Riverside Co CA, US: 34.0103, -117.4258
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 23, 2019, 1 p.m. | 30.0 ppb (28) | 12.4 ppb (11) | 30.1 ppb (28) | 18.0 ppb (17) | 17.7 ppb (16) | 0.0 ppb (0) | 0.0 ppb (0) | 0.46 ppb (5) | 21.0 μg/m3 (19) | 13.0 μg/m3 (52) | 52.0 | |
| March 23, 2019, noon | 26.3 ppb (24) | 9.0 ppb (8) | 23.9 ppb (22) | 17.0 ppb (16) | 18.5 ppb (17) | 0.0 ppb (0) | 0.0 ppb (0) | 0.4 ppb (4) | 25.0 μg/m3 (23) | 13.0 μg/m3 (52) | 52.0 | |
| March 23, 2019, 11 a.m. | 27.4 ppb (25) | 5.4 ppb (5) | 24.3 ppb (23) | 22.0 ppb (20) | 19.7 ppb (18) | 0.0 ppb (0) | 1.0 ppb (1) | 0.34 ppb (4) | 23.0 μg/m3 (21) | 10.0 μg/m3 (42) | 42.0 | |
| March 23, 2019, 10 a.m. | 25.7 ppb (24) | 3.6 ppb (3) | 21.7 ppb (20) | 22.0 ppb (20) | 20.1 ppb (19) | 0.0 ppb (0) | 2.0 ppb (2) | 0.34 ppb (4) | 20.0 μg/m3 (18) | 9.0 μg/m3 (38) | 38.0 | |
| March 23, 2019, 9 a.m. | 17.0 ppb (16) | 1.3 ppb (1) | 17.0 ppb (16) | 16.0 ppb (15) | 15.9 ppb (15) | 0.0 ppb (0) | 10.0 ppb (8) | 0.34 ppb (4) | 25.0 μg/m3 (23) | 15.0 μg/m3 (56) | 56.0 | |
| March 23, 2019, 8 a.m. | 20.0 ppb (19) | 0.9 ppb (1) | 20.6 ppb (19) | 19.0 ppb (18) | 20.4 ppb (19) | 0.0 ppb (0) | 12.0 ppb (9) | 0.33 ppb (4) | 26.0 μg/m3 (24) | 9.0 μg/m3 (38) | 38.0 | |
| March 23, 2019, 7 a.m. | 18.7 ppb (17) | 1.1 ppb (1) | 19.4 ppb (18) | 18.0 ppb (17) | 19.0 ppb (18) | 0.0 ppb (0) | 11.0 ppb (8) | 0.41 ppb (5) | 22.0 μg/m3 (20) | 8.0 μg/m3 (33) | 33.0 | |
| March 23, 2019, 6 a.m. | 13.1 ppb (12) | 0.7 ppb (1) | 12.1 ppb (11) | 12.0 ppb (11) | 12.1 ppb (11) | 0.0 ppb (0) | 21.0 ppb (16) | 0.29 ppb (3) | 20.0 μg/m3 (18) | 7.0 μg/m3 (29) | 29.0 | |
| March 23, 2019, 5 a.m. | 9.4 ppb (9) | 0.5 ppb (0) | 8.8 ppb (8) | 9.0 ppb (8) | 8.8 ppb (8) | 0.0 ppb (0) | 31.0 ppb (24) | 0.2 ppb (2) | 18.0 μg/m3 (16) | 4.0 μg/m3 (17) | 24.0 | |
| March 23, 2019, 4 a.m. | 8.4 ppb (8) | 0.4 ppb (0) | 7.6 ppb (7) | 8.0 ppb (7) | 7.6 ppb (7) | 0.0 ppb (0) | 35.0 ppb (27) | 0.2 ppb (2) | 16.0 μg/m3 (15) | 0.0 μg/m3 (0) | 27.0 | |
| March 23, 2019, 3 a.m. | 7.0 ppb (6) | 0.4 ppb (0) | 6.6 ppb (6) | 7.0 ppb (6) | 6.5 ppb (6) | 0.0 ppb (0) | 41.0 ppb (32) | 0.17 ppb (2) | 13.0 μg/m3 (12) | 3.0 μg/m3 (12) | 32.0 | |
| March 23, 2019, 2 a.m. | 8.9 ppb (8) | 0.4 ppb (0) | 8.7 ppb (8) | 8.0 ppb (7) | 8.6 ppb (8) | 0.0 ppb (0) | 42.0 ppb (32) | 0.2 ppb (2) | 24.0 μg/m3 (22) | 7.0 μg/m3 (29) | 32.0 | |
| March 23, 2019, 1 a.m. | 9.6 ppb (9) | 0.6 ppb (1) | 10.1 ppb (9) | 9.0 ppb (8) | 9.8 ppb (9) | 0.0 ppb (0) | 47.0 ppb (36) | 0.22 ppb (2) | 27.0 μg/m3 (25) | 7.0 μg/m3 (29) | 36.0 | |
| March 23, 2019, midnight | 8.9 ppb (8) | 0.9 ppb (1) | 10.0 ppb (9) | 8.0 ppb (7) | 9.3 ppb (9) | 0.0 ppb (0) | 52.0 ppb (40) | 0.21 ppb (2) | 20.0 μg/m3 (18) | 8.0 μg/m3 (33) | 40.0 | |
| March 22, 2019, 11 p.m. | 6.6 ppb (6) | 1.0 ppb (1) | 7.4 ppb (7) | 6.0 ppb (6) | 6.6 ppb (6) | 0.0 ppb (0) | 54.0 ppb (42) | 0.18 ppb (2) | 23.0 μg/m3 (21) | 7.0 μg/m3 (29) | 42.0 | |
| March 22, 2019, 10 p.m. | 4.5 ppb (4) | 0.7 ppb (1) | 4.7 ppb (4) | 4.0 ppb (4) | 4.3 ppb (4) | 0.0 ppb (0) | 55.0 ppb (42) | 0.15 ppb (2) | 18.0 μg/m3 (16) | 6.0 μg/m3 (25) | 42.0 | |
| March 22, 2019, 9 p.m. | 4.3 ppb (4) | 0.8 ppb (1) | 4.3 ppb (4) | 4.0 ppb (4) | 3.8 ppb (4) | 0.0 ppb (0) | 52.0 ppb (40) | 0.15 ppb (2) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 40.0 | |
| March 22, 2019, 8 p.m. | 4.4 ppb (4) | 0.8 ppb (1) | 4.1 ppb (4) | 4.0 ppb (4) | 3.5 ppb (3) | 0.0 ppb (0) | 51.0 ppb (39) | 0.14 ppb (2) | N/A | N/A | 39.0 | |
| March 22, 2019, 7 p.m. | 4.5 ppb (4) | 1.0 ppb (1) | 4.1 ppb (4) | 4.0 ppb (4) | 3.3 ppb (3) | 0.0 ppb (0) | 49.0 ppb (38) | 0.14 ppb (2) | N/A | N/A | 38.0 | |
| March 22, 2019, 6 p.m. | 4.0 ppb (4) | 0.9 ppb (1) | 3.4 ppb (3) | 3.0 ppb (3) | 2.8 ppb (3) | 0.0 ppb (0) | 48.0 ppb (37) | 0.14 ppb (2) | N/A | N/A | 37.0 | |
| March 22, 2019, 5 p.m. | 4.7 ppb (4) | 1.0 ppb (1) | 4.0 ppb (4) | 4.0 ppb (4) | 3.3 ppb (3) | 0.0 ppb (0) | 45.0 ppb (35) | 0.14 ppb (2) | 14.0 μg/m3 (13) | 9.0 μg/m3 (38) | 38.0 | |
| March 22, 2019, 4 p.m. | 7.7 ppb (7) | 1.8 ppb (2) | 7.2 ppb (7) | 6.0 ppb (6) | 5.6 ppb (5) | 0.0 ppb (0) | 38.0 ppb (29) | 0.16 ppb (2) | 17.0 μg/m3 (15) | 12.0 μg/m3 (50) | 50.0 | |
| March 22, 2019, 3 p.m. | 28.0 ppb (26) | 12.0 ppb (11) | 23.9 ppb (22) | 16.0 ppb (15) | 13.7 ppb (13) | 1.0 ppb (1) | 19.0 ppb (15) | 0.34 ppb (4) | 32.0 μg/m3 (29) | 11.0 μg/m3 (46) | 46.0 | |
| March 22, 2019, 2 p.m. | 48.3 ppb (45) | 22.9 ppb (21) | 50.0 ppb (46) | 25.0 ppb (23) | 26.4 ppb (24) | 1.0 ppb (1) | 3.0 ppb (2) | 0.69 ppb (8) | 30.0 μg/m3 (27) | 6.0 μg/m3 (25) | 46.0 | |
| March 22, 2019, 1 p.m. | 32.8 ppb (30) | 8.0 ppb (7) | 29.6 ppb (27) | 25.0 ppb (23) | 22.2 ppb (21) | 0.0 ppb (0) | 4.0 ppb (3) | 0.38 ppb (4) | 19.0 μg/m3 (17) | 7.0 μg/m3 (29) | 30.0 | |
| March 22, 2019, noon | 25.2 ppb (23) | 4.7 ppb (4) | 21.7 ppb (20) | 20.0 ppb (19) | 18.2 ppb (17) | 0.0 ppb (0) | 9.0 ppb (7) | 0.25 ppb (3) | 17.0 μg/m3 (15) | 8.0 μg/m3 (33) | 33.0 | |
| March 22, 2019, 11 a.m. | 17.1 ppb (16) | 0.8 ppb (1) | 15.4 ppb (14) | 16.0 ppb (15) | 15.2 ppb (14) | 0.0 ppb (0) | 11.0 ppb (8) | 0.21 ppb (2) | 18.0 μg/m3 (16) | 5.0 μg/m3 (21) | 21.0 | |
| March 22, 2019, 10 a.m. | 18.2 ppb (17) | 1.4 ppb (1) | 17.1 ppb (16) | 17.0 ppb (16) | 16.5 ppb (15) | 0.0 ppb (0) | 11.0 ppb (8) | 0.21 ppb (2) | 13.0 μg/m3 (12) | 5.0 μg/m3 (21) | 21.0 | |
| March 22, 2019, 9 a.m. | 14.8 ppb (14) | 0.8 ppb (1) | 14.0 ppb (13) | 14.0 ppb (13) | 13.6 ppb (13) | 0.0 ppb (0) | 14.0 ppb (11) | 0.22 ppb (2) | 19.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 8 a.m. | 9.8 ppb (9) | 0.6 ppb (1) | 8.6 ppb (8) | 9.0 ppb (8) | 8.5 ppb (8) | 0.0 ppb (0) | 22.0 ppb (17) | 0.19 ppb (2) | 15.0 μg/m3 (14) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 7 a.m. | 9.9 ppb (9) | 0.6 ppb (1) | 9.2 ppb (9) | 9.0 ppb (8) | 9.2 ppb (9) | 0.0 ppb (0) | 23.0 ppb (18) | 0.25 ppb (3) | 16.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| March 22, 2019, 6 a.m. | 6.8 ppb (6) | 0.4 ppb (0) | 5.6 ppb (5) | 6.0 ppb (6) | 5.6 ppb (5) | 0.0 ppb (0) | 30.0 ppb (23) | 0.24 ppb (3) | 13.0 μg/m3 (12) | 3.0 μg/m3 (12) | 23.0 | |
| March 22, 2019, 5 a.m. | 6.1 ppb (6) | 0.4 ppb (0) | 4.8 ppb (4) | 6.0 ppb (6) | 4.7 ppb (4) | 0.0 ppb (0) | 34.0 ppb (26) | 0.17 ppb (2) | 11.0 μg/m3 (10) | 2.0 μg/m3 (8) | 26.0 | |
| March 22, 2019, 4 a.m. | 5.7 ppb (5) | 0.4 ppb (0) | 4.4 ppb (4) | 5.0 ppb (5) | 4.3 ppb (4) | 0.0 ppb (0) | 36.0 ppb (28) | 0.16 ppb (2) | 10.0 μg/m3 (9) | 4.0 μg/m3 (17) | 28.0 | |
| March 22, 2019, 3 a.m. | 6.1 ppb (6) | 0.4 ppb (0) | 4.8 ppb (4) | 6.0 ppb (6) | 4.7 ppb (4) | 0.0 ppb (0) | 37.0 ppb (28) | 0.18 ppb (2) | 10.0 μg/m3 (9) | 5.0 μg/m3 (21) | 28.0 | |
| March 22, 2019, 2 a.m. | 5.8 ppb (5) | 0.4 ppb (0) | 4.5 ppb (4) | 5.0 ppb (5) | 4.4 ppb (4) | 0.0 ppb (0) | 41.0 ppb (32) | 0.17 ppb (2) | 10.0 μg/m3 (9) | 3.0 μg/m3 (12) | 32.0 | |
| March 22, 2019, 1 a.m. | 4.9 ppb (5) | 0.4 ppb (0) | 3.5 ppb (3) | 4.0 ppb (4) | 3.4 ppb (3) | 0.0 ppb (0) | 44.0 ppb (34) | 0.16 ppb (2) | 8.0 μg/m3 (7) | 3.0 μg/m3 (12) | 34.0 | |
| March 22, 2019, midnight | 3.8 ppb (4) | 0.5 ppb (0) | 2.6 ppb (2) | 3.0 ppb (3) | 2.4 ppb (2) | 0.0 ppb (0) | 48.0 ppb (37) | 0.14 ppb (2) | 7.0 μg/m3 (6) | 2.0 μg/m3 (8) | 37.0 | |
| March 21, 2019, 11 p.m. | 4.5 ppb (4) | 0.8 ppb (1) | 3.3 ppb (3) | 4.0 ppb (4) | 2.7 ppb (3) | 0.0 ppb (0) | 50.0 ppb (38) | 0.15 ppb (2) | 8.0 μg/m3 (7) | 0.0 μg/m3 (0) | 38.0 | |
| March 21, 2019, 10 p.m. | 5.0 ppb (5) | 1.0 ppb (1) | 3.5 ppb (3) | 4.0 ppb (4) | 2.7 ppb (3) | 0.0 ppb (0) | 48.0 ppb (37) | N/A | 6.0 μg/m3 (5) | 1.0 μg/m3 (4) | 37.0 | |
| March 21, 2019, 9 p.m. | 4.2 ppb (4) | 0.9 ppb (1) | 2.8 ppb (3) | 3.0 ppb (3) | 2.1 ppb (2) | 0.0 ppb (0) | 47.0 ppb (36) | 0.15 ppb (2) | 4.0 μg/m3 (4) | 1.0 μg/m3 (4) | 36.0 | |
| March 21, 2019, 8 p.m. | 3.9 ppb (4) | 0.8 ppb (1) | 2.5 ppb (2) | 3.0 ppb (3) | 2.0 ppb (2) | 0.0 ppb (0) | 46.0 ppb (35) | 0.16 ppb (2) | 16.0 μg/m3 (15) | 1.0 μg/m3 (4) | 35.0 | |
| March 21, 2019, 7 p.m. | 6.1 ppb (6) | 1.4 ppb (1) | 4.7 ppb (4) | 5.0 ppb (5) | 3.6 ppb (3) | 0.0 ppb (0) | 43.0 ppb (33) | 0.16 ppb (2) | 14.0 μg/m3 (13) | 3.0 μg/m3 (12) | 33.0 | |
| March 21, 2019, 6 p.m. | 4.9 ppb (5) | 0.9 ppb (1) | 3.6 ppb (3) | 4.0 ppb (4) | 2.9 ppb (3) | 0.0 ppb (0) | 43.0 ppb (33) | 0.16 ppb (2) | 13.0 μg/m3 (12) | 4.0 μg/m3 (17) | 33.0 | |
| March 21, 2019, 5 p.m. | 6.0 ppb (6) | 1.2 ppb (1) | 4.6 ppb (4) | 5.0 ppb (5) | 3.7 ppb (3) | 0.0 ppb (0) | 42.0 ppb (32) | 0.17 ppb (2) | 19.0 μg/m3 (17) | 5.0 μg/m3 (21) | 32.0 | |
| March 21, 2019, 4 p.m. | 12.0 ppb (11) | 2.4 ppb (2) | 10.6 ppb (10) | 10.0 ppb (9) | 8.4 ppb (8) | 0.0 ppb (0) | 31.0 ppb (24) | 0.23 ppb (3) | 15.0 μg/m3 (14) | 5.0 μg/m3 (21) | 24.0 | |
| March 21, 2019, 3 p.m. | 23.7 ppb (22) | 7.1 ppb (7) | 22.1 ppb (20) | 17.0 ppb (16) | 15.6 ppb (14) | 0.0 ppb (0) | 16.0 ppb (12) | 0.31 ppb (3) | 16.0 μg/m3 (15) | 4.0 μg/m3 (17) | 22.0 | |
| March 21, 2019, 2 p.m. | 46.7 ppb (43) | 22.1 ppb (20) | 45.5 ppb (42) | 25.0 ppb (23) | 24.0 ppb (22) | 0.0 ppb (0) | 3.0 ppb (2) | 0.43 ppb (5) | 21.0 μg/m3 (19) | 2.0 μg/m3 (8) | 43.0 | |
| March 21, 2019, 1 p.m. | 39.2 ppb (36) | 13.4 ppb (12) | 40.7 ppb (38) | 26.0 ppb (24) | 24.4 ppb (23) | 0.0 ppb (0) | 2.0 ppb (2) | 0.35 ppb (4) | 19.0 μg/m3 (17) | 4.0 μg/m3 (17) | 38.0 | |
| March 21, 2019, noon | 24.9 ppb (23) | 3.3 ppb (3) | 21.7 ppb (20) | 22.0 ppb (20) | 19.6 ppb (18) | 0.0 ppb (0) | 3.0 ppb (2) | 0.27 ppb (3) | 14.0 μg/m3 (13) | 5.0 μg/m3 (21) | 23.0 | |
| March 21, 2019, 11 a.m. | 11.7 ppb (11) | 0.6 ppb (1) | 9.5 ppb (9) | 11.0 ppb (10) | 9.4 ppb (9) | 0.0 ppb (0) | 17.0 ppb (13) | 0.2 ppb (2) | 12.0 μg/m3 (11) | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2019, 10 a.m. | 10.7 ppb (10) | 0.8 ppb (1) | 8.5 ppb (8) | 10.0 ppb (9) | 8.3 ppb (8) | 0.0 ppb (0) | 17.0 ppb (13) | 0.17 ppb (2) | 9.0 μg/m3 (8) | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2019, 9 a.m. | 10.2 ppb (9) | 0.5 ppb (0) | 8.1 ppb (8) | 10.0 ppb (9) | 8.0 ppb (7) | 0.0 ppb (0) | 18.0 ppb (14) | 0.16 ppb (2) | 11.0 μg/m3 (10) | 7.0 μg/m3 (29) | 29.0 | |
| March 21, 2019, 8 a.m. | 9.6 ppb (9) | 0.6 ppb (1) | 8.3 ppb (8) | 9.0 ppb (8) | 8.3 ppb (8) | 0.0 ppb (0) | 20.0 ppb (15) | 0.18 ppb (2) | 14.0 μg/m3 (13) | 9.0 μg/m3 (38) | 38.0 | |
| March 21, 2019, 7 a.m. | 10.9 ppb (10) | 0.6 ppb (1) | 9.3 ppb (9) | 10.0 ppb (9) | 9.3 ppb (9) | 0.0 ppb (0) | 17.0 ppb (13) | 0.23 ppb (3) | 13.0 μg/m3 (12) | 8.0 μg/m3 (33) | 33.0 | |
| March 21, 2019, 6 a.m. | 11.0 ppb (10) | 0.6 ppb (1) | 9.3 ppb (9) | 10.0 ppb (9) | 9.3 ppb (9) | 0.0 ppb (0) | 20.0 ppb (15) | 0.27 ppb (3) | 13.0 μg/m3 (12) | 6.0 μg/m3 (25) | 25.0 | |
| March 21, 2019, 5 a.m. | 13.3 ppb (12) | 0.6 ppb (1) | 10.0 ppb (9) | 13.0 ppb (12) | 10.0 ppb (9) | 0.0 ppb (0) | 22.0 ppb (17) | 0.35 ppb (4) | 12.0 μg/m3 (11) | 4.0 μg/m3 (17) | 17.0 | |
| March 21, 2019, 4 a.m. | 12.3 ppb (11) | 0.5 ppb (0) | 10.3 ppb (10) | 12.0 ppb (11) | 10.2 ppb (9) | 0.0 ppb (0) | 26.0 ppb (20) | 0.42 ppb (5) | 7.0 μg/m3 (6) | 4.0 μg/m3 (17) | 20.0 | |
| March 21, 2019, 3 a.m. | 8.0 ppb (7) | 0.4 ppb (0) | 6.3 ppb (6) | 8.0 ppb (7) | 6.3 ppb (6) | 0.0 ppb (0) | 34.0 ppb (26) | 0.19 ppb (2) | 7.0 μg/m3 (6) | 3.0 μg/m3 (12) | 26.0 | |
| March 21, 2019, 2 a.m. | 8.9 ppb (8) | 0.4 ppb (0) | 7.2 ppb (7) | 8.0 ppb (7) | 7.1 ppb (7) | 0.0 ppb (0) | 34.0 ppb (26) | 0.18 ppb (2) | 9.0 μg/m3 (8) | 4.0 μg/m3 (17) | 26.0 | |
| March 21, 2019, 1 a.m. | 8.9 ppb (8) | 0.5 ppb (0) | 6.9 ppb (6) | 8.0 ppb (7) | 6.7 ppb (6) | 0.0 ppb (0) | 35.0 ppb (27) | 0.19 ppb (2) | 8.0 μg/m3 (7) | 5.0 μg/m3 (21) | 27.0 | |
| March 21, 2019, midnight | 6.6 ppb (6) | 0.5 ppb (0) | 4.8 ppb (4) | 6.0 ppb (6) | 4.6 ppb (4) | 0.0 ppb (0) | 42.0 ppb (32) | 0.17 ppb (2) | 10.0 μg/m3 (9) | 3.0 μg/m3 (12) | 32.0 | |
| March 20, 2019, 11 p.m. | 11.4 ppb (11) | 1.0 ppb (1) | 9.6 ppb (9) | 10.0 ppb (9) | 8.9 ppb (8) | 0.0 ppb (0) | 39.0 ppb (30) | 0.19 ppb (2) | 10.0 μg/m3 (9) | 4.0 μg/m3 (17) | 30.0 | |
| March 20, 2019, 10 p.m. | 12.0 ppb (11) | 1.8 ppb (2) | 10.0 ppb (9) | 10.0 ppb (9) | 8.7 ppb (8) | 0.0 ppb (0) | 41.0 ppb (32) | 0.18 ppb (2) | 10.0 μg/m3 (9) | 5.0 μg/m3 (21) | 32.0 | |
| March 20, 2019, 9 p.m. | 8.9 ppb (8) | 0.7 ppb (1) | 7.9 ppb (7) | 8.0 ppb (7) | 7.3 ppb (7) | 0.0 ppb (0) | 41.0 ppb (32) | 0.17 ppb (2) | 21.0 μg/m3 (19) | 6.0 μg/m3 (25) | 32.0 | |
| March 20, 2019, 8 p.m. | 6.9 ppb (6) | 0.9 ppb (1) | 6.5 ppb (6) | 6.0 ppb (6) | 5.8 ppb (5) | 0.0 ppb (0) | 46.0 ppb (35) | 0.16 ppb (2) | 25.0 μg/m3 (23) | 6.0 μg/m3 (25) | 35.0 | |
| March 20, 2019, 7 p.m. | 5.4 ppb (5) | 1.1 ppb (1) | 5.0 ppb (5) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 48.0 ppb (37) | 0.15 ppb (2) | 26.0 μg/m3 (24) | 6.0 μg/m3 (25) | 37.0 | |
| March 20, 2019, 6 p.m. | 7.3 ppb (7) | 1.5 ppb (1) | 6.6 ppb (6) | 6.0 ppb (6) | 5.4 ppb (5) | 0.0 ppb (0) | 44.0 ppb (34) | 0.16 ppb (2) | 18.0 μg/m3 (16) | 7.0 μg/m3 (29) | 34.0 | |
| March 20, 2019, 5 p.m. | 6.7 ppb (6) | 1.3 ppb (1) | 6.0 ppb (6) | 5.0 ppb (5) | 4.9 ppb (5) | 0.0 ppb (0) | 42.0 ppb (32) | 0.16 ppb (2) | 22.0 μg/m3 (20) | 7.0 μg/m3 (29) | 32.0 | |
| March 20, 2019, 4 p.m. | 9.6 ppb (9) | 2.4 ppb (2) | 8.7 ppb (8) | 7.0 ppb (6) | 6.5 ppb (6) | 0.0 ppb (0) | 35.0 ppb (27) | 0.2 ppb (2) | 26.0 μg/m3 (24) | 6.0 μg/m3 (25) | 27.0 | |
| March 20, 2019, 3 p.m. | 19.5 ppb (18) | 4.0 ppb (4) | 18.8 ppb (17) | 16.0 ppb (15) | 15.3 ppb (14) | 0.0 ppb (0) | 22.0 ppb (17) | 0.28 ppb (3) | 28.0 μg/m3 (25) | 7.0 μg/m3 (29) | 29.0 | |
| March 20, 2019, 2 p.m. | 32.0 ppb (30) | 5.9 ppb (5) | 30.7 ppb (28) | 26.0 ppb (24) | 25.2 ppb (23) | 0.0 ppb (0) | 7.0 ppb (5) | 0.45 ppb (5) | 35.0 μg/m3 (32) | 7.0 μg/m3 (29) | 32.0 | |
| March 20, 2019, 1 p.m. | 20.1 ppb (19) | 1.1 ppb (1) | 20.5 ppb (19) | 19.0 ppb (18) | 19.8 ppb (18) | 0.0 ppb (0) | 15.0 ppb (12) | 0.29 ppb (3) | 27.0 μg/m3 (25) | 7.0 μg/m3 (29) | 29.0 | |
| March 20, 2019, noon | 16.0 ppb (15) | 1.1 ppb (1) | 14.0 ppb (13) | 15.0 ppb (14) | 13.9 ppb (13) | 0.0 ppb (0) | 20.0 ppb (15) | 0.21 ppb (2) | 17.0 μg/m3 (15) | 6.0 μg/m3 (25) | 25.0 | |
| March 20, 2019, 11 a.m. | 7.8 ppb (7) | 0.5 ppb (0) | 6.7 ppb (6) | 7.0 ppb (6) | 6.5 ppb (6) | 0.0 ppb (0) | 31.0 ppb (24) | 0.16 ppb (2) | 19.0 μg/m3 (17) | 4.0 μg/m3 (17) | 24.0 | |
| March 20, 2019, 10 a.m. | 6.9 ppb (6) | 0.5 ppb (0) | 4.9 ppb (5) | 6.0 ppb (6) | 4.8 ppb (4) | 0.0 ppb (0) | 34.0 ppb (26) | 0.14 ppb (2) | 15.0 μg/m3 (14) | 5.0 μg/m3 (21) | 26.0 | |
| March 20, 2019, 9 a.m. | 4.0 ppb (4) | 0.4 ppb (0) | 3.1 ppb (3) | 4.0 ppb (4) | 3.0 ppb (3) | 0.0 ppb (0) | 40.0 ppb (31) | 0.13 ppb (1) | 18.0 μg/m3 (16) | 7.0 μg/m3 (29) | 31.0 | |
| March 20, 2019, 8 a.m. | 4.7 ppb (4) | 0.4 ppb (0) | 4.3 ppb (4) | 4.0 ppb (4) | 4.2 ppb (4) | 0.0 ppb (0) | 41.0 ppb (32) | 0.12 ppb (1) | 19.0 μg/m3 (17) | 7.0 μg/m3 (29) | 32.0 | |
| March 20, 2019, 7 a.m. | 4.8 ppb (4) | 0.4 ppb (0) | 4.0 ppb (4) | 4.0 ppb (4) | 4.0 ppb (4) | 0.0 ppb (0) | 43.0 ppb (33) | 0.15 ppb (2) | 20.0 μg/m3 (18) | 9.0 μg/m3 (38) | 38.0 | |
| March 20, 2019, 6 a.m. | 7.0 ppb (6) | 0.5 ppb (0) | 7.0 ppb (6) | 7.0 ppb (6) | 6.9 ppb (6) | 0.0 ppb (0) | 38.0 ppb (29) | 0.17 ppb (2) | 20.0 μg/m3 (18) | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, 5 a.m. | 9.3 ppb (9) | 0.6 ppb (1) | 8.6 ppb (8) | 9.0 ppb (8) | 8.6 ppb (8) | 0.0 ppb (0) | 33.0 ppb (25) | 0.19 ppb (2) | 21.0 μg/m3 (19) | 12.0 μg/m3 (50) | 50.0 | |
| March 20, 2019, 4 a.m. | 6.8 ppb (6) | 0.5 ppb (0) | 6.5 ppb (6) | 6.0 ppb (6) | 6.5 ppb (6) | 0.0 ppb (0) | 37.0 ppb (28) | 0.18 ppb (2) | 31.0 μg/m3 (28) | 13.0 μg/m3 (52) | 52.0 | |
| March 20, 2019, 3 a.m. | 9.0 ppb (8) | 0.6 ppb (1) | 8.7 ppb (8) | 8.0 ppb (7) | 8.5 ppb (8) | 0.0 ppb (0) | 37.0 ppb (28) | 0.21 ppb (2) | 25.0 μg/m3 (23) | 12.0 μg/m3 (50) | 50.0 | |
| March 20, 2019, 2 a.m. | 7.7 ppb (7) | 0.4 ppb (0) | 7.3 ppb (7) | 7.0 ppb (6) | 7.3 ppb (7) | 0.0 ppb (0) | 41.0 ppb (32) | 0.19 ppb (2) | 27.0 μg/m3 (25) | 10.0 μg/m3 (42) | 42.0 | |
| March 20, 2019, 1 a.m. | 6.2 ppb (6) | 0.5 ppb (0) | 6.2 ppb (6) | 6.0 ppb (6) | 6.1 ppb (6) | 0.0 ppb (0) | 46.0 ppb (35) | 0.18 ppb (2) | 40.0 μg/m3 (36) | 11.0 μg/m3 (46) | 46.0 | |
| March 20, 2019, midnight | 6.6 ppb (6) | 0.7 ppb (1) | 7.2 ppb (7) | 6.0 ppb (6) | 6.8 ppb (6) | 0.0 ppb (0) | 56.0 ppb (43) | 0.18 ppb (2) | 38.0 μg/m3 (35) | 12.0 μg/m3 (50) | 50.0 | |
| March 19, 2019, 11 p.m. | 7.8 ppb (7) | 1.0 ppb (1) | 8.4 ppb (8) | 7.0 ppb (6) | 7.7 ppb (7) | 0.0 ppb (0) | 58.0 ppb (45) | 0.19 ppb (2) | 40.0 μg/m3 (36) | 12.0 μg/m3 (50) | 50.0 | |
| March 19, 2019, 10 p.m. | 6.8 ppb (6) | 0.9 ppb (1) | 8.1 ppb (8) | 6.0 ppb (6) | 7.4 ppb (7) | 0.0 ppb (0) | 60.0 ppb (46) | 0.19 ppb (2) | 48.0 μg/m3 (44) | 12.0 μg/m3 (50) | 50.0 | |
| March 19, 2019, 9 p.m. | 9.0 ppb (8) | 1.3 ppb (1) | 10.7 ppb (10) | 8.0 ppb (7) | 9.8 ppb (9) | 1.0 ppb (1) | 59.0 ppb (45) | 0.25 ppb (3) | 72.0 μg/m3 (58) | 17.0 μg/m3 (61) | 61.0 | |
| March 19, 2019, 8 p.m. | 12.3 ppb (11) | 2.3 ppb (2) | 13.7 ppb (13) | 10.0 ppb (9) | 11.8 ppb (11) | 1.0 ppb (1) | 55.0 ppb (42) | 0.25 ppb (3) | 49.0 μg/m3 (45) | 13.0 μg/m3 (52) | 52.0 | |
| March 19, 2019, 7 p.m. | 23.4 ppb (22) | 5.0 ppb (5) | 24.9 ppb (23) | 18.0 ppb (17) | 20.1 ppb (19) | 1.0 ppb (1) | 47.0 ppb (36) | 0.28 ppb (3) | 52.0 μg/m3 (47) | 17.0 μg/m3 (61) | 61.0 | |
| March 19, 2019, 6 p.m. | N/A | N/A | 28.4 ppb (26) | N/A | 21.6 ppb (20) | 1.0 ppb (1) | N/A | 0.31 ppb (3) | 41.0 μg/m3 (37) | 15.0 μg/m3 (56) | 56.0 | |
| March 19, 2019, 5 p.m. | N/A | N/A | 34.8 ppb (32) | N/A | 23.9 ppb (22) | 1.0 ppb (1) | N/A | 0.37 ppb (4) | 37.0 μg/m3 (34) | 18.0 μg/m3 (63) | 63.0 | |
| March 19, 2019, 4 p.m. | N/A | N/A | 63.0 ppb (60) | N/A | 34.4 ppb (32) | 1.0 ppb (1) | N/A | 0.5 ppb (6) | 50.0 μg/m3 (45) | 15.0 μg/m3 (56) | 60.0 | |
| March 19, 2019, 3 p.m. | 100.4 ppb (99) | 63.4 ppb (60) | 98.6 ppb (97) | 37.0 ppb (34) | 37.8 ppb (35) | 1.0 ppb (1) | 4.0 ppb (3) | 0.66 ppb (7) | 64.0 μg/m3 (54) | 17.0 μg/m3 (61) | 99.0 | |
| March 19, 2019, 2 p.m. | 117.8 ppb (103) | 84.4 ppb (82) | 116.3 ppb (103) | 33.0 ppb (31) | 34.8 ppb (32) | 1.0 ppb (1) | 0.0 ppb (0) | 0.84 ppb (9) | 75.0 μg/m3 (60) | 16.0 μg/m3 (59) | 103.0 | |
| March 19, 2019, 1 p.m. | 85.0 ppb (83) | 54.5 ppb (51) | 72.1 ppb (69) | 30.0 ppb (28) | 29.2 ppb (27) | 1.0 ppb (1) | 0.0 ppb (0) | 0.62 ppb (7) | 47.0 μg/m3 (43) | 12.0 μg/m3 (50) | 83.0 | |
| March 19, 2019, noon | 83.1 ppb (81) | 54.6 ppb (51) | 84.0 ppb (82) | 28.0 ppb (26) | 31.6 ppb (29) | 1.0 ppb (1) | 0.0 ppb (0) | 0.61 ppb (7) | 49.0 μg/m3 (45) | 12.0 μg/m3 (50) | 82.0 | |
| March 19, 2019, 11 a.m. | 70.3 ppb (67) | 34.0 ppb (31) | 72.5 ppb (70) | 36.0 ppb (33) | 34.7 ppb (32) | 1.0 ppb (1) | 0.0 ppb (0) | 0.48 ppb (5) | 43.0 μg/m3 (39) | 16.0 μg/m3 (59) | 70.0 | |
| March 19, 2019, 10 a.m. | 49.5 ppb (46) | 13.3 ppb (12) | 52.4 ppb (49) | 36.0 ppb (33) | 39.1 ppb (36) | 1.0 ppb (1) | 0.0 ppb (0) | 0.48 ppb (5) | 36.0 μg/m3 (33) | 16.0 μg/m3 (59) | 59.0 | |
| March 19, 2019, 9 a.m. | 40.7 ppb (38) | 5.5 ppb (5) | 36.4 ppb (34) | 35.0 ppb (32) | 32.2 ppb (30) | 0.0 ppb (0) | 3.0 ppb (2) | 0.48 ppb (5) | 35.0 μg/m3 (32) | 10.0 μg/m3 (42) | 42.0 | |
| March 19, 2019, 8 a.m. | 38.3 ppb (35) | 3.0 ppb (3) | 35.4 ppb (33) | 35.0 ppb (32) | 34.1 ppb (32) | 0.0 ppb (0) | 3.0 ppb (2) | 0.51 ppb (6) | 29.0 μg/m3 (26) | 13.0 μg/m3 (52) | 52.0 | |
| March 19, 2019, 7 a.m. | 24.8 ppb (23) | 2.0 ppb (2) | 25.4 ppb (24) | 23.0 ppb (21) | 24.1 ppb (22) | 0.0 ppb (0) | 19.0 ppb (15) | 0.44 ppb (5) | 30.0 μg/m3 (27) | 11.0 μg/m3 (46) | 46.0 | |
| March 19, 2019, 6 a.m. | 18.4 ppb (17) | 0.8 ppb (1) | 18.8 ppb (17) | 18.0 ppb (17) | 18.8 ppb (17) | 1.0 ppb (1) | 28.0 ppb (22) | 0.31 ppb (3) | 35.0 μg/m3 (32) | 9.0 μg/m3 (38) | 38.0 | |
| March 19, 2019, 5 a.m. | 24.8 ppb (23) | 0.8 ppb (1) | 23.7 ppb (22) | 24.0 ppb (22) | 23.6 ppb (22) | 0.0 ppb (0) | 29.0 ppb (22) | 0.32 ppb (4) | 35.0 μg/m3 (32) | 7.0 μg/m3 (29) | 32.0 | |
| March 19, 2019, 4 a.m. | 28.5 ppb (26) | 0.9 ppb (1) | 26.7 ppb (25) | 28.0 ppb (26) | 26.6 ppb (25) | 1.0 ppb (1) | 26.0 ppb (20) | 0.42 ppb (5) | 38.0 μg/m3 (35) | 5.0 μg/m3 (21) | 35.0 | |
| March 19, 2019, 3 a.m. | 13.3 ppb (12) | 0.5 ppb (0) | 12.5 ppb (12) | 13.0 ppb (12) | 12.5 ppb (12) | 1.0 ppb (1) | 47.0 ppb (36) | 0.26 ppb (3) | 29.0 μg/m3 (26) | 5.0 μg/m3 (21) | 36.0 | |
| March 19, 2019, 2 a.m. | 9.3 ppb (9) | 0.4 ppb (0) | 8.7 ppb (8) | 9.0 ppb (8) | 8.6 ppb (8) | 1.0 ppb (1) | 57.0 ppb (44) | 0.23 ppb (3) | 31.0 μg/m3 (28) | 6.0 μg/m3 (25) | 44.0 | |
| March 19, 2019, 1 a.m. | 7.3 ppb (7) | 0.4 ppb (0) | 6.8 ppb (6) | 7.0 ppb (6) | 6.7 ppb (6) | 1.0 ppb (1) | 62.0 ppb (48) | 0.21 ppb (2) | 33.0 μg/m3 (30) | 6.0 μg/m3 (25) | 48.0 | |
| March 19, 2019, midnight | 6.4 ppb (6) | 0.6 ppb (1) | 6.0 ppb (6) | 6.0 ppb (6) | 5.6 ppb (5) | 1.0 ppb (1) | 65.0 ppb (50) | 0.19 ppb (2) | 41.0 μg/m3 (37) | 3.0 μg/m3 (12) | 50.0 | |
| March 18, 2019, 11 p.m. | 4.8 ppb (4) | 0.6 ppb (1) | 4.4 ppb (4) | 4.0 ppb (4) | 4.0 ppb (4) | 1.0 ppb (1) | 64.0 ppb (49) | 0.15 ppb (2) | 31.0 μg/m3 (28) | 4.0 μg/m3 (17) | 49.0 | |
| March 18, 2019, 10 p.m. | 4.8 ppb (4) | 0.6 ppb (1) | 4.7 ppb (4) | 4.0 ppb (4) | 4.3 ppb (4) | 1.0 ppb (1) | 64.0 ppb (49) | 0.17 ppb (2) | 25.0 μg/m3 (23) | 6.0 μg/m3 (25) | 49.0 | |
| March 18, 2019, 9 p.m. | 6.3 ppb (6) | 0.9 ppb (1) | 6.2 ppb (6) | 5.0 ppb (5) | 5.5 ppb (5) | 1.0 ppb (1) | 62.0 ppb (48) | 0.17 ppb (2) | 32.0 μg/m3 (29) | 5.0 μg/m3 (21) | 48.0 | |
| March 18, 2019, 8 p.m. | 4.2 ppb (4) | 0.7 ppb (1) | 3.5 ppb (3) | 3.0 ppb (3) | 3.1 ppb (3) | 0.0 ppb (0) | 57.0 ppb (44) | 0.13 ppb (1) | 18.0 μg/m3 (16) | 3.0 μg/m3 (12) | 44.0 | |
| March 18, 2019, 7 p.m. | 7.0 ppb (6) | 1.3 ppb (1) | 6.4 ppb (6) | 6.0 ppb (6) | 5.2 ppb (5) | 1.0 ppb (1) | 53.0 ppb (41) | 0.16 ppb (2) | 16.0 μg/m3 (15) | 1.0 μg/m3 (4) | 41.0 | |
| March 18, 2019, 6 p.m. | 12.1 ppb (11) | 2.5 ppb (2) | 11.3 ppb (10) | 10.0 ppb (9) | 8.9 ppb (8) | 1.0 ppb (1) | 47.0 ppb (36) | 0.19 ppb (2) | 21.0 μg/m3 (19) | 3.0 μg/m3 (12) | 36.0 | |
| March 18, 2019, 5 p.m. | 24.2 ppb (22) | 7.3 ppb (7) | 23.2 ppb (21) | 17.0 ppb (16) | 16.0 ppb (15) | 1.0 ppb (1) | 33.0 ppb (25) | 0.25 ppb (3) | 26.0 μg/m3 (24) | 7.0 μg/m3 (29) | 29.0 | |
| March 18, 2019, 4 p.m. | 58.8 ppb (55) | 27.9 ppb (26) | 57.9 ppb (54) | 31.0 ppb (29) | 29.9 ppb (28) | 1.0 ppb (1) | 13.0 ppb (10) | 0.39 ppb (4) | 48.0 μg/m3 (44) | 12.0 μg/m3 (50) | 55.0 | |
| March 18, 2019, 3 p.m. | 95.3 ppb (94) | 60.7 ppb (57) | 93.5 ppb (92) | 35.0 ppb (32) | 34.5 ppb (32) | 1.0 ppb (1) | 4.0 ppb (3) | 0.64 ppb (7) | 82.0 μg/m3 (64) | 19.0 μg/m3 (65) | 94.0 | |
| March 18, 2019, 2 p.m. | 102.8 ppb (100) | 69.5 ppb (66) | 97.0 ppb (96) | 33.0 ppb (31) | 34.1 ppb (32) | 1.0 ppb (1) | 1.0 ppb (1) | 0.7 ppb (8) | 74.0 μg/m3 (60) | 16.0 μg/m3 (59) | 100.0 | |
| March 18, 2019, 1 p.m. | 99.5 ppb (98) | 67.8 ppb (65) | 98.5 ppb (97) | 32.0 ppb (30) | 30.8 ppb (29) | 1.0 ppb (1) | 0.0 ppb (0) | 0.62 ppb (7) | 62.0 μg/m3 (54) | 12.0 μg/m3 (50) | 98.0 | |
| March 18, 2019, noon | 96.5 ppb (95) | 63.0 ppb (60) | 91.9 ppb (90) | 33.0 ppb (31) | 35.0 ppb (32) | 1.0 ppb (1) | 0.0 ppb (0) | 0.63 ppb (7) | 59.0 μg/m3 (52) | 12.0 μg/m3 (50) | 95.0 | |
| March 18, 2019, 11 a.m. | 59.9 ppb (56) | 24.6 ppb (23) | 63.2 ppb (60) | 35.0 ppb (32) | 32.6 ppb (30) | 1.0 ppb (1) | 0.0 ppb (0) | 0.47 ppb (5) | 34.0 μg/m3 (31) | 13.0 μg/m3 (52) | 60.0 | |
| March 18, 2019, 10 a.m. | 51.7 ppb (48) | 17.8 ppb (16) | 48.2 ppb (45) | 34.0 ppb (31) | 34.1 ppb (32) | 1.0 ppb (1) | 0.0 ppb (0) | 0.42 ppb (5) | 43.0 μg/m3 (39) | 16.0 μg/m3 (59) | 59.0 | |
| March 18, 2019, 9 a.m. | 49.5 ppb (46) | 12.0 ppb (11) | 41.5 ppb (38) | 38.0 ppb (35) | 34.2 ppb (32) | 1.0 ppb (1) | 0.0 ppb (0) | 0.48 ppb (5) | 37.0 μg/m3 (34) | 18.0 μg/m3 (63) | 63.0 | |
| March 18, 2019, 8 a.m. | 49.8 ppb (46) | 9.4 ppb (9) | 46.4 ppb (43) | 40.0 ppb (37) | 40.7 ppb (38) | 1.0 ppb (1) | 1.0 ppb (1) | 0.53 ppb (6) | 43.0 μg/m3 (39) | 11.0 μg/m3 (46) | 46.0 | |
| March 18, 2019, 7 a.m. | 41.6 ppb (39) | 2.2 ppb (2) | 41.1 ppb (38) | 39.0 ppb (36) | 40.2 ppb (37) | 1.0 ppb (1) | 5.0 ppb (4) | 0.53 ppb (6) | 48.0 μg/m3 (44) | 11.0 μg/m3 (46) | 46.0 | |
| March 18, 2019, 6 a.m. | 34.8 ppb (32) | 1.1 ppb (1) | 34.6 ppb (32) | 34.0 ppb (31) | 34.5 ppb (32) | 1.0 ppb (1) | 12.0 ppb (9) | 0.47 ppb (5) | 58.0 μg/m3 (52) | 9.0 μg/m3 (38) | 52.0 | |
| March 18, 2019, 5 a.m. | 32.0 ppb (30) | 1.0 ppb (1) | 28.4 ppb (26) | 31.0 ppb (29) | 28.2 ppb (26) | 1.0 ppb (1) | 19.0 ppb (15) | 0.52 ppb (6) | 51.0 μg/m3 (46) | 9.0 μg/m3 (38) | 46.0 | |
| March 18, 2019, 4 a.m. | 28.6 ppb (26) | 1.0 ppb (1) | 24.2 ppb (22) | 28.0 ppb (26) | 24.0 ppb (22) | 1.0 ppb (1) | 27.0 ppb (21) | 0.45 ppb (5) | 33.0 μg/m3 (30) | 10.0 μg/m3 (42) | 42.0 | |
| March 18, 2019, 3 a.m. | 14.6 ppb (14) | 1.1 ppb (1) | 12.6 ppb (12) | 14.0 ppb (13) | 12.6 ppb (12) | 1.0 ppb (1) | 44.0 ppb (34) | 0.26 ppb (3) | 28.0 μg/m3 (25) | 8.0 μg/m3 (33) | 34.0 | |
| March 18, 2019, 2 a.m. | 10.2 ppb (9) | 0.4 ppb (0) | 9.0 ppb (8) | 10.0 ppb (9) | 9.0 ppb (8) | 1.0 ppb (1) | 51.0 ppb (39) | 0.24 ppb (3) | 40.0 μg/m3 (36) | 8.0 μg/m3 (33) | 39.0 | |
| March 18, 2019, 1 a.m. | 9.1 ppb (8) | 0.5 ppb (0) | 8.0 ppb (7) | 9.0 ppb (8) | 7.8 ppb (7) | 1.0 ppb (1) | 58.0 ppb (45) | 0.22 ppb (2) | 37.0 μg/m3 (34) | 8.0 μg/m3 (33) | 45.0 | |
| March 18, 2019, midnight | 2.8 ppb (3) | 0.3 ppb (0) | 1.8 ppb (2) | 2.0 ppb (2) | 1.7 ppb (2) | 1.0 ppb (1) | 54.0 ppb (42) | 0.11 ppb (1) | 14.0 μg/m3 (13) | 5.0 μg/m3 (21) | 42.0 | |
| March 17, 2019, 11 p.m. | 2.6 ppb (2) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | 1.0 ppb (1) | 54.0 ppb (42) | 0.11 ppb (1) | 13.0 μg/m3 (12) | 3.0 μg/m3 (12) | 42.0 | |
| March 17, 2019, 10 p.m. | 2.7 ppb (3) | 0.4 ppb (0) | 1.7 ppb (2) | 2.0 ppb (2) | 1.4 ppb (1) | 0.0 ppb (0) | 52.0 ppb (40) | 0.11 ppb (1) | 14.0 μg/m3 (13) | 1.0 μg/m3 (4) | 40.0 | |
| March 17, 2019, 9 p.m. | 3.1 ppb (3) | 0.5 ppb (0) | 2.1 ppb (2) | 3.0 ppb (3) | 1.8 ppb (2) | 1.0 ppb (1) | 53.0 ppb (41) | 0.12 ppb (1) | 17.0 μg/m3 (15) | -2.0 μg/m3 (0) | 41.0 | |
| March 17, 2019, 8 p.m. | 4.0 ppb (4) | 0.6 ppb (1) | 3.2 ppb (3) | 3.0 ppb (3) | 2.7 ppb (3) | 1.0 ppb (1) | 55.0 ppb (42) | 0.13 ppb (1) | 22.0 μg/m3 (20) | 1.0 μg/m3 (4) | 42.0 | |
| March 17, 2019, 7 p.m. | 3.8 ppb (4) | 0.7 ppb (1) | 2.9 ppb (3) | 3.0 ppb (3) | 2.4 ppb (2) | 1.0 ppb (1) | 54.0 ppb (42) | 0.12 ppb (1) | 14.0 μg/m3 (13) | 2.0 μg/m3 (8) | 42.0 | |
| March 17, 2019, 6 p.m. | 4.9 ppb (5) | 1.0 ppb (1) | 3.8 ppb (4) | 4.0 ppb (4) | 3.1 ppb (3) | 1.0 ppb (1) | 50.0 ppb (38) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 3.0 μg/m3 (12) | 38.0 | |
| March 17, 2019, 5 p.m. | 18.4 ppb (17) | 5.0 ppb (5) | 16.8 ppb (16) | 13.0 ppb (12) | 12.0 ppb (11) | 1.0 ppb (1) | 34.0 ppb (26) | 0.25 ppb (3) | 23.0 μg/m3 (21) | 5.0 μg/m3 (21) | 26.0 | |
| March 17, 2019, 4 p.m. | 28.7 ppb (27) | 10.3 ppb (10) | 26.8 ppb (25) | 18.0 ppb (17) | 16.9 ppb (16) | 1.0 ppb (1) | 21.0 ppb (16) | 0.31 ppb (3) | 29.0 μg/m3 (26) | 8.0 μg/m3 (33) | 33.0 | |
| March 17, 2019, 3 p.m. | 48.7 ppb (45) | 23.9 ppb (22) | 45.8 ppb (42) | 25.0 ppb (23) | 23.6 ppb (22) | 1.0 ppb (1) | 8.0 ppb (6) | 0.38 ppb (4) | 35.0 μg/m3 (32) | 9.0 μg/m3 (38) | 45.0 | |
| March 17, 2019, 2 p.m. | 60.0 ppb (56) | 32.1 ppb (30) | 56.2 ppb (52) | 28.0 ppb (26) | 28.2 ppb (26) | 1.0 ppb (1) | 1.0 ppb (1) | 0.5 ppb (6) | 35.0 μg/m3 (32) | 7.0 μg/m3 (29) | 56.0 | |
| March 17, 2019, 1 p.m. | 57.8 ppb (54) | 28.1 ppb (26) | 50.1 ppb (46) | 30.0 ppb (28) | 27.8 ppb (26) | 1.0 ppb (1) | 0.0 ppb (0) | 0.47 ppb (5) | 29.0 μg/m3 (26) | 9.0 μg/m3 (38) | 54.0 | |
| March 17, 2019, noon | 51.4 ppb (48) | 22.9 ppb (21) | 46.4 ppb (43) | 29.0 ppb (27) | 29.2 ppb (27) | 1.0 ppb (1) | 0.0 ppb (0) | 0.46 ppb (5) | 31.0 μg/m3 (28) | 10.0 μg/m3 (42) | 48.0 | |
| March 17, 2019, 11 a.m. | 46.2 ppb (43) | 16.7 ppb (15) | 41.5 ppb (38) | 30.0 ppb (28) | 28.2 ppb (26) | 1.0 ppb (1) | 0.0 ppb (0) | 0.48 ppb (5) | 28.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| March 17, 2019, 10 a.m. | 44.1 ppb (41) | 13.1 ppb (12) | 42.1 ppb (39) | 31.0 ppb (29) | 31.1 ppb (29) | 1.0 ppb (1) | 0.0 ppb (0) | 0.4 ppb (4) | 31.0 μg/m3 (28) | 13.0 μg/m3 (52) | 52.0 | |
| March 17, 2019, 9 a.m. | 43.5 ppb (40) | 13.7 ppb (13) | 39.4 ppb (36) | 30.0 ppb (28) | 28.2 ppb (26) | 1.0 ppb (1) | 0.0 ppb (0) | 0.65 ppb (7) | 49.0 μg/m3 (45) | 12.0 μg/m3 (50) | 50.0 | |
| March 17, 2019, 8 a.m. | 38.8 ppb (36) | 8.1 ppb (8) | 35.7 ppb (33) | 31.0 ppb (29) | 31.7 ppb (29) | 1.0 ppb (1) | 1.0 ppb (1) | 0.7 ppb (8) | 35.0 μg/m3 (32) | 11.0 μg/m3 (46) | 46.0 | |
| March 17, 2019, 7 a.m. | 33.1 ppb (31) | 2.4 ppb (2) | 31.9 ppb (30) | 31.0 ppb (29) | 30.8 ppb (29) | 1.0 ppb (1) | 4.0 ppb (3) | 0.5 ppb (6) | 36.0 μg/m3 (33) | 15.0 μg/m3 (56) | 56.0 | |
| March 17, 2019, 6 a.m. | 29.3 ppb (27) | 1.5 ppb (1) | 26.6 ppb (25) | 28.0 ppb (26) | 26.2 ppb (24) | 1.0 ppb (1) | 14.0 ppb (11) | 0.38 ppb (4) | 29.0 μg/m3 (26) | 5.0 μg/m3 (21) | 27.0 | |
| March 17, 2019, 5 a.m. | 21.8 ppb (20) | 1.0 ppb (1) | 20.5 ppb (19) | 21.0 ppb (19) | 20.3 ppb (19) | 1.0 ppb (1) | 21.0 ppb (16) | 0.35 ppb (4) | 38.0 μg/m3 (35) | 4.0 μg/m3 (17) | 35.0 | |
| March 17, 2019, 4 a.m. | 18.8 ppb (17) | 0.6 ppb (1) | 16.2 ppb (15) | 18.0 ppb (17) | 16.0 ppb (15) | 1.0 ppb (1) | 27.0 ppb (21) | 0.27 ppb (3) | 34.0 μg/m3 (31) | 3.0 μg/m3 (12) | 31.0 | |
| March 17, 2019, 3 a.m. | 11.0 ppb (10) | 0.4 ppb (0) | 9.6 ppb (9) | 11.0 ppb (10) | 9.5 ppb (9) | 0.0 ppb (0) | 40.0 ppb (31) | 0.17 ppb (2) | 16.0 μg/m3 (15) | 2.0 μg/m3 (8) | 31.0 | |
| March 17, 2019, 2 a.m. | 6.7 ppb (6) | 0.4 ppb (0) | 6.0 ppb (6) | 6.0 ppb (6) | 5.7 ppb (5) | 1.0 ppb (1) | 46.0 ppb (35) | 0.16 ppb (2) | 30.0 μg/m3 (27) | 3.0 μg/m3 (12) | 35.0 | |
| March 17, 2019, 1 a.m. | 5.9 ppb (5) | 0.5 ppb (0) | 5.1 ppb (5) | 5.0 ppb (5) | 4.8 ppb (4) | 0.0 ppb (0) | 48.0 ppb (37) | 0.15 ppb (2) | 25.0 μg/m3 (23) | 3.0 μg/m3 (12) | 37.0 | |
| March 17, 2019, midnight | 4.7 ppb (4) | 0.6 ppb (1) | 3.5 ppb (3) | 4.0 ppb (4) | 3.0 ppb (3) | 1.0 ppb (1) | 51.0 ppb (39) | 0.13 ppb (1) | 20.0 μg/m3 (18) | 1.0 μg/m3 (4) | 39.0 | |
| March 16, 2019, 11 p.m. | 4.3 ppb (4) | 0.7 ppb (1) | 3.1 ppb (3) | 4.0 ppb (4) | 2.5 ppb (2) | 1.0 ppb (1) | 52.0 ppb (40) | 0.13 ppb (1) | 20.0 μg/m3 (18) | 1.0 μg/m3 (4) | 40.0 | |
| March 16, 2019, 10 p.m. | 3.6 ppb (3) | 0.7 ppb (1) | 2.6 ppb (2) | 3.0 ppb (3) | 2.0 ppb (2) | 0.0 ppb (0) | 52.0 ppb (40) | 0.12 ppb (1) | 10.0 μg/m3 (9) | -1.0 μg/m3 (0) | 40.0 | |
| March 16, 2019, 9 p.m. | 3.6 ppb (3) | 0.7 ppb (1) | 2.6 ppb (2) | 3.0 ppb (3) | 2.0 ppb (2) | 0.0 ppb (0) | 52.0 ppb (40) | 0.12 ppb (1) | 12.0 μg/m3 (11) | N/A | 40.0 | |
| March 16, 2019, 8 p.m. | 3.8 ppb (4) | 0.8 ppb (1) | 2.9 ppb (3) | 3.0 ppb (3) | 2.1 ppb (2) | 0.0 ppb (0) | 50.0 ppb (38) | 0.12 ppb (1) | 17.0 μg/m3 (15) | -2.0 μg/m3 (0) | 38.0 | |
| March 16, 2019, 7 p.m. | 4.4 ppb (4) | 1.0 ppb (1) | 3.3 ppb (3) | 3.0 ppb (3) | 2.4 ppb (2) | 0.0 ppb (0) | 48.0 ppb (37) | 0.12 ppb (1) | 23.0 μg/m3 (21) | 0.0 μg/m3 (0) | 37.0 | |
| March 16, 2019, 6 p.m. | 4.8 ppb (4) | 1.1 ppb (1) | 3.6 ppb (3) | 4.0 ppb (4) | 2.6 ppb (2) | 0.0 ppb (0) | 47.0 ppb (36) | 0.12 ppb (1) | 27.0 μg/m3 (25) | 2.0 μg/m3 (8) | 36.0 | |
| March 16, 2019, 5 p.m. | 6.3 ppb (6) | 1.4 ppb (1) | 5.1 ppb (5) | 5.0 ppb (5) | 3.8 ppb (4) | 1.0 ppb (1) | 46.0 ppb (35) | 0.13 ppb (1) | 15.0 μg/m3 (14) | 4.0 μg/m3 (17) | 35.0 | |
| March 16, 2019, 4 p.m. | 12.6 ppb (12) | 3.0 ppb (3) | 11.3 ppb (10) | 10.0 ppb (9) | 8.3 ppb (8) | 0.0 ppb (0) | 39.0 ppb (30) | 0.16 ppb (2) | 15.0 μg/m3 (14) | 2.0 μg/m3 (8) | 30.0 | |
| March 16, 2019, 3 p.m. | 5.9 ppb (5) | 1.0 ppb (1) | 4.5 ppb (4) | 5.0 ppb (5) | 3.6 ppb (3) | 0.0 ppb (0) | 43.0 ppb (33) | 0.13 ppb (1) | 13.0 μg/m3 (12) | -1.0 μg/m3 (0) | 33.0 | |
| March 16, 2019, 2 p.m. | 7.1 ppb (7) | 0.8 ppb (1) | 5.6 ppb (5) | 6.0 ppb (6) | 5.1 ppb (5) | 0.0 ppb (0) | 42.0 ppb (32) | 0.13 ppb (1) | 10.0 μg/m3 (9) | -1.0 μg/m3 (0) | 32.0 |