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 |