Modesto (Downtown) CA, US: 37.642165, -120.994212
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct. 19, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.25 ppb (3) | 23.0 μg/m3 (22) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 19, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | 0.22 ppb (3) | 25.0 μg/m3 (24) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 19, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | 0.2 ppb (3) | 22.0 μg/m3 (21) | 9.0 μg/m3 (38) | 38.0 | |
| Oct. 19, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 12.0 ppb (12) | 0.17 ppb (3) | 28.0 μg/m3 (26) | 15.0 μg/m3 (58) | 58.0 | |
| Oct. 19, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | 0.12 ppb (2) | 22.0 μg/m3 (21) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 19, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 ppb (14) | 0.15 ppb (2) | 30.0 μg/m3 (28) | 8.0 μg/m3 (34) | 34.0 | |
| Oct. 19, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | 0.16 ppb (3) | 43.0 μg/m3 (40) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 19, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | 0.34 ppb (4) | 49.0 μg/m3 (46) | 15.0 μg/m3 (58) | 58.0 | |
| Oct. 19, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | 0.19 ppb (3) | 55.0 μg/m3 (51) | 10.0 μg/m3 (42) | 51.0 | |
| Oct. 19, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | 0.14 ppb (2) | 39.0 μg/m3 (37) | 11.0 μg/m3 (46) | 46.0 | |
| Oct. 19, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | 0.08 ppb (2) | 38.0 μg/m3 (36) | 8.0 μg/m3 (34) | 36.0 | |
| Oct. 19, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | 0.06 ppb (2) | 31.0 μg/m3 (29) | 6.0 μg/m3 (25) | 39.0 | |
| Oct. 18, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | 0.05 ppb (2) | 28.0 μg/m3 (26) | 3.0 μg/m3 (13) | 39.0 | |
| Oct. 18, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.05 ppb (2) | 28.0 μg/m3 (26) | 5.0 μg/m3 (21) | 38.0 | |
| Oct. 18, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.04 ppb (0) | 23.0 μg/m3 (22) | 5.0 μg/m3 (21) | 38.0 | |
| Oct. 18, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 38.0 ppb (36) | 0.04 ppb (0) | 27.0 μg/m3 (25) | 6.0 μg/m3 (25) | 36.0 | |
| Oct. 18, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | 0.04 ppb (0) | 33.0 μg/m3 (31) | 9.0 μg/m3 (38) | 38.0 | |
| Oct. 18, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 33.0 ppb (31) | 0.04 ppb (0) | 32.0 μg/m3 (30) | 9.0 μg/m3 (38) | 38.0 | |
| Oct. 18, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 32.0 ppb (30) | 0.05 ppb (2) | 39.0 μg/m3 (37) | 8.0 μg/m3 (34) | 37.0 | |
| Oct. 18, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 28.0 ppb (26) | 0.07 ppb (2) | 36.0 μg/m3 (34) | 11.0 μg/m3 (46) | 46.0 | |
| Oct. 18, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 ppb (15) | 0.16 ppb (3) | 28.0 μg/m3 (26) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 18, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 ppb (11) | 0.2 ppb (3) | 36.0 μg/m3 (34) | 10.0 μg/m3 (42) | 42.0 | |
| Oct. 18, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 ppb (7) | 0.18 ppb (3) | 27.0 μg/m3 (25) | 7.0 μg/m3 (30) | 30.0 | |
| Oct. 18, 2021, noon | 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 | |
| Oct. 18, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 27.0 ppb (25) | 0.05 ppb (2) | 13.0 μg/m3 (13) | 7.0 μg/m3 (30) | 30.0 | |
| Oct. 18, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 31.0 ppb (29) | 0.03 ppb (0) | 13.0 μg/m3 (13) | 4.0 μg/m3 (17) | 29.0 | |
| Oct. 18, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 34.0 ppb (32) | 0.03 ppb (0) | 14.0 μg/m3 (13) | 5.0 μg/m3 (21) | 32.0 | |
| Oct. 18, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | 0.02 ppb (0) | 11.0 μg/m3 (11) | 3.0 μg/m3 (13) | 35.0 | |
| Oct. 18, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 35.0 ppb (33) | 0.03 ppb (0) | 12.0 μg/m3 (12) | 4.0 μg/m3 (17) | 33.0 | |
| Oct. 18, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 37.0 ppb (35) | 0.03 ppb (0) | 12.0 μg/m3 (12) | 6.0 μg/m3 (25) | 35.0 | |
| Oct. 18, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | 0.02 ppb (0) | 7.0 μg/m3 (7) | 4.0 μg/m3 (17) | 37.0 | |
| Oct. 18, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | 0.02 ppb (0) | 18.0 μg/m3 (17) | 8.0 μg/m3 (34) | 38.0 | |
| Oct. 18, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.02 ppb (0) | 178.0 μg/m3 (113) | 12.0 μg/m3 (50) | 113.0 | |
| Oct. 18, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | 0.02 ppb (0) | 71.0 μg/m3 (59) | 12.0 μg/m3 (50) | 59.0 | |
| Oct. 18, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | 0.04 ppb (0) | 140.0 μg/m3 (94) | 15.0 μg/m3 (58) | 94.0 | |
| Oct. 18, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 47.0 ppb (44) | 0.05 ppb (2) | 57.0 μg/m3 (52) | 7.0 μg/m3 (30) | 52.0 | |
| Oct. 17, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | 0.04 ppb (0) | 129.0 μg/m3 (88) | 16.0 μg/m3 (60) | 88.0 | |
| Oct. 17, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 ppb (47) | 0.04 ppb (0) | 48.0 μg/m3 (45) | 8.0 μg/m3 (34) | 47.0 | |
| Oct. 17, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 54.0 ppb (50) | 0.05 ppb (2) | 46.0 μg/m3 (43) | 8.0 μg/m3 (34) | 50.0 | |
| Oct. 17, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 55.0 ppb (51) | 0.07 ppb (2) | 48.0 μg/m3 (45) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 17, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 51.0 ppb (48) | 0.09 ppb (2) | 57.0 μg/m3 (52) | 18.0 μg/m3 (64) | 64.0 | |
| Oct. 17, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 43.0 ppb (40) | 0.16 ppb (3) | 67.0 μg/m3 (57) | 23.0 μg/m3 (74) | 74.0 | |
| Oct. 17, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | 0.17 ppb (3) | 70.0 μg/m3 (59) | 22.0 μg/m3 (72) | 72.0 | |
| Oct. 17, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | 0.14 ppb (2) | 70.0 μg/m3 (59) | 18.0 μg/m3 (64) | 64.0 | |
| Oct. 17, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 22.0 ppb (21) | 0.13 ppb (2) | 56.0 μg/m3 (52) | 12.0 μg/m3 (50) | 52.0 | |
| Oct. 17, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | 0.17 ppb (3) | 47.0 μg/m3 (44) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 17, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | 0.16 ppb (3) | 40.0 μg/m3 (38) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 17, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 50.0 μg/m3 (47) | 15.0 μg/m3 (58) | 58.0 | |
| Oct. 17, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 18.0 ppb (17) | 0.16 ppb (3) | 60.0 μg/m3 (54) | 17.0 μg/m3 (62) | 62.0 | |
| Oct. 17, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 24.0 ppb (23) | 0.14 ppb (2) | 47.0 μg/m3 (44) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 17, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 ppb (28) | 0.16 ppb (3) | 46.0 μg/m3 (43) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 17, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 20.0 ppb (19) | 0.4 ppb (5) | 89.0 μg/m3 (68) | 21.0 μg/m3 (70) | 70.0 | |
| Oct. 17, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 0.91 ppb (11) | 91.0 μg/m3 (69) | 39.0 μg/m3 (110) | 110.0 | |
| Oct. 17, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 ppb (5) | 0.76 ppb (10) | 78.0 μg/m3 (63) | 27.0 μg/m3 (83) | 83.0 | |
| Oct. 17, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 1.02 ppb (12) | 89.0 μg/m3 (68) | 31.0 μg/m3 (91) | 91.0 | |
| Oct. 17, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 8.0 ppb (8) | 0.82 ppb (10) | 83.0 μg/m3 (65) | 29.0 μg/m3 (87) | 87.0 | |
| Oct. 17, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | 1.0 ppb (12) | 100.0 μg/m3 (74) | 28.0 μg/m3 (85) | 85.0 | |
| Oct. 17, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 ppb (13) | 0.79 ppb (10) | 76.0 μg/m3 (62) | 21.0 μg/m3 (70) | 70.0 | |
| Oct. 17, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.39 ppb (5) | 72.0 μg/m3 (60) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 17, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 65.0 ppb (84) | 0.1 ppb (2) | 68.0 μg/m3 (58) | 11.0 μg/m3 (46) | 84.0 | |
| Oct. 16, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 67.0 ppb (91) | 0.09 ppb (2) | 56.0 μg/m3 (52) | 14.0 μg/m3 (55) | 91.0 | |
| Oct. 16, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (74) | 0.08 ppb (2) | 62.0 μg/m3 (55) | 14.0 μg/m3 (55) | 74.0 | |
| Oct. 16, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 62.0 ppb (74) | 0.1 ppb (2) | 67.0 μg/m3 (57) | 12.0 μg/m3 (50) | 74.0 | |
| Oct. 16, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 59.0 ppb (65) | 0.15 ppb (2) | 60.0 μg/m3 (54) | 14.0 μg/m3 (55) | 65.0 | |
| Oct. 16, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 58.0 ppb (61) | 0.18 ppb (3) | 55.0 μg/m3 (51) | 13.0 μg/m3 (53) | 61.0 | |
| Oct. 16, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 48.0 ppb (45) | 0.18 ppb (3) | 59.0 μg/m3 (53) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 16, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.17 ppb (3) | 46.0 μg/m3 (43) | 15.0 μg/m3 (58) | 58.0 | |
| Oct. 16, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 29.0 ppb (27) | 0.3 ppb (4) | 69.0 μg/m3 (58) | 15.0 μg/m3 (58) | 58.0 | |
| Oct. 16, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | 0.65 ppb (8) | 65.0 μg/m3 (56) | 17.0 μg/m3 (62) | 62.0 | |
| Oct. 16, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 ppb (4) | 0.57 ppb (7) | 56.0 μg/m3 (52) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 16, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 ppb (3) | 0.52 ppb (6) | 46.0 μg/m3 (43) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 16, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 49.0 μg/m3 (46) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 16, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 ppb (2) | 0.74 ppb (8) | 278.0 μg/m3 (163) | 48.0 μg/m3 (132) | 163.0 | |
| Oct. 16, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.81 ppb (10) | 72.0 μg/m3 (60) | 20.0 μg/m3 (68) | 68.0 | |
| Oct. 16, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.95 ppb (11) | 88.0 μg/m3 (68) | 29.0 μg/m3 (87) | 87.0 | |
| Oct. 16, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.99 ppb (12) | 74.0 μg/m3 (61) | 23.0 μg/m3 (74) | 74.0 | |
| Oct. 16, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.25 ppb (14) | 89.0 μg/m3 (68) | 27.0 μg/m3 (83) | 83.0 | |
| Oct. 16, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.27 ppb (15) | 93.0 μg/m3 (70) | 29.0 μg/m3 (87) | 87.0 | |
| Oct. 16, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.13 ppb (13) | 113.0 μg/m3 (80) | 21.0 μg/m3 (70) | 80.0 | |
| Oct. 16, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 1.33 ppb (15) | 114.0 μg/m3 (81) | 25.0 μg/m3 (79) | 81.0 | |
| Oct. 16, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.96 ppb (12) | 110.0 μg/m3 (79) | 25.0 μg/m3 (79) | 79.0 | |
| Oct. 16, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 9.0 ppb (9) | 0.76 ppb (10) | 112.0 μg/m3 (80) | 26.0 μg/m3 (81) | 81.0 | |
| Oct. 16, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 42.0 ppb (39) | 0.25 ppb (3) | 100.0 μg/m3 (74) | 12.0 μg/m3 (50) | 74.0 | |
| Oct. 16, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.11 ppb (2) | 77.0 μg/m3 (62) | 12.0 μg/m3 (50) | 62.0 | |
| Oct. 15, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (2) | 80.0 μg/m3 (64) | 11.0 μg/m3 (46) | 64.0 | |
| Oct. 15, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.09 ppb (2) | 78.0 μg/m3 (63) | 12.0 μg/m3 (50) | 63.0 | |
| Oct. 15, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (2) | 65.0 μg/m3 (56) | 8.0 μg/m3 (34) | 56.0 | |
| Oct. 15, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.08 ppb (2) | 74.0 μg/m3 (61) | 11.0 μg/m3 (46) | 61.0 | |
| Oct. 15, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.09 ppb (2) | 85.0 μg/m3 (66) | 13.0 μg/m3 (53) | 66.0 | |
| Oct. 15, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.14 ppb (2) | 95.0 μg/m3 (71) | 16.0 μg/m3 (60) | 71.0 | |
| Oct. 15, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (3) | 73.0 μg/m3 (60) | 14.0 μg/m3 (55) | 60.0 | |
| Oct. 15, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.19 ppb (3) | 73.0 μg/m3 (60) | 12.0 μg/m3 (50) | 60.0 | |
| Oct. 15, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.36 ppb (5) | 77.0 μg/m3 (62) | 14.0 μg/m3 (55) | 62.0 | |
| Oct. 15, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.38 ppb (5) | 68.0 μg/m3 (58) | 12.0 μg/m3 (50) | 58.0 | |
| Oct. 15, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.37 ppb (5) | 72.0 μg/m3 (60) | 13.0 μg/m3 (53) | 60.0 | |
| Oct. 15, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 83.0 μg/m3 (65) | 15.0 μg/m3 (58) | 65.0 | |
| Oct. 15, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.17 ppb (3) | 62.0 μg/m3 (55) | 11.0 μg/m3 (46) | 55.0 | |
| Oct. 15, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.19 ppb (3) | 77.0 μg/m3 (62) | 14.0 μg/m3 (55) | 62.0 | |
| Oct. 15, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.22 ppb (3) | 79.0 μg/m3 (63) | 16.0 μg/m3 (60) | 63.0 | |
| Oct. 15, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.31 ppb (4) | 70.0 μg/m3 (59) | 17.0 μg/m3 (62) | 62.0 | |
| Oct. 15, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.38 ppb (5) | 64.0 μg/m3 (56) | 14.0 μg/m3 (55) | 56.0 | |
| Oct. 15, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.4 ppb (5) | 44.0 μg/m3 (41) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 15, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.14 ppb (2) | 49.0 μg/m3 (46) | 8.0 μg/m3 (34) | 46.0 | |
| Oct. 15, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (3) | 61.0 μg/m3 (54) | 8.0 μg/m3 (34) | 54.0 | |
| Oct. 15, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.66 ppb (8) | 92.0 μg/m3 (70) | 16.0 μg/m3 (60) | 70.0 | |
| Oct. 15, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.55 ppb (7) | 76.0 μg/m3 (62) | 10.0 μg/m3 (42) | 62.0 | |
| Oct. 15, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.14 ppb (2) | 67.0 μg/m3 (57) | 7.0 μg/m3 (30) | 57.0 | |
| Oct. 15, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.06 ppb (2) | 78.0 μg/m3 (63) | 5.0 μg/m3 (21) | 63.0 | |
| Oct. 14, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.05 ppb (2) | 84.0 μg/m3 (66) | 7.0 μg/m3 (30) | 66.0 | |
| Oct. 14, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.05 ppb (2) | 63.0 μg/m3 (55) | 8.0 μg/m3 (34) | 55.0 | |
| Oct. 14, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.05 ppb (2) | 50.0 μg/m3 (47) | 5.0 μg/m3 (21) | 47.0 | |
| Oct. 14, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.05 ppb (2) | 41.0 μg/m3 (38) | 5.0 μg/m3 (21) | 38.0 | |
| Oct. 14, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.05 ppb (2) | 51.0 μg/m3 (48) | 6.0 μg/m3 (25) | 48.0 | |
| Oct. 14, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.07 ppb (2) | 51.0 μg/m3 (48) | 6.0 μg/m3 (25) | 48.0 | |
| Oct. 14, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.08 ppb (2) | 50.0 μg/m3 (47) | 9.0 μg/m3 (38) | 47.0 | |
| Oct. 14, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.09 ppb (2) | 55.0 μg/m3 (51) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 14, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.11 ppb (2) | 66.0 μg/m3 (57) | 10.0 μg/m3 (42) | 57.0 | |
| Oct. 14, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.14 ppb (2) | 34.0 μg/m3 (32) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 14, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (3) | 27.0 μg/m3 (25) | 8.0 μg/m3 (34) | 34.0 | |
| Oct. 14, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 30.0 μg/m3 (28) | 10.0 μg/m3 (42) | 42.0 | |
| Oct. 14, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.08 ppb (2) | 21.0 μg/m3 (20) | 7.0 μg/m3 (30) | 30.0 | |
| Oct. 14, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.07 ppb (2) | 20.0 μg/m3 (19) | 8.0 μg/m3 (34) | 34.0 | |
| Oct. 14, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.07 ppb (2) | 24.0 μg/m3 (23) | 5.0 μg/m3 (21) | 23.0 | |
| Oct. 14, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.07 ppb (2) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| Oct. 14, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.07 ppb (2) | 18.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| Oct. 14, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.09 ppb (2) | 16.0 μg/m3 (15) | 7.0 μg/m3 (30) | 30.0 | |
| Oct. 14, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.11 ppb (2) | 21.0 μg/m3 (20) | 10.0 μg/m3 (42) | 42.0 | |
| Oct. 14, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (2) | 26.0 μg/m3 (25) | 9.0 μg/m3 (38) | 38.0 | |
| Oct. 14, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 ppb (1) | 0.09 ppb (2) | 26.0 μg/m3 (25) | 8.0 μg/m3 (34) | 34.0 | |
| Oct. 14, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.09 ppb (2) | 59.0 μg/m3 (53) | 11.0 μg/m3 (46) | 53.0 | |
| Oct. 14, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 ppb (16) | 0.08 ppb (2) | 44.0 μg/m3 (41) | 11.0 μg/m3 (46) | 46.0 | |
| Oct. 14, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | 39.0 ppb (37) | 0.07 ppb (2) | 57.0 μg/m3 (52) | 7.0 μg/m3 (30) | 52.0 | |
| Oct. 13, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.06 ppb (2) | 52.0 μg/m3 (49) | 7.0 μg/m3 (30) | 49.0 | |
| Oct. 13, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 40.0 ppb (38) | 0.05 ppb (2) | 64.0 μg/m3 (56) | 7.0 μg/m3 (30) | 56.0 | |
| Oct. 13, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 41.0 ppb (38) | 0.04 ppb (0) | 55.0 μg/m3 (51) | 8.0 μg/m3 (34) | 51.0 | |
| Oct. 13, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.06 ppb (2) | 71.0 μg/m3 (59) | 7.0 μg/m3 (30) | 59.0 | |
| Oct. 13, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.06 ppb (2) | 72.0 μg/m3 (60) | 9.0 μg/m3 (38) | 60.0 | |
| Oct. 13, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (2) | 71.0 μg/m3 (59) | 14.0 μg/m3 (55) | 59.0 | |
| Oct. 13, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.12 ppb (2) | 64.0 μg/m3 (56) | 10.0 μg/m3 (42) | 56.0 | |
| Oct. 13, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.14 ppb (2) | 78.0 μg/m3 (63) | 11.0 μg/m3 (46) | 63.0 | |
| Oct. 13, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.18 ppb (3) | 72.0 μg/m3 (60) | 15.0 μg/m3 (58) | 60.0 | |
| Oct. 13, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.25 ppb (3) | 65.0 μg/m3 (56) | 13.0 μg/m3 (53) | 56.0 | |
| Oct. 13, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.24 ppb (3) | 71.0 μg/m3 (59) | 10.0 μg/m3 (42) | 59.0 | |
| Oct. 13, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 52.0 μg/m3 (49) | 11.0 μg/m3 (46) | 49.0 | |
| Oct. 13, 2021, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.11 ppb (2) | 52.0 μg/m3 (49) | 14.0 μg/m3 (55) | 55.0 | |
| Oct. 13, 2021, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (3) | 49.0 μg/m3 (46) | 17.0 μg/m3 (62) | 62.0 | |
| Oct. 13, 2021, 9 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.17 ppb (3) | 44.0 μg/m3 (41) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 13, 2021, 8 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.15 ppb (2) | 38.0 μg/m3 (36) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 13, 2021, 7 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.11 ppb (2) | 27.0 μg/m3 (25) | 9.0 μg/m3 (38) | 38.0 | |
| Oct. 13, 2021, 6 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.1 ppb (2) | 31.0 μg/m3 (29) | 12.0 μg/m3 (50) | 50.0 | |
| Oct. 13, 2021, 5 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.11 ppb (2) | 34.0 μg/m3 (32) | 8.0 μg/m3 (34) | 34.0 | |
| Oct. 13, 2021, 4 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.15 ppb (2) | 40.0 μg/m3 (38) | 13.0 μg/m3 (53) | 53.0 | |
| Oct. 13, 2021, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.16 ppb (3) | 55.0 μg/m3 (51) | 7.0 μg/m3 (30) | 51.0 | |
| Oct. 13, 2021, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.2 ppb (3) | 62.0 μg/m3 (55) | 11.0 μg/m3 (46) | 55.0 | |
| Oct. 13, 2021, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.06 ppb (2) | 51.0 μg/m3 (48) | 7.0 μg/m3 (30) | 48.0 | |
| Oct. 13, 2021, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.05 ppb (2) | 49.0 μg/m3 (46) | 8.0 μg/m3 (34) | 46.0 | |
| Oct. 12, 2021, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.04 ppb (0) | 50.0 μg/m3 (47) | 6.0 μg/m3 (25) | 47.0 | |
| Oct. 12, 2021, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.04 ppb (0) | 51.0 μg/m3 (48) | 8.0 μg/m3 (34) | 48.0 | |
| Oct. 12, 2021, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.04 ppb (0) | 42.0 μg/m3 (39) | 9.0 μg/m3 (38) | 39.0 | |
| Oct. 12, 2021, 8 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.03 ppb (0) | 54.0 μg/m3 (50) | 16.0 μg/m3 (60) | 60.0 | |
| Oct. 12, 2021, 7 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.03 ppb (0) | 56.0 μg/m3 (52) | 4.0 μg/m3 (17) | 52.0 | |
| Oct. 12, 2021, 6 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.03 ppb (0) | 71.0 μg/m3 (59) | 5.0 μg/m3 (21) | 59.0 | |
| Oct. 12, 2021, 5 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.04 ppb (0) | 73.0 μg/m3 (60) | 8.0 μg/m3 (34) | 60.0 | |
| Oct. 12, 2021, 4 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.04 ppb (0) | 61.0 μg/m3 (54) | 9.0 μg/m3 (38) | 54.0 | |
| Oct. 12, 2021, 3 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 23.0 ppb (22) | 0.05 ppb (2) | 59.0 μg/m3 (53) | 6.0 μg/m3 (25) | 53.0 | |
| Oct. 12, 2021, 2 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 ppb (13) | 0.04 ppb (0) | 35.0 μg/m3 (33) | 6.0 μg/m3 (25) | 33.0 | |
| Oct. 12, 2021, 1 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.03 ppb (0) | 31.0 μg/m3 (29) | 5.0 μg/m3 (21) | 29.0 | |
| Oct. 12, 2021, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 25.0 μg/m3 (24) | 2.0 μg/m3 (9) | 24.0 |