Anchorage (Airport Heights) AK, US: 61.205861, -149.8246
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 28, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 4.0 μg/m3 (17) | 17.0 | |
| March 28, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 1.0 μg/m3 (1) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 0.0 μg/m3 (0) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 3.0 μg/m3 (12) | 12.0 | |
| March 28, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 4.0 μg/m3 (17) | 17.0 | |
| March 28, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 1.0 μg/m3 (1) | 4.0 μg/m3 (17) | 17.0 | |
| March 28, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 3.0 μg/m3 (12) | 12.0 | |
| March 27, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 2.0 μg/m3 (8) | 8.0 | |
| March 27, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 3.0 μg/m3 (12) | 12.0 | |
| March 27, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 4.0 μg/m3 (4) | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 2.0 μg/m3 (2) | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 4.0 μg/m3 (4) | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 5.0 μg/m3 (5) | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.7 ppb (30) | 3.0 μg/m3 (3) | 6.0 μg/m3 (25) | 30.0 | |
| March 27, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 1.0 μg/m3 (1) | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 5.0 μg/m3 (5) | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 7.0 μg/m3 (6) | 11.0 μg/m3 (46) | 46.0 | |
| March 27, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 5.0 μg/m3 (5) | 3.0 μg/m3 (12) | 12.0 | |
| March 27, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 6.0 μg/m3 (5) | 2.0 μg/m3 (8) | 8.0 | |
| March 27, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 5.0 μg/m3 (5) | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 6.0 μg/m3 (5) | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 6.0 μg/m3 (5) | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 2.0 μg/m3 (2) | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 2.0 μg/m3 (2) | 2.0 μg/m3 (8) | 8.0 | |
| March 27, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 5.0 μg/m3 (5) | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 3.0 μg/m3 (3) | 2.0 μg/m3 (8) | 8.0 | |
| March 26, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 1.0 μg/m3 (1) | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 4.0 μg/m3 (4) | 2.0 μg/m3 (8) | 8.0 | |
| March 26, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | N/A | N/A | 1.0 | |
| March 26, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 7.0 μg/m3 (6) | 6.0 μg/m3 (25) | 25.0 | |
| March 26, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 10.0 μg/m3 (9) | 8.0 μg/m3 (33) | 33.0 | |
| March 26, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 ppb (8) | 9.0 μg/m3 (8) | 6.0 μg/m3 (25) | 25.0 | |
| March 26, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.9 ppb (10) | 8.0 μg/m3 (7) | 10.0 μg/m3 (42) | 42.0 | |
| March 26, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 9.0 μg/m3 (8) | 11.0 μg/m3 (46) | 46.0 | |
| March 26, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 12.0 μg/m3 (11) | 8.0 μg/m3 (33) | 33.0 | |
| March 26, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 8.0 μg/m3 (7) | 9.0 μg/m3 (38) | 38.0 | |
| March 26, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 11.0 μg/m3 (10) | 6.0 μg/m3 (25) | 25.0 | |
| March 26, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 12.0 μg/m3 (11) | 7.0 μg/m3 (29) | 29.0 | |
| March 26, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 14.0 μg/m3 (13) | 10.0 μg/m3 (42) | 42.0 | |
| March 26, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 12.0 μg/m3 (11) | 8.0 μg/m3 (33) | 33.0 | |
| March 26, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 13.0 μg/m3 (12) | 12.0 μg/m3 (50) | 50.0 | |
| March 26, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 14.0 μg/m3 (13) | 7.0 μg/m3 (29) | 29.0 | |
| March 26, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 17.0 μg/m3 (15) | 8.0 μg/m3 (33) | 33.0 | |
| March 26, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 22.0 μg/m3 (20) | 10.0 μg/m3 (42) | 42.0 | |
| March 26, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 28.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| March 26, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 25.0 μg/m3 (23) | 12.0 μg/m3 (50) | 50.0 | |
| March 26, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 24.0 μg/m3 (22) | 9.0 μg/m3 (38) | 38.0 | |
| March 25, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 21.0 μg/m3 (19) | 7.0 μg/m3 (29) | 29.0 | |
| March 25, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 22.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| March 25, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 18.0 μg/m3 (16) | 6.0 μg/m3 (25) | 25.0 | |
| March 25, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 27.0 μg/m3 (25) | 9.0 μg/m3 (38) | 38.0 | |
| March 25, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 14.0 μg/m3 (13) | 7.0 μg/m3 (29) | 29.0 | |
| March 25, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 14.0 μg/m3 (13) | 8.0 μg/m3 (33) | 33.0 | |
| March 25, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 16.0 μg/m3 (15) | 12.0 μg/m3 (50) | 50.0 | |
| March 25, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.1 ppb (12) | 18.0 μg/m3 (16) | 12.0 μg/m3 (50) | 50.0 | |
| March 25, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 18.0 μg/m3 (16) | 12.0 μg/m3 (50) | 50.0 | |
| March 25, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 10.0 μg/m3 (9) | 10.0 μg/m3 (42) | 42.0 | |
| March 25, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 ppb (8) | 12.0 μg/m3 (11) | 11.0 μg/m3 (46) | 46.0 | |
| March 25, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 15.0 μg/m3 (14) | 12.0 μg/m3 (50) | 50.0 | |
| March 25, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 ppb (8) | 17.0 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| March 25, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 22.0 μg/m3 (20) | 11.0 μg/m3 (46) | 46.0 | |
| March 25, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 24.0 μg/m3 (22) | 14.0 μg/m3 (54) | 54.0 | |
| March 25, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 23.0 μg/m3 (21) | 18.0 μg/m3 (63) | 63.0 | |
| March 25, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.9 ppb (10) | 26.0 μg/m3 (24) | 17.0 μg/m3 (61) | 61.0 | |
| March 25, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 ppb (8) | 25.0 μg/m3 (23) | 13.0 μg/m3 (52) | 52.0 | |
| March 25, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 26.0 μg/m3 (24) | 13.0 μg/m3 (52) | 52.0 | |
| March 25, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 24.0 μg/m3 (22) | 16.0 μg/m3 (59) | 59.0 | |
| March 25, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 16.0 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| March 25, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 13.0 μg/m3 (12) | 12.0 μg/m3 (50) | 50.0 | |
| March 25, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 20.0 μg/m3 (18) | 10.0 μg/m3 (42) | 42.0 | |
| March 25, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 20.0 μg/m3 (18) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 19.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 19.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 18.0 μg/m3 (16) | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 32.0 μg/m3 (29) | 9.0 μg/m3 (38) | 38.0 | |
| March 24, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 49.0 μg/m3 (45) | 18.0 μg/m3 (63) | 63.0 | |
| March 24, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 42.0 μg/m3 (38) | 18.0 μg/m3 (63) | 63.0 | |
| March 24, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.1 ppb (12) | 37.0 μg/m3 (34) | 17.0 μg/m3 (61) | 61.0 | |
| March 24, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.2 ppb (13) | 19.0 μg/m3 (17) | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.3 ppb (14) | 17.0 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| March 24, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 ppb (8) | 16.0 μg/m3 (15) | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 8.0 μg/m3 (7) | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 15.0 μg/m3 (14) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 10.0 μg/m3 (9) | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 9.0 μg/m3 (8) | 10.0 μg/m3 (42) | 42.0 | |
| March 24, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 11.0 μg/m3 (10) | 13.0 μg/m3 (52) | 52.0 | |
| March 24, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 14.0 μg/m3 (13) | 13.0 μg/m3 (52) | 52.0 | |
| March 24, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 21.0 μg/m3 (19) | 14.0 μg/m3 (54) | 54.0 | |
| March 24, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 20.0 μg/m3 (18) | 11.0 μg/m3 (46) | 46.0 | |
| March 24, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 20.0 μg/m3 (18) | 10.0 μg/m3 (42) | 42.0 | |
| March 24, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 20.0 μg/m3 (18) | 12.0 μg/m3 (50) | 50.0 | |
| March 24, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 15.0 μg/m3 (14) | 4.0 μg/m3 (17) | 17.0 | |
| March 24, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 23.0 μg/m3 (21) | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 13.0 μg/m3 (12) | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 13.0 μg/m3 (12) | 2.0 μg/m3 (8) | 12.0 | |
| March 23, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 16.0 μg/m3 (15) | 2.0 μg/m3 (8) | 15.0 | |
| March 23, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 32.0 μg/m3 (29) | 5.0 μg/m3 (21) | 29.0 | |
| March 23, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 31.0 μg/m3 (28) | 6.0 μg/m3 (25) | 28.0 | |
| March 23, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 43.0 μg/m3 (39) | 10.0 μg/m3 (42) | 42.0 | |
| March 23, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 78.0 μg/m3 (62) | 13.0 μg/m3 (52) | 62.0 | |
| March 23, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.4 ppb (16) | 76.0 μg/m3 (60) | 26.0 μg/m3 (80) | 80.0 | |
| March 23, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.3 ppb (14) | 74.0 μg/m3 (60) | 34.0 μg/m3 (97) | 97.0 | |
| March 23, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (11) | 18.0 μg/m3 (16) | 10.0 μg/m3 (42) | 42.0 | |
| March 23, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.9 ppb (10) | 34.0 μg/m3 (31) | 21.0 μg/m3 (69) | 69.0 | |
| March 23, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 13.0 μg/m3 (12) | 10.0 μg/m3 (42) | 42.0 | |
| March 23, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.5 ppb (28) | 13.0 μg/m3 (12) | 8.0 μg/m3 (33) | 33.0 | |
| March 23, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 13.0 μg/m3 (12) | 10.0 μg/m3 (42) | 42.0 | |
| March 23, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 17.0 μg/m3 (15) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 21.0 μg/m3 (19) | 22.0 μg/m3 (71) | 71.0 | |
| March 23, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 15.0 μg/m3 (14) | 16.0 μg/m3 (59) | 59.0 | |
| March 23, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.8 ppb (9) | 17.0 μg/m3 (15) | 16.0 μg/m3 (59) | 59.0 | |
| March 23, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.7 ppb (8) | 12.0 μg/m3 (11) | 16.0 μg/m3 (59) | 59.0 | |
| March 23, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.6 ppb (7) | 11.0 μg/m3 (10) | 9.0 μg/m3 (38) | 38.0 | |
| March 23, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 8.0 μg/m3 (7) | 2.0 μg/m3 (8) | 8.0 | |
| March 23, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 5.0 μg/m3 (5) | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 3.0 μg/m3 (3) | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 2.0 μg/m3 (2) | 1.0 μg/m3 (4) | 4.0 | |
| March 23, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 3.0 μg/m3 (3) | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 3.0 μg/m3 (3) | 1.0 μg/m3 (4) | 4.0 | |
| March 22, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 0.0 μg/m3 (0) | -1.0 μg/m3 (0) | 1.0 | |
| March 22, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | -1.0 μg/m3 (0) | -3.0 μg/m3 (0) | 1.0 | |
| March 22, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 1.0 μg/m3 (1) | -1.0 μg/m3 (0) | 1.0 | |
| March 22, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 4.0 μg/m3 (4) | 1.0 μg/m3 (4) | 4.0 | |
| March 22, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 5.0 μg/m3 (5) | -2.0 μg/m3 (0) | 5.0 | |
| March 22, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 0.0 μg/m3 (0) | 4.0 | |
| March 22, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 2.0 μg/m3 (2) | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 5.0 μg/m3 (21) | 21.0 | |
| March 22, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 2.0 μg/m3 (2) | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 4.0 μg/m3 (4) | -3.0 μg/m3 (0) | 4.0 | |
| March 22, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (1) | 4.0 μg/m3 (4) | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 3.0 μg/m3 (3) | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 6.0 μg/m3 (5) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 10.0 μg/m3 (9) | 9.0 μg/m3 (38) | 38.0 | |
| March 22, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 9.0 μg/m3 (8) | 11.0 μg/m3 (46) | 46.0 | |
| March 22, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 8.0 μg/m3 (7) | 10.0 μg/m3 (42) | 42.0 | |
| March 22, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 8.0 μg/m3 (7) | 10.0 μg/m3 (42) | 42.0 | |
| March 22, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 9.0 μg/m3 (8) | 3.0 μg/m3 (12) | 12.0 | |
| March 22, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 6.0 μg/m3 (5) | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 0.0 μg/m3 (0) | 4.0 | |
| March 22, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 1.0 μg/m3 (4) | 4.0 | |
| March 22, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 2.0 μg/m3 (8) | 8.0 | |
| March 21, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 4.0 μg/m3 (4) | 1.0 μg/m3 (4) | 4.0 | |
| March 21, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 5.0 μg/m3 (5) | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 5.0 μg/m3 (5) | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 6.0 μg/m3 (5) | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 5.0 μg/m3 (5) | 3.0 μg/m3 (12) | 12.0 | |
| March 21, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 7.0 μg/m3 (6) | 1.0 μg/m3 (4) | 6.0 | |
| March 21, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 13.0 μg/m3 (12) | 2.0 μg/m3 (8) | 12.0 | |
| March 21, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | 9.0 μg/m3 (8) | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 6.0 μg/m3 (5) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 7.0 μg/m3 (6) | 5.0 μg/m3 (21) | 21.0 | |
| March 21, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 ppb (6) | 5.0 μg/m3 (5) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 7.0 μg/m3 (6) | 5.0 μg/m3 (21) | 21.0 | |
| March 21, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (4) | 10.0 μg/m3 (9) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.3 ppb (3) | 6.0 μg/m3 (5) | 6.0 μg/m3 (25) | 25.0 |