Broadus (Big Powder Riv E Rd) MT, US: 45.440295, -105.37028
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 17, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 39.0 μg/m3 (35) | 7.3 μg/m3 (30) | 35.0 | |
| Jan. 17, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 32.0 μg/m3 (29) | 3.3 μg/m3 (14) | 29.0 | |
| Jan. 17, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 23.0 μg/m3 (21) | -0.1 μg/m3 (0) | 21.0 | |
| Jan. 17, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 32.0 μg/m3 (29) | 4.7 μg/m3 (20) | 29.0 | |
| Jan. 17, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 20.0 μg/m3 (18) | 5.6 μg/m3 (23) | 25.0 | |
| Jan. 17, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 13.0 μg/m3 (12) | 2.8 μg/m3 (12) | 18.0 | |
| Jan. 17, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 24.0 μg/m3 (22) | 5.7 μg/m3 (24) | 24.0 | |
| Jan. 17, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | 8.0 μg/m3 (7) | 4.2 μg/m3 (18) | 18.0 | |
| Jan. 17, 2020, 7 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) | -1.4 μg/m3 (0) | 13.0 | |
| Jan. 17, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 12.0 μg/m3 (11) | 2.2 μg/m3 (9) | 18.0 | |
| Jan. 17, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 14.0 μg/m3 (13) | 4.2 μg/m3 (18) | 22.0 | |
| Jan. 17, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 14.0 μg/m3 (13) | 4.4 μg/m3 (18) | 18.0 | |
| Jan. 17, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 19.0 μg/m3 (17) | 3.3 μg/m3 (14) | 20.0 | |
| Jan. 17, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 35.0 μg/m3 (32) | 6.5 μg/m3 (27) | 32.0 | |
| Jan. 17, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 61.0 μg/m3 (53) | 2.3 μg/m3 (10) | 53.0 | |
| Jan. 17, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 73.0 μg/m3 (59) | 0.1 μg/m3 (0) | 59.0 | |
| Jan. 16, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 4.0 μg/m3 (4) | 1.6 μg/m3 (7) | 22.0 | |
| Jan. 16, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 4.0 μg/m3 (4) | 1.1 μg/m3 (5) | 23.0 | |
| Jan. 16, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 6.0 μg/m3 (5) | 1.1 μg/m3 (5) | 23.0 | |
| Jan. 16, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 8.0 μg/m3 (7) | 0.1 μg/m3 (0) | 23.0 | |
| Jan. 16, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 2.0 μg/m3 (2) | 1.0 μg/m3 (4) | 23.0 | |
| Jan. 16, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 4.0 μg/m3 (4) | 1.7 μg/m3 (7) | 23.0 | |
| Jan. 16, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 18.0 μg/m3 (16) | 0.1 μg/m3 (0) | 22.0 | |
| Jan. 16, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 30.0 μg/m3 (27) | 3.0 μg/m3 (12) | 27.0 | |
| Jan. 16, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 24.0 μg/m3 (22) | 1.8 μg/m3 (8) | 22.0 | |
| Jan. 16, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 18.0 μg/m3 (16) | 1.7 μg/m3 (7) | 21.0 | |
| Jan. 16, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 14.0 μg/m3 (13) | 5.2 μg/m3 (22) | 22.0 | |
| Jan. 16, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 7.0 μg/m3 (6) | 3.4 μg/m3 (14) | 20.0 | |
| Jan. 16, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 9.0 μg/m3 (8) | 1.2 μg/m3 (5) | 18.0 | |
| Jan. 16, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 11.0 μg/m3 (10) | 2.8 μg/m3 (12) | 17.0 | |
| Jan. 16, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 12.0 μg/m3 (11) | 2.4 μg/m3 (10) | 17.0 | |
| Jan. 16, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 11.0 μg/m3 (10) | 0.0 μg/m3 (0) | 18.0 | |
| Jan. 16, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | -4.0 μg/m3 (0) | 0.5 μg/m3 (2) | 19.0 | |
| Jan. 16, 2020, 6 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) | 3.1 μg/m3 (13) | 21.0 | |
| Jan. 16, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 0.0 μg/m3 (0) | 3.4 μg/m3 (14) | 19.0 | |
| Jan. 16, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 2.0 μg/m3 (2) | 3.0 μg/m3 (12) | 18.0 | |
| Jan. 16, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 7.0 μg/m3 (6) | -0.7 μg/m3 (0) | 18.0 | |
| Jan. 16, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 15.0 μg/m3 (14) | 3.6 μg/m3 (15) | 17.0 | |
| Jan. 16, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 13.0 μg/m3 (12) | 5.2 μg/m3 (22) | 22.0 | |
| Jan. 16, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 9.0 μg/m3 (8) | -1.5 μg/m3 (0) | 17.0 | |
| Jan. 15, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | -3.0 μg/m3 (0) | -2.3 μg/m3 (0) | 17.0 | |
| Jan. 15, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 6.0 μg/m3 (5) | 2.8 μg/m3 (12) | 18.0 | |
| Jan. 15, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 3.0 μg/m3 (3) | 5.6 μg/m3 (23) | 23.0 | |
| Jan. 15, 2020, 8 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) | 3.3 μg/m3 (14) | 18.0 | |
| Jan. 15, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 11.0 μg/m3 (10) | 4.9 μg/m3 (20) | 20.0 | |
| Jan. 15, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 12.0 μg/m3 (11) | 1.5 μg/m3 (6) | 20.0 | |
| Jan. 15, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 12.0 μg/m3 (11) | 4.5 μg/m3 (19) | 21.0 | |
| Jan. 15, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 21.0 μg/m3 (19) | 6.1 μg/m3 (25) | 25.0 | |
| Jan. 15, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 28.0 μg/m3 (25) | 3.5 μg/m3 (15) | 25.0 | |
| Jan. 15, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 9.0 μg/m3 (8) | 1.1 μg/m3 (5) | 22.0 | |
| Jan. 15, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 7.0 μg/m3 (6) | 2.3 μg/m3 (10) | 23.0 | |
| Jan. 15, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 4.0 μg/m3 (4) | 0.0 μg/m3 (0) | 22.0 | |
| Jan. 15, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 0.0 μg/m3 (0) | 5.2 μg/m3 (22) | 22.0 | |
| Jan. 15, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 5.0 μg/m3 (5) | 4.7 μg/m3 (20) | 21.0 | |
| Jan. 15, 2020, 9 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) | 2.8 μg/m3 (12) | 20.0 | |
| Jan. 15, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 2.0 μg/m3 (2) | 1.5 μg/m3 (6) | 18.0 | |
| Jan. 15, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | -3.0 μg/m3 (0) | 3.8 μg/m3 (16) | 18.0 | |
| Jan. 15, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 9.0 μg/m3 (8) | 1.4 μg/m3 (6) | 18.0 | |
| Jan. 15, 2020, 5 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) | 4.5 μg/m3 (19) | 21.0 | |
| Jan. 15, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 17.0 μg/m3 (15) | 4.8 μg/m3 (20) | 21.0 | |
| Jan. 15, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 17.0 μg/m3 (15) | 3.4 μg/m3 (14) | 22.0 | |
| Jan. 15, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 21.0 μg/m3 (19) | 7.7 μg/m3 (32) | 32.0 | |
| Jan. 15, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 29.0 μg/m3 (26) | 4.9 μg/m3 (20) | 26.0 | |
| Jan. 15, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 20.0 μg/m3 (18) | 4.7 μg/m3 (20) | 22.0 | |
| Jan. 14, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 18.0 μg/m3 (16) | 4.2 μg/m3 (18) | 22.0 | |
| Jan. 14, 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) | -0.9 μg/m3 (0) | 21.0 | |
| Jan. 14, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 17.0 μg/m3 (15) | 2.4 μg/m3 (10) | 19.0 | |
| Jan. 14, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 35.0 μg/m3 (32) | 5.1 μg/m3 (21) | 32.0 | |
| Jan. 14, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 34.0 μg/m3 (31) | 0.6 μg/m3 (2) | 31.0 | |
| Jan. 14, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | 23.0 μg/m3 (21) | 3.6 μg/m3 (15) | 21.0 | |
| Jan. 14, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 21.0 μg/m3 (19) | -0.6 μg/m3 (0) | 19.0 | |
| Jan. 14, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 13.0 μg/m3 (12) | 5.4 μg/m3 (23) | 23.0 | |
| Jan. 14, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 6.0 μg/m3 (5) | 3.5 μg/m3 (15) | 18.0 | |
| Jan. 14, 2020, 2 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) | 2.2 μg/m3 (9) | 19.0 | |
| Jan. 14, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | 9.0 μg/m3 (8) | 3.5 μg/m3 (15) | 18.0 | |
| Jan. 14, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 8.0 μg/m3 (7) | 3.9 μg/m3 (16) | 17.0 | |
| Jan. 14, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 7.0 μg/m3 (6) | 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 | 8.0 μg/m3 (7) | 2.4 μg/m3 (10) | 15.0 | |
| Jan. 14, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 5.0 μg/m3 (5) | -0.2 μg/m3 (0) | 15.0 | |
| Jan. 14, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | -1.0 μg/m3 (0) | 6.1 μg/m3 (25) | 25.0 | |
| Jan. 14, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 0.0 μg/m3 (0) | 0.6 μg/m3 (2) | 14.0 | |
| Jan. 14, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 4.0 μg/m3 (4) | 1.8 μg/m3 (8) | 14.0 | |
| Jan. 14, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | -1.0 μg/m3 (0) | 2.5 μg/m3 (10) | 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 | 1.0 μg/m3 (1) | 2.9 μg/m3 (12) | 13.0 | |
| 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) | 4.9 μg/m3 (20) | 20.0 | |
| Jan. 14, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | 26.0 μg/m3 (24) | 4.0 μg/m3 (17) | 24.0 | |
| Jan. 14, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 35.0 μg/m3 (32) | 7.9 μg/m3 (33) | 33.0 | |
| Jan. 14, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 10.0 μg/m3 (9) | 3.8 μg/m3 (16) | 16.0 | |
| Jan. 13, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 10.0 μg/m3 (9) | 4.2 μg/m3 (18) | 18.0 | |
| Jan. 13, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 21.0 μg/m3 (19) | 8.7 μg/m3 (36) | 36.0 | |
| Jan. 13, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 27.0 μg/m3 (25) | 10.7 μg/m3 (45) | 45.0 | |
| Jan. 13, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 35.0 μg/m3 (32) | 7.6 μg/m3 (32) | 32.0 | |
| Jan. 13, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | 30.0 μg/m3 (27) | 4.4 μg/m3 (18) | 27.0 | |
| Jan. 13, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | 28.0 μg/m3 (25) | 2.6 μg/m3 (11) | 25.0 | |
| Jan. 13, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 35.0 μg/m3 (32) | 2.9 μg/m3 (12) | 32.0 | |
| Jan. 13, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 24.0 μg/m3 (22) | 2.5 μg/m3 (10) | 22.0 | |
| Jan. 13, 2020, 3 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) | 1.2 μg/m3 (5) | 19.0 | |
| Jan. 13, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 3.0 μg/m3 (3) | -0.9 μg/m3 (0) | 19.0 | |
| Jan. 13, 2020, 1 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) | 2.2 μg/m3 (9) | 18.0 | |
| Jan. 13, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 5.0 μg/m3 (5) | 3.4 μg/m3 (14) | 16.0 | |
| Jan. 13, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 9.0 μg/m3 (8) | 2.9 μg/m3 (12) | 16.0 | |
| Jan. 13, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 12.0 μg/m3 (11) | 4.6 μg/m3 (19) | 19.0 | |
| Jan. 13, 2020, 9 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) | 4.2 μg/m3 (18) | 18.0 | |
| Jan. 13, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 10.0 μg/m3 (9) | 5.6 μg/m3 (23) | 23.0 | |
| Jan. 13, 2020, 7 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. 13, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (14) | N/A | 7.0 μg/m3 (6) | 3.3 μg/m3 (14) | 14.0 | |
| Jan. 13, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | 5.0 μg/m3 (5) | 3.2 μg/m3 (13) | 15.0 | |
| 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) | 4.9 μg/m3 (20) | 20.0 | |
| Jan. 13, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 9.0 μg/m3 (8) | 2.3 μg/m3 (10) | 16.0 | |
| Jan. 13, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | 10.0 μg/m3 (9) | 1.3 μg/m3 (5) | 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 | 26.0 μg/m3 (24) | 8.3 μg/m3 (35) | 35.0 | |
| Jan. 13, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 51.0 μg/m3 (46) | 16.6 μg/m3 (60) | 60.0 | |
| Jan. 12, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 24.0 μg/m3 (22) | 0.3 μg/m3 (1) | 23.0 | |
| Jan. 12, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 8.0 μg/m3 (7) | -0.5 μg/m3 (0) | 25.0 | |
| Jan. 12, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 2.0 μg/m3 (2) | 2.7 μg/m3 (11) | 26.0 | |
| Jan. 12, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 3.0 μg/m3 (3) | -0.4 μg/m3 (0) | 25.0 | |
| Jan. 12, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 3.0 μg/m3 (3) | 0.0 μg/m3 (0) | 25.0 | |
| Jan. 12, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 3.0 μg/m3 (3) | 1.7 μg/m3 (7) | 25.0 | |
| Jan. 12, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 11.0 μg/m3 (10) | -0.8 μg/m3 (0) | 24.0 | |
| Jan. 12, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 3.0 μg/m3 (3) | 1.3 μg/m3 (5) | 24.0 | |
| Jan. 12, 2020, 3 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) | 1.7 μg/m3 (7) | 24.0 | |
| Jan. 12, 2020, 2 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) | -0.8 μg/m3 (0) | 23.0 | |
| Jan. 12, 2020, 1 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) | 3.8 μg/m3 (16) | 23.0 | |
| Jan. 12, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 2.0 μg/m3 (2) | -1.2 μg/m3 (0) | 23.0 | |
| Jan. 12, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 3.0 μg/m3 (3) | 2.1 μg/m3 (9) | 23.0 | |
| Jan. 12, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 1.0 μg/m3 (1) | 2.8 μg/m3 (12) | 23.0 | |
| Jan. 12, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 6.0 μg/m3 (5) | 0.0 μg/m3 (0) | 24.0 | |
| Jan. 12, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 4.0 μg/m3 (4) | 0.4 μg/m3 (2) | 24.0 | |
| Jan. 12, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 0.0 μg/m3 (0) | 3.9 μg/m3 (16) | 19.0 | |
| Jan. 12, 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) | 4.3 μg/m3 (18) | 19.0 | |
| Jan. 12, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | 2.0 μg/m3 (2) | 0.9 μg/m3 (4) | 21.0 | |
| Jan. 12, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 2.0 μg/m3 (2) | 1.8 μg/m3 (8) | 22.0 | |
| Jan. 12, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 2.0 μg/m3 (2) | 0.2 μg/m3 (1) | 24.0 | |
| Jan. 12, 2020, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 5.0 μg/m3 (5) | 0.2 μg/m3 (1) | 25.0 | |
| Jan. 12, 2020, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 5.0 μg/m3 (5) | -0.2 μg/m3 (0) | 25.0 | |
| Jan. 12, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | 2.0 μg/m3 (2) | 0.1 μg/m3 (0) | 28.0 | |
| Jan. 11, 2020, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 5.0 μg/m3 (5) | 1.6 μg/m3 (7) | 27.0 | |
| Jan. 11, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 5.0 μg/m3 (5) | 0.1 μg/m3 (0) | 27.0 | |
| Jan. 11, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 7.0 μg/m3 (6) | 0.3 μg/m3 (1) | 26.0 | |
| Jan. 11, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | 4.0 μg/m3 (4) | -0.3 μg/m3 (0) | 26.0 | |
| Jan. 11, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 11.0 μg/m3 (10) | -2.8 μg/m3 (0) | 27.0 | |
| Jan. 11, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 5.0 μg/m3 (5) | 1.5 μg/m3 (6) | 25.0 | |
| Jan. 11, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 18.0 μg/m3 (16) | 2.6 μg/m3 (11) | 25.0 | |
| Jan. 11, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 17.0 μg/m3 (15) | 0.3 μg/m3 (1) | 25.0 | |
| Jan. 11, 2020, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 17.0 μg/m3 (15) | -0.7 μg/m3 (0) | 25.0 | |
| Jan. 11, 2020, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 13.0 μg/m3 (12) | 2.2 μg/m3 (9) | 24.0 | |
| Jan. 11, 2020, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 0.0 μg/m3 (0) | 2.7 μg/m3 (11) | 25.0 | |
| Jan. 11, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | 1.0 μg/m3 (1) | -1.5 μg/m3 (0) | 24.0 | |
| Jan. 11, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 5.0 μg/m3 (5) | 1.7 μg/m3 (7) | 25.0 | |
| Jan. 11, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 2.0 μg/m3 (2) | 0.9 μg/m3 (4) | 25.0 | |
| Jan. 11, 2020, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | 7.0 μg/m3 (6) | 1.1 μg/m3 (5) | 25.0 | |
| Jan. 11, 2020, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 7.0 μg/m3 (6) | 2.5 μg/m3 (10) | 23.0 | |
| Jan. 11, 2020, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 4.0 μg/m3 (4) | 0.7 μg/m3 (3) | 23.0 | |
| Jan. 11, 2020, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 1.0 μg/m3 (1) | -1.4 μg/m3 (0) | 23.0 | |
| Jan. 11, 2020, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 3.0 μg/m3 (3) | 1.1 μg/m3 (5) | 23.0 | |
| Jan. 11, 2020, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | 4.0 μg/m3 (4) | 1.3 μg/m3 (5) | 23.0 | |
| Jan. 11, 2020, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | 4.0 μg/m3 (4) | 2.6 μg/m3 (11) | 22.0 | |
| Jan. 11, 2020, 2 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) | 3.5 μg/m3 (15) | 20.0 | |
| Jan. 11, 2020, 1 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) | 5.4 μg/m3 (23) | 23.0 | |
| Jan. 11, 2020, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | -3.0 μg/m3 (0) | 7.8 μg/m3 (32) | 32.0 | |
| Jan. 10, 2020, 11 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) | 1.1 μg/m3 (5) | 25.0 | |
| Jan. 10, 2020, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | 0.0 μg/m3 (0) | -1.6 μg/m3 (0) | 27.0 | |
| Jan. 10, 2020, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | -1.0 μg/m3 (0) | 0.0 μg/m3 (0) | 29.0 | |
| Jan. 10, 2020, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | 11.0 μg/m3 (10) | -0.9 μg/m3 (0) | 29.0 | |
| Jan. 10, 2020, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | 24.0 μg/m3 (22) | 0.2 μg/m3 (1) | 25.0 | |
| Jan. 10, 2020, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | 16.0 μg/m3 (15) | -0.2 μg/m3 (0) | 22.0 | |
| Jan. 10, 2020, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | 8.0 μg/m3 (7) | 6.6 μg/m3 (28) | 28.0 | |
| Jan. 10, 2020, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 |