Wilmington DE, US: 39.7394, -75.5581
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 25, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.14 ppb (2) | N/A | 4.1 μg/m3 (17) | 33.0 | |
| May 25, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.13 ppb (1) | N/A | 4.2 μg/m3 (18) | 33.0 | |
| May 25, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.13 ppb (1) | N/A | 4.1 μg/m3 (17) | 33.0 | |
| May 25, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 42.0 ppb (32) | 0.13 ppb (1) | N/A | 3.7 μg/m3 (15) | 32.0 | |
| May 25, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 40.0 ppb (31) | 0.13 ppb (1) | N/A | 3.7 μg/m3 (15) | 31.0 | |
| May 25, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.13 ppb (1) | N/A | 3.8 μg/m3 (16) | 31.0 | |
| May 25, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.12 ppb (1) | N/A | 4.4 μg/m3 (18) | 30.0 | |
| May 25, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.12 ppb (1) | N/A | 4.4 μg/m3 (18) | 28.0 | |
| May 25, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.12 ppb (1) | N/A | 4.4 μg/m3 (18) | 27.0 | |
| May 25, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.13 ppb (1) | N/A | 4.6 μg/m3 (19) | 26.0 | |
| May 25, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.13 ppb (1) | N/A | 5.2 μg/m3 (22) | 23.0 | |
| May 25, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.15 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 25, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.15 ppb (2) | N/A | 4.3 μg/m3 (18) | 21.0 | |
| May 25, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.14 ppb (2) | N/A | 4.1 μg/m3 (17) | 24.0 | |
| May 25, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.14 ppb (2) | N/A | 4.3 μg/m3 (18) | 25.0 | |
| May 25, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.14 ppb (2) | N/A | 4.4 μg/m3 (18) | 26.0 | |
| May 25, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.16 ppb (2) | N/A | 4.5 μg/m3 (19) | 27.0 | |
| May 25, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.18 ppb (2) | N/A | 5.1 μg/m3 (21) | 28.0 | |
| May 25, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.17 ppb (2) | N/A | 5.3 μg/m3 (22) | 32.0 | |
| May 25, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.19 ppb (2) | N/A | 5.2 μg/m3 (22) | 33.0 | |
| May 25, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.28 ppb (3) | N/A | 4.8 μg/m3 (20) | 31.0 | |
| May 25, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.29 ppb (3) | N/A | 4.3 μg/m3 (18) | 30.0 | |
| May 24, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.24 ppb (3) | N/A | 3.3 μg/m3 (14) | 34.0 | |
| May 24, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.22 ppb (2) | N/A | 3.1 μg/m3 (13) | 37.0 | |
| May 24, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.17 ppb (2) | N/A | 3.1 μg/m3 (13) | 37.0 | |
| May 24, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (12) | 36.0 | |
| May 24, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.15 ppb (2) | N/A | 3.3 μg/m3 (14) | 35.0 | |
| May 24, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.16 ppb (2) | N/A | 3.3 μg/m3 (14) | 35.0 | |
| May 24, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.13 ppb (1) | N/A | 3.7 μg/m3 (15) | 35.0 | |
| May 24, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.12 ppb (1) | N/A | 4.1 μg/m3 (17) | 35.0 | |
| May 24, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.13 ppb (1) | N/A | 3.9 μg/m3 (16) | 34.0 | |
| May 24, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.13 ppb (1) | N/A | 3.3 μg/m3 (14) | 33.0 | |
| May 24, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 45.0 ppb (35) | 0.21 ppb (2) | N/A | 5.1 μg/m3 (21) | 35.0 | |
| May 23, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 47.0 ppb (36) | 0.22 ppb (2) | N/A | 9.5 μg/m3 (40) | 40.0 | |
| May 23, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | 46.0 ppb (35) | 0.25 ppb (3) | N/A | 10.1 μg/m3 (42) | 42.0 | |
| May 23, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 42.0 ppb (32) | 0.28 ppb (3) | N/A | 9.5 μg/m3 (40) | 40.0 | |
| May 23, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 45.0 ppb (35) | 0.25 ppb (3) | N/A | 8.7 μg/m3 (36) | 36.0 | |
| May 23, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 41.0 ppb (32) | 0.22 ppb (2) | N/A | 7.2 μg/m3 (30) | 32.0 | |
| May 23, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 43.0 ppb (33) | 0.17 ppb (2) | N/A | 6.3 μg/m3 (26) | 33.0 | |
| May 23, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 37.0 ppb (28) | 0.17 ppb (2) | N/A | 6.5 μg/m3 (27) | 28.0 | |
| May 23, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 33.0 ppb (25) | 0.17 ppb (2) | N/A | 5.7 μg/m3 (24) | 25.0 | |
| May 23, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.17 ppb (2) | N/A | 4.9 μg/m3 (20) | 27.0 | |
| May 23, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.14 ppb (2) | N/A | 4.5 μg/m3 (19) | 28.0 | |
| May 23, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 32.0 ppb (25) | 0.13 ppb (1) | N/A | 4.3 μg/m3 (18) | 25.0 | |
| May 23, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.15 ppb (2) | N/A | 4.9 μg/m3 (20) | 22.0 | |
| May 23, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 22.0 ppb (17) | 0.18 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 23, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | 25.0 ppb (19) | 0.16 ppb (2) | N/A | 4.2 μg/m3 (18) | 19.0 | |
| May 23, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | 29.0 ppb (22) | 0.13 ppb (1) | N/A | 3.9 μg/m3 (16) | 22.0 | |
| May 23, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 31.0 ppb (24) | 0.12 ppb (1) | N/A | 3.7 μg/m3 (15) | 24.0 | |
| May 23, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | 30.0 ppb (23) | 0.12 ppb (1) | N/A | 3.7 μg/m3 (15) | 23.0 | |
| May 23, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | 30.0 ppb (23) | 0.14 ppb (2) | N/A | 3.9 μg/m3 (16) | 23.0 | |
| May 23, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 28.0 ppb (22) | 0.14 ppb (2) | N/A | 4.3 μg/m3 (18) | 22.0 | |
| May 23, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 30.0 ppb (23) | 0.17 ppb (2) | N/A | 4.5 μg/m3 (19) | 23.0 | |
| May 23, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | 24.0 ppb (18) | 0.21 ppb (2) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 23, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 21.0 ppb (16) | 0.2 ppb (2) | N/A | 4.8 μg/m3 (20) | 20.0 | |
| May 23, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.18 ppb (2) | N/A | 5.5 μg/m3 (23) | 24.0 | |
| May 23, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 40.0 ppb (31) | 0.19 ppb (2) | N/A | 4.7 μg/m3 (20) | 31.0 | |
| May 22, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 45.0 ppb (35) | 0.17 ppb (2) | N/A | 5.0 μg/m3 (21) | 35.0 | |
| May 22, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 49.0 ppb (38) | 0.16 ppb (2) | N/A | 4.3 μg/m3 (18) | 38.0 | |
| May 22, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 51.0 ppb (39) | 0.19 ppb (2) | N/A | 4.1 μg/m3 (17) | 39.0 | |
| May 22, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 54.0 ppb (42) | 0.19 ppb (2) | N/A | 4.5 μg/m3 (19) | 42.0 | |
| May 22, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 53.0 ppb (41) | 0.16 ppb (2) | N/A | 4.6 μg/m3 (19) | 41.0 | |
| May 22, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 50.0 ppb (38) | 0.16 ppb (2) | N/A | 4.7 μg/m3 (20) | 38.0 | |
| May 22, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 46.0 ppb (35) | 0.17 ppb (2) | N/A | 4.7 μg/m3 (20) | 35.0 | |
| May 22, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.16 ppb (2) | N/A | 4.2 μg/m3 (18) | 32.0 | |
| May 22, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 39.0 ppb (30) | 0.14 ppb (2) | N/A | 4.1 μg/m3 (17) | 30.0 | |
| May 22, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.15 ppb (2) | N/A | 3.5 μg/m3 (15) | 28.0 | |
| May 22, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.2 ppb (2) | N/A | 3.7 μg/m3 (15) | 22.0 | |
| May 22, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.21 ppb (2) | N/A | 3.5 μg/m3 (15) | 20.0 | |
| May 22, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 23.0 ppb (18) | 0.23 ppb (3) | N/A | 3.5 μg/m3 (15) | 18.0 | |
| May 22, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 18.0 ppb (14) | 0.22 ppb (2) | N/A | 3.5 μg/m3 (15) | 15.0 | |
| May 22, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 14.0 ppb (11) | 0.17 ppb (2) | N/A | 3.5 μg/m3 (15) | 15.0 | |
| May 22, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.14 ppb (2) | N/A | 3.1 μg/m3 (13) | 19.0 | |
| May 22, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.13 ppb (1) | N/A | 3.0 μg/m3 (12) | 24.0 | |
| May 22, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.13 ppb (1) | N/A | 3.0 μg/m3 (12) | 27.0 | |
| May 22, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.12 ppb (1) | N/A | 3.0 μg/m3 (12) | 28.0 | |
| May 22, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.13 ppb (1) | N/A | 3.1 μg/m3 (13) | 28.0 | |
| May 22, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | N/A | 3.2 μg/m3 (13) | 28.0 | |
| May 22, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.22 ppb (2) | N/A | 4.2 μg/m3 (18) | 21.0 | |
| May 22, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.19 ppb (2) | N/A | 4.0 μg/m3 (17) | 22.0 | |
| May 22, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.17 ppb (2) | N/A | 3.6 μg/m3 (15) | 22.0 | |
| May 21, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.17 ppb (2) | N/A | 3.5 μg/m3 (15) | 25.0 | |
| May 21, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.14 ppb (2) | N/A | 3.2 μg/m3 (13) | 29.0 | |
| May 21, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.18 ppb (2) | N/A | 3.1 μg/m3 (13) | 29.0 | |
| May 21, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.16 ppb (2) | N/A | 3.1 μg/m3 (13) | 29.0 | |
| May 21, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | N/A | 3.2 μg/m3 (13) | 28.0 | |
| May 21, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.14 ppb (2) | N/A | 3.1 μg/m3 (13) | 29.0 | |
| May 21, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.14 ppb (2) | N/A | 2.9 μg/m3 (12) | 28.0 | |
| May 21, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.14 ppb (2) | N/A | 2.8 μg/m3 (12) | 28.0 | |
| May 21, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.13 ppb (1) | N/A | 2.9 μg/m3 (12) | 28.0 | |
| May 21, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.13 ppb (1) | N/A | 3.1 μg/m3 (13) | 25.0 | |
| May 21, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.14 ppb (2) | N/A | 3.6 μg/m3 (15) | 21.0 | |
| May 21, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.15 ppb (2) | N/A | 3.7 μg/m3 (15) | 20.0 | |
| May 21, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.16 ppb (2) | N/A | 3.8 μg/m3 (16) | 20.0 | |
| May 21, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.13 ppb (1) | N/A | 3.2 μg/m3 (13) | 24.0 | |
| May 21, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.12 ppb (1) | N/A | 3.4 μg/m3 (14) | 24.0 | |
| May 21, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.1 ppb (1) | N/A | 3.6 μg/m3 (15) | 26.0 | |
| May 21, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | 3.9 μg/m3 (16) | 28.0 | |
| May 21, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | 4.3 μg/m3 (18) | 28.0 | |
| May 21, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | 4.7 μg/m3 (20) | 29.0 | |
| May 21, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.11 ppb (1) | N/A | 6.1 μg/m3 (25) | 29.0 | |
| May 21, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.12 ppb (1) | N/A | 7.0 μg/m3 (29) | 31.0 | |
| May 21, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.14 ppb (2) | N/A | 7.2 μg/m3 (30) | 32.0 | |
| May 21, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.16 ppb (2) | N/A | 6.3 μg/m3 (26) | 33.0 | |
| May 21, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.16 ppb (2) | N/A | 6.3 μg/m3 (26) | 38.0 | |
| May 20, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.18 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 20, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 55.0 ppb (42) | 0.22 ppb (2) | N/A | 11.5 μg/m3 (48) | 48.0 | |
| May 20, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 61.0 ppb (47) | 0.24 ppb (3) | N/A | 11.7 μg/m3 (49) | 49.0 | |
| May 20, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 63.0 ppb (48) | 0.2 ppb (2) | N/A | 11.4 μg/m3 (48) | 48.0 | |
| May 20, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 61.0 ppb (47) | 0.19 ppb (2) | N/A | 11.3 μg/m3 (47) | 47.0 | |
| May 20, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 65.0 ppb (50) | 0.2 ppb (2) | N/A | 11.7 μg/m3 (49) | 50.0 | |
| May 20, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 66.0 ppb (51) | 0.2 ppb (2) | N/A | 12.0 μg/m3 (50) | 51.0 | |
| May 20, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 65.0 ppb (50) | 0.18 ppb (2) | N/A | 12.4 μg/m3 (51) | 51.0 | |
| May 20, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 58.0 ppb (45) | N/A | N/A | 12.9 μg/m3 (52) | 52.0 | |
| May 20, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 12.8 μg/m3 (52) | 52.0 | |
| May 20, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 12.7 μg/m3 (51) | 51.0 | |
| May 20, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.19 ppb (2) | N/A | 12.4 μg/m3 (51) | 51.0 | |
| May 20, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.25 ppb (3) | N/A | 13.2 μg/m3 (53) | 53.0 | |
| May 20, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.18 ppb (2) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| May 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 29.0 ppb (22) | 0.18 ppb (2) | N/A | 13.6 μg/m3 (53) | 53.0 | |
| May 20, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.15 ppb (2) | N/A | 13.3 μg/m3 (53) | 53.0 | |
| May 20, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.17 ppb (2) | N/A | 13.9 μg/m3 (54) | 54.0 | |
| May 20, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | N/A | 14.2 μg/m3 (55) | 55.0 | |
| May 20, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.17 ppb (2) | N/A | 14.5 μg/m3 (55) | 55.0 | |
| May 20, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.17 ppb (2) | N/A | 14.1 μg/m3 (54) | 54.0 | |
| May 20, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.18 ppb (2) | N/A | 13.1 μg/m3 (52) | 52.0 | |
| May 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 42.0 ppb (32) | 0.19 ppb (2) | N/A | 12.8 μg/m3 (52) | 52.0 | |
| May 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 41.0 ppb (32) | 0.2 ppb (2) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| May 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.19 ppb (2) | N/A | 13.1 μg/m3 (52) | 52.0 | |
| May 19, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.2 ppb (2) | N/A | 12.4 μg/m3 (51) | 51.0 | |
| May 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.2 ppb (2) | N/A | 12.3 μg/m3 (51) | 51.0 | |
| May 19, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.19 ppb (2) | N/A | 11.9 μg/m3 (50) | 50.0 | |
| May 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.2 ppb (2) | N/A | 11.5 μg/m3 (48) | 48.0 | |
| May 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.19 ppb (2) | N/A | 11.2 μg/m3 (47) | 47.0 | |
| May 19, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.19 ppb (2) | N/A | 11.1 μg/m3 (46) | 46.0 | |
| May 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.18 ppb (2) | N/A | 10.8 μg/m3 (45) | 45.0 | |
| May 19, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.17 ppb (2) | N/A | 9.5 μg/m3 (40) | 40.0 | |
| May 19, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.16 ppb (2) | N/A | 9.1 μg/m3 (38) | 38.0 | |
| May 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.16 ppb (2) | N/A | 8.6 μg/m3 (36) | 36.0 | |
| May 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.16 ppb (2) | N/A | 8.5 μg/m3 (35) | 35.0 | |
| May 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 33.0 ppb (25) | 0.15 ppb (2) | N/A | 8.1 μg/m3 (34) | 34.0 | |
| May 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.15 ppb (2) | N/A | 7.6 μg/m3 (32) | 32.0 | |
| May 19, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.16 ppb (2) | N/A | 7.2 μg/m3 (30) | 30.0 | |
| May 19, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.15 ppb (2) | N/A | 7.2 μg/m3 (30) | 30.0 | |
| May 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 33.0 ppb (25) | 0.15 ppb (2) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| May 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.15 ppb (2) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.15 ppb (2) | N/A | 6.8 μg/m3 (28) | 29.0 | |
| May 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.16 ppb (2) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| May 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.16 ppb (2) | N/A | 6.6 μg/m3 (28) | 30.0 | |
| May 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.15 ppb (2) | N/A | 6.0 μg/m3 (25) | 31.0 | |
| May 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.14 ppb (2) | N/A | 5.2 μg/m3 (22) | 33.0 | |
| May 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.14 ppb (2) | N/A | 5.9 μg/m3 (25) | 34.0 | |
| May 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 44.0 ppb (34) | 0.15 ppb (2) | N/A | 7.2 μg/m3 (30) | 34.0 | |
| May 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 47.0 ppb (36) | 0.16 ppb (2) | N/A | 8.3 μg/m3 (35) | 36.0 | |
| May 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.19 ppb (2) | N/A | 10.7 μg/m3 (45) | 45.0 | |
| May 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 59.0 ppb (45) | 0.18 ppb (2) | N/A | 10.7 μg/m3 (45) | 45.0 | |
| May 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 63.0 ppb (48) | 0.17 ppb (2) | N/A | 9.8 μg/m3 (41) | 48.0 | |
| May 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 66.0 ppb (51) | 0.17 ppb (2) | N/A | 9.6 μg/m3 (40) | 51.0 | |
| May 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 65.0 ppb (50) | 0.16 ppb (2) | N/A | 8.8 μg/m3 (37) | 50.0 | |
| May 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 59.0 ppb (45) | 0.15 ppb (2) | N/A | 8.2 μg/m3 (34) | 45.0 | |
| May 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 55.0 ppb (42) | 0.14 ppb (2) | N/A | 7.3 μg/m3 (30) | 42.0 | |
| May 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.15 ppb (2) | N/A | 6.9 μg/m3 (29) | 38.0 | |
| May 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.14 ppb (2) | N/A | 5.2 μg/m3 (22) | 35.0 | |
| May 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.13 ppb (1) | N/A | 4.9 μg/m3 (20) | 34.0 | |
| May 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.15 ppb (2) | N/A | 7.8 μg/m3 (32) | 32.0 | |
| May 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.17 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.15 ppb (2) | N/A | 10.8 μg/m3 (45) | 45.0 | |
| May 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.15 ppb (2) | N/A | 12.3 μg/m3 (51) | 51.0 |