Portland OR, US: 45.496641, -122.602877
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 19, 2019, 2 p.m. | 5.9 ppb (5) | 1.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 1.9 μg/m3 (8) | 21.0 | |
| May 19, 2019, 1 p.m. | 4.4 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.1 ppb (1) | N/A | 1.7 μg/m3 (7) | 19.0 | |
| May 19, 2019, noon | 3.3 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 1.5 μg/m3 (6) | 22.0 | |
| May 19, 2019, 11 a.m. | 3.4 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 1.4 μg/m3 (6) | 23.0 | |
| May 19, 2019, 10 a.m. | 3.0 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.1 ppb (1) | N/A | 1.6 μg/m3 (7) | 24.0 | |
| May 19, 2019, 9 a.m. | 3.0 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 1.5 μg/m3 (6) | 23.0 | |
| May 19, 2019, 8 a.m. | 6.2 ppb (6) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 2.1 μg/m3 (9) | 21.0 | |
| May 19, 2019, 7 a.m. | 6.9 ppb (6) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 23.0 ppb (18) | 0.1 ppb (1) | N/A | 2.9 μg/m3 (12) | 18.0 | |
| May 19, 2019, 6 a.m. | 10.6 ppb (10) | 1.2 ppb (1) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 18.0 ppb (14) | 0.1 ppb (1) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 19, 2019, 5 a.m. | 14.2 ppb (13) | 1.2 ppb (1) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | 16.0 ppb (12) | 0.2 ppb (2) | N/A | 5.3 μg/m3 (22) | 22.0 | |
| May 19, 2019, 4 a.m. | 12.3 ppb (11) | 1.1 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.2 ppb (2) | N/A | 4.7 μg/m3 (20) | 20.0 | |
| May 19, 2019, 3 a.m. | 8.0 ppb (7) | 1.1 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.2 ppb (2) | N/A | 3.3 μg/m3 (14) | 17.0 | |
| May 19, 2019, 2 a.m. | 5.0 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 2.7 μg/m3 (11) | 23.0 | |
| May 19, 2019, 1 a.m. | 3.9 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | 2.5 μg/m3 (10) | 28.0 | |
| May 19, 2019, midnight | 4.6 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | 2.0 μg/m3 (8) | 30.0 | |
| May 18, 2019, 11 p.m. | 4.3 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | 1.9 μg/m3 (8) | 29.0 | |
| May 18, 2019, 10 p.m. | 4.0 ppb (4) | 1.3 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.1 ppb (1) | N/A | 2.0 μg/m3 (8) | 28.0 | |
| May 18, 2019, 9 p.m. | 3.6 ppb (3) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | 1.8 μg/m3 (8) | 28.0 | |
| May 18, 2019, 8 p.m. | 3.5 ppb (3) | 1.6 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.1 ppb (1) | N/A | 1.9 μg/m3 (8) | 26.0 | |
| May 18, 2019, 7 p.m. | 4.3 ppb (4) | 1.7 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.1 ppb (1) | N/A | 2.3 μg/m3 (10) | 24.0 | |
| May 18, 2019, 6 p.m. | 5.1 ppb (5) | 2.0 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.1 ppb (1) | N/A | 2.8 μg/m3 (12) | 24.0 | |
| May 18, 2019, 5 p.m. | 5.4 ppb (5) | 2.0 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 2.6 μg/m3 (11) | 21.0 | |
| May 18, 2019, 4 p.m. | 6.1 ppb (6) | 2.2 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.1 ppb (1) | N/A | 1.9 μg/m3 (8) | 19.0 | |
| May 18, 2019, 3 p.m. | 6.6 ppb (6) | 1.9 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 20.0 ppb (15) | 0.1 ppb (1) | N/A | 2.0 μg/m3 (8) | 15.0 | |
| May 18, 2019, 2 p.m. | 7.1 ppb (7) | 1.7 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.1 ppb (1) | N/A | 2.2 μg/m3 (9) | 15.0 | |
| May 18, 2019, 1 p.m. | 5.7 ppb (5) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 20.0 ppb (15) | 0.1 ppb (1) | N/A | 2.3 μg/m3 (10) | 15.0 | |
| May 18, 2019, noon | 4.7 ppb (4) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 18.0 ppb (14) | 0.1 ppb (1) | N/A | 2.6 μg/m3 (11) | 14.0 | |
| May 18, 2019, 11 a.m. | 5.3 ppb (5) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 3.2 μg/m3 (13) | 13.0 | |
| May 18, 2019, 10 a.m. | 8.5 ppb (8) | 1.4 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 4.8 μg/m3 (20) | 20.0 | |
| May 18, 2019, 9 a.m. | 9.1 ppb (8) | 1.0 ppb (1) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 14.0 ppb (11) | 0.2 ppb (2) | N/A | 5.7 μg/m3 (24) | 24.0 | |
| May 18, 2019, 8 a.m. | 10.7 ppb (10) | 1.6 ppb (1) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 13.0 ppb (10) | 0.2 ppb (2) | N/A | 5.9 μg/m3 (25) | 25.0 | |
| May 18, 2019, 7 a.m. | 8.2 ppb (8) | 1.2 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 16.0 ppb (12) | 0.2 ppb (2) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| May 18, 2019, 6 a.m. | 8.8 ppb (8) | 1.0 ppb (1) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 18.0 ppb (14) | 0.1 ppb (1) | N/A | 4.6 μg/m3 (19) | 19.0 | |
| May 18, 2019, 5 a.m. | 6.2 ppb (6) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 3.8 μg/m3 (16) | 21.0 | |
| May 18, 2019, 4 a.m. | 5.3 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 23.0 | |
| May 18, 2019, 3 a.m. | 4.5 ppb (4) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.1 ppb (1) | N/A | 2.8 μg/m3 (12) | 25.0 | |
| May 18, 2019, 2 a.m. | 3.8 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 2.7 μg/m3 (11) | 25.0 | |
| May 18, 2019, 1 a.m. | 4.3 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 37.0 ppb (28) | 0.1 ppb (1) | N/A | 3.1 μg/m3 (13) | 28.0 | |
| May 18, 2019, midnight | 4.0 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | 3.3 μg/m3 (14) | 29.0 | |
| May 17, 2019, 11 p.m. | 3.6 ppb (3) | 1.2 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | 3.1 μg/m3 (13) | 31.0 | |
| May 17, 2019, 10 p.m. | 3.2 ppb (3) | 1.1 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | 3.1 μg/m3 (13) | 31.0 | |
| May 17, 2019, 9 p.m. | 3.5 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | 3.0 μg/m3 (12) | 32.0 | |
| May 17, 2019, 8 p.m. | 3.6 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 31.0 | |
| May 17, 2019, 7 p.m. | 3.9 ppb (4) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 30.0 | |
| May 17, 2019, 6 p.m. | 4.7 ppb (4) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | 2.5 μg/m3 (10) | 28.0 | |
| May 17, 2019, 5 p.m. | 5.3 ppb (5) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.1 ppb (1) | N/A | 1.8 μg/m3 (8) | 22.0 | |
| May 17, 2019, 4 p.m. | 6.6 ppb (6) | 2.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 1.5 μg/m3 (6) | 21.0 | |
| May 17, 2019, 3 p.m. | 6.9 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 21.0 ppb (16) | 0.1 ppb (1) | N/A | 1.7 μg/m3 (7) | 16.0 | |
| May 17, 2019, 2 p.m. | 5.7 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 2.1 μg/m3 (9) | 17.0 | |
| May 17, 2019, 1 p.m. | 4.8 ppb (4) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 2.6 μg/m3 (11) | 17.0 | |
| May 17, 2019, noon | 3.4 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 2.4 μg/m3 (10) | 20.0 | |
| May 17, 2019, 11 a.m. | 3.3 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 2.4 μg/m3 (10) | 22.0 | |
| May 17, 2019, 10 a.m. | 3.2 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 2.4 μg/m3 (10) | 22.0 | |
| May 17, 2019, 9 a.m. | 3.1 ppb (3) | 0.9 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 2.6 μg/m3 (11) | 23.0 | |
| May 17, 2019, 8 a.m. | 3.7 ppb (3) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.1 ppb (1) | N/A | 2.5 μg/m3 (10) | 22.0 | |
| May 17, 2019, 7 a.m. | 3.6 ppb (3) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.1 ppb (1) | N/A | 2.0 μg/m3 (8) | 24.0 | |
| May 17, 2019, 6 a.m. | 4.9 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 2.1 μg/m3 (9) | 20.0 | |
| May 17, 2019, 5 a.m. | 7.3 ppb (7) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.1 ppb (1) | N/A | 3.8 μg/m3 (16) | 16.0 | |
| May 17, 2019, 4 a.m. | 12.3 ppb (11) | 1.2 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 13.0 ppb (10) | 0.2 ppb (2) | N/A | 5.9 μg/m3 (25) | 25.0 | |
| May 17, 2019, 3 a.m. | 11.4 ppb (11) | 1.4 ppb (1) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 15.0 ppb (12) | 0.2 ppb (2) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| May 17, 2019, 2 a.m. | 6.6 ppb (6) | 1.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 23.0 ppb (18) | 0.1 ppb (1) | N/A | 4.1 μg/m3 (17) | 18.0 | |
| May 17, 2019, 1 a.m. | 6.8 ppb (6) | 1.2 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 22.0 | |
| May 17, 2019, midnight | 8.0 ppb (7) | 1.5 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 2.9 μg/m3 (12) | 22.0 | |
| May 16, 2019, 11 p.m. | 5.6 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 3.1 μg/m3 (13) | 23.0 | |
| May 16, 2019, 10 p.m. | 5.5 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 31.0 ppb (24) | 0.1 ppb (1) | N/A | N/A | 24.0 | |
| May 16, 2019, 9 p.m. | 5.3 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 2.9 μg/m3 (12) | 25.0 | |
| May 16, 2019, 8 p.m. | 5.4 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 2.9 μg/m3 (12) | 25.0 | |
| May 16, 2019, 7 p.m. | 4.9 ppb (5) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 2.3 μg/m3 (10) | 25.0 | |
| May 16, 2019, 6 p.m. | 5.0 ppb (5) | 1.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.1 ppb (1) | N/A | 2.3 μg/m3 (10) | 26.0 | |
| May 16, 2019, 5 p.m. | 6.9 ppb (6) | 2.2 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 2.5 μg/m3 (10) | 17.0 | |
| May 16, 2019, 4 p.m. | 12.2 ppb (11) | 4.4 ppb (4) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 9.0 ppb (7) | 0.1 ppb (1) | N/A | 6.1 μg/m3 (25) | 25.0 | |
| May 16, 2019, 3 p.m. | 22.6 ppb (21) | 10.6 ppb (10) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | 3.0 ppb (2) | 0.2 ppb (2) | N/A | 7.3 μg/m3 (30) | 30.0 | |
| May 16, 2019, 2 p.m. | 30.9 ppb (29) | 16.9 ppb (16) | N/A | 14.0 ppb (13) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.2 ppb (2) | N/A | 9.2 μg/m3 (38) | 38.0 | |
| May 16, 2019, 1 p.m. | 22.7 ppb (21) | 8.6 ppb (8) | N/A | 14.0 ppb (13) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.2 ppb (2) | N/A | 8.1 μg/m3 (34) | 34.0 | |
| May 16, 2019, noon | 13.3 ppb (12) | 2.5 ppb (2) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 2.0 ppb (2) | 0.1 ppb (1) | N/A | 8.9 μg/m3 (37) | 37.0 | |
| May 16, 2019, 11 a.m. | 14.0 ppb (13) | 2.2 ppb (2) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 10.4 μg/m3 (43) | 43.0 | |
| May 16, 2019, 10 a.m. | 12.4 ppb (11) | 1.4 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 9.2 μg/m3 (38) | 38.0 | |
| May 16, 2019, 9 a.m. | 11.8 ppb (11) | 1.3 ppb (1) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 5.0 ppb (4) | 0.1 ppb (1) | N/A | 8.3 μg/m3 (35) | 35.0 | |
| May 16, 2019, 8 a.m. | 15.5 ppb (14) | 1.3 ppb (1) | N/A | 14.0 ppb (13) | N/A | 0.0 ppb (0) | 5.0 ppb (4) | 0.1 ppb (1) | N/A | 10.2 μg/m3 (42) | 42.0 | |
| May 16, 2019, 7 a.m. | 14.8 ppb (14) | 1.3 ppb (1) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | 6.0 ppb (5) | 0.1 ppb (1) | N/A | 8.4 μg/m3 (35) | 35.0 | |
| May 16, 2019, 6 a.m. | 13.1 ppb (12) | 1.6 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 7.0 ppb (5) | 0.1 ppb (1) | N/A | 6.7 μg/m3 (28) | 28.0 | |
| May 16, 2019, 5 a.m. | 13.1 ppb (12) | 2.0 ppb (2) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 6.0 ppb (5) | 0.2 ppb (2) | N/A | 7.9 μg/m3 (33) | 33.0 | |
| May 16, 2019, 4 a.m. | 14.9 ppb (14) | 1.9 ppb (2) | N/A | 13.0 ppb (12) | N/A | 0.0 ppb (0) | 5.0 ppb (4) | 0.2 ppb (2) | N/A | 7.4 μg/m3 (31) | 31.0 | |
| May 16, 2019, 3 a.m. | 11.1 ppb (10) | 1.5 ppb (1) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 9.0 ppb (7) | 0.2 ppb (2) | N/A | 5.7 μg/m3 (24) | 24.0 | |
| May 16, 2019, 2 a.m. | 9.6 ppb (9) | 1.6 ppb (1) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 15.0 ppb (12) | 0.1 ppb (1) | N/A | 4.8 μg/m3 (20) | 20.0 | |
| May 16, 2019, 1 a.m. | 11.8 ppb (11) | 2.4 ppb (2) | N/A | 9.0 ppb (8) | N/A | 1.0 ppb (1) | 14.0 ppb (11) | 0.2 ppb (2) | N/A | 4.4 μg/m3 (18) | 18.0 | |
| May 16, 2019, midnight | 9.9 ppb (9) | 2.0 ppb (2) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 16.0 ppb (12) | 0.1 ppb (1) | N/A | 3.8 μg/m3 (16) | 16.0 | |
| May 15, 2019, 11 p.m. | 6.9 ppb (6) | 1.7 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 2.7 μg/m3 (11) | 18.0 | |
| May 15, 2019, 10 p.m. | 7.3 ppb (7) | 2.4 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.1 ppb (1) | N/A | 2.4 μg/m3 (10) | 19.0 | |
| May 15, 2019, 9 p.m. | 7.1 ppb (7) | 2.2 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 2.2 μg/m3 (9) | 20.0 | |
| May 15, 2019, 8 p.m. | 7.4 ppb (7) | 2.4 ppb (2) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 2.2 μg/m3 (9) | 20.0 | |
| May 15, 2019, 7 p.m. | 6.9 ppb (6) | 2.6 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 2.2 μg/m3 (9) | 21.0 | |
| May 15, 2019, 6 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 2.0 μg/m3 (8) | 18.0 | |
| May 15, 2019, 5 p.m. | N/A | N/A | N/A | N/A | N/A | 0.0 ppb (0) | 16.0 ppb (12) | 0.1 ppb (1) | N/A | 2.5 μg/m3 (10) | 12.0 | |
| May 15, 2019, 4 p.m. | 20.8 ppb (19) | 8.9 ppb (8) | N/A | 12.0 ppb (11) | N/A | N/A | 6.0 ppb (5) | 0.2 ppb (2) | N/A | 4.8 μg/m3 (20) | 20.0 | |
| May 15, 2019, 3 p.m. | 19.8 ppb (18) | 8.6 ppb (8) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 6.0 ppb (5) | N/A | N/A | 5.7 μg/m3 (24) | 24.0 | |
| May 15, 2019, 2 p.m. | 15.7 ppb (15) | 5.7 ppb (5) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 6.0 ppb (5) | 0.1 ppb (1) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 15, 2019, 1 p.m. | 11.2 ppb (10) | 2.4 ppb (2) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 5.0 ppb (4) | 0.1 ppb (1) | N/A | 6.3 μg/m3 (26) | 26.0 | |
| May 15, 2019, noon | 11.7 ppb (11) | 1.6 ppb (1) | N/A | 10.0 ppb (9) | N/A | 0.0 ppb (0) | 6.0 ppb (5) | 0.1 ppb (1) | N/A | 7.7 μg/m3 (32) | 32.0 | |
| May 15, 2019, 11 a.m. | 12.8 ppb (12) | 1.3 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 6.0 ppb (5) | 0.1 ppb (1) | N/A | 6.9 μg/m3 (29) | 29.0 | |
| May 15, 2019, 10 a.m. | 12.3 ppb (11) | 1.3 ppb (1) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 5.0 ppb (4) | 0.1 ppb (1) | N/A | 4.9 μg/m3 (20) | 20.0 | |
| May 15, 2019, 9 a.m. | 13.8 ppb (13) | 1.6 ppb (1) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | 4.0 ppb (3) | 0.1 ppb (1) | N/A | 4.4 μg/m3 (18) | 18.0 | |
| May 15, 2019, 8 a.m. | 14.5 ppb (13) | 2.3 ppb (2) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | 3.0 ppb (2) | 0.2 ppb (2) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| May 15, 2019, 7 a.m. | 16.4 ppb (15) | 4.0 ppb (4) | N/A | 12.0 ppb (11) | N/A | 0.0 ppb (0) | 1.0 ppb (1) | 0.2 ppb (2) | N/A | 6.3 μg/m3 (26) | 26.0 | |
| May 15, 2019, 6 a.m. | 13.4 ppb (12) | 2.1 ppb (2) | N/A | 11.0 ppb (10) | N/A | 0.0 ppb (0) | 3.0 ppb (2) | 0.2 ppb (2) | N/A | 6.3 μg/m3 (26) | 26.0 | |
| May 15, 2019, 5 a.m. | 8.8 ppb (8) | 1.2 ppb (1) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 12.0 ppb (9) | 0.1 ppb (1) | N/A | 4.9 μg/m3 (20) | 20.0 | |
| May 15, 2019, 4 a.m. | 6.6 ppb (6) | 1.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 18.0 ppb (14) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 14.0 | |
| May 15, 2019, 3 a.m. | 4.6 ppb (4) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 2.9 μg/m3 (12) | 18.0 | |
| May 15, 2019, 2 a.m. | 3.6 ppb (3) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 2.2 μg/m3 (9) | 21.0 | |
| May 15, 2019, 1 a.m. | 3.6 ppb (3) | 1.3 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 2.1 μg/m3 (9) | 22.0 | |
| May 15, 2019, midnight | 4.0 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.1 ppb (1) | N/A | 2.3 μg/m3 (10) | 19.0 | |
| May 14, 2019, 11 p.m. | 5.3 ppb (5) | 1.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 2.8 μg/m3 (12) | 17.0 | |
| May 14, 2019, 10 p.m. | 5.0 ppb (5) | 1.5 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 2.9 μg/m3 (12) | 18.0 | |
| May 14, 2019, 9 p.m. | 3.8 ppb (4) | 1.4 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 2.7 μg/m3 (11) | 20.0 | |
| May 14, 2019, 8 p.m. | 4.1 ppb (4) | 1.6 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 3.0 μg/m3 (12) | 18.0 | |
| May 14, 2019, 7 p.m. | 4.9 ppb (5) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 17.0 | |
| May 14, 2019, 6 p.m. | 5.2 ppb (5) | 1.9 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 4.1 μg/m3 (17) | 17.0 | |
| May 14, 2019, 5 p.m. | 6.3 ppb (6) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 20.0 ppb (15) | 0.1 ppb (1) | N/A | 4.1 μg/m3 (17) | 17.0 | |
| May 14, 2019, 4 p.m. | 7.6 ppb (7) | 2.0 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.1 ppb (1) | N/A | 3.3 μg/m3 (14) | 15.0 | |
| May 14, 2019, 3 p.m. | 8.6 ppb (8) | 1.9 ppb (2) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 18.0 ppb (14) | 0.1 ppb (1) | N/A | 3.4 μg/m3 (14) | 14.0 | |
| May 14, 2019, 2 p.m. | 7.4 ppb (7) | 1.2 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 20.0 ppb (15) | 0.1 ppb (1) | N/A | 3.6 μg/m3 (15) | 15.0 | |
| May 14, 2019, 1 p.m. | 5.5 ppb (5) | 0.9 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 3.6 μg/m3 (15) | 17.0 | |
| May 14, 2019, noon | 3.7 ppb (3) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 3.7 μg/m3 (15) | 21.0 | |
| May 14, 2019, 11 a.m. | 3.3 ppb (3) | 1.0 ppb (1) | N/A | 2.0 ppb (2) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 3.5 μg/m3 (15) | 15.0 | |
| May 14, 2019, 10 a.m. | 3.6 ppb (3) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | N/A | 0.1 ppb (1) | N/A | 3.6 μg/m3 (15) | 15.0 | |
| May 14, 2019, 9 a.m. | 3.9 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 3.9 μg/m3 (16) | 22.0 | |
| May 14, 2019, 8 a.m. | 5.4 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 5.7 μg/m3 (24) | 24.0 | |
| May 14, 2019, 7 a.m. | 4.9 ppb (5) | 1.0 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| May 14, 2019, 6 a.m. | 4.4 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 30.0 ppb (23) | 0.1 ppb (1) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| May 14, 2019, 5 a.m. | 7.6 ppb (7) | 1.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 7.5 μg/m3 (31) | 31.0 | |
| May 14, 2019, 4 a.m. | 6.9 ppb (6) | 1.1 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 6.5 μg/m3 (27) | 27.0 | |
| May 14, 2019, 3 a.m. | 5.2 ppb (5) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 6.3 μg/m3 (26) | 26.0 | |
| May 14, 2019, 2 a.m. | 4.7 ppb (4) | 1.1 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | 6.0 μg/m3 (25) | 31.0 | |
| May 14, 2019, 1 a.m. | 4.8 ppb (4) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | 6.4 μg/m3 (27) | 32.0 | |
| May 14, 2019, midnight | 4.4 ppb (4) | 1.2 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 43.0 ppb (33) | 0.1 ppb (1) | N/A | 6.0 μg/m3 (25) | 33.0 | |
| May 13, 2019, 11 p.m. | 4.6 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | 4.7 μg/m3 (20) | 30.0 | |
| May 13, 2019, 10 p.m. | 5.5 ppb (5) | 1.7 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | 6.2 μg/m3 (26) | 29.0 | |
| May 13, 2019, 9 p.m. | 5.7 ppb (5) | 1.9 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 35.0 ppb (27) | 0.1 ppb (1) | N/A | 6.3 μg/m3 (26) | 27.0 | |
| May 13, 2019, 8 p.m. | 5.1 ppb (5) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| May 13, 2019, 7 p.m. | 5.3 ppb (5) | 1.8 ppb (2) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.1 ppb (1) | N/A | 6.2 μg/m3 (26) | 26.0 | |
| May 13, 2019, 6 p.m. | 5.7 ppb (5) | 1.8 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.1 ppb (1) | N/A | 5.7 μg/m3 (24) | 25.0 | |
| May 13, 2019, 5 p.m. | 8.4 ppb (8) | 2.6 ppb (2) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.1 ppb (1) | N/A | 6.4 μg/m3 (27) | 27.0 | |
| May 13, 2019, 4 p.m. | 9.6 ppb (9) | 2.8 ppb (3) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 28.0 ppb (22) | 0.1 ppb (1) | N/A | 6.3 μg/m3 (26) | 26.0 | |
| May 13, 2019, 3 p.m. | 11.2 ppb (10) | 2.4 ppb (2) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.1 ppb (1) | N/A | 6.4 μg/m3 (27) | 27.0 | |
| May 13, 2019, 2 p.m. | 10.3 ppb (10) | 2.1 ppb (2) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 29.0 ppb (22) | 0.1 ppb (1) | N/A | 6.3 μg/m3 (26) | 26.0 | |
| May 13, 2019, 1 p.m. | 9.0 ppb (8) | 1.3 ppb (1) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 26.0 ppb (20) | 0.1 ppb (1) | N/A | 5.5 μg/m3 (23) | 23.0 | |
| May 13, 2019, noon | 6.5 ppb (6) | 1.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 13, 2019, 11 a.m. | 8.0 ppb (7) | 1.2 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 21.0 ppb (16) | 0.1 ppb (1) | N/A | 5.1 μg/m3 (21) | 21.0 | |
| May 13, 2019, 10 a.m. | 7.0 ppb (6) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 13, 2019, 9 a.m. | 9.7 ppb (9) | 1.0 ppb (1) | N/A | 9.0 ppb (8) | N/A | 0.0 ppb (0) | 19.0 ppb (15) | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 13, 2019, 8 a.m. | 9.2 ppb (9) | 0.9 ppb (1) | N/A | 8.0 ppb (7) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 5.4 μg/m3 (23) | 23.0 | |
| May 13, 2019, 7 a.m. | 7.8 ppb (7) | 1.0 ppb (1) | N/A | 7.0 ppb (6) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.2 ppb (2) | N/A | 5.3 μg/m3 (22) | 22.0 | |
| May 13, 2019, 6 a.m. | 5.5 ppb (5) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 34.0 ppb (26) | 0.1 ppb (1) | N/A | 4.8 μg/m3 (20) | 26.0 | |
| May 13, 2019, 5 a.m. | 5.9 ppb (5) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 38.0 ppb (29) | 0.1 ppb (1) | N/A | 4.8 μg/m3 (20) | 29.0 | |
| May 13, 2019, 4 a.m. | 6.1 ppb (6) | 1.2 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | 5.0 μg/m3 (21) | 30.0 | |
| May 13, 2019, 3 a.m. | 5.8 ppb (5) | 1.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | 0.0 ppb (0) | 40.0 ppb (31) | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 31.0 | |
| May 13, 2019, 2 a.m. | 5.6 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 36.0 ppb (28) | 0.1 ppb (1) | N/A | 5.1 μg/m3 (21) | 28.0 | |
| May 13, 2019, 1 a.m. | 5.6 ppb (5) | 1.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 33.0 ppb (25) | 0.1 ppb (1) | N/A | 4.6 μg/m3 (19) | 25.0 | |
| May 13, 2019, midnight | 5.3 ppb (5) | 1.2 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 41.0 ppb (32) | 0.1 ppb (1) | N/A | 4.9 μg/m3 (20) | 32.0 | |
| May 12, 2019, 11 p.m. | 5.6 ppb (5) | 1.4 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 46.0 ppb (35) | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 35.0 | |
| May 12, 2019, 10 p.m. | 5.4 ppb (5) | 1.3 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 44.0 ppb (34) | 0.1 ppb (1) | N/A | 6.1 μg/m3 (25) | 34.0 | |
| May 12, 2019, 9 p.m. | 5.1 ppb (5) | 1.5 ppb (1) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 39.0 ppb (30) | 0.1 ppb (1) | N/A | 5.7 μg/m3 (24) | 30.0 | |
| May 12, 2019, 8 p.m. | 5.9 ppb (5) | 2.1 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 32.0 ppb (25) | 0.1 ppb (1) | N/A | 5.9 μg/m3 (25) | 25.0 | |
| May 12, 2019, 7 p.m. | 6.5 ppb (6) | 2.4 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 27.0 ppb (21) | 0.1 ppb (1) | N/A | 5.9 μg/m3 (25) | 25.0 | |
| May 12, 2019, 6 p.m. | 6.0 ppb (6) | 2.3 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 25.0 ppb (19) | 0.1 ppb (1) | N/A | 5.8 μg/m3 (24) | 24.0 | |
| May 12, 2019, 5 p.m. | 5.5 ppb (5) | 2.0 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 24.0 ppb (18) | 0.1 ppb (1) | N/A | 5.2 μg/m3 (22) | 22.0 | |
| May 12, 2019, 4 p.m. | 5.4 ppb (5) | 1.8 ppb (2) | N/A | 4.0 ppb (4) | N/A | 0.0 ppb (0) | 22.0 ppb (17) | 0.1 ppb (1) | N/A | 4.5 μg/m3 (19) | 19.0 | |
| May 12, 2019, 3 p.m. | 4.8 ppb (4) | 1.4 ppb (1) | N/A | 3.0 ppb (3) | N/A | 0.0 ppb (0) | 23.0 ppb (18) | 0.1 ppb (1) | N/A | 4.3 μg/m3 (18) | 18.0 |