Williams Lake (Williams Lake Riv Valley Trl) CC, CA: 52.1342, -122.1528
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 1, 2021, 4 p.m. | N/A | 22.1 ppb (21) | N/A | 14.0 ppb (14) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 2.7 μg/m3 (12) | 21.0 | |
| March 1, 2021, 3 p.m. | N/A | 21.2 ppb (20) | N/A | 13.0 ppb (13) | N/A | N/A | 19.0 ppb (18) | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| March 1, 2021, 2 p.m. | N/A | 19.5 ppb (19) | N/A | 12.0 ppb (12) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 2.0 μg/m3 (9) | 20.0 | |
| March 1, 2021, 1 p.m. | N/A | 19.9 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 1.2 μg/m3 (5) | 27.0 | |
| March 1, 2021, noon | N/A | 21.0 ppb (20) | N/A | 10.0 ppb (10) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 0.9 μg/m3 (4) | 28.0 | |
| March 1, 2021, 11 a.m. | N/A | 22.9 ppb (22) | N/A | 9.0 ppb (9) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 0.9 μg/m3 (4) | 28.0 | |
| March 1, 2021, 10 a.m. | N/A | 22.5 ppb (22) | N/A | 10.0 ppb (10) | N/A | N/A | 25.0 ppb (24) | N/A | N/A | 10.1 μg/m3 (43) | 43.0 | |
| March 1, 2021, 9 a.m. | N/A | 22.8 ppb (22) | N/A | 9.0 ppb (9) | N/A | N/A | 24.0 ppb (23) | N/A | N/A | 0.9 μg/m3 (4) | 23.0 | |
| March 1, 2021, 8 a.m. | N/A | 23.3 ppb (22) | N/A | 9.0 ppb (9) | N/A | N/A | 23.0 ppb (22) | N/A | N/A | 1.2 μg/m3 (5) | 22.0 | |
| March 1, 2021, 7 a.m. | N/A | 22.8 ppb (22) | N/A | 10.0 ppb (10) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 1.2 μg/m3 (5) | 22.0 | |
| March 1, 2021, 6 a.m. | N/A | 21.3 ppb (21) | N/A | 10.0 ppb (10) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 6.3 μg/m3 (27) | 27.0 | |
| March 1, 2021, 5 a.m. | N/A | 19.9 ppb (19) | N/A | 11.0 ppb (11) | N/A | N/A | 23.0 ppb (22) | N/A | N/A | 1.8 μg/m3 (8) | 22.0 | |
| March 1, 2021, 4 a.m. | N/A | 18.7 ppb (18) | N/A | 10.0 ppb (10) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 1.3 μg/m3 (6) | 28.0 | |
| March 1, 2021, 3 a.m. | N/A | 15.8 ppb (15) | N/A | 11.0 ppb (11) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 1.7 μg/m3 (8) | 27.0 | |
| March 1, 2021, 2 a.m. | N/A | 15.6 ppb (15) | N/A | 12.0 ppb (12) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 2.3 μg/m3 (10) | 29.0 | |
| March 1, 2021, 1 a.m. | N/A | 15.9 ppb (15) | N/A | 13.0 ppb (13) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 0.7 μg/m3 (3) | 30.0 | |
| March 1, 2021, midnight | N/A | 14.9 ppb (15) | N/A | 13.0 ppb (13) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 0.5 μg/m3 (3) | 31.0 | |
| Feb. 28, 2021, 11 p.m. | N/A | 16.1 ppb (16) | N/A | 15.0 ppb (15) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 1.4 μg/m3 (6) | 30.0 | |
| Feb. 28, 2021, 10 p.m. | N/A | 19.4 ppb (19) | N/A | 15.0 ppb (15) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 0.8 μg/m3 (4) | 31.0 | |
| Feb. 28, 2021, 9 p.m. | N/A | 20.1 ppb (19) | N/A | 13.0 ppb (13) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 0.8 μg/m3 (4) | 31.0 | |
| Feb. 28, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 μg/m3 (3) | 3.0 | |
| Feb. 28, 2021, 7 p.m. | N/A | 31.5 ppb (30) | N/A | 13.0 ppb (13) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 0.6 μg/m3 (3) | 31.0 | |
| Feb. 28, 2021, 6 p.m. | N/A | 31.5 ppb (30) | N/A | 11.0 ppb (11) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 1.4 μg/m3 (6) | 30.0 | |
| Feb. 28, 2021, 5 p.m. | N/A | 30.5 ppb (29) | N/A | 12.0 ppb (12) | N/A | N/A | 25.0 ppb (24) | N/A | N/A | 1.5 μg/m3 (7) | 29.0 | |
| Feb. 28, 2021, 4 p.m. | N/A | 31.0 ppb (30) | N/A | 12.0 ppb (12) | N/A | N/A | 25.0 ppb (24) | N/A | N/A | 1.3 μg/m3 (6) | 30.0 | |
| Feb. 28, 2021, 3 p.m. | N/A | 29.5 ppb (28) | N/A | 12.0 ppb (12) | N/A | N/A | 22.0 ppb (21) | N/A | N/A | 1.5 μg/m3 (7) | 28.0 | |
| Feb. 28, 2021, 2 p.m. | N/A | 28.8 ppb (28) | N/A | 13.0 ppb (13) | N/A | N/A | 22.0 ppb (21) | N/A | N/A | 1.7 μg/m3 (8) | 28.0 | |
| Feb. 28, 2021, 1 p.m. | N/A | 28.7 ppb (28) | N/A | 11.0 ppb (11) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 1.7 μg/m3 (8) | 28.0 | |
| Feb. 28, 2021, noon | N/A | 29.7 ppb (29) | N/A | 10.0 ppb (10) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 2.9 μg/m3 (13) | 33.0 | |
| Feb. 28, 2021, 11 a.m. | N/A | 28.6 ppb (27) | N/A | 10.0 ppb (10) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 0.6 μg/m3 (3) | 33.0 | |
| Feb. 28, 2021, 10 a.m. | N/A | 27.8 ppb (27) | N/A | 10.0 ppb (10) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 0.4 μg/m3 (2) | 32.0 | |
| Feb. 28, 2021, 9 a.m. | N/A | 26.7 ppb (26) | N/A | 10.0 ppb (10) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 0.7 μg/m3 (3) | 32.0 | |
| Feb. 28, 2021, 8 a.m. | N/A | 23.6 ppb (23) | N/A | 9.0 ppb (9) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 1.3 μg/m3 (6) | 29.0 | |
| Feb. 28, 2021, 7 a.m. | N/A | 20.5 ppb (20) | N/A | 9.0 ppb (9) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 2.9 μg/m3 (13) | 30.0 | |
| Feb. 28, 2021, 6 a.m. | N/A | 18.6 ppb (18) | N/A | 10.0 ppb (10) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 5.9 μg/m3 (25) | 28.0 | |
| Feb. 28, 2021, 5 a.m. | N/A | 17.3 ppb (17) | N/A | 11.0 ppb (11) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 2.1 μg/m3 (9) | 27.0 | |
| Feb. 28, 2021, 4 a.m. | N/A | 16.2 ppb (16) | N/A | 12.0 ppb (12) | N/A | N/A | 29.0 ppb (27) | N/A | N/A | 3.0 μg/m3 (13) | 27.0 | |
| Feb. 28, 2021, 3 a.m. | N/A | 15.3 ppb (15) | N/A | 11.0 ppb (11) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 3.9 μg/m3 (17) | 31.0 | |
| Feb. 28, 2021, 2 a.m. | N/A | 15.4 ppb (15) | N/A | 10.0 ppb (10) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 2.9 μg/m3 (13) | 38.0 | |
| Feb. 28, 2021, 1 a.m. | N/A | 15.5 ppb (15) | N/A | 10.0 ppb (10) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 5.3 μg/m3 (23) | 39.0 | |
| Feb. 28, 2021, midnight | N/A | 16.0 ppb (16) | N/A | 10.0 ppb (10) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 2.5 μg/m3 (11) | 38.0 | |
| Feb. 27, 2021, 11 p.m. | N/A | 16.0 ppb (16) | N/A | 10.0 ppb (10) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 2.0 μg/m3 (9) | 38.0 | |
| Feb. 27, 2021, 10 p.m. | N/A | 16.1 ppb (16) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 2.3 μg/m3 (10) | 37.0 | |
| Feb. 27, 2021, 9 p.m. | N/A | 16.1 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 4.8 μg/m3 (20) | 36.0 | |
| Feb. 27, 2021, 8 p.m. | N/A | 16.2 ppb (16) | N/A | 12.0 ppb (12) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Feb. 27, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 27, 2021, 6 p.m. | N/A | 15.5 ppb (15) | N/A | 11.0 ppb (11) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 3.7 μg/m3 (16) | 28.0 | |
| Feb. 27, 2021, 5 p.m. | N/A | 15.9 ppb (15) | N/A | 12.0 ppb (12) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 3.9 μg/m3 (17) | 25.0 | |
| Feb. 27, 2021, 4 p.m. | N/A | 15.8 ppb (15) | N/A | 14.0 ppb (14) | N/A | N/A | 23.0 ppb (22) | N/A | N/A | 4.5 μg/m3 (19) | 22.0 | |
| Feb. 27, 2021, 3 p.m. | N/A | 14.4 ppb (14) | N/A | 17.0 ppb (17) | N/A | N/A | 16.0 ppb (15) | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 27, 2021, 2 p.m. | N/A | 13.5 ppb (13) | N/A | 19.0 ppb (18) | N/A | N/A | 14.0 ppb (13) | N/A | N/A | 2.7 μg/m3 (12) | 18.0 | |
| Feb. 27, 2021, 1 p.m. | N/A | 14.2 ppb (14) | N/A | 18.0 ppb (17) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 0.3 μg/m3 (2) | 20.0 | |
| Feb. 27, 2021, noon | N/A | 12.9 ppb (13) | N/A | 14.0 ppb (14) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 0.3 μg/m3 (2) | 25.0 | |
| Feb. 27, 2021, 11 a.m. | N/A | 12.2 ppb (12) | N/A | 11.0 ppb (11) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 1.0 μg/m3 (5) | 32.0 | |
| Feb. 27, 2021, 10 a.m. | N/A | 13.2 ppb (13) | N/A | 12.0 ppb (12) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.1 μg/m3 (13) | 32.0 | |
| Feb. 27, 2021, 9 a.m. | N/A | 14.1 ppb (14) | N/A | 12.0 ppb (12) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 6.8 μg/m3 (29) | 32.0 | |
| Feb. 27, 2021, 8 a.m. | N/A | 14.2 ppb (14) | N/A | 11.0 ppb (11) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 2.8 μg/m3 (12) | 34.0 | |
| Feb. 27, 2021, 7 a.m. | N/A | 15.2 ppb (15) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.7 μg/m3 (3) | 37.0 | |
| Feb. 27, 2021, 6 a.m. | N/A | 15.5 ppb (15) | N/A | 12.0 ppb (12) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 4.8 μg/m3 (20) | 32.0 | |
| Feb. 27, 2021, 5 a.m. | N/A | 15.0 ppb (15) | N/A | 13.0 ppb (13) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| Feb. 27, 2021, 4 a.m. | N/A | 14.5 ppb (14) | N/A | 12.0 ppb (12) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 3.3 μg/m3 (14) | 30.0 | |
| Feb. 27, 2021, 3 a.m. | N/A | 14.2 ppb (14) | N/A | 11.0 ppb (11) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 2.9 μg/m3 (13) | 34.0 | |
| Feb. 27, 2021, 2 a.m. | N/A | 13.9 ppb (14) | N/A | 12.0 ppb (12) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 2.3 μg/m3 (10) | 33.0 | |
| Feb. 27, 2021, 1 a.m. | N/A | 14.0 ppb (14) | N/A | 12.0 ppb (12) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.6 μg/m3 (11) | 35.0 | |
| Feb. 27, 2021, midnight | N/A | 13.7 ppb (13) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 1.6 μg/m3 (7) | 36.0 | |
| Feb. 26, 2021, 11 p.m. | N/A | 14.3 ppb (14) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 1.1 μg/m3 (5) | 38.0 | |
| Feb. 26, 2021, 10 p.m. | N/A | 14.9 ppb (15) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 2.0 μg/m3 (9) | 36.0 | |
| Feb. 26, 2021, 9 p.m. | N/A | 14.3 ppb (14) | N/A | 10.0 ppb (10) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.9 μg/m3 (4) | 38.0 | |
| Feb. 26, 2021, 8 p.m. | N/A | 14.1 ppb (14) | N/A | 10.0 ppb (10) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 1.4 μg/m3 (6) | 38.0 | |
| Feb. 26, 2021, 7 p.m. | N/A | 13.9 ppb (14) | N/A | 10.0 ppb (10) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 1.0 μg/m3 (5) | 38.0 | |
| Feb. 26, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (5) | 5.0 | |
| Feb. 26, 2021, 5 p.m. | N/A | 14.1 ppb (14) | N/A | 10.0 ppb (10) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 1.7 μg/m3 (8) | 38.0 | |
| Feb. 26, 2021, 4 p.m. | N/A | 14.5 ppb (14) | N/A | 11.0 ppb (11) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 1.2 μg/m3 (5) | 35.0 | |
| Feb. 26, 2021, 3 p.m. | N/A | 15.6 ppb (15) | N/A | 11.0 ppb (11) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.0 μg/m3 (13) | 36.0 | |
| Feb. 26, 2021, 2 p.m. | N/A | 16.3 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 4.8 μg/m3 (20) | 34.0 | |
| Feb. 26, 2021, 1 p.m. | N/A | 16.9 ppb (16) | N/A | 11.0 ppb (11) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 4.5 μg/m3 (19) | 34.0 | |
| Feb. 26, 2021, noon | N/A | 17.4 ppb (17) | N/A | 10.0 ppb (10) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.9 μg/m3 (17) | 35.0 | |
| Feb. 26, 2021, 11 a.m. | N/A | 18.4 ppb (18) | N/A | 9.0 ppb (9) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.8 μg/m3 (4) | 38.0 | |
| Feb. 26, 2021, 10 a.m. | N/A | 19.4 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.8 μg/m3 (4) | 38.0 | |
| Feb. 26, 2021, 9 a.m. | N/A | 19.3 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.7 μg/m3 (3) | 37.0 | |
| Feb. 26, 2021, 8 a.m. | N/A | 19.3 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.9 μg/m3 (4) | 38.0 | |
| Feb. 26, 2021, 7 a.m. | N/A | 19.2 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.9 μg/m3 (4) | 38.0 | |
| Feb. 26, 2021, 6 a.m. | N/A | 19.8 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.7 μg/m3 (3) | 38.0 | |
| Feb. 26, 2021, 5 a.m. | N/A | 20.5 ppb (20) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.5 μg/m3 (7) | 37.0 | |
| Feb. 26, 2021, 4 a.m. | N/A | 21.2 ppb (20) | N/A | 9.0 ppb (9) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.6 μg/m3 (7) | 37.0 | |
| Feb. 26, 2021, 3 a.m. | N/A | 22.8 ppb (22) | N/A | 9.0 ppb (9) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.2 μg/m3 (5) | 37.0 | |
| Feb. 26, 2021, 2 a.m. | N/A | 24.4 ppb (24) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.7 μg/m3 (3) | 37.0 | |
| Feb. 26, 2021, 1 a.m. | N/A | 24.7 ppb (24) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.0 μg/m3 (5) | 37.0 | |
| Feb. 26, 2021, midnight | N/A | 25.8 ppb (25) | N/A | 12.0 ppb (12) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 6.4 μg/m3 (27) | 35.0 | |
| Feb. 25, 2021, 11 p.m. | N/A | 27.0 ppb (26) | N/A | 12.0 ppb (12) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 1.2 μg/m3 (5) | 35.0 | |
| Feb. 25, 2021, 10 p.m. | N/A | 26.8 ppb (26) | N/A | 12.0 ppb (12) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 1.7 μg/m3 (8) | 34.0 | |
| Feb. 25, 2021, 9 p.m. | N/A | 25.8 ppb (25) | N/A | 14.0 ppb (14) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 3.4 μg/m3 (15) | 29.0 | |
| Feb. 25, 2021, 8 p.m. | N/A | 24.6 ppb (24) | N/A | 14.0 ppb (14) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 3.6 μg/m3 (16) | 28.0 | |
| Feb. 25, 2021, 7 p.m. | N/A | 23.2 ppb (22) | N/A | 14.0 ppb (14) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 2.7 μg/m3 (12) | 26.0 | |
| Feb. 25, 2021, 6 p.m. | N/A | 21.4 ppb (21) | N/A | 14.0 ppb (14) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 2.3 μg/m3 (10) | 28.0 | |
| Feb. 25, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.5 μg/m3 (15) | 15.0 | |
| Feb. 25, 2021, 4 p.m. | N/A | 18.1 ppb (18) | N/A | 14.0 ppb (14) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 1.9 μg/m3 (8) | 25.0 | |
| Feb. 25, 2021, 3 p.m. | N/A | 16.1 ppb (16) | N/A | 14.0 ppb (14) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 3.4 μg/m3 (15) | 25.0 | |
| Feb. 25, 2021, 2 p.m. | N/A | 15.1 ppb (15) | N/A | 12.0 ppb (12) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 2.7 μg/m3 (12) | 33.0 | |
| Feb. 25, 2021, 1 p.m. | N/A | 12.7 ppb (12) | N/A | 13.0 ppb (13) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 2.4 μg/m3 (10) | 32.0 | |
| Feb. 25, 2021, noon | N/A | 10.8 ppb (11) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.0 μg/m3 (13) | 36.0 | |
| Feb. 25, 2021, 11 a.m. | N/A | 8.4 ppb (8) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 4.4 μg/m3 (19) | 36.0 | |
| Feb. 25, 2021, 10 a.m. | N/A | 6.0 ppb (6) | N/A | 12.0 ppb (12) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.4 μg/m3 (2) | 37.0 | |
| Feb. 25, 2021, 9 a.m. | N/A | 4.0 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.6 μg/m3 (3) | 37.0 | |
| Feb. 25, 2021, 8 a.m. | N/A | 2.6 ppb (3) | N/A | 11.0 ppb (11) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.6 μg/m3 (3) | 37.0 | |
| Feb. 25, 2021, 7 a.m. | N/A | 2.0 ppb (2) | N/A | 12.0 ppb (12) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.6 μg/m3 (3) | 37.0 | |
| Feb. 25, 2021, 6 a.m. | N/A | 2.2 ppb (3) | N/A | 13.0 ppb (13) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 0.6 μg/m3 (3) | 37.0 | |
| Feb. 25, 2021, 5 a.m. | N/A | 3.8 ppb (4) | N/A | 13.0 ppb (13) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 0.6 μg/m3 (3) | 36.0 | |
| Feb. 25, 2021, 4 a.m. | N/A | 4.4 ppb (5) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 1.1 μg/m3 (5) | 36.0 | |
| Feb. 25, 2021, 3 a.m. | N/A | 4.4 ppb (5) | N/A | 13.0 ppb (13) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.4 μg/m3 (6) | 37.0 | |
| Feb. 25, 2021, 2 a.m. | N/A | 6.9 ppb (7) | N/A | 13.0 ppb (13) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.4 μg/m3 (6) | 37.0 | |
| Feb. 25, 2021, 1 a.m. | N/A | 9.2 ppb (9) | N/A | 13.0 ppb (13) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.8 μg/m3 (8) | 37.0 | |
| Feb. 25, 2021, midnight | N/A | 12.4 ppb (12) | N/A | 13.0 ppb (13) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.7 μg/m3 (8) | 37.0 | |
| Feb. 24, 2021, 11 p.m. | N/A | 17.4 ppb (17) | N/A | 12.0 ppb (12) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.5 μg/m3 (15) | 37.0 | |
| Feb. 24, 2021, 10 p.m. | N/A | 17.6 ppb (17) | N/A | 11.0 ppb (11) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 5.2 μg/m3 (22) | 33.0 | |
| Feb. 24, 2021, 9 p.m. | N/A | 17.8 ppb (17) | N/A | 11.0 ppb (11) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 4.7 μg/m3 (20) | 32.0 | |
| Feb. 24, 2021, 8 p.m. | N/A | 18.8 ppb (18) | N/A | 11.0 ppb (11) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| Feb. 24, 2021, 7 p.m. | N/A | 20.6 ppb (20) | N/A | 12.0 ppb (12) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Feb. 24, 2021, 6 p.m. | N/A | 22.3 ppb (22) | N/A | 12.0 ppb (12) | N/A | N/A | 24.0 ppb (23) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| Feb. 24, 2021, 5 p.m. | N/A | 21.8 ppb (21) | N/A | 12.0 ppb (12) | N/A | N/A | 22.0 ppb (21) | N/A | N/A | 15.3 μg/m3 (58) | 58.0 | |
| Feb. 24, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.1 μg/m3 (54) | 54.0 | |
| Feb. 24, 2021, 3 p.m. | N/A | 22.9 ppb (22) | N/A | 18.0 ppb (17) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 14.5 μg/m3 (57) | 57.0 | |
| Feb. 24, 2021, 2 p.m. | N/A | 21.6 ppb (21) | N/A | 17.0 ppb (17) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 13.4 μg/m3 (54) | 54.0 | |
| Feb. 24, 2021, 1 p.m. | N/A | 23.7 ppb (23) | N/A | 18.0 ppb (17) | N/A | N/A | 5.0 ppb (5) | N/A | N/A | 14.8 μg/m3 (57) | 57.0 | |
| Feb. 24, 2021, noon | N/A | 24.5 ppb (24) | N/A | 16.0 ppb (16) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 18.9 μg/m3 (66) | 66.0 | |
| Feb. 24, 2021, 11 a.m. | N/A | 26.5 ppb (25) | N/A | 18.0 ppb (17) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 15.7 μg/m3 (59) | 59.0 | |
| Feb. 24, 2021, 10 a.m. | N/A | 27.2 ppb (26) | N/A | 15.0 ppb (15) | N/A | N/A | 15.0 ppb (14) | N/A | N/A | 8.6 μg/m3 (36) | 36.0 | |
| Feb. 24, 2021, 9 a.m. | N/A | 30.7 ppb (29) | N/A | 15.0 ppb (15) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 11.2 μg/m3 (47) | 47.0 | |
| Feb. 24, 2021, 8 a.m. | N/A | 34.0 ppb (33) | N/A | 18.0 ppb (17) | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 17.1 μg/m3 (62) | 62.0 | |
| Feb. 24, 2021, 7 a.m. | N/A | 38.0 ppb (36) | N/A | 21.0 ppb (20) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 20.9 μg/m3 (70) | 70.0 | |
| Feb. 24, 2021, 6 a.m. | N/A | 36.2 ppb (35) | N/A | 19.0 ppb (18) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 9.4 μg/m3 (40) | 40.0 | |
| Feb. 24, 2021, 5 a.m. | N/A | 36.0 ppb (34) | N/A | 22.0 ppb (21) | N/A | N/A | 8.0 ppb (8) | N/A | N/A | 14.4 μg/m3 (56) | 56.0 | |
| Feb. 24, 2021, 4 a.m. | N/A | 31.7 ppb (30) | N/A | 18.0 ppb (17) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 1.9 μg/m3 (8) | 30.0 | |
| Feb. 24, 2021, 3 a.m. | N/A | 32.3 ppb (31) | N/A | 20.0 ppb (19) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 5.8 μg/m3 (25) | 31.0 | |
| Feb. 24, 2021, 2 a.m. | N/A | 20.2 ppb (20) | N/A | 20.0 ppb (19) | N/A | N/A | 15.0 ppb (14) | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| Feb. 24, 2021, 1 a.m. | N/A | 11.5 ppb (11) | N/A | 11.0 ppb (11) | N/A | N/A | 33.0 ppb (31) | N/A | N/A | 3.4 μg/m3 (15) | 31.0 | |
| Feb. 24, 2021, midnight | N/A | 7.7 ppb (8) | N/A | 9.0 ppb (9) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.9 μg/m3 (8) | 37.0 | |
| Feb. 23, 2021, 11 p.m. | N/A | 4.8 ppb (5) | N/A | 10.0 ppb (10) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 1.1 μg/m3 (5) | 36.0 | |
| Feb. 23, 2021, 10 p.m. | N/A | 2.8 ppb (3) | N/A | 12.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 1.3 μg/m3 (6) | 12.0 | |
| Feb. 23, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 2.8 μg/m3 (12) | 12.0 | |
| Feb. 23, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 6.3 μg/m3 (27) | 27.0 | |
| Feb. 23, 2021, 6 p.m. | N/A | 27.3 ppb (26) | N/A | 19.0 ppb (18) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 6.9 μg/m3 (29) | 29.0 | |
| Feb. 23, 2021, 5 p.m. | N/A | 25.7 ppb (25) | N/A | 20.0 ppb (19) | N/A | N/A | 19.0 ppb (18) | N/A | N/A | 5.4 μg/m3 (23) | 25.0 | |
| Feb. 23, 2021, 4 p.m. | N/A | 23.7 ppb (23) | N/A | 24.0 ppb (23) | N/A | N/A | 9.0 ppb (9) | N/A | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Feb. 23, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.7 μg/m3 (20) | 20.0 | |
| Feb. 23, 2021, 2 p.m. | N/A | 16.6 ppb (16) | N/A | 20.0 ppb (19) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 3.6 μg/m3 (16) | 19.0 | |
| Feb. 23, 2021, 1 p.m. | N/A | 15.1 ppb (15) | N/A | 17.0 ppb (17) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 3.0 μg/m3 (13) | 17.0 | |
| Feb. 23, 2021, noon | N/A | 13.9 ppb (14) | N/A | 16.0 ppb (16) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 23, 2021, 11 a.m. | N/A | 12.8 ppb (13) | N/A | 13.0 ppb (13) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 1.3 μg/m3 (6) | 28.0 | |
| Feb. 23, 2021, 10 a.m. | N/A | 12.2 ppb (12) | N/A | 13.0 ppb (13) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 1.1 μg/m3 (5) | 29.0 | |
| Feb. 23, 2021, 9 a.m. | N/A | 11.4 ppb (11) | N/A | 12.0 ppb (12) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 1.3 μg/m3 (6) | 33.0 | |
| Feb. 23, 2021, 8 a.m. | N/A | 12.0 ppb (12) | N/A | 11.0 ppb (11) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.1 μg/m3 (5) | 37.0 | |
| Feb. 23, 2021, 7 a.m. | N/A | 12.5 ppb (12) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 2.0 μg/m3 (9) | 36.0 | |
| Feb. 23, 2021, 6 a.m. | N/A | 13.4 ppb (13) | N/A | 12.0 ppb (12) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.3 μg/m3 (10) | 35.0 | |
| Feb. 23, 2021, 5 a.m. | N/A | 14.2 ppb (14) | N/A | 13.0 ppb (13) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 3.6 μg/m3 (16) | 33.0 | |
| Feb. 23, 2021, 4 a.m. | N/A | 15.3 ppb (15) | N/A | 13.0 ppb (13) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.4 μg/m3 (10) | 35.0 | |
| Feb. 23, 2021, 3 a.m. | N/A | 16.5 ppb (16) | N/A | 16.0 ppb (16) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 5.5 μg/m3 (23) | 29.0 | |
| Feb. 23, 2021, 2 a.m. | N/A | 18.0 ppb (17) | N/A | 14.0 ppb (14) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.0 μg/m3 (9) | 35.0 | |
| Feb. 23, 2021, 1 a.m. | N/A | 20.2 ppb (20) | N/A | 14.0 ppb (14) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 3.4 μg/m3 (15) | 38.0 | |
| Feb. 23, 2021, midnight | N/A | 24.5 ppb (24) | N/A | 13.0 ppb (13) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 1.8 μg/m3 (8) | 41.0 | |
| Feb. 22, 2021, 11 p.m. | N/A | 28.0 ppb (27) | N/A | 13.0 ppb (13) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 1.4 μg/m3 (6) | 43.0 | |
| Feb. 22, 2021, 10 p.m. | N/A | 30.5 ppb (29) | N/A | 14.0 ppb (14) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 2.1 μg/m3 (9) | 39.0 | |
| Feb. 22, 2021, 9 p.m. | N/A | 32.4 ppb (31) | N/A | 14.0 ppb (14) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 4.2 μg/m3 (18) | 37.0 | |
| Feb. 22, 2021, 8 p.m. | N/A | 35.7 ppb (34) | N/A | 16.0 ppb (16) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 5.2 μg/m3 (22) | 34.0 | |
| Feb. 22, 2021, 7 p.m. | N/A | 34.2 ppb (33) | N/A | 12.0 ppb (12) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 2.8 μg/m3 (12) | 33.0 | |
| Feb. 22, 2021, 6 p.m. | N/A | 35.5 ppb (34) | N/A | 13.0 ppb (13) | N/A | N/A | 24.0 ppb (23) | N/A | N/A | 2.4 μg/m3 (10) | 34.0 | |
| Feb. 22, 2021, 5 p.m. | N/A | 36.2 ppb (35) | N/A | 14.0 ppb (14) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 1.9 μg/m3 (8) | 35.0 | |
| Feb. 22, 2021, 4 p.m. | N/A | 33.5 ppb (32) | N/A | 14.0 ppb (14) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 2.8 μg/m3 (12) | 32.0 |