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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 17, 2021, 6 p.m. | N/A | 37.8 ppb (36) | N/A | 10.0 ppb (10) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 3.9 μg/m3 (17) | 36.0 | |
| May 17, 2021, 5 p.m. | N/A | 38.2 ppb (37) | N/A | 10.0 ppb (10) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 5.8 μg/m3 (25) | 37.0 | |
| May 17, 2021, 4 p.m. | N/A | 38.2 ppb (37) | N/A | 9.0 ppb (9) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.1 μg/m3 (13) | 37.0 | |
| May 17, 2021, noon | N/A | 46.3 ppb (44) | N/A | 7.0 ppb (7) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 2.1 μg/m3 (9) | 44.0 | |
| May 17, 2021, 11 a.m. | N/A | 46.6 ppb (44) | N/A | 6.0 ppb (6) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 2.2 μg/m3 (10) | 44.0 | |
| May 17, 2021, 10 a.m. | N/A | 45.7 ppb (44) | N/A | 6.0 ppb (6) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 2.7 μg/m3 (12) | 44.0 | |
| May 17, 2021, 5 a.m. | N/A | 40.3 ppb (39) | N/A | 6.0 ppb (6) | N/A | N/A | 20.0 ppb (19) | N/A | N/A | 2.7 μg/m3 (12) | 39.0 | |
| May 17, 2021, 4 a.m. | N/A | 40.2 ppb (38) | N/A | 7.0 ppb (7) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 2.8 μg/m3 (12) | 38.0 | |
| May 16, 2021, 11 p.m. | N/A | 53.3 ppb (51) | N/A | 9.0 ppb (9) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 3.4 μg/m3 (15) | 51.0 | |
| May 16, 2021, 10 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 | |
| May 16, 2021, 5 p.m. | N/A | 58.8 ppb (57) | N/A | 6.0 ppb (6) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 1.7 μg/m3 (8) | 57.0 | |
| May 16, 2021, 4 p.m. | N/A | 58.9 ppb (57) | N/A | 5.0 ppb (5) | N/A | N/A | 15.0 ppb (14) | N/A | N/A | 2.1 μg/m3 (9) | 57.0 | |
| May 16, 2021, 10 a.m. | N/A | 49.6 ppb (47) | N/A | 5.0 ppb (5) | N/A | N/A | 7.0 ppb (7) | N/A | N/A | 5.1 μg/m3 (22) | 47.0 | |
| May 16, 2021, 9 a.m. | N/A | 45.7 ppb (44) | N/A | 6.0 ppb (6) | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 5.1 μg/m3 (22) | 44.0 | |
| May 16, 2021, 8 a.m. | N/A | 41.7 ppb (40) | N/A | 7.0 ppb (7) | N/A | N/A | 12.0 ppb (12) | N/A | N/A | 4.7 μg/m3 (20) | 40.0 | |
| May 16, 2021, 7 a.m. | N/A | 37.8 ppb (36) | N/A | 8.0 ppb (8) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 2.6 μg/m3 (11) | 36.0 | |
| May 16, 2021, 6 a.m. | N/A | 33.9 ppb (32) | N/A | 7.0 ppb (7) | N/A | N/A | 22.0 ppb (21) | N/A | N/A | 1.5 μg/m3 (7) | 32.0 | |
| May 16, 2021, 5 a.m. | N/A | 30.6 ppb (29) | N/A | 7.0 ppb (7) | N/A | N/A | 24.0 ppb (23) | N/A | N/A | 1.7 μg/m3 (8) | 29.0 | |
| May 16, 2021, 4 a.m. | N/A | 28.7 ppb (28) | N/A | 7.0 ppb (7) | N/A | N/A | 25.0 ppb (24) | N/A | N/A | 2.1 μg/m3 (9) | 28.0 | |
| May 16, 2021, 3 a.m. | N/A | 28.0 ppb (27) | N/A | 8.0 ppb (8) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 2.3 μg/m3 (10) | 27.0 | |
| May 16, 2021, 2 a.m. | N/A | 29.7 ppb (29) | N/A | 9.0 ppb (9) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.7 μg/m3 (16) | 32.0 | |
| May 16, 2021, 1 a.m. | N/A | 31.5 ppb (30) | N/A | 10.0 ppb (10) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 4.3 μg/m3 (18) | 35.0 | |
| May 16, 2021, midnight | N/A | 32.0 ppb (31) | N/A | 10.0 ppb (10) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 4.6 μg/m3 (20) | 36.0 | |
| May 15, 2021, 11 p.m. | N/A | 33.6 ppb (32) | N/A | 11.0 ppb (11) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 4.7 μg/m3 (20) | 38.0 | |
| May 15, 2021, 10 p.m. | N/A | 36.5 ppb (35) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 5.0 μg/m3 (21) | 38.0 | |
| May 15, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.9 μg/m3 (21) | 21.0 | |
| May 15, 2021, 8 p.m. | N/A | 42.0 ppb (40) | N/A | 11.0 ppb (11) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 4.2 μg/m3 (18) | 40.0 | |
| May 15, 2021, 7 p.m. | N/A | 43.5 ppb (42) | N/A | 11.0 ppb (11) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 3.9 μg/m3 (17) | 42.0 | |
| May 15, 2021, 6 p.m. | N/A | 44.2 ppb (42) | N/A | 10.0 ppb (10) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 3.0 μg/m3 (13) | 42.0 | |
| May 15, 2021, 5 p.m. | N/A | 44.0 ppb (42) | N/A | 8.0 ppb (8) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.2 μg/m3 (14) | 42.0 | |
| May 15, 2021, 4 p.m. | N/A | 42.5 ppb (41) | N/A | 6.0 ppb (6) | N/A | N/A | 24.0 ppb (23) | N/A | N/A | 3.2 μg/m3 (14) | 41.0 | |
| May 15, 2021, 3 p.m. | N/A | 39.8 ppb (38) | N/A | 5.0 ppb (5) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 3.4 μg/m3 (15) | 38.0 | |
| May 15, 2021, 2 p.m. | N/A | 38.0 ppb (36) | N/A | 5.0 ppb (5) | N/A | N/A | 14.0 ppb (13) | N/A | N/A | 3.5 μg/m3 (15) | 36.0 | |
| May 15, 2021, 1 p.m. | N/A | 36.6 ppb (35) | N/A | 6.0 ppb (6) | N/A | N/A | 7.0 ppb (7) | N/A | N/A | 6.9 μg/m3 (29) | 35.0 | |
| May 15, 2021, noon | N/A | 35.9 ppb (34) | N/A | 6.0 ppb (6) | N/A | N/A | 7.0 ppb (7) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 11 a.m. | N/A | 35.3 ppb (34) | N/A | 6.0 ppb (6) | N/A | N/A | 7.0 ppb (7) | N/A | N/A | 8.2 μg/m3 (35) | 35.0 | |
| May 15, 2021, 10 a.m. | N/A | 34.9 ppb (33) | N/A | 8.0 ppb (8) | N/A | N/A | 8.0 ppb (8) | N/A | N/A | 9.9 μg/m3 (42) | 42.0 | |
| May 15, 2021, 9 a.m. | N/A | 33.7 ppb (32) | N/A | 8.0 ppb (8) | N/A | N/A | 10.0 ppb (10) | N/A | N/A | 11.1 μg/m3 (47) | 47.0 | |
| May 15, 2021, 8 a.m. | N/A | 31.5 ppb (30) | N/A | 9.0 ppb (9) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 7 a.m. | N/A | 30.4 ppb (29) | N/A | 8.0 ppb (8) | N/A | N/A | 19.0 ppb (18) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| May 15, 2021, 6 a.m. | N/A | 29.7 ppb (29) | N/A | 10.0 ppb (10) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 3.4 μg/m3 (15) | 29.0 | |
| May 15, 2021, 5 a.m. | N/A | 29.2 ppb (28) | N/A | 12.0 ppb (12) | N/A | N/A | 20.0 ppb (19) | N/A | N/A | 3.1 μg/m3 (13) | 28.0 | |
| May 15, 2021, 4 a.m. | N/A | 29.0 ppb (28) | N/A | 12.0 ppb (12) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 3.2 μg/m3 (14) | 28.0 | |
| May 15, 2021, 3 a.m. | N/A | 29.5 ppb (28) | N/A | 10.0 ppb (10) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.2 μg/m3 (14) | 35.0 | |
| May 15, 2021, 2 a.m. | N/A | 31.3 ppb (30) | N/A | 10.0 ppb (10) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.2 μg/m3 (14) | 38.0 | |
| May 15, 2021, 1 a.m. | N/A | 34.7 ppb (33) | N/A | 11.0 ppb (11) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 3.3 μg/m3 (14) | 39.0 | |
| May 15, 2021, midnight | N/A | 36.8 ppb (35) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.7 μg/m3 (16) | 38.0 | |
| May 14, 2021, 11 p.m. | N/A | 38.9 ppb (37) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.7 μg/m3 (16) | 38.0 | |
| May 14, 2021, 10 p.m. | N/A | 41.8 ppb (40) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.9 μg/m3 (17) | 40.0 | |
| May 14, 2021, 9 p.m. | N/A | 44.5 ppb (42) | N/A | 12.0 ppb (12) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.9 μg/m3 (17) | 42.0 | |
| May 14, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.4 μg/m3 (15) | 15.0 | |
| May 14, 2021, 7 p.m. | N/A | 48.3 ppb (46) | N/A | 11.0 ppb (11) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 3.2 μg/m3 (14) | 46.0 | |
| May 14, 2021, 6 p.m. | N/A | 48.9 ppb (47) | N/A | 10.0 ppb (10) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.3 μg/m3 (14) | 47.0 | |
| May 14, 2021, 5 p.m. | N/A | 49.3 ppb (47) | N/A | 10.0 ppb (10) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 2.3 μg/m3 (10) | 47.0 | |
| May 14, 2021, 4 p.m. | N/A | 48.7 ppb (46) | N/A | 9.0 ppb (9) | N/A | N/A | 25.0 ppb (24) | N/A | N/A | 3.3 μg/m3 (14) | 46.0 | |
| May 14, 2021, 3 p.m. | N/A | 46.6 ppb (44) | N/A | 7.0 ppb (7) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 4.9 μg/m3 (21) | 44.0 | |
| May 14, 2021, 2 p.m. | N/A | 45.3 ppb (43) | N/A | 6.0 ppb (6) | N/A | N/A | 15.0 ppb (14) | N/A | N/A | 2.5 μg/m3 (11) | 43.0 | |
| May 14, 2021, 1 p.m. | N/A | 44.4 ppb (42) | N/A | 7.0 ppb (7) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 2.7 μg/m3 (12) | 42.0 | |
| May 14, 2021, noon | N/A | 41.4 ppb (40) | N/A | 6.0 ppb (6) | N/A | N/A | 8.0 ppb (8) | N/A | N/A | 2.2 μg/m3 (10) | 40.0 | |
| May 14, 2021, 11 a.m. | N/A | 39.2 ppb (37) | N/A | 8.0 ppb (8) | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 1.9 μg/m3 (8) | 37.0 | |
| May 14, 2021, 10 a.m. | N/A | 35.2 ppb (34) | N/A | 8.0 ppb (8) | N/A | N/A | 16.0 ppb (15) | N/A | N/A | 3.3 μg/m3 (14) | 34.0 | |
| May 14, 2021, 9 a.m. | N/A | 30.2 ppb (29) | N/A | 8.0 ppb (8) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 2.0 μg/m3 (9) | 29.0 | |
| May 14, 2021, 8 a.m. | N/A | 26.0 ppb (25) | N/A | 9.0 ppb (9) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 3.2 μg/m3 (14) | 25.0 | |
| May 14, 2021, 7 a.m. | N/A | 23.5 ppb (23) | N/A | 9.0 ppb (9) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 2.8 μg/m3 (12) | 32.0 | |
| May 14, 2021, 6 a.m. | N/A | 23.5 ppb (23) | N/A | 9.0 ppb (9) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 2.2 μg/m3 (10) | 36.0 | |
| May 14, 2021, 5 a.m. | N/A | 24.1 ppb (23) | N/A | 9.0 ppb (9) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.7 μg/m3 (16) | 35.0 | |
| May 14, 2021, 4 a.m. | N/A | 24.6 ppb (24) | N/A | 10.0 ppb (10) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 3.1 μg/m3 (13) | 28.0 | |
| May 14, 2021, 3 a.m. | N/A | 24.7 ppb (24) | N/A | 10.0 ppb (10) | N/A | N/A | 35.0 ppb (33) | N/A | N/A | 5.5 μg/m3 (23) | 33.0 | |
| May 14, 2021, 2 a.m. | N/A | 28.5 ppb (27) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 3.4 μg/m3 (15) | 37.0 | |
| May 14, 2021, 1 a.m. | N/A | 31.0 ppb (30) | N/A | 11.0 ppb (11) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 4.3 μg/m3 (18) | 38.0 | |
| May 14, 2021, midnight | N/A | 33.3 ppb (32) | N/A | 11.0 ppb (11) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 4.2 μg/m3 (18) | 39.0 | |
| May 13, 2021, 11 p.m. | N/A | 36.1 ppb (35) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 5.3 μg/m3 (23) | 38.0 | |
| May 13, 2021, 10 p.m. | N/A | 39.1 ppb (37) | N/A | 11.0 ppb (11) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 4.3 μg/m3 (18) | 39.0 | |
| May 13, 2021, 9 p.m. | N/A | 42.7 ppb (41) | N/A | 11.0 ppb (11) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 3.7 μg/m3 (16) | 41.0 | |
| May 13, 2021, 8 p.m. | N/A | 45.2 ppb (43) | N/A | 10.0 ppb (10) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.9 μg/m3 (17) | 43.0 | |
| May 13, 2021, 7 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 | |
| May 13, 2021, 6 p.m. | N/A | 50.4 ppb (48) | N/A | 8.0 ppb (8) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 4.7 μg/m3 (20) | 48.0 | |
| May 13, 2021, 5 p.m. | N/A | 51.1 ppb (49) | N/A | 6.0 ppb (6) | N/A | N/A | 23.0 ppb (22) | N/A | N/A | 2.7 μg/m3 (12) | 49.0 | |
| May 13, 2021, 4 p.m. | N/A | 53.3 ppb (51) | N/A | 5.0 ppb (5) | N/A | N/A | 14.0 ppb (13) | N/A | N/A | 3.2 μg/m3 (14) | 51.0 | |
| May 13, 2021, 3 p.m. | N/A | 51.6 ppb (49) | N/A | 4.0 ppb (4) | N/A | N/A | 9.0 ppb (9) | N/A | N/A | 2.0 μg/m3 (9) | 49.0 | |
| May 13, 2021, 2 p.m. | N/A | 49.7 ppb (47) | N/A | 4.0 ppb (4) | N/A | N/A | 5.0 ppb (5) | N/A | N/A | 2.2 μg/m3 (10) | 47.0 | |
| May 13, 2021, 1 p.m. | N/A | 48.9 ppb (47) | N/A | 5.0 ppb (5) | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 3.6 μg/m3 (16) | 47.0 | |
| May 13, 2021, noon | N/A | 47.7 ppb (45) | N/A | 4.0 ppb (4) | N/A | N/A | 3.0 ppb (3) | N/A | N/A | 3.7 μg/m3 (16) | 45.0 | |
| May 13, 2021, 11 a.m. | N/A | 48.8 ppb (47) | N/A | 5.0 ppb (5) | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 3.8 μg/m3 (16) | 47.0 | |
| May 13, 2021, 10 a.m. | N/A | 48.3 ppb (46) | N/A | 5.0 ppb (5) | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 4.2 μg/m3 (18) | 46.0 | |
| May 13, 2021, 9 a.m. | N/A | 47.6 ppb (45) | N/A | 5.0 ppb (5) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 4.7 μg/m3 (20) | 45.0 | |
| May 13, 2021, 8 a.m. | N/A | 45.5 ppb (43) | N/A | 6.0 ppb (6) | N/A | N/A | 8.0 ppb (8) | N/A | N/A | 4.5 μg/m3 (19) | 43.0 | |
| May 13, 2021, 7 a.m. | N/A | 43.2 ppb (41) | N/A | 8.0 ppb (8) | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 4.5 μg/m3 (19) | 41.0 | |
| May 13, 2021, 6 a.m. | N/A | 40.9 ppb (39) | N/A | 9.0 ppb (9) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 4.8 μg/m3 (20) | 39.0 | |
| May 13, 2021, 5 a.m. | N/A | 38.9 ppb (37) | N/A | 11.0 ppb (11) | N/A | N/A | 16.0 ppb (15) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| May 13, 2021, 4 a.m. | N/A | 37.2 ppb (36) | N/A | 10.0 ppb (10) | N/A | N/A | 23.0 ppb (22) | N/A | N/A | 3.9 μg/m3 (17) | 36.0 | |
| May 13, 2021, 3 a.m. | N/A | 36.7 ppb (35) | N/A | 11.0 ppb (11) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 3.5 μg/m3 (15) | 35.0 | |
| May 13, 2021, 2 a.m. | N/A | 36.5 ppb (35) | N/A | 11.0 ppb (11) | N/A | N/A | 34.0 ppb (32) | N/A | N/A | 3.4 μg/m3 (15) | 35.0 | |
| May 13, 2021, 1 a.m. | N/A | 36.9 ppb (35) | N/A | 11.0 ppb (11) | N/A | N/A | 36.0 ppb (34) | N/A | N/A | 4.8 μg/m3 (20) | 35.0 | |
| May 13, 2021, midnight | N/A | 38.7 ppb (37) | N/A | 11.0 ppb (11) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| May 12, 2021, 11 p.m. | N/A | 38.8 ppb (37) | N/A | 12.0 ppb (12) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| May 12, 2021, 10 p.m. | N/A | 40.1 ppb (38) | N/A | 11.0 ppb (11) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.7 μg/m3 (16) | 38.0 | |
| May 12, 2021, 9 p.m. | N/A | 41.3 ppb (39) | N/A | 12.0 ppb (12) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 3.8 μg/m3 (16) | 39.0 | |
| May 12, 2021, 8 p.m. | N/A | 42.4 ppb (40) | N/A | 11.0 ppb (11) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.3 μg/m3 (14) | 40.0 | |
| May 12, 2021, 7 p.m. | N/A | 44.0 ppb (42) | N/A | 11.0 ppb (11) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 2.9 μg/m3 (13) | 42.0 | |
| May 12, 2021, 6 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 | |
| May 12, 2021, 5 p.m. | N/A | 43.7 ppb (42) | N/A | 8.0 ppb (8) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 3.5 μg/m3 (15) | 42.0 | |
| May 12, 2021, 4 p.m. | N/A | 44.5 ppb (42) | N/A | 10.0 ppb (10) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 9.5 μg/m3 (40) | 42.0 | |
| May 12, 2021, 3 p.m. | N/A | 44.8 ppb (43) | N/A | 10.0 ppb (10) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 5.9 μg/m3 (25) | 43.0 | |
| May 12, 2021, 2 p.m. | N/A | 44.2 ppb (42) | N/A | 10.0 ppb (10) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 7.7 μg/m3 (33) | 42.0 | |
| May 12, 2021, 1 p.m. | N/A | 41.6 ppb (40) | N/A | 10.0 ppb (10) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 6.9 μg/m3 (29) | 40.0 | |
| May 12, 2021, noon | N/A | 39.3 ppb (38) | N/A | 9.0 ppb (9) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 5.4 μg/m3 (23) | 38.0 | |
| May 12, 2021, 11 a.m. | N/A | 36.4 ppb (35) | N/A | 8.0 ppb (8) | N/A | N/A | 22.0 ppb (21) | N/A | N/A | 5.8 μg/m3 (25) | 35.0 | |
| May 12, 2021, 10 a.m. | N/A | 33.5 ppb (32) | N/A | 7.0 ppb (7) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 4.5 μg/m3 (19) | 32.0 | |
| May 12, 2021, 9 a.m. | N/A | 30.7 ppb (29) | N/A | 7.0 ppb (7) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 4.1 μg/m3 (18) | 29.0 | |
| May 12, 2021, 8 a.m. | N/A | 27.7 ppb (27) | N/A | 8.0 ppb (8) | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 4.0 μg/m3 (17) | 27.0 | |
| May 12, 2021, 7 a.m. | N/A | 25.2 ppb (24) | N/A | 8.0 ppb (8) | N/A | N/A | 26.0 ppb (25) | N/A | N/A | 2.8 μg/m3 (12) | 25.0 | |
| May 12, 2021, 6 a.m. | N/A | 24.1 ppb (23) | N/A | 10.0 ppb (10) | N/A | N/A | 24.0 ppb (23) | N/A | N/A | 4.2 μg/m3 (18) | 23.0 | |
| May 12, 2021, 5 a.m. | N/A | 22.8 ppb (22) | N/A | 10.0 ppb (10) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 5.5 μg/m3 (23) | 26.0 | |
| May 12, 2021, 4 a.m. | N/A | 22.6 ppb (22) | N/A | 11.0 ppb (11) | N/A | N/A | 30.0 ppb (28) | N/A | N/A | 5.2 μg/m3 (22) | 28.0 | |
| May 12, 2021, 3 a.m. | N/A | 22.1 ppb (21) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 3.1 μg/m3 (13) | 38.0 | |
| May 12, 2021, 2 a.m. | N/A | 22.7 ppb (22) | N/A | 11.0 ppb (11) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 3.0 μg/m3 (13) | 43.0 | |
| May 12, 2021, 1 a.m. | N/A | 24.5 ppb (24) | N/A | 11.0 ppb (11) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 3.3 μg/m3 (14) | 45.0 | |
| May 12, 2021, midnight | N/A | 26.1 ppb (25) | N/A | 12.0 ppb (12) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 3.8 μg/m3 (16) | 45.0 | |
| May 11, 2021, 11 p.m. | N/A | 26.6 ppb (26) | N/A | 12.0 ppb (12) | N/A | N/A | 48.0 ppb (45) | N/A | N/A | 3.9 μg/m3 (17) | 45.0 | |
| May 11, 2021, 10 p.m. | N/A | 29.3 ppb (28) | N/A | 12.0 ppb (12) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 3.0 μg/m3 (13) | 43.0 | |
| May 11, 2021, 9 p.m. | N/A | 30.3 ppb (29) | N/A | 11.0 ppb (11) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 2.7 μg/m3 (12) | 43.0 | |
| May 11, 2021, 8 p.m. | N/A | 32.8 ppb (31) | N/A | 11.0 ppb (11) | N/A | N/A | 46.0 ppb (43) | N/A | N/A | 2.7 μg/m3 (12) | 43.0 | |
| May 11, 2021, 7 p.m. | N/A | 37.0 ppb (35) | N/A | 10.0 ppb (10) | N/A | N/A | 44.0 ppb (41) | N/A | N/A | 2.2 μg/m3 (10) | 41.0 | |
| May 11, 2021, 6 p.m. | N/A | 41.6 ppb (40) | N/A | 9.0 ppb (9) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 1.9 μg/m3 (8) | 40.0 | |
| May 11, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.5 μg/m3 (7) | 7.0 | |
| May 11, 2021, 4 p.m. | N/A | 44.6 ppb (43) | N/A | 5.0 ppb (5) | N/A | N/A | 20.0 ppb (19) | N/A | N/A | 1.4 μg/m3 (6) | 43.0 | |
| May 11, 2021, 3 p.m. | N/A | 40.8 ppb (39) | N/A | 5.0 ppb (5) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 1.2 μg/m3 (5) | 39.0 | |
| May 11, 2021, 2 p.m. | N/A | 36.8 ppb (35) | N/A | 4.0 ppb (4) | N/A | N/A | 10.0 ppb (10) | N/A | N/A | 1.0 μg/m3 (5) | 35.0 | |
| May 11, 2021, 1 p.m. | N/A | 33.9 ppb (32) | N/A | 6.0 ppb (6) | N/A | N/A | 5.0 ppb (5) | N/A | N/A | 1.5 μg/m3 (7) | 32.0 | |
| May 11, 2021, noon | N/A | 28.7 ppb (28) | N/A | 6.0 ppb (6) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 1.5 μg/m3 (7) | 28.0 | |
| May 11, 2021, 11 a.m. | N/A | 24.8 ppb (24) | N/A | 4.0 ppb (4) | N/A | N/A | 10.0 ppb (10) | N/A | N/A | 1.0 μg/m3 (5) | 24.0 | |
| May 11, 2021, 10 a.m. | N/A | 22.8 ppb (22) | N/A | 5.0 ppb (5) | N/A | N/A | 12.0 ppb (12) | N/A | N/A | 0.9 μg/m3 (4) | 22.0 | |
| May 11, 2021, 9 a.m. | N/A | 21.8 ppb (21) | N/A | 5.0 ppb (5) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 1.2 μg/m3 (5) | 21.0 | |
| May 11, 2021, 8 a.m. | N/A | 21.2 ppb (20) | N/A | 7.0 ppb (7) | N/A | N/A | 15.0 ppb (14) | N/A | N/A | 2.2 μg/m3 (10) | 20.0 | |
| May 11, 2021, 7 a.m. | N/A | 20.8 ppb (20) | N/A | 9.0 ppb (9) | N/A | N/A | 14.0 ppb (13) | N/A | N/A | 7.6 μg/m3 (32) | 32.0 | |
| May 11, 2021, 6 a.m. | N/A | 19.8 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 1.7 μg/m3 (8) | 20.0 | |
| May 11, 2021, 5 a.m. | N/A | 19.4 ppb (19) | N/A | 11.0 ppb (11) | N/A | N/A | 19.0 ppb (18) | N/A | N/A | 2.0 μg/m3 (9) | 19.0 | |
| May 11, 2021, 4 a.m. | N/A | 18.7 ppb (18) | N/A | 10.0 ppb (10) | N/A | N/A | 28.0 ppb (26) | N/A | N/A | 2.5 μg/m3 (11) | 26.0 | |
| May 11, 2021, 3 a.m. | N/A | 19.9 ppb (19) | N/A | 9.0 ppb (9) | N/A | N/A | 37.0 ppb (35) | N/A | N/A | 2.1 μg/m3 (9) | 35.0 | |
| May 11, 2021, 2 a.m. | N/A | 21.9 ppb (21) | 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 | |
| May 11, 2021, 1 a.m. | N/A | 24.5 ppb (24) | N/A | 11.0 ppb (11) | N/A | N/A | 45.0 ppb (42) | N/A | N/A | 1.3 μg/m3 (6) | 42.0 | |
| May 11, 2021, midnight | N/A | 27.2 ppb (26) | N/A | 11.0 ppb (11) | N/A | N/A | 42.0 ppb (39) | N/A | N/A | 1.5 μg/m3 (7) | 39.0 | |
| May 10, 2021, 11 p.m. | N/A | 29.1 ppb (28) | N/A | 11.0 ppb (11) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 1.5 μg/m3 (7) | 40.0 | |
| May 10, 2021, 10 p.m. | N/A | 32.3 ppb (31) | N/A | 12.0 ppb (12) | N/A | N/A | 43.0 ppb (40) | N/A | N/A | 1.1 μg/m3 (5) | 40.0 | |
| May 10, 2021, 9 p.m. | N/A | 34.9 ppb (33) | 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 | |
| May 10, 2021, 8 p.m. | N/A | 37.7 ppb (36) | N/A | 11.0 ppb (11) | N/A | N/A | 41.0 ppb (38) | N/A | N/A | 1.6 μg/m3 (7) | 38.0 | |
| May 10, 2021, 7 p.m. | N/A | 41.0 ppb (39) | N/A | 10.0 ppb (10) | N/A | N/A | 40.0 ppb (38) | N/A | N/A | 0.9 μg/m3 (4) | 39.0 | |
| May 10, 2021, 6 p.m. | N/A | 43.5 ppb (42) | N/A | 9.0 ppb (9) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.1 μg/m3 (5) | 42.0 | |
| May 10, 2021, 5 p.m. | N/A | 45.3 ppb (43) | N/A | 8.0 ppb (8) | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 1.0 μg/m3 (5) | 43.0 | |
| May 10, 2021, 4 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 | |
| May 10, 2021, 3 p.m. | N/A | 47.4 ppb (45) | N/A | 7.0 ppb (7) | N/A | N/A | 20.0 ppb (19) | N/A | N/A | 6.0 μg/m3 (25) | 45.0 | |
| May 10, 2021, 2 p.m. | N/A | 47.0 ppb (45) | N/A | 6.0 ppb (6) | N/A | N/A | 8.0 ppb (8) | N/A | N/A | 8.6 μg/m3 (36) | 45.0 | |
| May 10, 2021, 1 p.m. | N/A | 45.0 ppb (43) | N/A | 6.0 ppb (6) | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 6.4 μg/m3 (27) | 43.0 | |
| May 10, 2021, noon | N/A | 43.0 ppb (41) | N/A | 5.0 ppb (5) | N/A | N/A | 6.0 ppb (6) | N/A | N/A | 4.0 μg/m3 (17) | 41.0 | |
| May 10, 2021, 11 a.m. | N/A | 41.8 ppb (40) | N/A | 4.0 ppb (4) | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 1.3 μg/m3 (6) | 40.0 | |
| May 10, 2021, 10 a.m. | N/A | 40.5 ppb (39) | N/A | 4.0 ppb (4) | N/A | N/A | 12.0 ppb (12) | N/A | N/A | 2.5 μg/m3 (11) | 39.0 | |
| May 10, 2021, 9 a.m. | N/A | 38.6 ppb (37) | N/A | 5.0 ppb (5) | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 2.9 μg/m3 (13) | 37.0 | |
| May 10, 2021, 8 a.m. | N/A | 36.1 ppb (35) | N/A | 6.0 ppb (6) | N/A | N/A | 14.0 ppb (13) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| May 10, 2021, 7 a.m. | N/A | 33.1 ppb (32) | N/A | 6.0 ppb (6) | N/A | N/A | 13.0 ppb (13) | N/A | N/A | 31.6 μg/m3 (93) | 93.0 | |
| May 10, 2021, 6 a.m. | N/A | 29.6 ppb (28) | N/A | 6.0 ppb (6) | N/A | N/A | 17.0 ppb (16) | N/A | N/A | 4.7 μg/m3 (20) | 28.0 | |
| May 10, 2021, 5 a.m. | N/A | 27.0 ppb (26) | N/A | 7.0 ppb (7) | N/A | N/A | 18.0 ppb (17) | N/A | N/A | 34.2 μg/m3 (98) | 98.0 | |
| May 10, 2021, 4 a.m. | N/A | 24.3 ppb (23) | N/A | 8.0 ppb (8) | N/A | N/A | 21.0 ppb (20) | N/A | N/A | 7.7 μg/m3 (33) | 33.0 | |
| May 10, 2021, 3 a.m. | N/A | 22.7 ppb (22) | N/A | 9.0 ppb (9) | N/A | N/A | 31.0 ppb (29) | N/A | N/A | 2.8 μg/m3 (12) | 29.0 | |
| May 10, 2021, 2 a.m. | N/A | 23.2 ppb (22) | N/A | 9.0 ppb (9) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 3.1 μg/m3 (13) | 36.0 | |
| May 10, 2021, 1 a.m. | N/A | 26.6 ppb (26) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 2.1 μg/m3 (9) | 37.0 | |
| May 10, 2021, midnight | N/A | 28.0 ppb (27) | N/A | 10.0 ppb (10) | N/A | N/A | 39.0 ppb (37) | N/A | N/A | 1.8 μg/m3 (8) | 37.0 | |
| May 9, 2021, 11 p.m. | N/A | 31.6 ppb (30) | N/A | 10.0 ppb (10) | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 2.2 μg/m3 (10) | 36.0 |