Gaston (Hurricane Dr) NC, US: 36.511708, -77.655389
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 14, 2021, 5 a.m. | 2.8 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 14, 2021, 4 a.m. | 3.1 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 14, 2021, 3 a.m. | 3.1 ppb (3) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 14, 2021, 2 a.m. | 2.6 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 14, 2021, 1 a.m. | 1.7 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 14, 2021, midnight | 1.2 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 | |
| May 13, 2021, 11 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 13, 2021, 10 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 13, 2021, 9 p.m. | 0.9 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 13, 2021, 8 p.m. | 0.9 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 13, 2021, 7 p.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| May 13, 2021, 6 p.m. | 1.1 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 13, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 13, 2021, 1 p.m. | 1.6 ppb (2) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 13, 2021, noon | 1.6 ppb (2) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 13, 2021, 11 a.m. | 1.2 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 13, 2021, 10 a.m. | 1.1 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 13, 2021, 9 a.m. | 0.9 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 13, 2021, 8 a.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 13, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 13, 2021, 6 a.m. | 1.5 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 13, 2021, 5 a.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 13, 2021, 4 a.m. | 2.5 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 13, 2021, 3 a.m. | 3.1 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 13, 2021, 2 a.m. | 3.8 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | -2.0 μg/m3 (0) | 4.0 | |
| May 13, 2021, 1 a.m. | 3.2 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 13, 2021, midnight | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 12, 2021, 11 p.m. | 2.1 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| May 12, 2021, 10 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 12, 2021, 9 p.m. | 1.5 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 12, 2021, 8 p.m. | 1.7 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 12, 2021, 7 p.m. | 2.0 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 12, 2021, 6 p.m. | 3.3 ppb (4) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 12, 2021, 5 p.m. | 3.8 ppb (4) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 12, 2021, 4 p.m. | 2.8 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 12, 2021, 3 p.m. | 2.3 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 12, 2021, 2 p.m. | 1.7 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 12, 2021, 1 p.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 12, 2021, noon | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 12, 2021, 11 a.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | -4.0 μg/m3 (0) | 2.0 | |
| May 12, 2021, 10 a.m. | 1.3 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 12, 2021, 9 a.m. | 1.1 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 12, 2021, 8 a.m. | 2.2 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 12, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 12, 2021, 6 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 12, 2021, 5 a.m. | 2.6 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 12, 2021, 4 a.m. | 2.4 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 12, 2021, 3 a.m. | 2.6 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 12, 2021, 2 a.m. | 2.4 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 12, 2021, 1 a.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 12, 2021, midnight | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 11, 2021, 11 p.m. | 0.7 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 11, 2021, 10 p.m. | 0.6 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 11, 2021, 9 p.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (55) | 55.0 | |
| May 11, 2021, 8 p.m. | 1.8 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 11, 2021, 7 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 11, 2021, 6 p.m. | 0.8 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 11, 2021, 5 p.m. | 0.6 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 11, 2021, 4 p.m. | 0.7 ppb (1) | 0.4 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 11, 2021, 3 p.m. | 0.7 ppb (1) | 0.4 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 11, 2021, 2 p.m. | 1.1 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 11, 2021, 1 p.m. | 2.5 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 11, 2021, noon | 4.8 ppb (5) | 1.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 11, 2021, 11 a.m. | 4.3 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 11, 2021, 10 a.m. | 2.7 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 11, 2021, 9 a.m. | 1.3 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 11, 2021, 8 a.m. | 1.2 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 11, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 11, 2021, 6 a.m. | 2.8 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 11, 2021, 5 a.m. | 2.5 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 11, 2021, 4 a.m. | 2.1 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 11, 2021, 3 a.m. | 2.4 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 11, 2021, 2 a.m. | 2.1 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 11, 2021, 1 a.m. | 1.6 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 11, 2021, midnight | 1.3 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 10, 2021, 11 p.m. | 1.1 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 10, 2021, 10 p.m. | 1.3 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 10, 2021, 9 p.m. | 2.1 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 10, 2021, 8 p.m. | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 3.0 | |
| May 10, 2021, 7 p.m. | 3.2 ppb (4) | 1.2 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (58) | 58.0 | |
| May 10, 2021, 6 p.m. | 1.6 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (55) | 55.0 | |
| May 10, 2021, 5 p.m. | 0.9 ppb (1) | 0.4 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (55) | 55.0 | |
| May 10, 2021, 4 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, 3 p.m. | 1.1 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (58) | 58.0 | |
| May 10, 2021, 2 p.m. | 1.4 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, 1 p.m. | 1.2 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 17.0 μg/m3 (62) | 62.0 | |
| May 10, 2021, noon | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 | |
| May 10, 2021, 11 a.m. | 0.7 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 | |
| May 10, 2021, 10 a.m. | 0.7 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 10, 2021, 9 a.m. | 0.7 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 10, 2021, 8 a.m. | 0.8 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 10, 2021, 6 a.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 10, 2021, 5 a.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 10, 2021, 4 a.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 10, 2021, 3 a.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 10, 2021, 2 a.m. | 0.8 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 10, 2021, 1 a.m. | 0.8 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 10, 2021, midnight | 0.7 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 9, 2021, 11 p.m. | 0.7 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 9, 2021, 10 p.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 9, 2021, 9 p.m. | 0.6 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 9, 2021, 8 p.m. | 0.5 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, 7 p.m. | 0.5 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 9, 2021, 6 p.m. | 0.5 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 9, 2021, 5 p.m. | 0.6 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 9, 2021, 4 p.m. | 0.9 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 9, 2021, 3 p.m. | 2.0 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 9, 2021, 2 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 9, 2021, 1 p.m. | 1.0 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, noon | 2.2 ppb (3) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 9, 2021, 11 a.m. | 3.3 ppb (4) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 9, 2021, 10 a.m. | 2.8 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 9, 2021, 9 a.m. | 3.1 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 9, 2021, 8 a.m. | 2.1 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 9, 2021, 6 a.m. | 3.9 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 9, 2021, 5 a.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 9, 2021, 4 a.m. | 1.4 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 9, 2021, 3 a.m. | 1.4 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 2.0 | |
| May 9, 2021, 2 a.m. | 1.4 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 9, 2021, 1 a.m. | 1.7 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | -3.0 μg/m3 (0) | 2.0 | |
| May 9, 2021, midnight | 0.9 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | -3.0 μg/m3 (0) | 1.0 | |
| May 8, 2021, 11 p.m. | 0.3 ppb (1) | 0.1 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 1.0 | |
| May 8, 2021, 10 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, 9 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, 8 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 8, 2021, 7 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 8, 2021, 6 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 8, 2021, 5 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, 4 p.m. | 0.3 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 8, 2021, 3 p.m. | 0.5 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 8, 2021, 2 p.m. | 0.6 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 8, 2021, 1 p.m. | 1.1 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 8, 2021, noon | 1.4 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 8, 2021, 11 a.m. | 0.9 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, 10 a.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 8, 2021, 9 a.m. | 0.7 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 8, 2021, 8 a.m. | 0.9 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 8, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, 6 a.m. | 1.0 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| May 8, 2021, 5 a.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 8, 2021, 4 a.m. | 1.4 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 8, 2021, 3 a.m. | 1.1 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, 2 a.m. | 1.2 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| May 8, 2021, 1 a.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 8, 2021, midnight | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 7, 2021, 11 p.m. | 0.6 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 7, 2021, 10 p.m. | 0.5 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| May 7, 2021, 9 p.m. | 0.4 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| May 7, 2021, 8 p.m. | 0.5 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 7, 2021, 7 p.m. | 0.5 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 7, 2021, 6 p.m. | 0.5 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 7, 2021, 5 p.m. | 0.7 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 7, 2021, 4 p.m. | 0.9 ppb (1) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 7, 2021, 3 p.m. | 1.4 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 7, 2021, 2 p.m. | 4.2 ppb (4) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 7, 2021, 1 p.m. | 8.0 ppb (8) | 2.7 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 7, 2021, noon | 7.5 ppb (8) | 2.7 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 7, 2021, 11 a.m. | 5.4 ppb (6) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 7, 2021, 10 a.m. | 3.7 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| May 7, 2021, 9 a.m. | 3.3 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 7, 2021, 8 a.m. | 4.7 ppb (5) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 7, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 7, 2021, 6 a.m. | 5.9 ppb (6) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 7, 2021, 5 a.m. | 6.8 ppb (7) | 0.7 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 | |
| May 7, 2021, 4 a.m. | 2.8 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 7, 2021, 3 a.m. | 2.7 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (13) | 13.0 |