Elk Point (475th Ave) SD, US: 42.751518, -96.707208
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 24, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 33.0 μg/m3 (30) | 10.4 μg/m3 (43) | 43.0 | |
| Sept. 24, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 51.0 μg/m3 (46) | 14.3 μg/m3 (55) | 55.0 | |
| Sept. 24, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 71.0 μg/m3 (58) | 16.1 μg/m3 (59) | 59.0 | |
| Sept. 24, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 88.0 μg/m3 (66) | 10.3 μg/m3 (43) | 66.0 | |
| Sept. 23, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 68.0 μg/m3 (56) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 23, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | 75.0 μg/m3 (60) | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 23, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | 43.0 μg/m3 (39) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 23, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 55.0 μg/m3 (50) | 7.8 μg/m3 (32) | 50.0 | |
| Sept. 23, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | 58.0 μg/m3 (52) | 8.8 μg/m3 (37) | 52.0 | |
| Sept. 23, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 41.0 μg/m3 (37) | 7.3 μg/m3 (30) | 37.0 | |
| Sept. 23, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 33.0 μg/m3 (30) | 7.6 μg/m3 (32) | 33.0 | |
| Sept. 23, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 35.0 μg/m3 (32) | 6.2 μg/m3 (26) | 32.0 | |
| Sept. 23, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 32.0 μg/m3 (29) | 2.6 μg/m3 (11) | 29.0 | |
| Sept. 23, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | 18.0 μg/m3 (16) | 2.6 μg/m3 (11) | 16.0 | |
| Sept. 23, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | N/A | 15.0 μg/m3 (14) | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 23, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | N/A | 24.0 μg/m3 (22) | 7.4 μg/m3 (31) | 31.0 | |
| Sept. 23, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | 16.0 μg/m3 (15) | 7.2 μg/m3 (30) | 30.0 | |
| Sept. 23, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 19.0 μg/m3 (17) | 8.8 μg/m3 (37) | 37.0 | |
| Sept. 23, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 25.0 μg/m3 (23) | 10.6 μg/m3 (44) | 44.0 | |
| Sept. 23, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 29.0 μg/m3 (26) | 14.2 μg/m3 (55) | 55.0 | |
| Sept. 23, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 32.0 μg/m3 (29) | 16.3 μg/m3 (59) | 59.0 | |
| Sept. 23, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 42.0 μg/m3 (38) | 17.7 μg/m3 (62) | 62.0 | |
| Sept. 23, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 45.0 μg/m3 (41) | 14.2 μg/m3 (55) | 55.0 | |
| Sept. 23, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 47.0 μg/m3 (43) | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 23, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 48.0 μg/m3 (44) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 23, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 62.0 μg/m3 (54) | 18.2 μg/m3 (63) | 63.0 | |
| Sept. 23, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 75.0 μg/m3 (60) | 16.5 μg/m3 (60) | 60.0 | |
| Sept. 23, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 82.0 μg/m3 (64) | 14.5 μg/m3 (55) | 64.0 | |
| Sept. 22, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 58.0 μg/m3 (52) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 22, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | 50.0 μg/m3 (45) | 13.3 μg/m3 (53) | 53.0 | |
| Sept. 22, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | 55.0 μg/m3 (50) | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 22, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | 55.0 μg/m3 (50) | 10.6 μg/m3 (44) | 50.0 | |
| Sept. 22, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | 49.0 μg/m3 (45) | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 22, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 42.0 μg/m3 (38) | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 22, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 44.0 μg/m3 (40) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 22, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 54.0 μg/m3 (49) | 12.5 μg/m3 (51) | 51.0 | |
| Sept. 22, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 38.0 μg/m3 (35) | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 22, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 32.0 μg/m3 (29) | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 22, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 32.0 μg/m3 (29) | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 22, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 28.0 μg/m3 (25) | 12.1 μg/m3 (50) | 50.0 | |
| Sept. 22, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 22.0 μg/m3 (20) | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 22, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 24.0 μg/m3 (22) | 12.3 μg/m3 (51) | 51.0 | |
| Sept. 22, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 25.0 μg/m3 (23) | 12.3 μg/m3 (51) | 51.0 | |
| Sept. 22, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 20.0 μg/m3 (18) | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 22, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 29.0 μg/m3 (26) | 9.8 μg/m3 (41) | 41.0 | |
| Sept. 22, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 29.0 μg/m3 (26) | 12.5 μg/m3 (51) | 51.0 | |
| Sept. 22, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 28.0 μg/m3 (25) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 22, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 28.0 μg/m3 (25) | 9.8 μg/m3 (41) | 41.0 | |
| Sept. 22, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 62.0 μg/m3 (54) | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 22, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 68.0 μg/m3 (56) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 22, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 97.0 μg/m3 (71) | 18.9 μg/m3 (65) | 71.0 | |
| Sept. 22, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | 68.0 μg/m3 (56) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 21, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 54.0 μg/m3 (49) | 18.9 μg/m3 (65) | 65.0 | |
| Sept. 21, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | 48.0 μg/m3 (44) | 18.9 μg/m3 (65) | 65.0 | |
| Sept. 21, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | 61.0 μg/m3 (53) | 12.8 μg/m3 (52) | 53.0 | |
| Sept. 21, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 41.0 μg/m3 (37) | 13.2 μg/m3 (53) | 53.0 | |
| Sept. 21, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 45.0 μg/m3 (41) | 13.7 μg/m3 (54) | 54.0 | |
| Sept. 21, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 56.0 μg/m3 (50) | 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 | 40.0 ppb (31) | N/A | 54.0 μg/m3 (49) | 17.5 μg/m3 (62) | 62.0 | |
| Sept. 21, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 56.0 μg/m3 (50) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 21, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 41.0 μg/m3 (37) | 10.8 μg/m3 (45) | 45.0 | |
| Sept. 21, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 36.0 μg/m3 (33) | 11.3 μg/m3 (47) | 47.0 | |
| Sept. 21, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 21.0 μg/m3 (19) | 10.6 μg/m3 (44) | 44.0 | |
| Sept. 21, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 27.0 μg/m3 (25) | 8.8 μg/m3 (37) | 37.0 | |
| Sept. 21, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 18.0 μg/m3 (16) | 11.1 μg/m3 (46) | 46.0 | |
| Sept. 21, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 18.0 μg/m3 (16) | 11.5 μg/m3 (48) | 48.0 | |
| Sept. 21, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 28.0 μg/m3 (25) | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 21, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 26.0 μg/m3 (24) | 14.5 μg/m3 (55) | 55.0 | |
| Sept. 21, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 27.0 μg/m3 (25) | 17.3 μg/m3 (61) | 61.0 | |
| Sept. 21, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 30.0 μg/m3 (27) | 12.5 μg/m3 (51) | 51.0 | |
| Sept. 21, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 31.0 μg/m3 (28) | 15.5 μg/m3 (57) | 57.0 | |
| Sept. 21, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 37.0 μg/m3 (34) | 18.4 μg/m3 (64) | 64.0 | |
| Sept. 21, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 37.0 μg/m3 (34) | 15.2 μg/m3 (57) | 57.0 | |
| Sept. 21, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | 49.0 μg/m3 (45) | 25.3 μg/m3 (78) | 78.0 | |
| Sept. 21, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 57.0 μg/m3 (51) | 25.0 μg/m3 (78) | 78.0 | |
| Sept. 21, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 62.0 μg/m3 (54) | 27.2 μg/m3 (82) | 82.0 | |
| Sept. 20, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 80.0 μg/m3 (62) | 25.5 μg/m3 (79) | 79.0 | |
| Sept. 20, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 73.0 μg/m3 (59) | 26.5 μg/m3 (81) | 81.0 | |
| Sept. 20, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | 90.0 μg/m3 (68) | 30.1 μg/m3 (89) | 89.0 | |
| Sept. 20, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | 69.0 μg/m3 (57) | 22.6 μg/m3 (73) | 73.0 | |
| Sept. 20, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | 56.0 μg/m3 (50) | 19.4 μg/m3 (66) | 66.0 | |
| Sept. 20, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | 64.0 μg/m3 (54) | 19.7 μg/m3 (66) | 66.0 | |
| Sept. 20, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | 84.0 μg/m3 (64) | 18.2 μg/m3 (63) | 64.0 | |
| Sept. 20, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 61.0 μg/m3 (53) | 20.9 μg/m3 (69) | 69.0 | |
| Sept. 20, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 45.0 μg/m3 (41) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 20, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 29.0 μg/m3 (26) | 11.3 μg/m3 (47) | 47.0 | |
| Sept. 20, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 18.0 μg/m3 (16) | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 20, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 22.0 μg/m3 (20) | 12.5 μg/m3 (51) | 51.0 | |
| Sept. 20, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 20.0 μg/m3 (18) | 10.6 μg/m3 (44) | 44.0 | |
| Sept. 20, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 16.0 μg/m3 (15) | 7.3 μg/m3 (30) | 30.0 | |
| Sept. 20, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 21.0 μg/m3 (19) | 10.6 μg/m3 (44) | 44.0 | |
| Sept. 20, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 17.0 μg/m3 (15) | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 20, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 23.0 μg/m3 (21) | 8.6 μg/m3 (36) | 36.0 | |
| Sept. 20, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 31.0 μg/m3 (28) | 8.6 μg/m3 (36) | 36.0 | |
| Sept. 20, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 29.0 μg/m3 (26) | 8.6 μg/m3 (36) | 36.0 | |
| Sept. 20, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 32.0 μg/m3 (29) | 9.9 μg/m3 (41) | 41.0 | |
| Sept. 20, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 35.0 μg/m3 (32) | 12.1 μg/m3 (50) | 50.0 | |
| Sept. 20, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 41.0 μg/m3 (37) | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 20, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | 51.0 μg/m3 (46) | 9.6 μg/m3 (40) | 46.0 | |
| Sept. 20, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 54.0 μg/m3 (49) | 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 | 43.0 ppb (33) | N/A | 54.0 μg/m3 (49) | 11.3 μg/m3 (47) | 49.0 | |
| Sept. 19, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 63.0 μg/m3 (54) | 12.3 μg/m3 (51) | 54.0 | |
| Sept. 19, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 59.0 μg/m3 (52) | 14.2 μg/m3 (55) | 55.0 | |
| Sept. 19, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | 77.0 μg/m3 (61) | 12.3 μg/m3 (51) | 61.0 | |
| Sept. 19, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | 77.0 μg/m3 (61) | 12.6 μg/m3 (51) | 61.0 | |
| Sept. 19, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | 66.0 μg/m3 (56) | 9.6 μg/m3 (40) | 56.0 | |
| Sept. 19, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 66.0 μg/m3 (56) | 7.8 μg/m3 (32) | 56.0 | |
| Sept. 19, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 55.0 μg/m3 (50) | 5.2 μg/m3 (22) | 50.0 | |
| Sept. 19, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 35.0 μg/m3 (32) | 3.3 μg/m3 (14) | 32.0 | |
| Sept. 19, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 27.0 μg/m3 (25) | 6.2 μg/m3 (26) | 26.0 | |
| Sept. 19, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 20.0 μg/m3 (18) | 7.8 μg/m3 (32) | 32.0 | |
| Sept. 19, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 21.0 μg/m3 (19) | 3.8 μg/m3 (16) | 19.0 | |
| Sept. 19, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 15.0 μg/m3 (14) | 4.0 μg/m3 (17) | 19.0 | |
| Sept. 19, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 17.0 μg/m3 (15) | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 19, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 20.0 μg/m3 (18) | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 19, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 28.0 μg/m3 (25) | 7.6 μg/m3 (32) | 32.0 | |
| Sept. 19, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 31.0 μg/m3 (28) | 7.6 μg/m3 (32) | 32.0 | |
| Sept. 19, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 36.0 μg/m3 (33) | 8.8 μg/m3 (37) | 37.0 | |
| Sept. 19, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 27.0 μg/m3 (25) | 8.6 μg/m3 (36) | 36.0 | |
| Sept. 19, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 41.0 μg/m3 (37) | 8.4 μg/m3 (35) | 37.0 | |
| Sept. 19, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 59.0 μg/m3 (52) | 13.3 μg/m3 (53) | 53.0 | |
| Sept. 19, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 35.0 μg/m3 (32) | 11.6 μg/m3 (48) | 48.0 | |
| Sept. 19, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 28.0 μg/m3 (25) | 9.4 μg/m3 (39) | 39.0 | |
| Sept. 19, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 65.0 μg/m3 (55) | 6.0 μg/m3 (25) | 55.0 | |
| Sept. 18, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 40.0 μg/m3 (36) | 5.5 μg/m3 (23) | 36.0 | |
| Sept. 18, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 27.0 μg/m3 (25) | 5.7 μg/m3 (24) | 32.0 | |
| Sept. 18, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | 40.0 μg/m3 (36) | 4.0 μg/m3 (17) | 36.0 | |
| Sept. 18, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | 43.0 μg/m3 (39) | 4.5 μg/m3 (19) | 39.0 | |
| Sept. 18, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | 22.0 μg/m3 (20) | 1.6 μg/m3 (7) | 28.0 | |
| Sept. 18, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 28.0 μg/m3 (25) | 2.8 μg/m3 (12) | 27.0 | |
| Sept. 18, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 18.0 μg/m3 (16) | 4.5 μg/m3 (19) | 25.0 | |
| Sept. 18, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 19.0 μg/m3 (17) | 3.5 μg/m3 (15) | 23.0 | |
| Sept. 18, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 14.0 μg/m3 (13) | 3.1 μg/m3 (13) | 22.0 | |
| Sept. 18, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 8.0 μg/m3 (7) | 3.0 μg/m3 (12) | 20.0 | |
| Sept. 18, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 12.0 μg/m3 (11) | 1.6 μg/m3 (7) | 18.0 | |
| Sept. 18, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 13.0 μg/m3 (12) | 3.6 μg/m3 (15) | 17.0 | |
| Sept. 18, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 11.0 μg/m3 (10) | 5.7 μg/m3 (24) | 24.0 | |
| Sept. 18, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 15.0 μg/m3 (14) | 3.6 μg/m3 (15) | 16.0 | |
| Sept. 18, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 14.0 μg/m3 (13) | 4.3 μg/m3 (18) | 18.0 | |
| Sept. 18, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 13.0 μg/m3 (12) | 2.3 μg/m3 (10) | 16.0 | |
| Sept. 18, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 12.0 μg/m3 (11) | 2.3 μg/m3 (10) | 18.0 | |
| Sept. 18, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 10.0 μg/m3 (9) | 2.3 μg/m3 (10) | 20.0 | |
| Sept. 18, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 18.0 μg/m3 (16) | 4.5 μg/m3 (19) | 22.0 | |
| Sept. 18, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 17.0 μg/m3 (15) | 10.3 μg/m3 (43) | 43.0 | |
| Sept. 18, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 32.0 μg/m3 (29) | 2.8 μg/m3 (12) | 29.0 | |
| Sept. 18, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 23.0 μg/m3 (21) | 5.2 μg/m3 (22) | 22.0 | |
| Sept. 18, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | 74.0 μg/m3 (60) | 7.9 μg/m3 (33) | 60.0 | |
| Sept. 18, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 28.0 μg/m3 (25) | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 17, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 22.0 μg/m3 (20) | 8.1 μg/m3 (34) | 34.0 | |
| Sept. 17, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 38.0 μg/m3 (35) | 6.2 μg/m3 (26) | 35.0 | |
| Sept. 17, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 23.0 μg/m3 (21) | 4.8 μg/m3 (20) | 25.0 | |
| Sept. 17, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 23.0 μg/m3 (21) | 3.8 μg/m3 (16) | 25.0 | |
| Sept. 17, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 24.0 μg/m3 (22) | 4.0 μg/m3 (17) | 24.0 | |
| Sept. 17, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 21.0 μg/m3 (19) | N/A | 22.0 | |
| Sept. 17, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 12.0 μg/m3 (11) | 4.0 μg/m3 (17) | 18.0 | |
| Sept. 17, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 12.0 μg/m3 (11) | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 17, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | N/A | 6.0 μg/m3 (5) | 3.1 μg/m3 (13) | 13.0 | |
| Sept. 17, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | N/A | 25.0 μg/m3 (23) | 3.3 μg/m3 (14) | 23.0 | |
| Sept. 17, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | N/A | 31.0 μg/m3 (28) | 5.7 μg/m3 (24) | 28.0 | |
| Sept. 17, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | N/A | 11.0 μg/m3 (10) | 4.3 μg/m3 (18) | 18.0 | |
| Sept. 17, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | N/A | 13.0 μg/m3 (12) | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 17, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | N/A | 15.0 μg/m3 (14) | 6.2 μg/m3 (26) | 26.0 | |
| Sept. 17, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | N/A | 25.0 μg/m3 (23) | 4.3 μg/m3 (18) | 23.0 | |
| Sept. 17, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | N/A | 33.0 μg/m3 (30) | 4.0 μg/m3 (17) | 30.0 | |
| Sept. 17, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 34.0 μg/m3 (31) | 3.8 μg/m3 (16) | 31.0 | |
| Sept. 17, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 34.0 μg/m3 (31) | 6.5 μg/m3 (27) | 31.0 | |
| Sept. 17, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 35.0 μg/m3 (32) | 9.9 μg/m3 (41) | 41.0 | |
| Sept. 17, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 31.0 μg/m3 (28) | 4.5 μg/m3 (19) | 28.0 |