Bismarck (Bismarck Cathedral Area Historic Dist) ND, US: 46.8253, -100.7681
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 18, 2021, 1 a.m. | 6.0 ppb (6) | 0.3 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.17 ppb (3) | 12.4 μg/m3 (12) | 4.8 μg/m3 (20) | 38.0 | |
| April 18, 2021, midnight | 4.0 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.15 ppb (2) | 12.2 μg/m3 (12) | 5.0 μg/m3 (21) | 41.0 | |
| April 17, 2021, 11 p.m. | 3.3 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.14 ppb (2) | 10.8 μg/m3 (10) | 4.8 μg/m3 (20) | 43.0 | |
| April 17, 2021, 10 p.m. | 3.2 ppb (4) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.14 ppb (2) | 10.1 μg/m3 (10) | 4.6 μg/m3 (20) | 42.0 | |
| April 17, 2021, 9 p.m. | 4.4 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | 44.0 ppb (41) | 0.14 ppb (2) | 14.8 μg/m3 (14) | 7.5 μg/m3 (32) | 41.0 | |
| April 17, 2021, 8 p.m. | 4.6 ppb (5) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | 43.0 ppb (40) | 0.14 ppb (2) | 13.5 μg/m3 (13) | 6.9 μg/m3 (29) | 40.0 | |
| April 17, 2021, 7 p.m. | 3.7 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | 44.0 ppb (41) | 0.13 ppb (2) | 12.4 μg/m3 (12) | 5.9 μg/m3 (25) | 41.0 | |
| April 17, 2021, 6 p.m. | 4.3 ppb (5) | 1.2 ppb (2) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 42.0 ppb (39) | 0.14 ppb (2) | 11.2 μg/m3 (11) | 5.1 μg/m3 (22) | 39.0 | |
| April 17, 2021, 5 p.m. | 3.1 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (38) | 0.14 ppb (2) | 10.9 μg/m3 (11) | 4.7 μg/m3 (20) | 38.0 | |
| April 17, 2021, 4 p.m. | 3.2 ppb (4) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 35.0 ppb (33) | 0.14 ppb (2) | 13.8 μg/m3 (13) | 5.2 μg/m3 (22) | 33.0 | |
| April 17, 2021, 3 p.m. | 4.9 ppb (5) | 1.4 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.16 ppb (3) | 13.2 μg/m3 (13) | 6.9 μg/m3 (29) | 29.0 | |
| April 17, 2021, 2 p.m. | 5.5 ppb (6) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.16 ppb (3) | 13.6 μg/m3 (13) | 7.6 μg/m3 (32) | 32.0 | |
| April 17, 2021, 1 p.m. | 6.3 ppb (6) | 1.6 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.18 ppb (3) | 12.0 μg/m3 (12) | 7.8 μg/m3 (33) | 33.0 | |
| April 17, 2021, noon | 8.0 ppb (8) | 1.3 ppb (2) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 18.0 ppb (17) | 0.18 ppb (3) | 11.3 μg/m3 (11) | 8.0 μg/m3 (34) | 34.0 | |
| April 17, 2021, 11 a.m. | 6.8 ppb (7) | 0.7 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.15 ppb (2) | 11.9 μg/m3 (12) | 8.1 μg/m3 (34) | 34.0 | |
| April 17, 2021, 10 a.m. | 6.8 ppb (7) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.15 ppb (2) | 12.2 μg/m3 (12) | 8.8 μg/m3 (37) | 37.0 | |
| April 17, 2021, 9 a.m. | 7.5 ppb (8) | 0.5 ppb (1) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.14 ppb (2) | 12.5 μg/m3 (12) | 9.0 μg/m3 (38) | 38.0 | |
| April 17, 2021, 8 a.m. | 6.7 ppb (7) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.14 ppb (2) | 14.4 μg/m3 (14) | 9.6 μg/m3 (40) | 40.0 | |
| April 17, 2021, 7 a.m. | 6.9 ppb (7) | 0.4 ppb (1) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 18.0 ppb (17) | 0.15 ppb (2) | 12.1 μg/m3 (12) | 9.0 μg/m3 (38) | 38.0 | |
| April 17, 2021, 6 a.m. | 6.0 ppb (6) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.15 ppb (2) | 11.8 μg/m3 (11) | 8.4 μg/m3 (36) | 36.0 | |
| April 17, 2021, 5 a.m. | 6.2 ppb (6) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.16 ppb (3) | 12.3 μg/m3 (12) | 8.4 μg/m3 (36) | 36.0 | |
| April 17, 2021, 4 a.m. | 7.4 ppb (7) | 0.5 ppb (1) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.2 ppb (3) | 13.2 μg/m3 (13) | 8.4 μg/m3 (36) | 36.0 | |
| April 17, 2021, 3 a.m. | 11.5 ppb (11) | 0.7 ppb (1) | N/A | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | N/A | 14.0 μg/m3 (13) | 8.3 μg/m3 (35) | 35.0 | |
| April 17, 2021, 2 a.m. | 4.9 ppb (5) | 0.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | N/A | 12.7 μg/m3 (12) | 7.7 μg/m3 (33) | 33.0 | |
| April 17, 2021, 1 a.m. | 4.8 ppb (5) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.17 ppb (3) | 14.0 μg/m3 (13) | 8.7 μg/m3 (37) | 37.0 | |
| April 17, 2021, midnight | 5.4 ppb (6) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.17 ppb (3) | 11.8 μg/m3 (11) | 7.5 μg/m3 (32) | 32.0 | |
| April 16, 2021, 11 p.m. | 4.1 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.16 ppb (3) | 13.0 μg/m3 (13) | 7.9 μg/m3 (33) | 33.0 | |
| April 16, 2021, 10 p.m. | 4.5 ppb (5) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.17 ppb (3) | 13.5 μg/m3 (13) | 8.0 μg/m3 (34) | 34.0 | |
| April 16, 2021, 9 p.m. | 4.8 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.17 ppb (3) | 10.6 μg/m3 (10) | 5.9 μg/m3 (25) | 26.0 | |
| April 16, 2021, 8 p.m. | 3.9 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.16 ppb (3) | 9.2 μg/m3 (9) | 5.2 μg/m3 (22) | 26.0 | |
| April 16, 2021, 7 p.m. | 4.3 ppb (5) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.16 ppb (3) | 9.5 μg/m3 (9) | 5.6 μg/m3 (24) | 25.0 | |
| April 16, 2021, 6 p.m. | 5.0 ppb (5) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.16 ppb (3) | 10.8 μg/m3 (10) | 7.4 μg/m3 (31) | 31.0 | |
| April 16, 2021, 5 p.m. | 3.9 ppb (4) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.17 ppb (3) | 12.5 μg/m3 (12) | 8.8 μg/m3 (37) | 37.0 | |
| April 16, 2021, 4 p.m. | 4.6 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.17 ppb (3) | 13.8 μg/m3 (13) | 9.7 μg/m3 (41) | 41.0 | |
| April 16, 2021, 3 p.m. | 6.1 ppb (6) | 1.4 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.18 ppb (3) | 19.2 μg/m3 (18) | 13.1 μg/m3 (54) | 54.0 | |
| April 16, 2021, 2 p.m. | 6.0 ppb (6) | 1.1 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.19 ppb (3) | 19.4 μg/m3 (18) | 14.2 μg/m3 (56) | 56.0 | |
| April 16, 2021, 1 p.m. | 6.4 ppb (7) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.18 ppb (3) | 22.1 μg/m3 (21) | 16.7 μg/m3 (61) | 61.0 | |
| April 16, 2021, noon | 7.6 ppb (8) | 1.1 ppb (2) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.18 ppb (3) | 27.2 μg/m3 (26) | 19.9 μg/m3 (68) | 68.0 | |
| April 16, 2021, 11 a.m. | 5.8 ppb (6) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.17 ppb (3) | 26.8 μg/m3 (25) | 19.7 μg/m3 (67) | 67.0 | |
| April 16, 2021, 10 a.m. | 6.3 ppb (6) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.16 ppb (3) | 21.6 μg/m3 (20) | 17.1 μg/m3 (62) | 62.0 | |
| April 16, 2021, 9 a.m. | 4.4 ppb (5) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.16 ppb (3) | 19.2 μg/m3 (18) | 15.7 μg/m3 (59) | 59.0 | |
| April 16, 2021, 8 a.m. | 4.7 ppb (5) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.16 ppb (3) | 15.9 μg/m3 (15) | 13.4 μg/m3 (54) | 54.0 | |
| April 16, 2021, 7 a.m. | 4.2 ppb (4) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.17 ppb (3) | 16.8 μg/m3 (16) | 13.7 μg/m3 (55) | 55.0 | |
| April 16, 2021, 6 a.m. | 3.9 ppb (4) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.15 ppb (2) | 16.4 μg/m3 (16) | 12.9 μg/m3 (53) | 53.0 | |
| April 16, 2021, 5 a.m. | 4.8 ppb (5) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 25.0 ppb (24) | 0.15 ppb (2) | 19.0 μg/m3 (18) | 15.6 μg/m3 (59) | 59.0 | |
| April 16, 2021, 4 a.m. | 6.1 ppb (6) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | 3.0 ppb (5) | 23.0 ppb (22) | 0.16 ppb (3) | 22.7 μg/m3 (22) | 18.7 μg/m3 (65) | 65.0 | |
| April 16, 2021, 3 a.m. | 6.0 ppb (6) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | 3.0 ppb (5) | 24.0 ppb (23) | N/A | 22.7 μg/m3 (22) | 18.5 μg/m3 (65) | 65.0 | |
| April 16, 2021, 2 a.m. | 4.3 ppb (5) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 26.0 ppb (25) | N/A | 23.8 μg/m3 (23) | 19.7 μg/m3 (67) | 67.0 | |
| April 16, 2021, 1 a.m. | 3.5 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.16 ppb (3) | 21.8 μg/m3 (21) | 17.3 μg/m3 (62) | 62.0 | |
| April 16, 2021, midnight | 3.2 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.18 ppb (3) | 19.6 μg/m3 (19) | 14.4 μg/m3 (56) | 56.0 | |
| April 15, 2021, 11 p.m. | 3.3 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.18 ppb (3) | 18.8 μg/m3 (18) | 12.1 μg/m3 (51) | 51.0 | |
| April 15, 2021, 10 p.m. | 3.6 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.16 ppb (3) | 15.8 μg/m3 (15) | 9.8 μg/m3 (41) | 41.0 | |
| April 15, 2021, 9 p.m. | 4.1 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.17 ppb (3) | 16.6 μg/m3 (16) | 9.2 μg/m3 (39) | 39.0 | |
| April 15, 2021, 8 p.m. | 3.7 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.16 ppb (3) | 16.8 μg/m3 (16) | 9.3 μg/m3 (39) | 39.0 | |
| April 15, 2021, 7 p.m. | 4.0 ppb (4) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.16 ppb (3) | 18.3 μg/m3 (17) | 10.3 μg/m3 (43) | 43.0 | |
| April 15, 2021, 6 p.m. | 4.5 ppb (5) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.16 ppb (3) | 14.3 μg/m3 (14) | 8.9 μg/m3 (38) | 38.0 | |
| April 15, 2021, 5 p.m. | 3.8 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.15 ppb (2) | 15.4 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| April 15, 2021, 4 p.m. | 4.2 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.16 ppb (3) | 18.2 μg/m3 (17) | 10.9 μg/m3 (46) | 46.0 | |
| April 15, 2021, 3 p.m. | 5.1 ppb (5) | 1.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.17 ppb (3) | 19.3 μg/m3 (18) | 11.5 μg/m3 (48) | 48.0 | |
| April 15, 2021, 2 p.m. | 4.9 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.17 ppb (3) | 17.9 μg/m3 (17) | 10.5 μg/m3 (44) | 44.0 | |
| April 15, 2021, 1 p.m. | 5.5 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.18 ppb (3) | 17.0 μg/m3 (16) | 9.9 μg/m3 (42) | 42.0 | |
| April 15, 2021, noon | 5.4 ppb (6) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.18 ppb (3) | 15.0 μg/m3 (14) | 9.6 μg/m3 (40) | 40.0 | |
| April 15, 2021, 11 a.m. | 4.2 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.17 ppb (3) | 14.0 μg/m3 (13) | 8.8 μg/m3 (37) | 37.0 | |
| April 15, 2021, 10 a.m. | 3.5 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.15 ppb (2) | 12.0 μg/m3 (12) | 7.5 μg/m3 (32) | 32.0 | |
| April 15, 2021, 9 a.m. | 2.4 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.15 ppb (2) | 11.4 μg/m3 (11) | 7.6 μg/m3 (32) | 32.0 | |
| April 15, 2021, 8 a.m. | 2.5 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.16 ppb (3) | 13.6 μg/m3 (13) | 10.1 μg/m3 (43) | 43.0 | |
| April 15, 2021, 7 a.m. | 1.9 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.15 ppb (2) | 13.5 μg/m3 (13) | 10.9 μg/m3 (46) | 46.0 | |
| April 15, 2021, 6 a.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.15 ppb (2) | 11.6 μg/m3 (11) | 8.8 μg/m3 (37) | 37.0 | |
| April 15, 2021, 5 a.m. | 2.4 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.15 ppb (2) | 9.7 μg/m3 (9) | 6.6 μg/m3 (28) | 28.0 | |
| April 15, 2021, 4 a.m. | 2.8 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.16 ppb (3) | 10.5 μg/m3 (10) | 6.2 μg/m3 (26) | 26.0 | |
| April 15, 2021, 3 a.m. | 3.6 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | 10.3 μg/m3 (10) | 6.4 μg/m3 (27) | 27.0 | |
| April 15, 2021, 2 a.m. | 4.2 ppb (4) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | N/A | 9.9 μg/m3 (10) | 6.6 μg/m3 (28) | 28.0 | |
| April 15, 2021, 1 a.m. | 3.8 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.15 ppb (2) | 8.8 μg/m3 (9) | 5.1 μg/m3 (22) | 26.0 | |
| April 15, 2021, midnight | 3.7 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.15 ppb (2) | 7.6 μg/m3 (8) | 4.1 μg/m3 (18) | 25.0 | |
| April 14, 2021, 11 p.m. | 2.9 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.15 ppb (2) | 6.7 μg/m3 (7) | 3.4 μg/m3 (15) | 25.0 | |
| April 14, 2021, 10 p.m. | 2.4 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.15 ppb (2) | 5.6 μg/m3 (6) | 3.3 μg/m3 (14) | 26.0 | |
| April 14, 2021, 9 p.m. | 2.6 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.14 ppb (2) | 6.5 μg/m3 (7) | 3.5 μg/m3 (15) | 27.0 | |
| April 14, 2021, 8 p.m. | 2.4 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.14 ppb (2) | 4.9 μg/m3 (5) | 2.9 μg/m3 (13) | 27.0 | |
| April 14, 2021, 7 p.m. | 2.2 ppb (3) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.14 ppb (2) | 5.1 μg/m3 (5) | 2.9 μg/m3 (13) | 27.0 | |
| April 14, 2021, 6 p.m. | 2.4 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.14 ppb (2) | 5.7 μg/m3 (6) | 2.7 μg/m3 (12) | 27.0 | |
| April 14, 2021, 5 p.m. | 2.3 ppb (3) | 0.9 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.14 ppb (2) | 4.6 μg/m3 (5) | 2.5 μg/m3 (11) | 28.0 | |
| April 14, 2021, 4 p.m. | 2.6 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.14 ppb (2) | 6.4 μg/m3 (6) | 2.9 μg/m3 (13) | 28.0 | |
| April 14, 2021, 3 p.m. | 3.2 ppb (4) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.14 ppb (2) | 7.0 μg/m3 (7) | 3.4 μg/m3 (15) | 27.0 | |
| April 14, 2021, 2 p.m. | 3.3 ppb (4) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.16 ppb (3) | 7.1 μg/m3 (7) | 3.4 μg/m3 (15) | 27.0 | |
| April 14, 2021, 1 p.m. | 4.7 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.16 ppb (3) | 8.2 μg/m3 (8) | 3.6 μg/m3 (16) | 26.0 | |
| April 14, 2021, noon | 5.6 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.16 ppb (3) | 7.5 μg/m3 (7) | 3.5 μg/m3 (15) | 25.0 | |
| April 14, 2021, 11 a.m. | 3.6 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.15 ppb (2) | 5.8 μg/m3 (6) | 3.1 μg/m3 (13) | 27.0 | |
| April 14, 2021, 10 a.m. | 2.5 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.14 ppb (2) | 4.8 μg/m3 (5) | 2.8 μg/m3 (12) | 28.0 | |
| April 14, 2021, 9 a.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.14 ppb (2) | 6.1 μg/m3 (6) | 2.9 μg/m3 (13) | 28.0 | |
| April 14, 2021, 8 a.m. | 1.9 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.14 ppb (2) | 5.1 μg/m3 (5) | 2.5 μg/m3 (11) | 28.0 | |
| April 14, 2021, 7 a.m. | 2.2 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.14 ppb (2) | 5.5 μg/m3 (6) | 2.9 μg/m3 (13) | 27.0 | |
| April 14, 2021, 6 a.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.14 ppb (2) | 4.7 μg/m3 (5) | 2.6 μg/m3 (11) | 28.0 | |
| April 14, 2021, 5 a.m. | 2.1 ppb (2) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.14 ppb (2) | 3.7 μg/m3 (4) | 2.0 μg/m3 (9) | 29.0 | |
| April 14, 2021, 4 a.m. | 2.5 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.14 ppb (2) | 4.0 μg/m3 (4) | 2.2 μg/m3 (10) | 29.0 | |
| April 14, 2021, 3 a.m. | 2.6 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | N/A | 4.6 μg/m3 (5) | 2.3 μg/m3 (10) | 29.0 | |
| April 14, 2021, 2 a.m. | 2.7 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | N/A | 5.6 μg/m3 (6) | 2.7 μg/m3 (12) | 30.0 | |
| April 14, 2021, 1 a.m. | 3.2 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.18 ppb (3) | 7.2 μg/m3 (7) | 3.7 μg/m3 (16) | 29.0 | |
| April 14, 2021, midnight | 3.8 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.18 ppb (3) | 8.7 μg/m3 (9) | 5.4 μg/m3 (23) | 29.0 | |
| April 13, 2021, 11 p.m. | 3.1 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 7.2 μg/m3 (7) | 3.6 μg/m3 (16) | 29.0 | |
| April 13, 2021, 10 p.m. | 3.3 ppb (4) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.18 ppb (3) | 7.9 μg/m3 (8) | 3.4 μg/m3 (15) | 29.0 | |
| April 13, 2021, 9 p.m. | 3.1 ppb (3) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 7.7 μg/m3 (8) | 3.1 μg/m3 (13) | 29.0 | |
| April 13, 2021, 8 p.m. | 3.0 ppb (3) | 1.2 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.17 ppb (3) | 9.7 μg/m3 (9) | 3.3 μg/m3 (14) | 30.0 | |
| April 13, 2021, 7 p.m. | 3.4 ppb (4) | 1.3 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 9.6 μg/m3 (9) | 3.5 μg/m3 (15) | 29.0 | |
| April 13, 2021, 6 p.m. | 2.4 ppb (3) | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.16 ppb (3) | 9.3 μg/m3 (9) | 2.0 μg/m3 (9) | 29.0 | |
| April 13, 2021, 5 p.m. | 2.8 ppb (3) | 1.2 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 7.8 μg/m3 (8) | 1.9 μg/m3 (8) | 29.0 | |
| April 13, 2021, 4 p.m. | 2.9 ppb (3) | 1.2 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 12.9 μg/m3 (12) | 1.8 μg/m3 (8) | 29.0 | |
| April 13, 2021, 3 p.m. | 3.3 ppb (4) | 1.4 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 7.3 μg/m3 (7) | 2.5 μg/m3 (11) | 29.0 | |
| April 13, 2021, 2 p.m. | 3.0 ppb (3) | 1.2 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 5.3 μg/m3 (5) | 2.0 μg/m3 (9) | 29.0 | |
| April 13, 2021, 1 p.m. | 3.2 ppb (4) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.17 ppb (3) | 4.6 μg/m3 (5) | 1.6 μg/m3 (7) | 28.0 | |
| April 13, 2021, noon | 3.1 ppb (3) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | 5.9 μg/m3 (6) | 1.8 μg/m3 (8) | 29.0 | |
| April 13, 2021, 11 a.m. | 2.7 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.16 ppb (3) | 6.5 μg/m3 (7) | 1.8 μg/m3 (8) | 29.0 | |
| April 13, 2021, 10 a.m. | 2.1 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.16 ppb (3) | 12.2 μg/m3 (12) | 2.2 μg/m3 (10) | 30.0 | |
| April 13, 2021, 9 a.m. | 2.1 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.15 ppb (2) | 12.0 μg/m3 (12) | 2.5 μg/m3 (11) | 30.0 | |
| April 13, 2021, 8 a.m. | 1.9 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.15 ppb (2) | 5.6 μg/m3 (6) | 1.8 μg/m3 (8) | 29.0 | |
| April 13, 2021, 7 a.m. | 2.4 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.15 ppb (2) | 4.1 μg/m3 (4) | 1.7 μg/m3 (8) | 29.0 | |
| April 13, 2021, 6 a.m. | 2.4 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.17 ppb (3) | 6.8 μg/m3 (7) | 1.3 μg/m3 (6) | 28.0 | |
| April 13, 2021, 5 a.m. | 1.9 ppb (2) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.16 ppb (3) | 7.9 μg/m3 (8) | 1.1 μg/m3 (5) | 28.0 | |
| April 13, 2021, 4 a.m. | 2.3 ppb (3) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.17 ppb (3) | 6.0 μg/m3 (6) | 0.8 μg/m3 (4) | 28.0 | |
| April 13, 2021, 3 a.m. | 2.7 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | N/A | 8.6 μg/m3 (8) | 3.0 μg/m3 (13) | 28.0 | |
| April 13, 2021, 2 a.m. | 3.1 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | N/A | 7.5 μg/m3 (7) | 3.2 μg/m3 (14) | 28.0 | |
| April 13, 2021, 1 a.m. | 2.5 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.15 ppb (2) | 8.5 μg/m3 (8) | 3.8 μg/m3 (16) | 29.0 | |
| April 13, 2021, midnight | 2.3 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.15 ppb (2) | 10.8 μg/m3 (10) | 4.8 μg/m3 (20) | 31.0 | |
| April 12, 2021, 11 p.m. | 2.6 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.15 ppb (2) | 13.2 μg/m3 (13) | 5.9 μg/m3 (25) | 30.0 | |
| April 12, 2021, 10 p.m. | 3.1 ppb (3) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.16 ppb (3) | 13.1 μg/m3 (13) | 5.4 μg/m3 (23) | 28.0 | |
| April 12, 2021, 9 p.m. | 2.9 ppb (3) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.15 ppb (2) | 9.3 μg/m3 (9) | 4.8 μg/m3 (20) | 28.0 | |
| April 12, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (27) | N/A | 9.6 μg/m3 (9) | 5.1 μg/m3 (22) | 27.0 | |
| April 12, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (25) | N/A | 7.0 μg/m3 (7) | 4.3 μg/m3 (18) | 25.0 | |
| April 12, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 5.7 μg/m3 (6) | 2.9 μg/m3 (13) | 13.0 | |
| April 12, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 4.9 μg/m3 (5) | 2.3 μg/m3 (10) | 10.0 | |
| April 12, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.16 ppb (3) | 5.5 μg/m3 (6) | 3.2 μg/m3 (14) | 23.0 | |
| April 12, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.16 ppb (3) | 3.9 μg/m3 (4) | 1.4 μg/m3 (6) | 20.0 | |
| April 12, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | 0.15 ppb (2) | 1.2 μg/m3 (2) | 0.9 μg/m3 (4) | 21.0 | |
| April 12, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | 0.16 ppb (3) | N/A | N/A | 18.0 | |
| April 12, 2021, noon | 5.3 ppb (5) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 13.0 ppb (13) | 0.17 ppb (3) | 6.4 μg/m3 (6) | 4.6 μg/m3 (20) | 20.0 | |
| April 12, 2021, 11 a.m. | 4.2 ppb (4) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 15.0 ppb (14) | 0.16 ppb (3) | 9.2 μg/m3 (9) | 4.2 μg/m3 (18) | 18.0 | |
| April 12, 2021, 10 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.15 ppb (2) | 3.3 μg/m3 (4) | 1.8 μg/m3 (8) | 18.0 | |
| April 12, 2021, 9 a.m. | 2.5 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | 20.0 ppb (19) | 0.14 ppb (2) | 3.3 μg/m3 (4) | 1.5 μg/m3 (7) | 19.0 | |
| April 12, 2021, 8 a.m. | 2.5 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | 21.0 ppb (20) | 0.14 ppb (2) | 3.3 μg/m3 (4) | 1.3 μg/m3 (6) | 20.0 | |
| April 12, 2021, 7 a.m. | 3.4 ppb (4) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 20.0 ppb (19) | 0.14 ppb (2) | 2.5 μg/m3 (3) | 0.8 μg/m3 (4) | 19.0 | |
| April 12, 2021, 6 a.m. | 4.1 ppb (4) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 20.0 ppb (19) | 0.14 ppb (2) | 4.6 μg/m3 (5) | 1.6 μg/m3 (7) | 19.0 | |
| April 12, 2021, 5 a.m. | 2.3 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.15 ppb (2) | 6.9 μg/m3 (7) | 2.3 μg/m3 (10) | 21.0 | |
| April 12, 2021, 4 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 22.0 ppb (21) | 0.15 ppb (2) | 7.4 μg/m3 (7) | 3.3 μg/m3 (14) | 21.0 | |
| April 12, 2021, 3 a.m. | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | N/A | 7.5 μg/m3 (7) | 3.6 μg/m3 (16) | 22.0 | |
| April 12, 2021, 2 a.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | N/A | 9.3 μg/m3 (9) | 3.9 μg/m3 (17) | 24.0 | |
| April 12, 2021, 1 a.m. | 1.9 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.15 ppb (2) | 8.6 μg/m3 (8) | 4.2 μg/m3 (18) | 25.0 | |
| April 12, 2021, midnight | 2.2 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.15 ppb (2) | 7.6 μg/m3 (8) | 4.1 μg/m3 (18) | 24.0 | |
| April 11, 2021, 11 p.m. | 2.3 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.15 ppb (2) | 7.0 μg/m3 (7) | 4.5 μg/m3 (19) | 23.0 | |
| April 11, 2021, 10 p.m. | 2.6 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.15 ppb (2) | 7.3 μg/m3 (7) | 5.0 μg/m3 (21) | 23.0 | |
| April 11, 2021, 9 p.m. | 2.9 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.15 ppb (2) | 2.5 μg/m3 (3) | 1.6 μg/m3 (7) | 27.0 | |
| April 11, 2021, 8 p.m. | 3.2 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | 3.4 μg/m3 (4) | 2.1 μg/m3 (9) | 34.0 | |
| April 11, 2021, 7 p.m. | 3.9 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.16 ppb (3) | 8.5 μg/m3 (8) | 5.3 μg/m3 (23) | 36.0 | |
| April 11, 2021, 6 p.m. | 4.0 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 37.0 ppb (35) | 0.16 ppb (3) | 7.6 μg/m3 (8) | 5.0 μg/m3 (21) | 35.0 | |
| April 11, 2021, 5 p.m. | 4.2 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 36.0 ppb (34) | 0.15 ppb (2) | 10.6 μg/m3 (10) | 6.1 μg/m3 (26) | 34.0 | |
| April 11, 2021, 4 p.m. | 4.4 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.15 ppb (2) | 14.8 μg/m3 (14) | 7.3 μg/m3 (31) | 36.0 | |
| April 11, 2021, 3 p.m. | 3.9 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 43.0 ppb (40) | 0.15 ppb (2) | 15.0 μg/m3 (14) | 6.0 μg/m3 (25) | 40.0 | |
| April 11, 2021, 2 p.m. | 3.4 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 46.0 ppb (43) | 0.14 ppb (2) | 13.7 μg/m3 (13) | 4.4 μg/m3 (19) | 43.0 | |
| April 11, 2021, 1 p.m. | 2.7 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 45.0 ppb (42) | 0.15 ppb (2) | 7.7 μg/m3 (8) | 2.6 μg/m3 (11) | 42.0 | |
| April 11, 2021, noon | 4.2 ppb (4) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 44.0 ppb (41) | 0.14 ppb (2) | 10.5 μg/m3 (10) | 3.4 μg/m3 (15) | 41.0 | |
| April 11, 2021, 11 a.m. | 3.8 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 41.0 ppb (38) | 0.14 ppb (2) | 17.8 μg/m3 (17) | 4.0 μg/m3 (17) | 38.0 | |
| April 11, 2021, 10 a.m. | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 37.0 ppb (35) | 0.14 ppb (2) | 25.9 μg/m3 (24) | 4.8 μg/m3 (20) | 35.0 | |
| April 11, 2021, 9 a.m. | 4.2 ppb (4) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 31.0 ppb (29) | 0.15 ppb (2) | 18.1 μg/m3 (17) | 3.9 μg/m3 (17) | 29.0 | |
| April 11, 2021, 8 a.m. | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.14 ppb (2) | 11.6 μg/m3 (11) | 3.3 μg/m3 (14) | 32.0 | |
| April 11, 2021, 7 a.m. | 2.1 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.14 ppb (2) | 12.6 μg/m3 (12) | 3.4 μg/m3 (15) | 33.0 | |
| April 11, 2021, 6 a.m. | 1.5 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.14 ppb (2) | 10.6 μg/m3 (10) | 3.3 μg/m3 (14) | 36.0 | |
| April 11, 2021, 5 a.m. | 1.5 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.14 ppb (2) | 16.5 μg/m3 (16) | 3.6 μg/m3 (16) | 34.0 | |
| April 11, 2021, 4 a.m. | 2.3 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.14 ppb (2) | 28.0 μg/m3 (26) | 4.2 μg/m3 (18) | 33.0 | |
| April 11, 2021, 3 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | N/A | 22.7 μg/m3 (22) | 3.8 μg/m3 (16) | 33.0 | |
| April 11, 2021, 2 a.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | N/A | 22.7 μg/m3 (22) | 4.1 μg/m3 (18) | 36.0 |