ID: 2411

AQSQID: 060850006

Site Name: San Jose - Knox Ave

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

Updated: April 10, 2021, 10:43 a.m.

Location: San Jose (E San Jose), CA

Reporting: True, Located: True

Current AQI: 25.0

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
April 10, 2021, 8 a.m. 3.5 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 7 a.m. 3.6 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 6 a.m. 4.9 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 10, 2021, 5 a.m. 5.5 ppb (6) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
April 10, 2021, 4 a.m. 4.3 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 10, 2021, 3 a.m. 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 10, 2021, 2 a.m. 9.9 ppb (10) 1.6 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.46 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 10, 2021, 1 a.m. 11.1 ppb (11) 2.3 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.46 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
April 10, 2021, midnight 11.7 ppb (12) 2.9 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.45 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 9, 2021, 11 p.m. 11.7 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.45 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
April 9, 2021, 10 p.m. 10.8 ppb (11) 2.9 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.45 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
April 9, 2021, 9 p.m. 8.4 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 9, 2021, 8 p.m. 8.5 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 9, 2021, 7 p.m. 10.6 ppb (10) 2.6 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.4 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 9, 2021, 6 p.m. 8.4 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.37 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 9, 2021, 5 p.m. 12.0 ppb (12) 3.5 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 4 p.m. 15.0 ppb (15) 4.5 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 9, 2021, 3 p.m. 19.9 ppb (19) 5.2 ppb (5) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 9, 2021, 2 p.m. 61.1 ppb (59) 33.2 ppb (32) N/A 28.0 ppb (27) N/A N/A N/A 0.91 ppb (11) N/A 18.0 μg/m3 (64) 64.0
 
April 9, 2021, 1 p.m. 57.8 ppb (56) 31.5 ppb (30) N/A 26.0 ppb (25) N/A N/A N/A 0.79 ppb (10) N/A 13.0 μg/m3 (53) 56.0
 
April 9, 2021, noon 29.6 ppb (28) 7.8 ppb (8) N/A 22.0 ppb (21) N/A N/A N/A 0.62 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 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
 
April 9, 2021, 10 a.m. 13.7 ppb (13) 1.2 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 9 a.m. 15.6 ppb (15) 1.5 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.46 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 8 a.m. 15.3 ppb (15) 1.1 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.48 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 7 a.m. 13.3 ppb (13) 1.1 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
April 9, 2021, 6 a.m. 8.1 ppb (8) 0.1 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 5 a.m. 14.4 ppb (14) 1.6 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A 0.48 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 9, 2021, 4 a.m. 19.5 ppb (19) 3.8 ppb (4) N/A 16.0 ppb (16) N/A N/A N/A 0.52 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
April 9, 2021, 3 a.m. 17.3 ppb (17) 2.6 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.53 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 9, 2021, 2 a.m. 15.9 ppb (15) 2.1 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.55 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
April 9, 2021, 1 a.m. 8.0 ppb (8) 1.3 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.4 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 9, 2021, midnight 12.2 ppb (12) 2.9 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
April 8, 2021, 11 p.m. 12.6 ppb (12) 3.3 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2021, 10 p.m. 10.3 ppb (10) 2.3 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 8, 2021, 9 p.m. 10.9 ppb (11) 2.9 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.37 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 8, 2021, 8 p.m. 8.7 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 8, 2021, 7 p.m. 10.9 ppb (11) 3.0 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 8, 2021, 6 p.m. 11.3 ppb (11) 3.4 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 8, 2021, 5 p.m. 11.2 ppb (11) 3.5 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 8, 2021, 4 p.m. 12.9 ppb (13) 3.8 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.37 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2021, 3 p.m. 38.2 ppb (37) 14.2 ppb (14) N/A 24.0 ppb (23) N/A N/A N/A 0.58 ppb (7) N/A 8.0 μg/m3 (34) 37.0
 
April 8, 2021, 2 p.m. 47.4 ppb (45) 19.2 ppb (19) N/A 28.0 ppb (27) N/A N/A N/A 0.7 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
April 8, 2021, 1 p.m. 43.2 ppb (41) 16.1 ppb (16) N/A 27.0 ppb (26) N/A N/A N/A 0.63 ppb (7) N/A 9.0 μg/m3 (38) 41.0
 
April 8, 2021, noon 32.2 ppb (31) 11.5 ppb (11) N/A 21.0 ppb (20) N/A N/A N/A 0.53 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 8, 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
 
April 8, 2021, 10 a.m. 6.2 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 8, 2021, 9 a.m. 2.9 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 8 a.m. 3.8 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2021, 7 a.m. 3.4 ppb (4) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 8, 2021, 6 a.m. 4.3 ppb (5) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 5 a.m. 4.5 ppb (5) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2021, 4 a.m. 6.1 ppb (6) 0.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 8, 2021, 3 a.m. 11.7 ppb (12) 1.8 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 2 a.m. 11.5 ppb (11) 1.5 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.46 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2021, 1 a.m. 11.4 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.46 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 8, 2021, midnight 10.4 ppb (10) 2.2 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 7, 2021, 11 p.m. 11.6 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2021, 10 p.m. 10.4 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.4 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 7, 2021, 9 p.m. 12.2 ppb (12) 3.2 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
 
April 7, 2021, 8 p.m. 10.9 ppb (11) 2.3 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 7, 2021, 7 p.m. 10.6 ppb (10) 2.4 ppb (3) 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
 
April 7, 2021, 6 p.m. 11.1 ppb (11) 2.7 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 7, 2021, 5 p.m. 13.5 ppb (13) 4.1 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.38 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
April 7, 2021, 4 p.m. 11.7 ppb (12) 3.4 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 7, 2021, 3 p.m. 14.8 ppb (14) 3.7 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 7, 2021, 2 p.m. 17.5 ppb (17) 3.8 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2021, 1 p.m. 17.0 ppb (17) 3.4 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 7, 2021, noon 7.5 ppb (8) 1.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2021, 10 a.m. 2.7 ppb (3) 0.1 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
 
April 7, 2021, 9 a.m. 4.1 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
April 7, 2021, 8 a.m. 4.8 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
April 7, 2021, 7 a.m. 4.0 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
April 7, 2021, 6 a.m. 7.0 ppb (7) 0.5 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
April 7, 2021, 5 a.m. 7.8 ppb (8) 1.0 ppb (1) 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
 
April 7, 2021, 4 a.m. 10.0 ppb (10) 1.6 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2021, 3 a.m. 11.6 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.47 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2021, 2 a.m. 15.2 ppb (15) 3.1 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.55 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
April 7, 2021, 1 a.m. 11.2 ppb (11) 2.3 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 7, 2021, midnight 12.9 ppb (13) 3.1 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
April 6, 2021, 11 p.m. 13.1 ppb (13) 3.1 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.49 ppb (6) N/A 18.0 μg/m3 (64) 64.0
 
April 6, 2021, 10 p.m. 12.6 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.47 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 9 p.m. 14.4 ppb (14) 3.7 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 8 p.m. 8.8 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 6, 2021, 7 p.m. 12.3 ppb (12) 3.6 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 6, 2021, 6 p.m. 9.3 ppb (9) 2.6 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 5 p.m. 7.7 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 6, 2021, 4 p.m. 10.1 ppb (10) 2.6 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 3 p.m. 10.1 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 2 p.m. 8.7 ppb (9) 1.6 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 6, 2021, 1 p.m. 4.4 ppb (5) 0.2 ppb (1) 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
 
April 6, 2021, noon 3.0 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 10 a.m. 1.2 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 6, 2021, 9 a.m. 1.8 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 8 a.m. 1.7 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 7 a.m. 2.8 ppb (3) 0.3 ppb (1) 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
 
April 6, 2021, 6 a.m. 3.7 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 5 a.m. 4.2 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
April 6, 2021, 4 a.m. 6.0 ppb (6) 0.4 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 6, 2021, 3 a.m. 8.5 ppb (9) 1.1 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 2 a.m. 9.9 ppb (10) 1.8 ppb (2) 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
 
April 6, 2021, 1 a.m. 10.5 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.45 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2021, midnight 11.9 ppb (12) 3.9 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 11 p.m. 11.3 ppb (11) 3.3 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 10 p.m. 10.2 ppb (10) 2.9 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 5, 2021, 9 p.m. 8.3 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 8 p.m. 7.8 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 7 p.m. 7.2 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 5, 2021, 6 p.m. 6.8 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (4) N/A N/A 7.0
 
April 5, 2021, 5 p.m. 9.8 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 4 p.m. 14.7 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 3 p.m. 23.8 ppb (23) 7.9 ppb (8) N/A 16.0 ppb (16) N/A N/A N/A 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 5, 2021, 2 p.m. 28.4 ppb (27) 9.3 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.48 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
April 5, 2021, 1 p.m. 16.8 ppb (16) 3.6 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.4 ppb (5) N/A 3.0 μg/m3 (13) 16.0
 
April 5, 2021, noon 15.5 ppb (15) 4.2 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.38 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2021, 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
 
April 5, 2021, 10 a.m. 4.8 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 5, 2021, 9 a.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 5, 2021, 8 a.m. 3.2 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2021, 7 a.m. 3.0 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
April 5, 2021, 6 a.m. 5.2 ppb (5) 0.4 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2021, 5 a.m. 3.9 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 5, 2021, 4 a.m. 5.6 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 3 a.m. 4.6 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 2 a.m. 5.1 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
April 5, 2021, 1 a.m. 6.5 ppb (7) 1.4 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
 
April 5, 2021, midnight 6.6 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 11 p.m. 8.2 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 10 p.m. 7.1 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
April 4, 2021, 9 p.m. 5.1 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2021, 8 p.m. 5.0 ppb (5) 1.2 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
 
April 4, 2021, 7 p.m. 5.0 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2021, 6 p.m. 4.8 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2021, 5 p.m. 4.7 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
April 4, 2021, 4 p.m. 4.7 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 3 p.m. 8.4 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 4, 2021, 2 p.m. 7.4 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 1 p.m. 4.8 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 4, 2021, noon 4.1 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 4, 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
 
April 4, 2021, 10 a.m. 2.1 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 4, 2021, 9 a.m. 2.1 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2021, 8 a.m. 3.7 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 4, 2021, 7 a.m. 5.3 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 4, 2021, 6 a.m. 6.6 ppb (7) 0.3 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2021, 5 a.m. 3.9 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2021, 4 a.m. 4.6 ppb (5) 0.2 ppb (1) 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
 
April 4, 2021, 3 a.m. 5.7 ppb (6) 0.5 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2021, 2 a.m. 4.4 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 4, 2021, 1 a.m. 5.9 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, midnight 8.5 ppb (9) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 11 p.m. 10.1 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.45 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 10 p.m. 8.5 ppb (9) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2021, 9 p.m. 8.5 ppb (9) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
April 3, 2021, 8 p.m. 7.6 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 7 p.m. 7.0 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 3, 2021, 6 p.m. 7.1 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 3, 2021, 5 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 4 p.m. 5.9 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
April 3, 2021, 3 p.m. 14.6 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
April 3, 2021, 2 p.m. 13.1 ppb (13) 3.3 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.38 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 3, 2021, 1 p.m. 11.7 ppb (12) 2.7 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.38 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 3, 2021, noon 7.7 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 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
 
April 3, 2021, 10 a.m. 1.9 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 9 a.m. 3.0 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0