E Chicago (Indiana Harbor) IN, US: 41.653446, -87.435435
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 21, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Feb. 21, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 18.5 μg/m3 (64) | 64.0 | |
| Feb. 21, 2020, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.7 μg/m3 (54) | 54.0 | |
| Feb. 21, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 12.1 μg/m3 (50) | 50.0 | |
| Feb. 21, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Feb. 21, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.3 μg/m3 (35) | 35.0 | |
| Feb. 21, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.4 μg/m3 (39) | 39.0 | |
| Feb. 21, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.2 μg/m3 (38) | 38.0 | |
| Feb. 21, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.7 μg/m3 (36) | 36.0 | |
| Feb. 21, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Feb. 21, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Feb. 21, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.5 μg/m3 (27) | 27.0 | |
| Feb. 21, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| Feb. 21, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Feb. 21, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 20, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| Feb. 20, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| Feb. 20, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| Feb. 20, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 20, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.8 μg/m3 (24) | 24.0 | |
| Feb. 20, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| Feb. 20, 2020, 5 p.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 | |
| Feb. 20, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Feb. 20, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Feb. 20, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Feb. 20, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Feb. 20, 2020, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 20, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 20, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 20, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Feb. 20, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| Feb. 20, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Feb. 20, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.9 μg/m3 (29) | 29.0 | |
| Feb. 20, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Feb. 20, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 20, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.8 μg/m3 (28) | 28.0 | |
| Feb. 20, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 20, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.3 μg/m3 (22) | 22.0 | |
| Feb. 20, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 19, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| Feb. 19, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| Feb. 19, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.1 μg/m3 (21) | 21.0 | |
| Feb. 19, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| Feb. 19, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| Feb. 19, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.2 μg/m3 (30) | 30.0 | |
| Feb. 19, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.6 μg/m3 (28) | 28.0 | |
| Feb. 19, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 19, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.9 μg/m3 (25) | 25.0 | |
| Feb. 19, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 19, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Feb. 19, 2020, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| Feb. 19, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 19, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Feb. 19, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 10.9 μg/m3 (45) | 45.0 | |
| Feb. 19, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 12.5 μg/m3 (51) | 51.0 | |
| Feb. 19, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 10.9 μg/m3 (45) | 45.0 | |
| Feb. 19, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.6 μg/m3 (36) | 36.0 | |
| Feb. 19, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Feb. 19, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Feb. 19, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 11.2 μg/m3 (47) | 47.0 | |
| Feb. 19, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Feb. 19, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Feb. 19, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| Feb. 18, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.4 μg/m3 (35) | 35.0 | |
| Feb. 18, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.1 μg/m3 (38) | 38.0 | |
| Feb. 18, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Feb. 18, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 12.2 μg/m3 (50) | 50.0 | |
| Feb. 18, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.5 μg/m3 (53) | 53.0 | |
| Feb. 18, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 14.3 μg/m3 (55) | 55.0 | |
| Feb. 18, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 16.2 μg/m3 (59) | 59.0 | |
| Feb. 18, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 19.8 μg/m3 (67) | 67.0 | |
| Feb. 18, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Feb. 18, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 18.9 μg/m3 (65) | 65.0 | |
| Feb. 18, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 18.1 μg/m3 (63) | 63.0 | |
| Feb. 18, 2020, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 13.2 μg/m3 (53) | 53.0 | |
| Feb. 18, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.4 μg/m3 (51) | 51.0 | |
| Feb. 18, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.4 μg/m3 (53) | 53.0 | |
| Feb. 18, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| Feb. 18, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.9 μg/m3 (54) | 54.0 | |
| Feb. 18, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.2 μg/m3 (53) | 53.0 | |
| Feb. 18, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.2 μg/m3 (57) | 57.0 | |
| Feb. 18, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Feb. 18, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Feb. 18, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.8 μg/m3 (58) | 58.0 | |
| Feb. 18, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 14.7 μg/m3 (56) | 56.0 | |
| Feb. 18, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.1 μg/m3 (57) | 57.0 | |
| Feb. 18, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Feb. 17, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.1 μg/m3 (57) | 57.0 | |
| Feb. 17, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 16.4 μg/m3 (59) | 59.0 | |
| Feb. 17, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Feb. 17, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 14.7 μg/m3 (56) | 56.0 | |
| Feb. 17, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.1 μg/m3 (52) | 52.0 | |
| Feb. 17, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.9 μg/m3 (52) | 52.0 | |
| Feb. 17, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.1 μg/m3 (57) | 57.0 | |
| Feb. 17, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 18.8 μg/m3 (64) | 64.0 | |
| Feb. 17, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 19.5 μg/m3 (66) | 66.0 | |
| Feb. 17, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 19.8 μg/m3 (67) | 67.0 | |
| Feb. 17, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 20.3 μg/m3 (68) | 68.0 | |
| Feb. 17, 2020, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 23.7 μg/m3 (75) | 75.0 | |
| Feb. 17, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 25.1 μg/m3 (78) | 78.0 | |
| Feb. 17, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 24.6 μg/m3 (77) | 77.0 | |
| Feb. 17, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 28.3 μg/m3 (85) | 85.0 | |
| Feb. 17, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 36.0 μg/m3 (101) | 101.0 | |
| Feb. 17, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 35.2 μg/m3 (99) | 99.0 | |
| Feb. 17, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 27.5 μg/m3 (83) | 83.0 | |
| Feb. 17, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 21.3 μg/m3 (70) | 70.0 | |
| Feb. 17, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 24.6 μg/m3 (77) | 77.0 | |
| Feb. 17, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 24.5 μg/m3 (77) | 77.0 | |
| Feb. 17, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 23.3 μg/m3 (74) | 74.0 | |
| Feb. 17, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 19.6 μg/m3 (66) | 66.0 | |
| Feb. 17, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.7 μg/m3 (62) | 62.0 | |
| Feb. 16, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Feb. 16, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Feb. 16, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.2 μg/m3 (57) | 57.0 | |
| Feb. 16, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Feb. 16, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Feb. 16, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 19.7 μg/m3 (66) | 66.0 | |
| Feb. 16, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 19.6 μg/m3 (66) | 66.0 | |
| Feb. 16, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 20.3 μg/m3 (68) | 68.0 | |
| Feb. 16, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 22.5 μg/m3 (72) | 72.0 | |
| Feb. 16, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 23.5 μg/m3 (74) | 74.0 | |
| Feb. 16, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 20.8 μg/m3 (69) | 69.0 | |
| Feb. 16, 2020, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 19.7 μg/m3 (66) | 66.0 | |
| Feb. 16, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Feb. 16, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 15.3 μg/m3 (57) | 57.0 | |
| Feb. 16, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.7 μg/m3 (54) | 54.0 | |
| Feb. 16, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.3 μg/m3 (51) | 51.0 | |
| Feb. 16, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| Feb. 16, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Feb. 16, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Feb. 16, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Feb. 16, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.1 μg/m3 (34) | 34.0 | |
| Feb. 16, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.1 μg/m3 (34) | 34.0 | |
| Feb. 16, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Feb. 16, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.8 μg/m3 (32) | 32.0 | |
| Feb. 15, 2020, 11 p.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 | |
| Feb. 15, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| Feb. 15, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Feb. 15, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Feb. 15, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.6 μg/m3 (44) | 44.0 | |
| Feb. 15, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Feb. 15, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Feb. 15, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.7 μg/m3 (45) | 45.0 | |
| Feb. 15, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| Feb. 15, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Feb. 15, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.9 μg/m3 (41) | 41.0 | |
| Feb. 15, 2020, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.7 μg/m3 (45) | 45.0 | |
| Feb. 15, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.6 μg/m3 (48) | 48.0 | |
| Feb. 15, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Feb. 15, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.9 μg/m3 (52) | 52.0 | |
| Feb. 15, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.3 μg/m3 (51) | 51.0 | |
| Feb. 15, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Feb. 15, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 11.4 μg/m3 (48) | 48.0 | |
| Feb. 15, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.9 μg/m3 (41) | 41.0 | |
| Feb. 15, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Feb. 15, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.7 μg/m3 (45) | 45.0 | |
| Feb. 15, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Feb. 15, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.5 μg/m3 (40) | 40.0 | |
| Feb. 15, 2020, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.9 μg/m3 (37) | 37.0 | |
| Feb. 14, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Feb. 14, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Feb. 14, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 14, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.8 μg/m3 (32) | 32.0 | |
| Feb. 14, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.2 μg/m3 (38) | 38.0 | |
| Feb. 14, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.6 μg/m3 (40) | 40.0 | |
| Feb. 14, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.6 μg/m3 (44) | 44.0 | |
| Feb. 14, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Feb. 14, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.3 μg/m3 (47) | 47.0 |