Naperville IL, US: 41.7714, -88.1522
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Sept. 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.3 μg/m3 (47) | 47.0 | |
| Sept. 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.4 μg/m3 (39) | 39.0 | |
| Sept. 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.4 μg/m3 (68) | 68.0 | |
| Sept. 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.9 μg/m3 (37) | 37.0 | |
| Sept. 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.2 μg/m3 (13) | 13.0 | |
| Sept. 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| Sept. 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.5 μg/m3 (10) | 10.0 | |
| Sept. 18, 2019, 7 p.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 | |
| Sept. 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.6 μg/m3 (44) | 44.0 | |
| Sept. 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Sept. 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.5 μg/m3 (53) | 53.0 | |
| Sept. 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Sept. 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.8 μg/m3 (71) | 71.0 | |
| Sept. 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.2 μg/m3 (70) | 70.0 | |
| Sept. 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.7 μg/m3 (51) | 51.0 | |
| Sept. 18, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.4 μg/m3 (53) | 53.0 | |
| Sept. 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.4 μg/m3 (57) | 57.0 | |
| Sept. 18, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.3 μg/m3 (51) | 51.0 | |
| Sept. 18, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.1 μg/m3 (67) | 67.0 | |
| Sept. 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.1 μg/m3 (89) | 89.0 | |
| Sept. 17, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.1 μg/m3 (76) | 76.0 | |
| Sept. 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.9 μg/m3 (69) | 69.0 | |
| Sept. 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.1 μg/m3 (57) | 57.0 | |
| Sept. 17, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Sept. 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.6 μg/m3 (62) | 62.0 | |
| Sept. 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Sept. 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.6 μg/m3 (53) | 53.0 | |
| Sept. 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.9 μg/m3 (52) | 52.0 | |
| Sept. 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| Sept. 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.8 μg/m3 (58) | 58.0 | |
| Sept. 17, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.1 μg/m3 (63) | 63.0 | |
| Sept. 17, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.4 μg/m3 (57) | 57.0 | |
| Sept. 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.3 μg/m3 (57) | 57.0 | |
| Sept. 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.9 μg/m3 (54) | 54.0 | |
| Sept. 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.3 μg/m3 (55) | 55.0 | |
| Sept. 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.3 μg/m3 (53) | 53.0 | |
| Sept. 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.7 μg/m3 (40) | 40.0 | |
| Sept. 17, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 17, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 17, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 17, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.7 μg/m3 (60) | 60.0 | |
| Sept. 17, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.9 μg/m3 (54) | 54.0 | |
| Sept. 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Sept. 16, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| Sept. 16, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.3 μg/m3 (26) | 26.0 | |
| Sept. 16, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 16, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| Sept. 16, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.4 μg/m3 (35) | 35.0 | |
| Sept. 16, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.5 μg/m3 (53) | 53.0 | |
| Sept. 16, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 16, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| Sept. 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Sept. 16, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Sept. 16, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.6 μg/m3 (23) | 23.0 | |
| Sept. 16, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.7 μg/m3 (36) | 36.0 | |
| Sept. 16, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.6 μg/m3 (53) | 53.0 | |
| Sept. 16, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.1 μg/m3 (52) | 52.0 | |
| Sept. 16, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.7 μg/m3 (56) | 56.0 | |
| Sept. 16, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.7 μg/m3 (60) | 60.0 | |
| Sept. 16, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.5 μg/m3 (60) | 60.0 | |
| Sept. 16, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.4 μg/m3 (55) | 55.0 | |
| Sept. 16, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.4 μg/m3 (57) | 57.0 | |
| Sept. 16, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.8 μg/m3 (60) | 60.0 | |
| Sept. 16, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.8 μg/m3 (62) | 62.0 | |
| Sept. 16, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 16, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.8 μg/m3 (54) | 54.0 | |
| Sept. 15, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 μg/m3 (1) | 1.0 | |
| Sept. 15, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 15, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.4 μg/m3 (43) | 43.0 | |
| Sept. 15, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 15, 2019, 7 p.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 | |
| Sept. 15, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| Sept. 15, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.8 μg/m3 (32) | 32.0 | |
| Sept. 15, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 15, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.7 μg/m3 (32) | 32.0 | |
| Sept. 15, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.1 μg/m3 (17) | 17.0 | |
| Sept. 15, 2019, 1 p.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 | |
| Sept. 15, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.6 μg/m3 (28) | 28.0 | |
| Sept. 15, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.4 μg/m3 (14) | 14.0 | |
| Sept. 15, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.1 μg/m3 (25) | 25.0 | |
| Sept. 15, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 15, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.3 μg/m3 (18) | 18.0 | |
| Sept. 15, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -2.5 μg/m3 (0) | N/A | |
| Sept. 15, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -2.7 μg/m3 (0) | N/A | |
| Sept. 15, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| Sept. 15, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Sept. 15, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.8 μg/m3 (58) | 58.0 | |
| Sept. 15, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.3 μg/m3 (70) | 70.0 | |
| Sept. 15, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.5 μg/m3 (64) | 64.0 | |
| Sept. 15, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.1 μg/m3 (50) | 50.0 | |
| Sept. 14, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 14, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.9 μg/m3 (8) | 8.0 | |
| Sept. 14, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Sept. 14, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.3 μg/m3 (26) | 26.0 | |
| Sept. 14, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.7 μg/m3 (20) | 20.0 | |
| Sept. 14, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.4 μg/m3 (6) | 6.0 | |
| Sept. 14, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| Sept. 14, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.8 μg/m3 (12) | 12.0 | |
| Sept. 14, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.8 μg/m3 (24) | 24.0 | |
| Sept. 14, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Sept. 14, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Sept. 14, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| Sept. 14, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.8 μg/m3 (32) | 32.0 | |
| Sept. 14, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.7 μg/m3 (40) | 40.0 | |
| Sept. 14, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.8 μg/m3 (32) | 32.0 | |
| Sept. 14, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.6 μg/m3 (28) | 28.0 | |
| Sept. 14, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.9 μg/m3 (45) | 45.0 | |
| Sept. 14, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| Sept. 14, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| Sept. 14, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.8 μg/m3 (20) | 20.0 | |
| Sept. 14, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.8 μg/m3 (24) | 24.0 | |
| Sept. 14, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.5 μg/m3 (27) | 27.0 | |
| Sept. 14, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.3 μg/m3 (26) | 26.0 | |
| Sept. 14, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.6 μg/m3 (23) | 23.0 | |
| Sept. 13, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.4 μg/m3 (6) | 6.0 | |
| Sept. 13, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.3 μg/m3 (5) | 5.0 | |
| Sept. 13, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.3 μg/m3 (10) | 10.0 | |
| Sept. 13, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.5 μg/m3 (6) | 6.0 | |
| Sept. 13, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -0.8 μg/m3 (0) | N/A | |
| Sept. 13, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.6 μg/m3 (11) | 11.0 | |
| Sept. 13, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -1.2 μg/m3 (0) | N/A | |
| Sept. 13, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Sept. 13, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Sept. 13, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.6 μg/m3 (19) | 19.0 | |
| Sept. 13, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.9 μg/m3 (50) | 50.0 | |
| Sept. 13, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Sept. 13, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.9 μg/m3 (20) | 20.0 | |
| Sept. 13, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.7 μg/m3 (7) | 7.0 | |
| Sept. 13, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 13, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| Sept. 13, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| Sept. 13, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.6 μg/m3 (28) | 28.0 | |
| Sept. 13, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.6 μg/m3 (51) | 51.0 | |
| Sept. 13, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.8 μg/m3 (62) | 62.0 | |
| Sept. 13, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.6 μg/m3 (64) | 64.0 | |
| Sept. 13, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.3 μg/m3 (63) | 63.0 | |
| Sept. 13, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 13, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 22.3 μg/m3 (72) | 72.0 | |
| Sept. 12, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.5 μg/m3 (66) | 66.0 | |
| Sept. 12, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.8 μg/m3 (62) | 62.0 | |
| Sept. 12, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.5 μg/m3 (64) | 64.0 | |
| Sept. 12, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 12, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Sept. 12, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.7 μg/m3 (62) | 62.0 | |
| Sept. 12, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.4 μg/m3 (59) | 59.0 | |
| Sept. 12, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Sept. 12, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.5 μg/m3 (40) | 40.0 | |
| Sept. 12, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.2 μg/m3 (55) | 55.0 | |
| Sept. 12, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Sept. 12, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.2 μg/m3 (34) | 34.0 | |
| Sept. 12, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.4 μg/m3 (18) | 18.0 | |
| Sept. 12, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| Sept. 12, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.6 μg/m3 (19) | 19.0 | |
| Sept. 12, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 12, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.1 μg/m3 (9) | 9.0 | |
| Sept. 12, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -5.0 μg/m3 (0) | N/A | |
| Sept. 12, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -3.5 μg/m3 (0) | N/A | |
| Sept. 12, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 12, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 12, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 12, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.2 μg/m3 (70) | 70.0 | |
| Sept. 12, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.8 μg/m3 (69) | 69.0 | |
| Sept. 11, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.4 μg/m3 (74) | 74.0 |