Seattle WA, US: 47.597222, -122.319722
| Date Observed (UTC) | NOX | NO | NOY | NO2 | NO2Y | SO2 | OZONE | CO | PM10 | PM2.5 | AQI | AQI/500 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| July 19, 2019, 8 a.m. | 3.9 ppb (4) | 0.3 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.13 ppb (1) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 19, 2019, 7 a.m. | 4.4 ppb (4) | 0.7 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 19, 2019, 6 a.m. | 4.7 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 19, 2019, 5 a.m. | 5.0 ppb (5) | 0.9 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 19, 2019, 4 a.m. | 5.7 ppb (5) | 1.1 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.19 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 19, 2019, 3 a.m. | 6.4 ppb (6) | 0.9 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 19, 2019, 2 a.m. | 10.6 ppb (10) | 2.4 ppb (2) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 19, 2019, 1 a.m. | 32.7 ppb (30) | 12.0 ppb (11) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 5.0 μg/m3 (21) | 30.0 | |
| July 19, 2019, midnight | 17.1 ppb (16) | 7.2 ppb (7) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 3.0 μg/m3 (12) | 16.0 | |
| July 18, 2019, 11 p.m. | 10.0 ppb (9) | 4.0 ppb (4) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.2 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 18, 2019, 10 p.m. | 33.1 ppb (31) | 19.9 ppb (18) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | 7.0 μg/m3 (29) | 31.0 | |
| July 18, 2019, 9 p.m. | 46.8 ppb (43) | 28.4 ppb (26) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | 8.0 μg/m3 (33) | 43.0 | |
| July 18, 2019, 8 p.m. | 54.6 ppb (51) | 35.3 ppb (33) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.58 ppb (6) | N/A | 7.0 μg/m3 (29) | 51.0 | |
| July 18, 2019, 7 p.m. | 58.9 ppb (55) | 38.2 ppb (35) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 55.0 | |
| July 18, 2019, 6 p.m. | 14.6 ppb (14) | 7.1 ppb (7) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 18, 2019, 5 p.m. | 8.1 ppb (8) | 3.4 ppb (3) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 18, 2019, 4 p.m. | 9.4 ppb (9) | 4.5 ppb (4) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 2.0 μg/m3 (8) | 9.0 | |
| July 18, 2019, 3 p.m. | 12.5 ppb (12) | 5.0 ppb (5) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 2.0 μg/m3 (8) | 12.0 | |
| July 18, 2019, 2 p.m. | 16.1 ppb (15) | 4.1 ppb (4) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 18, 2019, 1 p.m. | 15.0 ppb (14) | 6.1 ppb (6) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.24 ppb (3) | N/A | 2.0 μg/m3 (8) | 14.0 | |
| July 18, 2019, noon | 3.2 ppb (3) | 0.7 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.11 ppb (1) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 18, 2019, 11 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 | |
| July 18, 2019, 10 a.m. | 3.6 ppb (3) | 1.1 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.1 ppb (1) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 18, 2019, 9 a.m. | 3.5 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.1 ppb (1) | N/A | 0.0 μg/m3 (0) | 3.0 | |
| July 18, 2019, 8 a.m. | 2.9 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.1 ppb (1) | N/A | 0.0 μg/m3 (0) | 3.0 | |
| July 18, 2019, 7 a.m. | 2.7 ppb (3) | 0.7 ppb (1) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.11 ppb (1) | N/A | 0.0 μg/m3 (0) | 3.0 | |
| July 18, 2019, 6 a.m. | 4.4 ppb (4) | 1.0 ppb (1) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 18, 2019, 5 a.m. | 27.3 ppb (25) | 16.8 ppb (16) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 4.0 μg/m3 (17) | 25.0 | |
| July 18, 2019, 4 a.m. | 26.4 ppb (24) | 16.8 ppb (16) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 0.0 μg/m3 (0) | 24.0 | |
| July 18, 2019, 3 a.m. | 20.3 ppb (19) | 13.0 ppb (12) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 3.0 μg/m3 (12) | 19.0 | |
| July 18, 2019, 2 a.m. | 25.4 ppb (24) | 16.1 ppb (15) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 18, 2019, 1 a.m. | 30.8 ppb (29) | 21.3 ppb (20) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 3.0 μg/m3 (12) | 29.0 | |
| July 18, 2019, midnight | 24.0 ppb (22) | 16.6 ppb (15) | N/A | 7.0 ppb (6) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 0.0 μg/m3 (0) | 22.0 | |
| July 17, 2019, 11 p.m. | 28.5 ppb (26) | 18.1 ppb (17) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 1.0 μg/m3 (4) | 26.0 | |
| July 17, 2019, 10 p.m. | 37.0 ppb (34) | 23.7 ppb (22) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 1.0 μg/m3 (4) | 34.0 | |
| July 17, 2019, 9 p.m. | 39.2 ppb (36) | 23.5 ppb (22) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 3.0 μg/m3 (12) | 36.0 | |
| July 17, 2019, 8 p.m. | 29.2 ppb (27) | 18.2 ppb (17) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 6.0 μg/m3 (25) | 27.0 | |
| July 17, 2019, 7 p.m. | 29.8 ppb (28) | 19.5 ppb (18) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 1.0 μg/m3 (4) | 28.0 | |
| July 17, 2019, 6 p.m. | 43.4 ppb (40) | 29.7 ppb (28) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.37 ppb (4) | N/A | 6.0 μg/m3 (25) | 40.0 | |
| July 17, 2019, 5 p.m. | 40.3 ppb (37) | 24.8 ppb (23) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 7.0 μg/m3 (29) | 37.0 | |
| July 17, 2019, 4 p.m. | 38.6 ppb (36) | 19.0 ppb (18) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 3.0 μg/m3 (12) | 36.0 | |
| July 17, 2019, 3 p.m. | 39.6 ppb (37) | 22.7 ppb (21) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 3.0 μg/m3 (12) | 37.0 | |
| July 17, 2019, 2 p.m. | 46.7 ppb (43) | 28.1 ppb (26) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 4.0 μg/m3 (17) | 43.0 | |
| July 17, 2019, 1 p.m. | 62.3 ppb (59) | 36.8 ppb (34) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | 6.0 μg/m3 (25) | 59.0 | |
| July 17, 2019, noon | 33.0 ppb (31) | 18.1 ppb (17) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.32 ppb (4) | N/A | 3.0 μg/m3 (12) | 31.0 | |
| July 17, 2019, 11 a.m. | 19.8 ppb (18) | 9.1 ppb (8) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.21 ppb (2) | N/A | 1.0 μg/m3 (4) | 18.0 | |
| July 17, 2019, 10 a.m. | 12.4 ppb (11) | 4.1 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.12 ppb (1) | N/A | 2.0 μg/m3 (8) | 11.0 | |
| July 17, 2019, 9 a.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 | |
| July 17, 2019, 8 a.m. | 12.2 ppb (11) | 4.4 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 17, 2019, 7 a.m. | 13.1 ppb (12) | 5.3 ppb (5) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 2.0 μg/m3 (8) | 12.0 | |
| July 17, 2019, 6 a.m. | 24.0 ppb (22) | 11.0 ppb (10) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 5.0 μg/m3 (21) | 22.0 | |
| July 17, 2019, 5 a.m. | 51.9 ppb (48) | 25.6 ppb (24) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | 5.0 μg/m3 (21) | 48.0 | |
| July 17, 2019, 4 a.m. | 45.5 ppb (42) | 20.8 ppb (19) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 5.0 μg/m3 (21) | 42.0 | |
| July 17, 2019, 3 a.m. | 48.7 ppb (45) | 24.5 ppb (23) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 3.0 μg/m3 (12) | 45.0 | |
| July 17, 2019, 2 a.m. | 44.5 ppb (41) | 22.6 ppb (21) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.61 ppb (7) | N/A | 4.0 μg/m3 (17) | 41.0 | |
| July 17, 2019, 1 a.m. | 35.8 ppb (33) | 17.8 ppb (16) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 2.0 μg/m3 (8) | 33.0 | |
| July 17, 2019, midnight | 37.1 ppb (34) | 20.2 ppb (19) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 3.0 μg/m3 (12) | 34.0 | |
| July 16, 2019, 11 p.m. | 30.3 ppb (28) | 17.4 ppb (16) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 6.0 μg/m3 (25) | 28.0 | |
| July 16, 2019, 10 p.m. | 46.0 ppb (43) | 29.0 ppb (27) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 7.0 μg/m3 (29) | 43.0 | |
| July 16, 2019, 9 p.m. | 48.0 ppb (44) | 32.6 ppb (30) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 7.0 μg/m3 (29) | 44.0 | |
| July 16, 2019, 8 p.m. | 140.6 ppb (108) | 106.3 ppb (101) | N/A | 35.0 ppb (32) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | 10.0 μg/m3 (42) | 108.0 | |
| July 16, 2019, 7 p.m. | 73.5 ppb (71) | 55.1 ppb (51) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 13.0 μg/m3 (52) | 71.0 | |
| July 16, 2019, 6 p.m. | 80.3 ppb (78) | 60.0 ppb (56) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 13.0 μg/m3 (52) | 78.0 | |
| July 16, 2019, 5 p.m. | 94.2 ppb (93) | 75.5 ppb (73) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 11.0 μg/m3 (46) | 93.0 | |
| July 16, 2019, 4 p.m. | 136.0 ppb (107) | 111.5 ppb (102) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 10.0 μg/m3 (42) | 107.0 | |
| July 16, 2019, 3 p.m. | 134.5 ppb (106) | 105.0 ppb (101) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | 0.46 ppb (5) | N/A | 14.0 μg/m3 (54) | 106.0 | |
| July 16, 2019, 2 p.m. | 128.6 ppb (105) | 95.3 ppb (94) | N/A | 33.0 ppb (31) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 10.0 μg/m3 (42) | 105.0 | |
| July 16, 2019, 1 p.m. | 104.9 ppb (101) | 79.4 ppb (77) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | 0.55 ppb (6) | N/A | 10.0 μg/m3 (42) | 101.0 | |
| July 16, 2019, noon | 97.4 ppb (96) | 69.8 ppb (67) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | 0.66 ppb (7) | N/A | 10.0 μg/m3 (42) | 96.0 | |
| July 16, 2019, 11 a.m. | 81.6 ppb (79) | 56.0 ppb (52) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | 4.0 μg/m3 (17) | 79.0 | |
| July 16, 2019, 10 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 | |
| July 16, 2019, 9 a.m. | 51.3 ppb (48) | 26.9 ppb (25) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 5.0 μg/m3 (21) | 48.0 | |
| July 16, 2019, 8 a.m. | 49.2 ppb (46) | 21.5 ppb (20) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | 0.26 ppb (3) | N/A | 5.0 μg/m3 (21) | 46.0 | |
| July 16, 2019, 7 a.m. | 37.7 ppb (35) | 12.1 ppb (11) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| July 16, 2019, 6 a.m. | 49.4 ppb (46) | 21.6 ppb (20) | N/A | 28.0 ppb (26) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 5.0 μg/m3 (21) | 46.0 | |
| July 16, 2019, 5 a.m. | 37.1 ppb (34) | 16.2 ppb (15) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 4.0 μg/m3 (17) | 34.0 | |
| July 16, 2019, 4 a.m. | 35.3 ppb (33) | 17.2 ppb (16) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 3.0 μg/m3 (12) | 33.0 | |
| July 16, 2019, 3 a.m. | 38.5 ppb (36) | 19.3 ppb (18) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 3.0 μg/m3 (12) | 36.0 | |
| July 16, 2019, 2 a.m. | 43.8 ppb (41) | 22.4 ppb (21) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.56 ppb (6) | N/A | 2.0 μg/m3 (8) | 41.0 | |
| July 16, 2019, 1 a.m. | 45.9 ppb (42) | 23.5 ppb (22) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.59 ppb (7) | N/A | 3.0 μg/m3 (12) | 42.0 | |
| July 16, 2019, midnight | 35.0 ppb (32) | 16.9 ppb (16) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 5.0 μg/m3 (21) | 32.0 | |
| July 15, 2019, 11 p.m. | 26.9 ppb (25) | 14.5 ppb (13) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 5.0 μg/m3 (21) | 25.0 | |
| July 15, 2019, 10 p.m. | 47.6 ppb (44) | 26.3 ppb (24) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.52 ppb (6) | N/A | 5.0 μg/m3 (21) | 44.0 | |
| July 15, 2019, 9 p.m. | 46.0 ppb (43) | 30.2 ppb (28) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 5.0 μg/m3 (21) | 43.0 | |
| July 15, 2019, 8 p.m. | 58.0 ppb (54) | 36.1 ppb (33) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 6.0 μg/m3 (25) | 54.0 | |
| July 15, 2019, 7 p.m. | 74.0 ppb (71) | 52.1 ppb (48) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.56 ppb (6) | N/A | 9.0 μg/m3 (38) | 71.0 | |
| July 15, 2019, 6 p.m. | 52.1 ppb (48) | 34.8 ppb (32) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 6.0 μg/m3 (25) | 48.0 | |
| July 15, 2019, 5 p.m. | 36.7 ppb (34) | 20.6 ppb (19) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 5.0 μg/m3 (21) | 34.0 | |
| July 15, 2019, 4 p.m. | 55.0 ppb (51) | 33.1 ppb (31) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 9.0 μg/m3 (38) | 51.0 | |
| July 15, 2019, 3 p.m. | 107.0 ppb (101) | 77.5 ppb (75) | N/A | 29.0 ppb (27) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 11.0 μg/m3 (46) | 101.0 | |
| July 15, 2019, 2 p.m. | 118.7 ppb (103) | 89.2 ppb (87) | N/A | 30.0 ppb (28) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 12.0 μg/m3 (50) | 103.0 | |
| July 15, 2019, 1 p.m. | 49.0 ppb (45) | 33.7 ppb (31) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 3.0 μg/m3 (12) | 45.0 | |
| July 15, 2019, noon | 18.5 ppb (17) | 7.8 ppb (7) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.17 ppb (2) | N/A | 3.0 μg/m3 (12) | 17.0 | |
| July 15, 2019, 11 a.m. | 29.2 ppb (27) | 15.8 ppb (15) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.29 ppb (3) | N/A | 2.0 μg/m3 (8) | 27.0 | |
| July 15, 2019, 10 a.m. | 3.7 ppb (3) | 0.1 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.09 ppb (1) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 15, 2019, 9 a.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 | |
| July 15, 2019, 8 a.m. | 4.6 ppb (4) | 0.2 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.11 ppb (1) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 15, 2019, 7 a.m. | 6.1 ppb (6) | 0.7 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.12 ppb (1) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 15, 2019, 6 a.m. | 6.5 ppb (6) | 0.5 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 15, 2019, 5 a.m. | 14.1 ppb (13) | 2.7 ppb (3) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 15, 2019, 4 a.m. | 14.8 ppb (14) | 1.8 ppb (2) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.25 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 15, 2019, 3 a.m. | 21.2 ppb (20) | 5.7 ppb (5) | N/A | 16.0 ppb (15) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 15, 2019, 2 a.m. | 19.2 ppb (18) | 6.9 ppb (6) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 15, 2019, 1 a.m. | 21.2 ppb (20) | 8.1 ppb (8) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 15, 2019, midnight | 43.3 ppb (40) | 21.3 ppb (20) | N/A | 22.0 ppb (20) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 4.0 μg/m3 (17) | 40.0 | |
| July 14, 2019, 11 p.m. | 30.9 ppb (29) | 13.8 ppb (13) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 6.0 μg/m3 (25) | 29.0 | |
| July 14, 2019, 10 p.m. | 35.8 ppb (33) | 15.9 ppb (15) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.33 ppb (4) | N/A | 9.0 μg/m3 (38) | 38.0 | |
| July 14, 2019, 9 p.m. | 28.6 ppb (26) | 14.3 ppb (13) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| July 14, 2019, 8 p.m. | 27.9 ppb (26) | 15.3 ppb (14) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 6.0 μg/m3 (25) | 26.0 | |
| July 14, 2019, 7 p.m. | 26.9 ppb (25) | 16.2 ppb (15) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| July 14, 2019, 6 p.m. | 35.0 ppb (32) | 22.3 ppb (21) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| July 14, 2019, 5 p.m. | 29.9 ppb (28) | 19.7 ppb (18) | N/A | 10.0 ppb (9) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 6.0 μg/m3 (25) | 28.0 | |
| July 14, 2019, 4 p.m. | 51.5 ppb (48) | 36.2 ppb (34) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.42 ppb (5) | N/A | 4.0 μg/m3 (17) | 48.0 | |
| July 14, 2019, 3 p.m. | 42.3 ppb (39) | 28.1 ppb (26) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 3.0 μg/m3 (12) | 39.0 | |
| July 14, 2019, 2 p.m. | 33.6 ppb (31) | 21.4 ppb (20) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| July 14, 2019, 1 p.m. | 94.6 ppb (93) | 73.5 ppb (71) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 6.0 μg/m3 (25) | 93.0 | |
| July 14, 2019, noon | 29.1 ppb (27) | 17.2 ppb (16) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.27 ppb (3) | N/A | 4.0 μg/m3 (17) | 27.0 | |
| July 14, 2019, 11 a.m. | 4.7 ppb (4) | 0.6 ppb (1) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.13 ppb (1) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 14, 2019, 10 a.m. | 2.8 ppb (3) | 0.3 ppb (0) | N/A | 2.0 ppb (2) | N/A | N/A | N/A | 0.13 ppb (1) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 14, 2019, 9 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 | |
| July 14, 2019, 8 a.m. | 3.5 ppb (3) | 0.3 ppb (0) | N/A | 3.0 ppb (3) | N/A | N/A | N/A | 0.12 ppb (1) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 14, 2019, 7 a.m. | 4.9 ppb (5) | 0.5 ppb (0) | N/A | 4.0 ppb (4) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 14, 2019, 6 a.m. | 5.9 ppb (5) | 1.0 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 14, 2019, 5 a.m. | 7.2 ppb (7) | 1.0 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 14, 2019, 4 a.m. | 7.1 ppb (7) | 0.9 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 5.0 μg/m3 (21) | 21.0 | |
| July 14, 2019, 3 a.m. | 8.4 ppb (8) | 2.2 ppb (2) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 14, 2019, 2 a.m. | 11.5 ppb (11) | 3.4 ppb (3) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.23 ppb (3) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 14, 2019, 1 a.m. | 34.3 ppb (32) | 18.8 ppb (17) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 6.0 μg/m3 (25) | 32.0 | |
| July 14, 2019, midnight | 30.3 ppb (28) | 17.0 ppb (16) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.45 ppb (5) | N/A | 6.0 μg/m3 (25) | 28.0 | |
| July 13, 2019, 11 p.m. | 26.5 ppb (25) | 14.1 ppb (13) | N/A | 12.0 ppb (11) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 4.0 μg/m3 (17) | 25.0 | |
| July 13, 2019, 10 p.m. | 21.0 ppb (19) | 11.6 ppb (11) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.34 ppb (4) | N/A | 1.0 μg/m3 (4) | 19.0 | |
| July 13, 2019, 9 p.m. | 20.7 ppb (19) | 12.2 ppb (11) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.3 ppb (3) | N/A | 3.0 μg/m3 (12) | 19.0 | |
| July 13, 2019, 8 p.m. | 27.7 ppb (26) | 16.5 ppb (15) | N/A | 11.0 ppb (10) | N/A | N/A | N/A | 0.31 ppb (3) | N/A | 5.0 μg/m3 (21) | 26.0 | |
| July 13, 2019, 7 p.m. | 35.9 ppb (33) | 23.1 ppb (21) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.36 ppb (4) | N/A | 8.0 μg/m3 (33) | 33.0 | |
| July 13, 2019, 6 p.m. | 47.1 ppb (44) | 32.3 ppb (30) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.35 ppb (4) | N/A | 9.0 μg/m3 (38) | 44.0 | |
| July 13, 2019, 5 p.m. | 55.4 ppb (51) | 38.8 ppb (36) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.4 ppb (4) | N/A | 9.0 μg/m3 (38) | 51.0 | |
| July 13, 2019, 4 p.m. | 82.3 ppb (80) | 61.6 ppb (58) | N/A | 21.0 ppb (19) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 9.0 μg/m3 (38) | 80.0 | |
| July 13, 2019, 3 p.m. | 98.6 ppb (97) | 79.5 ppb (77) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.56 ppb (6) | N/A | 9.0 μg/m3 (38) | 97.0 | |
| July 13, 2019, 2 p.m. | 100.9 ppb (100) | 77.1 ppb (75) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.53 ppb (6) | N/A | 7.0 μg/m3 (29) | 100.0 | |
| July 13, 2019, 1 p.m. | 9.0 ppb (8) | 3.3 ppb (3) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 13, 2019, noon | 4.9 ppb (5) | 0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.12 ppb (1) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 13, 2019, 11 a.m. | 6.1 ppb (6) | 0.8 ppb (1) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.1 ppb (1) | N/A | -2.0 μg/m3 (0) | 6.0 | |
| July 13, 2019, 10 a.m. | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 1.0 μg/m3 (4) | 4.0 | |
| July 13, 2019, 9 a.m. | 5.0 ppb (5) | 0.3 ppb (0) | N/A | 5.0 ppb (5) | N/A | N/A | N/A | 0.12 ppb (1) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 13, 2019, 8 a.m. | 5.9 ppb (5) | 0.4 ppb (0) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.13 ppb (1) | N/A | 2.0 μg/m3 (8) | 8.0 | |
| July 13, 2019, 7 a.m. | 6.5 ppb (6) | 0.6 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.14 ppb (2) | N/A | 4.0 μg/m3 (17) | 17.0 | |
| July 13, 2019, 6 a.m. | 7.6 ppb (7) | 1.3 ppb (1) | N/A | 6.0 ppb (6) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 13, 2019, 5 a.m. | 10.3 ppb (10) | 1.8 ppb (2) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 1.0 μg/m3 (4) | 10.0 | |
| July 13, 2019, 4 a.m. | 10.5 ppb (10) | 2.0 ppb (2) | N/A | 9.0 ppb (8) | N/A | N/A | N/A | 0.22 ppb (2) | N/A | 3.0 μg/m3 (12) | 12.0 | |
| July 13, 2019, 3 a.m. | 33.7 ppb (31) | 17.0 ppb (16) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 4.0 μg/m3 (17) | 31.0 | |
| July 13, 2019, 2 a.m. | 28.6 ppb (26) | 15.7 ppb (15) | N/A | 13.0 ppb (12) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 4.0 μg/m3 (17) | 26.0 | |
| July 13, 2019, 1 a.m. | 66.7 ppb (64) | 41.1 ppb (38) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 8.0 μg/m3 (33) | 64.0 | |
| July 13, 2019, midnight | 66.3 ppb (63) | 41.5 ppb (38) | N/A | 25.0 ppb (23) | N/A | N/A | N/A | 0.48 ppb (5) | N/A | 8.0 μg/m3 (33) | 63.0 | |
| July 12, 2019, 11 p.m. | 52.4 ppb (49) | 34.2 ppb (32) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.39 ppb (4) | N/A | 6.0 μg/m3 (25) | 49.0 | |
| July 12, 2019, 10 p.m. | 47.5 ppb (44) | 32.8 ppb (30) | N/A | 15.0 ppb (14) | N/A | N/A | N/A | 0.49 ppb (5) | N/A | 3.0 μg/m3 (12) | 44.0 | |
| July 12, 2019, 9 p.m. | 44.2 ppb (41) | 30.6 ppb (28) | N/A | 14.0 ppb (13) | N/A | N/A | N/A | 0.51 ppb (6) | N/A | 6.0 μg/m3 (25) | 41.0 | |
| July 12, 2019, 8 p.m. | 57.9 ppb (54) | 41.3 ppb (38) | N/A | 17.0 ppb (16) | N/A | N/A | N/A | 0.43 ppb (5) | N/A | 9.0 μg/m3 (38) | 54.0 | |
| July 12, 2019, 7 p.m. | 75.4 ppb (73) | 57.9 ppb (54) | N/A | 18.0 ppb (17) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 11.0 μg/m3 (46) | 73.0 | |
| July 12, 2019, 6 p.m. | 84.3 ppb (82) | 64.7 ppb (61) | N/A | 20.0 ppb (19) | N/A | N/A | N/A | 0.47 ppb (5) | N/A | 13.0 μg/m3 (52) | 82.0 | |
| July 12, 2019, 5 p.m. | 93.8 ppb (92) | 74.3 ppb (72) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 10.0 μg/m3 (42) | 92.0 | |
| July 12, 2019, 4 p.m. | 104.3 ppb (101) | 81.2 ppb (79) | N/A | 23.0 ppb (21) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 9.0 μg/m3 (38) | 101.0 | |
| July 12, 2019, 3 p.m. | 107.4 ppb (101) | 88.2 ppb (86) | N/A | 19.0 ppb (18) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 10.0 μg/m3 (42) | 101.0 | |
| July 12, 2019, 2 p.m. | 15.2 ppb (14) | 6.8 ppb (6) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.16 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 12, 2019, 1 p.m. | 12.2 ppb (11) | 4.4 ppb (4) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.15 ppb (2) | N/A | 10.0 μg/m3 (42) | 42.0 | |
| July 12, 2019, noon | 13.6 ppb (13) | 5.8 ppb (5) | N/A | 8.0 ppb (7) | N/A | N/A | N/A | 0.18 ppb (2) | N/A | 6.0 μg/m3 (25) | 25.0 | |
| July 12, 2019, 11 a.m. | 77.8 ppb (75) | 54.0 ppb (50) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.41 ppb (5) | N/A | 7.0 μg/m3 (29) | 75.0 | |
| July 12, 2019, 10 a.m. | 99.7 ppb (99) | 75.7 ppb (73) | N/A | 24.0 ppb (22) | N/A | N/A | N/A | 0.38 ppb (4) | N/A | 11.0 μg/m3 (46) | 99.0 | |
| July 12, 2019, 9 a.m. | 101.8 ppb (100) | 75.6 ppb (73) | N/A | 26.0 ppb (24) | N/A | N/A | N/A | 0.44 ppb (5) | N/A | 7.0 μg/m3 (29) | 100.0 |