Tacoma (I 5) WA, US: 47.22634, -122.46256
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 21, 2019, 9 a.m. | 23.9 ppb (22) | 4.8 ppb (4) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 22.0 | |
| May 21, 2019, 8 a.m. | 27.6 ppb (26) | 6.6 ppb (6) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 26.0 | |
| May 21, 2019, 7 a.m. | 13.3 ppb (12) | 1.0 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 21, 2019, 6 a.m. | 11.1 ppb (10) | 0.4 ppb (0) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 10.0 | |
| May 21, 2019, 5 a.m. | 17.2 ppb (16) | 0.9 ppb (1) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 16.0 | |
| May 21, 2019, 4 a.m. | 12.9 ppb (12) | 0.7 ppb (1) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 12.0 | |
| May 21, 2019, 3 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 21, 2019, 2 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| May 21, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 21, 2019, midnight | 4.7 ppb (4) | 0.4 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 20, 2019, 11 p.m. | 25.5 ppb (24) | 9.1 ppb (8) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 24.0 | |
| May 20, 2019, 10 p.m. | 36.9 ppb (34) | 20.0 ppb (19) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 34.0 | |
| May 20, 2019, 9 p.m. | 36.1 ppb (33) | 18.8 ppb (17) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 33.0 | |
| May 20, 2019, 8 p.m. | 34.0 ppb (31) | 18.0 ppb (17) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 31.0 | |
| May 20, 2019, 7 p.m. | 30.4 ppb (28) | 15.7 ppb (15) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 28.0 | |
| May 20, 2019, 6 p.m. | 34.3 ppb (32) | 20.3 ppb (19) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 32.0 | |
| May 20, 2019, 5 p.m. | 35.7 ppb (33) | 18.7 ppb (17) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 33.0 | |
| May 20, 2019, 4 p.m. | 38.7 ppb (36) | 20.0 ppb (19) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 36.0 | |
| May 20, 2019, 3 p.m. | 38.3 ppb (35) | 19.2 ppb (18) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| May 20, 2019, 2 p.m. | 37.6 ppb (35) | 17.2 ppb (16) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 35.0 | |
| May 20, 2019, 1 p.m. | 33.8 ppb (31) | 13.6 ppb (13) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 31.0 | |
| May 20, 2019, noon | 29.5 ppb (27) | 11.3 ppb (10) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 27.0 | |
| May 20, 2019, 11 a.m. | 19.2 ppb (18) | 6.0 ppb (6) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 18.0 | |
| May 20, 2019, 10 a.m. | 11.5 ppb (11) | 4.0 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 20, 2019, 9 a.m. | 9.4 ppb (9) | 3.4 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 20, 2019, 8 a.m. | 10.8 ppb (10) | 4.1 ppb (4) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 20, 2019, 7 a.m. | 8.9 ppb (8) | 2.9 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| May 20, 2019, 6 a.m. | 9.2 ppb (9) | 3.0 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 9.0 | |
| May 20, 2019, 5 a.m. | 11.6 ppb (11) | 5.1 ppb (5) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 11.0 | |
| May 20, 2019, 4 a.m. | 14.2 ppb (13) | 6.3 ppb (6) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 13.0 | |
| May 20, 2019, 3 a.m. | 15.4 ppb (14) | 8.0 ppb (7) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 20, 2019, 2 a.m. | 17.2 ppb (16) | 10.1 ppb (9) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 20, 2019, 1 a.m. | 19.2 ppb (18) | 10.1 ppb (9) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 18.0 | |
| May 20, 2019, midnight | 19.9 ppb (18) | 9.8 ppb (9) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 18.0 | |
| May 19, 2019, 11 p.m. | 20.1 ppb (19) | 9.5 ppb (9) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 19.0 | |
| May 19, 2019, 10 p.m. | 26.1 ppb (24) | 12.9 ppb (12) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 24.0 | |
| May 19, 2019, 9 p.m. | 27.0 ppb (25) | 13.1 ppb (12) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 25.0 | |
| May 19, 2019, 8 p.m. | 20.5 ppb (19) | 9.3 ppb (9) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 19.0 | |
| May 19, 2019, 7 p.m. | 23.2 ppb (21) | 10.7 ppb (10) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 19, 2019, 6 p.m. | 18.3 ppb (17) | 8.0 ppb (7) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 19, 2019, 5 p.m. | 19.4 ppb (18) | 8.8 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 19, 2019, 4 p.m. | 13.3 ppb (12) | 3.9 ppb (4) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 19, 2019, 3 p.m. | 20.4 ppb (19) | 9.9 ppb (9) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 19.0 | |
| May 19, 2019, 2 p.m. | 16.7 ppb (15) | 7.3 ppb (7) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 15.0 | |
| May 19, 2019, 1 p.m. | 10.8 ppb (10) | 3.5 ppb (3) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 10.0 | |
| May 19, 2019, noon | 10.9 ppb (10) | 3.9 ppb (4) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 10.0 | |
| May 19, 2019, 11 a.m. | 6.8 ppb (6) | 1.8 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 6.0 | |
| May 19, 2019, 10 a.m. | 9.0 ppb (8) | 2.0 ppb (2) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| May 19, 2019, 9 a.m. | 3.9 ppb (4) | 0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| May 19, 2019, 8 a.m. | 7.2 ppb (7) | 2.3 ppb (2) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 8.0 | |
| May 19, 2019, 7 a.m. | 9.2 ppb (9) | 3.8 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 9.0 | |
| May 19, 2019, 6 a.m. | 9.7 ppb (9) | 3.6 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| May 19, 2019, 5 a.m. | 19.4 ppb (18) | 6.9 ppb (6) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 19, 2019, 4 a.m. | 23.0 ppb (21) | 4.5 ppb (4) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 19, 2019, 3 a.m. | 24.3 ppb (23) | 5.8 ppb (5) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 23.0 | |
| May 19, 2019, 2 a.m. | 29.9 ppb (28) | 9.3 ppb (9) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 28.0 | |
| May 19, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | N/A | |
| May 19, 2019, midnight | 22.1 ppb (20) | 7.5 ppb (7) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 20.0 | |
| May 18, 2019, 11 p.m. | 24.0 ppb (22) | 10.6 ppb (10) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 22.0 | |
| May 18, 2019, 10 p.m. | 21.6 ppb (20) | 9.8 ppb (9) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 20.0 | |
| May 18, 2019, 9 p.m. | 19.8 ppb (18) | 8.7 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 18.0 | |
| May 18, 2019, 8 p.m. | 20.9 ppb (19) | 10.0 ppb (9) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 19.0 | |
| May 18, 2019, 7 p.m. | 26.4 ppb (24) | 13.1 ppb (12) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 24.0 | |
| May 18, 2019, 6 p.m. | 22.5 ppb (21) | 11.4 ppb (11) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 21.0 | |
| May 18, 2019, 5 p.m. | 24.1 ppb (22) | 12.3 ppb (11) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 22.0 | |
| May 18, 2019, 4 p.m. | 23.4 ppb (22) | 12.0 ppb (11) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 18, 2019, 3 p.m. | 21.8 ppb (20) | 9.3 ppb (9) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 18, 2019, 2 p.m. | 31.2 ppb (29) | 11.9 ppb (11) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 18, 2019, 1 p.m. | 33.8 ppb (31) | 12.3 ppb (11) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| May 18, 2019, noon | 17.5 ppb (16) | 1.4 ppb (1) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| May 18, 2019, 11 a.m. | 10.2 ppb (9) | 0.4 ppb (0) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 18, 2019, 10 a.m. | 12.6 ppb (12) | 1.3 ppb (1) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 18, 2019, 9 a.m. | 17.3 ppb (16) | 4.9 ppb (5) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| May 18, 2019, 8 a.m. | 12.0 ppb (11) | 2.2 ppb (2) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 14.0 μg/m3 (54) | 54.0 | |
| May 18, 2019, 7 a.m. | 18.9 ppb (18) | 5.5 ppb (5) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 18.0 | |
| May 18, 2019, 6 a.m. | 23.1 ppb (21) | 8.4 ppb (8) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 21.0 | |
| May 18, 2019, 5 a.m. | 25.9 ppb (24) | 10.7 ppb (10) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 24.0 | |
| May 18, 2019, 4 a.m. | 24.5 ppb (23) | 10.9 ppb (10) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 23.0 | |
| May 18, 2019, 3 a.m. | 28.2 ppb (26) | 15.2 ppb (14) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 26.0 | |
| May 18, 2019, 2 a.m. | 27.2 ppb (25) | 14.6 ppb (14) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 25.0 | |
| May 18, 2019, 1 a.m. | 27.3 ppb (25) | 15.9 ppb (15) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 25.0 | |
| May 18, 2019, midnight | 34.9 ppb (32) | 19.1 ppb (18) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| May 17, 2019, 11 p.m. | 29.2 ppb (27) | 17.9 ppb (17) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 27.0 | |
| May 17, 2019, 10 p.m. | 27.4 ppb (25) | 14.9 ppb (14) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 17, 2019, 9 p.m. | 23.8 ppb (22) | 11.8 ppb (11) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 22.0 | |
| May 17, 2019, 8 p.m. | 27.0 ppb (25) | 15.8 ppb (15) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 25.0 | |
| May 17, 2019, 7 p.m. | 26.5 ppb (25) | 14.5 ppb (13) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 25.0 | |
| May 17, 2019, 6 p.m. | 30.5 ppb (28) | 17.2 ppb (16) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 28.0 | |
| May 17, 2019, 5 p.m. | 34.1 ppb (32) | 19.5 ppb (18) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| May 17, 2019, 4 p.m. | 31.4 ppb (29) | 16.7 ppb (15) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 29.0 | |
| May 17, 2019, 3 p.m. | 29.8 ppb (28) | 16.1 ppb (15) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 28.0 | |
| May 17, 2019, 2 p.m. | 27.7 ppb (26) | 14.6 ppb (14) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 26.0 | |
| May 17, 2019, 1 p.m. | 21.3 ppb (20) | 11.8 ppb (11) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 20.0 | |
| May 17, 2019, noon | 16.0 ppb (15) | 8.2 ppb (8) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 15.0 | |
| May 17, 2019, 11 a.m. | 13.1 ppb (12) | 6.4 ppb (6) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 12.0 | |
| May 17, 2019, 10 a.m. | 8.4 ppb (8) | 4.3 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 17, 2019, 9 a.m. | 6.0 ppb (6) | 3.0 ppb (3) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 17, 2019, 8 a.m. | 7.1 ppb (7) | 3.8 ppb (4) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 7.0 | |
| May 17, 2019, 7 a.m. | 8.4 ppb (8) | 4.4 ppb (4) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | -1.0 μg/m3 (0) | 8.0 | |
| May 17, 2019, 6 a.m. | 12.1 ppb (11) | 6.0 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 11.0 | |
| May 17, 2019, 5 a.m. | 13.1 ppb (12) | 6.4 ppb (6) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 21.0 | |
| May 17, 2019, 4 a.m. | 12.3 ppb (11) | 6.4 ppb (6) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 17.0 | |
| May 17, 2019, 3 a.m. | 16.2 ppb (15) | 8.8 ppb (8) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 15.0 | |
| May 17, 2019, 2 a.m. | 18.6 ppb (17) | 11.7 ppb (11) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 17.0 | |
| May 17, 2019, 1 a.m. | 24.2 ppb (22) | 14.8 ppb (14) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 22.0 | |
| May 17, 2019, midnight | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| May 16, 2019, 11 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 16, 2019, 10 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 42.0 | |
| May 16, 2019, 9 p.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| May 16, 2019, 8 p.m. | 56.9 ppb (53) | 30.2 ppb (28) | N/A | 27.0 ppb (25) | N/A | N/A | N/A | N/A | N/A | 21.0 μg/m3 (69) | 69.0 | |
| May 16, 2019, 7 p.m. | 58.7 ppb (55) | 34.4 ppb (32) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | 18.0 μg/m3 (63) | 63.0 | |
| May 16, 2019, 6 p.m. | 38.1 ppb (35) | 19.1 ppb (18) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 16, 2019, 5 p.m. | 25.1 ppb (23) | 10.9 ppb (10) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 11.0 μg/m3 (46) | 46.0 | |
| May 16, 2019, 4 p.m. | 51.0 ppb (47) | 28.6 ppb (26) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| May 16, 2019, 3 p.m. | 52.4 ppb (49) | 28.4 ppb (26) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 16, 2019, 2 p.m. | 54.1 ppb (50) | 30.6 ppb (28) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | 10.0 μg/m3 (42) | 50.0 | |
| May 16, 2019, 1 p.m. | 45.4 ppb (42) | 22.5 ppb (21) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | 12.0 μg/m3 (50) | 50.0 | |
| May 16, 2019, noon | 51.1 ppb (47) | 27.8 ppb (26) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | 13.0 μg/m3 (52) | 52.0 | |
| May 16, 2019, 11 a.m. | 35.9 ppb (33) | 16.6 ppb (15) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 16, 2019, 10 a.m. | 35.8 ppb (33) | 19.9 ppb (18) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 33.0 | |
| May 16, 2019, 9 a.m. | 16.1 ppb (15) | 2.7 ppb (3) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 16, 2019, 8 a.m. | 20.8 ppb (19) | 7.0 ppb (6) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 16.0 μg/m3 (59) | 59.0 | |
| May 16, 2019, 7 a.m. | 23.9 ppb (22) | 7.5 ppb (7) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 22.0 | |
| May 16, 2019, 6 a.m. | 29.6 ppb (27) | 13.3 ppb (12) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 27.0 | |
| May 16, 2019, 5 a.m. | 35.0 ppb (32) | 14.0 ppb (13) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 9.0 μg/m3 (38) | 38.0 | |
| May 16, 2019, 4 a.m. | 24.1 ppb (22) | 5.7 ppb (5) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| May 16, 2019, 3 a.m. | 45.4 ppb (42) | 21.7 ppb (20) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 42.0 | |
| May 16, 2019, 2 a.m. | 41.6 ppb (39) | 18.4 ppb (17) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 39.0 | |
| May 16, 2019, 1 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 16, 2019, midnight | 29.1 ppb (27) | 9.4 ppb (9) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 33.0 | |
| May 15, 2019, 11 p.m. | 24.1 ppb (22) | 6.7 ppb (6) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 22.0 | |
| May 15, 2019, 10 p.m. | 23.9 ppb (22) | 9.1 ppb (8) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 22.0 | |
| May 15, 2019, 9 p.m. | 23.8 ppb (22) | 8.7 ppb (8) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 22.0 | |
| May 15, 2019, 8 p.m. | 32.0 ppb (30) | 15.1 ppb (14) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 30.0 | |
| May 15, 2019, 7 p.m. | 35.0 ppb (32) | 18.5 ppb (17) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 32.0 | |
| May 15, 2019, 6 p.m. | 34.4 ppb (32) | 17.5 ppb (16) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 32.0 | |
| May 15, 2019, 5 p.m. | 45.3 ppb (42) | 26.1 ppb (24) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 42.0 | |
| May 15, 2019, 4 p.m. | 22.9 ppb (21) | 11.6 ppb (11) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 21.0 | |
| May 15, 2019, 3 p.m. | 36.0 ppb (33) | 19.9 ppb (18) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 33.0 | |
| May 15, 2019, 2 p.m. | 42.7 ppb (40) | 23.1 ppb (21) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 40.0 | |
| May 15, 2019, 1 p.m. | 45.7 ppb (42) | 22.6 ppb (21) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 42.0 | |
| May 15, 2019, noon | 30.5 ppb (28) | 9.9 ppb (9) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 28.0 | |
| May 15, 2019, 11 a.m. | 18.6 ppb (17) | 6.2 ppb (6) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 17.0 | |
| May 15, 2019, 10 a.m. | 4.1 ppb (4) | 0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 12.0 | |
| May 15, 2019, 9 a.m. | 12.5 ppb (12) | 3.3 ppb (3) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 12.0 | |
| May 15, 2019, 8 a.m. | 2.6 ppb (2) | 0.0 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| May 15, 2019, 7 a.m. | 11.3 ppb (10) | 2.4 ppb (2) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 10.0 | |
| May 15, 2019, 6 a.m. | 16.1 ppb (15) | 5.9 ppb (5) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 15.0 | |
| May 15, 2019, 5 a.m. | 17.9 ppb (17) | 7.7 ppb (7) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 17.0 | |
| May 15, 2019, 4 a.m. | 20.9 ppb (19) | 9.4 ppb (9) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 19.0 | |
| May 15, 2019, 3 a.m. | 30.6 ppb (28) | 15.8 ppb (15) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 0.0 μg/m3 (0) | 28.0 | |
| May 15, 2019, 2 a.m. | 30.4 ppb (28) | 14.9 ppb (14) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 28.0 | |
| May 15, 2019, 1 a.m. | 29.3 ppb (27) | 14.9 ppb (14) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 27.0 | |
| May 15, 2019, midnight | 25.4 ppb (24) | 14.0 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 24.0 | |
| May 14, 2019, 11 p.m. | 29.7 ppb (28) | 16.0 ppb (15) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | N/A | N/A | 3.0 μg/m3 (12) | 28.0 | |
| May 14, 2019, 10 p.m. | 25.4 ppb (24) | 14.1 ppb (13) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 4.0 μg/m3 (17) | 24.0 | |
| May 14, 2019, 9 p.m. | 27.4 ppb (25) | 16.4 ppb (15) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 25.0 | |
| May 14, 2019, 8 p.m. | 27.6 ppb (26) | 15.1 ppb (14) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 2.0 μg/m3 (8) | 26.0 | |
| May 14, 2019, 7 p.m. | 33.5 ppb (31) | 18.5 ppb (17) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 31.0 | |
| May 14, 2019, 6 p.m. | 32.1 ppb (30) | 17.4 ppb (16) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 5.0 μg/m3 (21) | 30.0 | |
| May 14, 2019, 5 p.m. | 16.2 ppb (15) | 6.4 ppb (6) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 14, 2019, 4 p.m. | 39.6 ppb (37) | 19.1 ppb (18) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 8.0 μg/m3 (33) | 37.0 | |
| May 14, 2019, 3 p.m. | 36.9 ppb (34) | 15.9 ppb (15) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 34.0 | |
| May 14, 2019, 2 p.m. | 17.3 ppb (16) | 6.1 ppb (6) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 | |
| May 14, 2019, 1 p.m. | 23.9 ppb (22) | 9.0 ppb (8) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 14, 2019, noon | 28.0 ppb (26) | 12.6 ppb (12) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 14, 2019, 11 a.m. | 23.9 ppb (22) | 11.4 ppb (11) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | N/A | N/A | 7.0 μg/m3 (29) | 29.0 | |
| May 14, 2019, 10 a.m. | 22.0 ppb (20) | 8.6 ppb (8) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | N/A | N/A | 6.0 μg/m3 (25) | 25.0 |