AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

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

Reporting: True, Located: True

Current AQI: 46.0

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
March 19, 2019, 4 a.m. 31.0 ppb (29) 4.1 ppb (4) N/A 27.0 ppb (25) N/A N/A N/A 0.61 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 3 a.m. 27.2 ppb (25) 2.5 ppb (2) N/A 25.0 ppb (23) N/A N/A N/A 0.56 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 2 a.m. 26.1 ppb (24) 2.5 ppb (2) N/A 24.0 ppb (22) N/A N/A N/A 0.61 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 1 a.m. 19.6 ppb (18) 2.4 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.56 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, midnight 17.3 ppb (16) 2.5 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.48 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 11 p.m. 13.5 ppb (12) 2.6 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
March 18, 2019, 10 p.m. 15.3 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
March 18, 2019, 9 p.m. 14.9 ppb (14) 4.4 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 8 p.m. 22.5 ppb (21) 6.7 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 7 p.m. 30.4 ppb (28) 10.4 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (12) 28.0
 
March 18, 2019, 6 p.m. 36.2 ppb (34) 13.7 ppb (13) N/A 23.0 ppb (21) N/A N/A N/A 0.62 ppb (7) N/A N/A 34.0
 
March 18, 2019, 5 p.m. 56.4 ppb (53) 26.7 ppb (25) N/A 30.0 ppb (28) N/A N/A N/A 0.74 ppb (8) N/A 10.0 μg/m3 (42) 53.0
 
March 18, 2019, 4 p.m. 73.0 ppb (70) 40.8 ppb (38) N/A 32.0 ppb (30) N/A N/A N/A 0.9 ppb (10) N/A 10.0 μg/m3 (42) 70.0
 
March 18, 2019, 3 p.m. 82.3 ppb (80) 53.0 ppb (49) N/A 29.0 ppb (27) N/A N/A N/A 0.96 ppb (11) N/A 14.0 μg/m3 (54) 80.0
 
March 18, 2019, 2 p.m. 84.8 ppb (83) 56.4 ppb (53) N/A 28.0 ppb (26) N/A N/A N/A 0.98 ppb (11) N/A 11.0 μg/m3 (46) 83.0
 
March 18, 2019, 1 p.m. 65.4 ppb (62) 39.9 ppb (37) N/A 26.0 ppb (24) N/A N/A N/A 0.72 ppb (8) N/A 11.0 μg/m3 (46) 62.0
 
March 18, 2019, noon 54.8 ppb (51) 29.5 ppb (27) N/A 25.0 ppb (23) N/A N/A N/A 0.58 ppb (6) N/A 11.0 μg/m3 (46) 51.0
 
March 18, 2019, 11 a.m. 46.9 ppb (43) 19.3 ppb (18) N/A 28.0 ppb (26) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 43.0
 
March 18, 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
 
March 18, 2019, 9 a.m. 19.7 ppb (18) 6.1 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 8 a.m. 20.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 7 a.m. 19.0 ppb (18) 4.8 ppb (4) 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
 
March 18, 2019, 6 a.m. 23.7 ppb (22) 6.4 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 5 a.m. 28.3 ppb (26) 7.4 ppb (7) N/A 21.0 ppb (19) N/A N/A N/A 0.62 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 4 a.m. 32.9 ppb (30) 8.6 ppb (8) N/A 24.0 ppb (22) N/A N/A N/A 0.68 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 3 a.m. 13.1 ppb (12) 1.6 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 2 a.m. 22.3 ppb (21) 3.6 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A 0.7 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 1 a.m. 20.1 ppb (19) 3.4 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.81 ppb (9) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, midnight 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 17, 2019, 11 p.m. 8.1 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
March 17, 2019, 10 p.m. 10.0 ppb (9) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 9.0
 
March 17, 2019, 9 p.m. 17.1 ppb (16) 4.8 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.63 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
March 17, 2019, 8 p.m. 17.3 ppb (16) 4.9 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.64 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 7 p.m. 9.7 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 6 p.m. 17.8 ppb (16) 5.8 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.67 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 5 p.m. 27.5 ppb (25) 11.5 ppb (11) N/A 16.0 ppb (15) N/A N/A N/A 0.87 ppb (10) N/A 5.0 μg/m3 (21) 25.0
 
March 17, 2019, 4 p.m. 23.1 ppb (21) 9.6 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 3 p.m. 35.4 ppb (33) 19.5 ppb (18) N/A 16.0 ppb (15) N/A N/A N/A 0.8 ppb (9) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 2 p.m. 32.3 ppb (30) 15.8 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.68 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 1 p.m. 22.2 ppb (21) 9.2 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.57 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, noon 22.4 ppb (21) 6.3 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.54 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 11 a.m. 17.2 ppb (16) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.57 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
March 17, 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
 
March 17, 2019, 9 a.m. 18.9 ppb (18) 5.8 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.56 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 8 a.m. 22.1 ppb (20) 6.0 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.65 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 7 a.m. 22.0 ppb (20) 6.3 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.64 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 6 a.m. 18.2 ppb (17) 3.9 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.58 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 5 a.m. 24.0 ppb (22) 4.9 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A 0.69 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 4 a.m. 17.3 ppb (16) 1.4 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.49 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 3 a.m. 23.4 ppb (22) 3.0 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A 0.48 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 2 a.m. 22.2 ppb (21) 3.1 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A 0.53 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 1 a.m. 19.7 ppb (18) 2.5 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.53 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, midnight 21.2 ppb (20) 4.0 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.63 ppb (7) N/A 3.0 μg/m3 (12) 20.0
 
March 16, 2019, 11 p.m. 13.1 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 10 p.m. 10.6 ppb (10) 2.3 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.36 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 9 p.m. 10.1 ppb (9) 2.6 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.36 ppb (4) N/A 2.0 μg/m3 (8) 9.0
 
March 16, 2019, 8 p.m. 21.8 ppb (20) 6.7 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.57 ppb (6) N/A 2.0 μg/m3 (8) 20.0
 
March 16, 2019, 7 p.m. 25.6 ppb (24) 9.1 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.62 ppb (7) N/A 1.0 μg/m3 (4) 24.0
 
March 16, 2019, 6 p.m. 28.8 ppb (27) 11.0 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A 0.71 ppb (8) N/A 4.0 μg/m3 (17) 27.0
 
March 16, 2019, 5 p.m. 43.0 ppb (40) 21.0 ppb (19) N/A 22.0 ppb (20) N/A N/A N/A 0.91 ppb (10) N/A 8.0 μg/m3 (33) 40.0
 
March 16, 2019, 4 p.m. 30.4 ppb (28) 14.0 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.54 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 3 p.m. 49.7 ppb (46) 28.6 ppb (26) N/A 21.0 ppb (19) N/A N/A N/A 0.73 ppb (8) N/A 9.0 μg/m3 (38) 46.0
 
March 16, 2019, 2 p.m. 55.1 ppb (51) 32.5 ppb (30) N/A 23.0 ppb (21) N/A N/A N/A 0.71 ppb (8) N/A 9.0 μg/m3 (38) 51.0
 
March 16, 2019, 1 p.m. 41.7 ppb (39) 19.6 ppb (18) N/A 22.0 ppb (20) N/A N/A N/A 0.61 ppb (7) N/A 6.0 μg/m3 (25) 39.0
 
March 16, 2019, noon 35.6 ppb (33) 15.6 ppb (14) N/A 20.0 ppb (19) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 33.0
 
March 16, 2019, 11 a.m. 26.6 ppb (25) 10.9 ppb (10) N/A 16.0 ppb (15) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 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
 
March 16, 2019, 9 a.m. 28.4 ppb (26) 11.1 ppb (10) N/A 17.0 ppb (16) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 8 a.m. 27.3 ppb (25) 9.9 ppb (9) N/A 17.0 ppb (16) N/A N/A N/A 0.54 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 7 a.m. 23.3 ppb (22) 7.0 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.58 ppb (6) N/A 5.0 μg/m3 (21) 22.0
 
March 16, 2019, 6 a.m. 27.9 ppb (26) 9.2 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.68 ppb (8) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 5 a.m. 31.6 ppb (29) 8.3 ppb (8) N/A 23.0 ppb (21) N/A N/A N/A 0.67 ppb (7) N/A 5.0 μg/m3 (21) 29.0
 
March 16, 2019, 4 a.m. 35.6 ppb (33) 10.5 ppb (10) N/A 25.0 ppb (23) N/A N/A N/A 0.74 ppb (8) N/A 6.0 μg/m3 (25) 33.0
 
March 16, 2019, 3 a.m. 39.9 ppb (37) 9.6 ppb (9) N/A 30.0 ppb (28) N/A N/A N/A 0.7 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 2 a.m. 15.2 ppb (14) 1.8 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.37 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, 1 a.m. 6.8 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, midnight 14.8 ppb (14) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 11 p.m. 26.2 ppb (24) 9.0 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 24.0
 
March 15, 2019, 10 p.m. 19.6 ppb (18) 7.2 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 9 p.m. 15.6 ppb (14) 5.8 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 8 p.m. 28.3 ppb (26) 11.6 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A 0.37 ppb (4) N/A 4.0 μg/m3 (17) 26.0
 
March 15, 2019, 7 p.m. 20.8 ppb (19) 7.6 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (12) 19.0
 
March 15, 2019, 6 p.m. 50.2 ppb (46) 23.9 ppb (22) N/A 26.0 ppb (24) N/A N/A N/A 0.57 ppb (6) N/A 8.0 μg/m3 (33) 46.0
 
March 15, 2019, 5 p.m. 101.9 ppb (100) 65.0 ppb (62) N/A 37.0 ppb (34) N/A N/A N/A 0.89 ppb (10) N/A 17.0 μg/m3 (61) 100.0
 
March 15, 2019, 4 p.m. 140.9 ppb (108) 103.2 ppb (100) N/A 38.0 ppb (35) N/A N/A N/A 1.13 ppb (13) N/A 18.0 μg/m3 (63) 108.0
 
March 15, 2019, 3 p.m. 114.1 ppb (103) 81.3 ppb (79) N/A 33.0 ppb (31) N/A N/A N/A 0.98 ppb (11) N/A 7.0 μg/m3 (29) 103.0
 
March 15, 2019, 2 p.m. 86.4 ppb (84) 58.2 ppb (54) N/A 28.0 ppb (26) N/A N/A N/A 0.82 ppb (9) N/A 5.0 μg/m3 (21) 84.0
 
March 15, 2019, 1 p.m. 90.7 ppb (89) 60.3 ppb (57) N/A 30.0 ppb (28) N/A N/A N/A 0.69 ppb (8) N/A 2.0 μg/m3 (8) 89.0
 
March 15, 2019, noon 37.0 ppb (34) 13.6 ppb (13) N/A 23.0 ppb (21) N/A N/A N/A 0.49 ppb (5) N/A 5.0 μg/m3 (21) 34.0
 
March 15, 2019, 11 a.m. 59.4 ppb (56) 33.1 ppb (31) N/A 26.0 ppb (24) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (33) 56.0
 
March 15, 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
 
March 15, 2019, 9 a.m. 29.4 ppb (27) 11.3 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (4) 27.0
 
March 15, 2019, 8 a.m. 24.6 ppb (23) 7.0 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.41 ppb (5) N/A 2.0 μg/m3 (8) 23.0
 
March 15, 2019, 7 a.m. 29.5 ppb (27) 8.5 ppb (8) N/A 21.0 ppb (19) N/A N/A N/A 0.47 ppb (5) N/A 5.0 μg/m3 (21) 27.0
 
March 15, 2019, 6 a.m. 32.9 ppb (30) 11.1 ppb (10) N/A 22.0 ppb (20) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 30.0
 
March 15, 2019, 5 a.m. 19.2 ppb (18) 2.1 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A -1.0 μg/m3 (0) 18.0
 
March 15, 2019, 4 a.m. 37.3 ppb (35) 11.9 ppb (11) N/A 25.0 ppb (23) N/A N/A N/A 0.61 ppb (7) N/A 2.0 μg/m3 (8) 35.0
 
March 15, 2019, 3 a.m. 35.5 ppb (33) 6.4 ppb (6) N/A 29.0 ppb (27) N/A N/A N/A 0.56 ppb (6) N/A 4.0 μg/m3 (17) 33.0
 
March 15, 2019, 2 a.m. 12.3 ppb (11) 1.6 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.29 ppb (3) N/A -1.0 μg/m3 (0) 11.0
 
March 15, 2019, 1 a.m. 15.4 ppb (14) 4.3 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A -3.0 μg/m3 (0) 14.0
 
March 15, 2019, midnight 29.1 ppb (27) 11.1 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A -2.0 μg/m3 (0) 27.0
 
March 14, 2019, 11 p.m. 40.2 ppb (37) 17.2 ppb (16) N/A 23.0 ppb (21) N/A N/A N/A 0.39 ppb (4) N/A 0.0 μg/m3 (0) 37.0
 
March 14, 2019, 10 p.m. 48.6 ppb (45) 22.2 ppb (21) N/A 26.0 ppb (24) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 45.0
 
March 14, 2019, 9 p.m. 37.3 ppb (35) 16.4 ppb (15) N/A 21.0 ppb (19) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (12) 35.0
 
March 14, 2019, 8 p.m. 33.3 ppb (31) 15.0 ppb (14) N/A 18.0 ppb (17) N/A N/A N/A 0.44 ppb (5) N/A 2.0 μg/m3 (8) 31.0
 
March 14, 2019, 7 p.m. 33.4 ppb (31) 16.2 ppb (15) N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A -1.0 μg/m3 (0) 31.0
 
March 14, 2019, 6 p.m. 37.2 ppb (34) 17.5 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A 0.45 ppb (5) N/A N/A 34.0
 
March 14, 2019, 5 p.m. 64.1 ppb (61) 30.1 ppb (28) N/A 34.0 ppb (31) N/A N/A N/A 0.87 ppb (10) N/A 4.0 μg/m3 (17) 61.0
 
March 14, 2019, 4 p.m. 69.6 ppb (67) 38.4 ppb (36) N/A 31.0 ppb (29) N/A N/A N/A 0.71 ppb (8) N/A 6.0 μg/m3 (25) 67.0
 
March 14, 2019, 3 p.m. 122.8 ppb (104) 89.1 ppb (87) N/A 34.0 ppb (31) N/A N/A N/A 1.16 ppb (13) N/A 7.0 μg/m3 (29) 104.0
 
March 14, 2019, 2 p.m. 102.2 ppb (100) 71.3 ppb (68) N/A 31.0 ppb (29) N/A N/A N/A 0.98 ppb (11) N/A 6.0 μg/m3 (25) 100.0
 
March 14, 2019, 1 p.m. 73.9 ppb (71) 44.1 ppb (41) N/A 30.0 ppb (28) N/A N/A N/A 0.75 ppb (8) N/A 3.0 μg/m3 (12) 71.0
 
March 14, 2019, noon 65.4 ppb (62) 38.0 ppb (35) N/A 27.0 ppb (25) N/A N/A N/A 0.68 ppb (8) N/A 4.0 μg/m3 (17) 62.0
 
March 14, 2019, 11 a.m. 50.2 ppb (46) 25.2 ppb (23) N/A 25.0 ppb (23) N/A N/A N/A 0.54 ppb (6) N/A 3.0 μg/m3 (12) 46.0
 
March 14, 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
 
March 14, 2019, 9 a.m. 33.7 ppb (31) 9.4 ppb (9) N/A 24.0 ppb (22) N/A N/A N/A 0.5 ppb (6) N/A 2.0 μg/m3 (8) 31.0
 
March 14, 2019, 8 a.m. 36.6 ppb (34) 11.4 ppb (11) N/A 25.0 ppb (23) N/A N/A N/A 0.51 ppb (6) N/A 3.0 μg/m3 (12) 34.0
 
March 14, 2019, 7 a.m. 28.2 ppb (26) 4.9 ppb (5) N/A 23.0 ppb (21) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 26.0
 
March 14, 2019, 6 a.m. 28.0 ppb (26) 4.4 ppb (4) N/A 24.0 ppb (22) N/A N/A N/A 0.54 ppb (6) N/A 6.0 μg/m3 (25) 26.0
 
March 14, 2019, 5 a.m. 32.1 ppb (30) 5.6 ppb (5) N/A 27.0 ppb (25) N/A N/A N/A 0.55 ppb (6) N/A 2.0 μg/m3 (8) 30.0
 
March 14, 2019, 4 a.m. 27.0 ppb (25) 5.9 ppb (5) N/A 21.0 ppb (19) N/A N/A N/A 0.56 ppb (6) N/A 4.0 μg/m3 (17) 25.0
 
March 14, 2019, 3 a.m. 32.4 ppb (30) 10.0 ppb (9) N/A 22.0 ppb (20) N/A N/A N/A 0.56 ppb (6) N/A 5.0 μg/m3 (21) 30.0
 
March 14, 2019, 2 a.m. 30.1 ppb (28) 10.5 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.56 ppb (6) N/A 3.0 μg/m3 (12) 28.0
 
March 14, 2019, 1 a.m. 21.8 ppb (20) 8.0 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 20.0
 
March 14, 2019, midnight 22.4 ppb (21) 8.9 ppb (8) N/A 14.0 ppb (13) N/A N/A N/A 0.36 ppb (4) N/A 0.0 μg/m3 (0) 21.0
 
March 13, 2019, 11 p.m. 26.3 ppb (24) 11.0 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A 0.38 ppb (4) N/A -1.0 μg/m3 (0) 24.0
 
March 13, 2019, 10 p.m. 29.3 ppb (27) 13.1 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.39 ppb (4) N/A 0.0 μg/m3 (0) 27.0
 
March 13, 2019, 9 p.m. 31.2 ppb (29) 14.2 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A 1.0 μg/m3 (4) 29.0
 
March 13, 2019, 8 p.m. 29.4 ppb (27) 13.8 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.49 ppb (5) N/A 1.0 μg/m3 (4) 27.0
 
March 13, 2019, 7 p.m. 29.3 ppb (27) 14.5 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 1.0 μg/m3 (4) 27.0
 
March 13, 2019, 6 p.m. 28.9 ppb (27) 14.1 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.46 ppb (5) N/A 0.0 μg/m3 (0) 27.0
 
March 13, 2019, 5 p.m. 31.6 ppb (29) 15.4 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A 0.46 ppb (5) N/A 3.0 μg/m3 (12) 29.0
 
March 13, 2019, 4 p.m. 37.4 ppb (35) 18.2 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 4.0 μg/m3 (17) 35.0
 
March 13, 2019, 3 p.m. 35.3 ppb (33) 18.2 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A 0.54 ppb (6) N/A 3.0 μg/m3 (12) 33.0
 
March 13, 2019, 2 p.m. 35.9 ppb (33) 15.7 ppb (15) N/A 20.0 ppb (19) N/A N/A N/A 0.55 ppb (6) N/A 2.0 μg/m3 (8) 33.0
 
March 13, 2019, 1 p.m. 41.8 ppb (39) 18.9 ppb (18) N/A 23.0 ppb (21) N/A N/A N/A 0.56 ppb (6) N/A 1.0 μg/m3 (4) 39.0
 
March 13, 2019, noon 26.2 ppb (24) 11.0 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 3.0 μg/m3 (12) 24.0
 
March 13, 2019, 11 a.m. 15.0 ppb (14) 6.3 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 13, 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
 
March 13, 2019, 9 a.m. 7.1 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 13, 2019, 8 a.m. 7.2 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
March 13, 2019, 7 a.m. 6.4 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
March 13, 2019, 6 a.m. 10.7 ppb (10) 3.6 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
March 13, 2019, 5 a.m. 14.2 ppb (13) 4.8 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 13, 2019, 4 a.m. 11.7 ppb (11) 4.2 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.42 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
March 13, 2019, 3 a.m. 17.8 ppb (16) 7.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 16.0
 
March 13, 2019, 2 a.m. 22.3 ppb (21) 8.9 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.55 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
March 13, 2019, 1 a.m. 21.1 ppb (20) 7.4 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.57 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
March 13, 2019, midnight 19.7 ppb (18) 7.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 18.0
 
March 12, 2019, 11 p.m. 20.8 ppb (19) 7.8 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 10 p.m. 13.8 ppb (13) 4.7 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (12) 13.0
 
March 12, 2019, 9 p.m. 7.6 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 12, 2019, 8 p.m. 6.1 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 12, 2019, 7 p.m. 10.7 ppb (10) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (8) 10.0
 
March 12, 2019, 6 p.m. 21.1 ppb (20) 8.3 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 20.0
 
March 12, 2019, 5 p.m. 23.5 ppb (22) 9.9 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
 
March 12, 2019, 4 p.m. 41.5 ppb (38) 22.3 ppb (21) N/A 19.0 ppb (18) N/A N/A N/A 0.66 ppb (7) N/A 7.0 μg/m3 (29) 38.0
 
March 12, 2019, 3 p.m. 85.3 ppb (83) 61.7 ppb (58) N/A 24.0 ppb (22) N/A N/A N/A 0.95 ppb (11) N/A 8.0 μg/m3 (33) 83.0
 
March 12, 2019, 2 p.m. 76.8 ppb (74) 53.9 ppb (50) N/A 23.0 ppb (21) N/A N/A N/A 0.89 ppb (10) N/A 7.0 μg/m3 (29) 74.0
 
March 12, 2019, 1 p.m. 66.7 ppb (64) 45.2 ppb (42) N/A 22.0 ppb (20) N/A N/A N/A 0.71 ppb (8) N/A 4.0 μg/m3 (17) 64.0
 
March 12, 2019, noon 52.4 ppb (49) 31.9 ppb (30) N/A 21.0 ppb (19) N/A N/A N/A 0.51 ppb (6) N/A 6.0 μg/m3 (25) 49.0
 
March 12, 2019, 11 a.m. 40.2 ppb (37) 21.8 ppb (20) N/A 18.0 ppb (17) N/A N/A N/A 0.48 ppb (5) N/A 5.0 μg/m3 (21) 37.0
 
March 12, 2019, 10 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
 
March 12, 2019, 9 a.m. 14.5 ppb (13) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 12, 2019, 8 a.m. 14.6 ppb (14) 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 12, 2019, 7 a.m. 24.3 ppb (23) 6.9 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 23.0
 
March 12, 2019, 6 a.m. 10.5 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.4 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
March 12, 2019, 5 a.m. 11.5 ppb (11) 0.9 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 17.0