AQSQID: 060850006

Site Name: San Jose - Knox Ave

Location: San José, CA

Reporting: True, Located: True

Current AQI: 24.0

San José CA, US: 37.338202, -121.849892

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2019, 5 a.m. 25.8 ppb (24) 6.2 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.77 ppb (9) N/A N/A 24.0
 
Sept. 21, 2019, 4 a.m. 26.3 ppb (24) 7.8 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.73 ppb (8) N/A N/A 24.0
 
Sept. 21, 2019, 3 a.m. 17.3 ppb (16) 3.1 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A N/A 16.0
 
Sept. 21, 2019, 2 a.m. 16.2 ppb (15) 2.3 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.6 ppb (7) N/A N/A 15.0
 
Sept. 21, 2019, 1 a.m. 18.4 ppb (17) 3.5 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.59 ppb (7) N/A N/A 17.0
 
Sept. 21, 2019, midnight 18.2 ppb (17) 2.9 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.6 ppb (7) N/A N/A 17.0
 
Sept. 20, 2019, 11 p.m. 20.5 ppb (19) 4.3 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.61 ppb (7) N/A N/A 19.0
 
Sept. 20, 2019, 10 p.m. 17.4 ppb (16) 3.7 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A 0.57 ppb (6) N/A N/A 16.0
 
Sept. 20, 2019, 9 p.m. 16.5 ppb (15) 3.9 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.55 ppb (6) N/A N/A 15.0
 
Sept. 20, 2019, 8 p.m. 16.9 ppb (16) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.49 ppb (5) N/A N/A 16.0
 
Sept. 20, 2019, 7 p.m. 22.7 ppb (21) 8.2 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.55 ppb (6) N/A N/A 21.0
 
Sept. 20, 2019, 6 p.m. 30.6 ppb (28) 11.8 ppb (11) N/A 19.0 ppb (18) N/A N/A N/A 0.61 ppb (7) N/A N/A 28.0
 
Sept. 20, 2019, 5 p.m. 36.8 ppb (34) 16.9 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A 0.65 ppb (7) N/A N/A 34.0
 
Sept. 20, 2019, 4 p.m. 38.7 ppb (36) 19.9 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.71 ppb (8) N/A N/A 36.0
 
Sept. 20, 2019, 3 p.m. 54.9 ppb (51) 33.4 ppb (31) N/A 22.0 ppb (20) N/A N/A N/A 0.91 ppb (10) N/A N/A 51.0
 
Sept. 20, 2019, 2 p.m. 53.1 ppb (49) 31.6 ppb (29) N/A 22.0 ppb (20) N/A N/A N/A 0.86 ppb (10) N/A N/A 49.0
 
Sept. 20, 2019, 1 p.m. 49.6 ppb (46) 27.9 ppb (26) N/A 22.0 ppb (20) N/A N/A N/A 0.79 ppb (9) N/A N/A 46.0
 
Sept. 20, 2019, noon 44.7 ppb (41) 26.1 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.75 ppb (8) N/A N/A 41.0
 
Sept. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 20, 2019, 10 a.m. 10.2 ppb (9) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A N/A 9.0
 
Sept. 20, 2019, 9 a.m. 8.1 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A N/A 8.0
 
Sept. 20, 2019, 8 a.m. 8.2 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.46 ppb (5) N/A N/A 8.0
 
Sept. 20, 2019, 7 a.m. 14.3 ppb (13) 0.7 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A N/A 13.0
 
Sept. 20, 2019, 6 a.m. 18.9 ppb (18) 2.7 ppb (3) N/A 16.0 ppb (15) N/A N/A N/A 0.83 ppb (9) N/A N/A 18.0
 
Sept. 20, 2019, 5 a.m. 17.3 ppb (16) 2.6 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.59 ppb (7) N/A N/A 16.0
 
Sept. 20, 2019, 4 a.m. 18.6 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.64 ppb (7) N/A N/A 17.0
 
Sept. 20, 2019, 3 a.m. 21.9 ppb (20) 5.5 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A 0.63 ppb (7) N/A N/A 20.0
 
Sept. 20, 2019, 2 a.m. 20.0 ppb (19) 4.3 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.62 ppb (7) N/A N/A 19.0
 
Sept. 20, 2019, 1 a.m. 18.6 ppb (17) 4.5 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.59 ppb (7) N/A N/A 17.0
 
Sept. 20, 2019, midnight 17.2 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.6 ppb (7) N/A N/A 16.0
 
Sept. 19, 2019, 11 p.m. 17.7 ppb (16) 4.5 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.57 ppb (6) N/A N/A 16.0
 
Sept. 19, 2019, 10 p.m. 12.3 ppb (11) 3.1 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.5 ppb (6) N/A N/A 11.0
 
Sept. 19, 2019, 9 p.m. 13.9 ppb (13) 4.1 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.49 ppb (5) N/A N/A 13.0
 
Sept. 19, 2019, 8 p.m. 18.3 ppb (17) 7.3 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.51 ppb (6) N/A N/A 17.0
 
Sept. 19, 2019, 7 p.m. 14.5 ppb (13) 5.7 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A N/A 13.0
 
Sept. 19, 2019, 6 p.m. 19.9 ppb (18) 8.6 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A 0.49 ppb (5) N/A N/A 18.0
 
Sept. 19, 2019, 5 p.m. 26.1 ppb (24) 11.1 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A 0.57 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2019, 4 p.m. 23.1 ppb (21) 10.1 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.55 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2019, 3 p.m. 42.3 ppb (39) 23.3 ppb (22) N/A 19.0 ppb (18) N/A N/A N/A 0.76 ppb (8) N/A 4.0 μg/m3 (17) 39.0
 
Sept. 19, 2019, 2 p.m. 51.4 ppb (48) 32.5 ppb (30) N/A 19.0 ppb (18) N/A N/A N/A 0.86 ppb (10) N/A 4.0 μg/m3 (17) 48.0
 
Sept. 19, 2019, 1 p.m. 63.2 ppb (60) 40.6 ppb (38) N/A 23.0 ppb (21) N/A N/A N/A 0.84 ppb (9) N/A 5.0 μg/m3 (21) 60.0
 
Sept. 19, 2019, noon 21.3 ppb (20) 5.5 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A 0.58 ppb (6) N/A 0.0 μg/m3 (0) 20.0
 
Sept. 19, 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
 
Sept. 19, 2019, 10 a.m. 17.8 ppb (16) 5.3 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.48 ppb (5) N/A 3.0 μg/m3 (12) 16.0
 
Sept. 19, 2019, 9 a.m. 20.3 ppb (19) 4.9 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2019, 8 a.m. 10.1 ppb (9) 1.4 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.46 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 7 a.m. 11.6 ppb (11) 2.1 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2019, 6 a.m. 7.9 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.47 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2019, 5 a.m. 8.1 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 8.0
 
Sept. 19, 2019, 4 a.m. 15.2 ppb (14) 3.6 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.59 ppb (7) N/A 0.0 μg/m3 (0) 14.0
 
Sept. 19, 2019, 3 a.m. 10.1 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.49 ppb (5) N/A 2.0 μg/m3 (8) 9.0
 
Sept. 19, 2019, 2 a.m. 9.5 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.49 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2019, 1 a.m. 12.4 ppb (11) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.51 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2019, midnight 12.4 ppb (11) 4.4 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.51 ppb (6) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 18, 2019, 11 p.m. 13.8 ppb (13) 4.4 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.52 ppb (6) N/A 1.0 μg/m3 (4) 13.0
 
Sept. 18, 2019, 10 p.m. 15.0 ppb (14) 5.2 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.55 ppb (6) N/A 1.0 μg/m3 (4) 14.0
 
Sept. 18, 2019, 9 p.m. 19.0 ppb (18) 7.8 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.6 ppb (7) N/A 3.0 μg/m3 (12) 18.0
 
Sept. 18, 2019, 8 p.m. 17.3 ppb (16) 7.1 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.52 ppb (6) N/A 2.0 μg/m3 (8) 16.0
 
Sept. 18, 2019, 7 p.m. 18.5 ppb (17) 8.1 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 6 p.m. 10.7 ppb (10) 3.8 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.47 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, 5 p.m. 15.3 ppb (14) 7.0 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.48 ppb (5) N/A 3.0 μg/m3 (12) 14.0
 
Sept. 18, 2019, 4 p.m. 29.4 ppb (27) 15.1 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.59 ppb (7) N/A 5.0 μg/m3 (21) 27.0
 
Sept. 18, 2019, 3 p.m. 34.4 ppb (32) 17.6 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A 0.64 ppb (7) N/A 3.0 μg/m3 (12) 32.0
 
Sept. 18, 2019, 2 p.m. 38.6 ppb (36) 19.4 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.69 ppb (8) N/A 4.0 μg/m3 (17) 36.0
 
Sept. 18, 2019, 1 p.m. 32.4 ppb (30) 15.6 ppb (14) N/A 17.0 ppb (16) N/A N/A N/A 0.68 ppb (8) N/A 5.0 μg/m3 (21) 30.0
 
Sept. 18, 2019, noon 34.4 ppb (32) 19.3 ppb (18) N/A 15.0 ppb (14) N/A N/A N/A 0.65 ppb (7) N/A 6.0 μg/m3 (25) 32.0
 
Sept. 18, 2019, 11 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
 
Sept. 18, 2019, 10 a.m. 15.5 ppb (14) 5.1 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.48 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 9 a.m. 19.2 ppb (18) 5.3 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (12) 18.0
 
Sept. 18, 2019, 8 a.m. 7.3 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A -2.0 μg/m3 (0) 7.0
 
Sept. 18, 2019, 7 a.m. 8.5 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.46 ppb (5) N/A 0.0 μg/m3 (0) 8.0
 
Sept. 18, 2019, 6 a.m. 6.9 ppb (6) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.45 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 18, 2019, 5 a.m. 6.2 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 6.0
 
Sept. 18, 2019, 4 a.m. 7.4 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.47 ppb (5) N/A 1.0 μg/m3 (4) 7.0
 
Sept. 18, 2019, 3 a.m. 7.9 ppb (7) 0.8 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
 
Sept. 18, 2019, 2 a.m. 8.7 ppb (8) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.46 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 1 a.m. 10.9 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, midnight 12.4 ppb (11) 3.9 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 17, 2019, 11 p.m. 14.2 ppb (13) 4.7 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.51 ppb (6) N/A 0.0 μg/m3 (0) 13.0
 
Sept. 17, 2019, 10 p.m. 12.5 ppb (12) 3.1 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.47 ppb (5) N/A 0.0 μg/m3 (0) 12.0
 
Sept. 17, 2019, 9 p.m. 12.8 ppb (12) 4.1 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 12.0
 
Sept. 17, 2019, 8 p.m. 15.1 ppb (14) 4.8 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.45 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 7 p.m. 20.3 ppb (19) 7.5 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.51 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 6 p.m. 27.7 ppb (26) 11.1 ppb (10) N/A 17.0 ppb (16) N/A N/A N/A 0.59 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 17, 2019, 5 p.m. 26.4 ppb (24) 11.8 ppb (11) N/A 15.0 ppb (14) N/A N/A N/A 0.56 ppb (6) N/A 5.0 μg/m3 (21) 24.0
 
Sept. 17, 2019, 4 p.m. 30.4 ppb (28) 15.4 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A 0.65 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 3 p.m. 44.9 ppb (42) 26.2 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.73 ppb (8) N/A 9.0 μg/m3 (38) 42.0
 
Sept. 17, 2019, 2 p.m. 39.8 ppb (37) 25.3 ppb (23) N/A 15.0 ppb (14) N/A N/A N/A 0.69 ppb (8) N/A 5.0 μg/m3 (21) 37.0
 
Sept. 17, 2019, 1 p.m. 33.8 ppb (31) 21.3 ppb (20) N/A 13.0 ppb (12) N/A N/A N/A 0.64 ppb (7) N/A 5.0 μg/m3 (21) 31.0
 
Sept. 17, 2019, noon 34.9 ppb (32) 21.3 ppb (20) N/A 14.0 ppb (13) N/A N/A N/A 0.58 ppb (6) N/A 5.0 μg/m3 (21) 32.0
 
Sept. 17, 2019, 11 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
 
Sept. 17, 2019, 10 a.m. 13.1 ppb (12) 1.5 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.41 ppb (5) N/A 2.0 μg/m3 (8) 12.0
 
Sept. 17, 2019, 9 a.m. 12.6 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, 8 a.m. 11.4 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, 7 a.m. 12.3 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.46 ppb (5) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 17, 2019, 6 a.m. 10.5 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.46 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 5 a.m. 15.0 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (12) 14.0
 
Sept. 17, 2019, 4 a.m. 13.5 ppb (12) 1.8 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 17, 2019, 3 a.m. 10.3 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, 2 a.m. 7.2 ppb (7) 0.9 ppb (1) 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
 
Sept. 17, 2019, 1 a.m. 7.2 ppb (7) 1.6 ppb (1) 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
 
Sept. 17, 2019, midnight 8.8 ppb (8) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 16, 2019, 11 p.m. 10.3 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.47 ppb (5) N/A 2.0 μg/m3 (8) 10.0
 
Sept. 16, 2019, 10 p.m. 10.2 ppb (9) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.47 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 9 p.m. 9.0 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 8 p.m. 11.9 ppb (11) 3.9 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 7 p.m. 10.3 ppb (10) 3.1 ppb (3) 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
 
Sept. 16, 2019, 6 p.m. 8.9 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 8.0
 
Sept. 16, 2019, 5 p.m. 8.6 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.45 ppb (5) N/A -1.0 μg/m3 (0) 8.0
 
Sept. 16, 2019, 4 p.m. 10.6 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.46 ppb (5) N/A 0.0 μg/m3 (0) 10.0
 
Sept. 16, 2019, 3 p.m. 21.9 ppb (20) 7.2 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.56 ppb (6) N/A 0.0 μg/m3 (0) 20.0
 
Sept. 16, 2019, 2 p.m. 23.6 ppb (22) 10.9 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.57 ppb (6) N/A -1.0 μg/m3 (0) 22.0
 
Sept. 16, 2019, 1 p.m. 15.0 ppb (14) 6.1 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.51 ppb (6) N/A 1.0 μg/m3 (4) 14.0
 
Sept. 16, 2019, noon 13.6 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.48 ppb (5) N/A 2.0 μg/m3 (8) 13.0
 
Sept. 16, 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
Sept. 16, 2019, 10 a.m. 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 16, 2019, 9 a.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.38 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 16, 2019, 8 a.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.38 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 16, 2019, 7 a.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.4 ppb (4) N/A -1.0 μg/m3 (0) 4.0
 
Sept. 16, 2019, 6 a.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.39 ppb (4) N/A 0.0 μg/m3 (0) 4.0
 
Sept. 16, 2019, 5 a.m. 6.2 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.47 ppb (5) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 16, 2019, 4 a.m. 9.9 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.54 ppb (6) N/A 0.0 μg/m3 (0) 9.0
 
Sept. 16, 2019, 3 a.m. 6.2 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.5 ppb (6) N/A -2.0 μg/m3 (0) 6.0
 
Sept. 16, 2019, 2 a.m. 10.0 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.55 ppb (6) N/A 1.0 μg/m3 (4) 9.0
 
Sept. 16, 2019, 1 a.m. 7.5 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.53 ppb (6) N/A 0.0 μg/m3 (0) 7.0
 
Sept. 16, 2019, midnight 5.8 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.46 ppb (5) N/A -1.0 μg/m3 (0) 5.0
 
Sept. 15, 2019, 11 p.m. 5.7 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 5.0
 
Sept. 15, 2019, 10 p.m. 6.2 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.45 ppb (5) N/A 1.0 μg/m3 (4) 6.0
 
Sept. 15, 2019, 9 p.m. 6.0 ppb (6) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.46 ppb (5) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 15, 2019, 8 p.m. 7.5 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.49 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 7 p.m. 6.7 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.46 ppb (5) N/A 1.0 μg/m3 (4) 6.0
 
Sept. 15, 2019, 6 p.m. 7.4 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.45 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 15, 2019, 5 p.m. 6.9 ppb (6) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.45 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 4 p.m. 6.7 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.45 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 3 p.m. 5.4 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.45 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 2 p.m. 7.5 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.45 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 1 p.m. 10.5 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.47 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, noon 8.7 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 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
 
Sept. 15, 2019, 10 a.m. 7.8 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 9 a.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.39 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 8 a.m. 6.5 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 15, 2019, 7 a.m. 8.5 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 15, 2019, 6 a.m. 13.6 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 5 a.m. 12.9 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.66 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2019, 4 a.m. 18.1 ppb (17) 5.1 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.73 ppb (8) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2019, 3 a.m. 18.2 ppb (17) 5.8 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.71 ppb (8) N/A 3.0 μg/m3 (12) 17.0
 
Sept. 15, 2019, 2 a.m. 15.1 ppb (14) 4.5 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.64 ppb (7) N/A 2.0 μg/m3 (8) 14.0
 
Sept. 15, 2019, 1 a.m. 14.8 ppb (14) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.65 ppb (7) N/A 0.0 μg/m3 (0) 14.0
 
Sept. 15, 2019, midnight 13.7 ppb (13) 4.1 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.55 ppb (6) N/A 0.0 μg/m3 (0) 13.0
 
Sept. 14, 2019, 11 p.m. 13.2 ppb (12) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.56 ppb (6) N/A 2.0 μg/m3 (8) 12.0
 
Sept. 14, 2019, 10 p.m. 12.0 ppb (11) 2.4 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.57 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2019, 9 p.m. 12.5 ppb (12) 1.6 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.6 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 14, 2019, 8 p.m. 19.6 ppb (18) 2.7 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.7 ppb (8) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 14, 2019, 7 p.m. 24.5 ppb (23) 2.4 ppb (2) N/A 22.0 ppb (20) N/A N/A N/A 0.7 ppb (8) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 14, 2019, 6 p.m. 20.8 ppb (19) 2.7 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.64 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2019, 5 p.m. 24.4 ppb (23) 4.3 ppb (4) N/A 20.0 ppb (19) N/A N/A N/A 0.67 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 4 p.m. 26.8 ppb (25) 5.9 ppb (5) N/A 21.0 ppb (19) N/A N/A N/A 0.68 ppb (8) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 14, 2019, 3 p.m. 43.7 ppb (40) 15.1 ppb (14) N/A 29.0 ppb (27) N/A N/A N/A 0.89 ppb (10) N/A 8.0 μg/m3 (33) 40.0
 
Sept. 14, 2019, 2 p.m. 61.5 ppb (58) 34.0 ppb (31) N/A 28.0 ppb (26) N/A N/A N/A 1.19 ppb (13) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 14, 2019, 1 p.m. 48.5 ppb (45) 23.0 ppb (21) N/A 26.0 ppb (24) N/A N/A N/A 1.17 ppb (13) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 14, 2019, noon 46.1 ppb (43) 18.1 ppb (17) N/A 28.0 ppb (26) N/A N/A N/A 1.07 ppb (12) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Sept. 14, 2019, 10 a.m. 30.5 ppb (28) 3.6 ppb (3) N/A 27.0 ppb (25) N/A N/A N/A 0.88 ppb (10) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 14, 2019, 9 a.m. 30.4 ppb (28) 5.1 ppb (5) N/A 25.0 ppb (23) N/A N/A N/A 0.92 ppb (10) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 14, 2019, 8 a.m. 16.3 ppb (15) 0.2 ppb (0) N/A 16.0 ppb (15) N/A N/A N/A 0.69 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 14, 2019, 7 a.m. 19.9 ppb (18) 0.3 ppb (0) N/A 20.0 ppb (19) N/A N/A N/A 0.81 ppb (9) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 6 a.m. 30.2 ppb (28) 0.4 ppb (0) N/A 30.0 ppb (28) N/A N/A N/A 1.09 ppb (12) N/A 19.0 μg/m3 (65) 65.0