Portland (Parkside) ME, US: 43.660248, -70.268967
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 5, 2020, 8 a.m. | 3.2 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 5, 2020, 7 a.m. | 3.7 ppb (3) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 5, 2020, 6 a.m. | 5.2 ppb (5) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| April 5, 2020, 5 a.m. | 4.7 ppb (4) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| April 5, 2020, 4 a.m. | 5.1 ppb (5) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 5, 2020, 3 a.m. | 4.1 ppb (4) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 5, 2020, 2 a.m. | 3.4 ppb (3) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| April 5, 2020, 1 a.m. | 3.9 ppb (4) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 5, 2020, midnight | 3.1 ppb (3) | 0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 4, 2020, 11 p.m. | 2.2 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 4, 2020, 10 p.m. | 1.9 ppb (2) | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 4, 2020, 9 p.m. | 1.9 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 5.0 μg/m3 (21) | 27.0 | |
| April 4, 2020, 8 p.m. | 2.6 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 4.0 μg/m3 (17) | 27.0 | |
| April 4, 2020, 7 p.m. | 2.4 ppb (2) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 4, 2020, 6 p.m. | 2.5 ppb (2) | 1.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 4, 2020, 5 p.m. | 1.8 ppb (2) | 0.9 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| April 4, 2020, 4 p.m. | 1.8 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 4.0 μg/m3 (17) | 30.0 | |
| April 4, 2020, 3 p.m. | 1.8 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 4, 2020, 2 p.m. | 2.2 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 4, 2020, 1 p.m. | 2.5 ppb (2) | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 4, 2020, noon | 2.0 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 4, 2020, 11 a.m. | 3.0 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 5.0 μg/m3 (21) | 25.0 | |
| April 4, 2020, 10 a.m. | 1.7 ppb (2) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 5.0 μg/m3 (21) | 27.0 | |
| April 4, 2020, 9 a.m. | 1.4 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 4.0 μg/m3 (17) | 28.0 | |
| April 4, 2020, 8 a.m. | 1.4 ppb (1) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| April 4, 2020, 7 a.m. | 1.1 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| April 4, 2020, 6 a.m. | 1.0 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 4, 2020, 5 a.m. | 1.0 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 4, 2020, 4 a.m. | 0.8 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 4, 2020, 3 a.m. | 1.0 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 4, 2020, 2 a.m. | 1.0 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 4, 2020, 1 a.m. | 1.6 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 4, 2020, midnight | 1.5 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 6.0 μg/m3 (25) | 30.0 | |
| April 3, 2020, 11 p.m. | 2.2 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 3, 2020, 10 p.m. | 2.8 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 3, 2020, 9 p.m. | 3.1 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 5.0 μg/m3 (21) | 29.0 | |
| April 3, 2020, 8 p.m. | 3.5 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 3, 2020, 7 p.m. | 4.3 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 3, 2020, 6 p.m. | 12.5 ppb (12) | 6.1 ppb (6) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 3, 2020, 5 p.m. | 12.9 ppb (12) | 6.8 ppb (6) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 3.0 μg/m3 (12) | 27.0 | |
| April 3, 2020, 4 p.m. | 10.6 ppb (10) | 5.4 ppb (5) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| April 3, 2020, 3 p.m. | 11.6 ppb (11) | 5.6 ppb (5) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| April 3, 2020, 2 p.m. | 3.8 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 3, 2020, 1 p.m. | 4.0 ppb (4) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 3, 2020, noon | 3.7 ppb (3) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 6.0 μg/m3 (25) | 30.0 | |
| April 3, 2020, 11 a.m. | 3.2 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| April 3, 2020, 10 a.m. | 2.2 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| April 3, 2020, 9 a.m. | 1.5 ppb (1) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| April 3, 2020, 8 a.m. | 1.4 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 3.0 μg/m3 (12) | 32.0 | |
| April 3, 2020, 7 a.m. | 1.1 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| April 3, 2020, 6 a.m. | 0.8 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| April 3, 2020, 5 a.m. | 1.0 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 4.0 μg/m3 (17) | 31.0 | |
| April 3, 2020, 4 a.m. | 0.9 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 7.0 μg/m3 (29) | 31.0 | |
| April 3, 2020, 3 a.m. | 1.3 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 4.0 μg/m3 (17) | 31.0 | |
| April 3, 2020, 2 a.m. | 1.0 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 3.0 μg/m3 (12) | 31.0 | |
| April 3, 2020, 1 a.m. | 1.2 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 3.0 μg/m3 (12) | 29.0 | |
| April 3, 2020, midnight | 1.6 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 4.0 μg/m3 (17) | 27.0 | |
| April 2, 2020, 11 p.m. | 2.2 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 2, 2020, 10 p.m. | 2.8 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 2, 2020, 9 p.m. | 3.8 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 2, 2020, 8 p.m. | 3.8 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 2, 2020, 7 p.m. | 3.9 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 2, 2020, 6 p.m. | 3.0 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 2, 2020, 5 p.m. | 3.1 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 5.0 μg/m3 (21) | 23.0 | |
| April 2, 2020, 4 p.m. | 3.1 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 2, 2020, 3 p.m. | 2.8 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 2, 2020, 2 p.m. | 3.5 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 2, 2020, 1 p.m. | 4.3 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 5.0 μg/m3 (21) | 23.0 | |
| April 2, 2020, noon | 4.8 ppb (4) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | N/A | 4.0 μg/m3 (17) | 22.0 | |
| April 2, 2020, 11 a.m. | 6.2 ppb (6) | 1.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | N/A | 1.0 μg/m3 (4) | 21.0 | |
| April 2, 2020, 10 a.m. | 3.8 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | N/A | 1.0 μg/m3 (4) | 23.0 | |
| April 2, 2020, 9 a.m. | 2.2 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | N/A | N/A | 2.0 μg/m3 (8) | 25.0 | |
| April 2, 2020, 8 a.m. | 2.1 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 2.0 μg/m3 (8) | 26.0 | |
| April 2, 2020, 7 a.m. | 1.6 ppb (1) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 5.0 μg/m3 (21) | 27.0 | |
| April 2, 2020, 6 a.m. | 1.3 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 2, 2020, 5 a.m. | 1.2 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| April 2, 2020, 4 a.m. | 1.4 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 4.0 μg/m3 (17) | 26.0 | |
| April 2, 2020, 3 a.m. | 1.4 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 3.0 μg/m3 (12) | 26.0 | |
| April 2, 2020, 2 a.m. | 1.2 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 3.0 μg/m3 (12) | 28.0 | |
| April 2, 2020, 1 a.m. | 1.1 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 3.0 μg/m3 (12) | 28.0 | |
| April 2, 2020, midnight | 1.5 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| April 1, 2020, 11 p.m. | 2.4 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 1, 2020, 10 p.m. | 2.6 ppb (2) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 5.0 μg/m3 (21) | 29.0 | |
| April 1, 2020, 9 p.m. | 3.6 ppb (3) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 1, 2020, 8 p.m. | 3.8 ppb (4) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 2.0 μg/m3 (8) | 28.0 | |
| April 1, 2020, 7 p.m. | 6.3 ppb (6) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 2.0 μg/m3 (8) | 28.0 | |
| April 1, 2020, 6 p.m. | 4.3 ppb (4) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| April 1, 2020, 5 p.m. | 4.1 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 4.0 μg/m3 (17) | 29.0 | |
| April 1, 2020, 4 p.m. | 4.2 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 4.0 μg/m3 (17) | 29.0 | |
| April 1, 2020, 3 p.m. | 4.8 ppb (4) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 3.0 μg/m3 (12) | 29.0 | |
| April 1, 2020, 2 p.m. | 4.8 ppb (4) | 2.0 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 4.0 μg/m3 (17) | 30.0 | |
| April 1, 2020, 1 p.m. | 4.3 ppb (4) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 3.0 μg/m3 (12) | 30.0 | |
| April 1, 2020, noon | 4.4 ppb (4) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 5.0 μg/m3 (21) | 29.0 | |
| April 1, 2020, 11 a.m. | 7.0 ppb (6) | 2.0 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | N/A | N/A | 4.0 μg/m3 (17) | 27.0 | |
| April 1, 2020, 10 a.m. | 5.4 ppb (5) | 0.8 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 4.0 μg/m3 (17) | 26.0 | |
| April 1, 2020, 9 a.m. | 5.4 ppb (5) | 0.4 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 1, 2020, 8 a.m. | 4.4 ppb (4) | 0.4 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| April 1, 2020, 7 a.m. | 3.5 ppb (3) | 0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 1, 2020, 6 a.m. | 4.7 ppb (4) | 0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 1, 2020, 5 a.m. | 4.1 ppb (4) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 1, 2020, 4 a.m. | 4.7 ppb (4) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 1, 2020, 3 a.m. | 5.1 ppb (5) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 1, 2020, 2 a.m. | 6.9 ppb (6) | 0.0 ppb (0) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 1, 2020, 1 a.m. | 9.1 ppb (8) | 0.0 ppb (0) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 1, 2020, midnight | 5.3 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 31, 2020, 11 p.m. | 2.8 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 31, 2020, 10 p.m. | 5.0 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (29) | 32.0 | |
| March 31, 2020, 9 p.m. | 3.0 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 6.0 μg/m3 (25) | 34.0 | |
| March 31, 2020, 8 p.m. | 6.6 ppb (6) | 3.7 ppb (3) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 31, 2020, 7 p.m. | 3.3 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 6.0 μg/m3 (25) | 34.0 | |
| March 31, 2020, 6 p.m. | 3.2 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 7.0 μg/m3 (29) | 33.0 | |
| March 31, 2020, 5 p.m. | 3.1 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 7.0 μg/m3 (29) | 33.0 | |
| March 31, 2020, 4 p.m. | 3.5 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| March 31, 2020, 3 p.m. | 4.3 ppb (4) | 1.8 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (29) | 32.0 | |
| March 31, 2020, 2 p.m. | 5.7 ppb (5) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| March 31, 2020, 1 p.m. | 3.8 ppb (4) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| March 31, 2020, noon | 4.2 ppb (4) | 1.7 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 7.0 μg/m3 (29) | 31.0 | |
| March 31, 2020, 11 a.m. | 4.4 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| March 31, 2020, 10 a.m. | 3.4 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| March 31, 2020, 9 a.m. | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 6.0 μg/m3 (25) | 30.0 | |
| March 31, 2020, 8 a.m. | 2.2 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 2.0 μg/m3 (8) | 31.0 | |
| March 31, 2020, 7 a.m. | 1.8 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| March 31, 2020, 6 a.m. | 1.1 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 7.0 μg/m3 (29) | 31.0 | |
| March 31, 2020, 5 a.m. | 1.5 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| March 31, 2020, 4 a.m. | 1.6 ppb (1) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| March 31, 2020, 3 a.m. | 1.8 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 6.0 μg/m3 (25) | 30.0 | |
| March 31, 2020, 2 a.m. | 1.9 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| March 31, 2020, 1 a.m. | 2.3 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 6.0 μg/m3 (25) | 29.0 | |
| March 31, 2020, midnight | 2.0 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 30, 2020, 11 p.m. | 2.7 ppb (3) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 4.0 μg/m3 (17) | 28.0 | |
| March 30, 2020, 10 p.m. | 3.8 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| March 30, 2020, 9 p.m. | 5.8 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| March 30, 2020, 8 p.m. | 5.7 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 3.0 μg/m3 (12) | 30.0 | |
| March 30, 2020, 7 p.m. | 6.1 ppb (6) | 1.8 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| March 30, 2020, 6 p.m. | 5.4 ppb (5) | 1.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 5.0 μg/m3 (21) | 29.0 | |
| March 30, 2020, 5 p.m. | 4.8 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 6.0 μg/m3 (25) | 30.0 | |
| March 30, 2020, 4 p.m. | 4.1 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| March 30, 2020, 3 p.m. | 6.3 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| March 30, 2020, 2 p.m. | 5.3 ppb (5) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 30, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| March 30, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 6.0 μg/m3 (25) | 34.0 | |
| March 30, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 5.0 μg/m3 (21) | 31.0 | |
| March 30, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| March 30, 2020, 9 a.m. | 3.5 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 7.0 μg/m3 (29) | 30.0 | |
| March 30, 2020, 8 a.m. | 3.3 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 30, 2020, 7 a.m. | 2.6 ppb (2) | 0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| March 30, 2020, 6 a.m. | 1.4 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 30, 2020, 5 a.m. | 1.3 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| March 30, 2020, 4 a.m. | 1.4 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 30, 2020, 3 a.m. | 2.6 ppb (2) | 0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 30, 2020, 2 a.m. | 1.6 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | N/A | N/A | 7.0 μg/m3 (29) | 36.0 | |
| March 30, 2020, 1 a.m. | 2.0 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 30, 2020, midnight | 2.0 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 11 p.m. | 1.8 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 29, 2020, 10 p.m. | 2.0 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 9 p.m. | 1.9 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 29, 2020, 8 p.m. | 3.3 ppb (3) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 7 p.m. | 3.4 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 6 p.m. | 5.9 ppb (5) | 1.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 29, 2020, 5 p.m. | 3.7 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 29, 2020, 4 p.m. | 3.9 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| March 29, 2020, 3 p.m. | 4.3 ppb (4) | 1.7 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 2 p.m. | 2.9 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 29, 2020, 1 p.m. | 3.3 ppb (3) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| March 29, 2020, noon | 3.4 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| March 29, 2020, 11 a.m. | 3.6 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| March 29, 2020, 10 a.m. | 5.2 ppb (5) | 0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 9 a.m. | 4.3 ppb (4) | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | N/A | 6.0 μg/m3 (25) | 26.0 |