Saint Louis (Hyde Park) MO, US: 38.656449, -90.198548
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 7, 2021, 4 a.m. | 24.3 ppb (23) | 0.9 ppb (1) | 23.5 ppb (23) | 24.0 ppb (23) | N/A | 1.0 ppb (2) | 20.0 ppb (19) | 0.41 ppb (5) | N/A | 10.9 μg/m3 (46) | 46.0 | |
| March 7, 2021, 3 a.m. | 22.8 ppb (22) | 0.9 ppb (1) | 18.1 ppb (18) | 22.0 ppb (21) | N/A | 3.0 ppb (5) | 27.0 ppb (25) | 0.32 ppb (4) | N/A | 10.7 μg/m3 (45) | 45.0 | |
| March 7, 2021, 2 a.m. | 38.9 ppb (37) | 2.5 ppb (3) | 29.2 ppb (28) | 37.0 ppb (35) | N/A | 2.0 ppb (3) | 15.0 ppb (14) | 0.39 ppb (5) | N/A | 14.2 μg/m3 (56) | 56.0 | |
| March 7, 2021, 1 a.m. | 22.1 ppb (21) | 0.6 ppb (1) | 17.5 ppb (17) | 22.0 ppb (21) | N/A | 1.0 ppb (2) | 30.0 ppb (28) | 0.26 ppb (4) | N/A | 5.1 μg/m3 (22) | 28.0 | |
| March 7, 2021, midnight | 20.2 ppb (20) | 0.9 ppb (1) | 15.7 ppb (15) | 19.0 ppb (18) | N/A | 1.0 ppb (2) | 32.0 ppb (30) | 0.29 ppb (4) | N/A | 7.7 μg/m3 (33) | 33.0 | |
| March 6, 2021, 11 p.m. | 9.6 ppb (10) | 0.9 ppb (1) | 8.6 ppb (9) | 9.0 ppb (9) | N/A | 1.0 ppb (2) | 42.0 ppb (39) | 0.22 ppb (3) | N/A | 5.9 μg/m3 (25) | 39.0 | |
| March 6, 2021, 10 p.m. | 5.8 ppb (6) | 1.1 ppb (2) | 5.5 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 47.0 ppb (44) | 0.2 ppb (3) | N/A | 1.3 μg/m3 (6) | 44.0 | |
| March 6, 2021, 9 p.m. | 8.4 ppb (8) | 2.3 ppb (3) | 8.1 ppb (8) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.21 ppb (3) | N/A | 5.4 μg/m3 (23) | 42.0 | |
| March 6, 2021, 8 p.m. | 11.1 ppb (11) | 2.9 ppb (3) | 9.5 ppb (9) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.23 ppb (3) | N/A | 7.5 μg/m3 (32) | 41.0 | |
| March 6, 2021, 7 p.m. | 4.4 ppb (5) | 1.2 ppb (2) | 4.4 ppb (5) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.2 ppb (3) | N/A | 42.8 μg/m3 (119) | 119.0 | |
| March 6, 2021, 6 p.m. | 5.9 ppb (6) | 1.9 ppb (2) | 5.7 ppb (6) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.18 ppb (3) | N/A | 6.4 μg/m3 (27) | 41.0 | |
| March 6, 2021, 5 p.m. | 10.7 ppb (11) | 3.4 ppb (4) | 10.5 ppb (10) | 7.0 ppb (7) | N/A | 1.0 ppb (2) | 39.0 ppb (37) | 0.19 ppb (3) | N/A | 9.5 μg/m3 (40) | 40.0 | |
| March 6, 2021, 4 p.m. | 21.1 ppb (20) | 7.8 ppb (8) | 20.2 ppb (20) | 13.0 ppb (13) | N/A | 1.0 ppb (2) | 33.0 ppb (31) | 0.23 ppb (3) | N/A | 14.8 μg/m3 (57) | 57.0 | |
| March 6, 2021, 3 p.m. | 35.3 ppb (34) | 13.2 ppb (13) | 33.3 ppb (32) | 22.0 ppb (21) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.28 ppb (4) | N/A | 15.6 μg/m3 (59) | 59.0 | |
| March 6, 2021, 2 p.m. | 101.9 ppb (102) | 65.1 ppb (63) | 94.7 ppb (95) | 37.0 ppb (35) | N/A | 1.0 ppb (2) | 8.0 ppb (8) | 0.45 ppb (6) | N/A | 29.5 μg/m3 (88) | 102.0 | |
| March 6, 2021, 1 p.m. | 184.4 ppb (117) | 145.2 ppb (110) | 174.5 ppb (115) | 39.0 ppb (37) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.62 ppb (7) | N/A | 24.4 μg/m3 (77) | 117.0 | |
| March 6, 2021, noon | 183.3 ppb (117) | 147.7 ppb (110) | 199.2 ppb (120) | 36.0 ppb (34) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.96 ppb (12) | N/A | 24.0 μg/m3 (77) | 120.0 | |
| March 6, 2021, 11 a.m. | 123.1 ppb (106) | 87.7 ppb (87) | 119.9 ppb (105) | 35.0 ppb (34) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 1.05 ppb (13) | N/A | 17.6 μg/m3 (63) | 106.0 | |
| March 6, 2021, 10 a.m. | 149.8 ppb (111) | 112.4 ppb (104) | 140.3 ppb (109) | 37.0 ppb (35) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.94 ppb (11) | N/A | 18.0 μg/m3 (64) | 111.0 | |
| March 6, 2021, 9 a.m. | 131.5 ppb (107) | 94.2 ppb (94) | 129.8 ppb (107) | 38.0 ppb (36) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.93 ppb (11) | N/A | 16.0 μg/m3 (60) | 107.0 | |
| March 6, 2021, 8 a.m. | 91.6 ppb (92) | 50.8 ppb (48) | 83.6 ppb (83) | 41.0 ppb (39) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.91 ppb (11) | N/A | 35.8 μg/m3 (102) | 102.0 | |
| March 6, 2021, 7 a.m. | 92.5 ppb (93) | 51.5 ppb (49) | 80.6 ppb (80) | 41.0 ppb (39) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 1.02 ppb (12) | N/A | 24.6 μg/m3 (78) | 93.0 | |
| March 6, 2021, 6 a.m. | 101.7 ppb (102) | 61.8 ppb (60) | 89.3 ppb (89) | 40.0 ppb (38) | N/A | 1.0 ppb (2) | 2.0 ppb (2) | 1.22 ppb (14) | N/A | 27.4 μg/m3 (84) | 102.0 | |
| March 6, 2021, 5 a.m. | 94.0 ppb (94) | 52.4 ppb (50) | 83.5 ppb (83) | 42.0 ppb (40) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.97 ppb (12) | N/A | 12.8 μg/m3 (53) | 94.0 | |
| March 6, 2021, 4 a.m. | 72.4 ppb (71) | 28.1 ppb (27) | 59.1 ppb (57) | 44.0 ppb (42) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.71 ppb (8) | N/A | 13.3 μg/m3 (54) | 71.0 | |
| March 6, 2021, 3 a.m. | 71.0 ppb (70) | 27.0 ppb (26) | 59.9 ppb (58) | 44.0 ppb (42) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.74 ppb (8) | N/A | 16.0 μg/m3 (60) | 70.0 | |
| March 6, 2021, 2 a.m. | 66.0 ppb (64) | 20.7 ppb (20) | 51.5 ppb (49) | 45.0 ppb (43) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.86 ppb (11) | N/A | 12.1 μg/m3 (51) | 64.0 | |
| March 6, 2021, 1 a.m. | 47.9 ppb (46) | 5.8 ppb (6) | 35.8 ppb (34) | 42.0 ppb (40) | N/A | 0.0 ppb (0) | 5.0 ppb (5) | 0.55 ppb (7) | N/A | 7.7 μg/m3 (33) | 46.0 | |
| March 6, 2021, midnight | 30.6 ppb (29) | 1.8 ppb (2) | 25.8 ppb (25) | 29.0 ppb (28) | N/A | 1.0 ppb (2) | 19.0 ppb (18) | 0.34 ppb (4) | N/A | 4.9 μg/m3 (21) | 29.0 | |
| March 5, 2021, 11 p.m. | 19.1 ppb (19) | 3.6 ppb (4) | 15.5 ppb (15) | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.25 ppb (3) | N/A | 2.7 μg/m3 (12) | 30.0 | |
| March 5, 2021, 10 p.m. | 14.0 ppb (14) | 3.8 ppb (4) | 11.8 ppb (12) | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.24 ppb (3) | N/A | 2.4 μg/m3 (10) | 33.0 | |
| March 5, 2021, 9 p.m. | 9.3 ppb (9) | 2.9 ppb (3) | 9.0 ppb (9) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.2 ppb (3) | N/A | 3.3 μg/m3 (14) | 36.0 | |
| March 5, 2021, 8 p.m. | 13.5 ppb (13) | 4.9 ppb (5) | 11.4 ppb (11) | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.21 ppb (3) | N/A | 5.8 μg/m3 (25) | 34.0 | |
| March 5, 2021, 7 p.m. | 10.9 ppb (11) | 4.2 ppb (4) | 9.7 ppb (10) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.2 ppb (3) | N/A | 1.7 μg/m3 (8) | 34.0 | |
| March 5, 2021, 6 p.m. | 10.7 ppb (11) | 4.9 ppb (5) | 10.9 ppb (11) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.19 ppb (3) | N/A | 5.4 μg/m3 (23) | 34.0 | |
| March 5, 2021, 5 p.m. | 11.7 ppb (12) | 4.8 ppb (5) | 10.9 ppb (11) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.18 ppb (3) | N/A | 4.3 μg/m3 (18) | 31.0 | |
| March 5, 2021, 4 p.m. | 13.2 ppb (13) | 6.4 ppb (7) | 11.8 ppb (12) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.19 ppb (3) | N/A | 4.9 μg/m3 (21) | 28.0 | |
| March 5, 2021, 3 p.m. | 17.7 ppb (17) | 8.4 ppb (8) | 15.5 ppb (15) | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.2 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 5, 2021, 2 p.m. | 21.4 ppb (21) | 9.6 ppb (10) | 18.3 ppb (18) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.22 ppb (3) | N/A | 5.7 μg/m3 (24) | 24.0 | |
| March 5, 2021, 1 p.m. | 26.7 ppb (26) | 10.5 ppb (10) | 21.5 ppb (21) | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 16.0 ppb (15) | 0.23 ppb (3) | N/A | 8.9 μg/m3 (38) | 38.0 | |
| March 5, 2021, noon | 22.5 ppb (22) | 6.6 ppb (7) | 19.0 ppb (18) | 16.0 ppb (16) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.24 ppb (3) | N/A | 8.2 μg/m3 (35) | 35.0 | |
| March 5, 2021, 11 a.m. | 22.4 ppb (22) | 5.2 ppb (5) | 17.7 ppb (17) | 17.0 ppb (17) | N/A | 4.0 ppb (6) | 14.0 ppb (13) | 0.3 ppb (4) | N/A | 6.3 μg/m3 (27) | 27.0 | |
| March 5, 2021, 10 a.m. | 11.9 ppb (12) | 2.4 ppb (3) | 9.8 ppb (10) | 10.0 ppb (10) | N/A | 3.0 ppb (5) | 20.0 ppb (19) | 0.27 ppb (4) | N/A | 7.7 μg/m3 (33) | 33.0 | |
| March 5, 2021, 9 a.m. | 17.3 ppb (17) | 3.3 ppb (4) | 14.0 ppb (14) | 14.0 ppb (14) | N/A | 4.0 ppb (6) | 16.0 ppb (15) | 0.32 ppb (4) | N/A | 8.9 μg/m3 (38) | 38.0 | |
| March 5, 2021, 8 a.m. | 9.4 ppb (9) | 1.8 ppb (2) | 7.8 ppb (8) | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 22.0 ppb (21) | 0.28 ppb (4) | N/A | 4.0 μg/m3 (17) | 21.0 | |
| March 5, 2021, 7 a.m. | 20.3 ppb (20) | 3.2 ppb (4) | 16.5 ppb (16) | 17.0 ppb (17) | N/A | 5.0 ppb (8) | 15.0 ppb (14) | 0.3 ppb (4) | N/A | 8.5 μg/m3 (36) | 36.0 | |
| March 5, 2021, 6 a.m. | 26.2 ppb (25) | 4.7 ppb (5) | 20.8 ppb (20) | 22.0 ppb (21) | N/A | 7.0 ppb (10) | 13.0 ppb (13) | 0.23 ppb (3) | N/A | 8.3 μg/m3 (35) | 35.0 | |
| March 5, 2021, 5 a.m. | 19.5 ppb (19) | 3.0 ppb (3) | 15.8 ppb (15) | 17.0 ppb (17) | N/A | 5.0 ppb (8) | 19.0 ppb (18) | 0.36 ppb (5) | N/A | 9.5 μg/m3 (40) | 40.0 | |
| March 5, 2021, 4 a.m. | 21.5 ppb (21) | 3.6 ppb (4) | 17.8 ppb (17) | 18.0 ppb (17) | N/A | 7.0 ppb (10) | 19.0 ppb (18) | 0.32 ppb (4) | N/A | 11.1 μg/m3 (47) | 47.0 | |
| March 5, 2021, 3 a.m. | 18.3 ppb (18) | 3.1 ppb (3) | 14.6 ppb (14) | 15.0 ppb (15) | N/A | 4.0 ppb (6) | 23.0 ppb (22) | 0.31 ppb (4) | N/A | 2.1 μg/m3 (9) | 22.0 | |
| March 5, 2021, 2 a.m. | 16.3 ppb (16) | 2.6 ppb (3) | 13.5 ppb (13) | 14.0 ppb (14) | N/A | 1.0 ppb (2) | 25.0 ppb (24) | 0.26 ppb (4) | N/A | 5.5 μg/m3 (23) | 24.0 | |
| March 5, 2021, 1 a.m. | 17.9 ppb (17) | 2.9 ppb (3) | 15.6 ppb (15) | 15.0 ppb (15) | N/A | 4.0 ppb (6) | 28.0 ppb (26) | 0.31 ppb (4) | N/A | 8.5 μg/m3 (36) | 36.0 | |
| March 5, 2021, midnight | 16.6 ppb (16) | 2.7 ppb (3) | 13.7 ppb (13) | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.24 ppb (3) | N/A | 5.2 μg/m3 (22) | 31.0 | |
| March 4, 2021, 11 p.m. | 17.2 ppb (17) | 3.5 ppb (4) | 14.9 ppb (15) | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.23 ppb (3) | N/A | 3.9 μg/m3 (17) | 33.0 | |
| March 4, 2021, 10 p.m. | 15.4 ppb (15) | 4.3 ppb (5) | 13.3 ppb (13) | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.22 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 4, 2021, 9 p.m. | 17.2 ppb (17) | 5.0 ppb (5) | 15.7 ppb (15) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.24 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 4, 2021, 8 p.m. | 17.8 ppb (17) | 7.0 ppb (7) | 16.3 ppb (16) | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 37.0 | |
| March 4, 2021, 7 p.m. | 18.0 ppb (17) | 7.6 ppb (8) | 16.1 ppb (16) | 11.0 ppb (11) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.21 ppb (3) | N/A | 6.3 μg/m3 (27) | 36.0 | |
| March 4, 2021, 6 p.m. | 12.5 ppb (12) | 4.9 ppb (5) | 12.6 ppb (12) | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.2 ppb (3) | N/A | 12.9 μg/m3 (53) | 53.0 | |
| March 4, 2021, 5 p.m. | 15.7 ppb (15) | 6.1 ppb (6) | 14.9 ppb (15) | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.22 ppb (3) | N/A | 11.6 μg/m3 (49) | 49.0 | |
| March 4, 2021, 4 p.m. | 17.7 ppb (17) | 7.0 ppb (7) | 17.2 ppb (17) | 11.0 ppb (11) | N/A | 1.0 ppb (2) | 32.0 ppb (30) | 0.22 ppb (3) | N/A | 12.2 μg/m3 (52) | 52.0 | |
| March 4, 2021, 3 p.m. | 24.5 ppb (24) | 9.8 ppb (10) | 22.6 ppb (22) | 15.0 ppb (15) | N/A | 1.0 ppb (2) | 29.0 ppb (27) | 0.23 ppb (3) | N/A | 15.9 μg/m3 (59) | 59.0 | |
| March 4, 2021, 2 p.m. | 32.8 ppb (31) | 13.6 ppb (13) | 29.5 ppb (28) | 19.0 ppb (18) | N/A | 1.0 ppb (2) | 21.0 ppb (20) | 0.26 ppb (4) | N/A | 16.7 μg/m3 (61) | 61.0 | |
| March 4, 2021, 1 p.m. | 67.3 ppb (66) | 31.5 ppb (30) | 58.6 ppb (56) | 36.0 ppb (34) | N/A | 2.0 ppb (3) | 6.0 ppb (6) | 0.46 ppb (6) | N/A | 23.4 μg/m3 (75) | 75.0 | |
| March 4, 2021, noon | 62.4 ppb (60) | 19.3 ppb (19) | 56.5 ppb (54) | 43.0 ppb (41) | N/A | 1.0 ppb (2) | 2.0 ppb (2) | 0.61 ppb (7) | N/A | 16.4 μg/m3 (61) | 61.0 | |
| March 4, 2021, 11 a.m. | 47.0 ppb (45) | 8.9 ppb (9) | 38.0 ppb (36) | 38.0 ppb (36) | N/A | 1.0 ppb (2) | 4.0 ppb (4) | 0.66 ppb (8) | N/A | 13.4 μg/m3 (54) | 54.0 | |
| March 4, 2021, 10 a.m. | 48.7 ppb (46) | 7.8 ppb (8) | 39.1 ppb (37) | 41.0 ppb (39) | N/A | 2.0 ppb (3) | 3.0 ppb (3) | 0.8 ppb (10) | N/A | 19.1 μg/m3 (66) | 66.0 | |
| March 4, 2021, 9 a.m. | 57.1 ppb (55) | 15.3 ppb (15) | 47.1 ppb (45) | 42.0 ppb (40) | N/A | 1.0 ppb (2) | 3.0 ppb (3) | 0.56 ppb (7) | N/A | 16.7 μg/m3 (61) | 61.0 | |
| March 4, 2021, 8 a.m. | 58.0 ppb (56) | 17.7 ppb (17) | 52.5 ppb (50) | 40.0 ppb (38) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.7 ppb (8) | N/A | 12.3 μg/m3 (52) | 56.0 | |
| March 4, 2021, 7 a.m. | 55.0 ppb (53) | 12.3 ppb (12) | 45.5 ppb (43) | 43.0 ppb (41) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.58 ppb (7) | N/A | 19.7 μg/m3 (67) | 67.0 | |
| March 4, 2021, 6 a.m. | 60.0 ppb (58) | 12.5 ppb (12) | 47.3 ppb (45) | 48.0 ppb (46) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.47 ppb (6) | N/A | 13.7 μg/m3 (55) | 58.0 | |
| March 4, 2021, 5 a.m. | 64.3 ppb (62) | 17.0 ppb (17) | 49.5 ppb (47) | 47.0 ppb (45) | N/A | 1.0 ppb (2) | 2.0 ppb (2) | 0.58 ppb (7) | N/A | 16.7 μg/m3 (61) | 62.0 | |
| March 4, 2021, 4 a.m. | 65.9 ppb (64) | 17.0 ppb (17) | 51.3 ppb (49) | 49.0 ppb (47) | N/A | 1.0 ppb (2) | 2.0 ppb (2) | 0.57 ppb (7) | N/A | 13.8 μg/m3 (55) | 64.0 | |
| March 4, 2021, 3 a.m. | 67.6 ppb (66) | 16.1 ppb (16) | 58.0 ppb (56) | 52.0 ppb (50) | N/A | 1.0 ppb (2) | 1.0 ppb (1) | 0.65 ppb (8) | N/A | 12.3 μg/m3 (52) | 66.0 | |
| March 4, 2021, 2 a.m. | 58.1 ppb (56) | 5.9 ppb (6) | 46.2 ppb (44) | 52.0 ppb (50) | N/A | 1.0 ppb (2) | 3.0 ppb (3) | 0.51 ppb (6) | N/A | 10.4 μg/m3 (44) | 56.0 | |
| March 4, 2021, 1 a.m. | 72.4 ppb (71) | 15.6 ppb (15) | 61.1 ppb (59) | 57.0 ppb (55) | N/A | 1.0 ppb (2) | 2.0 ppb (2) | 0.63 ppb (7) | N/A | 10.3 μg/m3 (43) | 71.0 | |
| March 4, 2021, midnight | 45.9 ppb (44) | 2.4 ppb (3) | 42.8 ppb (41) | 44.0 ppb (42) | N/A | 0.0 ppb (0) | 12.0 ppb (12) | 0.63 ppb (7) | N/A | 11.8 μg/m3 (50) | 50.0 | |
| March 3, 2021, 11 p.m. | 18.4 ppb (18) | 1.0 ppb (1) | 16.3 ppb (16) | 18.0 ppb (17) | N/A | 1.0 ppb (2) | 39.0 ppb (37) | 0.55 ppb (7) | N/A | 8.4 μg/m3 (36) | 37.0 | |
| March 3, 2021, 10 p.m. | 4.4 ppb (5) | 0.8 ppb (1) | 4.3 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 50.0 ppb (47) | 0.21 ppb (3) | N/A | 6.9 μg/m3 (29) | 47.0 | |
| March 3, 2021, 9 p.m. | 6.5 ppb (7) | 2.6 ppb (3) | 6.2 ppb (6) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 49.0 ppb (46) | 0.29 ppb (4) | N/A | 10.0 μg/m3 (42) | 46.0 | |
| March 3, 2021, 8 p.m. | 10.6 ppb (10) | 4.9 ppb (5) | 8.2 ppb (8) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.28 ppb (4) | N/A | 8.6 μg/m3 (36) | 43.0 | |
| March 3, 2021, 7 p.m. | 8.9 ppb (9) | 4.6 ppb (5) | 7.6 ppb (8) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.31 ppb (4) | N/A | 10.2 μg/m3 (43) | 43.0 | |
| March 3, 2021, 6 p.m. | 3.7 ppb (4) | 1.4 ppb (2) | 4.0 ppb (4) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.28 ppb (4) | N/A | 7.8 μg/m3 (33) | 43.0 | |
| March 3, 2021, 5 p.m. | 5.6 ppb (6) | 2.5 ppb (3) | 5.0 ppb (5) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (40) | 0.28 ppb (4) | N/A | 9.6 μg/m3 (40) | 40.0 | |
| March 3, 2021, 4 p.m. | 6.5 ppb (7) | 3.0 ppb (3) | 5.5 ppb (6) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (38) | 0.23 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 3, 2021, 3 p.m. | 10.5 ppb (10) | 3.8 ppb (4) | 8.9 ppb (9) | 7.0 ppb (7) | N/A | 1.0 ppb (2) | 37.0 ppb (35) | 0.26 ppb (4) | N/A | 6.8 μg/m3 (29) | 35.0 | |
| March 3, 2021, 2 p.m. | 22.0 ppb (21) | 6.6 ppb (7) | 19.1 ppb (19) | 16.0 ppb (16) | N/A | 2.0 ppb (3) | 26.0 ppb (25) | 0.37 ppb (5) | N/A | 1.9 μg/m3 (8) | 25.0 | |
| March 3, 2021, 1 p.m. | 50.5 ppb (48) | 18.3 ppb (18) | 37.8 ppb (36) | 32.0 ppb (31) | N/A | 1.0 ppb (2) | 9.0 ppb (9) | 0.4 ppb (5) | N/A | 6.3 μg/m3 (27) | 48.0 | |
| March 3, 2021, noon | 44.0 ppb (42) | 6.9 ppb (7) | 31.3 ppb (30) | 37.0 ppb (35) | N/A | 0.0 ppb (0) | 3.0 ppb (3) | 0.35 ppb (4) | N/A | 6.9 μg/m3 (29) | 42.0 | |
| March 3, 2021, 11 a.m. | 75.4 ppb (74) | 30.1 ppb (29) | 43.7 ppb (42) | 47.0 ppb (45) | N/A | 0.0 ppb (0) | 2.0 ppb (2) | 0.34 ppb (4) | N/A | 6.3 μg/m3 (27) | 74.0 | |
| March 3, 2021, 10 a.m. | 49.7 ppb (47) | 24.6 ppb (24) | 47.4 ppb (45) | 29.0 ppb (28) | N/A | 0.0 ppb (0) | 7.0 ppb (7) | 0.29 ppb (4) | N/A | 3.7 μg/m3 (16) | 47.0 | |
| March 3, 2021, 9 a.m. | 53.5 ppb (51) | 22.7 ppb (22) | 45.1 ppb (43) | 32.0 ppb (31) | N/A | 0.0 ppb (0) | 7.0 ppb (7) | 0.28 ppb (4) | N/A | 8.0 μg/m3 (34) | 51.0 | |
| March 3, 2021, 8 a.m. | 50.1 ppb (48) | 20.6 ppb (20) | 35.5 ppb (34) | 30.0 ppb (29) | N/A | 1.0 ppb (2) | 10.0 ppb (10) | 0.26 ppb (4) | N/A | 4.7 μg/m3 (20) | 48.0 | |
| March 3, 2021, 7 a.m. | 55.5 ppb (53) | 23.3 ppb (22) | 34.1 ppb (33) | 33.0 ppb (32) | N/A | 1.0 ppb (2) | 11.0 ppb (11) | 0.28 ppb (4) | N/A | 5.7 μg/m3 (24) | 53.0 | |
| March 3, 2021, 6 a.m. | 62.1 ppb (60) | 31.1 ppb (30) | 35.9 ppb (34) | 33.0 ppb (32) | N/A | 1.0 ppb (2) | 14.0 ppb (13) | 0.4 ppb (5) | N/A | 3.2 μg/m3 (14) | 60.0 | |
| March 3, 2021, 5 a.m. | 34.7 ppb (33) | 16.5 ppb (16) | 19.2 ppb (19) | 22.0 ppb (21) | N/A | 1.0 ppb (2) | 19.0 ppb (18) | 0.26 ppb (4) | N/A | 4.9 μg/m3 (21) | 33.0 | |
| March 3, 2021, 4 a.m. | 21.6 ppb (21) | 5.7 ppb (6) | 13.5 ppb (13) | 17.0 ppb (17) | N/A | 1.0 ppb (2) | 23.0 ppb (22) | 0.23 ppb (3) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| March 3, 2021, 3 a.m. | 29.1 ppb (28) | 11.3 ppb (11) | 13.4 ppb (13) | 21.0 ppb (20) | N/A | 1.0 ppb (2) | 26.0 ppb (25) | 0.26 ppb (4) | N/A | 8.3 μg/m3 (35) | 35.0 | |
| March 3, 2021, 2 a.m. | 13.4 ppb (13) | 0.8 ppb (1) | 10.9 ppb (11) | 13.0 ppb (13) | N/A | 1.0 ppb (2) | 30.0 ppb (28) | 0.23 ppb (3) | N/A | 5.7 μg/m3 (24) | 28.0 | |
| March 3, 2021, 1 a.m. | 35.9 ppb (34) | 6.3 ppb (6) | 20.7 ppb (20) | 30.0 ppb (29) | N/A | 1.0 ppb (2) | 22.0 ppb (21) | 0.34 ppb (4) | N/A | 8.1 μg/m3 (34) | 34.0 | |
| March 3, 2021, midnight | 61.5 ppb (59) | 28.0 ppb (27) | 26.0 ppb (25) | 41.0 ppb (39) | N/A | 2.0 ppb (3) | 18.0 ppb (17) | 0.36 ppb (5) | N/A | 8.6 μg/m3 (36) | 59.0 | |
| March 2, 2021, 11 p.m. | 13.8 ppb (14) | 2.5 ppb (3) | 9.9 ppb (10) | 12.0 ppb (12) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.21 ppb (3) | N/A | 2.1 μg/m3 (9) | 33.0 | |
| March 2, 2021, 10 p.m. | 11.0 ppb (11) | 2.4 ppb (3) | 10.3 ppb (10) | 9.0 ppb (9) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.24 ppb (3) | N/A | 0.0 μg/m3 (0) | 36.0 | |
| March 2, 2021, 9 p.m. | 10.3 ppb (10) | 2.9 ppb (3) | 9.4 ppb (9) | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.2 ppb (3) | N/A | N/A | 36.0 | |
| March 2, 2021, 8 p.m. | 11.3 ppb (11) | 3.8 ppb (4) | 11.0 ppb (11) | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 35.0 ppb (33) | 0.21 ppb (3) | N/A | N/A | 33.0 | |
| March 2, 2021, 7 p.m. | 9.4 ppb (9) | 3.7 ppb (4) | 9.5 ppb (9) | 6.0 ppb (6) | N/A | 1.0 ppb (2) | 32.0 ppb (30) | 0.2 ppb (3) | N/A | 7.4 μg/m3 (31) | 31.0 | |
| March 2, 2021, 6 p.m. | 11.1 ppb (11) | 4.5 ppb (5) | 10.7 ppb (11) | 7.0 ppb (7) | N/A | 1.0 ppb (2) | 29.0 ppb (27) | 0.19 ppb (3) | N/A | 4.6 μg/m3 (20) | 27.0 | |
| March 2, 2021, 5 p.m. | 8.9 ppb (9) | 3.5 ppb (4) | 8.5 ppb (9) | 6.0 ppb (6) | N/A | 3.0 ppb (5) | 31.0 ppb (29) | 0.21 ppb (3) | N/A | 3.5 μg/m3 (15) | 29.0 | |
| March 2, 2021, 4 p.m. | 8.3 ppb (8) | 3.2 ppb (4) | 8.1 ppb (8) | 5.0 ppb (5) | N/A | 2.0 ppb (3) | 30.0 ppb (28) | 0.19 ppb (3) | N/A | 6.8 μg/m3 (29) | 29.0 | |
| March 2, 2021, 3 p.m. | 11.4 ppb (11) | 4.4 ppb (5) | 10.7 ppb (11) | 7.0 ppb (7) | N/A | 1.0 ppb (2) | 27.0 ppb (25) | 0.19 ppb (3) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| March 2, 2021, 2 p.m. | 28.0 ppb (27) | 11.8 ppb (12) | 24.0 ppb (23) | 16.0 ppb (16) | N/A | 1.0 ppb (2) | 19.0 ppb (18) | 0.25 ppb (3) | N/A | 10.7 μg/m3 (45) | 45.0 | |
| March 2, 2021, 1 p.m. | 52.2 ppb (50) | 23.3 ppb (22) | 45.3 ppb (43) | 29.0 ppb (28) | N/A | 0.0 ppb (0) | 7.0 ppb (7) | 0.28 ppb (4) | N/A | 11.3 μg/m3 (48) | 50.0 | |
| March 2, 2021, noon | 67.2 ppb (66) | 31.5 ppb (30) | 56.0 ppb (54) | 36.0 ppb (34) | N/A | 0.0 ppb (0) | 2.0 ppb (2) | 0.31 ppb (4) | N/A | 13.9 μg/m3 (55) | 66.0 | |
| March 2, 2021, 11 a.m. | 45.8 ppb (44) | 13.5 ppb (13) | 37.3 ppb (36) | 32.0 ppb (31) | N/A | 0.0 ppb (0) | 3.0 ppb (3) | 0.26 ppb (4) | N/A | 11.4 μg/m3 (48) | 48.0 | |
| March 2, 2021, 10 a.m. | 41.5 ppb (40) | 9.3 ppb (9) | 34.5 ppb (33) | 32.0 ppb (31) | N/A | 0.0 ppb (0) | 4.0 ppb (4) | 0.22 ppb (3) | N/A | 7.5 μg/m3 (32) | 40.0 | |
| March 2, 2021, 9 a.m. | 26.5 ppb (25) | 3.1 ppb (3) | 21.0 ppb (20) | 24.0 ppb (23) | N/A | 0.0 ppb (0) | 10.0 ppb (10) | 0.2 ppb (3) | N/A | 8.7 μg/m3 (37) | 37.0 | |
| March 2, 2021, 8 a.m. | 26.9 ppb (26) | 3.4 ppb (4) | 20.8 ppb (20) | 24.0 ppb (23) | N/A | 0.0 ppb (0) | 11.0 ppb (11) | 0.19 ppb (3) | N/A | 7.4 μg/m3 (31) | 31.0 | |
| March 2, 2021, 7 a.m. | 15.1 ppb (15) | 1.5 ppb (2) | 12.0 ppb (12) | 14.0 ppb (14) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.2 ppb (3) | N/A | 2.3 μg/m3 (10) | 19.0 | |
| March 2, 2021, 6 a.m. | 15.2 ppb (15) | 1.8 ppb (2) | 11.7 ppb (12) | 13.0 ppb (13) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.19 ppb (3) | N/A | 4.2 μg/m3 (18) | 22.0 | |
| March 2, 2021, 5 a.m. | 15.8 ppb (15) | 2.5 ppb (3) | 12.0 ppb (12) | 13.0 ppb (13) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.2 ppb (3) | N/A | 2.7 μg/m3 (12) | 21.0 | |
| March 2, 2021, 4 a.m. | 12.1 ppb (12) | 2.2 ppb (3) | 9.5 ppb (9) | 10.0 ppb (10) | N/A | 1.0 ppb (2) | 26.0 ppb (25) | 0.22 ppb (3) | N/A | 4.4 μg/m3 (19) | 25.0 | |
| March 2, 2021, 3 a.m. | 23.9 ppb (23) | 3.6 ppb (4) | 19.4 ppb (19) | 21.0 ppb (20) | N/A | 4.0 ppb (6) | 18.0 ppb (17) | 0.31 ppb (4) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| March 2, 2021, 2 a.m. | 24.0 ppb (23) | 3.4 ppb (4) | 19.0 ppb (18) | 21.0 ppb (20) | N/A | 2.0 ppb (3) | 19.0 ppb (18) | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 23.0 | |
| March 2, 2021, 1 a.m. | 40.3 ppb (39) | 4.3 ppb (5) | 31.8 ppb (30) | 36.0 ppb (34) | N/A | 0.0 ppb (0) | 8.0 ppb (8) | 0.32 ppb (4) | N/A | 6.0 μg/m3 (25) | 39.0 | |
| March 2, 2021, midnight | 18.5 ppb (18) | 1.3 ppb (2) | 14.8 ppb (14) | 17.0 ppb (17) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.29 ppb (4) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| March 1, 2021, 11 p.m. | 6.4 ppb (7) | 0.9 ppb (1) | 5.4 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.18 ppb (3) | N/A | 1.1 μg/m3 (5) | 33.0 | |
| March 1, 2021, 10 p.m. | 5.9 ppb (6) | 1.9 ppb (2) | 4.3 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.17 ppb (3) | N/A | 4.8 μg/m3 (20) | 36.0 | |
| March 1, 2021, 9 p.m. | 8.1 ppb (8) | 4.7 ppb (5) | 6.7 ppb (7) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.21 ppb (3) | N/A | 0.6 μg/m3 (3) | 36.0 | |
| March 1, 2021, 8 p.m. | 6.0 ppb (6) | 2.3 ppb (3) | 4.4 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.18 ppb (3) | N/A | 5.1 μg/m3 (22) | 37.0 | |
| March 1, 2021, 7 p.m. | 8.8 ppb (9) | 3.6 ppb (4) | 7.0 ppb (7) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 36.0 ppb (34) | 0.23 ppb (3) | N/A | 0.3 μg/m3 (2) | 34.0 | |
| March 1, 2021, 6 p.m. | 8.6 ppb (9) | 4.0 ppb (4) | 7.6 ppb (8) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.22 ppb (3) | N/A | 2.6 μg/m3 (11) | 33.0 | |
| March 1, 2021, 5 p.m. | 11.7 ppb (12) | 5.9 ppb (6) | 10.3 ppb (10) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.25 ppb (3) | N/A | 9.1 μg/m3 (38) | 38.0 | |
| March 1, 2021, 4 p.m. | 15.5 ppb (15) | 8.3 ppb (8) | 13.2 ppb (13) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.23 ppb (3) | N/A | 5.6 μg/m3 (24) | 25.0 | |
| March 1, 2021, 3 p.m. | 14.5 ppb (14) | 6.2 ppb (6) | 12.5 ppb (12) | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.27 ppb (4) | N/A | 5.9 μg/m3 (25) | 25.0 | |
| March 1, 2021, 2 p.m. | 15.8 ppb (15) | 6.1 ppb (6) | 13.0 ppb (13) | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.31 ppb (4) | N/A | 8.3 μg/m3 (35) | 35.0 | |
| March 1, 2021, 1 p.m. | 19.6 ppb (19) | 4.6 ppb (5) | 15.4 ppb (15) | 15.0 ppb (15) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.25 ppb (3) | N/A | 11.2 μg/m3 (47) | 47.0 | |
| March 1, 2021, noon | 12.8 ppb (13) | 2.3 ppb (3) | 10.0 ppb (10) | 11.0 ppb (11) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.2 ppb (3) | N/A | 3.7 μg/m3 (16) | 19.0 | |
| March 1, 2021, 11 a.m. | 6.6 ppb (7) | 0.9 ppb (1) | 5.3 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.18 ppb (3) | N/A | -0.4 μg/m3 (0) | 24.0 | |
| March 1, 2021, 10 a.m. | 4.3 ppb (5) | 0.4 ppb (1) | 3.6 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.17 ppb (3) | N/A | 5.4 μg/m3 (23) | 25.0 | |
| March 1, 2021, 9 a.m. | 4.0 ppb (4) | 0.3 ppb (1) | 3.4 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.17 ppb (3) | N/A | 1.6 μg/m3 (7) | 26.0 | |
| March 1, 2021, 8 a.m. | 4.6 ppb (5) | 0.3 ppb (1) | 3.8 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.17 ppb (3) | N/A | 5.8 μg/m3 (25) | 25.0 | |
| March 1, 2021, 7 a.m. | 2.4 ppb (3) | 0.3 ppb (1) | 2.2 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | N/A | 6.0 μg/m3 (25) | 29.0 | |
| March 1, 2021, 6 a.m. | 2.6 ppb (3) | 0.3 ppb (1) | 2.3 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | N/A | 6.3 μg/m3 (27) | 29.0 | |
| March 1, 2021, 5 a.m. | 3.2 ppb (4) | 0.3 ppb (1) | 2.8 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.17 ppb (3) | N/A | 2.7 μg/m3 (12) | 28.0 | |
| March 1, 2021, 4 a.m. | 6.2 ppb (6) | 0.4 ppb (1) | 5.1 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.18 ppb (3) | N/A | 1.7 μg/m3 (8) | 27.0 | |
| March 1, 2021, 3 a.m. | 4.5 ppb (5) | 0.3 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.19 ppb (3) | N/A | 2.4 μg/m3 (10) | 28.0 | |
| March 1, 2021, 2 a.m. | 3.8 ppb (4) | 0.3 ppb (1) | 3.6 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.18 ppb (3) | N/A | 10.2 μg/m3 (43) | 43.0 | |
| March 1, 2021, 1 a.m. | 2.5 ppb (3) | 0.5 ppb (1) | 2.5 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.17 ppb (3) | N/A | 2.6 μg/m3 (11) | 31.0 | |
| March 1, 2021, midnight | 2.5 ppb (3) | 0.3 ppb (1) | 2.5 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.17 ppb (3) | N/A | -3.4 μg/m3 (0) | 32.0 | |
| Feb. 28, 2021, 11 p.m. | 7.3 ppb (7) | 0.4 ppb (1) | 6.4 ppb (7) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.21 ppb (3) | N/A | 6.6 μg/m3 (28) | 28.0 | |
| Feb. 28, 2021, 10 p.m. | 5.5 ppb (6) | 0.3 ppb (1) | 5.4 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.21 ppb (3) | N/A | 4.9 μg/m3 (21) | 23.0 | |
| Feb. 28, 2021, 9 p.m. | 5.6 ppb (6) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.22 ppb (3) | N/A | 7.3 μg/m3 (31) | 31.0 | |
| Feb. 28, 2021, 8 p.m. | 7.3 ppb (7) | 1.3 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 14.0 ppb (13) | 0.25 ppb (3) | N/A | 10.4 μg/m3 (44) | 44.0 | |
| Feb. 28, 2021, 7 p.m. | 8.3 ppb (8) | 1.6 ppb (2) | N/A | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 13.0 ppb (13) | 0.24 ppb (3) | N/A | 4.4 μg/m3 (19) | 19.0 | |
| Feb. 28, 2021, 6 p.m. | 3.4 ppb (4) | 0.6 ppb (1) | 3.3 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 18.0 ppb (17) | 0.19 ppb (3) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Feb. 28, 2021, 5 p.m. | 6.6 ppb (7) | 1.2 ppb (2) | 6.1 ppb (6) | 6.0 ppb (6) | N/A | 1.0 ppb (2) | 15.0 ppb (14) | 0.22 ppb (3) | N/A | 2.9 μg/m3 (13) | 14.0 | |
| Feb. 28, 2021, 4 p.m. | 12.5 ppb (12) | 4.2 ppb (4) | 10.9 ppb (11) | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 11.0 ppb (11) | 0.26 ppb (4) | N/A | 3.8 μg/m3 (16) | 16.0 | |
| Feb. 28, 2021, 3 p.m. | 22.0 ppb (21) | 6.7 ppb (7) | 19.0 ppb (18) | 15.0 ppb (15) | N/A | N/A | 7.0 ppb (7) | 0.28 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| Feb. 28, 2021, 2 p.m. | 60.8 ppb (59) | 39.0 ppb (37) | 54.3 ppb (52) | 22.0 ppb (21) | N/A | N/A | 3.0 ppb (3) | 0.41 ppb (5) | N/A | 7.9 μg/m3 (33) | 59.0 | |
| Feb. 28, 2021, 1 p.m. | 56.4 ppb (54) | 30.7 ppb (29) | 50.8 ppb (48) | 26.0 ppb (25) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.36 ppb (5) | N/A | 8.0 μg/m3 (34) | 54.0 | |
| Feb. 28, 2021, noon | 33.8 ppb (32) | 10.3 ppb (10) | 25.3 ppb (24) | 24.0 ppb (23) | N/A | 0.0 ppb (0) | 2.0 ppb (2) | 0.32 ppb (4) | N/A | 5.1 μg/m3 (22) | 32.0 | |
| Feb. 28, 2021, 11 a.m. | 21.8 ppb (21) | 1.2 ppb (2) | 16.7 ppb (16) | 21.0 ppb (20) | N/A | 0.0 ppb (0) | 5.0 ppb (5) | N/A | N/A | 7.5 μg/m3 (32) | 32.0 | |
| Feb. 28, 2021, 10 a.m. | 13.1 ppb (13) | 0.4 ppb (1) | 10.3 ppb (10) | 13.0 ppb (13) | N/A | 0.0 ppb (0) | 12.0 ppb (12) | N/A | N/A | 4.3 μg/m3 (18) | 18.0 | |
| Feb. 28, 2021, 9 a.m. | 9.9 ppb (10) | 0.3 ppb (1) | 7.7 ppb (8) | 10.0 ppb (10) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.19 ppb (3) | N/A | 0.5 μg/m3 (3) | 14.0 | |
| Feb. 28, 2021, 8 a.m. | 7.8 ppb (8) | 0.4 ppb (1) | 6.2 ppb (6) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | N/A | 0.19 ppb (3) | N/A | 0.5 μg/m3 (3) | 8.0 | |
| Feb. 28, 2021, 7 a.m. | 6.9 ppb (7) | 0.4 ppb (1) | 5.6 ppb (6) | 7.0 ppb (7) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.22 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Feb. 28, 2021, 6 a.m. | 6.7 ppb (7) | 0.6 ppb (1) | 5.5 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.21 ppb (3) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| Feb. 28, 2021, 5 a.m. | 10.1 ppb (10) | 1.0 ppb (1) | 8.8 ppb (9) | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 19.0 ppb (18) | 0.27 ppb (4) | N/A | 6.9 μg/m3 (29) | 29.0 |