None None, None: None, None
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 20, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 20, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 24.0 μg/m3 (76) | 76.0 | |
| March 20, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| March 20, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| March 20, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 20, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 20, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 20, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| March 20, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 20, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| March 20, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 17.0 μg/m3 (61) | 61.0 | |
| March 20, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 20, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (47) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 20, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 20, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 20, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 20, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (3) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 20, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| March 20, 2019, 5 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 | |
| March 20, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 20, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 20, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (45) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 20, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 20, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| March 19, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 19, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 19, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (42) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 19, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 19, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (43) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| March 19, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 19, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 19, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (42) | N/A | N/A | 34.0 μg/m3 (97) | 97.0 | |
| March 19, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 38.0 μg/m3 (106) | 106.0 | |
| March 19, 2019, 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 | |
| March 19, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 42.0 μg/m3 (116) | 116.0 | |
| March 19, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 56.0 μg/m3 (150) | 150.0 | |
| March 19, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| March 19, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (31) | N/A | N/A | 44.0 μg/m3 (121) | 121.0 | |
| March 19, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 36.0 μg/m3 (101) | 101.0 | |
| March 19, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (33) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 19, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 42.0 μg/m3 (116) | 116.0 | |
| March 19, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| March 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 19, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| March 18, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 18, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 18, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 18, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 42.0 μg/m3 (116) | 116.0 | |
| March 18, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 18, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| March 18, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 18, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (36) | N/A | N/A | N/A | 36.0 | |
| March 18, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | N/A | 38.0 | |
| March 18, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (38) | N/A | N/A | N/A | 38.0 | |
| March 18, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | N/A | 40.0 | |
| March 18, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (40) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 18, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 18, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 18, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 34.0 μg/m3 (97) | 97.0 | |
| March 18, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (30) | N/A | N/A | 39.0 μg/m3 (109) | 109.0 | |
| March 18, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| March 18, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (34) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| March 18, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (38) | N/A | N/A | 57.0 μg/m3 (151) | 151.0 | |
| March 18, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 51.0 μg/m3 (139) | 139.0 | |
| March 18, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 48.0 μg/m3 (131) | 131.0 | |
| March 18, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | N/A | 51.0 μg/m3 (139) | 139.0 | |
| March 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | N/A | N/A | 78.0 μg/m3 (162) | 162.0 | |
| March 18, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 78.0 μg/m3 (162) | 162.0 | |
| March 17, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 72.0 μg/m3 (159) | 159.0 | |
| March 17, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (8) | N/A | N/A | 77.0 μg/m3 (161) | 161.0 | |
| March 17, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (5) | N/A | N/A | 71.0 μg/m3 (158) | 158.0 | |
| March 17, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | N/A | 88.0 μg/m3 (167) | 167.0 | |
| March 17, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | N/A | 95.0 μg/m3 (171) | 171.0 | |
| March 17, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | N/A | 105.0 μg/m3 (176) | 176.0 | |
| March 17, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | N/A | 79.0 μg/m3 (162) | 162.0 | |
| March 17, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | N/A | 59.0 μg/m3 (152) | 152.0 | |
| March 17, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| March 17, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 52.0 μg/m3 (141) | 141.0 | |
| March 17, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 49.0 μg/m3 (134) | 134.0 | |
| March 17, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| March 17, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 43.0 μg/m3 (119) | 119.0 | |
| March 17, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | N/A | 19.0 μg/m3 (65) | 65.0 | |
| March 17, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 17, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | N/A | 39.0 μg/m3 (109) | 109.0 | |
| March 17, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (9) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 17, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| March 17, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (12) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 17, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (15) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 17, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 17, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (5) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 17, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (11) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| March 16, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (6) | N/A | N/A | 37.0 μg/m3 (104) | 104.0 | |
| March 16, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (2) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| March 16, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (13) | N/A | N/A | 34.0 μg/m3 (97) | 97.0 | |
| March 16, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | N/A | 34.0 μg/m3 (97) | 97.0 | |
| March 16, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (22) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 16, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 16, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (35) | N/A | N/A | 44.0 μg/m3 (121) | 121.0 | |
| March 16, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 65.0 μg/m3 (155) | 155.0 | |
| March 16, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (46) | N/A | N/A | 34.0 μg/m3 (97) | 97.0 | |
| March 16, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (44) | N/A | N/A | 31.0 μg/m3 (90) | 90.0 | |
| March 16, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (37) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 16, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (32) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 16, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (28) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 16, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| March 16, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (8) | N/A | N/A | 48.0 μg/m3 (131) | 131.0 | |
| March 16, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (2) | N/A | N/A | 38.0 μg/m3 (106) | 106.0 | |
| March 16, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 16, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 16, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (5) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| March 16, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 16, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| March 16, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (20) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| March 16, 2019, midnight | 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 | |
| March 15, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (19) | N/A | N/A | 22.0 μg/m3 (71) | 71.0 | |
| March 15, 2019, 10 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 | |
| March 15, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (17) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 15, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| March 15, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 15, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (25) | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 15, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (29) | N/A | N/A | 26.0 μg/m3 (80) | 80.0 | |
| March 15, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 15, 2019, 3 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 | |
| March 15, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 15, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 ppb (35) | N/A | N/A | 20.0 μg/m3 (67) | 67.0 | |
| March 15, 2019, noon | 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 | |
| March 15, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 15, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (24) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 15, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (15) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 15, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (5) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 15, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (18) | N/A | N/A | 27.0 μg/m3 (82) | 82.0 | |
| March 15, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (18) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 15, 2019, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (23) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 15, 2019, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 15, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | N/A | 30.0 μg/m3 (88) | 88.0 | |
| March 15, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 15, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (16) | N/A | N/A | 33.0 μg/m3 (95) | 95.0 | |
| March 15, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 | |
| March 14, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (7) | N/A | N/A | 37.0 μg/m3 (104) | 104.0 | |
| March 14, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (12) | N/A | N/A | 36.0 μg/m3 (101) | 101.0 | |
| March 14, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (22) | N/A | N/A | 42.0 μg/m3 (116) | 116.0 | |
| March 14, 2019, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (28) | N/A | N/A | 42.0 μg/m3 (116) | 116.0 | |
| March 14, 2019, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (41) | N/A | N/A | 40.0 μg/m3 (111) | 111.0 | |
| March 14, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 ppb (52) | N/A | N/A | 38.0 μg/m3 (106) | 106.0 | |
| March 14, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 70.0 ppb (54) | N/A | N/A | 29.0 μg/m3 (86) | 86.0 | |
| March 14, 2019, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 ppb (55) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 14, 2019, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 66.0 ppb (51) | N/A | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 14, 2019, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 ppb (49) | N/A | N/A | 23.0 μg/m3 (73) | 73.0 | |
| March 14, 2019, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (45) | N/A | N/A | 33.0 μg/m3 (95) | 95.0 | |
| March 14, 2019, noon | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (39) | N/A | N/A | 32.0 μg/m3 (93) | 93.0 | |
| March 14, 2019, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (27) | N/A | N/A | 36.0 μg/m3 (101) | 101.0 | |
| March 14, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (21) | N/A | N/A | 48.0 μg/m3 (131) | 131.0 | |
| March 14, 2019, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (10) | N/A | N/A | 62.0 μg/m3 (153) | 153.0 | |
| March 14, 2019, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 ppb (5) | N/A | N/A | 67.0 μg/m3 (156) | 156.0 | |
| March 14, 2019, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | N/A | N/A | 79.0 μg/m3 (162) | 162.0 | |
| March 14, 2019, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 66.0 μg/m3 (156) | 156.0 | |
| March 14, 2019, 5 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 | |
| March 14, 2019, 4 a.m. | 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 | |
| March 14, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 46.0 μg/m3 (126) | 126.0 | |
| March 14, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | N/A | N/A | 47.0 μg/m3 (129) | 129.0 | |
| March 14, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | N/A | N/A | 48.0 μg/m3 (131) | 131.0 | |
| March 14, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (32) | N/A | N/A | 35.0 μg/m3 (99) | 99.0 |