Fresno CA, US: 36.785378, -119.773206
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 25, 2019, 3 a.m. | 15.5 ppb (14) | 0.4 ppb (0) | 14.9 ppb (14) | 15.0 ppb (14) | 14.6 ppb (14) | 0.0 ppb (0) | 24.0 ppb (18) | 0.4 ppb (4) | 30.0 μg/m3 (27) | 11.8 μg/m3 (49) | 49.0 | |
| March 25, 2019, 2 a.m. | 9.6 ppb (9) | 0.2 ppb (0) | 8.9 ppb (8) | 9.0 ppb (8) | 8.8 ppb (8) | 0.0 ppb (0) | 36.0 ppb (28) | 0.31 ppb (3) | 31.0 μg/m3 (28) | 12.9 μg/m3 (52) | 52.0 | |
| March 25, 2019, 1 a.m. | 4.2 ppb (4) | 0.2 ppb (0) | 3.7 ppb (3) | 4.0 ppb (4) | 3.5 ppb (3) | 0.0 ppb (0) | 49.0 ppb (38) | 0.21 ppb (2) | 18.0 μg/m3 (16) | 12.3 μg/m3 (51) | 51.0 | |
| March 25, 2019, midnight | 4.1 ppb (4) | 0.1 ppb (0) | 3.6 ppb (3) | 4.0 ppb (4) | 3.4 ppb (3) | 0.0 ppb (0) | 50.0 ppb (38) | 0.21 ppb (2) | 23.0 μg/m3 (21) | 11.5 μg/m3 (48) | 48.0 | |
| March 24, 2019, 11 p.m. | 4.6 ppb (4) | 0.3 ppb (0) | 4.1 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 49.0 ppb (38) | 0.22 ppb (2) | 24.0 μg/m3 (22) | 13.0 μg/m3 (52) | 52.0 | |
| March 24, 2019, 10 p.m. | 4.3 ppb (4) | 0.3 ppb (0) | 4.2 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 48.0 ppb (37) | 0.23 ppb (3) | 29.0 μg/m3 (26) | 13.4 μg/m3 (53) | 53.0 | |
| March 24, 2019, 9 p.m. | 4.7 ppb (4) | 0.4 ppb (0) | 4.6 ppb (4) | 4.0 ppb (4) | 3.9 ppb (4) | 0.0 ppb (0) | 47.0 ppb (36) | 0.22 ppb (2) | 21.0 μg/m3 (19) | 19.9 μg/m3 (67) | 67.0 | |
| March 24, 2019, 8 p.m. | 5.1 ppb (5) | 0.7 ppb (1) | 4.6 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 42.0 ppb (32) | 0.23 ppb (3) | 24.0 μg/m3 (22) | 10.5 μg/m3 (44) | 44.0 | |
| March 24, 2019, 7 p.m. | 4.8 ppb (4) | 0.6 ppb (1) | 4.8 ppb (4) | 4.0 ppb (4) | 3.7 ppb (3) | 0.0 ppb (0) | 35.0 ppb (27) | 0.23 ppb (3) | 19.0 μg/m3 (17) | 13.1 μg/m3 (52) | 52.0 | |
| March 24, 2019, 6 p.m. | 6.9 ppb (6) | 2.0 ppb (2) | 4.8 ppb (4) | 5.0 ppb (5) | 3.4 ppb (3) | 0.0 ppb (0) | 29.0 ppb (22) | 0.23 ppb (3) | 22.0 μg/m3 (20) | 14.4 μg/m3 (55) | 55.0 | |
| March 24, 2019, 5 p.m. | 5.8 ppb (5) | 1.2 ppb (1) | 4.7 ppb (4) | 5.0 ppb (5) | 3.2 ppb (3) | 0.0 ppb (0) | 26.0 ppb (20) | 0.23 ppb (3) | 26.0 μg/m3 (24) | 15.3 μg/m3 (57) | 57.0 | |
| March 24, 2019, 4 p.m. | 10.2 ppb (9) | 4.1 ppb (4) | 7.6 ppb (7) | 6.0 ppb (6) | 4.6 ppb (4) | 0.0 ppb (0) | 19.0 ppb (15) | 0.24 ppb (3) | 19.0 μg/m3 (17) | 7.6 μg/m3 (32) | 32.0 | |
| March 24, 2019, 3 p.m. | 15.1 ppb (14) | 5.4 ppb (5) | 14.0 ppb (13) | 10.0 ppb (9) | 8.1 ppb (8) | 0.0 ppb (0) | 10.0 ppb (8) | 0.28 ppb (3) | 16.0 μg/m3 (15) | 6.3 μg/m3 (26) | 26.0 | |
| March 24, 2019, 2 p.m. | 21.8 ppb (20) | 8.0 ppb (7) | 20.7 ppb (19) | 14.0 ppb (13) | 13.1 ppb (12) | 0.0 ppb (0) | 4.0 ppb (3) | 0.33 ppb (4) | 14.0 μg/m3 (13) | 5.0 μg/m3 (21) | 21.0 | |
| March 24, 2019, 1 p.m. | 15.9 ppb (15) | 2.9 ppb (3) | 14.3 ppb (13) | 13.0 ppb (12) | 11.6 ppb (11) | 0.0 ppb (0) | 5.0 ppb (4) | 0.29 ppb (3) | 13.0 μg/m3 (12) | 5.9 μg/m3 (25) | 25.0 | |
| March 24, 2019, noon | N/A | N/A | 13.0 ppb (12) | N/A | 11.9 ppb (11) | 0.0 ppb (0) | N/A | 0.22 ppb (2) | 10.0 μg/m3 (9) | 6.0 μg/m3 (25) | 25.0 | |
| March 24, 2019, 11 a.m. | 7.7 ppb (7) | 0.3 ppb (0) | 5.9 ppb (5) | 7.0 ppb (6) | 5.7 ppb (5) | 0.0 ppb (0) | 13.0 ppb (10) | 0.19 ppb (2) | 12.0 μg/m3 (11) | 4.8 μg/m3 (20) | 20.0 | |
| March 24, 2019, 10 a.m. | 5.4 ppb (5) | 0.2 ppb (0) | 3.4 ppb (3) | 5.0 ppb (5) | 3.3 ppb (3) | 0.0 ppb (0) | 18.0 ppb (14) | 0.18 ppb (2) | 12.0 μg/m3 (11) | 3.2 μg/m3 (13) | 14.0 | |
| March 24, 2019, 9 a.m. | 4.3 ppb (4) | 0.2 ppb (0) | 2.8 ppb (3) | 4.0 ppb (4) | 2.4 ppb (2) | 0.0 ppb (0) | 22.0 ppb (17) | 0.18 ppb (2) | 9.0 μg/m3 (8) | 3.5 μg/m3 (15) | 17.0 | |
| March 24, 2019, 8 a.m. | 3.3 ppb (3) | 0.2 ppb (0) | 1.3 ppb (1) | 3.0 ppb (3) | 1.2 ppb (1) | 0.0 ppb (0) | 26.0 ppb (20) | 0.18 ppb (2) | 13.0 μg/m3 (12) | 6.9 μg/m3 (29) | 29.0 | |
| March 24, 2019, 7 a.m. | 3.1 ppb (3) | 0.2 ppb (0) | 1.1 ppb (1) | 3.0 ppb (3) | 1.0 ppb (1) | 0.0 ppb (0) | 30.0 ppb (23) | 0.18 ppb (2) | 14.0 μg/m3 (13) | 10.9 μg/m3 (45) | 45.0 | |
| March 24, 2019, 6 a.m. | 4.8 ppb (4) | 0.1 ppb (0) | 3.0 ppb (3) | 5.0 ppb (5) | 3.0 ppb (3) | 0.0 ppb (0) | 32.0 ppb (25) | 0.22 ppb (2) | 19.0 μg/m3 (17) | 11.5 μg/m3 (48) | 48.0 | |
| March 24, 2019, 5 a.m. | 7.7 ppb (7) | 0.2 ppb (0) | 6.1 ppb (6) | 7.0 ppb (6) | 6.1 ppb (6) | 0.0 ppb (0) | 29.0 ppb (22) | 0.28 ppb (3) | 23.0 μg/m3 (21) | 9.7 μg/m3 (40) | 40.0 | |
| March 24, 2019, 4 a.m. | 8.2 ppb (8) | 0.3 ppb (0) | 6.8 ppb (6) | 8.0 ppb (7) | 6.6 ppb (6) | 0.0 ppb (0) | 32.0 ppb (25) | 0.31 ppb (3) | 26.0 μg/m3 (24) | 19.4 μg/m3 (66) | 66.0 | |
| March 24, 2019, 3 a.m. | 9.5 ppb (9) | 0.3 ppb (0) | 8.0 ppb (7) | 9.0 ppb (8) | 7.8 ppb (7) | 0.0 ppb (0) | 35.0 ppb (27) | 0.29 ppb (3) | 28.0 μg/m3 (25) | 10.3 μg/m3 (43) | 43.0 | |
| March 24, 2019, 2 a.m. | 5.5 ppb (5) | 0.1 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | 3.9 ppb (4) | 0.0 ppb (0) | 43.0 ppb (33) | 0.23 ppb (3) | 26.0 μg/m3 (24) | 16.2 μg/m3 (59) | 59.0 | |
| March 24, 2019, 1 a.m. | 2.9 ppb (3) | 0.2 ppb (0) | 1.4 ppb (1) | 3.0 ppb (3) | 1.2 ppb (1) | 0.0 ppb (0) | 47.0 ppb (36) | 0.21 ppb (2) | 32.0 μg/m3 (29) | 20.5 μg/m3 (68) | 68.0 | |
| March 24, 2019, midnight | 2.5 ppb (2) | 0.3 ppb (0) | 0.8 ppb (1) | 2.0 ppb (2) | 0.6 ppb (1) | 0.0 ppb (0) | 48.0 ppb (37) | 0.2 ppb (2) | 20.0 μg/m3 (18) | 12.1 μg/m3 (50) | 50.0 | |
| March 23, 2019, 11 p.m. | 2.4 ppb (2) | 0.3 ppb (0) | 0.6 ppb (1) | 2.0 ppb (2) | 0.3 ppb (0) | 0.0 ppb (0) | 47.0 ppb (36) | 0.2 ppb (2) | 18.0 μg/m3 (16) | 11.2 μg/m3 (47) | 47.0 | |
| March 23, 2019, 10 p.m. | 2.2 ppb (2) | 0.2 ppb (0) | 0.3 ppb (0) | 2.0 ppb (2) | 0.1 ppb (0) | 0.0 ppb (0) | 48.0 ppb (37) | 0.2 ppb (2) | 18.0 μg/m3 (16) | 6.1 μg/m3 (25) | 37.0 | |
| March 23, 2019, 9 p.m. | 2.2 ppb (2) | 0.3 ppb (0) | -0.1 ppb (0) | 2.0 ppb (2) | -0.3 ppb (0) | 0.0 ppb (0) | 43.0 ppb (33) | 0.18 ppb (2) | 14.0 μg/m3 (13) | 3.1 μg/m3 (13) | 33.0 | |
| March 23, 2019, 8 p.m. | 2.6 ppb (2) | 0.4 ppb (0) | 0.0 ppb (0) | 2.0 ppb (2) | -0.4 ppb (0) | 0.0 ppb (0) | 39.0 ppb (30) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 5.2 μg/m3 (22) | 30.0 | |
| March 23, 2019, 7 p.m. | 2.9 ppb (3) | 0.6 ppb (1) | 0.4 ppb (0) | 2.0 ppb (2) | -0.2 ppb (0) | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 9.0 μg/m3 (8) | 5.8 μg/m3 (24) | 28.0 | |
| March 23, 2019, 6 p.m. | 4.0 ppb (4) | 0.9 ppb (1) | 1.4 ppb (1) | 3.0 ppb (3) | 0.6 ppb (1) | 0.0 ppb (0) | 35.0 ppb (27) | 0.17 ppb (2) | 11.0 μg/m3 (10) | 1.5 μg/m3 (6) | 27.0 | |
| March 23, 2019, 5 p.m. | 3.6 ppb (3) | 0.5 ppb (0) | 1.2 ppb (1) | 3.0 ppb (3) | 0.8 ppb (1) | 0.0 ppb (0) | 32.0 ppb (25) | 0.18 ppb (2) | 6.0 μg/m3 (5) | 0.5 μg/m3 (2) | 25.0 | |
| March 23, 2019, 4 p.m. | 5.4 ppb (5) | 0.5 ppb (0) | 3.2 ppb (3) | 5.0 ppb (5) | 2.8 ppb (3) | 0.0 ppb (0) | 27.0 ppb (21) | 0.19 ppb (2) | 9.0 μg/m3 (8) | 1.9 μg/m3 (8) | 21.0 | |
| March 23, 2019, 3 p.m. | 6.5 ppb (6) | 0.5 ppb (0) | 4.2 ppb (4) | 6.0 ppb (6) | 3.7 ppb (3) | 0.0 ppb (0) | 25.0 ppb (19) | 0.2 ppb (2) | 8.0 μg/m3 (7) | 0.8 μg/m3 (3) | 19.0 | |
| March 23, 2019, 2 p.m. | 6.7 ppb (6) | 0.4 ppb (0) | 4.6 ppb (4) | 6.0 ppb (6) | 4.3 ppb (4) | 0.0 ppb (0) | 24.0 ppb (18) | 0.22 ppb (2) | 8.0 μg/m3 (7) | 2.0 μg/m3 (8) | 18.0 | |
| March 23, 2019, 1 p.m. | 3.5 ppb (3) | 0.1 ppb (0) | 1.2 ppb (1) | 3.0 ppb (3) | 1.2 ppb (1) | 0.0 ppb (0) | 29.0 ppb (22) | 0.18 ppb (2) | 2.0 μg/m3 (2) | 3.9 μg/m3 (16) | 22.0 | |
| March 23, 2019, noon | N/A | N/A | -0.3 ppb (0) | N/A | -0.3 ppb (0) | 0.0 ppb (0) | N/A | 0.15 ppb (2) | 4.0 μg/m3 (4) | 4.7 μg/m3 (20) | 20.0 | |
| March 23, 2019, 11 a.m. | 1.8 ppb (2) | 0.1 ppb (0) | -0.4 ppb (0) | 2.0 ppb (2) | -0.4 ppb (0) | 0.0 ppb (0) | 32.0 ppb (25) | 0.15 ppb (2) | 6.0 μg/m3 (5) | 2.8 μg/m3 (12) | 25.0 | |
| March 23, 2019, 10 a.m. | 2.1 ppb (2) | 0.1 ppb (0) | 0.1 ppb (0) | 2.0 ppb (2) | 0.1 ppb (0) | 0.0 ppb (0) | 27.0 ppb (21) | 0.16 ppb (2) | 3.0 μg/m3 (3) | 3.4 μg/m3 (14) | 21.0 | |
| March 23, 2019, 9 a.m. | 3.0 ppb (3) | 0.2 ppb (0) | 1.3 ppb (1) | 3.0 ppb (3) | 1.3 ppb (1) | 0.0 ppb (0) | 24.0 ppb (18) | 0.17 ppb (2) | 16.0 μg/m3 (15) | 5.7 μg/m3 (24) | 24.0 | |
| March 23, 2019, 8 a.m. | 4.4 ppb (4) | 0.2 ppb (0) | 3.1 ppb (3) | 4.0 ppb (4) | 3.1 ppb (3) | 0.0 ppb (0) | 24.0 ppb (18) | 0.2 ppb (2) | 13.0 μg/m3 (12) | 6.2 μg/m3 (26) | 26.0 | |
| March 23, 2019, 7 a.m. | 9.0 ppb (8) | 0.3 ppb (0) | 7.9 ppb (7) | 9.0 ppb (8) | 7.9 ppb (7) | 0.0 ppb (0) | 23.0 ppb (18) | 0.27 ppb (3) | 17.0 μg/m3 (15) | 5.6 μg/m3 (23) | 23.0 | |
| March 23, 2019, 6 a.m. | 9.8 ppb (9) | 0.3 ppb (0) | 8.8 ppb (8) | 9.0 ppb (8) | 8.7 ppb (8) | 0.0 ppb (0) | 25.0 ppb (19) | 0.3 ppb (3) | 16.0 μg/m3 (15) | 5.8 μg/m3 (24) | 24.0 | |
| March 23, 2019, 5 a.m. | 9.3 ppb (9) | 0.2 ppb (0) | 8.5 ppb (8) | 9.0 ppb (8) | 8.5 ppb (8) | 0.0 ppb (0) | 28.0 ppb (22) | 0.29 ppb (3) | 21.0 μg/m3 (19) | 7.7 μg/m3 (32) | 32.0 | |
| March 23, 2019, 4 a.m. | 11.0 ppb (10) | 0.2 ppb (0) | 10.2 ppb (9) | 11.0 ppb (10) | 10.1 ppb (9) | 0.0 ppb (0) | 28.0 ppb (22) | 0.33 ppb (4) | 27.0 μg/m3 (25) | 6.2 μg/m3 (26) | 26.0 | |
| March 23, 2019, 3 a.m. | 8.3 ppb (8) | 0.2 ppb (0) | 7.5 ppb (7) | 8.0 ppb (7) | 7.4 ppb (7) | 0.0 ppb (0) | 33.0 ppb (25) | 0.27 ppb (3) | 16.0 μg/m3 (15) | 5.3 μg/m3 (22) | 25.0 | |
| March 23, 2019, 2 a.m. | 7.2 ppb (7) | 0.2 ppb (0) | 6.2 ppb (6) | 7.0 ppb (6) | 6.2 ppb (6) | 0.0 ppb (0) | 39.0 ppb (30) | 0.23 ppb (3) | 21.0 μg/m3 (19) | 7.4 μg/m3 (31) | 31.0 | |
| March 23, 2019, 1 a.m. | 4.8 ppb (4) | 0.2 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | 3.9 ppb (4) | 0.0 ppb (0) | 45.0 ppb (35) | 0.2 ppb (2) | 16.0 μg/m3 (15) | 8.1 μg/m3 (34) | 35.0 | |
| March 23, 2019, midnight | 4.1 ppb (4) | 0.3 ppb (0) | 3.6 ppb (3) | 4.0 ppb (4) | 3.4 ppb (3) | 0.0 ppb (0) | 47.0 ppb (36) | 0.19 ppb (2) | 17.0 μg/m3 (15) | 5.8 μg/m3 (24) | 36.0 | |
| March 22, 2019, 11 p.m. | 4.9 ppb (5) | 0.6 ppb (1) | 4.7 ppb (4) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 46.0 ppb (35) | 0.2 ppb (2) | 19.0 μg/m3 (17) | 1.0 μg/m3 (4) | 35.0 | |
| March 22, 2019, 10 p.m. | 4.7 ppb (4) | 0.6 ppb (1) | 4.2 ppb (4) | 4.0 ppb (4) | 3.7 ppb (3) | 0.0 ppb (0) | 45.0 ppb (35) | 0.19 ppb (2) | 20.0 μg/m3 (18) | 2.0 μg/m3 (8) | 35.0 | |
| March 22, 2019, 9 p.m. | 6.6 ppb (6) | 1.0 ppb (1) | 5.8 ppb (5) | 6.0 ppb (6) | 4.8 ppb (4) | 0.0 ppb (0) | 42.0 ppb (32) | 0.2 ppb (2) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 32.0 | |
| March 22, 2019, 8 p.m. | 5.3 ppb (5) | 0.9 ppb (1) | 4.7 ppb (4) | 4.0 ppb (4) | 3.9 ppb (4) | 0.0 ppb (0) | 43.0 ppb (33) | 0.19 ppb (2) | 12.0 μg/m3 (11) | 7.3 μg/m3 (30) | 33.0 | |
| March 22, 2019, 7 p.m. | 6.6 ppb (6) | 1.6 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.19 ppb (2) | 18.0 μg/m3 (16) | 10.6 μg/m3 (44) | 44.0 | |
| March 22, 2019, 6 p.m. | 9.5 ppb (9) | 2.8 ppb (3) | 9.3 ppb (9) | 7.0 ppb (6) | 6.1 ppb (6) | N/A | 31.0 ppb (24) | N/A | 20.0 μg/m3 (18) | 11.8 μg/m3 (49) | 49.0 | |
| March 22, 2019, 5 p.m. | 23.0 ppb (21) | 8.4 ppb (8) | 24.4 ppb (23) | 15.0 ppb (14) | 14.9 ppb (14) | 1.0 ppb (1) | 18.0 ppb (14) | 0.34 ppb (4) | 35.0 μg/m3 (32) | 16.1 μg/m3 (59) | 59.0 | |
| March 22, 2019, 4 p.m. | 41.3 ppb (38) | 21.2 ppb (20) | 44.5 ppb (41) | 20.0 ppb (19) | 20.2 ppb (19) | 0.0 ppb (0) | 8.0 ppb (6) | 0.54 ppb (6) | 55.0 μg/m3 (50) | 11.0 μg/m3 (46) | 50.0 | |
| March 22, 2019, 3 p.m. | 33.4 ppb (31) | 15.1 ppb (14) | 34.6 ppb (32) | 18.0 ppb (17) | 18.1 ppb (17) | 0.0 ppb (0) | 7.0 ppb (5) | 0.52 ppb (6) | 26.0 μg/m3 (24) | 7.9 μg/m3 (33) | 33.0 | |
| March 22, 2019, 2 p.m. | 53.2 ppb (49) | 35.8 ppb (33) | 54.4 ppb (50) | 18.0 ppb (17) | 17.8 ppb (16) | 0.0 ppb (0) | 2.0 ppb (2) | 0.87 ppb (10) | 30.0 μg/m3 (27) | 8.6 μg/m3 (36) | 50.0 | |
| March 22, 2019, 1 p.m. | 25.5 ppb (24) | 10.5 ppb (10) | 24.5 ppb (23) | 15.0 ppb (14) | 14.6 ppb (14) | 0.0 ppb (0) | 2.0 ppb (2) | 0.45 ppb (5) | 17.0 μg/m3 (15) | 6.6 μg/m3 (28) | 28.0 | |
| March 22, 2019, noon | N/A | N/A | 11.6 ppb (11) | N/A | 10.4 ppb (10) | 0.0 ppb (0) | N/A | 0.31 ppb (3) | 8.0 μg/m3 (7) | 4.1 μg/m3 (17) | 17.0 | |
| March 22, 2019, 11 a.m. | 7.8 ppb (7) | 0.3 ppb (0) | 6.5 ppb (6) | 7.0 ppb (6) | 6.3 ppb (6) | 0.0 ppb (0) | 13.0 ppb (10) | 0.2 ppb (2) | 9.0 μg/m3 (8) | 9.3 μg/m3 (39) | 39.0 | |
| March 22, 2019, 10 a.m. | 8.4 ppb (8) | 0.3 ppb (0) | 6.4 ppb (6) | 8.0 ppb (7) | 6.3 ppb (6) | 0.0 ppb (0) | 15.0 ppb (12) | 0.19 ppb (2) | 12.0 μg/m3 (11) | 5.6 μg/m3 (23) | 23.0 | |
| March 22, 2019, 9 a.m. | 8.4 ppb (8) | 0.2 ppb (0) | 6.4 ppb (6) | 8.0 ppb (7) | 6.3 ppb (6) | 0.0 ppb (0) | 17.0 ppb (13) | 0.19 ppb (2) | 13.0 μg/m3 (12) | -0.2 μg/m3 (0) | 13.0 | |
| March 22, 2019, 8 a.m. | 7.7 ppb (7) | 0.2 ppb (0) | 5.8 ppb (5) | 8.0 ppb (7) | 5.8 ppb (5) | 0.0 ppb (0) | 22.0 ppb (17) | 0.19 ppb (2) | 13.0 μg/m3 (12) | 2.8 μg/m3 (12) | 17.0 | |
| March 22, 2019, 7 a.m. | 7.7 ppb (7) | 0.2 ppb (0) | 5.8 ppb (5) | 8.0 ppb (7) | 5.8 ppb (5) | 0.0 ppb (0) | 23.0 ppb (18) | 0.21 ppb (2) | 15.0 μg/m3 (14) | 6.9 μg/m3 (29) | 29.0 | |
| March 22, 2019, 6 a.m. | 22.4 ppb (21) | 1.6 ppb (1) | 20.9 ppb (19) | 21.0 ppb (19) | 19.7 ppb (18) | 0.0 ppb (0) | 11.0 ppb (8) | 0.42 ppb (5) | 25.0 μg/m3 (23) | 9.6 μg/m3 (40) | 40.0 | |
| March 22, 2019, 5 a.m. | 30.9 ppb (29) | 4.1 ppb (4) | 27.6 ppb (26) | 27.0 ppb (25) | 23.9 ppb (22) | 0.0 ppb (0) | 5.0 ppb (4) | 0.48 ppb (5) | 19.0 μg/m3 (17) | 7.6 μg/m3 (32) | 32.0 | |
| March 22, 2019, 4 a.m. | 18.6 ppb (17) | 1.7 ppb (2) | 16.2 ppb (15) | 17.0 ppb (16) | 15.0 ppb (14) | 0.0 ppb (0) | 15.0 ppb (12) | 0.38 ppb (4) | 13.0 μg/m3 (12) | 4.8 μg/m3 (20) | 20.0 | |
| March 22, 2019, 3 a.m. | 12.0 ppb (11) | 0.5 ppb (0) | 10.7 ppb (10) | 12.0 ppb (11) | 10.2 ppb (9) | 0.0 ppb (0) | 26.0 ppb (20) | 0.31 ppb (3) | 12.0 μg/m3 (11) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 2 a.m. | 6.2 ppb (6) | 0.1 ppb (0) | 4.8 ppb (4) | 6.0 ppb (6) | 4.7 ppb (4) | 0.0 ppb (0) | 38.0 ppb (29) | 0.22 ppb (2) | 10.0 μg/m3 (9) | 3.5 μg/m3 (15) | 29.0 | |
| March 22, 2019, 1 a.m. | 3.4 ppb (3) | 0.2 ppb (0) | 1.8 ppb (2) | 3.0 ppb (3) | 1.7 ppb (2) | 0.0 ppb (0) | 44.0 ppb (34) | 0.18 ppb (2) | 15.0 μg/m3 (14) | 4.1 μg/m3 (17) | 34.0 | |
| March 22, 2019, midnight | 3.2 ppb (3) | 0.3 ppb (0) | 1.6 ppb (1) | 3.0 ppb (3) | 1.4 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.18 ppb (2) | 11.0 μg/m3 (10) | 6.3 μg/m3 (26) | 34.0 | |
| March 21, 2019, 11 p.m. | 2.5 ppb (2) | 0.3 ppb (0) | 0.6 ppb (1) | 2.0 ppb (2) | 0.4 ppb (0) | 0.0 ppb (0) | 44.0 ppb (34) | 0.17 ppb (2) | 12.0 μg/m3 (11) | 5.6 μg/m3 (23) | 34.0 | |
| March 21, 2019, 10 p.m. | 2.6 ppb (2) | 0.3 ppb (0) | 0.7 ppb (1) | 2.0 ppb (2) | 0.5 ppb (0) | 0.0 ppb (0) | 44.0 ppb (34) | 0.17 ppb (2) | 10.0 μg/m3 (9) | 2.0 μg/m3 (8) | 34.0 | |
| March 21, 2019, 9 p.m. | 2.2 ppb (2) | 0.3 ppb (0) | 0.1 ppb (0) | 2.0 ppb (2) | 0.0 ppb (0) | 0.0 ppb (0) | 43.0 ppb (33) | 0.16 ppb (2) | 10.0 μg/m3 (9) | 2.0 μg/m3 (8) | 33.0 | |
| March 21, 2019, 8 p.m. | 2.6 ppb (2) | 0.4 ppb (0) | 0.6 ppb (1) | 2.0 ppb (2) | 0.3 ppb (0) | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 9.0 μg/m3 (8) | 6.7 μg/m3 (28) | 28.0 | |
| March 21, 2019, 7 p.m. | 3.6 ppb (3) | 0.7 ppb (1) | 1.7 ppb (2) | 3.0 ppb (3) | 1.2 ppb (1) | 0.0 ppb (0) | 34.0 ppb (26) | 0.18 ppb (2) | 8.0 μg/m3 (7) | 5.8 μg/m3 (24) | 26.0 | |
| March 21, 2019, 6 p.m. | 6.2 ppb (6) | 1.3 ppb (1) | 4.9 ppb (5) | 5.0 ppb (5) | 3.6 ppb (3) | 0.0 ppb (0) | 28.0 ppb (22) | 0.21 ppb (2) | 10.0 μg/m3 (9) | 7.2 μg/m3 (30) | 30.0 | |
| March 21, 2019, 5 p.m. | 7.9 ppb (7) | 2.3 ppb (2) | 6.8 ppb (6) | 6.0 ppb (6) | 4.4 ppb (4) | 0.0 ppb (0) | 22.0 ppb (17) | 0.23 ppb (3) | 15.0 μg/m3 (14) | 8.3 μg/m3 (35) | 35.0 | |
| March 21, 2019, 4 p.m. | 9.4 ppb (9) | 3.0 ppb (3) | 8.0 ppb (7) | 6.0 ppb (6) | 5.0 ppb (5) | 0.0 ppb (0) | 18.0 ppb (14) | 0.25 ppb (3) | 16.0 μg/m3 (15) | 6.2 μg/m3 (26) | 26.0 | |
| March 21, 2019, 3 p.m. | 13.0 ppb (12) | 3.3 ppb (3) | 11.6 ppb (11) | 10.0 ppb (9) | 8.4 ppb (8) | 0.0 ppb (0) | 10.0 ppb (8) | 0.28 ppb (3) | 13.0 μg/m3 (12) | 5.2 μg/m3 (22) | 22.0 | |
| March 21, 2019, 2 p.m. | 14.9 ppb (14) | 2.3 ppb (2) | 13.4 ppb (12) | 13.0 ppb (12) | 11.3 ppb (10) | 0.0 ppb (0) | 6.0 ppb (5) | 0.29 ppb (3) | 11.0 μg/m3 (10) | 5.2 μg/m3 (22) | 22.0 | |
| March 21, 2019, 1 p.m. | 12.4 ppb (11) | 0.8 ppb (1) | 10.9 ppb (10) | 12.0 ppb (11) | 10.4 ppb (10) | 0.0 ppb (0) | 8.0 ppb (6) | 0.24 ppb (3) | 11.0 μg/m3 (10) | 2.3 μg/m3 (10) | 11.0 | |
| March 21, 2019, noon | N/A | N/A | 13.5 ppb (12) | N/A | 13.1 ppb (12) | 0.0 ppb (0) | N/A | 0.24 ppb (3) | 12.0 μg/m3 (11) | 3.5 μg/m3 (15) | 15.0 | |
| March 21, 2019, 11 a.m. | 9.5 ppb (9) | 0.3 ppb (0) | 7.1 ppb (7) | 9.0 ppb (8) | 7.0 ppb (6) | 0.0 ppb (0) | 11.0 ppb (8) | 0.21 ppb (2) | 10.0 μg/m3 (9) | 4.7 μg/m3 (20) | 20.0 | |
| March 21, 2019, 10 a.m. | 7.3 ppb (7) | 0.3 ppb (0) | 5.2 ppb (5) | 7.0 ppb (6) | 5.1 ppb (5) | 0.0 ppb (0) | 15.0 ppb (12) | 0.18 ppb (2) | 7.0 μg/m3 (6) | 5.4 μg/m3 (23) | 23.0 | |
| March 21, 2019, 9 a.m. | 5.7 ppb (5) | 0.2 ppb (0) | 3.3 ppb (3) | 5.0 ppb (5) | 3.3 ppb (3) | 0.0 ppb (0) | 21.0 ppb (16) | 0.17 ppb (2) | 10.0 μg/m3 (9) | 5.6 μg/m3 (23) | 23.0 | |
| March 21, 2019, 8 a.m. | 6.2 ppb (6) | 0.2 ppb (0) | 3.9 ppb (4) | 6.0 ppb (6) | 3.9 ppb (4) | 0.0 ppb (0) | 23.0 ppb (18) | 0.17 ppb (2) | 9.0 μg/m3 (8) | 1.9 μg/m3 (8) | 18.0 | |
| March 21, 2019, 7 a.m. | 5.7 ppb (5) | 0.2 ppb (0) | 3.4 ppb (3) | 6.0 ppb (6) | 3.4 ppb (3) | 0.0 ppb (0) | 27.0 ppb (21) | 0.19 ppb (2) | 4.0 μg/m3 (4) | 3.3 μg/m3 (14) | 21.0 | |
| March 21, 2019, 6 a.m. | 25.1 ppb (23) | 2.1 ppb (2) | 23.9 ppb (22) | 23.0 ppb (21) | 22.2 ppb (21) | 0.0 ppb (0) | 9.0 ppb (7) | 0.45 ppb (5) | 15.0 μg/m3 (14) | 6.9 μg/m3 (29) | 29.0 | |
| March 21, 2019, 5 a.m. | 27.2 ppb (25) | 2.0 ppb (2) | 27.0 ppb (25) | 25.0 ppb (23) | 23.7 ppb (22) | 0.0 ppb (0) | 9.0 ppb (7) | 0.49 ppb (5) | 15.0 μg/m3 (14) | 3.8 μg/m3 (16) | 25.0 | |
| March 21, 2019, 4 a.m. | 22.2 ppb (21) | 3.4 ppb (3) | 21.4 ppb (20) | 19.0 ppb (18) | 17.6 ppb (16) | 0.0 ppb (0) | 16.0 ppb (12) | 0.4 ppb (4) | 11.0 μg/m3 (10) | 1.5 μg/m3 (6) | 21.0 | |
| March 21, 2019, 3 a.m. | 9.1 ppb (8) | 0.2 ppb (0) | 6.8 ppb (6) | 9.0 ppb (8) | 6.7 ppb (6) | 0.0 ppb (0) | 28.0 ppb (22) | 0.25 ppb (3) | 7.0 μg/m3 (6) | 2.8 μg/m3 (12) | 22.0 | |
| March 21, 2019, 2 a.m. | 5.6 ppb (5) | 0.2 ppb (0) | 3.1 ppb (3) | 5.0 ppb (5) | 3.0 ppb (3) | 0.0 ppb (0) | 35.0 ppb (27) | 0.21 ppb (2) | 11.0 μg/m3 (10) | 0.6 μg/m3 (2) | 27.0 | |
| March 21, 2019, 1 a.m. | 3.7 ppb (3) | 0.4 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.18 ppb (2) | 1.0 μg/m3 (1) | -0.2 μg/m3 (0) | 29.0 | |
| March 21, 2019, midnight | 2.9 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.18 ppb (2) | 3.0 μg/m3 (3) | 0.6 μg/m3 (2) | 31.0 | |
| March 20, 2019, 11 p.m. | 2.6 ppb (2) | 0.4 ppb (0) | 0.2 ppb (0) | 2.0 ppb (2) | -0.1 ppb (0) | N/A | 39.0 ppb (30) | N/A | 6.0 μg/m3 (5) | 4.3 μg/m3 (18) | 30.0 | |
| March 20, 2019, 10 p.m. | 3.4 ppb (3) | 0.4 ppb (0) | 0.9 ppb (1) | 3.0 ppb (3) | 0.7 ppb (1) | 0.0 ppb (0) | 43.0 ppb (33) | 0.17 ppb (2) | 10.0 μg/m3 (9) | 3.3 μg/m3 (14) | 33.0 | |
| March 20, 2019, 9 p.m. | 4.1 ppb (4) | 0.6 ppb (1) | 1.8 ppb (2) | 4.0 ppb (4) | 1.3 ppb (1) | 0.0 ppb (0) | 43.0 ppb (33) | 0.18 ppb (2) | 1.0 μg/m3 (1) | -1.8 μg/m3 (0) | 33.0 | |
| March 20, 2019, 8 p.m. | 4.2 ppb (4) | 0.7 ppb (1) | 1.8 ppb (2) | 4.0 ppb (4) | 1.2 ppb (1) | 0.0 ppb (0) | 41.0 ppb (32) | 0.17 ppb (2) | 3.0 μg/m3 (3) | 1.8 μg/m3 (8) | 32.0 | |
| March 20, 2019, 7 p.m. | 3.3 ppb (3) | 0.3 ppb (0) | 1.2 ppb (1) | 3.0 ppb (3) | 1.0 ppb (1) | 0.0 ppb (0) | 41.0 ppb (32) | 0.17 ppb (2) | 5.0 μg/m3 (5) | 3.1 μg/m3 (13) | 32.0 | |
| March 20, 2019, 6 p.m. | 2.9 ppb (3) | 0.3 ppb (0) | 0.7 ppb (1) | 3.0 ppb (3) | 0.5 ppb (0) | 0.0 ppb (0) | 42.0 ppb (32) | 0.16 ppb (2) | 7.0 μg/m3 (6) | 2.6 μg/m3 (11) | 32.0 | |
| March 20, 2019, 5 p.m. | 4.0 ppb (4) | 0.8 ppb (1) | 2.3 ppb (2) | 3.0 ppb (3) | 1.3 ppb (1) | 0.0 ppb (0) | 40.0 ppb (31) | 0.16 ppb (2) | 10.0 μg/m3 (9) | 4.4 μg/m3 (18) | 31.0 | |
| March 20, 2019, 4 p.m. | 8.7 ppb (8) | 1.7 ppb (2) | 6.4 ppb (6) | 7.0 ppb (6) | 4.6 ppb (4) | 0.0 ppb (0) | 37.0 ppb (28) | 0.19 ppb (2) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 28.0 | |
| March 20, 2019, 3 p.m. | 18.6 ppb (17) | 3.9 ppb (4) | 16.8 ppb (16) | 15.0 ppb (14) | 13.0 ppb (12) | 0.0 ppb (0) | 26.0 ppb (20) | 0.3 ppb (3) | 14.0 μg/m3 (13) | 7.3 μg/m3 (30) | 30.0 | |
| March 20, 2019, 2 p.m. | 20.7 ppb (19) | 4.5 ppb (4) | 18.4 ppb (17) | 16.0 ppb (15) | 13.7 ppb (13) | 0.0 ppb (0) | 19.0 ppb (15) | 0.3 ppb (3) | 19.0 μg/m3 (17) | 8.0 μg/m3 (33) | 33.0 | |
| March 20, 2019, 1 p.m. | 10.5 ppb (10) | 0.9 ppb (1) | 9.1 ppb (8) | 10.0 ppb (9) | 8.3 ppb (8) | 0.0 ppb (0) | 24.0 ppb (18) | 0.22 ppb (2) | 10.0 μg/m3 (9) | 6.6 μg/m3 (28) | 28.0 | |
| March 20, 2019, noon | N/A | N/A | 7.6 ppb (7) | N/A | 5.8 ppb (5) | 0.0 ppb (0) | N/A | 0.2 ppb (2) | 18.0 μg/m3 (16) | 5.3 μg/m3 (22) | 22.0 | |
| March 20, 2019, 11 a.m. | 4.6 ppb (4) | 0.4 ppb (0) | 2.6 ppb (2) | 4.0 ppb (4) | 2.3 ppb (2) | 0.0 ppb (0) | 30.0 ppb (23) | 0.16 ppb (2) | 9.0 μg/m3 (8) | 4.8 μg/m3 (20) | 23.0 | |
| March 20, 2019, 10 a.m. | 3.8 ppb (4) | 0.2 ppb (0) | 1.9 ppb (2) | 4.0 ppb (4) | 1.9 ppb (2) | 0.0 ppb (0) | 30.0 ppb (23) | 0.16 ppb (2) | 15.0 μg/m3 (14) | 4.1 μg/m3 (17) | 23.0 | |
| March 20, 2019, 9 a.m. | 5.5 ppb (5) | 1.0 ppb (1) | 3.9 ppb (4) | 5.0 ppb (5) | 2.6 ppb (2) | 0.0 ppb (0) | 30.0 ppb (23) | 0.16 ppb (2) | 18.0 μg/m3 (16) | 6.3 μg/m3 (26) | 26.0 | |
| March 20, 2019, 8 a.m. | 3.7 ppb (3) | 0.2 ppb (0) | 1.9 ppb (2) | 4.0 ppb (4) | 1.9 ppb (2) | 0.0 ppb (0) | 32.0 ppb (25) | 0.16 ppb (2) | 20.0 μg/m3 (18) | 4.2 μg/m3 (18) | 25.0 | |
| March 20, 2019, 7 a.m. | 6.7 ppb (6) | 1.8 ppb (2) | 3.7 ppb (3) | 5.0 ppb (5) | 2.4 ppb (2) | 0.0 ppb (0) | 36.0 ppb (28) | 0.17 ppb (2) | 11.0 μg/m3 (10) | 4.3 μg/m3 (18) | 28.0 | |
| March 20, 2019, 6 a.m. | 2.3 ppb (2) | 0.1 ppb (0) | 0.5 ppb (0) | 2.0 ppb (2) | 0.5 ppb (0) | 0.0 ppb (0) | 43.0 ppb (33) | 0.14 ppb (2) | 20.0 μg/m3 (18) | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, 5 a.m. | 2.5 ppb (2) | 0.1 ppb (0) | 0.9 ppb (1) | 2.0 ppb (2) | 0.9 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.15 ppb (2) | 23.0 μg/m3 (21) | 16.4 μg/m3 (59) | 59.0 | |
| March 20, 2019, 4 a.m. | 3.0 ppb (3) | 0.1 ppb (0) | 1.4 ppb (1) | 3.0 ppb (3) | 1.4 ppb (1) | 0.0 ppb (0) | 44.0 ppb (34) | 0.16 ppb (2) | 83.0 μg/m3 (64) | 1.2 μg/m3 (5) | 64.0 | |
| March 20, 2019, 3 a.m. | 7.1 ppb (7) | 0.1 ppb (0) | 5.8 ppb (5) | 7.0 ppb (6) | 5.8 ppb (5) | 0.0 ppb (0) | 36.0 ppb (28) | 0.19 ppb (2) | 28.0 μg/m3 (25) | 5.2 μg/m3 (22) | 28.0 | |
| March 20, 2019, 2 a.m. | 11.3 ppb (10) | 0.6 ppb (1) | 10.7 ppb (10) | 11.0 ppb (10) | 10.2 ppb (9) | 0.0 ppb (0) | 40.0 ppb (31) | 0.23 ppb (3) | 44.0 μg/m3 (40) | 8.4 μg/m3 (35) | 40.0 | |
| March 20, 2019, 1 a.m. | 8.8 ppb (8) | 0.4 ppb (0) | 8.1 ppb (8) | 8.0 ppb (7) | 7.8 ppb (7) | 0.0 ppb (0) | 46.0 ppb (35) | 0.23 ppb (3) | 26.0 μg/m3 (24) | 4.7 μg/m3 (20) | 35.0 | |
| March 20, 2019, midnight | 9.0 ppb (8) | 1.2 ppb (1) | 7.8 ppb (7) | 8.0 ppb (7) | 6.8 ppb (6) | 0.0 ppb (0) | 49.0 ppb (38) | 0.19 ppb (2) | 24.0 μg/m3 (22) | 5.5 μg/m3 (23) | 38.0 | |
| March 19, 2019, 11 p.m. | 7.1 ppb (7) | 1.3 ppb (1) | 6.0 ppb (6) | 6.0 ppb (6) | 5.0 ppb (5) | 0.0 ppb (0) | 51.0 ppb (39) | 0.17 ppb (2) | 22.0 μg/m3 (20) | 5.9 μg/m3 (25) | 39.0 | |
| March 19, 2019, 10 p.m. | 4.6 ppb (4) | 0.4 ppb (0) | 4.7 ppb (4) | 4.0 ppb (4) | 4.3 ppb (4) | 0.0 ppb (0) | 54.0 ppb (42) | 0.17 ppb (2) | 28.0 μg/m3 (25) | 2.6 μg/m3 (11) | 42.0 | |
| March 19, 2019, 9 p.m. | 4.5 ppb (4) | 0.5 ppb (0) | 4.8 ppb (4) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 53.0 ppb (41) | 0.16 ppb (2) | 22.0 μg/m3 (20) | 2.9 μg/m3 (12) | 41.0 | |
| March 19, 2019, 8 p.m. | 6.7 ppb (6) | 1.0 ppb (1) | 6.5 ppb (6) | 6.0 ppb (6) | 5.6 ppb (5) | 0.0 ppb (0) | 49.0 ppb (38) | 0.18 ppb (2) | 31.0 μg/m3 (28) | 8.9 μg/m3 (37) | 38.0 | |
| March 19, 2019, 7 p.m. | 6.9 ppb (6) | 1.3 ppb (1) | 7.2 ppb (7) | 6.0 ppb (6) | 6.0 ppb (6) | 0.0 ppb (0) | 43.0 ppb (33) | 0.21 ppb (2) | 26.0 μg/m3 (24) | 13.5 μg/m3 (53) | 53.0 | |
| March 19, 2019, 6 p.m. | 11.0 ppb (10) | 3.5 ppb (3) | 10.4 ppb (10) | 8.0 ppb (7) | 8.2 ppb (8) | 1.0 ppb (1) | 31.0 ppb (24) | 0.23 ppb (3) | 38.0 μg/m3 (35) | 11.9 μg/m3 (50) | 50.0 | |
| March 19, 2019, 5 p.m. | 12.0 ppb (11) | 3.2 ppb (3) | 12.0 ppb (11) | 9.0 ppb (8) | 8.8 ppb (8) | 1.0 ppb (1) | 24.0 ppb (18) | 0.24 ppb (3) | 31.0 μg/m3 (28) | 10.9 μg/m3 (45) | 45.0 | |
| March 19, 2019, 4 p.m. | 19.3 ppb (18) | 7.2 ppb (7) | 17.8 ppb (16) | 12.0 ppb (11) | 11.9 ppb (11) | 1.0 ppb (1) | 19.0 ppb (15) | 0.25 ppb (3) | 39.0 μg/m3 (35) | 9.3 μg/m3 (39) | 39.0 | |
| March 19, 2019, 3 p.m. | 18.0 ppb (17) | 4.2 ppb (4) | 17.7 ppb (16) | 14.0 ppb (13) | 13.4 ppb (12) | 0.0 ppb (0) | 15.0 ppb (12) | 0.29 ppb (3) | 32.0 μg/m3 (29) | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 2 p.m. | 20.2 ppb (19) | 4.1 ppb (4) | 19.6 ppb (18) | 16.0 ppb (15) | 15.7 ppb (15) | 0.0 ppb (0) | 13.0 ppb (10) | 0.32 ppb (4) | 32.0 μg/m3 (29) | 13.6 μg/m3 (53) | 53.0 | |
| March 19, 2019, 1 p.m. | 28.0 ppb (26) | 7.1 ppb (7) | 24.6 ppb (23) | 21.0 ppb (19) | 18.9 ppb (18) | 0.0 ppb (0) | 9.0 ppb (7) | 0.41 ppb (5) | 35.0 μg/m3 (32) | 13.2 μg/m3 (53) | 53.0 | |
| March 19, 2019, noon | N/A | N/A | 15.9 ppb (15) | N/A | 14.7 ppb (14) | 0.0 ppb (0) | N/A | 0.32 ppb (4) | 31.0 μg/m3 (28) | 9.6 μg/m3 (40) | 40.0 | |
| March 19, 2019, 11 a.m. | 23.9 ppb (22) | 6.9 ppb (6) | 19.5 ppb (18) | 17.0 ppb (16) | 14.5 ppb (13) | 0.0 ppb (0) | 6.0 ppb (5) | 0.29 ppb (3) | 18.0 μg/m3 (16) | 10.1 μg/m3 (42) | 42.0 | |
| March 19, 2019, 10 a.m. | 14.9 ppb (14) | 0.8 ppb (1) | 13.3 ppb (12) | 14.0 ppb (13) | 12.8 ppb (12) | 0.0 ppb (0) | 8.0 ppb (6) | 0.26 ppb (3) | 14.0 μg/m3 (13) | 9.0 μg/m3 (38) | 38.0 | |
| March 19, 2019, 9 a.m. | 11.5 ppb (11) | 0.4 ppb (0) | 9.5 ppb (9) | 11.0 ppb (10) | 9.5 ppb (9) | 0.0 ppb (0) | 13.0 ppb (10) | 0.24 ppb (3) | 14.0 μg/m3 (13) | 6.1 μg/m3 (25) | 25.0 | |
| March 19, 2019, 8 a.m. | 7.9 ppb (7) | 0.4 ppb (0) | 5.7 ppb (5) | 7.0 ppb (6) | 5.5 ppb (5) | 0.0 ppb (0) | 21.0 ppb (16) | 0.2 ppb (2) | 15.0 μg/m3 (14) | 6.4 μg/m3 (27) | 27.0 | |
| March 19, 2019, 7 a.m. | 11.8 ppb (11) | 0.4 ppb (0) | 9.8 ppb (9) | 11.0 ppb (10) | 9.7 ppb (9) | 0.0 ppb (0) | 21.0 ppb (16) | 0.27 ppb (3) | 19.0 μg/m3 (17) | 7.9 μg/m3 (33) | 33.0 | |
| March 19, 2019, 6 a.m. | 27.9 ppb (26) | 1.7 ppb (2) | 25.9 ppb (24) | 26.0 ppb (24) | 24.8 ppb (23) | 0.0 ppb (0) | 12.0 ppb (9) | 0.52 ppb (6) | 42.0 μg/m3 (38) | 11.8 μg/m3 (49) | 49.0 | |
| March 19, 2019, 5 a.m. | 31.3 ppb (29) | 1.1 ppb (1) | 30.6 ppb (28) | 30.0 ppb (28) | 29.8 ppb (28) | 0.0 ppb (0) | 12.0 ppb (9) | 0.61 ppb (7) | 36.0 μg/m3 (33) | 13.7 μg/m3 (54) | 54.0 | |
| March 19, 2019, 4 a.m. | 38.3 ppb (35) | 4.3 ppb (4) | 37.0 ppb (34) | 34.0 ppb (31) | 32.5 ppb (30) | 0.0 ppb (0) | 11.0 ppb (8) | 0.62 ppb (7) | 33.0 μg/m3 (30) | 13.0 μg/m3 (52) | 52.0 | |
| March 19, 2019, 3 a.m. | 30.2 ppb (28) | 1.5 ppb (1) | 28.7 ppb (27) | 29.0 ppb (27) | 27.7 ppb (26) | 0.0 ppb (0) | 18.0 ppb (14) | 0.55 ppb (6) | 34.0 μg/m3 (31) | 11.2 μg/m3 (47) | 47.0 | |
| March 19, 2019, 2 a.m. | 12.6 ppb (12) | 0.3 ppb (0) | 12.0 ppb (11) | 12.0 ppb (11) | 11.8 ppb (11) | 0.0 ppb (0) | 41.0 ppb (32) | 0.34 ppb (4) | 26.0 μg/m3 (24) | 8.6 μg/m3 (36) | 36.0 | |
| March 19, 2019, 1 a.m. | 6.8 ppb (6) | 0.4 ppb (0) | 6.4 ppb (6) | 6.0 ppb (6) | 6.2 ppb (6) | 0.0 ppb (0) | 52.0 ppb (40) | 0.23 ppb (3) | 25.0 μg/m3 (23) | 3.4 μg/m3 (14) | 40.0 | |
| March 19, 2019, midnight | 5.4 ppb (5) | 0.4 ppb (0) | 5.4 ppb (5) | 5.0 ppb (5) | 5.0 ppb (5) | 0.0 ppb (0) | 56.0 ppb (43) | 0.21 ppb (2) | 26.0 μg/m3 (24) | 4.7 μg/m3 (20) | 43.0 | |
| March 18, 2019, 11 p.m. | 4.2 ppb (4) | 0.4 ppb (0) | 4.3 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 56.0 ppb (43) | 0.18 ppb (2) | 16.0 μg/m3 (15) | 9.2 μg/m3 (38) | 43.0 | |
| March 18, 2019, 10 p.m. | 6.3 ppb (6) | 0.7 ppb (1) | 7.5 ppb (7) | 6.0 ppb (6) | 6.8 ppb (6) | 0.0 ppb (0) | 58.0 ppb (45) | 0.21 ppb (2) | 31.0 μg/m3 (28) | 6.7 μg/m3 (28) | 45.0 | |
| March 18, 2019, 9 p.m. | 6.0 ppb (6) | 0.7 ppb (1) | 6.6 ppb (6) | 5.0 ppb (5) | 5.9 ppb (5) | 0.0 ppb (0) | 55.0 ppb (42) | 0.2 ppb (2) | 25.0 μg/m3 (23) | 5.4 μg/m3 (23) | 42.0 | |
| March 18, 2019, 8 p.m. | 7.2 ppb (7) | 1.0 ppb (1) | 7.7 ppb (7) | 6.0 ppb (6) | 6.7 ppb (6) | 0.0 ppb (0) | 50.0 ppb (38) | 0.2 ppb (2) | 30.0 μg/m3 (27) | 9.5 μg/m3 (40) | 40.0 | |
| March 18, 2019, 7 p.m. | 9.6 ppb (9) | 1.6 ppb (1) | 10.1 ppb (9) | 8.0 ppb (7) | 8.4 ppb (8) | 1.0 ppb (1) | 44.0 ppb (34) | 0.22 ppb (2) | 33.0 μg/m3 (30) | 12.7 μg/m3 (51) | 51.0 | |
| March 18, 2019, 6 p.m. | 8.2 ppb (8) | 2.2 ppb (2) | 7.9 ppb (7) | 6.0 ppb (6) | 6.1 ppb (6) | 0.0 ppb (0) | 40.0 ppb (31) | 0.21 ppb (2) | 29.0 μg/m3 (26) | 11.1 μg/m3 (46) | 46.0 | |
| March 18, 2019, 5 p.m. | 9.5 ppb (9) | 2.4 ppb (2) | 8.6 ppb (8) | 7.0 ppb (6) | 6.4 ppb (6) | 0.0 ppb (0) | 31.0 ppb (24) | 0.25 ppb (3) | 22.0 μg/m3 (20) | 9.6 μg/m3 (40) | 40.0 | |
| March 18, 2019, 4 p.m. | 14.6 ppb (14) | 3.7 ppb (3) | 13.5 ppb (12) | 11.0 ppb (10) | 10.4 ppb (10) | 0.0 ppb (0) | 24.0 ppb (18) | 0.36 ppb (4) | 31.0 μg/m3 (28) | 17.0 μg/m3 (61) | 61.0 | |
| March 18, 2019, 3 p.m. | 22.0 ppb (20) | 7.0 ppb (6) | 19.8 ppb (18) | 15.0 ppb (14) | 12.7 ppb (12) | 0.0 ppb (0) | 17.0 ppb (13) | 0.34 ppb (4) | 26.0 μg/m3 (24) | 8.3 μg/m3 (35) | 35.0 | |
| March 18, 2019, 2 p.m. | 38.5 ppb (36) | 15.7 ppb (15) | 38.1 ppb (35) | 23.0 ppb (21) | 22.4 ppb (21) | 0.0 ppb (0) | 4.0 ppb (3) | 0.62 ppb (7) | 38.0 μg/m3 (35) | 7.7 μg/m3 (32) | 36.0 | |
| March 18, 2019, 1 p.m. | 33.3 ppb (31) | 11.2 ppb (10) | 31.3 ppb (29) | 22.0 ppb (20) | 22.1 ppb (20) | 0.0 ppb (0) | 3.0 ppb (2) | 0.49 ppb (5) | 31.0 μg/m3 (28) | 18.5 μg/m3 (64) | 64.0 | |
| March 18, 2019, noon | N/A | N/A | 20.8 ppb (19) | N/A | 17.4 ppb (16) | 0.0 ppb (0) | N/A | 0.39 ppb (4) | 33.0 μg/m3 (30) | 16.5 μg/m3 (60) | 60.0 | |
| March 18, 2019, 11 a.m. | 13.0 ppb (12) | 1.3 ppb (1) | 11.9 ppb (11) | 12.0 ppb (11) | 11.1 ppb (10) | 0.0 ppb (0) | 7.0 ppb (5) | 0.24 ppb (3) | 24.0 μg/m3 (22) | 11.5 μg/m3 (48) | 48.0 | |
| March 18, 2019, 10 a.m. | 10.9 ppb (10) | 3.0 ppb (3) | 7.2 ppb (7) | 8.0 ppb (7) | 6.1 ppb (6) | 0.0 ppb (0) | 13.0 ppb (10) | 0.21 ppb (2) | 18.0 μg/m3 (16) | 5.2 μg/m3 (22) | 22.0 | |
| March 18, 2019, 9 a.m. | 10.3 ppb (10) | 0.9 ppb (1) | 7.9 ppb (7) | 9.0 ppb (8) | 7.7 ppb (7) | 0.0 ppb (0) | 13.0 ppb (10) | 0.25 ppb (3) | 12.0 μg/m3 (11) | 5.4 μg/m3 (23) | 23.0 | |
| March 18, 2019, 8 a.m. | 21.3 ppb (20) | 5.2 ppb (5) | 17.2 ppb (16) | 16.0 ppb (15) | 14.0 ppb (13) | 0.0 ppb (0) | 9.0 ppb (7) | 0.34 ppb (4) | 20.0 μg/m3 (18) | 10.0 μg/m3 (42) | 42.0 | |
| March 18, 2019, 7 a.m. | 11.8 ppb (11) | 0.4 ppb (0) | 10.4 ppb (10) | 11.0 ppb (10) | 10.4 ppb (10) | 0.0 ppb (0) | 18.0 ppb (14) | 0.34 ppb (4) | 18.0 μg/m3 (16) | 8.4 μg/m3 (35) | 35.0 | |
| March 18, 2019, 6 a.m. | 12.2 ppb (11) | 0.3 ppb (0) | 10.9 ppb (10) | 12.0 ppb (11) | 10.8 ppb (10) | 0.0 ppb (0) | 24.0 ppb (18) | 0.3 ppb (3) | 26.0 μg/m3 (24) | 9.1 μg/m3 (38) | 38.0 | |
| March 18, 2019, 5 a.m. | 22.7 ppb (21) | 0.8 ppb (1) | 20.6 ppb (19) | 22.0 ppb (20) | 20.2 ppb (19) | 0.0 ppb (0) | 16.0 ppb (12) | 0.41 ppb (5) | 24.0 μg/m3 (22) | 8.0 μg/m3 (33) | 33.0 | |
| March 18, 2019, 4 a.m. | 18.2 ppb (17) | 0.5 ppb (0) | 16.0 ppb (15) | 18.0 ppb (17) | 15.8 ppb (15) | 0.0 ppb (0) | 19.0 ppb (15) | 0.43 ppb (5) | 21.0 μg/m3 (19) | 6.7 μg/m3 (28) | 28.0 |