Birney (Tongue Riv Rd) MT, US: 45.366151, -106.48982
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 18, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 20.0 μg/m3 (18) | 9.3 μg/m3 (39) | 39.0 | |
| Jan. 18, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 16.0 μg/m3 (15) | 9.1 μg/m3 (38) | 38.0 | |
| Jan. 18, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 9.0 μg/m3 (8) | 9.3 μg/m3 (39) | 39.0 | |
| Jan. 18, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 14.0 μg/m3 (13) | 7.0 μg/m3 (29) | 29.0 | |
| Jan. 18, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 28.0 μg/m3 (25) | 5.0 μg/m3 (21) | 25.0 | |
| Jan. 18, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 22.0 μg/m3 (20) | 8.1 μg/m3 (34) | 34.0 | |
| Jan. 18, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 17.0 μg/m3 (15) | 6.8 μg/m3 (28) | 28.0 | |
| Jan. 18, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 32.0 μg/m3 (29) | 8.5 μg/m3 (35) | 35.0 | |
| Jan. 18, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 15.0 μg/m3 (14) | 11.1 μg/m3 (46) | 46.0 | |
| Jan. 18, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 19.0 μg/m3 (17) | 13.6 μg/m3 (53) | 53.0 | |
| Jan. 18, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 14.0 μg/m3 (13) | 9.1 μg/m3 (38) | 38.0 | |
| Jan. 18, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 9.0 μg/m3 (8) | 11.8 μg/m3 (49) | 49.0 | |
| Jan. 18, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 14.0 μg/m3 (13) | 9.4 μg/m3 (39) | 39.0 | |
| Jan. 18, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 12.0 μg/m3 (11) | 9.7 μg/m3 (40) | 40.0 | |
| Jan. 18, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 13.0 μg/m3 (12) | 14.1 μg/m3 (54) | 54.0 | |
| Jan. 18, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 27.0 μg/m3 (25) | 15.7 μg/m3 (58) | 58.0 | |
| Jan. 18, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 5.0 μg/m3 (5) | 6.6 μg/m3 (28) | 28.0 | |
| Jan. 18, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 13.0 μg/m3 (12) | 8.5 μg/m3 (35) | 35.0 | |
| Jan. 18, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 25.0 μg/m3 (23) | 4.2 μg/m3 (18) | 23.0 | |
| Jan. 18, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 16.0 μg/m3 (15) | 5.6 μg/m3 (23) | 23.0 | |
| Jan. 18, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 18.0 μg/m3 (16) | 4.9 μg/m3 (20) | 20.0 | |
| Jan. 18, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 22.0 μg/m3 (20) | 7.9 μg/m3 (33) | 33.0 | |
| Jan. 18, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 4.0 μg/m3 (4) | 6.8 μg/m3 (28) | 28.0 | |
| Jan. 17, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 8.0 μg/m3 (7) | 6.3 μg/m3 (26) | 26.0 | |
| Jan. 17, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 14.0 μg/m3 (13) | 4.3 μg/m3 (18) | 21.0 | |
| Jan. 17, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 0.0 μg/m3 (0) | 7.0 μg/m3 (29) | 29.0 | |
| Jan. 17, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 13.0 μg/m3 (12) | 5.4 μg/m3 (23) | 23.0 | |
| Jan. 17, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 24.0 μg/m3 (22) | 7.1 μg/m3 (30) | 30.0 | |
| Jan. 17, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 21.0 μg/m3 (19) | 5.7 μg/m3 (24) | 24.0 | |
| Jan. 17, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 13.0 μg/m3 (12) | 6.0 μg/m3 (25) | 25.0 | |
| Jan. 17, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 13.0 μg/m3 (12) | 4.4 μg/m3 (18) | 18.0 | |
| Jan. 17, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 22.0 μg/m3 (20) | 2.7 μg/m3 (11) | 20.0 | |
| Jan. 17, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 11.0 μg/m3 (10) | 3.8 μg/m3 (16) | 16.0 | |
| Jan. 17, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 14.0 μg/m3 (13) | 4.9 μg/m3 (20) | 20.0 | |
| Jan. 17, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 1.0 μg/m3 (1) | 1.2 μg/m3 (5) | 15.0 | |
| Jan. 17, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 4.0 μg/m3 (4) | 0.8 μg/m3 (3) | 15.0 | |
| Jan. 17, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 13.0 μg/m3 (12) | 2.8 μg/m3 (12) | 15.0 | |
| Jan. 17, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | N/A | 2.6 μg/m3 (11) | 14.0 | |
| Jan. 17, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 11.0 μg/m3 (10) | 3.3 μg/m3 (14) | 14.0 | |
| Jan. 17, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 9.0 μg/m3 (8) | 1.7 μg/m3 (7) | 14.0 | |
| Jan. 17, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 10.0 μg/m3 (9) | 1.3 μg/m3 (5) | 13.0 | |
| Jan. 17, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 0.0 μg/m3 (0) | 0.0 μg/m3 (0) | 14.0 | |
| Jan. 17, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 15.0 μg/m3 (14) | 6.4 μg/m3 (27) | 27.0 | |
| Jan. 17, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 20.0 μg/m3 (18) | 5.7 μg/m3 (24) | 24.0 | |
| Jan. 17, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 20.0 μg/m3 (18) | 4.6 μg/m3 (19) | 19.0 | |
| Jan. 17, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 25.0 μg/m3 (23) | 7.2 μg/m3 (30) | 30.0 | |
| Jan. 17, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 32.0 μg/m3 (29) | 3.7 μg/m3 (15) | 29.0 | |
| Jan. 16, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 47.0 μg/m3 (43) | 6.6 μg/m3 (28) | 43.0 | |
| Jan. 16, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 29.0 μg/m3 (26) | 4.1 μg/m3 (17) | 26.0 | |
| Jan. 16, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 7.0 μg/m3 (6) | 2.4 μg/m3 (10) | 22.0 | |
| Jan. 16, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 3.0 μg/m3 (3) | 4.2 μg/m3 (18) | 23.0 | |
| Jan. 16, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 10.0 μg/m3 (9) | N/A | 21.0 | |
| Jan. 16, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 15.0 μg/m3 (14) | 0.3 μg/m3 (1) | 18.0 | |
| Jan. 16, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 20.0 μg/m3 (18) | 6.9 μg/m3 (29) | 29.0 | |
| Jan. 16, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 15.0 μg/m3 (14) | 7.5 μg/m3 (31) | 31.0 | |
| Jan. 16, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 15.0 μg/m3 (14) | 2.7 μg/m3 (11) | 18.0 | |
| Jan. 16, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 16.0 μg/m3 (15) | 2.8 μg/m3 (12) | 16.0 | |
| Jan. 16, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 3.0 μg/m3 (3) | 1.9 μg/m3 (8) | 14.0 | |
| Jan. 16, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | -1.0 μg/m3 (0) | 3.0 μg/m3 (12) | 13.0 | |
| Jan. 16, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 8.0 μg/m3 (7) | 7.9 μg/m3 (33) | 33.0 | |
| Jan. 16, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 2.0 μg/m3 (2) | 4.6 μg/m3 (19) | 19.0 | |
| Jan. 16, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 5.0 μg/m3 (5) | 6.1 μg/m3 (25) | 25.0 | |
| Jan. 16, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 7.0 μg/m3 (6) | 2.0 μg/m3 (8) | 12.0 | |
| Jan. 16, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 10.0 μg/m3 (9) | -4.7 μg/m3 (0) | 12.0 | |
| Jan. 16, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 2.0 μg/m3 (2) | 5.0 μg/m3 (21) | 21.0 | |
| Jan. 16, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 6.0 μg/m3 (5) | 7.5 μg/m3 (31) | 31.0 | |
| Jan. 16, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 6.0 μg/m3 (5) | 6.8 μg/m3 (28) | 28.0 | |
| Jan. 16, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 7.0 μg/m3 (6) | 3.3 μg/m3 (14) | 14.0 | |
| Jan. 16, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 21.0 μg/m3 (19) | 5.0 μg/m3 (21) | 21.0 | |
| Jan. 16, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 55.0 μg/m3 (50) | 13.2 μg/m3 (53) | 53.0 | |
| Jan. 16, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 49.0 μg/m3 (45) | 10.3 μg/m3 (43) | 45.0 | |
| Jan. 15, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 37.0 μg/m3 (34) | 6.7 μg/m3 (28) | 34.0 | |
| Jan. 15, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 3.0 μg/m3 (3) | 8.7 μg/m3 (36) | 36.0 | |
| Jan. 15, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 11.0 μg/m3 (10) | 8.6 μg/m3 (36) | 36.0 | |
| Jan. 15, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 3.0 μg/m3 (3) | 7.6 μg/m3 (32) | 32.0 | |
| Jan. 15, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 4.0 μg/m3 (4) | 4.5 μg/m3 (19) | 19.0 | |
| Jan. 15, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 13.0 μg/m3 (12) | 2.6 μg/m3 (11) | 18.0 | |
| Jan. 15, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 5.0 μg/m3 (5) | 1.3 μg/m3 (5) | 19.0 | |
| Jan. 15, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | N/A | 4.8 μg/m3 (20) | 20.0 | |
| Jan. 15, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 6.9 μg/m3 (29) | 29.0 | |
| Jan. 15, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 10.0 μg/m3 (9) | 7.6 μg/m3 (32) | 32.0 | |
| Jan. 15, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 7.0 μg/m3 (6) | 4.9 μg/m3 (20) | 20.0 | |
| Jan. 15, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 0.0 μg/m3 (0) | 3.4 μg/m3 (14) | 21.0 | |
| Jan. 15, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | -3.0 μg/m3 (0) | 2.4 μg/m3 (10) | 21.0 | |
| Jan. 15, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 11.0 μg/m3 (10) | 7.4 μg/m3 (31) | 31.0 | |
| Jan. 15, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 5.0 μg/m3 (5) | 8.7 μg/m3 (36) | 36.0 | |
| Jan. 15, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 4.0 μg/m3 (4) | 5.1 μg/m3 (21) | 21.0 | |
| Jan. 15, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | N/A | 1.6 μg/m3 (7) | 18.0 | |
| Jan. 15, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 5.0 μg/m3 (5) | 4.5 μg/m3 (19) | 19.0 | |
| Jan. 15, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 8.0 μg/m3 (7) | 3.3 μg/m3 (14) | 20.0 | |
| Jan. 15, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | -2.0 μg/m3 (0) | 3.9 μg/m3 (16) | 20.0 | |
| Jan. 15, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 14.0 μg/m3 (13) | 2.6 μg/m3 (11) | 19.0 | |
| Jan. 15, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 4.0 μg/m3 (4) | 2.7 μg/m3 (11) | 18.0 | |
| Jan. 15, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 4.0 μg/m3 (4) | 3.7 μg/m3 (15) | 18.0 | |
| Jan. 15, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 20.0 μg/m3 (18) | 6.1 μg/m3 (25) | 25.0 | |
| Jan. 14, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 32.0 μg/m3 (29) | 10.6 μg/m3 (44) | 44.0 | |
| Jan. 14, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 7.0 μg/m3 (6) | 3.9 μg/m3 (16) | 19.0 | |
| Jan. 14, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 12.0 μg/m3 (11) | 5.0 μg/m3 (21) | 21.0 | |
| Jan. 14, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 7.0 μg/m3 (6) | 6.9 μg/m3 (29) | 29.0 | |
| Jan. 14, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 4.0 μg/m3 (4) | 2.8 μg/m3 (12) | 18.0 | |
| Jan. 14, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 0.0 μg/m3 (0) | 1.2 μg/m3 (5) | 18.0 | |
| Jan. 14, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 22.0 μg/m3 (20) | 6.1 μg/m3 (25) | 25.0 | |
| Jan. 14, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 4.0 μg/m3 (4) | 5.5 μg/m3 (23) | 23.0 | |
| Jan. 14, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | -5.0 μg/m3 (0) | 4.4 μg/m3 (18) | 18.0 | |
| Jan. 14, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 13.0 μg/m3 (12) | 3.4 μg/m3 (14) | 15.0 | |
| Jan. 14, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 3.0 μg/m3 (3) | 6.6 μg/m3 (28) | 28.0 | |
| Jan. 14, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 5.0 μg/m3 (5) | 3.7 μg/m3 (15) | 15.0 | |
| Jan. 14, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 10.0 μg/m3 (9) | 3.8 μg/m3 (16) | 16.0 | |
| Jan. 14, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 0.0 μg/m3 (0) | 4.2 μg/m3 (18) | 18.0 | |
| Jan. 14, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 13.0 μg/m3 (12) | 5.9 μg/m3 (25) | 25.0 | |
| Jan. 14, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 16.0 μg/m3 (15) | 3.4 μg/m3 (14) | 15.0 | |
| Jan. 14, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 3.0 μg/m3 (3) | -1.7 μg/m3 (0) | 14.0 | |
| Jan. 14, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | -2.0 μg/m3 (0) | 3.6 μg/m3 (15) | 15.0 | |
| Jan. 14, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 5.0 μg/m3 (5) | 1.3 μg/m3 (5) | 14.0 | |
| Jan. 14, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 5.0 μg/m3 (5) | 7.4 μg/m3 (31) | 31.0 | |
| Jan. 14, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 4.0 μg/m3 (4) | 2.6 μg/m3 (11) | 13.0 | |
| Jan. 14, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 2.0 μg/m3 (2) | 2.1 μg/m3 (9) | 13.0 | |
| Jan. 14, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 0.0 μg/m3 (0) | 9.0 μg/m3 (38) | 38.0 | |
| Jan. 14, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 21.0 μg/m3 (19) | 12.6 μg/m3 (51) | 51.0 | |
| Jan. 13, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | 19.0 μg/m3 (17) | 9.9 μg/m3 (41) | 41.0 | |
| Jan. 13, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 5.0 μg/m3 (5) | 11.7 μg/m3 (49) | 49.0 | |
| Jan. 13, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 17.0 μg/m3 (15) | 7.2 μg/m3 (30) | 30.0 | |
| Jan. 13, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 8.0 μg/m3 (7) | 9.4 μg/m3 (39) | 39.0 | |
| Jan. 13, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 15.0 μg/m3 (14) | 9.8 μg/m3 (41) | 41.0 | |
| Jan. 13, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 12.0 μg/m3 (11) | 4.7 μg/m3 (20) | 20.0 | |
| Jan. 13, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 18.0 μg/m3 (16) | 14.2 μg/m3 (55) | 55.0 | |
| Jan. 13, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | 25.0 μg/m3 (23) | 14.5 μg/m3 (55) | 55.0 | |
| Jan. 13, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | N/A | 14.0 μg/m3 (13) | 11.5 μg/m3 (48) | 48.0 | |
| Jan. 13, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | N/A | 12.0 μg/m3 (11) | 13.4 μg/m3 (53) | 53.0 | |
| Jan. 13, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | N/A | 16.0 μg/m3 (15) | 10.4 μg/m3 (43) | 43.0 | |
| Jan. 13, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 14.0 μg/m3 (13) | 9.1 μg/m3 (38) | 38.0 | |
| Jan. 13, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 14.0 μg/m3 (13) | 12.2 μg/m3 (50) | 50.0 | |
| Jan. 13, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 26.0 μg/m3 (24) | 10.3 μg/m3 (43) | 43.0 | |
| Jan. 13, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 1.0 μg/m3 (1) | 12.7 μg/m3 (51) | 51.0 | |
| Jan. 13, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 12.0 μg/m3 (11) | 8.2 μg/m3 (34) | 34.0 | |
| Jan. 13, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 5.0 μg/m3 (5) | -3.0 μg/m3 (0) | 14.0 | |
| Jan. 13, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 12.0 μg/m3 (11) | 7.8 μg/m3 (32) | 32.0 | |
| Jan. 13, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 6.0 μg/m3 (5) | 8.6 μg/m3 (36) | 36.0 | |
| Jan. 13, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 8.0 μg/m3 (7) | 6.2 μg/m3 (26) | 26.0 | |
| Jan. 13, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 8.0 μg/m3 (7) | 7.2 μg/m3 (30) | 30.0 | |
| Jan. 13, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 6.0 μg/m3 (5) | 0.0 μg/m3 (0) | 16.0 | |
| Jan. 13, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 7.0 μg/m3 (6) | -1.3 μg/m3 (0) | 17.0 | |
| Jan. 13, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 14.0 μg/m3 (13) | 2.6 μg/m3 (11) | 22.0 | |
| Jan. 12, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 15.0 μg/m3 (14) | 1.8 μg/m3 (8) | 23.0 | |
| Jan. 12, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 7.0 μg/m3 (6) | -0.5 μg/m3 (0) | 24.0 | |
| Jan. 12, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 0.0 μg/m3 (0) | 2.0 μg/m3 (8) | 24.0 | |
| Jan. 12, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 0.0 μg/m3 (0) | 0.6 μg/m3 (2) | 24.0 | |
| Jan. 12, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 0.0 μg/m3 (0) | -1.3 μg/m3 (0) | 25.0 | |
| Jan. 12, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 6.0 μg/m3 (5) | 3.2 μg/m3 (13) | 21.0 | |
| Jan. 12, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 10.0 μg/m3 (9) | 3.7 μg/m3 (15) | 18.0 | |
| Jan. 12, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 5.0 μg/m3 (5) | 4.7 μg/m3 (20) | 20.0 | |
| Jan. 12, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 9.0 μg/m3 (8) | 4.0 μg/m3 (17) | 17.0 | |
| Jan. 12, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 9.0 μg/m3 (8) | 4.4 μg/m3 (18) | 18.0 | |
| Jan. 12, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 5.0 μg/m3 (5) | 4.6 μg/m3 (19) | 19.0 | |
| Jan. 12, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 6.0 μg/m3 (5) | 5.0 μg/m3 (21) | 21.0 | |
| Jan. 12, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 4.0 μg/m3 (4) | 8.2 μg/m3 (34) | 34.0 | |
| Jan. 12, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 3.0 μg/m3 (3) | 2.7 μg/m3 (11) | 16.0 | |
| Jan. 12, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 4.0 μg/m3 (4) | 5.3 μg/m3 (22) | 22.0 | |
| Jan. 12, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 1.0 μg/m3 (1) | -0.3 μg/m3 (0) | 18.0 | |
| Jan. 12, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 3.0 μg/m3 (3) | 0.1 μg/m3 (0) | 19.0 | |
| Jan. 12, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 1.0 μg/m3 (1) | 3.2 μg/m3 (13) | 20.0 | |
| Jan. 12, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 4.0 μg/m3 (4) | 1.4 μg/m3 (6) | 20.0 | |
| Jan. 12, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | -3.0 μg/m3 (0) | 1.9 μg/m3 (8) | 18.0 | |
| Jan. 12, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 7.0 μg/m3 (6) | 4.0 μg/m3 (17) | 17.0 | |
| Jan. 12, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 0.0 μg/m3 (0) | 0.7 μg/m3 (3) | 17.0 | |
| Jan. 12, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 6.0 μg/m3 (5) | 0.5 μg/m3 (2) | 18.0 | |
| Jan. 12, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 5.0 μg/m3 (5) | 1.5 μg/m3 (6) | 21.0 | |
| Jan. 11, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 6.0 μg/m3 (5) | 3.1 μg/m3 (13) | 24.0 |