Champaign Co IL, US: 40.0519, -88.3724
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 26, 2019, 6 a.m. | N/A | 0.1 ppb (0) | 5.2 ppb (5) | N/A | 5.2 ppb (5) | 1.0 ppb (1) | 26.0 ppb (20) | 0.0 ppb (0) | N/A | N/A | 20.0 | |
| March 26, 2019, 5 a.m. | N/A | 0.0 ppb (0) | 4.5 ppb (4) | N/A | 4.5 ppb (4) | 0.0 ppb (0) | 26.0 ppb (20) | 0.0 ppb (0) | N/A | N/A | 20.0 | |
| March 26, 2019, 4 a.m. | N/A | 0.0 ppb (0) | 4.3 ppb (4) | N/A | 4.2 ppb (4) | 0.0 ppb (0) | 27.0 ppb (21) | 0.0 ppb (0) | N/A | N/A | 21.0 | |
| March 26, 2019, 3 a.m. | N/A | 0.0 ppb (0) | 4.3 ppb (4) | N/A | 4.2 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 26, 2019, 2 a.m. | N/A | 0.0 ppb (0) | 4.5 ppb (4) | N/A | 4.5 ppb (4) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 26, 2019, 1 a.m. | N/A | 0.0 ppb (0) | 4.2 ppb (4) | N/A | 4.2 ppb (4) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 26, 2019, midnight | N/A | 0.0 ppb (0) | 4.4 ppb (4) | N/A | 4.4 ppb (4) | 0.0 ppb (0) | 35.0 ppb (27) | 0.0 ppb (0) | N/A | N/A | 27.0 | |
| March 25, 2019, 11 p.m. | N/A | 0.1 ppb (0) | 4.2 ppb (4) | N/A | 4.2 ppb (4) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 25, 2019, 10 p.m. | N/A | 0.1 ppb (0) | 3.7 ppb (3) | N/A | 3.5 ppb (3) | 0.0 ppb (0) | 43.0 ppb (33) | 0.0 ppb (0) | N/A | N/A | 33.0 | |
| March 25, 2019, 9 p.m. | N/A | 0.2 ppb (0) | 3.6 ppb (3) | N/A | 3.4 ppb (3) | 0.0 ppb (0) | 43.0 ppb (33) | 0.0 ppb (0) | N/A | N/A | 33.0 | |
| March 25, 2019, 8 p.m. | N/A | 0.2 ppb (0) | 3.6 ppb (3) | N/A | 3.3 ppb (3) | 0.0 ppb (0) | 42.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 25, 2019, 7 p.m. | N/A | 0.2 ppb (0) | 3.5 ppb (3) | N/A | 3.3 ppb (3) | 0.0 ppb (0) | 41.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 25, 2019, 6 p.m. | N/A | 0.1 ppb (0) | 3.1 ppb (3) | N/A | 3.0 ppb (3) | 0.0 ppb (0) | 39.0 ppb (30) | 0.0 ppb (0) | N/A | N/A | 30.0 | |
| March 25, 2019, 5 p.m. | N/A | 0.3 ppb (0) | 3.4 ppb (3) | N/A | 3.0 ppb (3) | 0.0 ppb (0) | 33.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 25, 2019, 4 p.m. | N/A | 0.5 ppb (0) | 4.1 ppb (4) | N/A | 3.6 ppb (3) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 25, 2019, 3 p.m. | N/A | 0.4 ppb (0) | 4.2 ppb (4) | N/A | 3.8 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 25, 2019, 2 p.m. | N/A | 0.2 ppb (0) | 3.9 ppb (4) | N/A | 3.7 ppb (3) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 25, 2019, 1 p.m. | N/A | 0.1 ppb (0) | 4.8 ppb (4) | N/A | 4.7 ppb (4) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 25, 2019, noon | N/A | -0.2 ppb (0) | 3.9 ppb (4) | N/A | 4.1 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 25, 2019, 11 a.m. | N/A | -0.2 ppb (0) | 3.1 ppb (3) | N/A | 3.3 ppb (3) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 25, 2019, 6 a.m. | N/A | 0.3 ppb (0) | 4.1 ppb (4) | N/A | 3.8 ppb (4) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 25, 2019, 5 a.m. | N/A | 0.4 ppb (0) | 3.9 ppb (4) | N/A | 3.5 ppb (3) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 25, 2019, 4 a.m. | N/A | 0.3 ppb (0) | 5.0 ppb (5) | N/A | 4.7 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 25, 2019, 3 a.m. | N/A | 0.2 ppb (0) | 4.1 ppb (4) | N/A | 3.8 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 25, 2019, 2 a.m. | N/A | 0.2 ppb (0) | 4.2 ppb (4) | N/A | 4.0 ppb (4) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 25, 2019, 1 a.m. | N/A | 0.1 ppb (0) | 4.3 ppb (4) | N/A | 4.2 ppb (4) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 25, 2019, midnight | N/A | -0.1 ppb (0) | 3.7 ppb (3) | N/A | 3.8 ppb (4) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 24, 2019, 11 p.m. | N/A | -0.2 ppb (0) | 3.9 ppb (4) | N/A | 4.1 ppb (4) | 0.0 ppb (0) | 37.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 22, 2019, 6 a.m. | N/A | 0.3 ppb (0) | 1.9 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 22, 2019, 5 a.m. | N/A | 0.3 ppb (0) | 2.6 ppb (2) | N/A | 2.2 ppb (2) | 0.0 ppb (0) | 27.0 ppb (21) | 0.0 ppb (0) | N/A | N/A | 21.0 | |
| March 22, 2019, 4 a.m. | N/A | 0.5 ppb (0) | 2.6 ppb (2) | N/A | 2.1 ppb (2) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 22, 2019, 3 a.m. | N/A | 0.6 ppb (1) | 2.4 ppb (2) | N/A | 1.8 ppb (2) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 22, 2019, 2 a.m. | N/A | 0.6 ppb (1) | 2.8 ppb (3) | N/A | 2.2 ppb (2) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 22, 2019, 1 a.m. | N/A | 0.5 ppb (0) | 2.3 ppb (2) | N/A | 1.8 ppb (2) | 0.0 ppb (0) | 36.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 22, 2019, midnight | N/A | 0.4 ppb (0) | 2.0 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 37.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 21, 2019, 11 p.m. | N/A | 0.2 ppb (0) | 2.1 ppb (2) | N/A | 1.9 ppb (2) | 0.0 ppb (0) | 41.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 21, 2019, 10 p.m. | N/A | 0.2 ppb (0) | 2.5 ppb (2) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 41.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 21, 2019, 9 p.m. | N/A | 0.1 ppb (0) | 2.5 ppb (2) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 21, 2019, 8 p.m. | N/A | 0.0 ppb (0) | 2.5 ppb (2) | N/A | 2.5 ppb (2) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 21, 2019, 7 p.m. | N/A | 0.0 ppb (0) | 2.7 ppb (3) | N/A | 2.8 ppb (3) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 21, 2019, 6 p.m. | N/A | -0.1 ppb (0) | 3.1 ppb (3) | N/A | 3.3 ppb (3) | 0.0 ppb (0) | 39.0 ppb (30) | 0.0 ppb (0) | N/A | N/A | 30.0 | |
| March 21, 2019, 5 p.m. | N/A | -0.3 ppb (0) | 3.4 ppb (3) | N/A | 3.7 ppb (3) | 0.0 ppb (0) | 36.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 21, 2019, 4 p.m. | N/A | 0.2 ppb (0) | 3.8 ppb (4) | N/A | 3.6 ppb (3) | 0.0 ppb (0) | 35.0 ppb (27) | 0.0 ppb (0) | N/A | N/A | 27.0 | |
| March 21, 2019, 3 p.m. | N/A | 0.2 ppb (0) | 3.8 ppb (4) | N/A | 3.6 ppb (3) | 0.0 ppb (0) | 36.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 21, 2019, 2 p.m. | N/A | 0.3 ppb (0) | 4.2 ppb (4) | N/A | 3.9 ppb (4) | 0.0 ppb (0) | 34.0 ppb (26) | 0.0 ppb (0) | N/A | N/A | 26.0 | |
| March 21, 2019, 1 p.m. | N/A | 0.3 ppb (0) | 4.6 ppb (4) | N/A | 4.3 ppb (4) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 21, 2019, noon | N/A | 0.3 ppb (0) | 4.3 ppb (4) | N/A | 4.0 ppb (4) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 21, 2019, 11 a.m. | N/A | 0.4 ppb (0) | 4.2 ppb (4) | N/A | 3.8 ppb (4) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 21, 2019, 10 a.m. | N/A | 0.5 ppb (0) | 3.8 ppb (4) | N/A | 3.4 ppb (3) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 21, 2019, 9 a.m. | N/A | 0.4 ppb (0) | 3.1 ppb (3) | N/A | 2.6 ppb (2) | 0.0 ppb (0) | 34.0 ppb (26) | 0.0 ppb (0) | N/A | N/A | 26.0 | |
| March 21, 2019, 6 a.m. | N/A | 0.2 ppb (0) | 2.4 ppb (2) | N/A | 2.2 ppb (2) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 21, 2019, 5 a.m. | N/A | 0.1 ppb (0) | 2.2 ppb (2) | N/A | 2.0 ppb (2) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 21, 2019, 4 a.m. | N/A | 0.2 ppb (0) | 4.4 ppb (4) | N/A | 4.3 ppb (4) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 21, 2019, 3 a.m. | N/A | 0.3 ppb (0) | 4.7 ppb (4) | N/A | 4.4 ppb (4) | 0.0 ppb (0) | 25.0 ppb (19) | 0.0 ppb (0) | N/A | N/A | 19.0 | |
| March 21, 2019, 2 a.m. | N/A | 0.5 ppb (0) | 3.3 ppb (3) | N/A | 2.8 ppb (3) | 0.0 ppb (0) | 27.0 ppb (21) | 0.0 ppb (0) | N/A | N/A | 21.0 | |
| March 21, 2019, 1 a.m. | N/A | 0.4 ppb (0) | 4.3 ppb (4) | N/A | 3.9 ppb (4) | 0.0 ppb (0) | 27.0 ppb (21) | 0.0 ppb (0) | N/A | N/A | 21.0 | |
| March 21, 2019, midnight | N/A | 0.1 ppb (0) | 4.1 ppb (4) | N/A | 3.9 ppb (4) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 20, 2019, 11 p.m. | N/A | -0.1 ppb (0) | 3.8 ppb (4) | N/A | 3.9 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 20, 2019, 10 p.m. | N/A | -0.3 ppb (0) | 3.2 ppb (3) | N/A | 3.5 ppb (3) | 0.0 ppb (0) | 35.0 ppb (27) | 0.0 ppb (0) | N/A | N/A | 27.0 | |
| March 20, 2019, 9 p.m. | N/A | -0.3 ppb (0) | 4.5 ppb (4) | N/A | 4.8 ppb (4) | 1.0 ppb (1) | 36.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 20, 2019, 7 p.m. | N/A | -0.3 ppb (0) | 4.1 ppb (4) | N/A | 4.4 ppb (4) | 0.0 ppb (0) | 38.0 ppb (29) | 0.0 ppb (0) | N/A | N/A | 29.0 | |
| March 20, 2019, 6 p.m. | N/A | -0.2 ppb (0) | 3.6 ppb (3) | N/A | 3.8 ppb (4) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 20, 2019, 5 p.m. | N/A | -0.2 ppb (0) | 3.7 ppb (3) | N/A | 3.9 ppb (4) | 0.0 ppb (0) | 39.0 ppb (30) | 0.0 ppb (0) | N/A | N/A | 30.0 | |
| March 20, 2019, 4 p.m. | N/A | 0.0 ppb (0) | 4.0 ppb (4) | N/A | 4.0 ppb (4) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 20, 2019, 3 p.m. | N/A | 0.1 ppb (0) | 4.4 ppb (4) | N/A | 4.3 ppb (4) | 0.0 ppb (0) | 37.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 20, 2019, 2 p.m. | N/A | 0.1 ppb (0) | 6.2 ppb (6) | N/A | 6.1 ppb (6) | 0.0 ppb (0) | 35.0 ppb (27) | 0.0 ppb (0) | N/A | N/A | 27.0 | |
| March 20, 2019, 1 p.m. | N/A | 0.0 ppb (0) | 6.1 ppb (6) | N/A | 6.1 ppb (6) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 20, 2019, noon | N/A | -0.1 ppb (0) | 5.7 ppb (5) | N/A | 5.8 ppb (5) | 0.0 ppb (0) | 27.0 ppb (21) | 0.0 ppb (0) | N/A | N/A | 21.0 | |
| March 20, 2019, 11 a.m. | N/A | 0.0 ppb (0) | 6.0 ppb (6) | N/A | 6.0 ppb (6) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 20, 2019, 10 a.m. | N/A | 0.2 ppb (0) | 6.5 ppb (6) | N/A | 6.3 ppb (6) | N/A | 23.0 ppb (18) | N/A | N/A | N/A | 18.0 | |
| March 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.0 ppb (0) | N/A | N/A | 18.0 | |
| March 20, 2019, 7 a.m. | N/A | 0.0 ppb (0) | 5.3 ppb (5) | N/A | 5.2 ppb (5) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 20, 2019, 6 a.m. | N/A | -0.1 ppb (0) | 5.5 ppb (5) | N/A | 5.6 ppb (5) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 20, 2019, 5 a.m. | N/A | -0.2 ppb (0) | 4.0 ppb (4) | N/A | 4.2 ppb (4) | 0.0 ppb (0) | 33.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 20, 2019, 4 a.m. | N/A | -0.1 ppb (0) | 5.2 ppb (5) | N/A | 5.3 ppb (5) | 0.0 ppb (0) | 33.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 20, 2019, 3 a.m. | N/A | 0.0 ppb (0) | 7.7 ppb (7) | N/A | 7.7 ppb (7) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 20, 2019, 2 a.m. | N/A | 0.1 ppb (0) | 13.3 ppb (12) | N/A | 13.3 ppb (12) | 0.0 ppb (0) | 26.0 ppb (20) | 0.0 ppb (0) | N/A | N/A | 20.0 | |
| March 20, 2019, 1 a.m. | N/A | 0.1 ppb (0) | 5.6 ppb (5) | N/A | 5.6 ppb (5) | 0.0 ppb (0) | 38.0 ppb (29) | 0.0 ppb (0) | N/A | N/A | 29.0 | |
| March 20, 2019, midnight | N/A | 0.0 ppb (0) | 3.4 ppb (3) | N/A | 3.4 ppb (3) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 19, 2019, 11 p.m. | N/A | -0.1 ppb (0) | 2.9 ppb (3) | N/A | 2.9 ppb (3) | 0.0 ppb (0) | 50.0 ppb (38) | 0.0 ppb (0) | N/A | N/A | 38.0 | |
| March 19, 2019, 10 p.m. | N/A | -0.1 ppb (0) | 2.5 ppb (2) | N/A | 2.5 ppb (2) | 0.0 ppb (0) | 53.0 ppb (41) | 0.0 ppb (0) | N/A | N/A | 41.0 | |
| March 19, 2019, 9 p.m. | N/A | -0.1 ppb (0) | 2.4 ppb (2) | N/A | 2.5 ppb (2) | 0.0 ppb (0) | 54.0 ppb (42) | 0.0 ppb (0) | N/A | N/A | 42.0 | |
| March 19, 2019, 8 p.m. | N/A | 0.0 ppb (0) | 2.4 ppb (2) | N/A | 2.4 ppb (2) | 0.0 ppb (0) | 53.0 ppb (41) | 0.0 ppb (0) | N/A | N/A | 41.0 | |
| March 19, 2019, 7 p.m. | N/A | 0.1 ppb (0) | 2.5 ppb (2) | N/A | 2.4 ppb (2) | 0.0 ppb (0) | 52.0 ppb (40) | 0.0 ppb (0) | N/A | N/A | 40.0 | |
| March 19, 2019, 6 p.m. | N/A | 0.0 ppb (0) | 2.3 ppb (2) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 52.0 ppb (40) | 0.0 ppb (0) | N/A | N/A | 40.0 | |
| March 19, 2019, 5 p.m. | N/A | -0.1 ppb (0) | 2.3 ppb (2) | N/A | 2.4 ppb (2) | 0.0 ppb (0) | 51.0 ppb (39) | 0.0 ppb (0) | N/A | N/A | 39.0 | |
| March 19, 2019, 4 p.m. | N/A | -0.1 ppb (0) | 2.5 ppb (2) | N/A | 2.7 ppb (3) | 0.0 ppb (0) | 49.0 ppb (38) | 0.0 ppb (0) | N/A | N/A | 38.0 | |
| March 19, 2019, 3 p.m. | N/A | 0.4 ppb (0) | 4.9 ppb (5) | N/A | 4.4 ppb (4) | 0.0 ppb (0) | 41.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 19, 2019, 2 p.m. | N/A | 2.2 ppb (2) | 12.0 ppb (11) | N/A | 9.9 ppb (9) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| March 19, 2019, noon | N/A | 0.9 ppb (1) | 16.5 ppb (15) | N/A | 15.6 ppb (14) | 0.0 ppb (0) | 26.0 ppb (20) | 0.0 ppb (0) | N/A | N/A | 20.0 | |
| March 19, 2019, 11 a.m. | N/A | -0.1 ppb (0) | 12.1 ppb (11) | N/A | 12.2 ppb (11) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 19, 2019, 10 a.m. | N/A | -0.1 ppb (0) | 13.3 ppb (12) | N/A | 13.4 ppb (12) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 19, 2019, 9 a.m. | N/A | -0.1 ppb (0) | 5.7 ppb (5) | N/A | 5.8 ppb (5) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 19, 2019, 7 a.m. | N/A | -0.1 ppb (0) | 10.8 ppb (10) | N/A | 10.8 ppb (10) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 19, 2019, 6 a.m. | N/A | 0.0 ppb (0) | 10.9 ppb (10) | N/A | 10.9 ppb (10) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 19, 2019, 5 a.m. | N/A | 0.0 ppb (0) | 20.8 ppb (19) | N/A | 20.8 ppb (19) | 0.0 ppb (0) | 20.0 ppb (15) | 0.0 ppb (0) | N/A | N/A | 19.0 | |
| March 19, 2019, 4 a.m. | N/A | 0.0 ppb (0) | 15.2 ppb (14) | N/A | 15.2 ppb (14) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 19, 2019, 3 a.m. | N/A | -0.1 ppb (0) | 19.4 ppb (18) | N/A | 19.5 ppb (18) | 0.0 ppb (0) | 26.0 ppb (20) | 0.0 ppb (0) | N/A | N/A | 20.0 | |
| March 19, 2019, 2 a.m. | N/A | -0.1 ppb (0) | 16.4 ppb (15) | N/A | 16.6 ppb (15) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 19, 2019, 1 a.m. | N/A | -0.1 ppb (0) | 8.7 ppb (8) | N/A | 8.9 ppb (8) | 0.0 ppb (0) | 37.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 19, 2019, midnight | N/A | -0.2 ppb (0) | 3.7 ppb (3) | N/A | 3.9 ppb (4) | 0.0 ppb (0) | 43.0 ppb (33) | 0.0 ppb (0) | N/A | N/A | 33.0 | |
| March 18, 2019, 11 p.m. | N/A | -0.1 ppb (0) | 3.0 ppb (3) | N/A | 3.1 ppb (3) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 18, 2019, 10 p.m. | N/A | -0.1 ppb (0) | 2.2 ppb (2) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 48.0 ppb (37) | 0.0 ppb (0) | N/A | N/A | 37.0 | |
| March 18, 2019, 9 p.m. | N/A | -0.2 ppb (0) | 1.5 ppb (1) | N/A | 1.7 ppb (2) | 0.0 ppb (0) | 49.0 ppb (38) | 0.0 ppb (0) | N/A | N/A | 38.0 | |
| March 18, 2019, 8 p.m. | N/A | -0.2 ppb (0) | 1.5 ppb (1) | N/A | 1.7 ppb (2) | 0.0 ppb (0) | 50.0 ppb (38) | 0.0 ppb (0) | N/A | N/A | 38.0 | |
| March 18, 2019, 7 p.m. | N/A | -0.2 ppb (0) | 1.8 ppb (2) | N/A | 2.0 ppb (2) | 0.0 ppb (0) | 51.0 ppb (39) | 0.0 ppb (0) | N/A | N/A | 39.0 | |
| March 18, 2019, 6 p.m. | N/A | -0.3 ppb (0) | 1.8 ppb (2) | N/A | 2.1 ppb (2) | 0.0 ppb (0) | 51.0 ppb (39) | 0.0 ppb (0) | N/A | N/A | 39.0 | |
| March 18, 2019, 5 p.m. | N/A | -0.4 ppb (0) | 1.9 ppb (2) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 49.0 ppb (38) | 0.0 ppb (0) | N/A | N/A | 38.0 | |
| March 18, 2019, 4 p.m. | N/A | 0.4 ppb (0) | 2.2 ppb (2) | N/A | 1.8 ppb (2) | 0.0 ppb (0) | 48.0 ppb (37) | 0.0 ppb (0) | N/A | N/A | 37.0 | |
| March 18, 2019, 3 p.m. | N/A | 1.0 ppb (1) | 2.6 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 18, 2019, 2 p.m. | N/A | 1.0 ppb (1) | 2.6 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 39.0 ppb (30) | 0.0 ppb (0) | N/A | N/A | 30.0 | |
| March 18, 2019, 1 p.m. | N/A | 1.0 ppb (1) | 3.3 ppb (3) | N/A | 2.2 ppb (2) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 18, 2019, 11 a.m. | N/A | 0.7 ppb (1) | 2.4 ppb (2) | N/A | 1.7 ppb (2) | 0.0 ppb (0) | 33.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 18, 2019, 10 a.m. | N/A | 0.8 ppb (1) | 2.9 ppb (3) | N/A | 2.1 ppb (2) | N/A | 30.0 ppb (23) | N/A | N/A | N/A | 23.0 | |
| March 18, 2019, 9 a.m. | N/A | 0.8 ppb (1) | 3.1 ppb (3) | N/A | 2.3 ppb (2) | N/A | N/A | N/A | N/A | N/A | 3.0 | |
| March 18, 2019, 7 a.m. | N/A | 0.8 ppb (1) | 3.3 ppb (3) | N/A | 2.5 ppb (2) | 0.0 ppb (0) | 23.0 ppb (18) | 0.0 ppb (0) | N/A | N/A | 18.0 | |
| March 18, 2019, 6 a.m. | N/A | 0.8 ppb (1) | 3.1 ppb (3) | N/A | 2.4 ppb (2) | 0.0 ppb (0) | 29.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 18, 2019, 5 a.m. | N/A | 0.8 ppb (1) | 2.6 ppb (2) | N/A | 1.8 ppb (2) | 0.0 ppb (0) | 31.0 ppb (24) | 0.0 ppb (0) | N/A | N/A | 24.0 | |
| March 18, 2019, 4 a.m. | N/A | 0.7 ppb (1) | 2.6 ppb (2) | N/A | 1.9 ppb (2) | 0.0 ppb (0) | 36.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 18, 2019, 3 a.m. | N/A | 0.6 ppb (1) | 2.1 ppb (2) | N/A | 1.5 ppb (1) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 18, 2019, 2 a.m. | N/A | 0.5 ppb (0) | 2.0 ppb (2) | N/A | 1.4 ppb (1) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 18, 2019, 1 a.m. | N/A | 0.5 ppb (0) | 2.1 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 33.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 18, 2019, midnight | N/A | 0.3 ppb (0) | 1.2 ppb (1) | N/A | 0.8 ppb (1) | 0.0 ppb (0) | 41.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 17, 2019, 11 p.m. | N/A | 0.2 ppb (0) | 0.8 ppb (1) | N/A | 0.6 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.0 ppb (0) | N/A | N/A | 34.0 | |
| March 17, 2019, 10 p.m. | N/A | 0.2 ppb (0) | 0.8 ppb (1) | N/A | 0.6 ppb (1) | 0.0 ppb (0) | 46.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 17, 2019, 9 p.m. | N/A | 0.2 ppb (0) | 0.7 ppb (1) | N/A | 0.6 ppb (1) | 0.0 ppb (0) | 46.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 17, 2019, 8 p.m. | N/A | 0.2 ppb (0) | 1.0 ppb (1) | N/A | 0.9 ppb (1) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 17, 2019, 7 p.m. | N/A | 0.1 ppb (0) | 0.9 ppb (1) | N/A | 0.8 ppb (1) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 17, 2019, 6 p.m. | N/A | 0.2 ppb (0) | 0.9 ppb (1) | N/A | 0.8 ppb (1) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 17, 2019, 5 p.m. | N/A | 0.2 ppb (0) | 0.9 ppb (1) | N/A | 0.6 ppb (1) | 0.0 ppb (0) | 43.0 ppb (33) | 0.0 ppb (0) | N/A | N/A | 33.0 | |
| March 17, 2019, 4 p.m. | N/A | 0.4 ppb (0) | 1.3 ppb (1) | N/A | 1.0 ppb (1) | 0.0 ppb (0) | 41.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 17, 2019, 3 p.m. | N/A | 0.8 ppb (1) | 2.5 ppb (2) | N/A | 1.7 ppb (2) | 0.0 ppb (0) | 36.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 17, 2019, 2 p.m. | N/A | 1.6 ppb (1) | 4.8 ppb (4) | N/A | 3.2 ppb (3) | 0.0 ppb (0) | 30.0 ppb (23) | 0.0 ppb (0) | N/A | N/A | 23.0 | |
| March 17, 2019, 1 p.m. | N/A | 0.9 ppb (1) | 3.2 ppb (3) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 25.0 ppb (19) | 0.0 ppb (0) | N/A | N/A | 19.0 | |
| March 17, 2019, noon | N/A | 0.4 ppb (0) | 3.4 ppb (3) | N/A | 3.0 ppb (3) | 0.0 ppb (0) | 23.0 ppb (18) | 0.0 ppb (0) | N/A | N/A | 18.0 | |
| March 17, 2019, 11 a.m. | N/A | 0.3 ppb (0) | 3.7 ppb (3) | N/A | 3.4 ppb (3) | 0.0 ppb (0) | 23.0 ppb (18) | 0.0 ppb (0) | N/A | N/A | 18.0 | |
| March 17, 2019, 10 a.m. | N/A | 0.4 ppb (0) | 4.4 ppb (4) | N/A | 4.0 ppb (4) | 0.0 ppb (0) | 22.0 ppb (17) | 0.0 ppb (0) | N/A | N/A | 17.0 | |
| March 17, 2019, 9 a.m. | N/A | 0.7 ppb (1) | 6.6 ppb (6) | N/A | 5.9 ppb (5) | 0.0 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | 6.0 | |
| March 17, 2019, 7 a.m. | N/A | 0.7 ppb (1) | 6.1 ppb (6) | N/A | 5.4 ppb (5) | 0.0 ppb (0) | 25.0 ppb (19) | 0.0 ppb (0) | N/A | N/A | 19.0 | |
| March 17, 2019, 6 a.m. | N/A | 0.7 ppb (1) | 5.6 ppb (5) | N/A | 4.9 ppb (5) | 0.0 ppb (0) | 28.0 ppb (22) | 0.0 ppb (0) | N/A | N/A | 22.0 | |
| March 17, 2019, 5 a.m. | N/A | 0.7 ppb (1) | 9.3 ppb (9) | N/A | 8.7 ppb (8) | 0.0 ppb (0) | 27.0 ppb (21) | 0.0 ppb (0) | N/A | N/A | 21.0 | |
| March 17, 2019, 4 a.m. | N/A | 0.7 ppb (1) | 11.7 ppb (11) | N/A | 11.0 ppb (10) | 0.0 ppb (0) | 21.0 ppb (16) | 0.0 ppb (0) | N/A | N/A | 16.0 | |
| March 17, 2019, 3 a.m. | N/A | 0.6 ppb (1) | 2.2 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 17, 2019, 2 a.m. | N/A | 0.5 ppb (0) | 1.9 ppb (2) | N/A | 1.4 ppb (1) | 0.0 ppb (0) | 42.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 17, 2019, 1 a.m. | N/A | 0.4 ppb (0) | 1.3 ppb (1) | N/A | 1.0 ppb (1) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 17, 2019, midnight | N/A | 0.2 ppb (0) | 1.1 ppb (1) | N/A | 0.9 ppb (1) | 0.0 ppb (0) | 40.0 ppb (31) | 0.0 ppb (0) | N/A | N/A | 31.0 | |
| March 16, 2019, 11 p.m. | N/A | -0.1 ppb (0) | 0.8 ppb (1) | N/A | 0.8 ppb (1) | 0.0 ppb (0) | 42.0 ppb (32) | 0.0 ppb (0) | N/A | N/A | 32.0 | |
| March 16, 2019, 10 p.m. | N/A | -0.1 ppb (0) | 0.8 ppb (1) | N/A | 0.9 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.0 ppb (0) | N/A | N/A | 34.0 | |
| March 16, 2019, 9 p.m. | N/A | -0.2 ppb (0) | 0.8 ppb (1) | N/A | 1.1 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.0 ppb (0) | N/A | N/A | 34.0 | |
| March 16, 2019, 8 p.m. | N/A | -0.3 ppb (0) | 0.9 ppb (1) | N/A | 1.2 ppb (1) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 16, 2019, 7 p.m. | N/A | -0.3 ppb (0) | 1.0 ppb (1) | N/A | 1.3 ppb (1) | 0.0 ppb (0) | 45.0 ppb (35) | 0.0 ppb (0) | N/A | N/A | 35.0 | |
| March 16, 2019, 6 p.m. | N/A | -0.4 ppb (0) | 1.0 ppb (1) | N/A | 1.4 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.0 ppb (0) | N/A | N/A | 34.0 | |
| March 16, 2019, 5 p.m. | N/A | -0.2 ppb (0) | 1.3 ppb (1) | N/A | 1.5 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.0 ppb (0) | N/A | N/A | 34.0 | |
| March 16, 2019, 4 p.m. | N/A | 0.2 ppb (0) | 1.6 ppb (1) | N/A | 1.4 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.0 ppb (0) | N/A | N/A | 34.0 | |
| March 16, 2019, 3 p.m. | N/A | 0.2 ppb (0) | 1.6 ppb (1) | N/A | 1.4 ppb (1) | 0.0 ppb (0) | 43.0 ppb (33) | 0.0 ppb (0) | N/A | N/A | 33.0 | |
| March 16, 2019, 2 p.m. | N/A | 0.2 ppb (0) | 1.8 ppb (2) | N/A | 1.6 ppb (1) | 0.0 ppb (0) | 39.0 ppb (30) | 0.0 ppb (0) | N/A | N/A | 30.0 | |
| March 16, 2019, 1 p.m. | N/A | 0.3 ppb (0) | 2.6 ppb (2) | N/A | 2.3 ppb (2) | 0.0 ppb (0) | 35.0 ppb (27) | 0.0 ppb (0) | N/A | N/A | 27.0 | |
| March 16, 2019, noon | N/A | 0.1 ppb (0) | 2.8 ppb (3) | N/A | 2.7 ppb (3) | 0.0 ppb (0) | 34.0 ppb (26) | 0.0 ppb (0) | N/A | N/A | 26.0 | |
| March 16, 2019, 11 a.m. | N/A | 0.0 ppb (0) | 2.8 ppb (3) | N/A | 2.8 ppb (3) | 0.0 ppb (0) | 35.0 ppb (27) | 0.0 ppb (0) | N/A | N/A | 27.0 | |
| March 16, 2019, 10 a.m. | N/A | 0.0 ppb (0) | 2.4 ppb (2) | N/A | 2.4 ppb (2) | N/A | 36.0 ppb (28) | N/A | N/A | N/A | 28.0 | |
| March 16, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.0 ppb (0) | N/A | N/A | 28.0 | |
| March 16, 2019, 7 a.m. | N/A | 0.0 ppb (0) | 2.1 ppb (2) | N/A | 2.0 ppb (2) | 0.0 ppb (0) | 38.0 ppb (29) | 0.0 ppb (0) | N/A | N/A | 29.0 | |
| March 16, 2019, 6 a.m. | N/A | 0.0 ppb (0) | 1.5 ppb (1) | N/A | 1.5 ppb (1) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 16, 2019, 5 a.m. | N/A | 0.0 ppb (0) | 1.3 ppb (1) | N/A | 1.2 ppb (1) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 16, 2019, 4 a.m. | N/A | -0.1 ppb (0) | 1.1 ppb (1) | N/A | 1.2 ppb (1) | 0.0 ppb (0) | 33.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 | |
| March 16, 2019, 3 a.m. | N/A | -0.1 ppb (0) | 1.0 ppb (1) | N/A | 1.1 ppb (1) | 0.0 ppb (0) | 32.0 ppb (25) | 0.0 ppb (0) | N/A | N/A | 25.0 |