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 |