ID: 206

AQSQID: 060750005

Site Name: San Francisco

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

Updated: Jan. 28, 2021, 9:31 a.m.

Location: San Francisco (Potrero Hill), CA

Reporting: True, Located: True

Current AQI: 28.0

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. 28, 2021, 7 a.m. 5.4 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (28) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 28, 2021, 6 a.m. 7.4 ppb (7) -0.4 ppb (0) N/A 8.0 ppb (8) N/A N/A 29.0 ppb (27) 0.24 ppb (3) N/A 1.0 μg/m3 (5) 27.0
 
Jan. 28, 2021, 5 a.m. 5.3 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) 0.2 ppb (3) N/A 0.0 μg/m3 (0) 32.0
 
Jan. 28, 2021, 4 a.m. 5.8 ppb (6) -0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 28, 2021, 3 a.m. 5.5 ppb (6) 0.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (35) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 35.0
 
Jan. 28, 2021, 2 a.m. 4.4 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Jan. 28, 2021, 1 a.m. 4.3 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 38.0
 
Jan. 28, 2021, midnight 4.2 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 38.0
 
Jan. 27, 2021, 11 p.m. 5.8 ppb (6) 0.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (36) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 36.0
 
Jan. 27, 2021, 10 p.m. 9.3 ppb (9) 1.3 ppb (2) N/A 8.0 ppb (8) N/A N/A 31.0 ppb (29) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
Jan. 27, 2021, 9 p.m. 10.9 ppb (11) 1.8 ppb (2) N/A 9.0 ppb (9) N/A N/A 29.0 ppb (27) 0.28 ppb (4) N/A 3.0 μg/m3 (13) 27.0
 
Jan. 27, 2021, 8 p.m. 12.6 ppb (12) 2.7 ppb (3) N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) 0.25 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
Jan. 27, 2021, 7 p.m. 12.5 ppb (12) 2.6 ppb (3) N/A 10.0 ppb (10) N/A N/A 29.0 ppb (27) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 27, 2021, 6 p.m. 14.6 ppb (14) 3.8 ppb (4) N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2021, 5 p.m. 12.7 ppb (12) 2.5 ppb (3) N/A 10.0 ppb (10) N/A N/A 29.0 ppb (27) 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2021, 4 p.m. 24.2 ppb (23) 6.7 ppb (7) N/A 18.0 ppb (17) N/A N/A 27.0 ppb (25) 0.31 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2021, 3 p.m. 7.5 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 36.0 ppb (34) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 27, 2021, 2 p.m. 5.6 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2021, 1 p.m. 2.2 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.22 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 27, 2021, noon 2.3 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.22 ppb (3) N/A 8.0 μg/m3 (34) 38.0
 
Jan. 27, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 27, 2021, 10 a.m. 1.5 ppb (2) -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 39.0
 
Jan. 27, 2021, 9 a.m. 2.3 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 34.0
 
Jan. 27, 2021, 8 a.m. 2.0 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
Jan. 27, 2021, 7 a.m. 1.5 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 36.0
 
Jan. 27, 2021, 6 a.m. 1.7 ppb (2) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 36.0
 
Jan. 27, 2021, 5 a.m. 1.9 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 36.0
 
Jan. 27, 2021, 4 a.m. 2.3 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.21 ppb (3) N/A -2.0 μg/m3 (0) 37.0
 
Jan. 27, 2021, 3 a.m. 3.4 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.21 ppb (3) N/A -1.0 μg/m3 (0) 36.0
 
Jan. 27, 2021, 2 a.m. 3.3 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.21 ppb (3) N/A 1.0 μg/m3 (5) 36.0
 
Jan. 27, 2021, 1 a.m. 5.0 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 34.0
 
Jan. 27, 2021, midnight 4.7 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 35.0
 
Jan. 26, 2021, 11 p.m. 11.6 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) 0.27 ppb (4) N/A 4.0 μg/m3 (17) 32.0
 
Jan. 26, 2021, 10 p.m. 6.3 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (35) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 35.0
 
Jan. 26, 2021, 9 p.m. 17.9 ppb (17) 8.2 ppb (8) N/A 10.0 ppb (10) N/A N/A 32.0 ppb (30) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 26, 2021, 8 p.m. 23.2 ppb (22) 10.1 ppb (10) N/A 13.0 ppb (13) N/A N/A 27.0 ppb (25) 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 26, 2021, 7 p.m. 30.2 ppb (29) 13.7 ppb (13) N/A 17.0 ppb (17) N/A N/A 24.0 ppb (23) 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 26, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 26, 2021, 5 p.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. 26, 2021, 4 p.m. 32.3 ppb (31) 10.6 ppb (10) N/A 22.0 ppb (21) N/A N/A 14.0 ppb (13) 0.46 ppb (6) N/A 7.0 μg/m3 (30) 31.0
 
Jan. 26, 2021, 3 p.m. 44.7 ppb (43) 15.4 ppb (15) N/A 29.0 ppb (28) N/A N/A 8.0 ppb (8) 0.48 ppb (6) N/A 5.0 μg/m3 (21) 43.0
 
Jan. 26, 2021, 2 p.m. 40.6 ppb (39) 7.2 ppb (7) N/A 33.0 ppb (32) N/A N/A 4.0 ppb (4) 0.47 ppb (6) N/A 7.0 μg/m3 (30) 39.0
 
Jan. 26, 2021, 1 p.m. 26.4 ppb (25) 2.2 ppb (3) N/A 24.0 ppb (23) N/A N/A 11.0 ppb (11) 0.39 ppb (5) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 26, 2021, noon 18.5 ppb (18) 1.3 ppb (2) N/A 17.0 ppb (17) N/A N/A 21.0 ppb (20) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 26, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 26, 2021, 10 a.m. 15.8 ppb (15) 0.6 ppb (1) N/A 15.0 ppb (15) N/A N/A 23.0 ppb (22) 0.38 ppb (5) N/A 3.0 μg/m3 (13) 22.0
 
Jan. 26, 2021, 9 a.m. 14.5 ppb (14) 1.3 ppb (2) N/A 13.0 ppb (13) N/A N/A 24.0 ppb (23) 0.37 ppb (5) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 26, 2021, 8 a.m. 12.7 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 26.0
 
Jan. 26, 2021, 7 a.m. 6.3 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 34.0
 
Jan. 26, 2021, 6 a.m. 6.8 ppb (7) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (33) 0.31 ppb (4) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 26, 2021, 5 a.m. 9.5 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (9) N/A N/A 33.0 ppb (31) 0.34 ppb (4) N/A 3.0 μg/m3 (13) 31.0
 
Jan. 26, 2021, 4 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 2.0 μg/m3 (9) 35.0
 
Jan. 26, 2021, 3 a.m. 5.6 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 36.0
 
Jan. 26, 2021, 2 a.m. 5.5 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 36.0
 
Jan. 26, 2021, 1 a.m. 5.5 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) 0.32 ppb (4) N/A 3.0 μg/m3 (13) 36.0
 
Jan. 26, 2021, midnight 5.6 ppb (6) 1.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 36.0
 
Jan. 25, 2021, 11 p.m. 4.9 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 25, 2021, 10 p.m. 4.6 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 37.0
 
Jan. 25, 2021, 9 p.m. 5.5 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.26 ppb (4) N/A 6.0 μg/m3 (25) 35.0
 
Jan. 25, 2021, 8 p.m. 5.7 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.26 ppb (4) N/A 3.0 μg/m3 (13) 34.0
 
Jan. 25, 2021, 7 p.m. 5.7 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.27 ppb (4) N/A 3.0 μg/m3 (13) 34.0
 
Jan. 25, 2021, 6 p.m. 5.7 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.28 ppb (4) N/A 0.0 μg/m3 (0) 34.0
 
Jan. 25, 2021, 5 p.m. 7.5 ppb (8) 2.6 ppb (3) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.32 ppb (4) N/A 0.0 μg/m3 (0) 33.0
 
Jan. 25, 2021, 4 p.m. 8.9 ppb (9) 2.3 ppb (3) N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 32.0
 
Jan. 25, 2021, 3 p.m. 11.4 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A 31.0 ppb (29) 0.38 ppb (5) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 25, 2021, 2 p.m. 6.5 ppb (7) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.32 ppb (4) N/A 7.0 μg/m3 (30) 34.0
 
Jan. 25, 2021, 1 p.m. 4.1 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 36.0
 
Jan. 25, 2021, noon 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.28 ppb (4) N/A 2.0 μg/m3 (9) 37.0
 
Jan. 25, 2021, 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 (13) 13.0
 
Jan. 25, 2021, 10 a.m. 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 38.0
 
Jan. 25, 2021, 9 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.27 ppb (4) N/A 6.0 μg/m3 (25) 38.0
 
Jan. 25, 2021, 8 a.m. 2.4 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 38.0
 
Jan. 25, 2021, 7 a.m. 3.2 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.29 ppb (4) N/A 2.0 μg/m3 (9) 36.0
 
Jan. 25, 2021, 6 a.m. 4.2 ppb (4) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 35.0
 
Jan. 25, 2021, 5 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 36.0
 
Jan. 25, 2021, 4 a.m. 3.8 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.29 ppb (4) N/A 3.0 μg/m3 (13) 35.0
 
Jan. 25, 2021, 3 a.m. 5.0 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.31 ppb (4) N/A 4.0 μg/m3 (17) 34.0
 
Jan. 25, 2021, 2 a.m. 4.7 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.32 ppb (4) N/A 3.0 μg/m3 (13) 35.0
 
Jan. 25, 2021, 1 a.m. 5.1 ppb (5) 0.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 37.0
 
Jan. 25, 2021, midnight 4.8 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) 0.32 ppb (4) N/A 7.0 μg/m3 (30) 38.0
 
Jan. 24, 2021, 11 p.m. 3.8 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.3 ppb (4) N/A 4.0 μg/m3 (17) 38.0
 
Jan. 24, 2021, 10 p.m. 4.7 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.31 ppb (4) N/A 4.0 μg/m3 (17) 37.0
 
Jan. 24, 2021, 9 p.m. 4.8 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.29 ppb (4) N/A 2.0 μg/m3 (9) 35.0
 
Jan. 24, 2021, 8 p.m. 4.1 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.3 ppb (4) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 24, 2021, 7 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 35.0
 
Jan. 24, 2021, 6 p.m. 5.5 ppb (6) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.3 ppb (4) N/A 7.0 μg/m3 (30) 33.0
 
Jan. 24, 2021, 5 p.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) 0.29 ppb (4) N/A 5.0 μg/m3 (21) 32.0
 
Jan. 24, 2021, 4 p.m. 4.3 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 32.0
 
Jan. 24, 2021, 3 p.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 24, 2021, 2 p.m. 6.7 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (25) 0.27 ppb (4) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 24, 2021, 1 p.m. 4.3 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (25) 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2021, noon 4.4 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) 0.28 ppb (4) N/A 3.0 μg/m3 (13) 23.0
 
Jan. 24, 2021, 11 a.m. 9.7 ppb (10) 0.7 ppb (1) N/A 9.0 ppb (9) N/A N/A 13.0 ppb (13) 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 24, 2021, 9 a.m. 18.0 ppb (17) 3.4 ppb (4) N/A 15.0 ppb (15) N/A N/A 8.0 ppb (8) 0.45 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 24, 2021, 8 a.m. 21.7 ppb (21) 5.9 ppb (6) N/A 16.0 ppb (16) N/A N/A 6.0 ppb (6) 0.52 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 24, 2021, 7 a.m. 19.9 ppb (19) 4.9 ppb (5) N/A 15.0 ppb (15) N/A N/A 14.0 ppb (13) 0.39 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 24, 2021, 6 a.m. 11.1 ppb (11) 0.9 ppb (1) N/A 10.0 ppb (10) N/A N/A 15.0 ppb (14) 0.4 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2021, 5 a.m. 25.0 ppb (24) 4.0 ppb (4) N/A 21.0 ppb (20) N/A N/A 5.0 ppb (5) 0.52 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
Jan. 24, 2021, 4 a.m. 20.5 ppb (20) 1.3 ppb (2) N/A 19.0 ppb (18) N/A N/A 7.0 ppb (7) 0.49 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2021, 3 a.m. 14.0 ppb (14) 1.0 ppb (1) N/A 13.0 ppb (13) N/A N/A 13.0 ppb (13) 0.4 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 24, 2021, 2 a.m. 10.3 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (10) N/A N/A 17.0 ppb (16) 0.4 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 24, 2021, 1 a.m. 6.6 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 24, 2021, midnight 5.6 ppb (6) 1.4 ppb (2) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2021, 11 p.m. 4.8 ppb (5) 1.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 23, 2021, 10 p.m. 5.4 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 9 p.m. 5.0 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 23, 2021, 8 p.m. 8.2 ppb (8) 3.1 ppb (3) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (27) 0.34 ppb (4) N/A 3.0 μg/m3 (13) 27.0
 
Jan. 23, 2021, 7 p.m. 9.1 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (26) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 23, 2021, 6 p.m. 12.7 ppb (12) 5.4 ppb (6) N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.32 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 5 p.m. 13.4 ppb (13) 5.5 ppb (6) N/A 8.0 ppb (8) N/A N/A 28.0 ppb (26) 0.3 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 23, 2021, 4 p.m. 21.0 ppb (20) 9.1 ppb (9) N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 3 p.m. 17.1 ppb (17) 7.2 ppb (7) N/A 10.0 ppb (10) N/A N/A 27.0 ppb (25) 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 23, 2021, 2 p.m. 12.5 ppb (12) 6.4 ppb (7) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2021, 1 p.m. 13.5 ppb (13) 5.5 ppb (6) N/A 8.0 ppb (8) N/A N/A 25.0 ppb (24) 0.31 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Jan. 23, 2021, noon 12.1 ppb (12) 4.6 ppb (5) N/A 7.0 ppb (7) N/A N/A 23.0 ppb (22) 0.32 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Jan. 23, 2021, 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 (30) 30.0
 
Jan. 23, 2021, 10 a.m. 8.2 ppb (8) 1.5 ppb (2) N/A 7.0 ppb (7) N/A N/A 23.0 ppb (22) 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 9 a.m. 12.8 ppb (13) 1.3 ppb (2) N/A 12.0 ppb (12) N/A N/A 20.0 ppb (19) 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2021, 8 a.m. 36.1 ppb (35) 11.0 ppb (11) N/A 25.0 ppb (24) N/A N/A 11.0 ppb (11) 0.48 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2021, 7 a.m. 28.5 ppb (27) 4.2 ppb (4) N/A 24.0 ppb (23) N/A N/A 13.0 ppb (13) 0.47 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
Jan. 23, 2021, 6 a.m. 32.2 ppb (31) 2.0 ppb (2) N/A 30.0 ppb (29) N/A N/A 7.0 ppb (7) 0.55 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Jan. 23, 2021, 5 a.m. 31.7 ppb (30) 2.3 ppb (3) N/A 29.0 ppb (28) N/A N/A 9.0 ppb (9) 0.57 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 23, 2021, 4 a.m. 29.1 ppb (28) 1.5 ppb (2) N/A 28.0 ppb (27) N/A N/A 10.0 ppb (10) 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2021, 3 a.m. 18.9 ppb (18) 1.1 ppb (2) N/A 18.0 ppb (17) N/A N/A 21.0 ppb (20) 0.44 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2021, 2 a.m. 12.7 ppb (12) 0.4 ppb (1) N/A 12.0 ppb (12) N/A N/A 27.0 ppb (25) 0.42 ppb (5) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 23, 2021, 1 a.m. 10.5 ppb (10) 2.3 ppb (3) N/A 8.0 ppb (8) N/A N/A 35.0 ppb (33) 0.34 ppb (4) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 23, 2021, midnight 8.2 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (34) 0.33 ppb (4) N/A 3.0 μg/m3 (13) 34.0
 
Jan. 22, 2021, 11 p.m. 6.2 ppb (6) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 35.0
 
Jan. 22, 2021, 10 p.m. 5.5 ppb (6) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.32 ppb (4) N/A 2.0 μg/m3 (9) 37.0
 
Jan. 22, 2021, 9 p.m. 6.4 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.33 ppb (4) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 22, 2021, 8 p.m. 4.7 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 35.0
 
Jan. 22, 2021, 7 p.m. 5.8 ppb (6) 1.4 ppb (2) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 34.0
 
Jan. 22, 2021, 6 p.m. 8.3 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.34 ppb (4) N/A 7.0 μg/m3 (30) 31.0
 
Jan. 22, 2021, 5 p.m. 7.8 ppb (8) 1.4 ppb (2) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 32.0
 
Jan. 22, 2021, 4 p.m. 8.3 ppb (8) 1.4 ppb (2) N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) 0.35 ppb (4) N/A 3.0 μg/m3 (13) 32.0
 
Jan. 22, 2021, 3 p.m. 13.7 ppb (13) 1.4 ppb (2) N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) 0.37 ppb (5) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 22, 2021, 2 p.m. 11.4 ppb (11) 0.8 ppb (1) N/A 11.0 ppb (11) N/A N/A 28.0 ppb (26) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 22, 2021, 1 p.m. 4.9 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.28 ppb (4) N/A 2.0 μg/m3 (9) 34.0
 
Jan. 22, 2021, noon 4.8 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.29 ppb (4) N/A 2.0 μg/m3 (9) 31.0
 
Jan. 22, 2021, 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 (13) 13.0
 
Jan. 22, 2021, 10 a.m. 5.9 ppb (6) 0.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (28) 0.3 ppb (4) N/A 2.0 μg/m3 (9) 28.0
 
Jan. 22, 2021, 9 a.m. 4.1 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.28 ppb (4) N/A 3.0 μg/m3 (13) 30.0
 
Jan. 22, 2021, 8 a.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 31.0
 
Jan. 22, 2021, 7 a.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.29 ppb (4) N/A 5.0 μg/m3 (21) 30.0
 
Jan. 22, 2021, 6 a.m. 3.8 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.29 ppb (4) N/A 2.0 μg/m3 (9) 30.0
 
Jan. 22, 2021, 5 a.m. 4.8 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.31 ppb (4) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 22, 2021, 4 a.m. 4.3 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 22, 2021, 3 a.m. 4.6 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 22, 2021, 2 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (29) 0.33 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 22, 2021, 1 a.m. 8.0 ppb (8) 0.6 ppb (1) N/A 7.0 ppb (7) N/A N/A 29.0 ppb (27) 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 22, 2021, midnight 8.4 ppb (8) 1.3 ppb (2) N/A 7.0 ppb (7) N/A N/A 30.0 ppb (28) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 21, 2021, 11 p.m. 7.8 ppb (8) 1.5 ppb (2) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (29) 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2021, 10 p.m. 10.3 ppb (10) 2.1 ppb (2) N/A 8.0 ppb (8) N/A N/A 30.0 ppb (28) 0.4 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Jan. 21, 2021, 9 p.m. 9.6 ppb (10) 2.4 ppb (3) N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) 0.38 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Jan. 21, 2021, 8 p.m. 10.0 ppb (10) 2.7 ppb (3) N/A 7.0 ppb (7) N/A N/A 29.0 ppb (27) 0.37 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
Jan. 21, 2021, 7 p.m. 35.3 ppb (34) 17.1 ppb (17) N/A 18.0 ppb (17) N/A N/A 15.0 ppb (14) 0.5 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 21, 2021, 6 p.m. 51.1 ppb (49) 28.7 ppb (28) N/A 22.0 ppb (21) N/A N/A 10.0 ppb (10) 0.5 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Jan. 21, 2021, 5 p.m. 62.0 ppb (60) 38.1 ppb (36) N/A 24.0 ppb (23) N/A N/A 8.0 ppb (8) 0.55 ppb (7) N/A N/A 60.0
 
Jan. 21, 2021, 4 p.m. 73.0 ppb (72) 43.8 ppb (42) N/A 29.0 ppb (28) N/A N/A 5.0 ppb (5) 0.79 ppb (10) N/A 10.0 μg/m3 (42) 72.0
 
Jan. 21, 2021, 3 p.m. 77.1 ppb (76) 45.4 ppb (43) N/A 32.0 ppb (31) N/A N/A 3.0 ppb (3) 0.87 ppb (11) N/A 15.0 μg/m3 (58) 76.0
 
Jan. 21, 2021, 2 p.m. 57.0 ppb (55) 25.6 ppb (25) N/A 31.0 ppb (30) N/A N/A 2.0 ppb (2) 0.67 ppb (8) N/A 7.0 μg/m3 (30) 55.0
 
Jan. 21, 2021, 1 p.m. 54.1 ppb (52) 22.1 ppb (21) N/A 32.0 ppb (31) N/A N/A 2.0 ppb (2) 0.63 ppb (7) N/A 9.0 μg/m3 (38) 52.0
 
Jan. 21, 2021, noon 41.3 ppb (39) 12.1 ppb (12) N/A 29.0 ppb (28) N/A N/A 3.0 ppb (3) 0.55 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Jan. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (55) 55.0
 
Jan. 21, 2021, 10 a.m. 43.6 ppb (42) 13.5 ppb (13) N/A 30.0 ppb (29) N/A N/A 3.0 ppb (3) 0.52 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 21, 2021, 9 a.m. 36.5 ppb (35) 6.4 ppb (7) N/A 30.0 ppb (29) N/A N/A 3.0 ppb (3) 0.48 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Jan. 21, 2021, 8 a.m. 36.9 ppb (35) 5.1 ppb (5) N/A 32.0 ppb (31) N/A N/A 3.0 ppb (3) 0.51 ppb (6) N/A 11.0 μg/m3 (46) 46.0