Grand Cyn (Mather Point Amphitheater) AZ, US: 36.060444, -112.107028
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 25, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 8.1 μg/m3 (34) | 36.0 | |
| Sept. 25, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 8.1 μg/m3 (34) | 36.0 | |
| Sept. 25, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 8.2 μg/m3 (34) | 37.0 | |
| Sept. 25, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 8.4 μg/m3 (35) | 37.0 | |
| Sept. 25, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 8.4 μg/m3 (35) | 38.0 | |
| Sept. 25, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 8.8 μg/m3 (37) | 37.0 | |
| Sept. 25, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 9.6 μg/m3 (40) | 40.0 | |
| Sept. 25, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| Sept. 25, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| Sept. 25, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 12.7 μg/m3 (51) | 51.0 | |
| Sept. 25, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 25, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 13.5 μg/m3 (53) | 53.0 | |
| Sept. 25, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 13.7 μg/m3 (54) | 54.0 | |
| Sept. 25, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 13.2 μg/m3 (53) | 53.0 | |
| Sept. 24, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 24, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 24, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 12.6 μg/m3 (51) | 51.0 | |
| Sept. 24, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 24, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 14.9 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| Sept. 24, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 24, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 15.3 μg/m3 (57) | 57.0 | |
| Sept. 24, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 15.8 μg/m3 (58) | 58.0 | |
| Sept. 24, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 24, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 16.5 μg/m3 (60) | 60.0 | |
| Sept. 24, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 16.9 μg/m3 (60) | 60.0 | |
| Sept. 24, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 16.6 μg/m3 (60) | 60.0 | |
| Sept. 24, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.5 μg/m3 (60) | 60.0 | |
| Sept. 24, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Sept. 24, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Sept. 24, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 24, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 18.2 μg/m3 (63) | 63.0 | |
| Sept. 24, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 23, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 23, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 18.3 μg/m3 (63) | 63.0 | |
| Sept. 23, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 18.7 μg/m3 (64) | 64.0 | |
| Sept. 23, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 20.4 μg/m3 (68) | 68.0 | |
| Sept. 23, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 16.2 μg/m3 (59) | 59.0 | |
| Sept. 23, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 13.3 μg/m3 (53) | 53.0 | |
| Sept. 23, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 13.1 μg/m3 (52) | 52.0 | |
| Sept. 23, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 23, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 12.4 μg/m3 (51) | 51.0 | |
| Sept. 23, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 23, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 10.4 μg/m3 (43) | 43.0 | |
| Sept. 23, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Sept. 23, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 10.8 μg/m3 (45) | 45.0 | |
| Sept. 23, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| Sept. 23, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 23, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 11.2 μg/m3 (47) | 47.0 | |
| Sept. 23, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 10.6 μg/m3 (44) | 44.0 | |
| Sept. 23, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Sept. 23, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 10.4 μg/m3 (43) | 43.0 | |
| Sept. 23, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 10.9 μg/m3 (45) | 45.0 | |
| Sept. 23, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 23, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 11.9 μg/m3 (50) | 50.0 | |
| Sept. 23, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 11.3 μg/m3 (47) | 47.0 | |
| Sept. 23, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 9.6 μg/m3 (40) | 40.0 | |
| Sept. 22, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 5.9 μg/m3 (25) | 39.0 | |
| Sept. 22, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 9.4 μg/m3 (39) | 39.0 | |
| Sept. 22, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Sept. 22, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 11.9 μg/m3 (50) | 50.0 | |
| Sept. 22, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 13.2 μg/m3 (53) | 53.0 | |
| Sept. 22, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 13.6 μg/m3 (53) | 53.0 | |
| Sept. 22, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 13.2 μg/m3 (53) | 53.0 | |
| Sept. 22, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 12.7 μg/m3 (51) | 51.0 | |
| Sept. 22, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 22, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Sept. 22, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| Sept. 22, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 12.3 μg/m3 (51) | 51.0 | |
| Sept. 22, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 22, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 12.2 μg/m3 (50) | 50.0 | |
| Sept. 22, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 22, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 22, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 11.9 μg/m3 (50) | 50.0 | |
| Sept. 22, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 22, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 11.2 μg/m3 (47) | 47.0 | |
| Sept. 22, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 22, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 22, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 9.1 μg/m3 (38) | 39.0 | |
| Sept. 22, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 6.3 μg/m3 (26) | 41.0 | |
| Sept. 22, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 9.2 μg/m3 (38) | 41.0 | |
| Sept. 21, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 13.8 μg/m3 (54) | 54.0 | |
| Sept. 21, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 17.8 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 17.6 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 21, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 17.8 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 17.7 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.4 μg/m3 (61) | 61.0 | |
| Sept. 21, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 21, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 16.2 μg/m3 (59) | 59.0 | |
| Sept. 21, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 15.9 μg/m3 (58) | 58.0 | |
| Sept. 21, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 17.9 μg/m3 (63) | 63.0 | |
| Sept. 21, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 21, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 18.1 μg/m3 (63) | 63.0 | |
| Sept. 21, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 18.1 μg/m3 (63) | 63.0 | |
| Sept. 21, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 21, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 21, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 15.4 μg/m3 (57) | 57.0 | |
| Sept. 21, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 16.2 μg/m3 (59) | 59.0 | |
| Sept. 21, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.7 μg/m3 (60) | 60.0 | |
| Sept. 21, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 16.4 μg/m3 (59) | 59.0 | |
| Sept. 21, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.6 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.7 μg/m3 (60) | 60.0 | |
| Sept. 21, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 20, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 14.1 μg/m3 (54) | 54.0 | |
| Sept. 20, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 13.9 μg/m3 (54) | 54.0 | |
| Sept. 20, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 14.3 μg/m3 (55) | 55.0 | |
| Sept. 20, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 14.1 μg/m3 (54) | 54.0 | |
| Sept. 20, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 13.8 μg/m3 (54) | 54.0 | |
| Sept. 20, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 15.7 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | N/A | 16.6 μg/m3 (60) | 60.0 | |
| Sept. 20, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 20, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 20, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 ppb (48) | N/A | N/A | 16.4 μg/m3 (59) | 59.0 | |
| Sept. 20, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 ppb (48) | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 20, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | N/A | 15.9 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 15.7 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 15.6 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 15.9 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 20, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 20, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 16.7 μg/m3 (60) | 60.0 | |
| Sept. 20, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 20, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 20, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 20, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 15.9 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 15.8 μg/m3 (58) | 58.0 | |
| Sept. 20, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 15.7 μg/m3 (58) | 58.0 | |
| Sept. 19, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 15.9 μg/m3 (58) | 58.0 | |
| Sept. 19, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 17.2 μg/m3 (61) | 61.0 | |
| Sept. 19, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 17.7 μg/m3 (62) | 62.0 | |
| Sept. 19, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | N/A | 18.2 μg/m3 (63) | 63.0 | |
| Sept. 19, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Sept. 19, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Sept. 19, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (48) | N/A | N/A | 19.8 μg/m3 (67) | 67.0 | |
| Sept. 19, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 20.8 μg/m3 (69) | 69.0 | |
| Sept. 19, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 21.3 μg/m3 (70) | 70.0 | |
| Sept. 19, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 20.6 μg/m3 (68) | 68.0 | |
| Sept. 19, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 19, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 ppb (49) | N/A | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Sept. 19, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 68.0 ppb (52) | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 ppb (52) | N/A | N/A | 16.2 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 ppb (49) | N/A | N/A | 16.4 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 15.8 μg/m3 (58) | 58.0 | |
| Sept. 19, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 19, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 17.2 μg/m3 (61) | 61.0 | |
| Sept. 19, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 18, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 19.7 μg/m3 (66) | 66.0 | |
| Sept. 18, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 21.1 μg/m3 (69) | 69.0 | |
| Sept. 18, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 21.3 μg/m3 (70) | 70.0 | |
| Sept. 18, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 17.6 μg/m3 (62) | 62.0 | |
| Sept. 18, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Sept. 18, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 14.1 μg/m3 (54) | 54.0 | |
| Sept. 18, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 18, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 13.3 μg/m3 (53) | 53.0 | |
| Sept. 18, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 13.3 μg/m3 (53) | 53.0 | |
| Sept. 18, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 13.7 μg/m3 (54) | 54.0 |