Providence (Downtown) RI, US: 41.829495, -71.417457
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct. 1, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.69 ppb (8) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Oct. 1, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.72 ppb (8) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 30, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.75 ppb (8) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 30, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.57 ppb (6) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 30, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 30, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 1.0 μg/m3 (4) | 5.0 | |
| Sept. 30, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 1.0 μg/m3 (4) | 5.0 | |
| Sept. 30, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 30, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 30, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 30, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 30, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 30, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 30, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 30, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 30, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.21 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 30, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 30, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 30, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 30, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 30, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 1.0 μg/m3 (4) | 4.0 | |
| Sept. 30, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 30, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 30, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 30, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 30, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 29, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.61 ppb (7) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 29, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.68 ppb (8) | N/A | N/A | 8.0 | |
| Sept. 29, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 29, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 29, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 29, 2020, 6 p.m. | 19.8 ppb (18) | 10.2 ppb (9) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 29, 2020, 5 p.m. | 22.2 ppb (21) | 11.2 ppb (10) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 29, 2020, 4 p.m. | 17.8 ppb (16) | 10.8 ppb (10) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 29, 2020, 3 p.m. | 29.2 ppb (27) | 19.0 ppb (18) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 29, 2020, 2 p.m. | 35.0 ppb (32) | 23.8 ppb (22) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 29, 2020, 1 p.m. | 41.0 ppb (38) | 28.2 ppb (26) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.54 ppb (6) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 29, 2020, noon | 42.1 ppb (39) | 26.8 ppb (25) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.54 ppb (6) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 29, 2020, 11 a.m. | 37.3 ppb (35) | 25.7 ppb (24) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 29, 2020, 10 a.m. | 53.0 ppb (49) | 34.5 ppb (32) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 7.0 μg/m3 (29) | 32.0 | |
| Sept. 29, 2020, 9 a.m. | 40.9 ppb (38) | 29.7 ppb (28) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 6.0 μg/m3 (25) | 28.0 | |
| Sept. 29, 2020, 8 a.m. | 27.2 ppb (25) | 16.7 ppb (15) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 29, 2020, 7 a.m. | 30.8 ppb (29) | 19.9 ppb (18) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 29, 2020, 6 a.m. | 21.2 ppb (20) | 11.5 ppb (11) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 29, 2020, 5 a.m. | 19.2 ppb (18) | 8.6 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 29, 2020, 4 a.m. | 13.3 ppb (12) | 6.5 ppb (6) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 29, 2020, 3 a.m. | 17.1 ppb (16) | 8.0 ppb (7) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 29, 2020, 2 a.m. | 21.8 ppb (20) | 10.9 ppb (10) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.56 ppb (6) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 29, 2020, 1 a.m. | 27.5 ppb (25) | 16.0 ppb (15) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.6 ppb (7) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 29, 2020, midnight | 25.1 ppb (23) | 14.3 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.61 ppb (7) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 28, 2020, 11 p.m. | 22.3 ppb (21) | 13.2 ppb (12) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 28, 2020, 10 p.m. | 21.5 ppb (20) | 12.8 ppb (12) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 28, 2020, 9 p.m. | 10.7 ppb (10) | 4.6 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 28, 2020, 8 p.m. | 11.2 ppb (10) | 4.1 ppb (4) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.28 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 28, 2020, 7 p.m. | 13.5 ppb (12) | 6.0 ppb (6) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 28, 2020, 6 p.m. | 15.8 ppb (15) | 7.0 ppb (6) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 28, 2020, 5 p.m. | 15.3 ppb (14) | 8.3 ppb (8) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.29 ppb (3) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 28, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| Sept. 28, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| Sept. 28, 2020, 2 p.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. 28, 2020, 1 p.m. | 28.6 ppb (26) | 20.2 ppb (19) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 28, 2020, noon | 39.3 ppb (36) | 29.1 ppb (27) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 6.0 μg/m3 (25) | 27.0 | |
| Sept. 28, 2020, 11 a.m. | 30.7 ppb (28) | 20.4 ppb (19) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 28, 2020, 10 a.m. | 28.9 ppb (27) | 21.0 ppb (19) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 3.0 μg/m3 (12) | 19.0 | |
| Sept. 28, 2020, 9 a.m. | 21.0 ppb (19) | 14.3 ppb (13) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 3.0 μg/m3 (12) | 13.0 | |
| Sept. 28, 2020, 8 a.m. | 12.0 ppb (11) | 7.2 ppb (7) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 28, 2020, 7 a.m. | 5.8 ppb (5) | 2.6 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 28, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 28, 2020, 5 a.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. 28, 2020, 4 a.m. | 10.6 ppb (10) | 2.7 ppb (3) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 28, 2020, 3 a.m. | 7.9 ppb (7) | 1.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 28, 2020, 2 a.m. | 12.3 ppb (11) | 4.5 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 28, 2020, 1 a.m. | 21.4 ppb (20) | 12.6 ppb (12) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.79 ppb (9) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 28, 2020, midnight | 17.4 ppb (16) | 7.0 ppb (6) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 27, 2020, 11 p.m. | 18.4 ppb (17) | 8.5 ppb (8) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 27, 2020, 10 p.m. | 16.7 ppb (15) | 7.0 ppb (6) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.55 ppb (6) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, 9 p.m. | 15.1 ppb (14) | 6.3 ppb (6) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.55 ppb (6) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, 8 p.m. | 7.1 ppb (7) | 2.6 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 27, 2020, 7 p.m. | 13.9 ppb (13) | 6.7 ppb (6) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.53 ppb (6) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 27, 2020, 6 p.m. | 11.9 ppb (11) | 4.7 ppb (4) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 27, 2020, 5 p.m. | 8.7 ppb (8) | 3.8 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 27, 2020, 4 p.m. | 8.1 ppb (8) | 3.2 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 27, 2020, 3 p.m. | 10.2 ppb (9) | 4.9 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, 2 p.m. | 15.1 ppb (14) | 8.9 ppb (8) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, 1 p.m. | 11.5 ppb (11) | 6.0 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, noon | 11.0 ppb (10) | 5.0 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 27, 2020, 11 a.m. | 5.7 ppb (5) | 2.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 27, 2020, 10 a.m. | 3.7 ppb (3) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 27, 2020, 9 a.m. | 2.6 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 27, 2020, 8 a.m. | 8.2 ppb (8) | 2.6 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| Sept. 27, 2020, 7 a.m. | 10.7 ppb (10) | 5.1 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Sept. 27, 2020, 6 a.m. | 12.6 ppb (12) | 4.6 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.54 ppb (6) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, 5 a.m. | 6.9 ppb (6) | 2.6 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 27, 2020, 4 a.m. | 10.5 ppb (10) | 4.5 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 27, 2020, 3 a.m. | 17.5 ppb (16) | 7.9 ppb (7) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.8 ppb (9) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 27, 2020, 2 a.m. | 19.0 ppb (18) | 10.2 ppb (9) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.68 ppb (8) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 27, 2020, 1 a.m. | 21.8 ppb (20) | 11.1 ppb (10) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.79 ppb (9) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 27, 2020, midnight | 27.1 ppb (25) | 13.5 ppb (12) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.77 ppb (9) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 26, 2020, 11 p.m. | 22.2 ppb (21) | 10.0 ppb (9) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.7 ppb (8) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 26, 2020, 10 p.m. | 25.7 ppb (24) | 12.1 ppb (11) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.62 ppb (7) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 26, 2020, 9 p.m. | 19.6 ppb (18) | 8.8 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.63 ppb (7) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 26, 2020, 8 p.m. | 9.4 ppb (9) | 3.7 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 26, 2020, 7 p.m. | 6.8 ppb (6) | 2.5 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 26, 2020, 6 p.m. | 5.0 ppb (5) | 1.9 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.29 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 26, 2020, 5 p.m. | 5.2 ppb (5) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.29 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 26, 2020, 4 p.m. | 12.6 ppb (12) | 4.6 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 26, 2020, 3 p.m. | 15.7 ppb (15) | 7.4 ppb (7) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 26, 2020, 2 p.m. | 16.8 ppb (16) | 8.9 ppb (8) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 26, 2020, 1 p.m. | 25.8 ppb (24) | 15.7 ppb (15) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.55 ppb (6) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 26, 2020, noon | 39.8 ppb (37) | 21.5 ppb (20) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.62 ppb (7) | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 26, 2020, 11 a.m. | 42.8 ppb (40) | 20.9 ppb (19) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.7 ppb (8) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 26, 2020, 10 a.m. | 29.2 ppb (27) | 14.0 ppb (13) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.54 ppb (6) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 26, 2020, 9 a.m. | 17.0 ppb (16) | 7.5 ppb (7) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 26, 2020, 8 a.m. | 13.8 ppb (13) | 5.3 ppb (5) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 26, 2020, 7 a.m. | 13.5 ppb (12) | 6.3 ppb (6) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.58 ppb (6) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 26, 2020, 6 a.m. | 16.3 ppb (15) | 6.2 ppb (6) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.66 ppb (7) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 26, 2020, 5 a.m. | 14.2 ppb (13) | 5.9 ppb (5) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.79 ppb (9) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 26, 2020, 4 a.m. | 16.3 ppb (15) | 6.3 ppb (6) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.6 ppb (7) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 26, 2020, 3 a.m. | 23.3 ppb (22) | 9.1 ppb (8) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.79 ppb (9) | N/A | 25.0 μg/m3 (78) | 78.0 | |
| Sept. 26, 2020, 2 a.m. | 26.9 ppb (25) | 12.7 ppb (12) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.86 ppb (10) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 26, 2020, 1 a.m. | 25.4 ppb (24) | 8.3 ppb (8) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.77 ppb (9) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 26, 2020, midnight | 19.8 ppb (18) | 3.9 ppb (4) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.7 ppb (8) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 25, 2020, 11 p.m. | 24.4 ppb (23) | 7.8 ppb (7) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.81 ppb (9) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 25, 2020, 10 p.m. | 13.2 ppb (12) | 1.8 ppb (2) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.53 ppb (6) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 25, 2020, 9 p.m. | 11.6 ppb (11) | 1.6 ppb (1) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.5 ppb (6) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 25, 2020, 8 p.m. | 17.6 ppb (16) | 5.6 ppb (5) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.61 ppb (7) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 25, 2020, 7 p.m. | 10.7 ppb (10) | 3.2 ppb (3) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 25, 2020, 6 p.m. | 13.6 ppb (13) | 4.0 ppb (4) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 25, 2020, 5 p.m. | 24.7 ppb (23) | 14.1 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.62 ppb (7) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 25, 2020, 4 p.m. | 40.3 ppb (37) | 22.0 ppb (20) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.7 ppb (8) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 25, 2020, 3 p.m. | 32.4 ppb (30) | 17.7 ppb (16) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.68 ppb (8) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 25, 2020, 2 p.m. | 50.4 ppb (47) | 28.1 ppb (26) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.76 ppb (8) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 25, 2020, 1 p.m. | 65.9 ppb (63) | 38.1 ppb (35) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | 0.96 ppb (11) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 25, 2020, noon | 79.1 ppb (77) | 54.1 ppb (50) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | 1.05 ppb (12) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 25, 2020, 11 a.m. | 81.0 ppb (79) | 60.6 ppb (57) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 1.26 ppb (14) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 25, 2020, 10 a.m. | 101.3 ppb (100) | 79.8 ppb (77) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 1.37 ppb (15) | N/A | 16.0 μg/m3 (59) | 77.0 | |
| Sept. 25, 2020, 9 a.m. | 61.8 ppb (58) | 40.8 ppb (38) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.94 ppb (10) | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 25, 2020, 8 a.m. | 39.1 ppb (36) | 24.2 ppb (22) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.7 ppb (8) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 25, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 25, 2020, 6 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. 25, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 25, 2020, 4 a.m. | 31.0 ppb (29) | 11.0 ppb (10) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.58 ppb (6) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 25, 2020, 3 a.m. | 35.4 ppb (33) | 14.7 ppb (14) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.96 ppb (11) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 25, 2020, 2 a.m. | 31.9 ppb (30) | 13.2 ppb (12) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.9 ppb (10) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 25, 2020, 1 a.m. | 47.7 ppb (44) | 20.7 ppb (19) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | 1.01 ppb (11) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 25, 2020, midnight | 33.4 ppb (31) | 12.3 ppb (11) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.88 ppb (10) | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 24, 2020, 11 p.m. | 34.6 ppb (32) | 13.9 ppb (13) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.82 ppb (9) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 24, 2020, 10 p.m. | 30.8 ppb (29) | 12.6 ppb (12) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.79 ppb (9) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 24, 2020, 9 p.m. | 37.1 ppb (34) | 16.0 ppb (15) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.82 ppb (9) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 24, 2020, 8 p.m. | 28.4 ppb (26) | 14.6 ppb (14) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.62 ppb (7) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 24, 2020, 7 p.m. | 38.1 ppb (35) | 19.6 ppb (18) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.74 ppb (8) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 24, 2020, 6 p.m. | 40.2 ppb (37) | 27.0 ppb (25) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.73 ppb (8) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 24, 2020, 5 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. 24, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 24, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| Sept. 24, 2020, 2 p.m. | 41.9 ppb (39) | 26.2 ppb (24) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.63 ppb (7) | N/A | N/A | 24.0 | |
| Sept. 24, 2020, 1 p.m. | 63.5 ppb (60) | 40.2 ppb (37) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | 0.73 ppb (8) | N/A | N/A | 37.0 | |
| Sept. 24, 2020, noon | 82.4 ppb (80) | 60.5 ppb (57) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 1.01 ppb (11) | N/A | N/A | 57.0 | |
| Sept. 24, 2020, 11 a.m. | 64.5 ppb (61) | 43.9 ppb (41) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.82 ppb (9) | N/A | N/A | 41.0 | |
| Sept. 24, 2020, 10 a.m. | 79.9 ppb (78) | 55.5 ppb (52) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.92 ppb (10) | N/A | N/A | 52.0 | |
| Sept. 24, 2020, 9 a.m. | 53.4 ppb (49) | 32.8 ppb (30) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.65 ppb (7) | N/A | N/A | 30.0 | |
| Sept. 24, 2020, 8 a.m. | 40.3 ppb (37) | 22.0 ppb (20) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | N/A | 20.0 | |
| Sept. 24, 2020, 7 a.m. | 26.1 ppb (24) | 12.8 ppb (12) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | N/A | 12.0 | |
| Sept. 24, 2020, 6 a.m. | 27.7 ppb (26) | 13.8 ppb (13) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | N/A | 13.0 | |
| Sept. 24, 2020, 5 a.m. | 20.5 ppb (19) | 8.4 ppb (8) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.57 ppb (6) | N/A | N/A | 11.0 | |
| Sept. 24, 2020, 4 a.m. | 21.3 ppb (20) | 10.3 ppb (10) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | N/A | 10.0 | |
| Sept. 24, 2020, 3 a.m. | 24.9 ppb (23) | 14.1 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.57 ppb (6) | N/A | N/A | 13.0 | |
| Sept. 24, 2020, 2 a.m. | 23.8 ppb (22) | 11.5 ppb (11) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.72 ppb (8) | N/A | 10.0 μg/m3 (42) | 42.0 |