LA (Chavez Ravine Place) CA, US: 34.0669, -118.2417
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 25, 2019, 8 a.m. | 18.7 ppb (17) | 0.8 ppb (1) | 17.1 ppb (16) | 18.0 ppb (17) | 16.7 ppb (15) | 0.0 ppb (0) | 14.0 ppb (11) | 0.4 ppb (4) | 27.0 μg/m3 (25) | 15.0 μg/m3 (56) | 56.0 | |
| March 25, 2019, 7 a.m. | 13.5 ppb (12) | 0.5 ppb (0) | 16.1 ppb (15) | 13.0 ppb (12) | 14.9 ppb (14) | 0.0 ppb (0) | 21.0 ppb (16) | 0.45 ppb (5) | 28.0 μg/m3 (25) | 16.0 μg/m3 (59) | 59.0 | |
| March 25, 2019, 6 a.m. | 16.8 ppb (16) | 0.9 ppb (1) | 14.5 ppb (13) | 16.0 ppb (15) | 14.2 ppb (13) | 0.0 ppb (0) | 21.0 ppb (16) | 0.5 ppb (6) | 22.0 μg/m3 (20) | 12.0 μg/m3 (50) | 50.0 | |
| March 25, 2019, 5 a.m. | 15.1 ppb (14) | 0.4 ppb (0) | 14.3 ppb (13) | 15.0 ppb (14) | 14.2 ppb (13) | 0.0 ppb (0) | 23.0 ppb (18) | 0.4 ppb (4) | 26.0 μg/m3 (24) | 11.0 μg/m3 (46) | 46.0 | |
| March 25, 2019, 4 a.m. | 6.2 ppb (6) | 0.0 ppb (0) | 7.0 ppb (6) | 6.0 ppb (6) | 7.0 ppb (6) | 0.0 ppb (0) | 38.0 ppb (29) | 0.24 ppb (3) | 21.0 μg/m3 (19) | 13.0 μg/m3 (52) | 52.0 | |
| March 25, 2019, 3 a.m. | 6.0 ppb (6) | 0.0 ppb (0) | 6.6 ppb (6) | 6.0 ppb (6) | 6.6 ppb (6) | 0.0 ppb (0) | 40.0 ppb (31) | 0.21 ppb (2) | 20.0 μg/m3 (18) | 13.0 μg/m3 (52) | 52.0 | |
| March 25, 2019, 2 a.m. | 5.6 ppb (5) | -0.1 ppb (0) | 6.2 ppb (6) | 6.0 ppb (6) | 6.2 ppb (6) | 0.0 ppb (0) | 41.0 ppb (32) | 0.21 ppb (2) | 16.0 μg/m3 (15) | 9.0 μg/m3 (38) | 38.0 | |
| March 25, 2019, 1 a.m. | 6.3 ppb (6) | 0.0 ppb (0) | 7.1 ppb (7) | 6.0 ppb (6) | 6.9 ppb (6) | 0.0 ppb (0) | 49.0 ppb (38) | 0.24 ppb (3) | 29.0 μg/m3 (26) | 11.0 μg/m3 (46) | 46.0 | |
| March 25, 2019, midnight | 6.8 ppb (6) | 0.3 ppb (0) | 6.8 ppb (6) | 7.0 ppb (6) | 6.3 ppb (6) | 0.0 ppb (0) | 51.0 ppb (39) | 0.24 ppb (3) | 28.0 μg/m3 (25) | 16.0 μg/m3 (59) | 59.0 | |
| March 24, 2019, 11 p.m. | 6.9 ppb (6) | 0.5 ppb (0) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.24 ppb (3) | 25.0 μg/m3 (23) | 16.0 μg/m3 (59) | 59.0 | |
| March 24, 2019, 10 p.m. | 8.5 ppb (8) | 0.8 ppb (1) | 10.3 ppb (10) | 8.0 ppb (7) | 9.1 ppb (8) | 0.0 ppb (0) | 51.0 ppb (39) | 0.25 ppb (3) | 27.0 μg/m3 (25) | 17.0 μg/m3 (61) | 61.0 | |
| March 24, 2019, 9 p.m. | 9.1 ppb (8) | 1.2 ppb (1) | 10.6 ppb (10) | 8.0 ppb (7) | 9.0 ppb (8) | 0.0 ppb (0) | 47.0 ppb (36) | 0.25 ppb (3) | 35.0 μg/m3 (32) | 15.0 μg/m3 (56) | 56.0 | |
| March 24, 2019, 8 p.m. | 6.2 ppb (6) | 0.8 ppb (1) | 7.5 ppb (7) | 5.0 ppb (5) | 6.5 ppb (6) | 0.0 ppb (0) | 48.0 ppb (37) | 0.22 ppb (2) | 25.0 μg/m3 (23) | 13.0 μg/m3 (52) | 52.0 | |
| March 24, 2019, 7 p.m. | 6.3 ppb (6) | 1.1 ppb (1) | 7.5 ppb (7) | 5.0 ppb (5) | 6.3 ppb (6) | 0.0 ppb (0) | 42.0 ppb (32) | 0.2 ppb (2) | 26.0 μg/m3 (24) | 11.0 μg/m3 (46) | 46.0 | |
| March 24, 2019, 6 p.m. | 6.4 ppb (6) | 1.4 ppb (1) | 7.5 ppb (7) | 5.0 ppb (5) | 6.0 ppb (6) | 0.0 ppb (0) | 37.0 ppb (28) | 0.2 ppb (2) | 22.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| March 24, 2019, 5 p.m. | 7.7 ppb (7) | 1.8 ppb (2) | 8.5 ppb (8) | 6.0 ppb (6) | 6.5 ppb (6) | 0.0 ppb (0) | 31.0 ppb (24) | 0.19 ppb (2) | 21.0 μg/m3 (19) | 12.0 μg/m3 (50) | 50.0 | |
| March 24, 2019, 4 p.m. | 9.7 ppb (9) | 3.0 ppb (3) | 10.4 ppb (10) | 7.0 ppb (6) | 7.4 ppb (7) | 0.0 ppb (0) | 24.0 ppb (18) | 0.26 ppb (3) | 22.0 μg/m3 (20) | 14.0 μg/m3 (54) | 54.0 | |
| March 24, 2019, 3 p.m. | 27.0 ppb (25) | 11.8 ppb (11) | 26.8 ppb (25) | 15.0 ppb (14) | 14.9 ppb (14) | 0.0 ppb (0) | 9.0 ppb (7) | 0.45 ppb (5) | 23.0 μg/m3 (21) | 12.0 μg/m3 (50) | 50.0 | |
| March 24, 2019, 2 p.m. | 38.9 ppb (36) | 19.5 ppb (18) | 38.1 ppb (35) | 19.0 ppb (18) | 18.7 ppb (17) | 0.0 ppb (0) | 2.0 ppb (2) | 0.53 ppb (6) | 23.0 μg/m3 (21) | 13.0 μg/m3 (52) | 52.0 | |
| March 24, 2019, 1 p.m. | 30.1 ppb (28) | 11.0 ppb (10) | 27.7 ppb (26) | 19.0 ppb (18) | 17.5 ppb (16) | 0.0 ppb (0) | 1.0 ppb (1) | 0.45 ppb (5) | 20.0 μg/m3 (18) | 14.0 μg/m3 (54) | 54.0 | |
| March 24, 2019, noon | 30.0 ppb (28) | 12.6 ppb (12) | 30.2 ppb (28) | 17.0 ppb (16) | 17.4 ppb (16) | 0.0 ppb (0) | 1.0 ppb (1) | 0.51 ppb (6) | 17.0 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| March 24, 2019, 11 a.m. | 17.7 ppb (16) | 2.6 ppb (2) | 18.7 ppb (17) | 15.0 ppb (14) | 15.6 ppb (14) | 0.0 ppb (0) | 3.0 ppb (2) | 0.39 ppb (4) | 22.0 μg/m3 (20) | 14.0 μg/m3 (54) | 54.0 | |
| March 24, 2019, 10 a.m. | 21.4 ppb (20) | 4.7 ppb (4) | 22.9 ppb (21) | 17.0 ppb (16) | 18.9 ppb (18) | 0.0 ppb (0) | 2.0 ppb (2) | 0.48 ppb (5) | 19.0 μg/m3 (17) | 12.0 μg/m3 (50) | 50.0 | |
| March 24, 2019, 9 a.m. | 20.8 ppb (19) | 1.6 ppb (1) | 20.6 ppb (19) | 19.0 ppb (18) | 19.4 ppb (18) | 0.0 ppb (0) | 4.0 ppb (3) | 0.45 ppb (5) | 15.0 μg/m3 (14) | 9.0 μg/m3 (38) | 38.0 | |
| March 24, 2019, 8 a.m. | 20.7 ppb (19) | 1.7 ppb (2) | 19.3 ppb (18) | 19.0 ppb (18) | 18.6 ppb (17) | 0.0 ppb (0) | 10.0 ppb (8) | 0.34 ppb (4) | 26.0 μg/m3 (24) | 8.0 μg/m3 (33) | 33.0 | |
| March 24, 2019, 7 a.m. | 12.0 ppb (11) | 0.5 ppb (0) | 13.0 ppb (12) | 11.0 ppb (10) | 13.0 ppb (12) | 0.0 ppb (0) | 21.0 ppb (16) | 0.26 ppb (3) | 22.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| March 24, 2019, 6 a.m. | 20.1 ppb (19) | 1.2 ppb (1) | 21.1 ppb (20) | 19.0 ppb (18) | 20.3 ppb (19) | 0.0 ppb (0) | 9.0 ppb (7) | 0.41 ppb (5) | 19.0 μg/m3 (17) | 13.0 μg/m3 (52) | 52.0 | |
| March 24, 2019, 5 a.m. | 9.8 ppb (9) | 0.2 ppb (0) | 10.5 ppb (10) | 10.0 ppb (9) | 10.5 ppb (10) | 0.0 ppb (0) | 19.0 ppb (15) | 0.29 ppb (3) | 11.0 μg/m3 (10) | 3.0 μg/m3 (12) | 15.0 | |
| March 24, 2019, 4 a.m. | 5.0 ppb (5) | -0.1 ppb (0) | 5.6 ppb (5) | 5.0 ppb (5) | 5.6 ppb (5) | 0.0 ppb (0) | 27.0 ppb (21) | 0.21 ppb (2) | 12.0 μg/m3 (11) | 3.0 μg/m3 (12) | 21.0 | |
| March 24, 2019, 3 a.m. | 3.7 ppb (3) | -0.1 ppb (0) | 4.2 ppb (4) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 29.0 ppb (22) | 0.16 ppb (2) | 16.0 μg/m3 (15) | 5.0 μg/m3 (21) | 22.0 | |
| March 24, 2019, 2 a.m. | 3.6 ppb (3) | -0.1 ppb (0) | 4.3 ppb (4) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 29.0 ppb (22) | 0.16 ppb (2) | 11.0 μg/m3 (10) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2019, 1 a.m. | 3.6 ppb (3) | 0.0 ppb (0) | 4.3 ppb (4) | 4.0 ppb (4) | 4.0 ppb (4) | 0.0 ppb (0) | 30.0 ppb (23) | 0.15 ppb (2) | 13.0 μg/m3 (12) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2019, midnight | 3.4 ppb (3) | 0.1 ppb (0) | 4.2 ppb (4) | 3.0 ppb (3) | 3.8 ppb (4) | 0.0 ppb (0) | 32.0 ppb (25) | 0.15 ppb (2) | 15.0 μg/m3 (14) | 5.0 μg/m3 (21) | 25.0 | |
| March 23, 2019, 11 p.m. | 3.9 ppb (4) | 0.2 ppb (0) | 4.9 ppb (5) | 4.0 ppb (4) | 4.4 ppb (4) | 0.0 ppb (0) | 39.0 ppb (30) | 0.17 ppb (2) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 30.0 | |
| March 23, 2019, 10 p.m. | 5.4 ppb (5) | 0.4 ppb (0) | 6.4 ppb (6) | 5.0 ppb (5) | 5.8 ppb (5) | 0.0 ppb (0) | 44.0 ppb (34) | 0.18 ppb (2) | 21.0 μg/m3 (19) | 9.0 μg/m3 (38) | 38.0 | |
| March 23, 2019, 9 p.m. | 11.7 ppb (11) | 2.7 ppb (3) | 12.2 ppb (11) | 9.0 ppb (8) | 8.3 ppb (8) | 0.0 ppb (0) | 39.0 ppb (30) | 0.19 ppb (2) | 25.0 μg/m3 (23) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2019, 8 p.m. | 10.2 ppb (9) | 1.9 ppb (2) | 12.0 ppb (11) | 8.0 ppb (7) | 9.4 ppb (9) | 0.0 ppb (0) | 39.0 ppb (30) | 0.22 ppb (2) | 27.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2019, 7 p.m. | 16.2 ppb (15) | 3.8 ppb (4) | 17.2 ppb (16) | 12.0 ppb (11) | 12.7 ppb (12) | 0.0 ppb (0) | 33.0 ppb (25) | 0.26 ppb (3) | 28.0 μg/m3 (25) | 14.0 μg/m3 (54) | 54.0 | |
| March 23, 2019, 6 p.m. | 13.0 ppb (12) | 3.1 ppb (3) | 14.0 ppb (13) | 10.0 ppb (9) | 10.2 ppb (9) | 0.0 ppb (0) | 32.0 ppb (25) | 0.24 ppb (3) | 31.0 μg/m3 (28) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2019, 5 p.m. | 13.2 ppb (12) | 3.4 ppb (3) | 13.4 ppb (12) | 10.0 ppb (9) | 9.7 ppb (9) | 0.0 ppb (0) | 28.0 ppb (22) | 0.22 ppb (2) | 42.0 μg/m3 (38) | 12.0 μg/m3 (50) | 50.0 | |
| March 23, 2019, 4 p.m. | 14.0 ppb (13) | 2.6 ppb (2) | 14.6 ppb (14) | 11.0 ppb (10) | 11.9 ppb (11) | 0.0 ppb (0) | 20.0 ppb (15) | 0.27 ppb (3) | 69.0 μg/m3 (57) | 27.0 μg/m3 (82) | 82.0 | |
| March 23, 2019, 3 p.m. | 14.4 ppb (13) | 2.5 ppb (2) | 14.5 ppb (13) | 12.0 ppb (11) | 12.5 ppb (12) | 0.0 ppb (0) | 15.0 ppb (12) | 0.28 ppb (3) | 21.0 μg/m3 (19) | 13.0 μg/m3 (52) | 52.0 | |
| March 23, 2019, 2 p.m. | 18.0 ppb (17) | 2.9 ppb (3) | 17.5 ppb (16) | 15.0 ppb (14) | 15.6 ppb (14) | 0.0 ppb (0) | 10.0 ppb (8) | 0.31 ppb (3) | 33.0 μg/m3 (30) | 14.0 μg/m3 (54) | 54.0 | |
| March 23, 2019, 1 p.m. | 22.2 ppb (21) | 4.0 ppb (4) | 18.3 ppb (17) | 18.0 ppb (17) | 15.5 ppb (14) | 0.0 ppb (0) | 7.0 ppb (5) | 0.33 ppb (4) | 28.0 μg/m3 (25) | 13.0 μg/m3 (52) | 52.0 | |
| March 23, 2019, noon | 28.8 ppb (27) | 7.4 ppb (7) | 27.4 ppb (25) | 21.0 ppb (19) | 22.0 ppb (20) | 0.0 ppb (0) | 6.0 ppb (5) | 0.39 ppb (4) | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2019, 11 a.m. | 30.8 ppb (29) | 8.9 ppb (8) | 27.3 ppb (25) | 22.0 ppb (20) | 19.9 ppb (18) | 0.0 ppb (0) | 5.0 ppb (4) | 0.38 ppb (4) | 28.0 μg/m3 (25) | 12.0 μg/m3 (50) | 50.0 | |
| March 23, 2019, 10 a.m. | 24.8 ppb (23) | 2.3 ppb (2) | 26.1 ppb (24) | 23.0 ppb (21) | 24.3 ppb (23) | 0.0 ppb (0) | 4.0 ppb (3) | 0.48 ppb (5) | 27.0 μg/m3 (25) | 14.0 μg/m3 (54) | 54.0 | |
| March 23, 2019, 9 a.m. | 34.8 ppb (32) | 7.8 ppb (7) | 28.6 ppb (26) | 27.0 ppb (25) | 24.9 ppb (23) | 0.0 ppb (0) | 2.0 ppb (2) | 0.51 ppb (6) | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2019, 8 a.m. | 38.7 ppb (36) | 11.2 ppb (10) | 34.1 ppb (32) | 27.0 ppb (25) | 28.6 ppb (26) | 0.0 ppb (0) | 2.0 ppb (2) | 0.56 ppb (6) | 24.0 μg/m3 (22) | 12.0 μg/m3 (50) | 50.0 | |
| March 23, 2019, 7 a.m. | 38.4 ppb (36) | 9.0 ppb (8) | 38.3 ppb (35) | 29.0 ppb (27) | 30.4 ppb (28) | 0.0 ppb (0) | 3.0 ppb (2) | 0.55 ppb (6) | 27.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| March 23, 2019, 6 a.m. | 25.4 ppb (24) | 1.3 ppb (1) | 24.8 ppb (23) | 24.0 ppb (22) | 24.3 ppb (23) | 0.0 ppb (0) | 12.0 ppb (9) | 0.36 ppb (4) | 39.0 μg/m3 (35) | 7.0 μg/m3 (29) | 35.0 | |
| March 23, 2019, 5 a.m. | 13.5 ppb (12) | 0.4 ppb (0) | 17.1 ppb (16) | 13.0 ppb (12) | 16.4 ppb (15) | 0.0 ppb (0) | 23.0 ppb (18) | 0.3 ppb (3) | 17.0 μg/m3 (15) | 8.0 μg/m3 (33) | 33.0 | |
| March 23, 2019, 4 a.m. | 10.0 ppb (9) | 0.2 ppb (0) | 10.4 ppb (10) | 10.0 ppb (9) | 10.3 ppb (10) | 0.0 ppb (0) | 29.0 ppb (22) | 0.22 ppb (2) | 17.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| March 23, 2019, 3 a.m. | 6.3 ppb (6) | 0.0 ppb (0) | 6.9 ppb (6) | 6.0 ppb (6) | 6.9 ppb (6) | 0.0 ppb (0) | 35.0 ppb (27) | 0.2 ppb (2) | 12.0 μg/m3 (11) | 5.0 μg/m3 (21) | 27.0 | |
| March 23, 2019, 2 a.m. | 5.2 ppb (5) | -0.1 ppb (0) | 5.8 ppb (5) | 5.0 ppb (5) | 5.7 ppb (5) | 0.0 ppb (0) | 37.0 ppb (28) | 0.19 ppb (2) | 12.0 μg/m3 (11) | 5.0 μg/m3 (21) | 28.0 | |
| March 23, 2019, 1 a.m. | 5.3 ppb (5) | 0.0 ppb (0) | 5.8 ppb (5) | 5.0 ppb (5) | 5.6 ppb (5) | 0.0 ppb (0) | 41.0 ppb (32) | 0.19 ppb (2) | 16.0 μg/m3 (15) | 7.0 μg/m3 (29) | 32.0 | |
| March 23, 2019, midnight | 5.7 ppb (5) | 0.4 ppb (0) | 6.4 ppb (6) | 5.0 ppb (5) | 5.7 ppb (5) | 0.0 ppb (0) | 42.0 ppb (32) | 0.2 ppb (2) | 14.0 μg/m3 (13) | 6.0 μg/m3 (25) | 32.0 | |
| March 22, 2019, 11 p.m. | 7.2 ppb (7) | 0.9 ppb (1) | 8.0 ppb (7) | 6.0 ppb (6) | 6.8 ppb (6) | 0.0 ppb (0) | 45.0 ppb (35) | 0.22 ppb (2) | 18.0 μg/m3 (16) | 7.0 μg/m3 (29) | 35.0 | |
| March 22, 2019, 10 p.m. | 10.1 ppb (9) | 1.5 ppb (1) | 10.7 ppb (10) | 9.0 ppb (8) | 8.8 ppb (8) | 0.0 ppb (0) | 46.0 ppb (35) | 0.25 ppb (3) | 24.0 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| March 22, 2019, 9 p.m. | 10.0 ppb (9) | 1.7 ppb (2) | 10.7 ppb (10) | 8.0 ppb (7) | 8.6 ppb (8) | 0.0 ppb (0) | 44.0 ppb (34) | 0.25 ppb (3) | 19.0 μg/m3 (17) | 7.0 μg/m3 (29) | 34.0 | |
| March 22, 2019, 8 p.m. | 10.4 ppb (10) | 1.9 ppb (2) | 11.1 ppb (10) | 8.0 ppb (7) | 8.7 ppb (8) | 0.0 ppb (0) | 43.0 ppb (33) | 0.25 ppb (3) | 16.0 μg/m3 (15) | 9.0 μg/m3 (38) | 38.0 | |
| March 22, 2019, 7 p.m. | 13.0 ppb (12) | 3.1 ppb (3) | 13.8 ppb (13) | 10.0 ppb (9) | 10.3 ppb (10) | 0.0 ppb (0) | 38.0 ppb (29) | 0.26 ppb (3) | 26.0 μg/m3 (24) | 12.0 μg/m3 (50) | 50.0 | |
| March 22, 2019, 6 p.m. | 23.6 ppb (22) | 7.0 ppb (6) | 23.5 ppb (22) | 17.0 ppb (16) | 15.9 ppb (15) | 0.0 ppb (0) | 31.0 ppb (24) | 0.3 ppb (3) | 32.0 μg/m3 (29) | 12.0 μg/m3 (50) | 50.0 | |
| March 22, 2019, 5 p.m. | 25.1 ppb (23) | 7.2 ppb (7) | 25.7 ppb (24) | 18.0 ppb (17) | 17.6 ppb (16) | 0.0 ppb (0) | 27.0 ppb (21) | 0.27 ppb (3) | 22.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| March 22, 2019, 4 p.m. | 36.1 ppb (33) | 13.5 ppb (12) | 35.9 ppb (33) | 23.0 ppb (21) | 21.7 ppb (20) | 0.0 ppb (0) | 17.0 ppb (13) | 0.39 ppb (4) | 29.0 μg/m3 (26) | 13.0 μg/m3 (52) | 52.0 | |
| March 22, 2019, 3 p.m. | 61.0 ppb (57) | 35.6 ppb (33) | 59.7 ppb (56) | 25.0 ppb (23) | 22.9 ppb (21) | 0.0 ppb (0) | 5.0 ppb (4) | 0.58 ppb (6) | 29.0 μg/m3 (26) | 11.0 μg/m3 (46) | 57.0 | |
| March 22, 2019, 2 p.m. | 70.9 ppb (68) | 45.8 ppb (42) | 68.8 ppb (66) | 25.0 ppb (23) | 21.4 ppb (20) | 0.0 ppb (0) | 1.0 ppb (1) | 0.75 ppb (8) | 31.0 μg/m3 (28) | 9.0 μg/m3 (38) | 68.0 | |
| March 22, 2019, 1 p.m. | 52.1 ppb (48) | 27.9 ppb (26) | 53.2 ppb (49) | 24.0 ppb (22) | 19.5 ppb (18) | 0.0 ppb (0) | 1.0 ppb (1) | 0.57 ppb (6) | 21.0 μg/m3 (19) | 10.0 μg/m3 (42) | 49.0 | |
| March 22, 2019, noon | 50.0 ppb (46) | 22.8 ppb (21) | 44.7 ppb (41) | 27.0 ppb (25) | 27.2 ppb (25) | 0.0 ppb (0) | 1.0 ppb (1) | 0.5 ppb (6) | 18.0 μg/m3 (16) | 8.0 μg/m3 (33) | 46.0 | |
| March 22, 2019, 11 a.m. | 15.2 ppb (14) | 1.4 ppb (1) | 18.5 ppb (17) | 14.0 ppb (13) | 16.4 ppb (15) | 0.0 ppb (0) | 17.0 ppb (13) | 0.28 ppb (3) | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 22, 2019, 10 a.m. | 15.5 ppb (14) | 1.2 ppb (1) | 13.3 ppb (12) | 14.0 ppb (13) | 13.0 ppb (12) | 0.0 ppb (0) | 18.0 ppb (14) | 0.29 ppb (3) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 9 a.m. | 19.9 ppb (18) | 3.8 ppb (4) | 12.4 ppb (11) | 16.0 ppb (15) | 12.0 ppb (11) | 0.0 ppb (0) | 15.0 ppb (12) | 0.35 ppb (4) | 15.0 μg/m3 (14) | 7.0 μg/m3 (29) | 29.0 | |
| March 22, 2019, 8 a.m. | 46.2 ppb (43) | 20.3 ppb (19) | 46.1 ppb (43) | 26.0 ppb (24) | 26.6 ppb (25) | 0.0 ppb (0) | 1.0 ppb (1) | 0.62 ppb (7) | 17.0 μg/m3 (15) | 11.0 μg/m3 (46) | 46.0 | |
| March 22, 2019, 7 a.m. | 44.2 ppb (41) | 14.7 ppb (14) | 45.7 ppb (42) | 29.0 ppb (27) | 30.1 ppb (28) | 0.0 ppb (0) | 1.0 ppb (1) | 0.64 ppb (7) | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| March 22, 2019, 6 a.m. | 33.9 ppb (31) | 5.2 ppb (5) | 34.7 ppb (32) | 29.0 ppb (27) | 30.5 ppb (28) | 0.0 ppb (0) | 3.0 ppb (2) | 0.61 ppb (7) | 22.0 μg/m3 (20) | 7.0 μg/m3 (29) | 32.0 | |
| March 22, 2019, 5 a.m. | 25.4 ppb (24) | 2.4 ppb (2) | 25.9 ppb (24) | 23.0 ppb (21) | 24.0 ppb (22) | 0.0 ppb (0) | 12.0 ppb (9) | 0.62 ppb (7) | 23.0 μg/m3 (21) | 7.0 μg/m3 (29) | 29.0 | |
| March 22, 2019, 4 a.m. | 11.7 ppb (11) | 0.1 ppb (0) | 12.2 ppb (11) | 12.0 ppb (11) | 12.1 ppb (11) | 0.0 ppb (0) | 30.0 ppb (23) | 0.33 ppb (4) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 3 a.m. | 6.7 ppb (6) | -0.1 ppb (0) | 7.1 ppb (7) | 7.0 ppb (6) | 7.1 ppb (7) | 0.0 ppb (0) | 39.0 ppb (30) | 0.2 ppb (2) | 11.0 μg/m3 (10) | 4.0 μg/m3 (17) | 30.0 | |
| March 22, 2019, 2 a.m. | 5.5 ppb (5) | -0.1 ppb (0) | 5.8 ppb (5) | 6.0 ppb (6) | 5.8 ppb (5) | 0.0 ppb (0) | 40.0 ppb (31) | 0.19 ppb (2) | 7.0 μg/m3 (6) | 2.0 μg/m3 (8) | 31.0 | |
| March 22, 2019, 1 a.m. | 4.9 ppb (5) | 0.0 ppb (0) | 5.2 ppb (5) | 5.0 ppb (5) | 5.0 ppb (5) | 0.0 ppb (0) | 38.0 ppb (29) | 0.18 ppb (2) | 7.0 μg/m3 (6) | 2.0 μg/m3 (8) | 29.0 | |
| March 22, 2019, midnight | 4.8 ppb (4) | 0.3 ppb (0) | 5.1 ppb (5) | 5.0 ppb (5) | 4.5 ppb (4) | 0.0 ppb (0) | 40.0 ppb (31) | 0.17 ppb (2) | 6.0 μg/m3 (5) | 5.0 μg/m3 (21) | 31.0 | |
| March 21, 2019, 11 p.m. | 7.7 ppb (7) | 1.2 ppb (1) | 8.0 ppb (7) | 7.0 ppb (6) | 6.5 ppb (6) | 0.0 ppb (0) | 40.0 ppb (31) | 0.19 ppb (2) | 10.0 μg/m3 (9) | 4.0 μg/m3 (17) | 31.0 | |
| March 21, 2019, 10 p.m. | 15.6 ppb (14) | 3.1 ppb (3) | 15.8 ppb (15) | 12.0 ppb (11) | 12.1 ppb (11) | 0.0 ppb (0) | 35.0 ppb (27) | 0.24 ppb (3) | 15.0 μg/m3 (14) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2019, 9 p.m. | 21.6 ppb (20) | 4.0 ppb (4) | 21.0 ppb (19) | 18.0 ppb (17) | 16.2 ppb (15) | 0.0 ppb (0) | 29.0 ppb (22) | 0.28 ppb (3) | 16.0 μg/m3 (15) | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 8 p.m. | 15.0 ppb (14) | 2.8 ppb (3) | 15.4 ppb (14) | 12.0 ppb (11) | 12.1 ppb (11) | 0.0 ppb (0) | 35.0 ppb (27) | 0.21 ppb (2) | 20.0 μg/m3 (18) | 6.0 μg/m3 (25) | 27.0 | |
| March 21, 2019, 7 p.m. | 15.8 ppb (15) | 2.7 ppb (3) | 16.0 ppb (15) | 13.0 ppb (12) | 13.1 ppb (12) | 0.0 ppb (0) | 34.0 ppb (26) | 0.22 ppb (2) | 17.0 μg/m3 (15) | 5.0 μg/m3 (21) | 26.0 | |
| March 21, 2019, 6 p.m. | 15.8 ppb (15) | 2.3 ppb (2) | 15.8 ppb (15) | 14.0 ppb (13) | 13.4 ppb (12) | 0.0 ppb (0) | 34.0 ppb (26) | 0.22 ppb (2) | 21.0 μg/m3 (19) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2019, 5 p.m. | 29.0 ppb (27) | 7.3 ppb (7) | 28.3 ppb (26) | 22.0 ppb (20) | 20.3 ppb (19) | 0.0 ppb (0) | 25.0 ppb (19) | 0.33 ppb (4) | 30.0 μg/m3 (27) | 11.0 μg/m3 (46) | 46.0 | |
| March 21, 2019, 4 p.m. | 52.2 ppb (48) | 19.2 ppb (18) | 50.0 ppb (46) | 30.0 ppb (28) | 29.3 ppb (27) | 0.0 ppb (0) | 13.0 ppb (10) | 0.41 ppb (5) | 37.0 μg/m3 (34) | 12.0 μg/m3 (50) | 50.0 | |
| March 21, 2019, 3 p.m. | 53.2 ppb (49) | 22.3 ppb (21) | 49.9 ppb (46) | 31.0 ppb (29) | 29.4 ppb (27) | 0.0 ppb (0) | 6.0 ppb (5) | 0.47 ppb (5) | 36.0 μg/m3 (33) | 14.0 μg/m3 (54) | 54.0 | |
| March 21, 2019, 2 p.m. | 62.6 ppb (59) | 30.6 ppb (28) | 58.6 ppb (55) | 32.0 ppb (30) | 28.9 ppb (27) | 0.0 ppb (0) | 2.0 ppb (2) | 0.61 ppb (7) | 32.0 μg/m3 (29) | 8.0 μg/m3 (33) | 59.0 | |
| March 21, 2019, 1 p.m. | 46.6 ppb (43) | 16.6 ppb (15) | 43.7 ppb (40) | 30.0 ppb (28) | 26.2 ppb (24) | 0.0 ppb (0) | 1.0 ppb (1) | 0.51 ppb (6) | 22.0 μg/m3 (20) | 8.0 μg/m3 (33) | 43.0 | |
| March 21, 2019, noon | 45.6 ppb (42) | 22.0 ppb (20) | 35.7 ppb (33) | 24.0 ppb (22) | 19.6 ppb (18) | 0.0 ppb (0) | 2.0 ppb (2) | 0.38 ppb (4) | 20.0 μg/m3 (18) | 8.0 μg/m3 (33) | 42.0 | |
| March 21, 2019, 11 a.m. | 26.7 ppb (25) | 4.2 ppb (4) | 26.3 ppb (24) | 22.0 ppb (20) | 21.1 ppb (20) | 0.0 ppb (0) | 4.0 ppb (3) | 0.32 ppb (4) | 19.0 μg/m3 (17) | 10.0 μg/m3 (42) | 42.0 | |
| March 21, 2019, 10 a.m. | 25.3 ppb (23) | 2.7 ppb (3) | 22.8 ppb (21) | 23.0 ppb (21) | 22.0 ppb (20) | 0.0 ppb (0) | 4.0 ppb (3) | 0.31 ppb (3) | 13.0 μg/m3 (12) | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 9 a.m. | 18.6 ppb (17) | 0.6 ppb (1) | 17.6 ppb (16) | 18.0 ppb (17) | 17.5 ppb (16) | 0.0 ppb (0) | 11.0 ppb (8) | 0.31 ppb (3) | 14.0 μg/m3 (13) | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2019, 8 a.m. | 22.6 ppb (21) | 1.5 ppb (1) | 23.3 ppb (22) | 21.0 ppb (19) | 22.0 ppb (20) | 0.0 ppb (0) | 11.0 ppb (8) | 0.34 ppb (4) | 19.0 μg/m3 (17) | 5.0 μg/m3 (21) | 22.0 | |
| March 21, 2019, 7 a.m. | 20.0 ppb (19) | 2.0 ppb (2) | 22.1 ppb (20) | 18.0 ppb (17) | 20.4 ppb (19) | 0.0 ppb (0) | 17.0 ppb (13) | 0.37 ppb (4) | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2019, 6 a.m. | 26.0 ppb (24) | 3.9 ppb (4) | 26.5 ppb (25) | 22.0 ppb (20) | 23.6 ppb (22) | 0.0 ppb (0) | 10.0 ppb (8) | 0.59 ppb (7) | 17.0 μg/m3 (15) | 8.0 μg/m3 (33) | 33.0 | |
| March 21, 2019, 5 a.m. | 26.0 ppb (24) | 1.3 ppb (1) | 28.0 ppb (26) | 25.0 ppb (23) | 26.7 ppb (25) | 0.0 ppb (0) | 11.0 ppb (8) | 0.51 ppb (6) | 22.0 μg/m3 (20) | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 4 a.m. | 13.9 ppb (13) | 0.4 ppb (0) | 14.1 ppb (13) | 14.0 ppb (13) | 13.9 ppb (13) | 0.0 ppb (0) | 27.0 ppb (21) | 0.38 ppb (4) | 18.0 μg/m3 (16) | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2019, 3 a.m. | 6.0 ppb (6) | -0.1 ppb (0) | 6.7 ppb (6) | 6.0 ppb (6) | 6.7 ppb (6) | 0.0 ppb (0) | 38.0 ppb (29) | 0.17 ppb (2) | 13.0 μg/m3 (12) | 2.0 μg/m3 (8) | 29.0 | |
| March 21, 2019, 2 a.m. | 4.9 ppb (5) | -0.2 ppb (0) | 5.5 ppb (5) | 5.0 ppb (5) | 5.5 ppb (5) | 0.0 ppb (0) | 39.0 ppb (30) | 0.17 ppb (2) | 12.0 μg/m3 (11) | 3.0 μg/m3 (12) | 30.0 | |
| March 21, 2019, 1 a.m. | 4.0 ppb (4) | -0.1 ppb (0) | 4.4 ppb (4) | 4.0 ppb (4) | 4.3 ppb (4) | 0.0 ppb (0) | 42.0 ppb (32) | 0.15 ppb (2) | 12.0 μg/m3 (11) | -2.0 μg/m3 (0) | 32.0 | |
| March 21, 2019, midnight | 6.8 ppb (6) | 0.6 ppb (1) | 7.3 ppb (7) | 6.0 ppb (6) | 6.4 ppb (6) | 0.0 ppb (0) | 41.0 ppb (32) | 0.17 ppb (2) | 12.0 μg/m3 (11) | 1.0 μg/m3 (4) | 32.0 | |
| March 20, 2019, 11 p.m. | 4.7 ppb (4) | 0.6 ppb (1) | 5.5 ppb (5) | 4.0 ppb (4) | 4.6 ppb (4) | 0.0 ppb (0) | 42.0 ppb (32) | 0.17 ppb (2) | 11.0 μg/m3 (10) | 6.0 μg/m3 (25) | 32.0 | |
| March 20, 2019, 10 p.m. | 18.5 ppb (17) | 2.5 ppb (2) | 18.8 ppb (17) | 16.0 ppb (15) | 16.0 ppb (15) | 0.0 ppb (0) | 33.0 ppb (25) | 0.29 ppb (3) | 24.0 μg/m3 (22) | 8.0 μg/m3 (33) | 33.0 | |
| March 20, 2019, 9 p.m. | 17.8 ppb (16) | 3.2 ppb (3) | 18.0 ppb (17) | 15.0 ppb (14) | 14.4 ppb (13) | N/A | 35.0 ppb (27) | N/A | 18.0 μg/m3 (16) | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, 8 p.m. | 12.6 ppb (12) | 1.4 ppb (1) | 13.1 ppb (12) | 11.0 ppb (10) | 11.4 ppb (11) | N/A | 35.0 ppb (27) | N/A | 19.0 μg/m3 (17) | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, 7 p.m. | 13.8 ppb (13) | 2.5 ppb (2) | 14.1 ppb (13) | 11.0 ppb (10) | 11.2 ppb (10) | 0.0 ppb (0) | 34.0 ppb (26) | 0.26 ppb (3) | 12.0 μg/m3 (11) | 6.0 μg/m3 (25) | 26.0 | |
| March 20, 2019, 6 p.m. | 13.4 ppb (12) | 2.6 ppb (2) | 13.6 ppb (13) | 11.0 ppb (10) | 10.6 ppb (10) | 0.0 ppb (0) | 34.0 ppb (26) | N/A | 17.0 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 5 p.m. | 19.9 ppb (18) | 6.4 ppb (6) | 19.8 ppb (18) | 14.0 ppb (13) | 12.3 ppb (11) | 0.0 ppb (0) | 29.0 ppb (22) | 0.22 ppb (2) | 28.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, 4 p.m. | 16.7 ppb (15) | 4.2 ppb (4) | 16.5 ppb (15) | 12.0 ppb (11) | 10.8 ppb (10) | 0.0 ppb (0) | 31.0 ppb (24) | 0.19 ppb (2) | 25.0 μg/m3 (23) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 3 p.m. | 22.5 ppb (21) | 4.1 ppb (4) | 21.4 ppb (20) | 18.0 ppb (17) | 17.2 ppb (16) | 0.0 ppb (0) | 24.0 ppb (18) | 0.22 ppb (2) | 36.0 μg/m3 (33) | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, 2 p.m. | 26.7 ppb (25) | 4.8 ppb (4) | 24.8 ppb (23) | 22.0 ppb (20) | 20.6 ppb (19) | 0.0 ppb (0) | 18.0 ppb (14) | 0.24 ppb (3) | 24.0 μg/m3 (22) | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, 1 p.m. | 19.7 ppb (18) | 1.7 ppb (2) | 17.5 ppb (16) | 18.0 ppb (17) | 15.8 ppb (15) | 0.0 ppb (0) | 23.0 ppb (18) | 0.21 ppb (2) | 20.0 μg/m3 (18) | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, noon | 15.0 ppb (14) | 1.3 ppb (1) | 11.0 ppb (10) | 14.0 ppb (13) | 10.9 ppb (10) | 0.0 ppb (0) | 27.0 ppb (21) | 0.2 ppb (2) | 23.0 μg/m3 (21) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 11 a.m. | 8.4 ppb (8) | 0.1 ppb (0) | 8.5 ppb (8) | 8.0 ppb (7) | 8.2 ppb (8) | 0.0 ppb (0) | 32.0 ppb (25) | 0.15 ppb (2) | 17.0 μg/m3 (15) | 7.0 μg/m3 (29) | 29.0 | |
| March 20, 2019, 10 a.m. | 9.5 ppb (9) | 0.1 ppb (0) | 9.4 ppb (9) | 9.0 ppb (8) | 9.4 ppb (9) | 0.0 ppb (0) | 31.0 ppb (24) | 0.15 ppb (2) | 19.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| March 20, 2019, 9 a.m. | 10.1 ppb (9) | 0.4 ppb (0) | 9.9 ppb (9) | 10.0 ppb (9) | 9.2 ppb (9) | 0.0 ppb (0) | 32.0 ppb (25) | 0.14 ppb (2) | 17.0 μg/m3 (15) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 8 a.m. | 7.6 ppb (7) | 0.2 ppb (0) | 7.5 ppb (7) | 7.0 ppb (6) | 7.5 ppb (7) | 0.0 ppb (0) | 36.0 ppb (28) | 0.15 ppb (2) | 20.0 μg/m3 (18) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 7 a.m. | 6.7 ppb (6) | 0.0 ppb (0) | 7.4 ppb (7) | 7.0 ppb (6) | 7.3 ppb (7) | 0.0 ppb (0) | 37.0 ppb (28) | 0.14 ppb (2) | 21.0 μg/m3 (19) | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, 6 a.m. | 6.9 ppb (6) | 0.0 ppb (0) | 7.8 ppb (7) | 7.0 ppb (6) | 7.8 ppb (7) | 0.0 ppb (0) | 36.0 ppb (28) | 0.15 ppb (2) | 17.0 μg/m3 (15) | 12.0 μg/m3 (50) | 50.0 | |
| March 20, 2019, 5 a.m. | 7.7 ppb (7) | -0.1 ppb (0) | 8.6 ppb (8) | 8.0 ppb (7) | 8.6 ppb (8) | 0.0 ppb (0) | 36.0 ppb (28) | 0.15 ppb (2) | 24.0 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 4 a.m. | 9.4 ppb (9) | 1.4 ppb (1) | 9.2 ppb (9) | 8.0 ppb (7) | 6.6 ppb (6) | 0.0 ppb (0) | 37.0 ppb (28) | 0.15 ppb (2) | 23.0 μg/m3 (21) | 13.0 μg/m3 (52) | 52.0 | |
| March 20, 2019, 3 a.m. | 8.4 ppb (8) | 0.7 ppb (1) | 9.7 ppb (9) | 8.0 ppb (7) | 8.9 ppb (8) | 0.0 ppb (0) | 35.0 ppb (27) | 0.17 ppb (2) | 26.0 μg/m3 (24) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 2 a.m. | 10.2 ppb (9) | 1.0 ppb (1) | 11.4 ppb (11) | 9.0 ppb (8) | 10.4 ppb (10) | 0.0 ppb (0) | 36.0 ppb (28) | 0.17 ppb (2) | 28.0 μg/m3 (25) | 14.0 μg/m3 (54) | 54.0 | |
| March 20, 2019, 1 a.m. | 10.6 ppb (10) | 0.3 ppb (0) | 11.9 ppb (11) | 10.0 ppb (9) | 11.5 ppb (11) | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 32.0 μg/m3 (29) | 12.0 μg/m3 (50) | 50.0 | |
| March 20, 2019, midnight | 10.1 ppb (9) | 0.6 ppb (1) | 11.4 ppb (11) | 9.0 ppb (8) | 10.6 ppb (10) | 0.0 ppb (0) | 41.0 ppb (32) | 0.18 ppb (2) | 26.0 μg/m3 (24) | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 11 p.m. | 13.2 ppb (12) | 1.7 ppb (2) | 15.1 ppb (14) | 11.0 ppb (10) | 13.0 ppb (12) | 0.0 ppb (0) | 42.0 ppb (32) | 0.2 ppb (2) | 33.0 μg/m3 (30) | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 10 p.m. | 13.9 ppb (13) | 1.8 ppb (2) | 15.5 ppb (14) | 12.0 ppb (11) | 13.5 ppb (12) | 0.0 ppb (0) | 44.0 ppb (34) | 0.21 ppb (2) | 29.0 μg/m3 (26) | 8.0 μg/m3 (33) | 34.0 | |
| March 19, 2019, 9 p.m. | 15.6 ppb (14) | 2.7 ppb (3) | 17.5 ppb (16) | 13.0 ppb (12) | 14.2 ppb (13) | 1.0 ppb (1) | 43.0 ppb (33) | 0.23 ppb (3) | 32.0 μg/m3 (29) | 26.0 μg/m3 (80) | 80.0 | |
| March 19, 2019, 8 p.m. | 14.5 ppb (13) | 2.5 ppb (2) | 16.6 ppb (15) | 12.0 ppb (11) | 13.7 ppb (13) | N/A | 46.0 ppb (35) | N/A | 33.0 μg/m3 (30) | N/A | 35.0 | |
| March 19, 2019, 7 p.m. | 19.4 ppb (18) | 3.7 ppb (3) | 21.9 ppb (20) | 16.0 ppb (15) | 17.8 ppb (16) | N/A | 44.0 ppb (34) | N/A | 35.0 μg/m3 (32) | 17.0 μg/m3 (61) | 61.0 | |
| March 19, 2019, 6 p.m. | 36.0 ppb (33) | 11.5 ppb (11) | 38.4 ppb (36) | 24.0 ppb (22) | 26.1 ppb (24) | N/A | 27.0 ppb (21) | N/A | 46.0 μg/m3 (42) | 29.0 μg/m3 (86) | 86.0 | |
| March 19, 2019, 5 p.m. | 72.7 ppb (70) | 35.6 ppb (33) | 74.9 ppb (72) | 37.0 ppb (34) | 37.8 ppb (35) | N/A | 11.0 ppb (8) | N/A | 63.0 μg/m3 (54) | 32.0 μg/m3 (93) | 93.0 | |
| March 19, 2019, 4 p.m. | 105.5 ppb (101) | 60.6 ppb (57) | 107.4 ppb (101) | 45.0 ppb (42) | 43.9 ppb (41) | 1.0 ppb (1) | 5.0 ppb (4) | 1.0 ppb (11) | 80.0 μg/m3 (62) | 34.0 μg/m3 (97) | 101.0 | |
| March 19, 2019, 3 p.m. | 83.9 ppb (82) | 47.8 ppb (44) | 84.6 ppb (83) | 36.0 ppb (33) | 35.5 ppb (33) | 0.0 ppb (0) | 4.0 ppb (3) | 0.97 ppb (11) | 53.0 μg/m3 (48) | 23.0 μg/m3 (73) | 83.0 | |
| March 19, 2019, 2 p.m. | 101.2 ppb (100) | 67.5 ppb (64) | 98.8 ppb (98) | 34.0 ppb (31) | 32.0 ppb (30) | 0.0 ppb (0) | 1.0 ppb (1) | 1.01 ppb (11) | 52.0 μg/m3 (47) | 21.0 μg/m3 (69) | 100.0 | |
| March 19, 2019, 1 p.m. | 67.1 ppb (64) | 36.3 ppb (34) | 60.2 ppb (57) | 31.0 ppb (29) | 26.6 ppb (25) | 0.0 ppb (0) | 1.0 ppb (1) | 0.75 ppb (8) | 39.0 μg/m3 (35) | 17.0 μg/m3 (61) | 64.0 | |
| March 19, 2019, noon | 58.3 ppb (55) | 30.4 ppb (28) | 48.2 ppb (45) | 28.0 ppb (26) | 29.0 ppb (27) | 0.0 ppb (0) | 1.0 ppb (1) | 0.66 ppb (7) | 30.0 μg/m3 (27) | 12.0 μg/m3 (50) | 55.0 | |
| March 19, 2019, 11 a.m. | 34.5 ppb (32) | 8.5 ppb (8) | 33.6 ppb (31) | 26.0 ppb (24) | 26.0 ppb (24) | 0.0 ppb (0) | 1.0 ppb (1) | 0.5 ppb (6) | 33.0 μg/m3 (30) | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 10 a.m. | 35.5 ppb (33) | 9.9 ppb (9) | 38.8 ppb (36) | 26.0 ppb (24) | 29.1 ppb (27) | 0.0 ppb (0) | 2.0 ppb (2) | 0.46 ppb (5) | 38.0 μg/m3 (35) | 22.0 μg/m3 (71) | 71.0 | |
| March 19, 2019, 9 a.m. | 38.6 ppb (36) | 9.4 ppb (9) | 38.4 ppb (36) | 29.0 ppb (27) | 28.3 ppb (26) | 0.0 ppb (0) | 2.0 ppb (2) | 0.46 ppb (5) | 41.0 μg/m3 (37) | 24.0 μg/m3 (76) | 76.0 | |
| March 19, 2019, 8 a.m. | 31.6 ppb (29) | 3.2 ppb (3) | 33.7 ppb (31) | 28.0 ppb (26) | 31.7 ppb (29) | 0.0 ppb (0) | 5.0 ppb (4) | 0.46 ppb (5) | 33.0 μg/m3 (30) | 21.0 μg/m3 (69) | 69.0 | |
| March 19, 2019, 7 a.m. | 27.6 ppb (26) | 2.0 ppb (2) | 29.8 ppb (28) | 26.0 ppb (24) | 28.7 ppb (27) | 0.0 ppb (0) | 10.0 ppb (8) | 0.46 ppb (5) | 31.0 μg/m3 (28) | 16.0 μg/m3 (59) | 59.0 | |
| March 19, 2019, 6 a.m. | 25.5 ppb (24) | 1.0 ppb (1) | 28.2 ppb (26) | 24.0 ppb (22) | 27.8 ppb (26) | 0.0 ppb (0) | 19.0 ppb (15) | 0.33 ppb (4) | 33.0 μg/m3 (30) | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 5 a.m. | 28.0 ppb (26) | 1.8 ppb (2) | 30.2 ppb (28) | 26.0 ppb (24) | 29.2 ppb (27) | 0.0 ppb (0) | 19.0 ppb (15) | 0.32 ppb (4) | 34.0 μg/m3 (31) | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 4 a.m. | 26.7 ppb (25) | 1.0 ppb (1) | 27.8 ppb (26) | 26.0 ppb (24) | 27.5 ppb (25) | 0.0 ppb (0) | 21.0 ppb (16) | 0.35 ppb (4) | 35.0 μg/m3 (32) | 11.0 μg/m3 (46) | 46.0 | |
| March 19, 2019, 3 a.m. | 30.0 ppb (28) | 1.0 ppb (1) | 31.1 ppb (29) | 29.0 ppb (27) | 30.5 ppb (28) | 1.0 ppb (1) | 25.0 ppb (19) | 0.39 ppb (4) | 37.0 μg/m3 (34) | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 2 a.m. | 22.0 ppb (20) | 0.1 ppb (0) | 23.6 ppb (22) | 22.0 ppb (20) | 23.4 ppb (22) | 0.0 ppb (0) | 44.0 ppb (34) | 0.34 ppb (4) | 33.0 μg/m3 (30) | 13.0 μg/m3 (52) | 52.0 | |
| March 19, 2019, 1 a.m. | 16.2 ppb (15) | 0.4 ppb (0) | 17.8 ppb (16) | 16.0 ppb (15) | 17.1 ppb (16) | 0.0 ppb (0) | 52.0 ppb (40) | 0.29 ppb (3) | 27.0 μg/m3 (25) | 7.0 μg/m3 (29) | 40.0 | |
| March 19, 2019, midnight | 15.7 ppb (15) | 1.1 ppb (1) | 17.5 ppb (16) | 15.0 ppb (14) | 16.0 ppb (15) | 0.0 ppb (0) | 55.0 ppb (42) | 0.29 ppb (3) | 25.0 μg/m3 (23) | 7.0 μg/m3 (29) | 42.0 | |
| March 18, 2019, 11 p.m. | 12.8 ppb (12) | 0.9 ppb (1) | 15.0 ppb (14) | 12.0 ppb (11) | 13.7 ppb (13) | 1.0 ppb (1) | 65.0 ppb (50) | 0.31 ppb (3) | 32.0 μg/m3 (29) | 18.0 μg/m3 (63) | 63.0 | |
| March 18, 2019, 10 p.m. | 22.6 ppb (21) | 2.4 ppb (2) | 25.1 ppb (23) | 20.0 ppb (19) | 22.0 ppb (20) | 1.0 ppb (1) | 59.0 ppb (45) | 0.37 ppb (4) | 44.0 μg/m3 (40) | 19.0 μg/m3 (65) | 65.0 | |
| March 18, 2019, 9 p.m. | 30.5 ppb (28) | 4.1 ppb (4) | 32.7 ppb (30) | 26.0 ppb (24) | 27.6 ppb (26) | 1.0 ppb (1) | 52.0 ppb (40) | 0.46 ppb (5) | 51.0 μg/m3 (46) | 19.0 μg/m3 (65) | 65.0 | |
| March 18, 2019, 8 p.m. | 32.4 ppb (30) | 4.9 ppb (5) | 34.8 ppb (32) | 28.0 ppb (26) | 28.7 ppb (27) | 1.0 ppb (1) | 49.0 ppb (38) | 0.48 ppb (5) | 53.0 μg/m3 (48) | 21.0 μg/m3 (69) | 69.0 | |
| March 18, 2019, 7 p.m. | 36.8 ppb (34) | 7.3 ppb (7) | 38.5 ppb (36) | 30.0 ppb (28) | 29.6 ppb (27) | 1.0 ppb (1) | 41.0 ppb (32) | 0.41 ppb (5) | 52.0 μg/m3 (47) | 20.0 μg/m3 (67) | 67.0 | |
| March 18, 2019, 6 p.m. | 36.1 ppb (33) | 9.1 ppb (8) | 37.5 ppb (35) | 27.0 ppb (25) | 26.8 ppb (25) | 0.0 ppb (0) | 31.0 ppb (24) | 0.4 ppb (4) | 41.0 μg/m3 (37) | 14.0 μg/m3 (54) | 54.0 | |
| March 18, 2019, 5 p.m. | 33.1 ppb (31) | 10.4 ppb (10) | 33.9 ppb (31) | 23.0 ppb (21) | 24.0 ppb (22) | 0.0 ppb (0) | 27.0 ppb (21) | 0.36 ppb (4) | 31.0 μg/m3 (28) | 14.0 μg/m3 (54) | 54.0 | |
| March 18, 2019, 4 p.m. | 50.6 ppb (47) | 20.3 ppb (19) | 50.3 ppb (47) | 30.0 ppb (28) | 29.2 ppb (27) | 0.0 ppb (0) | 16.0 ppb (12) | 0.52 ppb (6) | 40.0 μg/m3 (36) | 20.0 μg/m3 (67) | 67.0 | |
| March 18, 2019, 3 p.m. | 67.2 ppb (64) | 32.7 ppb (30) | 66.4 ppb (63) | 35.0 ppb (32) | 32.3 ppb (30) | 0.0 ppb (0) | 7.0 ppb (5) | 0.73 ppb (8) | 43.0 μg/m3 (39) | 17.0 μg/m3 (61) | 64.0 | |
| March 18, 2019, 2 p.m. | 89.8 ppb (88) | 53.1 ppb (49) | 84.7 ppb (83) | 37.0 ppb (34) | 33.5 ppb (31) | 0.0 ppb (0) | 2.0 ppb (2) | 0.9 ppb (10) | 49.0 μg/m3 (45) | 17.0 μg/m3 (61) | 88.0 | |
| March 18, 2019, 1 p.m. | 44.6 ppb (41) | 10.7 ppb (10) | 42.1 ppb (39) | 34.0 ppb (31) | 30.6 ppb (28) | 0.0 ppb (0) | 4.0 ppb (3) | 0.55 ppb (6) | 30.0 μg/m3 (27) | 14.0 μg/m3 (54) | 54.0 | |
| March 18, 2019, noon | 42.2 ppb (39) | 8.3 ppb (8) | 41.5 ppb (38) | 34.0 ppb (31) | 33.9 ppb (31) | 0.0 ppb (0) | 4.0 ppb (3) | 0.54 ppb (6) | 32.0 μg/m3 (29) | 13.0 μg/m3 (52) | 52.0 | |
| March 18, 2019, 11 a.m. | 36.5 ppb (34) | 4.7 ppb (4) | 38.3 ppb (35) | 32.0 ppb (30) | 32.2 ppb (30) | 0.0 ppb (0) | 4.0 ppb (3) | 0.43 ppb (5) | 29.0 μg/m3 (26) | 11.0 μg/m3 (46) | 46.0 | |
| March 18, 2019, 10 a.m. | 24.6 ppb (23) | 1.2 ppb (1) | 25.2 ppb (23) | 23.0 ppb (21) | 24.9 ppb (23) | 0.0 ppb (0) | 11.0 ppb (8) | 0.41 ppb (5) | 23.0 μg/m3 (21) | 12.0 μg/m3 (50) | 50.0 | |
| March 18, 2019, 9 a.m. | 22.8 ppb (21) | 0.9 ppb (1) | 23.9 ppb (22) | 22.0 ppb (20) | 23.8 ppb (22) | 0.0 ppb (0) | 16.0 ppb (12) | 0.41 ppb (5) | 27.0 μg/m3 (25) | 12.0 μg/m3 (50) | 50.0 |