ID: 2215

AQSQID: 295100094

Site Name: Forest Park

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

Updated: Aug. 6, 2020, 9:42 p.m.

Location: Saint Louis (Forest Park), MO

Reporting: True, Located: True

Current AQI: 11.0

Saint Louis (Forest Park) MO, US: 38.631057, -90.281144

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Aug. 6, 2020, 8 p.m. 11.5 ppb (11) 3.5 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.3 ppb (3) N/A 2.3 μg/m3 (10) 11.0
 
Aug. 6, 2020, 7 p.m. 7.2 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
Aug. 6, 2020, 6 p.m. 4.5 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Aug. 6, 2020, 5 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 10.3 μg/m3 (43) 43.0
 
Aug. 6, 2020, 4 p.m. 4.2 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) N/A 7.3 μg/m3 (30) 30.0
 
Aug. 6, 2020, 3 p.m. 7.9 ppb (7) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 7.7 μg/m3 (32) 32.0
 
Aug. 6, 2020, 2 p.m. 20.1 ppb (19) 8.0 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
Aug. 6, 2020, 1 p.m. 32.7 ppb (30) 16.5 ppb (15) N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A 11.9 μg/m3 (50) 50.0
 
Aug. 6, 2020, noon 32.8 ppb (30) 17.6 ppb (16) N/A 15.0 ppb (14) N/A N/A N/A 0.44 ppb (5) N/A 11.9 μg/m3 (50) 50.0
 
Aug. 6, 2020, 11 a.m. 49.8 ppb (46) 33.1 ppb (31) N/A 17.0 ppb (16) N/A N/A N/A 0.57 ppb (6) N/A 12.2 μg/m3 (50) 50.0
 
Aug. 6, 2020, 10 a.m. 24.8 ppb (23) 8.0 ppb (7) N/A 17.0 ppb (16) N/A N/A N/A 0.46 ppb (5) N/A 12.7 μg/m3 (51) 51.0
 
Aug. 6, 2020, 9 a.m. 14.2 ppb (13) 1.3 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A 0.37 ppb (4) N/A 10.9 μg/m3 (45) 45.0
 
Aug. 6, 2020, 8 a.m. 13.8 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (13) N/A N/A N/A 0.3 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
Aug. 6, 2020, 7 a.m. 24.0 ppb (22) 3.3 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A 0.27 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
Aug. 6, 2020, 6 a.m. 15.9 ppb (15) 0.5 ppb (0) N/A 15.0 ppb (14) N/A N/A N/A 0.23 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
Aug. 6, 2020, 5 a.m. 23.3 ppb (22) 2.7 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A 0.32 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Aug. 6, 2020, 4 a.m. 23.3 ppb (22) 1.9 ppb (2) N/A 21.0 ppb (19) N/A N/A N/A 0.35 ppb (4) N/A 6.3 μg/m3 (26) 26.0
 
Aug. 6, 2020, 3 a.m. 22.9 ppb (21) 3.3 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A 0.33 ppb (4) N/A 5.5 μg/m3 (23) 23.0
 
Aug. 6, 2020, 2 a.m. 21.0 ppb (19) 4.1 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.33 ppb (4) N/A 10.3 μg/m3 (43) 43.0
 
Aug. 6, 2020, 1 a.m. 10.1 ppb (9) 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 9.0
 
Aug. 6, 2020, midnight 1.4 ppb (1) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Aug. 5, 2020, 11 p.m. 1.5 ppb (1) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 2.6 μg/m3 (11) 11.0
 
Aug. 5, 2020, 10 p.m. 1.1 ppb (1) -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 6.6 μg/m3 (28) 28.0
 
Aug. 5, 2020, 9 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 7.9 μg/m3 (33) 33.0
 
Aug. 5, 2020, 8 p.m. 1.3 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 5.4 μg/m3 (23) 23.0
 
Aug. 5, 2020, 7 p.m. 8.3 ppb (8) 3.5 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A 5.8 μg/m3 (24) 24.0
 
Aug. 5, 2020, 6 p.m. 4.9 ppb (5) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 7.2 μg/m3 (30) 30.0
 
Aug. 5, 2020, 5 p.m. 4.6 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 2.9 μg/m3 (12) 12.0
 
Aug. 5, 2020, 4 p.m. 6.8 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.16 ppb (2) N/A 6.1 μg/m3 (25) 25.0
 
Aug. 5, 2020, 3 p.m. 20.2 ppb (19) 7.4 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 7.8 μg/m3 (32) 32.0
 
Aug. 5, 2020, 2 p.m. 29.7 ppb (28) 13.8 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.36 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
Aug. 5, 2020, 1 p.m. 38.9 ppb (36) 23.9 ppb (22) N/A 15.0 ppb (14) N/A N/A N/A 0.48 ppb (5) N/A 9.3 μg/m3 (39) 39.0
 
Aug. 5, 2020, noon 22.9 ppb (21) 13.7 ppb (13) N/A 9.0 ppb (8) N/A N/A N/A 0.45 ppb (5) N/A 13.8 μg/m3 (54) 54.0
 
Aug. 5, 2020, 11 a.m. 37.7 ppb (35) 24.1 ppb (22) N/A 14.0 ppb (13) N/A N/A N/A 0.45 ppb (5) N/A 7.1 μg/m3 (30) 35.0
 
Aug. 5, 2020, 10 a.m. 12.1 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.3 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
Aug. 5, 2020, 9 a.m. 8.1 ppb (8) -0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.28 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
Aug. 5, 2020, 8 a.m. 9.1 ppb (8) -0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.3 ppb (3) N/A 8.4 μg/m3 (35) 35.0
 
Aug. 5, 2020, 7 a.m. 8.4 ppb (8) -0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A 7.8 μg/m3 (32) 32.0
 
Aug. 5, 2020, 6 a.m. 9.3 ppb (9) -0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.3 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Aug. 5, 2020, 5 a.m. 11.2 ppb (10) -0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A 0.33 ppb (4) N/A 6.6 μg/m3 (28) 28.0
 
Aug. 5, 2020, 4 a.m. 11.5 ppb (11) -0.6 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A 0.32 ppb (4) N/A 7.9 μg/m3 (33) 33.0
 
Aug. 5, 2020, 3 a.m. 9.3 ppb (9) -0.7 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.29 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
Aug. 5, 2020, 2 a.m. 5.5 ppb (5) -0.7 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
Aug. 5, 2020, 1 a.m. 2.7 ppb (3) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 1.2 μg/m3 (5) 5.0
 
Aug. 5, 2020, midnight -0.2 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 3.6 μg/m3 (15) 15.0
 
Aug. 4, 2020, 11 p.m. -0.3 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 4.3 μg/m3 (18) 18.0
 
Aug. 4, 2020, 10 p.m. -0.3 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 3.1 μg/m3 (13) 13.0
 
Aug. 4, 2020, 9 p.m. 0.0 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A 2.8 μg/m3 (12) 12.0
 
Aug. 4, 2020, 8 p.m. 0.6 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 0.0 μg/m3 (0) 2.0
 
Aug. 4, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
Aug. 4, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A N/A 0.14 ppb (2) N/A N/A 2.0
 
Aug. 4, 2020, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
Aug. 4, 2020, 4 p.m. 7.6 ppb (7) 3.5 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.14 ppb (2) N/A 5.6 μg/m3 (23) 23.0
 
Aug. 4, 2020, 3 p.m. 8.5 ppb (8) 4.6 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.13 ppb (1) N/A 6.4 μg/m3 (27) 27.0
 
Aug. 4, 2020, 2 p.m. 5.6 ppb (5) 3.6 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
Aug. 4, 2020, 1 p.m. 9.3 ppb (9) 5.4 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A 0.15 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
Aug. 4, 2020, noon 6.6 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.15 ppb (2) N/A 4.3 μg/m3 (18) 18.0
 
Aug. 4, 2020, 11 a.m. 24.2 ppb (22) 14.4 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 22.0
 
Aug. 4, 2020, 10 a.m. 1.5 ppb (1) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.12 ppb (1) N/A 2.6 μg/m3 (11) 11.0
 
Aug. 4, 2020, 9 a.m. 0.7 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 5.8 μg/m3 (24) 24.0
 
Aug. 4, 2020, 8 a.m. 2.3 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 6.1 μg/m3 (25) 25.0
 
Aug. 4, 2020, 7 a.m. 0.9 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 6.7 μg/m3 (28) 28.0
 
Aug. 4, 2020, 6 a.m. 0.7 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 3.9 μg/m3 (16) 16.0
 
Aug. 4, 2020, 5 a.m. 1.4 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 4.5 μg/m3 (19) 19.0
 
Aug. 4, 2020, 4 a.m. 0.8 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 1.3 μg/m3 (5) 5.0
 
Aug. 4, 2020, 3 a.m. 0.7 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A -1.7 μg/m3 (0) 2.0
 
Aug. 4, 2020, 2 a.m. 0.7 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A -0.1 μg/m3 (0) 2.0
 
Aug. 4, 2020, 1 a.m. -0.2 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 3.1 μg/m3 (13) 13.0
 
Aug. 4, 2020, midnight -0.3 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 8.1 μg/m3 (34) 34.0
 
Aug. 3, 2020, 11 p.m. 0.2 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 2.8 μg/m3 (12) 12.0
 
Aug. 3, 2020, 10 p.m. -0.2 ppb (0) -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 3.4 μg/m3 (14) 14.0
 
Aug. 3, 2020, 9 p.m. -0.3 ppb (0) -0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 2.5 μg/m3 (10) 10.0
 
Aug. 3, 2020, 8 p.m. -0.1 ppb (0) -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
Aug. 3, 2020, 7 p.m. 1.1 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Aug. 3, 2020, 6 p.m. 2.2 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 3.2 μg/m3 (13) 13.0
 
Aug. 3, 2020, 5 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 6.7 μg/m3 (28) 28.0
 
Aug. 3, 2020, 4 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
Aug. 3, 2020, 3 p.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
Aug. 3, 2020, 2 p.m. 5.7 ppb (5) 2.8 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
Aug. 3, 2020, 1 p.m. 8.9 ppb (8) 3.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 3.4 μg/m3 (14) 14.0
 
Aug. 3, 2020, noon 12.3 ppb (11) 5.9 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 5.6 μg/m3 (23) 23.0
 
Aug. 3, 2020, 11 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 9.4 μg/m3 (39) 39.0
 
Aug. 3, 2020, 10 a.m. 4.4 ppb (4) -0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.14 ppb (2) N/A 5.1 μg/m3 (21) 21.0
 
Aug. 3, 2020, 9 a.m. 2.5 ppb (2) -0.6 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
Aug. 3, 2020, 8 a.m. 1.3 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
Aug. 3, 2020, 7 a.m. 0.8 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 9.4 μg/m3 (39) 39.0
 
Aug. 3, 2020, 6 a.m. 0.1 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Aug. 3, 2020, 5 a.m. -0.7 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
Aug. 3, 2020, 4 a.m. 1.1 ppb (1) -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Aug. 3, 2020, 3 a.m. 5.6 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
Aug. 3, 2020, 2 a.m. 7.2 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Aug. 3, 2020, 1 a.m. 8.7 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 5.6 μg/m3 (23) 23.0
 
Aug. 3, 2020, midnight 7.1 ppb (7) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 6.5 μg/m3 (27) 27.0
 
Aug. 2, 2020, 11 p.m. 6.8 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 4.6 μg/m3 (19) 19.0
 
Aug. 2, 2020, 10 p.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 10.3 μg/m3 (43) 43.0
 
Aug. 2, 2020, 9 p.m. -0.7 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.15 ppb (2) N/A 5.5 μg/m3 (23) 23.0
 
Aug. 2, 2020, 8 p.m. -0.2 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.17 ppb (2) N/A 5.1 μg/m3 (21) 21.0
 
Aug. 2, 2020, 7 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
Aug. 2, 2020, 6 p.m. 4.0 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Aug. 2, 2020, 5 p.m. 4.0 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Aug. 2, 2020, 4 p.m. 2.5 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
Aug. 2, 2020, 3 p.m. 4.3 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Aug. 2, 2020, 2 p.m. 3.8 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 6.5 μg/m3 (27) 27.0
 
Aug. 2, 2020, 1 p.m. 2.7 ppb (3) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
Aug. 2, 2020, noon 14.4 ppb (13) 6.9 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Aug. 2, 2020, 11 a.m. 9.8 ppb (9) 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Aug. 2, 2020, 10 a.m. 11.2 ppb (10) 1.4 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 10.6 μg/m3 (44) 44.0
 
Aug. 2, 2020, 9 a.m. 20.1 ppb (19) 4.7 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A 0.22 ppb (2) N/A 9.5 μg/m3 (40) 40.0
 
Aug. 2, 2020, 8 a.m. 17.7 ppb (16) 4.5 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Aug. 2, 2020, 7 a.m. 7.2 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 9.6 μg/m3 (40) 40.0
 
Aug. 2, 2020, 6 a.m. 5.3 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 11.2 μg/m3 (47) 47.0
 
Aug. 2, 2020, 5 a.m. 8.5 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 7.2 μg/m3 (30) 30.0
 
Aug. 2, 2020, 4 a.m. 11.1 ppb (10) 2.1 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 14.6 μg/m3 (56) 56.0
 
Aug. 2, 2020, 3 a.m. 10.5 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.43 ppb (5) N/A 14.3 μg/m3 (55) 55.0
 
Aug. 2, 2020, 2 a.m. 13.4 ppb (12) 1.2 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.47 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Aug. 2, 2020, 1 a.m. 13.0 ppb (12) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 9.7 μg/m3 (40) 40.0
 
Aug. 2, 2020, midnight 4.9 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
Aug. 1, 2020, 11 p.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 8.5 μg/m3 (35) 35.0
 
Aug. 1, 2020, 10 p.m. 3.8 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
Aug. 1, 2020, 9 p.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (3) N/A 3.6 μg/m3 (15) 15.0
 
Aug. 1, 2020, 8 p.m. 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 6.2 μg/m3 (26) 26.0
 
Aug. 1, 2020, 7 p.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
Aug. 1, 2020, 6 p.m. -0.3 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A 3.6 μg/m3 (15) 15.0
 
Aug. 1, 2020, 5 p.m. -0.7 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.13 ppb (1) N/A 5.8 μg/m3 (24) 24.0
 
Aug. 1, 2020, 4 p.m. -0.2 ppb (0) -0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.14 ppb (2) N/A 1.8 μg/m3 (8) 8.0
 
Aug. 1, 2020, 3 p.m. 0.4 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 2.7 μg/m3 (11) 11.0
 
Aug. 1, 2020, 2 p.m. 0.1 ppb (0) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 4.1 μg/m3 (17) 17.0
 
Aug. 1, 2020, 1 p.m. 0.2 ppb (0) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 4.8 μg/m3 (20) 20.0
 
Aug. 1, 2020, noon -0.2 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 6.1 μg/m3 (25) 25.0
 
Aug. 1, 2020, 11 a.m. -0.4 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 4.9 μg/m3 (20) 20.0
 
Aug. 1, 2020, 10 a.m. -0.1 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.12 ppb (1) N/A 7.3 μg/m3 (30) 30.0
 
Aug. 1, 2020, 9 a.m. 0.0 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 3.5 μg/m3 (15) 15.0
 
Aug. 1, 2020, 8 a.m. 0.2 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 2.7 μg/m3 (11) 11.0
 
Aug. 1, 2020, 7 a.m. -0.6 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 7.9 μg/m3 (33) 33.0
 
Aug. 1, 2020, 6 a.m. 0.2 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Aug. 1, 2020, 5 a.m. 1.5 ppb (1) -0.8 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 7.7 μg/m3 (32) 32.0
 
Aug. 1, 2020, 4 a.m. 0.6 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Aug. 1, 2020, 3 a.m. 1.0 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
Aug. 1, 2020, 2 a.m. 1.4 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 3.9 μg/m3 (16) 16.0
 
Aug. 1, 2020, 1 a.m. 1.0 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 9.4 μg/m3 (39) 39.0
 
Aug. 1, 2020, midnight 1.2 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
July 31, 2020, 11 p.m. 0.9 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
July 31, 2020, 10 p.m. 0.1 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 5.1 μg/m3 (21) 21.0
 
July 31, 2020, 9 p.m. 0.6 ppb (1) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 2.5 μg/m3 (10) 10.0
 
July 31, 2020, 8 p.m. 1.1 ppb (1) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
July 31, 2020, 7 p.m. 5.6 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
July 31, 2020, 6 p.m. 3.6 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 9.8 μg/m3 (41) 41.0
 
July 31, 2020, 5 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
July 31, 2020, 4 p.m. 4.6 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
July 31, 2020, 3 p.m. 5.7 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
July 31, 2020, 2 p.m. 7.4 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
July 31, 2020, 1 p.m. 6.5 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
July 31, 2020, noon 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
July 31, 2020, 11 a.m. 1.9 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 7.5 μg/m3 (31) 31.0
 
July 31, 2020, 10 a.m. 0.9 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
July 31, 2020, 9 a.m. 0.1 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.12 ppb (1) N/A 6.7 μg/m3 (28) 28.0
 
July 31, 2020, 8 a.m. 0.4 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 7.4 μg/m3 (31) 31.0
 
July 31, 2020, 7 a.m. 1.0 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.12 ppb (1) N/A 8.7 μg/m3 (36) 36.0
 
July 31, 2020, 6 a.m. 0.5 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.12 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
July 31, 2020, 5 a.m. 0.4 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.11 ppb (1) N/A 5.5 μg/m3 (23) 23.0
 
July 31, 2020, 4 a.m. 0.4 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.12 ppb (1) N/A 2.6 μg/m3 (11) 11.0
 
July 31, 2020, 3 a.m. 0.3 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.12 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
July 31, 2020, 2 a.m. 0.1 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.12 ppb (1) N/A 4.1 μg/m3 (17) 17.0
 
July 31, 2020, 1 a.m. 0.6 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 2.5 μg/m3 (10) 10.0
 
July 31, 2020, midnight 0.0 ppb (0) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 3.2 μg/m3 (13) 13.0
 
July 30, 2020, 11 p.m. 0.9 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) N/A 2.1 μg/m3 (9) 9.0
 
July 30, 2020, 10 p.m. 1.1 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.13 ppb (1) N/A 4.9 μg/m3 (20) 20.0
 
July 30, 2020, 9 p.m. -0.1 ppb (0) -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.12 ppb (1) N/A 0.8 μg/m3 (3) 3.0