AQSQID: 295100094

Site Name: Forest Park

Location: St. Louis (No. 2), MO

Reporting: True, Located: True

Current AQI: 63.0

St. Louis (No. 2) MO, US: 38.631057, -90.281144

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2019, 5 a.m. 10.4 ppb (10) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A 18.2 μg/m3 (63) 63.0
 
Sept. 21, 2019, 4 a.m. 12.8 ppb (12) 3.1 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A 11.4 μg/m3 (48) 48.0
 
Sept. 21, 2019, 3 a.m. 13.9 ppb (13) 3.7 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 2 a.m. 10.8 ppb (10) 3.3 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 8.3 μg/m3 (35) 35.0
 
Sept. 21, 2019, 1 a.m. 10.1 ppb (9) 3.1 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 10.3 μg/m3 (43) 43.0
 
Sept. 21, 2019, midnight 15.0 ppb (14) 4.5 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.39 ppb (4) N/A 4.1 μg/m3 (17) 17.0
 
Sept. 20, 2019, 11 p.m. 9.6 ppb (9) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 20, 2019, 10 p.m. 6.6 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (3) N/A 20.1 μg/m3 (67) 67.0
 
Sept. 20, 2019, 9 p.m. 11.1 ppb (10) 3.5 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.38 ppb (4) N/A 3.6 μg/m3 (15) 15.0
 
Sept. 20, 2019, 8 p.m. 12.2 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.37 ppb (4) N/A N/A 11.0
 
Sept. 20, 2019, 7 p.m. 13.9 ppb (13) 5.2 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.36 ppb (4) N/A N/A 13.0
 
Sept. 20, 2019, 6 p.m. 14.7 ppb (14) 5.8 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.38 ppb (4) N/A N/A 14.0
 
Sept. 20, 2019, 5 p.m. 15.4 ppb (14) 5.9 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.37 ppb (4) N/A 2.4 μg/m3 (10) 14.0
 
Sept. 20, 2019, 4 p.m. 15.7 ppb (15) 5.6 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.39 ppb (4) N/A 13.4 μg/m3 (53) 53.0
 
Sept. 20, 2019, 3 p.m. 18.2 ppb (17) 7.3 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.39 ppb (4) N/A 21.3 μg/m3 (70) 70.0
 
Sept. 20, 2019, 2 p.m. 29.5 ppb (27) 13.5 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.53 ppb (6) N/A 17.7 μg/m3 (62) 62.0
 
Sept. 20, 2019, 1 p.m. 35.3 ppb (33) 14.5 ppb (13) N/A 21.0 ppb (19) N/A N/A N/A 0.55 ppb (6) N/A 16.3 μg/m3 (59) 59.0
 
Sept. 20, 2019, noon 44.1 ppb (41) 14.3 ppb (13) N/A 30.0 ppb (28) N/A N/A N/A 0.62 ppb (7) N/A 12.9 μg/m3 (52) 52.0
 
Sept. 20, 2019, 11 a.m. 30.1 ppb (28) 7.8 ppb (7) N/A 22.0 ppb (20) N/A N/A N/A 0.5 ppb (6) N/A 17.6 μg/m3 (62) 62.0
 
Sept. 20, 2019, 10 a.m. 20.8 ppb (19) 3.7 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.4 ppb (4) N/A 13.3 μg/m3 (53) 53.0
 
Sept. 20, 2019, 9 a.m. 16.9 ppb (16) 2.2 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.31 ppb (3) N/A 18.2 μg/m3 (63) 63.0
 
Sept. 20, 2019, 8 a.m. 15.5 ppb (14) 1.1 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.32 ppb (4) N/A 21.9 μg/m3 (71) 71.0
 
Sept. 20, 2019, 7 a.m. 20.4 ppb (19) 1.4 ppb (1) N/A 19.0 ppb (18) N/A N/A N/A 0.31 ppb (3) N/A 13.5 μg/m3 (53) 53.0
 
Sept. 20, 2019, 6 a.m. 19.5 ppb (18) 0.9 ppb (1) N/A 19.0 ppb (18) N/A N/A N/A 0.32 ppb (4) N/A 15.3 μg/m3 (57) 57.0
 
Sept. 20, 2019, 5 a.m. 17.0 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.34 ppb (4) N/A 21.5 μg/m3 (70) 70.0
 
Sept. 20, 2019, 4 a.m. 12.5 ppb (12) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.35 ppb (4) N/A 13.5 μg/m3 (53) 53.0
 
Sept. 20, 2019, 3 a.m. 18.0 ppb (17) 2.8 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.36 ppb (4) N/A 12.8 μg/m3 (52) 52.0
 
Sept. 20, 2019, 2 a.m. 20.2 ppb (19) 2.1 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.44 ppb (5) N/A 15.9 μg/m3 (58) 58.0
 
Sept. 20, 2019, 1 a.m. 13.6 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 10.2 μg/m3 (42) 42.0
 
Sept. 20, 2019, midnight 16.2 ppb (15) 2.3 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 18.2 μg/m3 (63) 63.0
 
Sept. 19, 2019, 11 p.m. 12.8 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.41 ppb (5) N/A 17.6 μg/m3 (62) 62.0
 
Sept. 19, 2019, 10 p.m. 11.6 ppb (11) 2.4 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 46.6 μg/m3 (128) 128.0
 
Sept. 19, 2019, 9 p.m. 8.1 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 28.3 μg/m3 (85) 85.0
 
Sept. 19, 2019, 8 p.m. 13.6 ppb (13) 2.9 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.36 ppb (4) N/A N/A 13.0
 
Sept. 19, 2019, 7 p.m. 12.9 ppb (12) 2.9 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A N/A 12.0
 
Sept. 19, 2019, 6 p.m. 12.4 ppb (11) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A N/A 11.0
 
Sept. 19, 2019, 5 p.m. 22.4 ppb (21) 7.2 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.37 ppb (4) N/A N/A 21.0
 
Sept. 19, 2019, 4 p.m. 22.8 ppb (21) 6.2 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.39 ppb (4) N/A 0.3 μg/m3 (1) 21.0
 
Sept. 19, 2019, 3 p.m. 28.2 ppb (26) 8.6 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 19, 2019, 2 p.m. 29.9 ppb (28) 9.3 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A 0.43 ppb (5) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 19, 2019, 1 p.m. 31.2 ppb (29) 8.8 ppb (8) N/A 22.0 ppb (20) N/A N/A N/A 0.45 ppb (5) N/A 9.4 μg/m3 (39) 39.0
 
Sept. 19, 2019, noon 39.0 ppb (36) 14.9 ppb (14) N/A 24.0 ppb (22) N/A N/A N/A 0.52 ppb (6) N/A 9.8 μg/m3 (41) 41.0
 
Sept. 19, 2019, 11 a.m. 38.9 ppb (36) 12.9 ppb (12) N/A 26.0 ppb (24) N/A N/A N/A 0.53 ppb (6) N/A 17.4 μg/m3 (61) 61.0
 
Sept. 19, 2019, 10 a.m. 38.5 ppb (36) 8.5 ppb (8) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 11.6 μg/m3 (48) 48.0
 
Sept. 19, 2019, 9 a.m. 16.8 ppb (16) 2.3 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.25 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
Sept. 19, 2019, 8 a.m. 12.2 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 14.2 μg/m3 (55) 55.0
 
Sept. 19, 2019, 7 a.m. 14.6 ppb (14) 1.7 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 11.7 μg/m3 (49) 49.0
 
Sept. 19, 2019, 6 a.m. 9.0 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
Sept. 19, 2019, 5 a.m. 15.9 ppb (15) 1.1 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
Sept. 19, 2019, 4 a.m. 16.3 ppb (15) 1.2 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.26 ppb (3) N/A 16.9 μg/m3 (60) 60.0
 
Sept. 19, 2019, 3 a.m. 20.5 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (3) N/A 13.8 μg/m3 (54) 54.0
 
Sept. 19, 2019, 2 a.m. 21.4 ppb (20) 2.4 ppb (2) N/A 19.0 ppb (18) N/A N/A N/A 0.33 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 19, 2019, 1 a.m. 14.9 ppb (14) 1.8 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 8.9 μg/m3 (37) 37.0
 
Sept. 19, 2019, midnight 10.4 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.28 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 18, 2019, 11 p.m. 6.4 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 18, 2019, 10 p.m. 4.1 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 5.1 μg/m3 (21) 21.0
 
Sept. 18, 2019, 9 p.m. 4.0 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A N/A 4.0
 
Sept. 18, 2019, 8 p.m. 6.6 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 14.6 μg/m3 (56) 56.0
 
Sept. 18, 2019, 7 p.m. 8.7 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 7.2 μg/m3 (30) 30.0
 
Sept. 18, 2019, 6 p.m. 8.7 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 44.6 μg/m3 (123) 123.0
 
Sept. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A 0.28 ppb (3) N/A N/A 3.0
 
Sept. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A 0.31 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Sept. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A 0.34 ppb (4) N/A 0.0 μg/m3 (0) 4.0
 
Sept. 18, 2019, 2 p.m. 20.7 ppb (19) 9.0 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.36 ppb (4) N/A N/A 19.0
 
Sept. 18, 2019, 1 p.m. 19.5 ppb (18) 7.3 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A N/A 18.0
 
Sept. 18, 2019, noon 44.2 ppb (41) 20.1 ppb (19) N/A 24.0 ppb (22) N/A N/A N/A 0.39 ppb (4) N/A N/A 41.0
 
Sept. 18, 2019, 11 a.m. 41.8 ppb (39) 14.5 ppb (13) N/A 27.0 ppb (25) N/A N/A N/A 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2019, 10 a.m. 19.4 ppb (18) 3.9 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 9 a.m. 10.8 ppb (10) 2.1 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 4.5 μg/m3 (19) 19.0
 
Sept. 18, 2019, 8 a.m. 8.3 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.19 ppb (2) N/A 4.1 μg/m3 (17) 17.0
 
Sept. 18, 2019, 7 a.m. 7.4 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) N/A 15.1 μg/m3 (57) 57.0
 
Sept. 18, 2019, 6 a.m. 8.2 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 8.2 μg/m3 (34) 34.0
 
Sept. 18, 2019, 5 a.m. 7.9 ppb (7) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.19 ppb (2) N/A 13.4 μg/m3 (53) 53.0
 
Sept. 18, 2019, 4 a.m. 7.5 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
Sept. 18, 2019, 3 a.m. 6.7 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 15.6 μg/m3 (58) 58.0
 
Sept. 18, 2019, 2 a.m. 7.1 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 13.2 μg/m3 (53) 53.0
 
Sept. 18, 2019, 1 a.m. 11.4 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A 15.6 μg/m3 (58) 58.0
 
Sept. 18, 2019, midnight 3.3 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 5.6 μg/m3 (23) 23.0
 
Sept. 17, 2019, 11 p.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 17, 2019, 10 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A 12.8 μg/m3 (52) 52.0
 
Sept. 17, 2019, 9 p.m. 2.9 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 21.5 μg/m3 (70) 70.0
 
Sept. 17, 2019, 8 p.m. 4.9 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A 3.4 μg/m3 (14) 14.0
 
Sept. 17, 2019, 7 p.m. 16.1 ppb (15) 10.3 ppb (10) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 37.7 μg/m3 (106) 106.0
 
Sept. 17, 2019, 6 p.m. 13.7 ppb (13) 5.8 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.46 ppb (5) N/A 17.3 μg/m3 (61) 61.0
 
Sept. 17, 2019, 5 p.m. 11.8 ppb (11) 3.2 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A 13.4 μg/m3 (53) 53.0
 
Sept. 17, 2019, 4 p.m. 25.0 ppb (23) 9.9 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A 0.29 ppb (3) N/A 15.2 μg/m3 (57) 57.0
 
Sept. 17, 2019, 3 p.m. 22.6 ppb (21) 8.1 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.31 ppb (3) N/A 17.1 μg/m3 (61) 61.0
 
Sept. 17, 2019, 2 p.m. 22.6 ppb (21) 8.5 ppb (8) N/A 14.0 ppb (13) N/A N/A N/A 0.34 ppb (4) N/A 19.2 μg/m3 (65) 65.0
 
Sept. 17, 2019, 1 p.m. 14.4 ppb (13) 3.7 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.29 ppb (3) N/A 11.4 μg/m3 (48) 48.0
 
Sept. 17, 2019, noon 17.8 ppb (16) 4.3 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.31 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
Sept. 17, 2019, 11 a.m. 10.5 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A 14.3 μg/m3 (55) 55.0
 
Sept. 17, 2019, 10 a.m. 8.0 ppb (7) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 17, 2019, 9 a.m. 8.9 ppb (8) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.19 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
Sept. 17, 2019, 8 a.m. 4.6 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
Sept. 17, 2019, 7 a.m. 4.3 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 13.3 μg/m3 (53) 53.0
 
Sept. 17, 2019, 6 a.m. 3.9 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 8.2 μg/m3 (34) 34.0
 
Sept. 17, 2019, 5 a.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 17, 2019, 4 a.m. 9.2 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 12.6 μg/m3 (51) 51.0
 
Sept. 17, 2019, 3 a.m. 12.7 ppb (12) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2019, 2 a.m. 9.6 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 14.4 μg/m3 (55) 55.0
 
Sept. 17, 2019, 1 a.m. 7.8 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 13.1 μg/m3 (52) 52.0
 
Sept. 17, 2019, midnight 3.7 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (3) N/A 11.8 μg/m3 (49) 49.0
 
Sept. 16, 2019, 11 p.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 15.5 μg/m3 (57) 57.0
 
Sept. 16, 2019, 10 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 10.5 μg/m3 (44) 44.0
 
Sept. 16, 2019, 9 p.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 11.6 μg/m3 (48) 48.0
 
Sept. 16, 2019, 8 p.m. 9.5 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 17.5 μg/m3 (62) 62.0
 
Sept. 16, 2019, 7 p.m. 11.4 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A N/A 11.0
 
Sept. 16, 2019, 6 p.m. 4.8 ppb (4) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A N/A 4.0
 
Sept. 16, 2019, 5 p.m. 4.5 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.26 ppb (3) N/A -3.8 μg/m3 (0) 4.0
 
Sept. 16, 2019, 4 p.m. 6.8 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A 17.1 μg/m3 (61) 61.0
 
Sept. 16, 2019, 3 p.m. 6.8 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 16, 2019, 2 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.31 ppb (3) N/A 16.8 μg/m3 (60) 60.0
 
Sept. 16, 2019, 1 p.m. 24.8 ppb (23) 9.9 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 16.9 μg/m3 (60) 60.0
 
Sept. 16, 2019, noon 24.5 ppb (23) 9.3 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A 0.47 ppb (5) N/A 11.6 μg/m3 (48) 48.0
 
Sept. 16, 2019, 11 a.m. 20.8 ppb (19) 7.5 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 12.9 μg/m3 (52) 52.0
 
Sept. 16, 2019, 10 a.m. 12.0 ppb (11) 3.6 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.34 ppb (4) N/A 18.7 μg/m3 (64) 64.0
 
Sept. 16, 2019, 9 a.m. 6.4 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 10.6 μg/m3 (44) 44.0
 
Sept. 16, 2019, 8 a.m. 7.8 ppb (7) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 12.6 μg/m3 (51) 51.0
 
Sept. 16, 2019, 7 a.m. 21.8 ppb (20) 1.7 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A 0.32 ppb (4) N/A 12.7 μg/m3 (51) 51.0
 
Sept. 16, 2019, 6 a.m. 18.6 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A N/A 0.31 ppb (3) N/A 16.8 μg/m3 (60) 60.0
 
Sept. 16, 2019, 5 a.m. 19.0 ppb (18) 2.4 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.4 ppb (4) N/A 21.4 μg/m3 (70) 70.0
 
Sept. 16, 2019, 4 a.m. 15.3 ppb (14) 1.4 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.38 ppb (4) N/A 21.3 μg/m3 (70) 70.0
 
Sept. 16, 2019, 3 a.m. 13.6 ppb (13) 1.3 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 16, 2019, 2 a.m. 13.1 ppb (12) 1.6 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 7.5 μg/m3 (31) 31.0
 
Sept. 16, 2019, 1 a.m. 14.0 ppb (13) 1.7 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 2.3 μg/m3 (10) 13.0
 
Sept. 16, 2019, midnight 10.6 ppb (10) 1.4 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 21.4 μg/m3 (70) 70.0
 
Sept. 15, 2019, 11 p.m. 8.6 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 12.5 μg/m3 (51) 51.0
 
Sept. 15, 2019, 10 p.m. 8.7 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 15.2 μg/m3 (57) 57.0
 
Sept. 15, 2019, 9 p.m. 6.6 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A N/A 6.0
 
Sept. 15, 2019, 8 p.m. 9.5 ppb (9) 2.9 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 14.8 μg/m3 (56) 56.0
 
Sept. 15, 2019, 7 p.m. 7.8 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 15, 2019, 6 p.m. 6.9 ppb (6) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 11.7 μg/m3 (49) 49.0
 
Sept. 15, 2019, 5 p.m. 5.1 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
Sept. 15, 2019, 4 p.m. 7.6 ppb (7) 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 8.7 μg/m3 (36) 36.0
 
Sept. 15, 2019, 3 p.m. 11.4 ppb (11) 3.4 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.34 ppb (4) N/A 12.7 μg/m3 (51) 51.0
 
Sept. 15, 2019, 2 p.m. 10.2 ppb (9) 3.1 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 15, 2019, 1 p.m. 12.6 ppb (12) 3.6 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.3 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
Sept. 15, 2019, noon 14.3 ppb (13) 3.3 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.32 ppb (4) N/A 7.8 μg/m3 (32) 32.0
 
Sept. 15, 2019, 11 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 15, 2019, 10 a.m. 11.3 ppb (10) 1.1 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 12.1 μg/m3 (50) 50.0
 
Sept. 15, 2019, 9 a.m. 16.2 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.32 ppb (4) N/A 9.3 μg/m3 (39) 39.0
 
Sept. 15, 2019, 8 a.m. 12.8 ppb (12) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.34 ppb (4) N/A 3.6 μg/m3 (15) 15.0
 
Sept. 15, 2019, 7 a.m. 19.1 ppb (18) 2.1 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.32 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
Sept. 15, 2019, 6 a.m. 24.4 ppb (23) 3.0 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A 0.51 ppb (6) N/A 5.9 μg/m3 (25) 25.0
 
Sept. 15, 2019, 5 a.m. 23.5 ppb (22) 3.9 ppb (4) N/A 20.0 ppb (19) N/A N/A N/A 0.53 ppb (6) N/A 8.3 μg/m3 (35) 35.0
 
Sept. 15, 2019, 4 a.m. 20.2 ppb (19) 3.5 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.41 ppb (5) N/A 2.2 μg/m3 (9) 19.0
 
Sept. 15, 2019, 3 a.m. 12.7 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.29 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
Sept. 15, 2019, 2 a.m. 12.6 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.35 ppb (4) N/A 5.3 μg/m3 (22) 22.0
 
Sept. 15, 2019, 1 a.m. 12.5 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 12.9 μg/m3 (52) 52.0
 
Sept. 15, 2019, midnight 10.4 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 12.3 μg/m3 (51) 51.0
 
Sept. 14, 2019, 11 p.m. 9.1 ppb (8) 3.5 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 4.8 μg/m3 (20) 20.0
 
Sept. 14, 2019, 10 p.m. 9.0 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 14, 2019, 9 p.m. 9.8 ppb (9) 4.5 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 14, 2019, 8 p.m. 10.1 ppb (9) 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 2.5 μg/m3 (10) 10.0
 
Sept. 14, 2019, 7 p.m. 8.9 ppb (8) 3.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 4.4 μg/m3 (18) 18.0
 
Sept. 14, 2019, 6 p.m. 9.1 ppb (8) 4.4 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
Sept. 14, 2019, 5 p.m. 10.9 ppb (10) 5.4 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A -0.9 μg/m3 (0) 10.0
 
Sept. 14, 2019, 4 p.m. 10.1 ppb (9) 5.4 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 2.9 μg/m3 (12) 12.0
 
Sept. 14, 2019, 3 p.m. 10.7 ppb (10) 5.7 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 2.4 μg/m3 (10) 10.0
 
Sept. 14, 2019, 2 p.m. 16.3 ppb (15) 8.5 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 5.4 μg/m3 (23) 23.0
 
Sept. 14, 2019, 1 p.m. 26.9 ppb (25) 14.6 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.41 ppb (5) N/A 4.2 μg/m3 (18) 25.0
 
Sept. 14, 2019, noon 42.9 ppb (40) 26.6 ppb (25) N/A 16.0 ppb (15) N/A N/A N/A 0.46 ppb (5) N/A 8.9 μg/m3 (37) 40.0
 
Sept. 14, 2019, 11 a.m. 32.3 ppb (30) 15.0 ppb (14) N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 4.6 μg/m3 (19) 30.0
 
Sept. 14, 2019, 10 a.m. 40.6 ppb (38) 20.8 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A 0.32 ppb (4) N/A 6.9 μg/m3 (29) 38.0
 
Sept. 14, 2019, 9 a.m. 35.4 ppb (33) 14.7 ppb (14) N/A 21.0 ppb (19) N/A N/A N/A 0.31 ppb (3) N/A 3.8 μg/m3 (16) 33.0
 
Sept. 14, 2019, 8 a.m. 22.8 ppb (21) 7.6 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.28 ppb (3) N/A 4.7 μg/m3 (20) 21.0
 
Sept. 14, 2019, 7 a.m. 7.4 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
Sept. 14, 2019, 6 a.m. 5.0 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) N/A 4.1 μg/m3 (17) 17.0