Saint Louis (Near N Rivfront) MO, US: 38.65643, -90.18977
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 7, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 44.8 μg/m3 (42) | 15.4 μg/m3 (58) | 58.0 | |
| March 7, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.5 μg/m3 (30) | 14.4 μg/m3 (56) | 56.0 | |
| March 7, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.8 μg/m3 (30) | 13.2 μg/m3 (54) | 54.0 | |
| March 7, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.3 μg/m3 (20) | 14.4 μg/m3 (56) | 56.0 | |
| March 7, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.2 μg/m3 (23) | 9.7 μg/m3 (41) | 41.0 | |
| March 6, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 μg/m3 (53) | 3.1 μg/m3 (13) | 53.0 | |
| March 6, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.6 μg/m3 (23) | 6.4 μg/m3 (27) | 27.0 | |
| March 6, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.5 μg/m3 (22) | 6.1 μg/m3 (26) | 26.0 | |
| March 6, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.4 μg/m3 (16) | 11.1 μg/m3 (47) | 47.0 | |
| March 6, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.7 μg/m3 (16) | 3.8 μg/m3 (16) | 16.0 | |
| March 6, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.9 μg/m3 (14) | 6.8 μg/m3 (29) | 29.0 | |
| March 6, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.7 μg/m3 (22) | 5.6 μg/m3 (24) | 24.0 | |
| March 6, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.5 μg/m3 (23) | 9.5 μg/m3 (40) | 40.0 | |
| March 6, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 38.8 μg/m3 (36) | 14.4 μg/m3 (56) | 56.0 | |
| March 6, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 99.4 μg/m3 (73) | 25.1 μg/m3 (79) | 79.0 | |
| March 6, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 67.1 μg/m3 (57) | 21.4 μg/m3 (71) | 71.0 | |
| March 6, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 84.3 μg/m3 (66) | 24.4 μg/m3 (77) | 77.0 | |
| March 6, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 66.5 μg/m3 (57) | 20.1 μg/m3 (68) | 68.0 | |
| March 6, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 71.2 μg/m3 (60) | 16.0 μg/m3 (60) | 60.0 | |
| March 6, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 114.2 μg/m3 (81) | 19.1 μg/m3 (66) | 81.0 | |
| March 6, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 46.4 μg/m3 (43) | 18.7 μg/m3 (65) | 65.0 | |
| March 6, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 μg/m3 (34) | 20.3 μg/m3 (69) | 69.0 | |
| March 6, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 μg/m3 (50) | 18.1 μg/m3 (64) | 64.0 | |
| March 6, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 50.5 μg/m3 (47) | 11.6 μg/m3 (49) | 49.0 | |
| March 6, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 66.5 μg/m3 (57) | 13.1 μg/m3 (54) | 57.0 | |
| March 6, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 μg/m3 (55) | 6.4 μg/m3 (27) | 55.0 | |
| March 6, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 106.1 μg/m3 (77) | 9.7 μg/m3 (41) | 77.0 | |
| March 6, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 95.1 μg/m3 (71) | 8.7 μg/m3 (37) | 71.0 | |
| March 6, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.7 μg/m3 (30) | 7.7 μg/m3 (33) | 33.0 | |
| March 5, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.9 μg/m3 (15) | 5.6 μg/m3 (24) | 24.0 | |
| March 5, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.1 μg/m3 (23) | 9.1 μg/m3 (38) | 38.0 | |
| March 5, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.3 μg/m3 (22) | 6.1 μg/m3 (26) | 26.0 | |
| March 5, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 48.8 μg/m3 (46) | 6.1 μg/m3 (26) | 46.0 | |
| March 5, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.2 μg/m3 (23) | 1.8 μg/m3 (8) | 23.0 | |
| March 5, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 29.7 μg/m3 (28) | 7.3 μg/m3 (31) | 31.0 | |
| March 5, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 63.9 μg/m3 (56) | 13.1 μg/m3 (54) | 56.0 | |
| March 5, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.9 μg/m3 (31) | 8.4 μg/m3 (36) | 36.0 | |
| March 5, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 μg/m3 (28) | 8.8 μg/m3 (37) | 37.0 | |
| March 5, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 μg/m3 (33) | 6.7 μg/m3 (28) | 33.0 | |
| March 5, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 33.9 μg/m3 (32) | 8.6 μg/m3 (36) | 36.0 | |
| March 5, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 μg/m3 (31) | 2.6 μg/m3 (11) | 31.0 | |
| March 5, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.8 μg/m3 (17) | 5.4 μg/m3 (23) | 23.0 | |
| March 5, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.5 μg/m3 (13) | 7.3 μg/m3 (31) | 31.0 | |
| March 5, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.1 μg/m3 (13) | 6.5 μg/m3 (28) | 28.0 | |
| March 5, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.4 μg/m3 (12) | 2.0 μg/m3 (9) | 12.0 | |
| March 5, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.9 μg/m3 (14) | 7.0 μg/m3 (30) | 30.0 | |
| March 5, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.9 μg/m3 (14) | 6.0 μg/m3 (25) | 25.0 | |
| March 5, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.9 μg/m3 (19) | 6.4 μg/m3 (27) | 27.0 | |
| March 5, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.3 μg/m3 (18) | 5.6 μg/m3 (24) | 24.0 | |
| March 5, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (15) | 5.3 μg/m3 (23) | 23.0 | |
| March 5, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 22.6 μg/m3 (21) | 10.3 μg/m3 (43) | 43.0 | |
| March 5, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.5 μg/m3 (20) | 13.2 μg/m3 (54) | 54.0 | |
| March 5, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.6 μg/m3 (19) | 4.2 μg/m3 (18) | 19.0 | |
| March 4, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.1 μg/m3 (16) | 7.9 μg/m3 (33) | 33.0 | |
| March 4, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 μg/m3 (25) | 8.1 μg/m3 (34) | 34.0 | |
| March 4, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 25.3 μg/m3 (24) | 11.1 μg/m3 (47) | 47.0 | |
| March 4, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 μg/m3 (38) | 10.6 μg/m3 (45) | 45.0 | |
| March 4, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 μg/m3 (44) | 8.0 μg/m3 (34) | 44.0 | |
| March 4, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 35.6 μg/m3 (33) | 9.0 μg/m3 (38) | 38.0 | |
| March 4, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 51.5 μg/m3 (48) | 10.3 μg/m3 (43) | 48.0 | |
| March 4, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 81.3 μg/m3 (65) | 11.0 μg/m3 (46) | 65.0 | |
| March 4, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 112.1 μg/m3 (80) | 20.4 μg/m3 (69) | 80.0 | |
| March 4, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 μg/m3 (54) | 17.1 μg/m3 (62) | 62.0 | |
| March 4, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 81.2 μg/m3 (64) | 19.6 μg/m3 (67) | 67.0 | |
| March 4, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 75.9 μg/m3 (62) | 16.6 μg/m3 (61) | 62.0 | |
| March 4, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.7 μg/m3 (31) | 14.9 μg/m3 (57) | 57.0 | |
| March 4, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 34.4 μg/m3 (32) | 15.8 μg/m3 (59) | 59.0 | |
| March 4, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.8 μg/m3 (31) | 14.3 μg/m3 (56) | 56.0 | |
| March 4, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 45.4 μg/m3 (43) | 17.5 μg/m3 (63) | 63.0 | |
| March 4, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 49.2 μg/m3 (46) | 14.2 μg/m3 (56) | 56.0 | |
| March 4, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 74.4 μg/m3 (61) | 16.7 μg/m3 (61) | 61.0 | |
| March 4, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 77.3 μg/m3 (63) | 14.9 μg/m3 (57) | 63.0 | |
| March 4, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 87.8 μg/m3 (68) | 13.5 μg/m3 (54) | 68.0 | |
| March 4, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 79.4 μg/m3 (64) | 17.6 μg/m3 (63) | 64.0 | |
| March 4, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 60.7 μg/m3 (54) | 11.2 μg/m3 (47) | 54.0 | |
| March 4, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 66.1 μg/m3 (57) | 12.4 μg/m3 (52) | 57.0 | |
| March 4, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 91.3 μg/m3 (69) | 6.6 μg/m3 (28) | 69.0 | |
| March 3, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 48.8 μg/m3 (46) | 14.3 μg/m3 (56) | 56.0 | |
| March 3, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.2 μg/m3 (30) | 9.4 μg/m3 (40) | 40.0 | |
| March 3, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.2 μg/m3 (22) | 11.4 μg/m3 (48) | 48.0 | |
| March 3, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 μg/m3 (50) | 10.2 μg/m3 (43) | 50.0 | |
| March 3, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 40.9 μg/m3 (38) | 11.2 μg/m3 (47) | 47.0 | |
| March 3, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.4 μg/m3 (25) | 3.8 μg/m3 (16) | 25.0 | |
| March 3, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.3 μg/m3 (22) | 4.1 μg/m3 (18) | 22.0 | |
| March 3, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 28.6 μg/m3 (27) | 5.8 μg/m3 (25) | 27.0 | |
| March 3, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 36.1 μg/m3 (34) | 8.0 μg/m3 (34) | 34.0 | |
| March 3, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 29.3 μg/m3 (28) | 10.6 μg/m3 (45) | 45.0 | |
| March 3, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 69.2 μg/m3 (59) | 9.4 μg/m3 (40) | 59.0 | |
| March 3, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 40.5 μg/m3 (38) | 11.1 μg/m3 (47) | 47.0 | |
| March 3, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.7 μg/m3 (23) | 6.0 μg/m3 (25) | 25.0 | |
| March 3, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (13) | 5.1 μg/m3 (22) | 22.0 | |
| March 3, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.7 μg/m3 (10) | 4.4 μg/m3 (19) | 19.0 | |
| March 3, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.3 μg/m3 (11) | 5.9 μg/m3 (25) | 25.0 | |
| March 3, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.1 μg/m3 (11) | 7.2 μg/m3 (31) | 31.0 | |
| March 3, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.4 μg/m3 (11) | 6.5 μg/m3 (28) | 28.0 | |
| March 3, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.3 μg/m3 (15) | 4.6 μg/m3 (20) | 20.0 | |
| March 3, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.7 μg/m3 (18) | 5.8 μg/m3 (25) | 25.0 | |
| March 3, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 22.1 μg/m3 (21) | 6.2 μg/m3 (26) | 26.0 | |
| March 3, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 27.6 μg/m3 (26) | 10.5 μg/m3 (44) | 44.0 | |
| March 3, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 29.2 μg/m3 (28) | 7.5 μg/m3 (32) | 32.0 | |
| March 3, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 33.4 μg/m3 (31) | 8.7 μg/m3 (37) | 37.0 | |
| March 2, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 55.1 μg/m3 (52) | 2.5 μg/m3 (11) | 52.0 | |
| March 2, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 μg/m3 (30) | 9.4 μg/m3 (40) | 40.0 | |
| March 2, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 53.1 μg/m3 (50) | 8.7 μg/m3 (37) | 50.0 | |
| March 2, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 59.6 μg/m3 (54) | 0.0 μg/m3 (0) | 54.0 | |
| March 2, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 51.5 μg/m3 (48) | N/A | 48.0 | |
| March 2, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| March 2, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| March 2, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 51.8 μg/m3 (48) | 5.4 μg/m3 (23) | 48.0 | |
| March 2, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 66.5 μg/m3 (57) | 8.3 μg/m3 (35) | 57.0 | |
| March 2, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 μg/m3 (53) | 10.1 μg/m3 (43) | 53.0 | |
| March 2, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 μg/m3 (45) | 13.8 μg/m3 (55) | 55.0 | |
| March 2, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.1 μg/m3 (25) | 8.5 μg/m3 (36) | 36.0 | |
| March 2, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.5 μg/m3 (18) | 7.5 μg/m3 (32) | 32.0 | |
| March 2, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.4 μg/m3 (13) | 4.8 μg/m3 (20) | 20.0 | |
| March 2, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.2 μg/m3 (12) | 7.2 μg/m3 (31) | 31.0 | |
| March 2, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.6 μg/m3 (12) | 8.5 μg/m3 (36) | 36.0 | |
| March 2, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.9 μg/m3 (12) | 6.8 μg/m3 (29) | 29.0 | |
| March 2, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.8 μg/m3 (13) | 5.1 μg/m3 (22) | 22.0 | |
| March 2, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.4 μg/m3 (18) | 5.5 μg/m3 (23) | 23.0 | |
| March 2, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.6 μg/m3 (23) | 9.8 μg/m3 (41) | 41.0 | |
| March 2, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.7 μg/m3 (14) | 8.8 μg/m3 (37) | 37.0 | |
| March 2, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (15) | 5.5 μg/m3 (23) | 23.0 | |
| March 2, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.9 μg/m3 (16) | 0.9 μg/m3 (4) | 16.0 | |
| March 2, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.3 μg/m3 (23) | 6.6 μg/m3 (28) | 28.0 | |
| March 1, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.4 μg/m3 (18) | 3.3 μg/m3 (14) | 18.0 | |
| March 1, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.5 μg/m3 (22) | 8.8 μg/m3 (37) | 37.0 | |
| March 1, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.5 μg/m3 (29) | 4.5 μg/m3 (19) | 29.0 | |
| March 1, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.3 μg/m3 (29) | 6.9 μg/m3 (29) | 29.0 | |
| March 1, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.7 μg/m3 (30) | 2.1 μg/m3 (9) | 30.0 | |
| March 1, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.5 μg/m3 (25) | 6.1 μg/m3 (26) | 26.0 | |
| March 1, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.1 μg/m3 (14) | 6.9 μg/m3 (29) | 29.0 | |
| March 1, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.9 μg/m3 (25) | 4.0 μg/m3 (17) | 25.0 | |
| March 1, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 22.2 μg/m3 (21) | 1.6 μg/m3 (7) | 21.0 | |
| March 1, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 29.7 μg/m3 (28) | 9.7 μg/m3 (41) | 41.0 | |
| March 1, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.5 μg/m3 (17) | 3.6 μg/m3 (16) | 17.0 | |
| March 1, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.6 μg/m3 (16) | 6.6 μg/m3 (28) | 28.0 | |
| March 1, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.3 μg/m3 (13) | 6.8 μg/m3 (29) | 29.0 | |
| March 1, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.3 μg/m3 (11) | 7.0 μg/m3 (30) | 30.0 | |
| March 1, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.4 μg/m3 (10) | 1.8 μg/m3 (8) | 10.0 | |
| March 1, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.5 μg/m3 (10) | 4.9 μg/m3 (21) | 21.0 | |
| March 1, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.7 μg/m3 (10) | 2.2 μg/m3 (10) | 10.0 | |
| March 1, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.1 μg/m3 (11) | 4.3 μg/m3 (18) | 18.0 | |
| March 1, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.2 μg/m3 (10) | 1.2 μg/m3 (5) | 10.0 | |
| March 1, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.6 μg/m3 (9) | 5.7 μg/m3 (24) | 24.0 | |
| March 1, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.9 μg/m3 (10) | 3.4 μg/m3 (15) | 15.0 | |
| March 1, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.3 μg/m3 (12) | 7.9 μg/m3 (33) | 33.0 | |
| March 1, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (12) | 3.9 μg/m3 (17) | 17.0 | |
| March 1, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (12) | -1.2 μg/m3 (0) | 12.0 | |
| Feb. 28, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.2 μg/m3 (14) | 7.7 μg/m3 (33) | 33.0 | |
| Feb. 28, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.2 μg/m3 (19) | 11.7 μg/m3 (49) | 49.0 | |
| Feb. 28, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.3 μg/m3 (18) | 10.8 μg/m3 (46) | 46.0 | |
| Feb. 28, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.3 μg/m3 (17) | 1.6 μg/m3 (7) | 17.0 | |
| Feb. 28, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.2 μg/m3 (15) | 3.3 μg/m3 (14) | 15.0 | |
| Feb. 28, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.5 μg/m3 (13) | 1.8 μg/m3 (8) | 13.0 | |
| Feb. 28, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.3 μg/m3 (15) | 8.6 μg/m3 (36) | 36.0 | |
| Feb. 28, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.9 μg/m3 (13) | 7.5 μg/m3 (32) | 32.0 | |
| Feb. 28, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.3 μg/m3 (14) | 7.0 μg/m3 (30) | 30.0 | |
| Feb. 28, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.5 μg/m3 (14) | 10.6 μg/m3 (45) | 45.0 | |
| Feb. 28, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.5 μg/m3 (8) | 1.4 μg/m3 (6) | 8.0 | |
| Feb. 28, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.9 μg/m3 (8) | 4.1 μg/m3 (18) | 18.0 | |
| Feb. 28, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.6 μg/m3 (10) | 3.9 μg/m3 (17) | 17.0 | |
| Feb. 28, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.4 μg/m3 (10) | 0.5 μg/m3 (3) | 10.0 | |
| Feb. 28, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.1 μg/m3 (7) | 0.8 μg/m3 (4) | 7.0 | |
| Feb. 28, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.5 μg/m3 (6) | 6.6 μg/m3 (28) | 28.0 | |
| Feb. 28, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.6 μg/m3 (8) | 3.4 μg/m3 (15) | 15.0 | |
| Feb. 28, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.5 μg/m3 (11) | 0.2 μg/m3 (1) | 11.0 | |
| Feb. 28, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.6 μg/m3 (16) | 5.7 μg/m3 (24) | 24.0 |