Clinton (23rd Place) IA, US: 41.823101, -90.211899
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 21, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (14) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 21, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (14) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 21, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (14) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 21, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 21, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 21, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 21, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 21, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 21, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 21, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 21, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 21, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 20, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 20, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 20, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 20, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 20, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 20, 2019, 6 p.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 | |
| Sept. 20, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 20, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 20, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 20, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 20, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 20, 2019, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 20, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 20, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 20, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 20, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 20, 2019, 6 a.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. 20, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 20, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 20, 2019, 3 a.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 | |
| Sept. 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 19, 2019, 11 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 | |
| Sept. 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 19, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 19, 2019, 6 p.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 | |
| Sept. 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 19, 2019, 4 p.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 | |
| Sept. 19, 2019, 3 p.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 | |
| Sept. 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (17) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 19, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 19, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (20) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (16) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (11) | N/A | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (11) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 18, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 18, 2019, 3 a.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 | |
| Sept. 18, 2019, 2 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 | |
| Sept. 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 11 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 | |
| Sept. 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 17, 2019, 8 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 | |
| Sept. 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 17, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 17, 2019, noon | 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 | |
| Sept. 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 17, 2019, 7 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 | |
| Sept. 17, 2019, 6 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, 5 a.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 | |
| Sept. 17, 2019, 4 a.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 | |
| Sept. 17, 2019, 3 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 | |
| Sept. 17, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 1 a.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 | |
| Sept. 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 16, 2019, 10 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 | |
| Sept. 16, 2019, 9 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 | |
| Sept. 16, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 16, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 16, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 16, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 16, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 16, 2019, 3 p.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 | |
| Sept. 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 16, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 16, 2019, noon | 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 | |
| Sept. 16, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 16, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 16, 2019, 9 a.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 | |
| Sept. 16, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 16, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 16, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 16, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 16, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 16, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 16, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 16, 2019, 1 a.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 | |
| Sept. 16, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 15, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 15, 2019, 10 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 | |
| Sept. 15, 2019, 9 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 | |
| Sept. 15, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 15, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 15, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 15, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 15, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 15, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 15, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 15, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 15, 2019, noon | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 15, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 15, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 15, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 15, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 15, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 15, 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 (21) | 21.0 | |
| Sept. 15, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 15, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 15, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 15, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 15, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 15, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 14, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (16) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 16.0 | |
| Sept. 14, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 10.0 | |
| Sept. 14, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 14, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 14, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 14, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 14, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 14, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 14, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 14, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 14, 2019, 1 p.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 | |
| Sept. 14, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 |