Castle Hayne (Holly Shelter Rd) NC, US: 34.364167, -77.838611
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 20, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.9 μg/m3 (12) | N/A | 12.0 | |
| April 20, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 12.0 μg/m3 (12) | N/A | 12.0 | |
| April 20, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 10.2 μg/m3 (10) | N/A | 10.0 | |
| April 20, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 10.3 μg/m3 (10) | N/A | 10.0 | |
| April 20, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 9.9 μg/m3 (10) | N/A | 10.0 | |
| April 20, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 10.7 μg/m3 (10) | N/A | 10.0 | |
| April 20, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 11.1 μg/m3 (11) | N/A | 14.0 | |
| April 20, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 11.5 μg/m3 (11) | N/A | 25.0 | |
| April 20, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 12.3 μg/m3 (12) | N/A | 39.0 | |
| April 19, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 12.9 μg/m3 (12) | N/A | 43.0 | |
| April 19, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 13.7 μg/m3 (13) | N/A | 44.0 | |
| April 19, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 18.6 μg/m3 (18) | N/A | 43.0 | |
| April 19, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 36.8 μg/m3 (35) | N/A | 39.0 | |
| April 19, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 41.4 μg/m3 (39) | N/A | 42.0 | |
| April 19, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 37.4 μg/m3 (35) | N/A | 42.0 | |
| April 19, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 29.0 μg/m3 (27) | N/A | 39.0 | |
| April 19, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | N/A | N/A | 40.0 | |
| April 19, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 22.3 μg/m3 (21) | 8.0 μg/m3 (34) | 42.0 | |
| April 19, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 20.7 μg/m3 (20) | 9.0 μg/m3 (38) | 39.0 | |
| April 19, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 19.8 μg/m3 (19) | 4.0 μg/m3 (17) | 38.0 | |
| April 19, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 12.7 μg/m3 (12) | 5.0 μg/m3 (21) | 27.0 | |
| April 19, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 12.8 μg/m3 (12) | 4.0 μg/m3 (17) | 17.0 | |
| April 19, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 13.5 μg/m3 (13) | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 12.7 μg/m3 (12) | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.5 μg/m3 (14) | 8.0 μg/m3 (34) | 34.0 | |
| April 19, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 14.5 μg/m3 (14) | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 15.2 μg/m3 (15) | 8.0 μg/m3 (34) | 34.0 | |
| April 19, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 15.0 μg/m3 (14) | 8.0 μg/m3 (34) | 34.0 | |
| April 19, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 15.5 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 13.2 μg/m3 (13) | 7.0 μg/m3 (30) | 30.0 | |
| April 19, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 12.5 μg/m3 (12) | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 11.9 μg/m3 (12) | 5.0 μg/m3 (21) | 21.0 | |
| April 19, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 12.9 μg/m3 (12) | 6.0 μg/m3 (25) | 25.0 | |
| April 18, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 13.7 μg/m3 (13) | 9.0 μg/m3 (38) | 45.0 | |
| April 18, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 15.3 μg/m3 (15) | 6.0 μg/m3 (25) | 51.0 | |
| April 18, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 14.1 μg/m3 (14) | 5.0 μg/m3 (21) | 51.0 | |
| April 18, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 15.2 μg/m3 (15) | 5.0 μg/m3 (21) | 51.0 | |
| April 18, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 15.2 μg/m3 (15) | 7.0 μg/m3 (30) | 55.0 | |
| April 18, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 17.0 μg/m3 (16) | 5.0 μg/m3 (21) | 55.0 | |
| April 18, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 19.9 μg/m3 (19) | 3.0 μg/m3 (13) | 55.0 | |
| April 18, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 17.6 μg/m3 (17) | 3.0 μg/m3 (13) | 55.0 | |
| April 18, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 16.8 μg/m3 (16) | 4.0 μg/m3 (17) | 50.0 | |
| April 18, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | N/A | 17.8 μg/m3 (17) | 7.0 μg/m3 (30) | 48.0 | |
| April 18, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 18.2 μg/m3 (17) | 10.0 μg/m3 (42) | 42.0 | |
| April 18, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 19.4 μg/m3 (18) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 19.1 μg/m3 (18) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 19.4 μg/m3 (18) | 13.0 μg/m3 (53) | 53.0 | |
| April 18, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | 16.3 μg/m3 (16) | 9.0 μg/m3 (38) | 38.0 | |
| April 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 μg/m3 (16) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | 16.6 μg/m3 (16) | 10.0 μg/m3 (42) | 42.0 | |
| April 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 17.2 μg/m3 (16) | 9.0 μg/m3 (38) | 38.0 | |
| April 18, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 17.3 μg/m3 (17) | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 16.1 μg/m3 (15) | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 15.7 μg/m3 (15) | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 15.8 μg/m3 (15) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 15.6 μg/m3 (15) | 8.0 μg/m3 (34) | 34.0 | |
| April 18, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 14.7 μg/m3 (14) | 4.0 μg/m3 (17) | 26.0 | |
| April 17, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 15.1 μg/m3 (14) | 4.0 μg/m3 (17) | 41.0 | |
| April 17, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 15.0 μg/m3 (14) | 3.0 μg/m3 (13) | 46.0 | |
| April 17, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 14.5 μg/m3 (14) | 3.0 μg/m3 (13) | 46.0 | |
| April 17, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 16.3 μg/m3 (16) | 2.0 μg/m3 (9) | 45.0 | |
| April 17, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 15.1 μg/m3 (14) | 0.0 μg/m3 (0) | 45.0 | |
| April 17, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 13.2 μg/m3 (13) | 2.0 μg/m3 (9) | 43.0 | |
| April 17, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 14.0 μg/m3 (13) | 4.0 μg/m3 (17) | 41.0 | |
| April 17, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 14.1 μg/m3 (14) | 4.0 μg/m3 (17) | 38.0 | |
| April 17, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 13.9 μg/m3 (13) | 2.0 μg/m3 (9) | 37.0 | |
| April 17, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 13.3 μg/m3 (13) | 4.0 μg/m3 (17) | 34.0 | |
| April 17, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 13.2 μg/m3 (13) | 6.0 μg/m3 (25) | 29.0 | |
| April 17, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 14.6 μg/m3 (14) | 8.0 μg/m3 (34) | 34.0 | |
| April 17, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 15.2 μg/m3 (15) | 9.0 μg/m3 (38) | 38.0 | |
| April 17, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 17.8 μg/m3 (17) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 18.7 μg/m3 (18) | 9.0 μg/m3 (38) | 38.0 | |
| April 17, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.2 μg/m3 (12) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 13.2 μg/m3 (13) | 7.0 μg/m3 (30) | 30.0 | |
| April 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 12.5 μg/m3 (12) | 8.0 μg/m3 (34) | 34.0 | |
| April 17, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 11.3 μg/m3 (11) | 7.0 μg/m3 (30) | 30.0 | |
| April 17, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 11.1 μg/m3 (11) | 9.0 μg/m3 (38) | 38.0 | |
| April 17, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 12.7 μg/m3 (12) | 7.0 μg/m3 (30) | 30.0 | |
| April 17, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 11.4 μg/m3 (11) | 6.0 μg/m3 (25) | 32.0 | |
| April 17, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 10.4 μg/m3 (10) | 4.0 μg/m3 (17) | 29.0 | |
| April 17, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 10.5 μg/m3 (10) | 5.0 μg/m3 (21) | 31.0 | |
| April 16, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 10.8 μg/m3 (10) | 5.0 μg/m3 (21) | 34.0 | |
| April 16, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 12.2 μg/m3 (12) | 2.0 μg/m3 (9) | 38.0 | |
| April 16, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 12.8 μg/m3 (12) | 2.0 μg/m3 (9) | 39.0 | |
| April 16, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 14.1 μg/m3 (14) | 2.0 μg/m3 (9) | 42.0 | |
| April 16, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 9.6 μg/m3 (9) | 2.0 μg/m3 (9) | 41.0 | |
| April 16, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 10.6 μg/m3 (10) | 3.0 μg/m3 (13) | 40.0 | |
| April 16, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 11.6 μg/m3 (11) | 2.0 μg/m3 (9) | 38.0 | |
| April 16, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 9.7 μg/m3 (9) | -1.0 μg/m3 (0) | 37.0 | |
| April 16, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 11.4 μg/m3 (11) | 0.0 μg/m3 (0) | 34.0 | |
| April 16, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 8.7 μg/m3 (9) | 4.0 μg/m3 (17) | 31.0 | |
| April 16, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 8.8 μg/m3 (9) | 6.0 μg/m3 (25) | 29.0 | |
| April 16, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 11.0 μg/m3 (11) | 5.0 μg/m3 (21) | 27.0 | |
| April 16, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 12.3 μg/m3 (12) | 5.0 μg/m3 (21) | 25.0 | |
| April 16, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 11.1 μg/m3 (11) | 6.0 μg/m3 (25) | 26.0 | |
| April 16, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 12.8 μg/m3 (12) | 7.0 μg/m3 (30) | 30.0 | |
| April 16, 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) | 10.0 μg/m3 (42) | 42.0 | |
| April 16, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 13.1 μg/m3 (13) | 7.0 μg/m3 (30) | 30.0 | |
| April 16, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 17.1 μg/m3 (16) | 9.0 μg/m3 (38) | 38.0 | |
| April 16, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 20.2 μg/m3 (19) | 9.0 μg/m3 (38) | 38.0 | |
| April 16, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 15.9 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| April 16, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 13.7 μg/m3 (13) | 9.0 μg/m3 (38) | 38.0 | |
| April 16, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 14.3 μg/m3 (14) | 7.0 μg/m3 (30) | 30.0 | |
| April 16, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 14.0 μg/m3 (13) | 9.0 μg/m3 (38) | 38.0 | |
| April 16, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| April 15, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 16.4 μg/m3 (16) | 7.0 μg/m3 (30) | 30.0 | |
| April 15, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 18.2 μg/m3 (17) | 8.0 μg/m3 (34) | 34.0 | |
| April 15, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 18.2 μg/m3 (17) | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 18.2 μg/m3 (17) | 10.0 μg/m3 (42) | 42.0 | |
| April 15, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 20.7 μg/m3 (20) | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 24.2 μg/m3 (23) | 7.0 μg/m3 (30) | 39.0 | |
| April 15, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 21.0 μg/m3 (20) | 8.0 μg/m3 (34) | 47.0 | |
| April 15, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 18.5 μg/m3 (18) | 4.0 μg/m3 (17) | 43.0 | |
| April 15, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 19.5 μg/m3 (19) | 5.0 μg/m3 (21) | 40.0 | |
| April 15, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 19.5 μg/m3 (19) | 5.0 μg/m3 (21) | 38.0 | |
| April 15, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 20.6 μg/m3 (20) | 5.0 μg/m3 (21) | 38.0 | |
| April 15, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 20.1 μg/m3 (19) | 7.0 μg/m3 (30) | 36.0 | |
| April 15, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 21.0 μg/m3 (20) | 6.0 μg/m3 (25) | 35.0 | |
| April 15, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 19.9 μg/m3 (19) | 6.0 μg/m3 (25) | 38.0 | |
| April 15, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 19.3 μg/m3 (18) | 4.0 μg/m3 (17) | 38.0 | |
| April 15, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.9 μg/m3 (16) | 4.0 μg/m3 (17) | 17.0 | |
| April 15, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 16.9 μg/m3 (16) | 5.0 μg/m3 (21) | 41.0 | |
| April 15, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 17.5 μg/m3 (17) | 5.0 μg/m3 (21) | 44.0 | |
| April 15, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 18.7 μg/m3 (18) | 5.0 μg/m3 (21) | 45.0 | |
| April 15, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 18.5 μg/m3 (18) | 4.0 μg/m3 (17) | 44.0 | |
| April 15, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 17.8 μg/m3 (17) | 3.0 μg/m3 (13) | 43.0 | |
| April 15, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 18.6 μg/m3 (18) | 2.0 μg/m3 (9) | 42.0 | |
| April 15, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 18.1 μg/m3 (17) | 2.0 μg/m3 (9) | 42.0 | |
| April 15, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 14.4 μg/m3 (14) | 2.0 μg/m3 (9) | 44.0 | |
| April 14, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 20.7 μg/m3 (20) | 3.0 μg/m3 (13) | 45.0 | |
| April 14, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 25.4 μg/m3 (24) | 2.0 μg/m3 (9) | 46.0 | |
| April 14, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 21.2 μg/m3 (20) | 3.0 μg/m3 (13) | 45.0 | |
| April 14, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 48.4 μg/m3 (45) | 6.0 μg/m3 (25) | 45.0 | |
| April 14, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 74.5 μg/m3 (61) | 6.0 μg/m3 (25) | 61.0 | |
| April 14, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 43.1 μg/m3 (40) | 3.0 μg/m3 (13) | 42.0 | |
| April 14, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 25.9 μg/m3 (24) | 2.0 μg/m3 (9) | 43.0 | |
| April 14, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 15.1 μg/m3 (14) | 1.0 μg/m3 (5) | 41.0 | |
| April 14, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 12.8 μg/m3 (12) | 1.0 μg/m3 (5) | 40.0 | |
| April 14, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 13.8 μg/m3 (13) | 2.0 μg/m3 (9) | 38.0 | |
| April 14, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 12.1 μg/m3 (12) | 0.0 μg/m3 (0) | 37.0 | |
| April 14, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 10.6 μg/m3 (10) | 3.0 μg/m3 (13) | 25.0 | |
| April 14, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 9.6 μg/m3 (9) | 5.0 μg/m3 (21) | 21.0 | |
| April 14, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 8.4 μg/m3 (8) | 6.0 μg/m3 (25) | 25.0 | |
| April 14, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 8.9 μg/m3 (9) | 3.0 μg/m3 (13) | 13.0 | |
| April 14, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.7 μg/m3 (9) | 4.0 μg/m3 (17) | 17.0 | |
| April 14, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 8.1 μg/m3 (8) | 5.0 μg/m3 (21) | 21.0 | |
| April 14, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 8.6 μg/m3 (8) | 2.0 μg/m3 (9) | 9.0 | |
| April 14, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 8.9 μg/m3 (9) | 0.0 μg/m3 (0) | 9.0 | |
| April 14, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 9.1 μg/m3 (9) | 4.0 μg/m3 (17) | 17.0 | |
| April 14, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 8.7 μg/m3 (9) | 7.0 μg/m3 (30) | 30.0 | |
| April 14, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 9.9 μg/m3 (10) | 7.0 μg/m3 (30) | 30.0 | |
| April 14, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 10.6 μg/m3 (10) | 8.0 μg/m3 (34) | 34.0 | |
| April 14, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 10.6 μg/m3 (10) | 8.0 μg/m3 (34) | 34.0 | |
| April 13, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 11.4 μg/m3 (11) | 1.0 μg/m3 (5) | 36.0 | |
| April 13, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 10.9 μg/m3 (11) | 0.0 μg/m3 (0) | 39.0 | |
| April 13, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 11.4 μg/m3 (11) | 2.0 μg/m3 (9) | 43.0 | |
| April 13, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 10.7 μg/m3 (10) | 2.0 μg/m3 (9) | 43.0 | |
| April 13, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 12.5 μg/m3 (12) | 1.0 μg/m3 (5) | 44.0 | |
| April 13, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 9.8 μg/m3 (10) | 0.0 μg/m3 (0) | 41.0 | |
| April 13, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 12.8 μg/m3 (12) | 3.0 μg/m3 (13) | 38.0 | |
| April 13, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 13.6 μg/m3 (13) | 5.0 μg/m3 (21) | 38.0 | |
| April 13, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 12.8 μg/m3 (12) | 5.0 μg/m3 (21) | 36.0 | |
| April 13, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 11.2 μg/m3 (11) | 6.0 μg/m3 (25) | 33.0 | |
| April 13, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 13.2 μg/m3 (13) | 8.0 μg/m3 (34) | 34.0 | |
| April 13, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 16.6 μg/m3 (16) | 9.0 μg/m3 (38) | 38.0 | |
| April 13, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 15.4 μg/m3 (15) | 8.0 μg/m3 (34) | 34.0 | |
| April 13, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 14.9 μg/m3 (14) | 8.0 μg/m3 (34) | 34.0 | |
| April 13, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 9.1 μg/m3 (9) | 6.0 μg/m3 (25) | 25.0 |