Cedar Rapids (C Ave Nwest) IA, US: 41.9767, -91.6878
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 11, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 3.3 μg/m3 (14) | 15.0 | |
| April 11, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 3.0 μg/m3 (13) | 15.0 | |
| April 11, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 17.0 ppb (16) | N/A | N/A | 2.5 μg/m3 (11) | 16.0 | |
| April 10, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 17.0 ppb (16) | N/A | N/A | 2.9 μg/m3 (13) | 16.0 | |
| April 10, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 2.9 μg/m3 (13) | 15.0 | |
| April 10, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 3.2 μg/m3 (14) | 15.0 | |
| April 10, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 4.1 μg/m3 (18) | 18.0 | |
| April 10, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 4.4 μg/m3 (19) | 19.0 | |
| April 10, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 4.3 μg/m3 (18) | 18.0 | |
| April 10, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 3.4 μg/m3 (15) | 15.0 | |
| April 10, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| April 10, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 3.0 μg/m3 (13) | 14.0 | |
| April 10, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 18.0 ppb (17) | N/A | N/A | 2.9 μg/m3 (13) | 17.0 | |
| April 10, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (19) | N/A | N/A | 3.7 μg/m3 (16) | 19.0 | |
| April 10, 2021, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (21) | N/A | N/A | 4.4 μg/m3 (19) | 21.0 | |
| April 10, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | N/A | 4.5 μg/m3 (19) | 25.0 | |
| April 10, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (25) | N/A | N/A | 4.7 μg/m3 (20) | 25.0 | |
| April 10, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (27) | N/A | N/A | 4.4 μg/m3 (19) | 27.0 | |
| April 10, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (27) | N/A | N/A | 4.2 μg/m3 (18) | 27.0 | |
| April 10, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 4.2 μg/m3 (18) | 20.0 | |
| April 10, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (21) | N/A | N/A | 4.4 μg/m3 (19) | 21.0 | |
| April 10, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.2 μg/m3 (14) | 14.0 | |
| April 10, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (23) | N/A | N/A | 2.1 μg/m3 (9) | 23.0 | |
| April 10, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (21) | N/A | N/A | 2.2 μg/m3 (10) | 21.0 | |
| April 10, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 21.0 ppb (20) | N/A | N/A | 2.7 μg/m3 (12) | 20.0 | |
| April 10, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| April 10, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 3.7 μg/m3 (16) | 16.0 | |
| April 9, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 3.8 μg/m3 (16) | 16.0 | |
| April 9, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| April 9, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 17.0 ppb (16) | N/A | N/A | 3.5 μg/m3 (15) | 16.0 | |
| April 9, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 3.7 μg/m3 (16) | 16.0 | |
| April 9, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 4.1 μg/m3 (18) | 18.0 | |
| April 9, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 13.0 ppb (13) | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 4.3 μg/m3 (18) | 18.0 | |
| April 9, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 13.0 ppb (13) | N/A | N/A | 4.2 μg/m3 (18) | 18.0 | |
| April 9, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 12.0 ppb (12) | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| April 9, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 12.0 ppb (12) | N/A | N/A | 3.6 μg/m3 (16) | 16.0 | |
| April 9, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 13.0 ppb (13) | N/A | N/A | 3.6 μg/m3 (16) | 16.0 | |
| April 9, 2021, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 13.0 ppb (13) | N/A | N/A | 3.8 μg/m3 (16) | 16.0 | |
| April 9, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 3.4 μg/m3 (15) | 15.0 | |
| April 9, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (13) | N/A | N/A | 2.3 μg/m3 (10) | 13.0 | |
| April 9, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 13.0 ppb (13) | N/A | N/A | 1.9 μg/m3 (8) | 13.0 | |
| April 9, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 13.0 ppb (13) | N/A | N/A | 2.0 μg/m3 (9) | 13.0 | |
| April 9, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 2.4 μg/m3 (10) | 13.0 | |
| April 9, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 4.7 μg/m3 (20) | 20.0 | |
| April 9, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| April 9, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 16.0 ppb (15) | N/A | N/A | 6.5 μg/m3 (28) | 28.0 | |
| April 9, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 14.0 ppb (13) | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 9, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 18.0 ppb (17) | N/A | N/A | 4.6 μg/m3 (20) | 20.0 | |
| April 9, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 16.0 ppb (15) | N/A | N/A | 5.1 μg/m3 (22) | 22.0 | |
| April 9, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 19.0 ppb (18) | N/A | N/A | 4.4 μg/m3 (19) | 19.0 | |
| April 8, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (19) | N/A | N/A | 4.8 μg/m3 (20) | 20.0 | |
| April 8, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 21.0 ppb (20) | N/A | N/A | 5.1 μg/m3 (22) | 22.0 | |
| April 8, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | N/A | 5.1 μg/m3 (22) | 25.0 | |
| April 8, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | N/A | 5.6 μg/m3 (24) | 25.0 | |
| April 8, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 21.0 ppb (20) | N/A | N/A | 6.9 μg/m3 (29) | 29.0 | |
| April 8, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (21) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 8, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 21.0 ppb (20) | N/A | N/A | 7.8 μg/m3 (33) | 33.0 | |
| April 8, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 23.0 ppb (22) | N/A | N/A | 7.3 μg/m3 (31) | 31.0 | |
| April 8, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 22.0 ppb (21) | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 8, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (21) | N/A | N/A | 4.9 μg/m3 (21) | 21.0 | |
| April 8, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (19) | N/A | N/A | 4.1 μg/m3 (18) | 19.0 | |
| April 8, 2021, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 5.6 μg/m3 (24) | 24.0 | |
| April 8, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 8, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 15.0 ppb (14) | N/A | N/A | 2.8 μg/m3 (12) | 14.0 | |
| April 8, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 19.0 ppb (18) | N/A | N/A | 2.8 μg/m3 (12) | 18.0 | |
| April 8, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (32) | N/A | N/A | 6.6 μg/m3 (28) | 32.0 | |
| April 8, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 5.7 μg/m3 (24) | 33.0 | |
| April 8, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 32.0 ppb (30) | N/A | N/A | 6.1 μg/m3 (26) | 30.0 | |
| April 8, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.7 μg/m3 (20) | 20.0 | |
| April 8, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (29) | N/A | N/A | 3.2 μg/m3 (14) | 29.0 | |
| April 8, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (26) | N/A | N/A | 4.4 μg/m3 (19) | 26.0 | |
| April 8, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (30) | N/A | N/A | 3.9 μg/m3 (17) | 30.0 | |
| April 8, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 33.0 ppb (31) | N/A | N/A | 8.1 μg/m3 (34) | 34.0 | |
| April 8, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 7.5 μg/m3 (32) | 33.0 | |
| April 7, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 6.0 μg/m3 (25) | 36.0 | |
| April 7, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (39) | N/A | N/A | 6.6 μg/m3 (28) | 39.0 | |
| April 7, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 47.0 ppb (44) | N/A | N/A | 6.0 μg/m3 (25) | 44.0 | |
| April 7, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 47.0 ppb (44) | N/A | N/A | 6.0 μg/m3 (25) | 44.0 | |
| April 7, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 45.0 ppb (42) | N/A | N/A | 7.9 μg/m3 (33) | 42.0 | |
| April 7, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 7.6 μg/m3 (32) | 40.0 | |
| April 7, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 8.5 μg/m3 (36) | 37.0 | |
| April 7, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 12.3 μg/m3 (52) | 52.0 | |
| April 7, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 20.0 ppb (19) | N/A | N/A | 13.4 μg/m3 (54) | 54.0 | |
| April 7, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (21) | N/A | N/A | 14.0 μg/m3 (55) | 55.0 | |
| April 7, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (23) | N/A | N/A | 13.8 μg/m3 (55) | 55.0 | |
| April 7, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | 14.8 μg/m3 (57) | 57.0 | |
| April 7, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 23.0 ppb (22) | N/A | N/A | 16.6 μg/m3 (61) | 61.0 | |
| April 7, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (25) | N/A | N/A | 15.7 μg/m3 (59) | 59.0 | |
| April 7, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (27) | N/A | N/A | 15.1 μg/m3 (58) | 58.0 | |
| April 7, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (28) | N/A | N/A | 14.6 μg/m3 (57) | 57.0 | |
| April 7, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 15.5 μg/m3 (59) | 59.0 | |
| April 7, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | N/A | 16.8 μg/m3 (61) | 61.0 | |
| April 7, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 18.4 μg/m3 (65) | 65.0 | |
| April 7, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (24) | N/A | N/A | 20.6 μg/m3 (69) | 69.0 | |
| April 7, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (23) | N/A | N/A | 21.0 μg/m3 (70) | 70.0 | |
| April 7, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 19.8 μg/m3 (68) | 68.0 | |
| April 7, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 30.0 ppb (28) | N/A | N/A | 17.8 μg/m3 (63) | 63.0 | |
| April 7, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (34) | N/A | N/A | 17.2 μg/m3 (62) | 62.0 | |
| April 6, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 41.0 ppb (38) | N/A | N/A | 16.6 μg/m3 (61) | 61.0 | |
| April 6, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 12.9 μg/m3 (53) | 53.0 | |
| April 6, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 6, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (39) | N/A | N/A | 12.9 μg/m3 (53) | 53.0 | |
| April 6, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (40) | N/A | N/A | 12.3 μg/m3 (52) | 52.0 | |
| April 6, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (40) | N/A | N/A | 16.1 μg/m3 (60) | 60.0 | |
| April 6, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (37) | N/A | N/A | 13.6 μg/m3 (55) | 55.0 | |
| April 6, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (35) | N/A | N/A | 15.2 μg/m3 (58) | 58.0 | |
| April 6, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (32) | N/A | N/A | 13.9 μg/m3 (55) | 55.0 | |
| April 6, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.3 μg/m3 (58) | 58.0 | |
| April 6, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | 14.8 μg/m3 (57) | 57.0 | |
| April 6, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | 13.4 μg/m3 (54) | 54.0 | |
| April 6, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 19.0 ppb (18) | N/A | N/A | 11.9 μg/m3 (50) | 50.0 | |
| April 6, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (22) | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| April 6, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (25) | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| April 6, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (26) | N/A | N/A | 10.4 μg/m3 (44) | 44.0 | |
| April 6, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 6, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | N/A | 16.6 μg/m3 (61) | 61.0 | |
| April 6, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 20.5 μg/m3 (69) | 69.0 | |
| April 6, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 28.0 ppb (26) | N/A | N/A | 18.5 μg/m3 (65) | 65.0 | |
| April 6, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 30.0 ppb (28) | N/A | N/A | 15.8 μg/m3 (59) | 59.0 | |
| April 6, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 33.0 ppb (31) | N/A | N/A | 13.6 μg/m3 (55) | 55.0 | |
| April 6, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 38.0 ppb (36) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| April 6, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 5, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 5, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 43.0 ppb (40) | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| April 5, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 45.0 ppb (42) | N/A | N/A | 11.4 μg/m3 (48) | 48.0 | |
| April 5, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 45.0 ppb (42) | N/A | N/A | 12.5 μg/m3 (52) | 52.0 | |
| April 5, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 47.0 ppb (44) | N/A | N/A | 18.0 μg/m3 (64) | 64.0 | |
| April 5, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 51.0 ppb (48) | N/A | N/A | 46.4 μg/m3 (128) | 128.0 | |
| April 5, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 44.0 ppb (41) | N/A | N/A | N/A | 41.0 | |
| April 5, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 30.0 ppb (28) | N/A | N/A | 15.7 μg/m3 (59) | 59.0 | |
| April 5, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | 14.7 μg/m3 (57) | 57.0 | |
| April 5, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 20.0 ppb (19) | N/A | N/A | 15.7 μg/m3 (59) | 59.0 | |
| April 5, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | 15.6 μg/m3 (59) | 59.0 | |
| April 5, 2021, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (23) | N/A | N/A | 14.9 μg/m3 (57) | 57.0 | |
| April 5, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (26) | N/A | N/A | 14.1 μg/m3 (56) | 56.0 | |
| April 5, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (29) | N/A | N/A | 14.2 μg/m3 (56) | 56.0 | |
| April 5, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (32) | N/A | N/A | 13.5 μg/m3 (54) | 54.0 | |
| April 5, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (33) | N/A | N/A | 12.8 μg/m3 (53) | 53.0 | |
| April 5, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 12.4 μg/m3 (52) | 52.0 | |
| April 5, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (35) | N/A | N/A | 12.3 μg/m3 (52) | 52.0 | |
| April 5, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.6 μg/m3 (53) | 53.0 | |
| April 5, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (38) | N/A | N/A | 14.2 μg/m3 (56) | 56.0 | |
| April 5, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (36) | N/A | N/A | 18.7 μg/m3 (65) | 65.0 | |
| April 5, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 42.0 ppb (39) | N/A | N/A | 22.0 μg/m3 (72) | 72.0 | |
| April 5, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 18.1 μg/m3 (64) | 64.0 | |
| April 5, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (46) | N/A | N/A | 16.4 μg/m3 (61) | 61.0 | |
| April 4, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 55.0 ppb (51) | N/A | N/A | 16.2 μg/m3 (60) | 60.0 | |
| April 4, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 62.0 ppb (74) | N/A | N/A | 19.9 μg/m3 (68) | 74.0 | |
| April 4, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 68.0 ppb (94) | N/A | N/A | 26.2 μg/m3 (81) | 94.0 | |
| April 4, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 68.0 ppb (94) | N/A | N/A | 25.3 μg/m3 (79) | 94.0 | |
| April 4, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 68.0 ppb (94) | N/A | N/A | 27.6 μg/m3 (84) | 94.0 | |
| April 4, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 66.0 ppb (87) | N/A | N/A | 31.6 μg/m3 (93) | 93.0 | |
| April 4, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 62.0 ppb (74) | N/A | N/A | 26.1 μg/m3 (81) | 81.0 | |
| April 4, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 59.0 ppb (65) | N/A | N/A | 30.6 μg/m3 (90) | 90.0 | |
| April 4, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 42.0 μg/m3 (118) | 118.0 | |
| April 4, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 47.3 μg/m3 (131) | 131.0 | |
| April 4, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (15) | N/A | N/A | 60.1 μg/m3 (154) | 154.0 | |
| April 4, 2021, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 3.0 ppb (3) | N/A | N/A | 62.0 μg/m3 (155) | 155.0 | |
| April 4, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 1.0 ppb (1) | N/A | N/A | 59.2 μg/m3 (153) | 153.0 | |
| April 4, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 2.0 ppb (2) | N/A | N/A | 58.6 μg/m3 (153) | 153.0 | |
| April 4, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 2.0 ppb (2) | N/A | N/A | 59.5 μg/m3 (154) | 154.0 | |
| April 4, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 4.0 ppb (4) | N/A | N/A | 67.5 μg/m3 (158) | 158.0 | |
| April 4, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 74.9 μg/m3 (162) | 162.0 | |
| April 4, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 4.0 ppb (4) | N/A | N/A | 83.9 μg/m3 (166) | 166.0 | |
| April 4, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 94.9 μg/m3 (172) | 172.0 | |
| April 4, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 4.0 ppb (4) | N/A | N/A | 121.8 μg/m3 (186) | 186.0 | |
| April 4, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 6.0 ppb (6) | N/A | N/A | 119.6 μg/m3 (185) | 185.0 |