Simi Valley (Simi Valley High School) CA, US: 34.2775, -118.6847
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| July 25, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 22.0 μg/m3 (21) | 12.0 μg/m3 (50) | 50.0 | |
| July 25, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 21.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| July 25, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 27.0 μg/m3 (25) | 16.0 μg/m3 (60) | 60.0 | |
| July 25, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | N/A | 27.0 μg/m3 (25) | 12.0 μg/m3 (50) | 50.0 | |
| July 25, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 53.0 ppb (50) | N/A | 36.0 μg/m3 (34) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 41.0 μg/m3 (38) | 13.0 μg/m3 (53) | 55.0 | |
| July 24, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 42.0 μg/m3 (39) | 16.0 μg/m3 (60) | 60.0 | |
| July 24, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 41.0 μg/m3 (38) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 ppb (91) | N/A | 49.0 μg/m3 (46) | 20.0 μg/m3 (68) | 91.0 | |
| July 24, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 69.0 ppb (97) | N/A | 36.0 μg/m3 (34) | 19.0 μg/m3 (66) | 97.0 | |
| July 24, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 37.0 μg/m3 (35) | 17.0 μg/m3 (62) | 62.0 | |
| July 24, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 36.0 μg/m3 (34) | 17.0 μg/m3 (62) | 62.0 | |
| July 24, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 40.0 μg/m3 (38) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 36.0 μg/m3 (34) | 16.0 μg/m3 (60) | 60.0 | |
| July 24, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 42.0 μg/m3 (39) | 17.0 μg/m3 (62) | 62.0 | |
| July 24, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | N/A | 35.0 μg/m3 (33) | 8.0 μg/m3 (34) | 34.0 | |
| July 24, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 36.0 μg/m3 (34) | 9.0 μg/m3 (38) | 38.0 | |
| July 24, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 32.0 μg/m3 (30) | 9.0 μg/m3 (38) | 38.0 | |
| July 24, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 32.0 μg/m3 (30) | 9.0 μg/m3 (38) | 38.0 | |
| July 24, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 μg/m3 (31) | 12.0 μg/m3 (50) | 50.0 | |
| July 24, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 34.0 μg/m3 (32) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 38.0 μg/m3 (36) | 18.0 μg/m3 (64) | 64.0 | |
| July 24, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 34.0 μg/m3 (32) | 16.0 μg/m3 (60) | 60.0 | |
| July 24, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 38.0 μg/m3 (36) | 13.0 μg/m3 (53) | 53.0 | |
| July 24, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 35.0 μg/m3 (33) | 18.0 μg/m3 (64) | 64.0 | |
| July 24, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 38.0 μg/m3 (36) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | N/A | 50.0 μg/m3 (47) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 48.0 μg/m3 (45) | 15.0 μg/m3 (58) | 58.0 | |
| July 24, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 54.0 μg/m3 (50) | 19.0 μg/m3 (66) | 66.0 | |
| July 23, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 58.0 μg/m3 (53) | 21.0 μg/m3 (70) | 70.0 | |
| July 23, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | N/A | 57.0 μg/m3 (52) | 14.0 μg/m3 (55) | 61.0 | |
| July 23, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (65) | N/A | 54.0 μg/m3 (50) | 17.0 μg/m3 (62) | 65.0 | |
| July 23, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (68) | N/A | 63.0 μg/m3 (55) | 18.0 μg/m3 (64) | 68.0 | |
| July 23, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | N/A | 50.0 μg/m3 (47) | 20.0 μg/m3 (68) | 68.0 | |
| July 23, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 40.0 μg/m3 (38) | 22.0 μg/m3 (72) | 72.0 | |
| July 23, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 41.0 μg/m3 (38) | 15.0 μg/m3 (58) | 58.0 | |
| July 23, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 44.0 μg/m3 (41) | 22.0 μg/m3 (72) | 72.0 | |
| July 23, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 40.0 μg/m3 (38) | 20.0 μg/m3 (68) | 68.0 | |
| July 23, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 43.0 μg/m3 (40) | 19.0 μg/m3 (66) | 66.0 | |
| July 23, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 45.0 μg/m3 (42) | 22.0 μg/m3 (72) | 72.0 | |
| July 23, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | N/A | 40.0 μg/m3 (38) | 18.0 μg/m3 (64) | 64.0 | |
| July 23, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 29.0 μg/m3 (27) | 14.0 μg/m3 (55) | 55.0 | |
| July 23, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | N/A | 36.0 μg/m3 (34) | 19.0 μg/m3 (66) | 66.0 | |
| July 23, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 μg/m3 (36) | 19.0 μg/m3 (66) | 66.0 | |
| July 23, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 36.0 μg/m3 (34) | 21.0 μg/m3 (70) | 70.0 | |
| July 23, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 37.0 μg/m3 (35) | 21.0 μg/m3 (70) | 70.0 | |
| July 23, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 35.0 μg/m3 (33) | 14.0 μg/m3 (55) | 55.0 | |
| July 23, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 40.0 μg/m3 (38) | 20.0 μg/m3 (68) | 68.0 | |
| July 23, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 43.0 μg/m3 (40) | 19.0 μg/m3 (66) | 66.0 | |
| July 23, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 52.0 μg/m3 (49) | 21.0 μg/m3 (70) | 70.0 | |
| July 23, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 53.0 μg/m3 (50) | 23.0 μg/m3 (74) | 74.0 | |
| July 23, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 49.0 μg/m3 (46) | 19.0 μg/m3 (66) | 66.0 | |
| July 23, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 51.0 μg/m3 (48) | 21.0 μg/m3 (70) | 70.0 | |
| July 22, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (58) | N/A | 57.0 μg/m3 (52) | 24.0 μg/m3 (77) | 77.0 | |
| July 22, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 63.0 μg/m3 (55) | 19.0 μg/m3 (66) | 66.0 | |
| July 22, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 60.0 μg/m3 (54) | 18.0 μg/m3 (64) | 64.0 | |
| July 22, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | N/A | 68.0 μg/m3 (58) | 20.0 μg/m3 (68) | 68.0 | |
| July 22, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 ppb (78) | N/A | 43.0 μg/m3 (40) | 17.0 μg/m3 (62) | 78.0 | |
| July 22, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 30.0 μg/m3 (28) | 9.0 μg/m3 (38) | 50.0 | |
| July 22, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | N/A | 33.0 μg/m3 (31) | 15.0 μg/m3 (58) | 58.0 | |
| July 22, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 42.0 μg/m3 (39) | 16.0 μg/m3 (60) | 60.0 | |
| July 22, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 42.0 μg/m3 (39) | 19.0 μg/m3 (66) | 66.0 | |
| July 22, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 46.0 μg/m3 (43) | 19.0 μg/m3 (66) | 66.0 | |
| July 22, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | N/A | 41.0 μg/m3 (38) | 15.0 μg/m3 (58) | 58.0 | |
| July 22, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 35.0 μg/m3 (33) | 15.0 μg/m3 (58) | 58.0 | |
| July 22, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 18.0 μg/m3 (17) | 12.0 μg/m3 (50) | 50.0 | |
| July 22, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 22.0 μg/m3 (21) | 12.0 μg/m3 (50) | 50.0 | |
| July 22, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 μg/m3 (23) | 15.0 μg/m3 (58) | 58.0 | |
| July 22, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 28.0 μg/m3 (26) | 14.0 μg/m3 (55) | 55.0 | |
| July 22, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 27.0 μg/m3 (25) | 13.0 μg/m3 (53) | 53.0 | |
| July 22, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | N/A | 43.0 μg/m3 (40) | 18.0 μg/m3 (64) | 64.0 | |
| July 22, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 44.0 μg/m3 (41) | 17.0 μg/m3 (62) | 62.0 | |
| July 22, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 40.0 μg/m3 (38) | 12.0 μg/m3 (50) | 50.0 | |
| July 22, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 44.0 μg/m3 (41) | 17.0 μg/m3 (62) | 62.0 | |
| July 22, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 46.0 μg/m3 (43) | 18.0 μg/m3 (64) | 64.0 | |
| July 22, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 34.0 μg/m3 (32) | 13.0 μg/m3 (53) | 53.0 | |
| July 22, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 49.0 μg/m3 (46) | 12.0 μg/m3 (50) | 50.0 | |
| July 21, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 53.0 μg/m3 (50) | 14.0 μg/m3 (55) | 55.0 | |
| July 21, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 62.0 μg/m3 (55) | 16.0 μg/m3 (60) | 60.0 | |
| July 21, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (74) | N/A | 63.0 μg/m3 (55) | 17.0 μg/m3 (62) | 74.0 | |
| July 21, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 70.0 ppb (100) | N/A | 58.0 μg/m3 (53) | 17.0 μg/m3 (62) | 100.0 | |
| July 21, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 72.0 ppb (102) | N/A | 48.0 μg/m3 (45) | 18.0 μg/m3 (64) | 102.0 | |
| July 21, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 65.0 ppb (84) | N/A | 26.0 μg/m3 (25) | 7.0 μg/m3 (30) | 84.0 | |
| July 21, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 30.0 μg/m3 (28) | 9.0 μg/m3 (38) | 50.0 | |
| July 21, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | N/A | 36.0 μg/m3 (34) | 13.0 μg/m3 (53) | 53.0 | |
| July 21, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 36.0 μg/m3 (34) | 15.0 μg/m3 (58) | 58.0 | |
| July 21, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 52.0 μg/m3 (49) | 16.0 μg/m3 (60) | 60.0 | |
| July 21, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | N/A | 80.0 μg/m3 (64) | 15.0 μg/m3 (58) | 64.0 | |
| July 21, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 25.0 μg/m3 (24) | 11.0 μg/m3 (46) | 46.0 | |
| July 21, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 25.0 μg/m3 (24) | 10.0 μg/m3 (42) | 42.0 | |
| July 21, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 26.0 μg/m3 (25) | 13.0 μg/m3 (53) | 53.0 | |
| July 21, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 μg/m3 (29) | 11.0 μg/m3 (46) | 46.0 | |
| July 21, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | N/A | 32.0 μg/m3 (30) | 16.0 μg/m3 (60) | 60.0 | |
| July 21, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 32.0 μg/m3 (30) | 13.0 μg/m3 (53) | 53.0 | |
| July 21, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 28.0 μg/m3 (26) | 13.0 μg/m3 (53) | 53.0 | |
| July 21, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 36.0 ppb (34) | N/A | 27.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| July 21, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 34.0 μg/m3 (32) | 15.0 μg/m3 (58) | 58.0 | |
| July 21, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 32.0 μg/m3 (30) | 15.0 μg/m3 (58) | 58.0 | |
| July 21, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | N/A | 34.0 μg/m3 (32) | 11.0 μg/m3 (46) | 46.0 | |
| July 21, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 36.0 μg/m3 (34) | 8.0 μg/m3 (34) | 41.0 | |
| July 21, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 31.0 μg/m3 (29) | 9.0 μg/m3 (38) | 43.0 | |
| July 20, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 45.0 μg/m3 (42) | 6.0 μg/m3 (25) | 45.0 | |
| July 20, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 36.0 μg/m3 (34) | 10.0 μg/m3 (42) | 44.0 | |
| July 20, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 30.0 μg/m3 (28) | 7.0 μg/m3 (30) | 43.0 | |
| July 20, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 31.0 μg/m3 (29) | 5.0 μg/m3 (21) | 45.0 | |
| July 20, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 27.0 μg/m3 (25) | 6.0 μg/m3 (25) | 49.0 | |
| July 20, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 56.0 ppb (55) | N/A | 27.0 μg/m3 (25) | 4.0 μg/m3 (17) | 55.0 | |
| July 20, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 25.0 μg/m3 (24) | 5.0 μg/m3 (21) | 51.0 | |
| July 20, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 44.0 ppb (41) | N/A | 17.0 μg/m3 (16) | 5.0 μg/m3 (21) | 41.0 | |
| July 20, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | N/A | 22.0 μg/m3 (21) | 6.0 μg/m3 (25) | 30.0 | |
| July 20, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 26.0 μg/m3 (25) | 10.0 μg/m3 (42) | 42.0 | |
| July 20, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 ppb (10) | N/A | 19.0 μg/m3 (18) | 7.0 μg/m3 (30) | 30.0 | |
| July 20, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 21.0 μg/m3 (20) | 10.0 μg/m3 (42) | 42.0 | |
| July 20, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | N/A | 24.0 μg/m3 (23) | 8.0 μg/m3 (34) | 34.0 | |
| July 20, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | N/A | 22.0 μg/m3 (21) | 9.0 μg/m3 (38) | 38.0 | |
| July 20, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (14) | 11.0 μg/m3 (46) | 46.0 | |
| July 20, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 23.0 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| July 20, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | N/A | 24.0 μg/m3 (23) | 13.0 μg/m3 (53) | 53.0 | |
| July 20, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | N/A | 22.0 μg/m3 (21) | 8.0 μg/m3 (34) | 34.0 | |
| July 20, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | N/A | 22.0 μg/m3 (21) | 10.0 μg/m3 (42) | 42.0 | |
| July 20, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 27.0 μg/m3 (25) | 6.0 μg/m3 (25) | 44.0 | |
| July 20, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 21.0 μg/m3 (20) | 8.0 μg/m3 (34) | 46.0 | |
| July 20, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | N/A | 24.0 μg/m3 (23) | 9.0 μg/m3 (38) | 45.0 | |
| July 20, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 26.0 μg/m3 (25) | 2.0 μg/m3 (9) | 43.0 | |
| July 20, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 46.0 ppb (43) | N/A | 32.0 μg/m3 (30) | 2.0 μg/m3 (9) | 43.0 | |
| July 19, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 31.0 μg/m3 (29) | 2.0 μg/m3 (9) | 46.0 | |
| July 19, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 ppb (49) | N/A | 28.0 μg/m3 (26) | 3.0 μg/m3 (13) | 49.0 | |
| July 19, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | N/A | 30.0 μg/m3 (28) | 5.0 μg/m3 (21) | 48.0 | |
| July 19, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 34.0 μg/m3 (32) | 6.0 μg/m3 (25) | 51.0 | |
| July 19, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 61.0 ppb (71) | N/A | 26.0 μg/m3 (25) | 8.0 μg/m3 (34) | 71.0 | |
| July 19, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 65.0 ppb (84) | N/A | 26.0 μg/m3 (25) | 6.0 μg/m3 (25) | 84.0 | |
| July 19, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 57.0 ppb (58) | N/A | 20.0 μg/m3 (19) | 6.0 μg/m3 (25) | 58.0 | |
| July 19, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 35.0 μg/m3 (33) | 8.0 μg/m3 (34) | 39.0 | |
| July 19, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 38.0 μg/m3 (36) | 8.0 μg/m3 (34) | 36.0 | |
| July 19, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | N/A | 29.0 μg/m3 (27) | 9.0 μg/m3 (38) | 38.0 | |
| July 19, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 27.0 μg/m3 (25) | 10.0 μg/m3 (42) | 42.0 | |
| July 19, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 ppb (20) | N/A | 17.0 μg/m3 (16) | 5.0 μg/m3 (21) | 21.0 | |
| July 19, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 16.0 μg/m3 (15) | 7.0 μg/m3 (30) | 30.0 | |
| July 19, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | N/A | 17.0 μg/m3 (16) | 8.0 μg/m3 (34) | 34.0 | |
| July 19, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (17) | 5.0 μg/m3 (21) | 21.0 | |
| July 19, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 ppb (25) | N/A | 24.0 μg/m3 (23) | 6.0 μg/m3 (25) | 25.0 | |
| July 19, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | N/A | 29.0 μg/m3 (27) | 8.0 μg/m3 (34) | 34.0 | |
| July 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | N/A | 25.0 μg/m3 (24) | 12.0 μg/m3 (50) | 50.0 | |
| July 19, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | N/A | 24.0 μg/m3 (23) | 12.0 μg/m3 (50) | 50.0 | |
| July 19, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 ppb (46) | N/A | 23.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| July 19, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | N/A | 19.0 μg/m3 (18) | 8.0 μg/m3 (34) | 48.0 | |
| July 19, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 14.0 μg/m3 (13) | 8.0 μg/m3 (34) | 50.0 | |
| July 19, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 15.0 μg/m3 (14) | 8.0 μg/m3 (34) | 51.0 | |
| July 19, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | N/A | 23.0 μg/m3 (22) | 8.0 μg/m3 (34) | 51.0 | |
| July 18, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | N/A | 21.0 μg/m3 (20) | 6.0 μg/m3 (25) | 61.0 | |
| July 18, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (65) | N/A | 28.0 μg/m3 (26) | 9.0 μg/m3 (38) | 65.0 | |
| July 18, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 60.0 ppb (68) | N/A | 33.0 μg/m3 (31) | 13.0 μg/m3 (53) | 68.0 | |
| July 18, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 63.0 ppb (78) | N/A | 29.0 μg/m3 (27) | 12.0 μg/m3 (50) | 78.0 | |
| July 18, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 69.0 ppb (97) | N/A | 19.0 μg/m3 (18) | 5.0 μg/m3 (21) | 97.0 | |
| July 18, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (74) | N/A | 17.0 μg/m3 (16) | 5.0 μg/m3 (21) | 74.0 | |
| July 18, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | N/A | 18.0 μg/m3 (17) | 7.0 μg/m3 (30) | 50.0 | |
| July 18, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | N/A | 16.0 μg/m3 (15) | 7.0 μg/m3 (30) | 44.0 | |
| July 18, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | N/A | 19.0 μg/m3 (18) | 9.0 μg/m3 (38) | 38.0 | |
| July 18, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | N/A | 18.0 μg/m3 (17) | 11.0 μg/m3 (46) | 46.0 | |
| July 18, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | N/A | 20.0 μg/m3 (19) | 8.0 μg/m3 (34) | 34.0 | |
| July 18, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | N/A | 22.0 μg/m3 (21) | 9.0 μg/m3 (38) | 38.0 | |
| July 18, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | N/A | 20.0 μg/m3 (19) | 11.0 μg/m3 (46) | 46.0 | |
| July 18, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 19.0 ppb (18) | N/A | 21.0 μg/m3 (20) | 14.0 μg/m3 (55) | 55.0 | |
| July 18, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 μg/m3 (23) | 14.0 μg/m3 (55) | 55.0 | |
| July 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 22.0 μg/m3 (21) | 14.0 μg/m3 (55) | 55.0 | |
| July 18, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 ppb (24) | N/A | 31.0 μg/m3 (29) | 12.0 μg/m3 (50) | 50.0 | |
| July 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | N/A | 31.0 μg/m3 (29) | 15.0 μg/m3 (58) | 58.0 | |
| July 18, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | N/A | 25.0 μg/m3 (24) | 11.0 μg/m3 (46) | 46.0 |