AQSQID: 295100085

Site Name: Blair Street

Location: St. Louis (Buchanan St), MO

Reporting: True, Located: True

Current AQI: 27.0

St. Louis (Buchanan St) MO, US: 38.656449, -90.198548

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 15, 2019, 5 a.m. 13.6 ppb (13) 0.3 ppb (0) 14.2 ppb (13) 14.0 ppb (13) N/A 2.0 ppb (3) 29.0 ppb (22) 0.29 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 15, 2019, 4 a.m. 11.7 ppb (11) 0.4 ppb (0) 11.6 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 27.0 ppb (21) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
Sept. 15, 2019, 3 a.m. 10.8 ppb (10) 0.3 ppb (0) 10.7 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (22) 0.24 ppb (3) N/A 2.2 μg/m3 (9) 22.0
 
Sept. 15, 2019, 2 a.m. 10.3 ppb (10) 0.3 ppb (0) 10.6 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) 0.26 ppb (3) N/A 2.8 μg/m3 (12) 22.0
 
Sept. 15, 2019, 1 a.m. 7.4 ppb (7) 0.3 ppb (0) 7.4 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.25 ppb (3) N/A 3.1 μg/m3 (13) 26.0
 
Sept. 15, 2019, midnight 6.4 ppb (6) 0.5 ppb (0) 6.4 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 27.0
 
Sept. 14, 2019, 11 p.m. 4.7 ppb (4) 0.4 ppb (0) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.23 ppb (3) N/A 3.7 μg/m3 (15) 29.0
 
Sept. 14, 2019, 10 p.m. 3.9 ppb (4) 0.5 ppb (0) 4.5 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 44.0 ppb (34) 0.22 ppb (2) N/A 3.2 μg/m3 (13) 34.0
 
Sept. 14, 2019, 9 p.m. 3.8 ppb (4) 0.7 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 46.0 ppb (35) 0.23 ppb (3) N/A 1.6 μg/m3 (7) 35.0
 
Sept. 14, 2019, 8 p.m. 3.1 ppb (3) 0.9 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.2 ppb (2) N/A -1.2 μg/m3 (0) 32.0
 
Sept. 14, 2019, 7 p.m. 1.8 ppb (2) 0.5 ppb (0) 2.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.2 ppb (2) N/A 1.2 μg/m3 (5) 29.0
 
Sept. 14, 2019, 6 p.m. 3.6 ppb (3) 1.1 ppb (1) 4.3 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.21 ppb (2) N/A 4.6 μg/m3 (19) 28.0
 
Sept. 14, 2019, 5 p.m. 3.3 ppb (3) 1.3 ppb (1) 4.9 ppb (5) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.21 ppb (2) N/A 4.8 μg/m3 (20) 28.0
 
Sept. 14, 2019, 4 p.m. 3.2 ppb (3) 1.1 ppb (1) 4.3 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 14, 2019, 3 p.m. 8.1 ppb (8) 2.7 ppb (3) 8.6 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.25 ppb (3) N/A 0.7 μg/m3 (3) 21.0
 
Sept. 14, 2019, 2 p.m. 15.8 ppb (15) 6.2 ppb (6) 16.2 ppb (15) 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) 0.29 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
Sept. 14, 2019, 1 p.m. 26.2 ppb (24) 11.2 ppb (10) 26.8 ppb (25) 15.0 ppb (14) N/A 0.0 ppb (0) 13.0 ppb (10) 0.33 ppb (4) N/A 7.5 μg/m3 (31) 31.0
 
Sept. 14, 2019, noon 27.9 ppb (26) 12.3 ppb (11) 29.3 ppb (27) 16.0 ppb (15) N/A 0.0 ppb (0) 5.0 ppb (4) 0.42 ppb (5) N/A 5.7 μg/m3 (24) 27.0
 
Sept. 14, 2019, 11 a.m. 17.2 ppb (16) 1.1 ppb (1) 17.6 ppb (16) 16.0 ppb (15) N/A N/A 4.0 ppb (3) 0.34 ppb (4) N/A 4.8 μg/m3 (20) 20.0
 
Sept. 14, 2019, 10 a.m. 11.7 ppb (11) 0.9 ppb (1) 11.1 ppb (10) 11.0 ppb (10) N/A N/A 9.0 ppb (7) 0.35 ppb (4) N/A 3.7 μg/m3 (15) 15.0
 
Sept. 14, 2019, 9 a.m. 11.6 ppb (11) 0.4 ppb (0) 12.1 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 11.0 ppb (8) 0.4 ppb (4) N/A 7.6 μg/m3 (32) 32.0
 
Sept. 14, 2019, 8 a.m. 8.7 ppb (8) 1.1 ppb (1) 7.7 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.37 ppb (4) N/A 3.1 μg/m3 (13) 13.0
 
Sept. 14, 2019, 7 a.m. 12.6 ppb (12) 0.3 ppb (0) 12.0 ppb (11) 13.0 ppb (12) N/A 0.0 ppb (0) 13.0 ppb (10) 0.3 ppb (3) N/A 1.8 μg/m3 (8) 12.0
 
Sept. 14, 2019, 6 a.m. 11.0 ppb (10) 0.4 ppb (0) 10.9 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 15.0 ppb (12) 0.3 ppb (3) N/A 1.3 μg/m3 (5) 12.0
 
Sept. 14, 2019, 5 a.m. 10.1 ppb (9) 0.3 ppb (0) 9.9 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 17.0 ppb (13) 0.31 ppb (3) N/A 2.6 μg/m3 (11) 13.0
 
Sept. 14, 2019, 4 a.m. 9.9 ppb (9) 0.4 ppb (0) 9.8 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 17.0 ppb (13) 0.33 ppb (4) N/A 2.7 μg/m3 (11) 13.0
 
Sept. 14, 2019, 3 a.m. 14.3 ppb (13) 1.5 ppb (1) 12.9 ppb (12) 13.0 ppb (12) N/A 0.0 ppb (0) 16.0 ppb (12) 0.32 ppb (4) N/A 3.1 μg/m3 (13) 13.0
 
Sept. 14, 2019, 2 a.m. 6.7 ppb (6) 0.3 ppb (0) 6.6 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) N/A 2.8 μg/m3 (12) 18.0
 
Sept. 14, 2019, 1 a.m. 4.3 ppb (4) 0.3 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.22 ppb (2) N/A 0.8 μg/m3 (3) 22.0
 
Sept. 14, 2019, midnight 7.9 ppb (7) 0.2 ppb (0) 7.8 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) 0.25 ppb (3) N/A 3.2 μg/m3 (13) 22.0
 
Sept. 13, 2019, 11 p.m. 4.0 ppb (4) 0.3 ppb (0) 4.4 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.23 ppb (3) N/A -0.7 μg/m3 (0) 28.0
 
Sept. 13, 2019, 10 p.m. 2.0 ppb (2) 0.4 ppb (0) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.2 ppb (2) N/A 5.1 μg/m3 (21) 29.0
 
Sept. 13, 2019, 9 p.m. 2.0 ppb (2) 0.5 ppb (0) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.21 ppb (2) N/A 3.5 μg/m3 (15) 30.0
 
Sept. 13, 2019, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.5 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 31.0
 
Sept. 13, 2019, 7 p.m. 4.6 ppb (4) 1.4 ppb (1) 4.5 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 29.0
 
Sept. 13, 2019, 6 p.m. 5.9 ppb (5) 1.9 ppb (2) 5.8 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.2 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
Sept. 13, 2019, 5 p.m. 2.2 ppb (2) 0.4 ppb (0) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.2 ppb (2) N/A 1.9 μg/m3 (8) 27.0
 
Sept. 13, 2019, 4 p.m. 4.3 ppb (4) 1.1 ppb (1) 4.9 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Sept. 13, 2019, 3 p.m. 4.4 ppb (4) 1.0 ppb (1) 4.2 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.2 ppb (2) N/A 3.8 μg/m3 (16) 22.0
 
Sept. 13, 2019, 2 p.m. 5.3 ppb (5) 1.6 ppb (1) 5.4 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.21 ppb (2) N/A 7.5 μg/m3 (31) 31.0
 
Sept. 13, 2019, 1 p.m. 9.8 ppb (9) 3.4 ppb (3) 7.3 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.25 ppb (3) N/A 8.4 μg/m3 (35) 35.0
 
Sept. 13, 2019, noon 6.0 ppb (6) 1.8 ppb (2) 5.2 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 6.3 μg/m3 (26) 26.0
 
Sept. 13, 2019, 11 a.m. 2.9 ppb (3) 0.7 ppb (1) 2.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 13, 2019, 10 a.m. 3.3 ppb (3) 0.3 ppb (0) 3.6 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 27.0 ppb (21) N/A N/A 14.8 μg/m3 (56) 56.0
 
Sept. 13, 2019, 9 a.m. 5.0 ppb (5) 0.3 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.22 ppb (2) N/A 14.8 μg/m3 (56) 56.0
 
Sept. 13, 2019, 8 a.m. 7.5 ppb (7) 0.3 ppb (0) 7.7 ppb (7) 8.0 ppb (7) N/A 1.0 ppb (1) 25.0 ppb (19) 0.23 ppb (3) N/A 14.6 μg/m3 (56) 56.0
 
Sept. 13, 2019, 7 a.m. 8.4 ppb (8) 0.3 ppb (0) 8.6 ppb (8) 8.0 ppb (7) N/A 1.0 ppb (1) 25.0 ppb (19) 0.23 ppb (3) N/A 12.9 μg/m3 (52) 52.0
 
Sept. 13, 2019, 6 a.m. 8.7 ppb (8) 0.3 ppb (0) 9.0 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 26.0 ppb (20) 0.22 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 13, 2019, 5 a.m. 9.2 ppb (9) 0.3 ppb (0) 9.4 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 27.0 ppb (21) 0.22 ppb (2) N/A 10.5 μg/m3 (44) 44.0
 
Sept. 13, 2019, 4 a.m. 10.6 ppb (10) 0.4 ppb (0) 10.4 ppb (10) 11.0 ppb (10) N/A 1.0 ppb (1) 24.0 ppb (18) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2019, 3 a.m. 12.4 ppb (11) 0.5 ppb (0) 12.1 ppb (11) 12.0 ppb (11) N/A 1.0 ppb (1) 22.0 ppb (17) 0.25 ppb (3) N/A 12.7 μg/m3 (51) 51.0
 
Sept. 13, 2019, 2 a.m. 10.3 ppb (10) 0.3 ppb (0) 10.4 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 24.0 ppb (18) 0.26 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
Sept. 13, 2019, 1 a.m. 12.3 ppb (11) 0.3 ppb (0) 12.1 ppb (11) 12.0 ppb (11) N/A 1.0 ppb (1) 25.0 ppb (19) 0.28 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Sept. 13, 2019, midnight 6.4 ppb (6) 0.5 ppb (0) 6.6 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.27 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
Sept. 12, 2019, 11 p.m. 2.7 ppb (3) 0.2 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Sept. 12, 2019, 10 p.m. 3.2 ppb (3) 0.4 ppb (0) 4.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) 0.24 ppb (3) N/A 10.5 μg/m3 (44) 44.0
 
Sept. 12, 2019, 9 p.m. 3.2 ppb (3) 0.5 ppb (0) 4.9 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) 0.25 ppb (3) N/A 9.5 μg/m3 (40) 40.0
 
Sept. 12, 2019, 8 p.m. 3.7 ppb (3) 1.2 ppb (1) 5.8 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 33.0
 
Sept. 12, 2019, 7 p.m. 2.3 ppb (2) 0.4 ppb (0) 3.9 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.23 ppb (3) N/A 8.7 μg/m3 (36) 37.0
 
Sept. 12, 2019, 6 p.m. 2.9 ppb (3) 0.5 ppb (0) 4.3 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 12, 2019, 5 p.m. 3.7 ppb (3) 0.8 ppb (1) 5.6 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 52.0 ppb (40) 0.26 ppb (3) N/A 15.7 μg/m3 (58) 58.0
 
Sept. 12, 2019, 4 p.m. 3.8 ppb (4) 0.8 ppb (1) 6.1 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.3 ppb (3) N/A 14.8 μg/m3 (56) 56.0
 
Sept. 12, 2019, 3 p.m. 6.3 ppb (6) 1.3 ppb (1) 8.3 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 44.0 ppb (34) 0.31 ppb (3) N/A 18.4 μg/m3 (64) 64.0
 
Sept. 12, 2019, 2 p.m. 10.9 ppb (10) 2.5 ppb (2) 11.9 ppb (11) 9.0 ppb (8) N/A 1.0 ppb (1) 34.0 ppb (26) 0.33 ppb (4) N/A 19.3 μg/m3 (66) 66.0
 
Sept. 12, 2019, 1 p.m. 14.2 ppb (13) 2.8 ppb (3) 15.3 ppb (14) 12.0 ppb (11) N/A 1.0 ppb (1) 29.0 ppb (22) 0.34 ppb (4) N/A 19.2 μg/m3 (65) 65.0
 
Sept. 12, 2019, noon 23.6 ppb (22) 3.7 ppb (3) 22.5 ppb (21) 20.0 ppb (19) N/A 1.0 ppb (1) 17.0 ppb (13) 0.37 ppb (4) N/A 16.4 μg/m3 (59) 59.0
 
Sept. 12, 2019, 11 a.m. 16.2 ppb (15) 0.6 ppb (1) 16.1 ppb (15) 16.0 ppb (15) N/A N/A 18.0 ppb (14) 0.34 ppb (4) N/A 15.2 μg/m3 (57) 57.0
 
Sept. 12, 2019, 10 a.m. 15.3 ppb (14) 0.7 ppb (1) 14.6 ppb (14) 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.29 ppb (3) N/A 17.3 μg/m3 (61) 61.0
 
Sept. 12, 2019, 9 a.m. 15.2 ppb (14) 0.7 ppb (1) 14.4 ppb (13) 15.0 ppb (14) N/A 0.0 ppb (0) 20.0 ppb (15) 0.29 ppb (3) N/A 14.2 μg/m3 (55) 55.0
 
Sept. 12, 2019, 8 a.m. 3.9 ppb (4) 0.3 ppb (0) 4.6 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.26 ppb (3) N/A 16.3 μg/m3 (59) 59.0
 
Sept. 12, 2019, 7 a.m. 5.9 ppb (5) 0.3 ppb (0) 6.4 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.27 ppb (3) N/A 14.5 μg/m3 (55) 55.0
 
Sept. 12, 2019, 6 a.m. 5.1 ppb (5) 0.3 ppb (0) 5.7 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (24) 0.27 ppb (3) N/A 13.3 μg/m3 (53) 53.0
 
Sept. 12, 2019, 5 a.m. 6.3 ppb (6) 0.3 ppb (0) 6.7 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.26 ppb (3) N/A 9.3 μg/m3 (39) 39.0
 
Sept. 12, 2019, 4 a.m. 10.2 ppb (9) 0.4 ppb (0) 10.2 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 26.0 ppb (20) 0.27 ppb (3) N/A 11.5 μg/m3 (48) 48.0
 
Sept. 12, 2019, 3 a.m. 7.5 ppb (7) 0.3 ppb (0) 7.8 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) 0.28 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
Sept. 12, 2019, 2 a.m. 17.4 ppb (16) 0.8 ppb (1) 16.5 ppb (15) 17.0 ppb (16) N/A 0.0 ppb (0) 23.0 ppb (18) 0.33 ppb (4) N/A 14.4 μg/m3 (55) 55.0
 
Sept. 12, 2019, 1 a.m. 12.1 ppb (11) 0.3 ppb (0) 12.3 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (22) 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 12, 2019, midnight 6.7 ppb (6) 0.3 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 0.31 ppb (3) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 11, 2019, 11 p.m. 3.7 ppb (3) 0.4 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (34) 0.3 ppb (3) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 11, 2019, 10 p.m. 2.1 ppb (2) 0.3 ppb (0) 3.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.29 ppb (3) N/A 13.4 μg/m3 (53) 53.0
 
Sept. 11, 2019, 9 p.m. 4.3 ppb (4) 0.6 ppb (1) 5.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.29 ppb (3) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 11, 2019, 8 p.m. 2.9 ppb (3) 0.6 ppb (1) 4.7 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.3 ppb (3) N/A 15.4 μg/m3 (57) 57.0
 
Sept. 11, 2019, 7 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.32 ppb (4) N/A 13.5 μg/m3 (53) 53.0
 
Sept. 11, 2019, 6 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (42) 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 11, 2019, 5 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (42) 0.3 ppb (3) N/A 15.6 μg/m3 (58) 58.0
 
Sept. 11, 2019, 4 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 52.0 ppb (40) 0.31 ppb (3) N/A 15.7 μg/m3 (58) 58.0
 
Sept. 11, 2019, 3 p.m. 5.7 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) 0.32 ppb (4) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 11, 2019, 2 p.m. 7.3 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.32 ppb (4) N/A 16.9 μg/m3 (60) 60.0
 
Sept. 11, 2019, 1 p.m. 14.3 ppb (13) 2.8 ppb (3) 14.5 ppb (13) 12.0 ppb (11) N/A 1.0 ppb (1) 31.0 ppb (24) 0.33 ppb (4) N/A 17.1 μg/m3 (61) 61.0
 
Sept. 11, 2019, noon 17.8 ppb (16) 1.6 ppb (1) 16.8 ppb (16) 16.0 ppb (15) N/A 1.0 ppb (1) 23.0 ppb (18) 0.35 ppb (4) N/A 16.9 μg/m3 (60) 60.0
 
Sept. 11, 2019, 11 a.m. 19.9 ppb (18) 0.5 ppb (0) 18.5 ppb (17) 20.0 ppb (19) N/A 1.0 ppb (1) 16.0 ppb (12) N/A N/A 15.5 μg/m3 (57) 57.0
 
Sept. 11, 2019, 10 a.m. 12.6 ppb (12) 0.3 ppb (0) 12.0 ppb (11) 13.0 ppb (12) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 14.6 μg/m3 (56) 56.0
 
Sept. 11, 2019, 9 a.m. 12.3 ppb (11) 0.3 ppb (0) 11.7 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
Sept. 11, 2019, 8 a.m. 7.4 ppb (7) 0.4 ppb (0) 7.2 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.26 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
Sept. 11, 2019, 7 a.m. 4.7 ppb (4) 0.2 ppb (0) 5.1 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.28 ppb (3) N/A 12.2 μg/m3 (50) 50.0
 
Sept. 11, 2019, 6 a.m. 6.3 ppb (6) 0.4 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.26 ppb (3) N/A 9.3 μg/m3 (39) 39.0
 
Sept. 11, 2019, 5 a.m. 4.5 ppb (4) 0.2 ppb (0) 4.7 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) 0.24 ppb (3) N/A 9.9 μg/m3 (41) 41.0
 
Sept. 11, 2019, 4 a.m. 5.0 ppb (5) 0.3 ppb (0) 5.2 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (17) 0.24 ppb (3) N/A 9.5 μg/m3 (40) 40.0
 
Sept. 11, 2019, 3 a.m. 6.6 ppb (6) 0.3 ppb (0) 6.7 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) 0.26 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Sept. 11, 2019, 2 a.m. 8.4 ppb (8) 0.3 ppb (0) 8.2 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (20) 0.27 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Sept. 11, 2019, 1 a.m. 14.6 ppb (14) 0.5 ppb (0) 13.6 ppb (13) 14.0 ppb (13) N/A 0.0 ppb (0) 22.0 ppb (17) 0.3 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
Sept. 11, 2019, midnight 6.9 ppb (6) 0.2 ppb (0) 7.2 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.28 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
Sept. 10, 2019, 11 p.m. 4.6 ppb (4) 0.3 ppb (0) 5.1 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (28) 0.29 ppb (3) N/A 10.5 μg/m3 (44) 44.0
 
Sept. 10, 2019, 10 p.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.23 ppb (3) N/A 12.8 μg/m3 (52) 52.0
 
Sept. 10, 2019, 9 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 8.9 μg/m3 (37) 37.0
 
Sept. 10, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 14.3 μg/m3 (55) 55.0
 
Sept. 10, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 10.6 μg/m3 (44) 44.0
 
Sept. 10, 2019, 6 p.m. 2.8 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 52.0 ppb (40) N/A N/A 8.3 μg/m3 (35) 40.0
 
Sept. 10, 2019, 5 p.m. 4.8 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.31 ppb (3) N/A 11.5 μg/m3 (48) 48.0
 
Sept. 10, 2019, 4 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.3 ppb (3) N/A 13.5 μg/m3 (53) 53.0
 
Sept. 10, 2019, 3 p.m. 7.1 ppb (7) 1.4 ppb (1) 8.8 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 44.0 ppb (34) 0.33 ppb (4) N/A 12.8 μg/m3 (52) 52.0
 
Sept. 10, 2019, 2 p.m. 16.2 ppb (15) 4.2 ppb (4) 17.9 ppb (17) 12.0 ppb (11) N/A 1.0 ppb (1) 31.0 ppb (24) 0.37 ppb (4) N/A 17.4 μg/m3 (61) 61.0
 
Sept. 10, 2019, 1 p.m. 19.6 ppb (18) 4.6 ppb (4) 20.4 ppb (19) 15.0 ppb (14) N/A 1.0 ppb (1) 23.0 ppb (18) 0.39 ppb (4) N/A 17.2 μg/m3 (61) 61.0
 
Sept. 10, 2019, noon 22.6 ppb (21) 3.1 ppb (3) 22.6 ppb (21) 20.0 ppb (19) N/A 1.0 ppb (1) 18.0 ppb (14) 0.41 ppb (5) N/A 17.7 μg/m3 (62) 62.0
 
Sept. 10, 2019, 11 a.m. 15.9 ppb (15) 0.7 ppb (1) 16.3 ppb (15) 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.35 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 10, 2019, 10 a.m. 12.3 ppb (11) 0.9 ppb (1) 12.7 ppb (12) 12.0 ppb (11) N/A N/A 25.0 ppb (19) 0.32 ppb (4) N/A 17.3 μg/m3 (61) 61.0
 
Sept. 10, 2019, 9 a.m. 8.3 ppb (8) 0.3 ppb (0) 9.5 ppb (9) 8.0 ppb (7) N/A 1.0 ppb (1) 31.0 ppb (24) 0.3 ppb (3) N/A 11.6 μg/m3 (48) 48.0
 
Sept. 10, 2019, 8 a.m. 9.2 ppb (9) 0.3 ppb (0) 10.1 ppb (9) 9.0 ppb (8) N/A 1.0 ppb (1) 33.0 ppb (25) 0.31 ppb (3) N/A 14.9 μg/m3 (56) 56.0
 
Sept. 10, 2019, 7 a.m. 11.8 ppb (11) 0.3 ppb (0) 12.7 ppb (12) 12.0 ppb (11) N/A 1.0 ppb (1) 32.0 ppb (25) 0.3 ppb (3) N/A 14.7 μg/m3 (56) 56.0
 
Sept. 10, 2019, 6 a.m. 10.5 ppb (10) 0.3 ppb (0) 11.3 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 35.0 ppb (27) 0.29 ppb (3) N/A 13.5 μg/m3 (53) 53.0
 
Sept. 10, 2019, 5 a.m. 10.9 ppb (10) 0.3 ppb (0) 11.9 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 38.0 ppb (29) 0.29 ppb (3) N/A 11.3 μg/m3 (47) 47.0
 
Sept. 10, 2019, 4 a.m. 14.1 ppb (13) 0.3 ppb (0) 14.8 ppb (14) 14.0 ppb (13) N/A 0.0 ppb (0) 35.0 ppb (27) 0.29 ppb (3) N/A 10.4 μg/m3 (43) 43.0
 
Sept. 10, 2019, 3 a.m. 6.1 ppb (6) 0.3 ppb (0) 7.5 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.3 ppb (3) N/A 12.7 μg/m3 (51) 51.0
 
Sept. 10, 2019, 2 a.m. 5.9 ppb (5) 0.3 ppb (0) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) 0.32 ppb (4) N/A 14.6 μg/m3 (56) 56.0
 
Sept. 10, 2019, 1 a.m. 10.4 ppb (10) 0.4 ppb (0) 10.3 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 47.0 ppb (36) 0.33 ppb (4) N/A 14.9 μg/m3 (56) 56.0
 
Sept. 10, 2019, midnight 14.5 ppb (13) 0.3 ppb (0) 15.2 ppb (14) 14.0 ppb (13) N/A 0.0 ppb (0) 40.0 ppb (31) 0.36 ppb (4) N/A 12.7 μg/m3 (51) 51.0
 
Sept. 9, 2019, 11 p.m. 9.1 ppb (8) 0.5 ppb (0) 10.3 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 46.0 ppb (35) 0.36 ppb (4) N/A 12.5 μg/m3 (51) 51.0
 
Sept. 9, 2019, 10 p.m. 7.8 ppb (7) 0.7 ppb (1) 9.5 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 52.0 ppb (40) 0.37 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 9, 2019, 9 p.m. 6.2 ppb (6) 0.8 ppb (1) 8.4 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 58.0 ppb (45) 0.35 ppb (4) N/A 13.9 μg/m3 (54) 54.0
 
Sept. 9, 2019, 8 p.m. 5.6 ppb (5) 0.8 ppb (1) 8.2 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 61.0 ppb (47) 0.35 ppb (4) N/A 13.7 μg/m3 (54) 54.0
 
Sept. 9, 2019, 7 p.m. 3.8 ppb (4) 0.4 ppb (0) 7.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (3) 64.0 ppb (49) 0.33 ppb (4) N/A 17.1 μg/m3 (61) 61.0
 
Sept. 9, 2019, 6 p.m. 4.3 ppb (4) 1.0 ppb (1) 7.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 54.0 ppb (42) 0.31 ppb (3) N/A 13.2 μg/m3 (53) 53.0
 
Sept. 9, 2019, 5 p.m. 6.2 ppb (6) 1.5 ppb (1) 8.4 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 43.0 ppb (33) 0.28 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
Sept. 9, 2019, 4 p.m. 8.5 ppb (8) 2.9 ppb (3) 10.0 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.28 ppb (3) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 9, 2019, 3 p.m. 8.8 ppb (8) 2.6 ppb (2) 10.6 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 33.0 ppb (25) 0.27 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
Sept. 9, 2019, 2 p.m. 16.4 ppb (15) 5.7 ppb (5) 17.8 ppb (16) 11.0 ppb (10) N/A 1.0 ppb (1) 23.0 ppb (18) 0.3 ppb (3) N/A 8.4 μg/m3 (35) 35.0
 
Sept. 9, 2019, 1 p.m. 15.6 ppb (14) 5.7 ppb (5) 16.5 ppb (15) 10.0 ppb (9) N/A 1.0 ppb (1) 17.0 ppb (13) 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 9, 2019, noon 18.5 ppb (17) 4.8 ppb (4) 18.5 ppb (17) 14.0 ppb (13) N/A 1.0 ppb (1) 12.0 ppb (9) 0.35 ppb (4) N/A 10.8 μg/m3 (45) 45.0
 
Sept. 9, 2019, 11 a.m. 25.1 ppb (23) 4.7 ppb (4) 25.0 ppb (23) 21.0 ppb (19) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 13.3 μg/m3 (53) 53.0
 
Sept. 9, 2019, 10 a.m. 22.7 ppb (21) 2.7 ppb (3) 22.5 ppb (21) 20.0 ppb (19) N/A 0.0 ppb (0) 7.0 ppb (5) N/A N/A 9.3 μg/m3 (39) 39.0
 
Sept. 9, 2019, 9 a.m. 20.3 ppb (19) 1.0 ppb (1) 20.1 ppb (19) 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (6) 0.25 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Sept. 9, 2019, 8 a.m. 11.8 ppb (11) 0.4 ppb (0) 12.2 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 14.0 ppb (11) 0.26 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
Sept. 9, 2019, 7 a.m. 11.3 ppb (10) 0.9 ppb (1) 11.3 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 14.0 ppb (11) 0.26 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Sept. 9, 2019, 6 a.m. 11.2 ppb (10) 0.8 ppb (1) 11.2 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 16.0 ppb (12) 0.28 ppb (3) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 9, 2019, 5 a.m. 10.3 ppb (10) 0.5 ppb (0) 10.4 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 18.0 ppb (14) 0.29 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
Sept. 9, 2019, 4 a.m. 14.8 ppb (14) 1.0 ppb (1) 14.9 ppb (14) 14.0 ppb (13) N/A 0.0 ppb (0) 15.0 ppb (12) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 9, 2019, 3 a.m. 12.8 ppb (12) 1.0 ppb (1) 12.7 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 18.0 ppb (14) 0.32 ppb (4) N/A 8.2 μg/m3 (34) 34.0
 
Sept. 9, 2019, 2 a.m. 12.0 ppb (11) 1.1 ppb (1) 11.8 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 20.0 ppb (15) 0.33 ppb (4) N/A 11.9 μg/m3 (50) 50.0
 
Sept. 9, 2019, 1 a.m. 13.8 ppb (13) 1.2 ppb (1) 13.3 ppb (12) 13.0 ppb (12) N/A 0.0 ppb (0) 21.0 ppb (16) 0.33 ppb (4) N/A 8.9 μg/m3 (37) 37.0
 
Sept. 9, 2019, midnight 13.4 ppb (12) 1.1 ppb (1) 13.4 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 24.0 ppb (18) 0.33 ppb (4) N/A 7.8 μg/m3 (32) 32.0
 
Sept. 8, 2019, 11 p.m. 8.9 ppb (8) 0.8 ppb (1) 9.7 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (26) 0.31 ppb (3) N/A 7.8 μg/m3 (32) 32.0
 
Sept. 8, 2019, 10 p.m. 7.0 ppb (6) 1.0 ppb (1) 8.4 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.28 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
Sept. 8, 2019, 9 p.m. 5.9 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 43.0 ppb (33) 0.26 ppb (3) N/A 5.7 μg/m3 (24) 33.0
 
Sept. 8, 2019, 8 p.m. 5.8 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 44.0 ppb (34) 0.25 ppb (3) N/A 8.2 μg/m3 (34) 34.0
 
Sept. 8, 2019, 7 p.m. 4.3 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 39.0 ppb (30) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Sept. 8, 2019, 6 p.m. 5.0 ppb (5) 1.4 ppb (1) 6.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) 0.23 ppb (3) N/A 12.5 μg/m3 (51) 51.0
 
Sept. 8, 2019, 5 p.m. 6.8 ppb (6) 1.7 ppb (2) 7.4 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) 0.23 ppb (3) N/A 7.7 μg/m3 (32) 32.0
 
Sept. 8, 2019, 4 p.m. 8.8 ppb (8) 0.8 ppb (1) 8.7 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (15) 0.23 ppb (3) N/A -1.2 μg/m3 (0) 15.0
 
Sept. 8, 2019, 3 p.m. 6.8 ppb (6) 0.5 ppb (0) 6.7 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.23 ppb (3) N/A 5.8 μg/m3 (24) 24.0
 
Sept. 8, 2019, 2 p.m. 10.9 ppb (10) 0.9 ppb (1) 11.0 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) 0.24 ppb (3) N/A 4.4 μg/m3 (18) 18.0
 
Sept. 8, 2019, 1 p.m. 10.7 ppb (10) 0.7 ppb (1) 10.2 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 18.0 ppb (14) 0.26 ppb (3) N/A 7.3 μg/m3 (30) 30.0
 
Sept. 8, 2019, noon 14.2 ppb (13) 1.4 ppb (1) 14.1 ppb (13) 13.0 ppb (12) N/A 1.0 ppb (1) 17.0 ppb (13) 0.26 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Sept. 8, 2019, 11 a.m. 6.9 ppb (6) 0.3 ppb (0) 7.2 ppb (7) 7.0 ppb (6) N/A N/A 23.0 ppb (18) 0.23 ppb (3) N/A 2.9 μg/m3 (12) 18.0
 
Sept. 8, 2019, 10 a.m. 3.9 ppb (4) 0.3 ppb (0) 4.2 ppb (4) 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.22 ppb (2) N/A 3.9 μg/m3 (16) 20.0
 
Sept. 8, 2019, 9 a.m. 7.2 ppb (7) 0.3 ppb (0) 7.4 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) 0.24 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 8, 2019, 8 a.m. 10.7 ppb (10) 0.4 ppb (0) 10.7 ppb (10) 11.0 ppb (10) N/A 1.0 ppb (1) 22.0 ppb (17) 0.26 ppb (3) N/A 4.3 μg/m3 (18) 18.0
 
Sept. 8, 2019, 7 a.m. 9.2 ppb (9) 0.3 ppb (0) 9.2 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (17) 0.29 ppb (3) N/A 5.3 μg/m3 (22) 22.0
 
Sept. 8, 2019, 6 a.m. 9.3 ppb (9) 0.4 ppb (0) 9.2 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 21.0 ppb (16) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0