Anaheim (Swest Anaheim) CA, US: 33.830586, -117.938509
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 20, 2021, 8 a.m. | 3.8 ppb (4) | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (31) | 0.16 ppb (3) | 32.5 μg/m3 (31) | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 7 a.m. | 5.4 ppb (6) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 31.0 ppb (29) | 0.15 ppb (2) | 31.7 μg/m3 (30) | 9.8 μg/m3 (41) | 41.0 | |
| April 20, 2021, 6 a.m. | 5.7 ppb (6) | 0.0 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 31.0 ppb (29) | 0.17 ppb (3) | 29.3 μg/m3 (28) | 11.7 μg/m3 (49) | 49.0 | |
| April 20, 2021, 5 a.m. | 5.8 ppb (6) | 0.0 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 33.0 ppb (31) | 0.19 ppb (3) | 24.6 μg/m3 (23) | 11.9 μg/m3 (50) | 50.0 | |
| April 20, 2021, 4 a.m. | 6.8 ppb (7) | 0.0 ppb (0) | N/A | 7.0 ppb (7) | N/A | N/A | 32.0 ppb (30) | 0.2 ppb (3) | 28.3 μg/m3 (27) | 9.8 μg/m3 (41) | 41.0 | |
| April 20, 2021, 3 a.m. | 7.8 ppb (8) | 0.0 ppb (0) | N/A | 8.0 ppb (8) | N/A | N/A | 36.0 ppb (34) | 0.2 ppb (3) | 25.9 μg/m3 (24) | 8.5 μg/m3 (36) | 36.0 | |
| April 20, 2021, 2 a.m. | 8.0 ppb (8) | 0.0 ppb (0) | N/A | 8.0 ppb (8) | N/A | N/A | 40.0 ppb (38) | 0.21 ppb (3) | 18.8 μg/m3 (18) | 6.3 μg/m3 (27) | 38.0 | |
| April 20, 2021, 1 a.m. | 8.6 ppb (9) | 0.4 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 45.0 ppb (42) | 0.21 ppb (3) | 23.1 μg/m3 (22) | 5.6 μg/m3 (24) | 42.0 | |
| April 20, 2021, midnight | 8.5 ppb (9) | 0.9 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 48.0 ppb (45) | 0.21 ppb (3) | 20.7 μg/m3 (20) | 4.6 μg/m3 (20) | 45.0 | |
| April 19, 2021, 11 p.m. | 5.3 ppb (5) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 51.0 ppb (48) | 0.18 ppb (3) | 19.9 μg/m3 (19) | 6.8 μg/m3 (29) | 48.0 | |
| April 19, 2021, 10 p.m. | 4.1 ppb (4) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 55.0 ppb (51) | 0.18 ppb (3) | 22.4 μg/m3 (21) | 7.8 μg/m3 (33) | 51.0 | |
| April 19, 2021, 9 p.m. | 4.0 ppb (4) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 58.0 ppb (61) | 0.19 ppb (3) | 27.3 μg/m3 (26) | 8.3 μg/m3 (35) | 61.0 | |
| April 19, 2021, 8 p.m. | 6.4 ppb (7) | 0.9 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 56.0 ppb (55) | 0.21 ppb (3) | 35.1 μg/m3 (33) | 8.8 μg/m3 (37) | 55.0 | |
| April 19, 2021, 7 p.m. | 7.8 ppb (8) | 1.2 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | 53.0 ppb (50) | 0.23 ppb (3) | 32.1 μg/m3 (30) | 9.6 μg/m3 (40) | 50.0 | |
| April 19, 2021, 6 p.m. | 8.4 ppb (8) | 1.3 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | 50.0 ppb (47) | 0.26 ppb (4) | 32.1 μg/m3 (30) | 9.5 μg/m3 (40) | 47.0 | |
| April 19, 2021, 5 p.m. | 16.9 ppb (16) | 3.5 ppb (4) | N/A | 13.0 ppb (13) | N/A | N/A | 41.0 ppb (38) | 0.39 ppb (5) | 41.1 μg/m3 (39) | 8.8 μg/m3 (37) | 39.0 | |
| April 19, 2021, 4 p.m. | 23.1 ppb (22) | 5.8 ppb (6) | N/A | 17.0 ppb (17) | N/A | N/A | 32.0 ppb (30) | 0.43 ppb (5) | 44.5 μg/m3 (42) | 9.8 μg/m3 (41) | 42.0 | |
| April 19, 2021, 3 p.m. | 51.7 ppb (49) | 20.2 ppb (20) | N/A | 31.0 ppb (30) | N/A | N/A | 14.0 ppb (13) | 0.62 ppb (7) | 57.9 μg/m3 (53) | 18.5 μg/m3 (65) | 65.0 | |
| April 19, 2021, 2 p.m. | 68.9 ppb (67) | 33.7 ppb (32) | N/A | 35.0 ppb (34) | N/A | N/A | 4.0 ppb (4) | 0.75 ppb (10) | 54.0 μg/m3 (50) | 11.6 μg/m3 (49) | 67.0 | |
| April 19, 2021, 1 p.m. | 65.1 ppb (63) | 29.0 ppb (28) | N/A | 36.0 ppb (34) | N/A | N/A | 0.0 ppb (0) | 0.78 ppb (10) | 40.4 μg/m3 (38) | 8.8 μg/m3 (37) | 63.0 | |
| April 19, 2021, noon | 53.8 ppb (51) | 20.4 ppb (20) | N/A | 33.0 ppb (32) | N/A | N/A | 0.0 ppb (0) | 0.61 ppb (7) | 33.2 μg/m3 (31) | 6.5 μg/m3 (28) | 51.0 | |
| April 19, 2021, 11 a.m. | 29.3 ppb (28) | 3.0 ppb (3) | N/A | 26.0 ppb (25) | N/A | N/A | 2.0 ppb (2) | 0.49 ppb (6) | 22.5 μg/m3 (21) | 6.1 μg/m3 (26) | 28.0 | |
| April 19, 2021, 10 a.m. | 32.4 ppb (31) | 4.2 ppb (4) | N/A | 28.0 ppb (27) | N/A | N/A | 0.0 ppb (0) | 0.64 ppb (7) | 26.1 μg/m3 (25) | 9.8 μg/m3 (41) | 41.0 | |
| April 19, 2021, 9 a.m. | 33.7 ppb (32) | 4.0 ppb (4) | N/A | 30.0 ppb (29) | N/A | N/A | 1.0 ppb (1) | 0.6 ppb (7) | 29.5 μg/m3 (28) | 12.4 μg/m3 (52) | 52.0 | |
| April 19, 2021, 8 a.m. | 39.9 ppb (38) | 7.3 ppb (7) | N/A | 33.0 ppb (32) | N/A | N/A | 0.0 ppb (0) | 0.74 ppb (8) | 26.1 μg/m3 (25) | 12.2 μg/m3 (52) | 52.0 | |
| April 19, 2021, 7 a.m. | 25.1 ppb (24) | 0.9 ppb (1) | N/A | 24.0 ppb (23) | N/A | N/A | 11.0 ppb (11) | 0.53 ppb (6) | 25.9 μg/m3 (24) | 10.8 μg/m3 (46) | 46.0 | |
| April 19, 2021, 6 a.m. | 24.8 ppb (24) | 0.9 ppb (1) | N/A | 24.0 ppb (23) | N/A | N/A | 13.0 ppb (13) | 0.47 ppb (6) | 20.0 μg/m3 (19) | 6.3 μg/m3 (27) | 27.0 | |
| April 19, 2021, 5 a.m. | 15.4 ppb (15) | 0.3 ppb (1) | N/A | 15.0 ppb (15) | N/A | N/A | 29.0 ppb (27) | 0.37 ppb (5) | 17.3 μg/m3 (17) | 2.6 μg/m3 (11) | 27.0 | |
| April 19, 2021, 4 a.m. | 10.4 ppb (10) | 0.0 ppb (0) | N/A | 10.0 ppb (10) | N/A | N/A | 40.0 ppb (38) | 0.29 ppb (4) | 13.1 μg/m3 (13) | 4.1 μg/m3 (18) | 38.0 | |
| April 19, 2021, 3 a.m. | 6.1 ppb (6) | -0.2 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 47.0 ppb (44) | 0.2 ppb (3) | 13.8 μg/m3 (13) | 3.9 μg/m3 (17) | 44.0 | |
| April 19, 2021, 2 a.m. | 5.3 ppb (5) | 0.0 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 50.0 ppb (47) | 0.2 ppb (3) | 33.4 μg/m3 (31) | 0.5 μg/m3 (3) | 47.0 | |
| April 19, 2021, 1 a.m. | 3.1 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | 0.19 ppb (3) | 23.6 μg/m3 (22) | N/A | 49.0 | |
| April 19, 2021, midnight | 3.1 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 53.0 ppb (50) | 0.17 ppb (3) | 26.1 μg/m3 (25) | -0.9 μg/m3 (0) | 50.0 | |
| April 18, 2021, 11 p.m. | 4.9 ppb (5) | 0.3 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 63.0 ppb (78) | 0.2 ppb (3) | 25.6 μg/m3 (24) | 0.5 μg/m3 (3) | 78.0 | |
| April 18, 2021, 10 p.m. | 2.5 ppb (3) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 61.0 ppb (71) | 0.17 ppb (3) | 13.8 μg/m3 (13) | N/A | 71.0 | |
| April 18, 2021, 9 p.m. | 2.1 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 60.0 ppb (68) | 0.16 ppb (3) | 15.3 μg/m3 (15) | -0.4 μg/m3 (0) | 68.0 | |
| April 18, 2021, 8 p.m. | 2.0 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 55.0 ppb (51) | 0.16 ppb (3) | 11.8 μg/m3 (11) | 2.4 μg/m3 (10) | 51.0 | |
| April 18, 2021, 7 p.m. | 1.8 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 51.0 ppb (48) | 0.15 ppb (2) | 48.9 μg/m3 (46) | 0.0 μg/m3 (0) | 48.0 | |
| April 18, 2021, 6 p.m. | 1.8 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 48.0 ppb (45) | 0.15 ppb (2) | 29.9 μg/m3 (28) | 0.3 μg/m3 (2) | 45.0 | |
| April 18, 2021, 5 p.m. | 2.2 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (43) | 0.15 ppb (2) | 65.6 μg/m3 (57) | 4.4 μg/m3 (19) | 57.0 | |
| April 18, 2021, 4 p.m. | 4.0 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (39) | 0.17 ppb (3) | 75.9 μg/m3 (62) | 5.4 μg/m3 (23) | 62.0 | |
| April 18, 2021, 3 p.m. | 28.5 ppb (27) | 10.9 ppb (11) | N/A | 18.0 ppb (17) | N/A | N/A | 15.0 ppb (14) | 0.58 ppb (7) | 38.9 μg/m3 (37) | 26.9 μg/m3 (83) | 83.0 | |
| April 18, 2021, 2 p.m. | 37.3 ppb (36) | 18.3 ppb (18) | N/A | 19.0 ppb (18) | N/A | N/A | 4.0 ppb (4) | 0.73 ppb (8) | 45.8 μg/m3 (43) | 20.5 μg/m3 (69) | 69.0 | |
| April 18, 2021, 1 p.m. | 36.7 ppb (35) | 18.1 ppb (18) | N/A | 19.0 ppb (18) | N/A | N/A | 0.0 ppb (0) | 0.75 ppb (10) | 29.3 μg/m3 (28) | 11.4 μg/m3 (48) | 48.0 | |
| April 18, 2021, noon | 27.4 ppb (26) | 7.4 ppb (7) | N/A | 20.0 ppb (19) | N/A | N/A | 0.0 ppb (0) | 0.59 ppb (7) | 35.6 μg/m3 (33) | 10.8 μg/m3 (46) | 46.0 | |
| April 18, 2021, 11 a.m. | 26.8 ppb (26) | 5.7 ppb (6) | N/A | 21.0 ppb (20) | N/A | N/A | 0.0 ppb (0) | 0.53 ppb (6) | 31.3 μg/m3 (29) | 12.7 μg/m3 (53) | 53.0 | |
| April 18, 2021, 10 a.m. | 26.4 ppb (25) | 4.2 ppb (4) | N/A | 22.0 ppb (21) | N/A | N/A | 0.0 ppb (0) | 0.59 ppb (7) | 30.5 μg/m3 (29) | 10.5 μg/m3 (44) | 44.0 | |
| April 18, 2021, 9 a.m. | 14.3 ppb (14) | 0.5 ppb (1) | N/A | 14.0 ppb (14) | N/A | N/A | 13.0 ppb (13) | 0.33 ppb (4) | 33.9 μg/m3 (32) | 10.3 μg/m3 (43) | 43.0 | |
| April 18, 2021, 8 a.m. | 16.6 ppb (16) | 0.6 ppb (1) | N/A | 16.0 ppb (16) | N/A | N/A | 11.0 ppb (11) | 0.36 ppb (5) | 32.9 μg/m3 (31) | 14.1 μg/m3 (56) | 56.0 | |
| April 18, 2021, 7 a.m. | 15.0 ppb (15) | 0.4 ppb (1) | N/A | 15.0 ppb (15) | N/A | N/A | 14.0 ppb (13) | 0.34 ppb (4) | 29.7 μg/m3 (28) | 14.4 μg/m3 (56) | 56.0 | |
| April 18, 2021, 6 a.m. | 14.2 ppb (14) | 0.3 ppb (1) | N/A | 14.0 ppb (14) | N/A | N/A | 17.0 ppb (16) | 0.3 ppb (4) | 34.9 μg/m3 (33) | 14.9 μg/m3 (57) | 57.0 | |
| April 18, 2021, 5 a.m. | 14.7 ppb (14) | 0.2 ppb (1) | N/A | 14.0 ppb (14) | N/A | N/A | 19.0 ppb (18) | 0.28 ppb (4) | 34.2 μg/m3 (32) | 16.8 μg/m3 (61) | 61.0 | |
| April 18, 2021, 4 a.m. | 15.4 ppb (15) | 0.2 ppb (1) | N/A | 15.0 ppb (15) | N/A | N/A | 21.0 ppb (20) | 0.27 ppb (4) | 32.5 μg/m3 (31) | 16.6 μg/m3 (61) | 61.0 | |
| April 18, 2021, 3 a.m. | 12.0 ppb (12) | 0.0 ppb (0) | N/A | 12.0 ppb (12) | N/A | N/A | 28.0 ppb (26) | 0.25 ppb (3) | 31.4 μg/m3 (30) | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 2 a.m. | 7.4 ppb (7) | -0.1 ppb (0) | N/A | 8.0 ppb (8) | N/A | N/A | 40.0 ppb (38) | 0.25 ppb (3) | 32.2 μg/m3 (30) | 10.3 μg/m3 (43) | 43.0 | |
| April 18, 2021, 1 a.m. | 7.1 ppb (7) | 0.3 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 44.0 ppb (41) | 0.24 ppb (3) | 27.8 μg/m3 (26) | 17.5 μg/m3 (63) | 63.0 | |
| April 18, 2021, midnight | 6.7 ppb (7) | 0.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 47.0 ppb (44) | 0.21 ppb (3) | 31.2 μg/m3 (29) | 8.0 μg/m3 (34) | 44.0 | |
| April 17, 2021, 11 p.m. | 4.2 ppb (4) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 51.0 ppb (48) | 0.19 ppb (3) | 32.6 μg/m3 (31) | 7.3 μg/m3 (31) | 48.0 | |
| April 17, 2021, 10 p.m. | 4.4 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 51.0 ppb (48) | 0.18 ppb (3) | 37.2 μg/m3 (35) | 14.6 μg/m3 (57) | 57.0 | |
| April 17, 2021, 9 p.m. | 5.0 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 53.0 ppb (50) | 0.18 ppb (3) | 30.5 μg/m3 (29) | 13.4 μg/m3 (54) | 54.0 | |
| April 17, 2021, 8 p.m. | 4.4 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 52.0 ppb (49) | 0.19 ppb (3) | 31.7 μg/m3 (30) | 11.4 μg/m3 (48) | 49.0 | |
| April 17, 2021, 7 p.m. | 3.5 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 53.0 ppb (50) | 0.2 ppb (3) | 33.1 μg/m3 (31) | 10.1 μg/m3 (43) | 50.0 | |
| April 17, 2021, 6 p.m. | 4.3 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 52.0 ppb (49) | 0.22 ppb (3) | 36.0 μg/m3 (34) | 11.0 μg/m3 (46) | 49.0 | |
| April 17, 2021, 5 p.m. | 4.4 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 44.0 ppb (41) | 0.22 ppb (3) | 33.6 μg/m3 (32) | 12.4 μg/m3 (52) | 52.0 | |
| April 17, 2021, 4 p.m. | 4.7 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 40.0 ppb (38) | 0.21 ppb (3) | 38.7 μg/m3 (36) | 11.7 μg/m3 (49) | 49.0 | |
| April 17, 2021, 3 p.m. | 4.7 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (36) | 0.2 ppb (3) | 27.8 μg/m3 (26) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 2 p.m. | 4.8 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 36.0 ppb (34) | 0.2 ppb (3) | 25.6 μg/m3 (24) | 11.2 μg/m3 (47) | 47.0 | |
| April 17, 2021, 1 p.m. | 1.7 ppb (2) | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (38) | 0.15 ppb (2) | 28.3 μg/m3 (27) | 10.8 μg/m3 (46) | 46.0 | |
| April 17, 2021, noon | 1.4 ppb (2) | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (38) | 0.15 ppb (2) | 24.4 μg/m3 (23) | 10.5 μg/m3 (44) | 44.0 | |
| April 17, 2021, 11 a.m. | 1.5 ppb (2) | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (37) | 0.15 ppb (2) | 25.9 μg/m3 (24) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 10 a.m. | 2.7 ppb (3) | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 36.0 ppb (34) | 0.16 ppb (3) | 26.6 μg/m3 (25) | 9.3 μg/m3 (39) | 39.0 | |
| April 17, 2021, 9 a.m. | 4.4 ppb (5) | -0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (31) | 0.17 ppb (3) | 26.9 μg/m3 (25) | 9.8 μg/m3 (41) | 41.0 | |
| April 17, 2021, 8 a.m. | 6.7 ppb (7) | 0.0 ppb (0) | N/A | 7.0 ppb (7) | N/A | N/A | 28.0 ppb (26) | 0.19 ppb (3) | 30.5 μg/m3 (29) | 9.5 μg/m3 (40) | 40.0 | |
| April 17, 2021, 7 a.m. | 9.1 ppb (9) | 0.1 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 25.0 ppb (24) | 0.22 ppb (3) | 26.4 μg/m3 (25) | 10.5 μg/m3 (44) | 44.0 | |
| April 17, 2021, 6 a.m. | 9.6 ppb (10) | 0.1 ppb (1) | N/A | 10.0 ppb (10) | N/A | N/A | 25.0 ppb (24) | 0.24 ppb (3) | 30.8 μg/m3 (29) | 10.5 μg/m3 (44) | 44.0 | |
| April 17, 2021, 5 a.m. | 12.3 ppb (12) | 0.1 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | 25.0 ppb (24) | 0.27 ppb (4) | 26.6 μg/m3 (25) | 10.5 μg/m3 (44) | 44.0 | |
| April 17, 2021, 4 a.m. | 11.9 ppb (12) | 0.0 ppb (0) | N/A | 12.0 ppb (12) | N/A | N/A | 26.0 ppb (25) | 0.24 ppb (3) | 24.4 μg/m3 (23) | 11.7 μg/m3 (49) | 49.0 | |
| April 17, 2021, 3 a.m. | 8.7 ppb (9) | -0.1 ppb (0) | N/A | 9.0 ppb (9) | N/A | N/A | 33.0 ppb (31) | 0.2 ppb (3) | 19.8 μg/m3 (19) | 10.3 μg/m3 (43) | 43.0 | |
| April 17, 2021, 2 a.m. | 5.3 ppb (5) | -0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 40.0 ppb (38) | 0.18 ppb (3) | 19.3 μg/m3 (18) | 8.8 μg/m3 (37) | 38.0 | |
| April 17, 2021, 1 a.m. | 5.2 ppb (5) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 41.0 ppb (38) | 0.17 ppb (3) | 26.8 μg/m3 (25) | 9.5 μg/m3 (40) | 40.0 | |
| April 17, 2021, midnight | 5.2 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (41) | 0.18 ppb (3) | 25.9 μg/m3 (24) | 10.1 μg/m3 (43) | 43.0 | |
| April 16, 2021, 11 p.m. | 5.2 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 46.0 ppb (43) | 0.18 ppb (3) | 28.5 μg/m3 (27) | 11.9 μg/m3 (50) | 50.0 | |
| April 16, 2021, 10 p.m. | 6.2 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 47.0 ppb (44) | 0.18 ppb (3) | 31.0 μg/m3 (29) | 13.9 μg/m3 (55) | 55.0 | |
| April 16, 2021, 9 p.m. | 5.1 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 52.0 ppb (49) | 0.19 ppb (3) | 33.7 μg/m3 (32) | 14.1 μg/m3 (56) | 56.0 | |
| April 16, 2021, 8 p.m. | 3.3 ppb (4) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 54.0 ppb (50) | 0.18 ppb (3) | 37.2 μg/m3 (35) | 14.1 μg/m3 (56) | 56.0 | |
| April 16, 2021, 7 p.m. | 5.5 ppb (6) | 0.8 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 50.0 ppb (47) | 0.21 ppb (3) | 40.8 μg/m3 (38) | 15.9 μg/m3 (59) | 59.0 | |
| April 16, 2021, 6 p.m. | 8.3 ppb (8) | 1.5 ppb (2) | N/A | 7.0 ppb (7) | N/A | N/A | 46.0 ppb (43) | 0.28 ppb (4) | 41.3 μg/m3 (39) | 17.3 μg/m3 (62) | 62.0 | |
| April 16, 2021, 5 p.m. | 12.9 ppb (13) | 3.0 ppb (3) | N/A | 10.0 ppb (10) | N/A | N/A | 38.0 ppb (36) | 0.32 ppb (4) | 42.3 μg/m3 (40) | 18.3 μg/m3 (65) | 65.0 | |
| April 16, 2021, 4 p.m. | 20.3 ppb (20) | 6.1 ppb (6) | N/A | 14.0 ppb (14) | N/A | N/A | 25.0 ppb (24) | 0.37 ppb (5) | 56.5 μg/m3 (52) | 22.2 μg/m3 (73) | 73.0 | |
| April 16, 2021, 3 p.m. | 25.1 ppb (24) | 8.5 ppb (9) | N/A | 17.0 ppb (17) | N/A | N/A | 17.0 ppb (16) | 0.39 ppb (5) | 50.8 μg/m3 (48) | 24.9 μg/m3 (78) | 78.0 | |
| April 16, 2021, 2 p.m. | 17.4 ppb (17) | 3.3 ppb (4) | N/A | 14.0 ppb (14) | N/A | N/A | 17.0 ppb (16) | 0.33 ppb (4) | 38.0 μg/m3 (36) | 17.8 μg/m3 (63) | 63.0 | |
| April 16, 2021, 1 p.m. | 41.7 ppb (40) | 16.0 ppb (16) | N/A | 26.0 ppb (25) | N/A | N/A | 0.0 ppb (0) | 0.52 ppb (6) | 43.8 μg/m3 (41) | 8.0 μg/m3 (34) | 41.0 | |
| April 16, 2021, noon | 45.4 ppb (43) | 19.3 ppb (19) | N/A | 26.0 ppb (25) | N/A | N/A | -1.0 ppb (0) | 0.42 ppb (5) | 34.0 μg/m3 (32) | 7.5 μg/m3 (32) | 43.0 | |
| April 16, 2021, 11 a.m. | 19.4 ppb (19) | 2.4 ppb (3) | N/A | 17.0 ppb (17) | N/A | N/A | 6.0 ppb (6) | 0.33 ppb (4) | 30.1 μg/m3 (28) | 7.0 μg/m3 (30) | 30.0 | |
| April 16, 2021, 10 a.m. | 11.6 ppb (11) | 0.3 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 13.0 ppb (13) | 0.27 ppb (4) | 27.6 μg/m3 (26) | 9.3 μg/m3 (39) | 39.0 | |
| April 16, 2021, 9 a.m. | 15.1 ppb (15) | 0.5 ppb (1) | N/A | 15.0 ppb (15) | N/A | N/A | 13.0 ppb (13) | 0.32 ppb (4) | 27.8 μg/m3 (26) | 9.8 μg/m3 (41) | 41.0 | |
| April 16, 2021, 8 a.m. | 12.0 ppb (12) | 0.3 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | 18.0 ppb (17) | 0.29 ppb (4) | 30.3 μg/m3 (29) | 10.5 μg/m3 (44) | 44.0 | |
| April 16, 2021, 7 a.m. | 12.9 ppb (13) | 0.3 ppb (1) | N/A | 13.0 ppb (13) | N/A | N/A | 24.0 ppb (23) | 0.3 ppb (4) | 32.7 μg/m3 (31) | 13.1 μg/m3 (54) | 54.0 | |
| April 16, 2021, 6 a.m. | 11.9 ppb (12) | 0.2 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | 27.0 ppb (25) | 0.29 ppb (4) | 30.8 μg/m3 (29) | 11.2 μg/m3 (47) | 47.0 | |
| April 16, 2021, 5 a.m. | 10.0 ppb (10) | 0.1 ppb (1) | N/A | 10.0 ppb (10) | N/A | N/A | 28.0 ppb (26) | 0.24 ppb (3) | 30.5 μg/m3 (29) | 10.9 μg/m3 (46) | 46.0 | |
| April 16, 2021, 4 a.m. | 13.9 ppb (14) | 0.1 ppb (1) | N/A | 14.0 ppb (14) | N/A | N/A | 23.0 ppb (22) | 0.23 ppb (3) | 33.7 μg/m3 (32) | 11.2 μg/m3 (47) | 47.0 | |
| April 16, 2021, 3 a.m. | 11.6 ppb (11) | 0.0 ppb (0) | N/A | 12.0 ppb (12) | N/A | N/A | 27.0 ppb (25) | 0.23 ppb (3) | 27.8 μg/m3 (26) | 9.8 μg/m3 (41) | 41.0 | |
| April 16, 2021, 2 a.m. | 6.6 ppb (7) | -0.1 ppb (0) | N/A | 7.0 ppb (7) | N/A | N/A | 36.0 ppb (34) | 0.18 ppb (3) | 22.7 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| April 16, 2021, 1 a.m. | 7.9 ppb (8) | 0.4 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 38.0 ppb (36) | 0.19 ppb (3) | 30.8 μg/m3 (29) | 10.9 μg/m3 (46) | 46.0 | |
| April 16, 2021, midnight | 8.7 ppb (9) | 1.2 ppb (2) | N/A | 8.0 ppb (8) | N/A | N/A | 41.0 ppb (38) | 0.19 ppb (3) | 41.9 μg/m3 (39) | 8.8 μg/m3 (37) | 39.0 | |
| April 15, 2021, 11 p.m. | 6.2 ppb (6) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 47.0 ppb (44) | 0.18 ppb (3) | 44.6 μg/m3 (42) | 8.8 μg/m3 (37) | 44.0 | |
| April 15, 2021, 10 p.m. | 4.5 ppb (5) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 49.0 ppb (46) | 0.18 ppb (3) | 32.9 μg/m3 (31) | 8.5 μg/m3 (36) | 46.0 | |
| April 15, 2021, 9 p.m. | 4.2 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 50.0 ppb (47) | 0.18 ppb (3) | 31.9 μg/m3 (30) | 15.3 μg/m3 (58) | 58.0 | |
| April 15, 2021, 8 p.m. | 4.2 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 49.0 ppb (46) | 0.17 ppb (3) | 28.5 μg/m3 (27) | 10.0 μg/m3 (42) | 46.0 | |
| April 15, 2021, 7 p.m. | 4.8 ppb (5) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 48.0 ppb (45) | 0.18 ppb (3) | 38.9 μg/m3 (37) | 6.6 μg/m3 (28) | 45.0 | |
| April 15, 2021, 6 p.m. | 5.3 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 46.0 ppb (43) | 0.22 ppb (3) | 39.6 μg/m3 (37) | 15.1 μg/m3 (58) | 58.0 | |
| April 15, 2021, 5 p.m. | 5.8 ppb (6) | 1.4 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 43.0 ppb (40) | 0.22 ppb (3) | 37.9 μg/m3 (36) | 13.9 μg/m3 (55) | 55.0 | |
| April 15, 2021, 4 p.m. | 6.2 ppb (6) | 1.3 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 40.0 ppb (38) | 0.21 ppb (3) | 27.5 μg/m3 (26) | 17.6 μg/m3 (63) | 63.0 | |
| April 15, 2021, 3 p.m. | 17.8 ppb (17) | 4.7 ppb (5) | N/A | 13.0 ppb (13) | N/A | N/A | 25.0 ppb (24) | 0.32 ppb (4) | 33.4 μg/m3 (31) | 10.5 μg/m3 (44) | 44.0 | |
| April 15, 2021, 2 p.m. | 21.2 ppb (20) | 4.6 ppb (5) | N/A | 17.0 ppb (17) | N/A | N/A | 19.0 ppb (18) | 0.38 ppb (5) | 24.2 μg/m3 (23) | 9.0 μg/m3 (38) | 38.0 | |
| April 15, 2021, 1 p.m. | 35.2 ppb (34) | 7.7 ppb (8) | N/A | 28.0 ppb (27) | N/A | N/A | 6.0 ppb (6) | 0.41 ppb (5) | 31.7 μg/m3 (30) | 8.8 μg/m3 (37) | 37.0 | |
| April 15, 2021, noon | 40.6 ppb (39) | 9.6 ppb (10) | N/A | 31.0 ppb (30) | N/A | N/A | 0.0 ppb (0) | 0.45 ppb (6) | 22.0 μg/m3 (21) | 9.0 μg/m3 (38) | 39.0 | |
| April 15, 2021, 11 a.m. | 23.4 ppb (23) | 1.3 ppb (2) | N/A | 22.0 ppb (21) | N/A | N/A | 9.0 ppb (9) | 0.32 ppb (4) | 26.9 μg/m3 (25) | 6.8 μg/m3 (29) | 29.0 | |
| April 15, 2021, 10 a.m. | 16.5 ppb (16) | 0.8 ppb (1) | N/A | 16.0 ppb (16) | N/A | N/A | 16.0 ppb (15) | 0.3 ppb (4) | 29.3 μg/m3 (28) | 6.5 μg/m3 (28) | 28.0 | |
| April 15, 2021, 9 a.m. | 14.5 ppb (14) | 0.2 ppb (1) | N/A | 14.0 ppb (14) | N/A | N/A | 19.0 ppb (18) | 0.28 ppb (4) | 18.6 μg/m3 (18) | 5.8 μg/m3 (25) | 25.0 | |
| April 15, 2021, 8 a.m. | 12.8 ppb (13) | 0.1 ppb (1) | N/A | 13.0 ppb (13) | N/A | N/A | 22.0 ppb (21) | 0.29 ppb (4) | 23.5 μg/m3 (22) | 5.3 μg/m3 (23) | 23.0 | |
| April 15, 2021, 7 a.m. | 6.7 ppb (7) | -0.1 ppb (0) | N/A | 7.0 ppb (7) | N/A | N/A | 32.0 ppb (30) | 0.23 ppb (3) | 24.7 μg/m3 (23) | 6.8 μg/m3 (29) | 30.0 | |
| April 15, 2021, 6 a.m. | 5.6 ppb (6) | -0.1 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 35.0 ppb (33) | 0.21 ppb (3) | 25.9 μg/m3 (24) | 7.5 μg/m3 (32) | 33.0 | |
| April 15, 2021, 5 a.m. | 6.0 ppb (6) | -0.2 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 36.0 ppb (34) | 0.21 ppb (3) | 16.6 μg/m3 (16) | 8.3 μg/m3 (35) | 35.0 | |
| April 15, 2021, 4 a.m. | 4.4 ppb (5) | -0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 39.0 ppb (37) | 0.19 ppb (3) | 21.0 μg/m3 (20) | 7.8 μg/m3 (33) | 37.0 | |
| April 15, 2021, 3 a.m. | 3.6 ppb (4) | -0.3 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 41.0 ppb (38) | 0.17 ppb (3) | 19.8 μg/m3 (19) | 6.5 μg/m3 (28) | 38.0 | |
| April 15, 2021, 2 a.m. | 2.6 ppb (3) | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 44.0 ppb (41) | 0.16 ppb (3) | 16.8 μg/m3 (16) | 6.8 μg/m3 (29) | 41.0 | |
| April 15, 2021, 1 a.m. | 2.3 ppb (3) | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 45.0 ppb (42) | 0.16 ppb (3) | 20.6 μg/m3 (20) | 9.3 μg/m3 (39) | 42.0 | |
| April 15, 2021, midnight | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 46.0 ppb (43) | 0.16 ppb (3) | 23.4 μg/m3 (22) | 10.5 μg/m3 (44) | 44.0 | |
| April 14, 2021, 11 p.m. | 1.4 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 48.0 ppb (45) | 0.16 ppb (3) | 18.6 μg/m3 (18) | 8.3 μg/m3 (35) | 45.0 | |
| April 14, 2021, 10 p.m. | 1.5 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 48.0 ppb (45) | 0.16 ppb (3) | 19.5 μg/m3 (19) | 7.8 μg/m3 (33) | 45.0 | |
| April 14, 2021, 9 p.m. | 1.2 ppb (2) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 49.0 ppb (46) | 0.16 ppb (3) | 26.1 μg/m3 (25) | 10.8 μg/m3 (46) | 46.0 | |
| April 14, 2021, 8 p.m. | 1.0 ppb (1) | 0.0 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 49.0 ppb (46) | 0.16 ppb (3) | 17.5 μg/m3 (17) | 10.1 μg/m3 (43) | 46.0 | |
| April 14, 2021, 7 p.m. | 1.6 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 48.0 ppb (45) | 0.16 ppb (3) | 22.0 μg/m3 (21) | 8.5 μg/m3 (36) | 45.0 | |
| April 14, 2021, 6 p.m. | 1.7 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 ppb (44) | 0.16 ppb (3) | 23.7 μg/m3 (22) | 8.5 μg/m3 (36) | 44.0 | |
| April 14, 2021, 5 p.m. | 2.6 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 45.0 ppb (42) | 0.17 ppb (3) | 25.3 μg/m3 (24) | 7.8 μg/m3 (33) | 42.0 | |
| April 14, 2021, 4 p.m. | 3.8 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (39) | 0.17 ppb (3) | 23.0 μg/m3 (22) | 8.5 μg/m3 (36) | 39.0 | |
| April 14, 2021, 3 p.m. | 6.9 ppb (7) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 39.0 ppb (37) | 0.19 ppb (3) | 26.1 μg/m3 (25) | 7.3 μg/m3 (31) | 37.0 | |
| April 14, 2021, 2 p.m. | 12.3 ppb (12) | 1.0 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 30.0 ppb (28) | 0.25 ppb (3) | 24.6 μg/m3 (23) | 5.8 μg/m3 (25) | 28.0 | |
| April 14, 2021, 1 p.m. | 8.6 ppb (9) | 0.0 ppb (0) | N/A | 9.0 ppb (9) | N/A | N/A | 33.0 ppb (31) | 0.22 ppb (3) | 20.3 μg/m3 (19) | 6.5 μg/m3 (28) | 31.0 | |
| April 14, 2021, noon | 4.4 ppb (5) | -0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 36.0 ppb (34) | 0.17 ppb (3) | 23.2 μg/m3 (22) | 8.8 μg/m3 (37) | 37.0 | |
| April 14, 2021, 11 a.m. | 4.7 ppb (5) | -0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 35.0 ppb (33) | 0.17 ppb (3) | 19.1 μg/m3 (18) | 10.1 μg/m3 (43) | 43.0 | |
| April 14, 2021, 10 a.m. | 5.2 ppb (5) | -0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 35.0 ppb (33) | 0.16 ppb (3) | 21.3 μg/m3 (20) | 8.3 μg/m3 (35) | 35.0 | |
| April 14, 2021, 9 a.m. | 3.9 ppb (4) | -0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 39.0 ppb (37) | 0.15 ppb (2) | 11.9 μg/m3 (12) | 7.8 μg/m3 (33) | 37.0 | |
| April 14, 2021, 8 a.m. | 2.9 ppb (3) | -0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (38) | 0.15 ppb (2) | 16.3 μg/m3 (16) | 7.3 μg/m3 (31) | 38.0 | |
| April 14, 2021, 7 a.m. | 4.0 ppb (4) | -0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (36) | 0.15 ppb (2) | 7.9 μg/m3 (8) | 6.8 μg/m3 (29) | 36.0 | |
| April 14, 2021, 6 a.m. | 3.5 ppb (4) | -0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (36) | 0.17 ppb (3) | 16.6 μg/m3 (16) | 15.3 μg/m3 (58) | 58.0 | |
| April 14, 2021, 5 a.m. | 5.0 ppb (5) | -0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 37.0 ppb (35) | 0.18 ppb (3) | 17.1 μg/m3 (16) | 8.8 μg/m3 (37) | 37.0 | |
| April 14, 2021, 4 a.m. | 6.9 ppb (7) | -0.1 ppb (0) | N/A | 7.0 ppb (7) | N/A | N/A | 35.0 ppb (33) | 0.18 ppb (3) | 17.8 μg/m3 (17) | 9.3 μg/m3 (39) | 39.0 | |
| April 14, 2021, 3 a.m. | 6.7 ppb (7) | -0.2 ppb (0) | N/A | 7.0 ppb (7) | N/A | N/A | 36.0 ppb (34) | 0.17 ppb (3) | 11.0 μg/m3 (11) | 10.0 μg/m3 (42) | 42.0 | |
| April 14, 2021, 2 a.m. | 3.5 ppb (4) | -0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 39.0 ppb (37) | 0.18 ppb (3) | 9.3 μg/m3 (9) | 4.8 μg/m3 (20) | 37.0 | |
| April 14, 2021, 1 a.m. | 2.7 ppb (3) | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 41.0 ppb (38) | 0.17 ppb (3) | 15.1 μg/m3 (14) | 2.4 μg/m3 (10) | 38.0 | |
| April 14, 2021, midnight | 2.0 ppb (2) | -0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | 0.17 ppb (3) | 3.2 μg/m3 (3) | 6.8 μg/m3 (29) | 38.0 | |
| April 13, 2021, 11 p.m. | 1.6 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | 0.16 ppb (3) | 6.1 μg/m3 (6) | 5.8 μg/m3 (25) | 38.0 | |
| April 13, 2021, 10 p.m. | 1.5 ppb (2) | 0.0 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (39) | 0.16 ppb (3) | 9.8 μg/m3 (10) | 2.2 μg/m3 (10) | 39.0 | |
| April 13, 2021, 9 p.m. | 2.0 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (39) | 0.17 ppb (3) | 13.8 μg/m3 (13) | 4.9 μg/m3 (21) | 39.0 | |
| April 13, 2021, 8 p.m. | 2.1 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 44.0 ppb (41) | 0.17 ppb (3) | 7.6 μg/m3 (8) | 7.3 μg/m3 (31) | 41.0 | |
| April 13, 2021, 7 p.m. | 2.0 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (40) | 0.17 ppb (3) | 15.6 μg/m3 (15) | 7.8 μg/m3 (33) | 40.0 | |
| April 13, 2021, 6 p.m. | 2.1 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (39) | 0.17 ppb (3) | 18.8 μg/m3 (18) | 15.6 μg/m3 (59) | 59.0 | |
| April 13, 2021, 5 p.m. | 2.1 ppb (2) | 0.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | 0.17 ppb (3) | 16.1 μg/m3 (15) | 6.6 μg/m3 (28) | 38.0 | |
| April 13, 2021, 4 p.m. | 2.5 ppb (3) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (38) | 0.17 ppb (3) | 23.2 μg/m3 (22) | 8.5 μg/m3 (36) | 38.0 | |
| April 13, 2021, 3 p.m. | 4.3 ppb (5) | 0.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | 0.2 ppb (3) | 24.9 μg/m3 (24) | 8.0 μg/m3 (34) | 35.0 | |
| April 13, 2021, 2 p.m. | 7.0 ppb (7) | 0.2 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 33.0 ppb (31) | 0.2 ppb (3) | 23.9 μg/m3 (23) | 9.8 μg/m3 (41) | 41.0 | |
| April 13, 2021, 1 p.m. | 4.9 ppb (5) | -0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 35.0 ppb (33) | 0.18 ppb (3) | 21.0 μg/m3 (20) | 8.8 μg/m3 (37) | 37.0 | |
| April 13, 2021, noon | 2.8 ppb (3) | -0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 37.0 ppb (35) | 0.17 ppb (3) | 18.8 μg/m3 (18) | 7.8 μg/m3 (33) | 35.0 | |
| April 13, 2021, 11 a.m. | 2.2 ppb (3) | -0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (36) | 0.16 ppb (3) | 18.6 μg/m3 (18) | 7.8 μg/m3 (33) | 36.0 | |
| April 13, 2021, 10 a.m. | 2.6 ppb (3) | -0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (36) | 0.15 ppb (2) | 21.8 μg/m3 (21) | 5.8 μg/m3 (25) | 36.0 | |
| April 13, 2021, 9 a.m. | 1.1 ppb (2) | -0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 43.0 ppb (40) | 0.16 ppb (3) | 17.3 μg/m3 (17) | 7.8 μg/m3 (33) | 40.0 |