Bridgeton MO, US: 38.75264, -90.44884
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 23, 2019, 10 a.m. | 25.1 ppb (23) | 8.3 ppb (8) | N/A | 17.0 ppb (16) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 23.0 | |
| May 23, 2019, 9 a.m. | 10.0 ppb (9) | 1.7 ppb (2) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 9.0 | |
| May 23, 2019, 8 a.m. | 4.7 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| May 23, 2019, 7 a.m. | 4.1 ppb (4) | 0.4 ppb (0) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| May 23, 2019, 6 a.m. | 2.5 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 23, 2019, 5 a.m. | 4.5 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| May 23, 2019, 4 a.m. | 6.2 ppb (6) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 6.0 | |
| May 23, 2019, 3 a.m. | 8.5 ppb (8) | 2.8 ppb (3) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 23, 2019, 2 a.m. | 8.2 ppb (8) | 2.8 ppb (3) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 23, 2019, 1 a.m. | 9.6 ppb (9) | 3.6 ppb (3) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 23, 2019, midnight | 11.2 ppb (10) | 4.8 ppb (4) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 10.0 | |
| May 22, 2019, 11 p.m. | 12.5 ppb (12) | 5.4 ppb (5) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 12.0 | |
| May 22, 2019, 10 p.m. | 14.2 ppb (13) | 7.3 ppb (7) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 13.0 | |
| May 22, 2019, 9 p.m. | 12.8 ppb (12) | 5.9 ppb (5) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 12.0 | |
| May 22, 2019, 8 p.m. | 24.4 ppb (23) | 14.1 ppb (13) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 23.0 | |
| May 22, 2019, 7 p.m. | 16.3 ppb (15) | 6.8 ppb (6) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 15.0 | |
| May 22, 2019, 6 p.m. | 19.5 ppb (18) | 8.7 ppb (8) | N/A | 11.0 ppb (10) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 18.0 | |
| May 22, 2019, 5 p.m. | 20.2 ppb (19) | 8.8 ppb (8) | N/A | 11.0 ppb (10) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 19.0 | |
| May 22, 2019, 4 p.m. | 21.2 ppb (20) | 9.3 ppb (9) | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 20.0 | |
| May 22, 2019, 3 p.m. | 27.0 ppb (25) | 13.1 ppb (12) | N/A | 14.0 ppb (13) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 25.0 | |
| May 22, 2019, 2 p.m. | 31.1 ppb (29) | 14.4 ppb (13) | N/A | 17.0 ppb (16) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 29.0 | |
| May 22, 2019, 1 p.m. | 30.3 ppb (28) | 14.3 ppb (13) | N/A | 16.0 ppb (15) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 28.0 | |
| May 22, 2019, noon | 29.2 ppb (27) | 13.0 ppb (12) | N/A | 16.0 ppb (15) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 27.0 | |
| May 22, 2019, 11 a.m. | 27.3 ppb (25) | 10.6 ppb (10) | N/A | 17.0 ppb (16) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 25.0 | |
| May 22, 2019, 10 a.m. | 21.4 ppb (20) | 7.7 ppb (7) | N/A | 14.0 ppb (13) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 20.0 | |
| May 22, 2019, 9 a.m. | 10.5 ppb (10) | 3.0 ppb (3) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 10.0 | |
| May 22, 2019, 8 a.m. | 7.4 ppb (7) | 1.8 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 7.0 | |
| May 22, 2019, 7 a.m. | 7.0 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 6.0 | |
| May 22, 2019, 6 a.m. | 8.2 ppb (8) | 1.8 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 22, 2019, 5 a.m. | 8.3 ppb (8) | 1.2 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 22, 2019, 4 a.m. | 9.8 ppb (9) | 2.0 ppb (2) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 9.0 | |
| May 22, 2019, 3 a.m. | 8.5 ppb (8) | 1.4 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 22, 2019, 2 a.m. | 8.2 ppb (8) | 0.7 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 22, 2019, 1 a.m. | 13.2 ppb (12) | 2.3 ppb (2) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 12.0 | |
| May 22, 2019, midnight | 5.9 ppb (5) | 1.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 5.0 | |
| May 21, 2019, 11 p.m. | 5.1 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 5.0 | |
| May 21, 2019, 10 p.m. | 6.9 ppb (6) | 0.7 ppb (1) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 6.0 | |
| May 21, 2019, 9 p.m. | 9.5 ppb (9) | 2.7 ppb (3) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 21, 2019, 8 p.m. | 8.5 ppb (8) | 2.2 ppb (2) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 21, 2019, 7 p.m. | 12.1 ppb (11) | 4.8 ppb (4) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 11.0 | |
| May 21, 2019, 6 p.m. | 22.0 ppb (20) | 12.9 ppb (12) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 20.0 | |
| May 21, 2019, 5 p.m. | 25.7 ppb (24) | 15.7 ppb (15) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 24.0 | |
| May 21, 2019, 4 p.m. | 25.4 ppb (24) | 15.7 ppb (15) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 24.0 | |
| May 21, 2019, 3 p.m. | 25.7 ppb (24) | 16.5 ppb (15) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 24.0 | |
| May 21, 2019, 2 p.m. | 21.8 ppb (20) | 13.9 ppb (13) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 20.0 | |
| May 21, 2019, 1 p.m. | 15.9 ppb (15) | 8.8 ppb (8) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 15.0 | |
| May 21, 2019, noon | 15.2 ppb (14) | 8.0 ppb (7) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 14.0 | |
| May 21, 2019, 11 a.m. | 5.9 ppb (5) | 1.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 5.0 | |
| May 21, 2019, 10 a.m. | 2.4 ppb (2) | 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 | |
| May 21, 2019, 9 a.m. | 1.6 ppb (1) | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 21, 2019, 8 a.m. | 1.4 ppb (1) | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 21, 2019, 7 a.m. | 3.4 ppb (3) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 21, 2019, 6 a.m. | 2.3 ppb (2) | -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 | |
| May 21, 2019, 5 a.m. | 2.3 ppb (2) | -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 | |
| May 21, 2019, 4 a.m. | 2.7 ppb (3) | -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 | |
| May 21, 2019, 3 a.m. | 2.9 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 21, 2019, 2 a.m. | 2.5 ppb (2) | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 21, 2019, 1 a.m. | 1.2 ppb (1) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 21, 2019, midnight | 1.2 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 11 p.m. | 1.0 ppb (1) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 10 p.m. | 0.9 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 9 p.m. | 1.4 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 8 p.m. | 1.6 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 7 p.m. | 3.3 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 20, 2019, 6 p.m. | 3.9 ppb (4) | 1.8 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| May 20, 2019, 5 p.m. | 3.0 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 20, 2019, 4 p.m. | 2.2 ppb (2) | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 20, 2019, 3 p.m. | 8.3 ppb (8) | 4.7 ppb (4) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 20, 2019, 2 p.m. | 14.1 ppb (13) | 8.5 ppb (8) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 13.0 | |
| May 20, 2019, 1 p.m. | 9.1 ppb (8) | 5.1 ppb (5) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 20, 2019, noon | 9.3 ppb (9) | 4.3 ppb (4) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 9.0 | |
| May 20, 2019, 11 a.m. | 16.2 ppb (15) | 7.7 ppb (7) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 15.0 | |
| May 20, 2019, 10 a.m. | 7.5 ppb (7) | 0.4 ppb (0) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 7.0 | |
| May 20, 2019, 9 a.m. | 3.2 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 20, 2019, 8 a.m. | 1.3 ppb (1) | -0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 7 a.m. | 7.8 ppb (7) | 0.9 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 7.0 | |
| May 20, 2019, 6 a.m. | 10.8 ppb (10) | 3.1 ppb (3) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 10.0 | |
| May 20, 2019, 5 a.m. | 7.5 ppb (7) | 2.6 ppb (2) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| May 20, 2019, 4 a.m. | 0.7 ppb (1) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 3 a.m. | 0.5 ppb (0) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, 2 a.m. | 5.4 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 5.0 | |
| May 20, 2019, 1 a.m. | 1.3 ppb (1) | -0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 20, 2019, midnight | 5.9 ppb (5) | 1.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 5.0 | |
| May 19, 2019, 11 p.m. | 7.8 ppb (7) | 3.3 ppb (3) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 7.0 | |
| May 19, 2019, 10 p.m. | 8.4 ppb (8) | 3.5 ppb (3) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 19, 2019, 9 p.m. | 6.9 ppb (6) | 3.1 ppb (3) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 6.0 | |
| May 19, 2019, 8 p.m. | 7.2 ppb (7) | 3.1 ppb (3) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 7.0 | |
| May 19, 2019, 7 p.m. | 6.8 ppb (6) | 3.3 ppb (3) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 6.0 | |
| May 19, 2019, 6 p.m. | 7.7 ppb (7) | 3.9 ppb (4) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 7.0 | |
| May 19, 2019, 5 p.m. | 5.0 ppb (5) | 2.6 ppb (2) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 5.0 | |
| May 19, 2019, 4 p.m. | 8.7 ppb (8) | 4.1 ppb (4) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 8.0 | |
| May 19, 2019, 3 p.m. | 5.4 ppb (5) | 2.6 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 5.0 | |
| May 19, 2019, 2 p.m. | 4.3 ppb (4) | 2.1 ppb (2) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| May 19, 2019, 1 p.m. | 3.1 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 19, 2019, noon | 2.5 ppb (2) | 1.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 19, 2019, 11 a.m. | 2.3 ppb (2) | 0.9 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 19, 2019, 10 a.m. | 1.5 ppb (1) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 19, 2019, 9 a.m. | 1.4 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 1.0 | |
| May 19, 2019, 8 a.m. | 2.4 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 19, 2019, 7 a.m. | 1.9 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 2.0 | |
| May 19, 2019, 6 a.m. | 2.9 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 3.0 | |
| May 19, 2019, 5 a.m. | 3.9 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| May 19, 2019, 4 a.m. | 5.9 ppb (5) | 1.3 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 5.0 | |
| May 19, 2019, 3 a.m. | 8.3 ppb (8) | 2.0 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 8.0 | |
| May 19, 2019, 2 a.m. | 9.3 ppb (9) | 2.4 ppb (2) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 9.0 | |
| May 19, 2019, 1 a.m. | 5.2 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 5.0 | |
| May 19, 2019, midnight | 9.0 ppb (8) | 2.3 ppb (2) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 18, 2019, 11 p.m. | 9.1 ppb (8) | 3.3 ppb (3) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 18, 2019, 10 p.m. | 8.2 ppb (8) | 3.2 ppb (3) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 18, 2019, 9 p.m. | 9.1 ppb (8) | 3.6 ppb (3) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 18, 2019, 8 p.m. | 9.6 ppb (9) | 4.0 ppb (4) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 18, 2019, 7 p.m. | 7.8 ppb (7) | 3.3 ppb (3) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| May 18, 2019, 6 p.m. | 7.1 ppb (7) | 3.2 ppb (3) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| May 18, 2019, 5 p.m. | 10.0 ppb (9) | 4.8 ppb (4) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 18, 2019, 4 p.m. | 7.5 ppb (7) | 3.3 ppb (3) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| May 18, 2019, 3 p.m. | 9.2 ppb (9) | 4.0 ppb (4) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 18, 2019, 2 p.m. | 9.4 ppb (9) | 4.0 ppb (4) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 18, 2019, 1 p.m. | 13.3 ppb (12) | 4.9 ppb (5) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 12.0 | |
| May 18, 2019, noon | 17.4 ppb (16) | 5.4 ppb (5) | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 16.0 | |
| May 18, 2019, 11 a.m. | 15.8 ppb (15) | 3.6 ppb (3) | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 15.0 | |
| May 18, 2019, 10 a.m. | 9.3 ppb (9) | 2.1 ppb (2) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 18, 2019, 9 a.m. | 9.4 ppb (9) | 1.2 ppb (1) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 9.0 | |
| May 18, 2019, 8 a.m. | 10.5 ppb (10) | 1.1 ppb (1) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 10.0 | |
| May 18, 2019, 7 a.m. | 7.5 ppb (7) | 0.8 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| May 18, 2019, 6 a.m. | 6.8 ppb (6) | 1.5 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 6.0 | |
| May 18, 2019, 5 a.m. | 5.6 ppb (5) | 1.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 5.0 | |
| May 18, 2019, 4 a.m. | 6.2 ppb (6) | 1.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 6.0 | |
| May 18, 2019, 3 a.m. | 9.0 ppb (8) | 3.1 ppb (3) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 18, 2019, 2 a.m. | 13.5 ppb (12) | 3.5 ppb (3) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 12.0 | |
| May 18, 2019, 1 a.m. | 11.8 ppb (11) | 3.1 ppb (3) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 11.0 | |
| May 18, 2019, midnight | 12.8 ppb (12) | 4.4 ppb (4) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 12.0 | |
| May 17, 2019, 11 p.m. | 16.4 ppb (15) | 5.8 ppb (5) | N/A | 11.0 ppb (10) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 15.0 | |
| May 17, 2019, 10 p.m. | 15.8 ppb (15) | 6.2 ppb (6) | N/A | 10.0 ppb (9) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 15.0 | |
| May 17, 2019, 9 p.m. | 20.3 ppb (19) | 8.6 ppb (8) | N/A | 12.0 ppb (11) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 19.0 | |
| May 17, 2019, 8 p.m. | 24.2 ppb (22) | 9.9 ppb (9) | N/A | 14.0 ppb (13) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 22.0 | |
| May 17, 2019, 7 p.m. | 22.8 ppb (21) | 9.4 ppb (9) | N/A | 13.0 ppb (12) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 21.0 | |
| May 17, 2019, 6 p.m. | 21.7 ppb (20) | 7.6 ppb (7) | N/A | 14.0 ppb (13) | N/A | 9.0 ppb (13) | N/A | N/A | N/A | N/A | 20.0 | |
| May 17, 2019, 5 p.m. | 18.8 ppb (17) | 7.8 ppb (7) | N/A | 11.0 ppb (10) | N/A | 5.0 ppb (7) | N/A | N/A | N/A | N/A | 17.0 | |
| May 17, 2019, 4 p.m. | 16.9 ppb (16) | 6.5 ppb (6) | N/A | 10.0 ppb (9) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 16.0 | |
| May 17, 2019, 3 p.m. | 16.7 ppb (15) | 6.6 ppb (6) | N/A | 10.0 ppb (9) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 15.0 | |
| May 17, 2019, 2 p.m. | 19.3 ppb (18) | 8.0 ppb (7) | N/A | 11.0 ppb (10) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | N/A | 18.0 | |
| May 17, 2019, 1 p.m. | 25.2 ppb (23) | 9.8 ppb (9) | N/A | 15.0 ppb (14) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | N/A | 23.0 | |
| May 17, 2019, noon | 31.3 ppb (29) | 9.8 ppb (9) | N/A | 21.0 ppb (19) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 29.0 | |
| May 17, 2019, 11 a.m. | 32.6 ppb (30) | 10.2 ppb (9) | N/A | 22.0 ppb (20) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 30.0 | |
| May 17, 2019, 10 a.m. | 33.3 ppb (31) | 8.7 ppb (8) | N/A | 24.0 ppb (22) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 31.0 | |
| May 17, 2019, 9 a.m. | 19.7 ppb (18) | 3.2 ppb (3) | N/A | 16.0 ppb (15) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 18.0 | |
| May 17, 2019, 8 a.m. | 27.1 ppb (25) | 4.5 ppb (4) | N/A | 23.0 ppb (21) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 25.0 | |
| May 17, 2019, 7 a.m. | 8.6 ppb (8) | 1.0 ppb (1) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 8.0 | |
| May 17, 2019, 6 a.m. | 7.9 ppb (7) | 0.9 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| May 17, 2019, 5 a.m. | 6.3 ppb (6) | 0.4 ppb (0) | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 6.0 | |
| May 17, 2019, 4 a.m. | 8.9 ppb (8) | 0.9 ppb (1) | N/A | 8.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 8.0 | |
| May 17, 2019, 3 a.m. | 10.8 ppb (10) | 1.9 ppb (2) | N/A | 9.0 ppb (8) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 10.0 | |
| May 17, 2019, 2 a.m. | 10.8 ppb (10) | 2.7 ppb (3) | N/A | 8.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 10.0 | |
| May 17, 2019, 1 a.m. | 7.6 ppb (7) | 0.7 ppb (1) | N/A | 7.0 ppb (6) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | N/A | 7.0 | |
| May 17, 2019, midnight | 12.4 ppb (11) | 3.4 ppb (3) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 11.0 | |
| May 16, 2019, 11 p.m. | 12.2 ppb (11) | 4.2 ppb (4) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 11.0 | |
| May 16, 2019, 10 p.m. | 13.2 ppb (12) | 5.0 ppb (5) | N/A | 8.0 ppb (7) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 12.0 | |
| May 16, 2019, 9 p.m. | 13.6 ppb (13) | 5.2 ppb (5) | N/A | 8.0 ppb (7) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | N/A | 13.0 | |
| May 16, 2019, 8 p.m. | 15.1 ppb (14) | 5.9 ppb (5) | N/A | 9.0 ppb (8) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | N/A | 14.0 | |
| May 16, 2019, 7 p.m. | 15.7 ppb (15) | 6.0 ppb (6) | N/A | 10.0 ppb (9) | N/A | 3.0 ppb (4) | N/A | N/A | N/A | N/A | 15.0 | |
| May 16, 2019, 6 p.m. | 17.3 ppb (16) | 6.2 ppb (6) | N/A | 11.0 ppb (10) | N/A | 5.0 ppb (7) | N/A | N/A | N/A | N/A | 16.0 | |
| May 16, 2019, 5 p.m. | 18.8 ppb (17) | 7.0 ppb (6) | N/A | 12.0 ppb (11) | N/A | 7.0 ppb (10) | N/A | N/A | N/A | N/A | 17.0 | |
| May 16, 2019, 4 p.m. | 16.3 ppb (15) | 6.8 ppb (6) | N/A | 9.0 ppb (8) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 15.0 | |
| May 16, 2019, 3 p.m. | 17.3 ppb (16) | 7.0 ppb (6) | N/A | 10.0 ppb (9) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 16.0 | |
| May 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| May 16, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 3.0 | |
| May 16, 2019, noon | 28.9 ppb (27) | 15.1 ppb (14) | N/A | 14.0 ppb (13) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 27.0 | |
| May 16, 2019, 11 a.m. | 29.8 ppb (28) | 14.9 ppb (14) | N/A | 15.0 ppb (14) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 28.0 |