Allen Co OH, US: 40.771, -84.0539
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 24, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 4.2 μg/m3 (18) | 32.0 | |
| May 24, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 5.5 μg/m3 (23) | 33.0 | |
| May 24, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | N/A | 6.6 μg/m3 (28) | 37.0 | |
| May 23, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 52.0 ppb (40) | N/A | N/A | 8.9 μg/m3 (37) | 40.0 | |
| May 23, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 52.0 ppb (40) | N/A | N/A | 8.1 μg/m3 (34) | 40.0 | |
| May 23, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | N/A | N/A | 3.7 μg/m3 (15) | 38.0 | |
| May 23, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | N/A | 5.5 μg/m3 (23) | 37.0 | |
| May 23, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 47.0 ppb (36) | N/A | N/A | 6.2 μg/m3 (26) | 36.0 | |
| May 23, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | N/A | N/A | 6.2 μg/m3 (26) | 38.0 | |
| May 23, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | N/A | N/A | 4.7 μg/m3 (20) | 39.0 | |
| May 23, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | N/A | N/A | 5.5 μg/m3 (23) | 39.0 | |
| May 23, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | N/A | N/A | 5.2 μg/m3 (22) | 38.0 | |
| May 23, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | N/A | 4.5 μg/m3 (19) | 37.0 | |
| May 23, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 46.0 ppb (35) | N/A | N/A | 6.7 μg/m3 (28) | 35.0 | |
| May 23, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| May 23, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 46.0 ppb (35) | N/A | N/A | N/A | 35.0 | |
| May 23, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | N/A | |
| May 23, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 19.0 ppb (15) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| May 23, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | 9.4 μg/m3 (39) | 39.0 | |
| May 23, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | 10.8 μg/m3 (45) | 45.0 | |
| May 23, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | 12.8 μg/m3 (52) | 52.0 | |
| May 23, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 21.0 ppb (16) | N/A | N/A | 9.1 μg/m3 (38) | 38.0 | |
| May 23, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 10.8 μg/m3 (45) | 45.0 | |
| May 23, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| May 23, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| May 23, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 9.6 μg/m3 (40) | 40.0 | |
| May 23, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.6 μg/m3 (28) | 29.0 | |
| May 22, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 8.1 μg/m3 (34) | 34.0 | |
| May 22, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 6.1 μg/m3 (25) | 32.0 | |
| May 22, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 4.5 μg/m3 (19) | 32.0 | |
| May 22, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 4.5 μg/m3 (19) | 32.0 | |
| May 22, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 4.7 μg/m3 (20) | 32.0 | |
| May 22, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 4.2 μg/m3 (18) | 27.0 | |
| May 22, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 22, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (19) | N/A | N/A | 4.0 μg/m3 (17) | 19.0 | |
| May 22, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| May 22, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | N/A | N/A | 5.3 μg/m3 (22) | 22.0 | |
| May 22, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (19) | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 22, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| May 22, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 4.2 μg/m3 (18) | 22.0 | |
| May 22, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.7 μg/m3 (20) | 20.0 | |
| May 22, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| May 22, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| May 22, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 4.0 μg/m3 (17) | 22.0 | |
| May 22, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 3.5 μg/m3 (15) | 22.0 | |
| May 22, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 4.0 μg/m3 (17) | 22.0 | |
| May 22, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 2.8 μg/m3 (12) | 21.0 | |
| May 22, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 22, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (19) | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| May 22, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 3.8 μg/m3 (16) | 21.0 | |
| May 22, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 2.5 μg/m3 (10) | 22.0 | |
| May 21, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 2.5 μg/m3 (10) | 23.0 | |
| May 21, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 2.8 μg/m3 (12) | 24.0 | |
| May 21, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | -1.5 μg/m3 (0) | 25.0 | |
| May 21, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | -2.3 μg/m3 (0) | 24.0 | |
| May 21, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | -1.5 μg/m3 (0) | 23.0 | |
| May 21, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | -0.6 μg/m3 (0) | 23.0 | |
| May 21, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | -0.3 μg/m3 (0) | 24.0 | |
| May 21, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 1.6 μg/m3 (7) | 25.0 | |
| May 21, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 3.0 μg/m3 (12) | 24.0 | |
| May 21, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 1.6 μg/m3 (7) | 22.0 | |
| May 21, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 2.8 μg/m3 (12) | 21.0 | |
| May 21, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (12) | N/A | N/A | 4.7 μg/m3 (20) | 20.0 | |
| May 21, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 10.0 ppb (8) | N/A | N/A | 3.3 μg/m3 (14) | 14.0 | |
| May 21, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| May 21, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (12) | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| May 21, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 18.0 ppb (14) | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| May 21, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 21, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 22.0 ppb (17) | N/A | N/A | 3.8 μg/m3 (16) | 17.0 | |
| May 21, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | N/A | N/A | 3.8 μg/m3 (16) | 18.0 | |
| May 21, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (19) | N/A | N/A | 2.5 μg/m3 (10) | 19.0 | |
| May 21, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | N/A | 3.8 μg/m3 (16) | 18.0 | |
| May 21, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 21, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| May 21, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | N/A | N/A | 4.2 μg/m3 (18) | 20.0 | |
| May 20, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 20, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| May 20, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (19) | N/A | N/A | 3.8 μg/m3 (16) | 19.0 | |
| May 20, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | N/A | N/A | 2.3 μg/m3 (10) | 18.0 | |
| May 20, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 1.3 μg/m3 (5) | 18.0 | |
| May 20, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 2.8 μg/m3 (12) | 18.0 | |
| May 20, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 3.6 μg/m3 (15) | 18.0 | |
| May 20, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 2.6 μg/m3 (11) | 18.0 | |
| May 20, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 0.9 μg/m3 (4) | 18.0 | |
| May 20, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 2.0 μg/m3 (8) | 18.0 | |
| May 20, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | N/A | N/A | 1.6 μg/m3 (7) | 18.0 | |
| May 20, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | 1.3 μg/m3 (5) | 15.0 | |
| May 20, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| May 20, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.5 μg/m3 (23) | 23.0 | |
| May 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | N/A | N/A | 5.5 μg/m3 (23) | 23.0 | |
| May 20, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 33.0 ppb (25) | N/A | N/A | 6.8 μg/m3 (28) | 28.0 | |
| May 20, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 3.7 μg/m3 (15) | 30.0 | |
| May 20, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 3.5 μg/m3 (15) | 29.0 | |
| May 20, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.5 μg/m3 (27) | 29.0 | |
| May 20, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 6.5 μg/m3 (27) | 32.0 | |
| May 20, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 4.7 μg/m3 (20) | 30.0 | |
| May 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 6.0 μg/m3 (25) | 33.0 | |
| May 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 47.0 ppb (36) | N/A | N/A | 5.2 μg/m3 (22) | 36.0 | |
| May 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 4.7 μg/m3 (20) | 32.0 | |
| May 19, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | N/A | 3.8 μg/m3 (16) | 37.0 | |
| May 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 52.0 ppb (40) | N/A | N/A | 4.3 μg/m3 (18) | 40.0 | |
| May 19, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 54.0 ppb (42) | N/A | N/A | 6.7 μg/m3 (28) | 42.0 | |
| May 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 57.0 ppb (44) | N/A | N/A | 8.1 μg/m3 (34) | 44.0 | |
| May 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| May 19, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 5.9 μg/m3 (25) | 28.0 | |
| May 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| May 19, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 10.6 μg/m3 (44) | 44.0 | |
| May 19, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 12.3 μg/m3 (51) | 51.0 | |
| May 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| May 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 7.4 μg/m3 (31) | 32.0 | |
| May 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 10.8 μg/m3 (45) | 45.0 | |
| May 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 12.1 μg/m3 (50) | 50.0 | |
| May 19, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 11.6 μg/m3 (48) | 48.0 | |
| May 19, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 33.0 ppb (25) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| May 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 15.7 μg/m3 (58) | 58.0 | |
| May 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| May 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| May 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 11.6 μg/m3 (48) | 48.0 | |
| May 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| May 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 12.1 μg/m3 (50) | 50.0 | |
| May 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 14.2 μg/m3 (55) | 55.0 | |
| May 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 14.2 μg/m3 (55) | 55.0 | |
| May 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | N/A | N/A | 13.5 μg/m3 (53) | 53.0 | |
| May 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 55.0 ppb (42) | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| May 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 58.0 ppb (45) | N/A | N/A | 12.8 μg/m3 (52) | 52.0 | |
| May 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 59.0 ppb (45) | N/A | N/A | 5.9 μg/m3 (25) | 45.0 | |
| May 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 61.0 ppb (47) | N/A | N/A | 6.6 μg/m3 (28) | 47.0 | |
| May 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 61.0 ppb (47) | N/A | N/A | 8.1 μg/m3 (34) | 47.0 | |
| May 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 61.0 ppb (47) | N/A | N/A | 8.6 μg/m3 (36) | 47.0 | |
| May 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 62.0 ppb (48) | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| May 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 62.0 ppb (48) | N/A | N/A | 12.6 μg/m3 (51) | 51.0 | |
| May 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 56.0 ppb (43) | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| May 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | N/A | 9.6 μg/m3 (40) | 40.0 | |
| May 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 15.2 μg/m3 (57) | 57.0 | |
| May 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | N/A | N/A | 14.7 μg/m3 (56) | 56.0 | |
| May 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | 12.6 μg/m3 (51) | 51.0 | |
| May 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.4 μg/m3 (35) | 35.0 | |
| May 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| May 18, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 15.1 μg/m3 (57) | 57.0 | |
| May 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 14.1 μg/m3 (54) | 54.0 | |
| May 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 18.9 μg/m3 (65) | 65.0 | |
| May 18, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 18.8 μg/m3 (64) | 64.0 | |
| May 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| May 18, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| May 18, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 15.5 μg/m3 (57) | 57.0 | |
| May 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| May 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 12.1 μg/m3 (50) | 50.0 | |
| May 17, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 14.2 μg/m3 (55) | 55.0 | |
| May 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | N/A | N/A | 11.3 μg/m3 (47) | 47.0 | |
| May 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 54.0 ppb (42) | N/A | N/A | 6.6 μg/m3 (28) | 42.0 | |
| May 17, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 55.0 ppb (42) | N/A | N/A | 6.9 μg/m3 (29) | 42.0 | |
| May 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 55.0 ppb (42) | N/A | N/A | 6.9 μg/m3 (29) | 42.0 | |
| May 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 56.0 ppb (43) | N/A | N/A | 8.4 μg/m3 (35) | 43.0 | |
| May 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 55.0 ppb (42) | N/A | N/A | 5.2 μg/m3 (22) | 42.0 | |
| May 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | N/A | N/A | 6.4 μg/m3 (27) | 39.0 | |
| May 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| May 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| May 17, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 4.2 μg/m3 (18) | 25.0 | |
| May 17, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 33.0 ppb (25) | N/A | N/A | 3.7 μg/m3 (15) | 25.0 | |
| May 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 3.3 μg/m3 (14) | 28.0 | |
| May 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.7 μg/m3 (15) | 15.0 | |
| May 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | N/A | 3.0 μg/m3 (12) | 37.0 | |
| May 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 53.0 ppb (41) | N/A | N/A | 2.3 μg/m3 (10) | 41.0 | |
| May 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | N/A | N/A | 5.0 μg/m3 (21) | 39.0 | |
| May 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | N/A | N/A | 5.7 μg/m3 (24) | 38.0 | |
| May 17, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | N/A | N/A | 5.5 μg/m3 (23) | 39.0 | |
| May 17, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 45.0 ppb (35) | N/A | N/A | 5.5 μg/m3 (23) | 35.0 | |
| May 17, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 6.4 μg/m3 (27) | 32.0 |