AQSQID: 060811001

Site Name: Redwood City

Location: San Mateo Co, CA

Reporting: True, Located: True

Current AQI: 31.0

San Mateo Co CA, US: 37.4828, -122.2022

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 16, 2019, 9 a.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
Jan. 16, 2019, 8 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 16, 2019, 7 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.22 ppb (2) N/A -3.0 μg/m3 (0) 31.0
 
Jan. 16, 2019, 6 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.23 ppb (3) N/A -4.0 μg/m3 (0) 29.0
 
Jan. 16, 2019, 5 a.m. 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 30.0
 
Jan. 16, 2019, 4 a.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
Jan. 16, 2019, 3 a.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 30.0
 
Jan. 16, 2019, 2 a.m. 6.2 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 24.0
 
Jan. 16, 2019, 1 a.m. 6.1 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A -3.0 μg/m3 (0) 24.0
 
Jan. 16, 2019, midnight 5.5 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.28 ppb (3) N/A N/A 24.0
 
Jan. 15, 2019, 11 p.m. 7.5 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) 0.29 ppb (3) N/A -2.0 μg/m3 (0) 22.0
 
Jan. 15, 2019, 10 p.m. 8.0 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) 0.27 ppb (3) N/A 1.0 μg/m3 (4) 22.0
 
Jan. 15, 2019, 9 p.m. 9.3 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 8 p.m. 9.3 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.29 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 15, 2019, 6 p.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. 15, 2019, 5 p.m. 13.2 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.36 ppb (4) N/A 2.0 μg/m3 (8) 20.0
 
Jan. 15, 2019, 4 p.m. 12.8 ppb (12) 3.2 ppb (3) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.34 ppb (4) N/A 1.0 μg/m3 (4) 22.0
 
Jan. 15, 2019, 3 p.m. 10.8 ppb (10) 1.7 ppb (2) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.33 ppb (4) N/A 0.0 μg/m3 (0) 22.0
 
Jan. 15, 2019, 2 p.m. 7.7 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
Jan. 15, 2019, 1 p.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 15, 2019, noon 3.5 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
Jan. 15, 2019, 10 a.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 0.0 μg/m3 (0) 27.0
 
Jan. 15, 2019, 9 a.m. 7.8 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.31 ppb (3) N/A 1.0 μg/m3 (4) 17.0
 
Jan. 15, 2019, 8 a.m. 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
Jan. 15, 2019, 7 a.m. 4.3 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.27 ppb (3) N/A N/A 23.0
 
Jan. 15, 2019, 6 a.m. 4.5 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A -2.0 μg/m3 (0) 23.0
 
Jan. 15, 2019, 5 a.m. 18.0 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A 14.0 ppb (11) 0.44 ppb (5) N/A 1.0 μg/m3 (4) 17.0
 
Jan. 15, 2019, 4 a.m. 13.1 ppb (12) 1.3 ppb (1) N/A 12.0 ppb (11) N/A N/A 22.0 ppb (17) 0.39 ppb (4) N/A 0.0 μg/m3 (0) 17.0
 
Jan. 15, 2019, 3 a.m. 14.6 ppb (14) 1.7 ppb (2) N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 15, 2019, 2 a.m. 11.2 ppb (10) 1.3 ppb (1) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.32 ppb (4) N/A 2.0 μg/m3 (8) 21.0
 
Jan. 15, 2019, 1 a.m. 9.2 ppb (9) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.32 ppb (4) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 15, 2019, midnight 6.9 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.28 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 14, 2019, 11 p.m. 6.5 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.29 ppb (3) N/A 1.0 μg/m3 (4) 27.0
 
Jan. 14, 2019, 10 p.m. 7.1 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 14, 2019, 9 p.m. 9.9 ppb (9) 3.2 ppb (3) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.3 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 14, 2019, 8 p.m. 21.5 ppb (20) 6.9 ppb (6) N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) 0.43 ppb (5) N/A N/A 20.0
 
Jan. 14, 2019, 7 p.m. 34.6 ppb (32) 12.7 ppb (12) N/A 22.0 ppb (20) N/A N/A 10.0 ppb (8) 0.56 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 14, 2019, 6 p.m. 42.1 ppb (39) 21.9 ppb (20) N/A 20.0 ppb (19) N/A N/A 8.0 ppb (6) 0.59 ppb (7) N/A 32.0 μg/m3 (93) 93.0
 
Jan. 14, 2019, 5 p.m. 88.4 ppb (87) 65.3 ppb (62) N/A 23.0 ppb (21) N/A N/A 1.0 ppb (1) 1.19 ppb (13) N/A N/A 87.0
 
Jan. 14, 2019, 4 p.m. 67.1 ppb (64) 48.3 ppb (45) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) 0.91 ppb (10) N/A 8.0 μg/m3 (33) 64.0
 
Jan. 14, 2019, 3 p.m. 103.7 ppb (101) 83.9 ppb (82) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 1.22 ppb (14) N/A 9.0 μg/m3 (38) 101.0
 
Jan. 14, 2019, 2 p.m. 47.2 ppb (44) 31.5 ppb (29) N/A 16.0 ppb (15) N/A N/A 0.0 ppb (0) 0.7 ppb (8) N/A 8.0 μg/m3 (33) 44.0
 
Jan. 14, 2019, 1 p.m. 29.4 ppb (27) 17.2 ppb (16) N/A 12.0 ppb (11) N/A N/A 0.0 ppb (0) 0.6 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, noon 22.5 ppb (21) 11.2 ppb (10) N/A 11.0 ppb (10) N/A N/A 0.0 ppb (0) 0.5 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 14, 2019, 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. 14, 2019, 10 a.m. 16.0 ppb (15) 5.3 ppb (5) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 9 a.m. 16.8 ppb (16) 5.3 ppb (5) N/A 12.0 ppb (11) N/A N/A 1.0 ppb (1) 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2019, 8 a.m. 24.1 ppb (22) 11.5 ppb (11) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.54 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 7 a.m. 25.8 ppb (24) 11.1 ppb (10) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) 0.59 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 14, 2019, 6 a.m. 30.5 ppb (28) 15.6 ppb (14) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) 0.65 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 5 a.m. 39.7 ppb (37) 24.5 ppb (23) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) 0.78 ppb (9) N/A 30.0 μg/m3 (88) 88.0
 
Jan. 14, 2019, 4 a.m. 47.7 ppb (44) 30.6 ppb (28) N/A 17.0 ppb (16) N/A N/A 1.0 ppb (1) 0.77 ppb (9) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 14, 2019, 3 a.m. 51.9 ppb (48) 32.7 ppb (30) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) 0.96 ppb (11) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 14, 2019, 2 a.m. 51.3 ppb (48) 26.5 ppb (25) N/A 25.0 ppb (23) N/A N/A 1.0 ppb (1) 1.01 ppb (11) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 14, 2019, 1 a.m. 35.2 ppb (33) 9.2 ppb (9) N/A 26.0 ppb (24) N/A N/A 6.0 ppb (5) 0.75 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, midnight 14.3 ppb (13) 1.3 ppb (1) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) 0.45 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 13, 2019, 11 p.m. 10.7 ppb (10) 1.7 ppb (2) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.35 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 10 p.m. 11.1 ppb (10) 2.6 ppb (2) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) 0.35 ppb (4) N/A 22.0 μg/m3 (71) 71.0
 
Jan. 13, 2019, 9 p.m. 13.0 ppb (12) 3.2 ppb (3) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.34 ppb (4) N/A N/A 22.0
 
Jan. 13, 2019, 8 p.m. 12.0 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.35 ppb (4) N/A 27.0 μg/m3 (82) 82.0
 
Jan. 13, 2019, 7 p.m. 16.0 ppb (15) 4.8 ppb (4) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.4 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 6 p.m. 18.4 ppb (17) 6.6 ppb (6) N/A 12.0 ppb (11) N/A N/A 17.0 ppb (13) 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 5 p.m. 24.3 ppb (23) 11.3 ppb (10) N/A 13.0 ppb (12) N/A N/A 9.0 ppb (7) 0.48 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 4 p.m. 30.5 ppb (28) 17.8 ppb (16) N/A 13.0 ppb (12) N/A N/A 3.0 ppb (2) 0.61 ppb (7) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 13, 2019, 3 p.m. 43.4 ppb (40) 30.4 ppb (28) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.63 ppb (7) N/A 4.0 μg/m3 (17) 40.0
 
Jan. 13, 2019, 2 p.m. 23.1 ppb (21) 12.4 ppb (11) N/A 11.0 ppb (10) N/A N/A 0.0 ppb (0) 0.48 ppb (5) N/A 3.0 μg/m3 (12) 21.0
 
Jan. 13, 2019, 1 p.m. 20.7 ppb (19) 8.0 ppb (7) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.4 ppb (4) N/A 3.0 μg/m3 (12) 19.0
 
Jan. 13, 2019, noon 18.1 ppb (17) 5.1 ppb (5) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.38 ppb (4) N/A 2.0 μg/m3 (8) 17.0
 
Jan. 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 13, 2019, 10 a.m. 19.3 ppb (18) 7.6 ppb (7) N/A 12.0 ppb (11) N/A N/A 1.0 ppb (1) 0.45 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 9 a.m. 24.3 ppb (23) 11.7 ppb (11) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.49 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 8 a.m. 24.5 ppb (23) 9.3 ppb (9) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) 0.53 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 7 a.m. 26.5 ppb (25) 7.3 ppb (7) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) 0.59 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 13, 2019, 6 a.m. 29.3 ppb (27) 5.9 ppb (5) N/A 23.0 ppb (21) N/A N/A 3.0 ppb (2) 0.69 ppb (8) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 13, 2019, 5 a.m. 34.2 ppb (32) 11.4 ppb (11) N/A 23.0 ppb (21) N/A N/A 10.0 ppb (8) 0.83 ppb (9) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 13, 2019, 4 a.m. 14.8 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.46 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 3 a.m. 8.5 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 2 a.m. 5.1 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 29.0
 
Jan. 13, 2019, 1 a.m. 5.9 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) 0.32 ppb (4) N/A -1.0 μg/m3 (0) 28.0
 
Jan. 13, 2019, midnight 3.6 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
Jan. 12, 2019, 11 p.m. 8.6 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 10 p.m. 13.3 ppb (12) 4.4 ppb (4) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.47 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 12, 2019, 9 p.m. 14.1 ppb (13) 4.3 ppb (4) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.4 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 12, 2019, 8 p.m. 17.2 ppb (16) 7.4 ppb (7) N/A 10.0 ppb (9) N/A N/A 20.0 ppb (15) 0.41 ppb (5) N/A 37.0 μg/m3 (104) 104.0
 
Jan. 12, 2019, 7 p.m. 23.0 ppb (21) 12.0 ppb (11) N/A 11.0 ppb (10) N/A N/A 17.0 ppb (13) 0.38 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 6 p.m. 21.5 ppb (20) 9.6 ppb (9) N/A 12.0 ppb (11) N/A N/A 15.0 ppb (12) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 12, 2019, 5 p.m. 43.2 ppb (40) 27.2 ppb (25) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) 0.83 ppb (9) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 12, 2019, 4 p.m. 62.7 ppb (59) 41.4 ppb (38) N/A 21.0 ppb (19) N/A N/A 1.0 ppb (1) 0.76 ppb (8) N/A 13.0 μg/m3 (52) 59.0
 
Jan. 12, 2019, 3 p.m. 54.4 ppb (50) 35.7 ppb (33) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) 0.66 ppb (7) N/A 11.0 μg/m3 (46) 50.0
 
Jan. 12, 2019, 2 p.m. 27.2 ppb (25) 9.2 ppb (9) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) 0.48 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 1 p.m. 13.6 ppb (13) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A 8.0 ppb (6) 0.36 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 12, 2019, noon 24.8 ppb (23) 4.3 ppb (4) N/A 21.0 ppb (19) N/A N/A 3.0 ppb (2) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 12, 2019, 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 (0) N/A
Jan. 12, 2019, 10 a.m. 11.8 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 13.0 ppb (10) 0.42 ppb (5) N/A N/A 11.0
 
Jan. 12, 2019, 9 a.m. 13.1 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 9.0 ppb (7) 0.41 ppb (5) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 12, 2019, 8 a.m. 18.9 ppb (18) 1.9 ppb (2) N/A 17.0 ppb (16) N/A N/A 6.0 ppb (5) 0.48 ppb (5) N/A 4.0 μg/m3 (17) 18.0
 
Jan. 12, 2019, 7 a.m. 12.7 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.39 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, 6 a.m. 10.7 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.41 ppb (5) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 12, 2019, 5 a.m. 10.9 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) 0.38 ppb (4) N/A -2.0 μg/m3 (0) 14.0
 
Jan. 12, 2019, 4 a.m. 16.5 ppb (15) 1.3 ppb (1) N/A 15.0 ppb (14) N/A N/A 14.0 ppb (11) 0.42 ppb (5) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 12, 2019, 3 a.m. 42.5 ppb (39) 16.3 ppb (15) N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.72 ppb (8) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 12, 2019, 2 a.m. 38.4 ppb (36) 11.6 ppb (11) N/A 27.0 ppb (25) N/A N/A 1.0 ppb (1) 0.65 ppb (7) N/A 1.0 μg/m3 (4) 36.0
 
Jan. 12, 2019, 1 a.m. 33.4 ppb (31) 9.0 ppb (8) N/A 24.0 ppb (22) N/A N/A 2.0 ppb (2) 0.53 ppb (6) N/A 0.0 μg/m3 (0) 31.0
 
Jan. 12, 2019, midnight 24.8 ppb (23) 5.1 ppb (5) N/A 20.0 ppb (19) N/A N/A 8.0 ppb (6) 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 11, 2019, 11 p.m. 28.2 ppb (26) 7.7 ppb (7) N/A 20.0 ppb (19) N/A N/A 7.0 ppb (5) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 10 p.m. 32.5 ppb (30) 11.4 ppb (11) N/A 21.0 ppb (19) N/A N/A 8.0 ppb (6) 0.56 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 11, 2019, 9 p.m. 30.9 ppb (29) 10.7 ppb (10) N/A 20.0 ppb (19) N/A N/A 10.0 ppb (8) 0.52 ppb (6) N/A 33.0 μg/m3 (95) 95.0
 
Jan. 11, 2019, 8 p.m. 38.6 ppb (36) 16.3 ppb (15) N/A 22.0 ppb (20) N/A N/A 7.0 ppb (5) 0.6 ppb (7) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 11, 2019, 7 p.m. 37.4 ppb (35) 16.8 ppb (16) N/A 21.0 ppb (19) N/A N/A 7.0 ppb (5) 0.56 ppb (6) N/A 28.0 μg/m3 (84) 84.0
 
Jan. 11, 2019, 6 p.m. 48.8 ppb (45) 24.5 ppb (23) N/A 24.0 ppb (22) N/A N/A 3.0 ppb (2) 0.65 ppb (7) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 11, 2019, 5 p.m. 130.5 ppb (106) 103.0 ppb (100) N/A 28.0 ppb (26) N/A N/A 1.0 ppb (1) 1.39 ppb (15) N/A 18.0 μg/m3 (63) 106.0
 
Jan. 11, 2019, 4 p.m. 146.1 ppb (109) 121.5 ppb (104) N/A 25.0 ppb (23) N/A N/A 1.0 ppb (1) 1.82 ppb (20) N/A 18.0 μg/m3 (63) 109.0
 
Jan. 11, 2019, 3 p.m. 101.7 ppb (100) 83.7 ppb (82) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) 1.35 ppb (15) N/A 9.0 μg/m3 (38) 100.0
 
Jan. 11, 2019, 2 p.m. 64.4 ppb (61) 52.9 ppb (49) N/A 12.0 ppb (11) N/A N/A 0.0 ppb (0) 0.92 ppb (10) N/A 5.0 μg/m3 (21) 61.0
 
Jan. 11, 2019, 1 p.m. 34.2 ppb (32) 23.8 ppb (22) N/A 10.0 ppb (9) N/A N/A 0.0 ppb (0) 0.55 ppb (6) N/A 7.0 μg/m3 (29) 32.0
 
Jan. 11, 2019, noon 23.6 ppb (22) 14.8 ppb (14) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.46 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 11, 2019, 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. 11, 2019, 10 a.m. 19.8 ppb (18) 10.5 ppb (10) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 11, 2019, 9 a.m. 27.8 ppb (26) 18.5 ppb (17) N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) 0.46 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 8 a.m. 27.5 ppb (25) 16.2 ppb (15) N/A 11.0 ppb (10) N/A N/A 0.0 ppb (0) 0.51 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 11, 2019, 7 a.m. 26.4 ppb (24) 13.5 ppb (12) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.53 ppb (6) N/A 1.0 μg/m3 (4) 24.0
 
Jan. 11, 2019, 6 a.m. 48.1 ppb (45) 36.3 ppb (34) N/A 12.0 ppb (11) N/A N/A 1.0 ppb (1) 0.76 ppb (8) N/A 5.0 μg/m3 (21) 45.0
 
Jan. 11, 2019, 5 a.m. 32.2 ppb (30) 19.5 ppb (18) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.59 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 4 a.m. 27.7 ppb (26) 13.9 ppb (13) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) 0.51 ppb (6) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 11, 2019, 3 a.m. 52.7 ppb (49) 31.6 ppb (29) N/A 21.0 ppb (19) N/A N/A 1.0 ppb (1) 0.77 ppb (9) N/A 8.0 μg/m3 (33) 49.0
 
Jan. 11, 2019, 2 a.m. 39.9 ppb (37) 8.7 ppb (8) N/A 31.0 ppb (29) N/A N/A 4.0 ppb (3) 0.56 ppb (6) N/A 6.0 μg/m3 (25) 37.0
 
Jan. 11, 2019, 1 a.m. 22.2 ppb (21) 1.8 ppb (2) N/A 20.0 ppb (19) N/A N/A 15.0 ppb (12) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 11, 2019, midnight 19.1 ppb (18) 3.1 ppb (3) N/A 16.0 ppb (15) N/A N/A 18.0 ppb (14) 0.36 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 10, 2019, 11 p.m. 16.4 ppb (15) 4.2 ppb (4) N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) 0.37 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 10, 2019, 10 p.m. 16.6 ppb (15) 5.4 ppb (5) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.49 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 10, 2019, 9 p.m. 27.1 ppb (25) 12.4 ppb (11) N/A 15.0 ppb (14) N/A N/A 14.0 ppb (11) 0.47 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 10, 2019, 8 p.m. 27.9 ppb (26) 12.9 ppb (12) N/A 15.0 ppb (14) N/A N/A 14.0 ppb (11) 0.5 ppb (6) N/A 30.0 μg/m3 (88) 88.0
 
Jan. 10, 2019, 7 p.m. 36.3 ppb (34) 18.7 ppb (17) N/A 18.0 ppb (17) N/A N/A 9.0 ppb (7) 0.63 ppb (7) N/A 26.0 μg/m3 (80) 80.0
 
Jan. 10, 2019, 6 p.m. 23.2 ppb (21) 10.3 ppb (10) N/A 13.0 ppb (12) N/A N/A 11.0 ppb (8) 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 10, 2019, 5 p.m. 23.7 ppb (22) 9.9 ppb (9) N/A 14.0 ppb (13) N/A N/A 7.0 ppb (5) 0.44 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2019, 4 p.m. 54.6 ppb (51) 36.7 ppb (34) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) 0.74 ppb (8) N/A 7.0 μg/m3 (29) 51.0
 
Jan. 10, 2019, 3 p.m. 107.3 ppb (101) 91.0 ppb (89) N/A 16.0 ppb (15) N/A N/A 1.0 ppb (1) 1.42 ppb (16) N/A 9.0 μg/m3 (38) 101.0
 
Jan. 10, 2019, 2 p.m. 66.8 ppb (64) 54.1 ppb (50) N/A 13.0 ppb (12) N/A N/A 0.0 ppb (0) 0.64 ppb (7) N/A 4.0 μg/m3 (17) 64.0
 
Jan. 10, 2019, 1 p.m. 27.7 ppb (26) 18.8 ppb (17) N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) 0.45 ppb (5) N/A -3.0 μg/m3 (0) 26.0
 
Jan. 10, 2019, noon 23.5 ppb (22) 14.2 ppb (13) N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) 0.46 ppb (5) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 10, 2019, 11 a.m. 23.5 ppb (22) 13.0 ppb (12) N/A 11.0 ppb (10) N/A N/A 0.0 ppb (0) 0.41 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 10, 2019, 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. 10, 2019, 9 a.m. 19.6 ppb (18) 6.4 ppb (6) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.45 ppb (5) N/A 2.0 μg/m3 (8) 18.0
 
Jan. 10, 2019, 8 a.m. 25.8 ppb (24) 8.3 ppb (8) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) 0.54 ppb (6) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 10, 2019, 7 a.m. 29.4 ppb (27) 9.3 ppb (9) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.54 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 10, 2019, 6 a.m. 47.2 ppb (44) 22.5 ppb (21) N/A 25.0 ppb (23) N/A N/A 1.0 ppb (1) 0.71 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 10, 2019, 5 a.m. 47.6 ppb (44) 20.7 ppb (19) N/A 27.0 ppb (25) N/A N/A 2.0 ppb (2) 0.68 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 10, 2019, 4 a.m. 29.0 ppb (27) 4.8 ppb (4) N/A 24.0 ppb (22) N/A N/A 7.0 ppb (5) 0.46 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 10, 2019, 3 a.m. 17.2 ppb (16) 2.2 ppb (2) N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) 0.45 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 10, 2019, 2 a.m. 10.3 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.34 ppb (4) N/A 0.0 μg/m3 (0) 21.0
 
Jan. 10, 2019, 1 a.m. 6.3 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.3 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 10, 2019, midnight 7.0 ppb (6) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 9, 2019, 11 p.m. 8.5 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 9, 2019, 10 p.m. 6.5 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 9, 2019, 9 p.m. 5.0 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 9, 2019, 8 p.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 9, 2019, 7 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. 9, 2019, 6 p.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. 9, 2019, 5 p.m. 16.0 ppb (15) 3.5 ppb (3) N/A 13.0 ppb (12) N/A N/A 23.0 ppb (18) 0.49 ppb (5) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 9, 2019, 4 p.m. 16.7 ppb (15) 3.2 ppb (3) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.54 ppb (6) N/A 1.0 μg/m3 (4) 18.0
 
Jan. 9, 2019, 3 p.m. 25.1 ppb (23) 8.4 ppb (8) N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.53 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 9, 2019, 2 p.m. 19.5 ppb (18) 7.4 ppb (7) N/A 12.0 ppb (11) N/A N/A 24.0 ppb (18) 0.36 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 9, 2019, 1 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.3 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 9, 2019, noon 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.31 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 9, 2019, 10 a.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.3 ppb (3) N/A N/A 25.0
 
Jan. 9, 2019, 9 a.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 27.0