AQSQID: 295100085

Site Name: Blair Street

Location: Saint Louis (Hyde Park), MO

Reporting: True, Located: True

Current AQI: 51.0

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
Jan. 25, 2020, 5 a.m. 8.1 ppb (8) 0.8 ppb (1) 10.2 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (12) 0.28 ppb (3) N/A 12.3 μg/m3 (51) 51.0
 
Jan. 25, 2020, 4 a.m. 8.0 ppb (7) 0.5 ppb (0) 9.5 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.28 ppb (3) N/A 10.6 μg/m3 (44) 44.0
 
Jan. 25, 2020, 3 a.m. 7.1 ppb (7) 0.2 ppb (0) 8.6 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (12) 0.27 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
Jan. 25, 2020, 2 a.m. 7.7 ppb (7) 0.3 ppb (0) 8.7 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (11) 0.28 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
Jan. 25, 2020, 1 a.m. 8.6 ppb (8) 0.5 ppb (0) 9.2 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.28 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
Jan. 25, 2020, midnight 8.5 ppb (8) 0.6 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.28 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 24, 2020, 11 p.m. 10.6 ppb (10) 0.8 ppb (1) 10.6 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (12) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, 10 p.m. 12.7 ppb (12) 2.8 ppb (3) 11.7 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (12) 0.32 ppb (4) N/A 9.8 μg/m3 (41) 41.0
 
Jan. 24, 2020, 9 p.m. 17.0 ppb (16) 6.0 ppb (6) 14.0 ppb (13) 11.0 ppb (10) N/A 0.0 ppb (0) 9.0 ppb (7) 0.34 ppb (4) N/A 9.3 μg/m3 (39) 39.0
 
Jan. 24, 2020, 8 p.m. 13.4 ppb (12) 3.8 ppb (4) 11.6 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 11.0 ppb (8) 0.33 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
Jan. 24, 2020, 7 p.m. 16.6 ppb (15) 8.8 ppb (8) 13.9 ppb (13) 8.0 ppb (7) N/A 0.0 ppb (0) 13.0 ppb (10) 0.32 ppb (4) N/A 12.8 μg/m3 (52) 52.0
 
Jan. 24, 2020, 6 p.m. 16.0 ppb (15) 7.5 ppb (7) 15.3 ppb (14) 9.0 ppb (8) N/A 0.0 ppb (0) 10.0 ppb (8) 0.34 ppb (4) N/A 5.6 μg/m3 (23) 23.0
 
Jan. 24, 2020, 5 p.m. 19.8 ppb (18) 8.0 ppb (7) 18.9 ppb (18) 12.0 ppb (11) N/A 0.0 ppb (0) 8.0 ppb (6) 0.34 ppb (4) N/A 10.7 μg/m3 (45) 45.0
 
Jan. 24, 2020, 4 p.m. 22.1 ppb (20) 9.0 ppb (8) 22.1 ppb (20) 13.0 ppb (12) N/A 0.0 ppb (0) 8.0 ppb (6) 0.36 ppb (4) N/A 8.8 μg/m3 (37) 37.0
 
Jan. 24, 2020, 3 p.m. 24.7 ppb (23) 8.5 ppb (8) 24.5 ppb (23) 16.0 ppb (15) N/A 0.0 ppb (0) 5.0 ppb (4) 0.34 ppb (4) N/A 10.9 μg/m3 (45) 45.0
 
Jan. 24, 2020, 2 p.m. 28.4 ppb (26) 8.9 ppb (8) 27.6 ppb (26) 20.0 ppb (19) N/A 0.0 ppb (0) 3.0 ppb (2) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 24, 2020, 1 p.m. 40.6 ppb (38) 17.0 ppb (16) 38.8 ppb (36) 24.0 ppb (22) N/A 0.0 ppb (0) 1.0 ppb (1) 0.39 ppb (4) N/A 9.4 μg/m3 (39) 39.0
 
Jan. 24, 2020, noon 49.0 ppb (45) 22.9 ppb (21) 45.9 ppb (42) 26.0 ppb (24) N/A 0.0 ppb (0) 1.0 ppb (1) 0.36 ppb (4) N/A 12.4 μg/m3 (51) 51.0
 
Jan. 24, 2020, 11 a.m. 23.5 ppb (22) 1.6 ppb (1) 23.1 ppb (21) 22.0 ppb (20) N/A 0.0 ppb (0) 3.0 ppb (2) 0.27 ppb (3) N/A 12.3 μg/m3 (51) 51.0
 
Jan. 24, 2020, 10 a.m. 22.0 ppb (20) 1.0 ppb (1) 21.5 ppb (20) 21.0 ppb (19) N/A 0.0 ppb (0) 5.0 ppb (4) 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 24, 2020, 9 a.m. 18.5 ppb (17) 0.5 ppb (0) 18.0 ppb (17) 18.0 ppb (17) N/A 0.0 ppb (0) 7.0 ppb (5) 0.28 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
Jan. 24, 2020, 8 a.m. 19.9 ppb (18) 0.4 ppb (0) 19.5 ppb (18) 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (6) 0.28 ppb (3) N/A 12.3 μg/m3 (51) 51.0
 
Jan. 24, 2020, 7 a.m. 18.4 ppb (17) 0.4 ppb (0) 17.5 ppb (16) 18.0 ppb (17) N/A 0.0 ppb (0) 10.0 ppb (8) 0.27 ppb (3) N/A 10.6 μg/m3 (44) 44.0
 
Jan. 24, 2020, 6 a.m. 32.3 ppb (30) 4.2 ppb (4) 29.7 ppb (28) 28.0 ppb (26) N/A 0.0 ppb (0) 4.0 ppb (3) 0.31 ppb (3) N/A 11.1 μg/m3 (46) 46.0
 
Jan. 24, 2020, 5 a.m. 44.9 ppb (42) 12.7 ppb (12) 42.4 ppb (39) 32.0 ppb (30) N/A 0.0 ppb (0) 2.0 ppb (2) 0.37 ppb (4) N/A 10.6 μg/m3 (44) 44.0
 
Jan. 24, 2020, 4 a.m. 57.7 ppb (54) 22.2 ppb (21) 54.8 ppb (51) 36.0 ppb (33) N/A 0.0 ppb (0) 1.0 ppb (1) 0.36 ppb (4) N/A 10.5 μg/m3 (44) 54.0
 
Jan. 24, 2020, 3 a.m. 57.1 ppb (53) 20.6 ppb (19) 52.9 ppb (49) 37.0 ppb (34) N/A 0.0 ppb (0) 1.0 ppb (1) 0.36 ppb (4) N/A 11.3 μg/m3 (47) 53.0
 
Jan. 24, 2020, 2 a.m. 48.0 ppb (44) 13.0 ppb (12) 44.0 ppb (41) 35.0 ppb (32) N/A 0.0 ppb (0) 2.0 ppb (2) 0.37 ppb (4) N/A 9.4 μg/m3 (39) 44.0
 
Jan. 24, 2020, 1 a.m. 39.0 ppb (36) 8.4 ppb (8) 36.1 ppb (33) 31.0 ppb (29) N/A 0.0 ppb (0) 5.0 ppb (4) 0.36 ppb (4) N/A 10.8 μg/m3 (45) 45.0
 
Jan. 24, 2020, midnight 42.0 ppb (39) 10.3 ppb (10) 39.9 ppb (37) 32.0 ppb (30) N/A 0.0 ppb (0) 4.0 ppb (3) 0.35 ppb (4) N/A 12.9 μg/m3 (52) 52.0
 
Jan. 23, 2020, 11 p.m. 36.2 ppb (34) 8.3 ppb (8) 32.2 ppb (30) 28.0 ppb (26) N/A 0.0 ppb (0) 6.0 ppb (5) 0.39 ppb (4) N/A 8.6 μg/m3 (36) 36.0
 
Jan. 23, 2020, 10 p.m. 30.8 ppb (29) 5.9 ppb (5) 29.5 ppb (27) 25.0 ppb (23) N/A 0.0 ppb (0) 9.0 ppb (7) 0.35 ppb (4) N/A 14.7 μg/m3 (56) 56.0
 
Jan. 23, 2020, 9 p.m. 52.5 ppb (49) 19.4 ppb (18) 46.8 ppb (43) 33.0 ppb (31) N/A 0.0 ppb (0) 6.0 ppb (5) 0.43 ppb (5) N/A 12.9 μg/m3 (52) 52.0
 
Jan. 23, 2020, 8 p.m. 22.0 ppb (20) 5.4 ppb (5) 22.1 ppb (20) 17.0 ppb (16) N/A 0.0 ppb (0) 15.0 ppb (12) 0.42 ppb (5) N/A 8.9 μg/m3 (37) 37.0
 
Jan. 23, 2020, 7 p.m. 27.4 ppb (25) 8.7 ppb (8) 26.7 ppb (25) 19.0 ppb (18) N/A N/A 13.0 ppb (10) N/A N/A 12.2 μg/m3 (50) 50.0
 
Jan. 23, 2020, 6 p.m. 26.3 ppb (24) 9.0 ppb (8) 25.7 ppb (24) 17.0 ppb (16) N/A N/A 13.0 ppb (10) N/A N/A 11.8 μg/m3 (49) 49.0
 
Jan. 23, 2020, 5 p.m. 16.3 ppb (15) 3.7 ppb (3) 16.4 ppb (15) 13.0 ppb (12) N/A N/A 16.0 ppb (12) 0.04 ppb (0) N/A 12.7 μg/m3 (51) 51.0
 
Jan. 23, 2020, 4 p.m. 19.6 ppb (18) 4.0 ppb (4) 18.8 ppb (17) 16.0 ppb (15) N/A N/A 13.0 ppb (10) 0.03 ppb (0) N/A 11.9 μg/m3 (50) 50.0
 
Jan. 23, 2020, 3 p.m. 20.7 ppb (19) 5.2 ppb (5) 20.1 ppb (19) 16.0 ppb (15) N/A N/A 12.0 ppb (9) 0.03 ppb (0) N/A 11.2 μg/m3 (47) 47.0
 
Jan. 23, 2020, 2 p.m. 24.1 ppb (22) 5.2 ppb (5) 24.8 ppb (23) 19.0 ppb (18) N/A N/A 9.0 ppb (7) 0.05 ppb (1) N/A 10.9 μg/m3 (45) 45.0
 
Jan. 23, 2020, 1 p.m. 23.2 ppb (21) 4.7 ppb (4) 22.7 ppb (21) 19.0 ppb (18) N/A 0.0 ppb (0) 10.0 ppb (8) 0.03 ppb (0) N/A 9.5 μg/m3 (40) 40.0
 
Jan. 23, 2020, noon 13.1 ppb (12) 0.7 ppb (1) 13.4 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 16.0 ppb (12) 0.0 ppb (0) N/A 11.9 μg/m3 (50) 50.0
 
Jan. 23, 2020, 11 a.m. 10.7 ppb (10) 0.3 ppb (0) 11.4 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 19.0 ppb (15) 0.03 ppb (0) N/A 6.6 μg/m3 (28) 28.0
 
Jan. 23, 2020, 10 a.m. 7.4 ppb (7) 0.3 ppb (0) 8.4 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 3.5 μg/m3 (15) 17.0
 
Jan. 23, 2020, 9 a.m. 5.8 ppb (5) 0.2 ppb (0) 6.9 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.01 ppb (0) N/A 13.7 μg/m3 (54) 54.0
 
Jan. 23, 2020, 8 a.m. 9.4 ppb (9) 0.5 ppb (0) 10.0 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 21.0 ppb (16) 0.01 ppb (0) N/A 8.7 μg/m3 (36) 36.0
 
Jan. 23, 2020, 7 a.m. 11.2 ppb (10) 0.2 ppb (0) 11.9 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 19.0 ppb (15) 0.02 ppb (0) N/A 11.1 μg/m3 (46) 46.0
 
Jan. 23, 2020, 6 a.m. 13.1 ppb (12) 0.3 ppb (0) 13.7 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 17.0 ppb (13) 0.02 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2020, 5 a.m. 9.2 ppb (9) 0.3 ppb (0) 10.3 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 10.4 μg/m3 (43) 43.0
 
Jan. 23, 2020, 4 a.m. 7.1 ppb (7) 0.3 ppb (0) 8.4 ppb (8) 7.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 9.4 μg/m3 (39) 39.0
 
Jan. 23, 2020, 3 a.m. 7.4 ppb (7) 0.4 ppb (0) 8.8 ppb (8) 7.0 ppb (6) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 6.6 μg/m3 (28) 28.0
 
Jan. 23, 2020, 2 a.m. 7.1 ppb (7) 0.3 ppb (0) 8.4 ppb (8) 7.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 9.4 μg/m3 (39) 39.0
 
Jan. 23, 2020, 1 a.m. 8.3 ppb (8) 0.2 ppb (0) 9.3 ppb (9) 8.0 ppb (7) N/A 1.0 ppb (1) 23.0 ppb (18) N/A N/A 7.5 μg/m3 (31) 31.0
 
Jan. 23, 2020, midnight 13.8 ppb (13) 0.9 ppb (1) 14.0 ppb (13) 13.0 ppb (12) N/A 1.0 ppb (1) 20.0 ppb (15) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 22, 2020, 11 p.m. 10.3 ppb (10) 0.5 ppb (0) 11.2 ppb (10) 10.0 ppb (9) N/A 1.0 ppb (1) 22.0 ppb (17) 0.2 ppb (2) N/A 9.2 μg/m3 (38) 38.0
 
Jan. 22, 2020, 10 p.m. 11.4 ppb (11) 1.5 ppb (1) 11.6 ppb (11) 10.0 ppb (9) N/A 1.0 ppb (1) 23.0 ppb (18) 0.21 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
Jan. 22, 2020, 9 p.m. 12.6 ppb (12) 3.5 ppb (3) 13.5 ppb (12) 9.0 ppb (8) N/A 1.0 ppb (1) 24.0 ppb (18) 0.19 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
Jan. 22, 2020, 8 p.m. 16.5 ppb (15) 5.0 ppb (5) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 23.0 ppb (18) 0.19 ppb (2) N/A 8.2 μg/m3 (34) 34.0
 
Jan. 22, 2020, 7 p.m. 14.4 ppb (13) 5.4 ppb (5) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 23.0 ppb (18) 0.2 ppb (2) N/A 11.7 μg/m3 (49) 49.0
 
Jan. 22, 2020, 6 p.m. 14.4 ppb (13) 4.8 ppb (4) N/A 10.0 ppb (9) N/A 2.0 ppb (3) 21.0 ppb (16) 0.2 ppb (2) N/A 13.7 μg/m3 (54) 54.0
 
Jan. 22, 2020, 5 p.m. 13.1 ppb (12) 5.6 ppb (5) N/A 8.0 ppb (7) N/A 2.0 ppb (3) 21.0 ppb (16) N/A N/A 13.3 μg/m3 (53) 53.0
 
Jan. 22, 2020, 4 p.m. 15.2 ppb (14) 5.6 ppb (5) N/A 10.0 ppb (9) N/A 2.0 ppb (3) 19.0 ppb (15) N/A N/A 12.6 μg/m3 (51) 51.0
 
Jan. 22, 2020, 3 p.m. 20.7 ppb (19) 6.2 ppb (6) N/A 15.0 ppb (14) N/A 2.0 ppb (3) 14.0 ppb (11) 0.01 ppb (0) N/A 14.3 μg/m3 (55) 55.0
 
Jan. 22, 2020, 2 p.m. 24.9 ppb (23) 9.3 ppb (9) N/A 16.0 ppb (15) N/A 2.0 ppb (3) 12.0 ppb (9) 0.03 ppb (0) N/A 12.1 μg/m3 (50) 50.0
 
Jan. 22, 2020, 1 p.m. 32.8 ppb (30) 10.1 ppb (9) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 7.0 ppb (5) 0.04 ppb (0) N/A 12.7 μg/m3 (51) 51.0
 
Jan. 22, 2020, noon 22.3 ppb (21) 4.0 ppb (4) N/A 18.0 ppb (17) N/A 2.0 ppb (3) 8.0 ppb (6) 0.01 ppb (0) N/A 15.7 μg/m3 (58) 58.0
 
Jan. 22, 2020, 11 a.m. 16.7 ppb (15) 1.1 ppb (1) N/A 16.0 ppb (15) N/A N/A 11.0 ppb (8) 0.21 ppb (2) N/A 13.7 μg/m3 (54) 54.0
 
Jan. 22, 2020, 10 a.m. 14.2 ppb (13) 1.2 ppb (1) N/A 13.0 ppb (12) N/A N/A 13.0 ppb (10) 0.2 ppb (2) N/A 13.8 μg/m3 (54) 54.0
 
Jan. 22, 2020, 9 a.m. 17.4 ppb (16) 0.9 ppb (1) N/A 17.0 ppb (16) N/A 2.0 ppb (3) 11.0 ppb (8) 0.2 ppb (2) N/A 13.9 μg/m3 (54) 54.0
 
Jan. 22, 2020, 8 a.m. 17.0 ppb (16) 0.8 ppb (1) N/A 16.0 ppb (15) N/A 3.0 ppb (4) 11.0 ppb (8) 0.2 ppb (2) N/A 10.8 μg/m3 (45) 45.0
 
Jan. 22, 2020, 7 a.m. 13.5 ppb (12) 0.4 ppb (0) N/A 13.0 ppb (12) N/A 2.0 ppb (3) 15.0 ppb (12) 0.19 ppb (2) N/A 12.7 μg/m3 (51) 51.0
 
Jan. 22, 2020, 6 a.m. 11.5 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 17.0 ppb (13) 0.18 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 22, 2020, 5 a.m. 9.0 ppb (8) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 2.0 ppb (3) 19.0 ppb (15) 0.18 ppb (2) N/A 13.4 μg/m3 (53) 53.0
 
Jan. 22, 2020, 4 a.m. 9.8 ppb (9) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 19.0 ppb (15) 0.18 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
Jan. 22, 2020, 3 a.m. 9.0 ppb (8) 0.4 ppb (0) N/A 9.0 ppb (8) N/A 2.0 ppb (3) 21.0 ppb (16) 0.18 ppb (2) N/A 14.6 μg/m3 (56) 56.0
 
Jan. 22, 2020, 2 a.m. 16.7 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 16.0 ppb (12) 0.19 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
Jan. 22, 2020, 1 a.m. 19.9 ppb (18) 1.2 ppb (1) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 15.0 ppb (12) 0.2 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
Jan. 22, 2020, midnight 23.7 ppb (22) 2.7 ppb (3) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 13.0 ppb (10) 0.21 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
Jan. 21, 2020, 11 p.m. 15.9 ppb (15) 1.8 ppb (2) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A N/A 15.0
 
Jan. 21, 2020, 10 p.m. 15.0 ppb (14) 3.2 ppb (3) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A N/A 17.0
 
Jan. 21, 2020, 9 p.m. 13.5 ppb (12) 5.0 ppb (5) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 21, 2020, 8 p.m. 9.6 ppb (9) 3.3 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 27.0 ppb (21) N/A N/A 10.1 μg/m3 (42) 42.0
 
Jan. 21, 2020, 7 p.m. 8.9 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 21, 2020, 6 p.m. 9.7 ppb (9) 3.9 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2020, 5 p.m. 23.0 ppb (21) 10.6 ppb (10) 25.7 ppb (24) 12.0 ppb (11) N/A 1.0 ppb (1) 18.0 ppb (14) N/A N/A 22.0 μg/m3 (71) 71.0
 
Jan. 21, 2020, 4 p.m. 43.9 ppb (41) 24.3 ppb (23) 46.2 ppb (43) 20.0 ppb (19) N/A 1.0 ppb (1) 12.0 ppb (9) N/A N/A 22.7 μg/m3 (73) 73.0
 
Jan. 21, 2020, 3 p.m. 42.9 ppb (40) 22.2 ppb (21) 46.4 ppb (43) 21.0 ppb (19) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 18.3 μg/m3 (63) 63.0
 
Jan. 21, 2020, 2 p.m. 20.2 ppb (19) 4.2 ppb (4) 21.0 ppb (19) 16.0 ppb (15) N/A 1.0 ppb (1) 14.0 ppb (11) N/A N/A 21.8 μg/m3 (71) 71.0
 
Jan. 21, 2020, 1 p.m. 21.2 ppb (20) 3.6 ppb (3) 21.8 ppb (20) 18.0 ppb (17) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 15.3 μg/m3 (57) 57.0
 
Jan. 21, 2020, noon 26.1 ppb (24) 4.5 ppb (4) 26.9 ppb (25) 22.0 ppb (20) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 18.2 μg/m3 (63) 63.0
 
Jan. 21, 2020, 11 a.m. 24.8 ppb (23) 3.3 ppb (3) 25.9 ppb (24) 22.0 ppb (20) N/A 0.0 ppb (0) 5.0 ppb (4) N/A N/A 10.1 μg/m3 (42) 42.0
 
Jan. 21, 2020, 10 a.m. 25.5 ppb (24) 2.2 ppb (2) 25.9 ppb (24) 23.0 ppb (21) N/A 0.0 ppb (0) 4.0 ppb (3) N/A N/A 9.9 μg/m3 (41) 41.0
 
Jan. 21, 2020, 9 a.m. 23.9 ppb (22) 1.7 ppb (2) 24.4 ppb (23) 22.0 ppb (20) N/A 0.0 ppb (0) 4.0 ppb (3) N/A N/A 7.3 μg/m3 (30) 30.0
 
Jan. 21, 2020, 8 a.m. 17.1 ppb (16) 1.3 ppb (1) 17.3 ppb (16) 16.0 ppb (15) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 12.5 μg/m3 (51) 51.0
 
Jan. 21, 2020, 7 a.m. 19.8 ppb (18) 1.0 ppb (1) 19.8 ppb (18) 19.0 ppb (18) N/A 0.0 ppb (0) 8.0 ppb (6) N/A N/A 10.6 μg/m3 (44) 44.0
 
Jan. 21, 2020, 3 a.m. 18.0 ppb (17) 1.0 ppb (1) 18.2 ppb (17) 17.0 ppb (16) N/A 0.0 ppb (0) 11.0 ppb (8) N/A N/A 12.2 μg/m3 (50) 50.0
 
Jan. 21, 2020, 2 a.m. 17.9 ppb (17) 0.9 ppb (1) 18.1 ppb (17) 17.0 ppb (16) N/A 0.0 ppb (0) 11.0 ppb (8) N/A N/A 9.9 μg/m3 (41) 41.0
 
Jan. 21, 2020, 1 a.m. 15.1 ppb (14) 1.8 ppb (2) 14.8 ppb (14) 13.0 ppb (12) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 9.9 μg/m3 (41) 41.0
 
Jan. 21, 2020, midnight 11.1 ppb (10) 1.0 ppb (1) 11.9 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 20, 2020, 11 p.m. 11.8 ppb (11) 1.4 ppb (1) 12.5 ppb (12) 10.0 ppb (9) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 8.7 μg/m3 (36) 36.0
 
Jan. 20, 2020, 7 p.m. 12.6 ppb (12) 4.6 ppb (4) 13.5 ppb (12) 8.0 ppb (7) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 9.4 μg/m3 (39) 39.0
 
Jan. 20, 2020, 6 p.m. 16.7 ppb (15) 6.4 ppb (6) 18.1 ppb (17) 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 8.2 μg/m3 (34) 34.0
 
Jan. 20, 2020, 5 p.m. 11.1 ppb (10) 4.9 ppb (5) 12.8 ppb (12) 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 9.3 μg/m3 (39) 39.0
 
Jan. 20, 2020, 4 p.m. 13.2 ppb (12) 6.0 ppb (6) 14.6 ppb (14) 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 5.6 μg/m3 (23) 23.0
 
Jan. 20, 2020, 3 p.m. 10.4 ppb (10) 4.0 ppb (4) 11.0 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2020, 2 p.m. 9.6 ppb (9) 2.3 ppb (2) 10.0 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 20, 2020, 1 p.m. 9.1 ppb (8) 1.8 ppb (2) 7.8 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 5.2 μg/m3 (22) 22.0
 
Jan. 20, 2020, noon 5.4 ppb (5) 0.7 ppb (1) 5.5 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2020, 8 a.m. 4.7 ppb (4) 0.2 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 3.8 μg/m3 (16) 19.0
 
Jan. 20, 2020, 7 a.m. 4.8 ppb (4) 0.2 ppb (0) 4.8 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 3.6 μg/m3 (15) 19.0
 
Jan. 20, 2020, 6 a.m. 6.0 ppb (6) 0.2 ppb (0) 5.9 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 4.6 μg/m3 (19) 19.0
 
Jan. 20, 2020, 5 a.m. 6.7 ppb (6) 0.2 ppb (0) 6.5 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 4.3 μg/m3 (18) 18.0
 
Jan. 20, 2020, 4 a.m. 5.3 ppb (5) 0.2 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 2.9 μg/m3 (12) 19.0
 
Jan. 20, 2020, 3 a.m. 4.4 ppb (4) 0.2 ppb (0) 4.6 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 2.8 μg/m3 (12) 20.0
 
Jan. 20, 2020, 2 a.m. 5.3 ppb (5) 0.2 ppb (0) 5.6 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 6.3 μg/m3 (26) 26.0
 
Jan. 20, 2020, 1 a.m. 4.3 ppb (4) 0.2 ppb (0) 4.6 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 4.9 μg/m3 (20) 20.0
 
Jan. 20, 2020, midnight 4.2 ppb (4) 0.2 ppb (0) 4.4 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 3.5 μg/m3 (15) 20.0
 
Jan. 19, 2020, 11 p.m. 4.0 ppb (4) 0.2 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 19, 2020, 10 p.m. 3.0 ppb (3) 0.3 ppb (0) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 3.0 μg/m3 (12) 22.0
 
Jan. 19, 2020, 9 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 19, 2020, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 4.9 μg/m3 (20) 23.0
 
Jan. 19, 2020, 7 p.m. 3.0 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 1.4 μg/m3 (6) 23.0
 
Jan. 19, 2020, 6 p.m. 3.1 ppb (3) 1.3 ppb (1) 3.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 19, 2020, 5 p.m. 2.5 ppb (2) 1.0 ppb (1) 3.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 1.6 μg/m3 (7) 24.0
 
Jan. 19, 2020, 4 p.m. 2.3 ppb (2) 0.8 ppb (1) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 19, 2020, 3 p.m. 2.5 ppb (2) 0.7 ppb (1) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 7.2 μg/m3 (30) 30.0
 
Jan. 19, 2020, 2 p.m. 2.3 ppb (2) 0.4 ppb (0) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 3.8 μg/m3 (16) 24.0
 
Jan. 19, 2020, 1 p.m. 2.6 ppb (2) 0.2 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 2.7 μg/m3 (11) 23.0
 
Jan. 19, 2020, noon 2.5 ppb (2) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 4.9 μg/m3 (20) 23.0
 
Jan. 19, 2020, 11 a.m. 2.2 ppb (2) 0.2 ppb (0) 2.8 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 5.1 μg/m3 (21) 24.0
 
Jan. 19, 2020, 10 a.m. 2.4 ppb (2) 0.3 ppb (0) 2.8 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 4.4 μg/m3 (18) 24.0
 
Jan. 19, 2020, 9 a.m. 2.1 ppb (2) 0.2 ppb (0) 2.5 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 4.5 μg/m3 (19) 25.0
 
Jan. 19, 2020, 8 a.m. 2.2 ppb (2) 0.2 ppb (0) 2.6 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 19, 2020, 7 a.m. 2.2 ppb (2) 0.2 ppb (0) 2.8 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 3.5 μg/m3 (15) 25.0
 
Jan. 19, 2020, 6 a.m. 3.2 ppb (3) 0.2 ppb (0) 3.4 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 2.3 μg/m3 (10) 25.0
 
Jan. 19, 2020, 5 a.m. 2.4 ppb (2) 0.2 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 4.4 μg/m3 (18) 26.0
 
Jan. 19, 2020, 4 a.m. 3.7 ppb (3) 0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 7.2 μg/m3 (30) 30.0
 
Jan. 19, 2020, 3 a.m. 3.1 ppb (3) 0.2 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) N/A N/A 4.9 μg/m3 (20) 25.0
 
Jan. 19, 2020, 2 a.m. 2.6 ppb (2) 0.2 ppb (0) 2.9 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 2.6 μg/m3 (11) 25.0
 
Jan. 19, 2020, 1 a.m. 3.4 ppb (3) 0.2 ppb (0) 3.6 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 19, 2020, midnight 4.0 ppb (4) 0.3 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 2.4 μg/m3 (10) 24.0
 
Jan. 18, 2020, 11 p.m. 3.7 ppb (3) 0.2 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 2.7 μg/m3 (11) 24.0
 
Jan. 18, 2020, 10 p.m. 3.0 ppb (3) 0.2 ppb (0) 3.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 18, 2020, 9 p.m. 2.8 ppb (3) 0.6 ppb (1) 3.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 3.7 μg/m3 (15) 22.0
 
Jan. 18, 2020, 8 p.m. 2.3 ppb (2) 0.7 ppb (1) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 18, 2020, 7 p.m. 2.6 ppb (2) 0.6 ppb (1) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 4.8 μg/m3 (20) 20.0
 
Jan. 18, 2020, 6 p.m. 2.8 ppb (3) 0.7 ppb (1) 3.1 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A -0.5 μg/m3 (0) 15.0
 
Jan. 18, 2020, 5 p.m. 3.1 ppb (3) 0.8 ppb (1) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 17.0 ppb (13) N/A N/A 4.4 μg/m3 (18) 18.0
 
Jan. 18, 2020, 4 p.m. 2.9 ppb (3) 0.7 ppb (1) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 1.4 μg/m3 (6) 14.0
 
Jan. 18, 2020, 3 p.m. 2.8 ppb (3) 0.7 ppb (1) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 2.4 μg/m3 (10) 14.0
 
Jan. 18, 2020, 2 p.m. 2.8 ppb (3) 0.4 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 2.4 μg/m3 (10) 12.0
 
Jan. 18, 2020, 1 p.m. 7.5 ppb (7) 0.4 ppb (0) 7.1 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 0.5 μg/m3 (2) 12.0
 
Jan. 18, 2020, noon 13.0 ppb (12) 0.3 ppb (0) 11.7 ppb (11) 13.0 ppb (12) N/A 0.0 ppb (0) 13.0 ppb (10) N/A N/A 4.8 μg/m3 (20) 20.0
 
Jan. 18, 2020, 11 a.m. 8.5 ppb (8) 0.3 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A N/A 17.0 ppb (13) N/A N/A 4.1 μg/m3 (17) 17.0
 
Jan. 18, 2020, 10 a.m. 9.2 ppb (9) 0.2 ppb (0) 8.8 ppb (8) 9.0 ppb (8) N/A N/A 18.0 ppb (14) N/A N/A 4.1 μg/m3 (17) 17.0
 
Jan. 18, 2020, 9 a.m. 14.1 ppb (13) 0.5 ppb (0) 13.4 ppb (12) 14.0 ppb (13) N/A 0.0 ppb (0) 13.0 ppb (10) N/A N/A 2.9 μg/m3 (12) 13.0
 
Jan. 18, 2020, 8 a.m. 10.3 ppb (10) 0.5 ppb (0) 9.6 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (12) N/A N/A 2.3 μg/m3 (10) 12.0
 
Jan. 18, 2020, 7 a.m. 6.8 ppb (6) 0.3 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 8.6 μg/m3 (36) 36.0
 
Jan. 18, 2020, 6 a.m. 5.8 ppb (5) 0.2 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 2.5 μg/m3 (10) 14.0
 
Jan. 18, 2020, 5 a.m. 8.0 ppb (7) 0.3 ppb (0) 8.3 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 17.0 ppb (13) N/A N/A 5.1 μg/m3 (21) 21.0
 
Jan. 18, 2020, 4 a.m. 14.1 ppb (13) 1.2 ppb (1) 14.5 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 13.0 ppb (10) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 18, 2020, 3 a.m. 13.3 ppb (12) 1.3 ppb (1) 13.8 ppb (13) 12.0 ppb (11) N/A 0.0 ppb (0) 14.0 ppb (11) N/A N/A 9.3 μg/m3 (39) 39.0
 
Jan. 18, 2020, 2 a.m. 12.1 ppb (11) 1.7 ppb (2) 13.4 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 14.0 ppb (11) N/A N/A 13.4 μg/m3 (53) 53.0
 
Jan. 18, 2020, 1 a.m. 11.4 ppb (11) 1.6 ppb (1) 12.8 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (12) N/A N/A 17.1 μg/m3 (61) 61.0
 
Jan. 18, 2020, midnight 16.2 ppb (15) 2.8 ppb (3) 17.2 ppb (16) 14.0 ppb (13) N/A 0.0 ppb (0) 12.0 ppb (9) N/A N/A 10.3 μg/m3 (43) 43.0
 
Jan. 17, 2020, 11 p.m. 20.3 ppb (19) 3.5 ppb (3) 21.5 ppb (20) 17.0 ppb (16) N/A 1.0 ppb (1) 9.0 ppb (7) N/A N/A 18.3 μg/m3 (63) 63.0
 
Jan. 17, 2020, 10 p.m. 18.5 ppb (17) 4.3 ppb (4) 19.9 ppb (18) 14.0 ppb (13) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 9.7 μg/m3 (40) 40.0
 
Jan. 17, 2020, 9 p.m. 18.2 ppb (17) 5.9 ppb (5) 19.0 ppb (18) 12.0 ppb (11) N/A 0.0 ppb (0) 12.0 ppb (9) N/A N/A 13.9 μg/m3 (54) 54.0