Mission Viejo (S&S Eldorado N) CA, US: 33.629991, -117.675875
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 19, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | 0.18 ppb (2) | N/A | -2.7 μg/m3 (0) | 35.0 | |
| Jan. 19, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.18 ppb (2) | N/A | 0.3 μg/m3 (1) | 32.0 | |
| Jan. 19, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.21 ppb (2) | N/A | 10.2 μg/m3 (42) | 42.0 | |
| Jan. 19, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | 0.3 ppb (3) | N/A | 33.1 μg/m3 (95) | 95.0 | |
| Jan. 19, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | 0.24 ppb (3) | N/A | 18.6 μg/m3 (64) | 64.0 | |
| Jan. 19, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | 0.22 ppb (2) | N/A | 8.1 μg/m3 (34) | 34.0 | |
| Jan. 19, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | 0.16 ppb (2) | N/A | 13.6 μg/m3 (53) | 53.0 | |
| Jan. 19, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | 0.14 ppb (2) | N/A | 3.1 μg/m3 (13) | 21.0 | |
| Jan. 19, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | 0.14 ppb (2) | N/A | 5.3 μg/m3 (22) | 22.0 | |
| Jan. 19, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | 0.14 ppb (2) | N/A | -3.9 μg/m3 (0) | 22.0 | |
| Jan. 19, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | 0.16 ppb (2) | N/A | N/A | 21.0 | |
| Jan. 19, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | 0.19 ppb (2) | N/A | N/A | 20.0 | |
| Jan. 19, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | 0.25 ppb (3) | N/A | 4.3 μg/m3 (18) | 18.0 | |
| Jan. 19, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | 0.35 ppb (4) | N/A | 5.6 μg/m3 (23) | 23.0 | |
| Jan. 19, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.5 μg/m3 (2) | 2.0 | |
| Jan. 19, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.5 ppb (6) | N/A | 24.3 μg/m3 (76) | 76.0 | |
| Jan. 19, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | 0.55 ppb (6) | N/A | 23.6 μg/m3 (75) | 75.0 | |
| Jan. 19, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | 0.62 ppb (7) | N/A | 21.3 μg/m3 (70) | 70.0 | |
| Jan. 19, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | 0.56 ppb (6) | N/A | 14.6 μg/m3 (56) | 56.0 | |
| Jan. 19, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | 0.44 ppb (5) | N/A | 18.6 μg/m3 (64) | 64.0 | |
| Jan. 19, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | 0.31 ppb (3) | N/A | 16.1 μg/m3 (59) | 59.0 | |
| Jan. 18, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | 0.25 ppb (3) | N/A | -2.7 μg/m3 (0) | 31.0 | |
| Jan. 18, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | 0.28 ppb (3) | N/A | 2.4 μg/m3 (10) | 29.0 | |
| Jan. 18, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | 0.28 ppb (3) | N/A | 4.2 μg/m3 (18) | 29.0 | |
| Jan. 18, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.26 ppb (3) | N/A | -3.1 μg/m3 (0) | 28.0 | |
| Jan. 18, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | 0.25 ppb (3) | N/A | 12.5 μg/m3 (51) | 51.0 | |
| Jan. 18, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.24 ppb (3) | N/A | 7.2 μg/m3 (30) | 30.0 | |
| Jan. 18, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | 0.18 ppb (2) | N/A | 9.8 μg/m3 (41) | 41.0 | |
| Jan. 18, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | 0.27 ppb (3) | N/A | 11.9 μg/m3 (50) | 50.0 | |
| Jan. 18, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | 0.28 ppb (3) | N/A | 7.5 μg/m3 (31) | 31.0 | |
| Jan. 18, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | 0.19 ppb (2) | N/A | 2.3 μg/m3 (10) | 12.0 | |
| Jan. 18, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | 0.15 ppb (2) | N/A | -3.7 μg/m3 (0) | 14.0 | |
| Jan. 18, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | 0.13 ppb (1) | N/A | -2.6 μg/m3 (0) | 15.0 | |
| Jan. 18, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | 0.15 ppb (2) | N/A | N/A | 15.0 | |
| Jan. 18, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | 0.18 ppb (2) | N/A | -3.6 μg/m3 (0) | 13.0 | |
| Jan. 18, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.25 ppb (3) | N/A | 6.4 μg/m3 (27) | 27.0 | |
| Jan. 18, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | 0.3 ppb (3) | N/A | 25.6 μg/m3 (79) | 79.0 | |
| Jan. 18, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | 0.33 ppb (4) | N/A | 4.1 μg/m3 (17) | 17.0 | |
| Jan. 18, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.5 μg/m3 (55) | 55.0 | |
| Jan. 18, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | 0.44 ppb (5) | N/A | 16.5 μg/m3 (60) | 60.0 | |
| Jan. 18, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | 0.41 ppb (5) | N/A | 15.5 μg/m3 (57) | 57.0 | |
| Jan. 18, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | 0.4 ppb (4) | N/A | 18.5 μg/m3 (64) | 64.0 | |
| Jan. 18, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | 0.33 ppb (4) | N/A | 12.4 μg/m3 (51) | 51.0 | |
| Jan. 18, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | 0.18 ppb (2) | N/A | 6.5 μg/m3 (27) | 29.0 | |
| Jan. 18, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | 0.16 ppb (2) | N/A | 3.1 μg/m3 (13) | 33.0 | |
| Jan. 17, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | 0.12 ppb (1) | N/A | 0.3 μg/m3 (1) | 34.0 | |
| Jan. 17, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | 0.13 ppb (1) | N/A | -0.9 μg/m3 (0) | 33.0 | |
| Jan. 17, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.14 ppb (2) | N/A | N/A | 32.0 | |
| Jan. 17, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.13 ppb (1) | N/A | -3.1 μg/m3 (0) | 32.0 | |
| Jan. 17, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | 0.14 ppb (2) | N/A | N/A | 32.0 | |
| Jan. 17, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.17 ppb (2) | N/A | -3.8 μg/m3 (0) | 28.0 | |
| Jan. 17, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | 0.17 ppb (2) | N/A | 14.4 μg/m3 (55) | 55.0 | |
| Jan. 17, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | 0.31 ppb (3) | N/A | 20.1 μg/m3 (67) | 67.0 | |
| Jan. 17, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.33 ppb (4) | N/A | 4.2 μg/m3 (18) | 18.0 | |
| Jan. 17, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | 0.24 ppb (3) | N/A | 2.7 μg/m3 (11) | 13.0 | |
| Jan. 17, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | 0.11 ppb (1) | N/A | -1.7 μg/m3 (0) | 22.0 | |
| Jan. 17, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | 0.08 ppb (1) | N/A | 3.5 μg/m3 (15) | 26.0 | |
| Jan. 17, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.08 ppb (1) | N/A | -0.2 μg/m3 (0) | 28.0 | |
| Jan. 17, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.08 ppb (1) | N/A | 3.5 μg/m3 (15) | 28.0 | |
| Jan. 17, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.08 ppb (1) | N/A | 6.0 μg/m3 (25) | 28.0 | |
| Jan. 17, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | 0.08 ppb (1) | N/A | 0.2 μg/m3 (1) | 29.0 | |
| Jan. 17, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | 0.1 ppb (1) | N/A | 9.2 μg/m3 (38) | 38.0 | |
| Jan. 17, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.1 μg/m3 (25) | 25.0 | |
| Jan. 17, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | 0.11 ppb (1) | N/A | 8.7 μg/m3 (36) | 36.0 | |
| Jan. 17, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | 0.19 ppb (2) | N/A | 3.9 μg/m3 (16) | 25.0 | |
| Jan. 17, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | 0.18 ppb (2) | N/A | 8.3 μg/m3 (35) | 35.0 | |
| Jan. 17, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | 0.15 ppb (2) | N/A | 7.4 μg/m3 (31) | 31.0 | |
| Jan. 17, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | 0.12 ppb (1) | N/A | 10.1 μg/m3 (42) | 42.0 | |
| Jan. 17, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | 0.15 ppb (2) | N/A | 14.9 μg/m3 (56) | 56.0 | |
| Jan. 16, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | 0.16 ppb (2) | N/A | 4.0 μg/m3 (17) | 37.0 | |
| Jan. 16, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | 0.17 ppb (2) | N/A | 6.0 μg/m3 (25) | 39.0 | |
| Jan. 16, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | 0.22 ppb (2) | N/A | 9.5 μg/m3 (40) | 41.0 | |
| Jan. 16, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | 0.23 ppb (3) | N/A | 7.0 μg/m3 (29) | 41.0 | |
| Jan. 16, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | 0.24 ppb (3) | N/A | 8.2 μg/m3 (34) | 38.0 | |
| Jan. 16, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | 0.23 ppb (3) | N/A | 11.7 μg/m3 (49) | 49.0 | |
| Jan. 16, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | 0.25 ppb (3) | N/A | 26.4 μg/m3 (81) | 81.0 | |
| Jan. 16, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.4 ppb (4) | N/A | 28.5 μg/m3 (85) | 85.0 | |
| Jan. 16, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | 0.47 ppb (5) | N/A | 16.2 μg/m3 (59) | 59.0 | |
| Jan. 16, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | 0.36 ppb (4) | N/A | 13.5 μg/m3 (53) | 53.0 | |
| Jan. 16, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | 0.29 ppb (3) | N/A | 7.8 μg/m3 (32) | 32.0 | |
| Jan. 16, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.31 ppb (3) | N/A | 10.6 μg/m3 (44) | 44.0 | |
| Jan. 16, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | 0.34 ppb (4) | N/A | 21.3 μg/m3 (70) | 70.0 | |
| Jan. 16, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | 0.35 ppb (4) | N/A | 25.2 μg/m3 (78) | 78.0 | |
| Jan. 16, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | 0.36 ppb (4) | N/A | 27.1 μg/m3 (82) | 82.0 | |
| Jan. 16, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | 0.5 ppb (6) | N/A | 25.9 μg/m3 (80) | 80.0 | |
| Jan. 16, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (5) | 0.61 ppb (7) | N/A | 25.9 μg/m3 (80) | 80.0 | |
| Jan. 16, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.3 μg/m3 (59) | 59.0 | |
| Jan. 16, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | 0.64 ppb (7) | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Jan. 16, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | 0.64 ppb (7) | N/A | 35.2 μg/m3 (99) | 99.0 | |
| Jan. 16, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.63 ppb (7) | N/A | 40.2 μg/m3 (112) | 112.0 | |
| Jan. 16, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | 0.6 ppb (7) | N/A | 36.8 μg/m3 (103) | 103.0 | |
| Jan. 16, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | 0.47 ppb (5) | N/A | 44.0 μg/m3 (121) | 121.0 | |
| Jan. 16, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | 0.47 ppb (5) | N/A | 17.7 μg/m3 (62) | 62.0 | |
| Jan. 15, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.47 ppb (5) | N/A | 17.1 μg/m3 (61) | 61.0 | |
| Jan. 15, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | 0.36 ppb (4) | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Jan. 15, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | 0.36 ppb (4) | N/A | 13.2 μg/m3 (53) | 53.0 | |
| Jan. 15, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | 0.34 ppb (4) | N/A | 10.1 μg/m3 (42) | 42.0 | |
| Jan. 15, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | 0.34 ppb (4) | N/A | 5.2 μg/m3 (22) | 34.0 | |
| Jan. 15, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.3 ppb (3) | N/A | 23.9 μg/m3 (75) | 75.0 | |
| Jan. 15, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | 0.55 ppb (6) | N/A | 39.6 μg/m3 (110) | 110.0 | |
| Jan. 15, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | 0.85 ppb (9) | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Jan. 15, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | 0.43 ppb (5) | N/A | 2.6 μg/m3 (11) | 11.0 | |
| Jan. 15, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | 0.3 ppb (3) | N/A | N/A | 9.0 | |
| Jan. 15, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | 0.26 ppb (3) | N/A | 5.6 μg/m3 (23) | 23.0 | |
| Jan. 15, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.26 ppb (3) | N/A | 0.1 μg/m3 (0) | 10.0 | |
| Jan. 15, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | 0.24 ppb (3) | N/A | 9.1 μg/m3 (38) | 38.0 | |
| Jan. 15, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | 0.27 ppb (3) | N/A | 5.7 μg/m3 (24) | 24.0 | |
| Jan. 15, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.31 ppb (3) | N/A | 22.1 μg/m3 (71) | 71.0 | |
| Jan. 15, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.37 ppb (4) | N/A | 9.3 μg/m3 (39) | 39.0 | |
| Jan. 15, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | 0.44 ppb (5) | N/A | 12.8 μg/m3 (52) | 52.0 | |
| Jan. 15, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.6 μg/m3 (66) | 66.0 | |
| Jan. 15, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | 0.52 ppb (6) | N/A | 25.7 μg/m3 (79) | 79.0 | |
| Jan. 15, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | 0.49 ppb (5) | N/A | 22.6 μg/m3 (73) | 73.0 | |
| Jan. 15, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | 0.49 ppb (5) | N/A | 29.8 μg/m3 (88) | 88.0 | |
| Jan. 15, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | 0.42 ppb (5) | N/A | 27.1 μg/m3 (82) | 82.0 | |
| Jan. 15, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | 0.32 ppb (4) | N/A | 10.9 μg/m3 (45) | 45.0 | |
| Jan. 15, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | 0.27 ppb (3) | N/A | 9.7 μg/m3 (40) | 40.0 | |
| Jan. 14, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | 0.26 ppb (3) | N/A | 9.9 μg/m3 (41) | 41.0 | |
| Jan. 14, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | 0.32 ppb (4) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Jan. 14, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | 0.28 ppb (3) | N/A | 10.5 μg/m3 (44) | 44.0 | |
| Jan. 14, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | 0.25 ppb (3) | N/A | 5.7 μg/m3 (24) | 38.0 | |
| Jan. 14, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | 0.24 ppb (3) | N/A | 13.1 μg/m3 (52) | 52.0 | |
| Jan. 14, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | 0.27 ppb (3) | N/A | 12.6 μg/m3 (51) | 51.0 | |
| Jan. 14, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | 0.38 ppb (4) | N/A | 46.7 μg/m3 (128) | 128.0 | |
| Jan. 14, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.8 μg/m3 (94) | 94.0 | |
| Jan. 14, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | 0.42 ppb (5) | N/A | -1.2 μg/m3 (0) | 9.0 | |
| Jan. 14, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | 0.29 ppb (3) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| Jan. 14, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | 0.21 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| Jan. 14, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | 0.2 ppb (2) | N/A | -1.3 μg/m3 (0) | 14.0 | |
| Jan. 14, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | 0.18 ppb (2) | N/A | 6.5 μg/m3 (27) | 27.0 | |
| Jan. 14, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | 0.2 ppb (2) | N/A | 2.2 μg/m3 (9) | 15.0 | |
| Jan. 14, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | 0.23 ppb (3) | N/A | 7.9 μg/m3 (33) | 33.0 | |
| Jan. 14, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | 0.28 ppb (3) | N/A | 13.3 μg/m3 (53) | 53.0 | |
| Jan. 14, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | 0.37 ppb (4) | N/A | 16.4 μg/m3 (59) | 59.0 | |
| Jan. 14, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.3 μg/m3 (55) | 55.0 | |
| Jan. 14, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | 0.36 ppb (4) | N/A | 15.7 μg/m3 (58) | 58.0 | |
| Jan. 14, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | 0.43 ppb (5) | N/A | 16.8 μg/m3 (60) | 60.0 | |
| Jan. 14, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | 0.41 ppb (5) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Jan. 14, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | 0.3 ppb (3) | N/A | 22.2 μg/m3 (72) | 72.0 | |
| Jan. 14, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | 0.24 ppb (3) | N/A | 14.7 μg/m3 (56) | 56.0 | |
| Jan. 14, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | 0.18 ppb (2) | N/A | 9.8 μg/m3 (41) | 41.0 | |
| Jan. 13, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | 0.17 ppb (2) | N/A | 5.0 μg/m3 (21) | 36.0 | |
| Jan. 13, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | 0.17 ppb (2) | N/A | 0.2 μg/m3 (1) | 37.0 | |
| Jan. 13, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | 0.17 ppb (2) | N/A | 0.1 μg/m3 (0) | 35.0 | |
| Jan. 13, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | 0.16 ppb (2) | N/A | 4.0 μg/m3 (17) | 35.0 | |
| Jan. 13, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.17 ppb (2) | N/A | -2.3 μg/m3 (0) | 32.0 | |
| Jan. 13, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | 0.18 ppb (2) | N/A | 5.5 μg/m3 (23) | 32.0 | |
| Jan. 13, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | 0.15 ppb (2) | N/A | 19.2 μg/m3 (65) | 65.0 | |
| Jan. 13, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | 0.49 ppb (5) | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Jan. 13, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | 0.31 ppb (3) | N/A | 9.2 μg/m3 (38) | 38.0 | |
| Jan. 13, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | 0.18 ppb (2) | N/A | N/A | 23.0 | |
| Jan. 13, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | 0.16 ppb (2) | N/A | 5.6 μg/m3 (23) | 23.0 | |
| Jan. 13, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | 0.15 ppb (2) | N/A | 8.6 μg/m3 (36) | 36.0 | |
| Jan. 13, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | 0.14 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 13, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.15 ppb (2) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| Jan. 13, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.16 ppb (2) | N/A | 10.9 μg/m3 (45) | 45.0 | |
| Jan. 13, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.18 ppb (2) | N/A | 10.4 μg/m3 (43) | 43.0 | |
| Jan. 13, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | 0.21 ppb (2) | N/A | 12.7 μg/m3 (51) | 51.0 | |
| Jan. 13, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.2 μg/m3 (57) | 57.0 | |
| Jan. 13, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | 0.4 ppb (4) | N/A | 21.5 μg/m3 (70) | 70.0 | |
| Jan. 13, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | 0.44 ppb (5) | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Jan. 13, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | 0.38 ppb (4) | N/A | 20.9 μg/m3 (69) | 69.0 | |
| Jan. 13, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | 0.3 ppb (3) | N/A | 18.5 μg/m3 (64) | 64.0 | |
| Jan. 13, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | 0.2 ppb (2) | N/A | 17.5 μg/m3 (62) | 62.0 | |
| Jan. 13, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | 0.17 ppb (2) | N/A | 14.1 μg/m3 (54) | 54.0 | |
| Jan. 12, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | 0.16 ppb (2) | N/A | 0.3 μg/m3 (1) | 36.0 | |
| Jan. 12, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | 0.17 ppb (2) | N/A | 0.2 μg/m3 (1) | 36.0 | |
| Jan. 12, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | 0.17 ppb (2) | N/A | 3.2 μg/m3 (13) | 35.0 |