Modesto (Downtown) CA, US: 37.642165, -120.994212
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 21, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 56.1 μg/m3 (52) | 15.0 μg/m3 (58) | 58.0 | |
| Jan. 21, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 49.4 μg/m3 (46) | 20.0 μg/m3 (68) | 68.0 | |
| Jan. 21, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 56.6 μg/m3 (52) | 23.0 μg/m3 (74) | 74.0 | |
| Jan. 21, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 54.9 μg/m3 (51) | 15.0 μg/m3 (58) | 58.0 | |
| Jan. 21, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 48.9 μg/m3 (46) | 18.0 μg/m3 (64) | 64.0 | |
| Jan. 21, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 58.4 μg/m3 (53) | 12.0 μg/m3 (50) | 53.0 | |
| Jan. 21, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 52.6 μg/m3 (49) | 12.0 μg/m3 (50) | 50.0 | |
| Jan. 21, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 41.6 μg/m3 (39) | 15.0 μg/m3 (58) | 58.0 | |
| Jan. 21, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 40.6 μg/m3 (38) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 21, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | N/A | 35.2 μg/m3 (33) | 16.0 μg/m3 (60) | 60.0 | |
| Jan. 21, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 34.0 μg/m3 (32) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 21, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 86.9 μg/m3 (67) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 21, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 70.6 μg/m3 (59) | 24.0 μg/m3 (77) | 77.0 | |
| Jan. 21, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 65.8 μg/m3 (57) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 21, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 59.8 μg/m3 (54) | 27.0 μg/m3 (83) | 83.0 | |
| Jan. 21, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 53.5 μg/m3 (50) | 23.0 μg/m3 (74) | 74.0 | |
| Jan. 21, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 41.5 μg/m3 (39) | 11.0 μg/m3 (46) | 46.0 | |
| Jan. 21, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 34.2 μg/m3 (32) | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 21, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 34.1 μg/m3 (32) | 13.0 μg/m3 (53) | 53.0 | |
| Jan. 21, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 40.4 μg/m3 (38) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 21, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 46.8 μg/m3 (44) | 6.0 μg/m3 (25) | 44.0 | |
| Jan. 20, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 43.2 μg/m3 (40) | 6.0 μg/m3 (25) | 40.0 | |
| Jan. 20, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 39.2 μg/m3 (37) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 20, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 24.2 μg/m3 (23) | 8.0 μg/m3 (34) | 34.0 | |
| Jan. 20, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 33.0 μg/m3 (31) | 8.0 μg/m3 (34) | 34.0 | |
| Jan. 20, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 39.5 μg/m3 (37) | 7.0 μg/m3 (30) | 37.0 | |
| Jan. 20, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 53.4 μg/m3 (50) | 9.0 μg/m3 (38) | 50.0 | |
| Jan. 20, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 66.6 μg/m3 (57) | 13.0 μg/m3 (53) | 57.0 | |
| Jan. 20, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 111.5 μg/m3 (79) | 17.0 μg/m3 (62) | 79.0 | |
| Jan. 20, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 122.3 μg/m3 (85) | 21.0 μg/m3 (70) | 85.0 | |
| Jan. 20, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | N/A | 100.2 μg/m3 (74) | 25.0 μg/m3 (79) | 79.0 | |
| Jan. 20, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 115.0 μg/m3 (81) | 22.0 μg/m3 (72) | 81.0 | |
| Jan. 20, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 130.0 μg/m3 (89) | 21.0 μg/m3 (70) | 89.0 | |
| Jan. 20, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 127.2 μg/m3 (87) | 22.0 μg/m3 (72) | 87.0 | |
| Jan. 20, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 99.2 μg/m3 (73) | 17.0 μg/m3 (62) | 73.0 | |
| Jan. 20, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 41.5 μg/m3 (39) | 8.0 μg/m3 (34) | 39.0 | |
| Jan. 20, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 49.5 μg/m3 (46) | 7.0 μg/m3 (30) | 46.0 | |
| Jan. 20, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 49.7 μg/m3 (47) | 8.0 μg/m3 (34) | 47.0 | |
| Jan. 20, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 45.6 μg/m3 (43) | 8.0 μg/m3 (34) | 43.0 | |
| Jan. 20, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 33.0 μg/m3 (31) | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 20, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 24.3 μg/m3 (23) | 8.0 μg/m3 (34) | 34.0 | |
| Jan. 20, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 27.0 μg/m3 (25) | 7.0 μg/m3 (30) | 30.0 | |
| Jan. 20, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 31.8 μg/m3 (30) | 7.0 μg/m3 (30) | 30.0 | |
| Jan. 20, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 26.5 μg/m3 (25) | 4.0 μg/m3 (17) | 33.0 | |
| Jan. 20, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 30.4 μg/m3 (29) | 4.0 μg/m3 (17) | 38.0 | |
| Jan. 19, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 19.5 μg/m3 (19) | 4.0 μg/m3 (17) | 43.0 | |
| Jan. 19, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 19.0 μg/m3 (18) | 6.0 μg/m3 (25) | 44.0 | |
| Jan. 19, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (42) | N/A | 23.6 μg/m3 (22) | 7.0 μg/m3 (30) | 42.0 | |
| Jan. 19, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 17.6 μg/m3 (17) | 9.0 μg/m3 (38) | 41.0 | |
| Jan. 19, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 31.3 μg/m3 (29) | 6.0 μg/m3 (25) | 38.0 | |
| Jan. 19, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 38.0 μg/m3 (36) | 6.0 μg/m3 (25) | 37.0 | |
| Jan. 19, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 54.1 μg/m3 (51) | 7.0 μg/m3 (30) | 51.0 | |
| Jan. 19, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 39.3 μg/m3 (37) | 7.0 μg/m3 (30) | 37.0 | |
| Jan. 19, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 37.4 μg/m3 (35) | 7.0 μg/m3 (30) | 35.0 | |
| Jan. 19, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 28.0 μg/m3 (26) | 5.0 μg/m3 (21) | 32.0 | |
| Jan. 19, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 19.9 μg/m3 (19) | 2.0 μg/m3 (9) | 31.0 | |
| Jan. 19, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.6 μg/m3 (31) | 2.0 μg/m3 (9) | 31.0 | |
| Jan. 19, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 18.0 μg/m3 (17) | 5.0 μg/m3 (21) | 34.0 | |
| Jan. 19, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 24.1 μg/m3 (23) | 4.0 μg/m3 (17) | 36.0 | |
| Jan. 19, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 51.9 μg/m3 (49) | 4.0 μg/m3 (17) | 49.0 | |
| Jan. 19, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 37.9 μg/m3 (36) | 3.0 μg/m3 (13) | 36.0 | |
| Jan. 19, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 17.2 μg/m3 (16) | 4.0 μg/m3 (17) | 32.0 | |
| Jan. 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 12.1 μg/m3 (12) | 7.0 μg/m3 (30) | 33.0 | |
| Jan. 19, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 13.5 μg/m3 (13) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 19, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 22.8 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 19, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 27.2 μg/m3 (26) | 8.0 μg/m3 (34) | 34.0 | |
| Jan. 19, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 29.0 μg/m3 (27) | 8.0 μg/m3 (34) | 34.0 | |
| Jan. 19, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 23.8 μg/m3 (23) | 7.0 μg/m3 (30) | 30.0 | |
| Jan. 19, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 25.3 μg/m3 (24) | 8.0 μg/m3 (34) | 37.0 | |
| Jan. 18, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 40.2 μg/m3 (38) | 7.0 μg/m3 (30) | 38.0 | |
| Jan. 18, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 36.9 μg/m3 (35) | 5.0 μg/m3 (21) | 38.0 | |
| Jan. 18, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 30.3 μg/m3 (29) | 6.0 μg/m3 (25) | 38.0 | |
| Jan. 18, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | N/A | 32.1 μg/m3 (30) | 7.0 μg/m3 (30) | 37.0 | |
| Jan. 18, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 37.8 μg/m3 (35) | 8.0 μg/m3 (34) | 35.0 | |
| Jan. 18, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 26.3 μg/m3 (25) | 5.0 μg/m3 (21) | 25.0 | |
| Jan. 18, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 36.6 μg/m3 (34) | 7.0 μg/m3 (30) | 34.0 | |
| Jan. 18, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 26.9 μg/m3 (25) | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 18, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 37.0 μg/m3 (35) | 25.0 μg/m3 (79) | 79.0 | |
| Jan. 18, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 58.7 μg/m3 (53) | 48.0 μg/m3 (132) | 132.0 | |
| Jan. 18, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 53.3 μg/m3 (50) | 38.0 μg/m3 (108) | 108.0 | |
| Jan. 18, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 48.3 μg/m3 (45) | 47.0 μg/m3 (130) | 130.0 | |
| Jan. 18, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 58.0 μg/m3 (53) | 47.0 μg/m3 (130) | 130.0 | |
| Jan. 18, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 60.8 μg/m3 (54) | 52.0 μg/m3 (142) | 142.0 | |
| Jan. 18, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 78.4 μg/m3 (63) | 65.0 μg/m3 (156) | 156.0 | |
| Jan. 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 84.2 μg/m3 (66) | 68.0 μg/m3 (158) | 158.0 | |
| Jan. 18, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 90.4 μg/m3 (69) | 69.0 μg/m3 (158) | 158.0 | |
| Jan. 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 81.9 μg/m3 (65) | 57.0 μg/m3 (152) | 152.0 | |
| Jan. 18, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 77.3 μg/m3 (63) | 53.0 μg/m3 (145) | 145.0 | |
| Jan. 18, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 69.5 μg/m3 (59) | 55.0 μg/m3 (150) | 150.0 | |
| Jan. 18, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 76.5 μg/m3 (62) | 45.0 μg/m3 (125) | 125.0 | |
| Jan. 18, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 51.6 μg/m3 (48) | 32.0 μg/m3 (93) | 93.0 | |
| Jan. 18, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 36.2 μg/m3 (34) | 20.0 μg/m3 (68) | 68.0 | |
| Jan. 18, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 22.4 μg/m3 (21) | 19.0 μg/m3 (66) | 66.0 | |
| Jan. 17, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 29.3 μg/m3 (28) | 19.0 μg/m3 (66) | 66.0 | |
| Jan. 17, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 28.5 μg/m3 (27) | 22.0 μg/m3 (72) | 72.0 | |
| Jan. 17, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 41.3 μg/m3 (39) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 17, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | N/A | 48.7 μg/m3 (46) | 36.0 μg/m3 (103) | 103.0 | |
| Jan. 17, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 63.6 μg/m3 (56) | 52.0 μg/m3 (142) | 142.0 | |
| Jan. 17, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 76.7 μg/m3 (62) | 58.0 μg/m3 (153) | 153.0 | |
| Jan. 17, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 70.2 μg/m3 (59) | 59.0 μg/m3 (153) | 153.0 | |
| Jan. 17, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 61.9 μg/m3 (55) | 49.0 μg/m3 (135) | 135.0 | |
| Jan. 17, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 59.3 μg/m3 (54) | 46.0 μg/m3 (127) | 127.0 | |
| Jan. 17, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 55.1 μg/m3 (52) | 47.0 μg/m3 (130) | 130.0 | |
| Jan. 17, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 50.8 μg/m3 (48) | 44.0 μg/m3 (122) | 122.0 | |
| Jan. 17, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 60.2 μg/m3 (54) | 44.0 μg/m3 (122) | 122.0 | |
| Jan. 17, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 50.0 μg/m3 (47) | 46.0 μg/m3 (127) | 127.0 | |
| Jan. 17, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 63.3 μg/m3 (56) | 43.0 μg/m3 (120) | 120.0 | |
| Jan. 17, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | N/A | 57.1 μg/m3 (53) | 45.0 μg/m3 (125) | 125.0 | |
| Jan. 17, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 63.3 μg/m3 (56) | 53.0 μg/m3 (145) | 145.0 | |
| Jan. 17, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 71.3 μg/m3 (60) | 59.0 μg/m3 (153) | 153.0 | |
| Jan. 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 79.0 μg/m3 (63) | 55.0 μg/m3 (150) | 150.0 | |
| Jan. 17, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 76.8 μg/m3 (62) | 58.0 μg/m3 (153) | 153.0 | |
| Jan. 17, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 66.0 μg/m3 (57) | 50.0 μg/m3 (137) | 137.0 | |
| Jan. 17, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 71.2 μg/m3 (60) | 50.0 μg/m3 (137) | 137.0 | |
| Jan. 17, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 52.7 μg/m3 (49) | 40.0 μg/m3 (113) | 113.0 | |
| Jan. 17, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 41.4 μg/m3 (39) | 31.0 μg/m3 (91) | 91.0 | |
| Jan. 17, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 34.0 μg/m3 (32) | 17.0 μg/m3 (62) | 62.0 | |
| Jan. 16, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 14.4 μg/m3 (14) | 7.0 μg/m3 (30) | 30.0 | |
| Jan. 16, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 17.6 μg/m3 (17) | 10.0 μg/m3 (42) | 42.0 | |
| Jan. 16, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | N/A | 35.3 μg/m3 (33) | 24.0 μg/m3 (77) | 77.0 | |
| Jan. 16, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 31.0 μg/m3 (29) | 26.0 μg/m3 (81) | 81.0 | |
| Jan. 16, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 42.0 μg/m3 (39) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 16, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | N/A | 38.3 μg/m3 (36) | 30.0 μg/m3 (89) | 89.0 | |
| Jan. 16, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 56.2 μg/m3 (52) | 35.0 μg/m3 (100) | 100.0 | |
| Jan. 16, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 38.8 μg/m3 (36) | 30.0 μg/m3 (89) | 89.0 | |
| Jan. 16, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 34.0 μg/m3 (32) | 26.0 μg/m3 (81) | 81.0 | |
| Jan. 16, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | 38.5 μg/m3 (36) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 16, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | 41.3 μg/m3 (39) | 34.0 μg/m3 (98) | 98.0 | |
| Jan. 16, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 41.5 μg/m3 (39) | 33.0 μg/m3 (95) | 95.0 | |
| Jan. 16, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 30.3 μg/m3 (29) | 31.0 μg/m3 (91) | 91.0 | |
| Jan. 16, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 37.4 μg/m3 (35) | 32.0 μg/m3 (93) | 93.0 | |
| Jan. 16, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 36.1 μg/m3 (34) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 16, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 42.9 μg/m3 (40) | 31.0 μg/m3 (91) | 91.0 | |
| Jan. 16, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 39.4 μg/m3 (37) | 30.0 μg/m3 (89) | 89.0 | |
| Jan. 16, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 38.1 μg/m3 (36) | 31.0 μg/m3 (91) | 91.0 | |
| Jan. 16, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 42.3 μg/m3 (40) | 29.0 μg/m3 (87) | 87.0 | |
| Jan. 16, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 40.0 μg/m3 (38) | 29.0 μg/m3 (87) | 87.0 | |
| Jan. 16, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 39.5 μg/m3 (37) | 30.0 μg/m3 (89) | 89.0 | |
| Jan. 16, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 39.8 μg/m3 (37) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 16, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 48.1 μg/m3 (45) | 30.0 μg/m3 (89) | 89.0 | |
| Jan. 16, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 53.9 μg/m3 (50) | 37.0 μg/m3 (105) | 105.0 | |
| Jan. 15, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 56.7 μg/m3 (52) | 31.0 μg/m3 (91) | 91.0 | |
| Jan. 15, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 54.2 μg/m3 (51) | 33.0 μg/m3 (95) | 95.0 | |
| Jan. 15, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | 1.08 ppb (13) | 49.2 μg/m3 (46) | 40.0 μg/m3 (113) | 113.0 | |
| Jan. 15, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | 1.05 ppb (13) | 46.8 μg/m3 (44) | 41.0 μg/m3 (115) | 115.0 | |
| Jan. 15, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | 1.03 ppb (12) | 51.1 μg/m3 (48) | 39.0 μg/m3 (110) | 110.0 | |
| Jan. 15, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | 1.03 ppb (12) | 37.0 μg/m3 (35) | 25.0 μg/m3 (79) | 79.0 | |
| Jan. 15, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | 1.03 ppb (12) | 32.2 μg/m3 (30) | 25.0 μg/m3 (79) | 79.0 | |
| Jan. 15, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | 1.1 ppb (13) | 33.4 μg/m3 (31) | 24.0 μg/m3 (77) | 77.0 | |
| Jan. 15, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.08 ppb (13) | 15.5 μg/m3 (15) | 15.0 μg/m3 (58) | 58.0 | |
| Jan. 15, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.07 ppb (13) | 21.3 μg/m3 (20) | 11.0 μg/m3 (46) | 46.0 | |
| Jan. 15, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.05 ppb (13) | 26.5 μg/m3 (25) | 23.0 μg/m3 (74) | 74.0 | |
| Jan. 15, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 μg/m3 (33) | 29.0 μg/m3 (87) | 87.0 | |
| Jan. 15, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.19 ppb (14) | 37.3 μg/m3 (35) | 25.0 μg/m3 (79) | 79.0 | |
| Jan. 15, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.11 ppb (13) | 37.9 μg/m3 (36) | 25.0 μg/m3 (79) | 79.0 | |
| Jan. 15, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.21 ppb (14) | 35.4 μg/m3 (33) | 27.0 μg/m3 (83) | 83.0 | |
| Jan. 15, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.33 ppb (15) | 36.9 μg/m3 (35) | 24.0 μg/m3 (77) | 77.0 | |
| Jan. 15, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.44 ppb (16) | 45.0 μg/m3 (42) | 37.0 μg/m3 (105) | 105.0 | |
| Jan. 15, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.62 ppb (19) | 44.1 μg/m3 (41) | 30.0 μg/m3 (89) | 89.0 | |
| Jan. 15, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.44 ppb (16) | 46.7 μg/m3 (44) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 15, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.5 ppb (18) | 47.4 μg/m3 (44) | 28.0 μg/m3 (85) | 85.0 | |
| Jan. 15, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.64 ppb (19) | 43.5 μg/m3 (41) | 19.0 μg/m3 (66) | 66.0 | |
| Jan. 15, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | 1.43 ppb (16) | 38.7 μg/m3 (36) | 11.0 μg/m3 (46) | 46.0 | |
| Jan. 15, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | 1.17 ppb (14) | 31.9 μg/m3 (30) | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 15, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | 1.0 ppb (12) | 30.0 μg/m3 (28) | 13.0 μg/m3 (53) | 53.0 | |
| Jan. 14, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| Jan. 14, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | 0.95 ppb (11) | 22.4 μg/m3 (21) | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 14, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | 0.94 ppb (11) | 17.3 μg/m3 (17) | N/A | 21.0 |