Danbury (Germantown) CT, US: 41.4014, -73.4447
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 21, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 13.1 μg/m3 (13) | 7.0 μg/m3 (30) | 35.0 | |
| April 21, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 20.6 μg/m3 (20) | 10.3 μg/m3 (43) | 55.0 | |
| April 21, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 20.9 μg/m3 (20) | 10.3 μg/m3 (43) | 51.0 | |
| April 21, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | N/A | N/A | N/A | 48.0 | |
| April 21, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 19.1 μg/m3 (18) | 8.8 μg/m3 (37) | 47.0 | |
| April 21, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 18.4 μg/m3 (18) | 8.3 μg/m3 (35) | 45.0 | |
| April 21, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 18.5 μg/m3 (18) | 8.2 μg/m3 (35) | 42.0 | |
| April 21, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 19.9 μg/m3 (19) | 9.0 μg/m3 (38) | 38.0 | |
| April 21, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 21.2 μg/m3 (20) | 8.9 μg/m3 (38) | 38.0 | |
| April 21, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 13.0 μg/m3 (13) | 6.7 μg/m3 (28) | 28.0 | |
| April 21, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 13.3 μg/m3 (13) | 7.1 μg/m3 (30) | 30.0 | |
| April 21, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 12.5 μg/m3 (12) | 7.0 μg/m3 (30) | 30.0 | |
| April 21, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 11.2 μg/m3 (11) | 5.6 μg/m3 (24) | 24.0 | |
| April 21, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 9.6 μg/m3 (9) | 5.3 μg/m3 (23) | 30.0 | |
| April 21, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.1 μg/m3 (11) | 5.6 μg/m3 (24) | 24.0 | |
| April 21, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 10.5 μg/m3 (10) | 5.8 μg/m3 (25) | 30.0 | |
| April 21, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 12.0 μg/m3 (12) | 5.7 μg/m3 (24) | 31.0 | |
| April 21, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 17.5 μg/m3 (17) | 8.8 μg/m3 (37) | 37.0 | |
| April 21, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 20.6 μg/m3 (20) | 9.6 μg/m3 (40) | 40.0 | |
| April 21, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 20.8 μg/m3 (20) | 9.9 μg/m3 (42) | 47.0 | |
| April 20, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 21.7 μg/m3 (21) | 10.1 μg/m3 (43) | 49.0 | |
| April 20, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (58) | N/A | 23.0 μg/m3 (22) | 9.4 μg/m3 (40) | 58.0 | |
| April 20, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (58) | N/A | 20.1 μg/m3 (19) | 7.6 μg/m3 (32) | 58.0 | |
| April 20, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | N/A | 20.8 μg/m3 (20) | 8.0 μg/m3 (34) | 61.0 | |
| April 20, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 18.4 μg/m3 (18) | 7.5 μg/m3 (32) | 55.0 | |
| April 20, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 22.3 μg/m3 (21) | 7.0 μg/m3 (30) | 51.0 | |
| April 20, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 23.2 μg/m3 (22) | 7.2 μg/m3 (31) | 50.0 | |
| April 20, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 17.7 μg/m3 (17) | 7.5 μg/m3 (32) | 47.0 | |
| April 20, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 17.3 μg/m3 (17) | 7.5 μg/m3 (32) | 44.0 | |
| April 20, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 15.0 μg/m3 (14) | 7.3 μg/m3 (31) | 39.0 | |
| April 20, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 14.8 μg/m3 (14) | 7.8 μg/m3 (33) | 37.0 | |
| April 20, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | N/A | 31.0 μg/m3 (29) | 14.0 μg/m3 (55) | 55.0 | |
| April 20, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 26.6 μg/m3 (25) | 12.4 μg/m3 (52) | 52.0 | |
| April 20, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 21.2 μg/m3 (20) | 11.0 μg/m3 (46) | 46.0 | |
| April 20, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 21.9 μg/m3 (21) | 13.1 μg/m3 (54) | 54.0 | |
| April 20, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 19.8 μg/m3 (19) | 12.1 μg/m3 (51) | 51.0 | |
| April 20, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 26.7 μg/m3 (25) | 16.6 μg/m3 (61) | 61.0 | |
| April 20, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 17.0 μg/m3 (16) | 10.6 μg/m3 (45) | 45.0 | |
| April 20, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 μg/m3 (21) | 14.9 μg/m3 (57) | 57.0 | |
| April 20, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 14.1 μg/m3 (14) | 8.9 μg/m3 (38) | 38.0 | |
| April 20, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 14.6 μg/m3 (14) | 8.4 μg/m3 (36) | 36.0 | |
| April 20, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 12.1 μg/m3 (12) | 7.0 μg/m3 (30) | 30.0 | |
| April 20, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 13.1 μg/m3 (13) | 7.4 μg/m3 (31) | 32.0 | |
| April 20, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 15.1 μg/m3 (14) | 8.3 μg/m3 (35) | 35.0 | |
| April 19, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 13.4 μg/m3 (13) | 6.8 μg/m3 (29) | 37.0 | |
| April 19, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 13.8 μg/m3 (13) | 7.4 μg/m3 (31) | 39.0 | |
| April 19, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 13.5 μg/m3 (13) | 6.7 μg/m3 (28) | 38.0 | |
| April 19, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 11.0 μg/m3 (11) | 5.7 μg/m3 (24) | 38.0 | |
| April 19, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 10.6 μg/m3 (10) | 5.5 μg/m3 (23) | 40.0 | |
| April 19, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 13.0 μg/m3 (13) | 5.7 μg/m3 (24) | 41.0 | |
| April 19, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 10.3 μg/m3 (10) | 5.0 μg/m3 (21) | 41.0 | |
| April 19, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 9.8 μg/m3 (10) | 4.5 μg/m3 (19) | 41.0 | |
| April 19, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 9.9 μg/m3 (10) | 4.5 μg/m3 (19) | 39.0 | |
| April 19, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 11.5 μg/m3 (11) | 4.8 μg/m3 (20) | 36.0 | |
| April 19, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 23.9 μg/m3 (23) | 8.3 μg/m3 (35) | 35.0 | |
| April 19, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 27.5 μg/m3 (26) | 12.3 μg/m3 (52) | 52.0 | |
| April 19, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 35.6 μg/m3 (33) | 12.7 μg/m3 (53) | 53.0 | |
| April 19, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 22.1 μg/m3 (21) | 10.9 μg/m3 (46) | 46.0 | |
| April 19, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 20.2 μg/m3 (19) | 11.3 μg/m3 (48) | 48.0 | |
| April 19, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 19.8 μg/m3 (19) | 11.3 μg/m3 (48) | 48.0 | |
| April 19, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 18.3 μg/m3 (17) | 10.7 μg/m3 (45) | 45.0 | |
| April 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 17.9 μg/m3 (17) | 10.7 μg/m3 (45) | 45.0 | |
| April 19, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.2 μg/m3 (17) | 10.4 μg/m3 (44) | 44.0 | |
| April 19, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | N/A | 16.7 μg/m3 (16) | 9.9 μg/m3 (42) | 42.0 | |
| April 19, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 19.5 μg/m3 (19) | 11.5 μg/m3 (48) | 48.0 | |
| April 19, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 20.2 μg/m3 (19) | 12.7 μg/m3 (53) | 53.0 | |
| April 19, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 15.3 μg/m3 (15) | 8.2 μg/m3 (35) | 35.0 | |
| April 19, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 13.0 μg/m3 (13) | 6.9 μg/m3 (29) | 29.0 | |
| April 18, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 12.8 μg/m3 (12) | 6.9 μg/m3 (29) | 31.0 | |
| April 18, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 12.0 μg/m3 (12) | 6.2 μg/m3 (26) | 31.0 | |
| April 18, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 13.0 μg/m3 (13) | 5.9 μg/m3 (25) | 33.0 | |
| April 18, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 10.7 μg/m3 (10) | 5.5 μg/m3 (23) | 34.0 | |
| April 18, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 10.8 μg/m3 (10) | 5.4 μg/m3 (23) | 36.0 | |
| April 18, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 10.6 μg/m3 (10) | 5.0 μg/m3 (21) | 38.0 | |
| April 18, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 10.2 μg/m3 (10) | 5.0 μg/m3 (21) | 39.0 | |
| April 18, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 10.5 μg/m3 (10) | 5.1 μg/m3 (22) | 39.0 | |
| April 18, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 10.7 μg/m3 (10) | 4.8 μg/m3 (20) | 38.0 | |
| April 18, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 9.7 μg/m3 (9) | 4.9 μg/m3 (21) | 36.0 | |
| April 18, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 9.5 μg/m3 (9) | 5.0 μg/m3 (21) | 32.0 | |
| April 18, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 10.1 μg/m3 (10) | 5.1 μg/m3 (22) | 29.0 | |
| April 18, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 10.5 μg/m3 (10) | 5.6 μg/m3 (24) | 24.0 | |
| April 18, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 11.0 μg/m3 (11) | 5.8 μg/m3 (25) | 25.0 | |
| April 18, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 10.3 μg/m3 (10) | 5.9 μg/m3 (25) | 25.0 | |
| April 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 11.1 μg/m3 (11) | 6.5 μg/m3 (28) | 28.0 | |
| April 18, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 11.4 μg/m3 (11) | 7.3 μg/m3 (31) | 31.0 | |
| April 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 11.1 μg/m3 (11) | 6.5 μg/m3 (28) | 28.0 | |
| April 18, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.7 μg/m3 (10) | 5.9 μg/m3 (25) | 25.0 | |
| April 18, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 13.5 μg/m3 (13) | 8.6 μg/m3 (36) | 36.0 | |
| April 18, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 14.1 μg/m3 (14) | 8.1 μg/m3 (34) | 34.0 | |
| April 18, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 11.9 μg/m3 (12) | 6.9 μg/m3 (29) | 29.0 | |
| April 18, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 11.2 μg/m3 (11) | 6.9 μg/m3 (29) | 29.0 | |
| April 18, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 8.8 μg/m3 (9) | 4.6 μg/m3 (20) | 30.0 | |
| April 17, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 7.8 μg/m3 (8) | 4.0 μg/m3 (17) | 33.0 | |
| April 17, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 6.3 μg/m3 (6) | 3.0 μg/m3 (13) | 33.0 | |
| April 17, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 6.2 μg/m3 (6) | 2.9 μg/m3 (13) | 34.0 | |
| April 17, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 5.5 μg/m3 (6) | 2.8 μg/m3 (12) | 36.0 | |
| April 17, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 3.3 μg/m3 (4) | 1.6 μg/m3 (7) | 36.0 | |
| April 17, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 3.3 μg/m3 (4) | 1.4 μg/m3 (6) | 35.0 | |
| April 17, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 3.7 μg/m3 (4) | 1.2 μg/m3 (5) | 35.0 | |
| April 17, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 2.7 μg/m3 (3) | 1.7 μg/m3 (8) | 33.0 | |
| April 17, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 4.2 μg/m3 (4) | 1.7 μg/m3 (8) | 32.0 | |
| April 17, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 3.4 μg/m3 (4) | 1.4 μg/m3 (6) | 32.0 | |
| April 17, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 3.1 μg/m3 (3) | 1.8 μg/m3 (8) | 31.0 | |
| April 17, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 4.4 μg/m3 (5) | 2.7 μg/m3 (12) | 28.0 | |
| April 17, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 3.8 μg/m3 (4) | 2.6 μg/m3 (11) | 28.0 | |
| April 17, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 2.7 μg/m3 (3) | 2.0 μg/m3 (9) | 28.0 | |
| April 17, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 3.2 μg/m3 (3) | 2.0 μg/m3 (9) | 29.0 | |
| April 17, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 3.7 μg/m3 (4) | 2.4 μg/m3 (10) | 29.0 | |
| April 17, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 3.7 μg/m3 (4) | 1.9 μg/m3 (8) | 29.0 | |
| April 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 3.3 μg/m3 (4) | 1.5 μg/m3 (7) | 29.0 | |
| April 17, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.8 μg/m3 (2) | 1.1 μg/m3 (5) | 5.0 | |
| April 17, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 2.0 μg/m3 (2) | 1.2 μg/m3 (5) | 31.0 | |
| April 17, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 2.0 μg/m3 (2) | 1.2 μg/m3 (5) | 32.0 | |
| April 17, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 2.6 μg/m3 (3) | 1.3 μg/m3 (6) | 33.0 | |
| April 17, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 3.4 μg/m3 (4) | 1.7 μg/m3 (8) | 35.0 | |
| April 17, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 4.6 μg/m3 (5) | 2.4 μg/m3 (10) | 34.0 | |
| April 16, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 3.5 μg/m3 (4) | 2.0 μg/m3 (9) | 34.0 | |
| April 16, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 3.0 μg/m3 (3) | 1.3 μg/m3 (6) | 35.0 | |
| April 16, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 2.2 μg/m3 (3) | 1.0 μg/m3 (5) | 35.0 | |
| April 16, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 2.2 μg/m3 (3) | 0.6 μg/m3 (3) | 37.0 | |
| April 16, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 1.8 μg/m3 (2) | 0.5 μg/m3 (3) | 37.0 | |
| April 16, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 2.0 μg/m3 (2) | 1.0 μg/m3 (5) | 34.0 | |
| April 16, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 10.2 μg/m3 (10) | 5.9 μg/m3 (25) | 25.0 | |
| April 16, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 10.1 μg/m3 (10) | 6.4 μg/m3 (27) | 27.0 | |
| April 16, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 10.1 μg/m3 (10) | 7.0 μg/m3 (30) | 30.0 | |
| April 16, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 9.8 μg/m3 (10) | 6.2 μg/m3 (26) | 26.0 | |
| April 16, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 9.6 μg/m3 (9) | 5.5 μg/m3 (23) | 23.0 | |
| April 16, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 5.0 μg/m3 (5) | 3.9 μg/m3 (17) | 25.0 | |
| April 16, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 6.6 μg/m3 (7) | 4.6 μg/m3 (20) | 22.0 | |
| April 16, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 5.6 μg/m3 (6) | 4.0 μg/m3 (17) | 22.0 | |
| April 16, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 2.6 μg/m3 (3) | 1.9 μg/m3 (8) | 27.0 | |
| April 16, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 1.2 μg/m3 (2) | 0.6 μg/m3 (3) | 33.0 | |
| April 16, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 1.2 μg/m3 (2) | 0.6 μg/m3 (3) | 32.0 | |
| April 16, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 1.6 μg/m3 (2) | 0.9 μg/m3 (4) | 33.0 | |
| April 16, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.7 μg/m3 (4) | 1.7 μg/m3 (8) | 8.0 | |
| April 16, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 3.4 μg/m3 (4) | 2.0 μg/m3 (9) | 33.0 | |
| April 16, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 4.2 μg/m3 (4) | 2.4 μg/m3 (10) | 34.0 | |
| April 16, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 5.3 μg/m3 (5) | 2.7 μg/m3 (12) | 35.0 | |
| April 16, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 3.3 μg/m3 (4) | 1.8 μg/m3 (8) | 36.0 | |
| April 16, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 4.9 μg/m3 (5) | 3.1 μg/m3 (13) | 35.0 | |
| April 15, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 3.1 μg/m3 (3) | 1.7 μg/m3 (8) | 28.0 | |
| April 15, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 1.9 μg/m3 (2) | 1.0 μg/m3 (5) | 36.0 | |
| April 15, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 2.7 μg/m3 (3) | 1.3 μg/m3 (6) | 35.0 | |
| April 15, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 4.1 μg/m3 (4) | 1.4 μg/m3 (6) | 37.0 | |
| April 15, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 2.5 μg/m3 (3) | 1.4 μg/m3 (6) | 39.0 | |
| April 15, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 2.1 μg/m3 (2) | 1.3 μg/m3 (6) | 38.0 | |
| April 15, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 5.4 μg/m3 (5) | 3.2 μg/m3 (14) | 36.0 | |
| April 15, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 10.8 μg/m3 (10) | 6.3 μg/m3 (27) | 34.0 | |
| April 15, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 8.8 μg/m3 (9) | 4.8 μg/m3 (20) | 30.0 | |
| April 15, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 5.5 μg/m3 (6) | 3.1 μg/m3 (13) | 28.0 | |
| April 15, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 4.9 μg/m3 (5) | 2.0 μg/m3 (9) | 27.0 | |
| April 15, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 7.1 μg/m3 (7) | 2.9 μg/m3 (13) | 25.0 | |
| April 15, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 8.8 μg/m3 (9) | 4.7 μg/m3 (20) | 24.0 | |
| April 15, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 15.0 μg/m3 (14) | 7.2 μg/m3 (31) | 31.0 | |
| April 15, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 15.4 μg/m3 (15) | 9.7 μg/m3 (41) | 41.0 | |
| April 15, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 17.9 μg/m3 (17) | 11.3 μg/m3 (48) | 48.0 | |
| April 15, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 19.8 μg/m3 (19) | 12.1 μg/m3 (51) | 51.0 | |
| April 15, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 21.4 μg/m3 (20) | 12.7 μg/m3 (53) | 53.0 | |
| April 15, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.2 μg/m3 (18) | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 19.6 μg/m3 (19) | 10.4 μg/m3 (44) | 44.0 | |
| April 15, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 18.0 μg/m3 (17) | 9.3 μg/m3 (39) | 39.0 | |
| April 15, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 18.3 μg/m3 (17) | 8.3 μg/m3 (35) | 35.0 | |
| April 15, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 15.5 μg/m3 (15) | 7.5 μg/m3 (32) | 32.0 | |
| April 15, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 13.3 μg/m3 (13) | 6.4 μg/m3 (27) | 36.0 | |
| April 14, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 14.6 μg/m3 (14) | 6.4 μg/m3 (27) | 38.0 | |
| April 14, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 14.2 μg/m3 (14) | 5.6 μg/m3 (24) | 38.0 | |
| April 14, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 13.3 μg/m3 (13) | 5.0 μg/m3 (21) | 39.0 | |
| April 14, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (50) | N/A | 12.8 μg/m3 (12) | 4.5 μg/m3 (19) | 50.0 |