Cambridge (Horns Point Rd) MD, US: 38.5876, -76.1408
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 13, 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 | 6.0 μg/m3 (25) | 33.0 | |
| April 13, 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 | 6.0 μg/m3 (25) | 33.0 | |
| April 13, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| April 13, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| April 12, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| April 12, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 12, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| April 12, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| April 12, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| April 12, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| April 12, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 6.0 μg/m3 (25) | 30.0 | |
| April 12, 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 | 6.0 μg/m3 (25) | 28.0 | |
| April 12, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| April 12, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 12, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 12, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 12, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 12, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 12, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 12, 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 | 6.0 μg/m3 (25) | 27.0 | |
| April 12, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | 6.0 μg/m3 (25) | 26.0 | |
| April 12, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 12, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| April 12, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| April 12, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 6.0 μg/m3 (25) | 41.0 | |
| April 12, 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 | 6.0 μg/m3 (25) | 34.0 | |
| April 12, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 6.0 μg/m3 (25) | 34.0 | |
| April 12, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| April 11, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 6.0 μg/m3 (25) | 38.0 | |
| April 11, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 6.0 μg/m3 (25) | 43.0 | |
| April 11, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 6.0 μg/m3 (25) | 47.0 | |
| April 11, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 6.0 μg/m3 (25) | 47.0 | |
| April 11, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 51.0 ppb (48) | N/A | N/A | 6.0 μg/m3 (25) | 48.0 | |
| April 11, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 51.0 ppb (48) | N/A | N/A | 6.0 μg/m3 (25) | 48.0 | |
| April 11, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 6.0 μg/m3 (25) | 47.0 | |
| April 11, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 48.0 ppb (45) | N/A | N/A | 6.0 μg/m3 (25) | 45.0 | |
| April 11, 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 | 6.0 μg/m3 (25) | 43.0 | |
| April 11, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 6.0 μg/m3 (25) | 41.0 | |
| April 11, 2021, 1 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 11, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 11, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 11, 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 | 4.0 μg/m3 (17) | 31.0 | |
| April 11, 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 | 4.0 μg/m3 (17) | 32.0 | |
| April 11, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 11, 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 | 6.0 μg/m3 (25) | 35.0 | |
| April 11, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| April 11, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 3.0 μg/m3 (13) | 40.0 | |
| April 11, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 6.0 μg/m3 (25) | 41.0 | |
| April 11, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 45.0 ppb (42) | N/A | N/A | 6.0 μg/m3 (25) | 42.0 | |
| April 11, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 6.0 μg/m3 (25) | 43.0 | |
| April 11, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 8.0 μg/m3 (34) | 43.0 | |
| April 11, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (30) | 32.0 | |
| April 10, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 4.0 μg/m3 (17) | 25.0 | |
| April 10, 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 | 6.0 μg/m3 (25) | 36.0 | |
| April 10, 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 | 5.0 μg/m3 (21) | 40.0 | |
| April 10, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 7.0 μg/m3 (30) | 41.0 | |
| April 10, 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 | 5.0 μg/m3 (21) | 37.0 | |
| April 10, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| April 10, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 2.0 μg/m3 (9) | 30.0 | |
| April 10, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 3.0 μg/m3 (13) | 31.0 | |
| April 10, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 3.0 μg/m3 (13) | 28.0 | |
| April 10, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | 1.0 μg/m3 (5) | 26.0 | |
| April 10, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 4.0 μg/m3 (17) | 25.0 | |
| April 10, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 4.0 μg/m3 (17) | 25.0 | |
| April 10, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 1.0 μg/m3 (5) | 25.0 | |
| April 10, 2021, 10 a.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 | |
| April 10, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 3.0 μg/m3 (13) | 25.0 | |
| April 10, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 4.0 μg/m3 (17) | 25.0 | |
| April 10, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 25.0 ppb (24) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 10, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 25.0 ppb (24) | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 10, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 10, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| April 10, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| April 10, 2021, 2 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 10, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| April 10, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| April 9, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 3.0 μg/m3 (13) | 32.0 | |
| April 9, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 9, 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 | 9.0 μg/m3 (38) | 38.0 | |
| April 9, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 8.0 μg/m3 (34) | 36.0 | |
| April 9, 2021, 7 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 9, 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 | 4.0 μg/m3 (17) | 35.0 | |
| April 9, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 3.0 μg/m3 (13) | 31.0 | |
| April 9, 2021, 4 p.m. | 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 | |
| April 9, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 32.0 ppb (30) | N/A | N/A | 2.0 μg/m3 (9) | 30.0 | |
| April 9, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 4.0 μg/m3 (17) | 28.0 | |
| April 9, 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 | 3.0 μg/m3 (13) | 26.0 | |
| April 9, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 9, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | N/A | 2.0 μg/m3 (9) | 25.0 | |
| April 9, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 27.0 ppb (25) | N/A | N/A | 3.0 μg/m3 (13) | 25.0 | |
| April 9, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 4.0 μg/m3 (17) | 26.0 | |
| April 9, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 28.0 ppb (26) | N/A | N/A | 2.0 μg/m3 (9) | 26.0 | |
| April 9, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 3.0 μg/m3 (13) | 28.0 | |
| April 9, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 30.0 ppb (28) | N/A | N/A | 0.0 μg/m3 (0) | 28.0 | |
| April 9, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 31.0 ppb (29) | N/A | N/A | 2.0 μg/m3 (9) | 29.0 | |
| April 9, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| April 9, 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 | 5.0 μg/m3 (21) | 34.0 | |
| April 9, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 3.0 μg/m3 (13) | 35.0 | |
| April 9, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 2.0 μg/m3 (9) | 35.0 | |
| April 9, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 3.0 μg/m3 (13) | 35.0 | |
| April 8, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| April 8, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 5.0 μg/m3 (21) | 38.0 | |
| April 8, 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 | 2.0 μg/m3 (9) | 39.0 | |
| April 8, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 3.0 μg/m3 (13) | 41.0 | |
| April 8, 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 | 3.0 μg/m3 (13) | 42.0 | |
| April 8, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 1.0 μg/m3 (5) | 43.0 | |
| April 8, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 45.0 ppb (42) | N/A | N/A | 1.0 μg/m3 (5) | 42.0 | |
| April 8, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 45.0 ppb (42) | N/A | N/A | 2.0 μg/m3 (9) | 42.0 | |
| April 8, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 3.0 μg/m3 (13) | 40.0 | |
| April 8, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 2.0 μg/m3 (9) | 39.0 | |
| April 8, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 2.0 μg/m3 (9) | 38.0 | |
| April 8, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 3.0 μg/m3 (13) | 37.0 | |
| April 8, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 8, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| April 8, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 6.0 μg/m3 (25) | 37.0 | |
| April 8, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 8, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 8, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 3.0 μg/m3 (13) | 38.0 | |
| April 8, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 8, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 7.0 μg/m3 (30) | 39.0 | |
| April 8, 2021, 3 a.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 8, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 4.0 μg/m3 (17) | 43.0 | |
| April 8, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 52.0 ppb (49) | N/A | N/A | 5.0 μg/m3 (21) | 49.0 | |
| April 8, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 53.0 ppb (50) | N/A | N/A | 5.0 μg/m3 (21) | 50.0 | |
| April 7, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 60.0 ppb (68) | N/A | N/A | 8.0 μg/m3 (34) | 68.0 | |
| April 7, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 65.0 ppb (84) | N/A | N/A | 9.0 μg/m3 (38) | 84.0 | |
| April 7, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 70.0 ppb (100) | N/A | N/A | 9.0 μg/m3 (38) | 100.0 | |
| April 7, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 71.0 ppb (101) | N/A | N/A | 14.0 μg/m3 (55) | 101.0 | |
| April 7, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 71.0 ppb (101) | N/A | N/A | 12.0 μg/m3 (50) | 101.0 | |
| April 7, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 68.0 ppb (94) | N/A | N/A | 13.0 μg/m3 (53) | 94.0 | |
| April 7, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 64.0 ppb (81) | N/A | N/A | 10.0 μg/m3 (42) | 81.0 | |
| April 7, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 58.0 ppb (61) | N/A | N/A | 9.0 μg/m3 (38) | 61.0 | |
| April 7, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 49.0 ppb (46) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 7, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 7.0 μg/m3 (30) | 38.0 | |
| April 7, 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 | 2.0 μg/m3 (9) | 33.0 | |
| April 7, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 21.0 ppb (20) | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 7, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 21.0 ppb (20) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 7, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 29.0 ppb (27) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 7, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| April 7, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 5.0 μg/m3 (21) | 33.0 | |
| April 7, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 33.0 ppb (31) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 7, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 35.0 ppb (33) | N/A | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 7, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 7, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (30) | 35.0 | |
| April 7, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 7.0 μg/m3 (30) | 38.0 | |
| April 7, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 6.0 μg/m3 (25) | 38.0 | |
| April 7, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 7.0 μg/m3 (30) | 41.0 | |
| April 7, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 7.0 μg/m3 (30) | 38.0 | |
| April 6, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 5.0 μg/m3 (21) | 39.0 | |
| April 6, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 54.0 ppb (50) | N/A | N/A | 5.0 μg/m3 (21) | 50.0 | |
| April 6, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 58.0 ppb (61) | N/A | N/A | 8.0 μg/m3 (34) | 61.0 | |
| April 6, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 59.0 ppb (65) | N/A | N/A | 5.0 μg/m3 (21) | 65.0 | |
| April 6, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 57.0 ppb (58) | N/A | N/A | 3.0 μg/m3 (13) | 58.0 | |
| April 6, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 54.0 ppb (50) | N/A | N/A | 6.0 μg/m3 (25) | 50.0 | |
| April 6, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 6.0 μg/m3 (25) | 47.0 | |
| April 6, 2021, 4 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 6, 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 | 7.0 μg/m3 (30) | 43.0 | |
| April 6, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 45.0 ppb (42) | N/A | N/A | 4.0 μg/m3 (17) | 42.0 | |
| April 6, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 44.0 ppb (41) | N/A | N/A | 3.0 μg/m3 (13) | 41.0 | |
| April 6, 2021, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 2.0 μg/m3 (9) | 39.0 | |
| April 6, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 5.0 μg/m3 (21) | 38.0 | |
| April 6, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 6, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 39.0 ppb (37) | N/A | N/A | 8.0 μg/m3 (34) | 37.0 | |
| April 6, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 6, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 6, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 34.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (30) | 32.0 | |
| April 6, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 6, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 40.0 ppb (38) | N/A | N/A | 8.0 μg/m3 (34) | 38.0 |