AQSQID: 060750005

Site Name: San Francisco

Location: San Francisco (Potrero Hill), CA

Reporting: True, Located: True

Current AQI: 54.0

San Francisco (Potrero Hill) CA, US: 37.7658, -122.3978

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 29, 2020, 5 p.m. 58.2 ppb (54) 30.2 ppb (28) N/A 28.0 ppb (26) N/A N/A 9.0 ppb (7) 0.5 ppb (6) N/A 11.0 μg/m3 (46) 54.0
 
Jan. 29, 2020, 4 p.m. 72.0 ppb (69) 40.8 ppb (38) N/A 31.0 ppb (29) N/A N/A 5.0 ppb (4) 0.65 ppb (7) N/A 12.0 μg/m3 (50) 69.0
 
Jan. 29, 2020, 3 p.m. 75.5 ppb (73) 43.1 ppb (40) N/A 32.0 ppb (30) N/A N/A 3.0 ppb (2) 0.78 ppb (9) N/A 11.0 μg/m3 (46) 73.0
 
Jan. 29, 2020, 2 p.m. 52.7 ppb (49) 22.4 ppb (21) N/A 30.0 ppb (28) N/A N/A 2.0 ppb (2) 0.54 ppb (6) N/A 9.0 μg/m3 (38) 49.0
 
Jan. 29, 2020, 1 p.m. 31.2 ppb (29) 5.5 ppb (5) N/A 26.0 ppb (24) N/A N/A 5.0 ppb (4) 0.36 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 29, 2020, noon 19.1 ppb (18) 3.0 ppb (3) N/A 16.0 ppb (15) N/A N/A 16.0 ppb (12) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 29, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 29, 2020, 10 a.m. 15.6 ppb (14) 1.0 ppb (1) N/A 15.0 ppb (14) N/A N/A 16.0 ppb (12) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 29, 2020, 9 a.m. 12.4 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 29, 2020, 8 a.m. 23.5 ppb (22) 5.7 ppb (5) N/A 18.0 ppb (17) N/A N/A 18.0 ppb (14) 0.3 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 29, 2020, 7 a.m. 14.3 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A N/A 21.0 ppb (16) 0.34 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 29, 2020, 6 a.m. 8.6 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 29, 2020, 5 a.m. 10.3 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 29, 2020, 4 a.m. 8.2 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 29, 2020, 3 a.m. 8.5 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 29, 2020, 2 a.m. 8.1 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 29, 2020, 1 a.m. 6.5 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) 0.25 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 29, 2020, midnight 5.7 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 28, 2020, 11 p.m. 6.0 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 28, 2020, 10 p.m. 5.9 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
Jan. 28, 2020, 9 p.m. 5.3 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 28, 2020, 8 p.m. 9.1 ppb (8) 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 7 p.m. 30.2 ppb (28) 8.7 ppb (8) N/A 22.0 ppb (20) N/A N/A 15.0 ppb (12) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 28, 2020, 6 p.m. 25.2 ppb (23) 5.7 ppb (5) N/A 20.0 ppb (19) N/A N/A 14.0 ppb (11) 0.36 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 28, 2020, 5 p.m. 18.7 ppb (17) 3.4 ppb (3) N/A 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.32 ppb (4) N/A 3.0 μg/m3 (12) 17.0
 
Jan. 28, 2020, 4 p.m. 19.2 ppb (18) 2.5 ppb (2) N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 28, 2020, 3 p.m. 21.5 ppb (20) 2.6 ppb (2) N/A 19.0 ppb (18) N/A N/A 16.0 ppb (12) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 2 p.m. 21.6 ppb (20) 1.1 ppb (1) N/A 21.0 ppb (19) N/A N/A 15.0 ppb (12) 0.28 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 28, 2020, 1 p.m. 19.5 ppb (18) 1.8 ppb (2) N/A 18.0 ppb (17) N/A N/A 17.0 ppb (13) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 28, 2020, noon 9.9 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 28, 2020, 10 a.m. 4.5 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 28, 2020, 9 a.m. 5.4 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 28, 2020, 8 a.m. 7.6 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 28, 2020, 7 a.m. 6.4 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 28, 2020, 6 a.m. 7.3 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 5 a.m. 8.7 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 4 a.m. 9.5 ppb (9) 0.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 3 a.m. 8.7 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 28, 2020, 2 a.m. 6.5 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 28, 2020, 1 a.m. 6.8 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 28, 2020, midnight 7.2 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, 11 p.m. 7.9 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, 10 p.m. 6.7 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 27, 2020, 9 p.m. 6.9 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 27, 2020, 8 p.m. 8.9 ppb (8) 2.3 ppb (2) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 26.0
 
Jan. 27, 2020, 7 p.m. 7.4 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A -1.0 μg/m3 (0) 27.0
 
Jan. 27, 2020, 6 p.m. 35.3 ppb (33) 14.1 ppb (13) N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.42 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 27, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 27, 2020, 4 p.m. 18.5 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A 27.0 ppb (21) 0.42 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 3 p.m. 21.2 ppb (20) 2.5 ppb (2) N/A 19.0 ppb (18) N/A N/A 22.0 ppb (17) 0.43 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 27, 2020, 2 p.m. 38.3 ppb (35) 9.1 ppb (8) N/A 29.0 ppb (27) N/A N/A 5.0 ppb (4) 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2020, 1 p.m. 16.0 ppb (15) 0.1 ppb (0) N/A 16.0 ppb (15) N/A N/A 20.0 ppb (15) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 27, 2020, noon 15.0 ppb (14) 1.3 ppb (1) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 27, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, 10 a.m. 11.8 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2020, 9 a.m. 13.5 ppb (12) 0.3 ppb (0) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 27, 2020, 8 a.m. 17.6 ppb (16) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 7 a.m. 7.2 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 27, 2020, 6 a.m. 5.1 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 5 a.m. 5.2 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 4 a.m. 4.9 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 3 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.29 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2020, 2 a.m. 5.5 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 27, 2020, 1 a.m. 4.2 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 27, 2020, midnight 3.8 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 30.0
 
Jan. 26, 2020, 11 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) 0.3 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 26, 2020, 10 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
Jan. 26, 2020, 9 p.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
Jan. 26, 2020, 8 p.m. 2.3 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
Jan. 26, 2020, 7 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Jan. 26, 2020, 6 p.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 30.0
 
Jan. 26, 2020, 5 p.m. 5.1 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.3 ppb (3) N/A 1.0 μg/m3 (4) 28.0
 
Jan. 26, 2020, 4 p.m. 4.1 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.3 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 26, 2020, 3 p.m. 3.5 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 26.0
 
Jan. 26, 2020, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
Jan. 26, 2020, 1 p.m. 1.3 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.28 ppb (3) N/A -2.0 μg/m3 (0) 25.0
 
Jan. 26, 2020, noon 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.28 ppb (3) N/A -3.0 μg/m3 (0) 24.0
 
Jan. 26, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 26, 2020, 10 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 26, 2020, 9 a.m. 11.8 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 26, 2020, 8 a.m. 20.2 ppb (19) 1.4 ppb (1) N/A 19.0 ppb (18) N/A N/A 11.0 ppb (8) 0.38 ppb (4) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 26, 2020, 7 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.34 ppb (4) N/A 2.0 μg/m3 (8) 23.0
 
Jan. 26, 2020, 6 a.m. 3.0 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.33 ppb (4) N/A 1.0 μg/m3 (4) 23.0
 
Jan. 26, 2020, 5 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 24.0
 
Jan. 26, 2020, 4 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.34 ppb (4) N/A 1.0 μg/m3 (4) 23.0
 
Jan. 26, 2020, 3 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.34 ppb (4) N/A 2.0 μg/m3 (8) 23.0
 
Jan. 26, 2020, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 26, 2020, 1 a.m. 5.5 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 26, 2020, midnight 11.3 ppb (10) 1.3 ppb (1) N/A 10.0 ppb (9) N/A N/A 24.0 ppb (18) 0.45 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 11 p.m. 17.3 ppb (16) 2.9 ppb (3) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) 0.48 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 25, 2020, 10 p.m. 12.8 ppb (12) 2.7 ppb (3) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.41 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, 9 p.m. 12.6 ppb (12) 3.5 ppb (3) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.39 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 25, 2020, 8 p.m. 14.9 ppb (14) 3.9 ppb (4) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 7 p.m. 12.0 ppb (11) 3.6 ppb (3) N/A 8.0 ppb (7) N/A N/A 22.0 ppb (17) 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, 6 p.m. 12.4 ppb (11) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.38 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 25, 2020, 5 p.m. 21.6 ppb (20) 5.7 ppb (5) N/A 16.0 ppb (15) N/A N/A 11.0 ppb (8) 0.45 ppb (5) N/A 28.0 μg/m3 (84) 84.0
 
Jan. 25, 2020, 4 p.m. 14.6 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A 17.0 ppb (13) 0.4 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 25, 2020, 3 p.m. 8.6 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 2 p.m. 7.0 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 1 p.m. 10.0 ppb (9) 0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 25, 2020, noon 13.5 ppb (12) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 16.0 ppb (12) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 25, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 25, 2020, 10 a.m. 9.8 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) 0.33 ppb (4) N/A 2.0 μg/m3 (8) 18.0
 
Jan. 25, 2020, 9 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, 8 a.m. 7.6 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, 7 a.m. 6.8 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, 6 a.m. 10.0 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, 5 a.m. 9.9 ppb (9) 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 24.0 ppb (18) 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 25, 2020, 4 a.m. 9.1 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) 0.36 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, 3 a.m. 8.0 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) 0.34 ppb (4) N/A 1.0 μg/m3 (4) 21.0
 
Jan. 25, 2020, 2 a.m. 9.4 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.36 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, 1 a.m. 11.8 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.37 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, midnight 12.3 ppb (11) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.39 ppb (4) N/A 2.0 μg/m3 (8) 20.0
 
Jan. 24, 2020, 11 p.m. 8.1 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.35 ppb (4) N/A 3.0 μg/m3 (12) 23.0
 
Jan. 24, 2020, 10 p.m. 12.3 ppb (11) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 24, 2020, 9 p.m. 15.4 ppb (14) 4.9 ppb (5) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, 8 p.m. 13.7 ppb (13) 4.3 ppb (4) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, 7 p.m. 15.9 ppb (15) 5.2 ppb (5) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.38 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 24, 2020, 6 p.m. 29.8 ppb (28) 14.2 ppb (13) N/A 16.0 ppb (15) N/A N/A 11.0 ppb (8) 0.52 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 24, 2020, 5 p.m. 51.3 ppb (48) 30.3 ppb (28) N/A 21.0 ppb (19) N/A N/A 4.0 ppb (3) 0.65 ppb (7) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 24, 2020, 4 p.m. 65.3 ppb (62) 45.4 ppb (42) N/A 20.0 ppb (19) N/A N/A 3.0 ppb (2) 0.68 ppb (8) N/A 12.0 μg/m3 (50) 62.0
 
Jan. 24, 2020, 3 p.m. 48.9 ppb (45) 25.0 ppb (23) N/A 24.0 ppb (22) N/A N/A 2.0 ppb (2) 0.57 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 24, 2020, 2 p.m. 43.5 ppb (40) 20.3 ppb (19) N/A 23.0 ppb (21) N/A N/A 2.0 ppb (2) 0.62 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 24, 2020, 1 p.m. 33.3 ppb (31) 11.5 ppb (11) N/A 22.0 ppb (20) N/A N/A 2.0 ppb (2) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, noon 33.4 ppb (31) 12.2 ppb (11) N/A 21.0 ppb (19) N/A N/A 2.0 ppb (2) 0.47 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2020, 11 a.m. 16.2 ppb (15) 1.9 ppb (2) N/A 14.0 ppb (13) N/A N/A 6.0 ppb (5) 0.38 ppb (4) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 24, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, 9 a.m. 10.8 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 13.0 ppb (10) 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 24, 2020, 8 a.m. 22.4 ppb (21) 2.6 ppb (2) N/A 20.0 ppb (19) N/A N/A 8.0 ppb (6) 0.47 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 24, 2020, 7 a.m. 32.0 ppb (30) 4.4 ppb (4) N/A 28.0 ppb (26) N/A N/A 3.0 ppb (2) 0.64 ppb (7) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 24, 2020, 6 a.m. 30.6 ppb (28) 3.3 ppb (3) N/A 27.0 ppb (25) N/A N/A 4.0 ppb (3) 0.57 ppb (6) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 24, 2020, 5 a.m. 21.0 ppb (19) 2.2 ppb (2) N/A 19.0 ppb (18) N/A N/A 13.0 ppb (10) 0.43 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 24, 2020, 4 a.m. 17.8 ppb (16) 0.6 ppb (1) N/A 17.0 ppb (16) N/A N/A 15.0 ppb (12) 0.46 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 24, 2020, 3 a.m. 21.8 ppb (20) 1.5 ppb (1) N/A 20.0 ppb (19) N/A N/A 12.0 ppb (9) 0.5 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2020, 2 a.m. 21.0 ppb (19) 1.6 ppb (1) N/A 19.0 ppb (18) N/A N/A 14.0 ppb (11) 0.47 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2020, 1 a.m. 23.6 ppb (22) 1.4 ppb (1) N/A 22.0 ppb (20) N/A N/A 11.0 ppb (8) 0.48 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2020, midnight 18.7 ppb (17) 3.6 ppb (3) N/A 15.0 ppb (14) N/A N/A 17.0 ppb (13) 0.43 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2020, 11 p.m. 21.5 ppb (20) 6.0 ppb (6) N/A 16.0 ppb (15) N/A N/A 17.0 ppb (13) 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2020, 10 p.m. 28.3 ppb (26) 8.9 ppb (8) N/A 19.0 ppb (18) N/A N/A 15.0 ppb (12) 0.48 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 23, 2020, 9 p.m. 20.2 ppb (19) 6.2 ppb (6) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) 0.41 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 23, 2020, 8 p.m. 22.3 ppb (21) 7.1 ppb (7) N/A 15.0 ppb (14) N/A N/A 19.0 ppb (15) 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2020, 7 p.m. 23.5 ppb (22) 8.5 ppb (8) N/A 15.0 ppb (14) N/A N/A 19.0 ppb (15) 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2020, 6 p.m. 38.3 ppb (35) 17.0 ppb (16) N/A 21.0 ppb (19) N/A N/A 11.0 ppb (8) 0.42 ppb (5) N/A 8.0 μg/m3 (33) 35.0
 
Jan. 23, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 23, 2020, 3 p.m. 51.9 ppb (48) 22.4 ppb (21) N/A 30.0 ppb (28) N/A N/A 3.0 ppb (2) 0.58 ppb (6) N/A N/A 48.0
 
Jan. 23, 2020, 2 p.m. 54.2 ppb (50) 23.8 ppb (22) N/A 30.0 ppb (28) N/A N/A 2.0 ppb (2) 0.55 ppb (6) N/A 8.0 μg/m3 (33) 50.0
 
Jan. 23, 2020, 1 p.m. 29.8 ppb (28) 4.5 ppb (4) N/A 25.0 ppb (23) N/A N/A 3.0 ppb (2) 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2020, noon 17.4 ppb (16) 0.3 ppb (0) N/A 17.0 ppb (16) N/A N/A 10.0 ppb (8) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 10 a.m. 23.7 ppb (22) 1.0 ppb (1) N/A 23.0 ppb (21) N/A N/A 5.0 ppb (4) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2020, 9 a.m. 20.8 ppb (19) 1.0 ppb (1) N/A 20.0 ppb (19) N/A N/A 9.0 ppb (7) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 23, 2020, 8 a.m. 28.0 ppb (26) 3.6 ppb (3) N/A 25.0 ppb (23) N/A N/A 8.0 ppb (6) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 23, 2020, 7 a.m. 23.7 ppb (22) 0.4 ppb (0) N/A 23.0 ppb (21) N/A N/A 9.0 ppb (7) 0.54 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2020, 6 a.m. 24.2 ppb (22) 1.3 ppb (1) N/A 23.0 ppb (21) N/A N/A 11.0 ppb (8) 0.51 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2020, 5 a.m. 32.9 ppb (30) 3.0 ppb (3) N/A 30.0 ppb (28) N/A N/A 6.0 ppb (5) 0.62 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 23, 2020, 4 a.m. 39.6 ppb (37) 5.0 ppb (5) N/A 35.0 ppb (32) N/A N/A 5.0 ppb (4) 0.66 ppb (7) N/A 6.0 μg/m3 (25) 37.0
 
Jan. 23, 2020, 3 a.m. 36.1 ppb (33) 2.9 ppb (3) N/A 33.0 ppb (31) N/A N/A 7.0 ppb (5) 0.67 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2020, 2 a.m. 26.5 ppb (25) 0.6 ppb (1) N/A 26.0 ppb (24) N/A N/A 16.0 ppb (12) 0.55 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2020, 1 a.m. 17.4 ppb (16) 0.5 ppb (0) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.43 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 23, 2020, midnight 18.7 ppb (17) 2.5 ppb (2) N/A 16.0 ppb (15) N/A N/A 29.0 ppb (22) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 22, 2020, 11 p.m. 15.3 ppb (14) 3.3 ppb (3) N/A 12.0 ppb (11) N/A N/A 30.0 ppb (23) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 22, 2020, 10 p.m. 11.3 ppb (10) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 22, 2020, 9 p.m. 10.2 ppb (9) 2.6 ppb (2) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 22, 2020, 8 p.m. 12.6 ppb (12) 3.8 ppb (4) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2020, 7 p.m. 20.1 ppb (19) 7.5 ppb (7) N/A 13.0 ppb (12) N/A N/A 23.0 ppb (18) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 22, 2020, 6 p.m. 29.2 ppb (27) 12.3 ppb (11) N/A 17.0 ppb (16) N/A N/A 15.0 ppb (12) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0