AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

Location: Pleasanton (Arthur H. Breed Junior Fwy), CA

Reporting: True, Located: True

Current AQI: 8.0

Pleasanton (Arthur H. Breed Junior Fwy) CA, US: 37.701222, -121.903019

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 22, 2019, 10 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. 22, 2019, 9 a.m. 19.4 ppb (18) 5.1 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.38 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 22, 2019, 8 a.m. 16.2 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2019, 7 a.m. 18.5 ppb (17) 3.2 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, 6 a.m. 16.7 ppb (15) 1.8 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2019, 5 a.m. 20.8 ppb (19) 2.7 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 4 a.m. 35.1 ppb (32) 9.5 ppb (9) N/A 26.0 ppb (24) N/A N/A N/A 0.6 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 3 a.m. 39.1 ppb (36) 16.2 ppb (15) N/A 23.0 ppb (21) N/A N/A N/A 0.72 ppb (8) N/A 4.0 μg/m3 (17) 36.0
 
Jan. 22, 2019, 2 a.m. 60.3 ppb (57) 28.6 ppb (26) N/A 32.0 ppb (30) N/A N/A N/A 0.94 ppb (10) N/A 5.0 μg/m3 (21) 57.0
 
Jan. 22, 2019, 1 a.m. 41.3 ppb (38) 17.5 ppb (16) N/A 24.0 ppb (22) N/A N/A N/A 0.55 ppb (6) N/A 2.0 μg/m3 (8) 38.0
 
Jan. 22, 2019, midnight 35.9 ppb (33) 15.9 ppb (15) N/A 20.0 ppb (19) N/A N/A N/A 0.43 ppb (5) N/A 0.0 μg/m3 (0) 33.0
 
Jan. 21, 2019, 11 p.m. 38.7 ppb (36) 17.7 ppb (16) N/A 21.0 ppb (19) N/A N/A N/A 0.47 ppb (5) N/A 2.0 μg/m3 (8) 36.0
 
Jan. 21, 2019, 10 p.m. 41.2 ppb (38) 19.9 ppb (18) N/A 21.0 ppb (19) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (12) 38.0
 
Jan. 21, 2019, 9 p.m. 10.6 ppb (10) 4.1 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (8) 10.0
 
Jan. 21, 2019, 8 p.m. 28.0 ppb (26) 12.9 ppb (12) N/A 15.0 ppb (14) N/A N/A N/A 0.36 ppb (4) N/A 3.0 μg/m3 (12) 26.0
 
Jan. 21, 2019, 7 p.m. 23.6 ppb (22) 10.2 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 21, 2019, 6 p.m. 37.0 ppb (34) 16.9 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 34.0
 
Jan. 21, 2019, 5 p.m. 40.4 ppb (37) 18.4 ppb (17) N/A 22.0 ppb (20) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 37.0
 
Jan. 21, 2019, 4 p.m. 50.3 ppb (47) 23.4 ppb (22) N/A 27.0 ppb (25) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 47.0
 
Jan. 21, 2019, 3 p.m. 55.5 ppb (52) 23.6 ppb (22) N/A 32.0 ppb (30) N/A N/A N/A 0.57 ppb (6) N/A 4.0 μg/m3 (17) 52.0
 
Jan. 21, 2019, 2 p.m. 62.2 ppb (59) 25.3 ppb (23) N/A 37.0 ppb (34) N/A N/A N/A 0.53 ppb (6) N/A 3.0 μg/m3 (12) 59.0
 
Jan. 21, 2019, 1 p.m. 19.9 ppb (18) 3.9 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, noon 15.0 ppb (14) 1.9 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 21, 2019, 11 a.m. 11.1 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 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. 21, 2019, 9 a.m. 7.7 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 8 a.m. 6.0 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 7 a.m. 12.8 ppb (12) 3.1 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 6 a.m. 12.7 ppb (12) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 5 a.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 4 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 21, 2019, 3 a.m. 8.5 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 2 a.m. 9.3 ppb (9) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 2.0 μg/m3 (8) 9.0
 
Jan. 21, 2019, 1 a.m. 3.1 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.25 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Jan. 21, 2019, midnight 3.2 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A -2.0 μg/m3 (0) 3.0
 
Jan. 20, 2019, 11 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 20, 2019, 10 p.m. 5.6 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (3) N/A -1.0 μg/m3 (0) 5.0
 
Jan. 20, 2019, 9 p.m. 4.0 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A -3.0 μg/m3 (0) 4.0
 
Jan. 20, 2019, 8 p.m. 5.0 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 0.0 μg/m3 (0) 5.0
 
Jan. 20, 2019, 7 p.m. 5.3 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 5.0
 
Jan. 20, 2019, 6 p.m. 4.2 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 0.0 μg/m3 (0) 4.0
 
Jan. 20, 2019, 5 p.m. 4.7 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.26 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 20, 2019, 4 p.m. 7.8 ppb (7) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 1.0 μg/m3 (4) 7.0
 
Jan. 20, 2019, 3 p.m. 15.8 ppb (15) 6.1 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.47 ppb (5) N/A 2.0 μg/m3 (8) 15.0
 
Jan. 20, 2019, 2 p.m. 26.6 ppb (25) 14.2 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.6 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 1 p.m. 19.1 ppb (18) 7.4 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.49 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, noon 20.9 ppb (19) 9.9 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 11 a.m. 18.4 ppb (17) 6.9 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.48 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 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. 20, 2019, 9 a.m. 16.9 ppb (16) 4.6 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 8 a.m. 22.9 ppb (21) 9.2 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.61 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 7 a.m. 22.2 ppb (21) 7.4 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.56 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 20, 2019, 6 a.m. 25.4 ppb (24) 8.1 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.59 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 20, 2019, 5 a.m. 34.9 ppb (32) 16.3 ppb (15) N/A 19.0 ppb (18) N/A N/A N/A 0.95 ppb (11) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2019, 4 a.m. 34.5 ppb (32) 15.6 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.91 ppb (10) N/A 7.0 μg/m3 (29) 32.0
 
Jan. 20, 2019, 3 a.m. 15.1 ppb (14) 3.7 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 2 a.m. 17.1 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (4) 16.0
 
Jan. 20, 2019, 1 a.m. 11.9 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A 0.0 μg/m3 (0) 11.0
 
Jan. 20, 2019, midnight 10.1 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 1.0 μg/m3 (4) 9.0
 
Jan. 19, 2019, 11 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 1.0 μg/m3 (4) 8.0
 
Jan. 19, 2019, 10 p.m. 21.0 ppb (19) 9.1 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.57 ppb (6) N/A 2.0 μg/m3 (8) 19.0
 
Jan. 19, 2019, 9 p.m. 22.3 ppb (21) 9.8 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 21.0
 
Jan. 19, 2019, 8 p.m. 34.7 ppb (32) 17.0 ppb (16) N/A 18.0 ppb (17) N/A N/A N/A 0.77 ppb (9) N/A 5.0 μg/m3 (21) 32.0
 
Jan. 19, 2019, 7 p.m. 45.1 ppb (42) 25.6 ppb (24) N/A 20.0 ppb (19) N/A N/A N/A 0.99 ppb (11) N/A 9.0 μg/m3 (38) 42.0
 
Jan. 19, 2019, 6 p.m. 39.4 ppb (36) 22.5 ppb (21) N/A 17.0 ppb (16) N/A N/A N/A 0.81 ppb (9) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 5 p.m. 30.3 ppb (28) 15.7 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A 0.58 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 4 p.m. 48.9 ppb (45) 31.4 ppb (29) N/A 18.0 ppb (17) N/A N/A N/A 0.87 ppb (10) N/A 6.0 μg/m3 (25) 45.0
 
Jan. 19, 2019, 3 p.m. 32.1 ppb (30) 16.2 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.66 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 2 p.m. 38.8 ppb (36) 20.4 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.69 ppb (8) N/A 7.0 μg/m3 (29) 36.0
 
Jan. 19, 2019, 1 p.m. 26.1 ppb (24) 9.7 ppb (9) N/A 16.0 ppb (15) N/A N/A N/A 0.49 ppb (5) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 19, 2019, noon 7.5 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2019, 11 a.m. 8.0 ppb (7) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2019, 10 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. 19, 2019, 9 a.m. 14.8 ppb (14) 2.9 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 8 a.m. 21.5 ppb (20) 7.4 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2019, 7 a.m. 29.2 ppb (27) 12.0 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A 0.55 ppb (6) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 19, 2019, 6 a.m. 31.5 ppb (29) 13.2 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.61 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 5 a.m. 39.4 ppb (36) 17.4 ppb (16) N/A 22.0 ppb (20) N/A N/A N/A 0.8 ppb (9) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 4 a.m. 31.1 ppb (29) 9.8 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A 0.6 ppb (7) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 19, 2019, 3 a.m. 31.4 ppb (29) 11.3 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.56 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 2 a.m. 18.6 ppb (17) 2.1 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 1 a.m. 41.2 ppb (38) 16.7 ppb (15) N/A 25.0 ppb (23) N/A N/A N/A 0.55 ppb (6) N/A 6.0 μg/m3 (25) 38.0
 
Jan. 19, 2019, midnight 17.1 ppb (16) 6.2 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 16.0
 
Jan. 18, 2019, 11 p.m. 8.1 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 1.0 μg/m3 (4) 8.0
 
Jan. 18, 2019, 10 p.m. 18.4 ppb (17) 7.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.29 ppb (3) N/A 2.0 μg/m3 (8) 17.0
 
Jan. 18, 2019, 9 p.m. 16.7 ppb (15) 5.5 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 8 p.m. 53.0 ppb (49) 25.7 ppb (24) N/A 27.0 ppb (25) N/A N/A N/A 0.6 ppb (7) N/A 8.0 μg/m3 (33) 49.0
 
Jan. 18, 2019, 7 p.m. 51.5 ppb (48) 26.5 ppb (25) N/A 25.0 ppb (23) N/A N/A N/A 0.56 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 6 p.m. 21.6 ppb (20) 7.7 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, 5 p.m. 29.3 ppb (27) 14.5 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 4 p.m. 81.2 ppb (79) 55.7 ppb (52) N/A 26.0 ppb (24) N/A N/A N/A 0.87 ppb (10) N/A 15.0 μg/m3 (56) 79.0
 
Jan. 18, 2019, 3 p.m. 44.9 ppb (42) 22.8 ppb (21) N/A 22.0 ppb (20) N/A N/A N/A 0.65 ppb (7) N/A 6.0 μg/m3 (25) 42.0
 
Jan. 18, 2019, 2 p.m. 66.2 ppb (63) 40.0 ppb (37) N/A 26.0 ppb (24) N/A N/A N/A 0.68 ppb (8) N/A 10.0 μg/m3 (42) 63.0
 
Jan. 18, 2019, 1 p.m. 48.2 ppb (45) 25.7 ppb (24) N/A 23.0 ppb (21) N/A N/A N/A 0.58 ppb (6) N/A 10.0 μg/m3 (42) 45.0
 
Jan. 18, 2019, noon 21.3 ppb (20) 4.2 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 11 a.m. 23.9 ppb (22) 7.4 ppb (7) N/A 17.0 ppb (16) N/A N/A N/A 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 10 a.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. 18, 2019, 9 a.m. 22.7 ppb (21) 5.6 ppb (5) N/A 17.0 ppb (16) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, 8 a.m. 23.5 ppb (22) 6.2 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.48 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, 7 a.m. 15.7 ppb (15) 3.9 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, 6 a.m. 8.5 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 5 a.m. 7.6 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 4 a.m. 7.1 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 3 a.m. 7.1 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 2 a.m. 6.5 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 1 a.m. 9.8 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, midnight 6.6 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 11 p.m. 6.7 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 10 p.m. 4.3 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 9 p.m. 7.9 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 17, 2019, 8 p.m. 5.9 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 7 p.m. 5.3 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 6 p.m. 6.2 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 5 p.m. 5.2 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 4 p.m. 4.8 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 3 p.m. 5.1 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 2 p.m. 6.5 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 1 p.m. 3.6 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, noon 3.2 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 11 a.m. 2.4 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 10 a.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. 17, 2019, 9 a.m. 2.3 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 8 a.m. 1.8 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 7 a.m. 1.7 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.3 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Jan. 17, 2019, 6 a.m. 2.2 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.31 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Jan. 17, 2019, 5 a.m. 2.2 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.32 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2019, 4 a.m. 2.3 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 17, 2019, 3 a.m. 2.5 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, 2 a.m. 2.6 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, 1 a.m. 3.0 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, midnight 3.3 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 11 p.m. 3.9 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 0.0 μg/m3 (0) 4.0
 
Jan. 16, 2019, 10 p.m. 4.3 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2019, 9 p.m. 3.6 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 8 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
Jan. 16, 2019, 7 p.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 6 p.m. 4.3 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.28 ppb (3) N/A N/A 4.0
 
Jan. 16, 2019, 5 p.m. 5.1 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2019, 4 p.m. 25.8 ppb (24) 8.0 ppb (7) N/A 18.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 1.0 μg/m3 (4) 24.0
 
Jan. 16, 2019, 3 p.m. 28.0 ppb (26) 8.5 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.59 ppb (7) N/A -2.0 μg/m3 (0) 26.0
 
Jan. 16, 2019, 2 p.m. 4.8 ppb (4) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A -1.0 μg/m3 (0) 4.0
 
Jan. 16, 2019, 1 p.m. 3.7 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, noon 3.3 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 11 a.m. 12.5 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 0.0 μg/m3 (0) 12.0
 
Jan. 16, 2019, 10 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. 16, 2019, 9 a.m. 2.8 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 8 a.m. 3.2 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 7 a.m. 3.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 16, 2019, 6 a.m. 8.1 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2019, 5 a.m. 3.9 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 4 a.m. 3.0 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 3 a.m. 4.0 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2019, 2 a.m. 24.2 ppb (22) 6.4 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 16, 2019, 1 a.m. 46.1 ppb (43) 22.1 ppb (20) N/A 24.0 ppb (22) N/A N/A N/A 0.69 ppb (8) N/A 4.0 μg/m3 (17) 43.0
 
Jan. 16, 2019, midnight 15.1 ppb (14) 3.2 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.38 ppb (4) N/A 1.0 μg/m3 (4) 14.0
 
Jan. 15, 2019, 11 p.m. 39.6 ppb (37) 18.9 ppb (18) N/A 21.0 ppb (19) N/A N/A N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 37.0
 
Jan. 15, 2019, 10 p.m. 34.3 ppb (32) 15.4 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 9 p.m. 49.8 ppb (46) 26.7 ppb (25) N/A 23.0 ppb (21) N/A N/A N/A 0.49 ppb (5) N/A 10.0 μg/m3 (42) 46.0
 
Jan. 15, 2019, 8 p.m. 54.7 ppb (51) 28.2 ppb (26) N/A 27.0 ppb (25) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (33) 51.0
 
Jan. 15, 2019, 7 p.m. 54.5 ppb (51) 27.9 ppb (26) N/A 27.0 ppb (25) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (12) 51.0
 
Jan. 15, 2019, 6 p.m. 63.8 ppb (60) 33.5 ppb (31) N/A 30.0 ppb (28) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 60.0
 
Jan. 15, 2019, 5 p.m. 47.5 ppb (44) 21.1 ppb (20) N/A 26.0 ppb (24) N/A N/A N/A 0.53 ppb (6) N/A 2.0 μg/m3 (8) 44.0
 
Jan. 15, 2019, 4 p.m. 27.1 ppb (25) 7.7 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.52 ppb (6) N/A 2.0 μg/m3 (8) 25.0
 
Jan. 15, 2019, 3 p.m. 20.4 ppb (19) 4.5 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 19.0
 
Jan. 15, 2019, 2 p.m. 14.7 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 2.0 μg/m3 (8) 14.0
 
Jan. 15, 2019, 1 p.m. 59.3 ppb (56) 29.6 ppb (27) N/A 30.0 ppb (28) N/A N/A N/A 0.59 ppb (7) N/A 4.0 μg/m3 (17) 56.0
 
Jan. 15, 2019, noon 74.3 ppb (72) 45.8 ppb (42) N/A 29.0 ppb (27) N/A N/A N/A 0.64 ppb (7) N/A 7.0 μg/m3 (29) 72.0
 
Jan. 15, 2019, 11 a.m. 42.7 ppb (40) 20.2 ppb (19) N/A 23.0 ppb (21) N/A N/A N/A 0.46 ppb (5) N/A 8.0 μg/m3 (33) 40.0