AQSQID: 530330080

Site Name: Seattle-Beacon Hill

Location: Seattle, WA

Reporting: True, Located: True

Current AQI: 19.0

Seattle WA, US: 47.568236, -122.308628

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2019, 1 a.m. N/A 1.4 ppb (1) 12.2 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 16.0 ppb (12) 0.21 ppb (2) N/A 4.5 μg/m3 (19) 19.0
 
Sept. 21, 2019, midnight N/A 2.6 ppb (2) 13.1 ppb (12) 11.0 ppb (10) N/A 0.0 ppb (0) 16.0 ppb (12) 0.21 ppb (2) N/A 5.1 μg/m3 (21) 21.0
 
Sept. 20, 2019, 11 p.m. N/A 3.3 ppb (3) 12.3 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
Sept. 20, 2019, 10 p.m. N/A N/A N/A 9.0 ppb (8) N/A 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 20, 2019, 9 p.m. N/A N/A N/A 10.0 ppb (9) N/A 0.0 ppb (0) 14.0 ppb (11) 0.22 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
Sept. 20, 2019, 8 p.m. N/A 6.6 ppb (6) 15.7 ppb (15) N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.19 ppb (2) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 20, 2019, 7 p.m. N/A 15.8 ppb (15) 26.2 ppb (24) N/A N/A 1.0 ppb (1) 9.0 ppb (7) N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 20, 2019, 6 p.m. N/A N/A N/A 16.0 ppb (15) N/A 1.0 ppb (1) 7.0 ppb (5) 0.23 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
Sept. 20, 2019, 5 p.m. N/A 14.6 ppb (14) 24.4 ppb (23) 11.0 ppb (10) N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 3.6 μg/m3 (15) 23.0
 
Sept. 20, 2019, 4 p.m. N/A 4.0 ppb (4) 14.1 ppb (13) 11.0 ppb (10) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 4.2 μg/m3 (18) 18.0
 
Sept. 20, 2019, 3 p.m. N/A 2.5 ppb (2) 10.0 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 9.0 ppb (7) 0.22 ppb (2) N/A 2.6 μg/m3 (11) 11.0
 
Sept. 20, 2019, 2 p.m. N/A 0.8 ppb (1) 4.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 13.0 ppb (10) 0.19 ppb (2) N/A 1.5 μg/m3 (6) 10.0
 
Sept. 20, 2019, 1 p.m. N/A 0.3 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 15.0 ppb (12) 0.18 ppb (2) N/A 1.9 μg/m3 (8) 12.0
 
Sept. 20, 2019, noon N/A 0.3 ppb (0) 3.6 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 15.0 ppb (12) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2019, 11 a.m. N/A 0.5 ppb (0) 7.3 ppb (7) N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.17 ppb (2) N/A 5.7 μg/m3 (24) 24.0
 
Sept. 20, 2019, 10 a.m. N/A 11.3 ppb (10) 27.4 ppb (25) 17.0 ppb (16) N/A 1.0 ppb (1) N/A 0.18 ppb (2) N/A 7.7 μg/m3 (32) 32.0
 
Sept. 20, 2019, 9 a.m. N/A 10.4 ppb (10) 28.3 ppb (26) 19.0 ppb (18) N/A 0.0 ppb (0) 4.0 ppb (3) 0.22 ppb (2) N/A 5.5 μg/m3 (23) 26.0
 
Sept. 20, 2019, 8 a.m. N/A 1.1 ppb (1) 16.1 ppb (15) 16.0 ppb (15) N/A 0.0 ppb (0) 7.0 ppb (5) 0.23 ppb (3) N/A 8.9 μg/m3 (37) 37.0
 
Sept. 20, 2019, 7 a.m. N/A 23.3 ppb (22) 45.5 ppb (42) 23.0 ppb (21) N/A N/A 1.0 ppb (1) 0.26 ppb (3) N/A 13.3 μg/m3 (53) 53.0
 
Sept. 20, 2019, 6 a.m. N/A 21.9 ppb (20) 43.0 ppb (40) 23.0 ppb (21) N/A N/A 3.0 ppb (2) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 40.0
 
Sept. 20, 2019, 5 a.m. N/A 8.7 ppb (8) 25.9 ppb (24) 17.0 ppb (16) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2019, 4 a.m. N/A 42.7 ppb (40) 68.9 ppb (66) 28.0 ppb (26) N/A 1.0 ppb (1) 1.0 ppb (1) 0.24 ppb (3) N/A 6.1 μg/m3 (25) 66.0
 
Sept. 20, 2019, 3 a.m. N/A 17.5 ppb (16) 44.7 ppb (41) 30.0 ppb (28) N/A 1.0 ppb (1) 4.0 ppb (3) 0.21 ppb (2) N/A 2.6 μg/m3 (11) 41.0
 
Sept. 20, 2019, 2 a.m. N/A 0.1 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.16 ppb (2) N/A 3.9 μg/m3 (16) 19.0
 
Sept. 20, 2019, 1 a.m. N/A 0.2 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) 0.15 ppb (2) N/A 1.7 μg/m3 (7) 22.0
 
Sept. 20, 2019, midnight N/A 0.6 ppb (1) 4.5 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A 2.1 μg/m3 (9) 25.0
 
Sept. 19, 2019, 11 p.m. N/A 2.3 ppb (2) 10.3 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (22) 0.18 ppb (2) N/A 4.5 μg/m3 (19) 22.0
 
Sept. 19, 2019, 10 p.m. N/A 3.8 ppb (4) 13.5 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 26.0 ppb (20) 0.17 ppb (2) N/A 3.4 μg/m3 (14) 20.0
 
Sept. 19, 2019, 9 p.m. N/A 6.9 ppb (6) 18.0 ppb (17) 12.0 ppb (11) N/A 1.0 ppb (1) 24.0 ppb (18) 0.17 ppb (2) N/A 5.8 μg/m3 (24) 24.0
 
Sept. 19, 2019, 8 p.m. N/A 9.2 ppb (9) 22.1 ppb (20) 13.0 ppb (12) N/A 1.0 ppb (1) 20.0 ppb (15) 0.21 ppb (2) N/A 11.3 μg/m3 (47) 47.0
 
Sept. 19, 2019, 7 p.m. N/A N/A N/A 22.0 ppb (20) N/A 1.0 ppb (1) 11.0 ppb (8) 0.27 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 19, 2019, 6 p.m. N/A N/A N/A 15.0 ppb (14) N/A 1.0 ppb (1) 16.0 ppb (12) 0.28 ppb (3) N/A 14.3 μg/m3 (55) 55.0
 
Sept. 19, 2019, 5 p.m. N/A 38.4 ppb (36) 61.4 ppb (58) 23.0 ppb (21) N/A 2.0 ppb (3) 7.0 ppb (5) 0.44 ppb (5) N/A 10.0 μg/m3 (42) 58.0
 
Sept. 19, 2019, 4 p.m. N/A 37.3 ppb (35) 59.0 ppb (55) 22.0 ppb (20) N/A 2.0 ppb (3) 4.0 ppb (3) 0.49 ppb (5) N/A 8.8 μg/m3 (37) 55.0
 
Sept. 19, 2019, 3 p.m. N/A 45.3 ppb (42) 59.6 ppb (56) 15.0 ppb (14) N/A N/A 2.0 ppb (2) 0.48 ppb (5) N/A 5.3 μg/m3 (22) 56.0
 
Sept. 19, 2019, 2 p.m. N/A 26.1 ppb (24) 36.0 ppb (33) 10.0 ppb (9) N/A 1.0 ppb (1) 2.0 ppb (2) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 33.0
 
Sept. 19, 2019, 1 p.m. N/A 6.1 ppb (6) 14.3 ppb (13) 9.0 ppb (8) N/A 0.0 ppb (0) 2.0 ppb (2) 0.28 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
Sept. 19, 2019, noon N/A 13.9 ppb (13) 28.7 ppb (27) 15.0 ppb (14) N/A 0.0 ppb (0) 1.0 ppb (1) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 11 a.m. N/A 12.0 ppb (11) 29.6 ppb (27) 19.0 ppb (18) N/A 0.0 ppb (0) 1.0 ppb (1) 0.27 ppb (3) N/A 4.4 μg/m3 (18) 27.0
 
Sept. 19, 2019, 10 a.m. N/A 6.5 ppb (6) 18.6 ppb (17) 13.0 ppb (12) N/A 0.0 ppb (0) 2.0 ppb (2) 0.22 ppb (2) N/A 3.5 μg/m3 (15) 17.0
 
Sept. 19, 2019, 9 a.m. N/A 0.8 ppb (1) 12.5 ppb (12) 11.0 ppb (10) N/A 0.0 ppb (0) 12.0 ppb (9) 0.19 ppb (2) N/A 3.1 μg/m3 (13) 13.0
 
Sept. 19, 2019, 8 a.m. N/A 5.4 ppb (5) 28.9 ppb (27) 25.0 ppb (23) N/A 0.0 ppb (0) 4.0 ppb (3) 0.18 ppb (2) N/A 5.8 μg/m3 (24) 27.0
 
Sept. 19, 2019, 7 a.m. N/A 10.2 ppb (9) 37.0 ppb (34) 29.0 ppb (27) N/A 0.0 ppb (0) 2.0 ppb (2) 0.21 ppb (2) N/A 3.2 μg/m3 (13) 34.0
 
Sept. 19, 2019, 6 a.m. N/A 1.8 ppb (2) 13.9 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 19.0 ppb (15) 0.21 ppb (2) N/A 2.9 μg/m3 (12) 15.0
 
Sept. 19, 2019, 5 a.m. N/A 0.6 ppb (1) 14.8 ppb (14) 15.0 ppb (14) N/A 0.0 ppb (0) 16.0 ppb (12) 0.24 ppb (3) N/A 3.5 μg/m3 (15) 15.0
 
Sept. 19, 2019, 4 a.m. N/A 1.8 ppb (2) 15.9 ppb (15) 15.0 ppb (14) N/A 0.0 ppb (0) 16.0 ppb (12) 0.35 ppb (4) N/A 4.2 μg/m3 (18) 18.0
 
Sept. 19, 2019, 3 a.m. N/A 0.5 ppb (0) 11.9 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 19.0 ppb (15) 0.25 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
Sept. 19, 2019, 2 a.m. N/A 0.2 ppb (0) 7.9 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) 0.2 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
Sept. 19, 2019, 1 a.m. N/A 0.9 ppb (1) 7.5 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 17.0
 
Sept. 19, 2019, midnight N/A 1.5 ppb (1) 6.5 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.2 ppb (2) N/A 0.0 μg/m3 (0) 20.0
 
Sept. 18, 2019, 11 p.m. N/A 1.4 ppb (1) 5.2 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.12 ppb (1) N/A 0.0 μg/m3 (0) 25.0
 
Sept. 18, 2019, 6 p.m. N/A N/A N/A 12.0 ppb (11) N/A 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 4.3 μg/m3 (18) 18.0
 
Sept. 18, 2019, 5 p.m. N/A 6.6 ppb (6) 19.5 ppb (18) 12.0 ppb (11) N/A 0.0 ppb (0) 18.0 ppb (14) 0.16 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 18, 2019, 4 p.m. N/A 19.6 ppb (18) 38.1 ppb (35) 19.0 ppb (18) N/A 1.0 ppb (1) 9.0 ppb (7) 0.22 ppb (2) N/A 4.9 μg/m3 (20) 35.0
 
Sept. 18, 2019, 3 p.m. N/A 14.6 ppb (14) 32.9 ppb (30) 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (6) 0.27 ppb (3) N/A 4.7 μg/m3 (20) 30.0
 
Sept. 18, 2019, 2 p.m. N/A 16.9 ppb (16) 37.9 ppb (35) 23.0 ppb (21) N/A 1.0 ppb (1) 3.0 ppb (2) 0.37 ppb (4) N/A 3.0 μg/m3 (12) 35.0
 
Sept. 18, 2019, 1 p.m. N/A 2.4 ppb (2) 15.3 ppb (14) 15.0 ppb (14) N/A 0.0 ppb (0) 8.0 ppb (6) 0.24 ppb (3) N/A 1.9 μg/m3 (8) 14.0
 
Sept. 18, 2019, noon N/A 0.2 ppb (0) 7.2 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (13) 0.18 ppb (2) N/A 0.8 μg/m3 (3) 13.0
 
Sept. 18, 2019, 11 a.m. N/A 0.3 ppb (0) 6.9 ppb (6) N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.16 ppb (2) N/A 2.6 μg/m3 (11) 11.0
 
Sept. 18, 2019, 10 a.m. N/A 0.1 ppb (0) 3.5 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 3.2 μg/m3 (13) 13.0
 
Sept. 18, 2019, 9 a.m. N/A 0.1 ppb (0) 3.7 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.14 ppb (2) N/A 2.2 μg/m3 (9) 17.0
 
Sept. 18, 2019, 8 a.m. N/A 0.3 ppb (0) 8.7 ppb (8) 10.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (15) 0.15 ppb (2) N/A 2.6 μg/m3 (11) 15.0
 
Sept. 18, 2019, 7 a.m. N/A 0.2 ppb (0) 3.4 ppb (3) 4.0 ppb (4) N/A N/A 21.0 ppb (16) 0.15 ppb (2) N/A 0.7 μg/m3 (3) 16.0
 
Sept. 18, 2019, 6 a.m. N/A 0.1 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.15 ppb (2) N/A 2.1 μg/m3 (9) 15.0
 
Sept. 18, 2019, 5 a.m. N/A 0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 2.0 μg/m3 (8) 16.0
 
Sept. 18, 2019, 4 a.m. N/A 0.4 ppb (0) 5.8 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.22 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
Sept. 18, 2019, 3 a.m. N/A 0.5 ppb (0) 11.2 ppb (10) 12.0 ppb (11) N/A 0.0 ppb (0) 19.0 ppb (15) 0.21 ppb (2) N/A 3.1 μg/m3 (13) 15.0
 
Sept. 18, 2019, 2 a.m. N/A 0.7 ppb (1) 10.6 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 17.0 ppb (13) 0.21 ppb (2) N/A 1.7 μg/m3 (7) 13.0
 
Sept. 18, 2019, 1 a.m. N/A 0.7 ppb (1) 6.6 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) 0.2 ppb (2) N/A 2.5 μg/m3 (10) 16.0
 
Sept. 18, 2019, midnight N/A 1.1 ppb (1) 10.7 ppb (10) 11.0 ppb (10) N/A 1.0 ppb (1) 16.0 ppb (12) 0.22 ppb (2) N/A 2.9 μg/m3 (12) 12.0
 
Sept. 17, 2019, 11 p.m. N/A 2.4 ppb (2) 11.6 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (12) 0.25 ppb (3) N/A 4.4 μg/m3 (18) 18.0
 
Sept. 17, 2019, 10 p.m. N/A 3.6 ppb (3) 13.2 ppb (12) 11.0 ppb (10) N/A 0.0 ppb (0) 17.0 ppb (13) 0.23 ppb (3) N/A 1.8 μg/m3 (8) 13.0
 
Sept. 17, 2019, 9 p.m. N/A 3.2 ppb (3) 10.9 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 15.0 ppb (12) 0.22 ppb (2) N/A 2.1 μg/m3 (9) 12.0
 
Sept. 17, 2019, 8 p.m. N/A 2.7 ppb (3) 8.9 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (13) 0.22 ppb (2) N/A 3.1 μg/m3 (13) 13.0
 
Sept. 17, 2019, 7 p.m. N/A N/A N/A 11.0 ppb (10) N/A 0.0 ppb (0) 14.0 ppb (11) 0.23 ppb (3) N/A 2.6 μg/m3 (11) 11.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 13.0 ppb (10) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 10.0
 
Sept. 17, 2019, 5 p.m. N/A 1.6 ppb (1) 5.8 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 0.0 μg/m3 (0) 5.0
 
Sept. 17, 2019, 4 p.m. N/A 1.3 ppb (1) 5.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 12.0 ppb (9) 0.18 ppb (2) N/A N/A 9.0
 
Sept. 17, 2019, 3 p.m. N/A 1.3 ppb (1) 8.5 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 11.0 ppb (8) 0.21 ppb (2) N/A 3.1 μg/m3 (13) 13.0
 
Sept. 17, 2019, 2 p.m. N/A 1.3 ppb (1) 10.3 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 10.0 ppb (8) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 10.0
 
Sept. 17, 2019, 1 p.m. N/A 1.8 ppb (2) 9.4 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 10.0 ppb (8) 0.19 ppb (2) N/A 2.6 μg/m3 (11) 11.0
 
Sept. 17, 2019, noon N/A 0.6 ppb (1) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 14.0 ppb (11) 0.16 ppb (2) N/A 2.6 μg/m3 (11) 11.0
 
Sept. 17, 2019, 11 a.m. N/A 0.2 ppb (0) 3.7 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 12.0
 
Sept. 17, 2019, 10 a.m. N/A 0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
Sept. 17, 2019, 9 a.m. N/A 0.3 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (12) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 12.0
 
Sept. 17, 2019, 8 a.m. N/A 1.3 ppb (1) 9.9 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 10.0 ppb (8) 0.17 ppb (2) N/A 2.5 μg/m3 (10) 10.0
 
Sept. 17, 2019, 7 a.m. N/A 1.6 ppb (1) 12.5 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 7.0 ppb (5) 0.2 ppb (2) N/A 3.6 μg/m3 (15) 15.0
 
Sept. 17, 2019, 6 a.m. N/A 1.2 ppb (1) 12.6 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 9.0 ppb (7) 0.21 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
Sept. 17, 2019, 5 a.m. N/A 0.7 ppb (1) 13.0 ppb (12) 13.0 ppb (12) N/A 0.0 ppb (0) 10.0 ppb (8) 0.24 ppb (3) N/A 3.8 μg/m3 (16) 16.0
 
Sept. 17, 2019, 4 a.m. N/A 0.9 ppb (1) 13.6 ppb (13) 14.0 ppb (13) N/A 0.0 ppb (0) 13.0 ppb (10) 0.23 ppb (3) N/A 3.9 μg/m3 (16) 16.0
 
Sept. 17, 2019, 3 a.m. N/A 1.0 ppb (1) 13.0 ppb (12) 14.0 ppb (13) N/A 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) N/A 2.8 μg/m3 (12) 13.0
 
Sept. 17, 2019, 2 a.m. N/A 0.6 ppb (1) 9.2 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.19 ppb (2) N/A 2.5 μg/m3 (10) 15.0
 
Sept. 17, 2019, 1 a.m. N/A 1.1 ppb (1) 8.2 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 22.0 ppb (17) 0.19 ppb (2) N/A 2.7 μg/m3 (11) 17.0
 
Sept. 17, 2019, midnight N/A 0.6 ppb (1) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 2.5 μg/m3 (10) 23.0
 
Sept. 16, 2019, 11 p.m. N/A 0.8 ppb (1) 3.5 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A 3.3 μg/m3 (14) 25.0
 
Sept. 16, 2019, 10 p.m. N/A 0.7 ppb (1) 3.1 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 25.0
 
Sept. 16, 2019, 9 p.m. N/A 0.8 ppb (1) 3.1 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 3.7 μg/m3 (15) 24.0
 
Sept. 16, 2019, 8 p.m. N/A 1.1 ppb (1) 3.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.14 ppb (2) N/A 1.7 μg/m3 (7) 22.0
 
Sept. 16, 2019, 7 p.m. N/A 2.2 ppb (2) 5.1 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (18) 0.16 ppb (2) N/A 2.3 μg/m3 (10) 18.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (15) 0.17 ppb (2) N/A 0.4 μg/m3 (2) 15.0
 
Sept. 16, 2019, 5 p.m. N/A 10.8 ppb (10) 20.6 ppb (19) 10.0 ppb (9) N/A 1.0 ppb (1) 13.0 ppb (10) 0.25 ppb (3) N/A 5.3 μg/m3 (22) 22.0
 
Sept. 16, 2019, 4 p.m. N/A 15.0 ppb (14) 28.4 ppb (26) 14.0 ppb (13) N/A 1.0 ppb (1) 7.0 ppb (5) 0.29 ppb (3) N/A 5.2 μg/m3 (22) 26.0
 
Sept. 16, 2019, 3 p.m. N/A 12.8 ppb (12) 26.8 ppb (25) 15.0 ppb (14) N/A 0.0 ppb (0) 5.0 ppb (4) 0.29 ppb (3) N/A 5.6 μg/m3 (23) 25.0
 
Sept. 16, 2019, 2 p.m. N/A 8.8 ppb (8) 22.0 ppb (20) 14.0 ppb (13) N/A 0.0 ppb (0) 5.0 ppb (4) 0.27 ppb (3) N/A 3.8 μg/m3 (16) 20.0
 
Sept. 16, 2019, 1 p.m. N/A 8.3 ppb (8) 21.9 ppb (20) 14.0 ppb (13) N/A 0.0 ppb (0) 4.0 ppb (3) 0.27 ppb (3) N/A 3.7 μg/m3 (15) 20.0
 
Sept. 16, 2019, noon N/A 0.7 ppb (1) 10.1 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 10.0 ppb (8) 0.23 ppb (3) N/A 3.4 μg/m3 (14) 14.0
 
Sept. 16, 2019, 11 a.m. N/A 0.7 ppb (1) 12.0 ppb (11) N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
Sept. 16, 2019, 10 a.m. N/A 0.3 ppb (0) 10.3 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
Sept. 16, 2019, 9 a.m. N/A 0.5 ppb (0) 11.6 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 10.0 ppb (8) 0.2 ppb (2) N/A 4.5 μg/m3 (19) 19.0
 
Sept. 16, 2019, 8 a.m. N/A 0.4 ppb (0) 7.6 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.15 ppb (2) N/A 2.5 μg/m3 (10) 12.0
 
Sept. 16, 2019, 7 a.m. N/A 0.2 ppb (0) 7.2 ppb (7) 8.0 ppb (7) N/A N/A 18.0 ppb (14) 0.16 ppb (2) N/A 2.6 μg/m3 (11) 14.0
 
Sept. 16, 2019, 6 a.m. N/A 0.3 ppb (0) 10.4 ppb (10) 11.0 ppb (10) N/A N/A 16.0 ppb (12) 0.17 ppb (2) N/A 2.6 μg/m3 (11) 12.0
 
Sept. 16, 2019, 5 a.m. N/A 0.2 ppb (0) 6.8 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 3.0 μg/m3 (12) 16.0
 
Sept. 16, 2019, 4 a.m. N/A 0.4 ppb (0) 8.4 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (15) 0.19 ppb (2) N/A 3.4 μg/m3 (14) 15.0
 
Sept. 16, 2019, 3 a.m. N/A 0.1 ppb (0) 8.3 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) N/A 3.8 μg/m3 (16) 16.0
 
Sept. 16, 2019, 2 a.m. N/A 0.5 ppb (0) 7.9 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 22.0 ppb (17) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 17.0
 
Sept. 16, 2019, 1 a.m. N/A 0.4 ppb (0) 5.5 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) 0.18 ppb (2) N/A 1.8 μg/m3 (8) 18.0
 
Sept. 16, 2019, midnight N/A 0.6 ppb (1) 3.7 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.18 ppb (2) N/A 3.1 μg/m3 (13) 22.0
 
Sept. 15, 2019, 11 p.m. N/A 0.5 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 23.0
 
Sept. 15, 2019, 10 p.m. N/A 0.8 ppb (1) 4.5 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.16 ppb (2) N/A 2.9 μg/m3 (12) 24.0
 
Sept. 15, 2019, 9 p.m. N/A 0.9 ppb (1) 5.8 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) N/A 2.5 μg/m3 (10) 25.0
 
Sept. 15, 2019, 8 p.m. N/A 1.2 ppb (1) 7.5 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.19 ppb (2) N/A 2.2 μg/m3 (9) 23.0
 
Sept. 15, 2019, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) 0.2 ppb (2) N/A 2.5 μg/m3 (10) 22.0
 
Sept. 15, 2019, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A 1.2 μg/m3 (5) 19.0
 
Sept. 15, 2019, 5 p.m. N/A 0.6 ppb (1) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.17 ppb (2) N/A 0.6 μg/m3 (2) 19.0
 
Sept. 15, 2019, 4 p.m. N/A 1.5 ppb (1) 9.8 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.21 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
Sept. 15, 2019, 3 p.m. N/A 1.1 ppb (1) 8.5 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.17 ppb (2) N/A 1.5 μg/m3 (6) 15.0
 
Sept. 15, 2019, 2 p.m. N/A 0.4 ppb (0) 8.7 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (15) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 15.0
 
Sept. 15, 2019, 1 p.m. N/A 0.4 ppb (0) 5.4 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 17.0
 
Sept. 15, 2019, noon N/A 0.4 ppb (0) 5.9 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.17 ppb (2) N/A 1.4 μg/m3 (6) 15.0
 
Sept. 15, 2019, 11 a.m. N/A 0.3 ppb (0) 5.6 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.14 ppb (2) N/A 3.6 μg/m3 (15) 17.0
 
Sept. 15, 2019, 10 a.m. N/A 0.1 ppb (0) 4.3 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 18.0
 
Sept. 15, 2019, 9 a.m. N/A 0.4 ppb (0) 5.2 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 21.0 ppb (16) 0.17 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
Sept. 15, 2019, 8 a.m. N/A 0.5 ppb (0) 5.6 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.17 ppb (2) N/A 3.4 μg/m3 (14) 15.0
 
Sept. 15, 2019, 7 a.m. N/A 0.2 ppb (0) 5.4 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) N/A 2.4 μg/m3 (10) 15.0
 
Sept. 15, 2019, 6 a.m. N/A 0.2 ppb (0) 5.6 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.19 ppb (2) N/A 1.9 μg/m3 (8) 15.0
 
Sept. 15, 2019, 5 a.m. N/A 0.3 ppb (0) 9.1 ppb (8) 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) N/A 2.3 μg/m3 (10) 15.0
 
Sept. 15, 2019, 4 a.m. N/A 0.2 ppb (0) 5.1 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.17 ppb (2) N/A 3.3 μg/m3 (14) 20.0
 
Sept. 15, 2019, 3 a.m. N/A 0.2 ppb (0) 3.9 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 4.5 μg/m3 (19) 23.0
 
Sept. 15, 2019, 2 a.m. N/A 0.2 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A 3.5 μg/m3 (15) 23.0
 
Sept. 15, 2019, 1 a.m. N/A 0.2 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) N/A 3.8 μg/m3 (16) 22.0
 
Sept. 15, 2019, midnight N/A 0.2 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 2.7 μg/m3 (11) 22.0
 
Sept. 14, 2019, 11 p.m. N/A 0.4 ppb (0) 3.5 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) 0.17 ppb (2) N/A 2.6 μg/m3 (11) 22.0
 
Sept. 14, 2019, 10 p.m. N/A 0.7 ppb (1) 4.5 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A 3.5 μg/m3 (15) 20.0
 
Sept. 14, 2019, 9 p.m. N/A 1.0 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.17 ppb (2) N/A 2.6 μg/m3 (11) 18.0
 
Sept. 14, 2019, 8 p.m. N/A 1.1 ppb (1) 5.1 ppb (5) 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.16 ppb (2) N/A 2.8 μg/m3 (12) 18.0
 
Sept. 14, 2019, 7 p.m. N/A 0.9 ppb (1) 3.9 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) N/A 1.1 μg/m3 (5) 19.0
 
Sept. 14, 2019, 6 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.18 ppb (2) N/A 3.1 μg/m3 (13) 17.0
 
Sept. 14, 2019, 5 p.m. N/A 1.5 ppb (1) 7.9 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.17 ppb (2) N/A 1.5 μg/m3 (6) 17.0
 
Sept. 14, 2019, 4 p.m. N/A 1.4 ppb (1) 8.2 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) 0.18 ppb (2) N/A 1.4 μg/m3 (6) 16.0
 
Sept. 14, 2019, 3 p.m. N/A 1.7 ppb (2) 11.0 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 18.0 ppb (14) 0.19 ppb (2) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 14, 2019, 2 p.m. N/A 1.1 ppb (1) 10.5 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 17.0 ppb (13) 0.18 ppb (2) N/A 2.3 μg/m3 (10) 13.0
 
Sept. 14, 2019, 1 p.m. N/A 0.4 ppb (0) 6.1 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.15 ppb (2) N/A 1.5 μg/m3 (6) 17.0
 
Sept. 14, 2019, noon N/A 0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.14 ppb (2) N/A 0.6 μg/m3 (2) 18.0
 
Sept. 14, 2019, 11 a.m. N/A 0.1 ppb (0) 3.3 ppb (3) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A 0.4 μg/m3 (2) 19.0
 
Sept. 14, 2019, 10 a.m. N/A 0.1 ppb (0) 5.6 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
Sept. 14, 2019, 9 a.m. N/A 0.2 ppb (0) 7.8 ppb (7) 9.0 ppb (8) N/A 0.0 ppb (0) 21.0 ppb (16) 0.14 ppb (2) N/A 1.1 μg/m3 (5) 16.0
 
Sept. 14, 2019, 8 a.m. N/A 0.1 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.14 ppb (2) N/A 1.3 μg/m3 (5) 18.0
 
Sept. 14, 2019, 7 a.m. N/A 0.3 ppb (0) 4.7 ppb (4) 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 17.0
 
Sept. 14, 2019, 6 a.m. N/A 0.1 ppb (0) 2.5 ppb (2) 3.0 ppb (3) N/A N/A 26.0 ppb (20) 0.14 ppb (2) N/A 4.2 μg/m3 (18) 20.0
 
Sept. 14, 2019, 5 a.m. N/A 0.1 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
Sept. 14, 2019, 4 a.m. N/A 0.2 ppb (0) 2.4 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) N/A 1.1 μg/m3 (5) 21.0
 
Sept. 14, 2019, 3 a.m. N/A 0.2 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) N/A 1.9 μg/m3 (8) 21.0
 
Sept. 14, 2019, 2 a.m. N/A 0.2 ppb (0) 3.2 ppb (3) 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.15 ppb (2) N/A 1.7 μg/m3 (7) 20.0
 
Sept. 14, 2019, 1 a.m. N/A 0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A N/A 28.0 ppb (22) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 22.0
 
Sept. 14, 2019, midnight N/A 0.3 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 23.0
 
Sept. 13, 2019, 11 p.m. N/A 0.8 ppb (1) 3.5 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A 3.2 μg/m3 (13) 23.0
 
Sept. 13, 2019, 10 p.m. N/A 0.9 ppb (1) 4.2 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 2.9 μg/m3 (12) 23.0