Morrisville (Dan K Moore Fwy) NC, US: 35.8652, -78.8197
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 29, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 14.0 μg/m3 (54) | 54.0 | |
| March 29, 2020, 5 a.m. | 3.9 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.21 ppb (2) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| March 29, 2020, 4 a.m. | 7.5 ppb (7) | 1.3 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 20.0 μg/m3 (67) | 67.0 | |
| March 29, 2020, 3 a.m. | 13.9 ppb (13) | 3.8 ppb (4) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 27.0 μg/m3 (82) | 82.0 | |
| March 29, 2020, 2 a.m. | 12.6 ppb (12) | 2.1 ppb (2) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 29, 2020, 1 a.m. | 14.6 ppb (14) | 3.3 ppb (3) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 29, 2020, midnight | 15.1 ppb (14) | 3.4 ppb (3) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| March 28, 2020, 11 p.m. | 14.5 ppb (13) | 4.3 ppb (4) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 10 p.m. | 10.8 ppb (10) | 4.1 ppb (4) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 28, 2020, 9 p.m. | 9.7 ppb (9) | 4.2 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 28, 2020, 8 p.m. | 10.4 ppb (10) | 4.8 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| March 28, 2020, 7 p.m. | 8.6 ppb (8) | 4.0 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 6 p.m. | 9.8 ppb (9) | 4.9 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 28, 2020, 5 p.m. | 8.7 ppb (8) | 4.4 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| March 28, 2020, 4 p.m. | 8.8 ppb (8) | 4.9 ppb (5) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 24.0 μg/m3 (76) | 76.0 | |
| March 28, 2020, 3 p.m. | 9.7 ppb (9) | 5.4 ppb (5) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 2 p.m. | 10.1 ppb (9) | 5.5 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 1 p.m. | 11.1 ppb (10) | 6.0 ppb (6) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| March 28, 2020, noon | 22.0 ppb (20) | 12.3 ppb (11) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 28, 2020, 11 a.m. | 29.9 ppb (28) | 17.8 ppb (16) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 10 a.m. | 27.2 ppb (25) | 17.0 ppb (16) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| March 28, 2020, 9 a.m. | 4.5 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 28, 2020, 8 a.m. | 7.1 ppb (7) | 1.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 7 a.m. | 4.7 ppb (4) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 28, 2020, 5 a.m. | 3.1 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| March 28, 2020, 4 a.m. | 4.3 ppb (4) | 0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 28, 2020, 3 a.m. | 11.8 ppb (11) | 4.0 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 23.0 μg/m3 (73) | 73.0 | |
| March 28, 2020, 2 a.m. | 9.9 ppb (9) | 1.4 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| March 28, 2020, 1 a.m. | 24.3 ppb (23) | 4.5 ppb (4) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 28, 2020, midnight | 22.7 ppb (21) | 4.3 ppb (4) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| March 27, 2020, 11 p.m. | 11.9 ppb (11) | 2.6 ppb (2) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.28 ppb (3) | N/A | 14.0 μg/m3 (54) | 54.0 | |
| March 27, 2020, 10 p.m. | 25.4 ppb (24) | 8.8 ppb (8) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 27, 2020, 9 p.m. | 20.4 ppb (19) | 8.7 ppb (8) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 27, 2020, 8 p.m. | 19.8 ppb (18) | 9.0 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 27, 2020, 7 p.m. | 26.7 ppb (25) | 14.1 ppb (13) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 27, 2020, 6 p.m. | 29.1 ppb (27) | 16.7 ppb (15) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 5 p.m. | 30.0 ppb (28) | 17.6 ppb (16) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 4 p.m. | 32.0 ppb (30) | 20.2 ppb (19) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 3 p.m. | 32.0 ppb (30) | 20.5 ppb (19) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 2 p.m. | 28.6 ppb (26) | 17.8 ppb (16) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 1 p.m. | 29.3 ppb (27) | 15.9 ppb (15) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, noon | 26.1 ppb (24) | 16.8 ppb (16) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 11 a.m. | 29.3 ppb (27) | 18.8 ppb (17) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 10 a.m. | 27.6 ppb (26) | 16.1 ppb (15) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 27, 2020, 9 a.m. | 17.1 ppb (16) | 9.2 ppb (9) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 8 a.m. | 15.9 ppb (15) | 9.1 ppb (8) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 7 a.m. | 6.5 ppb (6) | 2.6 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 5 a.m. | 5.1 ppb (5) | 1.9 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 4 a.m. | 17.4 ppb (16) | 7.1 ppb (7) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 27, 2020, 3 a.m. | 25.6 ppb (24) | 9.8 ppb (9) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 27, 2020, 2 a.m. | 24.9 ppb (23) | 10.0 ppb (9) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 1 a.m. | 22.2 ppb (21) | 7.9 ppb (7) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, midnight | 17.7 ppb (16) | 5.5 ppb (5) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 2.0 μg/m3 (8) | 16.0 | |
| March 26, 2020, 11 p.m. | 20.1 ppb (19) | 5.9 ppb (5) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 26, 2020, 10 p.m. | 25.1 ppb (23) | 13.6 ppb (13) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 26, 2020, 9 p.m. | 20.7 ppb (19) | 12.9 ppb (12) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 26, 2020, 8 p.m. | 25.2 ppb (23) | 14.7 ppb (14) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 5.0 μg/m3 (21) | 23.0 | |
| March 26, 2020, 7 p.m. | 25.7 ppb (24) | 14.2 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 26, 2020, 6 p.m. | 18.2 ppb (17) | 9.4 ppb (9) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 2.0 μg/m3 (8) | 17.0 | |
| March 26, 2020, 5 p.m. | 26.1 ppb (24) | 15.6 ppb (14) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 24.0 | |
| March 26, 2020, 4 p.m. | 35.9 ppb (33) | 21.2 ppb (20) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 2.0 μg/m3 (8) | 33.0 | |
| March 26, 2020, 3 p.m. | 36.6 ppb (34) | 21.8 ppb (20) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 2.0 μg/m3 (8) | 34.0 | |
| March 26, 2020, 2 p.m. | 25.4 ppb (24) | 13.9 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 2.0 μg/m3 (8) | 24.0 | |
| March 26, 2020, 1 p.m. | 19.7 ppb (18) | 9.9 ppb (9) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | -1.0 μg/m3 (0) | 18.0 | |
| March 26, 2020, noon | 12.7 ppb (12) | 5.4 ppb (5) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.21 ppb (2) | N/A | -1.0 μg/m3 (0) | 12.0 | |
| March 26, 2020, 11 a.m. | 9.2 ppb (9) | 3.5 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | -1.0 μg/m3 (0) | 9.0 | |
| March 26, 2020, 10 a.m. | 7.7 ppb (7) | 2.8 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 26, 2020, 9 a.m. | 5.5 ppb (5) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 1.0 μg/m3 (4) | 5.0 | |
| March 26, 2020, 8 a.m. | 2.2 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 7 a.m. | 5.0 ppb (5) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 5.0 | |
| March 26, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.15 ppb (2) | N/A | -1.0 μg/m3 (0) | 2.0 | |
| March 26, 2020, 5 a.m. | 1.9 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 26, 2020, 4 a.m. | 2.8 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 3 a.m. | 1.4 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 26, 2020, 2 a.m. | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | -1.0 μg/m3 (0) | 3.0 | |
| March 26, 2020, 1 a.m. | 2.2 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 26, 2020, midnight | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 25, 2020, 11 p.m. | 1.2 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 25, 2020, 10 p.m. | 2.7 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 0.0 μg/m3 (0) | 3.0 | |
| March 25, 2020, 9 p.m. | 4.9 ppb (5) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 25, 2020, 8 p.m. | 3.9 ppb (4) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | -3.0 μg/m3 (0) | 4.0 | |
| March 25, 2020, 7 p.m. | 5.0 ppb (5) | 2.3 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 1.0 μg/m3 (4) | 5.0 | |
| March 25, 2020, 6 p.m. | 5.7 ppb (5) | 2.8 ppb (3) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 1.0 μg/m3 (4) | 5.0 | |
| March 25, 2020, 5 p.m. | 4.6 ppb (4) | 2.4 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 25, 2020, 4 p.m. | 3.2 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | -2.0 μg/m3 (0) | 3.0 | |
| March 25, 2020, 3 p.m. | 10.1 ppb (9) | 5.2 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 0.0 μg/m3 (0) | 9.0 | |
| March 25, 2020, 2 p.m. | 8.4 ppb (8) | 4.0 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.21 ppb (2) | N/A | 1.0 μg/m3 (4) | 8.0 | |
| March 25, 2020, 1 p.m. | 7.7 ppb (7) | 3.0 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | -1.0 μg/m3 (0) | 7.0 | |
| March 25, 2020, noon | 5.8 ppb (5) | 1.8 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | -2.0 μg/m3 (0) | 5.0 | |
| March 25, 2020, 11 a.m. | 7.2 ppb (7) | 2.8 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 1.0 μg/m3 (4) | 7.0 | |
| March 25, 2020, 10 a.m. | 6.8 ppb (6) | 2.9 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 1.0 μg/m3 (4) | 6.0 | |
| March 25, 2020, 9 a.m. | 4.3 ppb (4) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 25, 2020, 8 a.m. | 3.7 ppb (3) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 25, 2020, 7 a.m. | 3.4 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 25, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 25, 2020, 5 a.m. | 2.7 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 25, 2020, 4 a.m. | 5.1 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 25, 2020, 3 a.m. | 6.9 ppb (6) | 3.1 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 25, 2020, 2 a.m. | 4.1 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.21 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 25, 2020, 1 a.m. | 9.0 ppb (8) | 2.9 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 25, 2020, midnight | 8.8 ppb (8) | 3.0 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 11 p.m. | 12.2 ppb (11) | 3.9 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2020, 10 p.m. | 12.8 ppb (12) | 5.5 ppb (5) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, 9 p.m. | 6.0 ppb (6) | 1.9 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 24, 2020, 8 p.m. | 9.8 ppb (9) | 4.6 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 7 p.m. | 7.5 ppb (7) | 2.8 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2020, 6 p.m. | 7.8 ppb (7) | 3.8 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 24, 2020, 5 p.m. | 10.8 ppb (10) | 5.7 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 4 p.m. | 11.7 ppb (11) | 6.8 ppb (6) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, 3 p.m. | 12.0 ppb (11) | 6.9 ppb (6) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 2 p.m. | 13.2 ppb (12) | 8.1 ppb (8) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2020, 1 p.m. | 9.6 ppb (9) | 5.2 ppb (5) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2020, noon | 11.0 ppb (10) | 5.2 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 11 a.m. | 11.8 ppb (11) | 6.2 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 24, 2020, 10 a.m. | 12.9 ppb (12) | 6.9 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.28 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 9 a.m. | 10.0 ppb (9) | 4.9 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 24, 2020, 8 a.m. | 18.1 ppb (17) | 8.7 ppb (8) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 24, 2020, 7 a.m. | 8.8 ppb (8) | 2.8 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 24, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 5 a.m. | 4.9 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2020, 4 a.m. | 9.5 ppb (9) | 4.6 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, 3 a.m. | 12.4 ppb (11) | 6.1 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 24, 2020, 2 a.m. | 11.3 ppb (10) | 5.8 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 24, 2020, 1 a.m. | 13.3 ppb (12) | 7.1 ppb (7) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2020, midnight | 14.9 ppb (14) | 7.0 ppb (6) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.28 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 23, 2020, 11 p.m. | 18.6 ppb (17) | 10.1 ppb (9) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 1.0 μg/m3 (4) | 17.0 | |
| March 23, 2020, 10 p.m. | 24.1 ppb (22) | 14.4 ppb (13) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 23, 2020, 9 p.m. | 27.0 ppb (25) | 14.8 ppb (14) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 3.0 μg/m3 (12) | 25.0 | |
| March 23, 2020, 8 p.m. | 30.4 ppb (28) | 17.9 ppb (17) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | 2.0 μg/m3 (8) | 28.0 | |
| March 23, 2020, 7 p.m. | 32.0 ppb (30) | 19.1 ppb (18) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 1.0 μg/m3 (4) | 30.0 | |
| March 23, 2020, 6 p.m. | 31.3 ppb (29) | 18.4 ppb (17) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 2.0 μg/m3 (8) | 29.0 | |
| March 23, 2020, 5 p.m. | 34.3 ppb (32) | 18.4 ppb (17) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 2.0 μg/m3 (8) | 32.0 | |
| March 23, 2020, 4 p.m. | 26.7 ppb (25) | 14.1 ppb (13) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 2.0 μg/m3 (8) | 25.0 | |
| March 23, 2020, 3 p.m. | 31.7 ppb (29) | 17.9 ppb (17) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 3.0 μg/m3 (12) | 29.0 | |
| March 23, 2020, 2 p.m. | 11.5 ppb (11) | 5.5 ppb (5) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2020, 1 p.m. | 9.7 ppb (9) | 3.7 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 0.0 μg/m3 (0) | 9.0 | |
| March 23, 2020, noon | 11.1 ppb (10) | 3.5 ppb (3) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 0.0 μg/m3 (0) | 10.0 | |
| March 23, 2020, 11 a.m. | 9.3 ppb (9) | 2.9 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | -2.0 μg/m3 (0) | 9.0 | |
| March 23, 2020, 10 a.m. | 5.7 ppb (5) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 23, 2020, 9 a.m. | 2.1 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 23, 2020, 8 a.m. | 1.1 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 23, 2020, 7 a.m. | 1.8 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 23, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 23, 2020, 5 a.m. | 0.6 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 23, 2020, 4 a.m. | 0.7 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 23, 2020, 3 a.m. | 0.9 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 23, 2020, 2 a.m. | 1.3 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 23, 2020, 1 a.m. | 1.8 ppb (2) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | N/A | 2.0 | |
| March 23, 2020, midnight | 3.3 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | N/A | 3.0 | |
| March 22, 2020, 11 p.m. | 2.0 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 10 p.m. | 2.2 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 9 p.m. | 2.4 ppb (2) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 8 p.m. | 2.6 ppb (2) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 7 p.m. | 2.0 ppb (2) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 6 p.m. | 1.9 ppb (2) | 0.9 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 5 p.m. | 1.4 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 4 p.m. | 1.6 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 3 p.m. | 1.8 ppb (2) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 2 p.m. | 2.0 ppb (2) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 1 p.m. | 1.3 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, noon | 1.5 ppb (1) | 0.6 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 11 a.m. | 1.2 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 10 a.m. | 0.6 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 9 a.m. | 0.5 ppb (0) | 0.0 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 8 a.m. | 0.6 ppb (1) | 0.1 ppb (0) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | N/A | 2.0 | |
| March 22, 2020, 7 a.m. | 0.6 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 |