Concord (Chevron) CA, US: 37.9383, -122.025
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 15, 2021, 9 p.m. | 2.2 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.26 ppb (4) | N/A | 3.0 μg/m3 (13) | 32.0 | |
| May 15, 2021, 8 p.m. | 2.2 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.26 ppb (4) | N/A | 5.0 μg/m3 (21) | 31.0 | |
| May 15, 2021, 7 p.m. | 2.0 ppb (2) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.26 ppb (4) | N/A | 3.0 μg/m3 (13) | 29.0 | |
| May 15, 2021, 6 p.m. | 2.2 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.26 ppb (4) | N/A | 2.0 μg/m3 (9) | 29.0 | |
| May 15, 2021, 5 p.m. | 2.1 ppb (2) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 28.0 | |
| May 15, 2021, 4 p.m. | 1.9 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.25 ppb (3) | N/A | 5.0 μg/m3 (21) | 29.0 | |
| May 15, 2021, 3 p.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| May 15, 2021, 2 p.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| May 15, 2021, 1 p.m. | 1.3 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 31.0 | |
| May 15, 2021, noon | 1.2 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 32.0 | |
| May 15, 2021, 11 a.m. | 1.2 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.24 ppb (3) | N/A | 7.0 μg/m3 (30) | 32.0 | |
| May 15, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 9 a.m. | 0.9 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 8 a.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.22 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 7 a.m. | 1.2 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.22 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 6 a.m. | 1.2 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 15, 2021, 5 a.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.22 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 15, 2021, 4 a.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.23 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 15, 2021, 3 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.23 ppb (3) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| May 15, 2021, 2 a.m. | 2.7 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 15, 2021, 1 a.m. | 2.4 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.23 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 15, 2021, midnight | 2.4 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.23 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 14, 2021, 11 p.m. | 2.8 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.23 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 14, 2021, 10 p.m. | 2.8 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.24 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 14, 2021, 9 p.m. | 2.9 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.25 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 14, 2021, 8 p.m. | 2.5 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.25 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 14, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 14, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 14, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 14, 2021, 3 p.m. | 3.0 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.26 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 14, 2021, 2 p.m. | 2.7 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.22 ppb (3) | N/A | 4.0 μg/m3 (17) | 24.0 | |
| May 14, 2021, 1 p.m. | 2.3 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.21 ppb (3) | N/A | 4.0 μg/m3 (17) | 25.0 | |
| May 14, 2021, noon | 2.1 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.21 ppb (3) | N/A | 4.0 μg/m3 (17) | 24.0 | |
| May 14, 2021, 11 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.2 ppb (3) | N/A | 4.0 μg/m3 (17) | 23.0 | |
| May 14, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 14, 2021, 9 a.m. | 2.0 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.2 ppb (3) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| May 14, 2021, 8 a.m. | 1.8 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.2 ppb (3) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| May 14, 2021, 7 a.m. | 2.0 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.21 ppb (3) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| May 14, 2021, 6 a.m. | 2.4 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.21 ppb (3) | N/A | 3.0 μg/m3 (13) | 21.0 | |
| May 14, 2021, 5 a.m. | 2.7 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.21 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 14, 2021, 4 a.m. | 3.3 ppb (4) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.22 ppb (3) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| May 14, 2021, 3 a.m. | 4.5 ppb (5) | 0.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.24 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 14, 2021, 2 a.m. | 5.1 ppb (5) | 0.5 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.23 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 14, 2021, 1 a.m. | 4.4 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.23 ppb (3) | N/A | 3.0 μg/m3 (13) | 27.0 | |
| May 14, 2021, midnight | 2.6 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.22 ppb (3) | N/A | 2.0 μg/m3 (9) | 32.0 | |
| May 13, 2021, 11 p.m. | 2.3 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (35) | 0.23 ppb (3) | N/A | 3.0 μg/m3 (13) | 35.0 | |
| May 13, 2021, 10 p.m. | 68.2 ppb (67) | 31.1 ppb (30) | N/A | N/A | N/A | 29.0 ppb (42) | 19.0 ppb (18) | 3.2 ppb (37) | N/A | 4.0 μg/m3 (17) | 67.0 | |
| May 13, 2021, 9 p.m. | 2.6 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 2.0 ppb (3) | N/A | 0.28 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 13, 2021, 8 p.m. | 77.2 ppb (76) | 76.5 ppb (75) | N/A | 1.0 ppb (1) | N/A | 38.0 ppb (54) | 0.0 ppb (0) | 1.83 ppb (21) | N/A | 7.0 μg/m3 (30) | 76.0 | |
| May 13, 2021, 7 p.m. | 351.2 ppb (149) | 349.0 ppb (148) | N/A | 2.0 ppb (2) | N/A | N/A | 16.0 ppb (15) | N/A | N/A | 2.0 μg/m3 (9) | 149.0 | |
| May 13, 2021, 6 p.m. | 6.3 ppb (6) | 1.6 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.27 ppb (4) | N/A | 3.0 μg/m3 (13) | 29.0 | |
| May 13, 2021, 5 p.m. | 6.3 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.28 ppb (4) | N/A | 4.0 μg/m3 (17) | 27.0 | |
| May 13, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 13, 2021, 3 p.m. | 5.1 ppb (5) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.26 ppb (4) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| May 13, 2021, 2 p.m. | 3.9 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.25 ppb (3) | N/A | 4.0 μg/m3 (17) | 25.0 | |
| May 13, 2021, 1 p.m. | 3.1 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.24 ppb (3) | N/A | 4.0 μg/m3 (17) | 26.0 | |
| May 13, 2021, noon | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 26.0 | |
| May 13, 2021, 11 a.m. | 3.4 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (25) | 0.23 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 13, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 13, 2021, 9 a.m. | 3.9 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.24 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 13, 2021, 8 a.m. | 3.5 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.24 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 13, 2021, 7 a.m. | 2.7 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.23 ppb (3) | N/A | 2.0 μg/m3 (9) | 28.0 | |
| May 13, 2021, 6 a.m. | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 32.0 ppb (30) | 0.23 ppb (3) | N/A | 4.0 μg/m3 (17) | 30.0 | |
| May 13, 2021, 5 a.m. | 2.6 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 33.0 | |
| May 13, 2021, 4 a.m. | 3.3 ppb (4) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.23 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 13, 2021, 3 a.m. | 3.7 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.25 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 13, 2021, 2 a.m. | 2.9 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (36) | 0.23 ppb (3) | N/A | 4.0 μg/m3 (17) | 36.0 | |
| May 13, 2021, 1 a.m. | 2.2 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 42.0 ppb (39) | 0.22 ppb (3) | N/A | 5.0 μg/m3 (21) | 39.0 | |
| May 13, 2021, midnight | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 45.0 ppb (42) | 0.2 ppb (3) | N/A | 7.0 μg/m3 (30) | 42.0 | |
| May 12, 2021, 11 p.m. | 2.0 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.21 ppb (3) | N/A | 6.0 μg/m3 (25) | 41.0 | |
| May 12, 2021, 10 p.m. | 1.9 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 46.0 ppb (43) | 0.2 ppb (3) | N/A | 8.0 μg/m3 (34) | 43.0 | |
| May 12, 2021, 9 p.m. | 1.9 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 47.0 ppb (44) | 0.2 ppb (3) | N/A | 6.0 μg/m3 (25) | 44.0 | |
| May 12, 2021, 8 p.m. | 3.6 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 45.0 ppb (42) | 0.23 ppb (3) | N/A | 7.0 μg/m3 (30) | 42.0 | |
| May 12, 2021, 7 p.m. | 6.2 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 2.0 ppb (3) | 43.0 ppb (40) | 0.26 ppb (4) | N/A | 6.0 μg/m3 (25) | 40.0 | |
| May 12, 2021, 6 p.m. | 9.9 ppb (10) | 1.9 ppb (2) | N/A | 8.0 ppb (8) | N/A | 3.0 ppb (5) | 36.0 ppb (34) | 0.31 ppb (4) | N/A | 7.0 μg/m3 (30) | 34.0 | |
| May 12, 2021, 5 p.m. | 12.4 ppb (12) | 3.1 ppb (3) | N/A | 9.0 ppb (9) | N/A | 3.0 ppb (5) | 28.0 ppb (26) | 0.34 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 12, 2021, 4 p.m. | 14.1 ppb (14) | 3.9 ppb (4) | N/A | 10.0 ppb (10) | N/A | 1.0 ppb (2) | 22.0 ppb (21) | 0.4 ppb (5) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 12, 2021, 3 p.m. | 13.9 ppb (14) | 4.1 ppb (4) | N/A | 10.0 ppb (10) | N/A | 1.0 ppb (2) | 18.0 ppb (17) | 0.37 ppb (5) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 12, 2021, 2 p.m. | 9.9 ppb (10) | 2.3 ppb (3) | N/A | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 16.0 ppb (15) | 0.3 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 12, 2021, 1 p.m. | 8.7 ppb (9) | 0.9 ppb (1) | N/A | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 13.0 ppb (13) | 0.28 ppb (4) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 12, 2021, noon | 7.9 ppb (8) | 0.2 ppb (1) | N/A | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 16.0 ppb (15) | 0.25 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 12, 2021, 11 a.m. | 9.0 ppb (9) | 0.2 ppb (1) | N/A | 9.0 ppb (9) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 12, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 12, 2021, 9 a.m. | 8.0 ppb (8) | 0.2 ppb (1) | N/A | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 20.0 ppb (19) | 0.26 ppb (4) | N/A | 15.0 μg/m3 (58) | 58.0 | |
| May 12, 2021, 8 a.m. | 2.9 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (28) | 0.22 ppb (3) | N/A | 18.0 μg/m3 (64) | 64.0 | |
| May 12, 2021, 7 a.m. | 3.6 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.23 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 12, 2021, 6 a.m. | 2.7 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.21 ppb (3) | N/A | 14.0 μg/m3 (55) | 55.0 | |
| May 11, 2021, 8 p.m. | 2.7 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 50.0 ppb (47) | 0.19 ppb (3) | N/A | 7.0 μg/m3 (30) | 47.0 | |
| May 11, 2021, 7 p.m. | 3.7 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 46.0 ppb (43) | 0.19 ppb (3) | N/A | 8.0 μg/m3 (34) | 43.0 | |
| May 11, 2021, 6 p.m. | 4.2 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 44.0 ppb (41) | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 41.0 | |
| May 11, 2021, 5 p.m. | 4.1 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 40.0 ppb (38) | 0.24 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 11, 2021, 4 p.m. | 6.3 ppb (6) | 1.3 ppb (2) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | 30.0 ppb (28) | 0.27 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 11, 2021, 3 p.m. | 9.9 ppb (10) | 2.6 ppb (3) | N/A | 7.0 ppb (7) | N/A | 1.0 ppb (2) | 21.0 ppb (20) | 0.32 ppb (4) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| May 11, 2021, 2 p.m. | 11.0 ppb (11) | 2.8 ppb (3) | N/A | 8.0 ppb (8) | N/A | 1.0 ppb (2) | 14.0 ppb (13) | 0.33 ppb (4) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 11, 2021, 1 p.m. | 10.5 ppb (10) | 0.9 ppb (1) | N/A | 10.0 ppb (10) | N/A | 1.0 ppb (2) | 11.0 ppb (11) | 0.3 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 11, 2021, noon | 10.2 ppb (10) | 0.3 ppb (1) | N/A | 10.0 ppb (10) | N/A | 1.0 ppb (2) | 12.0 ppb (12) | 0.3 ppb (4) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 11, 2021, 11 a.m. | 4.9 ppb (5) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | 22.0 ppb (21) | 0.23 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 11, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 11, 2021, 9 a.m. | 3.8 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (26) | 0.22 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 11, 2021, 8 a.m. | 4.3 ppb (5) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 27.0 ppb (25) | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 11, 2021, 7 a.m. | 5.5 ppb (6) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.26 ppb (4) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 11, 2021, 6 a.m. | 4.5 ppb (5) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 26.0 ppb (25) | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 11, 2021, 5 a.m. | 3.3 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 30.0 ppb (28) | 0.2 ppb (3) | N/A | 5.0 μg/m3 (21) | 28.0 | |
| May 11, 2021, 4 a.m. | 2.6 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 33.0 ppb (31) | 0.19 ppb (3) | N/A | 7.0 μg/m3 (30) | 31.0 | |
| May 11, 2021, 3 a.m. | 2.2 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 37.0 ppb (35) | 0.19 ppb (3) | N/A | 6.0 μg/m3 (25) | 35.0 | |
| May 11, 2021, 2 a.m. | 1.8 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 39.0 ppb (37) | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 37.0 | |
| May 11, 2021, 1 a.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 41.0 ppb (38) | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 38.0 | |
| May 11, 2021, midnight | 2.3 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 45.0 ppb (42) | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 42.0 | |
| May 10, 2021, 11 p.m. | 2.4 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 50.0 ppb (47) | 0.17 ppb (3) | N/A | 3.0 μg/m3 (13) | 47.0 | |
| May 10, 2021, 10 p.m. | 2.7 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 49.0 ppb (46) | 0.2 ppb (3) | N/A | 1.0 μg/m3 (5) | 46.0 | |
| May 10, 2021, 9 p.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 46.0 ppb (43) | 0.17 ppb (3) | N/A | 3.0 μg/m3 (13) | 43.0 | |
| May 10, 2021, 8 p.m. | 1.8 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 43.0 ppb (40) | 0.17 ppb (3) | N/A | 6.0 μg/m3 (25) | 40.0 | |
| May 10, 2021, 7 p.m. | 2.6 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 40.0 ppb (38) | 0.19 ppb (3) | N/A | 5.0 μg/m3 (21) | 38.0 | |
| May 10, 2021, 6 p.m. | 3.3 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 38.0 ppb (36) | 0.21 ppb (3) | N/A | 5.0 μg/m3 (21) | 36.0 | |
| May 10, 2021, 5 p.m. | 4.1 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 34.0 ppb (32) | 0.21 ppb (3) | N/A | 6.0 μg/m3 (25) | 32.0 | |
| May 10, 2021, 4 p.m. | 5.2 ppb (5) | 1.2 ppb (2) | N/A | 4.0 ppb (4) | N/A | 3.0 ppb (5) | 29.0 ppb (27) | 0.22 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, 3 p.m. | 3.7 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 24.0 ppb (23) | 0.23 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 10, 2021, 2 p.m. | 6.7 ppb (7) | 1.4 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 17.0 ppb (16) | 0.24 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 10, 2021, 1 p.m. | 4.3 ppb (5) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 16.0 ppb (15) | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, noon | 4.3 ppb (5) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.23 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, 11 a.m. | 4.7 ppb (5) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 16.0 ppb (15) | 0.23 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 10, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 10, 2021, 9 a.m. | 4.1 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.23 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 10, 2021, 8 a.m. | 4.2 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 10, 2021, 7 a.m. | 4.7 ppb (5) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 20.0 ppb (19) | 0.25 ppb (3) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| May 10, 2021, 6 a.m. | 3.9 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.23 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 10, 2021, 5 a.m. | 4.2 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (23) | 0.24 ppb (3) | N/A | 13.0 μg/m3 (53) | 53.0 | |
| May 10, 2021, 4 a.m. | 4.9 ppb (5) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 25.0 ppb (24) | 0.24 ppb (3) | N/A | 18.0 μg/m3 (64) | 64.0 | |
| May 10, 2021, 3 a.m. | 5.6 ppb (6) | 0.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.24 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 10, 2021, 2 a.m. | 2.4 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (29) | 0.2 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 10, 2021, 1 a.m. | 1.0 ppb (1) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 34.0 ppb (32) | 0.16 ppb (3) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| May 10, 2021, midnight | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 33.0 ppb (31) | 0.16 ppb (3) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| May 9, 2021, 11 p.m. | 1.0 ppb (1) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 33.0 ppb (31) | 0.17 ppb (3) | N/A | 6.0 μg/m3 (25) | 31.0 | |
| May 9, 2021, 10 p.m. | 1.1 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 34.0 ppb (32) | 0.17 ppb (3) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| May 9, 2021, 9 p.m. | 1.4 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 37.0 ppb (35) | 0.17 ppb (3) | N/A | 1.0 μg/m3 (5) | 35.0 | |
| May 9, 2021, 8 p.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 37.0 ppb (35) | 0.17 ppb (3) | N/A | 2.0 μg/m3 (9) | 35.0 | |
| May 9, 2021, 7 p.m. | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 35.0 ppb (33) | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 33.0 | |
| May 9, 2021, 6 p.m. | 1.4 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 33.0 ppb (31) | 0.17 ppb (3) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| May 9, 2021, 5 p.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 32.0 ppb (30) | 0.18 ppb (3) | N/A | 6.0 μg/m3 (25) | 30.0 | |
| May 9, 2021, 4 p.m. | 1.6 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 29.0 ppb (27) | 0.18 ppb (3) | N/A | 6.0 μg/m3 (25) | 27.0 | |
| May 9, 2021, 3 p.m. | 1.6 ppb (2) | 0.4 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 26.0 ppb (25) | 0.18 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, 2 p.m. | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 23.0 ppb (22) | 0.19 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 9, 2021, 1 p.m. | 2.0 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.18 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 9, 2021, noon | 2.2 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.18 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, 11 a.m. | 1.9 ppb (2) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.19 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 9, 2021, 9 a.m. | 3.0 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (2) | 18.0 ppb (17) | 0.2 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 9, 2021, 8 a.m. | 3.1 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 21.0 ppb (20) | 0.22 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 | |
| May 9, 2021, 7 a.m. | 3.4 ppb (4) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 22.0 ppb (21) | 0.22 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 9, 2021, 6 a.m. | 2.4 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 28.0 ppb (26) | 0.19 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 9, 2021, 5 a.m. | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (27) | 0.21 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 9, 2021, 4 a.m. | 2.4 ppb (3) | 0.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 32.0 ppb (30) | 0.19 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 9, 2021, 3 a.m. | 2.8 ppb (3) | 0.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 35.0 ppb (33) | 0.2 ppb (3) | N/A | 8.0 μg/m3 (34) | 34.0 | |
| May 9, 2021, 2 a.m. | 1.6 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 39.0 ppb (37) | 0.17 ppb (3) | N/A | 7.0 μg/m3 (30) | 37.0 | |
| May 9, 2021, 1 a.m. | 1.4 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 41.0 ppb (38) | 0.16 ppb (3) | N/A | 8.0 μg/m3 (34) | 38.0 | |
| May 9, 2021, midnight | 1.4 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 44.0 ppb (41) | 0.14 ppb (2) | N/A | 2.0 μg/m3 (9) | 41.0 | |
| May 8, 2021, 11 p.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 47.0 ppb (44) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (9) | 44.0 | |
| May 8, 2021, 10 p.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 51.0 ppb (48) | 0.16 ppb (3) | N/A | 3.0 μg/m3 (13) | 48.0 | |
| May 8, 2021, 9 p.m. | 1.5 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 53.0 ppb (50) | 0.16 ppb (3) | N/A | 2.0 μg/m3 (9) | 50.0 | |
| May 8, 2021, 8 p.m. | 1.9 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 52.0 ppb (49) | 0.17 ppb (3) | N/A | 2.0 μg/m3 (9) | 49.0 | |
| May 8, 2021, 7 p.m. | 1.7 ppb (2) | 0.3 ppb (1) | N/A | 1.0 ppb (1) | N/A | 1.0 ppb (2) | 50.0 ppb (47) | 0.16 ppb (3) | N/A | 3.0 μg/m3 (13) | 47.0 | |
| May 8, 2021, 6 p.m. | 2.0 ppb (2) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 47.0 ppb (44) | 0.17 ppb (3) | N/A | 3.0 μg/m3 (13) | 44.0 | |
| May 8, 2021, 5 p.m. | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (2) | 43.0 ppb (40) | 0.18 ppb (3) | N/A | 4.0 μg/m3 (17) | 40.0 | |
| May 8, 2021, 4 p.m. | 4.1 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | 2.0 ppb (3) | 37.0 ppb (35) | 0.2 ppb (3) | N/A | 7.0 μg/m3 (30) | 35.0 | |
| May 8, 2021, 3 p.m. | 4.7 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 27.0 ppb (25) | 0.21 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 8, 2021, 2 p.m. | 5.9 ppb (6) | 1.3 ppb (2) | N/A | 5.0 ppb (5) | N/A | 1.0 ppb (2) | 18.0 ppb (17) | 0.24 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 8, 2021, 1 p.m. | 4.7 ppb (5) | 0.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (2) | 14.0 ppb (13) | 0.22 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 8, 2021, noon | 3.9 ppb (4) | 0.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 15.0 ppb (14) | 0.21 ppb (3) | N/A | 7.0 μg/m3 (30) | 30.0 |