Morrisville (Dan K Moore Fwy) NC, US: 35.8652, -78.8197
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 21, 2021, 5 p.m. | 17.2 ppb (17) | 6.8 ppb (7) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | N/A | 17.0 | |
| April 21, 2021, 4 p.m. | 15.3 ppb (15) | 7.5 ppb (8) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | N/A | 15.0 | |
| April 21, 2021, 3 p.m. | 15.6 ppb (15) | 7.6 ppb (8) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | N/A | 15.0 | |
| April 21, 2021, 2 p.m. | 20.6 ppb (20) | 10.6 ppb (10) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | N/A | 20.0 | |
| April 21, 2021, 1 p.m. | 20.7 ppb (20) | 10.6 ppb (10) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | N/A | 20.0 | |
| April 21, 2021, noon | 23.3 ppb (22) | 11.0 ppb (11) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | N/A | 22.0 | |
| April 21, 2021, 11 a.m. | 35.0 ppb (34) | 17.3 ppb (17) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | N/A | 34.0 | |
| April 21, 2021, 10 a.m. | 41.3 ppb (39) | 18.9 ppb (18) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | N/A | 39.0 | |
| April 21, 2021, 9 a.m. | 17.0 ppb (17) | 4.2 ppb (4) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | N/A | 17.0 | |
| April 21, 2021, 8 a.m. | 19.8 ppb (19) | 4.5 ppb (5) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | N/A | 19.0 | |
| April 21, 2021, 7 a.m. | 16.5 ppb (16) | 3.9 ppb (4) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 | |
| April 21, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.19 ppb (3) | N/A | N/A | 3.0 | |
| April 21, 2021, 5 a.m. | 9.3 ppb (9) | 1.3 ppb (2) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | N/A | 9.0 | |
| April 21, 2021, 4 a.m. | 10.1 ppb (10) | 2.2 ppb (3) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | N/A | 10.0 | |
| April 21, 2021, 3 a.m. | 7.4 ppb (7) | 1.7 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | N/A | 7.0 | |
| April 21, 2021, 2 a.m. | 11.2 ppb (11) | 2.2 ppb (3) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | N/A | 11.0 | |
| April 21, 2021, 1 a.m. | 13.2 ppb (13) | 3.2 ppb (4) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | N/A | 13.0 | |
| April 21, 2021, midnight | 13.0 ppb (13) | 2.8 ppb (3) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | N/A | 13.0 | |
| April 20, 2021, 11 p.m. | 18.8 ppb (18) | 4.8 ppb (5) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | N/A | 18.0 | |
| April 20, 2021, 10 p.m. | 18.9 ppb (18) | 7.6 ppb (8) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | N/A | 18.0 | |
| April 20, 2021, 9 p.m. | 19.0 ppb (18) | 7.7 ppb (8) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | N/A | 18.0 | |
| April 20, 2021, 8 p.m. | 15.9 ppb (15) | 7.1 ppb (7) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | N/A | 15.0 | |
| April 20, 2021, 7 p.m. | 22.6 ppb (22) | 8.6 ppb (9) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | N/A | 22.0 | |
| April 20, 2021, 6 p.m. | 18.6 ppb (18) | 8.5 ppb (9) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | N/A | 18.0 | |
| April 20, 2021, 5 p.m. | 16.4 ppb (16) | 8.0 ppb (8) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | N/A | 16.0 | |
| April 20, 2021, 4 p.m. | 20.0 ppb (19) | 9.1 ppb (9) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | N/A | 19.0 | |
| April 20, 2021, 3 p.m. | 24.8 ppb (24) | 11.6 ppb (11) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 2 p.m. | 28.1 ppb (27) | 14.1 ppb (14) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 20, 2021, 1 p.m. | 39.3 ppb (38) | 22.0 ppb (21) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 15.0 μg/m3 (58) | 58.0 | |
| April 20, 2021, noon | 86.2 ppb (86) | 68.5 ppb (67) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.68 ppb (8) | N/A | 11.0 μg/m3 (46) | 86.0 | |
| April 20, 2021, 11 a.m. | 100.3 ppb (101) | 86.9 ppb (87) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.88 ppb (11) | N/A | 9.0 μg/m3 (38) | 101.0 | |
| April 20, 2021, 10 a.m. | 34.2 ppb (33) | 22.9 ppb (22) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 5.0 μg/m3 (21) | 33.0 | |
| April 20, 2021, 9 a.m. | 26.0 ppb (25) | 15.1 ppb (15) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 20, 2021, 8 a.m. | 17.5 ppb (17) | 6.1 ppb (6) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 7 a.m. | 13.4 ppb (13) | 2.1 ppb (2) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 20, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 20, 2021, 5 a.m. | 20.2 ppb (20) | 2.7 ppb (3) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 4 a.m. | 30.9 ppb (30) | 8.3 ppb (8) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 20, 2021, 3 a.m. | 41.8 ppb (40) | 18.6 ppb (18) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 9.0 μg/m3 (38) | 40.0 | |
| April 20, 2021, 2 a.m. | 31.4 ppb (30) | 6.0 ppb (6) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.4 ppb (5) | N/A | 6.0 μg/m3 (25) | 30.0 | |
| April 20, 2021, 1 a.m. | 20.7 ppb (20) | 1.3 ppb (2) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 0.0 μg/m3 (0) | 20.0 | |
| April 20, 2021, midnight | 4.1 ppb (4) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.18 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 19, 2021, 11 p.m. | 1.9 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 19, 2021, 10 p.m. | 1.9 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 19, 2021, 9 p.m. | 6.9 ppb (7) | 3.3 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 19, 2021, 8 p.m. | 6.4 ppb (7) | 2.7 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 19, 2021, 7 p.m. | 8.7 ppb (9) | 4.3 ppb (5) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 19, 2021, 6 p.m. | 14.7 ppb (14) | 7.5 ppb (8) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 2.0 μg/m3 (9) | 14.0 | |
| April 19, 2021, 5 p.m. | 7.3 ppb (7) | 3.3 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, 4 p.m. | 8.3 ppb (8) | 3.8 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 19, 2021, 3 p.m. | 2.7 ppb (3) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 19, 2021, 2 p.m. | 6.7 ppb (7) | 2.6 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, 1 p.m. | 6.6 ppb (7) | 2.8 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, noon | 7.7 ppb (8) | 3.3 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 11 a.m. | 11.5 ppb (11) | 4.8 ppb (5) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 19, 2021, 10 a.m. | 18.3 ppb (18) | 7.4 ppb (7) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 19, 2021, 9 a.m. | 12.7 ppb (12) | 5.5 ppb (6) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 19, 2021, 8 a.m. | 8.5 ppb (9) | 0.5 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 7 a.m. | 17.6 ppb (17) | 2.9 ppb (3) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 19, 2021, 5 a.m. | 22.4 ppb (22) | 6.6 ppb (7) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 19, 2021, 4 a.m. | 9.7 ppb (10) | 0.5 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 3 a.m. | 7.6 ppb (8) | 0.4 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 19, 2021, 2 a.m. | 22.6 ppb (22) | 1.3 ppb (2) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 4.0 μg/m3 (17) | 22.0 | |
| April 19, 2021, 1 a.m. | 15.7 ppb (15) | 3.1 ppb (3) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 2.0 μg/m3 (9) | 15.0 | |
| April 19, 2021, midnight | 2.5 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 18, 2021, 11 p.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 18, 2021, 10 p.m. | 12.9 ppb (13) | 5.0 ppb (5) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 18, 2021, 9 p.m. | 13.3 ppb (13) | 5.3 ppb (5) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.37 ppb (5) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 18, 2021, 8 p.m. | 9.2 ppb (9) | 3.6 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 18, 2021, 7 p.m. | 9.5 ppb (9) | 4.3 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 18, 2021, 6 p.m. | 8.4 ppb (8) | 3.7 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 5 p.m. | 3.5 ppb (4) | 1.3 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.18 ppb (3) | N/A | 2.0 μg/m3 (9) | 9.0 | |
| April 18, 2021, 4 p.m. | 5.0 ppb (5) | 2.3 ppb (3) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 18, 2021, 3 p.m. | 5.2 ppb (5) | 2.3 ppb (3) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 18, 2021, 2 p.m. | 4.1 ppb (4) | 1.9 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 18, 2021, 1 p.m. | 5.9 ppb (6) | 2.6 ppb (3) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 18, 2021, noon | 5.4 ppb (6) | 1.9 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 18, 2021, 11 a.m. | 3.2 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 18, 2021, 10 a.m. | 4.5 ppb (5) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 18, 2021, 9 a.m. | 6.2 ppb (6) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 8 a.m. | 8.4 ppb (8) | 1.5 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 7 a.m. | 11.0 ppb (11) | 1.6 ppb (2) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (58) | 58.0 | |
| April 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 5 a.m. | 31.4 ppb (30) | 15.4 ppb (15) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.53 ppb (6) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 18, 2021, 4 a.m. | 27.9 ppb (27) | 11.0 ppb (11) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.48 ppb (6) | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 18, 2021, 3 a.m. | 20.3 ppb (20) | 5.3 ppb (5) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 4.0 μg/m3 (17) | 20.0 | |
| April 18, 2021, 2 a.m. | 16.6 ppb (16) | 0.5 ppb (1) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 18, 2021, 1 a.m. | 5.1 ppb (5) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 18, 2021, midnight | 2.7 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 17, 2021, 11 p.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 17, 2021, 10 p.m. | 10.8 ppb (11) | 3.7 ppb (4) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 17, 2021, 9 p.m. | 14.8 ppb (14) | 5.9 ppb (6) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 17, 2021, 8 p.m. | 12.4 ppb (12) | 5.0 ppb (5) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.38 ppb (5) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 17, 2021, 7 p.m. | 11.4 ppb (11) | 4.8 ppb (5) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 17, 2021, 6 p.m. | 10.5 ppb (10) | 4.4 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 17, 2021, 5 p.m. | 12.5 ppb (12) | 5.3 ppb (5) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 17, 2021, 4 p.m. | 14.4 ppb (14) | 7.1 ppb (7) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 17, 2021, 3 p.m. | 9.0 ppb (9) | 3.8 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 17, 2021, 2 p.m. | 11.2 ppb (11) | 4.9 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 17, 2021, 1 p.m. | 10.9 ppb (11) | 4.4 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.26 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 17, 2021, noon | 30.5 ppb (29) | 15.5 ppb (15) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.39 ppb (5) | N/A | 2.0 μg/m3 (9) | 29.0 | |
| April 17, 2021, 11 a.m. | 7.5 ppb (8) | 1.5 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 17, 2021, 10 a.m. | 5.8 ppb (6) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 17, 2021, 9 a.m. | 5.1 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 17, 2021, 8 a.m. | 1.8 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 17, 2021, 7 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 | |
| April 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 17, 2021, 5 a.m. | 17.6 ppb (17) | 3.6 ppb (4) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 17, 2021, 4 a.m. | 24.3 ppb (23) | 4.2 ppb (4) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.47 ppb (6) | N/A | 4.0 μg/m3 (17) | 23.0 | |
| April 17, 2021, 3 a.m. | 21.4 ppb (21) | 5.3 ppb (5) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 17, 2021, 2 a.m. | 15.2 ppb (15) | 0.4 ppb (1) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 3.0 μg/m3 (13) | 15.0 | |
| April 17, 2021, 1 a.m. | 11.2 ppb (11) | 0.5 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 17, 2021, midnight | 12.3 ppb (12) | 2.9 ppb (3) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.29 ppb (4) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 16, 2021, 11 p.m. | 22.4 ppb (22) | 8.4 ppb (8) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 16, 2021, 10 p.m. | 31.3 ppb (30) | 16.5 ppb (16) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.46 ppb (6) | N/A | 1.0 μg/m3 (5) | 30.0 | |
| April 16, 2021, 9 p.m. | 19.1 ppb (19) | 9.7 ppb (10) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 3.0 μg/m3 (13) | 19.0 | |
| April 16, 2021, 8 p.m. | 14.8 ppb (14) | 7.3 ppb (7) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 3.0 μg/m3 (13) | 14.0 | |
| April 16, 2021, 7 p.m. | 16.2 ppb (16) | 8.6 ppb (9) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.3 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 16, 2021, 6 p.m. | 18.5 ppb (18) | 9.5 ppb (9) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 16, 2021, 5 p.m. | 14.7 ppb (14) | 7.5 ppb (8) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 16, 2021, 4 p.m. | 18.1 ppb (18) | 9.4 ppb (9) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 16, 2021, 3 p.m. | 22.1 ppb (21) | 12.4 ppb (12) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 16, 2021, 2 p.m. | 16.7 ppb (16) | 8.9 ppb (9) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 16, 2021, 1 p.m. | 27.4 ppb (26) | 16.1 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 16, 2021, noon | 38.4 ppb (37) | 23.0 ppb (22) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 6.0 μg/m3 (25) | 37.0 | |
| April 16, 2021, 11 a.m. | 64.7 ppb (63) | 45.4 ppb (43) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.57 ppb (7) | N/A | 8.0 μg/m3 (34) | 63.0 | |
| April 16, 2021, 10 a.m. | 40.2 ppb (38) | 22.4 ppb (22) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 16, 2021, 9 a.m. | 24.1 ppb (23) | 6.4 ppb (7) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 3.0 μg/m3 (13) | 23.0 | |
| April 16, 2021, 8 a.m. | 5.5 ppb (6) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 16, 2021, 7 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 | 4.0 μg/m3 (17) | 17.0 | |
| April 16, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 16, 2021, 5 a.m. | 1.3 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 16, 2021, 4 a.m. | 1.4 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 16, 2021, 3 a.m. | 2.2 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | N/A | -2.0 μg/m3 (0) | 3.0 | |
| April 16, 2021, 2 a.m. | 4.6 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 2.0 μg/m3 (9) | 9.0 | |
| April 16, 2021, 1 a.m. | 12.4 ppb (12) | 0.3 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 2.0 μg/m3 (9) | 12.0 | |
| April 16, 2021, midnight | 4.3 ppb (5) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 15, 2021, 11 p.m. | 15.2 ppb (15) | 3.8 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 15, 2021, 10 p.m. | 18.4 ppb (18) | 6.9 ppb (7) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.36 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 15, 2021, 9 p.m. | 15.6 ppb (15) | 6.2 ppb (6) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 8 p.m. | 13.3 ppb (13) | 5.8 ppb (6) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.28 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 15, 2021, 7 p.m. | 21.8 ppb (21) | 10.5 ppb (10) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 15, 2021, 6 p.m. | 23.9 ppb (23) | 11.3 ppb (11) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 15, 2021, 5 p.m. | 12.1 ppb (12) | 5.3 ppb (5) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 15, 2021, 4 p.m. | 17.3 ppb (17) | 8.3 ppb (8) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | -2.0 μg/m3 (0) | 17.0 | |
| April 15, 2021, 3 p.m. | 10.7 ppb (11) | 4.9 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 15, 2021, 2 p.m. | 6.7 ppb (7) | 2.7 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.22 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 15, 2021, 1 p.m. | 7.8 ppb (8) | 3.1 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 15, 2021, noon | 12.9 ppb (13) | 5.2 ppb (5) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 15, 2021, 11 a.m. | 13.4 ppb (13) | 4.9 ppb (5) | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 15, 2021, 10 a.m. | 14.6 ppb (14) | 5.3 ppb (5) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.31 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 15, 2021, 9 a.m. | 10.1 ppb (10) | 3.9 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.27 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 8 a.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.19 ppb (3) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 15, 2021, 7 a.m. | 1.9 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (3) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| April 15, 2021, 5 a.m. | 3.1 ppb (3) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.21 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 4 a.m. | 5.5 ppb (6) | 1.4 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 15, 2021, 3 a.m. | 5.9 ppb (6) | 0.8 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| April 15, 2021, 2 a.m. | 7.3 ppb (7) | 1.9 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 1 a.m. | 8.6 ppb (9) | 2.1 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 15, 2021, midnight | 12.9 ppb (13) | 3.0 ppb (3) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 14, 2021, 11 p.m. | 20.8 ppb (20) | 4.0 ppb (4) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.46 ppb (6) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| April 14, 2021, 10 p.m. | 27.2 ppb (26) | 7.1 ppb (7) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.47 ppb (6) | N/A | 21.0 μg/m3 (70) | 70.0 | |
| April 14, 2021, 9 p.m. | 21.1 ppb (20) | 5.9 ppb (6) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.46 ppb (6) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 14, 2021, 8 p.m. | 22.5 ppb (22) | 7.7 ppb (8) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (64) | 64.0 | |
| April 14, 2021, 7 p.m. | 20.6 ppb (20) | 7.3 ppb (7) | N/A | 13.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 14, 2021, 6 p.m. | 18.1 ppb (18) | 8.5 ppb (9) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (55) | 55.0 |