AQSQID: 060850006

Site Name: San Jose - Knox Ave

Location: San José, CA

Reporting: False, Located: True

Current AQI: None

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
Jan. 23, 2019, 9 a.m. 46.1 ppb (43) 21.6 ppb (20) N/A 25.0 ppb (23) N/A N/A N/A 0.79 ppb (9) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 23, 2019, 8 a.m. 42.9 ppb (40) 18.6 ppb (17) N/A 24.0 ppb (22) N/A N/A N/A 0.76 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2019, 4 a.m. 38.3 ppb (35) 10.2 ppb (9) N/A 28.0 ppb (26) N/A N/A N/A 0.83 ppb (9) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 23, 2019, 3 a.m. 36.4 ppb (34) 6.7 ppb (6) N/A 30.0 ppb (28) N/A N/A N/A 0.8 ppb (9) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 23, 2019, 2 a.m. 37.2 ppb (34) 5.7 ppb (5) N/A 32.0 ppb (30) N/A N/A N/A 0.77 ppb (9) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2019, 1 a.m. 45.3 ppb (42) 16.1 ppb (15) N/A 29.0 ppb (27) N/A N/A N/A 0.78 ppb (9) N/A 8.0 μg/m3 (33) 42.0
 
Jan. 23, 2019, midnight 31.9 ppb (30) 10.4 ppb (10) N/A 22.0 ppb (20) N/A N/A N/A 0.62 ppb (7) N/A 5.0 μg/m3 (21) 30.0
 
Jan. 22, 2019, 11 p.m. 24.0 ppb (22) 7.7 ppb (7) N/A 16.0 ppb (15) N/A N/A N/A 0.53 ppb (6) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 22, 2019, 10 p.m. 21.4 ppb (20) 7.3 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.49 ppb (5) N/A 0.0 μg/m3 (0) 20.0
 
Jan. 22, 2019, 9 p.m. 24.0 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.48 ppb (5) N/A 1.0 μg/m3 (4) 22.0
 
Jan. 22, 2019, 8 p.m. 19.6 ppb (18) 7.3 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.43 ppb (5) N/A 0.0 μg/m3 (0) 18.0
 
Jan. 22, 2019, 7 p.m. 21.1 ppb (20) 7.8 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.45 ppb (5) N/A N/A 20.0
 
Jan. 22, 2019, 6 p.m. 30.2 ppb (28) 12.0 ppb (11) N/A 18.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 5 p.m. 50.2 ppb (46) 22.5 ppb (21) N/A 28.0 ppb (26) N/A N/A N/A 0.65 ppb (7) N/A 7.0 μg/m3 (29) 46.0
 
Jan. 22, 2019, 4 p.m. 35.4 ppb (33) 13.6 ppb (13) N/A 22.0 ppb (20) N/A N/A N/A 0.58 ppb (6) N/A 4.0 μg/m3 (17) 33.0
 
Jan. 22, 2019, 3 p.m. 38.5 ppb (36) 13.0 ppb (12) N/A 26.0 ppb (24) N/A N/A N/A 0.64 ppb (7) N/A 6.0 μg/m3 (25) 36.0
 
Jan. 22, 2019, 2 p.m. 48.3 ppb (45) 19.9 ppb (18) N/A 29.0 ppb (27) N/A N/A N/A 0.72 ppb (8) N/A 8.0 μg/m3 (33) 45.0
 
Jan. 22, 2019, 1 p.m. 33.1 ppb (31) 11.8 ppb (11) N/A 21.0 ppb (19) N/A N/A N/A 0.61 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 22, 2019, noon 34.3 ppb (32) 13.0 ppb (12) N/A 21.0 ppb (19) N/A N/A N/A 0.63 ppb (7) N/A 5.0 μg/m3 (21) 32.0
 
Jan. 22, 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
 
Jan. 22, 2019, 10 a.m. 18.0 ppb (17) 3.4 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.51 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2019, 9 a.m. 35.3 ppb (33) 12.9 ppb (12) N/A 22.0 ppb (20) N/A N/A N/A 0.78 ppb (9) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 22, 2019, 8 a.m. 42.3 ppb (39) 20.9 ppb (19) N/A 21.0 ppb (19) N/A N/A N/A 0.9 ppb (10) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 22, 2019, 7 a.m. 34.8 ppb (32) 10.4 ppb (10) N/A 24.0 ppb (22) N/A N/A N/A 0.74 ppb (8) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 22, 2019, 6 a.m. 35.1 ppb (32) 9.9 ppb (9) N/A 25.0 ppb (23) N/A N/A N/A 0.8 ppb (9) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 22, 2019, 5 a.m. 21.1 ppb (20) 1.2 ppb (1) N/A 20.0 ppb (19) N/A N/A N/A 0.61 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 4 a.m. 21.0 ppb (19) 3.6 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.65 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 22, 2019, 3 a.m. 24.1 ppb (22) 5.0 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A 0.68 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 2 a.m. 21.4 ppb (20) 2.9 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A 0.6 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 22, 2019, 1 a.m. 23.4 ppb (22) 4.2 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.62 ppb (7) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 22, 2019, midnight 22.1 ppb (20) 5.8 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 1.0 μg/m3 (4) 20.0
 
Jan. 21, 2019, 11 p.m. 26.6 ppb (25) 8.9 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A 0.64 ppb (7) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 21, 2019, 10 p.m. 17.1 ppb (16) 4.8 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.52 ppb (6) N/A 1.0 μg/m3 (4) 16.0
 
Jan. 21, 2019, 9 p.m. 17.7 ppb (16) 5.5 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.5 ppb (6) N/A 2.0 μg/m3 (8) 16.0
 
Jan. 21, 2019, 8 p.m. 16.8 ppb (16) 5.2 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.49 ppb (5) N/A 3.0 μg/m3 (12) 16.0
 
Jan. 21, 2019, 7 p.m. 24.2 ppb (22) 10.0 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.48 ppb (5) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 21, 2019, 6 p.m. 26.4 ppb (24) 9.7 ppb (9) N/A 17.0 ppb (16) N/A N/A N/A 0.56 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, 5 p.m. 32.6 ppb (30) 11.6 ppb (11) N/A 21.0 ppb (19) N/A N/A N/A 0.83 ppb (9) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, 4 p.m. 78.3 ppb (76) 49.1 ppb (45) N/A 29.0 ppb (27) N/A N/A N/A 1.1 ppb (12) N/A 12.0 μg/m3 (50) 76.0
 
Jan. 21, 2019, 3 p.m. 72.8 ppb (70) 45.3 ppb (42) N/A 28.0 ppb (26) N/A N/A N/A 1.28 ppb (14) N/A 6.0 μg/m3 (25) 70.0
 
Jan. 21, 2019, 2 p.m. 52.5 ppb (49) 26.1 ppb (24) N/A 27.0 ppb (25) N/A N/A N/A 0.98 ppb (11) N/A 7.0 μg/m3 (29) 49.0
 
Jan. 21, 2019, 1 p.m. 38.3 ppb (35) 9.7 ppb (9) N/A 29.0 ppb (27) N/A N/A N/A 0.67 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2019, noon 25.2 ppb (23) 5.6 ppb (5) N/A 20.0 ppb (19) N/A N/A N/A 0.53 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 21, 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
 
Jan. 21, 2019, 10 a.m. 8.5 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 9 a.m. 9.0 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, 8 a.m. 10.8 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.49 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, 7 a.m. 16.3 ppb (15) 1.5 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, 6 a.m. 13.0 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.52 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, 5 a.m. 11.3 ppb (10) 1.3 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 4 a.m. 6.4 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.45 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 3 a.m. 7.8 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 2 a.m. 12.1 ppb (11) 2.7 ppb (3) 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
 
Jan. 21, 2019, 1 a.m. 15.8 ppb (15) 3.9 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.57 ppb (6) N/A 2.0 μg/m3 (8) 15.0
 
Jan. 21, 2019, midnight 15.6 ppb (14) 3.3 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.62 ppb (7) N/A 2.0 μg/m3 (8) 14.0
 
Jan. 20, 2019, 11 p.m. 9.1 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.53 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 10 p.m. 10.7 ppb (10) 4.1 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.55 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 20, 2019, 9 p.m. 11.4 ppb (11) 5.1 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.56 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, 8 p.m. 10.7 ppb (10) 5.1 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.55 ppb (6) N/A 0.0 μg/m3 (0) 10.0
 
Jan. 20, 2019, 7 p.m. 9.1 ppb (8) 4.1 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.56 ppb (6) N/A 0.0 μg/m3 (0) 8.0
 
Jan. 20, 2019, 6 p.m. 16.4 ppb (15) 8.4 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.64 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 5 p.m. 15.8 ppb (15) 7.9 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.64 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 4 p.m. 20.0 ppb (19) 9.8 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.66 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 3 p.m. 13.7 ppb (13) 4.7 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.56 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 20, 2019, 2 p.m. 8.1 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 1 p.m. 11.3 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.55 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, noon 7.6 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 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
 
Jan. 20, 2019, 10 a.m. 16.4 ppb (15) 2.4 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.7 ppb (8) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 9 a.m. 27.8 ppb (26) 10.3 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A 0.91 ppb (10) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 8 a.m. 29.8 ppb (28) 11.1 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.98 ppb (11) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, 7 a.m. 32.4 ppb (30) 13.4 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.98 ppb (11) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2019, 6 a.m. 28.0 ppb (26) 8.4 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.9 ppb (10) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 20, 2019, 5 a.m. 26.8 ppb (25) 6.4 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.85 ppb (9) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 20, 2019, 4 a.m. 29.2 ppb (27) 6.0 ppb (6) N/A 23.0 ppb (21) N/A N/A N/A 0.9 ppb (10) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 20, 2019, 3 a.m. 29.5 ppb (27) 2.4 ppb (2) N/A 27.0 ppb (25) N/A N/A N/A 0.88 ppb (10) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 2 a.m. 20.9 ppb (19) 1.2 ppb (1) N/A 20.0 ppb (19) N/A N/A N/A 0.72 ppb (8) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 1 a.m. 20.9 ppb (19) 3.1 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.72 ppb (8) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, midnight 28.2 ppb (26) 8.7 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.82 ppb (9) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 11 p.m. 26.8 ppb (25) 9.1 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A 0.79 ppb (9) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 10 p.m. 25.8 ppb (24) 8.2 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A 0.76 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 9 p.m. 16.0 ppb (15) 5.2 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.61 ppb (7) N/A 2.0 μg/m3 (8) 15.0
 
Jan. 19, 2019, 8 p.m. 14.8 ppb (14) 4.4 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.62 ppb (7) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 19, 2019, 7 p.m. 20.0 ppb (19) 7.5 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.63 ppb (7) N/A 3.0 μg/m3 (12) 19.0
 
Jan. 19, 2019, 6 p.m. 26.2 ppb (24) 12.4 ppb (11) N/A 14.0 ppb (13) N/A N/A N/A 0.7 ppb (8) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 5 p.m. 39.5 ppb (37) 21.8 ppb (20) N/A 18.0 ppb (17) N/A N/A N/A 0.86 ppb (10) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 4 p.m. 56.3 ppb (52) 38.4 ppb (36) N/A 18.0 ppb (17) N/A N/A N/A 1.18 ppb (13) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 3 p.m. 65.7 ppb (62) 45.8 ppb (42) N/A 20.0 ppb (19) N/A N/A N/A 1.13 ppb (13) N/A 7.0 μg/m3 (29) 62.0
 
Jan. 19, 2019, 2 p.m. 50.6 ppb (47) 32.5 ppb (30) N/A 18.0 ppb (17) N/A N/A N/A 1.03 ppb (11) N/A 11.0 μg/m3 (46) 47.0
 
Jan. 19, 2019, 1 p.m. 24.2 ppb (22) 8.4 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, noon 9.9 ppb (9) 1.4 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.49 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 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
 
Jan. 19, 2019, 10 a.m. 13.9 ppb (13) 1.2 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A 0.64 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 9 a.m. 16.2 ppb (15) 3.3 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.58 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 8 a.m. 12.6 ppb (12) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.59 ppb (7) N/A 2.0 μg/m3 (8) 12.0
 
Jan. 19, 2019, 7 a.m. 18.8 ppb (17) 4.7 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.72 ppb (8) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 19, 2019, 6 a.m. 29.0 ppb (27) 8.5 ppb (8) N/A 21.0 ppb (19) N/A N/A N/A 0.78 ppb (9) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 5 a.m. 27.6 ppb (26) 7.7 ppb (7) N/A 20.0 ppb (19) N/A N/A N/A 0.81 ppb (9) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 4 a.m. 43.5 ppb (40) 18.1 ppb (17) N/A 25.0 ppb (23) N/A N/A N/A 1.01 ppb (11) N/A 9.0 μg/m3 (38) 40.0
 
Jan. 19, 2019, 3 a.m. 29.0 ppb (27) 7.0 ppb (6) N/A 22.0 ppb (20) N/A N/A N/A 0.81 ppb (9) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 2 a.m. 36.4 ppb (34) 8.0 ppb (7) N/A 28.0 ppb (26) N/A N/A N/A 0.95 ppb (11) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 1 a.m. 37.8 ppb (35) 12.3 ppb (11) N/A 26.0 ppb (24) N/A N/A N/A 0.79 ppb (9) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 19, 2019, midnight 29.8 ppb (28) 9.9 ppb (9) N/A 20.0 ppb (19) N/A N/A N/A 0.73 ppb (8) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 18, 2019, 11 p.m. 25.6 ppb (24) 8.8 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.64 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 10 p.m. 21.8 ppb (20) 7.0 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.6 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 9 p.m. 9.6 ppb (9) 2.4 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 8 p.m. 10.1 ppb (9) 2.6 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 7 p.m. 23.8 ppb (22) 8.6 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.58 ppb (6) N/A N/A 22.0
 
Jan. 18, 2019, 6 p.m. 36.5 ppb (34) 15.7 ppb (15) N/A 21.0 ppb (19) N/A N/A N/A 0.71 ppb (8) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 5 p.m. 46.9 ppb (43) 25.4 ppb (24) N/A 22.0 ppb (20) N/A N/A N/A 0.93 ppb (10) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 4 p.m. 64.8 ppb (61) 43.5 ppb (40) N/A 21.0 ppb (19) N/A N/A N/A 1.12 ppb (12) N/A 16.0 μg/m3 (59) 61.0
 
Jan. 18, 2019, 3 p.m. 83.2 ppb (81) 60.7 ppb (57) N/A 23.0 ppb (21) N/A N/A N/A 1.24 ppb (14) N/A 11.0 μg/m3 (46) 81.0
 
Jan. 18, 2019, 2 p.m. 62.7 ppb (59) 40.5 ppb (38) N/A 22.0 ppb (20) N/A N/A N/A 0.99 ppb (11) N/A 12.0 μg/m3 (50) 59.0
 
Jan. 18, 2019, 1 p.m. 49.1 ppb (45) 30.6 ppb (28) N/A 19.0 ppb (18) N/A N/A N/A 0.94 ppb (10) N/A 10.0 μg/m3 (42) 45.0
 
Jan. 18, 2019, noon 49.7 ppb (46) 30.7 ppb (28) N/A 19.0 ppb (18) N/A N/A N/A 0.97 ppb (11) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2019, 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
 
Jan. 18, 2019, 10 a.m. 44.8 ppb (41) 23.4 ppb (22) N/A 22.0 ppb (20) N/A N/A N/A 0.9 ppb (10) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 9 a.m. 40.6 ppb (38) 19.1 ppb (18) N/A 22.0 ppb (20) N/A N/A N/A 0.94 ppb (10) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 8 a.m. 37.6 ppb (35) 14.8 ppb (14) N/A 23.0 ppb (21) N/A N/A N/A 0.94 ppb (10) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 7 a.m. 35.1 ppb (32) 9.7 ppb (9) N/A 25.0 ppb (23) N/A N/A N/A 0.9 ppb (10) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 6 a.m. 29.8 ppb (28) 7.7 ppb (7) N/A 22.0 ppb (20) N/A N/A N/A 0.76 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 5 a.m. 20.7 ppb (19) 1.3 ppb (1) N/A 19.0 ppb (18) N/A N/A N/A 0.67 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 4 a.m. 27.9 ppb (26) 3.4 ppb (3) N/A 25.0 ppb (23) N/A N/A N/A 0.79 ppb (9) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 3 a.m. 29.9 ppb (28) 7.8 ppb (7) N/A 22.0 ppb (20) N/A N/A N/A 0.74 ppb (8) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 2 a.m. 23.6 ppb (22) 4.6 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.67 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 1 a.m. 21.8 ppb (20) 2.7 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A 0.68 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, midnight 29.5 ppb (27) 8.8 ppb (8) N/A 21.0 ppb (19) N/A N/A N/A 0.7 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 11 p.m. 26.2 ppb (24) 8.7 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.64 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 10 p.m. 24.9 ppb (23) 8.8 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A 0.65 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 9 p.m. 24.0 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.59 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 8 p.m. 21.9 ppb (20) 8.0 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.55 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 7 p.m. 9.6 ppb (9) 1.8 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 6 p.m. 10.8 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.51 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 17, 2019, 5 p.m. 35.5 ppb (33) 8.6 ppb (8) N/A 27.0 ppb (25) N/A N/A N/A 0.74 ppb (8) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 17, 2019, 4 p.m. 30.0 ppb (28) 7.0 ppb (6) N/A 23.0 ppb (21) N/A N/A N/A 0.67 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 17, 2019, 3 p.m. 33.8 ppb (31) 10.7 ppb (10) N/A 23.0 ppb (21) N/A N/A N/A 0.65 ppb (7) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 17, 2019, 2 p.m. 22.5 ppb (21) 4.8 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A 0.62 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 1 p.m. 29.2 ppb (27) 5.9 ppb (5) N/A 23.0 ppb (21) N/A N/A N/A 0.63 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, noon 11.8 ppb (11) 1.9 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 17, 2019, 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 (52) 52.0
 
Jan. 17, 2019, 10 a.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 9 a.m. 4.7 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 8 a.m. 12.0 ppb (11) 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 7 a.m. 4.4 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 6 a.m. 5.5 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.45 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 17, 2019, 5 a.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.43 ppb (5) N/A -1.0 μg/m3 (0) 5.0
 
Jan. 17, 2019, 4 a.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.45 ppb (5) N/A 0.0 μg/m3 (0) 5.0
 
Jan. 17, 2019, 3 a.m. 4.4 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.43 ppb (5) N/A 0.0 μg/m3 (0) 5.0
 
Jan. 17, 2019, 2 a.m. 1.8 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.41 ppb (5) N/A -2.0 μg/m3 (0) 5.0
 
Jan. 17, 2019, 1 a.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.43 ppb (5) N/A 1.0 μg/m3 (4) 5.0
 
Jan. 17, 2019, midnight 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 11 p.m. 4.7 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2019, 10 p.m. 13.8 ppb (13) 3.2 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 9 p.m. 11.3 ppb (10) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.48 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 8 p.m. 7.9 ppb (7) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 7 p.m. 11.7 ppb (11) 3.7 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.45 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2019, 6 p.m. 13.8 ppb (13) 4.1 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.48 ppb (5) N/A 3.0 μg/m3 (12) 13.0
 
Jan. 16, 2019, 5 p.m. 11.8 ppb (11) 2.9 ppb (3) 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
 
Jan. 16, 2019, 4 p.m. 11.1 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.48 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 3 p.m. 14.1 ppb (13) 3.3 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.51 ppb (6) N/A 3.0 μg/m3 (12) 13.0
 
Jan. 16, 2019, 2 p.m. 17.6 ppb (16) 4.1 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.51 ppb (6) N/A 3.0 μg/m3 (12) 16.0
 
Jan. 16, 2019, 1 p.m. 15.3 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.48 ppb (5) N/A 2.0 μg/m3 (8) 14.0
 
Jan. 16, 2019, noon 6.3 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 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
Jan. 16, 2019, 10 a.m. 1.2 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
 
Jan. 16, 2019, 9 a.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2019, 8 a.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.38 ppb (4) N/A 0.0 μg/m3 (0) 4.0
 
Jan. 16, 2019, 7 a.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.4 ppb (4) N/A 3.0 μg/m3 (12) 12.0