Port Huron (Dove St) MI, US: 42.9533, -82.4564
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 1, 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 | 3.8 μg/m3 (16) | 40.0 | |
| April 1, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 3.9 μg/m3 (17) | 40.0 | |
| April 1, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 3.4 μg/m3 (15) | 40.0 | |
| April 1, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 3.1 μg/m3 (13) | 39.0 | |
| April 1, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 3.2 μg/m3 (14) | 40.0 | |
| April 1, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 3.0 μg/m3 (13) | 38.0 | |
| April 1, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 3.2 μg/m3 (14) | 36.0 | |
| April 1, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 3.6 μg/m3 (16) | 34.0 | |
| April 1, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 3.7 μg/m3 (16) | 32.0 | |
| April 1, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 3.3 μg/m3 (14) | 34.0 | |
| April 1, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 1, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 2.8 μg/m3 (12) | 34.0 | |
| April 1, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 2.8 μg/m3 (12) | 32.0 | |
| April 1, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 2.8 μg/m3 (12) | 31.0 | |
| April 1, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 2.7 μg/m3 (12) | 32.0 | |
| April 1, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 3.0 μg/m3 (13) | 32.0 | |
| April 1, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 3.7 μg/m3 (16) | 32.0 | |
| April 1, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.8 μg/m3 (16) | 32.0 | |
| April 1, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | 3.7 μg/m3 (16) | 16.0 | |
| April 1, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | N/A | 34.0 | |
| April 1, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | N/A | 34.0 | |
| April 1, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 4.7 μg/m3 (20) | 34.0 | |
| April 1, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 4.8 μg/m3 (20) | 33.0 | |
| April 1, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 5.7 μg/m3 (24) | 32.0 | |
| March 31, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 6.4 μg/m3 (27) | 34.0 | |
| March 31, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 7.2 μg/m3 (31) | 35.0 | |
| March 31, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 7.8 μg/m3 (33) | 36.0 | |
| March 31, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 7.6 μg/m3 (32) | 38.0 | |
| March 31, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 7.3 μg/m3 (31) | 38.0 | |
| March 31, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 6.9 μg/m3 (29) | 38.0 | |
| March 31, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 6.3 μg/m3 (27) | 36.0 | |
| March 31, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 6.5 μg/m3 (28) | 34.0 | |
| March 31, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 6.3 μg/m3 (27) | 33.0 | |
| March 31, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 6.5 μg/m3 (28) | 31.0 | |
| March 31, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 5.7 μg/m3 (24) | 33.0 | |
| March 31, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 4.9 μg/m3 (21) | 35.0 | |
| March 31, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| March 31, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 4.7 μg/m3 (20) | 39.0 | |
| March 31, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 5.8 μg/m3 (25) | 41.0 | |
| March 31, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 8.3 μg/m3 (35) | 38.0 | |
| March 31, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 12.4 μg/m3 (52) | 52.0 | |
| March 31, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 10.2 μg/m3 (43) | 43.0 | |
| March 31, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| March 31, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 47.0 ppb (44) | N/A | N/A | 8.9 μg/m3 (38) | 44.0 | |
| March 31, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 47.0 ppb (44) | N/A | N/A | 7.1 μg/m3 (30) | 44.0 | |
| March 31, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 47.0 ppb (44) | N/A | N/A | 8.4 μg/m3 (36) | 44.0 | |
| March 31, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 47.0 ppb (44) | N/A | N/A | 9.0 μg/m3 (38) | 44.0 | |
| March 31, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 52.0 ppb (49) | N/A | N/A | 8.5 μg/m3 (36) | 49.0 | |
| March 30, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 56.0 ppb (55) | N/A | N/A | 8.4 μg/m3 (36) | 55.0 | |
| March 30, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 57.0 ppb (58) | N/A | N/A | 6.8 μg/m3 (29) | 58.0 | |
| March 30, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 57.0 ppb (58) | N/A | N/A | 6.0 μg/m3 (25) | 58.0 | |
| March 30, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 56.0 ppb (55) | N/A | N/A | 6.6 μg/m3 (28) | 55.0 | |
| March 30, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 52.0 ppb (49) | N/A | N/A | 7.0 μg/m3 (30) | 49.0 | |
| March 30, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 49.0 ppb (46) | N/A | N/A | 7.1 μg/m3 (30) | 46.0 | |
| March 30, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 48.0 ppb (45) | N/A | N/A | 6.9 μg/m3 (29) | 45.0 | |
| March 30, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 46.0 ppb (43) | N/A | N/A | 6.5 μg/m3 (28) | 43.0 | |
| March 30, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 41.0 ppb (38) | N/A | N/A | 6.2 μg/m3 (26) | 38.0 | |
| March 30, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | N/A | N/A | N/A | 6.3 μg/m3 (27) | 27.0 | |
| March 30, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 7.8 μg/m3 (33) | 33.0 | |
| March 30, 2021, noon | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (23) | 25.0 ppb (24) | N/A | N/A | 8.6 μg/m3 (36) | 36.0 | |
| March 30, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (22) | 21.0 ppb (20) | N/A | N/A | 9.1 μg/m3 (38) | 38.0 | |
| March 30, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 29.0 ppb (27) | N/A | N/A | 8.7 μg/m3 (37) | 37.0 | |
| March 30, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 29.0 ppb (27) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 30, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 32.0 ppb (30) | N/A | N/A | 8.7 μg/m3 (37) | 37.0 | |
| March 30, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 31.0 ppb (29) | N/A | N/A | 8.7 μg/m3 (37) | 37.0 | |
| March 30, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| March 30, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (12) | N/A | N/A | N/A | 7.8 μg/m3 (33) | 33.0 | |
| March 30, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (15) | 28.0 ppb (26) | N/A | N/A | 7.5 μg/m3 (32) | 32.0 | |
| March 30, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 35.0 ppb (33) | N/A | N/A | 7.5 μg/m3 (32) | 33.0 | |
| March 30, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 37.0 ppb (35) | N/A | N/A | 7.8 μg/m3 (33) | 35.0 | |
| March 30, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 37.0 ppb (35) | N/A | N/A | 7.6 μg/m3 (32) | 35.0 | |
| March 30, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 38.0 ppb (36) | N/A | N/A | 7.4 μg/m3 (31) | 36.0 | |
| March 29, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (12) | 39.0 ppb (37) | N/A | N/A | 8.4 μg/m3 (36) | 37.0 | |
| March 29, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (20) | 36.0 ppb (34) | N/A | N/A | 8.7 μg/m3 (37) | 37.0 | |
| March 29, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | 37.0 ppb (35) | N/A | N/A | 7.8 μg/m3 (33) | 35.0 | |
| March 29, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 39.0 ppb (37) | N/A | N/A | 6.8 μg/m3 (29) | 37.0 | |
| March 29, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 6.9 μg/m3 (29) | 37.0 | |
| March 29, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 6.8 μg/m3 (29) | 35.0 | |
| March 29, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 4.8 μg/m3 (20) | 37.0 | |
| March 29, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 4.3 μg/m3 (18) | 38.0 | |
| March 29, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 3.8 μg/m3 (16) | 37.0 | |
| March 29, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 3.8 μg/m3 (16) | 36.0 | |
| March 29, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 3.7 μg/m3 (16) | 37.0 | |
| March 29, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 3.7 μg/m3 (16) | 35.0 | |
| March 29, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 3.8 μg/m3 (16) | 34.0 | |
| March 29, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 3.5 μg/m3 (15) | 35.0 | |
| March 29, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 3.3 μg/m3 (14) | 38.0 | |
| March 29, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 3.2 μg/m3 (14) | 36.0 | |
| March 29, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 3.3 μg/m3 (14) | 35.0 | |
| March 29, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.3 μg/m3 (14) | 36.0 | |
| March 29, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | 3.3 μg/m3 (14) | 14.0 | |
| March 29, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 3.0 μg/m3 (13) | 34.0 | |
| March 29, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 2.8 μg/m3 (12) | 33.0 | |
| March 29, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 2.3 μg/m3 (10) | 33.0 | |
| March 29, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 1.3 μg/m3 (6) | 33.0 | |
| March 29, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 1.1 μg/m3 (5) | 34.0 | |
| March 28, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 1.5 μg/m3 (7) | 35.0 | |
| March 28, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 1.8 μg/m3 (8) | 36.0 | |
| March 28, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 1.8 μg/m3 (8) | 34.0 | |
| March 28, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 0.7 μg/m3 (3) | 33.0 | |
| March 28, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 0.7 μg/m3 (3) | 33.0 | |
| March 28, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 2.8 μg/m3 (12) | 30.0 | |
| March 28, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 5.3 μg/m3 (23) | 25.0 | |
| March 28, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 4.3 μg/m3 (18) | 25.0 | |
| March 28, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | 4.7 μg/m3 (20) | 26.0 | |
| March 28, 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 | 3.8 μg/m3 (16) | 30.0 | |
| March 28, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 9.7 μg/m3 (41) | 41.0 | |
| March 28, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| March 28, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| March 28, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | 9.5 μg/m3 (40) | 40.0 | |
| March 28, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 9.7 μg/m3 (41) | 41.0 | |
| March 28, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 9.3 μg/m3 (39) | 39.0 | |
| March 28, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 9.3 μg/m3 (39) | 39.0 | |
| March 28, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 9.4 μg/m3 (40) | 40.0 | |
| March 28, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 8.8 μg/m3 (37) | 37.0 | |
| March 28, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 30.0 ppb (28) | N/A | N/A | 9.2 μg/m3 (39) | 39.0 | |
| March 28, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 19.0 ppb (18) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | 8.3 μg/m3 (35) | 35.0 | |
| March 28, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 25.0 ppb (24) | N/A | N/A | 7.5 μg/m3 (32) | 32.0 | |
| March 28, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| March 27, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| March 27, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 6.5 μg/m3 (28) | 30.0 | |
| March 27, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 5.9 μg/m3 (25) | 33.0 | |
| March 27, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 34.0 ppb (32) | N/A | N/A | 6.4 μg/m3 (27) | 32.0 | |
| March 27, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 32.0 ppb (30) | N/A | N/A | 7.2 μg/m3 (31) | 31.0 | |
| March 27, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 32.0 ppb (30) | N/A | N/A | 8.1 μg/m3 (34) | 34.0 | |
| March 27, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 30.0 ppb (28) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 27, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| March 27, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 6.2 μg/m3 (26) | 29.0 | |
| March 27, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 5.3 μg/m3 (23) | 29.0 | |
| March 27, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | 6.3 μg/m3 (27) | 27.0 | |
| March 27, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 22.0 ppb (21) | N/A | N/A | 7.5 μg/m3 (32) | 32.0 | |
| March 27, 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 | 7.6 μg/m3 (32) | 32.0 | |
| March 27, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | 6.9 μg/m3 (29) | 29.0 | |
| March 27, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 23.0 ppb (22) | N/A | N/A | 5.8 μg/m3 (25) | 25.0 | |
| March 27, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 15.0 ppb (14) | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| March 27, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 6.0 ppb (6) | N/A | N/A | 7.7 μg/m3 (33) | 33.0 | |
| March 27, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| March 27, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | 6.9 μg/m3 (29) | 29.0 | |
| March 27, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 9.0 ppb (9) | N/A | N/A | 6.8 μg/m3 (29) | 29.0 | |
| March 27, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 8.0 ppb (8) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| March 27, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 6.0 ppb (6) | N/A | N/A | 10.2 μg/m3 (43) | 43.0 | |
| March 27, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 3.0 ppb (3) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 27, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 4.0 ppb (4) | N/A | N/A | 8.7 μg/m3 (37) | 37.0 | |
| March 26, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 17.0 ppb (16) | N/A | N/A | 6.8 μg/m3 (29) | 29.0 | |
| March 26, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 20.0 ppb (19) | N/A | N/A | 6.5 μg/m3 (28) | 28.0 | |
| March 26, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 5.0 μg/m3 (21) | 25.0 | |
| March 26, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | 5.1 μg/m3 (22) | 23.0 | |
| March 26, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 21.0 ppb (20) | N/A | N/A | N/A | 20.0 | |
| March 26, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 21.0 ppb (20) | N/A | N/A | N/A | 20.0 | |
| March 26, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 20.0 ppb (19) | N/A | N/A | N/A | 19.0 | |
| March 26, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 22.0 ppb (21) | N/A | N/A | N/A | 21.0 | |
| March 26, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 23.0 ppb (22) | N/A | N/A | N/A | 22.0 | |
| March 26, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 23.0 ppb (22) | N/A | N/A | N/A | 22.0 | |
| March 26, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 23.0 ppb (22) | N/A | N/A | N/A | 22.0 | |
| March 26, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | N/A | 23.0 | |
| March 26, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | N/A | 26.0 | |
| March 26, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | N/A | 26.0 | |
| March 26, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | N/A | 26.0 | |
| March 26, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 25.0 ppb (24) | N/A | N/A | N/A | 24.0 | |
| March 26, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 24.0 ppb (23) | N/A | N/A | N/A | 23.0 | |
| March 26, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | N/A | N/A | 23.0 | |
| March 26, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 2.0 | |
| March 26, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | N/A | 25.0 | |
| March 26, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | N/A | 25.0 | |
| March 26, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | N/A | 25.0 | |
| March 26, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | N/A | 28.0 | |
| March 26, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | N/A | 30.0 |