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| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 13, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| Dec. 13, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| Dec. 13, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (2) | N/A | N/A | 45.0 μg/m3 (124) | 124.0 | |
| Dec. 13, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| Dec. 13, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 33.0 μg/m3 (95) | 95.0 | |
| Dec. 13, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Dec. 13, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| Dec. 12, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| Dec. 12, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| Dec. 12, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| Dec. 12, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Dec. 12, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 12, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 12, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 12, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| Dec. 12, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| Dec. 12, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| Dec. 12, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| Dec. 12, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 12, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 12, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 12, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 12, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 12, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| Dec. 12, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| Dec. 12, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (5) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| Dec. 12, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (3) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| Dec. 12, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 12, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 12, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Dec. 12, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Dec. 11, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Dec. 11, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 11, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Dec. 11, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 11, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 11, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 11, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Dec. 11, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Dec. 11, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 11, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Dec. 11, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 11, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 11, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 11, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Dec. 11, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| Dec. 11, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| Dec. 11, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| Dec. 11, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| Dec. 11, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| Dec. 11, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Dec. 11, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 11, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 11, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Dec. 11, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Dec. 10, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 10, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 10, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 10, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 10, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 10, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 10, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 10, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 10, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 10, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 10, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 10, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 10, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 10, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 10, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 10, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| Dec. 10, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 10, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| Dec. 10, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 10, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 10, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 10, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 10, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 10, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 9, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 9, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 9, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 9, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| Dec. 9, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| Dec. 9, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Dec. 9, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Dec. 9, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| Dec. 9, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| Dec. 9, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 9, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 9, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Dec. 9, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Dec. 9, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Dec. 9, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| Dec. 9, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 9, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 9, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| Dec. 9, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (5) | N/A | N/A | N/A | 5.0 | |
| Dec. 9, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| Dec. 9, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| Dec. 9, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 9, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Dec. 9, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 8, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| Dec. 8, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 8, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| Dec. 8, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 8, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| Dec. 8, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 8, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 8, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 8, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| Dec. 8, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| Dec. 8, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| Dec. 8, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 15.0 μg/m3 (56) | 56.0 | |
| Dec. 8, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 8, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| Dec. 8, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| Dec. 8, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| Dec. 8, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 8, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| Dec. 8, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (6) | N/A | N/A | 61.0 μg/m3 (153) | 153.0 | |
| Dec. 8, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 57.0 μg/m3 (151) | 151.0 | |
| Dec. 8, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 58.0 μg/m3 (151) | 151.0 | |
| Dec. 8, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 54.0 μg/m3 (146) | 146.0 | |
| Dec. 8, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 51.0 μg/m3 (139) | 139.0 | |
| Dec. 8, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 47.0 μg/m3 (129) | 129.0 | |
| Dec. 7, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (2) | N/A | N/A | 51.0 μg/m3 (139) | 139.0 | |
| Dec. 7, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 49.0 μg/m3 (134) | 134.0 | |
| Dec. 7, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 53.0 μg/m3 (144) | 144.0 | |
| Dec. 7, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 50.0 μg/m3 (136) | 136.0 | |
| Dec. 7, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | N/A | 46.0 μg/m3 (126) | 126.0 | |
| Dec. 7, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | N/A | 46.0 μg/m3 (126) | 126.0 | |
| Dec. 7, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | N/A | 36.0 μg/m3 (101) | 101.0 | |
| Dec. 7, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| Dec. 7, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| Dec. 7, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | N/A | 42.0 μg/m3 (116) | 116.0 | |
| Dec. 7, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| Dec. 7, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 39.0 μg/m3 (109) | 109.0 | |
| Dec. 7, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 41.0 μg/m3 (114) | 114.0 | |
| Dec. 7, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| Dec. 7, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| Dec. 7, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 33.0 μg/m3 (95) | 95.0 | |
| Dec. 7, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | N/A | 46.0 μg/m3 (126) | 126.0 | |
| Dec. 7, 2018, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | N/A | N/A | 51.0 μg/m3 (139) | 139.0 | |
| Dec. 7, 2018, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (3) | N/A | N/A | 65.0 μg/m3 (155) | 155.0 | |
| Dec. 7, 2018, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 73.0 μg/m3 (159) | 159.0 | |
| Dec. 7, 2018, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 62.0 μg/m3 (153) | 153.0 | |
| Dec. 7, 2018, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 59.0 μg/m3 (152) | 152.0 | |
| Dec. 7, 2018, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 68.0 μg/m3 (157) | 157.0 | |
| Dec. 7, 2018, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 73.0 μg/m3 (159) | 159.0 | |
| Dec. 6, 2018, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 69.0 μg/m3 (157) | 157.0 | |
| Dec. 6, 2018, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 61.0 μg/m3 (153) | 153.0 | |
| Dec. 6, 2018, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 55.0 μg/m3 (149) | 149.0 | |
| Dec. 6, 2018, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 51.0 μg/m3 (139) | 139.0 | |
| Dec. 6, 2018, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 55.0 μg/m3 (149) | 149.0 | |
| Dec. 6, 2018, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 55.0 μg/m3 (149) | 149.0 | |
| Dec. 6, 2018, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | N/A | 39.0 μg/m3 (109) | 109.0 | |
| Dec. 6, 2018, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (26) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| Dec. 6, 2018, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (25) | N/A | N/A | 41.0 μg/m3 (114) | 114.0 | |
| Dec. 6, 2018, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| Dec. 6, 2018, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 44.0 μg/m3 (121) | 121.0 | |
| Dec. 6, 2018, noon | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 37.0 μg/m3 (104) | 104.0 | |
| Dec. 6, 2018, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| Dec. 6, 2018, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 38.0 μg/m3 (106) | 106.0 | |
| Dec. 6, 2018, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 37.0 μg/m3 (104) | 104.0 | |
| Dec. 6, 2018, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 37.0 μg/m3 (104) | 104.0 | |
| Dec. 6, 2018, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 34.0 μg/m3 (97) | 97.0 |