Annapolis Co CC, CA: 45.0061, -65.0
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 23, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 23, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 23, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 23, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 3.0 μg/m3 (12) | 33.0 | |
| March 23, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 3.0 μg/m3 (12) | 34.0 | |
| March 23, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 3.0 μg/m3 (12) | 33.0 | |
| March 23, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| March 23, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 3.0 μg/m3 (12) | 33.0 | |
| March 23, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 2.0 μg/m3 (8) | 35.0 | |
| March 23, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 1.0 μg/m3 (4) | 36.0 | |
| March 23, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 2.0 μg/m3 (8) | 37.0 | |
| March 23, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 2.0 μg/m3 (8) | 36.0 | |
| March 22, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 1.0 μg/m3 (4) | 36.0 | |
| March 22, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 2.0 μg/m3 (8) | 36.0 | |
| March 22, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 3.0 μg/m3 (12) | 37.0 | |
| March 22, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 1.0 μg/m3 (4) | 38.0 | |
| March 22, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 1.0 μg/m3 (4) | 38.0 | |
| March 22, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 1.0 μg/m3 (4) | 38.0 | |
| March 22, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 2.0 μg/m3 (8) | 38.0 | |
| March 22, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 2.0 μg/m3 (8) | 38.0 | |
| March 22, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | N/A | 34.0 | |
| March 22, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 4.0 μg/m3 (17) | 34.0 | |
| March 22, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 4.0 μg/m3 (17) | 31.0 | |
| March 22, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| March 22, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 3.0 μg/m3 (12) | 31.0 | |
| March 22, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (29) | 32.0 | |
| March 22, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| March 22, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 5.0 μg/m3 (21) | 32.0 | |
| March 22, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 22, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 6.0 μg/m3 (25) | 36.0 | |
| March 22, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| March 22, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 5.0 μg/m3 (21) | 38.0 | |
| March 22, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 5.0 μg/m3 (21) | 36.0 | |
| March 22, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 7.0 μg/m3 (29) | 36.0 | |
| March 22, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 22, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 7.0 μg/m3 (29) | 37.0 | |
| March 21, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 7.0 μg/m3 (29) | 38.0 | |
| March 21, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 21, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 10.0 μg/m3 (42) | 43.0 | |
| March 21, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 10.0 μg/m3 (42) | 43.0 | |
| March 21, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 7.0 μg/m3 (29) | 42.0 | |
| March 21, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 8.0 μg/m3 (33) | 42.0 | |
| March 21, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 4.0 μg/m3 (17) | 40.0 | |
| March 21, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 4.0 μg/m3 (17) | 39.0 | |
| March 21, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 8.0 μg/m3 (33) | 39.0 | |
| March 21, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| March 21, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 21, 2019, 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 21, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 21, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 21, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 7 a.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 | |
| March 21, 2019, 6 a.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 | |
| March 21, 2019, 5 a.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 | |
| March 21, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 21, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 21, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 21, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 5.0 μg/m3 (21) | 36.0 | |
| March 20, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 6.0 μg/m3 (25) | 36.0 | |
| March 20, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 20, 2019, 8 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 | |
| March 20, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 20, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 6.0 μg/m3 (25) | 38.0 | |
| March 20, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 6.0 μg/m3 (25) | 36.0 | |
| March 20, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| March 20, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 6.0 μg/m3 (25) | 32.0 | |
| March 20, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 5.0 μg/m3 (21) | 33.0 | |
| March 20, 2019, 11 a.m. | 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 20, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 20, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 20, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 20, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 7.0 μg/m3 (29) | 36.0 | |
| March 20, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 5.0 μg/m3 (21) | 37.0 | |
| March 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 5.0 μg/m3 (21) | 36.0 | |
| March 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 8.0 μg/m3 (33) | 36.0 | |
| March 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 19, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 19, 2019, 9 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 | |
| March 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 19, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 5.0 μg/m3 (21) | 37.0 | |
| March 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 5.0 μg/m3 (21) | 37.0 | |
| March 19, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 6.0 μg/m3 (25) | 37.0 | |
| March 19, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 5.0 μg/m3 (21) | 36.0 | |
| March 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| March 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 5.0 μg/m3 (21) | 33.0 | |
| March 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 8.0 μg/m3 (33) | 34.0 | |
| March 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 7.0 μg/m3 (29) | 34.0 | |
| March 19, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 9 a.m. | 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 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| March 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| March 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| March 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| March 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 8.0 μg/m3 (33) | 35.0 | |
| March 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 8.0 μg/m3 (33) | 35.0 | |
| March 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 6.0 μg/m3 (25) | 36.0 | |
| March 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 5.0 μg/m3 (21) | 36.0 | |
| March 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 2.0 μg/m3 (8) | 36.0 | |
| March 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 2.0 μg/m3 (8) | 36.0 | |
| March 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 3.0 μg/m3 (12) | 36.0 | |
| March 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| March 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | N/A | 35.0 | |
| March 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 8.0 μg/m3 (33) | 34.0 | |
| March 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 18, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 7.0 μg/m3 (29) | 33.0 | |
| March 18, 2019, 5 a.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 | |
| March 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 18, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 18, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 17, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 17, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 7.0 μg/m3 (29) | 35.0 | |
| March 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| March 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 6.0 μg/m3 (25) | 35.0 | |
| March 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 5.0 μg/m3 (21) | 34.0 | |
| March 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 7.0 μg/m3 (29) | 34.0 | |
| March 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 8.0 μg/m3 (33) | 34.0 | |
| March 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 17, 2019, 1 p.m. | 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 17, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| March 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 8.0 μg/m3 (33) | 35.0 | |
| March 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 4.0 μg/m3 (17) | 35.0 | |
| March 17, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| March 17, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 8.0 μg/m3 (33) | 34.0 | |
| March 17, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 17, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 17, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (29) | 32.0 | |
| March 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 16, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 7.0 μg/m3 (29) | 32.0 | |
| March 16, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 16, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 4.0 μg/m3 (17) | 28.0 | |
| March 16, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| March 16, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 5.0 μg/m3 (21) | 28.0 | |
| March 16, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| March 16, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 3.0 μg/m3 (12) | 34.0 | |
| March 16, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | -1.0 μg/m3 (0) | 35.0 | |
| March 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 2.0 μg/m3 (8) | 34.0 |