Rumford (Rumford) RI, US: 41.840302, -71.361702
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 21, 2021, 6 p.m. | 4.0 ppb (4) | 0.3 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | 3.6 ppb (4) | 0.0 ppb (0) | 48.0 ppb (45) | 0.17 ppb (3) | N/A | N/A | 45.0 | |
| April 21, 2021, 5 p.m. | 2.8 ppb (3) | 0.3 ppb (1) | 2.8 ppb (3) | 3.0 ppb (3) | 2.5 ppb (3) | 0.0 ppb (0) | N/A | 0.18 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 21, 2021, 4 p.m. | 2.1 ppb (2) | 0.4 ppb (1) | 2.3 ppb (3) | 2.0 ppb (2) | 1.9 ppb (2) | 0.0 ppb (0) | N/A | 0.17 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 21, 2021, 3 p.m. | 1.9 ppb (2) | 0.4 ppb (1) | 2.2 ppb (3) | 2.0 ppb (2) | 1.9 ppb (2) | 0.0 ppb (0) | N/A | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 21, 2021, 2 p.m. | 2.4 ppb (3) | 0.4 ppb (1) | 2.6 ppb (3) | 2.0 ppb (2) | 2.2 ppb (3) | 0.0 ppb (0) | N/A | 0.18 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 21, 2021, 1 p.m. | 3.1 ppb (3) | 0.5 ppb (1) | 3.1 ppb (3) | 3.0 ppb (3) | 2.5 ppb (3) | 0.0 ppb (0) | 48.0 ppb (45) | 0.17 ppb (3) | N/A | 9.0 μg/m3 (38) | 45.0 | |
| April 21, 2021, noon | 4.3 ppb (5) | 0.6 ppb (1) | 4.4 ppb (5) | 4.0 ppb (4) | 3.7 ppb (4) | 0.0 ppb (0) | 46.0 ppb (43) | 0.19 ppb (3) | N/A | 9.0 μg/m3 (38) | 43.0 | |
| April 21, 2021, 11 a.m. | 6.0 ppb (6) | 0.6 ppb (1) | 5.9 ppb (6) | 5.0 ppb (5) | 5.3 ppb (5) | 0.0 ppb (0) | 44.0 ppb (41) | 0.19 ppb (3) | N/A | 7.0 μg/m3 (30) | 41.0 | |
| April 21, 2021, 10 a.m. | 8.2 ppb (8) | 0.6 ppb (1) | 8.7 ppb (9) | 8.0 ppb (8) | 7.8 ppb (8) | 0.0 ppb (0) | 40.0 ppb (38) | 0.2 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 21, 2021, 9 a.m. | 6.8 ppb (7) | 0.1 ppb (1) | 6.5 ppb (7) | 7.0 ppb (7) | 6.3 ppb (6) | 0.0 ppb (0) | 42.0 ppb (39) | 0.18 ppb (3) | N/A | 8.0 μg/m3 (34) | 39.0 | |
| April 21, 2021, 8 a.m. | 5.8 ppb (6) | 0.2 ppb (1) | 5.1 ppb (5) | 6.0 ppb (6) | 4.9 ppb (5) | 0.0 ppb (0) | 45.0 ppb (42) | 0.17 ppb (3) | N/A | 8.0 μg/m3 (34) | 42.0 | |
| April 21, 2021, 7 a.m. | 3.5 ppb (4) | 0.1 ppb (1) | 3.3 ppb (4) | 3.0 ppb (3) | 3.2 ppb (4) | 0.0 ppb (0) | 49.0 ppb (46) | 0.16 ppb (3) | N/A | 7.0 μg/m3 (30) | 46.0 | |
| April 21, 2021, 6 a.m. | 3.8 ppb (4) | 0.0 ppb (0) | 3.5 ppb (4) | 4.0 ppb (4) | 3.5 ppb (4) | 0.0 ppb (0) | 48.0 ppb (45) | 0.17 ppb (3) | N/A | 9.0 μg/m3 (38) | 45.0 | |
| April 21, 2021, 5 a.m. | 4.0 ppb (4) | 0.1 ppb (1) | 4.3 ppb (5) | 4.0 ppb (4) | 3.9 ppb (4) | 0.0 ppb (0) | 47.0 ppb (44) | 0.17 ppb (3) | N/A | 9.0 μg/m3 (38) | 44.0 | |
| April 21, 2021, 4 a.m. | 3.9 ppb (4) | 0.1 ppb (1) | 3.5 ppb (4) | 4.0 ppb (4) | 3.4 ppb (4) | 0.0 ppb (0) | 46.0 ppb (43) | 0.17 ppb (3) | N/A | 7.0 μg/m3 (30) | 43.0 | |
| April 21, 2021, 3 a.m. | 5.0 ppb (5) | 0.1 ppb (1) | 4.4 ppb (5) | 5.0 ppb (5) | 4.3 ppb (5) | 0.0 ppb (0) | 46.0 ppb (43) | 0.18 ppb (3) | N/A | 6.0 μg/m3 (25) | 43.0 | |
| April 21, 2021, 2 a.m. | 4.5 ppb (5) | 0.1 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 49.0 ppb (46) | 0.18 ppb (3) | N/A | 9.0 μg/m3 (38) | 46.0 | |
| April 21, 2021, 1 a.m. | 3.9 ppb (4) | 0.1 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 53.0 ppb (50) | 0.18 ppb (3) | N/A | 10.0 μg/m3 (42) | 50.0 | |
| April 21, 2021, midnight | 4.5 ppb (5) | 0.1 ppb (1) | 4.4 ppb (5) | 4.0 ppb (4) | 4.3 ppb (5) | 0.0 ppb (0) | 53.0 ppb (50) | 0.19 ppb (3) | N/A | 9.0 μg/m3 (38) | 50.0 | |
| April 20, 2021, 11 p.m. | 4.4 ppb (5) | 0.1 ppb (1) | 4.3 ppb (5) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 56.0 ppb (55) | 0.18 ppb (3) | N/A | 9.0 μg/m3 (38) | 55.0 | |
| April 20, 2021, 10 p.m. | 3.8 ppb (4) | 0.1 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 61.0 ppb (71) | 0.18 ppb (3) | N/A | 8.0 μg/m3 (34) | 71.0 | |
| April 20, 2021, 9 p.m. | 4.6 ppb (5) | 0.3 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | 4.7 ppb (5) | 0.0 ppb (0) | 61.0 ppb (71) | 0.2 ppb (3) | N/A | 10.0 μg/m3 (42) | 71.0 | |
| April 20, 2021, 8 p.m. | 5.6 ppb (6) | 0.7 ppb (1) | 5.8 ppb (6) | 5.0 ppb (5) | 5.2 ppb (5) | 0.0 ppb (0) | 60.0 ppb (68) | 0.22 ppb (3) | N/A | 9.0 μg/m3 (38) | 68.0 | |
| April 20, 2021, 7 p.m. | 6.1 ppb (6) | 0.7 ppb (1) | 6.4 ppb (7) | 5.0 ppb (5) | 5.7 ppb (6) | 0.0 ppb (0) | 59.0 ppb (65) | 0.19 ppb (3) | N/A | 8.0 μg/m3 (34) | 65.0 | |
| April 20, 2021, 6 p.m. | 7.5 ppb (8) | 0.9 ppb (1) | 7.8 ppb (8) | 7.0 ppb (7) | 6.9 ppb (7) | 0.0 ppb (0) | 56.0 ppb (55) | 0.19 ppb (3) | N/A | 9.0 μg/m3 (38) | 55.0 | |
| April 20, 2021, 5 p.m. | 6.5 ppb (7) | 1.1 ppb (2) | 6.7 ppb (7) | 5.0 ppb (5) | 5.7 ppb (6) | 0.0 ppb (0) | 56.0 ppb (55) | 0.18 ppb (3) | N/A | 10.0 μg/m3 (42) | 55.0 | |
| April 20, 2021, 4 p.m. | 5.1 ppb (5) | 0.9 ppb (1) | 5.4 ppb (6) | 4.0 ppb (4) | 4.5 ppb (5) | 0.0 ppb (0) | 56.0 ppb (55) | 0.17 ppb (3) | N/A | 10.0 μg/m3 (42) | 55.0 | |
| April 20, 2021, 3 p.m. | 4.9 ppb (5) | 0.9 ppb (1) | 4.9 ppb (5) | 4.0 ppb (4) | 4.1 ppb (4) | 0.0 ppb (0) | 52.0 ppb (49) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 49.0 | |
| April 20, 2021, 2 p.m. | 6.7 ppb (7) | 1.5 ppb (2) | 6.5 ppb (7) | 5.0 ppb (5) | 5.1 ppb (5) | 0.0 ppb (0) | 47.0 ppb (44) | 0.17 ppb (3) | N/A | 6.0 μg/m3 (25) | 44.0 | |
| April 20, 2021, 1 p.m. | 20.5 ppb (20) | 7.4 ppb (7) | 19.9 ppb (19) | 13.0 ppb (13) | 12.5 ppb (12) | 0.0 ppb (0) | 32.0 ppb (30) | 0.26 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 20, 2021, noon | 32.1 ppb (31) | 11.7 ppb (12) | 33.1 ppb (32) | 20.0 ppb (19) | 21.2 ppb (20) | 1.0 ppb (2) | 19.0 ppb (18) | 0.36 ppb (5) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 11 a.m. | 41.0 ppb (39) | 18.0 ppb (17) | 43.5 ppb (42) | 23.0 ppb (22) | 24.6 ppb (24) | 0.0 ppb (0) | 9.0 ppb (9) | 0.38 ppb (5) | N/A | 7.0 μg/m3 (30) | 42.0 | |
| April 20, 2021, 10 a.m. | 33.8 ppb (32) | 16.3 ppb (16) | 39.8 ppb (38) | 18.0 ppb (17) | 22.9 ppb (22) | 0.0 ppb (0) | 2.0 ppb (2) | 0.34 ppb (4) | N/A | 8.0 μg/m3 (34) | 38.0 | |
| April 20, 2021, 9 a.m. | 25.9 ppb (25) | 4.1 ppb (4) | 31.0 ppb (30) | 22.0 ppb (21) | 26.9 ppb (26) | 0.0 ppb (0) | N/A | 0.29 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 20, 2021, 8 a.m. | 21.2 ppb (20) | 0.6 ppb (1) | 27.6 ppb (27) | 21.0 ppb (20) | 22.9 ppb (22) | 0.0 ppb (0) | 8.0 ppb (8) | 0.26 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 20, 2021, 7 a.m. | 20.4 ppb (20) | 0.7 ppb (1) | 23.1 ppb (22) | 20.0 ppb (19) | 22.2 ppb (21) | 0.0 ppb (0) | 8.0 ppb (8) | 0.27 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 20, 2021, 6 a.m. | 15.5 ppb (15) | 0.2 ppb (1) | 20.9 ppb (20) | 15.0 ppb (15) | 20.5 ppb (20) | 0.0 ppb (0) | 14.0 ppb (13) | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 5 a.m. | 12.3 ppb (12) | 0.1 ppb (1) | 14.2 ppb (14) | 12.0 ppb (12) | 13.8 ppb (14) | 0.0 ppb (0) | 23.0 ppb (22) | 0.24 ppb (3) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 20, 2021, 4 a.m. | 13.6 ppb (13) | 0.1 ppb (1) | 13.3 ppb (13) | 14.0 ppb (14) | 13.2 ppb (13) | 0.0 ppb (0) | 27.0 ppb (25) | 0.26 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 3 a.m. | 7.8 ppb (8) | 0.0 ppb (0) | 7.7 ppb (8) | 8.0 ppb (8) | 7.6 ppb (8) | 0.0 ppb (0) | 35.0 ppb (33) | 0.2 ppb (3) | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 20, 2021, 2 a.m. | 8.2 ppb (8) | 0.1 ppb (1) | N/A | 8.0 ppb (8) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.22 ppb (3) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| April 20, 2021, 1 a.m. | 10.7 ppb (11) | 0.1 ppb (1) | 10.7 ppb (11) | 11.0 ppb (11) | 10.6 ppb (10) | 0.0 ppb (0) | 32.0 ppb (30) | 0.21 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 20, 2021, midnight | 6.9 ppb (7) | 0.1 ppb (1) | 7.0 ppb (7) | 7.0 ppb (7) | 6.9 ppb (7) | 0.0 ppb (0) | 38.0 ppb (36) | 0.17 ppb (3) | N/A | 5.0 μg/m3 (21) | 36.0 | |
| April 19, 2021, 11 p.m. | 4.3 ppb (5) | 0.1 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | 3.9 ppb (4) | 0.0 ppb (0) | 43.0 ppb (40) | 0.17 ppb (3) | N/A | 7.0 μg/m3 (30) | 40.0 | |
| April 19, 2021, 10 p.m. | 4.2 ppb (4) | 0.2 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | 3.7 ppb (4) | 0.0 ppb (0) | 42.0 ppb (39) | 0.17 ppb (3) | N/A | 8.0 μg/m3 (34) | 39.0 | |
| April 19, 2021, 9 p.m. | 2.9 ppb (3) | 0.4 ppb (1) | 2.7 ppb (3) | 3.0 ppb (3) | 2.3 ppb (3) | 0.0 ppb (0) | 43.0 ppb (40) | 0.17 ppb (3) | N/A | 8.0 μg/m3 (34) | 40.0 | |
| April 19, 2021, 8 p.m. | 2.2 ppb (3) | 0.3 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | 1.7 ppb (2) | 0.0 ppb (0) | 45.0 ppb (42) | 0.16 ppb (3) | N/A | 6.0 μg/m3 (25) | 42.0 | |
| April 19, 2021, 7 p.m. | 2.5 ppb (3) | 0.4 ppb (1) | 2.2 ppb (3) | 2.0 ppb (2) | 1.8 ppb (2) | 0.0 ppb (0) | 44.0 ppb (41) | 0.16 ppb (3) | N/A | 4.0 μg/m3 (17) | 41.0 | |
| April 19, 2021, 6 p.m. | 2.8 ppb (3) | 0.5 ppb (1) | 2.6 ppb (3) | 2.0 ppb (2) | 2.1 ppb (2) | 0.0 ppb (0) | 44.0 ppb (41) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 41.0 | |
| April 19, 2021, 5 p.m. | 2.7 ppb (3) | 0.4 ppb (1) | 2.5 ppb (3) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 44.0 ppb (41) | 0.15 ppb (2) | N/A | 5.0 μg/m3 (21) | 41.0 | |
| April 19, 2021, 4 p.m. | 2.3 ppb (3) | 0.4 ppb (1) | 2.1 ppb (2) | 2.0 ppb (2) | 1.7 ppb (2) | 0.0 ppb (0) | 42.0 ppb (39) | 0.15 ppb (2) | N/A | 6.0 μg/m3 (25) | 39.0 | |
| April 19, 2021, 3 p.m. | 2.3 ppb (3) | 0.5 ppb (1) | 2.1 ppb (2) | 2.0 ppb (2) | 1.6 ppb (2) | 0.0 ppb (0) | 40.0 ppb (38) | 0.15 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 2 p.m. | 3.4 ppb (4) | 1.0 ppb (1) | 3.2 ppb (4) | 2.0 ppb (2) | 2.3 ppb (3) | 0.0 ppb (0) | 36.0 ppb (34) | 0.17 ppb (3) | N/A | 6.0 μg/m3 (25) | 34.0 | |
| April 19, 2021, 1 p.m. | 6.5 ppb (7) | 2.1 ppb (2) | 6.4 ppb (7) | 4.0 ppb (4) | 4.3 ppb (5) | 0.0 ppb (0) | 30.0 ppb (28) | 0.19 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, noon | 28.6 ppb (27) | 13.8 ppb (14) | 29.1 ppb (28) | 15.0 ppb (15) | 15.1 ppb (15) | 0.0 ppb (0) | 17.0 ppb (16) | 0.36 ppb (5) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 19, 2021, 11 a.m. | 44.8 ppb (43) | 26.3 ppb (25) | 46.4 ppb (44) | 19.0 ppb (18) | 21.2 ppb (20) | 0.0 ppb (0) | 5.0 ppb (5) | 0.56 ppb (7) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 19, 2021, 10 a.m. | 40.5 ppb (39) | 24.1 ppb (23) | 54.6 ppb (52) | 16.0 ppb (16) | 23.4 ppb (23) | 0.0 ppb (0) | 2.0 ppb (2) | 0.44 ppb (5) | N/A | 9.0 μg/m3 (38) | 52.0 | |
| April 19, 2021, 9 a.m. | 32.6 ppb (31) | 11.0 ppb (11) | 34.5 ppb (33) | 22.0 ppb (21) | 27.9 ppb (27) | 0.0 ppb (0) | 1.0 ppb (1) | 0.38 ppb (5) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 8 a.m. | 26.6 ppb (26) | 5.8 ppb (6) | 26.3 ppb (25) | 21.0 ppb (20) | 22.2 ppb (21) | 0.0 ppb (0) | 2.0 ppb (2) | 0.36 ppb (5) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 7 a.m. | 20.4 ppb (20) | 2.1 ppb (2) | 25.6 ppb (25) | 18.0 ppb (17) | 21.5 ppb (21) | 0.0 ppb (0) | 3.0 ppb (3) | 0.34 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 6 a.m. | N/A | N/A | 25.6 ppb (25) | N/A | 20.4 ppb (20) | N/A | 4.0 ppb (4) | N/A | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 19, 2021, 5 a.m. | N/A | N/A | 24.2 ppb (23) | N/A | 23.5 ppb (23) | N/A | 9.0 ppb (9) | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 4 a.m. | 18.6 ppb (18) | 0.8 ppb (1) | 20.8 ppb (20) | 18.0 ppb (17) | 19.6 ppb (19) | 0.0 ppb (0) | 16.0 ppb (15) | 0.34 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| April 19, 2021, 3 a.m. | 16.1 ppb (16) | 0.8 ppb (1) | 16.6 ppb (16) | 15.0 ppb (15) | 15.8 ppb (15) | 0.0 ppb (0) | 16.0 ppb (15) | 0.32 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| April 19, 2021, 2 a.m. | 16.2 ppb (16) | 0.7 ppb (1) | 15.3 ppb (15) | 16.0 ppb (16) | 14.2 ppb (14) | 0.0 ppb (0) | 16.0 ppb (15) | 0.32 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 1 a.m. | 12.6 ppb (12) | 0.2 ppb (1) | 13.2 ppb (13) | 13.0 ppb (13) | 12.9 ppb (13) | 0.0 ppb (0) | 25.0 ppb (24) | 0.25 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, midnight | 7.8 ppb (8) | 0.1 ppb (1) | 7.8 ppb (8) | 8.0 ppb (8) | 7.5 ppb (8) | 0.0 ppb (0) | 33.0 ppb (31) | 0.21 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 18, 2021, 11 p.m. | 2.7 ppb (3) | 0.0 ppb (0) | 2.4 ppb (3) | 3.0 ppb (3) | 2.4 ppb (3) | 0.0 ppb (0) | 41.0 ppb (38) | 0.16 ppb (3) | N/A | 8.0 μg/m3 (34) | 38.0 | |
| April 18, 2021, 10 p.m. | 1.8 ppb (2) | 0.2 ppb (1) | 1.5 ppb (2) | 2.0 ppb (2) | 1.4 ppb (2) | 0.0 ppb (0) | 42.0 ppb (39) | 0.15 ppb (2) | N/A | 5.0 μg/m3 (21) | 39.0 | |
| April 18, 2021, 9 p.m. | 1.6 ppb (2) | 0.2 ppb (1) | 1.3 ppb (2) | 2.0 ppb (2) | 1.1 ppb (2) | 0.0 ppb (0) | 42.0 ppb (39) | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 39.0 | |
| April 18, 2021, 8 p.m. | 1.5 ppb (2) | 0.2 ppb (1) | 1.2 ppb (2) | 1.0 ppb (1) | 1.0 ppb (1) | 0.0 ppb (0) | 42.0 ppb (39) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 39.0 | |
| April 18, 2021, 7 p.m. | 1.3 ppb (2) | 0.2 ppb (1) | 1.0 ppb (1) | 1.0 ppb (1) | 0.9 ppb (1) | 0.0 ppb (0) | 41.0 ppb (38) | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 18, 2021, 6 p.m. | 1.0 ppb (1) | 0.2 ppb (1) | 0.7 ppb (1) | 1.0 ppb (1) | 0.5 ppb (1) | 0.0 ppb (0) | 41.0 ppb (38) | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 18, 2021, 5 p.m. | 1.0 ppb (1) | 0.2 ppb (1) | 0.7 ppb (1) | 1.0 ppb (1) | 0.5 ppb (1) | 0.0 ppb (0) | 40.0 ppb (38) | 0.14 ppb (2) | N/A | 7.0 μg/m3 (30) | 38.0 | |
| April 18, 2021, 4 p.m. | 1.1 ppb (2) | 0.2 ppb (1) | 0.9 ppb (1) | 1.0 ppb (1) | 0.7 ppb (1) | 0.0 ppb (0) | 39.0 ppb (37) | 0.14 ppb (2) | N/A | 8.0 μg/m3 (34) | 37.0 | |
| April 18, 2021, 3 p.m. | 1.5 ppb (2) | 0.3 ppb (1) | 1.3 ppb (2) | 1.0 ppb (1) | 1.0 ppb (1) | 0.0 ppb (0) | 40.0 ppb (38) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 18, 2021, 2 p.m. | 1.7 ppb (2) | 0.5 ppb (1) | 1.6 ppb (2) | 1.0 ppb (1) | 1.1 ppb (2) | 0.0 ppb (0) | 38.0 ppb (36) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 36.0 | |
| April 18, 2021, 1 p.m. | 2.9 ppb (3) | 0.7 ppb (1) | 2.8 ppb (3) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 34.0 | |
| April 18, 2021, noon | 5.8 ppb (6) | 0.7 ppb (1) | 5.7 ppb (6) | 5.0 ppb (5) | 5.0 ppb (5) | 0.0 ppb (0) | 30.0 ppb (28) | 0.17 ppb (3) | N/A | 5.0 μg/m3 (21) | 28.0 | |
| April 18, 2021, 11 a.m. | 7.2 ppb (7) | 0.5 ppb (1) | 7.0 ppb (7) | 7.0 ppb (7) | 6.5 ppb (7) | 0.0 ppb (0) | 26.0 ppb (25) | 0.18 ppb (3) | N/A | 1.0 μg/m3 (5) | 25.0 | |
| April 18, 2021, 10 a.m. | 8.8 ppb (9) | 0.3 ppb (1) | 9.3 ppb (9) | 8.0 ppb (8) | 8.9 ppb (9) | 0.0 ppb (0) | 21.0 ppb (20) | 0.2 ppb (3) | N/A | 1.0 μg/m3 (5) | 20.0 | |
| April 18, 2021, 9 a.m. | 6.7 ppb (7) | 0.2 ppb (1) | 6.7 ppb (7) | 7.0 ppb (7) | 6.5 ppb (7) | 0.0 ppb (0) | 22.0 ppb (21) | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 21.0 | |
| April 18, 2021, 8 a.m. | 5.1 ppb (5) | 0.1 ppb (1) | 4.9 ppb (5) | 5.0 ppb (5) | 4.8 ppb (5) | 0.0 ppb (0) | 24.0 ppb (23) | 0.17 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 18, 2021, 7 a.m. | 4.8 ppb (5) | 0.1 ppb (1) | 4.6 ppb (5) | 5.0 ppb (5) | 4.5 ppb (5) | 0.0 ppb (0) | 25.0 ppb (24) | 0.18 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 18, 2021, 6 a.m. | 5.7 ppb (6) | 0.1 ppb (1) | 5.6 ppb (6) | 6.0 ppb (6) | 5.6 ppb (6) | 0.0 ppb (0) | 24.0 ppb (23) | 0.19 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 18, 2021, 5 a.m. | 5.6 ppb (6) | 0.1 ppb (1) | 5.5 ppb (6) | 6.0 ppb (6) | 5.5 ppb (6) | 0.0 ppb (0) | 24.0 ppb (23) | 0.2 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 18, 2021, 4 a.m. | 8.7 ppb (9) | 0.1 ppb (1) | 8.9 ppb (9) | 9.0 ppb (9) | 8.8 ppb (9) | 0.0 ppb (0) | 22.0 ppb (21) | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| April 18, 2021, 3 a.m. | 12.3 ppb (12) | 0.1 ppb (1) | 12.4 ppb (12) | 12.0 ppb (12) | 12.3 ppb (12) | 0.0 ppb (0) | 20.0 ppb (19) | 0.27 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| April 18, 2021, 2 a.m. | 11.4 ppb (11) | 0.1 ppb (1) | 11.8 ppb (12) | 11.0 ppb (11) | 11.8 ppb (12) | 0.0 ppb (0) | 21.0 ppb (20) | 0.26 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 18, 2021, 1 a.m. | 8.1 ppb (8) | 0.2 ppb (1) | 7.8 ppb (8) | 8.0 ppb (8) | 7.6 ppb (8) | 0.0 ppb (0) | 24.0 ppb (23) | 0.21 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 18, 2021, midnight | 6.1 ppb (6) | 0.0 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | 6.0 ppb (6) | 0.0 ppb (0) | 27.0 ppb (25) | 0.21 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 17, 2021, 11 p.m. | 4.0 ppb (4) | 0.1 ppb (1) | 3.8 ppb (4) | 4.0 ppb (4) | 3.6 ppb (4) | 0.0 ppb (0) | 31.0 ppb (29) | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| April 17, 2021, 10 p.m. | 2.4 ppb (3) | 0.2 ppb (1) | 2.2 ppb (3) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 34.0 ppb (32) | 0.16 ppb (3) | N/A | 1.0 μg/m3 (5) | 32.0 | |
| April 17, 2021, 9 p.m. | 2.3 ppb (3) | 0.3 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | 1.8 ppb (2) | 0.0 ppb (0) | 34.0 ppb (32) | 0.16 ppb (3) | N/A | 1.0 μg/m3 (5) | 32.0 | |
| April 17, 2021, 8 p.m. | 2.0 ppb (2) | 0.3 ppb (1) | 1.7 ppb (2) | 2.0 ppb (2) | 1.4 ppb (2) | 0.0 ppb (0) | 34.0 ppb (32) | 0.16 ppb (3) | N/A | 3.0 μg/m3 (13) | 32.0 | |
| April 17, 2021, 7 p.m. | 2.7 ppb (3) | 0.6 ppb (1) | 2.4 ppb (3) | 2.0 ppb (2) | 1.8 ppb (2) | 0.0 ppb (0) | 33.0 ppb (31) | 0.17 ppb (3) | N/A | 2.0 μg/m3 (9) | 31.0 | |
| April 17, 2021, 6 p.m. | 2.0 ppb (2) | 0.5 ppb (1) | 1.7 ppb (2) | 1.0 ppb (1) | 1.1 ppb (2) | 0.0 ppb (0) | 34.0 ppb (32) | 0.16 ppb (3) | N/A | 1.0 μg/m3 (5) | 32.0 | |
| April 17, 2021, 5 p.m. | 2.1 ppb (2) | 0.7 ppb (1) | 1.9 ppb (2) | 2.0 ppb (2) | 1.3 ppb (2) | 0.0 ppb (0) | 34.0 ppb (32) | 0.16 ppb (3) | N/A | 0.0 μg/m3 (0) | 32.0 | |
| April 17, 2021, 4 p.m. | 2.7 ppb (3) | 0.6 ppb (1) | 2.5 ppb (3) | 2.0 ppb (2) | 1.9 ppb (2) | 0.0 ppb (0) | 33.0 ppb (31) | 0.16 ppb (3) | N/A | -1.0 μg/m3 (0) | 31.0 | |
| April 17, 2021, 3 p.m. | 2.3 ppb (3) | 0.5 ppb (1) | 2.1 ppb (2) | 2.0 ppb (2) | 1.5 ppb (2) | 0.0 ppb (0) | 33.0 ppb (31) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 31.0 | |
| April 17, 2021, 2 p.m. | 2.3 ppb (3) | 0.5 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | 1.5 ppb (2) | 0.0 ppb (0) | 32.0 ppb (30) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 30.0 | |
| April 17, 2021, 1 p.m. | 2.5 ppb (3) | 0.6 ppb (1) | 2.2 ppb (3) | 2.0 ppb (2) | 1.6 ppb (2) | 0.0 ppb (0) | 32.0 ppb (30) | 0.15 ppb (2) | N/A | 1.0 μg/m3 (5) | 30.0 | |
| April 17, 2021, noon | 3.3 ppb (4) | 0.6 ppb (1) | 2.6 ppb (3) | 3.0 ppb (3) | 2.1 ppb (2) | 0.0 ppb (0) | 33.0 ppb (31) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 31.0 | |
| April 17, 2021, 11 a.m. | 2.9 ppb (3) | 0.3 ppb (1) | 2.6 ppb (3) | 3.0 ppb (3) | 2.3 ppb (3) | 0.0 ppb (0) | 34.0 ppb (32) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 32.0 | |
| April 17, 2021, 10 a.m. | 3.0 ppb (3) | 0.2 ppb (1) | 2.6 ppb (3) | 3.0 ppb (3) | 2.4 ppb (3) | 0.0 ppb (0) | 35.0 ppb (33) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 33.0 | |
| April 17, 2021, 9 a.m. | 2.6 ppb (3) | 0.1 ppb (1) | 2.2 ppb (3) | 3.0 ppb (3) | 2.1 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.14 ppb (2) | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 17, 2021, 8 a.m. | 2.2 ppb (3) | 0.1 ppb (1) | 1.8 ppb (2) | 2.0 ppb (2) | 1.7 ppb (2) | 0.0 ppb (0) | 37.0 ppb (35) | 0.14 ppb (2) | N/A | 3.0 μg/m3 (13) | 35.0 | |
| April 17, 2021, 7 a.m. | 2.1 ppb (2) | 0.1 ppb (1) | 1.7 ppb (2) | 2.0 ppb (2) | 1.6 ppb (2) | 0.0 ppb (0) | 37.0 ppb (35) | 0.14 ppb (2) | N/A | 3.0 μg/m3 (13) | 35.0 | |
| April 17, 2021, 6 a.m. | 1.9 ppb (2) | 0.1 ppb (1) | 1.5 ppb (2) | 2.0 ppb (2) | 1.4 ppb (2) | 0.0 ppb (0) | 37.0 ppb (35) | 0.14 ppb (2) | N/A | 1.0 μg/m3 (5) | 35.0 | |
| April 17, 2021, 5 a.m. | 2.0 ppb (2) | 0.1 ppb (1) | 1.6 ppb (2) | 2.0 ppb (2) | 1.5 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 34.0 | |
| April 17, 2021, 4 a.m. | 2.1 ppb (2) | 0.1 ppb (1) | 1.7 ppb (2) | 2.0 ppb (2) | 1.6 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.14 ppb (2) | N/A | 1.0 μg/m3 (5) | 34.0 | |
| April 17, 2021, 3 a.m. | 2.1 ppb (2) | 0.1 ppb (1) | 1.7 ppb (2) | 2.0 ppb (2) | 1.6 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 34.0 | |
| April 17, 2021, 2 a.m. | 2.4 ppb (3) | 0.1 ppb (1) | 2.0 ppb (2) | 2.0 ppb (2) | 1.8 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 1.0 μg/m3 (5) | 34.0 | |
| April 17, 2021, 1 a.m. | 2.1 ppb (2) | 0.1 ppb (1) | 1.7 ppb (2) | 2.0 ppb (2) | 1.6 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 17, 2021, midnight | 2.5 ppb (3) | 0.2 ppb (1) | 2.1 ppb (2) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 16, 2021, 11 p.m. | 2.6 ppb (3) | 0.2 ppb (1) | 2.1 ppb (2) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 35.0 ppb (33) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 33.0 | |
| April 16, 2021, 10 p.m. | 2.6 ppb (3) | 0.3 ppb (1) | 2.2 ppb (3) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 35.0 ppb (33) | 0.16 ppb (3) | N/A | 1.0 μg/m3 (5) | 33.0 | |
| April 16, 2021, 9 p.m. | 2.7 ppb (3) | 0.2 ppb (1) | 2.3 ppb (3) | 2.0 ppb (2) | 2.0 ppb (2) | 0.0 ppb (0) | 35.0 ppb (33) | 0.16 ppb (3) | N/A | 2.0 μg/m3 (9) | 33.0 | |
| April 16, 2021, 8 p.m. | 2.5 ppb (3) | 0.2 ppb (1) | 2.1 ppb (2) | 2.0 ppb (2) | 1.9 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 16, 2021, 7 p.m. | 2.9 ppb (3) | 0.3 ppb (1) | 2.6 ppb (3) | 3.0 ppb (3) | 2.3 ppb (3) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 34.0 | |
| April 16, 2021, 6 p.m. | 3.1 ppb (3) | 0.3 ppb (1) | 2.8 ppb (3) | 3.0 ppb (3) | 2.4 ppb (3) | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 35.0 | |
| April 16, 2021, 5 p.m. | 3.2 ppb (4) | 0.4 ppb (1) | 2.8 ppb (3) | 3.0 ppb (3) | 2.4 ppb (3) | 0.0 ppb (0) | 38.0 ppb (36) | 0.15 ppb (2) | N/A | 1.0 μg/m3 (5) | 36.0 | |
| April 16, 2021, 4 p.m. | 3.4 ppb (4) | 0.5 ppb (1) | 3.1 ppb (3) | 3.0 ppb (3) | 2.5 ppb (3) | 0.0 ppb (0) | 38.0 ppb (36) | 0.15 ppb (2) | N/A | -2.0 μg/m3 (0) | 36.0 | |
| April 16, 2021, 3 p.m. | 4.1 ppb (4) | 0.5 ppb (1) | 3.8 ppb (4) | 4.0 ppb (4) | 3.3 ppb (4) | 0.0 ppb (0) | 38.0 ppb (36) | 0.16 ppb (3) | N/A | 1.0 μg/m3 (5) | 36.0 | |
| April 16, 2021, 2 p.m. | 6.4 ppb (7) | 0.9 ppb (1) | 6.1 ppb (6) | 6.0 ppb (6) | 5.3 ppb (5) | 0.0 ppb (0) | 36.0 ppb (34) | 0.17 ppb (3) | N/A | 3.0 μg/m3 (13) | 34.0 | |
| April 16, 2021, 1 p.m. | 5.7 ppb (6) | 0.6 ppb (1) | 5.6 ppb (6) | 5.0 ppb (5) | 5.0 ppb (5) | 0.0 ppb (0) | 39.0 ppb (37) | 0.17 ppb (3) | N/A | 1.0 μg/m3 (5) | 37.0 | |
| April 16, 2021, noon | 3.1 ppb (3) | 0.3 ppb (1) | 3.0 ppb (3) | 3.0 ppb (3) | 2.7 ppb (3) | 0.0 ppb (0) | 43.0 ppb (40) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 40.0 | |
| April 16, 2021, 11 a.m. | 5.5 ppb (6) | 0.2 ppb (1) | 5.4 ppb (6) | 5.0 ppb (5) | 5.1 ppb (5) | 0.0 ppb (0) | 39.0 ppb (37) | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 37.0 | |
| April 16, 2021, 10 a.m. | 5.3 ppb (5) | 0.2 ppb (1) | 5.2 ppb (5) | 5.0 ppb (5) | 5.0 ppb (5) | 0.0 ppb (0) | 38.0 ppb (36) | 0.17 ppb (3) | N/A | 3.0 μg/m3 (13) | 36.0 | |
| April 16, 2021, 9 a.m. | 3.4 ppb (4) | 0.1 ppb (1) | 3.3 ppb (4) | 3.0 ppb (3) | 3.1 ppb (3) | 0.0 ppb (0) | 40.0 ppb (38) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| April 16, 2021, 8 a.m. | 3.7 ppb (4) | 0.2 ppb (1) | 3.7 ppb (4) | 4.0 ppb (4) | 3.5 ppb (4) | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 35.0 | |
| April 16, 2021, 7 a.m. | N/A | N/A | 2.8 ppb (3) | N/A | 2.6 ppb (3) | N/A | 39.0 ppb (37) | N/A | N/A | 4.0 μg/m3 (17) | 37.0 | |
| April 16, 2021, 6 a.m. | N/A | N/A | 2.2 ppb (3) | N/A | 1.9 ppb (2) | N/A | 40.0 ppb (38) | N/A | N/A | 5.0 μg/m3 (21) | 38.0 | |
| April 16, 2021, 5 a.m. | N/A | N/A | 2.6 ppb (3) | N/A | 2.3 ppb (3) | N/A | 38.0 ppb (36) | N/A | N/A | 6.0 μg/m3 (25) | 36.0 | |
| April 16, 2021, 4 a.m. | 2.2 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.14 ppb (2) | N/A | 6.0 μg/m3 (25) | 36.0 | |
| April 16, 2021, 3 a.m. | 2.4 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 8.0 μg/m3 (34) | 35.0 | |
| April 16, 2021, 2 a.m. | 1.5 ppb (2) | 0.1 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 6.0 μg/m3 (25) | 35.0 | |
| April 16, 2021, 1 a.m. | 2.2 ppb (3) | 0.1 ppb (1) | 1.9 ppb (2) | 2.0 ppb (2) | 1.8 ppb (2) | 0.0 ppb (0) | 36.0 ppb (34) | 0.15 ppb (2) | N/A | 7.0 μg/m3 (30) | 34.0 | |
| April 16, 2021, midnight | 2.6 ppb (3) | 0.1 ppb (1) | 2.4 ppb (3) | 3.0 ppb (3) | 2.2 ppb (3) | 0.0 ppb (0) | 35.0 ppb (33) | 0.16 ppb (3) | N/A | 6.0 μg/m3 (25) | 33.0 | |
| April 15, 2021, 11 p.m. | 3.1 ppb (3) | 0.1 ppb (1) | 3.2 ppb (4) | 3.0 ppb (3) | 3.0 ppb (3) | 0.0 ppb (0) | 35.0 ppb (33) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 33.0 | |
| April 15, 2021, 10 p.m. | 3.2 ppb (4) | 0.3 ppb (1) | 3.3 ppb (4) | 3.0 ppb (3) | 2.9 ppb (3) | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 6.0 μg/m3 (25) | 35.0 | |
| April 15, 2021, 9 p.m. | 2.6 ppb (3) | 0.2 ppb (1) | 2.5 ppb (3) | 2.0 ppb (2) | 2.3 ppb (3) | 0.0 ppb (0) | 38.0 ppb (36) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 36.0 | |
| April 15, 2021, 8 p.m. | 3.7 ppb (4) | 0.5 ppb (1) | 3.8 ppb (4) | 3.0 ppb (3) | 3.3 ppb (4) | 0.0 ppb (0) | 39.0 ppb (37) | 0.16 ppb (3) | N/A | 4.0 μg/m3 (17) | 37.0 | |
| April 15, 2021, 7 p.m. | 3.7 ppb (4) | 0.5 ppb (1) | 3.7 ppb (4) | 3.0 ppb (3) | 3.1 ppb (3) | 0.0 ppb (0) | 40.0 ppb (38) | 0.15 ppb (2) | N/A | 6.0 μg/m3 (25) | 38.0 | |
| April 15, 2021, 6 p.m. | 2.8 ppb (3) | 0.3 ppb (1) | 2.7 ppb (3) | 2.0 ppb (2) | 2.4 ppb (3) | 0.0 ppb (0) | 41.0 ppb (38) | 0.14 ppb (2) | N/A | 3.0 μg/m3 (13) | 38.0 | |
| April 15, 2021, 5 p.m. | 3.1 ppb (3) | 0.4 ppb (1) | 3.3 ppb (4) | 3.0 ppb (3) | 2.8 ppb (3) | 0.0 ppb (0) | 42.0 ppb (39) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (13) | 39.0 | |
| April 15, 2021, 4 p.m. | N/A | N/A | N/A | N/A | 4.7 ppb (5) | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| April 15, 2021, 3 p.m. | N/A | N/A | N/A | N/A | 4.5 ppb (5) | N/A | N/A | N/A | N/A | 2.0 μg/m3 (9) | 9.0 | |
| April 15, 2021, 2 p.m. | 4.0 ppb (4) | 0.5 ppb (1) | 6.1 ppb (6) | 4.0 ppb (4) | 5.7 ppb (6) | 0.0 ppb (0) | 39.0 ppb (37) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 37.0 | |
| April 15, 2021, 1 p.m. | 4.9 ppb (5) | 0.6 ppb (1) | 3.9 ppb (4) | 4.0 ppb (4) | 3.4 ppb (4) | 0.0 ppb (0) | 36.0 ppb (34) | 0.18 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| April 15, 2021, noon | 6.3 ppb (6) | 0.7 ppb (1) | 1.5 ppb (2) | 6.0 ppb (6) | 0.8 ppb (1) | 0.0 ppb (0) | 35.0 ppb (33) | 0.18 ppb (3) | N/A | 5.0 μg/m3 (21) | 33.0 | |
| April 15, 2021, 11 a.m. | 6.8 ppb (7) | 0.9 ppb (1) | 1.7 ppb (2) | 6.0 ppb (6) | 0.9 ppb (1) | 0.0 ppb (0) | 31.0 ppb (29) | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| April 15, 2021, 10 a.m. | 4.4 ppb (5) | 0.6 ppb (1) | 0.9 ppb (1) | 4.0 ppb (4) | 0.5 ppb (1) | 0.0 ppb (0) | N/A | 0.17 ppb (3) | N/A | 3.0 μg/m3 (13) | 13.0 | |
| April 15, 2021, 9 a.m. | 3.3 ppb (4) | 0.1 ppb (1) | 0.6 ppb (1) | 3.0 ppb (3) | 0.3 ppb (1) | 0.0 ppb (0) | N/A | 0.14 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| April 15, 2021, 8 a.m. | 2.7 ppb (3) | 0.1 ppb (1) | 0.1 ppb (1) | 3.0 ppb (3) | 0.0 ppb (0) | 0.0 ppb (0) | 34.0 ppb (32) | 0.14 ppb (2) | N/A | 7.0 μg/m3 (30) | 32.0 | |
| April 15, 2021, 7 a.m. | 2.3 ppb (3) | 0.1 ppb (1) | -0.1 ppb (0) | 2.0 ppb (2) | -0.1 ppb (0) | 0.0 ppb (0) | 37.0 ppb (35) | 0.14 ppb (2) | N/A | 8.0 μg/m3 (34) | 35.0 | |
| April 15, 2021, 6 a.m. | 3.0 ppb (3) | 0.1 ppb (1) | 0.0 ppb (0) | 3.0 ppb (3) | -0.1 ppb (0) | 0.0 ppb (0) | 37.0 ppb (35) | 0.15 ppb (2) | N/A | 6.0 μg/m3 (25) | 35.0 | |
| April 15, 2021, 5 a.m. | 2.5 ppb (3) | 0.1 ppb (1) | -0.3 ppb (0) | 2.0 ppb (2) | -0.3 ppb (0) | 0.0 ppb (0) | 37.0 ppb (35) | 0.14 ppb (2) | N/A | 7.0 μg/m3 (30) | 35.0 | |
| April 15, 2021, 4 a.m. | 2.1 ppb (2) | 0.1 ppb (1) | -0.5 ppb (0) | 2.0 ppb (2) | -0.5 ppb (0) | 0.0 ppb (0) | 41.0 ppb (38) | 0.14 ppb (2) | N/A | 6.0 μg/m3 (25) | 38.0 | |
| April 15, 2021, 3 a.m. | 3.1 ppb (3) | 0.1 ppb (1) | -0.4 ppb (0) | 3.0 ppb (3) | -0.4 ppb (0) | 0.0 ppb (0) | 38.0 ppb (36) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 36.0 | |
| April 15, 2021, 2 a.m. | 3.3 ppb (4) | 0.1 ppb (1) | -0.5 ppb (0) | 3.0 ppb (3) | -0.5 ppb (0) | 0.0 ppb (0) | 38.0 ppb (36) | 0.16 ppb (3) | N/A | 7.0 μg/m3 (30) | 36.0 | |
| April 15, 2021, 1 a.m. | 3.1 ppb (3) | 0.1 ppb (1) | -0.5 ppb (0) | 3.0 ppb (3) | -0.5 ppb (0) | 0.0 ppb (0) | 39.0 ppb (37) | 0.16 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| April 15, 2021, midnight | 3.2 ppb (4) | 0.2 ppb (1) | -0.4 ppb (0) | 3.0 ppb (3) | -0.6 ppb (0) | 0.0 ppb (0) | 39.0 ppb (37) | 0.16 ppb (3) | N/A | 7.0 μg/m3 (30) | 37.0 | |
| April 14, 2021, 11 p.m. | 2.6 ppb (3) | 0.1 ppb (1) | -0.6 ppb (0) | 3.0 ppb (3) | -0.6 ppb (0) | 0.0 ppb (0) | 41.0 ppb (38) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 38.0 | |
| April 14, 2021, 10 p.m. | 1.9 ppb (2) | 0.2 ppb (1) | -0.6 ppb (0) | 2.0 ppb (2) | -0.7 ppb (0) | 0.0 ppb (0) | 44.0 ppb (41) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 41.0 | |
| April 14, 2021, 9 p.m. | 1.8 ppb (2) | 0.2 ppb (1) | -0.6 ppb (0) | 2.0 ppb (2) | -0.7 ppb (0) | 0.0 ppb (0) | 47.0 ppb (44) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 44.0 | |
| April 14, 2021, 8 p.m. | 1.8 ppb (2) | 0.3 ppb (1) | -0.6 ppb (0) | 2.0 ppb (2) | -0.8 ppb (0) | 0.0 ppb (0) | 47.0 ppb (44) | 0.16 ppb (3) | N/A | 4.0 μg/m3 (17) | 44.0 | |
| April 14, 2021, 7 p.m. | 1.7 ppb (2) | 0.3 ppb (1) | -0.5 ppb (0) | 1.0 ppb (1) | -0.8 ppb (0) | 0.0 ppb (0) | 47.0 ppb (44) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 44.0 |