Ontario CA, US: 34.0309, -117.617403
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 20, 2019, 1 a.m. | 23.3 ppb (22) | 8.7 ppb (8) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 | |
| May 20, 2019, midnight | 19.0 ppb (18) | 7.2 ppb (7) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 | |
| May 19, 2019, 11 p.m. | 19.4 ppb (18) | 7.8 ppb (7) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 | |
| May 19, 2019, 10 p.m. | 21.8 ppb (20) | 8.6 ppb (8) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| May 19, 2019, 9 p.m. | 21.6 ppb (20) | 9.7 ppb (9) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| May 19, 2019, 8 p.m. | 19.3 ppb (18) | 8.1 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 | |
| May 19, 2019, 7 p.m. | 27.3 ppb (25) | 10.8 ppb (10) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| May 19, 2019, 6 p.m. | 20.5 ppb (19) | 7.6 ppb (7) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 | |
| May 19, 2019, 5 p.m. | 9.9 ppb (9) | 2.0 ppb (2) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 | |
| May 19, 2019, 4 p.m. | 18.0 ppb (17) | 5.8 ppb (5) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 | |
| May 19, 2019, 3 p.m. | 14.9 ppb (14) | 3.2 ppb (3) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 | |
| May 19, 2019, 2 p.m. | 11.0 ppb (10) | 2.1 ppb (2) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 | |
| May 19, 2019, 1 p.m. | 26.5 ppb (25) | 7.1 ppb (7) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| May 19, 2019, noon | 27.0 ppb (25) | 6.7 ppb (6) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| May 19, 2019, 11 a.m. | 10.1 ppb (9) | 1.6 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 | |
| May 19, 2019, 10 a.m. | 13.5 ppb (12) | 3.1 ppb (3) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 | |
| May 19, 2019, 9 a.m. | 7.7 ppb (7) | 1.2 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 | |
| May 19, 2019, 8 a.m. | 14.2 ppb (13) | 3.3 ppb (3) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 | |
| May 19, 2019, 7 a.m. | 25.9 ppb (24) | 7.9 ppb (7) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| May 19, 2019, 6 a.m. | 16.8 ppb (16) | 3.0 ppb (3) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 | |
| May 19, 2019, 5 a.m. | 25.4 ppb (24) | 7.8 ppb (7) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| May 19, 2019, 4 a.m. | 21.9 ppb (20) | 7.6 ppb (7) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| May 19, 2019, 3 a.m. | 26.0 ppb (24) | 8.9 ppb (8) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| May 19, 2019, 2 a.m. | 28.2 ppb (26) | 9.3 ppb (9) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 | |
| May 19, 2019, 1 a.m. | 30.2 ppb (28) | 9.9 ppb (9) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 | |
| May 19, 2019, midnight | 31.2 ppb (29) | 10.9 ppb (10) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| May 18, 2019, 11 p.m. | 24.6 ppb (23) | 8.4 ppb (8) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 | |
| May 18, 2019, 10 p.m. | 25.2 ppb (23) | 8.0 ppb (7) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 | |
| May 18, 2019, 9 p.m. | 27.1 ppb (25) | 9.0 ppb (8) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| May 18, 2019, 8 p.m. | 27.7 ppb (26) | 9.2 ppb (9) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 | |
| May 18, 2019, 7 p.m. | 30.3 ppb (28) | 11.8 ppb (11) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 | |
| May 18, 2019, 6 p.m. | 29.5 ppb (27) | 11.6 ppb (11) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| May 18, 2019, 5 p.m. | 35.7 ppb (33) | 14.7 ppb (14) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 | |
| May 18, 2019, 4 p.m. | 45.0 ppb (42) | 19.7 ppb (18) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 | |
| May 18, 2019, 3 p.m. | 53.2 ppb (49) | 26.3 ppb (24) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 18, 2019, 2 p.m. | 52.5 ppb (49) | 27.0 ppb (25) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 18, 2019, 1 p.m. | 86.7 ppb (85) | 54.0 ppb (50) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 85.0 | |
| May 18, 2019, noon | 53.0 ppb (49) | 22.4 ppb (21) | N/A | 31.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 18, 2019, 11 a.m. | 63.9 ppb (61) | 31.8 ppb (29) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 | |
| May 18, 2019, 10 a.m. | 29.6 ppb (27) | 4.8 ppb (4) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| May 18, 2019, 9 a.m. | 47.1 ppb (44) | 15.2 ppb (14) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 18, 2019, 8 a.m. | 21.3 ppb (20) | 1.6 ppb (1) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| May 18, 2019, 7 a.m. | 38.4 ppb (36) | 7.9 ppb (7) | N/A | 31.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 | |
| May 18, 2019, 6 a.m. | 22.6 ppb (21) | 3.1 ppb (3) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 | |
| May 18, 2019, 5 a.m. | 26.2 ppb (24) | 6.6 ppb (6) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| May 18, 2019, 4 a.m. | 47.2 ppb (44) | 15.2 ppb (14) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 18, 2019, 3 a.m. | 51.0 ppb (47) | 18.9 ppb (18) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| May 18, 2019, 2 a.m. | 46.5 ppb (43) | 17.4 ppb (16) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| May 18, 2019, 1 a.m. | 46.0 ppb (43) | 19.0 ppb (18) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| May 18, 2019, midnight | 47.7 ppb (44) | 20.2 ppb (19) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 17, 2019, 11 p.m. | 50.0 ppb (46) | 21.5 ppb (20) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 17, 2019, 10 p.m. | 49.5 ppb (46) | 20.8 ppb (19) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 17, 2019, 9 p.m. | 52.8 ppb (49) | 22.5 ppb (21) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 17, 2019, 8 p.m. | 39.7 ppb (37) | 16.8 ppb (16) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| May 17, 2019, 7 p.m. | 60.9 ppb (57) | 30.1 ppb (28) | N/A | 31.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| May 17, 2019, 6 p.m. | 31.6 ppb (29) | 13.8 ppb (13) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| May 17, 2019, 5 p.m. | 50.2 ppb (46) | 23.6 ppb (22) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 17, 2019, 4 p.m. | 55.6 ppb (52) | 29.0 ppb (27) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 | |
| May 17, 2019, 3 p.m. | 37.0 ppb (34) | 18.2 ppb (17) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 | |
| May 17, 2019, 2 p.m. | 89.6 ppb (88) | 57.9 ppb (54) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 88.0 | |
| May 17, 2019, 1 p.m. | 114.5 ppb (103) | 79.0 ppb (77) | N/A | 36.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 103.0 | |
| May 17, 2019, noon | 119.5 ppb (104) | 82.5 ppb (80) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 104.0 | |
| May 17, 2019, 11 a.m. | 52.7 ppb (49) | 26.5 ppb (25) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 17, 2019, 10 a.m. | 49.0 ppb (45) | 19.6 ppb (18) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| May 17, 2019, 9 a.m. | 16.0 ppb (15) | 4.0 ppb (4) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 | |
| May 17, 2019, 8 a.m. | 15.9 ppb (15) | 2.7 ppb (3) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 | |
| May 17, 2019, 7 a.m. | 39.9 ppb (37) | 13.4 ppb (12) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| May 17, 2019, 6 a.m. | 41.0 ppb (38) | 13.5 ppb (12) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 | |
| May 17, 2019, 5 a.m. | 47.9 ppb (44) | 18.2 ppb (17) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 17, 2019, 4 a.m. | 39.8 ppb (37) | 15.2 ppb (14) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| May 17, 2019, 3 a.m. | 37.0 ppb (34) | 13.8 ppb (13) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 | |
| May 17, 2019, 2 a.m. | 39.0 ppb (36) | 16.0 ppb (15) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 | |
| May 17, 2019, 1 a.m. | 35.8 ppb (33) | 15.0 ppb (14) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 | |
| May 17, 2019, midnight | 38.0 ppb (35) | 17.4 ppb (16) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 | |
| May 16, 2019, 11 p.m. | 42.3 ppb (39) | 19.8 ppb (18) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 | |
| May 16, 2019, 10 p.m. | 47.8 ppb (44) | 21.7 ppb (20) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 16, 2019, 9 p.m. | 47.9 ppb (44) | 22.2 ppb (21) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 16, 2019, 8 p.m. | 49.7 ppb (46) | 25.7 ppb (24) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 16, 2019, 7 p.m. | 68.3 ppb (65) | 40.1 ppb (37) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 65.0 | |
| May 16, 2019, 6 p.m. | 42.8 ppb (40) | 23.1 ppb (21) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 | |
| May 16, 2019, 5 p.m. | 38.0 ppb (35) | 21.8 ppb (20) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 | |
| May 16, 2019, 4 p.m. | 72.8 ppb (70) | 43.8 ppb (41) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 70.0 | |
| May 16, 2019, 3 p.m. | 21.3 ppb (20) | 4.8 ppb (4) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| May 16, 2019, 2 p.m. | 31.8 ppb (29) | 14.0 ppb (13) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| May 16, 2019, 1 p.m. | 13.1 ppb (12) | 2.6 ppb (2) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 | |
| May 16, 2019, noon | 47.6 ppb (44) | 24.5 ppb (23) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 16, 2019, 11 a.m. | 57.3 ppb (54) | 30.5 ppb (28) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 | |
| May 16, 2019, 10 a.m. | 26.9 ppb (25) | 10.4 ppb (10) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| May 16, 2019, 9 a.m. | 44.5 ppb (41) | 21.1 ppb (20) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 | |
| May 16, 2019, 8 a.m. | 27.8 ppb (26) | 10.4 ppb (10) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 | |
| May 16, 2019, 7 a.m. | 16.3 ppb (15) | 4.7 ppb (4) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 | |
| May 16, 2019, 6 a.m. | 38.9 ppb (36) | 16.5 ppb (15) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 | |
| May 16, 2019, 5 a.m. | 43.8 ppb (41) | 18.3 ppb (17) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 | |
| May 16, 2019, 4 a.m. | 44.2 ppb (41) | 18.7 ppb (17) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 | |
| May 16, 2019, 3 a.m. | 42.4 ppb (39) | 18.8 ppb (17) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 | |
| May 16, 2019, 2 a.m. | 37.5 ppb (35) | 17.2 ppb (16) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 | |
| May 16, 2019, 1 a.m. | 37.4 ppb (35) | 15.3 ppb (14) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 | |
| May 16, 2019, midnight | 45.6 ppb (42) | 19.1 ppb (18) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 | |
| May 15, 2019, 11 p.m. | 56.6 ppb (53) | 25.1 ppb (23) | N/A | 31.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 | |
| May 15, 2019, 10 p.m. | 47.5 ppb (44) | 20.0 ppb (19) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| May 15, 2019, 9 p.m. | 50.3 ppb (47) | 21.0 ppb (19) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| May 15, 2019, 8 p.m. | 65.7 ppb (62) | 30.6 ppb (28) | N/A | 35.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 | |
| May 15, 2019, 7 p.m. | 63.6 ppb (60) | 31.5 ppb (29) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 | |
| May 15, 2019, 6 p.m. | 68.1 ppb (65) | 35.7 ppb (33) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 65.0 | |
| May 15, 2019, 5 p.m. | 78.9 ppb (76) | 42.6 ppb (39) | N/A | 36.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 76.0 | |
| May 15, 2019, 4 p.m. | 79.7 ppb (77) | 44.2 ppb (41) | N/A | 35.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 77.0 | |
| May 15, 2019, 3 p.m. | 73.6 ppb (71) | 39.4 ppb (36) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 | |
| May 15, 2019, 2 p.m. | 76.7 ppb (74) | 40.4 ppb (37) | N/A | 36.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 74.0 | |
| May 15, 2019, 1 p.m. | 77.4 ppb (75) | 40.8 ppb (38) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 75.0 | |
| May 15, 2019, noon | 36.0 ppb (33) | 15.4 ppb (14) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 | |
| May 15, 2019, 11 a.m. | 22.6 ppb (21) | 7.2 ppb (7) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 | |
| May 15, 2019, 10 a.m. | 49.1 ppb (45) | 20.6 ppb (19) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| May 15, 2019, 9 a.m. | 48.3 ppb (45) | 20.3 ppb (19) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| May 15, 2019, 8 a.m. | 28.9 ppb (27) | 8.2 ppb (8) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| May 15, 2019, 7 a.m. | 43.1 ppb (40) | 15.5 ppb (14) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 | |
| May 15, 2019, 6 a.m. | 49.9 ppb (46) | 19.1 ppb (18) | N/A | 31.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 15, 2019, 5 a.m. | 50.6 ppb (47) | 20.2 ppb (19) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| May 15, 2019, 4 a.m. | 57.2 ppb (53) | 23.6 ppb (22) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 | |
| May 15, 2019, 3 a.m. | 60.4 ppb (57) | 23.6 ppb (22) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| May 15, 2019, 2 a.m. | 50.0 ppb (46) | 15.9 ppb (15) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 15, 2019, 1 a.m. | 58.9 ppb (55) | 20.2 ppb (19) | N/A | 39.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 | |
| May 15, 2019, midnight | 49.7 ppb (46) | 15.2 ppb (14) | N/A | 35.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 14, 2019, 11 p.m. | 57.9 ppb (54) | 19.3 ppb (18) | N/A | 39.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 | |
| May 14, 2019, 10 p.m. | 53.1 ppb (49) | 16.0 ppb (15) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 14, 2019, 9 p.m. | 54.9 ppb (51) | 17.8 ppb (16) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 | |
| May 14, 2019, 8 p.m. | 56.5 ppb (53) | 20.3 ppb (19) | N/A | 36.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 | |
| May 14, 2019, 7 p.m. | 59.3 ppb (56) | 25.2 ppb (23) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 | |
| May 14, 2019, 6 p.m. | 61.9 ppb (58) | 29.8 ppb (28) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 | |
| May 14, 2019, 5 p.m. | 61.0 ppb (57) | 31.1 ppb (29) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| May 14, 2019, 4 p.m. | 76.9 ppb (74) | 42.5 ppb (39) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 74.0 | |
| May 14, 2019, 3 p.m. | 84.8 ppb (83) | 48.0 ppb (44) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 83.0 | |
| May 14, 2019, 2 p.m. | 84.3 ppb (82) | 49.0 ppb (45) | N/A | 35.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 82.0 | |
| May 14, 2019, 1 p.m. | 25.8 ppb (24) | 8.4 ppb (8) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| May 14, 2019, noon | 81.8 ppb (80) | 47.7 ppb (44) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 80.0 | |
| May 14, 2019, 11 a.m. | 69.1 ppb (66) | 36.2 ppb (34) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 66.0 | |
| May 14, 2019, 10 a.m. | 46.7 ppb (43) | 20.9 ppb (19) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| May 14, 2019, 9 a.m. | 36.3 ppb (34) | 14.2 ppb (13) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 | |
| May 14, 2019, 8 a.m. | 37.1 ppb (34) | 13.9 ppb (13) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 | |
| May 14, 2019, 7 a.m. | 34.8 ppb (32) | 11.6 ppb (11) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 | |
| May 14, 2019, 6 a.m. | 46.2 ppb (43) | 18.5 ppb (17) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| May 14, 2019, 5 a.m. | 57.4 ppb (54) | 24.5 ppb (23) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 | |
| May 14, 2019, 4 a.m. | 52.3 ppb (48) | 20.2 ppb (19) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 | |
| May 14, 2019, 3 a.m. | 50.8 ppb (47) | 18.0 ppb (17) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| May 14, 2019, 2 a.m. | 50.2 ppb (46) | 16.3 ppb (15) | N/A | 34.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| May 14, 2019, 1 a.m. | 46.1 ppb (43) | 13.3 ppb (12) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| May 14, 2019, midnight | 45.9 ppb (42) | 16.0 ppb (15) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 | |
| May 13, 2019, 11 p.m. | 65.3 ppb (62) | 28.2 ppb (26) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 | |
| May 13, 2019, 10 p.m. | 58.6 ppb (55) | 25.4 ppb (24) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 | |
| May 13, 2019, 9 p.m. | 46.4 ppb (43) | 20.4 ppb (19) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| May 13, 2019, 8 p.m. | 54.4 ppb (50) | 25.8 ppb (24) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 | |
| May 13, 2019, 7 p.m. | 55.3 ppb (51) | 26.5 ppb (25) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 | |
| May 13, 2019, 6 p.m. | 52.6 ppb (49) | 25.2 ppb (23) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| May 13, 2019, 5 p.m. | 80.3 ppb (78) | 42.3 ppb (39) | N/A | 38.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 78.0 | |
| May 13, 2019, 4 p.m. | 81.2 ppb (79) | 43.8 ppb (41) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 79.0 | |
| May 13, 2019, 3 p.m. | 81.1 ppb (79) | 44.6 ppb (41) | N/A | 37.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 79.0 | |
| May 13, 2019, 2 p.m. | 70.0 ppb (67) | 37.4 ppb (35) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 | |
| May 13, 2019, 1 p.m. | 74.0 ppb (71) | 41.1 ppb (38) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 | |
| May 13, 2019, noon | 69.4 ppb (66) | 37.3 ppb (35) | N/A | 32.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 66.0 | |
| May 13, 2019, 11 a.m. | 21.5 ppb (20) | 8.4 ppb (8) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| May 13, 2019, 10 a.m. | 31.4 ppb (29) | 12.9 ppb (12) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| May 13, 2019, 9 a.m. | 22.4 ppb (21) | 7.2 ppb (7) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 | |
| May 13, 2019, 8 a.m. | 23.5 ppb (22) | 7.4 ppb (7) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 | |
| May 13, 2019, 7 a.m. | 30.1 ppb (28) | 11.6 ppb (11) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 | |
| May 13, 2019, 6 a.m. | 26.6 ppb (25) | 8.6 ppb (8) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| May 13, 2019, 5 a.m. | 18.2 ppb (17) | 5.1 ppb (5) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 | |
| May 13, 2019, 4 a.m. | 19.7 ppb (18) | 5.3 ppb (5) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 | |
| May 13, 2019, 3 a.m. | 16.7 ppb (15) | 4.7 ppb (4) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 | |
| May 13, 2019, 2 a.m. | 25.7 ppb (24) | 8.4 ppb (8) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 |