Santa Maria (N Santa Maria) CA, US: 34.942872, -120.435611
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 3, 2020, 4 p.m. | 7.2 ppb (7) | 2.6 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 28.0 ppb (22) | 0.15 ppb (2) | 24.0 μg/m3 (22) | 5.0 μg/m3 (21) | 22.0 | |
| April 3, 2020, 3 p.m. | 17.8 ppb (16) | 6.8 ppb (6) | N/A | 11.0 ppb (10) | N/A | N/A | 18.0 ppb (14) | 0.24 ppb (3) | 38.0 μg/m3 (35) | 8.0 μg/m3 (33) | 35.0 | |
| April 3, 2020, 2 p.m. | 39.2 ppb (36) | 18.0 ppb (17) | N/A | 21.0 ppb (19) | N/A | N/A | 5.0 ppb (4) | 0.44 ppb (5) | 42.0 μg/m3 (38) | 7.0 μg/m3 (29) | 38.0 | |
| April 3, 2020, 1 p.m. | 27.4 ppb (25) | 8.9 ppb (8) | N/A | 19.0 ppb (18) | N/A | N/A | 3.0 ppb (2) | 0.34 ppb (4) | 22.0 μg/m3 (20) | 0.0 μg/m3 (0) | 25.0 | |
| April 3, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (15) | 1.0 μg/m3 (4) | 15.0 | |
| April 3, 2020, 11 a.m. | 5.9 ppb (5) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 21.0 ppb (16) | 0.12 ppb (1) | 20.0 μg/m3 (18) | N/A | 18.0 | |
| April 3, 2020, 10 a.m. | 6.3 ppb (6) | 0.7 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 18.0 ppb (14) | 0.12 ppb (1) | 13.0 μg/m3 (12) | 3.0 μg/m3 (12) | 14.0 | |
| April 3, 2020, 9 a.m. | 5.8 ppb (5) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 17.0 ppb (13) | 0.13 ppb (1) | 13.0 μg/m3 (12) | 3.0 μg/m3 (12) | 13.0 | |
| April 3, 2020, 8 a.m. | 4.6 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 21.0 ppb (16) | 0.18 ppb (2) | 22.0 μg/m3 (20) | 3.0 μg/m3 (12) | 20.0 | |
| April 3, 2020, 7 a.m. | 4.7 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 22.0 ppb (17) | 0.13 ppb (1) | 22.0 μg/m3 (20) | 4.0 μg/m3 (17) | 20.0 | |
| April 3, 2020, 6 a.m. | 6.4 ppb (6) | 1.4 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 22.0 ppb (17) | 0.13 ppb (1) | 23.0 μg/m3 (21) | 5.0 μg/m3 (21) | 21.0 | |
| April 3, 2020, 5 a.m. | 5.9 ppb (5) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 24.0 ppb (18) | 0.15 ppb (2) | 25.0 μg/m3 (23) | 5.0 μg/m3 (21) | 23.0 | |
| April 3, 2020, 4 a.m. | 6.1 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 25.0 ppb (19) | 0.14 ppb (2) | 28.0 μg/m3 (25) | 6.0 μg/m3 (25) | 25.0 | |
| April 3, 2020, 3 a.m. | 5.0 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 29.0 ppb (22) | 0.13 ppb (1) | 30.0 μg/m3 (27) | 4.0 μg/m3 (17) | 27.0 | |
| April 3, 2020, 2 a.m. | 4.9 ppb (5) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 31.0 ppb (24) | 0.14 ppb (2) | 30.0 μg/m3 (27) | 6.0 μg/m3 (25) | 27.0 | |
| April 3, 2020, 1 a.m. | 2.8 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.13 ppb (1) | 42.0 μg/m3 (38) | 9.0 μg/m3 (38) | 38.0 | |
| April 3, 2020, midnight | 2.6 ppb (2) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.13 ppb (1) | 81.0 μg/m3 (63) | 14.0 μg/m3 (54) | 63.0 | |
| April 2, 2020, 11 p.m. | 4.1 ppb (4) | 1.9 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.14 ppb (2) | 101.0 μg/m3 (73) | 15.0 μg/m3 (56) | 73.0 | |
| April 2, 2020, 10 p.m. | 4.0 ppb (4) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.13 ppb (1) | 84.0 μg/m3 (64) | 8.0 μg/m3 (33) | 64.0 | |
| April 2, 2020, 9 p.m. | 3.6 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.15 ppb (2) | 67.0 μg/m3 (56) | 6.0 μg/m3 (25) | 56.0 | |
| April 2, 2020, 8 p.m. | 3.5 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.15 ppb (2) | 34.0 μg/m3 (31) | 3.0 μg/m3 (12) | 31.0 | |
| April 2, 2020, 7 p.m. | 2.1 ppb (2) | 0.7 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (32) | 0.15 ppb (2) | 11.0 μg/m3 (10) | -2.0 μg/m3 (0) | 32.0 | |
| April 2, 2020, 6 p.m. | 2.2 ppb (2) | 0.9 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (32) | 0.14 ppb (2) | 14.0 μg/m3 (13) | -2.0 μg/m3 (0) | 32.0 | |
| April 2, 2020, 5 p.m. | 3.5 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.15 ppb (2) | 18.0 μg/m3 (16) | 0.0 μg/m3 (0) | 31.0 | |
| April 2, 2020, 4 p.m. | 8.3 ppb (8) | 3.0 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | 31.0 ppb (24) | 0.18 ppb (2) | 21.0 μg/m3 (19) | 6.0 μg/m3 (25) | 25.0 | |
| April 2, 2020, 3 p.m. | 30.7 ppb (28) | 16.6 ppb (15) | N/A | 14.0 ppb (13) | N/A | N/A | 10.0 ppb (8) | 0.33 ppb (4) | 48.0 μg/m3 (44) | 10.0 μg/m3 (42) | 44.0 | |
| April 2, 2020, 2 p.m. | 32.4 ppb (30) | 22.2 ppb (21) | N/A | 10.0 ppb (9) | N/A | N/A | 1.0 ppb (1) | 0.37 ppb (4) | 37.0 μg/m3 (34) | 7.0 μg/m3 (29) | 34.0 | |
| April 2, 2020, 1 p.m. | 19.2 ppb (18) | 9.4 ppb (9) | N/A | 10.0 ppb (9) | N/A | N/A | 0.0 ppb (0) | 0.26 ppb (3) | 22.0 μg/m3 (20) | 2.0 μg/m3 (8) | 20.0 | |
| April 2, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (15) | 3.0 μg/m3 (12) | 15.0 | |
| April 2, 2020, 11 a.m. | 6.9 ppb (6) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 7.0 ppb (5) | 0.11 ppb (1) | 11.0 μg/m3 (10) | 3.0 μg/m3 (12) | 12.0 | |
| April 2, 2020, 10 a.m. | 4.3 ppb (4) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 9.0 ppb (7) | 0.12 ppb (1) | 17.0 μg/m3 (15) | 4.0 μg/m3 (17) | 17.0 | |
| April 2, 2020, 9 a.m. | 2.2 ppb (2) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 15.0 ppb (12) | 0.1 ppb (1) | 20.0 μg/m3 (18) | 4.0 μg/m3 (17) | 18.0 | |
| April 2, 2020, 8 a.m. | 4.0 ppb (4) | 0.5 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 16.0 ppb (12) | 0.13 ppb (1) | 23.0 μg/m3 (21) | 5.0 μg/m3 (21) | 21.0 | |
| April 2, 2020, 7 a.m. | 4.9 ppb (5) | 0.5 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 20.0 ppb (15) | 0.13 ppb (1) | 24.0 μg/m3 (22) | 6.0 μg/m3 (25) | 25.0 | |
| April 2, 2020, 6 a.m. | 4.2 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 29.0 ppb (22) | 0.13 ppb (1) | 31.0 μg/m3 (28) | 9.0 μg/m3 (38) | 38.0 | |
| April 2, 2020, 5 a.m. | 6.2 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 28.0 ppb (22) | 0.13 ppb (1) | 33.0 μg/m3 (30) | 6.0 μg/m3 (25) | 30.0 | |
| April 2, 2020, 4 a.m. | 4.0 ppb (4) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 31.0 ppb (24) | 0.13 ppb (1) | 39.0 μg/m3 (35) | 9.0 μg/m3 (38) | 38.0 | |
| April 2, 2020, 3 a.m. | 4.6 ppb (4) | 0.8 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 31.0 ppb (24) | 0.13 ppb (1) | 44.0 μg/m3 (40) | 11.0 μg/m3 (46) | 46.0 | |
| April 2, 2020, 2 a.m. | 3.1 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.13 ppb (1) | 53.0 μg/m3 (48) | 14.0 μg/m3 (54) | 54.0 | |
| April 2, 2020, 1 a.m. | 2.6 ppb (2) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.13 ppb (1) | 61.0 μg/m3 (53) | 15.0 μg/m3 (56) | 56.0 | |
| April 2, 2020, midnight | 3.7 ppb (3) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.13 ppb (1) | 69.0 μg/m3 (57) | 11.0 μg/m3 (46) | 57.0 | |
| April 1, 2020, 11 p.m. | 3.6 ppb (3) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.13 ppb (1) | 85.0 μg/m3 (65) | 17.0 μg/m3 (61) | 65.0 | |
| April 1, 2020, 10 p.m. | 3.3 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.13 ppb (1) | 85.0 μg/m3 (65) | 18.0 μg/m3 (63) | 65.0 | |
| April 1, 2020, 9 p.m. | 3.8 ppb (4) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.13 ppb (1) | 85.0 μg/m3 (65) | 13.0 μg/m3 (52) | 65.0 | |
| April 1, 2020, 8 p.m. | 3.4 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 36.0 ppb (28) | 0.13 ppb (1) | 56.0 μg/m3 (50) | 8.0 μg/m3 (33) | 50.0 | |
| April 1, 2020, 7 p.m. | 3.6 ppb (3) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 34.0 ppb (26) | 0.12 ppb (1) | 49.0 μg/m3 (45) | 11.0 μg/m3 (46) | 46.0 | |
| April 1, 2020, 6 p.m. | 3.7 ppb (3) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 30.0 ppb (23) | 0.12 ppb (1) | 44.0 μg/m3 (40) | 1.0 μg/m3 (4) | 40.0 | |
| April 1, 2020, 5 p.m. | 4.5 ppb (4) | 2.0 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 24.0 ppb (18) | 0.13 ppb (1) | 16.0 μg/m3 (15) | 1.0 μg/m3 (4) | 18.0 | |
| April 1, 2020, 4 p.m. | 5.1 ppb (5) | 2.4 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 22.0 ppb (17) | 0.13 ppb (1) | 10.0 μg/m3 (9) | 0.0 μg/m3 (0) | 17.0 | |
| April 1, 2020, 3 p.m. | 9.3 ppb (9) | 4.1 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | 17.0 ppb (13) | 0.14 ppb (2) | 16.0 μg/m3 (15) | 3.0 μg/m3 (12) | 15.0 | |
| April 1, 2020, 2 p.m. | 9.1 ppb (8) | 2.5 ppb (2) | N/A | 7.0 ppb (6) | N/A | N/A | 14.0 ppb (11) | 0.16 ppb (2) | 19.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| April 1, 2020, 1 p.m. | 9.4 ppb (9) | 2.5 ppb (2) | N/A | 7.0 ppb (6) | N/A | N/A | 14.0 ppb (11) | 0.22 ppb (2) | 24.0 μg/m3 (22) | 4.0 μg/m3 (17) | 22.0 | |
| April 1, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 15.0 μg/m3 (14) | 2.0 μg/m3 (8) | 14.0 | |
| April 1, 2020, 11 a.m. | 2.3 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 20.0 ppb (15) | 0.09 ppb (1) | 23.0 μg/m3 (21) | 3.0 μg/m3 (12) | 21.0 | |
| April 1, 2020, 10 a.m. | 2.1 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 21.0 ppb (16) | 0.09 ppb (1) | 23.0 μg/m3 (21) | 5.0 μg/m3 (21) | 21.0 | |
| April 1, 2020, 9 a.m. | 2.0 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 21.0 ppb (16) | 0.09 ppb (1) | 24.0 μg/m3 (22) | 5.0 μg/m3 (21) | 22.0 | |
| April 1, 2020, 8 a.m. | 2.5 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 21.0 ppb (16) | 0.09 ppb (1) | 24.0 μg/m3 (22) | 5.0 μg/m3 (21) | 22.0 | |
| April 1, 2020, 7 a.m. | 2.4 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 20.0 ppb (15) | 0.1 ppb (1) | 22.0 μg/m3 (20) | 3.0 μg/m3 (12) | 20.0 | |
| April 1, 2020, 6 a.m. | 2.9 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 21.0 ppb (16) | 0.09 ppb (1) | 21.0 μg/m3 (19) | 5.0 μg/m3 (21) | 21.0 | |
| April 1, 2020, 5 a.m. | 3.2 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 20.0 ppb (15) | 0.1 ppb (1) | 22.0 μg/m3 (20) | 3.0 μg/m3 (12) | 20.0 | |
| April 1, 2020, 4 a.m. | 3.8 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 21.0 ppb (16) | 0.09 ppb (1) | 21.0 μg/m3 (19) | 3.0 μg/m3 (12) | 19.0 | |
| April 1, 2020, 3 a.m. | 3.8 ppb (4) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 22.0 ppb (17) | 0.1 ppb (1) | 24.0 μg/m3 (22) | 5.0 μg/m3 (21) | 22.0 | |
| April 1, 2020, 2 a.m. | 4.0 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 24.0 ppb (18) | 0.12 ppb (1) | 25.0 μg/m3 (23) | 5.0 μg/m3 (21) | 23.0 | |
| April 1, 2020, 1 a.m. | 4.4 ppb (4) | 1.7 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 26.0 ppb (20) | 0.12 ppb (1) | 34.0 μg/m3 (31) | 6.0 μg/m3 (25) | 31.0 | |
| April 1, 2020, midnight | 4.2 ppb (4) | 1.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 29.0 ppb (22) | 0.12 ppb (1) | 48.0 μg/m3 (44) | 7.0 μg/m3 (29) | 44.0 | |
| March 31, 2020, 11 p.m. | 4.2 ppb (4) | 1.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 34.0 ppb (26) | 0.13 ppb (1) | 30.0 μg/m3 (27) | 2.0 μg/m3 (8) | 27.0 | |
| March 31, 2020, 10 p.m. | 2.9 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.14 ppb (2) | 6.0 μg/m3 (5) | 1.0 μg/m3 (4) | 28.0 | |
| March 31, 2020, 9 p.m. | 2.5 ppb (2) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.13 ppb (1) | 6.0 μg/m3 (5) | -2.0 μg/m3 (0) | 28.0 | |
| March 31, 2020, 8 p.m. | 3.2 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.14 ppb (2) | 10.0 μg/m3 (9) | 0.0 μg/m3 (0) | 28.0 | |
| March 31, 2020, 7 p.m. | 2.8 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 38.0 ppb (29) | 0.15 ppb (2) | 11.0 μg/m3 (10) | 2.0 μg/m3 (8) | 29.0 | |
| March 31, 2020, 6 p.m. | 3.0 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.13 ppb (1) | 12.0 μg/m3 (11) | 3.0 μg/m3 (12) | 30.0 | |
| March 31, 2020, 5 p.m. | 2.1 ppb (2) | 0.5 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.13 ppb (1) | 27.0 μg/m3 (25) | 4.0 μg/m3 (17) | 31.0 | |
| March 31, 2020, 4 p.m. | 3.8 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (31) | 0.14 ppb (2) | 20.0 μg/m3 (18) | 5.0 μg/m3 (21) | 31.0 | |
| March 31, 2020, 3 p.m. | 3.2 ppb (3) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.14 ppb (2) | 17.0 μg/m3 (15) | N/A | 30.0 | |
| March 31, 2020, 2 p.m. | 6.6 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | 36.0 ppb (28) | 0.17 ppb (2) | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 31, 2020, 1 p.m. | 5.3 ppb (5) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 39.0 ppb (30) | 0.21 ppb (2) | 13.0 μg/m3 (12) | 7.0 μg/m3 (29) | 30.0 | |
| March 31, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 31, 2020, 11 a.m. | 2.2 ppb (2) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 6.0 μg/m3 (25) | 32.0 | |
| March 31, 2020, 10 a.m. | 3.4 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 40.0 ppb (31) | 0.13 ppb (1) | 10.0 μg/m3 (9) | 4.0 μg/m3 (17) | 31.0 | |
| March 31, 2020, 9 a.m. | 4.1 ppb (4) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 27.0 ppb (21) | 0.12 ppb (1) | 9.0 μg/m3 (8) | 1.0 μg/m3 (4) | 21.0 | |
| March 31, 2020, 8 a.m. | 4.4 ppb (4) | 0.4 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | 18.0 ppb (14) | 0.11 ppb (1) | 11.0 μg/m3 (10) | 2.0 μg/m3 (8) | 14.0 | |
| March 31, 2020, 7 a.m. | 4.9 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 19.0 ppb (15) | 0.12 ppb (1) | 12.0 μg/m3 (11) | 4.0 μg/m3 (17) | 17.0 | |
| March 31, 2020, 6 a.m. | 4.0 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 22.0 ppb (17) | 0.14 ppb (2) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 21.0 | |
| March 31, 2020, 5 a.m. | 4.8 ppb (4) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 22.0 ppb (17) | 0.12 ppb (1) | 15.0 μg/m3 (14) | 2.0 μg/m3 (8) | 17.0 | |
| March 31, 2020, 4 a.m. | 4.8 ppb (4) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 25.0 ppb (19) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 3.0 μg/m3 (12) | 19.0 | |
| March 31, 2020, 3 a.m. | 5.7 ppb (5) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 24.0 ppb (18) | 0.12 ppb (1) | 22.0 μg/m3 (20) | 4.0 μg/m3 (17) | 20.0 | |
| March 31, 2020, 2 a.m. | 4.7 ppb (4) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 29.0 ppb (22) | 0.13 ppb (1) | 19.0 μg/m3 (17) | 4.0 μg/m3 (17) | 22.0 | |
| March 31, 2020, 1 a.m. | 3.3 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 32.0 ppb (25) | 0.11 ppb (1) | 23.0 μg/m3 (21) | 6.0 μg/m3 (25) | 25.0 | |
| March 31, 2020, midnight | 3.6 ppb (3) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 32.0 ppb (25) | 0.12 ppb (1) | 38.0 μg/m3 (35) | 9.0 μg/m3 (38) | 38.0 | |
| March 30, 2020, 11 p.m. | 3.5 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (25) | 0.12 ppb (1) | 43.0 μg/m3 (39) | 7.0 μg/m3 (29) | 39.0 | |
| March 30, 2020, 10 p.m. | 4.0 ppb (4) | 2.0 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (25) | 0.12 ppb (1) | 36.0 μg/m3 (33) | 2.0 μg/m3 (8) | 33.0 | |
| March 30, 2020, 9 p.m. | 3.5 ppb (3) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 34.0 ppb (26) | 0.12 ppb (1) | 28.0 μg/m3 (25) | 3.0 μg/m3 (12) | 26.0 | |
| March 30, 2020, 8 p.m. | 3.8 ppb (4) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (25) | 0.13 ppb (1) | 22.0 μg/m3 (20) | 1.0 μg/m3 (4) | 25.0 | |
| March 30, 2020, 7 p.m. | 3.8 ppb (4) | 1.5 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (25) | 0.15 ppb (2) | 14.0 μg/m3 (13) | -1.0 μg/m3 (0) | 25.0 | |
| March 30, 2020, 6 p.m. | 6.8 ppb (6) | 3.0 ppb (3) | N/A | 4.0 ppb (4) | N/A | N/A | 28.0 ppb (22) | 0.14 ppb (2) | 16.0 μg/m3 (15) | 0.0 μg/m3 (0) | 22.0 | |
| March 30, 2020, 5 p.m. | 9.3 ppb (9) | 3.9 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | 21.0 ppb (16) | 0.17 ppb (2) | 16.0 μg/m3 (15) | 2.0 μg/m3 (8) | 16.0 | |
| March 30, 2020, 4 p.m. | 10.5 ppb (10) | 5.2 ppb (5) | N/A | 5.0 ppb (5) | N/A | N/A | 15.0 ppb (12) | 0.18 ppb (2) | 13.0 μg/m3 (12) | 2.0 μg/m3 (8) | 12.0 | |
| March 30, 2020, 3 p.m. | 12.6 ppb (12) | 6.5 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | 8.0 ppb (6) | 0.17 ppb (2) | 16.0 μg/m3 (15) | 2.0 μg/m3 (8) | 15.0 | |
| March 30, 2020, 2 p.m. | 13.9 ppb (13) | 6.2 ppb (6) | N/A | 8.0 ppb (7) | N/A | N/A | 5.0 ppb (4) | 0.16 ppb (2) | 19.0 μg/m3 (17) | 2.0 μg/m3 (8) | 17.0 | |
| March 30, 2020, 1 p.m. | 26.5 ppb (25) | 13.1 ppb (12) | N/A | 13.0 ppb (12) | N/A | N/A | 1.0 ppb (1) | 0.36 ppb (4) | 13.0 μg/m3 (12) | 2.0 μg/m3 (8) | 25.0 | |
| March 30, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (10) | -1.0 μg/m3 (0) | 10.0 | |
| March 30, 2020, 11 a.m. | 4.8 ppb (4) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 7.0 ppb (5) | 0.12 ppb (1) | 7.0 μg/m3 (6) | 0.0 μg/m3 (0) | 6.0 | |
| March 30, 2020, 10 a.m. | 5.3 ppb (5) | 0.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 10.0 ppb (8) | 0.13 ppb (1) | 4.0 μg/m3 (4) | 1.0 μg/m3 (4) | 8.0 | |
| March 30, 2020, 9 a.m. | 9.3 ppb (9) | 1.1 ppb (1) | N/A | 8.0 ppb (7) | N/A | N/A | 9.0 ppb (7) | 0.21 ppb (2) | 7.0 μg/m3 (6) | 1.0 μg/m3 (4) | 9.0 | |
| March 30, 2020, 8 a.m. | 7.1 ppb (7) | 0.6 ppb (1) | N/A | 7.0 ppb (6) | N/A | N/A | 12.0 ppb (9) | 0.19 ppb (2) | 12.0 μg/m3 (11) | 3.0 μg/m3 (12) | 12.0 | |
| March 30, 2020, 7 a.m. | 7.3 ppb (7) | 1.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 16.0 ppb (12) | 0.21 ppb (2) | 12.0 μg/m3 (11) | 5.0 μg/m3 (21) | 21.0 | |
| March 30, 2020, 6 a.m. | 5.6 ppb (5) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 19.0 ppb (15) | 0.22 ppb (2) | 11.0 μg/m3 (10) | 4.0 μg/m3 (17) | 17.0 | |
| March 30, 2020, 5 a.m. | 4.5 ppb (4) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 28.0 ppb (22) | 0.18 ppb (2) | 9.0 μg/m3 (8) | 2.0 μg/m3 (8) | 22.0 | |
| March 30, 2020, 4 a.m. | 4.9 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 29.0 ppb (22) | 0.16 ppb (2) | 10.0 μg/m3 (9) | 3.0 μg/m3 (12) | 22.0 | |
| March 30, 2020, 3 a.m. | 4.7 ppb (4) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 31.0 ppb (24) | 0.15 ppb (2) | 17.0 μg/m3 (15) | 5.0 μg/m3 (21) | 24.0 | |
| March 30, 2020, 2 a.m. | 3.4 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 35.0 ppb (27) | 0.14 ppb (2) | 12.0 μg/m3 (11) | 4.0 μg/m3 (17) | 27.0 | |
| March 30, 2020, 1 a.m. | 2.1 ppb (2) | 0.8 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 39.0 ppb (30) | 0.13 ppb (1) | 6.0 μg/m3 (5) | 2.0 μg/m3 (8) | 30.0 | |
| March 30, 2020, midnight | 2.8 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.18 ppb (2) | 17.0 μg/m3 (15) | 3.0 μg/m3 (12) | 32.0 | |
| March 29, 2020, 11 p.m. | 2.4 ppb (2) | 1.0 ppb (1) | N/A | 1.0 ppb (1) | N/A | N/A | 41.0 ppb (32) | 0.13 ppb (1) | 9.0 μg/m3 (8) | 6.0 μg/m3 (25) | 32.0 | |
| March 29, 2020, 10 p.m. | 2.6 ppb (2) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.13 ppb (1) | 11.0 μg/m3 (10) | 6.0 μg/m3 (25) | 32.0 | |
| March 29, 2020, 9 p.m. | 3.3 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.15 ppb (2) | 14.0 μg/m3 (13) | 3.0 μg/m3 (12) | 32.0 | |
| March 29, 2020, 8 p.m. | 2.9 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.15 ppb (2) | 10.0 μg/m3 (9) | 5.0 μg/m3 (21) | 33.0 | |
| March 29, 2020, 7 p.m. | 2.8 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 45.0 ppb (35) | 0.14 ppb (2) | 10.0 μg/m3 (9) | 8.0 μg/m3 (33) | 35.0 | |
| March 29, 2020, 6 p.m. | 3.4 ppb (3) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 44.0 ppb (34) | 0.14 ppb (2) | 11.0 μg/m3 (10) | 7.0 μg/m3 (29) | 34.0 | |
| March 29, 2020, 5 p.m. | 3.4 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.14 ppb (2) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 30.0 | |
| March 29, 2020, 4 p.m. | 4.6 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (25) | 0.17 ppb (2) | 14.0 μg/m3 (13) | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 3 p.m. | 5.2 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 22.0 ppb (17) | 0.15 ppb (2) | 20.0 μg/m3 (18) | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 2 p.m. | 6.7 ppb (6) | 0.8 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 15.0 ppb (12) | 0.16 ppb (2) | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 1 p.m. | 10.1 ppb (9) | 1.2 ppb (1) | N/A | 9.0 ppb (8) | N/A | N/A | 13.0 ppb (10) | 0.2 ppb (2) | 21.0 μg/m3 (19) | 10.0 μg/m3 (42) | 42.0 | |
| March 29, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 21.0 μg/m3 (19) | 10.0 μg/m3 (42) | 42.0 | |
| March 29, 2020, 11 a.m. | 3.4 ppb (3) | 0.8 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 23.0 ppb (18) | 0.14 ppb (2) | 14.0 μg/m3 (13) | 6.0 μg/m3 (25) | 25.0 | |
| March 29, 2020, 10 a.m. | 3.7 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 22.0 ppb (17) | 0.15 ppb (2) | 18.0 μg/m3 (16) | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 9 a.m. | 5.1 ppb (5) | 0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | 22.0 ppb (17) | 0.17 ppb (2) | 19.0 μg/m3 (17) | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 8 a.m. | 3.1 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 33.0 ppb (25) | 0.16 ppb (2) | 22.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 7 a.m. | 5.1 ppb (5) | 1.9 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 36.0 ppb (28) | 0.16 ppb (2) | 16.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 29, 2020, 6 a.m. | 4.0 ppb (4) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 35.0 ppb (27) | 0.16 ppb (2) | 23.0 μg/m3 (21) | 8.0 μg/m3 (33) | 33.0 | |
| March 29, 2020, 5 a.m. | 3.0 ppb (3) | 0.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.15 ppb (2) | 24.0 μg/m3 (22) | 9.0 μg/m3 (38) | 38.0 | |
| March 29, 2020, 4 a.m. | 4.9 ppb (5) | 1.7 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 40.0 ppb (31) | 0.18 ppb (2) | 25.0 μg/m3 (23) | 6.0 μg/m3 (25) | 31.0 | |
| March 29, 2020, 3 a.m. | 3.7 ppb (3) | 0.9 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (32) | 0.18 ppb (2) | 24.0 μg/m3 (22) | 8.0 μg/m3 (33) | 33.0 | |
| March 29, 2020, 2 a.m. | 4.7 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 39.0 ppb (30) | 0.23 ppb (3) | 43.0 μg/m3 (39) | 13.0 μg/m3 (52) | 52.0 | |
| March 29, 2020, 1 a.m. | 2.5 ppb (2) | 0.8 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.17 ppb (2) | 28.0 μg/m3 (25) | 7.0 μg/m3 (29) | 32.0 | |
| March 29, 2020, midnight | 2.8 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.17 ppb (2) | 28.0 μg/m3 (25) | 7.0 μg/m3 (29) | 33.0 | |
| March 28, 2020, 11 p.m. | 3.0 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.17 ppb (2) | 37.0 μg/m3 (34) | 7.0 μg/m3 (29) | 34.0 | |
| March 28, 2020, 10 p.m. | 3.3 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.16 ppb (2) | 27.0 μg/m3 (25) | 6.0 μg/m3 (25) | 32.0 | |
| March 28, 2020, 9 p.m. | 3.6 ppb (3) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 42.0 ppb (32) | 0.15 ppb (2) | 23.0 μg/m3 (21) | 7.0 μg/m3 (29) | 32.0 | |
| March 28, 2020, 8 p.m. | 3.5 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.16 ppb (2) | 17.0 μg/m3 (15) | 5.0 μg/m3 (21) | 32.0 | |
| March 28, 2020, 7 p.m. | 4.1 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 39.0 ppb (30) | 0.16 ppb (2) | 20.0 μg/m3 (18) | 3.0 μg/m3 (12) | 30.0 | |
| March 28, 2020, 6 p.m. | 5.1 ppb (5) | 1.9 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 35.0 ppb (27) | 0.16 ppb (2) | 15.0 μg/m3 (14) | 3.0 μg/m3 (12) | 27.0 | |
| March 28, 2020, 5 p.m. | 7.6 ppb (7) | 2.9 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | 28.0 ppb (22) | 0.17 ppb (2) | 21.0 μg/m3 (19) | 2.0 μg/m3 (8) | 22.0 | |
| March 28, 2020, 4 p.m. | 10.3 ppb (10) | 4.8 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | 18.0 ppb (14) | 0.16 ppb (2) | 18.0 μg/m3 (16) | 3.0 μg/m3 (12) | 16.0 | |
| March 28, 2020, 3 p.m. | 10.0 ppb (9) | 4.7 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | 8.0 ppb (6) | 0.14 ppb (2) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 2 p.m. | 10.0 ppb (9) | 3.1 ppb (3) | N/A | 7.0 ppb (6) | N/A | N/A | 6.0 ppb (5) | 0.17 ppb (2) | 19.0 μg/m3 (17) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 1 p.m. | 7.1 ppb (7) | 1.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 9.0 ppb (7) | 0.17 ppb (2) | 12.0 μg/m3 (11) | 3.0 μg/m3 (12) | 12.0 | |
| March 28, 2020, noon | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (6) | 6.0 μg/m3 (25) | 25.0 | |
| March 28, 2020, 11 a.m. | 5.3 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 12.0 ppb (9) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 10 a.m. | 3.3 ppb (3) | 0.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 16.0 ppb (12) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 9 a.m. | 4.2 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 15.0 ppb (12) | 0.12 ppb (1) | 18.0 μg/m3 (16) | 6.0 μg/m3 (25) | 25.0 | |
| March 28, 2020, 8 a.m. | 3.8 ppb (4) | 0.5 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | 18.0 ppb (14) | 0.13 ppb (1) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| March 28, 2020, 7 a.m. | 4.1 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | 24.0 ppb (18) | 0.14 ppb (2) | 16.0 μg/m3 (15) | 5.0 μg/m3 (21) | 21.0 | |
| March 28, 2020, 6 a.m. | 6.9 ppb (6) | 0.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | 21.0 ppb (16) | 0.17 ppb (2) | 11.0 μg/m3 (10) | 7.0 μg/m3 (29) | 29.0 | |
| March 28, 2020, 5 a.m. | 10.9 ppb (10) | 1.2 ppb (1) | N/A | 10.0 ppb (9) | N/A | N/A | 26.0 ppb (20) | 0.27 ppb (3) | 24.0 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2020, 4 a.m. | 6.4 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | 39.0 ppb (30) | 0.22 ppb (2) | 23.0 μg/m3 (21) | 10.0 μg/m3 (42) | 42.0 | |
| March 28, 2020, 3 a.m. | 7.5 ppb (7) | 2.0 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | 38.0 ppb (29) | 0.18 ppb (2) | 35.0 μg/m3 (32) | 9.0 μg/m3 (38) | 38.0 | |
| March 28, 2020, 2 a.m. | 4.0 ppb (4) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | 42.0 ppb (32) | 0.19 ppb (2) | 40.0 μg/m3 (36) | 6.0 μg/m3 (25) | 36.0 | |
| March 28, 2020, 1 a.m. | 3.0 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 46.0 ppb (35) | 0.15 ppb (2) | 30.0 μg/m3 (27) | 7.0 μg/m3 (29) | 35.0 | |
| March 28, 2020, midnight | 3.4 ppb (3) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 44.0 ppb (34) | 0.14 ppb (2) | 32.0 μg/m3 (29) | 6.0 μg/m3 (25) | 34.0 | |
| March 27, 2020, 11 p.m. | 3.9 ppb (4) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 43.0 ppb (33) | 0.15 ppb (2) | 41.0 μg/m3 (37) | 9.0 μg/m3 (38) | 38.0 | |
| March 27, 2020, 10 p.m. | 4.0 ppb (4) | 1.7 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 41.0 ppb (32) | 0.15 ppb (2) | 39.0 μg/m3 (35) | 3.0 μg/m3 (12) | 35.0 | |
| March 27, 2020, 9 p.m. | 4.0 ppb (4) | 1.8 ppb (2) | N/A | 2.0 ppb (2) | N/A | N/A | 39.0 ppb (30) | 0.14 ppb (2) | 26.0 μg/m3 (24) | 4.0 μg/m3 (17) | 30.0 | |
| March 27, 2020, 8 p.m. | 3.2 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.13 ppb (1) | 27.0 μg/m3 (25) | 6.0 μg/m3 (25) | 28.0 | |
| March 27, 2020, 7 p.m. | 3.5 ppb (3) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | 37.0 ppb (28) | 0.14 ppb (2) | 21.0 μg/m3 (19) | 3.0 μg/m3 (12) | 28.0 | |
| March 27, 2020, 6 p.m. | 5.0 ppb (5) | 2.3 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 35.0 ppb (27) | 0.14 ppb (2) | 16.0 μg/m3 (15) | 3.0 μg/m3 (12) | 27.0 | |
| March 27, 2020, 5 p.m. | 5.7 ppb (5) | 2.4 ppb (2) | N/A | 3.0 ppb (3) | N/A | N/A | 32.0 ppb (25) | 0.18 ppb (2) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 25.0 |