Bridgeton (Natural Bridge Jct) MO, US: 38.75264, -90.44884
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 26, 2021, 2 p.m. | 28.3 ppb (27) | 10.5 ppb (10) | N/A | 18.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 27.0 | |
| Feb. 26, 2021, 1 p.m. | 21.4 ppb (21) | 3.3 ppb (4) | N/A | 18.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 21.0 | |
| Feb. 26, 2021, noon | 18.8 ppb (18) | 1.0 ppb (1) | N/A | 18.0 ppb (17) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 18.0 | |
| Feb. 26, 2021, 11 a.m. | 13.2 ppb (13) | -0.1 ppb (0) | N/A | 13.0 ppb (13) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 13.0 | |
| Feb. 26, 2021, 10 a.m. | 15.2 ppb (15) | -0.1 ppb (0) | N/A | 15.0 ppb (15) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 15.0 | |
| Feb. 26, 2021, 9 a.m. | 15.8 ppb (15) | -0.1 ppb (0) | N/A | 16.0 ppb (16) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 16.0 | |
| Feb. 26, 2021, 8 a.m. | 16.8 ppb (16) | -0.1 ppb (0) | N/A | 17.0 ppb (17) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 17.0 | |
| Feb. 26, 2021, 7 a.m. | 22.2 ppb (21) | 0.1 ppb (1) | N/A | 22.0 ppb (21) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 21.0 | |
| Feb. 26, 2021, 6 a.m. | 28.8 ppb (28) | 2.1 ppb (2) | N/A | 27.0 ppb (26) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 28.0 | |
| Feb. 26, 2021, 5 a.m. | 26.3 ppb (25) | 1.2 ppb (2) | N/A | 25.0 ppb (24) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 25.0 | |
| Feb. 26, 2021, 4 a.m. | 23.3 ppb (22) | 0.1 ppb (1) | N/A | 23.0 ppb (22) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 22.0 | |
| Feb. 26, 2021, 3 a.m. | 20.8 ppb (20) | 0.6 ppb (1) | N/A | 20.0 ppb (19) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 20.0 | |
| Feb. 26, 2021, 2 a.m. | 16.1 ppb (16) | -0.2 ppb (0) | N/A | 16.0 ppb (16) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 16.0 | |
| Feb. 26, 2021, 1 a.m. | 11.7 ppb (12) | 0.4 ppb (1) | N/A | 11.0 ppb (11) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 12.0 | |
| Feb. 26, 2021, midnight | 9.5 ppb (9) | -0.1 ppb (0) | N/A | 10.0 ppb (10) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 10.0 | |
| Feb. 25, 2021, 11 p.m. | 5.2 ppb (5) | -0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 5.0 | |
| Feb. 25, 2021, 10 p.m. | 2.2 ppb (3) | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 3.0 | |
| Feb. 25, 2021, 9 p.m. | 3.4 ppb (4) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 4.0 | |
| Feb. 25, 2021, 8 p.m. | 2.0 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 2.0 | |
| Feb. 25, 2021, 7 p.m. | 3.2 ppb (4) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 4.0 | |
| Feb. 25, 2021, 6 p.m. | 7.7 ppb (8) | 2.0 ppb (2) | N/A | 6.0 ppb (6) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 8.0 | |
| Feb. 25, 2021, 5 p.m. | 11.6 ppb (11) | 3.6 ppb (4) | N/A | 8.0 ppb (8) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 25, 2021, 4 p.m. | 18.1 ppb (18) | 7.6 ppb (8) | N/A | 10.0 ppb (10) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 18.0 | |
| Feb. 25, 2021, 3 p.m. | 8.6 ppb (9) | 2.4 ppb (3) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 9.0 | |
| Feb. 25, 2021, 2 p.m. | 11.6 ppb (11) | 3.2 ppb (4) | N/A | 8.0 ppb (8) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 25, 2021, 1 p.m. | 11.2 ppb (11) | 1.4 ppb (2) | N/A | 10.0 ppb (10) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 25, 2021, noon | 14.8 ppb (14) | 1.5 ppb (2) | N/A | 13.0 ppb (13) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 25, 2021, 11 a.m. | 11.8 ppb (12) | 0.4 ppb (1) | N/A | 11.0 ppb (11) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 12.0 | |
| Feb. 25, 2021, 10 a.m. | 14.1 ppb (14) | 0.0 ppb (0) | N/A | 14.0 ppb (14) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 25, 2021, 9 a.m. | 13.8 ppb (14) | 0.4 ppb (1) | N/A | 13.0 ppb (13) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 25, 2021, 8 a.m. | 9.4 ppb (9) | -0.2 ppb (0) | N/A | 9.0 ppb (9) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 9.0 | |
| Feb. 25, 2021, 7 a.m. | 5.9 ppb (6) | -0.3 ppb (0) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 6.0 | |
| Feb. 25, 2021, 6 a.m. | 4.9 ppb (5) | -0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 5.0 | |
| Feb. 25, 2021, 5 a.m. | 4.9 ppb (5) | -0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 5.0 | |
| Feb. 25, 2021, 4 a.m. | 5.1 ppb (5) | -0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 5.0 | |
| Feb. 25, 2021, 3 a.m. | 4.9 ppb (5) | -0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 5.0 | |
| Feb. 25, 2021, 2 a.m. | 3.7 ppb (4) | -0.3 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 4.0 | |
| Feb. 25, 2021, 1 a.m. | 3.6 ppb (4) | -0.3 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 4.0 | |
| Feb. 25, 2021, midnight | 3.5 ppb (4) | -0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 4.0 | |
| Feb. 24, 2021, 11 p.m. | 3.3 ppb (4) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 4.0 | |
| Feb. 24, 2021, 10 p.m. | 3.0 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 3.0 | |
| Feb. 24, 2021, 9 p.m. | 2.8 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 3.0 | |
| Feb. 24, 2021, 8 p.m. | 2.6 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 3.0 | |
| Feb. 24, 2021, 7 p.m. | 2.7 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 3.0 | |
| Feb. 24, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 2.0 | |
| Feb. 24, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 2.0 | |
| Feb. 24, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 2.0 | |
| Feb. 24, 2021, 3 p.m. | 7.6 ppb (8) | 3.4 ppb (4) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 8.0 | |
| Feb. 24, 2021, 2 p.m. | 6.7 ppb (7) | 2.0 ppb (2) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 7.0 | |
| Feb. 24, 2021, 1 p.m. | 36.2 ppb (35) | 12.9 ppb (13) | N/A | 24.0 ppb (23) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 35.0 | |
| Feb. 24, 2021, noon | 51.8 ppb (49) | 19.0 ppb (18) | N/A | 34.0 ppb (33) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 49.0 | |
| Feb. 24, 2021, 11 a.m. | 33.8 ppb (32) | 8.0 ppb (8) | N/A | 26.0 ppb (25) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 32.0 | |
| Feb. 24, 2021, 10 a.m. | 14.9 ppb (15) | 3.3 ppb (4) | N/A | 12.0 ppb (12) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 15.0 | |
| Feb. 24, 2021, 9 a.m. | 9.0 ppb (9) | 2.9 ppb (3) | N/A | 7.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 9.0 | |
| Feb. 24, 2021, 8 a.m. | 6.8 ppb (7) | 2.8 ppb (3) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 7.0 | |
| Feb. 24, 2021, 7 a.m. | 6.2 ppb (6) | 2.7 ppb (3) | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 6.0 | |
| Feb. 24, 2021, 6 a.m. | 9.9 ppb (10) | 3.5 ppb (4) | N/A | 7.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 10.0 | |
| Feb. 24, 2021, 5 a.m. | 17.7 ppb (17) | 5.1 ppb (5) | N/A | 13.0 ppb (13) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 17.0 | |
| Feb. 24, 2021, 4 a.m. | 16.5 ppb (16) | 5.3 ppb (5) | N/A | 12.0 ppb (12) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 16.0 | |
| Feb. 24, 2021, 3 a.m. | 17.3 ppb (17) | 6.5 ppb (7) | N/A | 11.0 ppb (11) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 17.0 | |
| Feb. 24, 2021, 2 a.m. | 17.2 ppb (17) | 5.8 ppb (6) | N/A | 12.0 ppb (12) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 17.0 | |
| Feb. 24, 2021, 1 a.m. | 24.1 ppb (23) | 10.0 ppb (10) | N/A | 15.0 ppb (15) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 23.0 | |
| Feb. 24, 2021, midnight | 38.3 ppb (37) | 17.8 ppb (17) | N/A | 21.0 ppb (20) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 37.0 | |
| Feb. 23, 2021, 11 p.m. | 39.5 ppb (38) | 16.4 ppb (16) | N/A | 24.0 ppb (23) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 38.0 | |
| Feb. 23, 2021, 10 p.m. | 37.1 ppb (35) | 18.5 ppb (18) | N/A | 19.0 ppb (18) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 35.0 | |
| Feb. 23, 2021, 9 p.m. | 39.0 ppb (37) | 20.1 ppb (19) | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 37.0 | |
| Feb. 23, 2021, 8 p.m. | 33.3 ppb (32) | 16.4 ppb (16) | N/A | 18.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 32.0 | |
| Feb. 23, 2021, 7 p.m. | 35.1 ppb (34) | 18.8 ppb (18) | N/A | 17.0 ppb (17) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 34.0 | |
| Feb. 23, 2021, 6 p.m. | 35.4 ppb (34) | 18.7 ppb (18) | N/A | 17.0 ppb (17) | N/A | 7.0 ppb (10) | N/A | N/A | N/A | N/A | 34.0 | |
| Feb. 23, 2021, 5 p.m. | 33.7 ppb (32) | 17.2 ppb (17) | N/A | 17.0 ppb (17) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 32.0 | |
| Feb. 23, 2021, 4 p.m. | 35.6 ppb (34) | 20.5 ppb (20) | N/A | 16.0 ppb (16) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 34.0 | |
| Feb. 23, 2021, 3 p.m. | 37.3 ppb (36) | 21.1 ppb (20) | N/A | 17.0 ppb (17) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 36.0 | |
| Feb. 23, 2021, 2 p.m. | 39.2 ppb (37) | 21.5 ppb (21) | N/A | 18.0 ppb (17) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 37.0 | |
| Feb. 23, 2021, 1 p.m. | 56.9 ppb (55) | 29.6 ppb (28) | N/A | 28.0 ppb (27) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 55.0 | |
| Feb. 23, 2021, noon | 68.7 ppb (67) | 35.4 ppb (34) | N/A | 34.0 ppb (33) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 67.0 | |
| Feb. 23, 2021, 11 a.m. | 27.6 ppb (27) | 9.2 ppb (9) | N/A | 19.0 ppb (18) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 27.0 | |
| Feb. 23, 2021, 10 a.m. | 24.5 ppb (24) | 10.1 ppb (10) | N/A | 15.0 ppb (15) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 24.0 | |
| Feb. 23, 2021, 9 a.m. | 14.8 ppb (14) | 5.7 ppb (6) | N/A | 10.0 ppb (10) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 23, 2021, 8 a.m. | 8.7 ppb (9) | 4.0 ppb (4) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 9.0 | |
| Feb. 23, 2021, 7 a.m. | 7.4 ppb (7) | 3.3 ppb (4) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 7.0 | |
| Feb. 23, 2021, 6 a.m. | 6.5 ppb (7) | 2.6 ppb (3) | N/A | 4.0 ppb (4) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 7.0 | |
| Feb. 23, 2021, 5 a.m. | 8.1 ppb (8) | 3.5 ppb (4) | N/A | 5.0 ppb (5) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 8.0 | |
| Feb. 23, 2021, 4 a.m. | 10.1 ppb (10) | 3.8 ppb (4) | N/A | 7.0 ppb (7) | N/A | 9.0 ppb (13) | N/A | N/A | N/A | N/A | 13.0 | |
| Feb. 23, 2021, 3 a.m. | 15.4 ppb (15) | 5.7 ppb (6) | N/A | 10.0 ppb (10) | N/A | 13.0 ppb (19) | N/A | N/A | N/A | N/A | 19.0 | |
| Feb. 23, 2021, 2 a.m. | 13.5 ppb (13) | 5.4 ppb (6) | N/A | 8.0 ppb (8) | N/A | 7.0 ppb (10) | N/A | N/A | N/A | N/A | 13.0 | |
| Feb. 23, 2021, 1 a.m. | 14.9 ppb (15) | 5.3 ppb (5) | N/A | 10.0 ppb (10) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | N/A | 15.0 | |
| Feb. 23, 2021, midnight | 20.5 ppb (20) | 7.4 ppb (7) | N/A | 14.0 ppb (14) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 20.0 | |
| Feb. 22, 2021, 11 p.m. | 23.1 ppb (22) | 9.8 ppb (10) | N/A | 14.0 ppb (14) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 22.0 | |
| Feb. 22, 2021, 10 p.m. | 26.3 ppb (25) | 13.2 ppb (13) | N/A | 14.0 ppb (14) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 25.0 | |
| Feb. 22, 2021, 9 p.m. | 29.6 ppb (28) | 14.8 ppb (14) | N/A | 16.0 ppb (16) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 28.0 | |
| Feb. 22, 2021, 8 p.m. | 26.4 ppb (25) | 14.2 ppb (14) | N/A | 13.0 ppb (13) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 25.0 | |
| Feb. 22, 2021, 7 p.m. | 23.5 ppb (23) | 12.5 ppb (12) | N/A | 12.0 ppb (12) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 23.0 | |
| Feb. 22, 2021, 6 p.m. | 24.8 ppb (24) | 14.0 ppb (14) | N/A | 11.0 ppb (11) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 24.0 | |
| Feb. 22, 2021, 5 p.m. | 30.6 ppb (29) | 17.9 ppb (17) | N/A | 13.0 ppb (13) | N/A | 9.0 ppb (13) | N/A | N/A | N/A | N/A | 29.0 | |
| Feb. 22, 2021, 4 p.m. | 27.6 ppb (27) | 15.3 ppb (15) | N/A | 13.0 ppb (13) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 27.0 | |
| Feb. 22, 2021, 3 p.m. | 29.2 ppb (28) | 15.8 ppb (15) | N/A | 14.0 ppb (14) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 28.0 | |
| Feb. 22, 2021, 2 p.m. | 37.0 ppb (35) | 19.1 ppb (19) | N/A | 19.0 ppb (18) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 35.0 | |
| Feb. 22, 2021, 1 p.m. | 32.4 ppb (31) | 14.7 ppb (14) | N/A | 18.0 ppb (17) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 31.0 | |
| Feb. 22, 2021, noon | 33.1 ppb (32) | 12.9 ppb (13) | N/A | 21.0 ppb (20) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 32.0 | |
| Feb. 22, 2021, 11 a.m. | 19.5 ppb (19) | 6.5 ppb (7) | N/A | 13.0 ppb (13) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 19.0 | |
| Feb. 22, 2021, 10 a.m. | 11.7 ppb (12) | 3.2 ppb (4) | N/A | 9.0 ppb (9) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 12.0 | |
| Feb. 22, 2021, 9 a.m. | 9.2 ppb (9) | 2.5 ppb (3) | N/A | 7.0 ppb (7) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 9.0 | |
| Feb. 22, 2021, 8 a.m. | 8.1 ppb (8) | 2.0 ppb (2) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 8.0 | |
| Feb. 22, 2021, 7 a.m. | 7.9 ppb (8) | 2.1 ppb (2) | N/A | 6.0 ppb (6) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 8.0 | |
| Feb. 22, 2021, 6 a.m. | 9.5 ppb (9) | 2.9 ppb (3) | N/A | 7.0 ppb (7) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 9.0 | |
| Feb. 22, 2021, 5 a.m. | 10.4 ppb (10) | 3.3 ppb (4) | N/A | 7.0 ppb (7) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 10.0 | |
| Feb. 22, 2021, 4 a.m. | 10.9 ppb (11) | 4.1 ppb (4) | N/A | 7.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 22, 2021, 3 a.m. | 10.1 ppb (10) | 3.3 ppb (4) | N/A | 7.0 ppb (7) | N/A | 1.0 ppb (2) | N/A | N/A | N/A | N/A | 10.0 | |
| Feb. 22, 2021, 2 a.m. | 11.0 ppb (11) | 4.2 ppb (4) | N/A | 7.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 22, 2021, 1 a.m. | 12.1 ppb (12) | 3.6 ppb (4) | N/A | 9.0 ppb (9) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 12.0 | |
| Feb. 22, 2021, midnight | 12.5 ppb (12) | 4.9 ppb (5) | N/A | 8.0 ppb (8) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 12.0 | |
| Feb. 21, 2021, 11 p.m. | 10.9 ppb (11) | 4.7 ppb (5) | N/A | 7.0 ppb (7) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 21, 2021, 10 p.m. | 11.1 ppb (11) | 4.8 ppb (5) | N/A | 7.0 ppb (7) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 11.0 | |
| Feb. 21, 2021, 9 p.m. | 13.5 ppb (13) | 5.9 ppb (6) | N/A | 8.0 ppb (8) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 13.0 | |
| Feb. 21, 2021, 8 p.m. | 19.1 ppb (19) | 8.0 ppb (8) | N/A | 12.0 ppb (12) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 19.0 | |
| Feb. 21, 2021, 7 p.m. | 16.2 ppb (16) | 6.5 ppb (7) | N/A | 10.0 ppb (10) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 16.0 | |
| Feb. 21, 2021, 6 p.m. | 13.5 ppb (13) | 5.9 ppb (6) | N/A | 8.0 ppb (8) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 13.0 | |
| Feb. 21, 2021, 5 p.m. | 13.4 ppb (13) | 5.9 ppb (6) | N/A | 8.0 ppb (8) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 13.0 | |
| Feb. 21, 2021, 4 p.m. | 17.7 ppb (17) | 7.7 ppb (8) | N/A | 11.0 ppb (11) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 17.0 | |
| Feb. 21, 2021, 3 p.m. | 20.7 ppb (20) | 8.6 ppb (9) | N/A | 13.0 ppb (13) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 20.0 | |
| Feb. 21, 2021, 2 p.m. | 21.6 ppb (21) | 7.7 ppb (8) | N/A | 14.0 ppb (14) | N/A | 6.0 ppb (9) | N/A | N/A | N/A | N/A | 21.0 | |
| Feb. 21, 2021, 1 p.m. | 22.0 ppb (21) | 5.2 ppb (5) | N/A | 17.0 ppb (17) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 21.0 | |
| Feb. 21, 2021, noon | 20.7 ppb (20) | 3.9 ppb (4) | N/A | 17.0 ppb (17) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 20.0 | |
| Feb. 21, 2021, 11 a.m. | 16.5 ppb (16) | 2.3 ppb (3) | N/A | 15.0 ppb (15) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 16.0 | |
| Feb. 21, 2021, 10 a.m. | 14.5 ppb (14) | 1.9 ppb (2) | N/A | 13.0 ppb (13) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 21, 2021, 9 a.m. | 13.8 ppb (14) | 2.3 ppb (3) | N/A | 12.0 ppb (12) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 21, 2021, 8 a.m. | 14.2 ppb (14) | 2.5 ppb (3) | N/A | 12.0 ppb (12) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 14.0 | |
| Feb. 21, 2021, 7 a.m. | 15.0 ppb (15) | 2.6 ppb (3) | N/A | 13.0 ppb (13) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 15.0 | |
| Feb. 21, 2021, 6 a.m. | 18.2 ppb (18) | 3.2 ppb (4) | N/A | 16.0 ppb (16) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 18.0 | |
| Feb. 21, 2021, 5 a.m. | 18.2 ppb (18) | 3.5 ppb (4) | N/A | 15.0 ppb (15) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 18.0 | |
| Feb. 21, 2021, 4 a.m. | 17.3 ppb (17) | 4.1 ppb (4) | N/A | 14.0 ppb (14) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 17.0 | |
| Feb. 21, 2021, 3 a.m. | 15.4 ppb (15) | 4.3 ppb (5) | N/A | 12.0 ppb (12) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 15.0 | |
| Feb. 21, 2021, 2 a.m. | 14.9 ppb (15) | 4.1 ppb (4) | N/A | 11.0 ppb (11) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 15.0 | |
| Feb. 21, 2021, 1 a.m. | 21.0 ppb (20) | 6.2 ppb (6) | N/A | 15.0 ppb (15) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 20.0 | |
| Feb. 21, 2021, midnight | 30.0 ppb (29) | 8.5 ppb (9) | N/A | 22.0 ppb (21) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 29.0 | |
| Feb. 20, 2021, 11 p.m. | 31.8 ppb (30) | 9.7 ppb (10) | N/A | 23.0 ppb (22) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 30.0 | |
| Feb. 20, 2021, 10 p.m. | 28.9 ppb (28) | 8.3 ppb (8) | N/A | 21.0 ppb (20) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 28.0 | |
| Feb. 20, 2021, 9 p.m. | 24.3 ppb (23) | 8.6 ppb (9) | N/A | 16.0 ppb (16) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 23.0 | |
| Feb. 20, 2021, 8 p.m. | 30.2 ppb (29) | 13.2 ppb (13) | N/A | 18.0 ppb (17) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 29.0 | |
| Feb. 20, 2021, 7 p.m. | 30.3 ppb (29) | 14.2 ppb (14) | N/A | 17.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 29.0 | |
| Feb. 20, 2021, 6 p.m. | 29.5 ppb (28) | 14.3 ppb (14) | N/A | 16.0 ppb (16) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 28.0 | |
| Feb. 20, 2021, 5 p.m. | 31.2 ppb (30) | 15.0 ppb (15) | N/A | 17.0 ppb (17) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 30.0 | |
| Feb. 20, 2021, 4 p.m. | 38.8 ppb (37) | 19.0 ppb (18) | N/A | 20.0 ppb (19) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 37.0 | |
| Feb. 20, 2021, 3 p.m. | 54.4 ppb (52) | 29.0 ppb (28) | N/A | 26.0 ppb (25) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 52.0 | |
| Feb. 20, 2021, 2 p.m. | 64.8 ppb (63) | 32.8 ppb (31) | N/A | 33.0 ppb (32) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 63.0 | |
| Feb. 20, 2021, 1 p.m. | 82.6 ppb (82) | 39.0 ppb (37) | N/A | 45.0 ppb (43) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 82.0 | |
| Feb. 20, 2021, noon | 74.5 ppb (73) | 25.0 ppb (24) | N/A | 50.0 ppb (48) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 73.0 | |
| Feb. 20, 2021, 11 a.m. | 59.5 ppb (57) | 15.9 ppb (15) | N/A | 44.0 ppb (42) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 57.0 | |
| Feb. 20, 2021, 10 a.m. | 46.6 ppb (44) | 8.6 ppb (9) | N/A | 39.0 ppb (37) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 44.0 | |
| Feb. 20, 2021, 9 a.m. | 47.7 ppb (45) | 8.1 ppb (8) | N/A | 40.0 ppb (38) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 45.0 | |
| Feb. 20, 2021, 8 a.m. | 56.7 ppb (54) | 14.0 ppb (14) | N/A | 43.0 ppb (41) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 54.0 | |
| Feb. 20, 2021, 7 a.m. | 62.4 ppb (60) | 16.1 ppb (16) | N/A | 47.0 ppb (45) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 60.0 | |
| Feb. 20, 2021, 6 a.m. | 50.2 ppb (48) | 8.5 ppb (9) | N/A | 42.0 ppb (40) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 48.0 | |
| Feb. 20, 2021, 5 a.m. | 34.9 ppb (33) | 4.1 ppb (4) | N/A | 31.0 ppb (30) | N/A | 3.0 ppb (5) | N/A | N/A | N/A | N/A | 33.0 | |
| Feb. 20, 2021, 4 a.m. | 29.1 ppb (28) | 5.3 ppb (5) | N/A | 24.0 ppb (23) | N/A | 4.0 ppb (6) | N/A | N/A | N/A | N/A | 28.0 | |
| Feb. 20, 2021, 3 a.m. | 28.2 ppb (27) | 7.1 ppb (7) | N/A | 22.0 ppb (21) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 27.0 | |
| Feb. 20, 2021, 2 a.m. | 44.9 ppb (43) | 12.9 ppb (13) | N/A | 33.0 ppb (32) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 43.0 | |
| Feb. 20, 2021, 1 a.m. | 61.3 ppb (59) | 21.1 ppb (20) | N/A | 41.0 ppb (39) | N/A | 8.0 ppb (12) | N/A | N/A | N/A | N/A | 59.0 | |
| Feb. 20, 2021, midnight | 53.0 ppb (50) | 19.4 ppb (19) | N/A | 35.0 ppb (34) | N/A | 7.0 ppb (10) | N/A | N/A | N/A | N/A | 50.0 | |
| Feb. 19, 2021, 11 p.m. | 40.9 ppb (39) | 16.1 ppb (16) | N/A | 25.0 ppb (24) | N/A | 5.0 ppb (8) | N/A | N/A | N/A | N/A | 39.0 | |
| Feb. 19, 2021, 10 p.m. | 32.6 ppb (31) | 15.3 ppb (15) | N/A | 18.0 ppb (17) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 31.0 | |
| Feb. 19, 2021, 9 p.m. | 30.0 ppb (29) | 15.9 ppb (15) | N/A | 15.0 ppb (15) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 29.0 | |
| Feb. 19, 2021, 8 p.m. | 28.5 ppb (27) | 15.2 ppb (15) | N/A | 14.0 ppb (14) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 27.0 | |
| Feb. 19, 2021, 7 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 | |
| Feb. 19, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| Feb. 19, 2021, 5 p.m. | 45.7 ppb (44) | 26.6 ppb (26) | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 44.0 | |
| Feb. 19, 2021, 4 p.m. | 44.9 ppb (43) | 25.2 ppb (24) | N/A | 20.0 ppb (19) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 43.0 | |
| Feb. 19, 2021, 3 p.m. | 61.2 ppb (59) | 36.7 ppb (35) | N/A | 25.0 ppb (24) | N/A | 2.0 ppb (3) | N/A | N/A | N/A | N/A | 59.0 |