6 ppb (6) 0.3 ppb (1) 5.8 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 10.0 ppb (10) 0.17 ppb (3) 13.0 μg/m3 (13) 2.4 μg/m3 (10) 13.0
 
Sept. 20, 2021, 5 a.m. 7.1 ppb (7) 0.5 ppb (1) 6.2 ppb (6) 7.0 ppb (7) N/A 0.0 ppb (0) 11.0 ppb (11) 0.19 ppb (3) 11.0 μg/m3 (11) 4.4 μg/m3 (19) 19.0
 
Sept. 20, 2021, 4 a.m. 3.9 ppb (4) 0.3 ppb (1) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (13) 0.2 ppb (3) 10.0 μg/m3 (10) 3.9 μg/m3 (17) 17.0
 
Sept. 20, 2021, 3 a.m. 5.2 ppb (5) 0.4 ppb (1) 5.7 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 13.0 ppb (13) 0.21 ppb (3) 11.0 μg/m3 (11) 3.4 μg/m3 (15) 15.0
 
Sept. 20, 2021, 2 a.m. 11.0 ppb (11) 1.8 ppb (2) 10.8 ppb (11) 9.0 ppb (9) N/A 0.0 ppb (0) 8.0 ppb (8) 0.25 ppb (3) 11.0 μg/m3 (11) 4.7 μg/m3 (20) 20.0
 
Sept. 20, 2021, 1 a.m. 9.8 ppb (10) 1.5 ppb (2) 9.3 ppb (9) 9.0 ppb (9) N/A 0.0 ppb (0) 10.0 ppb (10) 0.24 ppb (3) 11.0 μg/m3 (11) 3.8 μg/m3 (16) 16.0
 
Sept. 20, 2021, midnight 7.0 ppb (7) 0.6 ppb (1) 7.4 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (13) 0.22 ppb (3) 10.0 μg/m3 (10) 1.6 μg/m3 (7) 13.0
 
Sept. 19, 2021, 11 p.m. 3.4 ppb (4) 0.4 ppb (1) 3.6 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (19) 0.17 ppb (3) 8.0 μg/m3 (8) 2.9 μg/m3 (13) 19.0
 
Sept. 19, 2021, 10 p.m. 2.5 ppb (3) 0.3 ppb (1) 3.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.17 ppb (3) 10.0 μg/m3 (10) 0.7 μg/m3 (3) 24.0
 
Sept. 19, 2021, 9 p.m. 3.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.19 ppb (3) 15.0 μg/m3 (14) -2.0 μg/m3 (0) 27.0
 
Sept. 19, 2021, 8 p.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) 12.0 μg/m3 (12) 9.3 μg/m3 (39) 39.0
 
Sept. 19, 2021, 7 p.m. 7.3 ppb (7) 2.4 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (25) 0.2 ppb (3) 16.0 μg/m3 (15) 5.4 μg/m3 (23) 25.0
 
Sept. 19, 2021, 6 p.m. 3.6 ppb (4) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.17 ppb (3) 15.0 μg/m3 (14) 2.5 μg/m3 (11) 27.0
 
Sept. 19, 2021, 5 p.m. 3.5 ppb (4) 0.9 ppb (1) 4.9 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 28.0
 
Sept. 19, 2021, 4 p.m. 3.1 ppb (3) 0.7 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) 9.0 μg/m3 (9) 2.8 μg/m3 (12) 28.0
 
Sept. 19, 2021, 3 p.m. 8.0 ppb (8) 2.7 ppb (3) 9.9 ppb (10) 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.22 ppb (3) 13.0 μg/m3 (13) 6.8 μg/m3 (29) 29.0
 
Sept. 19, 2021, 2 p.m. 15.0 ppb (15) 6.0 ppb (6) 16.9 ppb (16) 9.0 ppb (9) N/A N/A 11.0 ppb (11) 0.27 ppb (4) 15.0 μg/m3 (14) 7.6 μg/m3 (32) 32.0
 
Sept. 19, 2021, 1 p.m. 20.3 ppb (20) 7.8 ppb (8) 22.1 ppb (21) 13.0 ppb (13) N/A 0.0 ppb (0) 6.0 ppb (6) 0.29 ppb (4) 17.0 μg/m3 (16) 7.6 μg/m3 (32) 32.0
 
Sept. 19, 2021, noon 27.5 ppb (26) 11.3 ppb (11) 28.5 ppb (27) 16.0 ppb (16) N/A 0.0 ppb (0) 2.0 ppb (2) 0.28 ppb (4) 22.0 μg/m3 (21) 8.1 μg/m3 (34) 34.0
 
Sept. 19, 2021, 11 a.m. 26.8 ppb (26) 8.6 ppb (9) 27.5 ppb (26) 18.0 ppb (17) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 18.0 μg/m3 (17) 6.3 μg/m3 (27) 27.0
 
Sept. 19, 2021, 10 a.m. 38.7 ppb (37) 16.8 ppb (16) 42.4 ppb (40) 22.0 ppb (21) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 15.0 μg/m3 (14) 12.0 μg/m3 (50) 50.0
 
Sept. 19, 2021, 9 a.m. 16.5 ppb (16) 3.2 ppb (4) 19.0 ppb (18) 14.0 ppb (14) N/A 0.0 ppb (0) 7.0 ppb (7) 0.24 ppb (3) 13.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 8 a.m. 11.8 ppb (12) 0.4 ppb (1) 12.4 ppb (12) 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.22 ppb (3) 11.0 μg/m3 (11) 8.9 μg/m3 (38) 38.0
 
Sept. 19, 2021, 7 a.m. 9.5 ppb (9) 0.6 ppb (1) 9.7 ppb (10) 10.0 ppb (10) N/A 1.0 ppb (2) 15.0 ppb (14) 0.2 ppb (3) 12.0 μg/m3 (12) 4.4 μg/m3 (19) 19.0
 
Sept. 19, 2021, 6 a.m. 7.2 ppb (7) 0.3 ppb (1) 8.0 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 21.0 ppb (20) 0.19 ppb (3) 12.0 μg/m3 (12) 3.6 μg/m3 (16) 20.0
 
Sept. 19, 2021, 5 a.m. 25.9 ppb (25) 4.1 ppb (4) 24.5 ppb (24) 22.0 ppb (21) N/A 0.0 ppb (0) 11.0 ppb (11) 0.51 ppb (6) 19.0 μg/m3 (18) 12.6 μg/m3 (53) 53.0
 
Sept. 19, 2021, 4 a.m. 41.2 ppb (39) 10.2 ppb (10) 43.7 ppb (42) 31.0 ppb (30) N/A 0.0 ppb (0) 1.0 ppb (1) 0.66 ppb (8) 26.0 μg/m3 (25) 17.1 μg/m3 (62) 62.0
 
Sept. 19, 2021, 3 a.m. 23.0 ppb (22) 1.4 ppb (2) 24.0 ppb (23) 22.0 ppb (21) N/A 0.0 ppb (0) 11.0 ppb (11) 0.51 ppb (6) 21.0 μg/m3 (20) 14.3 μg/m3 (56) 56.0
 
Sept. 19, 2021, 2 a.m. 25.3 ppb (24) 0.7 ppb (1) 24.5 ppb (24) 25.0 ppb (24) N/A 0.0 ppb (0) 10.0 ppb (10) 0.49 ppb (6) 17.0 μg/m3 (16) 13.2 μg/m3 (54) 54.0
 
Sept. 19, 2021, 1 a.m. 27.9 ppb (27) 1.4 ppb (2) 27.2 ppb (26) 27.0 ppb (26) N/A 0.0 ppb (0) 10.0 ppb (10) 0.46 ppb (6) 18.0 μg/m3 (17) 9.3 μg/m3 (39) 39.0
 
Sept. 19, 2021, midnight 22.1 ppb (21) 0.9 ppb (1) 23.0 ppb (22) 22.0 ppb (21) N/A 0.0 ppb (0) 17.0 ppb (16) 0.41 ppb (5) 14.0 μg/m3 (13) 7.6 μg/m3 (32) 32.0
 
Sept. 18, 2021, 11 p.m. 10.5 ppb (10) 0.5 ppb (1) 12.2 ppb (12) 10.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (28) 0.28 ppb (4) 14.0 μg/m3 (13) 3.1 μg/m3 (13) 28.0
 
Sept. 18, 2021, 10 p.m. 5.2 ppb (5) 0.5 ppb (1) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (35) 0.22 ppb (3) 12.0 μg/m3 (12) 4.4 μg/m3 (19) 35.0
 
Sept. 18, 2021, 9 p.m. 3.8 ppb (4) 0.5 ppb (1) 5.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) 13.0 μg/m3 (13) 5.3 μg/m3 (23) 38.0
 
Sept. 18, 2021, 8 p.m. 2.7 ppb (3) 0.5 ppb (1) 4.8 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) 13.0 μg/m3 (13) 4.2 μg/m3 (18) 38.0
 
Sept. 18, 2021, 7 p.m. 3.2 ppb (4) 0.5 ppb (1) 5.2 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) 0.2 ppb (3) 16.0 μg/m3 (15) 3.6 μg/m3 (16) 37.0
 
Sept. 18, 2021, 6 p.m. 3.3 ppb (4) 0.4 ppb (1) 5.4 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) 15.0 μg/m3 (14) 1.1 μg/m3 (5) 34.0
 
Sept. 18, 2021, 5 p.m. 1.5 ppb (2) 0.3 ppb (1) 3.9 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) 15.0 μg/m3 (14) 7.8 μg/m3 (33) 34.0
 
Sept. 18, 2021, 4 p.m. 2.0 ppb (2) 0.4 ppb (1) 4.4 ppb (5) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.22 ppb (3) 13.0 μg/m3 (13) -1.5 μg/m3 (0) 34.0
 
Sept. 18, 2021, 3 p.m. 6.9 ppb (7) 1.9 ppb (2) 9.5 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (25) 0.28 ppb (4) 16.0 μg/m3 (15) 6.2 μg/m3 (26) 26.0
 
Sept. 18, 2021, 2 p.m. 16.7 ppb (16) 6.3 ppb (6) 19.5 ppb (19) 11.0 ppb (11) N/A 0.0 ppb (0) 17.0 ppb (16) 0.25 ppb (3) 19.0 μg/m3 (18) 7.9 μg/m3 (33) 33.0
 
Sept. 18, 2021, 1 p.m. 20.6 ppb (20) 7.9 ppb (8) 23.2 ppb (22) 13.0 ppb (13) N/A 1.0 ppb (2) 10.0 ppb (10) 0.3 ppb (4) 21.0 μg/m3 (20) 10.8 μg/m3 (46) 46.0
 
Sept. 18, 2021, noon 29.2 ppb (28) 13.2 ppb (13) 30.4 ppb (29) 16.0 ppb (16) N/A 0.0 ppb (0) 3.0 ppb (3) 0.32 ppb (4) 30.0 μg/m3 (28) 12.0 μg/m3 (50) 50.0
 
Sept. 18, 2021, 11 a.m. 36.1 ppb (35) 16.3 ppb (16) 38.5 ppb (37) 20.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) 0.36 ppb (5) 26.0 μg/m3 (25) 17.1 μg/m3 (62) 62.0
 
Sept. 18, 2021, 10 a.m. 36.1 ppb (35) 15.5 ppb (15) 40.4 ppb (39) 21.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) 0.43 ppb (5) 18.0 μg/m3 (17) 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 9 a.m. 36.1 ppb (35) 12.9 ppb (13) 38.1 ppb (36) 23.0 ppb (22) N/A 0.0 ppb (0) 0.0 ppb (0) 0.39 ppb (5) 21.0 μg/m3 (20) 14.0 μg/m3 (55) 55.0
 
Sept. 18, 2021, 8 a.m. 35.0 ppb (34) 10.5 ppb (10) 37.3 ppb (36) 25.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.48 ppb (6) 20.0 μg/m3 (19) 13.9 μg/m3 (55) 55.0
 
Sept. 18, 2021, 7 a.m. 18.0 ppb (17) 1.2 ppb (2) 19.3 ppb (19) 17.0 ppb (17) N/A 1.0 ppb (2) 7.0 ppb (7) 0.39 ppb (5) 15.0 μg/m3 (14) 7.8 μg/m3 (33) 33.0
 
Sept. 18, 2021, 6 a.m. 19.7 ppb (19) 0.4 ppb (1) 20.2 ppb (20) 20.0 ppb (19) N/A 1.0 ppb (2) 10.0 ppb (10) 0.29 ppb (4) 15.0 μg/m3 (14) 10.5 μg/m3 (44) 44.0
 
Sept. 18, 2021, 5 a.m. 30.7 ppb (29) 3.1 ppb (3) 31.6 ppb (30) 28.0 ppb (27) N/A 1.0 ppb (2) 3.0 ppb (3) 0.42 ppb (5) 19.0 μg/m3 (18) 9.7 μg/m3 (41) 41.0
 
Sept. 18, 2021, 4 a.m. 21.0 ppb (20) 1.0 ppb (1) 22.0 ppb (21) 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (8) 0.4 ppb (5) 14.0 μg/m3 (13) 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 3 a.m. 9.7 ppb (10) 0.4 ppb (1) 9.8 ppb (10) 10.0 ppb (10) N/A 0.0 ppb (0) 20.0 ppb (19) 0.26 ppb (4) 13.0 μg/m3 (13) 6.1 μg/m3 (26) 26.0
 
Sept. 18, 2021, 2 a.m. 6.4 ppb (7) 0.3 ppb (1) 6.9 ppb (7) 7.0 ppb (7) N/A 1.0 ppb (2) 25.0 ppb (24) 0.21 ppb (3) 13.0 μg/m3 (13) 8.1 μg/m3 (34) 34.0
 
Sept. 18, 2021, 1 a.m. 7.3 ppb (7) 0.4 ppb (1) 7.4 ppb (7) 8.0 ppb (8) N/A 1.0 ppb (2) 26.0 ppb (25) 0.2 ppb (3) 13.0 μg/m3 (13) 5.4 μg/m3 (23) 25.0
 
Sept. 18, 2021, midnight 9.6 ppb (10) 0.5 ppb (1) 10.8 ppb (11) 10.0 ppb (10) N/A 1.0 ppb (2) 28.0 ppb (26) 0.22 ppb (3) 24.0 μg/m3 (23) 7.5 μg/m3 (32) 32.0
 
Sept. 17, 2021, 11 p.m. 10.6 ppb (10) 0.4 ppb (1) 12.1 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 32.0 ppb (30) 0.28 ppb (4) 19.0 μg/m3 (18) 7.6 μg/m3 (32) 32.0
 
Sept. 17, 2021, 10 p.m. 8.2 ppb (8) 0.9 ppb (1) 9.7 ppb (10) 8.0 ppb (8) N/A 1.0 ppb (2) 40.0 ppb (38) 0.23 ppb (3) 17.0 μg/m3 (16) 14.6 μg/m3 (57) 57.0
 
Sept. 17, 2021, 9 p.m. 3.0 ppb (3) 0.4 ppb (1) 5.7 ppb (6) 3.0 ppb (3) N/A 1.0 ppb (2) 55.0 ppb (51) 0.21 ppb (3) 19.0 μg/m3 (18) 6.7 μg/m3 (28) 51.0
 
Sept. 17, 2021, 8 p.m. 3.1 ppb (3) 0.4 ppb (1) 6.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (3) 53.0 ppb (50) 0.27 ppb (4) 21.0 μg/m3 (20) 13.9 μg/m3 (55) 55.0
 
Sept. 17, 2021, 7 p.m. 3.7 ppb (4) 0.6 ppb (1) 6.7 ppb (7) 3.0 ppb (3) N/A 2.0 ppb (3) 50.0 ppb (47) 0.23 ppb (3) 17.0 μg/m3 (16) 6.0 μg/m3 (25) 47.0
 
Sept. 17, 2021, 6 p.m. 3.3 ppb (4) 0.4 ppb (1) 6.2 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (3) 49.0 ppb (46) 0.21 ppb (3) 20.0 μg/m3 (19) 0.0 μg/m3 (0) 46.0
 
Sept. 17, 2021, 5 p.m. 6.9 ppb (7) 1.4 ppb (2) 9.4 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (2) 43.0 ppb (40) 0.22 ppb (3) 19.0 μg/m3 (18) 0.0 μg/m3 (0) 40.0
 
Sept. 17, 2021, 4 p.m. 24.2 ppb (23) 6.9 ppb (7) 29.9 ppb (29) 18.0 ppb (17) N/A 2.0 ppb (3) 34.0 ppb (32) 0.31 ppb (4) N/A N/A 32.0
 
Sept. 17, 2021, 3 p.m. 33.1 ppb (32) 12.4 ppb (12) 38.2 ppb (37) 21.0 ppb (20) N/A 2.0 ppb (3) 24.0 ppb (23) 0.33 ppb (4) 50.0 μg/m3 (47) 18.4 μg/m3 (65) 65.0
 
Sept. 17, 2021, 2 p.m. 60.5 ppb (58) 29.5 ppb (28) 68.1 ppb (67) 31.0 ppb (30) N/A 2.0 ppb (3) 10.0 ppb (10) 0.47 ppb (6) 75.0 μg/m3 (61) 30.2 μg/m3 (90) 90.0
 
Sept. 17, 2021, 1 p.m. 56.6 ppb (54) 28.4 ppb (27) 61.5 ppb (59) 28.0 ppb (27) N/A 1.0 ppb (2) 8.0 ppb (8) 0.47 ppb (6) 58.0 μg/m3 (53) 35.2 μg/m3 (100) 100.0
 
Sept. 17, 2021, noon 66.5 ppb (65) 39.1 ppb (37) 71.1 ppb (70) 28.0 ppb (27) N/A 1.0 ppb (2) 17.0 ppb (16) 0.44 ppb (5) 65.0 μg/m3 (56) 20.2 μg/m3 (69) 70.0
 
Sept. 17, 2021, 11 a.m. 61.5 ppb (59) 34.9 ppb (33) 67.7 ppb (66) 27.0 ppb (26) N/A 0.0 ppb (0) 0.0 ppb (0) 0.68 ppb (8) 28.0 μg/m3 (26) 11.4 μg/m3 (48) 66.0
 
Sept. 17, 2021, 10 a.m. 54.6 ppb (52) 26.6 ppb (26) 57.7 ppb (55) 28.0 ppb (27) N/A 0.0 ppb (0) 0.0 ppb (0) 0.44 ppb (5) 21.0 μg/m3 (20) 11.4 μg/m3 (48) 55.0
 
Sept. 17, 2021, 9 a.m. 45.9 ppb (44) 15.0 ppb (15) 48.7 ppb (46) 31.0 ppb (30) N/A 0.0 ppb (0) 0.0 ppb (0) 0.31 ppb (4) 18.0 μg/m3 (17) 10.6 μg/m3 (45) 46.0
 
Sept. 17, 2021, 8 a.m. 36.6 ppb (35) 5.1 ppb (5) 38.0 ppb (36) 32.0 ppb (31) N/A 0.0 ppb (0) 0.0 ppb (0) 0.34 ppb (4) 22.0 μg/m3 (21) 12.4 μg/m3 (52) 52.0
 
Sept. 17, 2021, 7 a.m. 16.6 ppb (16) 0.9 ppb (1) 16.5 ppb (16) 16.0 ppb (16) N/A 0.0 ppb (0) 15.0 ppb (14) 0.31 ppb (4) 16.0 μg/m3 (15) 10.8 μg/m3 (46) 46.0
 
Sept. 17, 2021, 6 a.m. 9.5 ppb (9) 0.4 ppb (1) 9.7 ppb (10) 10.0 ppb (10) N/A 1.0 ppb (2) 29.0 ppb (27) 0.24 ppb (3) 19.0 μg/m3 (18) 9.1 μg/m3 (38) 38.0
 
Sept. 17, 2021, 5 a.m. 19.4 ppb (19) 0.3 ppb (1) 19.4 ppb (19) 20.0 ppb (19) N/A 1.0 ppb (2) 26.0 ppb (25) 0.32 ppb (4) 20.0 μg/m3 (19) 7.5 μg/m3 (32) 32.0
 
Sept. 17, 2021, 4 a.m. 28.8 ppb (28) 1.0 ppb (1) 27.9 ppb (27) 28.0 ppb (27) N/A 1.0 ppb (2) 20.0 ppb (19) 0.36 ppb (5) 19.0 μg/m3 (18) 12.7 μg/m3 (53) 53.0
 
Sept. 17, 2021, 3 a.m. 32.3 ppb (31) 0.7 ppb (1) 32.0 ppb (31) 32.0 ppb (31) N/A 0.0 ppb (0) 16.0 ppb (15) 0.36 ppb (5) 20.0 μg/m3 (19) 11.1 μg/m3 (47) 47.0
 
Sept. 17, 2021, 2 a.m. 36.7 ppb (35) 1.0 ppb (1) 35.6 ppb (34) 36.0 ppb (34) N/A 0.0 ppb (0) 10.0 ppb (10) 0.44 ppb (5) 20.0 μg/m3 (19) 9.5 μg/m3 (40) 40.0
 
Sept. 17, 2021, 1 a.m. 25.6 ppb (25) 0.4 ppb (1) 25.8 ppb (25) 26.0 ppb (25) N/A 0.0 ppb (0) 20.0 ppb (19) 0.42 ppb (5) 20.0 μg/m3 (19) 8.2 μg/m3 (35) 35.0
 
Sept. 17, 2021, midnight 21.4 ppb (21) 0.4 ppb (1) 22.0 ppb (21) 22.0 ppb (21) N/A 0.0 ppb (0) 27.0 ppb (25) 0.35 ppb (4) 21.0 μg/m3 (20) 4.5 μg/m3 (19) 25.0
 
Sept. 16, 2021, 11 p.m. 7.1 ppb (7) 0.4 ppb (1) 7.9 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 45.0 ppb (42) 0.23 ppb (3) 13.0 μg/m3 (13) 8.6 μg/m3 (36) 42.0
 
Sept. 16, 2021, 10 p.m. 6.1 ppb (6) 0.6 ppb (1) 6.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 49.0 ppb (46) 0.23 ppb (3) 14.0 μg/m3 (13) 5.5 μg/m3 (23) 46.0
 
Sept. 16, 2021, 9 p.m. 6.2 ppb (6) 0.9 ppb (1) 7.9 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 50.0 ppb (47) 0.22 ppb (3) 15.0 μg/m3 (14) 4.8 μg/m3 (20) 47.0
 
Sept. 16, 2021, 8 p.m. 6.6 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (48) 0.23 ppb (3) 15.0 μg/m3 (14) 8.1 μg/m3 (34) 48.0
 
Sept. 16, 2021, 7 p.m. 5.7 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 52.0 ppb (49) 0.22 ppb (3) 21.0 μg/m3 (20) 5.1 μg/m3 (22) 49.0
 
Sept. 16, 2021, 6 p.m. 5.4 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (48) 0.22 ppb (3) 25.0 μg/m3 (24) 3.2 μg/m3 (14) 48.0
 
Sept. 16, 2021, 5 p.m. 6.3 ppb (6) 1.4 ppb (2) 9.4 ppb (9) 5.0 ppb (5) N/A 1.0 ppb (2) 46.0 ppb (43) 0.2 ppb (3) 25.0 μg/m3 (24) 7.6 μg/m3 (32) 43.0
 
Sept. 16, 2021, 4 p.m. 8.2 ppb (8) 2.5 ppb (3) 10.8 ppb (11) 6.0 ppb (6) N/A 1.0 ppb (2) 39.0 ppb (37) 0.23 ppb (3) 26.0 μg/m3 (25) 9.3 μg/m3 (39) 39.0
 
Sept. 16, 2021, 3 p.m. 12.9 ppb (13) 4.7 ppb (5) 15.1 ppb (15) 9.0 ppb (9) N/A 1.0 ppb (2) 29.0 ppb (27) 0.24 ppb (3) 29.0 μg/m3 (27) 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 2 p.m. 20.9 ppb (20) 8.5 ppb (9) 23.1 ppb (22) 13.0 ppb (13) N/A 1.0 ppb (2) 19.0 ppb (18) 0.28 ppb (4) 37.0 μg/m3 (35) 9.1 μg/m3 (38) 38.0
 
Sept. 16, 2021, 1 p.m. 37.5 ppb (36) 18.3 ppb (18) 39.7 ppb (38) 20.0 ppb (19) N/A 1.0 ppb (2) 10.0 ppb (10) 0.36 ppb (5) 45.0 μg/m3 (42) 15.9 μg/m3 (59) 59.0
 
Sept. 16, 2021, noon 32.9 ppb (32) 12.7 ppb (12) 34.6 ppb (33) 21.0 ppb (20) N/A 1.0 ppb (2) 7.0 ppb (7) 0.33 ppb (4) 25.0 μg/m3 (24) 7.5 μg/m3 (32) 33.0
 
Sept. 16, 2021, 11 a.m. 41.6 ppb (40) 16.3 ppb (16) 42.1 ppb (40) 26.0 ppb (25) N/A 0.0 ppb (0) 1.0 ppb (1) 0.5 ppb (6) 22.0 μg/m3 (21) 7.4 μg/m3 (31) 40.0
 
Sept. 16, 2021, 10 a.m. 35.7 ppb (34) 10.4 ppb (10) 37.7 ppb (36) 25.0 ppb (24) N/A 0.0 ppb (0) 1.0 ppb (1) 0.3 ppb (4) 15.0 μg/m3 (14) 9.8 μg/m3 (41) 41.0
 
Sept. 16, 2021, 9 a.m. 21.4 ppb (21) 0.9 ppb (1) 22.3 ppb (22) 21.0 ppb (20) N/A 0.0 ppb (0) 5.0 ppb (5) 0.26 ppb (4) 14.0 μg/m3 (13) 6.4 μg/m3 (27) 27.0
 
Sept. 16, 2021, 8 a.m. 25.5 ppb (25) 2.4 ppb (3) 24.8 ppb (24) 23.0 ppb (22) N/A 0.0 ppb (0) 4.0 ppb (4) 0.27 ppb (4) 15.0 μg/m3 (14) 6.8 μg/m3 (29) 29.0
 
Sept. 16, 2021, 7 a.m. 38.8 ppb (37) 13.0 ppb (13) 38.9 ppb (37) 26.0 ppb (25) N/A 0.0 ppb (0) 1.0 ppb (1) 0.39 ppb (5) 17.0 μg/m3 (16) 10.5 μg/m3 (44) 44.0
 
Sept. 16, 2021, 6 a.m. 45.7 ppb (44) 21.3 ppb (21) 46.7 ppb (45) 25.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.53 ppb (6) 21.0 μg/m3 (20) 12.1 μg/m3 (51) 51.0
 
Sept. 16, 2021, 5 a.m. 40.0 ppb (38) 15.0 ppb (15) 42.1 ppb (40) 25.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.62 ppb (7) 22.0 μg/m3 (21) 11.1 μg/m3 (47) 47.0
 
Sept. 16, 2021, 4 a.m. 41.6 ppb (40) 11.3 ppb (11) 42.5 ppb (41) 31.0 ppb (30) N/A 0.0 ppb (0) 0.0 ppb (0) 0.53 ppb (6) 23.0 μg/m3 (22) 11.7 μg/m3 (49) 49.0
 
Sept. 16, 2021, 3 a.m. 33.7 ppb (32) 3.3 ppb (4) 34.4 ppb (33) 31.0 ppb (30) N/A 0.0 ppb (0) 5.0 ppb (5) 0.47 ppb (6) 17.0 μg/m3 (16) 9.2 μg/m3 (39) 39.0
 
Sept. 16, 2021, 2 a.m. 38.1 ppb (36) 2.5 ppb (3) 37.2 ppb (36) 36.0 ppb (34) N/A 0.0 ppb (0) 4.0 ppb (4) 0.42 ppb (5) 19.0 μg/m3 (18) 6.0 μg/m3 (25) 36.0
 
Sept. 16, 2021, 1 a.m. 36.4 ppb (35) 2.3 ppb (3) 37.8 ppb (36) 34.0 ppb (33) N/A 0.0 ppb (0) 6.0 ppb (6) 0.42 ppb (5) 17.0 μg/m3 (16) 7.5 μg/m3 (32) 36.0
 
Sept. 16, 2021, midnight 19.3 ppb (19) 0.6 ppb (1) 19.6 ppb (19) 19.0 ppb (18) N/A 0.0 ppb (0) 24.0 ppb (23) 0.31 ppb (4) 16.0 μg/m3 (15) 5.3 μg/m3 (23) 23.0
 
Sept. 15, 2021, 11 p.m. 13.8 ppb (14) 1.1 ppb (2) 14.6 ppb (14) 13.0 ppb (13) N/A 0.0 ppb (0) 35.0 ppb (33) 0.28 ppb (4) 16.0 μg/m3 (15) 6.4 μg/m3 (27) 33.0
 
Sept. 15, 2021, 10 p.m. 8.4 ppb (8) 1.3 ppb (2) 9.4 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 42.0 ppb (39) 0.24 ppb (3) 13.0 μg/m3 (13) 5.9 μg/m3 (25) 39.0
 
Sept. 15, 2021, 9 p.m. 6.7 ppb (7) 1.3 ppb (2) 8.8 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (2) 44.0 ppb (41) 0.23 ppb (3) 15.0 μg/m3 (14) 3.8 μg/m3 (16) 41.0
 
Sept. 15, 2021, 8 p.m. 7.8 ppb (8) 1.7 ppb (2) 10.0 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (2) 44.0 ppb (41) 0.35 ppb (4) 17.0 μg/m3 (16) 4.6 μg/m3 (20) 41.0
 
Sept. 15, 2021, 7 p.m. 10.4 ppb (10) 2.7 ppb (3) 9.4 ppb (9) 8.0 ppb (8) N/A 1.0 ppb (2) 43.0 ppb (40) 0.91 ppb (11) 21.0 μg/m3 (20) 4.9 μg/m3 (21) 40.0
 
Sept. 15, 2021, 6 p.m. 4.9 ppb (5) 1.1 ppb (2) 7.2 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (2) 43.0 ppb (40) 0.25 ppb (3) 15.0 μg/m3 (14) 4.9 μg/m3 (21) 40.0
 
Sept. 15, 2021, 5 p.m. 8.8 ppb (9) 3.0 ppb (3) 11.0 ppb (11) 6.0 ppb (6) N/A 1.0 ppb (2) 34.0 ppb (32) 0.23 ppb (3) 19.0 μg/m3 (18) 6.8 μg/m3 (29) 32.0
 
Sept. 15, 2021, 4 p.m. 14.5 ppb (14) 4.6 ppb (5) 15.8 ppb (15) 10.0 ppb (10) N/A 1.0 ppb (2) 26.0 ppb (25) 0.25 ppb (3) 29.0 μg/m3 (27) 7.9 μg/m3 (33) 33.0