Columbia Falls (Talbot Rd) MT, US: 48.363694, -114.189272
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 7, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.2 μg/m3 (14) | 14.0 | |
| March 7, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 5.2 μg/m3 (22) | 22.0 | |
| March 7, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (13) | 5.2 μg/m3 (22) | 22.0 | |
| March 7, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (12) | 3.7 μg/m3 (16) | 16.0 | |
| March 6, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (14) | 7.2 μg/m3 (31) | 31.0 | |
| March 6, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (13) | 8.4 μg/m3 (36) | 36.0 | |
| March 6, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (15) | 7.7 μg/m3 (33) | 33.0 | |
| March 6, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 μg/m3 (33) | 17.4 μg/m3 (63) | 63.0 | |
| March 6, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 μg/m3 (20) | 17.2 μg/m3 (62) | 62.0 | |
| March 6, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 μg/m3 (37) | 9.6 μg/m3 (40) | 40.0 | |
| March 6, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 μg/m3 (40) | 14.4 μg/m3 (56) | 56.0 | |
| March 6, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 μg/m3 (34) | 10.4 μg/m3 (44) | 44.0 | |
| March 6, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 μg/m3 (24) | 11.8 μg/m3 (50) | 50.0 | |
| March 6, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 μg/m3 (22) | 12.0 μg/m3 (50) | 50.0 | |
| March 6, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 μg/m3 (25) | 11.8 μg/m3 (50) | 50.0 | |
| March 6, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (13) | 11.6 μg/m3 (49) | 49.0 | |
| March 6, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (13) | 11.8 μg/m3 (50) | 50.0 | |
| March 6, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 μg/m3 (21) | 12.7 μg/m3 (53) | 53.0 | |
| March 6, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 μg/m3 (24) | 16.7 μg/m3 (61) | 61.0 | |
| March 6, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 μg/m3 (52) | 26.0 μg/m3 (81) | 81.0 | |
| March 6, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 μg/m3 (34) | 23.4 μg/m3 (75) | 75.0 | |
| March 6, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 μg/m3 (49) | 25.8 μg/m3 (80) | 80.0 | |
| March 6, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 μg/m3 (56) | 26.5 μg/m3 (82) | 82.0 | |
| March 6, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 135.0 μg/m3 (91) | 34.9 μg/m3 (99) | 99.0 | |
| March 6, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 159.0 μg/m3 (103) | 37.6 μg/m3 (107) | 107.0 | |
| March 6, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 40.4 μg/m3 (114) | 114.0 | |
| March 6, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 82.0 μg/m3 (65) | 11.3 μg/m3 (48) | 65.0 | |
| March 6, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 μg/m3 (28) | 7.4 μg/m3 (31) | 31.0 | |
| March 5, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 μg/m3 (28) | 8.8 μg/m3 (37) | 37.0 | |
| March 5, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 μg/m3 (44) | 11.0 μg/m3 (46) | 46.0 | |
| March 5, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 μg/m3 (25) | 9.2 μg/m3 (39) | 39.0 | |
| March 5, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 μg/m3 (26) | 6.9 μg/m3 (29) | 29.0 | |
| March 5, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 μg/m3 (30) | 14.4 μg/m3 (56) | 56.0 | |
| March 5, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 μg/m3 (49) | 15.4 μg/m3 (58) | 58.0 | |
| March 5, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 μg/m3 (52) | 30.4 μg/m3 (90) | 90.0 | |
| March 5, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 μg/m3 (32) | 16.7 μg/m3 (61) | 61.0 | |
| March 5, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 110.0 μg/m3 (79) | 16.7 μg/m3 (61) | 79.0 | |
| March 5, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 72.0 μg/m3 (60) | 14.4 μg/m3 (56) | 60.0 | |
| March 5, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 μg/m3 (37) | 8.6 μg/m3 (36) | 37.0 | |
| March 5, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (11) | 6.9 μg/m3 (29) | 29.0 | |
| March 5, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 μg/m3 (19) | 15.4 μg/m3 (58) | 58.0 | |
| March 5, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 μg/m3 (26) | 16.4 μg/m3 (61) | 61.0 | |
| March 5, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 μg/m3 (26) | 13.2 μg/m3 (54) | 54.0 | |
| March 5, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 μg/m3 (33) | 12.5 μg/m3 (52) | 52.0 | |
| March 5, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 μg/m3 (24) | 15.9 μg/m3 (59) | 59.0 | |
| March 5, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 μg/m3 (35) | 10.6 μg/m3 (45) | 45.0 | |
| March 5, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 μg/m3 (41) | 10.1 μg/m3 (43) | 43.0 | |
| March 5, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 μg/m3 (59) | 13.2 μg/m3 (54) | 59.0 | |
| March 5, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 115.0 μg/m3 (81) | 22.6 μg/m3 (74) | 81.0 | |
| March 5, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 114.0 μg/m3 (81) | 19.4 μg/m3 (67) | 81.0 | |
| March 5, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 76.0 μg/m3 (62) | 37.7 μg/m3 (107) | 107.0 | |
| March 5, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 3.8 μg/m3 (16) | 16.0 | |
| March 4, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 2.9 μg/m3 (13) | 13.0 | |
| March 4, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 μg/m3 (20) | 3.4 μg/m3 (15) | 20.0 | |
| March 4, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (13) | 2.9 μg/m3 (13) | 13.0 | |
| March 4, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 μg/m3 (16) | 2.7 μg/m3 (12) | 16.0 | |
| March 4, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (17) | 8.4 μg/m3 (36) | 36.0 | |
| March 4, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (11) | 8.6 μg/m3 (36) | 36.0 | |
| March 4, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (6) | 1.7 μg/m3 (8) | 8.0 | |
| March 4, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | -3.1 μg/m3 (0) | 4.0 | |
| March 4, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (6) | -3.4 μg/m3 (0) | 6.0 | |
| March 4, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (7) | -1.3 μg/m3 (0) | 7.0 | |
| March 4, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 0.7 μg/m3 (3) | 4.0 | |
| March 4, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 4.9 μg/m3 (21) | 21.0 | |
| March 4, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 4.9 μg/m3 (21) | 21.0 | |
| March 4, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.7 μg/m3 (12) | 12.0 | |
| March 4, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.0 μg/m3 (9) | 9.0 | |
| March 4, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (6) | 1.9 μg/m3 (8) | 8.0 | |
| March 4, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (7) | 2.9 μg/m3 (13) | 13.0 | |
| March 4, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.9 μg/m3 (13) | 13.0 | |
| March 4, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.4 μg/m3 (19) | 19.0 | |
| March 4, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (17) | 5.7 μg/m3 (24) | 24.0 | |
| March 4, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.4 μg/m3 (23) | 23.0 | |
| March 4, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 109.0 μg/m3 (78) | 21.4 μg/m3 (71) | 78.0 | |
| March 4, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 70.0 μg/m3 (59) | 7.4 μg/m3 (31) | 59.0 | |
| March 4, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (13) | 3.7 μg/m3 (16) | 16.0 | |
| March 3, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (11) | 4.2 μg/m3 (18) | 18.0 | |
| March 3, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (9) | 3.4 μg/m3 (15) | 15.0 | |
| March 3, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| March 3, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 μg/m3 (33) | 4.9 μg/m3 (21) | 33.0 | |
| March 3, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | |
| March 3, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 μg/m3 (28) | 10.6 μg/m3 (45) | 45.0 | |
| March 3, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 μg/m3 (36) | 14.0 μg/m3 (55) | 55.0 | |
| March 3, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 μg/m3 (38) | 13.7 μg/m3 (55) | 55.0 | |
| March 3, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 μg/m3 (48) | 19.7 μg/m3 (67) | 67.0 | |
| March 3, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 μg/m3 (48) | 14.7 μg/m3 (57) | 57.0 | |
| March 3, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 μg/m3 (19) | 7.4 μg/m3 (31) | 31.0 | |
| March 3, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 6.7 μg/m3 (28) | 28.0 | |
| March 3, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 8.2 μg/m3 (35) | 35.0 | |
| March 3, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (8) | 9.1 μg/m3 (38) | 38.0 | |
| March 3, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 μg/m3 (18) | 7.7 μg/m3 (33) | 33.0 | |
| March 3, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 μg/m3 (20) | 8.6 μg/m3 (36) | 36.0 | |
| March 3, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 6.4 μg/m3 (27) | 27.0 | |
| March 3, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 3.2 μg/m3 (14) | 14.0 | |
| March 3, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 2.9 μg/m3 (13) | 13.0 | |
| March 3, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 2.0 μg/m3 (9) | 9.0 | |
| March 3, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (7) | 4.4 μg/m3 (19) | 19.0 | |
| March 3, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 5.4 μg/m3 (23) | 23.0 | |
| March 3, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (12) | 4.2 μg/m3 (18) | 18.0 | |
| March 3, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (12) | 3.4 μg/m3 (15) | 15.0 | |
| March 2, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 2.0 μg/m3 (9) | 10.0 | |
| March 2, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (11) | 2.2 μg/m3 (10) | 11.0 | |
| March 2, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | 0.5 μg/m3 (3) | 10.0 | |
| March 2, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (7) | 0.7 μg/m3 (3) | 7.0 | |
| March 2, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (6) | 1.2 μg/m3 (5) | 6.0 | |
| March 2, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 2.5 μg/m3 (11) | 11.0 | |
| March 2, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 2.2 μg/m3 (10) | 10.0 | |
| March 2, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 1.2 μg/m3 (5) | 5.0 | |
| March 2, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 2.0 μg/m3 (9) | 9.0 | |
| March 2, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 1.5 μg/m3 (7) | 7.0 | |
| March 2, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 1.9 μg/m3 (8) | 8.0 | |
| March 2, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | 0.7 μg/m3 (3) | 3.0 | |
| March 2, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 1.0 μg/m3 (5) | 5.0 | |
| March 2, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.2 μg/m3 (10) | 10.0 | |
| March 2, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 2.2 μg/m3 (10) | 10.0 | |
| March 2, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | 1.9 μg/m3 (8) | 8.0 | |
| March 2, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.2 μg/m3 (10) | 10.0 | |
| March 2, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.7 μg/m3 (12) | 12.0 | |
| March 2, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 3.7 μg/m3 (16) | 16.0 | |
| March 2, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 1.2 μg/m3 (5) | 5.0 | |
| March 2, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | -0.9 μg/m3 (0) | 1.0 | |
| March 2, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 1.7 μg/m3 (8) | 8.0 | |
| March 2, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 3.7 μg/m3 (16) | 16.0 | |
| March 2, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 2.5 μg/m3 (11) | 11.0 | |
| March 1, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | -0.4 μg/m3 (0) | 2.0 | |
| March 1, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (8) | -1.1 μg/m3 (0) | 8.0 | |
| March 1, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (8) | -0.6 μg/m3 (0) | 8.0 | |
| March 1, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 2.7 μg/m3 (12) | 12.0 | |
| March 1, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (7) | 6.2 μg/m3 (26) | 26.0 | |
| March 1, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (8) | 6.9 μg/m3 (29) | 29.0 | |
| March 1, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (8) | 4.9 μg/m3 (21) | 21.0 | |
| March 1, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (6) | 2.5 μg/m3 (11) | 11.0 | |
| March 1, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 1.7 μg/m3 (8) | 8.0 | |
| March 1, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | 1.5 μg/m3 (7) | 7.0 | |
| March 1, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | 0.7 μg/m3 (3) | 3.0 | |
| March 1, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | -0.4 μg/m3 (0) | 0.0 | |
| March 1, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 0.0 μg/m3 (0) | 0.0 | |
| March 1, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 0.5 μg/m3 (3) | 3.0 | |
| March 1, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 2.0 μg/m3 (9) | 9.0 | |
| March 1, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 3.5 μg/m3 (15) | 15.0 | |
| March 1, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.2 μg/m3 (10) | 10.0 | |
| March 1, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 2.0 μg/m3 (9) | 9.0 | |
| March 1, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 5.4 μg/m3 (23) | 23.0 | |
| March 1, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 4.2 μg/m3 (18) | 18.0 | |
| March 1, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 2.2 μg/m3 (10) | 10.0 | |
| March 1, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 3.2 μg/m3 (14) | 14.0 | |
| March 1, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.2 μg/m3 (10) | 10.0 | |
| March 1, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 1.5 μg/m3 (7) | 7.0 | |
| Feb. 28, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 1.0 μg/m3 (5) | 5.0 | |
| Feb. 28, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 1.2 μg/m3 (5) | 5.0 | |
| Feb. 28, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 1.5 μg/m3 (7) | 7.0 | |
| Feb. 28, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 1.9 μg/m3 (8) | 8.0 | |
| Feb. 28, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | 4.9 μg/m3 (21) | 21.0 | |
| Feb. 28, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 6.4 μg/m3 (27) | 27.0 | |
| Feb. 28, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | 1.2 μg/m3 (5) | 5.0 | |
| Feb. 28, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (10) | -1.6 μg/m3 (0) | 10.0 | |
| Feb. 28, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (9) | -3.1 μg/m3 (0) | 9.0 | |
| Feb. 28, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (3) | -3.1 μg/m3 (0) | 3.0 | |
| Feb. 28, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | 0.2 μg/m3 (1) | 5.0 | |
| Feb. 28, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (5) | -0.4 μg/m3 (0) | 5.0 | |
| Feb. 28, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (4) | -1.3 μg/m3 (0) | 4.0 | |
| Feb. 28, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | -1.3 μg/m3 (0) | 2.0 | |
| Feb. 28, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | 0.7 μg/m3 (3) | 3.0 | |
| Feb. 28, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 0.7 μg/m3 (3) | 3.0 | |
| Feb. 28, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | -3.1 μg/m3 (0) | 2.0 | |
| Feb. 28, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | -2.6 μg/m3 (0) | 2.0 | |
| Feb. 28, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (1) | 2.0 μg/m3 (9) | 9.0 | |
| Feb. 28, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (2) | 2.9 μg/m3 (13) | 13.0 |