DeKalb Co GA, US: 33.6906, -84.2731
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 19, 2019, 2 p.m. | 3.6 ppb (3) | 0.4 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.09 ppb (1) | N/A | N/A | 32.0 | |
| March 19, 2019, 1 p.m. | 6.0 ppb (6) | 0.4 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.12 ppb (1) | 12.0 μg/m3 (11) | 5.6 μg/m3 (23) | 29.0 | |
| March 19, 2019, noon | 12.7 ppb (12) | 0.5 ppb (0) | 13.0 ppb (12) | 12.0 ppb (11) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.18 ppb (2) | 10.0 μg/m3 (9) | 6.2 μg/m3 (26) | 26.0 | |
| March 19, 2019, 11 a.m. | 27.3 ppb (25) | 2.4 ppb (2) | 25.0 ppb (23) | 25.0 ppb (23) | N/A | 0.0 ppb (0) | 12.0 ppb (9) | 0.23 ppb (3) | 11.0 μg/m3 (10) | 7.1 μg/m3 (30) | 30.0 | |
| March 19, 2019, 10 a.m. | 33.6 ppb (31) | 5.2 ppb (5) | 38.0 ppb (35) | 29.0 ppb (27) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.24 ppb (3) | 12.0 μg/m3 (11) | 7.6 μg/m3 (32) | 35.0 | |
| March 19, 2019, 9 a.m. | 43.8 ppb (41) | 15.1 ppb (14) | 49.0 ppb (45) | 29.0 ppb (27) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.26 ppb (3) | 11.0 μg/m3 (10) | 7.4 μg/m3 (31) | 45.0 | |
| March 19, 2019, 8 a.m. | 17.2 ppb (16) | 0.2 ppb (0) | 21.0 ppb (19) | 17.0 ppb (16) | N/A | 0.0 ppb (0) | 13.0 ppb (10) | 0.2 ppb (2) | 9.0 μg/m3 (8) | 6.2 μg/m3 (26) | 26.0 | |
| March 19, 2019, 7 a.m. | 10.2 ppb (9) | -0.2 ppb (0) | 12.0 ppb (11) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | N/A | 10.0 μg/m3 (9) | 5.9 μg/m3 (25) | 25.0 | |
| March 19, 2019, 6 a.m. | 11.8 ppb (11) | -0.2 ppb (0) | 12.0 ppb (11) | 12.0 ppb (11) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | N/A | 8.0 μg/m3 (7) | 5.2 μg/m3 (22) | 22.0 | |
| March 19, 2019, 5 a.m. | 14.1 ppb (13) | -0.2 ppb (0) | 14.0 ppb (13) | 14.0 ppb (13) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.19 ppb (2) | 8.0 μg/m3 (7) | 5.4 μg/m3 (23) | 23.0 | |
| March 19, 2019, 4 a.m. | 17.4 ppb (16) | -0.2 ppb (0) | 17.0 ppb (16) | 18.0 ppb (17) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.21 ppb (2) | N/A | N/A | 21.0 | |
| March 19, 2019, 3 a.m. | 9.7 ppb (9) | -0.2 ppb (0) | 10.0 ppb (9) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.18 ppb (2) | 7.0 μg/m3 (6) | 4.3 μg/m3 (18) | 28.0 | |
| March 19, 2019, 2 a.m. | 9.9 ppb (9) | -0.3 ppb (0) | 10.0 ppb (9) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 4.4 μg/m3 (18) | 28.0 | |
| March 19, 2019, 1 a.m. | 9.5 ppb (9) | -0.3 ppb (0) | 9.0 ppb (8) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 3.9 μg/m3 (16) | 28.0 | |
| March 19, 2019, midnight | 8.6 ppb (8) | -0.2 ppb (0) | 9.0 ppb (8) | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.18 ppb (2) | 8.0 μg/m3 (7) | 3.8 μg/m3 (16) | 30.0 | |
| March 18, 2019, 11 p.m. | 6.6 ppb (6) | -0.2 ppb (0) | 7.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.18 ppb (2) | 7.0 μg/m3 (6) | 3.5 μg/m3 (15) | 32.0 | |
| March 18, 2019, 10 p.m. | 5.5 ppb (5) | 0.1 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 4.1 μg/m3 (17) | 34.0 | |
| March 18, 2019, 9 p.m. | 5.1 ppb (5) | 0.5 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.35 ppb (4) | 18.0 μg/m3 (16) | 7.2 μg/m3 (30) | 38.0 | |
| March 18, 2019, 8 p.m. | 5.3 ppb (5) | 0.5 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.16 ppb (2) | 12.0 μg/m3 (11) | 6.1 μg/m3 (25) | 38.0 | |
| March 18, 2019, 7 p.m. | 4.5 ppb (4) | 0.5 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.15 ppb (2) | 10.0 μg/m3 (9) | 4.6 μg/m3 (19) | 38.0 | |
| March 18, 2019, 6 p.m. | 5.4 ppb (5) | 0.8 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | 0.16 ppb (2) | 11.0 μg/m3 (10) | 4.2 μg/m3 (18) | 37.0 | |
| March 18, 2019, 5 p.m. | 5.5 ppb (5) | 0.9 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.16 ppb (2) | 9.0 μg/m3 (8) | 3.9 μg/m3 (16) | 36.0 | |
| March 18, 2019, 4 p.m. | 5.1 ppb (5) | 0.8 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.17 ppb (2) | 7.0 μg/m3 (6) | 3.6 μg/m3 (15) | 35.0 | |
| March 18, 2019, 3 p.m. | 7.3 ppb (7) | 1.3 ppb (1) | 7.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.18 ppb (2) | 8.0 μg/m3 (7) | 3.7 μg/m3 (15) | 33.0 | |
| March 18, 2019, 2 p.m. | 10.3 ppb (10) | 1.9 ppb (2) | 10.0 ppb (9) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.21 ppb (2) | 10.0 μg/m3 (9) | 4.8 μg/m3 (20) | 30.0 | |
| March 18, 2019, 1 p.m. | 18.4 ppb (17) | 3.4 ppb (3) | 18.0 ppb (17) | 15.0 ppb (14) | N/A | 1.0 ppb (1) | 29.0 ppb (22) | 0.27 ppb (3) | 11.0 μg/m3 (10) | 6.3 μg/m3 (26) | 26.0 | |
| March 18, 2019, noon | 67.3 ppb (64) | 36.2 ppb (34) | 47.0 ppb (44) | 31.0 ppb (29) | N/A | 1.0 ppb (1) | 5.0 ppb (4) | 0.49 ppb (5) | 12.0 μg/m3 (11) | 7.0 μg/m3 (29) | 64.0 | |
| March 18, 2019, 11 a.m. | 58.5 ppb (55) | 25.4 ppb (24) | 56.0 ppb (52) | 33.0 ppb (31) | N/A | 0.0 ppb (0) | 2.0 ppb (2) | 0.39 ppb (4) | 11.0 μg/m3 (10) | 6.7 μg/m3 (28) | 55.0 | |
| March 18, 2019, 10 a.m. | 31.5 ppb (29) | 3.0 ppb (3) | 26.0 ppb (24) | 29.0 ppb (27) | N/A | 0.0 ppb (0) | 7.0 ppb (5) | 0.33 ppb (4) | 11.0 μg/m3 (10) | 6.8 μg/m3 (28) | 29.0 | |
| March 18, 2019, 9 a.m. | 62.2 ppb (59) | 38.5 ppb (36) | N/A | 24.0 ppb (22) | N/A | 1.0 ppb (1) | 0.0 ppb (0) | 0.59 ppb (7) | 15.0 μg/m3 (14) | 9.2 μg/m3 (38) | 59.0 | |
| March 18, 2019, 8 a.m. | 45.4 ppb (42) | 25.4 ppb (24) | N/A | 20.0 ppb (19) | N/A | 0.0 ppb (0) | N/A | 0.6 ppb (7) | 16.0 μg/m3 (15) | 10.7 μg/m3 (45) | 45.0 | |
| March 18, 2019, 7 a.m. | 47.9 ppb (44) | 26.3 ppb (24) | N/A | 22.0 ppb (20) | N/A | 0.0 ppb (0) | N/A | N/A | 19.0 μg/m3 (17) | 13.5 μg/m3 (53) | 53.0 | |
| March 18, 2019, 6 a.m. | 41.2 ppb (38) | 17.3 ppb (16) | 41.0 ppb (38) | 24.0 ppb (22) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | N/A | 17.0 μg/m3 (15) | 10.8 μg/m3 (45) | 45.0 | |
| March 18, 2019, 5 a.m. | 41.4 ppb (38) | 15.3 ppb (14) | 43.0 ppb (40) | 26.0 ppb (24) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.57 ppb (6) | 14.0 μg/m3 (13) | 9.1 μg/m3 (38) | 40.0 | |
| March 18, 2019, 4 a.m. | 36.3 ppb (34) | 9.4 ppb (9) | 38.0 ppb (35) | 27.0 ppb (25) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.54 ppb (6) | N/A | N/A | 35.0 | |
| March 18, 2019, 3 a.m. | 42.0 ppb (39) | 10.7 ppb (10) | 43.0 ppb (40) | 31.0 ppb (29) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | 0.55 ppb (6) | 12.0 μg/m3 (11) | 6.7 μg/m3 (28) | 40.0 | |
| March 18, 2019, 2 a.m. | 51.6 ppb (48) | 13.6 ppb (13) | 64.0 ppb (61) | 38.0 ppb (35) | N/A | N/A | 1.0 ppb (1) | 0.6 ppb (7) | 16.0 μg/m3 (15) | 8.3 μg/m3 (35) | 61.0 | |
| March 18, 2019, 1 a.m. | 26.1 ppb (24) | 0.0 ppb (0) | 26.0 ppb (24) | 26.0 ppb (24) | N/A | N/A | 16.0 ppb (12) | 0.52 ppb (6) | 15.0 μg/m3 (14) | 10.3 μg/m3 (43) | 43.0 | |
| March 18, 2019, midnight | 13.2 ppb (12) | -0.3 ppb (0) | 14.0 ppb (13) | 14.0 ppb (13) | N/A | N/A | 37.0 ppb (28) | 0.31 ppb (3) | 11.0 μg/m3 (10) | 6.5 μg/m3 (27) | 28.0 | |
| March 17, 2019, 11 p.m. | N/A | N/A | 5.0 ppb (5) | N/A | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.22 ppb (2) | 8.0 μg/m3 (7) | 4.2 μg/m3 (18) | 35.0 | |
| March 17, 2019, 10 p.m. | N/A | N/A | 3.0 ppb (3) | N/A | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.2 ppb (2) | 7.0 μg/m3 (6) | 3.8 μg/m3 (16) | 36.0 | |
| March 17, 2019, 9 p.m. | N/A | N/A | 3.0 ppb (3) | N/A | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.19 ppb (2) | 7.0 μg/m3 (6) | 3.8 μg/m3 (16) | 38.0 | |
| March 17, 2019, 8 p.m. | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 0.0 ppb (0) | 52.0 ppb (40) | 0.21 ppb (2) | 9.0 μg/m3 (8) | 5.1 μg/m3 (21) | 40.0 | |
| March 17, 2019, 7 p.m. | N/A | N/A | 4.0 ppb (4) | N/A | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.22 ppb (2) | 9.0 μg/m3 (8) | 4.8 μg/m3 (20) | 39.0 | |
| March 17, 2019, 6 p.m. | 3.3 ppb (3) | 0.2 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.21 ppb (2) | 9.0 μg/m3 (8) | 4.1 μg/m3 (17) | 38.0 | |
| March 17, 2019, 5 p.m. | 2.9 ppb (3) | 0.2 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.21 ppb (2) | 7.0 μg/m3 (6) | 3.8 μg/m3 (16) | 36.0 | |
| March 17, 2019, 4 p.m. | 2.5 ppb (2) | 0.1 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 45.0 ppb (35) | 0.2 ppb (2) | 6.0 μg/m3 (5) | 3.5 μg/m3 (15) | 35.0 | |
| March 17, 2019, 3 p.m. | 4.3 ppb (4) | 0.6 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.23 ppb (3) | 7.0 μg/m3 (6) | 3.7 μg/m3 (15) | 32.0 | |
| March 17, 2019, 2 p.m. | 8.3 ppb (8) | 1.3 ppb (1) | 8.0 ppb (7) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.27 ppb (3) | 10.0 μg/m3 (9) | 5.0 μg/m3 (21) | 25.0 | |
| March 17, 2019, 1 p.m. | 9.7 ppb (9) | 1.7 ppb (2) | 11.0 ppb (10) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.28 ppb (3) | 8.0 μg/m3 (7) | 4.3 μg/m3 (18) | 18.0 | |
| March 17, 2019, noon | 8.6 ppb (8) | 0.7 ppb (1) | 9.0 ppb (8) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 14.0 ppb (11) | 0.27 ppb (3) | 8.0 μg/m3 (7) | 4.6 μg/m3 (19) | 19.0 | |
| March 17, 2019, 11 a.m. | 6.0 ppb (6) | -0.2 ppb (0) | 7.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 20.0 ppb (15) | 0.25 ppb (3) | 7.0 μg/m3 (6) | 4.5 μg/m3 (19) | 19.0 | |
| March 17, 2019, 10 a.m. | 4.8 ppb (4) | -0.3 ppb (0) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 20.0 ppb (15) | 0.24 ppb (3) | 7.0 μg/m3 (6) | 4.1 μg/m3 (17) | 17.0 | |
| March 17, 2019, 9 a.m. | 5.2 ppb (5) | -0.3 ppb (0) | 7.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.22 ppb (2) | 7.0 μg/m3 (6) | 4.1 μg/m3 (17) | 17.0 | |
| March 17, 2019, 8 a.m. | 5.2 ppb (5) | -0.3 ppb (0) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.22 ppb (2) | 7.0 μg/m3 (6) | 4.3 μg/m3 (18) | 22.0 | |
| March 17, 2019, 7 a.m. | 5.0 ppb (5) | -0.3 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | 8.0 μg/m3 (7) | 4.5 μg/m3 (19) | 22.0 | |
| March 17, 2019, 6 a.m. | 5.2 ppb (5) | -0.3 ppb (0) | 5.0 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | N/A | 8.0 μg/m3 (7) | 4.5 μg/m3 (19) | 24.0 | |
| March 17, 2019, 5 a.m. | 5.6 ppb (5) | -0.3 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.16 ppb (2) | 8.0 μg/m3 (7) | 4.6 μg/m3 (19) | 22.0 | |
| March 17, 2019, 4 a.m. | 6.8 ppb (6) | -0.3 ppb (0) | 7.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.19 ppb (2) | N/A | N/A | 23.0 | |
| March 17, 2019, 3 a.m. | 8.0 ppb (7) | -0.2 ppb (0) | 8.0 ppb (7) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.21 ppb (2) | 8.0 μg/m3 (7) | 5.2 μg/m3 (22) | 22.0 | |
| March 17, 2019, 2 a.m. | 7.9 ppb (7) | -0.2 ppb (0) | 8.0 ppb (7) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.22 ppb (2) | 9.0 μg/m3 (8) | 5.4 μg/m3 (23) | 23.0 | |
| March 17, 2019, 1 a.m. | 8.0 ppb (7) | -0.3 ppb (0) | 8.0 ppb (7) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.22 ppb (2) | 8.0 μg/m3 (7) | 4.5 μg/m3 (19) | 24.0 | |
| March 17, 2019, midnight | 7.1 ppb (7) | -0.3 ppb (0) | 7.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.2 ppb (2) | 8.0 μg/m3 (7) | 4.4 μg/m3 (18) | 27.0 | |
| March 16, 2019, 11 p.m. | 5.6 ppb (5) | -0.2 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 7.0 μg/m3 (6) | 3.8 μg/m3 (16) | 28.0 | |
| March 16, 2019, 10 p.m. | 5.5 ppb (5) | 0.1 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 4.0 μg/m3 (17) | 30.0 | |
| March 16, 2019, 9 p.m. | 4.5 ppb (4) | 0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 4.3 μg/m3 (18) | 31.0 | |
| March 16, 2019, 8 p.m. | 4.5 ppb (4) | 0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.16 ppb (2) | 8.0 μg/m3 (7) | 4.7 μg/m3 (20) | 31.0 | |
| March 16, 2019, 7 p.m. | 4.7 ppb (4) | 0.5 ppb (0) | 5.0 ppb (5) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.16 ppb (2) | 8.0 μg/m3 (7) | 4.7 μg/m3 (20) | 31.0 | |
| March 16, 2019, 6 p.m. | 4.4 ppb (4) | 0.5 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.16 ppb (2) | 8.0 μg/m3 (7) | 4.4 μg/m3 (18) | 31.0 | |
| March 16, 2019, 5 p.m. | 4.3 ppb (4) | 0.5 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.16 ppb (2) | 8.0 μg/m3 (7) | 4.2 μg/m3 (18) | 31.0 | |
| March 16, 2019, 4 p.m. | 4.3 ppb (4) | 0.5 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.16 ppb (2) | 7.0 μg/m3 (6) | 3.7 μg/m3 (15) | 30.0 | |
| March 16, 2019, 3 p.m. | 5.1 ppb (5) | 0.7 ppb (1) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 7.0 μg/m3 (6) | 4.1 μg/m3 (17) | 28.0 | |
| March 16, 2019, 2 p.m. | 5.2 ppb (5) | 0.4 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.17 ppb (2) | 8.0 μg/m3 (7) | 4.3 μg/m3 (18) | 28.0 | |
| March 16, 2019, 1 p.m. | 6.0 ppb (6) | 0.4 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.17 ppb (2) | 7.0 μg/m3 (6) | 3.6 μg/m3 (15) | 27.0 | |
| March 16, 2019, noon | 6.6 ppb (6) | 0.0 ppb (0) | 6.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.19 ppb (2) | 8.0 μg/m3 (7) | 4.1 μg/m3 (17) | 25.0 | |
| March 16, 2019, 11 a.m. | 5.5 ppb (5) | -0.2 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.2 ppb (2) | 7.0 μg/m3 (6) | 3.9 μg/m3 (16) | 25.0 | |
| March 16, 2019, 10 a.m. | 4.0 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.19 ppb (2) | 6.0 μg/m3 (5) | 4.0 μg/m3 (17) | 27.0 | |
| March 16, 2019, 9 a.m. | 2.9 ppb (3) | -0.3 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.19 ppb (2) | 7.0 μg/m3 (6) | 4.1 μg/m3 (17) | 28.0 | |
| March 16, 2019, 8 a.m. | 2.3 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.17 ppb (2) | 7.0 μg/m3 (6) | 4.1 μg/m3 (17) | 28.0 | |
| March 16, 2019, 7 a.m. | 2.4 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | 7.0 μg/m3 (6) | 4.0 μg/m3 (17) | 28.0 | |
| March 16, 2019, 6 a.m. | 2.3 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | 7.0 μg/m3 (6) | 3.9 μg/m3 (16) | 28.0 | |
| March 16, 2019, 5 a.m. | 2.4 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.1 ppb (1) | 9.0 μg/m3 (8) | 4.0 μg/m3 (17) | 28.0 | |
| March 16, 2019, 4 a.m. | 3.9 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.1 ppb (1) | N/A | N/A | 27.0 | |
| March 16, 2019, 3 a.m. | 3.7 ppb (3) | -0.3 ppb (0) | 3.0 ppb (3) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.1 ppb (1) | 9.0 μg/m3 (8) | 4.2 μg/m3 (18) | 28.0 | |
| March 16, 2019, 2 a.m. | 4.0 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | 10.0 μg/m3 (9) | 4.6 μg/m3 (19) | 29.0 | |
| March 16, 2019, 1 a.m. | 4.8 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.11 ppb (1) | 11.0 μg/m3 (10) | 5.1 μg/m3 (21) | 28.0 | |
| March 16, 2019, midnight | 6.1 ppb (6) | -0.3 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.13 ppb (1) | 11.0 μg/m3 (10) | 4.7 μg/m3 (20) | 27.0 | |
| March 15, 2019, 11 p.m. | 4.6 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.12 ppb (1) | 12.0 μg/m3 (11) | 4.3 μg/m3 (18) | 28.0 | |
| March 15, 2019, 10 p.m. | 5.8 ppb (5) | 0.1 ppb (0) | 5.0 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.14 ppb (2) | 14.0 μg/m3 (13) | 4.6 μg/m3 (19) | 26.0 | |
| March 15, 2019, 9 p.m. | 5.6 ppb (5) | 0.4 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 5.1 μg/m3 (21) | 25.0 | |
| March 15, 2019, 8 p.m. | 5.4 ppb (5) | 0.4 ppb (0) | 5.0 ppb (5) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.14 ppb (2) | 15.0 μg/m3 (14) | 5.5 μg/m3 (23) | 24.0 | |
| March 15, 2019, 7 p.m. | 6.2 ppb (6) | 0.8 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.16 ppb (2) | 17.0 μg/m3 (15) | 6.1 μg/m3 (25) | 25.0 | |
| March 15, 2019, 6 p.m. | 6.3 ppb (6) | 0.9 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.15 ppb (2) | 19.0 μg/m3 (17) | 6.1 μg/m3 (25) | 25.0 | |
| March 15, 2019, 5 p.m. | 9.4 ppb (9) | 1.6 ppb (1) | 9.0 ppb (8) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.17 ppb (2) | 17.0 μg/m3 (15) | 6.7 μg/m3 (28) | 28.0 | |
| March 15, 2019, 4 p.m. | 9.7 ppb (9) | 0.6 ppb (1) | 9.0 ppb (8) | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.16 ppb (2) | 19.0 μg/m3 (17) | 6.7 μg/m3 (28) | 28.0 | |
| March 15, 2019, 3 p.m. | 11.8 ppb (11) | 0.6 ppb (1) | 11.0 ppb (10) | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.18 ppb (2) | 30.0 μg/m3 (27) | 9.2 μg/m3 (38) | 38.0 | |
| March 15, 2019, 2 p.m. | 19.0 ppb (18) | 3.8 ppb (4) | 18.0 ppb (17) | 15.0 ppb (14) | N/A | 0.0 ppb (0) | 12.0 ppb (9) | 0.21 ppb (2) | 39.0 μg/m3 (35) | 13.3 μg/m3 (53) | 53.0 | |
| March 15, 2019, 1 p.m. | 14.2 ppb (13) | 1.7 ppb (2) | 14.0 ppb (13) | 13.0 ppb (12) | N/A | 0.0 ppb (0) | 11.0 ppb (8) | 0.2 ppb (2) | 34.0 μg/m3 (31) | 12.7 μg/m3 (51) | 51.0 | |
| March 15, 2019, noon | 8.0 ppb (7) | -0.1 ppb (0) | 7.0 ppb (6) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 17.0 ppb (13) | 0.18 ppb (2) | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| March 15, 2019, 11 a.m. | 4.1 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.16 ppb (2) | 19.0 μg/m3 (17) | 10.7 μg/m3 (45) | 45.0 | |
| March 15, 2019, 10 a.m. | 3.1 ppb (3) | -0.2 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 21.0 ppb (16) | 0.14 ppb (2) | 19.0 μg/m3 (17) | 11.3 μg/m3 (47) | 47.0 | |
| March 15, 2019, 9 a.m. | 1.7 ppb (2) | -0.2 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.14 ppb (2) | 21.0 μg/m3 (19) | 12.6 μg/m3 (51) | 51.0 | |
| March 15, 2019, 8 a.m. | 2.2 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.17 ppb (2) | 23.0 μg/m3 (21) | 14.0 μg/m3 (54) | 54.0 | |
| March 15, 2019, 7 a.m. | 2.0 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | N/A | 24.0 μg/m3 (22) | 14.8 μg/m3 (56) | 56.0 | |
| March 15, 2019, 6 a.m. | 1.8 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | N/A | 25.0 μg/m3 (23) | 16.6 μg/m3 (60) | 60.0 | |
| March 15, 2019, 5 a.m. | 1.6 ppb (1) | -0.3 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.06 ppb (1) | 27.0 μg/m3 (25) | 18.1 μg/m3 (63) | 63.0 | |
| March 15, 2019, 4 a.m. | 2.1 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.06 ppb (1) | 27.0 μg/m3 (25) | 17.3 μg/m3 (61) | 61.0 | |
| March 15, 2019, 3 a.m. | 2.4 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | 33.0 μg/m3 (30) | 23.5 μg/m3 (74) | 74.0 | |
| March 15, 2019, 2 a.m. | 2.6 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.1 ppb (1) | 33.0 μg/m3 (30) | 22.8 μg/m3 (73) | 73.0 | |
| March 15, 2019, 1 a.m. | 3.8 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.09 ppb (1) | 28.0 μg/m3 (25) | 18.1 μg/m3 (63) | 63.0 | |
| March 15, 2019, midnight | 2.4 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.08 ppb (1) | 25.0 μg/m3 (23) | 13.8 μg/m3 (54) | 54.0 | |
| March 14, 2019, 11 p.m. | 2.7 ppb (3) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.07 ppb (1) | 21.0 μg/m3 (19) | 12.3 μg/m3 (51) | 51.0 | |
| March 14, 2019, 10 p.m. | 2.4 ppb (2) | -0.2 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.07 ppb (1) | 23.0 μg/m3 (21) | 12.6 μg/m3 (51) | 51.0 | |
| March 14, 2019, 9 p.m. | 2.2 ppb (2) | -0.2 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.07 ppb (1) | 22.0 μg/m3 (20) | 12.3 μg/m3 (51) | 51.0 | |
| March 14, 2019, 8 p.m. | 2.4 ppb (2) | -0.1 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 42.0 ppb (32) | 0.05 ppb (1) | 21.0 μg/m3 (19) | 10.5 μg/m3 (44) | 44.0 | |
| March 14, 2019, 7 p.m. | 2.1 ppb (2) | -0.2 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.01 ppb (0) | 19.0 μg/m3 (17) | 9.3 μg/m3 (39) | 39.0 | |
| March 14, 2019, 6 p.m. | 2.1 ppb (2) | -0.1 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.04 ppb (0) | 23.0 μg/m3 (21) | 8.9 μg/m3 (37) | 37.0 | |
| March 14, 2019, 5 p.m. | 2.1 ppb (2) | -0.1 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.07 ppb (1) | 20.0 μg/m3 (18) | 8.2 μg/m3 (34) | 34.0 | |
| March 14, 2019, 4 p.m. | 1.9 ppb (2) | -0.1 ppb (0) | 2.0 ppb (2) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.07 ppb (1) | 17.0 μg/m3 (15) | 7.4 μg/m3 (31) | 31.0 | |
| March 14, 2019, 3 p.m. | 3.1 ppb (3) | 0.1 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | 18.0 μg/m3 (16) | 7.3 μg/m3 (30) | 30.0 | |
| March 14, 2019, 2 p.m. | 3.4 ppb (3) | 0.1 ppb (0) | 3.0 ppb (3) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.15 ppb (2) | 19.0 μg/m3 (17) | 7.5 μg/m3 (31) | 31.0 | |
| March 14, 2019, 1 p.m. | 4.3 ppb (4) | -0.1 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.17 ppb (2) | 18.0 μg/m3 (16) | 7.7 μg/m3 (32) | 32.0 | |
| March 14, 2019, noon | 4.0 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.17 ppb (2) | 16.0 μg/m3 (15) | 7.1 μg/m3 (30) | 30.0 | |
| March 14, 2019, 11 a.m. | 2.3 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.17 ppb (2) | 15.0 μg/m3 (14) | 6.9 μg/m3 (29) | 29.0 | |
| March 14, 2019, 10 a.m. | 5.3 ppb (5) | -0.2 ppb (0) | 4.0 ppb (4) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.17 ppb (2) | 15.0 μg/m3 (14) | 6.9 μg/m3 (29) | 29.0 | |
| March 14, 2019, 9 a.m. | 4.8 ppb (4) | -0.2 ppb (0) | 4.0 ppb (4) | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.18 ppb (2) | 15.0 μg/m3 (14) | 6.9 μg/m3 (29) | 29.0 | |
| March 14, 2019, 8 a.m. | 1.2 ppb (1) | -0.3 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.18 ppb (2) | 15.0 μg/m3 (14) | 7.5 μg/m3 (31) | 31.0 | |
| March 14, 2019, 7 a.m. | 1.0 ppb (1) | -0.3 ppb (0) | 1.0 ppb (1) | 1.0 ppb (1) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | 17.0 μg/m3 (15) | 8.9 μg/m3 (37) | 37.0 | |
| March 14, 2019, 6 a.m. | 1.5 ppb (1) | -0.3 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | N/A | 18.0 μg/m3 (16) | 10.5 μg/m3 (44) | 44.0 | |
| March 14, 2019, 5 a.m. | 2.5 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.19 ppb (2) | 20.0 μg/m3 (18) | 13.2 μg/m3 (53) | 53.0 | |
| March 14, 2019, 4 a.m. | 4.2 ppb (4) | -0.3 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.22 ppb (2) | N/A | N/A | 29.0 | |
| March 14, 2019, 3 a.m. | 6.2 ppb (6) | -0.3 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.24 ppb (3) | 24.0 μg/m3 (22) | 16.3 μg/m3 (59) | 59.0 | |
| March 14, 2019, 2 a.m. | 6.1 ppb (6) | -0.3 ppb (0) | 5.0 ppb (5) | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.23 ppb (3) | 20.0 μg/m3 (18) | 11.0 μg/m3 (46) | 46.0 | |
| March 14, 2019, 1 a.m. | 6.6 ppb (6) | -0.3 ppb (0) | 6.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.23 ppb (3) | 13.0 μg/m3 (12) | 7.9 μg/m3 (33) | 33.0 | |
| March 14, 2019, midnight | 3.6 ppb (3) | -0.3 ppb (0) | 3.0 ppb (3) | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 47.0 ppb (36) | 0.2 ppb (2) | 13.0 μg/m3 (12) | 6.8 μg/m3 (28) | 36.0 | |
| March 13, 2019, 11 p.m. | 2.6 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.2 ppb (2) | 24.0 μg/m3 (22) | 16.9 μg/m3 (60) | 60.0 | |
| March 13, 2019, 10 p.m. | 3.6 ppb (3) | -0.2 ppb (0) | 3.0 ppb (3) | 4.0 ppb (4) | N/A | 1.0 ppb (1) | 59.0 ppb (45) | 0.28 ppb (3) | 58.0 μg/m3 (52) | 50.0 μg/m3 (136) | 136.0 | |
| March 13, 2019, 9 p.m. | 2.4 ppb (2) | -0.2 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 1.0 ppb (1) | 54.0 ppb (42) | 0.19 ppb (2) | 17.0 μg/m3 (15) | 10.5 μg/m3 (44) | 44.0 | |
| March 13, 2019, 8 p.m. | 2.5 ppb (2) | -0.2 ppb (0) | 1.0 ppb (1) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.17 ppb (2) | 13.0 μg/m3 (12) | 7.3 μg/m3 (30) | 39.0 | |
| March 13, 2019, 7 p.m. | 2.5 ppb (2) | -0.2 ppb (0) | 1.0 ppb (1) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 51.0 ppb (39) | 0.17 ppb (2) | 14.0 μg/m3 (13) | 7.0 μg/m3 (29) | 39.0 | |
| March 13, 2019, 6 p.m. | 2.3 ppb (2) | -0.2 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | 0.17 ppb (2) | 11.0 μg/m3 (10) | 6.3 μg/m3 (26) | 38.0 | |
| March 13, 2019, 5 p.m. | 2.2 ppb (2) | -0.1 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 49.0 ppb (38) | 0.17 ppb (2) | 12.0 μg/m3 (11) | 6.0 μg/m3 (25) | 38.0 | |
| March 13, 2019, 4 p.m. | 2.3 ppb (2) | -0.1 ppb (0) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 1.0 ppb (1) | 46.0 ppb (35) | 0.17 ppb (2) | 14.0 μg/m3 (13) | 7.2 μg/m3 (30) | 35.0 | |
| March 13, 2019, 3 p.m. | 2.4 ppb (2) | 0.0 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 1.0 ppb (1) | 42.0 ppb (32) | N/A | 19.0 μg/m3 (17) | 9.4 μg/m3 (39) | 39.0 | |
| March 13, 2019, 2 p.m. | 3.9 ppb (4) | 0.0 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | N/A | 1.0 ppb (1) | 35.0 ppb (27) | N/A | 12.0 μg/m3 (11) | 6.0 μg/m3 (25) | 27.0 | |
| March 13, 2019, 1 p.m. | 6.8 ppb (6) | 0.1 ppb (0) | 7.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | N/A | 14.0 μg/m3 (13) | 7.8 μg/m3 (32) | 32.0 | |
| March 13, 2019, noon | 15.6 ppb (14) | 0.8 ppb (1) | 14.0 ppb (13) | 15.0 ppb (14) | N/A | 0.0 ppb (0) | 18.0 ppb (14) | N/A | 15.0 μg/m3 (14) | 9.3 μg/m3 (39) | 39.0 | |
| March 13, 2019, 11 a.m. | 37.2 ppb (34) | 8.3 ppb (8) | 28.0 ppb (26) | 29.0 ppb (27) | N/A | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 16.0 μg/m3 (15) | 9.9 μg/m3 (41) | 41.0 | |
| March 13, 2019, 10 a.m. | 42.6 ppb (39) | 17.8 ppb (16) | 45.0 ppb (42) | 25.0 ppb (23) | N/A | 0.0 ppb (0) | 10.0 ppb (8) | N/A | 17.0 μg/m3 (15) | 9.9 μg/m3 (41) | 42.0 | |
| March 13, 2019, 9 a.m. | 6.8 ppb (6) | -0.3 ppb (0) | 7.0 ppb (6) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | 15.0 μg/m3 (14) | 9.7 μg/m3 (40) | 40.0 | |
| March 13, 2019, 8 a.m. | 2.3 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | 15.0 μg/m3 (14) | 9.4 μg/m3 (39) | 39.0 | |
| March 13, 2019, 7 a.m. | 2.3 ppb (2) | -0.3 ppb (0) | 2.0 ppb (2) | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | N/A | 12.0 μg/m3 (11) | 7.6 μg/m3 (32) | 32.0 | |
| March 13, 2019, 6 a.m. | 9.2 ppb (9) | -0.3 ppb (0) | 8.0 ppb (7) | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | N/A | 14.0 μg/m3 (13) | 7.2 μg/m3 (30) | 30.0 | |
| March 13, 2019, 5 a.m. | 39.3 ppb (36) | 10.5 ppb (10) | 41.0 ppb (38) | 29.0 ppb (27) | N/A | 0.0 ppb (0) | 5.0 ppb (4) | N/A | 13.0 μg/m3 (12) | 7.1 μg/m3 (30) | 38.0 | |
| March 13, 2019, 4 a.m. | 52.7 ppb (49) | 15.5 ppb (14) | 52.0 ppb (48) | 37.0 ppb (34) | N/A | 0.0 ppb (0) | 0.0 ppb (0) | N/A | 12.0 μg/m3 (11) | 6.8 μg/m3 (28) | 49.0 | |
| March 13, 2019, 3 a.m. | 45.9 ppb (42) | 8.4 ppb (8) | 60.0 ppb (56) | 38.0 ppb (35) | N/A | 0.0 ppb (0) | 3.0 ppb (2) | N/A | 13.0 μg/m3 (12) | 6.3 μg/m3 (26) | 56.0 | |
| March 13, 2019, 2 a.m. | 27.5 ppb (25) | -0.2 ppb (0) | 29.0 ppb (27) | 28.0 ppb (26) | N/A | 0.0 ppb (0) | 14.0 ppb (11) | N/A | 12.0 μg/m3 (11) | 5.8 μg/m3 (24) | 27.0 | |
| March 13, 2019, 1 a.m. | 22.2 ppb (21) | -0.2 ppb (0) | 23.0 ppb (21) | 23.0 ppb (21) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | N/A | 11.0 μg/m3 (10) | 5.4 μg/m3 (23) | 23.0 | |
| March 13, 2019, midnight | 31.7 ppb (29) | -0.2 ppb (0) | 29.0 ppb (27) | 32.0 ppb (30) | N/A | 0.0 ppb (0) | 21.0 ppb (16) | N/A | 12.0 μg/m3 (11) | 5.7 μg/m3 (24) | 30.0 | |
| March 12, 2019, 11 p.m. | 14.9 ppb (14) | -0.2 ppb (0) | 15.0 ppb (14) | 15.0 ppb (14) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | 12.0 μg/m3 (11) | 5.2 μg/m3 (22) | 34.0 | |
| March 12, 2019, 10 p.m. | 10.7 ppb (10) | 0.2 ppb (0) | 9.0 ppb (8) | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 50.0 ppb (38) | N/A | 11.0 μg/m3 (10) | 5.3 μg/m3 (22) | 38.0 | |
| March 12, 2019, 9 p.m. | 11.1 ppb (10) | 0.6 ppb (1) | 9.0 ppb (8) | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 52.0 ppb (40) | N/A | 12.0 μg/m3 (11) | 5.0 μg/m3 (21) | 40.0 | |
| March 12, 2019, 8 p.m. | 9.9 ppb (9) | 0.7 ppb (1) | 8.0 ppb (7) | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 54.0 ppb (42) | N/A | 13.0 μg/m3 (12) | 5.1 μg/m3 (21) | 42.0 | |
| March 12, 2019, 7 p.m. | 9.0 ppb (8) | 0.7 ppb (1) | 7.0 ppb (6) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 53.0 ppb (41) | N/A | 11.0 μg/m3 (10) | 4.7 μg/m3 (20) | 41.0 | |
| March 12, 2019, 6 p.m. | 9.0 ppb (8) | 1.2 ppb (1) | 7.0 ppb (6) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 48.0 ppb (37) | N/A | 10.0 μg/m3 (9) | 4.7 μg/m3 (20) | 37.0 | |
| March 12, 2019, 5 p.m. | 9.0 ppb (8) | 1.4 ppb (1) | 8.0 ppb (7) | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | N/A | 9.0 μg/m3 (8) | 4.4 μg/m3 (18) | 34.0 | |
| March 12, 2019, 4 p.m. | 9.0 ppb (8) | 1.7 ppb (2) | 8.0 ppb (7) | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | N/A | 9.0 μg/m3 (8) | 4.4 μg/m3 (18) | 32.0 | |
| March 12, 2019, 3 p.m. | 13.1 ppb (12) | 2.9 ppb (3) | 12.0 ppb (11) | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | N/A | 10.0 μg/m3 (9) | 4.5 μg/m3 (19) | 26.0 |