Herriman (Foothills) UT, US: 40.496408, -112.036305
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 11, 2021, 2 a.m. | 3.9 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 9.4 μg/m3 (40) | 40.0 | |
| April 11, 2021, 1 a.m. | 1.0 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 5.2 μg/m3 (22) | 40.0 | |
| April 11, 2021, midnight | 0.3 ppb (1) | 0.0 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 45.0 ppb (42) | N/A | N/A | 4.7 μg/m3 (20) | 42.0 | |
| April 10, 2021, 11 p.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 5.4 μg/m3 (23) | 44.0 | |
| April 10, 2021, 10 p.m. | 2.2 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 50.0 ppb (47) | N/A | N/A | 5.8 μg/m3 (25) | 47.0 | |
| April 10, 2021, 9 p.m. | 2.2 ppb (3) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 5.4 μg/m3 (23) | 44.0 | |
| April 10, 2021, 8 p.m. | 2.8 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 45.0 ppb (42) | N/A | N/A | 5.8 μg/m3 (25) | 42.0 | |
| April 10, 2021, 7 p.m. | 2.9 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 6.4 μg/m3 (27) | 40.0 | |
| April 10, 2021, 6 p.m. | 3.4 ppb (4) | 1.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 8.5 μg/m3 (36) | 39.0 | |
| April 10, 2021, 5 p.m. | 2.2 ppb (3) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 5.5 μg/m3 (23) | 39.0 | |
| April 10, 2021, 4 p.m. | 2.1 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 5.2 μg/m3 (22) | 38.0 | |
| April 10, 2021, 3 p.m. | 6.4 ppb (7) | 1.9 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 6.1 μg/m3 (26) | 35.0 | |
| April 10, 2021, 2 p.m. | 10.4 ppb (10) | 2.4 ppb (3) | N/A | 8.0 ppb (8) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 6.5 μg/m3 (28) | 29.0 | |
| April 10, 2021, 1 p.m. | 9.6 ppb (10) | 0.8 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 6.5 μg/m3 (28) | 28.0 | |
| April 10, 2021, noon | 6.4 ppb (7) | 0.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 4.8 μg/m3 (20) | 30.0 | |
| April 10, 2021, 11 a.m. | 6.3 ppb (6) | 0.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 4.9 μg/m3 (21) | 21.0 | |
| April 10, 2021, 10 a.m. | 4.5 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 5.5 μg/m3 (23) | 31.0 | |
| April 10, 2021, 9 a.m. | 5.6 ppb (6) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 5.8 μg/m3 (25) | 32.0 | |
| April 10, 2021, 8 a.m. | 4.6 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 5.3 μg/m3 (23) | 35.0 | |
| April 10, 2021, 7 a.m. | 4.4 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| April 10, 2021, 6 a.m. | 3.7 ppb (4) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.5 μg/m3 (15) | 38.0 | |
| April 10, 2021, 5 a.m. | 5.2 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 8.2 μg/m3 (35) | 35.0 | |
| April 10, 2021, 4 a.m. | 4.4 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.3 μg/m3 (14) | 32.0 | |
| April 10, 2021, 3 a.m. | 5.6 ppb (6) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 3.8 μg/m3 (16) | 30.0 | |
| April 10, 2021, 2 a.m. | 4.4 ppb (5) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 5.8 μg/m3 (25) | 35.0 | |
| April 10, 2021, 1 a.m. | 2.5 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 3.4 μg/m3 (15) | 45.0 | |
| April 10, 2021, midnight | 3.6 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 50.0 ppb (47) | N/A | N/A | 4.8 μg/m3 (20) | 47.0 | |
| April 9, 2021, 11 p.m. | 4.3 ppb (5) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | N/A | 6.1 μg/m3 (26) | 48.0 | |
| April 9, 2021, 10 p.m. | 3.9 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | N/A | 6.3 μg/m3 (27) | 48.0 | |
| April 9, 2021, 9 p.m. | 3.5 ppb (4) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 51.0 ppb (48) | N/A | N/A | 5.8 μg/m3 (25) | 48.0 | |
| April 9, 2021, 8 p.m. | 3.0 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 50.0 ppb (47) | N/A | N/A | 5.7 μg/m3 (24) | 47.0 | |
| April 9, 2021, 7 p.m. | 2.7 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 49.0 ppb (46) | N/A | N/A | 5.0 μg/m3 (21) | 46.0 | |
| April 9, 2021, 6 p.m. | 2.8 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 5.0 μg/m3 (21) | 45.0 | |
| April 9, 2021, 5 p.m. | 1.5 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 4.0 μg/m3 (17) | 44.0 | |
| April 9, 2021, 4 p.m. | 1.4 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 3.6 μg/m3 (16) | 43.0 | |
| April 9, 2021, 3 p.m. | 2.7 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 3.3 μg/m3 (14) | 43.0 | |
| April 9, 2021, 2 p.m. | 6.4 ppb (7) | 1.4 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.4 μg/m3 (15) | 37.0 | |
| April 9, 2021, 1 p.m. | 6.4 ppb (7) | 0.5 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.9 μg/m3 (17) | 37.0 | |
| April 9, 2021, noon | 3.6 ppb (4) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 2.2 μg/m3 (10) | 38.0 | |
| April 9, 2021, 11 a.m. | 1.8 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 1.8 μg/m3 (8) | 38.0 | |
| April 9, 2021, 10 a.m. | 1.3 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 2.1 μg/m3 (9) | 34.0 | |
| April 9, 2021, 9 a.m. | 1.0 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.2 μg/m3 (10) | 35.0 | |
| April 9, 2021, 8 a.m. | 0.7 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 2.2 μg/m3 (10) | 37.0 | |
| April 9, 2021, 7 a.m. | 0.4 ppb (1) | -0.1 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.3 μg/m3 (14) | 37.0 | |
| April 9, 2021, 6 a.m. | 0.5 ppb (1) | 0.0 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 4.7 μg/m3 (20) | 37.0 | |
| April 9, 2021, 5 a.m. | 0.7 ppb (1) | -0.1 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 7.4 μg/m3 (31) | 37.0 | |
| April 9, 2021, 4 a.m. | 1.1 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 12.2 μg/m3 (52) | 52.0 | |
| April 9, 2021, 3 a.m. | 0.2 ppb (1) | -0.1 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 15.3 μg/m3 (58) | 58.0 | |
| April 9, 2021, 2 a.m. | 0.8 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 9, 2021, 1 a.m. | 1.5 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 7.9 μg/m3 (33) | 38.0 | |
| April 9, 2021, midnight | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 7.6 μg/m3 (32) | 39.0 | |
| April 8, 2021, 11 p.m. | 1.7 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 6.5 μg/m3 (28) | 39.0 | |
| April 8, 2021, 10 p.m. | 1.8 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 6.0 μg/m3 (25) | 39.0 | |
| April 8, 2021, 9 p.m. | 1.7 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 7.3 μg/m3 (31) | 38.0 | |
| April 8, 2021, 8 p.m. | 1.8 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 7.0 μg/m3 (30) | 38.0 | |
| April 8, 2021, 7 p.m. | 0.9 ppb (1) | 0.3 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 7.1 μg/m3 (30) | 38.0 | |
| April 8, 2021, 6 p.m. | 1.9 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 6.5 μg/m3 (28) | 39.0 | |
| April 8, 2021, 5 p.m. | 5.7 ppb (6) | 1.9 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 5.6 μg/m3 (24) | 37.0 | |
| April 8, 2021, 4 p.m. | 15.6 ppb (15) | 5.7 ppb (6) | N/A | 10.0 ppb (10) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 8.3 μg/m3 (35) | 35.0 | |
| April 8, 2021, 3 p.m. | 17.5 ppb (17) | 6.4 ppb (7) | N/A | 11.0 ppb (11) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| April 8, 2021, 2 p.m. | 10.5 ppb (10) | 2.5 ppb (3) | N/A | 8.0 ppb (8) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 4.0 μg/m3 (17) | 29.0 | |
| April 8, 2021, 1 p.m. | 6.5 ppb (7) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 4.5 μg/m3 (19) | 30.0 | |
| April 8, 2021, noon | 2.9 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.7 μg/m3 (16) | 32.0 | |
| April 8, 2021, 11 a.m. | 4.6 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.3 μg/m3 (14) | 32.0 | |
| April 8, 2021, 10 a.m. | 7.3 ppb (7) | 0.1 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 3.9 μg/m3 (17) | 25.0 | |
| April 8, 2021, 9 a.m. | 4.9 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 4.2 μg/m3 (18) | 28.0 | |
| April 8, 2021, 8 a.m. | 4.2 ppb (4) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 3.5 μg/m3 (15) | 29.0 | |
| April 8, 2021, 7 a.m. | 1.8 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.3 μg/m3 (14) | 36.0 | |
| April 8, 2021, 6 a.m. | 1.5 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.5 μg/m3 (15) | 37.0 | |
| April 8, 2021, 5 a.m. | 1.6 ppb (2) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.2 μg/m3 (14) | 37.0 | |
| April 8, 2021, 4 a.m. | 2.9 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 3.5 μg/m3 (15) | 33.0 | |
| April 8, 2021, 3 a.m. | 7.4 ppb (7) | 0.5 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 4.3 μg/m3 (18) | 29.0 | |
| April 8, 2021, 2 a.m. | 8.1 ppb (8) | 0.1 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 6.2 μg/m3 (26) | 29.0 | |
| April 8, 2021, 1 a.m. | 4.1 ppb (4) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 5.6 μg/m3 (24) | 41.0 | |
| April 8, 2021, midnight | 1.8 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 4.9 μg/m3 (21) | 44.0 | |
| April 7, 2021, 11 p.m. | 1.2 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 4.9 μg/m3 (21) | 45.0 | |
| April 7, 2021, 10 p.m. | 1.0 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 4.8 μg/m3 (20) | 45.0 | |
| April 7, 2021, 9 p.m. | 1.3 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 4.8 μg/m3 (20) | 44.0 | |
| April 7, 2021, 8 p.m. | 1.4 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 4.9 μg/m3 (21) | 43.0 | |
| April 7, 2021, 7 p.m. | 1.6 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 45.0 ppb (42) | N/A | N/A | 4.6 μg/m3 (20) | 42.0 | |
| April 7, 2021, 6 p.m. | 2.2 ppb (3) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 5.0 μg/m3 (21) | 39.0 | |
| April 7, 2021, 5 p.m. | 2.1 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 4.5 μg/m3 (19) | 38.0 | |
| April 7, 2021, 4 p.m. | 4.2 ppb (4) | 1.4 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 5.1 μg/m3 (22) | 37.0 | |
| April 7, 2021, 3 p.m. | 9.3 ppb (9) | 3.1 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| April 7, 2021, 2 p.m. | 17.0 ppb (17) | 5.9 ppb (6) | N/A | 11.0 ppb (11) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 4.4 μg/m3 (19) | 25.0 | |
| April 7, 2021, 1 p.m. | 16.3 ppb (16) | 2.4 ppb (3) | N/A | 14.0 ppb (14) | N/A | N/A | 19.0 ppb (18) | N/A | N/A | 4.0 μg/m3 (17) | 18.0 | |
| April 7, 2021, noon | 9.0 ppb (9) | 0.2 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 22.0 ppb (21) | N/A | N/A | 2.6 μg/m3 (11) | 21.0 | |
| April 7, 2021, 11 a.m. | 6.2 ppb (6) | 0.2 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 2.4 μg/m3 (10) | 25.0 | |
| April 7, 2021, 10 a.m. | 5.0 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 2.2 μg/m3 (10) | 26.0 | |
| April 7, 2021, 9 a.m. | 4.9 ppb (5) | 0.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 2.0 μg/m3 (9) | 26.0 | |
| April 7, 2021, 8 a.m. | 4.6 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 2.1 μg/m3 (9) | 27.0 | |
| April 7, 2021, 7 a.m. | 4.8 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 2.1 μg/m3 (9) | 25.0 | |
| April 7, 2021, 6 a.m. | 12.5 ppb (12) | 0.2 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | 19.0 ppb (18) | N/A | N/A | 3.3 μg/m3 (14) | 18.0 | |
| April 7, 2021, 5 a.m. | 20.3 ppb (20) | 0.3 ppb (1) | N/A | 20.0 ppb (19) | N/A | N/A | 15.0 ppb (14) | N/A | N/A | 4.0 μg/m3 (17) | 20.0 | |
| April 7, 2021, 4 a.m. | 9.4 ppb (9) | 0.2 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 3.9 μg/m3 (17) | 25.0 | |
| April 7, 2021, 3 a.m. | 6.6 ppb (7) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 4.2 μg/m3 (18) | 26.0 | |
| April 7, 2021, 2 a.m. | 6.6 ppb (7) | 0.2 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| April 7, 2021, 1 a.m. | 4.1 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 4.1 μg/m3 (18) | 36.0 | |
| April 7, 2021, midnight | 4.6 ppb (5) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 5.5 μg/m3 (23) | 36.0 | |
| April 6, 2021, 11 p.m. | 5.2 ppb (5) | 1.4 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 6.3 μg/m3 (27) | 37.0 | |
| April 6, 2021, 10 p.m. | 5.3 ppb (5) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 6.8 μg/m3 (29) | 36.0 | |
| April 6, 2021, 9 p.m. | 5.1 ppb (5) | 1.5 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 6.2 μg/m3 (26) | 35.0 | |
| April 6, 2021, 8 p.m. | 4.8 ppb (5) | 1.2 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 5.0 μg/m3 (21) | 34.0 | |
| April 6, 2021, 7 p.m. | 5.1 ppb (5) | 1.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 5.1 μg/m3 (22) | 34.0 | |
| April 6, 2021, 6 p.m. | 5.7 ppb (6) | 1.9 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 4.4 μg/m3 (19) | 33.0 | |
| April 6, 2021, 5 p.m. | 6.4 ppb (7) | 1.7 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.1 μg/m3 (13) | 32.0 | |
| April 6, 2021, 4 p.m. | 5.0 ppb (5) | 1.5 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.0 μg/m3 (9) | 35.0 | |
| April 6, 2021, 3 p.m. | 6.4 ppb (7) | 1.3 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 1.8 μg/m3 (8) | 34.0 | |
| April 6, 2021, 2 p.m. | 7.6 ppb (8) | 0.9 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 1.8 μg/m3 (8) | 33.0 | |
| April 6, 2021, 1 p.m. | 5.5 ppb (6) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 1.5 μg/m3 (7) | 33.0 | |
| April 6, 2021, noon | 3.6 ppb (4) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 1.4 μg/m3 (6) | 35.0 | |
| April 6, 2021, 11 a.m. | 1.9 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 1.1 μg/m3 (5) | 38.0 | |
| April 6, 2021, 10 a.m. | 3.0 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 1.8 μg/m3 (8) | 38.0 | |
| April 6, 2021, 9 a.m. | 4.0 ppb (4) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 2.4 μg/m3 (10) | 39.0 | |
| April 6, 2021, 8 a.m. | 2.0 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 2.2 μg/m3 (10) | 41.0 | |
| April 6, 2021, 7 a.m. | 1.4 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 2.6 μg/m3 (11) | 44.0 | |
| April 6, 2021, 6 a.m. | 1.7 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 2.8 μg/m3 (12) | 38.0 | |
| April 6, 2021, 5 a.m. | 3.0 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 2.9 μg/m3 (13) | 40.0 | |
| April 6, 2021, 4 a.m. | 3.0 ppb (3) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 3.2 μg/m3 (14) | 30.0 | |
| April 6, 2021, 3 a.m. | 1.4 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 8.2 μg/m3 (35) | 35.0 | |
| April 6, 2021, 2 a.m. | 1.0 ppb (1) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 8.9 μg/m3 (38) | 38.0 | |
| April 6, 2021, 1 a.m. | 0.9 ppb (1) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 12.8 μg/m3 (53) | 53.0 | |
| April 6, 2021, midnight | 1.2 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 33.5 μg/m3 (97) | 97.0 | |
| April 5, 2021, 11 p.m. | 1.4 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 5.7 μg/m3 (24) | 38.0 | |
| April 5, 2021, 10 p.m. | 3.5 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.7 μg/m3 (16) | 37.0 | |
| April 5, 2021, 9 p.m. | 2.3 ppb (3) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 3.8 μg/m3 (16) | 39.0 | |
| April 5, 2021, 8 p.m. | 1.7 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 3.2 μg/m3 (14) | 39.0 | |
| April 5, 2021, 7 p.m. | 1.2 ppb (2) | 0.5 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 3.0 μg/m3 (13) | 39.0 | |
| April 5, 2021, 6 p.m. | 0.7 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 4.3 μg/m3 (18) | 38.0 | |
| April 5, 2021, 5 p.m. | 1.4 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 4.2 μg/m3 (18) | 38.0 | |
| April 5, 2021, 4 p.m. | 2.0 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 4.4 μg/m3 (19) | 38.0 | |
| April 5, 2021, 3 p.m. | 5.5 ppb (6) | 1.5 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 5.0 μg/m3 (21) | 34.0 | |
| April 5, 2021, 2 p.m. | 11.8 ppb (12) | 2.5 ppb (3) | N/A | 9.0 ppb (9) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 5.8 μg/m3 (25) | 28.0 | |
| April 5, 2021, 1 p.m. | 10.9 ppb (11) | 1.0 ppb (1) | N/A | 10.0 ppb (10) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 12.6 μg/m3 (53) | 53.0 | |
| April 5, 2021, noon | 6.6 ppb (7) | 0.5 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 4.3 μg/m3 (18) | 30.0 | |
| April 5, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 4.1 μg/m3 (18) | 34.0 | |
| April 5, 2021, 10 a.m. | 2.1 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 3.7 μg/m3 (16) | 31.0 | |
| April 5, 2021, 9 a.m. | 1.2 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.6 μg/m3 (16) | 35.0 | |
| April 5, 2021, 8 a.m. | 1.9 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 4.0 μg/m3 (17) | 33.0 | |
| April 5, 2021, 7 a.m. | 1.7 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 4.2 μg/m3 (18) | 33.0 | |
| April 5, 2021, 6 a.m. | 6.1 ppb (6) | 0.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 4.9 μg/m3 (21) | 29.0 | |
| April 5, 2021, 5 a.m. | 4.3 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 4.7 μg/m3 (20) | 30.0 | |
| April 5, 2021, 4 a.m. | 2.7 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 4.7 μg/m3 (20) | 31.0 | |
| April 5, 2021, 3 a.m. | 3.7 ppb (4) | 0.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 5.7 μg/m3 (24) | 30.0 | |
| April 5, 2021, 2 a.m. | 4.1 ppb (4) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 13.1 μg/m3 (54) | 54.0 | |
| April 5, 2021, 1 a.m. | 1.9 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 5.6 μg/m3 (24) | 38.0 | |
| April 5, 2021, midnight | 1.4 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 5.7 μg/m3 (24) | 40.0 | |
| April 4, 2021, 11 p.m. | 1.1 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 45.0 ppb (42) | N/A | N/A | 5.3 μg/m3 (23) | 42.0 | |
| April 4, 2021, 10 p.m. | 1.1 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 5.6 μg/m3 (24) | 45.0 | |
| April 4, 2021, 9 p.m. | 0.7 ppb (1) | 0.1 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 5.4 μg/m3 (23) | 45.0 | |
| April 4, 2021, 8 p.m. | 0.6 ppb (1) | 0.1 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 5.3 μg/m3 (23) | 44.0 | |
| April 4, 2021, 7 p.m. | 0.7 ppb (1) | 0.1 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 5.3 μg/m3 (23) | 43.0 | |
| April 4, 2021, 6 p.m. | 0.5 ppb (1) | 0.0 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 5.4 μg/m3 (23) | 41.0 | |
| April 4, 2021, 5 p.m. | 0.1 ppb (1) | 0.0 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 4.8 μg/m3 (20) | 41.0 | |
| April 4, 2021, 4 p.m. | 0.7 ppb (1) | 0.2 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 4.8 μg/m3 (20) | 39.0 | |
| April 4, 2021, 3 p.m. | 0.9 ppb (1) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 4.8 μg/m3 (20) | 38.0 | |
| April 4, 2021, 2 p.m. | 1.2 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 4.9 μg/m3 (21) | 36.0 | |
| April 4, 2021, 1 p.m. | 1.5 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 5.2 μg/m3 (22) | 34.0 | |
| April 4, 2021, noon | 1.8 ppb (2) | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 5.2 μg/m3 (22) | 36.0 | |
| April 4, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 5.4 μg/m3 (23) | 38.0 | |
| April 4, 2021, 10 a.m. | 0.6 ppb (1) | -0.1 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 6.6 μg/m3 (28) | 39.0 | |
| April 4, 2021, 9 a.m. | 1.6 ppb (2) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 6.7 μg/m3 (28) | 39.0 | |
| April 4, 2021, 8 a.m. | 2.2 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 6.8 μg/m3 (29) | 38.0 | |
| April 4, 2021, 7 a.m. | 1.0 ppb (1) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 45.0 ppb (42) | N/A | N/A | 5.6 μg/m3 (24) | 42.0 | |
| April 4, 2021, 6 a.m. | 2.3 ppb (3) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 5.6 μg/m3 (24) | 38.0 | |
| April 4, 2021, 5 a.m. | 2.6 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 5.5 μg/m3 (23) | 36.0 | |
| April 4, 2021, 4 a.m. | 3.8 ppb (4) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 7.0 μg/m3 (30) | 36.0 | |
| April 4, 2021, 3 a.m. | 4.3 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 21.4 μg/m3 (71) | 71.0 |