ID: 2379

AQSQID: 530330030

Site Name: Seattle-10th & Weller

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

Updated: Sept. 17, 2021, 1:57 a.m.

Location: Seattle (Little Saigon), WA

Reporting: True, Located: True

Current AQI: 42.0

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
Sept. 17, 2021, midnight 43.6 ppb (42) 22.2 ppb (21) N/A 21.0 ppb (20) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 42.0
 
Sept. 16, 2021, 11 p.m. 52.9 ppb (50) 29.8 ppb (29) N/A 23.0 ppb (22) N/A N/A N/A 0.47 ppb (6) N/A 5.0 μg/m3 (21) 50.0
 
Sept. 16, 2021, 10 p.m. 58.0 ppb (56) 36.8 ppb (35) N/A 21.0 ppb (20) N/A N/A N/A 0.49 ppb (6) N/A 6.0 μg/m3 (25) 56.0
 
Sept. 16, 2021, 9 p.m. 46.9 ppb (45) 30.9 ppb (30) N/A 16.0 ppb (16) N/A N/A N/A 0.45 ppb (6) N/A 7.0 μg/m3 (30) 45.0
 
Sept. 16, 2021, 8 p.m. 44.0 ppb (42) 28.5 ppb (27) N/A 16.0 ppb (16) N/A N/A N/A 0.52 ppb (6) N/A 7.0 μg/m3 (30) 42.0
 
Sept. 16, 2021, 7 p.m. 36.1 ppb (35) 24.0 ppb (23) N/A 12.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 35.0
 
Sept. 16, 2021, 6 p.m. 19.4 ppb (19) 10.9 ppb (11) N/A 9.0 ppb (9) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 5 p.m. 33.6 ppb (32) 21.3 ppb (21) N/A 12.0 ppb (12) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 32.0
 
Sept. 16, 2021, 4 p.m. 68.5 ppb (67) 49.4 ppb (47) N/A 19.0 ppb (18) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (30) 67.0
 
Sept. 16, 2021, 3 p.m. 119.5 ppb (105) 92.4 ppb (92) N/A 27.0 ppb (26) N/A N/A N/A 0.55 ppb (7) N/A 8.0 μg/m3 (34) 105.0
 
Sept. 16, 2021, 2 p.m. 118.1 ppb (105) 93.2 ppb (93) N/A 25.0 ppb (24) N/A N/A N/A 0.71 ppb (8) N/A 16.0 μg/m3 (60) 105.0
 
Sept. 16, 2021, 1 p.m. 19.3 ppb (19) 5.2 ppb (5) N/A 14.0 ppb (14) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 19.0
 
Sept. 16, 2021, noon 18.8 ppb (18) 5.5 ppb (6) N/A 13.0 ppb (13) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2021, 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
 
Sept. 16, 2021, 10 a.m. 10.9 ppb (11) 1.5 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2021, 9 a.m. 10.2 ppb (10) 1.5 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2021, 8 a.m. 7.0 ppb (7) 1.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 16, 2021, 7 a.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 16, 2021, 6 a.m. 3.9 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 16, 2021, 5 a.m. 4.5 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 16, 2021, 4 a.m. 5.6 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 3 a.m. 7.4 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.19 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 2 a.m. 11.7 ppb (12) 2.4 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 16, 2021, 1 a.m. 36.8 ppb (35) 16.6 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A 0.47 ppb (6) N/A 6.0 μg/m3 (25) 35.0
 
Sept. 16, 2021, midnight 65.6 ppb (64) 37.1 ppb (35) N/A 28.0 ppb (27) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 64.0
 
Sept. 15, 2021, 11 p.m. 57.1 ppb (55) 33.8 ppb (32) N/A 23.0 ppb (22) N/A N/A N/A 0.46 ppb (6) N/A 9.0 μg/m3 (38) 55.0
 
Sept. 15, 2021, 10 p.m. 53.0 ppb (50) 30.6 ppb (29) N/A 23.0 ppb (22) N/A N/A N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 50.0
 
Sept. 15, 2021, 9 p.m. 53.1 ppb (51) 34.0 ppb (33) N/A 19.0 ppb (18) N/A N/A N/A 0.46 ppb (6) N/A 7.0 μg/m3 (30) 51.0
 
Sept. 15, 2021, 8 p.m. 47.9 ppb (46) 29.4 ppb (28) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 46.0
 
Sept. 15, 2021, 7 p.m. 53.1 ppb (51) 35.2 ppb (34) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 4.0 μg/m3 (17) 51.0
 
Sept. 15, 2021, 6 p.m. 15.1 ppb (15) 7.2 ppb (7) N/A 8.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (13) 15.0
 
Sept. 15, 2021, 5 p.m. 13.0 ppb (13) 5.2 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 15, 2021, 4 p.m. 14.4 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 3 p.m. 10.5 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2021, 2 p.m. 8.7 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 1 p.m. 6.3 ppb (6) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2021, noon 4.8 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.14 ppb (2) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 15, 2021, 11 a.m. 6.9 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.13 ppb (2) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 15, 2021, 10 a.m. 10.7 ppb (11) 2.7 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.22 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 15, 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
 
Sept. 15, 2021, 8 a.m. 29.8 ppb (29) 11.5 ppb (11) N/A 18.0 ppb (17) N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 29.0
 
Sept. 15, 2021, 7 a.m. 20.5 ppb (20) 7.7 ppb (8) N/A 13.0 ppb (13) N/A N/A N/A 0.27 ppb (4) N/A 3.0 μg/m3 (13) 20.0
 
Sept. 15, 2021, 6 a.m. 23.9 ppb (23) 10.4 ppb (10) N/A 13.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 23.0
 
Sept. 15, 2021, 5 a.m. 42.6 ppb (41) 21.2 ppb (20) N/A 21.0 ppb (20) N/A N/A N/A 0.47 ppb (6) N/A 6.0 μg/m3 (25) 41.0
 
Sept. 15, 2021, 4 a.m. 44.7 ppb (43) 21.7 ppb (21) N/A 23.0 ppb (22) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (30) 43.0
 
Sept. 15, 2021, 3 a.m. 46.9 ppb (45) 23.4 ppb (23) N/A 23.0 ppb (22) N/A N/A N/A 0.44 ppb (5) N/A 7.0 μg/m3 (30) 45.0
 
Sept. 15, 2021, 2 a.m. 33.6 ppb (32) 16.4 ppb (16) N/A 17.0 ppb (17) N/A N/A N/A 0.36 ppb (5) N/A 2.0 μg/m3 (9) 32.0
 
Sept. 15, 2021, 1 a.m. 32.0 ppb (31) 15.2 ppb (15) N/A 17.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 5.0 μg/m3 (21) 31.0
 
Sept. 15, 2021, midnight 36.2 ppb (35) 14.9 ppb (15) N/A 21.0 ppb (20) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 35.0
 
Sept. 14, 2021, 11 p.m. 35.6 ppb (34) 14.4 ppb (14) N/A 21.0 ppb (20) N/A N/A N/A 0.48 ppb (6) N/A 6.0 μg/m3 (25) 34.0
 
Sept. 14, 2021, 10 p.m. 28.0 ppb (27) 13.9 ppb (14) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, 9 p.m. 39.8 ppb (38) 18.5 ppb (18) N/A 21.0 ppb (20) N/A N/A N/A 0.46 ppb (6) N/A 8.0 μg/m3 (34) 38.0
 
Sept. 14, 2021, 8 p.m. 55.7 ppb (53) 31.8 ppb (30) N/A 24.0 ppb (23) N/A N/A N/A 0.54 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 14, 2021, 7 p.m. 87.6 ppb (87) 59.9 ppb (58) N/A 28.0 ppb (27) N/A N/A N/A 0.65 ppb (8) N/A 10.0 μg/m3 (42) 87.0
 
Sept. 14, 2021, 6 p.m. 73.3 ppb (72) 46.5 ppb (44) N/A 27.0 ppb (26) N/A N/A N/A 0.55 ppb (7) N/A N/A 72.0
 
Sept. 14, 2021, 5 p.m. 83.2 ppb (83) 59.9 ppb (58) N/A 23.0 ppb (22) N/A N/A N/A 0.54 ppb (6) N/A 10.0 μg/m3 (42) 83.0
 
Sept. 14, 2021, 4 p.m. 75.3 ppb (74) 53.8 ppb (51) N/A 21.0 ppb (20) N/A N/A N/A 0.55 ppb (7) N/A 10.0 μg/m3 (42) 74.0
 
Sept. 14, 2021, 3 p.m. 56.0 ppb (54) 37.6 ppb (36) N/A 18.0 ppb (17) N/A N/A N/A 0.41 ppb (5) N/A 9.0 μg/m3 (38) 54.0
 
Sept. 14, 2021, 2 p.m. 38.1 ppb (36) 21.9 ppb (21) N/A 16.0 ppb (16) N/A N/A N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, 1 p.m. 86.4 ppb (86) 63.1 ppb (61) N/A 23.0 ppb (22) N/A N/A N/A 0.68 ppb (8) N/A 12.0 μg/m3 (50) 86.0
 
Sept. 14, 2021, noon 27.9 ppb (27) 9.3 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.3 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 14, 2021, 11 a.m. 24.1 ppb (23) 7.2 ppb (7) N/A 17.0 ppb (17) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, 10 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
 
Sept. 14, 2021, 9 a.m. 16.8 ppb (16) 2.6 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A 28.0 μg/m3 (85) 85.0
 
Sept. 14, 2021, 8 a.m. 11.8 ppb (12) 0.7 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2021, 7 a.m. 18.4 ppb (18) 3.7 ppb (4) N/A 15.0 ppb (15) N/A N/A N/A 0.37 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 14, 2021, 6 a.m. 13.5 ppb (13) 1.1 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 5 a.m. 14.1 ppb (14) 1.8 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2021, 4 a.m. 14.9 ppb (15) 2.1 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A 0.28 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2021, 3 a.m. 12.8 ppb (13) 1.7 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A 0.27 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 14, 2021, 2 a.m. 12.6 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.3 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2021, 1 a.m. 25.4 ppb (24) 11.6 ppb (11) N/A 14.0 ppb (14) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 24.0
 
Sept. 14, 2021, midnight 24.0 ppb (23) 12.8 ppb (13) N/A 11.0 ppb (11) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 23.0
 
Sept. 13, 2021, 11 p.m. 48.6 ppb (46) 25.9 ppb (25) N/A 23.0 ppb (22) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 46.0
 
Sept. 13, 2021, 10 p.m. 50.4 ppb (48) 30.6 ppb (29) N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 48.0
 
Sept. 13, 2021, 9 p.m. 49.6 ppb (47) 30.8 ppb (30) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 47.0
 
Sept. 13, 2021, 8 p.m. 46.9 ppb (45) 30.6 ppb (29) N/A 16.0 ppb (16) N/A N/A N/A 0.55 ppb (7) N/A 7.0 μg/m3 (30) 45.0
 
Sept. 13, 2021, 7 p.m. 82.7 ppb (82) 56.5 ppb (54) N/A 26.0 ppb (25) N/A N/A N/A 0.56 ppb (7) N/A 8.0 μg/m3 (34) 82.0
 
Sept. 13, 2021, 6 p.m. 87.1 ppb (87) 62.4 ppb (60) N/A 25.0 ppb (24) N/A N/A N/A 0.46 ppb (6) N/A 10.0 μg/m3 (42) 87.0
 
Sept. 13, 2021, 5 p.m. 91.9 ppb (92) 64.8 ppb (63) N/A 27.0 ppb (26) N/A N/A N/A 0.46 ppb (6) N/A 11.0 μg/m3 (46) 92.0
 
Sept. 13, 2021, 4 p.m. 68.5 ppb (67) 51.0 ppb (49) N/A 18.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 67.0
 
Sept. 13, 2021, 3 p.m. 12.1 ppb (12) 3.9 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 12.0
 
Sept. 13, 2021, 2 p.m. 12.6 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2021, 1 p.m. 8.1 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 13, 2021, noon 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 13, 2021, 11 a.m. 3.0 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 13, 2021, 10 a.m. 2.8 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) N/A 1.0 μg/m3 (5) 5.0
 
Sept. 13, 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
 
Sept. 13, 2021, 8 a.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.13 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2021, 7 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 13, 2021, 6 a.m. 3.4 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2021, 5 a.m. 5.1 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Sept. 13, 2021, 4 a.m. 5.4 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 13, 2021, 3 a.m. 6.7 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 13, 2021, 2 a.m. 5.8 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 13, 2021, 1 a.m. 5.6 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 13, 2021, midnight 5.8 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 12, 2021, 11 p.m. 4.8 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 12, 2021, 10 p.m. 7.0 ppb (7) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 12, 2021, 9 p.m. 15.3 ppb (15) 6.3 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 12, 2021, 8 p.m. 23.5 ppb (23) 11.7 ppb (12) N/A 12.0 ppb (12) N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 12, 2021, 7 p.m. 5.9 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2021, 6 p.m. 5.1 ppb (5) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2021, 5 p.m. 4.8 ppb (5) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 12, 2021, 4 p.m. 4.6 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2021, 3 p.m. 5.5 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2021, 2 p.m. 6.0 ppb (6) 1.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 12, 2021, 1 p.m. 14.2 ppb (14) 5.5 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2021, noon 11.1 ppb (11) 2.8 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.19 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2021, 11 a.m. 23.6 ppb (23) 8.5 ppb (9) N/A 15.0 ppb (15) N/A N/A N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 12, 2021, 10 a.m. 17.9 ppb (17) 5.1 ppb (5) N/A 13.0 ppb (13) N/A N/A N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 12, 2021, 9 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
 
Sept. 12, 2021, 8 a.m. 21.6 ppb (21) 6.8 ppb (7) N/A 15.0 ppb (15) N/A N/A N/A 0.31 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 12, 2021, 7 a.m. 42.1 ppb (40) 17.3 ppb (17) N/A 25.0 ppb (24) N/A N/A N/A 0.64 ppb (7) N/A 7.0 μg/m3 (30) 40.0
 
Sept. 12, 2021, 6 a.m. 53.2 ppb (51) 26.7 ppb (26) N/A 26.0 ppb (25) N/A N/A N/A 0.54 ppb (6) N/A 8.0 μg/m3 (34) 51.0
 
Sept. 12, 2021, 5 a.m. 57.4 ppb (55) 29.8 ppb (29) N/A 28.0 ppb (27) N/A N/A N/A 0.59 ppb (7) N/A 6.0 μg/m3 (25) 55.0
 
Sept. 12, 2021, 4 a.m. 25.8 ppb (25) 10.2 ppb (10) N/A 16.0 ppb (16) N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 25.0
 
Sept. 12, 2021, 3 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 12, 2021, 2 a.m. 9.3 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 12, 2021, 1 a.m. 7.6 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 12, 2021, midnight 9.6 ppb (10) 3.5 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2021, 11 p.m. 60.3 ppb (58) 34.9 ppb (33) N/A 25.0 ppb (24) N/A N/A N/A 0.38 ppb (5) N/A 4.0 μg/m3 (17) 58.0
 
Sept. 11, 2021, 10 p.m. 31.1 ppb (30) 16.6 ppb (16) N/A 14.0 ppb (14) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 30.0
 
Sept. 11, 2021, 9 p.m. 31.2 ppb (30) 18.1 ppb (18) N/A 13.0 ppb (13) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 30.0
 
Sept. 11, 2021, 8 p.m. 19.7 ppb (19) 11.4 ppb (11) N/A 8.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2021, 7 p.m. 28.4 ppb (27) 16.8 ppb (16) N/A 12.0 ppb (12) N/A N/A N/A 0.31 ppb (4) N/A 4.0 μg/m3 (17) 27.0
 
Sept. 11, 2021, 6 p.m. 24.7 ppb (24) 12.9 ppb (13) N/A 12.0 ppb (12) N/A N/A N/A 0.28 ppb (4) N/A 3.0 μg/m3 (13) 24.0
 
Sept. 11, 2021, 5 p.m. 26.9 ppb (26) 14.8 ppb (14) N/A 12.0 ppb (12) N/A N/A N/A 0.31 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Sept. 11, 2021, 4 p.m. 32.4 ppb (31) 18.9 ppb (18) N/A 14.0 ppb (14) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 31.0
 
Sept. 11, 2021, 3 p.m. 37.7 ppb (36) 22.3 ppb (22) N/A 15.0 ppb (15) N/A N/A N/A 0.39 ppb (5) N/A 6.0 μg/m3 (25) 36.0
 
Sept. 11, 2021, 2 p.m. 31.0 ppb (30) 15.9 ppb (15) N/A 15.0 ppb (15) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (13) 30.0
 
Sept. 11, 2021, 1 p.m. 17.6 ppb (17) 7.7 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.28 ppb (4) N/A 2.0 μg/m3 (9) 17.0
 
Sept. 11, 2021, noon 7.2 ppb (7) 2.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (3) N/A 1.0 μg/m3 (5) 7.0
 
Sept. 11, 2021, 11 a.m. 5.9 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 11, 2021, 10 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
 
Sept. 11, 2021, 9 a.m. 8.8 ppb (9) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 11, 2021, 8 a.m. 8.4 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 11, 2021, 7 a.m. 12.5 ppb (12) 4.2 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2021, 6 a.m. 22.7 ppb (22) 9.5 ppb (9) N/A 13.0 ppb (13) N/A N/A N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 11, 2021, 5 a.m. 24.0 ppb (23) 12.0 ppb (12) N/A 12.0 ppb (12) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 11, 2021, 4 a.m. 24.2 ppb (23) 11.3 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 11, 2021, 3 a.m. 25.5 ppb (25) 11.5 ppb (11) N/A 14.0 ppb (14) N/A N/A N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 11, 2021, 2 a.m. 25.8 ppb (25) 10.5 ppb (10) N/A 15.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 25.0
 
Sept. 11, 2021, 1 a.m. 15.5 ppb (15) 4.6 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 0.0 μg/m3 (0) 15.0
 
Sept. 11, 2021, midnight 22.2 ppb (21) 8.1 ppb (8) N/A 14.0 ppb (14) N/A N/A N/A 0.3 ppb (4) N/A 2.0 μg/m3 (9) 21.0
 
Sept. 10, 2021, 11 p.m. 29.9 ppb (29) 13.7 ppb (13) N/A 16.0 ppb (16) N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 29.0
 
Sept. 10, 2021, 10 p.m. 32.8 ppb (31) 18.7 ppb (18) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 31.0
 
Sept. 10, 2021, 9 p.m. 41.1 ppb (39) 22.2 ppb (21) N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (5) N/A 3.0 μg/m3 (13) 39.0
 
Sept. 10, 2021, 8 p.m. 51.4 ppb (49) 31.2 ppb (30) N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 4.0 μg/m3 (17) 49.0
 
Sept. 10, 2021, 7 p.m. 48.6 ppb (46) 28.7 ppb (28) N/A 20.0 ppb (19) N/A N/A N/A 0.39 ppb (5) N/A 4.0 μg/m3 (17) 46.0
 
Sept. 10, 2021, 6 p.m. 62.5 ppb (61) 38.6 ppb (37) N/A 24.0 ppb (23) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 61.0
 
Sept. 10, 2021, 5 p.m. 86.8 ppb (86) 59.4 ppb (57) N/A 27.0 ppb (26) N/A N/A N/A 0.47 ppb (6) N/A 7.0 μg/m3 (30) 86.0
 
Sept. 10, 2021, 4 p.m. 77.9 ppb (77) 48.3 ppb (46) N/A 30.0 ppb (29) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 77.0
 
Sept. 10, 2021, 3 p.m. 60.9 ppb (59) 40.3 ppb (39) N/A 21.0 ppb (20) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 59.0
 
Sept. 10, 2021, 2 p.m. 66.9 ppb (65) 42.7 ppb (41) N/A 24.0 ppb (23) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 65.0
 
Sept. 10, 2021, 1 p.m. 71.9 ppb (71) 46.6 ppb (44) N/A 25.0 ppb (24) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 71.0
 
Sept. 10, 2021, noon 55.0 ppb (53) 31.7 ppb (30) N/A 23.0 ppb (22) N/A N/A N/A 0.56 ppb (7) N/A 2.0 μg/m3 (9) 53.0
 
Sept. 10, 2021, 11 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
 
Sept. 10, 2021, 10 a.m. 13.1 ppb (13) 3.7 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.16 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2021, 9 a.m. 9.6 ppb (10) 2.6 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.19 ppb (3) N/A 2.0 μg/m3 (9) 10.0
 
Sept. 10, 2021, 8 a.m. 16.2 ppb (16) 4.9 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.19 ppb (3) N/A 3.0 μg/m3 (13) 16.0
 
Sept. 10, 2021, 7 a.m. 17.3 ppb (17) 7.5 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 10, 2021, 6 a.m. 18.5 ppb (18) 8.5 ppb (9) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2021, 5 a.m. 15.7 ppb (15) 6.5 ppb (7) N/A 9.0 ppb (9) N/A N/A N/A 0.31 ppb (4) N/A -2.0 μg/m3 (0) 15.0
 
Sept. 10, 2021, 4 a.m. 30.7 ppb (29) 16.2 ppb (16) N/A 15.0 ppb (15) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (9) 29.0
 
Sept. 10, 2021, 3 a.m. 29.7 ppb (29) 16.2 ppb (16) N/A 13.0 ppb (13) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 29.0
 
Sept. 10, 2021, 2 a.m. 31.8 ppb (30) 18.8 ppb (18) N/A 13.0 ppb (13) N/A N/A N/A 0.37 ppb (5) N/A 2.0 μg/m3 (9) 30.0
 
Sept. 10, 2021, 1 a.m. 27.8 ppb (27) 16.1 ppb (16) N/A 12.0 ppb (12) N/A N/A N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 27.0