ID: 2411

AQSQID: 060850006

Site Name: San Jose - Knox Ave

Added: April 21, 2020, 6:24 p.m.

Updated: Sept. 21, 2021, 4:06 p.m.

Location: San Jose (E San Jose), CA

Reporting: True, Located: True

Current AQI: 58.0

San Jose (E San Jose) 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, 2021, 2 p.m. 52.0 ppb (50) 28.8 ppb (28) N/A 23.0 ppb (22) N/A N/A N/A 1.0 ppb (12) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 21, 2021, 1 p.m. 71.0 ppb (70) 42.3 ppb (40) N/A 29.0 ppb (28) N/A N/A N/A 1.06 ppb (13) N/A 14.0 μg/m3 (55) 70.0
 
Sept. 21, 2021, noon 53.4 ppb (51) 27.3 ppb (26) N/A 26.0 ppb (25) N/A N/A N/A 0.9 ppb (11) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 21, 2021, 10 a.m. 43.4 ppb (41) 15.3 ppb (15) N/A 28.0 ppb (27) N/A N/A N/A 0.85 ppb (10) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 21, 2021, 9 a.m. 41.8 ppb (40) 13.3 ppb (13) N/A 29.0 ppb (28) N/A N/A N/A 0.74 ppb (8) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 21, 2021, 8 a.m. 25.2 ppb (24) 2.5 ppb (3) N/A 23.0 ppb (22) N/A N/A N/A 0.67 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2021, 7 a.m. 37.8 ppb (36) 7.6 ppb (8) N/A 30.0 ppb (29) N/A N/A N/A 0.9 ppb (11) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 21, 2021, 6 a.m. 22.2 ppb (21) 0.5 ppb (1) N/A 22.0 ppb (21) N/A N/A N/A 0.71 ppb (8) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 21, 2021, 5 a.m. 34.0 ppb (33) 1.5 ppb (2) N/A 33.0 ppb (32) N/A N/A N/A 0.87 ppb (11) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 21, 2021, 4 a.m. 24.2 ppb (23) 0.3 ppb (1) N/A 24.0 ppb (23) N/A N/A N/A 0.69 ppb (8) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 21, 2021, 3 a.m. 23.6 ppb (23) 2.4 ppb (3) N/A 21.0 ppb (20) N/A N/A N/A 0.66 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2021, 2 a.m. 24.8 ppb (24) 2.3 ppb (3) N/A 23.0 ppb (22) N/A N/A N/A 0.66 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2021, 1 a.m. 23.9 ppb (23) 3.0 ppb (3) N/A 21.0 ppb (20) N/A N/A N/A 0.7 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2021, midnight 18.9 ppb (18) 3.0 ppb (3) N/A 16.0 ppb (16) N/A N/A N/A 0.57 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 11 p.m. 14.9 ppb (15) 2.2 ppb (3) N/A 13.0 ppb (13) N/A N/A N/A 0.47 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 20, 2021, 10 p.m. 11.3 ppb (11) 1.4 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2021, 9 p.m. 14.3 ppb (14) 2.8 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.47 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2021, 8 p.m. 16.4 ppb (16) 4.4 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 7 p.m. 14.6 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (13) 14.0
 
Sept. 20, 2021, 6 p.m. 19.7 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 5 p.m. 31.1 ppb (30) 11.4 ppb (11) N/A 20.0 ppb (19) N/A N/A N/A 0.6 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 20, 2021, 4 p.m. 34.0 ppb (33) 15.1 ppb (15) N/A 19.0 ppb (18) N/A N/A N/A 0.63 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2021, 3 p.m. 55.1 ppb (53) 34.8 ppb (33) N/A 20.0 ppb (19) N/A N/A N/A 0.97 ppb (12) N/A 10.0 μg/m3 (42) 53.0
 
Sept. 20, 2021, 2 p.m. 41.0 ppb (39) 26.0 ppb (25) N/A 15.0 ppb (15) N/A N/A N/A 0.8 ppb (10) N/A 9.0 μg/m3 (38) 39.0
 
Sept. 20, 2021, 1 p.m. 27.8 ppb (27) 15.1 ppb (15) N/A 13.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2021, noon 18.0 ppb (17) 5.7 ppb (6) N/A 12.0 ppb (12) N/A N/A N/A 0.51 ppb (6) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
Sept. 20, 2021, 10 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2021, 9 a.m. 6.8 ppb (7) 0.1 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2021, 8 a.m. 6.2 ppb (6) -0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 7 a.m. 8.0 ppb (8) -0.1 ppb (0) N/A 8.0 ppb (8) N/A N/A N/A 0.41 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2021, 6 a.m. 7.3 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2021, 5 a.m. 5.7 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2021, 4 a.m. 7.4 ppb (7) 0.3 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2021, 3 a.m. 9.3 ppb (9) 1.5 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.45 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2021, 2 a.m. 7.1 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2021, 1 a.m. 9.3 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, midnight 7.7 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 11 p.m. 7.3 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 19, 2021, 10 p.m. 6.8 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 9 p.m. 7.0 ppb (7) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 8 p.m. 8.1 ppb (8) 2.1 ppb (2) 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
 
Sept. 19, 2021, 7 p.m. 7.9 ppb (8) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 6 p.m. 7.6 ppb (8) 2.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 19, 2021, 5 p.m. 6.5 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 4 p.m. 6.8 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 3 p.m. 6.2 ppb (6) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (5) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 2 p.m. 5.6 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (5) N/A 0.0 μg/m3 (0) 6.0
 
Sept. 19, 2021, 1 p.m. 3.2 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, noon 6.3 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 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. 19, 2021, 10 a.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 19, 2021, 9 a.m. 4.7 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 8 a.m. 5.0 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 19, 2021, 7 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 6 a.m. 10.7 ppb (11) 2.7 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.5 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 5 a.m. 13.2 ppb (13) 4.6 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 4 a.m. 11.2 ppb (11) 3.6 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.5 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 3 a.m. 6.0 ppb (6) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 2 a.m. 9.6 ppb (10) 2.7 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.47 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 1 a.m. 7.7 ppb (8) 2.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, midnight 9.8 ppb (10) 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.47 ppb (6) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 18, 2021, 11 p.m. 8.5 ppb (9) 3.4 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.45 ppb (6) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 18, 2021, 10 p.m. 7.9 ppb (8) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.42 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 18, 2021, 9 p.m. 5.7 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 8 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 7 p.m. 5.3 ppb (5) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2021, 6 p.m. 4.5 ppb (5) 1.4 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 18, 2021, 5 p.m. 4.0 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, 4 p.m. 12.0 ppb (12) 4.2 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.43 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 3 p.m. 8.4 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.36 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 18, 2021, 2 p.m. 9.2 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.39 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 18, 2021, 1 p.m. 9.7 ppb (10) 1.4 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.41 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 18, 2021, noon 10.0 ppb (10) 2.1 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.39 ppb (5) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 10 a.m. 3.2 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2021, 9 a.m. 3.7 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 18, 2021, 8 a.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.31 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 7 a.m. 3.7 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 6 a.m. 8.1 ppb (8) 2.5 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 5 a.m. 13.9 ppb (14) 4.3 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.54 ppb (6) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 18, 2021, 4 a.m. 15.1 ppb (15) 4.0 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.61 ppb (7) N/A 21.0 μg/m3 (70) 70.0
 
Sept. 18, 2021, 3 a.m. 16.6 ppb (16) 4.9 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.61 ppb (7) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 18, 2021, 2 a.m. 20.0 ppb (19) 5.5 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.66 ppb (8) N/A 23.0 μg/m3 (74) 74.0
 
Sept. 18, 2021, 1 a.m. 17.2 ppb (17) 3.8 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.66 ppb (8) N/A 21.0 μg/m3 (70) 70.0
 
Sept. 18, 2021, midnight 13.5 ppb (13) 2.7 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A 0.55 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 17, 2021, 11 p.m. 13.3 ppb (13) 2.6 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A 0.58 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 17, 2021, 10 p.m. 16.0 ppb (16) 3.6 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.55 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2021, 9 p.m. 14.5 ppb (14) 3.1 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A 0.51 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2021, 8 p.m. 14.1 ppb (14) 3.3 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.47 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, 7 p.m. 10.3 ppb (10) 2.9 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.39 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 6 p.m. 10.2 ppb (10) 3.4 ppb (4) N/A 7.0 ppb (7) N/A N/A N/A 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2021, 5 p.m. 16.5 ppb (16) 7.0 ppb (7) N/A 10.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, 4 p.m. 16.9 ppb (16) 8.1 ppb (8) N/A 9.0 ppb (9) N/A N/A N/A 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2021, 3 p.m. 12.9 ppb (13) 5.0 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A 0.37 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 17, 2021, 2 p.m. 18.2 ppb (18) 7.4 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 1 p.m. 8.1 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2021, noon 15.5 ppb (15) 6.5 ppb (7) N/A 9.0 ppb (9) N/A N/A N/A 0.41 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 17, 2021, 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. 17, 2021, 10 a.m. 6.8 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 9 a.m. 5.4 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, 8 a.m. 4.4 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 17, 2021, 7 a.m. 6.1 ppb (6) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2021, 6 a.m. 6.0 ppb (6) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 5 a.m. 11.4 ppb (11) 3.3 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2021, 4 a.m. 16.0 ppb (16) 3.8 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.62 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 17, 2021, 3 a.m. 17.5 ppb (17) 4.8 ppb (5) N/A 13.0 ppb (13) N/A N/A N/A 0.58 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 17, 2021, 2 a.m. 15.8 ppb (15) 3.6 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.57 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 17, 2021, 1 a.m. 14.7 ppb (14) 3.3 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.56 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 17, 2021, midnight 12.1 ppb (12) 2.5 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, 11 p.m. 12.0 ppb (12) 2.1 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.48 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 10 p.m. 14.5 ppb (14) 2.7 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.53 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, 9 p.m. 12.4 ppb (12) 2.7 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.45 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 16, 2021, 8 p.m. 10.8 ppb (11) 2.8 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.4 ppb (5) N/A N/A 11.0
 
Sept. 16, 2021, 7 p.m. 12.4 ppb (12) 3.5 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 6 p.m. 14.0 ppb (14) 4.5 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.39 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 5 p.m. 12.1 ppb (12) 3.9 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 16, 2021, 4 p.m. 13.3 ppb (13) 4.4 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.37 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 16, 2021, 3 p.m. 18.3 ppb (18) 6.9 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 16, 2021, 2 p.m. 22.2 ppb (21) 7.8 ppb (8) N/A 14.0 ppb (14) N/A N/A N/A 0.47 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 1 p.m. 20.6 ppb (20) 6.5 ppb (7) N/A 14.0 ppb (14) N/A N/A N/A 0.45 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 16, 2021, noon 16.3 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.4 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, 10 a.m. 7.3 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 9 a.m. 5.7 ppb (6) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 16, 2021, 8 a.m. 5.4 ppb (6) 0.8 ppb (1) 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
 
Sept. 16, 2021, 7 a.m. 6.3 ppb (6) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 6 a.m. 12.4 ppb (12) 2.5 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.45 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 5 a.m. 16.2 ppb (16) 2.8 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.52 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 16, 2021, 4 a.m. 19.3 ppb (19) 3.7 ppb (4) N/A 16.0 ppb (16) N/A N/A N/A 0.58 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 16, 2021, 3 a.m. 17.6 ppb (17) 3.5 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.56 ppb (7) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 2 a.m. 18.2 ppb (18) 4.0 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.6 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 16, 2021, 1 a.m. 16.3 ppb (16) 3.7 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 16, 2021, midnight 14.3 ppb (14) 2.8 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.59 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 15, 2021, 11 p.m. 14.3 ppb (14) 2.4 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.57 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 15, 2021, 10 p.m. 16.1 ppb (16) 2.6 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.59 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 15, 2021, 9 p.m. 15.9 ppb (15) 2.2 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.54 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 8 p.m. 12.8 ppb (13) 2.1 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A 0.46 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 15, 2021, 7 p.m. 11.2 ppb (11) 2.4 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 6 p.m. 15.9 ppb (15) 5.4 ppb (6) N/A 11.0 ppb (11) N/A N/A N/A 0.45 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 5 p.m. 15.8 ppb (15) 6.5 ppb (7) N/A 9.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
Sept. 15, 2021, 4 p.m. 17.2 ppb (17) 7.5 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.46 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 3 p.m. 23.0 ppb (22) 9.9 ppb (10) N/A 13.0 ppb (13) N/A N/A N/A 0.5 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 15, 2021, 2 p.m. 30.9 ppb (30) 16.6 ppb (16) N/A 14.0 ppb (14) N/A N/A N/A 0.62 ppb (7) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 15, 2021, 1 p.m. 31.8 ppb (30) 15.6 ppb (15) N/A 16.0 ppb (16) N/A N/A N/A 0.6 ppb (7) N/A 22.0 μg/m3 (72) 72.0
 
Sept. 15, 2021, noon 25.6 ppb (25) 12.3 ppb (12) N/A 13.0 ppb (13) N/A N/A N/A 0.54 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 10 a.m. 8.6 ppb (9) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 9 a.m. 8.0 ppb (8) 2.3 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 15, 2021, 8 a.m. 7.7 ppb (8) 1.6 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 15, 2021, 7 a.m. 15.5 ppb (15) 3.9 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.43 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 15, 2021, 6 a.m. 14.7 ppb (14) 3.3 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.49 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 15, 2021, 5 a.m. 14.6 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.51 ppb (6) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 15, 2021, 4 a.m. 14.5 ppb (14) 3.4 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.49 ppb (6) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 15, 2021, 3 a.m. 16.7 ppb (16) 3.4 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.56 ppb (7) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 15, 2021, 2 a.m. 17.9 ppb (17) 4.4 ppb (5) N/A 14.0 ppb (14) N/A N/A N/A 0.64 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 1 a.m. 17.5 ppb (17) 2.6 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.65 ppb (8) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 15, 2021, midnight 15.3 ppb (15) 1.9 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.6 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 14, 2021, 11 p.m. 17.6 ppb (17) 2.7 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.58 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 14, 2021, 10 p.m. 18.2 ppb (18) 3.1 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.63 ppb (7) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 14, 2021, 9 p.m. 19.0 ppb (18) 2.8 ppb (3) N/A 16.0 ppb (16) N/A N/A N/A 0.56 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 14, 2021, 8 p.m. 23.1 ppb (22) 3.7 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.58 ppb (7) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 14, 2021, 7 p.m. 21.1 ppb (20) 4.3 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.53 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 14, 2021, 6 p.m. 22.5 ppb (22) 6.7 ppb (7) N/A 16.0 ppb (16) N/A N/A N/A 0.5 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 14, 2021, 5 p.m. 19.6 ppb (19) 6.5 ppb (7) N/A 13.0 ppb (13) N/A N/A N/A 0.47 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 14, 2021, 4 p.m. 24.3 ppb (23) 11.1 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.47 ppb (6) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 14, 2021, 3 p.m. 31.1 ppb (30) 14.6 ppb (14) N/A 17.0 ppb (17) N/A N/A N/A 0.58 ppb (7) N/A 14.0 μg/m3 (55) 55.0