Detroit (Fort St W) MI, US: 42.3042, -83.1072
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 22, 2020, midnight | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 9.0 | |
| Sept. 21, 2020, 11 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 2.8 μg/m3 (12) | 12.0 | |
| Sept. 21, 2020, 10 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 0.6 μg/m3 (2) | 3.0 | |
| Sept. 21, 2020, 9 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.2 μg/m3 (5) | 5.0 | |
| Sept. 21, 2020, 8 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | -0.4 μg/m3 (0) | 3.0 | |
| Sept. 21, 2020, 7 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 21, 2020, 6 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 10.0 ppb (14) | N/A | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| Sept. 21, 2020, 5 p.m. | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 11.0 ppb (16) | N/A | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Sept. 21, 2020, 4 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 21, 2020, 3 p.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 13.0 ppb (19) | N/A | N/A | N/A | 14.1 μg/m3 (54) | 54.0 | |
| Sept. 21, 2020, 2 p.m. | N/A | N/A | N/A | 13.0 ppb (12) | N/A | 15.0 ppb (21) | N/A | N/A | N/A | 23.9 μg/m3 (75) | 75.0 | |
| Sept. 21, 2020, 1 p.m. | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 25.4 μg/m3 (79) | 79.0 | |
| Sept. 21, 2020, noon | N/A | N/A | N/A | 22.0 ppb (20) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 19.5 μg/m3 (66) | 66.0 | |
| Sept. 21, 2020, 11 a.m. | N/A | N/A | N/A | 26.0 ppb (24) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 19.3 μg/m3 (66) | 66.0 | |
| Sept. 21, 2020, 10 a.m. | N/A | N/A | N/A | 23.0 ppb (21) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 13.7 μg/m3 (54) | 54.0 | |
| Sept. 21, 2020, 9 a.m. | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 8.6 μg/m3 (36) | 36.0 | |
| Sept. 21, 2020, 8 a.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| Sept. 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 | 3.9 μg/m3 (16) | 16.0 | |
| Sept. 21, 2020, 6 a.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.2 μg/m3 (9) | 9.0 | |
| Sept. 21, 2020, 5 a.m. | N/A | N/A | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 2.2 μg/m3 (9) | 11.0 | |
| Sept. 21, 2020, 4 a.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -3.9 μg/m3 (0) | 8.0 | |
| Sept. 21, 2020, 3 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| Sept. 21, 2020, 2 a.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| Sept. 21, 2020, 1 a.m. | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.4 μg/m3 (6) | 9.0 | |
| Sept. 21, 2020, midnight | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.6 μg/m3 (15) | 15.0 | |
| Sept. 20, 2020, 11 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.6 μg/m3 (2) | 2.0 | |
| Sept. 20, 2020, 10 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| Sept. 20, 2020, 9 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.8 μg/m3 (3) | 3.0 | |
| Sept. 20, 2020, 8 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -1.5 μg/m3 (0) | 1.0 | |
| Sept. 20, 2020, 7 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.6 μg/m3 (2) | 2.0 | |
| Sept. 20, 2020, 6 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.6 μg/m3 (19) | 19.0 | |
| Sept. 20, 2020, 5 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | -0.3 μg/m3 (0) | 3.0 | |
| Sept. 20, 2020, 4 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| Sept. 20, 2020, 3 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 3.1 μg/m3 (13) | 13.0 | |
| Sept. 20, 2020, 2 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 3.1 μg/m3 (13) | 13.0 | |
| Sept. 20, 2020, 1 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 20, 2020, noon | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 20, 2020, 11 a.m. | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 30.5 μg/m3 (89) | 89.0 | |
| Sept. 20, 2020, 10 a.m. | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 27.4 μg/m3 (83) | 83.0 | |
| Sept. 20, 2020, 9 a.m. | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 28.4 μg/m3 (85) | 85.0 | |
| Sept. 20, 2020, 8 a.m. | N/A | N/A | N/A | 22.0 ppb (20) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| Sept. 20, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 30.7 μg/m3 (90) | 90.0 | |
| Sept. 20, 2020, 6 a.m. | N/A | N/A | N/A | 25.0 ppb (23) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 27.7 μg/m3 (83) | 83.0 | |
| Sept. 20, 2020, 5 a.m. | N/A | N/A | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | 14.4 μg/m3 (55) | 55.0 | |
| Sept. 20, 2020, 4 a.m. | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 12.2 μg/m3 (50) | 50.0 | |
| Sept. 20, 2020, 3 a.m. | N/A | N/A | N/A | 11.0 ppb (10) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 13.8 μg/m3 (54) | 54.0 | |
| Sept. 20, 2020, 2 a.m. | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| Sept. 20, 2020, 1 a.m. | N/A | N/A | N/A | 13.0 ppb (12) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.6 μg/m3 (36) | 36.0 | |
| Sept. 20, 2020, midnight | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 19, 2020, 11 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| Sept. 19, 2020, 10 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 2.5 μg/m3 (10) | 10.0 | |
| Sept. 19, 2020, 9 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | -2.4 μg/m3 (0) | 4.0 | |
| Sept. 19, 2020, 8 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.8 μg/m3 (8) | 8.0 | |
| Sept. 19, 2020, 7 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 2.1 μg/m3 (9) | 9.0 | |
| Sept. 19, 2020, 6 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | -0.5 μg/m3 (0) | 3.0 | |
| Sept. 19, 2020, 5 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -2.0 μg/m3 (0) | 1.0 | |
| Sept. 19, 2020, 4 p.m. | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.2 μg/m3 (1) | 1.0 | |
| Sept. 19, 2020, 3 p.m. | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 2.8 μg/m3 (12) | 12.0 | |
| Sept. 19, 2020, 2 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Sept. 19, 2020, 1 p.m. | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 15.4 μg/m3 (57) | 57.0 | |
| Sept. 19, 2020, noon | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Sept. 19, 2020, 11 a.m. | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 19, 2020, 10 a.m. | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 19, 2020, 9 a.m. | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.8 μg/m3 (20) | 20.0 | |
| Sept. 19, 2020, 8 a.m. | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.7 μg/m3 (36) | 36.0 | |
| Sept. 19, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.3 μg/m3 (30) | 30.0 | |
| Sept. 19, 2020, 6 a.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.1 μg/m3 (42) | 42.0 | |
| Sept. 19, 2020, 5 a.m. | N/A | N/A | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | 8.7 μg/m3 (36) | 36.0 | |
| Sept. 19, 2020, 4 a.m. | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.5 μg/m3 (23) | 23.0 | |
| Sept. 19, 2020, 3 a.m. | N/A | N/A | N/A | 11.0 ppb (10) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.6 μg/m3 (23) | 23.0 | |
| Sept. 19, 2020, 2 a.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.8 μg/m3 (16) | 16.0 | |
| Sept. 19, 2020, 1 a.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.6 μg/m3 (2) | 6.0 | |
| Sept. 19, 2020, midnight | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.3 μg/m3 (10) | 10.0 | |
| Sept. 18, 2020, 11 p.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| Sept. 18, 2020, 10 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| Sept. 18, 2020, 9 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.2 μg/m3 (5) | 5.0 | |
| Sept. 18, 2020, 8 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.4 μg/m3 (14) | 14.0 | |
| Sept. 18, 2020, 7 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.1 μg/m3 (0) | 4.0 | |
| Sept. 18, 2020, 6 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -0.6 μg/m3 (0) | 3.0 | |
| Sept. 18, 2020, 5 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -0.3 μg/m3 (0) | 4.0 | |
| Sept. 18, 2020, 4 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.4 μg/m3 (6) | 6.0 | |
| Sept. 18, 2020, 3 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -1.2 μg/m3 (0) | 4.0 | |
| Sept. 18, 2020, 2 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.8 μg/m3 (16) | 16.0 | |
| Sept. 18, 2020, 1 p.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 24.6 μg/m3 (77) | 77.0 | |
| Sept. 18, 2020, noon | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 20.9 μg/m3 (69) | 69.0 | |
| Sept. 18, 2020, 11 a.m. | N/A | N/A | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.1 μg/m3 (21) | 21.0 | |
| Sept. 18, 2020, 10 a.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.2 μg/m3 (9) | 9.0 | |
| Sept. 18, 2020, 9 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.5 μg/m3 (19) | 19.0 | |
| Sept. 18, 2020, 8 a.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.1 μg/m3 (5) | 6.0 | |
| Sept. 18, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| Sept. 18, 2020, 6 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.1 μg/m3 (5) | 5.0 | |
| Sept. 18, 2020, 5 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | -2.4 μg/m3 (0) | 4.0 | |
| Sept. 18, 2020, 4 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.2 μg/m3 (1) | 5.0 | |
| Sept. 18, 2020, 3 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.3 μg/m3 (18) | 18.0 | |
| Sept. 18, 2020, 2 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.9 μg/m3 (16) | 16.0 | |
| Sept. 18, 2020, 1 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.7 μg/m3 (11) | 11.0 | |
| Sept. 18, 2020, midnight | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.9 μg/m3 (16) | 16.0 | |
| Sept. 17, 2020, 11 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| Sept. 17, 2020, 10 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -2.4 μg/m3 (0) | 6.0 | |
| Sept. 17, 2020, 9 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -2.5 μg/m3 (0) | 5.0 | |
| Sept. 17, 2020, 8 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.8 μg/m3 (8) | 8.0 | |
| Sept. 17, 2020, 7 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.2 μg/m3 (18) | 18.0 | |
| Sept. 17, 2020, 6 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.2 μg/m3 (1) | 4.0 | |
| Sept. 17, 2020, 5 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.4 μg/m3 (10) | 10.0 | |
| Sept. 17, 2020, 4 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.4 μg/m3 (10) | 10.0 | |
| Sept. 17, 2020, 3 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.1 μg/m3 (13) | 13.0 | |
| Sept. 17, 2020, 2 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | -1.4 μg/m3 (0) | 6.0 | |
| Sept. 17, 2020, 1 p.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.9 μg/m3 (4) | 7.0 | |
| Sept. 17, 2020, noon | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.1 μg/m3 (9) | 9.0 | |
| Sept. 17, 2020, 11 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.5 μg/m3 (6) | 7.0 | |
| Sept. 17, 2020, 10 a.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.4 μg/m3 (14) | 14.0 | |
| Sept. 17, 2020, 9 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.8 μg/m3 (12) | 12.0 | |
| Sept. 17, 2020, 8 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.8 μg/m3 (12) | 12.0 | |
| Sept. 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 | 0.6 μg/m3 (2) | 2.0 | |
| Sept. 17, 2020, 6 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 0.6 μg/m3 (2) | 5.0 | |
| Sept. 17, 2020, 5 a.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 1.5 μg/m3 (6) | 6.0 | |
| Sept. 17, 2020, 4 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| Sept. 17, 2020, 3 a.m. | N/A | N/A | N/A | 11.0 ppb (10) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 12.7 μg/m3 (51) | 51.0 | |
| Sept. 17, 2020, 2 a.m. | N/A | N/A | N/A | 13.0 ppb (12) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| Sept. 17, 2020, 1 a.m. | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 12.3 μg/m3 (51) | 51.0 | |
| Sept. 17, 2020, midnight | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 16, 2020, 11 p.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 12.8 μg/m3 (52) | 52.0 | |
| Sept. 16, 2020, 10 p.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 10.0 ppb (14) | N/A | N/A | N/A | 17.2 μg/m3 (61) | 61.0 | |
| Sept. 16, 2020, 9 p.m. | N/A | N/A | N/A | 13.0 ppb (12) | N/A | 21.0 ppb (30) | N/A | N/A | N/A | 12.4 μg/m3 (51) | 51.0 | |
| Sept. 16, 2020, 8 p.m. | N/A | N/A | N/A | 13.0 ppb (12) | N/A | 21.0 ppb (30) | N/A | N/A | N/A | 13.1 μg/m3 (52) | 52.0 | |
| Sept. 16, 2020, 7 p.m. | N/A | N/A | N/A | 11.0 ppb (10) | N/A | 11.0 ppb (16) | N/A | N/A | N/A | 9.3 μg/m3 (39) | 39.0 | |
| Sept. 16, 2020, 6 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.1 μg/m3 (38) | 38.0 | |
| Sept. 16, 2020, 5 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.9 μg/m3 (41) | 41.0 | |
| Sept. 16, 2020, 4 p.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| Sept. 16, 2020, 3 p.m. | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 12.9 μg/m3 (52) | 52.0 | |
| Sept. 16, 2020, 2 p.m. | N/A | N/A | N/A | 13.0 ppb (12) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| Sept. 16, 2020, 1 p.m. | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 11.9 μg/m3 (50) | 50.0 | |
| Sept. 16, 2020, noon | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| Sept. 16, 2020, 11 a.m. | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| Sept. 16, 2020, 10 a.m. | N/A | N/A | N/A | 12.0 ppb (11) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 15.3 μg/m3 (57) | 57.0 | |
| Sept. 16, 2020, 9 a.m. | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.1 μg/m3 (38) | 38.0 | |
| Sept. 16, 2020, 8 a.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 16, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 15.7 μg/m3 (58) | 58.0 | |
| Sept. 16, 2020, 6 a.m. | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 8.5 μg/m3 (35) | 35.0 | |
| Sept. 16, 2020, 5 a.m. | N/A | N/A | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 0.7 μg/m3 (3) | 18.0 | |
| Sept. 16, 2020, 4 a.m. | N/A | N/A | N/A | 10.0 ppb (9) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 5.2 μg/m3 (22) | 22.0 | |
| Sept. 16, 2020, 3 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 6.8 μg/m3 (28) | 28.0 | |
| Sept. 16, 2020, 2 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 11.8 μg/m3 (49) | 49.0 | |
| Sept. 16, 2020, 1 a.m. | N/A | N/A | N/A | 11.0 ppb (10) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 16, 2020, midnight | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 15, 2020, 11 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 8.4 μg/m3 (35) | 35.0 | |
| Sept. 15, 2020, 10 p.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 10.0 ppb (14) | N/A | N/A | N/A | 8.3 μg/m3 (35) | 35.0 | |
| Sept. 15, 2020, 9 p.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 11.0 ppb (16) | N/A | N/A | N/A | 14.2 μg/m3 (55) | 55.0 | |
| Sept. 15, 2020, 8 p.m. | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 10.4 μg/m3 (43) | 43.0 | |
| Sept. 15, 2020, 7 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 9.7 μg/m3 (40) | 40.0 | |
| Sept. 15, 2020, 6 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 4.1 μg/m3 (17) | 17.0 | |
| Sept. 15, 2020, 5 p.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 9.8 μg/m3 (41) | 41.0 | |
| Sept. 15, 2020, 4 p.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Sept. 15, 2020, 3 p.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 7.7 μg/m3 (32) | 32.0 | |
| Sept. 15, 2020, 2 p.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 9.5 μg/m3 (40) | 40.0 | |
| Sept. 15, 2020, 1 p.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 7.9 μg/m3 (33) | 33.0 | |
| Sept. 15, 2020, noon | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.7 μg/m3 (15) | 15.0 | |
| Sept. 15, 2020, 11 a.m. | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.1 μg/m3 (9) | 17.0 | |
| Sept. 15, 2020, 10 a.m. | N/A | N/A | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.1 μg/m3 (0) | 11.0 | |
| Sept. 15, 2020, 9 a.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.6 μg/m3 (19) | 19.0 | |
| Sept. 15, 2020, 8 a.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.6 μg/m3 (28) | 28.0 | |
| Sept. 15, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Sept. 15, 2020, 6 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.7 μg/m3 (28) | 28.0 | |
| Sept. 15, 2020, 5 a.m. | N/A | N/A | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 7.1 μg/m3 (30) | 30.0 | |
| Sept. 15, 2020, 4 a.m. | N/A | N/A | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 15, 2020, 3 a.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 3.1 μg/m3 (13) | 14.0 | |
| Sept. 15, 2020, 2 a.m. | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.5 μg/m3 (15) | 16.0 | |
| Sept. 15, 2020, 1 a.m. | N/A | N/A | N/A | 11.0 ppb (10) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.3 μg/m3 (18) | 18.0 |