Visalia (Downtown) CA, US: 36.33252, -119.29095
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 22, 2021, 8 a.m. | 13.3 ppb (13) | 1.1 ppb (2) | N/A | 12.0 ppb (12) | N/A | N/A | 18.0 ppb (17) | N/A | 84.9 μg/m3 (66) | 22.0 μg/m3 (72) | 72.0 | |
| April 22, 2021, 7 a.m. | 11.4 ppb (11) | 0.9 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 24.0 ppb (23) | N/A | 51.6 μg/m3 (48) | 20.0 μg/m3 (68) | 68.0 | |
| April 22, 2021, 6 a.m. | 11.7 ppb (12) | 0.8 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 28.0 ppb (26) | N/A | 62.3 μg/m3 (55) | 17.0 μg/m3 (62) | 62.0 | |
| April 22, 2021, 5 a.m. | 13.0 ppb (13) | 0.8 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | 28.0 ppb (26) | N/A | 59.7 μg/m3 (54) | 24.0 μg/m3 (77) | 77.0 | |
| April 22, 2021, 4 a.m. | 12.0 ppb (12) | 0.6 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 35.0 ppb (33) | N/A | 48.2 μg/m3 (45) | 16.0 μg/m3 (60) | 60.0 | |
| April 22, 2021, 3 a.m. | 6.5 ppb (7) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 43.0 ppb (40) | N/A | 47.8 μg/m3 (45) | 16.0 μg/m3 (60) | 60.0 | |
| April 22, 2021, 2 a.m. | 4.7 ppb (5) | 0.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 47.0 ppb (44) | N/A | 44.8 μg/m3 (42) | 17.0 μg/m3 (62) | 62.0 | |
| April 22, 2021, 1 a.m. | 3.6 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 48.0 ppb (45) | N/A | 47.7 μg/m3 (45) | 14.0 μg/m3 (55) | 55.0 | |
| April 22, 2021, midnight | 3.4 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 46.0 ppb (43) | N/A | 48.7 μg/m3 (46) | 12.0 μg/m3 (50) | 50.0 | |
| April 21, 2021, 11 p.m. | 3.3 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 45.0 ppb (42) | N/A | 48.3 μg/m3 (45) | 9.0 μg/m3 (38) | 45.0 | |
| April 21, 2021, 10 p.m. | 3.5 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 44.0 ppb (41) | N/A | 55.4 μg/m3 (52) | 13.0 μg/m3 (53) | 53.0 | |
| April 21, 2021, 9 p.m. | 3.8 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 43.0 ppb (40) | N/A | 41.1 μg/m3 (39) | 17.0 μg/m3 (62) | 62.0 | |
| April 21, 2021, 8 p.m. | 4.0 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (38) | N/A | 40.5 μg/m3 (38) | 13.0 μg/m3 (53) | 53.0 | |
| April 21, 2021, 7 p.m. | 3.8 ppb (4) | 1.1 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 37.0 ppb (35) | N/A | 34.6 μg/m3 (33) | 11.0 μg/m3 (46) | 46.0 | |
| April 21, 2021, 6 p.m. | 4.0 ppb (4) | 1.4 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 33.0 ppb (31) | N/A | 36.2 μg/m3 (34) | 10.0 μg/m3 (42) | 42.0 | |
| April 21, 2021, 5 p.m. | 4.1 ppb (4) | 1.6 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 29.0 ppb (27) | N/A | 38.6 μg/m3 (36) | 7.0 μg/m3 (30) | 36.0 | |
| April 21, 2021, 4 p.m. | 4.9 ppb (5) | 2.0 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 24.0 ppb (23) | N/A | 29.7 μg/m3 (28) | 5.0 μg/m3 (21) | 28.0 | |
| April 21, 2021, 3 p.m. | 6.1 ppb (6) | 2.4 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | 21.0 ppb (20) | N/A | 40.8 μg/m3 (38) | 7.0 μg/m3 (30) | 38.0 | |
| April 21, 2021, 2 p.m. | 7.8 ppb (8) | 2.3 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | 16.0 ppb (15) | N/A | 32.0 μg/m3 (30) | 7.0 μg/m3 (30) | 30.0 | |
| April 21, 2021, 1 p.m. | 9.8 ppb (10) | 1.6 ppb (2) | N/A | 8.0 ppb (8) | N/A | N/A | 10.0 ppb (10) | N/A | 30.8 μg/m3 (29) | 6.0 μg/m3 (25) | 29.0 | |
| April 21, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 96.2 μg/m3 (72) | 9.0 μg/m3 (38) | 72.0 | |
| April 21, 2021, 11 a.m. | 7.0 ppb (7) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 20.0 ppb (19) | N/A | 49.6 μg/m3 (46) | 12.0 μg/m3 (50) | 50.0 | |
| April 21, 2021, 10 a.m. | 3.5 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 23.0 ppb (22) | N/A | 52.0 μg/m3 (49) | 7.0 μg/m3 (30) | 49.0 | |
| April 21, 2021, 9 a.m. | 2.5 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 25.0 ppb (24) | N/A | 35.3 μg/m3 (33) | 7.0 μg/m3 (30) | 33.0 | |
| April 21, 2021, 8 a.m. | 2.7 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 25.0 ppb (24) | N/A | 44.2 μg/m3 (41) | 6.0 μg/m3 (25) | 41.0 | |
| April 21, 2021, 7 a.m. | 2.8 ppb (3) | 0.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 26.0 ppb (25) | N/A | 55.1 μg/m3 (52) | 6.0 μg/m3 (25) | 52.0 | |
| April 21, 2021, 6 a.m. | 3.0 ppb (3) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 27.0 ppb (25) | N/A | 48.5 μg/m3 (45) | 7.0 μg/m3 (30) | 45.0 | |
| April 21, 2021, 5 a.m. | 3.0 ppb (3) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 31.0 ppb (29) | N/A | 119.8 μg/m3 (84) | 16.0 μg/m3 (60) | 84.0 | |
| April 21, 2021, 4 a.m. | 3.7 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 34.0 ppb (32) | N/A | 246.3 μg/m3 (147) | 17.0 μg/m3 (62) | 147.0 | |
| April 21, 2021, 3 a.m. | 6.9 ppb (7) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 35.0 ppb (33) | N/A | 81.1 μg/m3 (64) | 10.0 μg/m3 (42) | 64.0 | |
| April 21, 2021, 2 a.m. | 6.3 ppb (6) | 0.4 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 46.0 ppb (43) | N/A | 42.5 μg/m3 (40) | 9.0 μg/m3 (38) | 43.0 | |
| April 21, 2021, 1 a.m. | 3.3 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | 35.4 μg/m3 (33) | 9.0 μg/m3 (38) | 48.0 | |
| April 21, 2021, midnight | 3.5 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | N/A | 37.8 μg/m3 (35) | 6.0 μg/m3 (25) | 49.0 | |
| April 20, 2021, 11 p.m. | 3.7 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | 28.1 μg/m3 (27) | 6.0 μg/m3 (25) | 48.0 | |
| April 20, 2021, 10 p.m. | 5.4 ppb (6) | 1.4 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 47.0 ppb (44) | N/A | 33.2 μg/m3 (31) | 4.0 μg/m3 (17) | 44.0 | |
| April 20, 2021, 9 p.m. | 3.6 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (44) | N/A | 38.1 μg/m3 (36) | 7.0 μg/m3 (30) | 44.0 | |
| April 20, 2021, 8 p.m. | 4.1 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (44) | N/A | 35.3 μg/m3 (33) | 7.0 μg/m3 (30) | 44.0 | |
| April 20, 2021, 7 p.m. | 4.7 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 44.0 ppb (41) | N/A | 35.8 μg/m3 (34) | 7.0 μg/m3 (30) | 41.0 | |
| April 20, 2021, 6 p.m. | 6.8 ppb (7) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 40.0 ppb (38) | N/A | 40.0 μg/m3 (38) | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 5 p.m. | 10.0 ppb (10) | 2.9 ppb (3) | N/A | 7.0 ppb (7) | N/A | N/A | 32.0 ppb (30) | N/A | 48.0 μg/m3 (45) | 10.0 μg/m3 (42) | 45.0 | |
| April 20, 2021, 4 p.m. | 20.1 ppb (19) | 7.3 ppb (7) | N/A | 13.0 ppb (13) | N/A | N/A | 21.0 ppb (20) | N/A | 56.3 μg/m3 (52) | 19.0 μg/m3 (66) | 66.0 | |
| April 20, 2021, 3 p.m. | 22.6 ppb (22) | 9.1 ppb (9) | N/A | 14.0 ppb (14) | N/A | N/A | 15.0 ppb (14) | N/A | 59.2 μg/m3 (54) | 20.0 μg/m3 (68) | 68.0 | |
| April 20, 2021, 2 p.m. | 26.9 ppb (26) | 11.8 ppb (12) | N/A | 15.0 ppb (15) | N/A | N/A | 7.0 ppb (7) | N/A | 66.5 μg/m3 (57) | 14.0 μg/m3 (55) | 57.0 | |
| April 20, 2021, 1 p.m. | 24.2 ppb (23) | 6.8 ppb (7) | N/A | 17.0 ppb (17) | N/A | N/A | 4.0 ppb (4) | N/A | 51.5 μg/m3 (48) | 14.0 μg/m3 (55) | 55.0 | |
| April 20, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 μg/m3 (36) | 10.0 μg/m3 (42) | 42.0 | |
| April 20, 2021, 11 a.m. | 7.1 ppb (7) | 0.9 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 21.0 ppb (20) | N/A | 38.6 μg/m3 (36) | 11.0 μg/m3 (46) | 46.0 | |
| April 20, 2021, 10 a.m. | 7.7 ppb (8) | 0.9 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 21.0 ppb (20) | N/A | 42.2 μg/m3 (40) | 14.0 μg/m3 (55) | 55.0 | |
| April 20, 2021, 9 a.m. | 6.8 ppb (7) | 0.9 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 24.0 ppb (23) | N/A | 38.4 μg/m3 (36) | 14.0 μg/m3 (55) | 55.0 | |
| April 20, 2021, 8 a.m. | 7.4 ppb (7) | 0.9 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 26.0 ppb (25) | N/A | 47.4 μg/m3 (44) | 11.0 μg/m3 (46) | 46.0 | |
| April 20, 2021, 7 a.m. | 9.0 ppb (9) | 0.9 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 28.0 ppb (26) | N/A | 45.5 μg/m3 (43) | 10.0 μg/m3 (42) | 43.0 | |
| April 20, 2021, 6 a.m. | 9.7 ppb (10) | 1.0 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 29.0 ppb (27) | N/A | 52.7 μg/m3 (49) | 17.0 μg/m3 (62) | 62.0 | |
| April 20, 2021, 5 a.m. | 11.7 ppb (12) | 1.0 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 29.0 ppb (27) | N/A | 59.1 μg/m3 (54) | 17.0 μg/m3 (62) | 62.0 | |
| April 20, 2021, 4 a.m. | 9.0 ppb (9) | 0.7 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 36.0 ppb (34) | N/A | 52.2 μg/m3 (49) | 7.0 μg/m3 (30) | 49.0 | |
| April 20, 2021, 3 a.m. | 7.8 ppb (8) | 0.6 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 37.0 ppb (35) | N/A | 54.8 μg/m3 (51) | 8.0 μg/m3 (34) | 51.0 | |
| April 20, 2021, 2 a.m. | 5.8 ppb (6) | 0.5 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (41) | N/A | 47.4 μg/m3 (44) | 9.0 μg/m3 (38) | 44.0 | |
| April 20, 2021, 1 a.m. | 4.1 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 51.0 ppb (48) | N/A | 33.8 μg/m3 (32) | 7.0 μg/m3 (30) | 48.0 | |
| April 20, 2021, midnight | 3.8 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 50.0 ppb (47) | N/A | 30.2 μg/m3 (28) | 4.0 μg/m3 (17) | 47.0 | |
| April 19, 2021, 11 p.m. | 3.0 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 52.0 ppb (49) | N/A | 40.9 μg/m3 (38) | 6.0 μg/m3 (25) | 49.0 | |
| April 19, 2021, 10 p.m. | 3.1 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | N/A | 37.8 μg/m3 (35) | 8.0 μg/m3 (34) | 49.0 | |
| April 19, 2021, 9 p.m. | 3.3 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | N/A | 33.1 μg/m3 (31) | 8.0 μg/m3 (34) | 49.0 | |
| April 19, 2021, 8 p.m. | 4.2 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 50.0 ppb (47) | N/A | 32.6 μg/m3 (31) | 10.0 μg/m3 (42) | 47.0 | |
| April 19, 2021, 7 p.m. | 6.5 ppb (7) | 1.1 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 47.0 ppb (44) | N/A | 38.4 μg/m3 (36) | 13.0 μg/m3 (53) | 53.0 | |
| April 19, 2021, 6 p.m. | 6.2 ppb (6) | 1.2 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 46.0 ppb (43) | N/A | 39.7 μg/m3 (37) | 10.0 μg/m3 (42) | 43.0 | |
| April 19, 2021, 5 p.m. | 6.3 ppb (6) | 1.4 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 40.0 ppb (38) | N/A | 33.6 μg/m3 (32) | 10.0 μg/m3 (42) | 42.0 | |
| April 19, 2021, 4 p.m. | 8.4 ppb (8) | 2.1 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 33.0 ppb (31) | N/A | 39.7 μg/m3 (37) | 12.0 μg/m3 (50) | 50.0 | |
| April 19, 2021, 3 p.m. | 12.4 ppb (12) | 3.4 ppb (4) | N/A | 9.0 ppb (9) | N/A | N/A | 26.0 ppb (25) | N/A | 35.8 μg/m3 (34) | 12.0 μg/m3 (50) | 50.0 | |
| April 19, 2021, 2 p.m. | 12.7 ppb (12) | 2.7 ppb (3) | N/A | 10.0 ppb (10) | N/A | N/A | 22.0 ppb (21) | N/A | 49.4 μg/m3 (46) | 18.0 μg/m3 (64) | 64.0 | |
| April 19, 2021, 1 p.m. | 20.8 ppb (20) | 3.9 ppb (4) | N/A | 17.0 ppb (17) | N/A | N/A | 12.0 ppb (12) | N/A | 66.2 μg/m3 (57) | 22.0 μg/m3 (72) | 72.0 | |
| April 19, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 95.3 μg/m3 (71) | 23.0 μg/m3 (74) | 74.0 | |
| April 19, 2021, 11 a.m. | 8.1 ppb (8) | 0.9 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 19.0 ppb (18) | N/A | 45.7 μg/m3 (43) | 24.0 μg/m3 (77) | 77.0 | |
| April 19, 2021, 10 a.m. | 7.3 ppb (7) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 18.0 ppb (17) | N/A | 43.5 μg/m3 (41) | 21.0 μg/m3 (70) | 70.0 | |
| April 19, 2021, 9 a.m. | 11.0 ppb (11) | 1.3 ppb (2) | N/A | 10.0 ppb (10) | N/A | N/A | 13.0 ppb (13) | N/A | 42.1 μg/m3 (39) | 21.0 μg/m3 (70) | 70.0 | |
| April 19, 2021, 8 a.m. | 12.3 ppb (12) | 1.1 ppb (2) | N/A | 11.0 ppb (11) | N/A | N/A | 16.0 ppb (15) | N/A | 50.9 μg/m3 (48) | 14.0 μg/m3 (55) | 55.0 | |
| April 19, 2021, 7 a.m. | 18.1 ppb (18) | 1.1 ppb (2) | N/A | 17.0 ppb (17) | N/A | N/A | 17.0 ppb (16) | N/A | 58.2 μg/m3 (53) | 13.0 μg/m3 (53) | 53.0 | |
| April 19, 2021, 6 a.m. | 21.0 ppb (20) | 1.3 ppb (2) | N/A | 20.0 ppb (19) | N/A | N/A | 14.0 ppb (13) | N/A | 97.8 μg/m3 (73) | 18.0 μg/m3 (64) | 73.0 | |
| April 19, 2021, 5 a.m. | 13.8 ppb (14) | 0.7 ppb (1) | N/A | 13.0 ppb (13) | N/A | N/A | 26.0 ppb (25) | N/A | 30.4 μg/m3 (29) | 5.0 μg/m3 (21) | 29.0 | |
| April 19, 2021, 4 a.m. | 10.7 ppb (11) | 0.8 ppb (1) | N/A | 10.0 ppb (10) | N/A | N/A | 35.0 ppb (33) | N/A | 38.1 μg/m3 (36) | 7.0 μg/m3 (30) | 36.0 | |
| April 19, 2021, 3 a.m. | 10.7 ppb (11) | 0.5 ppb (1) | N/A | 10.0 ppb (10) | N/A | N/A | 35.0 ppb (33) | N/A | 32.2 μg/m3 (30) | 9.0 μg/m3 (38) | 38.0 | |
| April 19, 2021, 2 a.m. | 5.4 ppb (6) | 0.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (41) | N/A | 40.4 μg/m3 (38) | 3.0 μg/m3 (13) | 41.0 | |
| April 19, 2021, 1 a.m. | 2.8 ppb (3) | 0.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 51.0 ppb (48) | N/A | 29.2 μg/m3 (28) | 6.0 μg/m3 (25) | 48.0 | |
| April 19, 2021, midnight | 2.8 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 58.0 ppb (61) | N/A | 20.4 μg/m3 (19) | 11.0 μg/m3 (46) | 61.0 | |
| April 18, 2021, 11 p.m. | 2.8 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 55.0 ppb (51) | N/A | 32.4 μg/m3 (30) | 12.0 μg/m3 (50) | 51.0 | |
| April 18, 2021, 10 p.m. | 3.0 ppb (3) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 53.0 ppb (50) | N/A | 34.3 μg/m3 (32) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 9 p.m. | 3.5 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | 27.6 μg/m3 (26) | 5.0 μg/m3 (21) | 48.0 | |
| April 18, 2021, 8 p.m. | 3.6 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (46) | N/A | 29.2 μg/m3 (28) | 8.0 μg/m3 (34) | 46.0 | |
| April 18, 2021, 7 p.m. | 5.1 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 46.0 ppb (43) | N/A | 29.5 μg/m3 (28) | 10.0 μg/m3 (42) | 43.0 | |
| April 18, 2021, 6 p.m. | 7.1 ppb (7) | 1.5 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 41.0 ppb (38) | N/A | 44.1 μg/m3 (41) | 11.0 μg/m3 (46) | 46.0 | |
| April 18, 2021, 5 p.m. | 6.4 ppb (7) | 1.7 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 37.0 ppb (35) | N/A | 43.3 μg/m3 (41) | 13.0 μg/m3 (53) | 53.0 | |
| April 18, 2021, 4 p.m. | 5.0 ppb (5) | 1.5 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (31) | N/A | 38.9 μg/m3 (37) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 3 p.m. | 4.8 ppb (5) | 1.4 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 29.0 ppb (27) | N/A | 28.8 μg/m3 (27) | 9.0 μg/m3 (38) | 38.0 | |
| April 18, 2021, 2 p.m. | 6.8 ppb (7) | 1.6 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 21.0 ppb (20) | N/A | 29.6 μg/m3 (28) | 16.0 μg/m3 (60) | 60.0 | |
| April 18, 2021, 1 p.m. | 7.4 ppb (7) | 1.2 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 15.0 ppb (14) | N/A | 47.4 μg/m3 (44) | 19.0 μg/m3 (66) | 66.0 | |
| April 18, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 29.9 μg/m3 (28) | 16.0 μg/m3 (60) | 60.0 | |
| April 18, 2021, 11 a.m. | 6.7 ppb (7) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 16.0 ppb (15) | N/A | 32.7 μg/m3 (31) | 13.0 μg/m3 (53) | 53.0 | |
| April 18, 2021, 10 a.m. | 8.9 ppb (9) | 1.0 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 17.0 ppb (16) | N/A | 38.6 μg/m3 (36) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 9 a.m. | 12.7 ppb (12) | 1.1 ppb (2) | N/A | 12.0 ppb (12) | N/A | N/A | 16.0 ppb (15) | N/A | 35.9 μg/m3 (34) | 18.0 μg/m3 (64) | 64.0 | |
| April 18, 2021, 8 a.m. | 5.9 ppb (6) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 24.0 ppb (23) | N/A | 53.1 μg/m3 (50) | 13.0 μg/m3 (53) | 53.0 | |
| April 18, 2021, 7 a.m. | 5.7 ppb (6) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 26.0 ppb (25) | N/A | 28.3 μg/m3 (27) | 15.0 μg/m3 (58) | 58.0 | |
| April 18, 2021, 6 a.m. | 3.9 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (30) | N/A | 28.5 μg/m3 (27) | 12.0 μg/m3 (50) | 50.0 | |
| April 18, 2021, 5 a.m. | 11.3 ppb (11) | 0.9 ppb (1) | N/A | 10.0 ppb (10) | N/A | N/A | 26.0 ppb (25) | N/A | 52.9 μg/m3 (49) | 20.0 μg/m3 (68) | 68.0 | |
| April 18, 2021, 4 a.m. | 9.8 ppb (10) | 0.7 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 34.0 ppb (32) | N/A | 60.8 μg/m3 (54) | 15.0 μg/m3 (58) | 58.0 | |
| April 18, 2021, 3 a.m. | 11.7 ppb (12) | 0.7 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 34.0 ppb (32) | N/A | 65.1 μg/m3 (56) | 16.0 μg/m3 (60) | 60.0 | |
| April 18, 2021, 2 a.m. | 5.2 ppb (5) | 0.3 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (41) | N/A | 32.5 μg/m3 (31) | 7.0 μg/m3 (30) | 41.0 | |
| April 18, 2021, 1 a.m. | 3.3 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 48.0 ppb (45) | N/A | 31.5 μg/m3 (30) | 10.0 μg/m3 (42) | 45.0 | |
| April 18, 2021, midnight | 2.6 ppb (3) | 0.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 48.0 ppb (45) | N/A | 31.1 μg/m3 (29) | 6.0 μg/m3 (25) | 45.0 | |
| April 17, 2021, 11 p.m. | 2.9 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 47.0 ppb (44) | N/A | 35.6 μg/m3 (33) | 8.0 μg/m3 (34) | 44.0 | |
| April 17, 2021, 10 p.m. | 3.0 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (43) | N/A | 41.3 μg/m3 (39) | 11.0 μg/m3 (46) | 46.0 | |
| April 17, 2021, 9 p.m. | 2.9 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 44.0 ppb (41) | N/A | 41.7 μg/m3 (39) | 9.0 μg/m3 (38) | 41.0 | |
| April 17, 2021, 8 p.m. | 3.3 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (39) | N/A | 46.0 μg/m3 (43) | 6.0 μg/m3 (25) | 43.0 | |
| April 17, 2021, 7 p.m. | 3.4 ppb (4) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (38) | N/A | 37.8 μg/m3 (35) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 6 p.m. | 5.0 ppb (5) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (35) | N/A | 41.2 μg/m3 (39) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 5 p.m. | 7.7 ppb (8) | 2.1 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 33.0 ppb (31) | N/A | 42.9 μg/m3 (40) | 10.0 μg/m3 (42) | 42.0 | |
| April 17, 2021, 4 p.m. | 12.1 ppb (12) | 3.5 ppb (4) | N/A | 9.0 ppb (9) | N/A | N/A | 27.0 ppb (25) | N/A | 41.7 μg/m3 (39) | 18.0 μg/m3 (64) | 64.0 | |
| April 17, 2021, 3 p.m. | 13.8 ppb (14) | 4.0 ppb (4) | N/A | 10.0 ppb (10) | N/A | N/A | 22.0 ppb (21) | N/A | 44.6 μg/m3 (42) | 20.0 μg/m3 (68) | 68.0 | |
| April 17, 2021, 2 p.m. | 15.8 ppb (15) | 4.5 ppb (5) | N/A | 11.0 ppb (11) | N/A | N/A | 13.0 ppb (13) | N/A | 45.6 μg/m3 (43) | 12.0 μg/m3 (50) | 50.0 | |
| April 17, 2021, 1 p.m. | 12.1 ppb (12) | 1.8 ppb (2) | N/A | 10.0 ppb (10) | N/A | N/A | 13.0 ppb (13) | N/A | 34.1 μg/m3 (32) | 11.0 μg/m3 (46) | 46.0 | |
| April 17, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.4 μg/m3 (29) | 13.0 μg/m3 (53) | 53.0 | |
| April 17, 2021, 11 a.m. | 8.6 ppb (9) | 0.8 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 20.0 ppb (19) | N/A | 32.6 μg/m3 (31) | 13.0 μg/m3 (53) | 53.0 | |
| April 17, 2021, 10 a.m. | 8.7 ppb (9) | 0.8 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 22.0 ppb (21) | N/A | 36.2 μg/m3 (34) | 11.0 μg/m3 (46) | 46.0 | |
| April 17, 2021, 9 a.m. | 8.3 ppb (8) | 0.8 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 25.0 ppb (24) | N/A | 40.1 μg/m3 (38) | 12.0 μg/m3 (50) | 50.0 | |
| April 17, 2021, 8 a.m. | 6.8 ppb (7) | 0.7 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 28.0 ppb (26) | N/A | 36.8 μg/m3 (35) | 12.0 μg/m3 (50) | 50.0 | |
| April 17, 2021, 7 a.m. | 9.6 ppb (10) | 0.8 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 27.0 ppb (25) | N/A | 52.4 μg/m3 (49) | 14.0 μg/m3 (55) | 55.0 | |
| April 17, 2021, 6 a.m. | 12.9 ppb (13) | 1.0 ppb (1) | N/A | 12.0 ppb (12) | N/A | N/A | 24.0 ppb (23) | N/A | 52.8 μg/m3 (49) | 13.0 μg/m3 (53) | 53.0 | |
| April 17, 2021, 5 a.m. | 10.1 ppb (10) | 0.7 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 32.0 ppb (30) | N/A | 52.2 μg/m3 (49) | 8.0 μg/m3 (34) | 49.0 | |
| April 17, 2021, 4 a.m. | 6.9 ppb (7) | 0.5 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 39.0 ppb (37) | N/A | 45.0 μg/m3 (42) | 11.0 μg/m3 (46) | 46.0 | |
| April 17, 2021, 3 a.m. | 7.3 ppb (7) | 0.5 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 40.0 ppb (38) | N/A | 52.6 μg/m3 (49) | 8.0 μg/m3 (34) | 49.0 | |
| April 17, 2021, 2 a.m. | 5.6 ppb (6) | 0.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (41) | N/A | 49.8 μg/m3 (47) | 12.0 μg/m3 (50) | 50.0 | |
| April 17, 2021, 1 a.m. | 3.5 ppb (4) | 0.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | 40.7 μg/m3 (38) | 12.0 μg/m3 (50) | 50.0 | |
| April 17, 2021, midnight | 3.5 ppb (4) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | N/A | 43.2 μg/m3 (40) | 10.0 μg/m3 (42) | 49.0 | |
| April 16, 2021, 11 p.m. | 3.5 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | N/A | 47.1 μg/m3 (44) | 11.0 μg/m3 (46) | 49.0 | |
| April 16, 2021, 10 p.m. | 4.1 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 52.0 ppb (49) | N/A | 43.4 μg/m3 (41) | 8.0 μg/m3 (34) | 49.0 | |
| April 16, 2021, 9 p.m. | 4.0 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | 49.9 μg/m3 (47) | 9.0 μg/m3 (38) | 48.0 | |
| April 16, 2021, 8 p.m. | 6.5 ppb (7) | 1.2 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 47.0 ppb (44) | N/A | 57.2 μg/m3 (53) | 16.0 μg/m3 (60) | 60.0 | |
| April 16, 2021, 7 p.m. | 13.8 ppb (14) | 3.2 ppb (4) | N/A | 11.0 ppb (11) | N/A | N/A | 38.0 ppb (36) | N/A | 67.9 μg/m3 (58) | 21.0 μg/m3 (70) | 70.0 | |
| April 16, 2021, 6 p.m. | 11.6 ppb (11) | 3.1 ppb (3) | N/A | 9.0 ppb (9) | N/A | N/A | 34.0 ppb (32) | N/A | 64.4 μg/m3 (56) | 21.0 μg/m3 (70) | 70.0 | |
| April 16, 2021, 5 p.m. | 11.2 ppb (11) | 3.7 ppb (4) | N/A | 8.0 ppb (8) | N/A | N/A | 26.0 ppb (25) | N/A | 73.3 μg/m3 (61) | 18.0 μg/m3 (64) | 64.0 | |
| April 16, 2021, 4 p.m. | 10.1 ppb (10) | 3.6 ppb (4) | N/A | 7.0 ppb (7) | N/A | N/A | 23.0 ppb (22) | N/A | 53.9 μg/m3 (50) | 14.0 μg/m3 (55) | 55.0 | |
| April 16, 2021, 3 p.m. | 12.1 ppb (12) | 4.1 ppb (4) | N/A | 8.0 ppb (8) | N/A | N/A | 19.0 ppb (18) | N/A | 61.4 μg/m3 (55) | 18.0 μg/m3 (64) | 64.0 | |
| April 16, 2021, 2 p.m. | 20.4 ppb (20) | 6.0 ppb (6) | N/A | 14.0 ppb (14) | N/A | N/A | 14.0 ppb (13) | N/A | 74.2 μg/m3 (61) | 16.0 μg/m3 (60) | 61.0 | |
| April 16, 2021, 1 p.m. | 23.0 ppb (22) | 4.4 ppb (5) | N/A | 19.0 ppb (18) | N/A | N/A | 5.0 ppb (5) | N/A | 43.8 μg/m3 (41) | 11.0 μg/m3 (46) | 46.0 | |
| April 16, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 37.4 μg/m3 (35) | 10.0 μg/m3 (42) | 42.0 | |
| April 16, 2021, 11 a.m. | 8.9 ppb (9) | 0.9 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 17.0 ppb (16) | N/A | 29.5 μg/m3 (28) | 12.0 μg/m3 (50) | 50.0 | |
| April 16, 2021, 10 a.m. | 8.4 ppb (8) | 0.8 ppb (1) | N/A | 8.0 ppb (8) | N/A | N/A | 19.0 ppb (18) | N/A | 40.0 μg/m3 (38) | 13.0 μg/m3 (53) | 53.0 | |
| April 16, 2021, 9 a.m. | 7.3 ppb (7) | 0.7 ppb (1) | N/A | 7.0 ppb (7) | N/A | N/A | 23.0 ppb (22) | N/A | 34.0 μg/m3 (32) | 14.0 μg/m3 (55) | 55.0 | |
| April 16, 2021, 8 a.m. | 10.1 ppb (10) | 0.9 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 21.0 ppb (20) | N/A | 40.3 μg/m3 (38) | 12.0 μg/m3 (50) | 50.0 | |
| April 16, 2021, 7 a.m. | 11.9 ppb (12) | 0.9 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 21.0 ppb (20) | N/A | 45.0 μg/m3 (42) | 12.0 μg/m3 (50) | 50.0 | |
| April 16, 2021, 6 a.m. | 11.8 ppb (12) | 1.0 ppb (1) | N/A | 11.0 ppb (11) | N/A | N/A | 22.0 ppb (21) | N/A | 51.6 μg/m3 (48) | 11.0 μg/m3 (46) | 48.0 | |
| April 16, 2021, 5 a.m. | 18.2 ppb (18) | 0.9 ppb (1) | N/A | 17.0 ppb (17) | N/A | N/A | 20.0 ppb (19) | N/A | 46.8 μg/m3 (44) | 12.0 μg/m3 (50) | 50.0 | |
| April 16, 2021, 4 a.m. | 13.5 ppb (13) | 0.6 ppb (1) | N/A | 13.0 ppb (13) | N/A | N/A | 29.0 ppb (27) | N/A | 45.1 μg/m3 (42) | 10.0 μg/m3 (42) | 42.0 | |
| April 16, 2021, 3 a.m. | 9.5 ppb (9) | 0.4 ppb (1) | N/A | 9.0 ppb (9) | N/A | N/A | 36.0 ppb (34) | N/A | 37.4 μg/m3 (35) | N/A | 35.0 | |
| April 16, 2021, 2 a.m. | 5.0 ppb (5) | 0.3 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 46.0 ppb (43) | N/A | 37.5 μg/m3 (35) | 8.0 μg/m3 (34) | 43.0 | |
| April 16, 2021, 1 a.m. | 3.0 ppb (3) | 0.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 51.0 ppb (48) | N/A | 36.7 μg/m3 (34) | 8.0 μg/m3 (34) | 48.0 | |
| April 16, 2021, midnight | 3.8 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 50.0 ppb (47) | N/A | 40.4 μg/m3 (38) | 8.0 μg/m3 (34) | 47.0 | |
| April 15, 2021, 11 p.m. | 3.1 ppb (3) | 0.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 48.0 ppb (45) | N/A | 40.8 μg/m3 (38) | 7.0 μg/m3 (30) | 45.0 | |
| April 15, 2021, 10 p.m. | 3.1 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (44) | N/A | 35.6 μg/m3 (33) | 6.0 μg/m3 (25) | 44.0 | |
| April 15, 2021, 9 p.m. | 3.4 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 47.0 ppb (44) | N/A | 46.1 μg/m3 (43) | 6.0 μg/m3 (25) | 44.0 | |
| April 15, 2021, 8 p.m. | 3.9 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 46.0 ppb (43) | N/A | 41.5 μg/m3 (39) | 7.0 μg/m3 (30) | 43.0 | |
| April 15, 2021, 7 p.m. | 5.6 ppb (6) | 1.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 44.0 ppb (41) | N/A | 44.5 μg/m3 (42) | 11.0 μg/m3 (46) | 46.0 | |
| April 15, 2021, 6 p.m. | 7.9 ppb (8) | 1.9 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 39.0 ppb (37) | N/A | 47.6 μg/m3 (45) | 15.0 μg/m3 (58) | 58.0 | |
| April 15, 2021, 5 p.m. | 7.0 ppb (7) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 35.0 ppb (33) | N/A | 53.7 μg/m3 (50) | 15.0 μg/m3 (58) | 58.0 | |
| April 15, 2021, 4 p.m. | 6.7 ppb (7) | 2.1 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 28.0 ppb (26) | N/A | 50.5 μg/m3 (47) | 15.0 μg/m3 (58) | 58.0 | |
| April 15, 2021, 3 p.m. | 8.1 ppb (8) | 2.5 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | 23.0 ppb (22) | N/A | 47.4 μg/m3 (44) | 12.0 μg/m3 (50) | 50.0 | |
| April 15, 2021, 2 p.m. | 12.8 ppb (13) | 2.8 ppb (3) | N/A | 10.0 ppb (10) | N/A | N/A | 21.0 ppb (20) | N/A | 45.2 μg/m3 (42) | 16.0 μg/m3 (60) | 60.0 | |
| April 15, 2021, 1 p.m. | 12.5 ppb (12) | 1.1 ppb (2) | N/A | 11.0 ppb (11) | N/A | N/A | 18.0 ppb (17) | N/A | 41.9 μg/m3 (39) | 20.0 μg/m3 (68) | 68.0 | |
| April 15, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 44.5 μg/m3 (42) | 17.0 μg/m3 (62) | 62.0 | |
| April 15, 2021, 11 a.m. | 6.5 ppb (7) | 0.7 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 23.0 ppb (22) | N/A | 43.9 μg/m3 (41) | 14.0 μg/m3 (55) | 55.0 | |
| April 15, 2021, 10 a.m. | 5.9 ppb (6) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 22.0 ppb (21) | N/A | 48.2 μg/m3 (45) | 20.0 μg/m3 (68) | 68.0 | |
| April 15, 2021, 9 a.m. | 6.6 ppb (7) | 0.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 23.0 ppb (22) | N/A | 35.2 μg/m3 (33) | 17.0 μg/m3 (62) | 62.0 |