San Jose (Downtown) CA, US: 37.3483, -121.8947
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 2, 2020, 4 a.m. | 3.9 ppb (4) | 0.3 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (25) | 0.19 ppb (2) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| April 2, 2020, 3 a.m. | 6.2 ppb (6) | 0.3 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 33.0 ppb (25) | 0.17 ppb (2) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| April 2, 2020, 2 a.m. | 3.6 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 36.0 ppb (28) | 0.17 ppb (2) | N/A | 4.0 μg/m3 (17) | 28.0 | |
| April 2, 2020, 1 a.m. | 1.9 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.16 ppb (2) | N/A | 6.0 μg/m3 (25) | 29.0 | |
| April 2, 2020, midnight | 2.0 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.16 ppb (2) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| April 1, 2020, 11 p.m. | 1.7 ppb (2) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 40.0 ppb (31) | 0.16 ppb (2) | N/A | 5.0 μg/m3 (21) | 31.0 | |
| April 1, 2020, 10 p.m. | 2.0 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (8) | 32.0 | |
| April 1, 2020, 9 p.m. | 1.9 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 32.0 | |
| April 1, 2020, 8 p.m. | 2.4 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 32.0 | |
| April 1, 2020, 7 p.m. | 2.6 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 32.0 | |
| April 1, 2020, 6 p.m. | 2.8 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.18 ppb (2) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| April 1, 2020, 5 p.m. | 3.4 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (29) | 0.18 ppb (2) | N/A | N/A | 29.0 | |
| April 1, 2020, 4 p.m. | 3.9 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (29) | 0.19 ppb (2) | N/A | 5.0 μg/m3 (21) | 29.0 | |
| April 1, 2020, 3 p.m. | 4.7 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (28) | 0.2 ppb (2) | N/A | 4.0 μg/m3 (17) | 28.0 | |
| April 1, 2020, 2 p.m. | 5.7 ppb (5) | 0.4 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 35.0 ppb (27) | 0.19 ppb (2) | N/A | 3.0 μg/m3 (12) | 27.0 | |
| April 1, 2020, 1 p.m. | 3.2 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (29) | 0.17 ppb (2) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| April 1, 2020, noon | 2.2 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.14 ppb (2) | N/A | 3.0 μg/m3 (12) | 31.0 | |
| April 1, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| April 1, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| April 1, 2020, 9 a.m. | 1.1 ppb (1) | 0.2 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 29.0 ppb (22) | 0.14 ppb (2) | N/A | 3.0 μg/m3 (12) | 22.0 | |
| April 1, 2020, 8 a.m. | 3.3 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 22.0 ppb (17) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 17.0 | |
| April 1, 2020, 7 a.m. | 2.1 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 24.0 ppb (18) | 0.14 ppb (2) | N/A | -1.0 μg/m3 (0) | 18.0 | |
| April 1, 2020, 6 a.m. | 1.9 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 24.0 ppb (18) | 0.14 ppb (2) | N/A | -2.0 μg/m3 (0) | 18.0 | |
| April 1, 2020, 5 a.m. | 1.5 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 23.0 ppb (18) | 0.14 ppb (2) | N/A | 0.0 μg/m3 (0) | 18.0 | |
| April 1, 2020, 4 a.m. | 2.2 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 25.0 ppb (19) | 0.14 ppb (2) | N/A | 0.0 μg/m3 (0) | 19.0 | |
| April 1, 2020, 3 a.m. | 1.9 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 28.0 ppb (22) | 0.15 ppb (2) | N/A | 1.0 μg/m3 (4) | 22.0 | |
| April 1, 2020, 2 a.m. | 2.1 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 28.0 ppb (22) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 22.0 | |
| April 1, 2020, 1 a.m. | 1.6 ppb (1) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 33.0 ppb (25) | 0.16 ppb (2) | N/A | 1.0 μg/m3 (4) | 25.0 | |
| April 1, 2020, midnight | 1.5 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 32.0 ppb (25) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 25.0 | |
| March 31, 2020, 11 p.m. | 1.5 ppb (1) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 35.0 ppb (27) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (8) | 27.0 | |
| March 31, 2020, 10 p.m. | 1.9 ppb (2) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 35.0 ppb (27) | 0.16 ppb (2) | N/A | 3.0 μg/m3 (12) | 27.0 | |
| March 31, 2020, 9 p.m. | 2.1 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.15 ppb (2) | N/A | 5.0 μg/m3 (21) | 28.0 | |
| March 31, 2020, 8 p.m. | 2.1 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.15 ppb (2) | N/A | 5.0 μg/m3 (21) | 27.0 | |
| March 31, 2020, 7 p.m. | 4.3 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 31.0 ppb (24) | 0.18 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 31, 2020, 6 p.m. | 5.4 ppb (5) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | N/A | 27.0 ppb (21) | 0.19 ppb (2) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 31, 2020, 5 p.m. | 7.0 ppb (6) | 2.3 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 23.0 ppb (18) | 0.2 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 31, 2020, 4 p.m. | 9.9 ppb (9) | 2.3 ppb (2) | N/A | 8.0 ppb (7) | N/A | N/A | 21.0 ppb (16) | 0.23 ppb (3) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 31, 2020, 3 p.m. | 23.7 ppb (22) | 7.1 ppb (7) | N/A | 17.0 ppb (16) | N/A | N/A | 10.0 ppb (8) | 0.3 ppb (3) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| March 31, 2020, 2 p.m. | 22.7 ppb (21) | 7.2 ppb (7) | N/A | 16.0 ppb (15) | N/A | N/A | 9.0 ppb (7) | 0.27 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 31, 2020, 1 p.m. | 12.3 ppb (11) | 0.6 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | 13.0 ppb (10) | 0.22 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 31, 2020, noon | 12.0 ppb (11) | 0.4 ppb (0) | N/A | 12.0 ppb (11) | N/A | N/A | 8.0 ppb (6) | 0.2 ppb (2) | N/A | 2.0 μg/m3 (8) | 11.0 | |
| March 31, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | N/A | |
| March 31, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | N/A | |
| March 31, 2020, 9 a.m. | 9.5 ppb (9) | 0.4 ppb (0) | N/A | 9.0 ppb (8) | N/A | N/A | 10.0 ppb (8) | 0.25 ppb (3) | N/A | 0.0 μg/m3 (0) | 9.0 | |
| March 31, 2020, 8 a.m. | 8.1 ppb (8) | 0.3 ppb (0) | N/A | 8.0 ppb (7) | N/A | N/A | 15.0 ppb (12) | 0.26 ppb (3) | N/A | 2.0 μg/m3 (8) | 12.0 | |
| March 31, 2020, 7 a.m. | 6.0 ppb (6) | 0.3 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 22.0 ppb (17) | 0.21 ppb (2) | N/A | 3.0 μg/m3 (12) | 17.0 | |
| March 31, 2020, 6 a.m. | 2.8 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 28.0 ppb (22) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 22.0 | |
| March 31, 2020, 5 a.m. | 2.1 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 30.0 ppb (23) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 23.0 | |
| March 31, 2020, 4 a.m. | 2.0 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 32.0 ppb (25) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 25.0 | |
| March 31, 2020, 3 a.m. | 1.7 ppb (2) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 32.0 ppb (25) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 25.0 | |
| March 31, 2020, 2 a.m. | 1.6 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 33.0 ppb (25) | 0.16 ppb (2) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| March 31, 2020, 1 a.m. | 1.5 ppb (1) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 34.0 ppb (26) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 26.0 | |
| March 31, 2020, midnight | 1.8 ppb (2) | 0.5 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 36.0 ppb (28) | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 28.0 | |
| March 30, 2020, 11 p.m. | 2.2 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 32.0 | |
| March 30, 2020, 10 p.m. | 3.0 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 33.0 | |
| March 30, 2020, 9 p.m. | 3.8 ppb (4) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (31) | 0.18 ppb (2) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| March 30, 2020, 8 p.m. | 4.0 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 38.0 ppb (29) | 0.18 ppb (2) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| March 30, 2020, 7 p.m. | 4.5 ppb (4) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 35.0 ppb (27) | 0.18 ppb (2) | N/A | 6.0 μg/m3 (25) | 27.0 | |
| March 30, 2020, 6 p.m. | 4.4 ppb (4) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 34.0 ppb (26) | 0.18 ppb (2) | N/A | 3.0 μg/m3 (12) | 26.0 | |
| March 30, 2020, 5 p.m. | 3.5 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 33.0 ppb (25) | 0.18 ppb (2) | N/A | 1.0 μg/m3 (4) | 25.0 | |
| March 30, 2020, 4 p.m. | 3.9 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 31.0 ppb (24) | 0.18 ppb (2) | N/A | 3.0 μg/m3 (12) | 24.0 | |
| March 30, 2020, 3 p.m. | 8.0 ppb (7) | 1.4 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 26.0 ppb (20) | 0.22 ppb (2) | N/A | 3.0 μg/m3 (12) | 20.0 | |
| March 30, 2020, 2 p.m. | 19.1 ppb (18) | 2.6 ppb (2) | N/A | 17.0 ppb (16) | N/A | N/A | 10.0 ppb (8) | 0.29 ppb (3) | N/A | 2.0 μg/m3 (8) | 18.0 | |
| March 30, 2020, 1 p.m. | 11.4 ppb (11) | 0.6 ppb (1) | N/A | 11.0 ppb (10) | N/A | N/A | 11.0 ppb (8) | 0.25 ppb (3) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 30, 2020, noon | 8.1 ppb (8) | 0.7 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 12.0 ppb (9) | 0.23 ppb (3) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| March 30, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| March 30, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 30, 2020, 9 a.m. | 2.7 ppb (3) | 0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (25) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 25.0 | |
| March 30, 2020, 8 a.m. | 1.4 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 36.0 ppb (28) | 0.15 ppb (2) | N/A | 0.0 μg/m3 (0) | 28.0 | |
| March 30, 2020, 7 a.m. | 2.5 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 27.0 | |
| March 30, 2020, 6 a.m. | 1.8 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 29.0 | |
| March 30, 2020, 5 a.m. | 1.2 ppb (1) | 0.1 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 38.0 ppb (29) | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 29.0 | |
| March 30, 2020, 4 a.m. | 1.7 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 29.0 | |
| March 30, 2020, 3 a.m. | 2.4 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.19 ppb (2) | N/A | 4.0 μg/m3 (17) | 30.0 | |
| March 30, 2020, 2 a.m. | 2.0 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.19 ppb (2) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| March 30, 2020, 1 a.m. | 1.7 ppb (2) | 0.2 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.19 ppb (2) | N/A | 4.0 μg/m3 (17) | 32.0 | |
| March 30, 2020, midnight | 1.6 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (32) | 0.19 ppb (2) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| March 29, 2020, 11 p.m. | 1.7 ppb (2) | 0.4 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (32) | 0.19 ppb (2) | N/A | 4.0 μg/m3 (17) | 32.0 | |
| March 29, 2020, 10 p.m. | 1.6 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 43.0 ppb (33) | 0.17 ppb (2) | N/A | 1.0 μg/m3 (4) | 33.0 | |
| March 29, 2020, 9 p.m. | 1.2 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 43.0 ppb (33) | 0.18 ppb (2) | N/A | 3.0 μg/m3 (12) | 33.0 | |
| March 29, 2020, 8 p.m. | 2.6 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.19 ppb (2) | N/A | 3.0 μg/m3 (12) | 32.0 | |
| March 29, 2020, 7 p.m. | 2.7 ppb (3) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.18 ppb (2) | N/A | 1.0 μg/m3 (4) | 32.0 | |
| March 29, 2020, 6 p.m. | 2.3 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.18 ppb (2) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| March 29, 2020, 5 p.m. | 3.0 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.19 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 29, 2020, 4 p.m. | 4.6 ppb (4) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 37.0 ppb (28) | 0.19 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 29, 2020, 3 p.m. | 2.7 ppb (3) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 36.0 ppb (28) | 0.19 ppb (2) | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 29, 2020, 2 p.m. | 3.2 ppb (3) | 0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 33.0 ppb (25) | 0.19 ppb (2) | N/A | 2.0 μg/m3 (8) | 25.0 | |
| March 29, 2020, 1 p.m. | 2.4 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 30.0 ppb (23) | 0.2 ppb (2) | N/A | 4.0 μg/m3 (17) | 23.0 | |
| March 29, 2020, noon | 2.3 ppb (2) | 0.1 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 27.0 ppb (21) | 0.19 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 29, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 29, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 29, 2020, 9 a.m. | 4.9 ppb (5) | 0.1 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 21.0 ppb (16) | 0.25 ppb (3) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 8 a.m. | 6.0 ppb (6) | 0.2 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 18.0 ppb (14) | 0.27 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 7 a.m. | 4.9 ppb (5) | 0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 20.0 ppb (15) | 0.28 ppb (3) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 6 a.m. | 9.7 ppb (9) | 0.3 ppb (0) | N/A | 9.0 ppb (8) | N/A | N/A | 21.0 ppb (16) | 0.34 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| March 29, 2020, 5 a.m. | 9.0 ppb (8) | 0.2 ppb (0) | N/A | 9.0 ppb (8) | N/A | N/A | 27.0 ppb (21) | 0.34 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 4 a.m. | 8.2 ppb (8) | 0.2 ppb (0) | N/A | 8.0 ppb (7) | N/A | N/A | 29.0 ppb (22) | 0.32 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 3 a.m. | 7.9 ppb (7) | 0.2 ppb (0) | N/A | 8.0 ppb (7) | N/A | N/A | 31.0 ppb (24) | 0.33 ppb (4) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 2 a.m. | 4.5 ppb (4) | 0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 36.0 ppb (28) | 0.25 ppb (3) | N/A | 6.0 μg/m3 (25) | 28.0 | |
| March 29, 2020, 1 a.m. | 5.7 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 39.0 ppb (30) | 0.28 ppb (3) | N/A | 21.0 μg/m3 (69) | 69.0 | |
| March 29, 2020, midnight | 6.4 ppb (6) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 40.0 ppb (31) | 0.27 ppb (3) | N/A | 28.0 μg/m3 (84) | 84.0 | |
| March 28, 2020, 11 p.m. | 5.1 ppb (5) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 45.0 ppb (35) | 0.28 ppb (3) | N/A | 25.0 μg/m3 (78) | 78.0 | |
| March 28, 2020, 10 p.m. | 5.1 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 47.0 ppb (36) | 0.27 ppb (3) | N/A | 7.0 μg/m3 (29) | 36.0 | |
| March 28, 2020, 9 p.m. | 2.8 ppb (3) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 49.0 ppb (38) | 0.22 ppb (2) | N/A | 6.0 μg/m3 (25) | 38.0 | |
| March 28, 2020, 8 p.m. | 3.5 ppb (3) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 49.0 ppb (38) | 0.22 ppb (2) | N/A | 19.0 μg/m3 (65) | 65.0 | |
| March 28, 2020, 7 p.m. | 2.3 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 48.0 ppb (37) | 0.21 ppb (2) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| March 28, 2020, 6 p.m. | 3.9 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (32) | 0.24 ppb (3) | N/A | 17.0 μg/m3 (61) | 61.0 | |
| March 28, 2020, 5 p.m. | 5.6 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 33.0 ppb (25) | 0.23 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2020, 4 p.m. | 11.5 ppb (11) | 3.4 ppb (3) | N/A | 8.0 ppb (7) | N/A | N/A | 29.0 ppb (22) | 0.24 ppb (3) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2020, 3 p.m. | 7.3 ppb (7) | 0.8 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 28.0 ppb (22) | 0.23 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 28, 2020, 2 p.m. | 9.0 ppb (8) | 0.5 ppb (0) | N/A | 9.0 ppb (8) | N/A | N/A | 26.0 ppb (20) | 0.23 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 28, 2020, 1 p.m. | 8.3 ppb (8) | 0.4 ppb (0) | N/A | 8.0 ppb (7) | N/A | N/A | 26.0 ppb (20) | 0.22 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2020, noon | 4.5 ppb (4) | 0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 29.0 ppb (22) | 0.21 ppb (2) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 28, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| March 28, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| March 28, 2020, 9 a.m. | 8.3 ppb (8) | 0.1 ppb (0) | N/A | 8.0 ppb (7) | N/A | N/A | 24.0 ppb (18) | 0.29 ppb (3) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 28, 2020, 8 a.m. | 14.0 ppb (13) | 0.5 ppb (0) | N/A | 14.0 ppb (13) | N/A | N/A | 20.0 ppb (15) | 0.29 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 28, 2020, 7 a.m. | 11.5 ppb (11) | 0.2 ppb (0) | N/A | 11.0 ppb (10) | N/A | N/A | 23.0 ppb (18) | 0.32 ppb (4) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 28, 2020, 6 a.m. | 16.8 ppb (16) | 0.4 ppb (0) | N/A | 17.0 ppb (16) | N/A | N/A | 19.0 ppb (15) | 0.42 ppb (5) | N/A | 15.0 μg/m3 (56) | 56.0 | |
| March 28, 2020, 5 a.m. | 16.1 ppb (15) | 0.3 ppb (0) | N/A | 16.0 ppb (15) | N/A | N/A | 24.0 ppb (18) | 0.4 ppb (4) | N/A | 13.0 μg/m3 (52) | 52.0 | |
| March 28, 2020, 4 a.m. | 7.3 ppb (7) | 0.2 ppb (0) | N/A | 7.0 ppb (6) | N/A | N/A | 38.0 ppb (29) | 0.27 ppb (3) | N/A | 12.0 μg/m3 (50) | 50.0 | |
| March 28, 2020, 3 a.m. | 5.3 ppb (5) | 0.2 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 44.0 ppb (34) | 0.22 ppb (2) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 28, 2020, 2 a.m. | 6.4 ppb (6) | 0.4 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | 44.0 ppb (34) | 0.2 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2020, 1 a.m. | 3.4 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 48.0 ppb (37) | 0.19 ppb (2) | N/A | 7.0 μg/m3 (29) | 37.0 | |
| March 28, 2020, midnight | 2.3 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 50.0 ppb (38) | 0.18 ppb (2) | N/A | 8.0 μg/m3 (33) | 38.0 | |
| March 27, 2020, 11 p.m. | 1.7 ppb (2) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 49.0 ppb (38) | 0.18 ppb (2) | N/A | 11.0 μg/m3 (46) | 46.0 | |
| March 27, 2020, 10 p.m. | 1.6 ppb (1) | 0.3 ppb (0) | N/A | 1.0 ppb (1) | N/A | N/A | 51.0 ppb (39) | 0.17 ppb (2) | N/A | 9.0 μg/m3 (38) | 39.0 | |
| March 27, 2020, 9 p.m. | 1.7 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 50.0 ppb (38) | 0.17 ppb (2) | N/A | 6.0 μg/m3 (25) | 38.0 | |
| March 27, 2020, 8 p.m. | 1.8 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 49.0 ppb (38) | 0.17 ppb (2) | N/A | 16.0 μg/m3 (59) | 59.0 | |
| March 27, 2020, 7 p.m. | 2.3 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 48.0 ppb (37) | 0.18 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 6 p.m. | 2.8 ppb (3) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 45.0 ppb (35) | 0.18 ppb (2) | N/A | 8.0 μg/m3 (33) | 35.0 | |
| March 27, 2020, 5 p.m. | 5.4 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 38.0 ppb (29) | 0.2 ppb (2) | N/A | 7.0 μg/m3 (29) | 29.0 | |
| March 27, 2020, 4 p.m. | 24.1 ppb (22) | 9.8 ppb (9) | N/A | 14.0 ppb (13) | N/A | N/A | 17.0 ppb (13) | 0.29 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 3 p.m. | 27.0 ppb (25) | 11.1 ppb (10) | N/A | 16.0 ppb (15) | N/A | N/A | 8.0 ppb (6) | 0.38 ppb (4) | N/A | 3.0 μg/m3 (12) | 25.0 | |
| March 27, 2020, 2 p.m. | 39.5 ppb (37) | 20.8 ppb (19) | N/A | 19.0 ppb (18) | N/A | N/A | 1.0 ppb (1) | 0.57 ppb (6) | N/A | 3.0 μg/m3 (12) | 37.0 | |
| March 27, 2020, 1 p.m. | 31.2 ppb (29) | 10.2 ppb (9) | N/A | 21.0 ppb (19) | N/A | N/A | 0.0 ppb (0) | 0.38 ppb (4) | N/A | 4.0 μg/m3 (17) | 29.0 | |
| March 27, 2020, noon | 19.6 ppb (18) | 4.1 ppb (4) | N/A | 16.0 ppb (15) | N/A | N/A | 5.0 ppb (4) | 0.3 ppb (3) | N/A | 4.0 μg/m3 (17) | 18.0 | |
| March 27, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| March 27, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 27, 2020, 9 a.m. | 8.3 ppb (8) | 0.3 ppb (0) | N/A | 8.0 ppb (7) | N/A | N/A | 16.0 ppb (12) | 0.22 ppb (2) | N/A | 1.0 μg/m3 (4) | 12.0 | |
| March 27, 2020, 8 a.m. | 11.4 ppb (11) | 0.4 ppb (0) | N/A | 11.0 ppb (10) | N/A | N/A | 12.0 ppb (9) | 0.27 ppb (3) | N/A | 2.0 μg/m3 (8) | 11.0 | |
| March 27, 2020, 7 a.m. | 14.0 ppb (13) | 0.3 ppb (0) | N/A | 14.0 ppb (13) | N/A | N/A | 13.0 ppb (10) | 0.28 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 27, 2020, 6 a.m. | 4.0 ppb (4) | 0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 30.0 ppb (23) | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 23.0 | |
| March 27, 2020, 5 a.m. | 3.2 ppb (3) | 0.1 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (25) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 25.0 | |
| March 27, 2020, 4 a.m. | 3.0 ppb (3) | 0.2 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (25) | 0.15 ppb (2) | N/A | 3.0 μg/m3 (12) | 25.0 | |
| March 27, 2020, 3 a.m. | 2.4 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.15 ppb (2) | N/A | 1.0 μg/m3 (4) | 27.0 | |
| March 27, 2020, 2 a.m. | 2.1 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 36.0 ppb (28) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 28.0 | |
| March 27, 2020, 1 a.m. | 2.2 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.16 ppb (2) | N/A | 3.0 μg/m3 (12) | 31.0 | |
| March 27, 2020, midnight | 2.4 ppb (2) | 0.4 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.15 ppb (2) | N/A | 2.0 μg/m3 (8) | 32.0 | |
| March 26, 2020, 11 p.m. | 2.1 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 33.0 | |
| March 26, 2020, 10 p.m. | 2.5 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.15 ppb (2) | N/A | 4.0 μg/m3 (17) | 32.0 | |
| March 26, 2020, 9 p.m. | 3.0 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.16 ppb (2) | N/A | 2.0 μg/m3 (8) | 30.0 | |
| March 26, 2020, 8 p.m. | 2.5 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.14 ppb (2) | N/A | 1.0 μg/m3 (4) | 30.0 | |
| March 26, 2020, 7 p.m. | 4.5 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 37.0 ppb (28) | 0.16 ppb (2) | N/A | 3.0 μg/m3 (12) | 28.0 | |
| March 26, 2020, 6 p.m. | 6.2 ppb (6) | 1.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 34.0 ppb (26) | 0.18 ppb (2) | N/A | 5.0 μg/m3 (21) | 26.0 | |
| March 26, 2020, 5 p.m. | 8.7 ppb (8) | 2.4 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 30.0 ppb (23) | 0.2 ppb (2) | N/A | 4.0 μg/m3 (17) | 23.0 | |
| March 26, 2020, 4 p.m. | 15.6 ppb (14) | 5.2 ppb (5) | N/A | 10.0 ppb (9) | N/A | N/A | 21.0 ppb (16) | 0.26 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| March 26, 2020, 3 p.m. | 22.9 ppb (21) | 8.3 ppb (8) | N/A | 15.0 ppb (14) | N/A | N/A | 12.0 ppb (9) | 0.3 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| March 26, 2020, 2 p.m. | 24.6 ppb (23) | 5.6 ppb (5) | N/A | 19.0 ppb (18) | N/A | N/A | 7.0 ppb (5) | 0.32 ppb (4) | N/A | 5.0 μg/m3 (21) | 23.0 | |
| March 26, 2020, 1 p.m. | 29.1 ppb (27) | 9.1 ppb (8) | N/A | 20.0 ppb (19) | N/A | N/A | 4.0 ppb (3) | 0.32 ppb (4) | N/A | 3.0 μg/m3 (12) | 27.0 | |
| March 26, 2020, noon | 16.5 ppb (15) | 1.2 ppb (1) | N/A | 15.0 ppb (14) | N/A | N/A | 6.0 ppb (5) | 0.28 ppb (3) | N/A | 3.0 μg/m3 (12) | 15.0 | |
| March 26, 2020, 11 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 26, 2020, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| March 26, 2020, 9 a.m. | 15.6 ppb (14) | 1.0 ppb (1) | N/A | 15.0 ppb (14) | N/A | N/A | 10.0 ppb (8) | 0.26 ppb (3) | N/A | 3.0 μg/m3 (12) | 14.0 | |
| March 26, 2020, 8 a.m. | 12.4 ppb (11) | 0.5 ppb (0) | N/A | 12.0 ppb (11) | N/A | N/A | 16.0 ppb (12) | 0.26 ppb (3) | N/A | 2.0 μg/m3 (8) | 12.0 | |
| March 26, 2020, 7 a.m. | 15.4 ppb (14) | 0.3 ppb (0) | N/A | 15.0 ppb (14) | N/A | N/A | 14.0 ppb (11) | 0.27 ppb (3) | N/A | 3.0 μg/m3 (12) | 14.0 | |
| March 26, 2020, 6 a.m. | 13.1 ppb (12) | 0.3 ppb (0) | N/A | 13.0 ppb (12) | N/A | N/A | 21.0 ppb (16) | 0.24 ppb (3) | N/A | 2.0 μg/m3 (8) | 16.0 | |
| March 26, 2020, 5 a.m. | 10.1 ppb (9) | 0.3 ppb (0) | N/A | 10.0 ppb (9) | N/A | N/A | 27.0 ppb (21) | 0.22 ppb (2) | N/A | 1.0 μg/m3 (4) | 21.0 |