AQSQID: 060130002

Site Name: Concord

Location: Concord (Chevron), CA

Reporting: False, Located: True

Current AQI: None

Concord (Chevron) CA, US: 37.9383, -122.025

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 21, 2020, 8 a.m. 39.1 ppb (36) 25.5 ppb (24) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 0.0 ppb (0) 0.92 ppb (10) N/A 21.0 μg/m3 (69) 69.0
 
Jan. 21, 2020, 7 a.m. 44.0 ppb (41) 29.6 ppb (27) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 0.0 ppb (0) 1.01 ppb (11) N/A 24.0 μg/m3 (76) 76.0
 
Jan. 21, 2020, 6 a.m. 49.3 ppb (46) 32.4 ppb (30) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 0.0 ppb (0) 1.1 ppb (12) N/A 30.0 μg/m3 (88) 88.0
 
Jan. 21, 2020, 5 a.m. 43.9 ppb (41) 24.7 ppb (23) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 0.0 ppb (0) 1.0 ppb (11) N/A 24.0 μg/m3 (76) 76.0
 
Jan. 21, 2020, 4 a.m. 45.5 ppb (42) 26.3 ppb (24) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 0.0 ppb (0) 1.01 ppb (11) N/A 29.0 μg/m3 (86) 86.0
 
Jan. 21, 2020, 3 a.m. 44.0 ppb (41) 25.4 ppb (24) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 0.0 ppb (0) 1.04 ppb (12) N/A 24.0 μg/m3 (76) 76.0
 
Jan. 21, 2020, 2 a.m. 30.7 ppb (28) 10.6 ppb (10) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) 0.79 ppb (9) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 21, 2020, 1 a.m. 25.9 ppb (24) 6.3 ppb (6) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 1.0 ppb (1) 0.73 ppb (8) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 21, 2020, midnight 21.6 ppb (20) 5.5 ppb (5) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 4.0 ppb (3) 0.67 ppb (7) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 20, 2020, 11 p.m. 20.9 ppb (19) 6.0 ppb (6) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 7.0 ppb (5) 0.65 ppb (7) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 20, 2020, 10 p.m. 14.6 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 9.0 ppb (7) 0.55 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2020, 9 p.m. 14.9 ppb (14) 4.7 ppb (4) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 8.0 ppb (6) 0.55 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2020, 8 p.m. 18.0 ppb (17) 5.7 ppb (5) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 7.0 ppb (5) 0.59 ppb (7) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 20, 2020, 7 p.m. 21.4 ppb (20) 9.0 ppb (8) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 6.0 ppb (5) 0.59 ppb (7) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 20, 2020, 6 p.m. 24.5 ppb (23) 11.1 ppb (10) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 4.0 ppb (3) 0.62 ppb (7) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 20, 2020, 5 p.m. 21.7 ppb (20) 8.8 ppb (8) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 2.0 ppb (2) 0.57 ppb (6) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 20, 2020, 4 p.m. 23.5 ppb (22) 11.5 ppb (11) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 0.0 ppb (0) 0.56 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 20, 2020, 3 p.m. 25.6 ppb (24) 12.6 ppb (12) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 0.0 ppb (0) 0.58 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 20, 2020, 2 p.m. 19.6 ppb (18) 6.4 ppb (6) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 0.0 ppb (0) 0.55 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 20, 2020, 1 p.m. 18.3 ppb (17) 5.1 ppb (5) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 0.0 ppb (0) 0.53 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 20, 2020, noon 16.9 ppb (16) 4.3 ppb (4) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 0.0 ppb (0) 0.51 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 20, 2020, 11 a.m. 15.7 ppb (15) 3.6 ppb (3) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 0.0 ppb (0) 0.54 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 20, 2020, 9 a.m. 19.3 ppb (18) 6.7 ppb (6) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.64 ppb (7) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 20, 2020, 8 a.m. 18.8 ppb (17) 6.0 ppb (6) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.63 ppb (7) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 20, 2020, 7 a.m. 18.1 ppb (17) 5.6 ppb (5) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.63 ppb (7) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 20, 2020, 6 a.m. 18.5 ppb (17) 4.8 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) 0.62 ppb (7) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 20, 2020, 5 a.m. 13.6 ppb (13) 1.5 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 1.0 ppb (1) 0.56 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 20, 2020, 4 a.m. 17.5 ppb (16) 1.9 ppb (2) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 1.0 ppb (1) 0.64 ppb (7) N/A 21.0 μg/m3 (69) 69.0
 
Jan. 20, 2020, 3 a.m. 16.7 ppb (15) 1.5 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 2.0 ppb (2) 0.63 ppb (7) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 20, 2020, 2 a.m. 13.0 ppb (12) 0.6 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 6.0 ppb (5) 0.56 ppb (6) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 20, 2020, 1 a.m. 8.1 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 11.0 ppb (8) 0.47 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2020, midnight 5.4 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2020, 11 p.m. 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2020, 10 p.m. 4.6 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2020, 9 p.m. 4.7 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (12) 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2020, 8 p.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (15) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2020, 7 p.m. 4.0 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2020, 6 p.m. 7.7 ppb (7) 2.2 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 19.0 ppb (15) 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2020, 5 p.m. 15.4 ppb (14) 5.2 ppb (5) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 8.0 ppb (6) 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2020, 4 p.m. 23.0 ppb (21) 8.2 ppb (8) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 3.0 ppb (2) 0.6 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2020, 3 p.m. 23.6 ppb (22) 5.0 ppb (5) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 1.0 ppb (1) 0.56 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2020, 2 p.m. 15.8 ppb (15) 0.8 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 11.0 ppb (8) 0.45 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2020, 1 p.m. 8.2 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2020, noon 3.6 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 19, 2020, 11 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.32 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 19, 2020, 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. 19, 2020, 9 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.34 ppb (4) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 19, 2020, 8 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.34 ppb (4) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 19, 2020, 7 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 19, 2020, 6 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 19, 2020, 5 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2020, 4 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2020, 3 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2020, 2 a.m. 4.3 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) 0.36 ppb (4) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 19, 2020, 1 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) 0.37 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 19, 2020, midnight 3.7 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2020, 11 p.m. 3.2 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 10 p.m. 3.6 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 27.0 ppb (21) 0.38 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2020, 9 p.m. 4.1 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2020, 8 p.m. 5.2 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 7 p.m. 4.8 ppb (4) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 26.0 ppb (20) 0.4 ppb (4) N/A 4.0 μg/m3 (17) 20.0
 
Jan. 18, 2020, 6 p.m. 4.6 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 5 p.m. 5.9 ppb (5) 1.4 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 24.0 ppb (18) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2020, 4 p.m. 35.8 ppb (33) 19.2 ppb (18) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 4.0 ppb (3) 0.6 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2020, 3 p.m. 37.6 ppb (35) 20.5 ppb (19) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 0.0 ppb (0) 0.6 ppb (7) N/A 7.0 μg/m3 (29) 35.0
 
Jan. 18, 2020, 2 p.m. 27.0 ppb (25) 11.9 ppb (11) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 0.0 ppb (0) 0.55 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 1 p.m. 26.8 ppb (25) 11.7 ppb (11) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 0.0 ppb (0) 0.57 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2020, noon 18.1 ppb (17) 6.6 ppb (6) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 0.0 ppb (0) 0.5 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2020, 11 a.m. 14.4 ppb (13) 2.9 ppb (3) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 0.0 ppb (0) 0.49 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2020, 9 a.m. 16.1 ppb (15) 3.5 ppb (3) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.54 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2020, 8 a.m. 17.3 ppb (16) 3.8 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) 0.56 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 18, 2020, 7 a.m. 17.8 ppb (16) 3.7 ppb (3) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) 0.58 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2020, 6 a.m. 17.4 ppb (16) 1.4 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 1.0 ppb (1) 0.57 ppb (6) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 18, 2020, 5 a.m. 13.6 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 7.0 ppb (5) 0.53 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2020, 4 a.m. 17.0 ppb (16) 2.5 ppb (2) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 6.0 ppb (5) 0.56 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2020, 3 a.m. 19.5 ppb (18) 2.1 ppb (2) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 5.0 ppb (4) 0.6 ppb (7) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 18, 2020, 2 a.m. 18.3 ppb (17) 1.8 ppb (2) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 9.0 ppb (7) 0.59 ppb (7) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2020, 1 a.m. 17.5 ppb (16) 1.4 ppb (1) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 11.0 ppb (8) 0.5 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2020, midnight 13.3 ppb (12) 1.7 ppb (2) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 16.0 ppb (12) 0.48 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2020, 11 p.m. 11.6 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 19.0 ppb (15) 0.47 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2020, 10 p.m. 9.7 ppb (9) 3.1 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 20.0 ppb (15) 0.44 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2020, 9 p.m. 10.3 ppb (10) 3.3 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2020, 8 p.m. 15.4 ppb (14) 6.1 ppb (6) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 18.0 ppb (14) 0.46 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2020, 7 p.m. 25.7 ppb (24) 10.7 ppb (10) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 16.0 ppb (12) 0.59 ppb (7) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 17, 2020, 6 p.m. 25.6 ppb (24) 10.8 ppb (10) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 14.0 ppb (11) 0.58 ppb (6) N/A 4.0 μg/m3 (17) 24.0
 
Jan. 17, 2020, 5 p.m. 41.0 ppb (38) 23.5 ppb (22) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 7.0 ppb (5) 0.66 ppb (7) N/A 5.0 μg/m3 (21) 38.0
 
Jan. 17, 2020, 4 p.m. 69.6 ppb (67) 47.8 ppb (44) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 1.0 ppb (1) 0.86 ppb (10) N/A 6.0 μg/m3 (25) 67.0
 
Jan. 17, 2020, 3 p.m. 58.3 ppb (55) 37.0 ppb (34) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) 0.67 ppb (7) N/A 4.0 μg/m3 (17) 55.0
 
Jan. 17, 2020, 2 p.m. 37.1 ppb (34) 17.3 ppb (16) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) 0.52 ppb (6) N/A 6.0 μg/m3 (25) 34.0
 
Jan. 17, 2020, 1 p.m. 25.4 ppb (24) 7.7 ppb (7) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 0.0 ppb (0) 0.42 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, noon 20.4 ppb (19) 3.4 ppb (3) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 2.0 ppb (2) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, 11 a.m. 12.5 ppb (12) 0.6 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 9.0 ppb (7) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2020, 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. 17, 2020, 9 a.m. 8.9 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (15) 0.37 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2020, 8 a.m. 9.6 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.39 ppb (4) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 17, 2020, 7 a.m. 10.7 ppb (10) 0.2 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 17.0 ppb (13) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2020, 6 a.m. 10.2 ppb (9) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 22.0 ppb (17) 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2020, 5 a.m. 9.2 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (19) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, 4 a.m. 6.2 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 17, 2020, 3 a.m. 5.7 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2020, 2 a.m. 5.8 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2020, 1 a.m. 7.2 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.39 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 17, 2020, midnight 5.6 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (26) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 16, 2020, 11 p.m. 5.3 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.39 ppb (4) N/A 2.0 μg/m3 (8) 28.0
 
Jan. 16, 2020, 10 p.m. 6.6 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.39 ppb (4) N/A 3.0 μg/m3 (12) 26.0
 
Jan. 16, 2020, 9 p.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 16, 2020, 8 p.m. 2.8 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.3 ppb (3) N/A 1.0 μg/m3 (4) 31.0
 
Jan. 16, 2020, 7 p.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.31 ppb (3) N/A 2.0 μg/m3 (8) 30.0
 
Jan. 16, 2020, 6 p.m. 5.7 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (26) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 26.0
 
Jan. 16, 2020, 5 p.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.31 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
Jan. 16, 2020, 4 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 16, 2020, 3 p.m. 2.9 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 16, 2020, 2 p.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 16, 2020, 1 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 16, 2020, noon 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 16, 2020, 11 a.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 16, 2020, 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. 16, 2020, 9 a.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 16, 2020, 8 a.m. 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 16, 2020, 7 a.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 16, 2020, 6 a.m. 20.9 ppb (19) 1.8 ppb (2) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 10.0 ppb (8) 0.55 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 16, 2020, 5 a.m. 23.2 ppb (21) 1.1 ppb (1) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 8.0 ppb (6) 0.61 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2020, 4 a.m. 20.1 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 12.0 ppb (9) 0.51 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 3 a.m. 13.7 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 17.0 ppb (13) 0.39 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2020, 2 a.m. 18.4 ppb (17) 1.4 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 14.0 ppb (11) 0.51 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 1 a.m. 16.7 ppb (15) 0.8 ppb (1) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 19.0 ppb (15) 0.49 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2020, midnight 10.9 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) 25.0 ppb (19) 0.4 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, 11 p.m. 7.7 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) 30.0 ppb (23) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 15, 2020, 10 p.m. 4.2 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.32 ppb (4) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 15, 2020, 9 p.m. 6.6 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 32.0 ppb (25) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2020, 8 p.m. 9.6 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.38 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 15, 2020, 7 p.m. 5.3 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) 0.33 ppb (4) N/A N/A 27.0
 
Jan. 15, 2020, 6 p.m. 18.2 ppb (17) 7.6 ppb (7) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 19.0 ppb (15) 0.44 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 15, 2020, 5 p.m. 32.1 ppb (30) 16.0 ppb (15) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 7.0 ppb (5) 0.57 ppb (6) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 15, 2020, 4 p.m. 47.4 ppb (44) 28.6 ppb (26) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 2.0 ppb (2) 0.74 ppb (8) N/A 4.0 μg/m3 (17) 44.0
 
Jan. 15, 2020, 3 p.m. 59.5 ppb (56) 39.8 ppb (37) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) 0.74 ppb (8) N/A 1.0 μg/m3 (4) 56.0
 
Jan. 15, 2020, 2 p.m. 45.8 ppb (42) 27.9 ppb (26) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 0.0 ppb (0) 0.55 ppb (6) N/A 5.0 μg/m3 (21) 42.0
 
Jan. 15, 2020, 1 p.m. 30.3 ppb (28) 14.1 ppb (13) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 0.0 ppb (0) 0.44 ppb (5) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 15, 2020, noon 10.2 ppb (9) 0.4 ppb (0) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 9.0 ppb (7) 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 15, 2020, 11 a.m. 10.6 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 2.0 ppb (3) 10.0 ppb (8) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, 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
 
Jan. 15, 2020, 9 a.m. 7.5 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (12) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 15, 2020, 8 a.m. 8.9 ppb (8) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 14.0 ppb (11) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 15, 2020, 7 a.m. 8.2 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 16.0 ppb (12) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2020, 6 a.m. 7.4 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2020, 5 a.m. 9.8 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.37 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2020, 4 a.m. 10.4 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (15) 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2020, 3 a.m. 13.9 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 14.0 ppb (11) 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, 2 a.m. 9.5 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2020, 1 a.m. 7.3 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.38 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, midnight 5.0 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 34.0 ppb (26) 0.37 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 14, 2020, 11 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 14, 2020, 10 p.m. 4.9 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 14, 2020, 9 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2020, 8 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 14, 2020, 7 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 14, 2020, 6 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 14, 2020, 5 p.m. 5.6 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (25) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 14, 2020, 4 p.m. 14.3 ppb (13) 2.6 ppb (2) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 22.0 ppb (17) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2020, 3 p.m. 12.0 ppb (11) 1.2 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 25.0 ppb (19) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 14, 2020, 2 p.m. 6.1 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2020, 1 p.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.3 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2020, noon 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 14, 2020, 11 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2020, 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