Hartford (Downtown) CT, US: 41.771444, -72.679923
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 10, 2021, 9 a.m. | N/A | N/A | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.25 ppb (3) | 15.7 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| April 10, 2021, 8 a.m. | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (3) | 14.4 μg/m3 (14) | 8.6 μg/m3 (36) | 36.0 | |
| April 10, 2021, 7 a.m. | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | N/A | 12.7 μg/m3 (12) | 7.2 μg/m3 (31) | 31.0 | |
| April 10, 2021, 6 a.m. | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (3) | 12.5 μg/m3 (12) | 5.9 μg/m3 (25) | 25.0 | |
| April 10, 2021, 5 a.m. | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.26 ppb (4) | 10.2 μg/m3 (10) | 4.7 μg/m3 (20) | 20.0 | |
| April 10, 2021, 4 a.m. | N/A | N/A | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.28 ppb (4) | 9.8 μg/m3 (10) | 4.9 μg/m3 (21) | 21.0 | |
| April 10, 2021, 3 a.m. | N/A | N/A | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.33 ppb (4) | 11.2 μg/m3 (11) | 5.3 μg/m3 (23) | 23.0 | |
| April 10, 2021, 2 a.m. | N/A | N/A | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.36 ppb (5) | 11.9 μg/m3 (12) | 5.2 μg/m3 (22) | 22.0 | |
| April 10, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.33 ppb (4) | 11.8 μg/m3 (11) | 5.3 μg/m3 (23) | 23.0 | |
| April 10, 2021, midnight | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.32 ppb (4) | 11.8 μg/m3 (11) | 5.1 μg/m3 (22) | 22.0 | |
| April 9, 2021, 11 p.m. | N/A | N/A | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.46 ppb (6) | 12.3 μg/m3 (12) | 4.5 μg/m3 (19) | 19.0 | |
| April 9, 2021, 10 p.m. | N/A | N/A | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.37 ppb (5) | 12.1 μg/m3 (12) | 4.3 μg/m3 (18) | 18.0 | |
| April 9, 2021, 9 p.m. | N/A | N/A | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.39 ppb (5) | 13.2 μg/m3 (13) | 3.7 μg/m3 (16) | 16.0 | |
| April 9, 2021, 8 p.m. | N/A | N/A | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.41 ppb (5) | 14.5 μg/m3 (14) | 3.8 μg/m3 (16) | 16.0 | |
| April 9, 2021, 7 p.m. | N/A | N/A | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.45 ppb (6) | 14.9 μg/m3 (14) | 4.5 μg/m3 (19) | 19.0 | |
| April 9, 2021, 6 p.m. | N/A | N/A | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.42 ppb (5) | 13.6 μg/m3 (13) | 3.8 μg/m3 (16) | 17.0 | |
| April 9, 2021, 5 p.m. | N/A | N/A | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.33 ppb (4) | 12.3 μg/m3 (12) | 3.9 μg/m3 (17) | 17.0 | |
| April 9, 2021, 4 p.m. | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.29 ppb (4) | 11.2 μg/m3 (11) | 3.7 μg/m3 (16) | 16.0 | |
| April 9, 2021, 3 p.m. | N/A | N/A | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.32 ppb (4) | 15.5 μg/m3 (15) | 4.9 μg/m3 (21) | 21.0 | |
| April 9, 2021, 2 p.m. | N/A | N/A | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.33 ppb (4) | 19.8 μg/m3 (19) | 6.8 μg/m3 (29) | 29.0 | |
| April 9, 2021, 1 p.m. | N/A | N/A | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.47 ppb (6) | 18.9 μg/m3 (18) | 7.6 μg/m3 (32) | 32.0 | |
| April 9, 2021, noon | N/A | N/A | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.53 ppb (6) | 18.2 μg/m3 (17) | 7.5 μg/m3 (32) | 32.0 | |
| April 9, 2021, 11 a.m. | N/A | N/A | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.49 ppb (6) | 16.1 μg/m3 (15) | 6.7 μg/m3 (28) | 28.0 | |
| April 9, 2021, 10 a.m. | N/A | N/A | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.5 ppb (6) | 13.8 μg/m3 (13) | 6.5 μg/m3 (28) | 28.0 | |
| April 9, 2021, 9 a.m. | N/A | N/A | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.3 ppb (4) | 9.7 μg/m3 (9) | 4.6 μg/m3 (20) | 20.0 | |
| April 9, 2021, 8 a.m. | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.22 ppb (3) | 9.7 μg/m3 (9) | 4.2 μg/m3 (18) | 18.0 | |
| April 9, 2021, 7 a.m. | N/A | N/A | N/A | 16.0 ppb (16) | N/A | N/A | N/A | N/A | 10.6 μg/m3 (10) | 4.4 μg/m3 (19) | 19.0 | |
| April 9, 2021, 6 a.m. | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.2 ppb (3) | 8.2 μg/m3 (8) | 3.9 μg/m3 (17) | 17.0 | |
| April 9, 2021, 5 a.m. | N/A | N/A | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.23 ppb (3) | 9.0 μg/m3 (9) | 3.8 μg/m3 (16) | 16.0 | |
| April 9, 2021, 4 a.m. | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.28 ppb (4) | 11.2 μg/m3 (11) | 4.0 μg/m3 (17) | 17.0 | |
| April 9, 2021, 3 a.m. | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.33 ppb (4) | 10.2 μg/m3 (10) | 3.9 μg/m3 (17) | 17.0 | |
| April 9, 2021, 2 a.m. | N/A | N/A | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.34 ppb (4) | 9.5 μg/m3 (9) | 3.9 μg/m3 (17) | 17.0 | |
| April 9, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.24 ppb (3) | 9.5 μg/m3 (9) | 3.6 μg/m3 (16) | 16.0 | |
| April 9, 2021, midnight | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.31 ppb (4) | 9.4 μg/m3 (9) | 3.8 μg/m3 (16) | 16.0 | |
| April 8, 2021, 11 p.m. | N/A | N/A | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.33 ppb (4) | 12.1 μg/m3 (12) | 4.0 μg/m3 (17) | 17.0 | |
| April 8, 2021, 10 p.m. | N/A | N/A | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.29 ppb (4) | 14.7 μg/m3 (14) | 4.2 μg/m3 (18) | 18.0 | |
| April 8, 2021, 9 p.m. | N/A | N/A | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.4 ppb (5) | 12.4 μg/m3 (12) | 4.3 μg/m3 (18) | 18.0 | |
| April 8, 2021, 8 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | 11.4 μg/m3 (11) | 3.9 μg/m3 (17) | 17.0 | |
| April 8, 2021, 7 p.m. | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.29 ppb (4) | 12.3 μg/m3 (12) | 3.9 μg/m3 (17) | 17.0 | |
| April 8, 2021, 6 p.m. | N/A | N/A | N/A | 12.0 ppb (12) | N/A | N/A | N/A | 0.28 ppb (4) | 12.5 μg/m3 (12) | 4.3 μg/m3 (18) | 18.0 | |
| April 8, 2021, 5 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.21 ppb (3) | 10.1 μg/m3 (10) | 3.6 μg/m3 (16) | 16.0 | |
| April 8, 2021, 4 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.19 ppb (3) | 9.5 μg/m3 (9) | 3.2 μg/m3 (14) | 14.0 | |
| April 8, 2021, 3 p.m. | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.3 ppb (4) | 15.6 μg/m3 (15) | 5.1 μg/m3 (22) | 22.0 | |
| April 8, 2021, 2 p.m. | N/A | N/A | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.36 ppb (5) | 16.1 μg/m3 (15) | 5.5 μg/m3 (23) | 23.0 | |
| April 8, 2021, 1 p.m. | N/A | N/A | N/A | 15.0 ppb (15) | N/A | N/A | N/A | 0.3 ppb (4) | 15.6 μg/m3 (15) | 6.6 μg/m3 (28) | 28.0 | |
| April 8, 2021, noon | N/A | N/A | N/A | 21.0 ppb (20) | N/A | N/A | N/A | 0.36 ppb (5) | 14.9 μg/m3 (14) | 6.7 μg/m3 (28) | 28.0 | |
| April 8, 2021, 11 a.m. | N/A | N/A | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.53 ppb (6) | 21.7 μg/m3 (21) | 7.5 μg/m3 (32) | 32.0 | |
| April 8, 2021, 10 a.m. | N/A | N/A | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.43 ppb (5) | 17.0 μg/m3 (16) | 6.2 μg/m3 (26) | 26.0 | |
| April 8, 2021, 9 a.m. | N/A | N/A | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.37 ppb (5) | 11.6 μg/m3 (11) | 5.7 μg/m3 (24) | 25.0 | |
| April 8, 2021, 8 a.m. | N/A | N/A | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.3 ppb (4) | 11.1 μg/m3 (11) | 5.3 μg/m3 (23) | 26.0 | |
| April 8, 2021, 7 a.m. | N/A | N/A | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | 12.9 μg/m3 (12) | 5.0 μg/m3 (21) | 27.0 | |
| April 8, 2021, 6 a.m. | N/A | N/A | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.29 ppb (4) | 10.2 μg/m3 (10) | 4.8 μg/m3 (20) | 20.0 | |
| April 8, 2021, 5 a.m. | N/A | N/A | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.27 ppb (4) | 9.3 μg/m3 (9) | 4.6 μg/m3 (20) | 20.0 | |
| April 8, 2021, 4 a.m. | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.33 ppb (4) | 10.3 μg/m3 (10) | 4.7 μg/m3 (20) | 20.0 | |
| April 8, 2021, 3 a.m. | N/A | N/A | N/A | 13.0 ppb (13) | N/A | N/A | N/A | 0.35 ppb (4) | 9.0 μg/m3 (9) | 4.1 μg/m3 (18) | 18.0 | |
| April 8, 2021, 2 a.m. | N/A | N/A | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.34 ppb (4) | 9.7 μg/m3 (9) | 4.0 μg/m3 (17) | 17.0 | |
| April 8, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.33 ppb (4) | 8.3 μg/m3 (8) | 4.0 μg/m3 (17) | 17.0 | |
| April 8, 2021, midnight | N/A | N/A | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.3 ppb (4) | 11.4 μg/m3 (11) | 4.1 μg/m3 (18) | 18.0 | |
| April 7, 2021, 11 p.m. | N/A | N/A | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.32 ppb (4) | 10.9 μg/m3 (11) | 3.8 μg/m3 (16) | 16.0 | |
| April 7, 2021, 10 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.21 ppb (3) | 6.2 μg/m3 (6) | 2.0 μg/m3 (9) | 9.0 | |
| April 7, 2021, 9 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.16 ppb (3) | 6.8 μg/m3 (7) | 2.7 μg/m3 (12) | 12.0 | |
| April 7, 2021, 8 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (3) | 8.1 μg/m3 (8) | 2.5 μg/m3 (11) | 11.0 | |
| April 7, 2021, 7 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.19 ppb (3) | 7.5 μg/m3 (7) | 2.7 μg/m3 (12) | 12.0 | |
| April 7, 2021, 6 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (3) | 10.7 μg/m3 (10) | 2.8 μg/m3 (12) | 12.0 | |
| April 7, 2021, 5 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 10.8 μg/m3 (10) | 2.6 μg/m3 (11) | 11.0 | |
| April 7, 2021, 4 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 8.2 μg/m3 (8) | 2.2 μg/m3 (10) | 10.0 | |
| April 7, 2021, 3 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 11.3 μg/m3 (11) | 2.4 μg/m3 (10) | 11.0 | |
| April 7, 2021, 2 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 9.3 μg/m3 (9) | 2.4 μg/m3 (10) | 10.0 | |
| April 7, 2021, 1 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (3) | 12.2 μg/m3 (12) | 2.6 μg/m3 (11) | 12.0 | |
| April 7, 2021, noon | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (3) | 10.3 μg/m3 (10) | 3.9 μg/m3 (17) | 17.0 | |
| April 7, 2021, 11 a.m. | N/A | N/A | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.46 ppb (6) | 12.2 μg/m3 (12) | 4.9 μg/m3 (21) | 21.0 | |
| April 7, 2021, 10 a.m. | N/A | N/A | N/A | 28.0 ppb (27) | N/A | N/A | N/A | 0.5 ppb (6) | 15.1 μg/m3 (14) | 5.9 μg/m3 (25) | 27.0 | |
| April 7, 2021, 9 a.m. | N/A | N/A | N/A | 28.0 ppb (27) | N/A | N/A | N/A | 0.46 ppb (6) | 11.5 μg/m3 (11) | 4.7 μg/m3 (20) | 27.0 | |
| April 7, 2021, 8 a.m. | N/A | N/A | N/A | 30.0 ppb (29) | N/A | N/A | N/A | 0.39 ppb (5) | 9.9 μg/m3 (10) | 4.6 μg/m3 (20) | 29.0 | |
| April 7, 2021, 7 a.m. | N/A | N/A | N/A | 32.0 ppb (31) | N/A | N/A | N/A | N/A | 12.7 μg/m3 (12) | 4.4 μg/m3 (19) | 31.0 | |
| April 7, 2021, 6 a.m. | N/A | N/A | N/A | 23.0 ppb (22) | N/A | N/A | N/A | 0.32 ppb (4) | 10.5 μg/m3 (10) | 4.2 μg/m3 (18) | 22.0 | |
| April 7, 2021, 5 a.m. | N/A | N/A | N/A | 16.0 ppb (16) | N/A | N/A | N/A | 0.24 ppb (3) | 9.2 μg/m3 (9) | 3.8 μg/m3 (16) | 16.0 | |
| April 7, 2021, 4 a.m. | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.22 ppb (3) | 7.1 μg/m3 (7) | 3.0 μg/m3 (13) | 13.0 | |
| April 7, 2021, 3 a.m. | N/A | N/A | N/A | 11.0 ppb (11) | N/A | N/A | N/A | 0.23 ppb (3) | 9.9 μg/m3 (10) | 4.1 μg/m3 (18) | 18.0 | |
| April 7, 2021, 2 a.m. | N/A | N/A | N/A | 10.0 ppb (10) | N/A | N/A | N/A | 0.21 ppb (3) | 8.6 μg/m3 (8) | 4.3 μg/m3 (18) | 18.0 | |
| April 7, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.31 ppb (4) | 9.8 μg/m3 (10) | 4.4 μg/m3 (19) | 19.0 | |
| April 7, 2021, midnight | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | 8.1 μg/m3 (8) | 3.2 μg/m3 (14) | 14.0 | |
| April 6, 2021, 11 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.1 ppb (2) | 8.1 μg/m3 (8) | 2.9 μg/m3 (13) | 13.0 | |
| April 6, 2021, 10 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.13 ppb (2) | 8.7 μg/m3 (9) | 2.4 μg/m3 (10) | 10.0 | |
| April 6, 2021, 9 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.14 ppb (2) | 9.8 μg/m3 (10) | 2.9 μg/m3 (13) | 13.0 | |
| April 6, 2021, 8 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.15 ppb (2) | 7.7 μg/m3 (8) | 3.0 μg/m3 (13) | 13.0 | |
| April 6, 2021, 7 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 10.7 μg/m3 (10) | 3.3 μg/m3 (14) | 14.0 | |
| April 6, 2021, 6 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 11.5 μg/m3 (11) | 3.4 μg/m3 (15) | 15.0 | |
| April 6, 2021, 5 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (3) | 10.5 μg/m3 (10) | 3.4 μg/m3 (15) | 15.0 | |
| April 6, 2021, 4 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 10.7 μg/m3 (10) | 3.4 μg/m3 (15) | 15.0 | |
| April 6, 2021, 3 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.15 ppb (2) | 10.9 μg/m3 (11) | 3.5 μg/m3 (15) | 15.0 | |
| April 6, 2021, 2 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.13 ppb (2) | 17.8 μg/m3 (17) | 4.0 μg/m3 (17) | 17.0 | |
| April 6, 2021, 1 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | 19.2 μg/m3 (18) | 4.2 μg/m3 (18) | 18.0 | |
| April 6, 2021, noon | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (3) | 10.1 μg/m3 (10) | 4.8 μg/m3 (20) | 20.0 | |
| April 6, 2021, 11 a.m. | N/A | N/A | N/A | 7.0 ppb (7) | N/A | N/A | N/A | 0.21 ppb (3) | 11.4 μg/m3 (11) | 5.7 μg/m3 (24) | 24.0 | |
| April 6, 2021, 10 a.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.21 ppb (3) | 11.2 μg/m3 (11) | 6.1 μg/m3 (26) | 26.0 | |
| April 6, 2021, 9 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.18 ppb (3) | 12.6 μg/m3 (12) | 6.6 μg/m3 (28) | 28.0 | |
| April 6, 2021, 8 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.16 ppb (3) | 12.7 μg/m3 (12) | 6.6 μg/m3 (28) | 28.0 | |
| April 6, 2021, 7 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | 13.9 μg/m3 (13) | 6.7 μg/m3 (28) | 28.0 | |
| April 6, 2021, 6 a.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 13.7 μg/m3 (13) | 7.0 μg/m3 (30) | 30.0 | |
| April 6, 2021, 5 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (3) | 12.7 μg/m3 (12) | 6.9 μg/m3 (29) | 29.0 | |
| April 6, 2021, 4 a.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.18 ppb (3) | 12.5 μg/m3 (12) | 7.3 μg/m3 (31) | 31.0 | |
| April 6, 2021, 3 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.18 ppb (3) | 12.7 μg/m3 (12) | 7.4 μg/m3 (31) | 31.0 | |
| April 6, 2021, 2 a.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 12.3 μg/m3 (12) | 7.2 μg/m3 (31) | 31.0 | |
| April 6, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.18 ppb (3) | 14.0 μg/m3 (13) | 6.9 μg/m3 (29) | 29.0 | |
| April 6, 2021, midnight | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.17 ppb (3) | 14.6 μg/m3 (14) | 6.8 μg/m3 (29) | 29.0 | |
| April 5, 2021, 11 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (3) | 14.1 μg/m3 (14) | 6.4 μg/m3 (27) | 27.0 | |
| April 5, 2021, 10 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 15.3 μg/m3 (15) | 6.3 μg/m3 (27) | 27.0 | |
| April 5, 2021, 9 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (3) | 19.5 μg/m3 (19) | 6.4 μg/m3 (27) | 27.0 | |
| April 5, 2021, 8 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 23.6 μg/m3 (22) | 6.8 μg/m3 (29) | 29.0 | |
| April 5, 2021, 7 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.18 ppb (3) | 30.1 μg/m3 (28) | 7.5 μg/m3 (32) | 32.0 | |
| April 5, 2021, 6 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (3) | 37.4 μg/m3 (35) | 8.4 μg/m3 (36) | 36.0 | |
| April 5, 2021, 5 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (3) | 23.4 μg/m3 (22) | 8.3 μg/m3 (35) | 35.0 | |
| April 5, 2021, 4 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (3) | 14.5 μg/m3 (14) | 8.0 μg/m3 (34) | 34.0 | |
| April 5, 2021, 3 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.2 ppb (3) | 20.4 μg/m3 (19) | 8.9 μg/m3 (38) | 38.0 | |
| April 5, 2021, 2 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (3) | 19.8 μg/m3 (19) | 8.9 μg/m3 (38) | 38.0 | |
| April 5, 2021, 1 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.2 ppb (3) | 18.8 μg/m3 (18) | 8.5 μg/m3 (36) | 36.0 | |
| April 5, 2021, noon | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (3) | 15.3 μg/m3 (15) | 9.0 μg/m3 (38) | 38.0 | |
| April 5, 2021, 11 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.21 ppb (3) | 15.2 μg/m3 (15) | 8.9 μg/m3 (38) | 38.0 | |
| April 5, 2021, 10 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.2 ppb (3) | 13.8 μg/m3 (13) | 7.9 μg/m3 (33) | 33.0 | |
| April 5, 2021, 9 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (3) | 14.5 μg/m3 (14) | 7.9 μg/m3 (33) | 33.0 | |
| April 5, 2021, 8 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.19 ppb (3) | 16.0 μg/m3 (15) | 8.0 μg/m3 (34) | 34.0 | |
| April 5, 2021, 7 a.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | 15.0 μg/m3 (14) | 7.4 μg/m3 (31) | 31.0 | |
| April 5, 2021, 6 a.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 13.7 μg/m3 (13) | 7.2 μg/m3 (31) | 31.0 | |
| April 5, 2021, 5 a.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 13.8 μg/m3 (13) | 7.0 μg/m3 (30) | 30.0 | |
| April 5, 2021, 4 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.19 ppb (3) | 13.0 μg/m3 (13) | 6.8 μg/m3 (29) | 29.0 | |
| April 5, 2021, 3 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.22 ppb (3) | 14.6 μg/m3 (14) | 7.2 μg/m3 (31) | 31.0 | |
| April 5, 2021, 2 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.21 ppb (3) | 15.7 μg/m3 (15) | 7.8 μg/m3 (33) | 33.0 | |
| April 5, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.33 ppb (4) | 15.9 μg/m3 (15) | 8.2 μg/m3 (35) | 35.0 | |
| April 5, 2021, midnight | N/A | N/A | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.32 ppb (4) | 15.3 μg/m3 (15) | 7.9 μg/m3 (33) | 33.0 | |
| April 4, 2021, 11 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | 15.0 μg/m3 (14) | 7.6 μg/m3 (32) | 32.0 | |
| April 4, 2021, 10 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.2 ppb (3) | 17.4 μg/m3 (17) | 7.4 μg/m3 (31) | 31.0 | |
| April 4, 2021, 9 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (3) | 15.6 μg/m3 (15) | 7.7 μg/m3 (33) | 33.0 | |
| April 4, 2021, 8 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.18 ppb (3) | 17.7 μg/m3 (17) | 9.0 μg/m3 (38) | 38.0 | |
| April 4, 2021, 7 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (3) | 13.7 μg/m3 (13) | 7.4 μg/m3 (31) | 31.0 | |
| April 4, 2021, 6 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (3) | 13.3 μg/m3 (13) | 6.9 μg/m3 (29) | 29.0 | |
| April 4, 2021, 5 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.32 ppb (4) | 12.1 μg/m3 (12) | 5.3 μg/m3 (23) | 23.0 | |
| April 4, 2021, 4 p.m. | N/A | N/A | N/A | 9.0 ppb (9) | N/A | N/A | N/A | 0.34 ppb (4) | 11.8 μg/m3 (11) | 5.9 μg/m3 (25) | 25.0 | |
| April 4, 2021, 3 p.m. | N/A | N/A | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.45 ppb (6) | 12.5 μg/m3 (12) | 7.5 μg/m3 (32) | 32.0 | |
| April 4, 2021, 2 p.m. | N/A | N/A | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.46 ppb (6) | 15.2 μg/m3 (15) | 9.8 μg/m3 (41) | 41.0 | |
| April 4, 2021, 1 p.m. | N/A | N/A | N/A | 17.0 ppb (17) | N/A | N/A | N/A | 0.44 ppb (5) | 16.5 μg/m3 (16) | 11.5 μg/m3 (48) | 48.0 | |
| April 4, 2021, noon | N/A | N/A | N/A | 22.0 ppb (21) | N/A | N/A | N/A | 0.53 ppb (6) | 18.4 μg/m3 (18) | 13.2 μg/m3 (54) | 54.0 | |
| April 4, 2021, 11 a.m. | N/A | N/A | N/A | 25.0 ppb (24) | N/A | N/A | N/A | 0.69 ppb (8) | 17.7 μg/m3 (17) | 11.7 μg/m3 (49) | 49.0 | |
| April 4, 2021, 10 a.m. | N/A | N/A | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.76 ppb (10) | 18.5 μg/m3 (18) | 12.7 μg/m3 (53) | 53.0 | |
| April 4, 2021, 9 a.m. | N/A | N/A | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.7 ppb (8) | 19.5 μg/m3 (19) | 13.4 μg/m3 (54) | 54.0 | |
| April 4, 2021, 8 a.m. | N/A | N/A | N/A | 27.0 ppb (26) | N/A | N/A | N/A | 0.66 ppb (8) | 20.5 μg/m3 (19) | 13.7 μg/m3 (55) | 55.0 | |
| April 4, 2021, 7 a.m. | N/A | N/A | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | 20.6 μg/m3 (20) | 14.1 μg/m3 (56) | 56.0 | |
| April 4, 2021, 6 a.m. | N/A | N/A | N/A | 28.0 ppb (27) | N/A | N/A | N/A | 0.69 ppb (8) | 22.5 μg/m3 (21) | 14.8 μg/m3 (57) | 57.0 | |
| April 4, 2021, 5 a.m. | N/A | N/A | N/A | 33.0 ppb (32) | N/A | N/A | N/A | 1.0 ppb (12) | 20.8 μg/m3 (20) | 13.1 μg/m3 (54) | 54.0 | |
| April 4, 2021, 4 a.m. | N/A | N/A | N/A | 35.0 ppb (34) | N/A | N/A | N/A | 1.06 ppb (13) | 21.8 μg/m3 (21) | 12.6 μg/m3 (53) | 53.0 | |
| April 4, 2021, 3 a.m. | N/A | N/A | N/A | 35.0 ppb (34) | N/A | N/A | N/A | 0.67 ppb (8) | 15.1 μg/m3 (14) | 9.5 μg/m3 (40) | 40.0 | |
| April 4, 2021, 2 a.m. | N/A | N/A | N/A | 33.0 ppb (32) | N/A | N/A | N/A | 0.5 ppb (6) | 16.1 μg/m3 (15) | 10.4 μg/m3 (44) | 44.0 | |
| April 4, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (5) | 12.7 μg/m3 (12) | 6.5 μg/m3 (28) | 28.0 | |
| April 4, 2021, midnight | N/A | N/A | N/A | 14.0 ppb (14) | N/A | N/A | N/A | 0.34 ppb (4) | 8.8 μg/m3 (9) | 4.7 μg/m3 (20) | 20.0 | |
| April 3, 2021, 11 p.m. | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (3) | 7.0 μg/m3 (7) | 3.7 μg/m3 (16) | 16.0 | |
| April 3, 2021, 10 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 6.0 μg/m3 (6) | 3.3 μg/m3 (14) | 14.0 | |
| April 3, 2021, 9 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 7.0 μg/m3 (7) | 3.2 μg/m3 (14) | 14.0 | |
| April 3, 2021, 8 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (3) | 7.0 μg/m3 (7) | 3.2 μg/m3 (14) | 14.0 | |
| April 3, 2021, 7 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (3) | 7.1 μg/m3 (7) | 3.4 μg/m3 (15) | 15.0 | |
| April 3, 2021, 6 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (3) | 7.3 μg/m3 (7) | 3.4 μg/m3 (15) | 15.0 | |
| April 3, 2021, 5 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (3) | 6.6 μg/m3 (7) | 3.4 μg/m3 (15) | 15.0 | |
| April 3, 2021, 4 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 6.6 μg/m3 (7) | 3.5 μg/m3 (15) | 15.0 | |
| April 3, 2021, 3 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.14 ppb (2) | 7.2 μg/m3 (7) | 3.3 μg/m3 (14) | 14.0 | |
| April 3, 2021, 2 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.14 ppb (2) | 7.0 μg/m3 (7) | 3.3 μg/m3 (14) | 14.0 | |
| April 3, 2021, 1 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (3) | 7.7 μg/m3 (8) | 3.6 μg/m3 (16) | 16.0 | |
| April 3, 2021, noon | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (3) | 7.6 μg/m3 (8) | 4.0 μg/m3 (17) | 17.0 | |
| April 3, 2021, 11 a.m. | N/A | N/A | N/A | 28.0 ppb (27) | N/A | N/A | N/A | 0.51 ppb (6) | 11.2 μg/m3 (11) | 5.1 μg/m3 (22) | 27.0 | |
| April 3, 2021, 10 a.m. | N/A | N/A | N/A | 26.0 ppb (25) | N/A | N/A | N/A | 0.39 ppb (5) | 9.7 μg/m3 (9) | 4.5 μg/m3 (19) | 25.0 |