Portland (Foster-Powell) OR, US: 45.496641, -122.602877
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 11, 2021, 1 a.m. | 2.6 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 38.0 | |
| April 11, 2021, midnight | 2.5 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.12 ppb (2) | N/A | 3.0 μg/m3 (13) | 38.0 | |
| April 10, 2021, 11 p.m. | 2.0 ppb (2) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 40.0 | |
| April 10, 2021, 10 p.m. | 2.2 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.14 ppb (2) | N/A | 2.5 μg/m3 (11) | 40.0 | |
| April 10, 2021, 9 p.m. | 2.8 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.13 ppb (2) | N/A | 2.4 μg/m3 (10) | 39.0 | |
| April 10, 2021, 8 p.m. | 3.4 ppb (4) | 1.2 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.16 ppb (3) | N/A | 2.5 μg/m3 (11) | 40.0 | |
| April 10, 2021, 7 p.m. | 2.6 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.12 ppb (2) | N/A | 2.4 μg/m3 (10) | 40.0 | |
| April 10, 2021, 6 p.m. | 3.5 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.12 ppb (2) | N/A | 2.7 μg/m3 (12) | 39.0 | |
| April 10, 2021, 5 p.m. | 3.5 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.13 ppb (2) | N/A | 3.4 μg/m3 (15) | 40.0 | |
| April 10, 2021, 4 p.m. | 3.5 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.12 ppb (2) | N/A | 3.7 μg/m3 (16) | 40.0 | |
| April 10, 2021, 3 p.m. | 5.0 ppb (5) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 37.0 | |
| April 10, 2021, 2 p.m. | 4.7 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.13 ppb (2) | N/A | 2.5 μg/m3 (11) | 34.0 | |
| April 10, 2021, 1 p.m. | 6.0 ppb (6) | 0.2 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.11 ppb (2) | N/A | 2.6 μg/m3 (11) | 26.0 | |
| April 10, 2021, noon | 3.1 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.11 ppb (2) | N/A | 3.6 μg/m3 (16) | 31.0 | |
| April 10, 2021, 11 a.m. | 1.6 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.11 ppb (2) | N/A | 3.8 μg/m3 (16) | 34.0 | |
| April 10, 2021, 10 a.m. | 1.2 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.11 ppb (2) | N/A | 3.7 μg/m3 (16) | 36.0 | |
| April 10, 2021, 9 a.m. | 1.1 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.11 ppb (2) | N/A | 3.7 μg/m3 (16) | 39.0 | |
| April 10, 2021, 8 a.m. | 1.3 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.12 ppb (2) | N/A | 4.2 μg/m3 (18) | 40.0 | |
| April 10, 2021, 7 a.m. | 1.4 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.12 ppb (2) | N/A | 4.0 μg/m3 (17) | 39.0 | |
| April 10, 2021, 6 a.m. | 1.4 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.11 ppb (2) | N/A | 3.6 μg/m3 (16) | 41.0 | |
| April 10, 2021, 5 a.m. | 2.6 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.13 ppb (2) | N/A | 4.2 μg/m3 (18) | 39.0 | |
| April 10, 2021, 4 a.m. | 2.5 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.14 ppb (2) | N/A | 4.5 μg/m3 (19) | 38.0 | |
| April 10, 2021, 3 a.m. | 2.9 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.14 ppb (2) | N/A | 3.8 μg/m3 (16) | 39.0 | |
| April 10, 2021, 2 a.m. | 2.3 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.13 ppb (2) | N/A | 3.2 μg/m3 (14) | 40.0 | |
| April 10, 2021, 1 a.m. | 2.9 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.13 ppb (2) | N/A | 3.5 μg/m3 (15) | 40.0 | |
| April 10, 2021, midnight | 1.8 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.13 ppb (2) | N/A | 3.9 μg/m3 (17) | 40.0 | |
| April 9, 2021, 11 p.m. | 1.6 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.12 ppb (2) | N/A | 4.1 μg/m3 (18) | 40.0 | |
| April 9, 2021, 10 p.m. | 1.6 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.13 ppb (2) | N/A | 4.1 μg/m3 (18) | 41.0 | |
| April 9, 2021, 9 p.m. | 1.9 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.13 ppb (2) | N/A | 4.6 μg/m3 (20) | 42.0 | |
| April 9, 2021, 8 p.m. | 4.3 ppb (5) | 1.3 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.14 ppb (2) | N/A | 4.4 μg/m3 (19) | 38.0 | |
| April 9, 2021, 7 p.m. | 11.7 ppb (12) | 4.2 ppb (4) | N/A | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.18 ppb (3) | N/A | 4.8 μg/m3 (20) | 31.0 | |
| April 9, 2021, 6 p.m. | 12.2 ppb (12) | 4.4 ppb (5) | N/A | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.16 ppb (3) | N/A | 5.1 μg/m3 (22) | 30.0 | |
| April 9, 2021, 5 p.m. | 15.2 ppb (15) | 6.0 ppb (6) | N/A | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.17 ppb (3) | N/A | 5.8 μg/m3 (25) | 25.0 | |
| April 9, 2021, 4 p.m. | 18.9 ppb (18) | 8.1 ppb (8) | N/A | 11.0 ppb (11) | N/A | 1.0 ppb (2) | 20.0 ppb (19) | 0.21 ppb (3) | N/A | 6.4 μg/m3 (27) | 27.0 | |
| April 9, 2021, 3 p.m. | 23.5 ppb (23) | 9.6 ppb (10) | N/A | 14.0 ppb (14) | N/A | 1.0 ppb (2) | 15.0 ppb (14) | 0.21 ppb (3) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| April 9, 2021, 2 p.m. | 81.3 ppb (81) | 57.2 ppb (55) | N/A | 24.0 ppb (23) | N/A | 1.0 ppb (2) | 2.0 ppb (2) | 0.66 ppb (8) | N/A | 9.1 μg/m3 (38) | 81.0 | |
| April 9, 2021, 1 p.m. | 57.3 ppb (55) | 33.3 ppb (32) | N/A | 24.0 ppb (23) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.49 ppb (6) | N/A | 6.7 μg/m3 (28) | 55.0 | |
| April 9, 2021, noon | 32.6 ppb (31) | 9.5 ppb (9) | N/A | 23.0 ppb (22) | N/A | 0.0 ppb (0) | 3.0 ppb (3) | 0.33 ppb (4) | N/A | 5.5 μg/m3 (23) | 31.0 | |
| April 9, 2021, 11 a.m. | 22.9 ppb (22) | 3.3 ppb (4) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | 8.0 ppb (8) | 0.28 ppb (4) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| April 9, 2021, 10 a.m. | 24.2 ppb (23) | 3.7 ppb (4) | N/A | 21.0 ppb (20) | N/A | 0.0 ppb (0) | 6.0 ppb (6) | 0.3 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 9, 2021, 9 a.m. | 16.4 ppb (16) | 1.7 ppb (2) | N/A | 15.0 ppb (15) | N/A | 0.0 ppb (0) | 13.0 ppb (13) | 0.18 ppb (3) | N/A | 3.6 μg/m3 (16) | 16.0 | |
| April 9, 2021, 8 a.m. | 7.7 ppb (8) | 0.5 ppb (1) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.14 ppb (2) | N/A | 3.3 μg/m3 (14) | 26.0 | |
| April 9, 2021, 7 a.m. | 4.9 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.12 ppb (2) | N/A | 3.4 μg/m3 (15) | 34.0 | |
| April 9, 2021, 6 a.m. | 4.6 ppb (5) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.13 ppb (2) | N/A | 3.8 μg/m3 (16) | 37.0 | |
| April 9, 2021, 5 a.m. | 3.8 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.13 ppb (2) | N/A | 3.8 μg/m3 (16) | 38.0 | |
| April 9, 2021, 4 a.m. | 4.5 ppb (5) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.13 ppb (2) | N/A | 3.5 μg/m3 (15) | 38.0 | |
| April 9, 2021, 3 a.m. | 7.5 ppb (8) | 0.4 ppb (1) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.18 ppb (3) | N/A | 6.6 μg/m3 (28) | 35.0 | |
| April 9, 2021, 2 a.m. | 5.1 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.16 ppb (3) | N/A | 3.7 μg/m3 (16) | 38.0 | |
| April 9, 2021, 1 a.m. | 3.8 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.14 ppb (2) | N/A | 3.3 μg/m3 (14) | 40.0 | |
| April 9, 2021, midnight | 4.5 ppb (5) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.14 ppb (2) | N/A | 3.6 μg/m3 (16) | 40.0 | |
| April 8, 2021, 11 p.m. | 3.0 ppb (3) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.14 ppb (2) | N/A | 3.4 μg/m3 (15) | 42.0 | |
| April 8, 2021, 10 p.m. | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.13 ppb (2) | N/A | 3.4 μg/m3 (15) | 42.0 | |
| April 8, 2021, 9 p.m. | 4.1 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.13 ppb (2) | N/A | 3.5 μg/m3 (15) | 41.0 | |
| April 8, 2021, 8 p.m. | 2.7 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.12 ppb (2) | N/A | 3.2 μg/m3 (14) | 41.0 | |
| April 8, 2021, 7 p.m. | 3.1 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.13 ppb (2) | N/A | 3.0 μg/m3 (13) | 39.0 | |
| April 8, 2021, 6 p.m. | 4.3 ppb (5) | 1.2 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.13 ppb (2) | N/A | 3.0 μg/m3 (13) | 38.0 | |
| April 8, 2021, 5 p.m. | 4.1 ppb (4) | 1.3 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.11 ppb (2) | N/A | 2.6 μg/m3 (11) | 37.0 | |
| April 8, 2021, 4 p.m. | 7.8 ppb (8) | 2.4 ppb (3) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.11 ppb (2) | N/A | 2.5 μg/m3 (11) | 35.0 | |
| April 8, 2021, 3 p.m. | 11.1 ppb (11) | 2.5 ppb (3) | N/A | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.13 ppb (2) | N/A | 2.6 μg/m3 (11) | 30.0 | |
| April 8, 2021, 2 p.m. | 18.9 ppb (18) | 2.2 ppb (3) | N/A | 17.0 ppb (17) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.21 ppb (3) | N/A | 3.2 μg/m3 (14) | 18.0 | |
| April 8, 2021, 1 p.m. | 8.5 ppb (9) | 0.2 ppb (1) | N/A | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.13 ppb (2) | N/A | 2.6 μg/m3 (11) | 24.0 | |
| April 8, 2021, noon | 7.0 ppb (7) | 0.4 ppb (1) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.13 ppb (2) | N/A | 2.5 μg/m3 (11) | 25.0 | |
| April 8, 2021, 11 a.m. | 3.8 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.1 ppb (2) | N/A | 2.2 μg/m3 (10) | 31.0 | |
| April 8, 2021, 10 a.m. | 2.9 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.1 ppb (2) | N/A | 2.3 μg/m3 (10) | 30.0 | |
| April 8, 2021, 9 a.m. | 1.4 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.08 ppb (2) | N/A | 2.1 μg/m3 (9) | 34.0 | |
| April 8, 2021, 8 a.m. | 1.4 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.09 ppb (2) | N/A | 2.5 μg/m3 (11) | 37.0 | |
| April 8, 2021, 7 a.m. | 1.8 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.09 ppb (2) | N/A | 2.4 μg/m3 (10) | 36.0 | |
| April 8, 2021, 6 a.m. | 1.6 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.12 ppb (2) | N/A | 3.6 μg/m3 (16) | 37.0 | |
| April 8, 2021, 5 a.m. | 1.2 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.09 ppb (2) | N/A | 2.7 μg/m3 (12) | 39.0 | |
| April 8, 2021, 4 a.m. | 1.9 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.11 ppb (2) | N/A | 2.7 μg/m3 (12) | 38.0 | |
| April 8, 2021, 3 a.m. | 2.3 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.1 ppb (2) | N/A | 2.5 μg/m3 (11) | 35.0 | |
| April 8, 2021, 2 a.m. | 2.6 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.09 ppb (2) | N/A | 2.2 μg/m3 (10) | 36.0 | |
| April 8, 2021, 1 a.m. | 3.0 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.1 ppb (2) | N/A | 2.3 μg/m3 (10) | 35.0 | |
| April 8, 2021, midnight | 3.3 ppb (4) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.11 ppb (2) | N/A | 4.2 μg/m3 (18) | 34.0 | |
| April 7, 2021, 11 p.m. | 2.9 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.11 ppb (2) | N/A | 5.4 μg/m3 (23) | 34.0 | |
| April 7, 2021, 10 p.m. | 2.7 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.11 ppb (2) | N/A | 5.4 μg/m3 (23) | 35.0 | |
| April 7, 2021, 9 p.m. | 2.4 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.11 ppb (2) | N/A | 5.5 μg/m3 (23) | 36.0 | |
| April 7, 2021, 8 p.m. | 2.8 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.11 ppb (2) | N/A | 4.8 μg/m3 (20) | 35.0 | |
| April 7, 2021, 7 p.m. | 3.1 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.1 ppb (2) | N/A | 4.9 μg/m3 (21) | 32.0 | |
| April 7, 2021, 6 p.m. | 7.4 ppb (7) | 2.1 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.14 ppb (2) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| April 7, 2021, 5 p.m. | 8.8 ppb (9) | 1.9 ppb (2) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.14 ppb (2) | N/A | 6.8 μg/m3 (29) | 29.0 | |
| April 7, 2021, 4 p.m. | 12.1 ppb (12) | 2.0 ppb (2) | N/A | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.16 ppb (3) | N/A | 6.4 μg/m3 (27) | 27.0 | |
| April 7, 2021, 3 p.m. | 12.8 ppb (13) | 1.2 ppb (2) | N/A | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.15 ppb (2) | N/A | 4.3 μg/m3 (18) | 22.0 | |
| April 7, 2021, 2 p.m. | 14.5 ppb (14) | 1.3 ppb (2) | N/A | 13.0 ppb (13) | N/A | 0.0 ppb (0) | 18.0 ppb (17) | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 7, 2021, 1 p.m. | 15.6 ppb (15) | 1.4 ppb (2) | N/A | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 11.0 ppb (11) | 0.18 ppb (3) | N/A | 4.7 μg/m3 (20) | 20.0 | |
| April 7, 2021, noon | 6.0 ppb (6) | 0.3 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.11 ppb (2) | N/A | 4.0 μg/m3 (17) | 23.0 | |
| April 7, 2021, 11 a.m. | 13.5 ppb (13) | 1.2 ppb (2) | N/A | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.17 ppb (3) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| April 7, 2021, 10 a.m. | 9.3 ppb (9) | 0.5 ppb (1) | N/A | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 16.0 ppb (15) | 0.14 ppb (2) | N/A | 7.4 μg/m3 (31) | 31.0 | |
| April 7, 2021, 9 a.m. | 11.0 ppb (11) | 0.7 ppb (1) | N/A | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.19 ppb (3) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| April 7, 2021, 8 a.m. | 15.3 ppb (15) | 1.4 ppb (2) | N/A | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 8.0 ppb (8) | 0.26 ppb (4) | N/A | 8.1 μg/m3 (34) | 34.0 | |
| April 7, 2021, 7 a.m. | 13.6 ppb (13) | 1.0 ppb (1) | N/A | 13.0 ppb (13) | N/A | 0.0 ppb (0) | 12.0 ppb (12) | 0.42 ppb (5) | N/A | 11.8 μg/m3 (50) | 50.0 | |
| April 7, 2021, 6 a.m. | 11.8 ppb (12) | 0.7 ppb (1) | N/A | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.2 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 7, 2021, 5 a.m. | 8.7 ppb (9) | 0.3 ppb (1) | N/A | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.26 ppb (4) | N/A | 12.2 μg/m3 (52) | 52.0 | |
| April 7, 2021, 4 a.m. | 24.3 ppb (23) | 3.5 ppb (4) | N/A | 21.0 ppb (20) | N/A | 1.0 ppb (2) | 15.0 ppb (14) | 0.43 ppb (5) | N/A | 15.5 μg/m3 (59) | 59.0 | |
| April 7, 2021, 3 a.m. | 24.2 ppb (23) | 2.0 ppb (2) | N/A | 22.0 ppb (21) | N/A | 0.0 ppb (0) | 14.0 ppb (13) | 0.39 ppb (5) | N/A | 12.1 μg/m3 (51) | 51.0 | |
| April 7, 2021, 2 a.m. | 8.1 ppb (8) | 0.4 ppb (1) | N/A | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.16 ppb (3) | N/A | 5.7 μg/m3 (24) | 34.0 | |
| April 7, 2021, 1 a.m. | 4.2 ppb (4) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.13 ppb (2) | N/A | 4.2 μg/m3 (18) | 38.0 | |
| April 7, 2021, midnight | 3.5 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.12 ppb (2) | N/A | 4.6 μg/m3 (20) | 38.0 | |
| April 6, 2021, 11 p.m. | 3.7 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.14 ppb (2) | N/A | 4.3 μg/m3 (18) | 38.0 | |
| April 6, 2021, 10 p.m. | 4.7 ppb (5) | 1.2 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.13 ppb (2) | N/A | 3.8 μg/m3 (16) | 40.0 | |
| April 6, 2021, 9 p.m. | 5.5 ppb (6) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.13 ppb (2) | N/A | 4.1 μg/m3 (18) | 38.0 | |
| April 6, 2021, 8 p.m. | 5.7 ppb (6) | 1.8 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.12 ppb (2) | N/A | 4.2 μg/m3 (18) | 36.0 | |
| April 6, 2021, 7 p.m. | 8.1 ppb (8) | 2.8 ppb (3) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.14 ppb (2) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| April 6, 2021, 6 p.m. | 8.4 ppb (8) | 3.2 ppb (4) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.13 ppb (2) | N/A | 5.2 μg/m3 (22) | 28.0 | |
| April 6, 2021, 5 p.m. | 13.2 ppb (13) | 5.7 ppb (6) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.14 ppb (2) | N/A | 5.8 μg/m3 (25) | 25.0 | |
| April 6, 2021, 4 p.m. | 20.0 ppb (19) | 8.4 ppb (8) | N/A | 12.0 ppb (12) | N/A | 1.0 ppb (2) | 19.0 ppb (18) | 0.18 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 6, 2021, 3 p.m. | 24.1 ppb (23) | 8.8 ppb (9) | N/A | 15.0 ppb (15) | N/A | 0.0 ppb (0) | 16.0 ppb (15) | 0.2 ppb (3) | N/A | 6.4 μg/m3 (27) | 27.0 | |
| April 6, 2021, 2 p.m. | 29.4 ppb (28) | 7.3 ppb (7) | N/A | 22.0 ppb (21) | N/A | 0.0 ppb (0) | 10.0 ppb (10) | 0.25 ppb (3) | N/A | 6.2 μg/m3 (26) | 28.0 | |
| April 6, 2021, 1 p.m. | 17.8 ppb (17) | 1.4 ppb (2) | N/A | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.22 ppb (3) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| April 6, 2021, noon | 13.6 ppb (13) | 0.9 ppb (1) | N/A | 13.0 ppb (13) | N/A | 0.0 ppb (0) | 18.0 ppb (17) | 0.18 ppb (3) | N/A | 4.2 μg/m3 (18) | 18.0 | |
| April 6, 2021, 11 a.m. | 19.7 ppb (19) | 3.6 ppb (4) | N/A | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 10.0 ppb (10) | 0.21 ppb (3) | N/A | 5.6 μg/m3 (24) | 24.0 | |
| April 6, 2021, 10 a.m. | 21.3 ppb (21) | 2.7 ppb (3) | N/A | 19.0 ppb (18) | N/A | 0.0 ppb (0) | 5.0 ppb (5) | 0.18 ppb (3) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| April 6, 2021, 9 a.m. | 15.2 ppb (15) | 1.3 ppb (2) | N/A | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.15 ppb (2) | N/A | 4.7 μg/m3 (20) | 20.0 | |
| April 6, 2021, 8 a.m. | 6.3 ppb (6) | 0.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.13 ppb (2) | N/A | 4.2 μg/m3 (18) | 27.0 | |
| April 6, 2021, 7 a.m. | 3.5 ppb (4) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.11 ppb (2) | N/A | 4.1 μg/m3 (18) | 32.0 | |
| April 6, 2021, 6 a.m. | 2.7 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.1 ppb (2) | N/A | 4.0 μg/m3 (17) | 34.0 | |
| April 6, 2021, 5 a.m. | 2.9 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.11 ppb (2) | N/A | 3.9 μg/m3 (17) | 33.0 | |
| April 6, 2021, 4 a.m. | 4.1 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.11 ppb (2) | N/A | 4.1 μg/m3 (18) | 32.0 | |
| April 6, 2021, 3 a.m. | 6.3 ppb (6) | 0.3 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.15 ppb (2) | N/A | 3.9 μg/m3 (17) | 31.0 | |
| April 6, 2021, 2 a.m. | 4.3 ppb (5) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.13 ppb (2) | N/A | 2.9 μg/m3 (13) | 37.0 | |
| April 6, 2021, 1 a.m. | 3.3 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 39.0 | |
| April 6, 2021, midnight | 3.8 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 39.0 | |
| April 5, 2021, 11 p.m. | 3.3 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.11 ppb (2) | N/A | 2.8 μg/m3 (12) | 38.0 | |
| April 5, 2021, 10 p.m. | 3.0 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (38) | 0.11 ppb (2) | N/A | 2.6 μg/m3 (11) | 38.0 | |
| April 5, 2021, 9 p.m. | 4.2 ppb (4) | 1.2 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 39.0 ppb (37) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 37.0 | |
| April 5, 2021, 8 p.m. | 6.3 ppb (6) | 2.2 ppb (3) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 3.2 μg/m3 (14) | 35.0 | |
| April 5, 2021, 7 p.m. | 6.3 ppb (6) | 2.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | N/A | N/A | 3.1 μg/m3 (13) | 35.0 | |
| April 5, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | 0.15 ppb (2) | N/A | 3.7 μg/m3 (16) | 32.0 | |
| April 5, 2021, 5 p.m. | 19.7 ppb (19) | 7.8 ppb (8) | N/A | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.18 ppb (3) | N/A | 4.6 μg/m3 (20) | 25.0 | |
| April 5, 2021, 4 p.m. | 16.8 ppb (16) | 6.2 ppb (6) | N/A | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.18 ppb (3) | N/A | 4.9 μg/m3 (21) | 23.0 | |
| April 5, 2021, 3 p.m. | 21.9 ppb (21) | 7.3 ppb (7) | N/A | 15.0 ppb (15) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.21 ppb (3) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| April 5, 2021, 2 p.m. | 34.4 ppb (33) | 12.1 ppb (12) | N/A | 22.0 ppb (21) | N/A | 0.0 ppb (0) | 8.0 ppb (8) | 0.33 ppb (4) | N/A | 5.7 μg/m3 (24) | 33.0 | |
| April 5, 2021, 1 p.m. | 27.8 ppb (27) | 5.8 ppb (6) | N/A | 22.0 ppb (21) | N/A | 0.0 ppb (0) | 5.0 ppb (5) | 0.27 ppb (4) | N/A | 4.5 μg/m3 (19) | 27.0 | |
| April 5, 2021, noon | 19.9 ppb (19) | 1.7 ppb (2) | N/A | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 9.0 ppb (9) | 0.18 ppb (3) | N/A | 4.3 μg/m3 (18) | 19.0 | |
| April 5, 2021, 11 a.m. | 19.6 ppb (19) | 1.9 ppb (2) | N/A | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 9.0 ppb (9) | 0.19 ppb (3) | N/A | 3.8 μg/m3 (16) | 19.0 | |
| April 5, 2021, 10 a.m. | 17.4 ppb (17) | 1.8 ppb (2) | N/A | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 11.0 ppb (11) | 0.17 ppb (3) | N/A | 3.3 μg/m3 (14) | 17.0 | |
| April 5, 2021, 9 a.m. | 9.3 ppb (9) | 0.4 ppb (1) | N/A | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 23.0 | |
| April 5, 2021, 8 a.m. | 6.3 ppb (6) | 0.3 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.11 ppb (2) | N/A | 2.8 μg/m3 (12) | 28.0 | |
| April 5, 2021, 7 a.m. | 4.4 ppb (5) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.12 ppb (2) | N/A | 4.4 μg/m3 (19) | 34.0 | |
| April 5, 2021, 6 a.m. | 4.2 ppb (4) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.12 ppb (2) | N/A | 2.7 μg/m3 (12) | 35.0 | |
| April 5, 2021, 5 a.m. | 3.2 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 38.0 | |
| April 5, 2021, 4 a.m. | 2.6 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.11 ppb (2) | N/A | 2.7 μg/m3 (12) | 38.0 | |
| April 5, 2021, 3 a.m. | 2.5 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 38.0 | |
| April 5, 2021, 2 a.m. | 2.3 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.11 ppb (2) | N/A | 2.5 μg/m3 (11) | 39.0 | |
| April 5, 2021, 1 a.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.11 ppb (2) | N/A | 2.7 μg/m3 (12) | 41.0 | |
| April 5, 2021, midnight | 1.7 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.11 ppb (2) | N/A | 2.4 μg/m3 (10) | 40.0 | |
| April 4, 2021, 11 p.m. | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.11 ppb (2) | N/A | 2.8 μg/m3 (12) | 39.0 | |
| April 4, 2021, 10 p.m. | 1.7 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.12 ppb (2) | N/A | 2.9 μg/m3 (13) | 38.0 | |
| April 4, 2021, 9 p.m. | 1.9 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.11 ppb (2) | N/A | 2.8 μg/m3 (12) | 38.0 | |
| April 4, 2021, 8 p.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.11 ppb (2) | N/A | 2.7 μg/m3 (12) | 37.0 | |
| April 4, 2021, 7 p.m. | 1.4 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.11 ppb (2) | N/A | 2.5 μg/m3 (11) | 39.0 | |
| April 4, 2021, 6 p.m. | 1.7 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.1 ppb (2) | N/A | 2.5 μg/m3 (11) | 38.0 | |
| April 4, 2021, 5 p.m. | 2.7 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.13 ppb (2) | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 4, 2021, 4 p.m. | 2.5 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.09 ppb (2) | N/A | 2.3 μg/m3 (10) | 32.0 | |
| April 4, 2021, 3 p.m. | 2.6 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.09 ppb (2) | N/A | 2.2 μg/m3 (10) | 31.0 | |
| April 4, 2021, 2 p.m. | 6.5 ppb (7) | 0.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.11 ppb (2) | N/A | 2.5 μg/m3 (11) | 26.0 | |
| April 4, 2021, 1 p.m. | 6.1 ppb (6) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.13 ppb (2) | N/A | 4.4 μg/m3 (19) | 25.0 | |
| April 4, 2021, noon | 5.2 ppb (5) | 0.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.1 ppb (2) | N/A | 4.4 μg/m3 (19) | 25.0 | |
| April 4, 2021, 11 a.m. | 3.9 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.1 ppb (2) | N/A | 3.5 μg/m3 (15) | 24.0 | |
| April 4, 2021, 10 a.m. | 4.5 ppb (5) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.1 ppb (2) | N/A | 4.0 μg/m3 (17) | 24.0 | |
| April 4, 2021, 9 a.m. | 4.9 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.1 ppb (2) | N/A | 3.1 μg/m3 (13) | 23.0 | |
| April 4, 2021, 8 a.m. | 3.4 ppb (4) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.1 ppb (2) | N/A | 3.1 μg/m3 (13) | 28.0 | |
| April 4, 2021, 7 a.m. | 4.8 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.13 ppb (2) | N/A | 4.5 μg/m3 (19) | 26.0 | |
| April 4, 2021, 6 a.m. | 3.4 ppb (4) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.1 ppb (2) | N/A | 3.2 μg/m3 (14) | 29.0 | |
| April 4, 2021, 5 a.m. | 3.4 ppb (4) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 32.0 ppb (30) | 0.1 ppb (2) | N/A | 2.7 μg/m3 (12) | 30.0 | |
| April 4, 2021, 4 a.m. | 4.0 ppb (4) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.11 ppb (2) | N/A | 2.7 μg/m3 (12) | 31.0 | |
| April 4, 2021, 3 a.m. | 3.2 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.11 ppb (2) | N/A | 2.8 μg/m3 (12) | 34.0 | |
| April 4, 2021, 2 a.m. | 3.5 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.11 ppb (2) | N/A | 2.9 μg/m3 (13) | 35.0 |