Birmingham (N Birmingham) AL, US: 33.5531, -86.815
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 21, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 23.0 μg/m3 (22) | N/A | 42.0 | |
| April 21, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 17.6 μg/m3 (17) | N/A | 38.0 | |
| April 21, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 12.3 μg/m3 (12) | N/A | 34.0 | |
| April 21, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 11.8 μg/m3 (11) | N/A | 33.0 | |
| April 21, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 12.0 μg/m3 (12) | N/A | 33.0 | |
| April 21, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 10.3 μg/m3 (10) | N/A | 36.0 | |
| April 21, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 10.6 μg/m3 (10) | N/A | 33.0 | |
| April 21, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 14.8 μg/m3 (14) | N/A | 27.0 | |
| April 21, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 16.6 μg/m3 (16) | N/A | 26.0 | |
| April 21, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 25.5 μg/m3 (24) | N/A | 25.0 | |
| April 21, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 27.7 μg/m3 (26) | N/A | 26.0 | |
| April 21, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 29.0 μg/m3 (27) | N/A | 28.0 | |
| April 21, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 35.3 μg/m3 (33) | N/A | 33.0 | |
| April 21, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 32.0 μg/m3 (30) | N/A | 30.0 | |
| April 21, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 28.9 μg/m3 (27) | N/A | 27.0 | |
| April 21, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 21.8 μg/m3 (21) | N/A | 21.0 | |
| April 21, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 24.6 μg/m3 (23) | N/A | 29.0 | |
| April 21, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 18.4 μg/m3 (18) | N/A | 41.0 | |
| April 21, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 18.0 μg/m3 (17) | N/A | 45.0 | |
| April 20, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (50) | N/A | 17.0 μg/m3 (16) | N/A | 50.0 | |
| April 20, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (68) | N/A | 19.3 μg/m3 (18) | N/A | 68.0 | |
| April 20, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 ppb (81) | N/A | 20.4 μg/m3 (19) | N/A | 81.0 | |
| April 20, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (74) | N/A | 20.6 μg/m3 (20) | N/A | 74.0 | |
| April 20, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (65) | N/A | 22.7 μg/m3 (22) | N/A | 65.0 | |
| April 20, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (68) | N/A | 20.8 μg/m3 (20) | N/A | 68.0 | |
| April 20, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | N/A | 21.1 μg/m3 (20) | N/A | 61.0 | |
| April 20, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (50) | N/A | 28.6 μg/m3 (27) | N/A | 50.0 | |
| April 20, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 19.5 μg/m3 (19) | N/A | 46.0 | |
| April 20, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 45.9 μg/m3 (43) | N/A | 43.0 | |
| April 20, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 67.5 μg/m3 (58) | N/A | 58.0 | |
| April 20, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 74.4 μg/m3 (61) | N/A | 61.0 | |
| April 20, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 96.5 μg/m3 (72) | N/A | 72.0 | |
| April 20, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 65.7 μg/m3 (57) | N/A | 57.0 | |
| April 20, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 60.5 μg/m3 (54) | N/A | 54.0 | |
| April 20, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 51.8 μg/m3 (48) | N/A | 48.0 | |
| April 20, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 49.6 μg/m3 (46) | N/A | 46.0 | |
| April 20, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 43.0 μg/m3 (40) | N/A | 40.0 | |
| April 20, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 39.8 μg/m3 (37) | N/A | 37.0 | |
| April 20, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 30.2 μg/m3 (28) | N/A | 28.0 | |
| April 20, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 35.1 μg/m3 (33) | N/A | 33.0 | |
| April 20, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 24.6 μg/m3 (23) | N/A | 23.0 | |
| April 20, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 16.6 μg/m3 (16) | N/A | 28.0 | |
| April 20, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 14.4 μg/m3 (14) | N/A | 35.0 | |
| April 19, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 12.7 μg/m3 (12) | N/A | 44.0 | |
| April 19, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 11.1 μg/m3 (11) | N/A | 46.0 | |
| April 19, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 14.4 μg/m3 (14) | N/A | 45.0 | |
| April 19, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 14.0 μg/m3 (13) | N/A | 44.0 | |
| April 19, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 16.1 μg/m3 (15) | N/A | 43.0 | |
| April 19, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 16.1 μg/m3 (15) | N/A | 42.0 | |
| April 19, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 16.9 μg/m3 (16) | N/A | 41.0 | |
| April 19, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 17.2 μg/m3 (16) | N/A | 39.0 | |
| April 19, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 18.7 μg/m3 (18) | N/A | 37.0 | |
| April 19, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | N/A | N/A | 29.0 | |
| April 19, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 μg/m3 (23) | N/A | 23.0 | |
| April 19, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 19.7 μg/m3 (19) | N/A | 19.0 | |
| April 19, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 15.9 μg/m3 (15) | N/A | 16.0 | |
| April 19, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 15.9 μg/m3 (15) | N/A | 18.0 | |
| April 19, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 13.6 μg/m3 (13) | N/A | 22.0 | |
| April 19, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 13.7 μg/m3 (13) | N/A | 25.0 | |
| April 19, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 12.7 μg/m3 (12) | N/A | 25.0 | |
| April 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 13.6 μg/m3 (13) | N/A | 25.0 | |
| April 19, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 13.5 μg/m3 (13) | N/A | 27.0 | |
| April 19, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 13.6 μg/m3 (13) | N/A | 26.0 | |
| April 19, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 15.2 μg/m3 (15) | N/A | 28.0 | |
| April 19, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 15.1 μg/m3 (14) | N/A | 30.0 | |
| April 19, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 14.3 μg/m3 (14) | N/A | 33.0 | |
| April 19, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 14.3 μg/m3 (14) | N/A | 34.0 | |
| April 18, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 13.8 μg/m3 (13) | N/A | 40.0 | |
| April 18, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 14.6 μg/m3 (14) | N/A | 42.0 | |
| April 18, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 14.9 μg/m3 (14) | N/A | 44.0 | |
| April 18, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 16.4 μg/m3 (16) | N/A | 44.0 | |
| April 18, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 17.8 μg/m3 (17) | N/A | 46.0 | |
| April 18, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 17.3 μg/m3 (17) | N/A | 44.0 | |
| April 18, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 16.6 μg/m3 (16) | N/A | 43.0 | |
| April 18, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 16.8 μg/m3 (16) | N/A | 44.0 | |
| April 18, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 22.6 μg/m3 (21) | N/A | 41.0 | |
| April 18, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 25.5 μg/m3 (24) | N/A | 33.0 | |
| April 18, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 20.2 μg/m3 (19) | N/A | 28.0 | |
| April 18, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 18.1 μg/m3 (17) | N/A | 21.0 | |
| April 18, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 16.5 μg/m3 (16) | N/A | 16.0 | |
| April 18, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 17.4 μg/m3 (17) | N/A | 17.0 | |
| April 18, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 16.5 μg/m3 (16) | N/A | 21.0 | |
| April 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 17.2 μg/m3 (16) | N/A | 25.0 | |
| April 18, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 16.5 μg/m3 (16) | N/A | 30.0 | |
| April 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 16.5 μg/m3 (16) | N/A | 33.0 | |
| April 18, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 17.5 μg/m3 (17) | N/A | 35.0 | |
| April 18, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 16.8 μg/m3 (16) | N/A | 35.0 | |
| April 18, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 17.9 μg/m3 (17) | N/A | 35.0 | |
| April 18, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 17.6 μg/m3 (17) | N/A | 37.0 | |
| April 18, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 17.1 μg/m3 (16) | N/A | 39.0 | |
| April 18, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 14.8 μg/m3 (14) | N/A | 41.0 | |
| April 17, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 13.0 μg/m3 (13) | N/A | 44.0 | |
| April 17, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 13.2 μg/m3 (13) | N/A | 46.0 | |
| April 17, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 13.3 μg/m3 (13) | N/A | 47.0 | |
| April 17, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | N/A | 12.5 μg/m3 (12) | N/A | 48.0 | |
| April 17, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 12.7 μg/m3 (12) | N/A | 46.0 | |
| April 17, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 15.9 μg/m3 (15) | N/A | 45.0 | |
| April 17, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 15.5 μg/m3 (15) | N/A | 41.0 | |
| April 17, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 15.3 μg/m3 (15) | N/A | 38.0 | |
| April 17, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 18.5 μg/m3 (18) | N/A | 35.0 | |
| April 17, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 22.7 μg/m3 (22) | N/A | 22.0 | |
| April 17, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 21.2 μg/m3 (20) | N/A | 20.0 | |
| April 17, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 22.4 μg/m3 (21) | N/A | 21.0 | |
| April 17, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 23.7 μg/m3 (22) | N/A | 22.0 | |
| April 17, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 26.2 μg/m3 (25) | N/A | 25.0 | |
| April 17, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 20.5 μg/m3 (19) | N/A | 19.0 | |
| April 17, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 21.1 μg/m3 (20) | N/A | 20.0 | |
| April 17, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 22.3 μg/m3 (21) | N/A | 21.0 | |
| April 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 24.2 μg/m3 (23) | N/A | 23.0 | |
| April 17, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 21.3 μg/m3 (20) | N/A | 20.0 | |
| April 17, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 21.4 μg/m3 (20) | N/A | 20.0 | |
| April 17, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 17.6 μg/m3 (17) | N/A | 17.0 | |
| April 17, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 18.3 μg/m3 (17) | N/A | 17.0 | |
| April 17, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 21.8 μg/m3 (21) | N/A | 25.0 | |
| April 17, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 12.7 μg/m3 (12) | N/A | 31.0 | |
| April 16, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 19.7 μg/m3 (19) | N/A | 33.0 | |
| April 16, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 14.7 μg/m3 (14) | N/A | 38.0 | |
| April 16, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 15.4 μg/m3 (15) | N/A | 45.0 | |
| April 16, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 15.5 μg/m3 (15) | N/A | 47.0 | |
| April 16, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 15.1 μg/m3 (14) | N/A | 46.0 | |
| April 16, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 11.7 μg/m3 (11) | N/A | 43.0 | |
| April 16, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 14.9 μg/m3 (14) | N/A | 39.0 | |
| April 16, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 16.7 μg/m3 (16) | N/A | 36.0 | |
| April 16, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 16.5 μg/m3 (16) | N/A | 33.0 | |
| April 16, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 13.5 μg/m3 (13) | N/A | 31.0 | |
| April 16, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 18.9 μg/m3 (18) | N/A | 23.0 | |
| April 16, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 17.7 μg/m3 (17) | N/A | 18.0 | |
| April 16, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 15.3 μg/m3 (15) | N/A | 15.0 | |
| April 16, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 15.7 μg/m3 (15) | N/A | 27.0 | |
| April 16, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 15.6 μg/m3 (15) | N/A | 25.0 | |
| April 16, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 16.6 μg/m3 (16) | N/A | 29.0 | |
| April 16, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 14.6 μg/m3 (14) | N/A | 27.0 | |
| April 16, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 14.7 μg/m3 (14) | N/A | 29.0 | |
| April 16, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 15.9 μg/m3 (15) | N/A | 31.0 | |
| April 16, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 15.6 μg/m3 (15) | N/A | 33.0 | |
| April 16, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 16.2 μg/m3 (15) | N/A | 36.0 | |
| April 16, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 16.4 μg/m3 (16) | N/A | 38.0 | |
| April 16, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 16.6 μg/m3 (16) | N/A | 41.0 | |
| April 16, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 16.8 μg/m3 (16) | N/A | 40.0 | |
| April 15, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 18.2 μg/m3 (17) | N/A | 45.0 | |
| April 15, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (50) | N/A | 19.4 μg/m3 (18) | N/A | 50.0 | |
| April 15, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 22.5 μg/m3 (21) | N/A | 49.0 | |
| April 15, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (50) | N/A | 19.0 μg/m3 (18) | N/A | 50.0 | |
| April 15, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 18.9 μg/m3 (18) | N/A | 49.0 | |
| April 15, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 17.8 μg/m3 (17) | N/A | 49.0 | |
| April 15, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 16.0 μg/m3 (15) | N/A | 46.0 | |
| April 15, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 19.3 μg/m3 (18) | N/A | 40.0 | |
| April 15, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 17.0 μg/m3 (16) | N/A | 38.0 | |
| April 15, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 14.3 μg/m3 (14) | N/A | 33.0 | |
| April 15, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 15.4 μg/m3 (15) | N/A | 26.0 | |
| April 15, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 18.8 μg/m3 (18) | N/A | 18.0 | |
| April 15, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 20.3 μg/m3 (19) | N/A | 20.0 | |
| April 15, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 18.2 μg/m3 (17) | N/A | 26.0 | |
| April 15, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 20.1 μg/m3 (19) | N/A | 31.0 | |
| April 15, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 15.7 μg/m3 (15) | N/A | 28.0 | |
| April 15, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 12.3 μg/m3 (12) | N/A | 27.0 | |
| April 15, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 15.0 μg/m3 (14) | N/A | 26.0 | |
| April 15, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 15.9 μg/m3 (15) | N/A | 27.0 | |
| April 15, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 17.2 μg/m3 (16) | N/A | 29.0 | |
| April 15, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 18.2 μg/m3 (17) | N/A | 38.0 | |
| April 15, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 17.0 μg/m3 (16) | N/A | 39.0 | |
| April 15, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 19.7 μg/m3 (19) | N/A | 38.0 | |
| April 15, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 20.5 μg/m3 (19) | N/A | 35.0 | |
| April 14, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 22.0 μg/m3 (21) | N/A | 34.0 | |
| April 14, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 25.3 μg/m3 (24) | N/A | 37.0 | |
| April 14, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 28.0 μg/m3 (26) | N/A | 38.0 | |
| April 14, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 25.6 μg/m3 (24) | N/A | 40.0 | |
| April 14, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 23.4 μg/m3 (22) | N/A | 38.0 |