ID: 2411

AQSQID: 060850006

Site Name: San Jose - Knox Ave

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

Updated: May 27, 2020, 9:33 p.m.

Location: San Jose (E San Jose), CA

Reporting: True, Located: True

Current AQI: 29.0

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
May 20, 2020, 8 p.m. 13.0 ppb (12) 4.8 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (8) 12.0
 
May 20, 2020, 7 p.m. 10.4 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A -1.0 μg/m3 (0) 10.0
 
May 20, 2020, 6 p.m. 14.7 ppb (14) 6.1 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 0.0 μg/m3 (0) 14.0
 
May 20, 2020, 5 p.m. 19.7 ppb (18) 7.6 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
May 20, 2020, 4 p.m. 20.3 ppb (19) 7.4 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2020, 3 p.m. 22.1 ppb (20) 8.1 ppb (8) N/A 14.0 ppb (13) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 20, 2020, 2 p.m. 24.5 ppb (23) 9.1 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 23.0
 
May 20, 2020, 1 p.m. 30.2 ppb (28) 11.7 ppb (11) N/A 19.0 ppb (18) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
May 20, 2020, noon 19.8 ppb (18) 6.9 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.37 ppb (4) N/A 4.0 μg/m3 (17) 18.0
 
May 20, 2020, 11 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
 
May 20, 2020, 10 a.m. 6.1 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 20, 2020, 9 a.m. 4.4 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2020, 8 a.m. 4.5 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 20, 2020, 7 a.m. 5.3 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
May 20, 2020, 6 a.m. 7.3 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 20, 2020, 5 a.m. 7.2 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
May 20, 2020, 4 a.m. 8.7 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 20, 2020, 3 a.m. 7.5 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 20, 2020, 2 a.m. 8.9 ppb (8) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 20, 2020, 1 a.m. 7.9 ppb (7) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 20, 2020, midnight 8.6 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2020, 11 p.m. 7.8 ppb (7) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 1.0 μg/m3 (4) 7.0
 
May 19, 2020, 10 p.m. 7.8 ppb (7) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 0.0 μg/m3 (0) 7.0
 
May 19, 2020, 9 p.m. 8.4 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 0.0 μg/m3 (0) 8.0
 
May 19, 2020, 8 p.m. 7.1 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (3) N/A N/A 7.0
 
May 19, 2020, 7 p.m. 8.8 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2020, 6 p.m. 7.0 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2020, 5 p.m. 13.5 ppb (12) 4.8 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2020, 4 p.m. 19.2 ppb (18) 7.2 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2020, 3 p.m. 30.4 ppb (28) 15.0 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
May 19, 2020, 2 p.m. 38.6 ppb (36) 21.5 ppb (20) N/A 17.0 ppb (16) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (33) 36.0
 
May 19, 2020, 1 p.m. 34.7 ppb (32) 16.7 ppb (15) N/A 18.0 ppb (17) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 32.0
 
May 19, 2020, noon 28.7 ppb (27) 13.0 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
May 19, 2020, 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
 
May 19, 2020, 10 a.m. 6.3 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2020, 9 a.m. 5.0 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2020, 8 a.m. 7.0 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 19, 2020, 7 a.m. 12.0 ppb (11) 2.4 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2020, 6 a.m. 11.6 ppb (11) 2.5 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2020, 5 a.m. 10.1 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2020, 4 a.m. 9.3 ppb (9) 2.4 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
May 19, 2020, 3 a.m. 9.5 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2020, 2 a.m. 8.6 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 19, 2020, 1 a.m. 8.6 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 0.0 μg/m3 (0) 8.0
 
May 19, 2020, midnight 10.2 ppb (9) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 0.0 μg/m3 (0) 9.0
 
May 18, 2020, 11 p.m. 11.1 ppb (10) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 1.0 μg/m3 (4) 10.0
 
May 18, 2020, 10 p.m. 13.5 ppb (12) 5.4 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.37 ppb (4) N/A 0.0 μg/m3 (0) 12.0
 
May 18, 2020, 9 p.m. 12.5 ppb (12) 4.7 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.36 ppb (4) N/A 1.0 μg/m3 (4) 12.0
 
May 18, 2020, 8 p.m. 11.5 ppb (11) 3.8 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 1.0 μg/m3 (4) 11.0
 
May 18, 2020, 7 p.m. 11.7 ppb (11) 4.5 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 2020, 6 p.m. 13.8 ppb (13) 5.2 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
May 18, 2020, 5 p.m. 14.6 ppb (14) 5.4 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2020, 4 p.m. 18.8 ppb (17) 7.3 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 18, 2020, 3 p.m. 9.5 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A N/A 9.0
 
May 18, 2020, 2 p.m. 20.7 ppb (19) 7.4 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (12) 19.0
 
May 18, 2020, 1 p.m. 24.2 ppb (22) 6.6 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 22.0
 
May 18, 2020, noon 8.5 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
May 18, 2020, 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
 
May 18, 2020, 10 a.m. 5.1 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 18, 2020, 9 a.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 2020, 8 a.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 18, 2020, 7 a.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 18, 2020, 6 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2020, 5 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 18, 2020, 4 a.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 2020, 3 a.m. 8.1 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2020, 2 a.m. 7.1 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 2020, 1 a.m. 8.0 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 18, 2020, midnight 6.1 ppb (6) 2.4 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2020, 11 p.m. 8.1 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.44 ppb (5) N/A 1.0 μg/m3 (4) 8.0
 
May 17, 2020, 10 p.m. 6.5 ppb (6) 3.2 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (4) 6.0
 
May 17, 2020, 9 p.m. 5.1 ppb (5) 2.7 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.37 ppb (4) N/A 1.0 μg/m3 (4) 5.0
 
May 17, 2020, 8 p.m. 6.3 ppb (6) 3.1 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.39 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2020, 7 p.m. 7.4 ppb (7) 3.7 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 17, 2020, 6 p.m. 7.2 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2020, 5 p.m. 9.1 ppb (8) 4.8 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2020, 4 p.m. 5.1 ppb (5) 2.6 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 17, 2020, 3 p.m. 5.2 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (4) 5.0
 
May 17, 2020, 2 p.m. 3.8 ppb (4) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
May 17, 2020, 1 p.m. 0.5 ppb (0) 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2020, noon 1.0 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 17, 2020, 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
 
May 17, 2020, 10 a.m. 1.9 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 4.0
 
May 17, 2020, 9 a.m. 1.5 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
May 17, 2020, 8 a.m. 2.2 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
May 17, 2020, 7 a.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.29 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
May 17, 2020, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 1.0 μg/m3 (4) 4.0
 
May 17, 2020, 5 a.m. 6.9 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 17, 2020, 4 a.m. 5.3 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 17, 2020, 3 a.m. 3.0 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 17, 2020, 2 a.m. 2.8 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.3 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
May 17, 2020, 1 a.m. 5.3 ppb (5) 2.5 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.36 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 17, 2020, midnight 6.4 ppb (6) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
May 16, 2020, 11 p.m. 6.7 ppb (6) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.36 ppb (4) N/A 1.0 μg/m3 (4) 6.0
 
May 16, 2020, 10 p.m. 7.7 ppb (7) 3.2 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.4 ppb (4) N/A 0.0 μg/m3 (0) 7.0
 
May 16, 2020, 9 p.m. 7.0 ppb (6) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (4) N/A 0.0 μg/m3 (0) 6.0
 
May 16, 2020, 8 p.m. 7.4 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (4) N/A 1.0 μg/m3 (4) 7.0
 
May 16, 2020, 7 p.m. 5.2 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2020, 6 p.m. 7.2 ppb (7) 3.1 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2020, 5 p.m. 5.8 ppb (5) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2020, 4 p.m. 5.8 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2020, 3 p.m. 9.1 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 16, 2020, 2 p.m. 24.1 ppb (22) 8.8 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2020, 1 p.m. 21.7 ppb (20) 7.3 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2020, noon 12.4 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
May 16, 2020, 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
 
May 16, 2020, 10 a.m. 5.6 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2020, 9 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 16, 2020, 8 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2020, 7 a.m. 4.6 ppb (4) 0.0 ppb (0) 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
 
May 16, 2020, 6 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
May 16, 2020, 5 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 16, 2020, 4 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2020, 3 a.m. 3.7 ppb (3) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 16, 2020, 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 3.0 μg/m3 (12) 12.0
 
May 16, 2020, 1 a.m. 7.5 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 16, 2020, midnight 8.7 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2020, 11 p.m. 7.9 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2020, 10 p.m. 9.1 ppb (8) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2020, 9 p.m. 10.1 ppb (9) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.33 ppb (4) N/A 0.0 μg/m3 (0) 9.0
 
May 15, 2020, 8 p.m. 12.0 ppb (11) 3.5 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (4) 11.0
 
May 15, 2020, 7 p.m. 13.4 ppb (12) 4.3 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 12.0
 
May 15, 2020, 6 p.m. 11.8 ppb (11) 3.5 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 11.0
 
May 15, 2020, 5 p.m. 13.7 ppb (13) 4.6 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 15, 2020, 4 p.m. 12.5 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
May 15, 2020, 3 p.m. 18.6 ppb (17) 6.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.36 ppb (4) N/A 2.0 μg/m3 (8) 17.0
 
May 15, 2020, 2 p.m. 26.1 ppb (24) 8.9 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.47 ppb (5) N/A 3.0 μg/m3 (12) 24.0
 
May 15, 2020, 1 p.m. 29.8 ppb (28) 10.9 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.49 ppb (5) N/A 1.0 μg/m3 (4) 28.0
 
May 15, 2020, noon 14.7 ppb (14) 3.6 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.38 ppb (4) N/A 3.0 μg/m3 (12) 14.0
 
May 15, 2020, 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
 
May 15, 2020, 10 a.m. 5.0 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2020, 9 a.m. 8.5 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 15, 2020, 8 a.m. 5.0 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
May 15, 2020, 7 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2020, 6 a.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
May 15, 2020, 5 a.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.28 ppb (3) N/A 0.0 μg/m3 (0) 3.0
 
May 15, 2020, 4 a.m. 4.7 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
May 15, 2020, 3 a.m. 5.7 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
May 15, 2020, 2 a.m. 7.3 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
May 15, 2020, 1 a.m. 7.6 ppb (7) 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.4 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 15, 2020, midnight 6.0 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 1.0 μg/m3 (4) 6.0
 
May 14, 2020, 11 p.m. 8.2 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 14, 2020, 10 p.m. 8.2 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
May 14, 2020, 9 p.m. 6.8 ppb (6) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 1.0 μg/m3 (4) 6.0
 
May 14, 2020, 8 p.m. 14.4 ppb (13) 6.5 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.4 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2020, 7 p.m. 14.8 ppb (14) 6.6 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2020, 6 p.m. 5.3 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 14, 2020, 5 p.m. 13.0 ppb (12) 4.6 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 14, 2020, 4 p.m. 12.2 ppb (11) 4.1 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 14, 2020, 3 p.m. 30.6 ppb (28) 14.9 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 28.0
 
May 14, 2020, 2 p.m. 32.7 ppb (30) 16.4 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.5 ppb (6) N/A 5.0 μg/m3 (21) 30.0
 
May 14, 2020, 1 p.m. 23.5 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
May 14, 2020, noon 26.9 ppb (25) 12.7 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 25.0
 
May 14, 2020, 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
 
May 14, 2020, 10 a.m. 13.4 ppb (12) 3.4 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
May 14, 2020, 9 a.m. 10.7 ppb (10) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
May 14, 2020, 8 a.m. 12.2 ppb (11) 2.1 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.37 ppb (4) N/A 1.0 μg/m3 (4) 11.0
 
May 14, 2020, 7 a.m. 9.0 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 14, 2020, 6 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 14, 2020, 5 a.m. 11.3 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 14, 2020, 4 a.m. 12.9 ppb (12) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
May 14, 2020, 3 a.m. 9.1 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
May 14, 2020, 2 a.m. 11.2 ppb (10) 4.1 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
May 14, 2020, 1 a.m. 11.2 ppb (10) 4.7 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
May 14, 2020, midnight 11.1 ppb (10) 5.2 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 1.0 μg/m3 (4) 10.0
 
May 13, 2020, 11 p.m. 11.7 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
May 13, 2020, 10 p.m. 15.0 ppb (14) 6.2 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
May 13, 2020, 9 p.m. 16.4 ppb (15) 7.7 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0