ID: 2379

AQSQID: 530330030

Site Name: Seattle-10th & Weller

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

Updated: April 10, 2021, 5:43 p.m.

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 10, 2021, 4 p.m. 34.8 ppb (33) 18.9 ppb (18) N/A 16.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 4.0 μg/m3 (17) 33.0
 
April 10, 2021, 3 p.m. 21.7 ppb (21) 9.7 ppb (10) N/A 12.0 ppb (12) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (9) 21.0
 
April 10, 2021, 2 p.m. 9.8 ppb (10) 2.3 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.19 ppb (3) N/A 2.0 μg/m3 (9) 10.0
 
April 10, 2021, 1 p.m. 9.4 ppb (9) 2.3 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.17 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
April 10, 2021, noon 11.3 ppb (11) 3.6 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
April 10, 2021, 11 a.m. 10.5 ppb (10) 3.6 ppb (4) N/A 7.0 ppb (7) N/A N/A N/A 0.16 ppb (3) N/A 2.0 μg/m3 (9) 10.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
April 10, 2021, 9 a.m. 11.8 ppb (12) 1.7 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.13 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
April 10, 2021, 8 a.m. 9.6 ppb (10) 2.4 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.12 ppb (2) N/A 1.0 μg/m3 (5) 10.0
 
April 10, 2021, 7 a.m. 8.5 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (3) N/A -1.0 μg/m3 (0) 9.0
 
April 10, 2021, 6 a.m. 11.5 ppb (11) 3.1 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.19 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
April 10, 2021, 5 a.m. 14.9 ppb (15) 3.7 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 4 a.m. 14.5 ppb (14) 4.0 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 14.0
 
April 10, 2021, 3 a.m. 15.6 ppb (15) 4.9 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 15.0
 
April 10, 2021, 2 a.m. 23.1 ppb (22) 8.9 ppb (9) N/A 14.0 ppb (14) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 22.0
 
April 10, 2021, 1 a.m. 22.0 ppb (21) 9.6 ppb (10) N/A 12.0 ppb (12) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (9) 21.0
 
April 10, 2021, midnight 29.8 ppb (29) 13.0 ppb (13) N/A 17.0 ppb (17) N/A N/A N/A 0.38 ppb (5) N/A 4.0 μg/m3 (17) 29.0
 
April 9, 2021, 11 p.m. 30.3 ppb (29) 14.3 ppb (14) N/A 16.0 ppb (16) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 29.0
 
April 9, 2021, 10 p.m. 26.1 ppb (25) 14.2 ppb (14) N/A 12.0 ppb (12) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 25.0
 
April 9, 2021, 9 p.m. 29.6 ppb (28) 15.7 ppb (15) N/A 14.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 28.0
 
April 9, 2021, 8 p.m. 31.5 ppb (30) 17.7 ppb (17) N/A 14.0 ppb (14) N/A N/A N/A 0.38 ppb (5) N/A 2.0 μg/m3 (9) 30.0
 
April 9, 2021, 7 p.m. 36.8 ppb (35) 20.4 ppb (20) N/A 16.0 ppb (16) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 35.0
 
April 9, 2021, 6 p.m. 32.9 ppb (32) 17.6 ppb (17) N/A 15.0 ppb (15) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 32.0
 
April 9, 2021, 5 p.m. 38.0 ppb (36) 18.9 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 36.0
 
April 9, 2021, 4 p.m. 50.9 ppb (49) 26.8 ppb (26) N/A 24.0 ppb (23) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 49.0
 
April 9, 2021, 3 p.m. 49.6 ppb (47) 25.6 ppb (25) N/A 24.0 ppb (23) N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 47.0
 
April 9, 2021, 2 p.m. 47.2 ppb (45) 20.3 ppb (20) N/A 27.0 ppb (26) N/A N/A N/A 0.44 ppb (5) N/A 4.0 μg/m3 (17) 45.0
 
April 9, 2021, 1 p.m. 28.3 ppb (27) 5.4 ppb (6) N/A 23.0 ppb (22) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 27.0
 
April 9, 2021, noon 25.8 ppb (25) 5.4 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 9, 2021, 11 a.m. 22.3 ppb (22) 3.3 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 9, 2021, 10 a.m. 13.4 ppb (13) 1.7 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 9, 2021, 9 a.m. 16.6 ppb (16) 2.1 ppb (2) N/A 15.0 ppb (15) N/A N/A N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 9, 2021, 8 a.m. 14.6 ppb (14) 2.2 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 7 a.m. 14.6 ppb (14) 2.3 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 6 a.m. 22.4 ppb (22) 5.1 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.28 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
April 9, 2021, 5 a.m. 33.3 ppb (32) 11.5 ppb (11) N/A 22.0 ppb (21) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 32.0
 
April 9, 2021, 4 a.m. 34.7 ppb (33) 11.5 ppb (11) N/A 23.0 ppb (22) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 33.0
 
April 9, 2021, 3 a.m. 31.8 ppb (30) 12.2 ppb (12) N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 30.0
 
April 9, 2021, 2 a.m. 29.7 ppb (29) 12.6 ppb (12) N/A 17.0 ppb (17) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 29.0
 
April 9, 2021, 1 a.m. 28.6 ppb (27) 12.6 ppb (12) N/A 16.0 ppb (16) N/A N/A N/A 0.4 ppb (5) N/A 3.0 μg/m3 (13) 27.0
 
April 9, 2021, midnight 31.0 ppb (30) 14.2 ppb (14) N/A 17.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 3.0 μg/m3 (13) 30.0
 
April 8, 2021, 11 p.m. 51.9 ppb (49) 26.6 ppb (26) N/A 25.0 ppb (24) N/A N/A N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 49.0
 
April 8, 2021, 10 p.m. 30.4 ppb (29) 14.0 ppb (14) N/A 17.0 ppb (17) N/A N/A N/A 0.42 ppb (5) N/A 0.0 μg/m3 (0) 29.0
 
April 8, 2021, 9 p.m. 22.3 ppb (22) 10.9 ppb (11) N/A 11.0 ppb (11) N/A N/A N/A 0.31 ppb (4) N/A 1.0 μg/m3 (5) 22.0
 
April 8, 2021, 8 p.m. 35.4 ppb (34) 18.1 ppb (18) N/A 17.0 ppb (17) N/A N/A N/A 0.38 ppb (5) N/A 2.0 μg/m3 (9) 34.0
 
April 8, 2021, 7 p.m. 38.0 ppb (36) 19.6 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 36.0
 
April 8, 2021, 6 p.m. 45.0 ppb (43) 24.6 ppb (24) N/A 20.0 ppb (19) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 43.0
 
April 8, 2021, 5 p.m. 48.4 ppb (46) 27.5 ppb (26) N/A 21.0 ppb (20) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 46.0
 
April 8, 2021, 4 p.m. 44.7 ppb (43) 25.3 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 43.0
 
April 8, 2021, 3 p.m. 50.4 ppb (48) 29.1 ppb (28) N/A 21.0 ppb (20) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 48.0
 
April 8, 2021, 2 p.m. 22.4 ppb (22) 6.3 ppb (6) N/A 16.0 ppb (16) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
April 8, 2021, 1 p.m. 20.7 ppb (20) 6.6 ppb (7) N/A 14.0 ppb (14) N/A N/A N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 8, 2021, noon 16.8 ppb (16) 4.9 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.26 ppb (4) N/A 1.0 μg/m3 (5) 16.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
April 8, 2021, 10 a.m. 6.3 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.14 ppb (2) N/A -1.0 μg/m3 (0) 6.0
 
April 8, 2021, 9 a.m. 4.4 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.12 ppb (2) N/A -1.0 μg/m3 (0) 5.0
 
April 8, 2021, 8 a.m. 15.2 ppb (15) 3.8 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.16 ppb (3) N/A 2.0 μg/m3 (9) 15.0
 
April 8, 2021, 7 a.m. 24.4 ppb (24) 5.4 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 24.0
 
April 8, 2021, 6 a.m. 25.0 ppb (24) 6.4 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.21 ppb (3) N/A 1.0 μg/m3 (5) 24.0
 
April 8, 2021, 5 a.m. 26.1 ppb (25) 6.2 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2021, 4 a.m. 25.7 ppb (25) 6.4 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
April 8, 2021, 3 a.m. 22.6 ppb (22) 7.7 ppb (8) N/A 15.0 ppb (15) N/A N/A N/A 0.28 ppb (4) N/A 3.0 μg/m3 (13) 22.0
 
April 8, 2021, 2 a.m. 30.0 ppb (29) 9.8 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 29.0
 
April 8, 2021, 1 a.m. 32.4 ppb (31) 11.5 ppb (11) N/A 21.0 ppb (20) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 31.0
 
April 8, 2021, midnight 36.7 ppb (35) 15.1 ppb (15) N/A 22.0 ppb (21) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 35.0
 
April 7, 2021, 11 p.m. 47.1 ppb (45) 21.3 ppb (21) N/A 26.0 ppb (25) N/A N/A N/A 0.4 ppb (5) N/A 3.0 μg/m3 (13) 45.0
 
April 7, 2021, 10 p.m. 45.2 ppb (43) 21.6 ppb (21) N/A 24.0 ppb (23) N/A N/A N/A 0.36 ppb (5) N/A 2.0 μg/m3 (9) 43.0
 
April 7, 2021, 9 p.m. 44.2 ppb (42) 19.5 ppb (19) N/A 25.0 ppb (24) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 42.0
 
April 7, 2021, 8 p.m. 37.2 ppb (36) 19.2 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 36.0
 
April 7, 2021, 7 p.m. 37.2 ppb (36) 18.9 ppb (18) N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (4) N/A 4.0 μg/m3 (17) 36.0
 
April 7, 2021, 6 p.m. 40.9 ppb (39) 18.5 ppb (18) N/A 22.0 ppb (21) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 39.0
 
April 7, 2021, 5 p.m. 42.2 ppb (40) 21.1 ppb (20) N/A 21.0 ppb (20) N/A N/A N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 40.0
 
April 7, 2021, 4 p.m. 47.4 ppb (45) 22.0 ppb (21) N/A 25.0 ppb (24) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 45.0
 
April 7, 2021, 3 p.m. 46.0 ppb (44) 18.9 ppb (18) N/A 27.0 ppb (26) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 44.0
 
April 7, 2021, 2 p.m. 29.3 ppb (28) 11.3 ppb (11) N/A 18.0 ppb (17) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
April 7, 2021, 1 p.m. 40.8 ppb (39) 18.8 ppb (18) N/A 22.0 ppb (21) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 39.0
 
April 7, 2021, noon 34.6 ppb (33) 16.2 ppb (16) N/A 18.0 ppb (17) N/A N/A N/A 0.39 ppb (5) N/A -2.0 μg/m3 (0) 33.0
 
April 7, 2021, 11 a.m. 24.0 ppb (23) 7.7 ppb (8) N/A 16.0 ppb (16) N/A N/A N/A 0.22 ppb (3) N/A -1.0 μg/m3 (0) 23.0
 
April 7, 2021, 10 a.m. 26.7 ppb (26) 7.6 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.18 ppb (3) N/A 0.0 μg/m3 (0) 26.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2021, 8 a.m. 31.6 ppb (30) 8.3 ppb (8) N/A 23.0 ppb (22) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 7, 2021, 7 a.m. 17.3 ppb (17) 3.5 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2021, 6 a.m. 13.9 ppb (14) 2.4 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2021, 5 a.m. 21.5 ppb (21) 5.4 ppb (6) N/A 16.0 ppb (16) N/A N/A N/A 0.3 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
April 7, 2021, 4 a.m. 22.7 ppb (22) 6.6 ppb (7) N/A 16.0 ppb (16) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2021, 3 a.m. 43.1 ppb (41) 17.6 ppb (17) N/A 26.0 ppb (25) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 7, 2021, 2 a.m. 86.7 ppb (86) 42.4 ppb (40) N/A 44.0 ppb (42) N/A N/A N/A 0.58 ppb (7) N/A 9.0 μg/m3 (38) 86.0
 
April 7, 2021, 1 a.m. 98.5 ppb (99) 55.7 ppb (53) N/A 43.0 ppb (41) N/A N/A N/A 0.77 ppb (10) N/A 11.0 μg/m3 (46) 99.0
 
April 7, 2021, midnight 77.3 ppb (76) 43.5 ppb (42) N/A 34.0 ppb (33) N/A N/A N/A 0.67 ppb (8) N/A 3.0 μg/m3 (13) 76.0
 
April 6, 2021, 11 p.m. 47.7 ppb (45) 25.4 ppb (24) N/A 22.0 ppb (21) N/A N/A N/A 0.52 ppb (6) N/A 5.0 μg/m3 (21) 45.0
 
April 6, 2021, 10 p.m. 49.6 ppb (47) 27.5 ppb (26) N/A 22.0 ppb (21) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (34) 47.0
 
April 6, 2021, 9 p.m. 52.6 ppb (50) 28.7 ppb (28) N/A 24.0 ppb (23) N/A N/A N/A 0.49 ppb (6) N/A 11.0 μg/m3 (46) 50.0
 
April 6, 2021, 8 p.m. 46.4 ppb (44) 29.0 ppb (28) N/A 17.0 ppb (17) N/A N/A N/A 0.39 ppb (5) N/A 9.0 μg/m3 (38) 44.0
 
April 6, 2021, 7 p.m. 64.0 ppb (62) 40.0 ppb (38) N/A 24.0 ppb (23) N/A N/A N/A 0.44 ppb (5) N/A 11.0 μg/m3 (46) 62.0
 
April 6, 2021, 6 p.m. 79.3 ppb (78) 49.7 ppb (47) N/A 30.0 ppb (29) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 78.0
 
April 6, 2021, 5 p.m. 100.0 ppb (100) 67.1 ppb (65) N/A 33.0 ppb (32) N/A N/A N/A 0.52 ppb (6) N/A 12.0 μg/m3 (50) 100.0
 
April 6, 2021, 4 p.m. 106.5 ppb (103) 72.7 ppb (71) N/A 34.0 ppb (33) N/A N/A N/A 0.57 ppb (7) N/A 13.0 μg/m3 (53) 103.0
 
April 6, 2021, 3 p.m. 48.8 ppb (47) 25.1 ppb (24) N/A 24.0 ppb (23) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 47.0
 
April 6, 2021, 2 p.m. 42.5 ppb (41) 17.3 ppb (17) N/A 25.0 ppb (24) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 41.0
 
April 6, 2021, 1 p.m. 37.8 ppb (36) 11.3 ppb (11) N/A 26.0 ppb (25) N/A N/A N/A 0.37 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 6, 2021, noon 36.2 ppb (35) 11.0 ppb (11) N/A 25.0 ppb (24) N/A N/A N/A 0.37 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 11 a.m. 32.9 ppb (32) 9.1 ppb (9) N/A 24.0 ppb (23) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 32.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
April 6, 2021, 9 a.m. 24.5 ppb (24) 3.0 ppb (3) N/A 22.0 ppb (21) N/A N/A N/A 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 8 a.m. 30.5 ppb (29) 4.5 ppb (5) N/A 26.0 ppb (25) N/A N/A N/A 0.26 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
April 6, 2021, 7 a.m. 29.9 ppb (29) 8.2 ppb (8) N/A 22.0 ppb (21) N/A N/A N/A 0.37 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2021, 6 a.m. 33.1 ppb (32) 11.6 ppb (11) N/A 22.0 ppb (21) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2021, 5 a.m. 51.9 ppb (49) 20.2 ppb (20) N/A 32.0 ppb (31) N/A N/A N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 49.0
 
April 6, 2021, 4 a.m. 85.7 ppb (85) 43.7 ppb (42) N/A 42.0 ppb (40) N/A N/A N/A 0.75 ppb (10) N/A 16.0 μg/m3 (60) 85.0
 
April 6, 2021, 3 a.m. 79.6 ppb (79) 37.2 ppb (36) N/A 42.0 ppb (40) N/A N/A N/A 0.55 ppb (7) N/A 9.0 μg/m3 (38) 79.0
 
April 6, 2021, 2 a.m. 85.2 ppb (85) 40.8 ppb (39) N/A 44.0 ppb (42) N/A N/A N/A 0.67 ppb (8) N/A 8.0 μg/m3 (34) 85.0
 
April 6, 2021, 1 a.m. 70.7 ppb (69) 32.3 ppb (31) N/A 38.0 ppb (36) N/A N/A N/A 0.6 ppb (7) N/A 7.0 μg/m3 (30) 69.0
 
April 6, 2021, midnight 36.9 ppb (35) 18.6 ppb (18) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 35.0
 
April 5, 2021, 11 p.m. 48.0 ppb (46) 26.1 ppb (25) N/A 22.0 ppb (21) N/A N/A N/A 0.57 ppb (7) N/A -1.0 μg/m3 (0) 46.0
 
April 5, 2021, 10 p.m. 46.9 ppb (45) 25.0 ppb (24) N/A 22.0 ppb (21) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (13) 45.0
 
April 5, 2021, 9 p.m. 35.4 ppb (34) 21.4 ppb (21) N/A 14.0 ppb (14) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 34.0
 
April 5, 2021, 8 p.m. 43.1 ppb (41) 26.7 ppb (26) N/A 16.0 ppb (16) N/A N/A N/A 0.4 ppb (5) N/A 2.0 μg/m3 (9) 41.0
 
April 5, 2021, 7 p.m. 52.5 ppb (50) 31.5 ppb (30) N/A 21.0 ppb (20) N/A N/A N/A 0.61 ppb (7) N/A 5.0 μg/m3 (21) 50.0
 
April 5, 2021, 6 p.m. 81.5 ppb (81) 55.5 ppb (53) N/A 26.0 ppb (25) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 81.0
 
April 5, 2021, 5 p.m. 95.3 ppb (95) 62.3 ppb (60) N/A 33.0 ppb (32) N/A N/A N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 95.0
 
April 5, 2021, 4 p.m. 107.7 ppb (103) 77.4 ppb (76) N/A 30.0 ppb (29) N/A N/A N/A 0.61 ppb (7) N/A 14.0 μg/m3 (55) 103.0
 
April 5, 2021, 3 p.m. 112.4 ppb (104) 77.7 ppb (77) N/A 35.0 ppb (34) N/A N/A N/A 0.68 ppb (8) N/A 11.0 μg/m3 (46) 104.0
 
April 5, 2021, 2 p.m. 105.8 ppb (102) 75.2 ppb (74) N/A 31.0 ppb (30) N/A N/A N/A 0.71 ppb (8) N/A 15.0 μg/m3 (58) 102.0
 
April 5, 2021, 1 p.m. 53.6 ppb (51) 26.1 ppb (25) N/A 28.0 ppb (27) N/A N/A N/A 0.48 ppb (6) N/A 10.0 μg/m3 (42) 51.0
 
April 5, 2021, noon 68.9 ppb (67) 39.9 ppb (38) N/A 29.0 ppb (28) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 67.0
 
April 5, 2021, 11 a.m. 75.1 ppb (74) 43.8 ppb (42) N/A 31.0 ppb (30) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 74.0
 
April 5, 2021, 10 a.m. 51.3 ppb (49) 19.4 ppb (19) N/A 32.0 ppb (31) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 49.0
 
April 5, 2021, 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 5, 2021, 8 a.m. 19.8 ppb (19) 2.8 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 19.0
 
April 5, 2021, 7 a.m. 17.9 ppb (17) 1.3 ppb (2) N/A 17.0 ppb (17) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (9) 17.0
 
April 5, 2021, 6 a.m. 15.6 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 15.0
 
April 5, 2021, 5 a.m. 11.6 ppb (11) 1.2 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2021, 4 a.m. 8.7 ppb (9) 0.7 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 1.0 μg/m3 (5) 9.0
 
April 5, 2021, 3 a.m. 10.7 ppb (11) 2.1 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 11.0
 
April 5, 2021, 2 a.m. 10.0 ppb (10) 1.9 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.29 ppb (4) N/A 2.0 μg/m3 (9) 10.0
 
April 5, 2021, 1 a.m. 23.5 ppb (23) 9.9 ppb (10) N/A 14.0 ppb (14) N/A N/A N/A 0.5 ppb (6) N/A 4.0 μg/m3 (17) 23.0
 
April 5, 2021, midnight 27.5 ppb (26) 11.1 ppb (11) N/A 16.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 4.0 μg/m3 (17) 26.0
 
April 4, 2021, 11 p.m. 8.2 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 8.0
 
April 4, 2021, 10 p.m. 14.3 ppb (14) 6.7 ppb (7) N/A 8.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A -1.0 μg/m3 (0) 14.0
 
April 4, 2021, 9 p.m. 16.0 ppb (16) 8.1 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A -3.0 μg/m3 (0) 16.0
 
April 4, 2021, 8 p.m. 10.2 ppb (10) 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (4) N/A 0.0 μg/m3 (0) 10.0
 
April 4, 2021, 7 p.m. 14.0 ppb (14) 6.2 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (9) 14.0
 
April 4, 2021, 6 p.m. 12.7 ppb (12) 5.6 ppb (6) N/A 7.0 ppb (7) N/A N/A N/A 0.3 ppb (4) N/A 2.0 μg/m3 (9) 12.0
 
April 4, 2021, 5 p.m. 13.8 ppb (14) 5.6 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.3 ppb (4) N/A 3.0 μg/m3 (13) 14.0
 
April 4, 2021, 4 p.m. 9.6 ppb (10) 3.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 10.0
 
April 4, 2021, 3 p.m. 7.2 ppb (7) 1.3 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (3) N/A -1.0 μg/m3 (0) 7.0
 
April 4, 2021, 2 p.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (9) 9.0
 
April 4, 2021, 1 p.m. 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.13 ppb (2) N/A 2.0 μg/m3 (9) 9.0
 
April 4, 2021, noon 3.7 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.12 ppb (2) N/A -1.0 μg/m3 (0) 4.0
 
April 4, 2021, 11 a.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.11 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
April 4, 2021, 10 a.m. 3.8 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.12 ppb (2) N/A 1.0 μg/m3 (5) 5.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
April 4, 2021, 8 a.m. 3.5 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.1 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
April 4, 2021, 7 a.m. 4.7 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.11 ppb (2) N/A 1.0 μg/m3 (5) 5.0
 
April 4, 2021, 6 a.m. 4.4 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.12 ppb (2) N/A 1.0 μg/m3 (5) 5.0
 
April 4, 2021, 5 a.m. 5.9 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.14 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
April 4, 2021, 4 a.m. 11.2 ppb (11) 0.7 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 3 a.m. 13.6 ppb (13) 1.2 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 2 a.m. 22.8 ppb (22) 8.2 ppb (8) N/A 15.0 ppb (15) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
April 4, 2021, 1 a.m. 31.0 ppb (30) 11.6 ppb (11) N/A 19.0 ppb (18) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 30.0
 
April 4, 2021, midnight 28.0 ppb (27) 11.2 ppb (11) N/A 17.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 27.0
 
April 3, 2021, 11 p.m. 22.9 ppb (22) 9.4 ppb (9) N/A 14.0 ppb (14) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
April 3, 2021, 10 p.m. 17.7 ppb (17) 8.0 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.27 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2021, 9 p.m. 26.2 ppb (25) 12.0 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.3 ppb (4) N/A 1.0 μg/m3 (5) 25.0
 
April 3, 2021, 8 p.m. 23.7 ppb (23) 11.0 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
April 3, 2021, 7 p.m. 17.7 ppb (17) 6.8 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.28 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2021, 6 p.m. 27.6 ppb (27) 13.5 ppb (13) N/A 14.0 ppb (14) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 27.0
 
April 3, 2021, 5 p.m. 35.6 ppb (34) 17.9 ppb (17) N/A 18.0 ppb (17) N/A N/A N/A 0.37 ppb (5) N/A 3.0 μg/m3 (13) 34.0