Ponca City OK, US: 36.697189, -97.081278
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 23, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 48.0 μg/m3 (44) | 29.9 μg/m3 (88) | 88.0 | |
| March 23, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 55.0 μg/m3 (50) | 37.6 μg/m3 (105) | 105.0 | |
| March 23, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 59.0 μg/m3 (52) | 41.1 μg/m3 (114) | 114.0 | |
| March 22, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 59.0 μg/m3 (52) | 45.4 μg/m3 (125) | 125.0 | |
| March 22, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 46.0 μg/m3 (42) | 33.8 μg/m3 (96) | 96.0 | |
| March 22, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 72.0 μg/m3 (58) | 32.6 μg/m3 (94) | 94.0 | |
| March 22, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 33.0 μg/m3 (30) | 20.0 μg/m3 (67) | 67.0 | |
| March 22, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 31.0 μg/m3 (28) | 11.9 μg/m3 (50) | 50.0 | |
| March 22, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | 25.0 μg/m3 (23) | 10.5 μg/m3 (44) | 44.0 | |
| March 22, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (9) | N/A | N/A | 65.0 μg/m3 (55) | 16.7 μg/m3 (60) | 60.0 | |
| March 22, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | 41.0 μg/m3 (37) | 20.4 μg/m3 (68) | 68.0 | |
| March 22, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | 70.0 μg/m3 (58) | 40.3 μg/m3 (112) | 112.0 | |
| March 22, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 102.0 μg/m3 (74) | 70.4 μg/m3 (158) | 158.0 | |
| March 22, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 115.0 μg/m3 (80) | 80.1 μg/m3 (163) | 163.0 | |
| March 22, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 82.0 μg/m3 (64) | 69.7 μg/m3 (157) | 157.0 | |
| March 22, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 53.0 μg/m3 (48) | 40.2 μg/m3 (112) | 112.0 | |
| March 22, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 37.0 μg/m3 (34) | 24.3 μg/m3 (76) | 76.0 | |
| March 22, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 25.0 μg/m3 (23) | 11.2 μg/m3 (47) | 47.0 | |
| March 22, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 26.0 μg/m3 (24) | 10.4 μg/m3 (43) | 43.0 | |
| March 22, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 38.0 μg/m3 (35) | 15.0 μg/m3 (56) | 56.0 | |
| March 22, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 43.0 μg/m3 (39) | 18.5 μg/m3 (64) | 64.0 | |
| March 22, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 45.0 μg/m3 (41) | 16.2 μg/m3 (59) | 59.0 | |
| March 22, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 43.0 μg/m3 (39) | 14.9 μg/m3 (56) | 56.0 | |
| March 22, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 37.0 μg/m3 (34) | 10.4 μg/m3 (43) | 43.0 | |
| March 22, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 μg/m3 (35) | 9.8 μg/m3 (41) | 41.0 | |
| March 22, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 32.0 μg/m3 (29) | 7.6 μg/m3 (32) | 32.0 | |
| March 22, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 5.3 μg/m3 (22) | 22.0 | |
| March 21, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 5.8 μg/m3 (24) | 24.0 | |
| March 21, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 28.0 μg/m3 (25) | 6.4 μg/m3 (27) | 27.0 | |
| March 21, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 5.6 μg/m3 (23) | 23.0 | |
| March 21, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 4.6 μg/m3 (19) | 19.0 | |
| March 21, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 29.0 μg/m3 (26) | 5.3 μg/m3 (22) | 26.0 | |
| March 21, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 5.7 μg/m3 (24) | 24.0 | |
| March 21, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 6.5 μg/m3 (27) | 27.0 | |
| March 21, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 8.0 μg/m3 (33) | 33.0 | |
| March 21, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 8.1 μg/m3 (34) | 34.0 | |
| March 21, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 7.8 μg/m3 (32) | 32.0 | |
| March 21, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 7.2 μg/m3 (30) | 30.0 | |
| March 21, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 11.0 μg/m3 (10) | 6.6 μg/m3 (28) | 28.0 | |
| March 21, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 12.0 μg/m3 (11) | 6.5 μg/m3 (27) | 27.0 | |
| March 21, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 5.8 μg/m3 (24) | 24.0 | |
| March 21, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 6.2 μg/m3 (26) | 26.0 | |
| March 21, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 5.7 μg/m3 (24) | 24.0 | |
| March 21, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 5.4 μg/m3 (23) | 23.0 | |
| March 21, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 4.6 μg/m3 (19) | 19.0 | |
| March 21, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 4.3 μg/m3 (18) | 18.0 | |
| March 21, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 3.8 μg/m3 (16) | 16.0 | |
| March 21, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 4.2 μg/m3 (18) | 18.0 | |
| March 21, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 4.7 μg/m3 (20) | 20.0 | |
| March 21, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 12.0 μg/m3 (11) | 4.4 μg/m3 (18) | 18.0 | |
| March 20, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 8.0 μg/m3 (7) | 3.4 μg/m3 (14) | 14.0 | |
| March 20, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 8.0 μg/m3 (7) | 3.7 μg/m3 (15) | 15.0 | |
| March 20, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 10.0 μg/m3 (9) | 4.5 μg/m3 (19) | 19.0 | |
| March 20, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 9.0 μg/m3 (8) | 5.0 μg/m3 (21) | 21.0 | |
| March 20, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 10.0 μg/m3 (9) | 5.3 μg/m3 (22) | 22.0 | |
| March 20, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 11.0 μg/m3 (10) | 6.3 μg/m3 (26) | 26.0 | |
| March 20, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 10.0 μg/m3 (9) | 6.4 μg/m3 (27) | 27.0 | |
| March 20, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 11.0 μg/m3 (10) | 7.0 μg/m3 (29) | 29.0 | |
| March 20, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 12.0 μg/m3 (11) | 8.2 μg/m3 (34) | 34.0 | |
| March 20, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 9.2 μg/m3 (38) | 38.0 | |
| March 20, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 11.4 μg/m3 (48) | 48.0 | |
| March 20, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 12.0 μg/m3 (50) | 50.0 | |
| March 20, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 11.7 μg/m3 (49) | 49.0 | |
| March 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 12.3 μg/m3 (51) | 51.0 | |
| March 20, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 13.0 μg/m3 (52) | 52.0 | |
| March 20, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 13.5 μg/m3 (53) | 53.0 | |
| March 20, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 14.3 μg/m3 (55) | 55.0 | |
| March 20, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 15.1 μg/m3 (57) | 57.0 | |
| March 20, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 14.4 μg/m3 (55) | 55.0 | |
| March 20, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 12.3 μg/m3 (51) | 51.0 | |
| March 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 11.0 μg/m3 (10) | 6.8 μg/m3 (28) | 28.0 | |
| March 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 5.8 μg/m3 (24) | 24.0 | |
| March 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 6.1 μg/m3 (25) | 25.0 | |
| March 19, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 26.0 μg/m3 (24) | 7.1 μg/m3 (30) | 30.0 | |
| March 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 29.0 μg/m3 (26) | 8.7 μg/m3 (36) | 36.0 | |
| March 19, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 35.0 μg/m3 (32) | 9.7 μg/m3 (40) | 40.0 | |
| March 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 μg/m3 (37) | 10.6 μg/m3 (44) | 44.0 | |
| March 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 51.0 μg/m3 (46) | 11.0 μg/m3 (46) | 46.0 | |
| March 19, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 53.0 μg/m3 (48) | 10.8 μg/m3 (45) | 48.0 | |
| March 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 78.0 μg/m3 (62) | 12.7 μg/m3 (51) | 62.0 | |
| March 19, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 47.0 μg/m3 (43) | 12.4 μg/m3 (51) | 51.0 | |
| March 19, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 μg/m3 (33) | 15.2 μg/m3 (57) | 57.0 | |
| March 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (7) | N/A | N/A | 34.0 μg/m3 (31) | 20.8 μg/m3 (69) | 69.0 | |
| March 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 42.0 μg/m3 (38) | 31.4 μg/m3 (91) | 91.0 | |
| March 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 42.0 μg/m3 (38) | 32.0 μg/m3 (93) | 93.0 | |
| March 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 μg/m3 (35) | 29.5 μg/m3 (87) | 87.0 | |
| March 19, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 μg/m3 (35) | 28.4 μg/m3 (85) | 85.0 | |
| March 19, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 39.0 μg/m3 (35) | 28.4 μg/m3 (85) | 85.0 | |
| March 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 40.0 μg/m3 (36) | 29.8 μg/m3 (88) | 88.0 | |
| March 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 27.0 μg/m3 (25) | 18.4 μg/m3 (64) | 64.0 | |
| March 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 22.0 μg/m3 (20) | 12.9 μg/m3 (52) | 52.0 | |
| March 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 22.0 μg/m3 (20) | 13.5 μg/m3 (53) | 53.0 | |
| March 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 27.0 μg/m3 (25) | 14.2 μg/m3 (55) | 55.0 | |
| March 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 27.0 μg/m3 (25) | 14.4 μg/m3 (55) | 55.0 | |
| March 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 34.0 μg/m3 (31) | 18.2 μg/m3 (63) | 63.0 | |
| March 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 34.0 μg/m3 (31) | 18.1 μg/m3 (63) | 63.0 | |
| March 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 28.0 μg/m3 (25) | 15.2 μg/m3 (57) | 57.0 | |
| March 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 24.0 μg/m3 (22) | 14.5 μg/m3 (55) | 55.0 | |
| March 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 9.8 μg/m3 (41) | 41.0 | |
| March 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 7.3 μg/m3 (30) | 30.0 | |
| March 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 6.6 μg/m3 (28) | 28.0 | |
| March 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 6.6 μg/m3 (28) | 28.0 | |
| March 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 10.7 μg/m3 (45) | 45.0 | |
| March 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 25.0 μg/m3 (23) | 13.1 μg/m3 (52) | 52.0 | |
| March 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 22.0 μg/m3 (20) | 8.9 μg/m3 (37) | 37.0 | |
| March 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 7.3 μg/m3 (30) | 30.0 | |
| March 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 6.3 μg/m3 (26) | 26.0 | |
| March 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 6.5 μg/m3 (27) | 27.0 | |
| March 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 7.1 μg/m3 (30) | 30.0 | |
| March 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 8.0 μg/m3 (33) | 33.0 | |
| March 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 8.1 μg/m3 (34) | 34.0 | |
| March 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 11.1 μg/m3 (46) | 46.0 | |
| March 18, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 20.0 μg/m3 (18) | 9.9 μg/m3 (41) | 41.0 | |
| March 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 9.6 μg/m3 (40) | 40.0 | |
| March 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 8.8 μg/m3 (37) | 37.0 | |
| March 18, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 7.6 μg/m3 (32) | 32.0 | |
| March 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 10.3 μg/m3 (43) | 43.0 | |
| March 18, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 11.1 μg/m3 (46) | 46.0 | |
| March 18, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 25.0 μg/m3 (23) | 7.7 μg/m3 (32) | 32.0 | |
| March 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 28.0 μg/m3 (25) | 8.8 μg/m3 (37) | 37.0 | |
| March 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 6.4 μg/m3 (27) | 27.0 | |
| March 17, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 5.7 μg/m3 (24) | 24.0 | |
| March 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 7.9 μg/m3 (33) | 33.0 | |
| March 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 5.1 μg/m3 (21) | 21.0 | |
| March 17, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 5.2 μg/m3 (22) | 22.0 | |
| March 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 5.9 μg/m3 (25) | 25.0 | |
| March 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 15.0 μg/m3 (14) | 7.6 μg/m3 (32) | 32.0 | |
| March 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (6) | N/A | N/A | 14.0 μg/m3 (13) | 6.4 μg/m3 (27) | 27.0 | |
| March 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (4) | N/A | N/A | 13.0 μg/m3 (12) | 5.3 μg/m3 (22) | 22.0 | |
| March 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 6.6 μg/m3 (28) | 28.0 | |
| March 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 12.0 μg/m3 (11) | 6.6 μg/m3 (28) | 28.0 | |
| March 17, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 9.6 μg/m3 (40) | 40.0 | |
| March 17, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 11.0 μg/m3 (46) | 46.0 | |
| March 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 10.8 μg/m3 (45) | 45.0 | |
| March 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 10.1 μg/m3 (42) | 42.0 | |
| March 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 20.0 μg/m3 (18) | 10.1 μg/m3 (42) | 42.0 | |
| March 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 9.8 μg/m3 (41) | 41.0 | |
| March 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 22.0 μg/m3 (20) | 10.7 μg/m3 (45) | 45.0 | |
| March 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 21.0 μg/m3 (19) | 10.2 μg/m3 (42) | 42.0 | |
| March 17, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 20.0 μg/m3 (18) | 8.7 μg/m3 (36) | 36.0 | |
| March 17, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 20.0 μg/m3 (18) | 9.1 μg/m3 (38) | 38.0 | |
| March 17, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 7.6 μg/m3 (32) | 32.0 | |
| March 17, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 7.0 μg/m3 (29) | 29.0 | |
| March 17, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 7.3 μg/m3 (30) | 30.0 | |
| March 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 7.4 μg/m3 (31) | 31.0 | |
| March 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 16, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 18.0 μg/m3 (16) | 8.1 μg/m3 (34) | 34.0 | |
| March 16, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 7.5 μg/m3 (31) | 31.0 | |
| March 16, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 13.0 μg/m3 (12) | 5.6 μg/m3 (23) | 23.0 | |
| March 16, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 10.0 μg/m3 (9) | 4.3 μg/m3 (18) | 18.0 | |
| March 16, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 9.0 μg/m3 (8) | 3.5 μg/m3 (15) | 15.0 | |
| March 16, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 10.0 μg/m3 (9) | 3.6 μg/m3 (15) | 15.0 | |
| March 16, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 8.0 μg/m3 (7) | 3.0 μg/m3 (12) | 12.0 | |
| March 16, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 10.0 μg/m3 (9) | 4.0 μg/m3 (17) | 17.0 | |
| March 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 27.0 μg/m3 (25) | 6.0 μg/m3 (25) | 25.0 | |
| March 16, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 17.0 μg/m3 (15) | 6.9 μg/m3 (29) | 29.0 | |
| March 16, 2019, noon | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 12.0 μg/m3 (11) | 5.5 μg/m3 (23) | 23.0 | |
| March 16, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 10.7 μg/m3 (45) | 45.0 | |
| March 16, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 20.0 μg/m3 (18) | 11.9 μg/m3 (50) | 50.0 | |
| March 16, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 10.9 μg/m3 (45) | 45.0 | |
| March 16, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 6.2 μg/m3 (26) | 26.0 | |
| March 16, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 7.8 μg/m3 (32) | 32.0 | |
| March 16, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 7.7 μg/m3 (32) | 32.0 | |
| March 16, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 14.0 μg/m3 (13) | 7.1 μg/m3 (30) | 30.0 | |
| March 16, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 15.0 μg/m3 (14) | 6.8 μg/m3 (28) | 28.0 | |
| March 16, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 16.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 |