LA (Chavez Ravine Place) CA, US: 34.0669, -118.2417
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 22, 2019, 6 p.m. | 21.6 ppb (20) | 3.4 ppb (3) | 18.5 ppb (17) | 18.0 ppb (17) | 15.0 ppb (14) | 1.0 ppb (1) | 51.0 ppb (39) | N/A | N/A | N/A | 39.0 | |
| Sept. 22, 2019, 5 p.m. | 30.5 ppb (28) | 6.2 ppb (6) | 26.6 ppb (25) | 24.0 ppb (22) | 20.1 ppb (19) | 1.0 ppb (1) | 36.0 ppb (28) | N/A | N/A | N/A | 28.0 | |
| Sept. 22, 2019, 4 p.m. | 44.6 ppb (41) | 13.7 ppb (13) | 38.9 ppb (36) | 31.0 ppb (29) | 25.0 ppb (23) | 1.0 ppb (1) | 19.0 ppb (15) | N/A | N/A | N/A | 41.0 | |
| Sept. 22, 2019, 3 p.m. | 39.8 ppb (37) | 11.8 ppb (11) | 34.2 ppb (32) | 28.0 ppb (26) | 22.3 ppb (21) | 1.0 ppb (1) | 15.0 ppb (12) | N/A | N/A | N/A | 37.0 | |
| Sept. 22, 2019, 2 p.m. | 39.6 ppb (37) | 10.5 ppb (10) | 34.3 ppb (32) | 29.0 ppb (27) | 24.3 ppb (23) | 0.0 ppb (0) | 9.0 ppb (7) | N/A | N/A | N/A | 37.0 | |
| Sept. 22, 2019, 1 p.m. | 33.5 ppb (31) | 3.4 ppb (3) | 26.2 ppb (24) | 30.0 ppb (28) | 23.9 ppb (22) | 0.0 ppb (0) | 9.0 ppb (7) | N/A | N/A | N/A | 31.0 | |
| Sept. 22, 2019, noon | 31.0 ppb (29) | 2.5 ppb (2) | 25.5 ppb (24) | 29.0 ppb (27) | 24.7 ppb (23) | 0.0 ppb (0) | 9.0 ppb (7) | N/A | N/A | N/A | 29.0 | |
| Sept. 22, 2019, 11 a.m. | 33.0 ppb (31) | 4.2 ppb (4) | 25.3 ppb (23) | 29.0 ppb (27) | 23.0 ppb (21) | 0.0 ppb (0) | 6.0 ppb (5) | N/A | N/A | N/A | 31.0 | |
| Sept. 22, 2019, 10 a.m. | 26.5 ppb (25) | 2.6 ppb (2) | 21.7 ppb (20) | 24.0 ppb (22) | 21.3 ppb (20) | 0.0 ppb (0) | 9.0 ppb (7) | N/A | N/A | N/A | 25.0 | |
| Sept. 22, 2019, 9 a.m. | 35.3 ppb (33) | 7.1 ppb (7) | 26.0 ppb (24) | 28.0 ppb (26) | 21.9 ppb (20) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | N/A | N/A | 33.0 | |
| Sept. 22, 2019, 8 a.m. | 31.7 ppb (29) | 4.9 ppb (5) | 26.5 ppb (25) | 27.0 ppb (25) | 24.6 ppb (23) | 0.0 ppb (0) | 5.0 ppb (4) | N/A | N/A | N/A | 29.0 | |
| Sept. 22, 2019, 7 a.m. | 27.2 ppb (25) | 2.1 ppb (2) | 23.2 ppb (21) | 25.0 ppb (23) | 22.7 ppb (21) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | N/A | N/A | 25.0 | |
| Sept. 22, 2019, 6 a.m. | 27.3 ppb (25) | 2.1 ppb (2) | 23.9 ppb (22) | 25.0 ppb (23) | 23.2 ppb (21) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | N/A | N/A | 25.0 | |
| Sept. 22, 2019, 5 a.m. | 28.1 ppb (26) | 1.9 ppb (2) | 23.8 ppb (22) | 26.0 ppb (24) | 23.3 ppb (22) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | N/A | N/A | 26.0 | |
| Sept. 22, 2019, 4 a.m. | 26.7 ppb (25) | 2.5 ppb (2) | 22.3 ppb (21) | 24.0 ppb (22) | 20.7 ppb (19) | 0.0 ppb (0) | 13.0 ppb (10) | N/A | N/A | N/A | 25.0 | |
| Sept. 22, 2019, 3 a.m. | 15.7 ppb (15) | 1.0 ppb (1) | 11.3 ppb (10) | 15.0 ppb (14) | 11.2 ppb (10) | 0.0 ppb (0) | 24.0 ppb (18) | N/A | N/A | N/A | 18.0 | |
| Sept. 22, 2019, 2 a.m. | 9.7 ppb (9) | 0.6 ppb (1) | 5.6 ppb (5) | 9.0 ppb (8) | 5.5 ppb (5) | 0.0 ppb (0) | 36.0 ppb (28) | N/A | N/A | N/A | 28.0 | |
| Sept. 22, 2019, 1 a.m. | 7.5 ppb (7) | 0.3 ppb (0) | 4.3 ppb (4) | 7.0 ppb (6) | 4.2 ppb (4) | 0.0 ppb (0) | 50.0 ppb (38) | N/A | N/A | N/A | 38.0 | |
| Sept. 22, 2019, midnight | 8.0 ppb (7) | 0.4 ppb (0) | 5.1 ppb (5) | 8.0 ppb (7) | 4.7 ppb (4) | 1.0 ppb (1) | 63.0 ppb (48) | N/A | N/A | N/A | 48.0 | |
| Sept. 21, 2019, 11 p.m. | 8.0 ppb (7) | 0.5 ppb (0) | 5.6 ppb (5) | 7.0 ppb (6) | 5.0 ppb (5) | 1.0 ppb (1) | 68.0 ppb (52) | N/A | N/A | N/A | 52.0 | |
| Sept. 21, 2019, 10 p.m. | 12.4 ppb (11) | 0.9 ppb (1) | 10.1 ppb (9) | 11.0 ppb (10) | 9.0 ppb (8) | 1.0 ppb (1) | 76.0 ppb (59) | N/A | N/A | N/A | 59.0 | |
| Sept. 21, 2019, 9 p.m. | 14.9 ppb (14) | 1.3 ppb (1) | 12.6 ppb (12) | 14.0 ppb (13) | 11.2 ppb (10) | 1.0 ppb (1) | 73.0 ppb (57) | N/A | N/A | N/A | 57.0 | |
| Sept. 21, 2019, 8 p.m. | 14.5 ppb (13) | 1.3 ppb (1) | 12.3 ppb (11) | 13.0 ppb (12) | 10.9 ppb (10) | 1.0 ppb (1) | 74.0 ppb (57) | N/A | N/A | N/A | 57.0 | |
| Sept. 21, 2019, 7 p.m. | 22.8 ppb (21) | 3.3 ppb (3) | 19.8 ppb (18) | 20.0 ppb (19) | 16.2 ppb (15) | 1.0 ppb (1) | 58.0 ppb (45) | N/A | N/A | N/A | 45.0 | |
| Sept. 21, 2019, 6 p.m. | 26.6 ppb (25) | 5.4 ppb (5) | 23.1 ppb (21) | 21.0 ppb (19) | 17.1 ppb (16) | 1.0 ppb (1) | 43.0 ppb (33) | N/A | N/A | N/A | 33.0 | |
| Sept. 21, 2019, 5 p.m. | 30.8 ppb (29) | 8.2 ppb (8) | 26.3 ppb (24) | 23.0 ppb (21) | 17.7 ppb (16) | 1.0 ppb (1) | 31.0 ppb (24) | N/A | N/A | N/A | 29.0 | |
| Sept. 21, 2019, 4 p.m. | 24.6 ppb (23) | 6.8 ppb (6) | 19.8 ppb (18) | 18.0 ppb (17) | 13.0 ppb (12) | 1.0 ppb (1) | 26.0 ppb (20) | N/A | N/A | N/A | 23.0 | |
| Sept. 21, 2019, 3 p.m. | 34.7 ppb (32) | 13.8 ppb (13) | 28.6 ppb (26) | 21.0 ppb (19) | 15.3 ppb (14) | 0.0 ppb (0) | 14.0 ppb (11) | N/A | N/A | N/A | 32.0 | |
| Sept. 21, 2019, 2 p.m. | 51.7 ppb (48) | 28.8 ppb (27) | 39.6 ppb (37) | 23.0 ppb (21) | 15.6 ppb (14) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | N/A | N/A | 48.0 | |
| Sept. 21, 2019, 1 p.m. | 38.7 ppb (36) | 18.5 ppb (17) | 26.4 ppb (24) | 20.0 ppb (19) | 13.3 ppb (12) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | N/A | N/A | 36.0 | |
| Sept. 21, 2019, noon | 40.7 ppb (38) | 20.6 ppb (19) | 33.3 ppb (31) | 20.0 ppb (19) | 14.8 ppb (14) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | N/A | N/A | 38.0 | |
| Sept. 21, 2019, 11 a.m. | 47.2 ppb (44) | 24.6 ppb (23) | 38.8 ppb (36) | 23.0 ppb (21) | 12.7 ppb (12) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | N/A | N/A | 44.0 | |
| Sept. 21, 2019, 10 a.m. | 30.3 ppb (28) | 8.2 ppb (8) | 25.1 ppb (23) | 22.0 ppb (20) | 18.9 ppb (18) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | N/A | N/A | 28.0 | |
| Sept. 21, 2019, 9 a.m. | 31.1 ppb (29) | 7.0 ppb (6) | 23.2 ppb (21) | 24.0 ppb (22) | 18.3 ppb (17) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | N/A | N/A | 29.0 | |
| Sept. 21, 2019, 8 a.m. | 36.0 ppb (33) | 8.9 ppb (8) | 34.4 ppb (32) | 27.0 ppb (25) | 24.9 ppb (23) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | N/A | N/A | 33.0 | |
| Sept. 21, 2019, 7 a.m. | 33.1 ppb (31) | 4.2 ppb (4) | 27.6 ppb (26) | 29.0 ppb (27) | 25.0 ppb (23) | 0.0 ppb (0) | 5.0 ppb (4) | N/A | N/A | N/A | 31.0 | |
| Sept. 21, 2019, 6 a.m. | 24.6 ppb (23) | 2.3 ppb (2) | 21.4 ppb (20) | 22.0 ppb (20) | 19.8 ppb (18) | 1.0 ppb (1) | 15.0 ppb (12) | N/A | N/A | N/A | 23.0 | |
| Sept. 21, 2019, 5 a.m. | 20.5 ppb (19) | 1.2 ppb (1) | 17.1 ppb (16) | 19.0 ppb (18) | 16.9 ppb (16) | 0.0 ppb (0) | 19.0 ppb (15) | N/A | N/A | N/A | 19.0 | |
| Sept. 21, 2019, 4 a.m. | 13.0 ppb (12) | 1.0 ppb (1) | 8.7 ppb (8) | 12.0 ppb (11) | 8.1 ppb (8) | 0.0 ppb (0) | 26.0 ppb (20) | N/A | N/A | N/A | 20.0 | |
| Sept. 21, 2019, 3 a.m. | 11.3 ppb (10) | 0.6 ppb (1) | 7.1 ppb (7) | 11.0 ppb (10) | 6.9 ppb (6) | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | N/A | 22.0 | |
| Sept. 21, 2019, 2 a.m. | 11.5 ppb (11) | 0.5 ppb (0) | 7.1 ppb (7) | 11.0 ppb (10) | 6.9 ppb (6) | 0.0 ppb (0) | 33.0 ppb (25) | N/A | N/A | N/A | 25.0 | |
| Sept. 21, 2019, 1 a.m. | 7.9 ppb (7) | 0.4 ppb (0) | 3.9 ppb (4) | 8.0 ppb (7) | 3.6 ppb (3) | 0.0 ppb (0) | 40.0 ppb (31) | N/A | N/A | N/A | 31.0 | |
| Sept. 21, 2019, midnight | 6.2 ppb (6) | 0.7 ppb (1) | 2.3 ppb (2) | 5.0 ppb (5) | 1.6 ppb (1) | 0.0 ppb (0) | 41.0 ppb (32) | N/A | N/A | N/A | 32.0 | |
| Sept. 20, 2019, 11 p.m. | 7.1 ppb (7) | 0.9 ppb (1) | 3.3 ppb (3) | 6.0 ppb (6) | 2.3 ppb (2) | 0.0 ppb (0) | 47.0 ppb (36) | N/A | N/A | N/A | 36.0 | |
| Sept. 20, 2019, 10 p.m. | 9.8 ppb (9) | 1.6 ppb (1) | 5.7 ppb (5) | 8.0 ppb (7) | 4.0 ppb (4) | 1.0 ppb (1) | 46.0 ppb (35) | N/A | N/A | N/A | 35.0 | |
| Sept. 20, 2019, 9 p.m. | 12.8 ppb (12) | 2.6 ppb (2) | 8.6 ppb (8) | 10.0 ppb (9) | 5.9 ppb (5) | 1.0 ppb (1) | 42.0 ppb (32) | N/A | N/A | N/A | 32.0 | |
| Sept. 20, 2019, 8 p.m. | 14.7 ppb (14) | 3.0 ppb (3) | 10.6 ppb (10) | 12.0 ppb (11) | 7.6 ppb (7) | 1.0 ppb (1) | 44.0 ppb (34) | N/A | N/A | N/A | 34.0 | |
| Sept. 20, 2019, 7 p.m. | 20.1 ppb (19) | 5.0 ppb (5) | 15.5 ppb (14) | 15.0 ppb (14) | 10.4 ppb (10) | 0.0 ppb (0) | 37.0 ppb (28) | N/A | N/A | N/A | 28.0 | |
| Sept. 20, 2019, 6 p.m. | 22.6 ppb (21) | 7.0 ppb (6) | 17.3 ppb (16) | 16.0 ppb (15) | 10.2 ppb (9) | 0.0 ppb (0) | 29.0 ppb (22) | N/A | N/A | N/A | 22.0 | |
| Sept. 20, 2019, 5 p.m. | 27.1 ppb (25) | 9.8 ppb (9) | 21.0 ppb (19) | 17.0 ppb (16) | 11.6 ppb (11) | 0.0 ppb (0) | 20.0 ppb (15) | N/A | N/A | N/A | 25.0 | |
| Sept. 20, 2019, 4 p.m. | 30.6 ppb (28) | 12.0 ppb (11) | 22.8 ppb (21) | 19.0 ppb (18) | 12.8 ppb (12) | 0.0 ppb (0) | 16.0 ppb (12) | N/A | N/A | N/A | 28.0 | |
| Sept. 19, 2019, 4 p.m. | 12.1 ppb (11) | 3.9 ppb (4) | 6.6 ppb (6) | 8.0 ppb (7) | 3.1 ppb (3) | 0.0 ppb (0) | 26.0 ppb (20) | N/A | 25.0 μg/m3 (23) | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 19, 2019, 3 p.m. | 16.8 ppb (16) | 5.4 ppb (5) | 11.5 ppb (11) | 11.0 ppb (10) | 6.0 ppb (6) | 0.0 ppb (0) | 21.0 ppb (16) | N/A | 23.0 μg/m3 (21) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 19, 2019, 2 p.m. | 29.3 ppb (27) | 10.3 ppb (10) | 20.5 ppb (19) | 19.0 ppb (18) | 11.4 ppb (11) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | 38.0 μg/m3 (35) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 19, 2019, 1 p.m. | 20.3 ppb (19) | 4.9 ppb (5) | 11.6 ppb (11) | 15.0 ppb (14) | 9.0 ppb (8) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | 27.0 μg/m3 (25) | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 19, 2019, noon | 20.1 ppb (19) | 3.9 ppb (4) | 14.2 ppb (13) | 16.0 ppb (15) | 11.8 ppb (11) | 0.0 ppb (0) | 10.0 ppb (8) | N/A | 22.0 μg/m3 (20) | 7.0 μg/m3 (29) | 29.0 | |
| Sept. 19, 2019, 11 a.m. | 17.2 ppb (16) | 1.9 ppb (2) | 9.2 ppb (9) | 15.0 ppb (14) | 8.1 ppb (8) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | 21.0 μg/m3 (19) | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 19, 2019, 10 a.m. | 25.4 ppb (24) | 5.0 ppb (5) | 17.1 ppb (16) | 20.0 ppb (19) | 13.4 ppb (12) | 0.0 ppb (0) | 8.0 ppb (6) | N/A | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 19, 2019, 9 a.m. | 26.2 ppb (24) | 4.5 ppb (4) | 15.3 ppb (14) | 22.0 ppb (20) | 13.7 ppb (13) | 0.0 ppb (0) | 7.0 ppb (5) | N/A | 30.0 μg/m3 (27) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 19, 2019, 8 a.m. | 25.1 ppb (23) | 3.3 ppb (3) | 18.9 ppb (18) | 22.0 ppb (20) | 18.4 ppb (17) | 0.0 ppb (0) | 10.0 ppb (8) | N/A | 30.0 μg/m3 (27) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 19, 2019, 7 a.m. | 25.2 ppb (23) | 2.1 ppb (2) | 21.1 ppb (20) | 23.0 ppb (21) | 20.0 ppb (19) | 0.0 ppb (0) | 13.0 ppb (10) | N/A | 38.0 μg/m3 (35) | N/A | 35.0 | |
| Sept. 19, 2019, 6 a.m. | 15.4 ppb (14) | 1.5 ppb (1) | 10.3 ppb (10) | 14.0 ppb (13) | 9.6 ppb (9) | 0.0 ppb (0) | 23.0 ppb (18) | N/A | 25.0 μg/m3 (23) | 38.0 μg/m3 (106) | 106.0 | |
| Sept. 19, 2019, 5 a.m. | 13.9 ppb (13) | 0.8 ppb (1) | 8.8 ppb (8) | 13.0 ppb (12) | 8.7 ppb (8) | 0.0 ppb (0) | 25.0 ppb (19) | N/A | 25.0 μg/m3 (23) | N/A | 23.0 | |
| Sept. 19, 2019, 4 a.m. | 12.5 ppb (12) | 0.8 ppb (1) | 7.6 ppb (7) | 12.0 ppb (11) | 7.4 ppb (7) | 0.0 ppb (0) | 26.0 ppb (20) | N/A | 24.0 μg/m3 (22) | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 19, 2019, 3 a.m. | 11.5 ppb (11) | 0.5 ppb (0) | 6.6 ppb (6) | 11.0 ppb (10) | 6.5 ppb (6) | 0.0 ppb (0) | 29.0 ppb (22) | N/A | 24.0 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 19, 2019, 2 a.m. | 11.5 ppb (11) | 0.4 ppb (0) | 6.5 ppb (6) | 11.0 ppb (10) | 6.3 ppb (6) | 0.0 ppb (0) | 28.0 ppb (22) | N/A | 18.0 μg/m3 (16) | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 19, 2019, 1 a.m. | 8.1 ppb (8) | 0.6 ppb (1) | 3.8 ppb (4) | 8.0 ppb (7) | 3.1 ppb (3) | 0.0 ppb (0) | 33.0 ppb (25) | N/A | 19.0 μg/m3 (17) | 5.0 μg/m3 (21) | 25.0 | |
| Sept. 19, 2019, midnight | 7.7 ppb (7) | 0.9 ppb (1) | 3.6 ppb (3) | 7.0 ppb (6) | 2.7 ppb (3) | 0.0 ppb (0) | 39.0 ppb (30) | N/A | 24.0 μg/m3 (22) | 7.0 μg/m3 (29) | 30.0 | |
| Sept. 18, 2019, 11 p.m. | N/A | N/A | 4.6 ppb (4) | N/A | 3.2 ppb (3) | 0.0 ppb (0) | N/A | N/A | N/A | N/A | 4.0 | |
| Sept. 18, 2019, 10 p.m. | N/A | N/A | 8.0 ppb (7) | N/A | 5.6 ppb (5) | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 7.0 | |
| Sept. 18, 2019, 9 p.m. | 13.2 ppb (12) | 2.7 ppb (3) | 9.3 ppb (9) | 11.0 ppb (10) | 6.6 ppb (6) | 1.0 ppb (1) | 41.0 ppb (32) | N/A | 36.0 μg/m3 (33) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 18, 2019, 8 p.m. | 13.9 ppb (13) | 2.8 ppb (3) | 10.2 ppb (9) | 11.0 ppb (10) | 7.3 ppb (7) | 1.0 ppb (1) | 42.0 ppb (32) | N/A | 35.0 μg/m3 (32) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 18, 2019, 7 p.m. | N/A | N/A | 10.7 ppb (10) | N/A | 7.5 ppb (7) | 1.0 ppb (1) | N/A | N/A | N/A | N/A | 10.0 | |
| Sept. 18, 2019, 6 p.m. | 23.9 ppb (22) | 6.7 ppb (6) | 17.9 ppb (17) | 17.0 ppb (16) | 10.9 ppb (10) | 1.0 ppb (1) | 32.0 ppb (25) | N/A | 39.0 μg/m3 (35) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 18, 2019, 5 p.m. | 27.9 ppb (26) | 9.3 ppb (9) | N/A | 19.0 ppb (18) | N/A | 1.0 ppb (1) | 27.0 ppb (21) | N/A | 38.0 μg/m3 (35) | N/A | 35.0 | |
| Sept. 18, 2019, 4 p.m. | 20.6 ppb (19) | 6.8 ppb (6) | 14.7 ppb (14) | 14.0 ppb (13) | 8.4 ppb (8) | 1.0 ppb (1) | 26.0 ppb (20) | N/A | N/A | N/A | 20.0 | |
| Sept. 18, 2019, 3 p.m. | 26.9 ppb (25) | 9.1 ppb (8) | 19.4 ppb (18) | 18.0 ppb (17) | 11.9 ppb (11) | 1.0 ppb (1) | 17.0 ppb (13) | N/A | 35.0 μg/m3 (32) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 18, 2019, 2 p.m. | 71.0 ppb (68) | 44.9 ppb (42) | 56.6 ppb (53) | 26.0 ppb (24) | 16.3 ppb (15) | 1.0 ppb (1) | 4.0 ppb (3) | N/A | 46.0 μg/m3 (42) | 16.0 μg/m3 (59) | 68.0 | |
| Sept. 18, 2019, 1 p.m. | 68.7 ppb (66) | 42.0 ppb (39) | 57.8 ppb (54) | 27.0 ppb (25) | 12.9 ppb (12) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 39.0 μg/m3 (35) | 15.0 μg/m3 (56) | 66.0 | |
| Sept. 18, 2019, noon | 41.8 ppb (39) | 16.7 ppb (15) | 31.8 ppb (29) | 25.0 ppb (23) | 19.8 ppb (18) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 30.0 μg/m3 (27) | 9.0 μg/m3 (38) | 39.0 | |
| Sept. 18, 2019, 11 a.m. | 39.4 ppb (36) | 13.7 ppb (13) | 30.2 ppb (28) | 26.0 ppb (24) | 18.4 ppb (17) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 27.0 μg/m3 (25) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 18, 2019, 10 a.m. | 33.7 ppb (31) | 6.8 ppb (6) | 28.8 ppb (27) | 27.0 ppb (25) | 23.6 ppb (22) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | 34.0 μg/m3 (31) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 18, 2019, 9 a.m. | 31.3 ppb (29) | 4.0 ppb (4) | 24.4 ppb (23) | 27.0 ppb (25) | 21.5 ppb (20) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 28.0 μg/m3 (25) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 18, 2019, 8 a.m. | 46.8 ppb (43) | 13.0 ppb (12) | 43.4 ppb (40) | 34.0 ppb (31) | 30.1 ppb (28) | 1.0 ppb (1) | 2.0 ppb (2) | N/A | 35.0 μg/m3 (32) | 9.0 μg/m3 (38) | 43.0 | |
| Sept. 18, 2019, 7 a.m. | 36.7 ppb (34) | 2.4 ppb (2) | 33.5 ppb (31) | 34.0 ppb (31) | 30.2 ppb (28) | 1.0 ppb (1) | 7.0 ppb (5) | N/A | 36.0 μg/m3 (33) | 8.0 μg/m3 (33) | 34.0 | |
| Sept. 18, 2019, 6 a.m. | 25.4 ppb (24) | 1.4 ppb (1) | 20.2 ppb (19) | 24.0 ppb (22) | 19.7 ppb (18) | 1.0 ppb (1) | 17.0 ppb (13) | N/A | 31.0 μg/m3 (28) | 9.0 μg/m3 (38) | 38.0 | |
| Sept. 18, 2019, 5 a.m. | 22.2 ppb (21) | 1.8 ppb (2) | 18.1 ppb (17) | 20.0 ppb (19) | 16.7 ppb (15) | 0.0 ppb (0) | 19.0 ppb (15) | N/A | 30.0 μg/m3 (27) | 8.0 μg/m3 (33) | 33.0 | |
| Sept. 18, 2019, 4 a.m. | 13.2 ppb (12) | 0.7 ppb (1) | 9.2 ppb (9) | 13.0 ppb (12) | 9.2 ppb (9) | 0.0 ppb (0) | 28.0 ppb (22) | N/A | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, 3 a.m. | 11.9 ppb (11) | 1.0 ppb (1) | 7.2 ppb (7) | 11.0 ppb (10) | 6.6 ppb (6) | 0.0 ppb (0) | 28.0 ppb (22) | N/A | 24.0 μg/m3 (22) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 18, 2019, 2 a.m. | 12.0 ppb (11) | 1.5 ppb (1) | 7.4 ppb (7) | 11.0 ppb (10) | 6.1 ppb (6) | 0.0 ppb (0) | 29.0 ppb (22) | N/A | 24.0 μg/m3 (22) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 18, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 26.0 μg/m3 (24) | 33.0 μg/m3 (95) | 95.0 | |
| Sept. 18, 2019, midnight | 9.4 ppb (9) | 0.7 ppb (1) | 6.1 ppb (6) | 9.0 ppb (8) | 5.3 ppb (5) | 1.0 ppb (1) | 51.0 ppb (39) | N/A | 30.0 μg/m3 (27) | N/A | 39.0 | |
| Sept. 17, 2019, 11 p.m. | 10.2 ppb (9) | 1.5 ppb (1) | 6.8 ppb (6) | 9.0 ppb (8) | 5.3 ppb (5) | 1.0 ppb (1) | 46.0 ppb (35) | N/A | 27.0 μg/m3 (25) | 37.0 μg/m3 (104) | 104.0 | |
| Sept. 17, 2019, 10 p.m. | 11.5 ppb (11) | 1.9 ppb (2) | 8.4 ppb (8) | 10.0 ppb (9) | 6.4 ppb (6) | 1.0 ppb (1) | 45.0 ppb (35) | N/A | 23.0 μg/m3 (21) | N/A | 35.0 | |
| Sept. 17, 2019, 9 p.m. | 14.9 ppb (14) | 2.7 ppb (3) | 12.2 ppb (11) | 12.0 ppb (11) | 9.3 ppb (9) | 1.0 ppb (1) | 44.0 ppb (34) | N/A | 37.0 μg/m3 (34) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 8 p.m. | 19.4 ppb (18) | 3.6 ppb (3) | 16.2 ppb (15) | 16.0 ppb (15) | 12.4 ppb (11) | 1.0 ppb (1) | 45.0 ppb (35) | N/A | 38.0 μg/m3 (35) | 41.0 μg/m3 (114) | 114.0 | |
| Sept. 17, 2019, 7 p.m. | 20.3 ppb (19) | 4.4 ppb (4) | 17.2 ppb (16) | 16.0 ppb (15) | 12.5 ppb (12) | 1.0 ppb (1) | 42.0 ppb (32) | N/A | 35.0 μg/m3 (32) | 12.0 μg/m3 (50) | 50.0 | |
| Sept. 17, 2019, 6 p.m. | 28.4 ppb (26) | 8.0 ppb (7) | 24.4 ppb (23) | 20.0 ppb (19) | 16.1 ppb (15) | 1.0 ppb (1) | 32.0 ppb (25) | N/A | 41.0 μg/m3 (37) | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 17, 2019, 5 p.m. | 29.4 ppb (27) | 9.4 ppb (9) | 25.8 ppb (24) | 20.0 ppb (19) | 16.0 ppb (15) | 1.0 ppb (1) | 26.0 ppb (20) | N/A | 38.0 μg/m3 (35) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 17, 2019, 4 p.m. | 26.0 ppb (24) | 9.0 ppb (8) | 22.0 ppb (20) | 17.0 ppb (16) | 13.1 ppb (12) | 1.0 ppb (1) | 21.0 ppb (16) | N/A | 37.0 μg/m3 (34) | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 17, 2019, 3 p.m. | 28.4 ppb (26) | 12.6 ppb (12) | 24.6 ppb (23) | 16.0 ppb (15) | 13.2 ppb (12) | 0.0 ppb (0) | 15.0 ppb (12) | N/A | 33.0 μg/m3 (30) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 17, 2019, 2 p.m. | 50.8 ppb (47) | 29.8 ppb (28) | 39.5 ppb (37) | 21.0 ppb (19) | 13.7 ppb (13) | 0.0 ppb (0) | 6.0 ppb (5) | N/A | 38.0 μg/m3 (35) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 17, 2019, 1 p.m. | 51.1 ppb (47) | 26.5 ppb (25) | 37.4 ppb (35) | 25.0 ppb (23) | 14.8 ppb (14) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 31.0 μg/m3 (28) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 17, 2019, noon | 40.3 ppb (37) | 17.6 ppb (16) | 28.4 ppb (26) | 23.0 ppb (21) | 18.6 ppb (17) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 28.0 μg/m3 (25) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 17, 2019, 11 a.m. | 36.2 ppb (34) | 12.6 ppb (12) | 24.3 ppb (23) | 24.0 ppb (22) | 16.0 ppb (15) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | 27.0 μg/m3 (25) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 17, 2019, 10 a.m. | 31.2 ppb (29) | 8.9 ppb (8) | 22.3 ppb (21) | 22.0 ppb (20) | 18.1 ppb (17) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | 22.0 μg/m3 (20) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 9 a.m. | 25.3 ppb (23) | 2.9 ppb (3) | 18.1 ppb (17) | 22.0 ppb (20) | 16.6 ppb (15) | 0.0 ppb (0) | 8.0 ppb (6) | N/A | 48.0 μg/m3 (44) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 17, 2019, 8 a.m. | 27.6 ppb (26) | 2.6 ppb (2) | 24.7 ppb (23) | 25.0 ppb (23) | 23.7 ppb (22) | 0.0 ppb (0) | 9.0 ppb (7) | N/A | 33.0 μg/m3 (30) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 17, 2019, 7 a.m. | 26.6 ppb (25) | 2.0 ppb (2) | 22.5 ppb (21) | 25.0 ppb (23) | 22.1 ppb (20) | 0.0 ppb (0) | 11.0 ppb (8) | N/A | 41.0 μg/m3 (37) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 17, 2019, 6 a.m. | 24.6 ppb (23) | 2.5 ppb (2) | 19.3 ppb (18) | 22.0 ppb (20) | 18.2 ppb (17) | 1.0 ppb (1) | 14.0 ppb (11) | N/A | 40.0 μg/m3 (36) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 17, 2019, 5 a.m. | 13.0 ppb (12) | 1.0 ppb (1) | 10.8 ppb (10) | 12.0 ppb (11) | 10.0 ppb (9) | 0.0 ppb (0) | 21.0 ppb (16) | N/A | 22.0 μg/m3 (20) | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 17, 2019, 4 a.m. | 10.2 ppb (9) | 1.1 ppb (1) | 6.7 ppb (6) | 9.0 ppb (8) | 5.8 ppb (5) | 0.0 ppb (0) | 24.0 ppb (18) | N/A | 19.0 μg/m3 (17) | 6.0 μg/m3 (25) | 25.0 | |
| Sept. 17, 2019, 3 a.m. | 8.7 ppb (8) | 0.6 ppb (1) | 5.2 ppb (5) | 8.0 ppb (7) | 4.9 ppb (5) | 0.0 ppb (0) | 31.0 ppb (24) | N/A | 21.0 μg/m3 (19) | 11.0 μg/m3 (46) | 46.0 | |
| Sept. 17, 2019, 2 a.m. | 7.4 ppb (7) | 0.8 ppb (1) | 3.7 ppb (3) | 7.0 ppb (6) | 3.3 ppb (3) | 0.0 ppb (0) | 36.0 ppb (28) | N/A | 25.0 μg/m3 (23) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 17, 2019, 1 a.m. | 10.5 ppb (10) | 1.3 ppb (1) | 6.4 ppb (6) | 9.0 ppb (8) | 5.4 ppb (5) | 0.0 ppb (0) | 38.0 ppb (29) | N/A | 27.0 μg/m3 (25) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 17, 2019, midnight | 11.7 ppb (11) | 1.5 ppb (1) | 8.6 ppb (8) | 10.0 ppb (9) | 7.1 ppb (7) | 0.0 ppb (0) | 44.0 ppb (34) | N/A | 28.0 μg/m3 (25) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 16, 2019, 11 p.m. | 11.1 ppb (10) | 1.3 ppb (1) | 8.5 ppb (8) | 10.0 ppb (9) | 7.0 ppb (6) | 0.0 ppb (0) | 52.0 ppb (40) | N/A | 30.0 μg/m3 (27) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 16, 2019, 10 p.m. | 13.2 ppb (12) | 1.7 ppb (2) | 11.0 ppb (10) | 12.0 ppb (11) | 9.2 ppb (9) | 1.0 ppb (1) | 55.0 ppb (42) | N/A | 38.0 μg/m3 (35) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 16, 2019, 9 p.m. | 16.9 ppb (16) | 2.5 ppb (2) | 14.5 ppb (13) | 14.0 ppb (13) | 11.9 ppb (11) | 1.0 ppb (1) | 54.0 ppb (42) | N/A | 43.0 μg/m3 (39) | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 16, 2019, 8 p.m. | 21.7 ppb (20) | 5.1 ppb (5) | 18.5 ppb (17) | 17.0 ppb (16) | 13.3 ppb (12) | 1.0 ppb (1) | 39.0 ppb (30) | N/A | 36.0 μg/m3 (33) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 16, 2019, 7 p.m. | 24.1 ppb (22) | 5.9 ppb (5) | 21.7 ppb (20) | 18.0 ppb (17) | 15.5 ppb (14) | 1.0 ppb (1) | 39.0 ppb (30) | N/A | 43.0 μg/m3 (39) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 16, 2019, 6 p.m. | 28.0 ppb (26) | 8.1 ppb (8) | 25.5 ppb (24) | 20.0 ppb (19) | 17.1 ppb (16) | 1.0 ppb (1) | 32.0 ppb (25) | N/A | 43.0 μg/m3 (39) | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 16, 2019, 5 p.m. | 42.0 ppb (39) | 15.8 ppb (15) | 38.9 ppb (36) | 26.0 ppb (24) | 22.4 ppb (21) | 1.0 ppb (1) | 20.0 ppb (15) | N/A | 47.0 μg/m3 (43) | 24.0 μg/m3 (76) | 76.0 | |
| Sept. 16, 2019, 4 p.m. | 48.2 ppb (45) | 19.6 ppb (18) | 44.1 ppb (41) | 29.0 ppb (27) | 24.8 ppb (23) | 1.0 ppb (1) | 11.0 ppb (8) | N/A | 44.0 μg/m3 (40) | 26.0 μg/m3 (80) | 80.0 | |
| Sept. 16, 2019, 3 p.m. | 48.3 ppb (45) | 22.0 ppb (20) | 42.7 ppb (40) | 26.0 ppb (24) | 21.7 ppb (20) | 0.0 ppb (0) | 7.0 ppb (5) | N/A | 48.0 μg/m3 (44) | 23.0 μg/m3 (73) | 73.0 | |
| Sept. 16, 2019, 2 p.m. | 42.7 ppb (40) | 17.2 ppb (16) | 36.2 ppb (34) | 26.0 ppb (24) | 21.3 ppb (20) | 0.0 ppb (0) | 5.0 ppb (4) | N/A | 48.0 μg/m3 (44) | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 16, 2019, 1 p.m. | 39.1 ppb (36) | 12.1 ppb (11) | 29.9 ppb (28) | 27.0 ppb (25) | 19.5 ppb (18) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 48.0 μg/m3 (44) | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 16, 2019, noon | 35.5 ppb (33) | 7.3 ppb (7) | 26.9 ppb (25) | 28.0 ppb (26) | 23.8 ppb (22) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | 36.0 μg/m3 (33) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 16, 2019, 11 a.m. | 33.4 ppb (31) | 9.2 ppb (9) | 23.1 ppb (21) | 24.0 ppb (22) | 18.8 ppb (17) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 36.0 μg/m3 (33) | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 16, 2019, 10 a.m. | 39.1 ppb (36) | 14.0 ppb (13) | 27.9 ppb (26) | 25.0 ppb (23) | 22.3 ppb (21) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 31.0 μg/m3 (28) | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 16, 2019, 9 a.m. | 12.9 ppb (12) | 1.8 ppb (2) | 11.2 ppb (10) | 11.0 ppb (10) | 10.7 ppb (10) | 0.0 ppb (0) | 17.0 ppb (13) | N/A | 30.0 μg/m3 (27) | 19.0 μg/m3 (65) | 65.0 | |
| Sept. 16, 2019, 8 a.m. | 16.6 ppb (15) | 1.9 ppb (2) | 15.8 ppb (15) | 15.0 ppb (14) | 15.7 ppb (15) | 0.0 ppb (0) | 17.0 ppb (13) | N/A | 38.0 μg/m3 (35) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 16, 2019, 7 a.m. | 15.3 ppb (14) | 1.6 ppb (1) | 12.6 ppb (12) | 14.0 ppb (13) | 12.5 ppb (12) | 0.0 ppb (0) | 17.0 ppb (13) | N/A | 31.0 μg/m3 (28) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 16, 2019, 6 a.m. | 16.7 ppb (15) | 1.5 ppb (1) | 15.8 ppb (15) | 15.0 ppb (14) | 14.8 ppb (14) | 0.0 ppb (0) | 20.0 ppb (15) | N/A | 33.0 μg/m3 (30) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 16, 2019, 5 a.m. | 14.7 ppb (14) | 1.3 ppb (1) | 11.8 ppb (11) | 13.0 ppb (12) | 11.7 ppb (11) | 0.0 ppb (0) | 18.0 ppb (14) | N/A | 33.0 μg/m3 (30) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 16, 2019, 4 a.m. | 15.2 ppb (14) | 1.2 ppb (1) | 11.6 ppb (11) | 14.0 ppb (13) | 11.3 ppb (10) | 0.0 ppb (0) | 20.0 ppb (15) | N/A | 34.0 μg/m3 (31) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 16, 2019, 3 a.m. | 13.8 ppb (13) | 1.0 ppb (1) | 10.1 ppb (9) | 13.0 ppb (12) | 9.9 ppb (9) | 0.0 ppb (0) | 24.0 ppb (18) | N/A | 35.0 μg/m3 (32) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 16, 2019, 2 a.m. | 12.0 ppb (11) | 0.8 ppb (1) | 7.8 ppb (7) | 11.0 ppb (10) | 7.8 ppb (7) | 0.0 ppb (0) | 31.0 ppb (24) | N/A | 38.0 μg/m3 (35) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 16, 2019, 1 a.m. | 10.8 ppb (10) | 0.6 ppb (1) | 6.7 ppb (6) | 10.0 ppb (9) | 6.4 ppb (6) | 0.0 ppb (0) | 38.0 ppb (29) | N/A | 42.0 μg/m3 (38) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 16, 2019, midnight | 9.5 ppb (9) | 0.8 ppb (1) | 4.6 ppb (4) | 9.0 ppb (8) | 3.8 ppb (4) | 1.0 ppb (1) | 44.0 ppb (34) | N/A | 34.0 μg/m3 (31) | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 15, 2019, 11 p.m. | 7.6 ppb (7) | 1.0 ppb (1) | N/A | 7.0 ppb (6) | N/A | 1.0 ppb (1) | 47.0 ppb (36) | N/A | 33.0 μg/m3 (30) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 15, 2019, 10 p.m. | 10.1 ppb (9) | 1.0 ppb (1) | 8.8 ppb (8) | 9.0 ppb (8) | 7.8 ppb (7) | 1.0 ppb (1) | 51.0 ppb (39) | N/A | 39.0 μg/m3 (35) | 24.0 μg/m3 (76) | 76.0 | |
| Sept. 15, 2019, 9 p.m. | 24.8 ppb (23) | 3.0 ppb (3) | 22.5 ppb (21) | 22.0 ppb (20) | 19.2 ppb (18) | 1.0 ppb (1) | 55.0 ppb (42) | N/A | 44.0 μg/m3 (40) | 55.0 μg/m3 (149) | 149.0 | |
| Sept. 15, 2019, 8 p.m. | 18.1 ppb (17) | 2.0 ppb (2) | 16.0 ppb (15) | 16.0 ppb (15) | 13.7 ppb (13) | 1.0 ppb (1) | 67.0 ppb (52) | N/A | 40.0 μg/m3 (36) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 15, 2019, 7 p.m. | 18.3 ppb (17) | 2.5 ppb (2) | 16.1 ppb (15) | 16.0 ppb (15) | 13.6 ppb (13) | 1.0 ppb (1) | 57.0 ppb (44) | N/A | 34.0 μg/m3 (31) | 20.0 μg/m3 (67) | 67.0 | |
| Sept. 15, 2019, 6 p.m. | 28.1 ppb (26) | 5.8 ppb (5) | 26.0 ppb (24) | 22.0 ppb (20) | 20.0 ppb (19) | 1.0 ppb (1) | 45.0 ppb (35) | N/A | 48.0 μg/m3 (44) | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 15, 2019, 5 p.m. | 44.3 ppb (41) | 14.3 ppb (13) | 40.5 ppb (38) | 30.0 ppb (28) | 26.2 ppb (24) | 1.0 ppb (1) | 23.0 ppb (18) | N/A | 61.0 μg/m3 (53) | 27.0 μg/m3 (82) | 82.0 | |
| Sept. 15, 2019, 4 p.m. | 44.9 ppb (42) | 15.6 ppb (14) | 40.2 ppb (37) | 29.0 ppb (27) | 25.3 ppb (23) | 1.0 ppb (1) | 13.0 ppb (10) | N/A | 53.0 μg/m3 (48) | 26.0 μg/m3 (80) | 80.0 | |
| Sept. 15, 2019, 3 p.m. | 53.3 ppb (49) | 23.0 ppb (21) | 47.2 ppb (44) | 30.0 ppb (28) | 25.0 ppb (23) | 1.0 ppb (1) | 7.0 ppb (5) | N/A | 43.0 μg/m3 (39) | 22.0 μg/m3 (71) | 71.0 | |
| Sept. 15, 2019, 2 p.m. | 47.2 ppb (44) | 21.4 ppb (20) | 39.8 ppb (37) | 26.0 ppb (24) | 21.3 ppb (20) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 52.0 μg/m3 (47) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 15, 2019, 1 p.m. | 32.8 ppb (30) | 7.6 ppb (7) | 25.6 ppb (24) | 25.0 ppb (23) | 20.5 ppb (19) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 30.0 μg/m3 (27) | 16.0 μg/m3 (59) | 59.0 | |
| Sept. 15, 2019, noon | 36.8 ppb (34) | 8.8 ppb (8) | 30.3 ppb (28) | 28.0 ppb (26) | 24.6 ppb (23) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 32.0 μg/m3 (29) | 10.0 μg/m3 (42) | 42.0 | |
| Sept. 15, 2019, 11 a.m. | 30.6 ppb (28) | 4.9 ppb (5) | 23.1 ppb (21) | 26.0 ppb (24) | 20.5 ppb (19) | 0.0 ppb (0) | 5.0 ppb (4) | N/A | 30.0 μg/m3 (27) | 39.0 μg/m3 (109) | 109.0 | |
| Sept. 15, 2019, 10 a.m. | 42.1 ppb (39) | 12.0 ppb (11) | 37.1 ppb (34) | 30.0 ppb (28) | 25.9 ppb (24) | 0.0 ppb (0) | 2.0 ppb (2) | N/A | 33.0 μg/m3 (30) | 4.0 μg/m3 (17) | 39.0 | |
| Sept. 15, 2019, 9 a.m. | 34.5 ppb (32) | 5.6 ppb (5) | 26.5 ppb (25) | 29.0 ppb (27) | 23.8 ppb (22) | 0.0 ppb (0) | 4.0 ppb (3) | N/A | 34.0 μg/m3 (31) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 15, 2019, 8 a.m. | 33.1 ppb (31) | 6.0 ppb (6) | 27.9 ppb (26) | 27.0 ppb (25) | 25.0 ppb (23) | 0.0 ppb (0) | 3.0 ppb (2) | N/A | 48.0 μg/m3 (44) | 18.0 μg/m3 (63) | 63.0 | |
| Sept. 15, 2019, 7 a.m. | 31.0 ppb (29) | 7.0 ppb (6) | 26.1 ppb (24) | 24.0 ppb (22) | 22.2 ppb (21) | 0.0 ppb (0) | 5.0 ppb (4) | N/A | 51.0 μg/m3 (46) | 17.0 μg/m3 (61) | 61.0 | |
| Sept. 15, 2019, 6 a.m. | 26.0 ppb (24) | 2.9 ppb (3) | 20.2 ppb (19) | 23.0 ppb (21) | 19.3 ppb (18) | 0.0 ppb (0) | 10.0 ppb (8) | N/A | 45.0 μg/m3 (41) | 15.0 μg/m3 (56) | 56.0 | |
| Sept. 15, 2019, 5 a.m. | 16.7 ppb (15) | 2.5 ppb (2) | 13.4 ppb (12) | 14.0 ppb (13) | 11.7 ppb (11) | 0.0 ppb (0) | 18.0 ppb (14) | N/A | 66.0 μg/m3 (56) | 12.0 μg/m3 (50) | 56.0 | |
| Sept. 15, 2019, 4 a.m. | 14.4 ppb (13) | 0.9 ppb (1) | 10.3 ppb (10) | 13.0 ppb (12) | 10.3 ppb (10) | 0.0 ppb (0) | 24.0 ppb (18) | N/A | 28.0 μg/m3 (25) | 13.0 μg/m3 (52) | 52.0 | |
| Sept. 15, 2019, 3 a.m. | 13.1 ppb (12) | 0.6 ppb (1) | 9.5 ppb (9) | 13.0 ppb (12) | 9.5 ppb (9) | 1.0 ppb (1) | 42.0 ppb (32) | N/A | 36.0 μg/m3 (33) | 14.0 μg/m3 (54) | 54.0 | |
| Sept. 15, 2019, 2 a.m. | 8.7 ppb (8) | 0.3 ppb (0) | 5.9 ppb (5) | 8.0 ppb (7) | 5.9 ppb (5) | 1.0 ppb (1) | 59.0 ppb (45) | N/A | 33.0 μg/m3 (30) | 10.0 μg/m3 (42) | 45.0 | |
| Sept. 15, 2019, 1 a.m. | 7.9 ppb (7) | 0.2 ppb (0) | 5.0 ppb (5) | 8.0 ppb (7) | 4.8 ppb (4) | 1.0 ppb (1) | 61.0 ppb (47) | N/A | 27.0 μg/m3 (25) | 10.0 μg/m3 (42) | 47.0 | |
| Sept. 15, 2019, midnight | 7.1 ppb (7) | 0.3 ppb (0) | 4.8 ppb (4) | 7.0 ppb (6) | 4.4 ppb (4) | 1.0 ppb (1) | 71.0 ppb (55) | N/A | 32.0 μg/m3 (29) | 9.0 μg/m3 (38) | 55.0 | |
| Sept. 14, 2019, 11 p.m. | 7.2 ppb (7) | 0.4 ppb (0) | 5.5 ppb (5) | 7.0 ppb (6) | 5.0 ppb (5) | 1.0 ppb (1) | 79.0 ppb (62) | N/A | 29.0 μg/m3 (26) | 6.0 μg/m3 (25) | 62.0 | |
| Sept. 14, 2019, 10 p.m. | 11.2 ppb (10) | 0.7 ppb (1) | 9.6 ppb (9) | 10.0 ppb (9) | 8.8 ppb (8) | 1.0 ppb (1) | 86.0 ppb (68) | N/A | 37.0 μg/m3 (34) | 17.0 μg/m3 (61) | 68.0 | |
| Sept. 14, 2019, 9 p.m. | 14.4 ppb (13) | 1.2 ppb (1) | 12.4 ppb (11) | 13.0 ppb (12) | 11.3 ppb (10) | 1.0 ppb (1) | 79.0 ppb (62) | N/A | 43.0 μg/m3 (39) | 21.0 μg/m3 (69) | 69.0 | |
| Sept. 14, 2019, 8 p.m. | 20.4 ppb (19) | 1.9 ppb (2) | 18.6 ppb (17) | 19.0 ppb (18) | 16.7 ppb (15) | 1.0 ppb (1) | 77.0 ppb (60) | N/A | 52.0 μg/m3 (47) | 21.0 μg/m3 (69) | 69.0 |