Baltimore Co MD, US: 39.310833, -76.474444
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 22, 2019, 7 a.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 1.0 ppb (1) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 22, 2019, 6 a.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 1.0 ppb (1) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 22, 2019, 5 a.m. | N/A | 0.1 ppb (0) | 4.3 ppb (4) | 5.0 ppb (5) | N/A | 1.0 ppb (1) | 37.0 ppb (28) | 0.1 ppb (1) | N/A | N/A | 28.0 | |
| March 22, 2019, 4 a.m. | N/A | 0.1 ppb (0) | 3.6 ppb (3) | 4.0 ppb (4) | N/A | 1.0 ppb (1) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 22, 2019, 3 a.m. | N/A | 0.1 ppb (0) | 3.9 ppb (4) | 5.0 ppb (5) | N/A | 1.0 ppb (1) | 37.0 ppb (28) | 0.1 ppb (1) | N/A | N/A | 28.0 | |
| March 22, 2019, 2 a.m. | N/A | 0.1 ppb (0) | 3.2 ppb (3) | 4.0 ppb (4) | N/A | 1.0 ppb (1) | 42.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 22, 2019, 1 a.m. | N/A | 0.1 ppb (0) | 3.1 ppb (3) | 4.0 ppb (4) | N/A | 1.0 ppb (1) | 42.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 22, 2019, midnight | N/A | 0.1 ppb (0) | 4.2 ppb (4) | 5.0 ppb (5) | N/A | 1.0 ppb (1) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 21, 2019, 11 p.m. | N/A | 0.0 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 1.0 ppb (1) | 46.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 21, 2019, 10 p.m. | N/A | 0.1 ppb (0) | 1.9 ppb (2) | 3.0 ppb (3) | N/A | 1.0 ppb (1) | 47.0 ppb (36) | 0.1 ppb (1) | N/A | N/A | 36.0 | |
| March 21, 2019, 9 p.m. | N/A | 0.1 ppb (0) | 2.9 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 21, 2019, 8 p.m. | N/A | 0.3 ppb (0) | 3.2 ppb (3) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 21, 2019, 7 p.m. | N/A | 0.5 ppb (0) | 4.7 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 21, 2019, 6 p.m. | N/A | 0.8 ppb (1) | 7.6 ppb (7) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.2 ppb (2) | N/A | N/A | 27.0 | |
| March 21, 2019, 5 p.m. | N/A | 0.9 ppb (1) | 9.2 ppb (9) | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.2 ppb (2) | N/A | N/A | 24.0 | |
| March 21, 2019, 4 p.m. | N/A | 1.2 ppb (1) | 11.5 ppb (11) | N/A | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.2 ppb (2) | N/A | N/A | 23.0 | |
| March 21, 2019, 3 p.m. | N/A | 1.2 ppb (1) | 13.4 ppb (12) | N/A | N/A | 0.0 ppb (0) | N/A | 0.2 ppb (2) | N/A | N/A | 12.0 | |
| March 21, 2019, 2 p.m. | N/A | 0.6 ppb (1) | 8.2 ppb (8) | N/A | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.2 ppb (2) | N/A | N/A | 26.0 | |
| March 21, 2019, 1 p.m. | N/A | 0.3 ppb (0) | 5.7 ppb (5) | N/A | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.2 ppb (2) | N/A | N/A | 28.0 | |
| March 21, 2019, noon | N/A | 0.3 ppb (0) | 6.3 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | N/A | 28.0 | |
| March 21, 2019, 11 a.m. | N/A | 0.3 ppb (0) | 5.7 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.2 ppb (2) | N/A | N/A | 28.0 | |
| March 21, 2019, 10 a.m. | N/A | 0.3 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.2 ppb (2) | N/A | N/A | 29.0 | |
| March 21, 2019, 9 a.m. | N/A | 0.2 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | N/A | 29.0 | |
| March 21, 2019, 8 a.m. | N/A | 0.1 ppb (0) | 4.2 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | N/A | 29.0 | |
| March 21, 2019, 7 a.m. | N/A | 0.1 ppb (0) | 4.7 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 21, 2019, 6 a.m. | N/A | 0.0 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 21, 2019, 5 a.m. | N/A | 0.0 ppb (0) | 3.9 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 21, 2019, 4 a.m. | N/A | 0.0 ppb (0) | 3.2 ppb (3) | 3.0 ppb (3) | N/A | N/A | 45.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 21, 2019, 3 a.m. | N/A | 0.0 ppb (0) | 3.1 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.1 ppb (1) | N/A | N/A | 36.0 | |
| March 21, 2019, 2 a.m. | N/A | 0.4 ppb (0) | 4.1 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.1 ppb (1) | N/A | N/A | 37.0 | |
| March 21, 2019, 1 a.m. | N/A | 0.3 ppb (0) | 3.6 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.1 ppb (1) | N/A | N/A | 37.0 | |
| March 21, 2019, midnight | N/A | 0.2 ppb (0) | 3.9 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 20, 2019, 11 p.m. | N/A | 0.1 ppb (0) | 3.9 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 20, 2019, 10 p.m. | N/A | 0.3 ppb (0) | 6.4 ppb (6) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 53.0 ppb (41) | 0.1 ppb (1) | N/A | N/A | 41.0 | |
| March 20, 2019, 9 p.m. | N/A | 0.3 ppb (0) | 5.5 ppb (5) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 54.0 ppb (42) | 0.1 ppb (1) | N/A | N/A | 42.0 | |
| March 20, 2019, 8 p.m. | N/A | 0.6 ppb (1) | 5.5 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 54.0 ppb (42) | 0.1 ppb (1) | N/A | N/A | 42.0 | |
| March 20, 2019, 7 p.m. | N/A | 0.9 ppb (1) | 6.4 ppb (6) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 53.0 ppb (41) | 0.1 ppb (1) | N/A | N/A | 41.0 | |
| March 20, 2019, 6 p.m. | N/A | N/A | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 54.0 ppb (42) | 0.1 ppb (1) | N/A | N/A | 42.0 | |
| March 20, 2019, 5 p.m. | N/A | N/A | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 54.0 ppb (42) | 0.1 ppb (1) | N/A | N/A | 42.0 | |
| March 20, 2019, 4 p.m. | N/A | N/A | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.2 ppb (2) | N/A | N/A | 38.0 | |
| March 20, 2019, 3 p.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.2 ppb (2) | N/A | N/A | 31.0 | |
| March 20, 2019, 2 p.m. | N/A | N/A | N/A | 25.0 ppb (23) | N/A | 1.0 ppb (1) | 30.0 ppb (23) | 0.3 ppb (3) | N/A | N/A | 23.0 | |
| March 20, 2019, 1 p.m. | N/A | 41.6 ppb (39) | 78.7 ppb (76) | 39.0 ppb (36) | N/A | 2.0 ppb (3) | 13.0 ppb (10) | 0.5 ppb (6) | N/A | N/A | 76.0 | |
| March 20, 2019, noon | N/A | 96.0 ppb (95) | 138.0 ppb (107) | 42.0 ppb (39) | N/A | 3.0 ppb (4) | 3.0 ppb (2) | 1.1 ppb (12) | N/A | N/A | 107.0 | |
| March 20, 2019, 11 a.m. | N/A | 128.9 ppb (105) | 171.8 ppb (114) | 42.0 ppb (39) | N/A | 4.0 ppb (6) | 1.0 ppb (1) | 1.5 ppb (17) | N/A | N/A | 114.0 | |
| March 20, 2019, 10 a.m. | N/A | 88.4 ppb (87) | 125.8 ppb (105) | N/A | N/A | 2.0 ppb (3) | 1.0 ppb (1) | 0.8 ppb (9) | N/A | N/A | 105.0 | |
| March 20, 2019, 9 a.m. | N/A | 58.1 ppb (54) | 95.3 ppb (94) | 35.0 ppb (32) | N/A | N/A | 1.0 ppb (1) | 0.7 ppb (8) | N/A | N/A | 94.0 | |
| March 20, 2019, 8 a.m. | N/A | 58.1 ppb (54) | 94.5 ppb (93) | 35.0 ppb (32) | N/A | 2.0 ppb (3) | 1.0 ppb (1) | 0.6 ppb (7) | N/A | N/A | 93.0 | |
| March 20, 2019, 7 a.m. | N/A | N/A | N/A | 36.0 ppb (33) | N/A | 2.0 ppb (3) | 1.0 ppb (1) | 0.5 ppb (6) | N/A | N/A | 33.0 | |
| March 20, 2019, 6 a.m. | N/A | N/A | N/A | 35.0 ppb (32) | N/A | 1.0 ppb (1) | 1.0 ppb (1) | 0.5 ppb (6) | N/A | N/A | 32.0 | |
| March 20, 2019, 5 a.m. | N/A | 20.2 ppb (19) | 57.5 ppb (54) | 37.0 ppb (34) | N/A | 1.0 ppb (1) | 1.0 ppb (1) | 0.5 ppb (6) | N/A | N/A | 54.0 | |
| March 20, 2019, 4 a.m. | N/A | 17.5 ppb (16) | 54.5 ppb (51) | 36.0 ppb (33) | N/A | N/A | 1.0 ppb (1) | 0.5 ppb (6) | N/A | N/A | 51.0 | |
| March 20, 2019, 3 a.m. | N/A | 4.8 ppb (4) | 38.8 ppb (36) | 36.0 ppb (33) | N/A | 1.0 ppb (1) | 4.0 ppb (3) | 0.4 ppb (4) | N/A | N/A | 36.0 | |
| March 20, 2019, 2 a.m. | N/A | 1.1 ppb (1) | 23.7 ppb (22) | 28.0 ppb (26) | N/A | 0.0 ppb (0) | 16.0 ppb (12) | 0.3 ppb (3) | N/A | N/A | 26.0 | |
| March 20, 2019, 1 a.m. | N/A | 0.4 ppb (0) | 15.1 ppb (14) | 16.0 ppb (15) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.2 ppb (2) | N/A | N/A | 25.0 | |
| March 20, 2019, midnight | N/A | 0.4 ppb (0) | 12.7 ppb (12) | 14.0 ppb (13) | N/A | 1.0 ppb (1) | 38.0 ppb (29) | 0.2 ppb (2) | N/A | N/A | 29.0 | |
| March 19, 2019, 11 p.m. | N/A | 1.0 ppb (1) | 9.7 ppb (9) | 10.0 ppb (9) | N/A | 1.0 ppb (1) | 44.0 ppb (34) | 0.2 ppb (2) | N/A | N/A | 34.0 | |
| March 19, 2019, 10 p.m. | N/A | 0.8 ppb (1) | 7.5 ppb (7) | 7.0 ppb (6) | N/A | 2.0 ppb (3) | 47.0 ppb (36) | 0.1 ppb (1) | N/A | N/A | 36.0 | |
| March 19, 2019, 9 p.m. | N/A | 1.1 ppb (1) | 6.9 ppb (6) | 6.0 ppb (6) | N/A | 1.0 ppb (1) | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 19, 2019, 8 p.m. | N/A | 1.2 ppb (1) | 6.3 ppb (6) | 5.0 ppb (5) | N/A | 1.0 ppb (1) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 19, 2019, 7 p.m. | N/A | 1.5 ppb (1) | 5.9 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 19, 2019, 6 p.m. | N/A | 1.1 ppb (1) | 4.2 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.1 ppb (1) | N/A | N/A | 39.0 | |
| March 19, 2019, 5 p.m. | N/A | 0.8 ppb (1) | 3.4 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.1 ppb (1) | N/A | N/A | 39.0 | |
| March 19, 2019, 4 p.m. | N/A | 1.2 ppb (1) | 4.3 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 19, 2019, 3 p.m. | N/A | 1.1 ppb (1) | 3.9 ppb (4) | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 19, 2019, 2 p.m. | N/A | 0.9 ppb (1) | 4.2 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.1 ppb (1) | N/A | N/A | 37.0 | |
| March 19, 2019, 1 p.m. | N/A | 1.8 ppb (2) | 7.9 ppb (7) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 19, 2019, noon | N/A | 8.2 ppb (8) | 29.8 ppb (28) | 23.0 ppb (21) | N/A | 1.0 ppb (1) | 25.0 ppb (19) | 0.3 ppb (3) | N/A | N/A | 28.0 | |
| March 19, 2019, 11 a.m. | N/A | 20.1 ppb (19) | 59.0 ppb (55) | 41.0 ppb (38) | N/A | 1.0 ppb (1) | 3.0 ppb (2) | 0.6 ppb (7) | N/A | N/A | 55.0 | |
| March 19, 2019, 10 a.m. | N/A | 1.6 ppb (1) | 29.4 ppb (27) | 32.0 ppb (30) | N/A | 1.0 ppb (1) | 11.0 ppb (8) | 0.3 ppb (3) | N/A | N/A | 30.0 | |
| March 19, 2019, 9 a.m. | N/A | 1.3 ppb (1) | 23.6 ppb (22) | N/A | N/A | 0.0 ppb (0) | 17.0 ppb (13) | 0.2 ppb (2) | N/A | N/A | 22.0 | |
| March 19, 2019, 8 a.m. | N/A | 0.5 ppb (0) | 16.7 ppb (15) | 19.0 ppb (18) | N/A | N/A | 23.0 ppb (18) | 0.2 ppb (2) | N/A | N/A | 18.0 | |
| March 19, 2019, 7 a.m. | N/A | 2.4 ppb (2) | 16.5 ppb (15) | 17.0 ppb (16) | N/A | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 16.0 | |
| March 19, 2019, 6 a.m. | N/A | 0.3 ppb (0) | 11.5 ppb (11) | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.2 ppb (2) | N/A | N/A | 24.0 | |
| March 19, 2019, 5 a.m. | N/A | 0.2 ppb (0) | 10.8 ppb (10) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.2 ppb (2) | N/A | N/A | 25.0 | |
| March 19, 2019, 4 a.m. | N/A | 0.3 ppb (0) | 12.7 ppb (12) | 12.0 ppb (11) | N/A | N/A | 34.0 ppb (26) | 0.2 ppb (2) | N/A | N/A | 26.0 | |
| March 19, 2019, 3 a.m. | N/A | 0.3 ppb (0) | 21.6 ppb (20) | 21.0 ppb (19) | N/A | 1.0 ppb (1) | 25.0 ppb (19) | 0.2 ppb (2) | N/A | N/A | 20.0 | |
| March 19, 2019, 2 a.m. | N/A | 0.7 ppb (1) | 22.0 ppb (20) | 22.0 ppb (20) | N/A | 1.0 ppb (1) | 25.0 ppb (19) | 0.2 ppb (2) | N/A | N/A | 20.0 | |
| March 19, 2019, 1 a.m. | N/A | 0.5 ppb (0) | 14.1 ppb (13) | 14.0 ppb (13) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.2 ppb (2) | N/A | N/A | 27.0 | |
| March 19, 2019, midnight | N/A | 0.6 ppb (1) | 8.6 ppb (8) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.2 ppb (2) | N/A | N/A | 33.0 | |
| March 18, 2019, 11 p.m. | N/A | 0.3 ppb (0) | 7.4 ppb (7) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.2 ppb (2) | N/A | N/A | 35.0 | |
| March 18, 2019, 10 p.m. | N/A | 0.7 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.2 ppb (2) | N/A | N/A | 38.0 | |
| March 18, 2019, 9 p.m. | N/A | 0.9 ppb (1) | 6.6 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.1 ppb (1) | N/A | N/A | 37.0 | |
| March 18, 2019, 8 p.m. | N/A | 1.3 ppb (1) | 6.3 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.2 ppb (2) | N/A | N/A | 36.0 | |
| March 18, 2019, 7 p.m. | N/A | 0.8 ppb (1) | 4.6 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.1 ppb (1) | N/A | N/A | 37.0 | |
| March 18, 2019, 6 p.m. | N/A | 0.9 ppb (1) | 4.5 ppb (4) | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (36) | 0.1 ppb (1) | N/A | N/A | 36.0 | |
| March 18, 2019, 5 p.m. | N/A | 1.3 ppb (1) | 5.1 ppb (5) | 4.0 ppb (4) | N/A | N/A | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 18, 2019, 4 p.m. | N/A | 1.7 ppb (2) | 6.0 ppb (6) | 4.0 ppb (4) | N/A | N/A | 41.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 18, 2019, 3 p.m. | N/A | 1.6 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | N/A | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 18, 2019, 2 p.m. | N/A | 1.8 ppb (2) | 7.3 ppb (7) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | N/A | 29.0 | |
| March 18, 2019, 1 p.m. | N/A | 2.5 ppb (2) | 12.3 ppb (11) | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.2 ppb (2) | N/A | N/A | 25.0 | |
| March 18, 2019, noon | N/A | 3.8 ppb (4) | 20.2 ppb (19) | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 21.0 ppb (16) | 0.2 ppb (2) | N/A | N/A | 19.0 | |
| March 18, 2019, 11 a.m. | N/A | 1.7 ppb (2) | 22.4 ppb (21) | 22.0 ppb (20) | N/A | 0.0 ppb (0) | 16.0 ppb (12) | 0.2 ppb (2) | N/A | N/A | 21.0 | |
| March 18, 2019, 10 a.m. | N/A | 0.9 ppb (1) | 20.5 ppb (19) | 21.0 ppb (19) | N/A | 0.0 ppb (0) | 15.0 ppb (12) | 0.2 ppb (2) | N/A | N/A | 19.0 | |
| March 18, 2019, 9 a.m. | N/A | 1.5 ppb (1) | 22.9 ppb (21) | 23.0 ppb (21) | N/A | N/A | 14.0 ppb (11) | 0.2 ppb (2) | N/A | N/A | 21.0 | |
| March 18, 2019, 8 a.m. | N/A | 3.4 ppb (3) | 30.2 ppb (28) | 27.0 ppb (25) | N/A | 0.0 ppb (0) | 12.0 ppb (9) | 0.3 ppb (3) | N/A | N/A | 28.0 | |
| March 18, 2019, 7 a.m. | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.2 ppb (2) | N/A | N/A | 20.0 | |
| March 18, 2019, 6 a.m. | N/A | N/A | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 18, 2019, 5 a.m. | N/A | 0.1 ppb (0) | 3.9 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 18, 2019, 4 a.m. | N/A | 0.1 ppb (0) | 5.4 ppb (5) | 5.0 ppb (5) | N/A | N/A | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 18, 2019, 3 a.m. | N/A | 0.1 ppb (0) | 10.0 ppb (9) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.2 ppb (2) | N/A | N/A | 28.0 | |
| March 18, 2019, 2 a.m. | N/A | 0.2 ppb (0) | 10.2 ppb (9) | 10.0 ppb (9) | N/A | 1.0 ppb (1) | 37.0 ppb (28) | 0.2 ppb (2) | N/A | N/A | 28.0 | |
| March 18, 2019, 1 a.m. | N/A | 0.1 ppb (0) | 8.6 ppb (8) | 9.0 ppb (8) | N/A | 1.0 ppb (1) | 39.0 ppb (30) | 0.2 ppb (2) | N/A | N/A | 30.0 | |
| March 18, 2019, midnight | N/A | 0.3 ppb (0) | 8.0 ppb (7) | 9.0 ppb (8) | N/A | 1.0 ppb (1) | 41.0 ppb (32) | 0.2 ppb (2) | N/A | N/A | 32.0 | |
| March 17, 2019, 11 p.m. | N/A | 0.2 ppb (0) | 5.7 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.2 ppb (2) | N/A | N/A | 35.0 | |
| March 17, 2019, 10 p.m. | N/A | 0.1 ppb (0) | 2.7 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 17, 2019, 9 p.m. | N/A | 0.4 ppb (0) | 2.8 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.1 ppb (1) | N/A | N/A | 39.0 | |
| March 17, 2019, 8 p.m. | N/A | 0.4 ppb (0) | 2.7 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 52.0 ppb (40) | 0.1 ppb (1) | N/A | N/A | 40.0 | |
| March 17, 2019, 7 p.m. | N/A | 0.3 ppb (0) | 2.1 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 52.0 ppb (40) | 0.1 ppb (1) | N/A | N/A | 40.0 | |
| March 17, 2019, 6 p.m. | N/A | 0.4 ppb (0) | 2.4 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 17, 2019, 5 p.m. | N/A | 0.6 ppb (1) | 2.7 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 17, 2019, 4 p.m. | N/A | 0.8 ppb (1) | 3.3 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 17, 2019, 3 p.m. | N/A | 0.8 ppb (1) | 3.3 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 17, 2019, 2 p.m. | N/A | 1.1 ppb (1) | 4.9 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 17, 2019, 1 p.m. | N/A | 1.6 ppb (1) | 7.1 ppb (7) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 17, 2019, noon | N/A | 13.0 ppb (12) | 36.3 ppb (34) | 27.0 ppb (25) | N/A | 1.0 ppb (1) | 19.0 ppb (15) | 0.3 ppb (3) | N/A | N/A | 34.0 | |
| March 17, 2019, 11 a.m. | N/A | 8.3 ppb (8) | 40.9 ppb (38) | 33.0 ppb (31) | N/A | 0.0 ppb (0) | 4.0 ppb (3) | 0.4 ppb (4) | N/A | N/A | 38.0 | |
| March 17, 2019, 10 a.m. | N/A | 3.2 ppb (3) | 31.7 ppb (29) | 32.0 ppb (30) | N/A | 0.0 ppb (0) | 3.0 ppb (2) | 0.3 ppb (3) | N/A | N/A | 30.0 | |
| March 17, 2019, 9 a.m. | N/A | 1.5 ppb (1) | 21.6 ppb (20) | 28.0 ppb (26) | N/A | 0.0 ppb (0) | 8.0 ppb (6) | 0.3 ppb (3) | N/A | N/A | 26.0 | |
| March 17, 2019, 8 a.m. | N/A | 2.7 ppb (3) | 27.7 ppb (26) | 26.0 ppb (24) | N/A | 0.0 ppb (0) | 9.0 ppb (7) | 0.2 ppb (2) | N/A | N/A | 26.0 | |
| March 17, 2019, 7 a.m. | N/A | 0.3 ppb (0) | 14.3 ppb (13) | 15.0 ppb (14) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.2 ppb (2) | N/A | N/A | 17.0 | |
| March 17, 2019, 6 a.m. | N/A | 0.4 ppb (0) | 9.1 ppb (8) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.1 ppb (1) | N/A | N/A | 25.0 | |
| March 17, 2019, 5 a.m. | N/A | 0.2 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | N/A | 29.0 | |
| March 17, 2019, 4 a.m. | N/A | 0.1 ppb (0) | 3.7 ppb (3) | 4.0 ppb (4) | N/A | N/A | 42.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 17, 2019, 3 a.m. | N/A | 0.1 ppb (0) | 3.2 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 17, 2019, 2 a.m. | N/A | 0.1 ppb (0) | 3.2 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 17, 2019, 1 a.m. | N/A | 0.2 ppb (0) | 3.1 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 17, 2019, midnight | N/A | 0.2 ppb (0) | 3.5 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 16, 2019, 11 p.m. | N/A | 0.1 ppb (0) | 2.7 ppb (3) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.1 ppb (1) | N/A | N/A | 37.0 | |
| March 16, 2019, 10 p.m. | N/A | 0.2 ppb (0) | 2.2 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 16, 2019, 9 p.m. | N/A | 0.2 ppb (0) | 2.1 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 52.0 ppb (40) | 0.1 ppb (1) | N/A | N/A | 40.0 | |
| March 16, 2019, 8 p.m. | N/A | 0.3 ppb (0) | 2.1 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 53.0 ppb (41) | 0.1 ppb (1) | N/A | N/A | 41.0 | |
| March 16, 2019, 7 p.m. | N/A | 0.2 ppb (0) | 2.0 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 53.0 ppb (41) | 0.1 ppb (1) | N/A | N/A | 41.0 | |
| March 16, 2019, 6 p.m. | N/A | 0.4 ppb (0) | 2.2 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 52.0 ppb (40) | 0.1 ppb (1) | N/A | N/A | 40.0 | |
| March 16, 2019, 5 p.m. | N/A | 0.5 ppb (0) | 2.2 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.1 ppb (1) | N/A | N/A | 39.0 | |
| March 16, 2019, 4 p.m. | N/A | 0.4 ppb (0) | 1.9 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 16, 2019, 3 p.m. | N/A | 0.4 ppb (0) | 1.8 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 16, 2019, 2 p.m. | N/A | 0.5 ppb (0) | 1.7 ppb (2) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.1 ppb (1) | N/A | N/A | 38.0 | |
| March 16, 2019, 1 p.m. | N/A | 0.5 ppb (0) | 2.3 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 16, 2019, noon | N/A | 1.6 ppb (1) | 4.8 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 16, 2019, 11 a.m. | N/A | 0.3 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 16, 2019, 10 a.m. | N/A | 0.1 ppb (0) | 3.1 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 16, 2019, 9 a.m. | N/A | 0.0 ppb (0) | 1.9 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 16, 2019, 8 a.m. | N/A | 0.1 ppb (0) | 1.8 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 16, 2019, 7 a.m. | N/A | 0.0 ppb (0) | 1.7 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 16, 2019, 6 a.m. | N/A | 0.0 ppb (0) | 1.8 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 16, 2019, 5 a.m. | N/A | 0.0 ppb (0) | 1.7 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 16, 2019, 4 a.m. | N/A | 0.0 ppb (0) | 1.8 ppb (2) | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 16, 2019, 3 a.m. | N/A | 0.0 ppb (0) | 1.9 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.1 ppb (1) | N/A | N/A | 36.0 | |
| March 16, 2019, 2 a.m. | N/A | 0.0 ppb (0) | 3.8 ppb (4) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.1 ppb (1) | N/A | N/A | 35.0 | |
| March 16, 2019, 1 a.m. | N/A | 0.1 ppb (0) | 5.7 ppb (5) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 16, 2019, midnight | N/A | 0.3 ppb (0) | 5.6 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.1 ppb (1) | N/A | N/A | 25.0 | |
| March 15, 2019, 11 p.m. | N/A | 0.3 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | N/A | 25.0 | |
| March 15, 2019, 10 p.m. | N/A | 0.5 ppb (0) | 5.3 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | N/A | 28.0 | |
| March 15, 2019, 9 p.m. | N/A | 0.7 ppb (1) | 4.7 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 15, 2019, 8 p.m. | N/A | 0.9 ppb (1) | 5.5 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | N/A | 31.0 | |
| March 15, 2019, 7 p.m. | N/A | 1.0 ppb (1) | 6.3 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.1 ppb (1) | N/A | N/A | 32.0 | |
| March 15, 2019, 6 p.m. | N/A | 0.8 ppb (1) | 5.3 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 15, 2019, 5 p.m. | N/A | 0.8 ppb (1) | 4.7 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | N/A | 34.0 | |
| March 15, 2019, 4 p.m. | N/A | 1.1 ppb (1) | 6.3 ppb (6) | 5.0 ppb (5) | N/A | 1.0 ppb (1) | 43.0 ppb (33) | 0.1 ppb (1) | N/A | N/A | 33.0 | |
| March 15, 2019, 3 p.m. | N/A | 1.5 ppb (1) | 7.6 ppb (7) | 7.0 ppb (6) | N/A | 1.0 ppb (1) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | N/A | 29.0 | |
| March 15, 2019, 2 p.m. | N/A | 1.3 ppb (1) | 7.0 ppb (6) | 7.0 ppb (6) | N/A | 1.0 ppb (1) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | N/A | 28.0 | |
| March 15, 2019, 1 p.m. | N/A | 1.7 ppb (2) | 10.5 ppb (10) | 10.0 ppb (9) | N/A | N/A | 32.0 ppb (25) | 0.2 ppb (2) | N/A | N/A | 25.0 | |
| March 15, 2019, noon | N/A | 1.0 ppb (1) | 9.2 ppb (9) | 10.0 ppb (9) | N/A | N/A | 33.0 ppb (25) | 0.1 ppb (1) | N/A | N/A | 25.0 | |
| March 15, 2019, 11 a.m. | N/A | 0.5 ppb (0) | 8.5 ppb (8) | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | N/A | 25.0 | |
| March 15, 2019, 10 a.m. | N/A | 0.3 ppb (0) | 7.3 ppb (7) | 8.0 ppb (7) | N/A | 1.0 ppb (1) | 34.0 ppb (26) | 0.1 ppb (1) | N/A | N/A | 26.0 | |
| March 15, 2019, 9 a.m. | N/A | 0.2 ppb (0) | 5.2 ppb (5) | 6.0 ppb (6) | N/A | N/A | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 | |
| March 15, 2019, 8 a.m. | N/A | 0.1 ppb (0) | 9.6 ppb (9) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | N/A | 30.0 |