AQSQID: 530330030

Site Name: Seattle-10th & Weller

Location: Seattle (Little Saigon), WA

Reporting: True, Located: True

Current AQI: 33.0

Seattle (Little Saigon) WA, US: 47.597222, -122.319722

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 9, 2020, 1 a.m. 22.2 ppb (21) 6.9 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
April 9, 2020, midnight 27.5 ppb (25) 12.1 ppb (11) N/A 15.0 ppb (14) N/A N/A N/A 0.52 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
April 8, 2020, 11 p.m. 21.5 ppb (20) 9.4 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
April 8, 2020, 10 p.m. 23.8 ppb (22) 11.2 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 9 p.m. 26.4 ppb (24) 12.7 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 8 p.m. 28.7 ppb (27) 14.1 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 27.0
 
April 8, 2020, 7 p.m. 35.7 ppb (33) 18.4 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (29) 33.0
 
April 8, 2020, 6 p.m. 32.6 ppb (30) 17.7 ppb (16) N/A 15.0 ppb (14) N/A N/A N/A 0.36 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
April 8, 2020, 5 p.m. 9.8 ppb (9) 3.3 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 8, 2020, 4 p.m. 14.4 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 3 p.m. 15.9 ppb (15) 5.2 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 2 p.m. 17.2 ppb (16) 3.1 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 1 p.m. 12.8 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 8, 2020, noon 14.8 ppb (14) 0.9 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
April 8, 2020, 11 a.m. 13.5 ppb (12) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
April 8, 2020, 10 a.m. 16.6 ppb (15) 0.9 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
April 8, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
April 8, 2020, 8 a.m. 17.9 ppb (17) 0.8 ppb (1) N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
April 8, 2020, 7 a.m. 13.6 ppb (13) 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2020, 6 a.m. 16.7 ppb (15) 0.3 ppb (0) N/A 16.0 ppb (15) N/A N/A N/A 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
April 8, 2020, 5 a.m. 21.5 ppb (20) 1.8 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
April 8, 2020, 4 a.m. 12.7 ppb (12) 1.1 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2020, 3 a.m. 9.1 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
April 8, 2020, 2 a.m. 22.0 ppb (20) 6.8 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 8, 2020, 1 a.m. 37.3 ppb (35) 15.6 ppb (14) N/A 22.0 ppb (20) N/A N/A N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2020, midnight 32.5 ppb (30) 13.9 ppb (13) N/A 19.0 ppb (18) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 30.0
 
April 7, 2020, 11 p.m. 32.4 ppb (30) 17.5 ppb (16) N/A 15.0 ppb (14) N/A N/A N/A 0.41 ppb (5) N/A 5.0 μg/m3 (21) 30.0
 
April 7, 2020, 10 p.m. 29.7 ppb (28) 14.0 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.46 ppb (5) N/A 5.0 μg/m3 (21) 28.0
 
April 7, 2020, 9 p.m. 34.9 ppb (32) 17.6 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 32.0
 
April 7, 2020, 8 p.m. 29.3 ppb (27) 16.7 ppb (15) N/A 13.0 ppb (12) N/A N/A N/A 0.4 ppb (4) N/A 5.0 μg/m3 (21) 27.0
 
April 7, 2020, 7 p.m. 33.4 ppb (31) 17.9 ppb (17) N/A 15.0 ppb (14) N/A N/A N/A 0.37 ppb (4) N/A 6.0 μg/m3 (25) 31.0
 
April 7, 2020, 6 p.m. 23.0 ppb (21) 11.7 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
April 7, 2020, 5 p.m. 18.4 ppb (17) 8.6 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 4 p.m. 15.3 ppb (14) 6.9 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 3 p.m. 14.2 ppb (13) 4.8 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 2 p.m. 10.2 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2020, 1 p.m. 13.8 ppb (13) 2.8 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, noon 10.6 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 11 a.m. 6.2 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
April 7, 2020, 10 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
 
April 7, 2020, 9 a.m. 4.3 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 8 a.m. 10.4 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 7 a.m. 16.5 ppb (15) 0.6 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 6 a.m. 14.6 ppb (14) 0.7 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 7, 2020, 5 a.m. 8.9 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2020, 4 a.m. 8.6 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 3 a.m. 10.9 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 2 a.m. 16.5 ppb (15) 3.6 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2020, 1 a.m. 19.7 ppb (18) 6.7 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 18.0
 
April 7, 2020, midnight 39.1 ppb (36) 17.6 ppb (16) N/A 22.0 ppb (20) N/A N/A N/A 0.44 ppb (5) N/A 4.0 μg/m3 (17) 36.0
 
April 6, 2020, 11 p.m. 36.1 ppb (33) 19.3 ppb (18) N/A 17.0 ppb (16) N/A N/A N/A 0.39 ppb (4) N/A 2.0 μg/m3 (8) 33.0
 
April 6, 2020, 10 p.m. 43.0 ppb (40) 23.3 ppb (22) N/A 20.0 ppb (19) N/A N/A N/A 0.42 ppb (5) N/A 0.0 μg/m3 (0) 40.0
 
April 6, 2020, 9 p.m. 36.4 ppb (34) 19.7 ppb (18) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 3.0 μg/m3 (12) 34.0
 
April 6, 2020, 8 p.m. 40.9 ppb (38) 21.4 ppb (20) N/A 20.0 ppb (19) N/A N/A N/A 0.39 ppb (4) N/A 5.0 μg/m3 (21) 38.0
 
April 6, 2020, 7 p.m. 36.3 ppb (34) 22.2 ppb (21) N/A 14.0 ppb (13) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (12) 34.0
 
April 6, 2020, 6 p.m. 40.0 ppb (37) 23.6 ppb (22) N/A 16.0 ppb (15) N/A N/A N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 37.0
 
April 6, 2020, 5 p.m. 43.4 ppb (40) 25.6 ppb (24) N/A 18.0 ppb (17) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 40.0
 
April 6, 2020, 4 p.m. 31.3 ppb (29) 15.7 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.39 ppb (4) N/A 2.0 μg/m3 (8) 29.0
 
April 6, 2020, 3 p.m. 19.4 ppb (18) 6.5 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 2.0 μg/m3 (8) 18.0
 
April 6, 2020, 2 p.m. 40.7 ppb (38) 15.1 ppb (14) N/A 26.0 ppb (24) N/A N/A N/A 0.45 ppb (5) N/A 6.0 μg/m3 (25) 38.0
 
April 6, 2020, 1 p.m. 34.5 ppb (32) 8.7 ppb (8) N/A 26.0 ppb (24) N/A N/A N/A 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
April 6, 2020, noon 21.3 ppb (20) 2.8 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
April 6, 2020, 11 a.m. 22.2 ppb (21) 3.6 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 10 a.m. 20.8 ppb (19) 2.1 ppb (2) N/A 19.0 ppb (18) N/A N/A N/A 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 6, 2020, 9 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
 
April 6, 2020, 8 a.m. 7.3 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2020, 7 a.m. 5.6 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A 0.0 μg/m3 (0) 6.0
 
April 6, 2020, 6 a.m. 6.0 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2020, 5 a.m. 6.5 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 6, 2020, 4 a.m. 6.7 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 6, 2020, 3 a.m. 9.1 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 2 a.m. 10.6 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 1 a.m. 9.7 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 6, 2020, midnight 9.4 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 9.0
 
April 5, 2020, 11 p.m. 12.0 ppb (11) 4.4 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 11.0
 
April 5, 2020, 10 p.m. 13.1 ppb (12) 5.9 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 12.0
 
April 5, 2020, 9 p.m. 16.7 ppb (15) 7.8 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 15.0
 
April 5, 2020, 8 p.m. 20.8 ppb (19) 10.4 ppb (10) N/A 10.0 ppb (9) N/A N/A N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 19.0
 
April 5, 2020, 7 p.m. 17.9 ppb (17) 8.6 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 17.0
 
April 5, 2020, 6 p.m. 11.8 ppb (11) 6.2 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 2.0 μg/m3 (8) 11.0
 
April 5, 2020, 5 p.m. 7.9 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 4 p.m. 11.4 ppb (11) 4.1 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
April 5, 2020, 3 p.m. 8.0 ppb (7) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 2 p.m. 7.4 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 1 p.m. 6.4 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, noon 5.7 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 11 a.m. 5.6 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 10 a.m. 5.6 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2020, 9 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
 
April 5, 2020, 8 a.m. 5.9 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 7 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 6 a.m. 4.5 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 5 a.m. 5.8 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 4 a.m. 6.7 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 3 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 2 a.m. 8.1 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 1 a.m. 14.9 ppb (14) 4.9 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 14.0
 
April 5, 2020, midnight 9.7 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 0.0 μg/m3 (0) 9.0
 
April 4, 2020, 11 p.m. 12.6 ppb (12) 5.5 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 0.0 μg/m3 (0) 12.0
 
April 4, 2020, 10 p.m. 14.7 ppb (14) 6.9 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.34 ppb (4) N/A -1.0 μg/m3 (0) 14.0
 
April 4, 2020, 9 p.m. 11.5 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 0.0 μg/m3 (0) 11.0
 
April 4, 2020, 8 p.m. 21.7 ppb (20) 10.8 ppb (10) N/A 11.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (4) 20.0
 
April 4, 2020, 7 p.m. 25.9 ppb (24) 13.9 ppb (13) N/A 12.0 ppb (11) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 24.0
 
April 4, 2020, 6 p.m. 32.5 ppb (30) 18.7 ppb (17) N/A 14.0 ppb (13) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 30.0
 
April 4, 2020, 5 p.m. 8.4 ppb (8) 3.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 4 p.m. 12.9 ppb (12) 5.2 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 3 p.m. 14.2 ppb (13) 4.9 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 2 p.m. 21.0 ppb (19) 6.1 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.38 ppb (4) N/A 2.0 μg/m3 (8) 19.0
 
April 4, 2020, 1 p.m. 26.9 ppb (25) 5.9 ppb (5) N/A 21.0 ppb (19) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
April 4, 2020, noon 18.0 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A N/A 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2020, 11 a.m. 13.2 ppb (12) 0.3 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 10 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
 
April 4, 2020, 9 a.m. 13.7 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 13.0
 
April 4, 2020, 8 a.m. 8.6 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 8.0
 
April 4, 2020, 7 a.m. 6.9 ppb (6) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A -1.0 μg/m3 (0) 6.0
 
April 4, 2020, 6 a.m. 7.5 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A 0.0 μg/m3 (0) 7.0
 
April 4, 2020, 5 a.m. 3.7 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 4 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 3 a.m. 4.0 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A -1.0 μg/m3 (0) 4.0
 
April 4, 2020, 2 a.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 4, 2020, 1 a.m. 5.3 ppb (5) 0.9 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
 
April 4, 2020, midnight 8.0 ppb (7) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
April 3, 2020, 11 p.m. 30.3 ppb (28) 17.2 ppb (16) N/A 13.0 ppb (12) N/A N/A N/A 0.45 ppb (5) N/A 1.0 μg/m3 (4) 28.0
 
April 3, 2020, 10 p.m. 23.9 ppb (22) 12.1 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A 0.36 ppb (4) N/A 1.0 μg/m3 (4) 22.0
 
April 3, 2020, 9 p.m. 17.4 ppb (16) 9.0 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A 1.0 μg/m3 (4) 16.0
 
April 3, 2020, 8 p.m. 19.9 ppb (18) 10.8 ppb (10) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 18.0
 
April 3, 2020, 7 p.m. 19.2 ppb (18) 10.5 ppb (10) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
April 3, 2020, 6 p.m. 23.7 ppb (22) 12.4 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.3 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
April 3, 2020, 5 p.m. 22.2 ppb (21) 12.0 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A 0.31 ppb (3) N/A 1.0 μg/m3 (4) 21.0
 
April 3, 2020, 4 p.m. 27.0 ppb (25) 15.2 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 2.0 μg/m3 (8) 25.0
 
April 3, 2020, 3 p.m. 35.1 ppb (32) 18.3 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 3.0 μg/m3 (12) 32.0
 
April 3, 2020, 2 p.m. 44.7 ppb (41) 23.9 ppb (22) N/A 21.0 ppb (19) N/A N/A N/A 0.36 ppb (4) N/A 5.0 μg/m3 (21) 41.0
 
April 3, 2020, 1 p.m. 39.1 ppb (36) 17.3 ppb (16) N/A 22.0 ppb (20) N/A N/A N/A 0.38 ppb (4) N/A 4.0 μg/m3 (17) 36.0
 
April 3, 2020, noon 31.3 ppb (29) 13.1 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
April 3, 2020, 11 a.m. 19.0 ppb (18) 6.4 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
April 3, 2020, 10 a.m. 15.1 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2020, 9 a.m. 15.3 ppb (14) 3.5 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 14.0
 
April 3, 2020, 8 a.m. 15.3 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2020, 7 a.m. 13.2 ppb (12) 3.1 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2020, 6 a.m. 19.5 ppb (18) 5.4 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 18.0
 
April 3, 2020, 5 a.m. 17.2 ppb (16) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 16.0
 
April 3, 2020, 4 a.m. 27.3 ppb (25) 8.4 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
April 3, 2020, 3 a.m. 19.7 ppb (18) 8.1 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (8) 18.0
 
April 3, 2020, 2 a.m. 22.4 ppb (21) 9.0 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 21.0
 
April 3, 2020, 1 a.m. 23.2 ppb (21) 10.3 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2020, midnight 20.5 ppb (19) 10.3 ppb (10) N/A 10.0 ppb (9) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
April 2, 2020, 11 p.m. 17.8 ppb (16) 9.6 ppb (9) N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 16.0
 
April 2, 2020, 10 p.m. 22.1 ppb (20) 11.6 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2020, 9 p.m. 25.3 ppb (23) 14.1 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 0.0 μg/m3 (0) 23.0
 
April 2, 2020, 8 p.m. 20.4 ppb (19) 12.1 ppb (11) N/A 8.0 ppb (7) N/A N/A N/A 0.29 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
April 2, 2020, 7 p.m. 28.8 ppb (27) 16.2 ppb (15) N/A 13.0 ppb (12) N/A N/A N/A 0.36 ppb (4) N/A 2.0 μg/m3 (8) 27.0
 
April 2, 2020, 6 p.m. 31.5 ppb (29) 18.8 ppb (17) N/A 13.0 ppb (12) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (8) 29.0
 
April 2, 2020, 5 p.m. 38.4 ppb (36) 23.1 ppb (21) N/A 15.0 ppb (14) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 36.0
 
April 2, 2020, 4 p.m. 31.6 ppb (29) 16.2 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 29.0
 
April 2, 2020, 3 p.m. 22.2 ppb (21) 9.3 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2020, 2 p.m. 24.4 ppb (23) 9.5 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
April 2, 2020, 1 p.m. 11.7 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 2, 2020, noon 19.2 ppb (18) 4.6 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 2, 2020, 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 2, 2020, 10 a.m. 18.7 ppb (17) 2.2 ppb (2) N/A 16.0 ppb (15) N/A N/A N/A 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 2, 2020, 9 a.m. 18.4 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A N/A 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 2, 2020, 8 a.m. 29.9 ppb (28) 4.7 ppb (4) N/A 25.0 ppb (23) N/A N/A N/A 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 2, 2020, 7 a.m. 30.9 ppb (29) 5.0 ppb (5) N/A 26.0 ppb (24) N/A N/A N/A 0.4 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 2, 2020, 6 a.m. 26.4 ppb (24) 3.9 ppb (4) N/A 23.0 ppb (21) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 2, 2020, 5 a.m. 17.6 ppb (16) 0.7 ppb (1) N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 2, 2020, 4 a.m. 12.9 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 2, 2020, 3 a.m. 15.4 ppb (14) 2.9 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2020, 2 a.m. 8.8 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0