Steubenville (Pleasant Heights) OH, US: 40.366452, -80.615691
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 10, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | N/A | N/A | N/A | 12.4 μg/m3 (52) | 52.0 | |
| April 10, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 2.0 ppb (2) | N/A | N/A | 11.5 μg/m3 (48) | 48.0 | |
| April 10, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 2.0 ppb (2) | N/A | N/A | 11.4 μg/m3 (48) | 48.0 | |
| April 10, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 2.0 ppb (2) | N/A | N/A | 11.8 μg/m3 (50) | 50.0 | |
| April 10, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 3.0 ppb (3) | N/A | N/A | 10.8 μg/m3 (46) | 46.0 | |
| April 10, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 8.0 ppb (8) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| April 10, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 6.0 ppb (6) | N/A | N/A | 12.4 μg/m3 (52) | 52.0 | |
| April 10, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | N/A | 13.4 μg/m3 (54) | 54.0 | |
| April 10, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | 14.0 ppb (13) | N/A | N/A | 13.9 μg/m3 (55) | 55.0 | |
| April 10, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 21.0 ppb (20) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 10, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 37.0 ppb (35) | N/A | N/A | 5.7 μg/m3 (24) | 35.0 | |
| April 9, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 45.0 ppb (42) | N/A | N/A | 5.2 μg/m3 (22) | 42.0 | |
| April 9, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 52.0 ppb (49) | N/A | N/A | 4.7 μg/m3 (20) | 49.0 | |
| April 9, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 54.0 ppb (50) | N/A | N/A | 4.3 μg/m3 (18) | 50.0 | |
| April 9, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 53.0 ppb (50) | N/A | N/A | 4.3 μg/m3 (18) | 50.0 | |
| April 9, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 53.0 ppb (50) | N/A | N/A | 4.3 μg/m3 (18) | 50.0 | |
| April 9, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 5.2 μg/m3 (22) | 47.0 | |
| April 9, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 49.0 ppb (46) | N/A | N/A | 6.9 μg/m3 (29) | 46.0 | |
| April 9, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (19) | 43.0 ppb (40) | N/A | N/A | 9.1 μg/m3 (38) | 40.0 | |
| April 9, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (18) | 39.0 ppb (37) | N/A | N/A | 10.3 μg/m3 (43) | 43.0 | |
| April 9, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 37.0 ppb (35) | N/A | N/A | 10.4 μg/m3 (44) | 44.0 | |
| April 9, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 38.0 ppb (36) | N/A | N/A | 10.7 μg/m3 (45) | 45.0 | |
| April 9, 2021, noon | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 32.0 ppb (30) | N/A | N/A | 13.8 μg/m3 (55) | 55.0 | |
| April 9, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 26.0 ppb (25) | N/A | N/A | 17.5 μg/m3 (63) | 63.0 | |
| April 9, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | N/A | N/A | N/A | 17.1 μg/m3 (62) | 62.0 | |
| April 9, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 32.0 ppb (30) | N/A | N/A | 20.4 μg/m3 (69) | 69.0 | |
| April 9, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 32.0 ppb (30) | N/A | N/A | 20.4 μg/m3 (69) | 69.0 | |
| April 9, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 34.0 ppb (32) | N/A | N/A | 17.9 μg/m3 (64) | 64.0 | |
| April 9, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 41.0 ppb (38) | N/A | N/A | 16.5 μg/m3 (61) | 61.0 | |
| April 9, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 45.0 ppb (42) | N/A | N/A | 18.2 μg/m3 (64) | 64.0 | |
| April 9, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 43.0 ppb (40) | N/A | N/A | 18.8 μg/m3 (66) | 66.0 | |
| April 9, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | N/A | 15.6 μg/m3 (59) | 59.0 | |
| April 9, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 50.0 ppb (47) | N/A | N/A | 12.5 μg/m3 (52) | 52.0 | |
| April 9, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 46.0 ppb (43) | N/A | N/A | 16.9 μg/m3 (62) | 62.0 | |
| April 9, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 19.3 μg/m3 (67) | 67.0 | |
| April 8, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 19.5 μg/m3 (67) | 67.0 | |
| April 8, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 59.0 ppb (65) | N/A | N/A | 18.1 μg/m3 (64) | 65.0 | |
| April 8, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 64.0 ppb (81) | N/A | N/A | 19.0 μg/m3 (66) | 81.0 | |
| April 8, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 65.0 ppb (84) | N/A | N/A | 19.7 μg/m3 (67) | 84.0 | |
| April 8, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 64.0 ppb (81) | N/A | N/A | 17.8 μg/m3 (63) | 81.0 | |
| April 8, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 62.0 ppb (74) | N/A | N/A | 20.2 μg/m3 (69) | 74.0 | |
| April 8, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 63.0 ppb (78) | N/A | N/A | 21.9 μg/m3 (72) | 78.0 | |
| April 8, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 61.0 ppb (71) | N/A | N/A | 22.2 μg/m3 (73) | 73.0 | |
| April 8, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | N/A | 20.8 μg/m3 (70) | 70.0 | |
| April 8, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (12) | N/A | N/A | N/A | 30.5 μg/m3 (90) | 90.0 | |
| April 8, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 11.0 ppb (11) | N/A | N/A | 37.8 μg/m3 (107) | 107.0 | |
| April 8, 2021, noon | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 5.0 ppb (5) | N/A | N/A | 34.0 μg/m3 (98) | 98.0 | |
| April 8, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 2.0 ppb (2) | N/A | N/A | 27.5 μg/m3 (84) | 84.0 | |
| April 8, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (12) | N/A | N/A | N/A | 27.1 μg/m3 (83) | 83.0 | |
| April 8, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (15) | 2.0 ppb (2) | N/A | N/A | 29.6 μg/m3 (88) | 88.0 | |
| April 8, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | 2.0 ppb (2) | N/A | N/A | 29.3 μg/m3 (88) | 88.0 | |
| April 8, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 6.0 ppb (6) | N/A | N/A | 33.0 μg/m3 (95) | 95.0 | |
| April 8, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 12.0 ppb (12) | N/A | N/A | 29.4 μg/m3 (88) | 88.0 | |
| April 8, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 14.0 ppb (13) | N/A | N/A | 25.4 μg/m3 (79) | 79.0 | |
| April 8, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | 13.0 ppb (13) | N/A | N/A | 25.3 μg/m3 (79) | 79.0 | |
| April 8, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | N/A | 27.0 μg/m3 (83) | 83.0 | |
| April 8, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 18.0 ppb (17) | N/A | N/A | 24.6 μg/m3 (78) | 78.0 | |
| April 8, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 36.0 ppb (34) | N/A | N/A | 22.8 μg/m3 (74) | 74.0 | |
| April 8, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 48.0 ppb (45) | N/A | N/A | 20.4 μg/m3 (69) | 69.0 | |
| April 7, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 57.0 ppb (58) | N/A | N/A | 19.5 μg/m3 (67) | 67.0 | |
| April 7, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 63.0 ppb (78) | N/A | N/A | 18.7 μg/m3 (65) | 78.0 | |
| April 7, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 63.0 ppb (78) | N/A | N/A | 19.0 μg/m3 (66) | 78.0 | |
| April 7, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 63.0 ppb (78) | N/A | N/A | 20.3 μg/m3 (69) | 78.0 | |
| April 7, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 60.0 ppb (68) | N/A | N/A | 19.9 μg/m3 (68) | 68.0 | |
| April 7, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 59.0 ppb (65) | N/A | N/A | 20.3 μg/m3 (69) | 69.0 | |
| April 7, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 58.0 ppb (61) | N/A | N/A | 22.9 μg/m3 (74) | 74.0 | |
| April 7, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (8) | 56.0 ppb (55) | N/A | N/A | 22.9 μg/m3 (74) | 74.0 | |
| April 7, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (32) | 36.0 ppb (34) | N/A | N/A | 26.3 μg/m3 (81) | 81.0 | |
| April 7, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (51) | 12.0 ppb (12) | N/A | N/A | 38.5 μg/m3 (109) | 109.0 | |
| April 7, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (53) | 7.0 ppb (7) | N/A | N/A | 40.7 μg/m3 (114) | 114.0 | |
| April 7, 2021, noon | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (22) | 5.0 ppb (5) | N/A | N/A | 31.4 μg/m3 (92) | 92.0 | |
| April 7, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (18) | 3.0 ppb (3) | N/A | N/A | 21.9 μg/m3 (72) | 72.0 | |
| April 7, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | N/A | N/A | N/A | 20.4 μg/m3 (69) | 69.0 | |
| April 7, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (10) | 7.0 ppb (7) | N/A | N/A | 20.9 μg/m3 (70) | 70.0 | |
| April 7, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (19) | 8.0 ppb (8) | N/A | N/A | 23.2 μg/m3 (75) | 75.0 | |
| April 7, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (20) | 12.0 ppb (12) | N/A | N/A | 25.1 μg/m3 (79) | 79.0 | |
| April 7, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (23) | 14.0 ppb (13) | N/A | N/A | 25.5 μg/m3 (80) | 80.0 | |
| April 7, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (38) | 14.0 ppb (13) | N/A | N/A | 29.9 μg/m3 (89) | 89.0 | |
| April 7, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (25) | 16.0 ppb (15) | N/A | N/A | 26.6 μg/m3 (82) | 82.0 | |
| April 7, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | N/A | N/A | 22.4 μg/m3 (73) | 73.0 | |
| April 7, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 23.0 ppb (22) | N/A | N/A | 19.1 μg/m3 (66) | 66.0 | |
| April 7, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 33.0 ppb (31) | N/A | N/A | 16.5 μg/m3 (61) | 61.0 | |
| April 7, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 43.0 ppb (40) | N/A | N/A | 14.2 μg/m3 (56) | 56.0 | |
| April 6, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 60.0 ppb (68) | N/A | N/A | 14.1 μg/m3 (56) | 68.0 | |
| April 6, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 67.0 ppb (91) | N/A | N/A | 14.3 μg/m3 (56) | 91.0 | |
| April 6, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 68.0 ppb (94) | N/A | N/A | 16.6 μg/m3 (61) | 94.0 | |
| April 6, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 70.0 ppb (100) | N/A | N/A | 19.3 μg/m3 (67) | 100.0 | |
| April 6, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 ppb (101) | N/A | N/A | 20.9 μg/m3 (70) | 101.0 | |
| April 6, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 68.0 ppb (94) | N/A | N/A | 18.8 μg/m3 (66) | 94.0 | |
| April 6, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 ppb (91) | N/A | N/A | 20.2 μg/m3 (69) | 91.0 | |
| April 6, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (18) | 56.0 ppb (55) | N/A | N/A | 23.2 μg/m3 (75) | 75.0 | |
| April 6, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (35) | 31.0 ppb (29) | N/A | N/A | 30.5 μg/m3 (90) | 90.0 | |
| April 6, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (78) | 12.0 ppb (12) | N/A | N/A | 46.5 μg/m3 (129) | 129.0 | |
| April 6, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 70.0 ppb (94) | 7.0 ppb (7) | N/A | N/A | 44.1 μg/m3 (123) | 123.0 | |
| April 6, 2021, noon | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (18) | 7.0 ppb (7) | N/A | N/A | 37.6 μg/m3 (107) | 107.0 | |
| April 6, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 3.0 ppb (3) | N/A | N/A | 27.2 μg/m3 (83) | 83.0 | |
| April 6, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 24.7 μg/m3 (78) | 78.0 | |
| April 6, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 3.0 ppb (3) | N/A | N/A | 24.1 μg/m3 (77) | 77.0 | |
| April 6, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 4.0 ppb (4) | N/A | N/A | 25.4 μg/m3 (79) | 79.0 | |
| April 6, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 4.0 ppb (4) | N/A | N/A | 26.9 μg/m3 (83) | 83.0 | |
| April 6, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 7.0 ppb (7) | N/A | N/A | 28.3 μg/m3 (86) | 86.0 | |
| April 6, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 17.0 ppb (16) | N/A | N/A | 26.0 μg/m3 (81) | 81.0 | |
| April 6, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 18.0 ppb (17) | N/A | N/A | 28.4 μg/m3 (86) | 86.0 | |
| April 6, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | N/A | 24.9 μg/m3 (78) | 78.0 | |
| April 6, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 48.0 ppb (45) | N/A | N/A | 21.9 μg/m3 (72) | 72.0 | |
| April 6, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 51.0 ppb (48) | N/A | N/A | 21.6 μg/m3 (71) | 71.0 | |
| April 6, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 47.0 ppb (44) | N/A | N/A | 22.1 μg/m3 (73) | 73.0 | |
| April 5, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 60.0 ppb (68) | N/A | N/A | 19.9 μg/m3 (68) | 68.0 | |
| April 5, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 65.0 ppb (84) | N/A | N/A | 19.1 μg/m3 (66) | 84.0 | |
| April 5, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 66.0 ppb (87) | N/A | N/A | 17.9 μg/m3 (64) | 87.0 | |
| April 5, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 67.0 ppb (91) | N/A | N/A | 16.1 μg/m3 (60) | 91.0 | |
| April 5, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 67.0 ppb (91) | N/A | N/A | 16.2 μg/m3 (60) | 91.0 | |
| April 5, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (15) | 58.0 ppb (61) | N/A | N/A | N/A | 61.0 | |
| April 5, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (32) | 46.0 ppb (43) | N/A | N/A | 11.3 μg/m3 (48) | 48.0 | |
| April 5, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (54) | 40.0 ppb (38) | N/A | N/A | 10.8 μg/m3 (46) | 54.0 | |
| April 5, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | N/A | 18.3 μg/m3 (65) | 65.0 | |
| April 5, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 95.0 ppb (110) | 22.0 ppb (21) | N/A | N/A | 36.0 μg/m3 (103) | 110.0 | |
| April 5, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (67) | 12.0 ppb (12) | N/A | N/A | 32.1 μg/m3 (94) | 94.0 | |
| April 5, 2021, noon | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (30) | 8.0 ppb (8) | N/A | N/A | 26.4 μg/m3 (82) | 82.0 | |
| April 5, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 4.0 ppb (4) | N/A | N/A | 19.7 μg/m3 (67) | 67.0 | |
| April 5, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | N/A | N/A | N/A | 16.1 μg/m3 (60) | 60.0 | |
| April 5, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 6.0 ppb (6) | N/A | N/A | 15.6 μg/m3 (59) | 59.0 | |
| April 5, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 10.0 ppb (10) | N/A | N/A | 14.9 μg/m3 (57) | 57.0 | |
| April 5, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 12.0 ppb (12) | N/A | N/A | 14.1 μg/m3 (56) | 56.0 | |
| April 5, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 13.0 ppb (13) | N/A | N/A | 13.5 μg/m3 (54) | 54.0 | |
| April 5, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 14.0 ppb (13) | N/A | N/A | 13.9 μg/m3 (55) | 55.0 | |
| April 5, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 18.0 ppb (17) | N/A | N/A | 12.6 μg/m3 (53) | 53.0 | |
| April 5, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | N/A | 13.2 μg/m3 (54) | 54.0 | |
| April 5, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 19.0 ppb (18) | N/A | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 5, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 42.0 ppb (39) | N/A | N/A | 11.6 μg/m3 (49) | 49.0 | |
| April 5, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 55.0 ppb (51) | N/A | N/A | 11.4 μg/m3 (48) | 51.0 | |
| April 4, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 59.0 ppb (65) | N/A | N/A | 11.3 μg/m3 (48) | 65.0 | |
| April 4, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 61.0 ppb (71) | N/A | N/A | 12.3 μg/m3 (52) | 71.0 | |
| April 4, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 62.0 ppb (74) | N/A | N/A | 13.8 μg/m3 (55) | 74.0 | |
| April 4, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 61.0 ppb (71) | N/A | N/A | 13.7 μg/m3 (55) | 71.0 | |
| April 4, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 61.0 ppb (71) | N/A | N/A | 13.7 μg/m3 (55) | 71.0 | |
| April 4, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 59.0 ppb (65) | N/A | N/A | 13.9 μg/m3 (55) | 65.0 | |
| April 4, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 59.0 ppb (65) | N/A | N/A | 15.6 μg/m3 (59) | 65.0 | |
| April 4, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 57.0 ppb (58) | N/A | N/A | 17.6 μg/m3 (63) | 63.0 | |
| April 4, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 52.0 ppb (49) | N/A | N/A | 16.4 μg/m3 (61) | 61.0 | |
| April 4, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 45.0 ppb (42) | N/A | N/A | 13.7 μg/m3 (55) | 55.0 | |
| April 4, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (35) | 26.0 ppb (25) | N/A | N/A | 18.7 μg/m3 (65) | 65.0 | |
| April 4, 2021, noon | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (32) | 13.0 ppb (13) | N/A | N/A | 14.8 μg/m3 (57) | 57.0 | |
| April 4, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (35) | 8.0 ppb (8) | N/A | N/A | 13.3 μg/m3 (54) | 54.0 | |
| April 4, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (38) | N/A | N/A | N/A | 17.1 μg/m3 (62) | 62.0 | |
| April 4, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (18) | 12.0 ppb (12) | N/A | N/A | 12.8 μg/m3 (53) | 53.0 | |
| April 4, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (12) | 17.0 ppb (16) | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 4, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (13) | 19.0 ppb (18) | N/A | N/A | 11.7 μg/m3 (49) | 49.0 | |
| April 4, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 26.0 ppb (25) | N/A | N/A | 8.8 μg/m3 (37) | 37.0 | |
| April 4, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 36.0 ppb (34) | N/A | N/A | 6.3 μg/m3 (27) | 34.0 | |
| April 4, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 38.0 ppb (36) | N/A | N/A | 6.3 μg/m3 (27) | 36.0 | |
| April 4, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | N/A | 5.7 μg/m3 (24) | 36.0 | |
| April 4, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 41.0 ppb (38) | N/A | N/A | 5.7 μg/m3 (24) | 38.0 | |
| April 4, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 46.0 ppb (43) | N/A | N/A | 6.0 μg/m3 (25) | 43.0 | |
| April 4, 2021, midnight | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 49.0 ppb (46) | N/A | N/A | 5.8 μg/m3 (25) | 46.0 | |
| April 3, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 50.0 ppb (47) | N/A | N/A | 5.7 μg/m3 (24) | 47.0 | |
| April 3, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 51.0 ppb (48) | N/A | N/A | 6.1 μg/m3 (26) | 48.0 | |
| April 3, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 52.0 ppb (49) | N/A | N/A | 6.3 μg/m3 (27) | 49.0 | |
| April 3, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 51.0 ppb (48) | N/A | N/A | 6.0 μg/m3 (25) | 48.0 | |
| April 3, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 50.0 ppb (47) | N/A | N/A | 6.0 μg/m3 (25) | 47.0 | |
| April 3, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 49.0 ppb (46) | N/A | N/A | 6.4 μg/m3 (27) | 46.0 | |
| April 3, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (2) | 48.0 ppb (45) | N/A | N/A | 6.5 μg/m3 (28) | 45.0 | |
| April 3, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (5) | 45.0 ppb (42) | N/A | N/A | 6.7 μg/m3 (28) | 42.0 | |
| April 3, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (18) | 35.0 ppb (33) | N/A | N/A | 9.4 μg/m3 (40) | 40.0 | |
| April 3, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (26) | 23.0 ppb (22) | N/A | N/A | 15.7 μg/m3 (59) | 59.0 | |
| April 3, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (26) | 12.0 ppb (12) | N/A | N/A | 21.7 μg/m3 (72) | 72.0 | |
| April 3, 2021, noon | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | 8.0 ppb (8) | N/A | N/A | 19.5 μg/m3 (67) | 67.0 | |
| April 3, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (3) | 4.0 ppb (4) | N/A | N/A | 14.1 μg/m3 (56) | 56.0 |