AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

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

Reporting: True, Located: True

Current AQI: 18.0

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
July 16, 2019, 3 a.m. 19.4 ppb (18) 10.0 ppb (9) N/A 9.0 ppb (8) N/A N/A N/A 0.62 ppb (7) N/A 3.0 μg/m3 (12) 18.0
 
July 16, 2019, 2 a.m. 15.8 ppb (15) 8.2 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.63 ppb (7) N/A 1.0 μg/m3 (4) 15.0
 
July 16, 2019, 1 a.m. 20.7 ppb (19) 11.7 ppb (11) N/A 9.0 ppb (8) N/A N/A N/A 0.64 ppb (7) N/A 3.0 μg/m3 (12) 19.0
 
July 16, 2019, midnight 23.6 ppb (22) 13.7 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A 0.58 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 11 p.m. 26.9 ppb (25) 15.4 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.62 ppb (7) N/A 4.0 μg/m3 (17) 25.0
 
July 15, 2019, 10 p.m. 27.7 ppb (26) 14.5 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.56 ppb (6) N/A 6.0 μg/m3 (25) 26.0
 
July 15, 2019, 9 p.m. 28.3 ppb (26) 14.0 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.57 ppb (6) N/A 4.0 μg/m3 (17) 26.0
 
July 15, 2019, 8 p.m. 23.7 ppb (22) 10.6 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (12) 22.0
 
July 15, 2019, 7 p.m. 20.1 ppb (19) 9.0 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A 0.45 ppb (5) N/A 3.0 μg/m3 (12) 19.0
 
July 15, 2019, 6 p.m. 36.6 ppb (34) 17.9 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.53 ppb (6) N/A N/A 34.0
 
July 15, 2019, 5 p.m. 31.2 ppb (29) 14.7 ppb (14) N/A 17.0 ppb (16) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 4 p.m. 40.6 ppb (38) 23.0 ppb (21) N/A 18.0 ppb (17) N/A N/A N/A 0.47 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
July 15, 2019, 3 p.m. 24.5 ppb (23) 11.1 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 2 p.m. 23.7 ppb (22) 10.1 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 1 p.m. 52.4 ppb (49) 33.7 ppb (31) N/A 19.0 ppb (18) N/A N/A N/A 0.7 ppb (8) N/A 7.0 μg/m3 (29) 49.0
 
July 15, 2019, noon 43.0 ppb (40) 25.1 ppb (23) N/A 18.0 ppb (17) N/A N/A N/A 0.62 ppb (7) N/A 6.0 μg/m3 (25) 40.0
 
July 15, 2019, 11 a.m. 28.5 ppb (26) 15.1 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A 0.52 ppb (6) N/A 6.0 μg/m3 (25) 26.0
 
July 15, 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
 
July 15, 2019, 9 a.m. 16.2 ppb (15) 3.3 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.38 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 15, 2019, 8 a.m. 15.0 ppb (14) 2.3 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A 0.39 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 15, 2019, 7 a.m. 12.3 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.4 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 6 a.m. 10.2 ppb (9) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 5 a.m. 14.6 ppb (14) 3.6 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 4 a.m. 10.0 ppb (9) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
July 15, 2019, 3 a.m. 15.8 ppb (15) 5.2 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.67 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
July 15, 2019, 2 a.m. 16.5 ppb (15) 6.6 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.67 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 15, 2019, 1 a.m. 14.0 ppb (13) 5.3 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.69 ppb (8) N/A 4.0 μg/m3 (17) 17.0
 
July 15, 2019, midnight 14.5 ppb (13) 5.9 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.66 ppb (7) N/A 3.0 μg/m3 (12) 13.0
 
July 14, 2019, 11 p.m. 9.5 ppb (9) 3.3 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.57 ppb (6) N/A 2.0 μg/m3 (8) 9.0
 
July 14, 2019, 10 p.m. 12.1 ppb (11) 4.8 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.64 ppb (7) N/A 1.0 μg/m3 (4) 11.0
 
July 14, 2019, 9 p.m. 12.3 ppb (11) 4.5 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.59 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 14, 2019, 8 p.m. 9.1 ppb (8) 3.3 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.52 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 14, 2019, 7 p.m. 10.2 ppb (9) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
July 14, 2019, 6 p.m. 14.2 ppb (13) 6.4 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.61 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 14, 2019, 5 p.m. 12.9 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.56 ppb (6) N/A 3.0 μg/m3 (12) 12.0
 
July 14, 2019, 4 p.m. 12.7 ppb (12) 6.8 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
July 14, 2019, 3 p.m. 12.5 ppb (12) 6.7 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 2 p.m. 10.4 ppb (10) 5.5 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
July 14, 2019, 1 p.m. 10.2 ppb (9) 4.7 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 14, 2019, noon 8.9 ppb (8) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 14, 2019, 11 a.m. 8.0 ppb (7) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 10 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
 
July 14, 2019, 9 a.m. 6.6 ppb (6) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 8 a.m. 7.3 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 14, 2019, 7 a.m. 8.7 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
July 14, 2019, 6 a.m. 10.3 ppb (10) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 5 a.m. 13.9 ppb (13) 5.5 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.49 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, 4 a.m. 15.9 ppb (15) 5.7 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.54 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 14, 2019, 3 a.m. 15.5 ppb (14) 5.4 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.59 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, 2 a.m. 16.3 ppb (15) 6.6 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.67 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
July 14, 2019, 1 a.m. 17.0 ppb (16) 7.8 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.67 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, midnight 15.6 ppb (14) 6.3 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.63 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 13, 2019, 11 p.m. 16.2 ppb (15) 6.4 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.61 ppb (7) N/A 3.0 μg/m3 (12) 15.0
 
July 13, 2019, 10 p.m. 18.0 ppb (17) 6.8 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.65 ppb (7) N/A 3.0 μg/m3 (12) 17.0
 
July 13, 2019, 9 p.m. 17.6 ppb (16) 6.4 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.66 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
July 13, 2019, 8 p.m. 18.7 ppb (17) 7.7 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.67 ppb (7) N/A 3.0 μg/m3 (12) 17.0
 
July 13, 2019, 7 p.m. 17.6 ppb (16) 7.8 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.63 ppb (7) N/A 3.0 μg/m3 (12) 16.0
 
July 13, 2019, 6 p.m. 17.0 ppb (16) 8.6 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A 0.61 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
July 13, 2019, 5 p.m. 18.2 ppb (17) 10.2 ppb (9) N/A 8.0 ppb (7) N/A N/A N/A 0.56 ppb (6) N/A 3.0 μg/m3 (12) 17.0
 
July 13, 2019, 4 p.m. 21.3 ppb (20) 13.4 ppb (12) N/A 8.0 ppb (7) N/A N/A N/A 0.64 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 13, 2019, 3 p.m. 23.8 ppb (22) 15.2 ppb (14) N/A 9.0 ppb (8) N/A N/A N/A 0.57 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 13, 2019, 2 p.m. 17.9 ppb (17) 10.3 ppb (10) N/A 8.0 ppb (7) N/A N/A N/A 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
July 13, 2019, 1 p.m. 18.8 ppb (17) 9.3 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 13, 2019, noon 18.1 ppb (17) 7.8 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.46 ppb (5) N/A 3.0 μg/m3 (12) 17.0
 
July 13, 2019, 11 a.m. 14.5 ppb (13) 5.5 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.41 ppb (5) N/A 2.0 μg/m3 (8) 13.0
 
July 13, 2019, 10 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
 
July 13, 2019, 9 a.m. 7.4 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 1.0 μg/m3 (4) 7.0
 
July 13, 2019, 8 a.m. 7.7 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
July 13, 2019, 7 a.m. 11.2 ppb (10) 4.2 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, 6 a.m. 15.0 ppb (14) 6.9 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
July 13, 2019, 5 a.m. 17.2 ppb (16) 7.5 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, 4 a.m. 20.1 ppb (19) 9.7 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.48 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, 3 a.m. 19.3 ppb (18) 8.9 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A 0.56 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
July 13, 2019, 2 a.m. 18.1 ppb (17) 8.4 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.6 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 13, 2019, 1 a.m. 22.8 ppb (21) 11.9 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.69 ppb (8) N/A 4.0 μg/m3 (17) 21.0
 
July 13, 2019, midnight 20.7 ppb (19) 9.6 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A 0.6 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
July 12, 2019, 11 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.51 ppb (6) N/A 2.0 μg/m3 (8) 14.0
 
July 12, 2019, 10 p.m. 19.4 ppb (18) 8.5 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A 0.49 ppb (5) N/A 3.0 μg/m3 (12) 18.0
 
July 12, 2019, 9 p.m. 27.9 ppb (26) 12.3 ppb (11) N/A 16.0 ppb (15) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 26.0
 
July 12, 2019, 8 p.m. 34.5 ppb (32) 17.6 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 32.0
 
July 12, 2019, 7 p.m. 36.7 ppb (34) 20.7 ppb (19) N/A 16.0 ppb (15) N/A N/A N/A 0.58 ppb (6) N/A 5.0 μg/m3 (21) 34.0
 
July 12, 2019, 6 p.m. 42.9 ppb (40) 26.6 ppb (25) N/A 16.0 ppb (15) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 40.0
 
July 12, 2019, 5 p.m. 39.7 ppb (37) 25.6 ppb (24) N/A 14.0 ppb (13) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 37.0
 
July 12, 2019, 4 p.m. 28.8 ppb (27) 18.9 ppb (18) N/A 10.0 ppb (9) N/A N/A N/A 0.51 ppb (6) N/A 6.0 μg/m3 (25) 27.0
 
July 12, 2019, 3 p.m. 40.6 ppb (38) 28.8 ppb (27) N/A 12.0 ppb (11) N/A N/A N/A 0.56 ppb (6) N/A 3.0 μg/m3 (12) 38.0
 
July 12, 2019, 2 p.m. 32.4 ppb (30) 21.2 ppb (20) N/A 11.0 ppb (10) N/A N/A N/A 0.54 ppb (6) N/A -1.0 μg/m3 (0) 30.0
 
July 12, 2019, 1 p.m. 27.8 ppb (26) 15.4 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.5 ppb (6) N/A 0.0 μg/m3 (0) 26.0
 
July 12, 2019, noon 24.7 ppb (23) 12.0 ppb (11) N/A 13.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (12) 23.0
 
July 12, 2019, 11 a.m. 22.4 ppb (21) 11.2 ppb (10) N/A 11.0 ppb (10) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 21.0
 
July 12, 2019, 10 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
 
July 12, 2019, 9 a.m. 10.1 ppb (9) 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 1.0 μg/m3 (4) 9.0
 
July 12, 2019, 8 a.m. 9.9 ppb (9) 4.3 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 0.0 μg/m3 (0) 9.0
 
July 12, 2019, 7 a.m. 11.3 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A -1.0 μg/m3 (0) 10.0
 
July 12, 2019, 6 a.m. 12.6 ppb (12) 5.6 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 0.0 μg/m3 (0) 12.0
 
July 12, 2019, 5 a.m. 14.2 ppb (13) 6.7 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.39 ppb (4) N/A 1.0 μg/m3 (4) 13.0
 
July 12, 2019, 4 a.m. 15.5 ppb (14) 7.6 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 14.0
 
July 12, 2019, 3 a.m. 16.9 ppb (16) 9.1 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.52 ppb (6) N/A 0.0 μg/m3 (0) 16.0
 
July 12, 2019, 2 a.m. 9.3 ppb (9) 4.3 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 0.0 μg/m3 (0) 9.0
 
July 12, 2019, 1 a.m. 14.6 ppb (14) 8.3 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 14.0
 
July 12, 2019, midnight 17.9 ppb (17) 10.2 ppb (9) N/A 8.0 ppb (7) N/A N/A N/A 0.44 ppb (5) N/A 2.0 μg/m3 (8) 17.0
 
July 11, 2019, 11 p.m. 7.7 ppb (7) 3.7 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (4) N/A 1.0 μg/m3 (4) 7.0
 
July 11, 2019, 10 p.m. 19.8 ppb (18) 10.5 ppb (10) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 1.0 μg/m3 (4) 18.0
 
July 11, 2019, 9 p.m. 20.6 ppb (19) 11.2 ppb (10) N/A 9.0 ppb (8) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 19.0
 
July 11, 2019, 8 p.m. 16.0 ppb (15) 7.7 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 15.0
 
July 11, 2019, 7 p.m. 21.4 ppb (20) 12.3 ppb (11) N/A 9.0 ppb (8) N/A N/A N/A 0.43 ppb (5) N/A 2.0 μg/m3 (8) 20.0
 
July 11, 2019, 6 p.m. 44.8 ppb (41) 28.4 ppb (26) N/A 16.0 ppb (15) N/A N/A N/A 0.58 ppb (6) N/A 3.0 μg/m3 (12) 41.0
 
July 11, 2019, 5 p.m. 45.3 ppb (42) 30.2 ppb (28) N/A 15.0 ppb (14) N/A N/A N/A 0.56 ppb (6) N/A 5.0 μg/m3 (21) 42.0
 
July 11, 2019, 4 p.m. 42.9 ppb (40) 30.0 ppb (28) N/A 13.0 ppb (12) N/A N/A N/A 0.53 ppb (6) N/A 5.0 μg/m3 (21) 40.0
 
July 11, 2019, 3 p.m. 45.9 ppb (42) 34.1 ppb (32) N/A 12.0 ppb (11) N/A N/A N/A 0.59 ppb (7) N/A 8.0 μg/m3 (33) 42.0
 
July 11, 2019, 2 p.m. 29.3 ppb (27) 19.6 ppb (18) N/A 10.0 ppb (9) N/A N/A N/A 0.52 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
July 11, 2019, 1 p.m. 27.4 ppb (25) 16.5 ppb (15) N/A 11.0 ppb (10) N/A N/A N/A 0.48 ppb (5) N/A 3.0 μg/m3 (12) 25.0
 
July 11, 2019, noon 40.3 ppb (37) 26.7 ppb (25) N/A 14.0 ppb (13) N/A N/A N/A 0.47 ppb (5) N/A 4.0 μg/m3 (17) 37.0
 
July 11, 2019, 11 a.m. 32.3 ppb (30) 20.2 ppb (19) N/A 12.0 ppb (11) N/A N/A N/A 0.39 ppb (4) N/A 4.0 μg/m3 (17) 30.0
 
July 11, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 9 a.m. 19.2 ppb (18) 9.3 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
July 11, 2019, 8 a.m. 13.8 ppb (13) 5.1 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 13.0
 
July 11, 2019, 7 a.m. 8.9 ppb (8) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
July 11, 2019, 6 a.m. 9.7 ppb (9) 1.1 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 5 a.m. 15.6 ppb (14) 5.6 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 4 a.m. 20.6 ppb (19) 9.9 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 2.0 μg/m3 (8) 19.0
 
July 11, 2019, 3 a.m. 17.2 ppb (16) 7.5 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 16.0
 
July 11, 2019, 2 a.m. 19.1 ppb (18) 10.2 ppb (9) N/A 9.0 ppb (8) N/A N/A N/A 0.53 ppb (6) N/A 3.0 μg/m3 (12) 18.0
 
July 11, 2019, 1 a.m. 11.9 ppb (11) 5.4 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (4) 11.0
 
July 11, 2019, midnight 13.5 ppb (12) 6.6 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 1.0 μg/m3 (4) 12.0
 
July 10, 2019, 11 p.m. 10.7 ppb (10) 4.8 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 0.0 μg/m3 (0) 10.0
 
July 10, 2019, 10 p.m. 15.1 ppb (14) 7.3 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 14.0
 
July 10, 2019, 9 p.m. 13.4 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 10, 2019, 8 p.m. 13.6 ppb (13) 6.8 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (12) 13.0
 
July 10, 2019, 7 p.m. 19.6 ppb (18) 11.7 ppb (11) N/A 8.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 2.0 μg/m3 (8) 18.0
 
July 10, 2019, 6 p.m. 27.3 ppb (25) 18.1 ppb (17) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 1.0 μg/m3 (4) 25.0
 
July 10, 2019, 5 p.m. 26.2 ppb (24) 17.7 ppb (16) N/A 9.0 ppb (8) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (4) 24.0
 
July 10, 2019, 4 p.m. 32.3 ppb (30) 21.8 ppb (20) N/A 11.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 2.0 μg/m3 (8) 30.0
 
July 10, 2019, 3 p.m. 21.3 ppb (20) 13.0 ppb (12) N/A 8.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (12) 20.0
 
July 10, 2019, 2 p.m. 5.5 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
July 10, 2019, 1 p.m. 14.1 ppb (13) 7.7 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (4) 13.0
 
July 10, 2019, noon 26.5 ppb (25) 16.2 ppb (15) N/A 10.0 ppb (9) N/A N/A N/A 0.4 ppb (4) N/A 3.0 μg/m3 (12) 25.0
 
July 10, 2019, 11 a.m. 4.9 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 10, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 10, 2019, 9 a.m. 1.8 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
July 10, 2019, 8 a.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
July 10, 2019, 7 a.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
July 10, 2019, 6 a.m. 3.1 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
July 10, 2019, 5 a.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
July 10, 2019, 4 a.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (3) N/A -1.0 μg/m3 (0) 3.0
 
July 10, 2019, 3 a.m. 3.4 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 10, 2019, 2 a.m. 6.1 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 10, 2019, 1 a.m. 10.7 ppb (10) 5.3 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 10, 2019, midnight 18.4 ppb (17) 10.7 ppb (10) N/A 8.0 ppb (7) N/A N/A N/A 0.47 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
July 9, 2019, 11 p.m. 16.2 ppb (15) 8.2 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.45 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
July 9, 2019, 10 p.m. 23.5 ppb (22) 11.5 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 9, 2019, 9 p.m. 21.4 ppb (20) 10.7 ppb (10) N/A 11.0 ppb (10) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 20.0
 
July 9, 2019, 8 p.m. 13.5 ppb (12) 6.1 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 2.0 μg/m3 (8) 12.0
 
July 9, 2019, 7 p.m. 27.1 ppb (25) 13.9 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.46 ppb (5) N/A 4.0 μg/m3 (17) 25.0
 
July 9, 2019, 6 p.m. 19.9 ppb (18) 9.8 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 9, 2019, 5 p.m. 6.3 ppb (6) 2.2 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
 
July 9, 2019, 4 p.m. 12.1 ppb (11) 4.8 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 9, 2019, 3 p.m. 10.5 ppb (10) 3.6 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
July 9, 2019, 2 p.m. 6.2 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
July 9, 2019, 1 p.m. 5.5 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 9, 2019, noon 6.5 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 9, 2019, 11 a.m. 4.8 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 9, 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
 
July 9, 2019, 9 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 9, 2019, 8 a.m. 3.3 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 9, 2019, 7 a.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 9, 2019, 6 a.m. 2.1 ppb (2) 0.2 ppb (0) 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
 
July 9, 2019, 5 a.m. 4.6 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 9, 2019, 4 a.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0