Langdale CC, CA: 49.4417, -123.4917
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 23, 2019, 2 a.m. | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2019, 1 a.m. | N/A | 0.1 ppb (0) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 23, 2019, midnight | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2019, 11 p.m. | N/A | 0.4 ppb (0) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2019, 10 p.m. | N/A | 2.2 ppb (2) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2019, 9 p.m. | N/A | 1.5 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2019, 8 p.m. | N/A | 3.2 ppb (3) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 7 p.m. | N/A | 2.8 ppb (3) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2019, 6 p.m. | N/A | 3.9 ppb (4) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 22, 2019, 5 p.m. | N/A | 31.1 ppb (29) | N/A | 19.0 ppb (18) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 29.0 | |
| March 22, 2019, 4 p.m. | N/A | 8.8 ppb (8) | N/A | 19.0 ppb (18) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 18.0 | |
| March 22, 2019, 3 p.m. | N/A | 1.2 ppb (1) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 8.0 | |
| March 22, 2019, 2 p.m. | N/A | 0.4 ppb (0) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2019, 1 p.m. | N/A | 0.1 ppb (0) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 22, 2019, noon | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 4.0 | |
| March 22, 2019, 11 a.m. | N/A | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 22, 2019, 10 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2019, 9 a.m. | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2019, 8 a.m. | N/A | 0.0 ppb (0) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 6.0 | |
| March 22, 2019, 7 a.m. | N/A | -0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 5.0 | |
| March 22, 2019, 6 a.m. | N/A | -0.1 ppb (0) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 6.0 | |
| March 22, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | N/A | |
| March 22, 2019, 4 a.m. | N/A | 0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2019, 3 a.m. | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 22, 2019, 2 a.m. | N/A | -0.1 ppb (0) | 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 22, 2019, 1 a.m. | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, midnight | N/A | 0.4 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2019, 11 p.m. | N/A | 0.5 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2019, 10 p.m. | N/A | 1.3 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2019, 9 p.m. | N/A | 1.6 ppb (1) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2019, 8 p.m. | N/A | 2.7 ppb (3) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 21, 2019, 7 p.m. | N/A | 3.6 ppb (3) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2019, 6 p.m. | N/A | 1.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 6.0 | |
| March 21, 2019, 5 p.m. | N/A | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 4.0 | |
| March 21, 2019, 4 p.m. | N/A | 3.4 ppb (3) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 7.0 | |
| March 21, 2019, 3 p.m. | N/A | 15.1 ppb (14) | N/A | 14.0 ppb (13) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 14.0 | |
| March 21, 2019, 2 p.m. | N/A | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 21, 2019, 1 p.m. | N/A | 0.0 ppb (0) | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 6.0 | |
| March 21, 2019, noon | N/A | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 21, 2019, 11 a.m. | N/A | 0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 4.0 | |
| March 21, 2019, 10 a.m. | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 5.0 | |
| March 21, 2019, 9 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 6.0 | |
| March 21, 2019, 8 a.m. | N/A | -0.1 ppb (0) | N/A | 6.0 ppb (6) | N/A | 5.0 ppb (7) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 7.0 | |
| March 21, 2019, 7 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 4.0 | |
| March 21, 2019, 6 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 21, 2019, 5 a.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 21, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | N/A | |
| March 21, 2019, 3 a.m. | N/A | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 21, 2019, 2 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 21, 2019, 1 a.m. | N/A | 0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 5.0 | |
| March 21, 2019, midnight | N/A | 0.9 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 6.0 | |
| March 20, 2019, 11 p.m. | N/A | 0.8 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 5.0 | |
| March 20, 2019, 10 p.m. | N/A | 6.0 ppb (6) | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 11.0 | |
| March 20, 2019, 9 p.m. | N/A | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 8 p.m. | N/A | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 20, 2019, 7 p.m. | N/A | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 20, 2019, 6 p.m. | N/A | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 20, 2019, 5 p.m. | N/A | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 4 p.m. | N/A | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 3 p.m. | N/A | 0.4 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 20, 2019, 2 p.m. | N/A | 0.5 ppb (0) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 6.0 | |
| March 20, 2019, 1 p.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 20, 2019, noon | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 20, 2019, 11 a.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 20, 2019, 10 a.m. | N/A | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 9 a.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 20, 2019, 8 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 20, 2019, 7 a.m. | N/A | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 5.0 | |
| March 20, 2019, 6 a.m. | N/A | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 20, 2019, 5 a.m. | N/A | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 20, 2019, 4 a.m. | N/A | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 20, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | N/A | |
| March 20, 2019, 2 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 4.0 | |
| March 20, 2019, 1 a.m. | N/A | 0.7 ppb (1) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 8.0 | |
| March 20, 2019, midnight | N/A | 4.3 ppb (4) | N/A | 16.0 ppb (15) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 15.0 | |
| March 19, 2019, 11 p.m. | N/A | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 19, 2019, 10 p.m. | N/A | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 19, 2019, 9 p.m. | N/A | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 19, 2019, 8 p.m. | N/A | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 19, 2019, 7 p.m. | N/A | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 6 p.m. | N/A | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 19, 2019, 5 p.m. | N/A | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 19, 2019, 4 p.m. | N/A | 1.5 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 19, 2019, 3 p.m. | N/A | 2.5 ppb (2) | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 19, 2019, 2 p.m. | N/A | 0.9 ppb (1) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 19, 2019, 1 p.m. | N/A | 0.3 ppb (0) | N/A | 9.0 ppb (8) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 19, 2019, noon | N/A | -0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 19, 2019, 11 a.m. | N/A | 0.0 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 19, 2019, 10 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 19, 2019, 9 a.m. | N/A | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 19, 2019, 8 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 19, 2019, 7 a.m. | N/A | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 19, 2019, 6 a.m. | N/A | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 19, 2019, 5 a.m. | N/A | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 19, 2019, 4 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 19, 2019, 3 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 19, 2019, 2 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 19, 2019, 1 a.m. | N/A | 1.1 ppb (1) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 19, 2019, midnight | N/A | 4.3 ppb (4) | N/A | 16.0 ppb (15) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 15.0 | |
| March 18, 2019, 11 p.m. | N/A | 0.6 ppb (1) | 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 18, 2019, 10 p.m. | N/A | 2.1 ppb (2) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 6.0 | |
| March 18, 2019, 9 p.m. | N/A | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 18, 2019, 8 p.m. | N/A | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 7 p.m. | N/A | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 6 p.m. | N/A | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 18, 2019, 5 p.m. | N/A | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 18, 2019, 4 p.m. | N/A | 1.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 18, 2019, 3 p.m. | N/A | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 18, 2019, 2 p.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 18, 2019, 1 p.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 18, 2019, noon | N/A | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| March 18, 2019, 11 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 18, 2019, 10 a.m. | N/A | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| March 18, 2019, 9 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| March 18, 2019, 8 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 18, 2019, 7 a.m. | N/A | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 3.0 | |
| March 18, 2019, 6 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 2.0 | |
| March 18, 2019, 5 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| March 18, 2019, 4 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 18, 2019, 3 a.m. | N/A | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| March 18, 2019, 2 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 18, 2019, midnight | N/A | 22.3 ppb (21) | N/A | 23.0 ppb (21) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 21.0 | |
| March 17, 2019, 11 p.m. | N/A | 1.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 17, 2019, 10 p.m. | N/A | 14.5 ppb (13) | N/A | 17.0 ppb (16) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 17, 2019, 9 p.m. | N/A | 2.6 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 17, 2019, 8 p.m. | N/A | 1.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 17, 2019, 7 p.m. | N/A | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 17, 2019, 6 p.m. | N/A | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 17, 2019, 5 p.m. | N/A | 6.5 ppb (6) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 17, 2019, 4 p.m. | N/A | 3.7 ppb (3) | N/A | 9.0 ppb (8) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 17, 2019, 3 p.m. | N/A | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 17, 2019, 2 p.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 17, 2019, 1 p.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 17, 2019, noon | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 17, 2019, 11 a.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 17, 2019, 10 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 17, 2019, 9 a.m. | N/A | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 17, 2019, 8 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 17, 2019, 7 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| March 17, 2019, 6 a.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 3.0 | |
| March 17, 2019, 5 a.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 17, 2019, 4 a.m. | N/A | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 17, 2019, 3 a.m. | N/A | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 17, 2019, 2 a.m. | N/A | 3.7 ppb (3) | N/A | 23.0 ppb (21) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| March 17, 2019, 1 a.m. | N/A | 16.4 ppb (15) | N/A | 31.0 ppb (29) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 16, 2019, 11 p.m. | N/A | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 16, 2019, 10 p.m. | N/A | 9.4 ppb (9) | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 16, 2019, 9 p.m. | N/A | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 16, 2019, 8 p.m. | N/A | 5.2 ppb (5) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| March 16, 2019, 7 p.m. | N/A | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 16, 2019, 6 p.m. | N/A | 2.7 ppb (3) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 16, 2019, 5 p.m. | N/A | 7.9 ppb (7) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 16, 2019, 4 p.m. | N/A | 1.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 16, 2019, 3 p.m. | N/A | 0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 16, 2019, 2 p.m. | N/A | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 16, 2019, 1 p.m. | N/A | 0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 16, 2019, noon | N/A | 0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 16, 2019, 11 a.m. | N/A | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 16, 2019, 10 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 16, 2019, 9 a.m. | N/A | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| March 16, 2019, 8 a.m. | N/A | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 | |
| March 16, 2019, 7 a.m. | N/A | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.0 | |
| March 16, 2019, 6 a.m. | N/A | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| March 16, 2019, 5 a.m. | N/A | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| March 16, 2019, 4 a.m. | N/A | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| March 16, 2019, 3 a.m. | N/A | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | -4.0 μg/m3 (0) | 2.0 |