Ontario (Ballou) CA, US: 34.0309, -117.617403
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 21, 2021, 7 p.m. | 71.0 ppb (70) | 35.9 ppb (34) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 70.0 | |
| April 21, 2021, 6 p.m. | 64.5 ppb (63) | 30.8 ppb (30) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 | |
| April 21, 2021, 5 p.m. | 61.5 ppb (59) | 31.0 ppb (30) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 | |
| April 21, 2021, 4 p.m. | 78.3 ppb (77) | 43.4 ppb (41) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 77.0 | |
| April 21, 2021, 3 p.m. | 81.4 ppb (81) | 44.5 ppb (42) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 81.0 | |
| April 21, 2021, 2 p.m. | 25.9 ppb (25) | 8.6 ppb (9) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| April 21, 2021, 1 p.m. | 24.8 ppb (24) | 9.6 ppb (10) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| April 21, 2021, noon | 7.4 ppb (7) | 1.1 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 | |
| April 21, 2021, 11 a.m. | 9.8 ppb (10) | 2.9 ppb (3) | N/A | 7.0 ppb (7) | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 | |
| April 21, 2021, 10 a.m. | 6.4 ppb (7) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 | |
| April 21, 2021, 9 a.m. | 7.1 ppb (7) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 | |
| April 21, 2021, 8 a.m. | 21.7 ppb (21) | 6.9 ppb (7) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 | |
| April 21, 2021, 7 a.m. | 30.5 ppb (29) | 11.6 ppb (11) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| April 21, 2021, 6 a.m. | 24.5 ppb (24) | 8.0 ppb (8) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| April 21, 2021, 5 a.m. | 32.2 ppb (31) | 11.6 ppb (11) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 | |
| April 21, 2021, 4 a.m. | 35.7 ppb (34) | 15.0 ppb (15) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 | |
| April 21, 2021, 3 a.m. | 40.2 ppb (38) | 17.5 ppb (17) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 | |
| April 21, 2021, 2 a.m. | 42.0 ppb (40) | 16.9 ppb (16) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 | |
| April 21, 2021, 1 a.m. | 37.7 ppb (36) | 15.9 ppb (15) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 | |
| April 21, 2021, midnight | 54.5 ppb (52) | 25.4 ppb (24) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 | |
| April 20, 2021, 11 p.m. | 49.8 ppb (47) | 21.3 ppb (21) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| April 20, 2021, 10 p.m. | 38.8 ppb (37) | 14.1 ppb (14) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 20, 2021, 9 p.m. | 45.2 ppb (43) | 15.3 ppb (15) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| April 20, 2021, 8 p.m. | 50.6 ppb (48) | 18.1 ppb (18) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 | |
| April 20, 2021, 7 p.m. | 58.6 ppb (56) | 22.6 ppb (22) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 | |
| April 20, 2021, 6 p.m. | 73.1 ppb (72) | 36.1 ppb (35) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 72.0 | |
| April 20, 2021, 5 p.m. | 86.0 ppb (86) | 46.9 ppb (45) | N/A | 39.0 ppb (37) | N/A | N/A | N/A | N/A | N/A | N/A | 86.0 | |
| April 20, 2021, 4 p.m. | 54.9 ppb (52) | 26.7 ppb (26) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 | |
| April 20, 2021, 3 p.m. | 104.4 ppb (102) | 68.3 ppb (67) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 102.0 | |
| April 20, 2021, 2 p.m. | 135.6 ppb (108) | 95.1 ppb (95) | N/A | 41.0 ppb (39) | N/A | N/A | N/A | N/A | N/A | N/A | 108.0 | |
| April 20, 2021, 1 p.m. | 128.3 ppb (107) | 92.1 ppb (92) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 107.0 | |
| April 20, 2021, noon | 114.1 ppb (104) | 76.3 ppb (75) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 104.0 | |
| April 20, 2021, 11 a.m. | 79.5 ppb (79) | 43.3 ppb (41) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 79.0 | |
| April 20, 2021, 10 a.m. | 78.3 ppb (77) | 39.5 ppb (38) | N/A | 39.0 ppb (37) | N/A | N/A | N/A | N/A | N/A | N/A | 77.0 | |
| April 20, 2021, 9 a.m. | 67.9 ppb (66) | 28.7 ppb (28) | N/A | 39.0 ppb (37) | N/A | N/A | N/A | N/A | N/A | N/A | 66.0 | |
| April 20, 2021, 8 a.m. | 40.1 ppb (38) | 10.2 ppb (10) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 | |
| April 20, 2021, 7 a.m. | 21.9 ppb (21) | 1.7 ppb (2) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 | |
| April 20, 2021, 6 a.m. | 45.7 ppb (44) | 10.6 ppb (10) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| April 20, 2021, 5 a.m. | 40.0 ppb (38) | 9.2 ppb (9) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 | |
| April 20, 2021, 4 a.m. | 41.0 ppb (39) | 7.8 ppb (8) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 | |
| April 20, 2021, 3 a.m. | 60.0 ppb (58) | 17.5 ppb (17) | N/A | 43.0 ppb (41) | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 | |
| April 20, 2021, 2 a.m. | 54.1 ppb (52) | 17.5 ppb (17) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 | |
| April 20, 2021, 1 a.m. | 53.3 ppb (51) | 17.0 ppb (17) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 | |
| April 20, 2021, midnight | 57.6 ppb (55) | 20.4 ppb (20) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 | |
| April 19, 2021, 11 p.m. | 53.8 ppb (51) | 18.4 ppb (18) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 | |
| April 19, 2021, 10 p.m. | 51.7 ppb (49) | 17.6 ppb (17) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| April 19, 2021, 9 p.m. | 60.1 ppb (58) | 22.5 ppb (22) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 | |
| April 19, 2021, 8 p.m. | 58.9 ppb (57) | 20.9 ppb (20) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| April 19, 2021, 7 p.m. | 44.9 ppb (43) | 15.4 ppb (15) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| April 19, 2021, 6 p.m. | 65.3 ppb (64) | 25.7 ppb (25) | N/A | 40.0 ppb (38) | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 | |
| April 19, 2021, 5 p.m. | 77.0 ppb (76) | 31.7 ppb (30) | N/A | 46.0 ppb (44) | N/A | N/A | N/A | N/A | N/A | N/A | 76.0 | |
| April 19, 2021, 4 p.m. | 126.7 ppb (106) | 70.9 ppb (70) | N/A | 56.0 ppb (54) | N/A | N/A | N/A | N/A | N/A | N/A | 106.0 | |
| April 19, 2021, 3 p.m. | 233.1 ppb (126) | 164.5 ppb (114) | N/A | 69.0 ppb (67) | N/A | N/A | N/A | N/A | N/A | N/A | 126.0 | |
| April 19, 2021, 2 p.m. | 167.2 ppb (114) | 114.5 ppb (104) | N/A | 53.0 ppb (50) | N/A | N/A | N/A | N/A | N/A | N/A | 114.0 | |
| April 19, 2021, 1 p.m. | 192.7 ppb (119) | 139.9 ppb (109) | N/A | 53.0 ppb (50) | N/A | N/A | N/A | N/A | N/A | N/A | 119.0 | |
| April 19, 2021, noon | 72.2 ppb (71) | 32.7 ppb (31) | N/A | 40.0 ppb (38) | N/A | N/A | N/A | N/A | N/A | N/A | 71.0 | |
| April 19, 2021, 11 a.m. | 100.1 ppb (101) | 56.0 ppb (54) | N/A | 44.0 ppb (42) | N/A | N/A | N/A | N/A | N/A | N/A | 101.0 | |
| April 19, 2021, 10 a.m. | 45.9 ppb (44) | 7.7 ppb (8) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| April 19, 2021, 9 a.m. | 43.2 ppb (41) | 4.2 ppb (4) | N/A | 39.0 ppb (37) | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 | |
| April 19, 2021, 8 a.m. | 62.5 ppb (61) | 19.9 ppb (19) | N/A | 43.0 ppb (41) | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 | |
| April 19, 2021, 7 a.m. | 46.8 ppb (45) | 9.0 ppb (9) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| April 19, 2021, 6 a.m. | 29.7 ppb (29) | 3.1 ppb (3) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| April 19, 2021, 5 a.m. | 49.0 ppb (47) | 11.4 ppb (11) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| April 19, 2021, 4 a.m. | 22.5 ppb (22) | 2.6 ppb (3) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 | |
| April 19, 2021, 3 a.m. | 38.0 ppb (36) | 10.0 ppb (10) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 | |
| April 19, 2021, 2 a.m. | 32.6 ppb (31) | 7.2 ppb (7) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 | |
| April 19, 2021, 1 a.m. | 28.8 ppb (28) | 7.3 ppb (7) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 | |
| April 19, 2021, midnight | 14.0 ppb (14) | 2.9 ppb (3) | N/A | 11.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 | |
| April 18, 2021, 11 p.m. | 21.2 ppb (20) | 5.9 ppb (6) | N/A | 15.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 | |
| April 18, 2021, 10 p.m. | 14.0 ppb (14) | 4.1 ppb (4) | N/A | 10.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 | |
| April 18, 2021, 9 p.m. | 5.3 ppb (5) | 1.4 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 | |
| April 18, 2021, 8 p.m. | 3.5 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 | |
| April 18, 2021, 7 p.m. | 1.6 ppb (2) | 0.2 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 | |
| April 18, 2021, 6 p.m. | 2.3 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 | |
| April 18, 2021, 5 p.m. | 2.2 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 | |
| April 18, 2021, 4 p.m. | 2.9 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 | |
| April 18, 2021, 3 p.m. | 5.4 ppb (6) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 | |
| April 18, 2021, 2 p.m. | 23.1 ppb (22) | 6.7 ppb (7) | N/A | 16.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 | |
| April 18, 2021, 1 p.m. | 31.1 ppb (30) | 9.1 ppb (9) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 | |
| April 18, 2021, noon | 28.5 ppb (27) | 9.7 ppb (10) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| April 18, 2021, 11 a.m. | 55.5 ppb (53) | 20.5 ppb (20) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 | |
| April 18, 2021, 10 a.m. | 74.7 ppb (74) | 33.4 ppb (32) | N/A | 42.0 ppb (40) | N/A | N/A | N/A | N/A | N/A | N/A | 74.0 | |
| April 18, 2021, 9 a.m. | 47.6 ppb (45) | 8.0 ppb (8) | N/A | 40.0 ppb (38) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| April 18, 2021, 8 a.m. | 33.1 ppb (32) | 5.7 ppb (6) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 | |
| April 18, 2021, 7 a.m. | 28.0 ppb (27) | 3.0 ppb (3) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| April 18, 2021, 6 a.m. | 39.2 ppb (37) | 9.6 ppb (10) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 18, 2021, 5 a.m. | 38.2 ppb (37) | 10.7 ppb (11) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 18, 2021, 4 a.m. | 33.5 ppb (32) | 6.7 ppb (7) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 | |
| April 18, 2021, 3 a.m. | 31.5 ppb (30) | 5.6 ppb (6) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 | |
| April 18, 2021, 2 a.m. | 32.3 ppb (31) | 7.0 ppb (7) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 | |
| April 18, 2021, 1 a.m. | 30.2 ppb (29) | 5.4 ppb (6) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| April 18, 2021, midnight | 24.5 ppb (24) | 4.3 ppb (5) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| April 17, 2021, 11 p.m. | 30.7 ppb (29) | 7.4 ppb (7) | N/A | 23.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| April 17, 2021, 10 p.m. | 25.2 ppb (24) | 5.3 ppb (5) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| April 17, 2021, 9 p.m. | 30.3 ppb (29) | 8.7 ppb (9) | N/A | 22.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| April 17, 2021, 8 p.m. | 24.5 ppb (24) | 7.6 ppb (8) | N/A | 17.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| April 17, 2021, 7 p.m. | 29.6 ppb (28) | 10.8 ppb (11) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 | |
| April 17, 2021, 6 p.m. | 28.1 ppb (27) | 10.1 ppb (10) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| April 17, 2021, 5 p.m. | 30.4 ppb (29) | 12.8 ppb (13) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 | |
| April 17, 2021, 4 p.m. | 37.2 ppb (36) | 16.5 ppb (16) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 | |
| April 17, 2021, 3 p.m. | 42.7 ppb (41) | 18.3 ppb (18) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 | |
| April 17, 2021, 2 p.m. | 54.7 ppb (52) | 25.2 ppb (24) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 | |
| April 17, 2021, 1 p.m. | 36.2 ppb (35) | 15.3 ppb (15) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 | |
| April 17, 2021, noon | 12.0 ppb (12) | 3.4 ppb (4) | N/A | 9.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 | |
| April 17, 2021, 11 a.m. | 28.3 ppb (27) | 8.4 ppb (8) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| April 17, 2021, 10 a.m. | 42.3 ppb (40) | 17.8 ppb (17) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 | |
| April 17, 2021, 9 a.m. | 38.7 ppb (37) | 13.5 ppb (13) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 17, 2021, 8 a.m. | 45.1 ppb (43) | 14.0 ppb (14) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| April 17, 2021, 7 a.m. | 22.2 ppb (21) | 3.8 ppb (4) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 | |
| April 17, 2021, 6 a.m. | 46.0 ppb (44) | 15.1 ppb (15) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| April 17, 2021, 5 a.m. | 49.6 ppb (47) | 16.5 ppb (16) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| April 17, 2021, 4 a.m. | 56.4 ppb (54) | 21.0 ppb (20) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 | |
| April 17, 2021, 3 a.m. | 58.9 ppb (57) | 21.1 ppb (20) | N/A | 38.0 ppb (36) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| April 17, 2021, 2 a.m. | 65.5 ppb (64) | 29.3 ppb (28) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 64.0 | |
| April 17, 2021, 1 a.m. | 44.9 ppb (43) | 15.5 ppb (15) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| April 17, 2021, midnight | 49.9 ppb (48) | 17.4 ppb (17) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 | |
| April 16, 2021, 11 p.m. | 50.5 ppb (48) | 18.9 ppb (18) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 | |
| April 16, 2021, 10 p.m. | 52.5 ppb (50) | 20.9 ppb (20) | N/A | 32.0 ppb (31) | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 | |
| April 16, 2021, 9 p.m. | 51.9 ppb (49) | 18.2 ppb (18) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 | |
| April 16, 2021, 8 p.m. | 59.3 ppb (57) | 22.7 ppb (22) | N/A | 37.0 ppb (35) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| April 16, 2021, 7 p.m. | 57.5 ppb (55) | 22.0 ppb (21) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 | |
| April 16, 2021, 6 p.m. | 54.2 ppb (52) | 21.7 ppb (21) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 | |
| April 16, 2021, 5 p.m. | 79.1 ppb (78) | 36.4 ppb (35) | N/A | 43.0 ppb (41) | N/A | N/A | N/A | N/A | N/A | N/A | 78.0 | |
| April 16, 2021, 4 p.m. | 101.8 ppb (102) | 58.9 ppb (57) | N/A | 43.0 ppb (41) | N/A | N/A | N/A | N/A | N/A | N/A | 102.0 | |
| April 16, 2021, 3 p.m. | 128.7 ppb (107) | 84.6 ppb (84) | N/A | 45.0 ppb (43) | N/A | N/A | N/A | N/A | N/A | N/A | 107.0 | |
| April 16, 2021, 2 p.m. | 77.1 ppb (76) | 44.7 ppb (43) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 76.0 | |
| April 16, 2021, 1 p.m. | 81.3 ppb (81) | 50.2 ppb (48) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 81.0 | |
| April 16, 2021, noon | 110.0 ppb (103) | 75.2 ppb (74) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 103.0 | |
| April 16, 2021, 11 a.m. | 83.5 ppb (83) | 48.9 ppb (47) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 83.0 | |
| April 16, 2021, 10 a.m. | 39.4 ppb (38) | 11.8 ppb (12) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 | |
| April 16, 2021, 9 a.m. | 38.3 ppb (37) | 8.3 ppb (8) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 16, 2021, 8 a.m. | 52.0 ppb (50) | 18.8 ppb (18) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 | |
| April 16, 2021, 7 a.m. | 27.6 ppb (27) | 7.5 ppb (8) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 | |
| April 16, 2021, 6 a.m. | 14.7 ppb (14) | 0.3 ppb (1) | N/A | 14.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 | |
| April 16, 2021, 5 a.m. | 26.2 ppb (25) | 5.5 ppb (6) | N/A | 21.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| April 16, 2021, 4 a.m. | 48.8 ppb (47) | 18.8 ppb (18) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| April 16, 2021, 3 a.m. | 53.7 ppb (51) | 18.9 ppb (18) | N/A | 35.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 | |
| April 16, 2021, 2 a.m. | 56.7 ppb (54) | 21.3 ppb (21) | N/A | 36.0 ppb (34) | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 | |
| April 16, 2021, 1 a.m. | 50.2 ppb (48) | 17.8 ppb (17) | N/A | 33.0 ppb (32) | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 | |
| April 16, 2021, midnight | 45.6 ppb (44) | 17.4 ppb (17) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| April 15, 2021, 11 p.m. | 49.5 ppb (47) | 19.3 ppb (19) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 | |
| April 15, 2021, 10 p.m. | 47.3 ppb (45) | 18.1 ppb (18) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| April 15, 2021, 9 p.m. | 48.2 ppb (46) | 19.0 ppb (18) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| April 15, 2021, 8 p.m. | 47.8 ppb (46) | 19.2 ppb (19) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| April 15, 2021, 7 p.m. | 46.7 ppb (45) | 19.8 ppb (19) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| April 15, 2021, 6 p.m. | 56.0 ppb (54) | 26.8 ppb (26) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 | |
| April 15, 2021, 5 p.m. | 53.3 ppb (51) | 25.4 ppb (24) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 | |
| April 15, 2021, 4 p.m. | 58.9 ppb (57) | 28.5 ppb (27) | N/A | 31.0 ppb (30) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 | |
| April 15, 2021, 3 p.m. | 87.2 ppb (87) | 48.7 ppb (46) | N/A | 39.0 ppb (37) | N/A | N/A | N/A | N/A | N/A | N/A | 87.0 | |
| April 15, 2021, 2 p.m. | 102.8 ppb (102) | 60.1 ppb (58) | N/A | 43.0 ppb (41) | N/A | N/A | N/A | N/A | N/A | N/A | 102.0 | |
| April 15, 2021, 1 p.m. | 115.7 ppb (104) | 73.0 ppb (72) | N/A | 43.0 ppb (41) | N/A | N/A | N/A | N/A | N/A | N/A | 104.0 | |
| April 15, 2021, noon | 77.0 ppb (76) | 37.0 ppb (35) | N/A | 40.0 ppb (38) | N/A | N/A | N/A | N/A | N/A | N/A | 76.0 | |
| April 15, 2021, 11 a.m. | 47.0 ppb (45) | 17.2 ppb (17) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 45.0 | |
| April 15, 2021, 10 a.m. | 38.8 ppb (37) | 14.0 ppb (14) | N/A | 25.0 ppb (24) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 15, 2021, 9 a.m. | 43.4 ppb (41) | 13.1 ppb (13) | N/A | 30.0 ppb (29) | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 | |
| April 15, 2021, 8 a.m. | 24.8 ppb (24) | 6.8 ppb (7) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 | |
| April 15, 2021, 7 a.m. | 26.1 ppb (25) | 6.8 ppb (7) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 | |
| April 15, 2021, 6 a.m. | 39.0 ppb (37) | 12.5 ppb (12) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 | |
| April 15, 2021, 5 a.m. | 36.7 ppb (35) | 11.1 ppb (11) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 | |
| April 15, 2021, 4 a.m. | 44.1 ppb (42) | 16.1 ppb (16) | N/A | 28.0 ppb (27) | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 | |
| April 15, 2021, 3 a.m. | 41.7 ppb (40) | 14.6 ppb (14) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 | |
| April 15, 2021, 2 a.m. | 39.5 ppb (38) | 15.9 ppb (15) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 | |
| April 15, 2021, 1 a.m. | 32.9 ppb (32) | 13.3 ppb (13) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 | |
| April 15, 2021, midnight | 44.8 ppb (43) | 21.2 ppb (20) | N/A | 24.0 ppb (23) | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 | |
| April 14, 2021, 11 p.m. | 46.2 ppb (44) | 19.2 ppb (19) | N/A | 27.0 ppb (26) | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 | |
| April 14, 2021, 10 p.m. | 47.8 ppb (46) | 18.8 ppb (18) | N/A | 29.0 ppb (28) | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 | |
| April 14, 2021, 9 p.m. | 43.9 ppb (42) | 17.6 ppb (17) | N/A | 26.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 | |
| April 14, 2021, 8 p.m. | 59.2 ppb (57) | 25.6 ppb (25) | N/A | 34.0 ppb (33) | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 |