AQSQID: 410670005

Site Name: Portland Near Road

Location: Tualatin, OR

Reporting: True, Located: True

Current AQI: 18.0

Tualatin OR, US: 45.39916, -122.7455

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2019, 6 p.m. 15.8 ppb (15) 9.8 ppb (9) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) N/A N/A 4.3 μg/m3 (18) 18.0
 
Sept. 21, 2019, 5 p.m. 17.5 ppb (16) 11.6 ppb (11) N/A 6.0 ppb (6) N/A N/A 10.0 ppb (8) N/A N/A 7.3 μg/m3 (30) 30.0
 
Sept. 21, 2019, 4 p.m. 40.1 ppb (37) 34.3 ppb (32) N/A 6.0 ppb (6) N/A N/A 3.0 ppb (2) N/A N/A 8.7 μg/m3 (36) 37.0
 
Sept. 21, 2019, 3 p.m. 48.5 ppb (45) 42.9 ppb (40) N/A 6.0 ppb (6) N/A N/A 1.0 ppb (1) N/A N/A 8.2 μg/m3 (34) 45.0
 
Sept. 21, 2019, 2 p.m. 52.5 ppb (49) 47.7 ppb (44) N/A 5.0 ppb (5) N/A N/A 1.0 ppb (1) N/A N/A 8.3 μg/m3 (35) 49.0
 
Sept. 21, 2019, 1 p.m. 34.2 ppb (32) 30.3 ppb (28) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 8.4 μg/m3 (35) 35.0
 
Sept. 21, 2019, noon 37.2 ppb (34) 33.6 ppb (31) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 7.6 μg/m3 (32) 34.0
 
Sept. 21, 2019, 11 a.m. 18.3 ppb (17) 14.2 ppb (13) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 21, 2019, 10 a.m. 13.3 ppb (12) 8.9 ppb (8) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 7.6 μg/m3 (32) 32.0
 
Sept. 21, 2019, 9 a.m. 21.2 ppb (20) 16.3 ppb (15) N/A 5.0 ppb (5) N/A N/A 1.0 ppb (1) N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 21, 2019, 8 a.m. 20.8 ppb (19) 14.8 ppb (14) N/A 6.0 ppb (6) N/A N/A 1.0 ppb (1) N/A N/A 9.8 μg/m3 (41) 41.0
 
Sept. 21, 2019, 7 a.m. 31.4 ppb (29) 22.6 ppb (21) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) N/A N/A 8.7 μg/m3 (36) 36.0
 
Sept. 21, 2019, 6 a.m. 22.6 ppb (21) 11.1 ppb (10) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) N/A N/A 8.3 μg/m3 (35) 35.0
 
Sept. 21, 2019, 5 a.m. 20.5 ppb (19) 10.9 ppb (10) N/A 10.0 ppb (9) N/A N/A 3.0 ppb (2) N/A N/A 7.1 μg/m3 (30) 30.0
 
Sept. 21, 2019, 4 a.m. 15.5 ppb (14) 5.4 ppb (5) N/A 10.0 ppb (9) N/A N/A 6.0 ppb (5) N/A N/A 6.3 μg/m3 (26) 26.0
 
Sept. 21, 2019, 3 a.m. 9.4 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 6.1 μg/m3 (25) 25.0
 
Sept. 21, 2019, 2 a.m. 6.9 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 12.0 ppb (9) N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 21, 2019, 1 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) N/A N/A 4.7 μg/m3 (20) 20.0
 
Sept. 21, 2019, midnight 4.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) N/A N/A 4.8 μg/m3 (20) 20.0
 
Sept. 20, 2019, 11 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A N/A 5.1 μg/m3 (21) 21.0
 
Sept. 20, 2019, 10 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A N/A 4.6 μg/m3 (19) 19.0
 
Sept. 20, 2019, 9 p.m. 5.4 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) N/A N/A 4.8 μg/m3 (20) 20.0
 
Sept. 20, 2019, 8 p.m. 6.5 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (12) N/A N/A 4.9 μg/m3 (20) 20.0
 
Sept. 20, 2019, 7 p.m. 7.4 ppb (7) 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (12) N/A N/A 4.9 μg/m3 (20) 20.0
 
Sept. 20, 2019, 6 p.m. 35.2 ppb (33) 23.7 ppb (22) N/A 12.0 ppb (11) N/A N/A 9.0 ppb (7) N/A N/A 6.9 μg/m3 (29) 33.0
 
Sept. 20, 2019, 5 p.m. 19.5 ppb (18) 10.5 ppb (10) N/A 9.0 ppb (8) N/A N/A 9.0 ppb (7) N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2019, 4 p.m. 31.5 ppb (29) 19.7 ppb (18) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) N/A N/A 6.8 μg/m3 (28) 29.0
 
Sept. 20, 2019, 3 p.m. 28.4 ppb (26) 19.5 ppb (18) N/A 9.0 ppb (8) N/A N/A 2.0 ppb (2) N/A N/A 7.7 μg/m3 (32) 32.0
 
Sept. 20, 2019, 2 p.m. 15.8 ppb (15) 8.5 ppb (8) N/A 7.0 ppb (6) N/A N/A 1.0 ppb (1) N/A N/A 7.1 μg/m3 (30) 30.0
 
Sept. 20, 2019, 1 p.m. 27.3 ppb (25) 18.5 ppb (17) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) N/A N/A 7.5 μg/m3 (31) 31.0
 
Sept. 20, 2019, noon 13.8 ppb (13) 7.6 ppb (7) N/A 6.0 ppb (6) N/A N/A 3.0 ppb (2) N/A N/A 7.4 μg/m3 (31) 31.0
 
Sept. 20, 2019, 11 a.m. 9.9 ppb (9) 4.4 ppb (4) N/A 6.0 ppb (6) N/A N/A 3.0 ppb (2) N/A N/A 7.2 μg/m3 (30) 30.0
 
Sept. 20, 2019, 10 a.m. 6.1 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 5.0 ppb (4) N/A N/A 6.9 μg/m3 (29) 29.0
 
Sept. 20, 2019, 9 a.m. 5.2 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 4.0 ppb (3) N/A N/A 6.8 μg/m3 (28) 28.0
 
Sept. 20, 2019, 8 a.m. 8.5 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 4.0 ppb (3) N/A N/A 6.8 μg/m3 (28) 28.0
 
Sept. 20, 2019, 7 a.m. 13.9 ppb (13) 5.5 ppb (5) N/A 8.0 ppb (7) N/A N/A 3.0 ppb (2) N/A N/A 7.2 μg/m3 (30) 30.0
 
Sept. 20, 2019, 6 a.m. 14.2 ppb (13) 3.3 ppb (3) N/A 11.0 ppb (10) N/A N/A 6.0 ppb (5) N/A N/A 7.1 μg/m3 (30) 30.0
 
Sept. 20, 2019, 5 a.m. 17.6 ppb (16) 4.3 ppb (4) N/A 13.0 ppb (12) N/A N/A 5.0 ppb (4) N/A N/A 8.9 μg/m3 (37) 37.0
 
Sept. 20, 2019, 4 a.m. 32.0 ppb (30) 12.5 ppb (12) N/A 19.0 ppb (18) N/A N/A 6.0 ppb (5) N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 20, 2019, 3 a.m. 16.0 ppb (15) 4.1 ppb (4) N/A 12.0 ppb (11) N/A N/A 15.0 ppb (12) N/A N/A 7.3 μg/m3 (30) 30.0
 
Sept. 20, 2019, 2 a.m. 10.4 ppb (10) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A 21.0 ppb (16) N/A N/A 7.3 μg/m3 (30) 30.0
 
Sept. 20, 2019, 1 a.m. 8.2 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) N/A N/A 5.6 μg/m3 (23) 23.0
 
Sept. 20, 2019, midnight 14.3 ppb (13) 6.1 ppb (6) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) N/A N/A 4.6 μg/m3 (19) 19.0
 
Sept. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 4.6 μg/m3 (19) 19.0
 
Sept. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 4.8 μg/m3 (20) 20.0
 
Sept. 19, 2019, 9 p.m. 17.5 ppb (16) 9.9 ppb (9) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 19, 2019, 8 p.m. 29.5 ppb (27) 17.9 ppb (17) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) N/A N/A 5.9 μg/m3 (25) 27.0
 
Sept. 19, 2019, 7 p.m. 36.8 ppb (34) 24.5 ppb (23) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) N/A N/A 6.2 μg/m3 (26) 34.0
 
Sept. 19, 2019, 6 p.m. 51.5 ppb (48) 36.3 ppb (34) N/A 15.0 ppb (14) N/A N/A 12.0 ppb (9) N/A N/A 6.5 μg/m3 (27) 48.0
 
Sept. 19, 2019, 5 p.m. 74.2 ppb (71) 58.4 ppb (55) N/A 16.0 ppb (15) N/A N/A 4.0 ppb (3) N/A N/A 7.5 μg/m3 (31) 71.0
 
Sept. 19, 2019, 4 p.m. 91.1 ppb (89) 77.2 ppb (75) N/A 14.0 ppb (13) N/A N/A 2.0 ppb (2) N/A N/A 7.0 μg/m3 (29) 89.0
 
Sept. 19, 2019, 3 p.m. 86.9 ppb (85) 70.0 ppb (67) N/A 17.0 ppb (16) N/A N/A 1.0 ppb (1) N/A N/A 7.8 μg/m3 (32) 85.0
 
Sept. 19, 2019, 2 p.m. 92.8 ppb (91) 77.5 ppb (75) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) N/A N/A 7.4 μg/m3 (31) 91.0
 
Sept. 19, 2019, 1 p.m. 88.0 ppb (86) 73.6 ppb (71) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) N/A N/A 7.5 μg/m3 (31) 86.0
 
Sept. 19, 2019, noon 68.6 ppb (66) 57.2 ppb (53) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) N/A N/A 7.1 μg/m3 (30) 66.0
 
Sept. 19, 2019, 11 a.m. 53.0 ppb (49) 43.5 ppb (40) N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) N/A N/A 8.1 μg/m3 (34) 49.0
 
Sept. 19, 2019, 10 a.m. 63.0 ppb (60) 52.4 ppb (49) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) N/A N/A 9.7 μg/m3 (40) 60.0
 
Sept. 19, 2019, 9 a.m. 60.0 ppb (56) 50.2 ppb (46) N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) N/A N/A 8.6 μg/m3 (36) 56.0
 
Sept. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 7.9 μg/m3 (33) 33.0
 
Sept. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 6.4 μg/m3 (27) 27.0
 
Sept. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 19, 2019, 4 a.m. 22.2 ppb (21) 11.9 ppb (11) N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) N/A N/A 5.4 μg/m3 (23) 23.0
 
Sept. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 4.9 μg/m3 (20) 20.0
 
Sept. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 4.4 μg/m3 (18) 18.0
 
Sept. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 3.8 μg/m3 (16) 16.0
 
Sept. 19, 2019, midnight 39.6 ppb (37) 20.9 ppb (19) N/A 19.0 ppb (18) N/A N/A 13.0 ppb (10) N/A N/A 4.3 μg/m3 (18) 37.0
 
Sept. 18, 2019, 11 p.m. 43.0 ppb (40) 23.6 ppb (22) N/A 19.0 ppb (18) N/A N/A 15.0 ppb (12) N/A N/A 3.3 μg/m3 (14) 40.0
 
Sept. 18, 2019, 10 p.m. 23.2 ppb (21) 12.9 ppb (12) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) N/A N/A 3.4 μg/m3 (14) 21.0
 
Sept. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 3.7 μg/m3 (15) 15.0
 
Sept. 18, 2019, 8 p.m. 17.9 ppb (17) 8.9 ppb (8) N/A 9.0 ppb (8) N/A N/A 18.0 ppb (14) N/A N/A 3.6 μg/m3 (15) 17.0
 
Sept. 18, 2019, 7 p.m. 51.8 ppb (48) 33.0 ppb (31) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 4.6 μg/m3 (19) 48.0
 
Sept. 18, 2019, 6 p.m. 50.9 ppb (47) 32.9 ppb (30) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 4.2 μg/m3 (18) 47.0
 
Sept. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.5 μg/m3 (10) 14.0
 
Sept. 18, 2019, 4 p.m. 13.2 ppb (12) 3.5 ppb (3) N/A 10.0 ppb (9) N/A N/A 12.0 ppb (9) N/A N/A 2.7 μg/m3 (11) 12.0
 
Sept. 18, 2019, 3 p.m. 11.2 ppb (10) 2.9 ppb (3) N/A 8.0 ppb (7) N/A N/A 11.0 ppb (8) N/A N/A 2.8 μg/m3 (12) 12.0
 
Sept. 18, 2019, 2 p.m. 11.0 ppb (10) 1.4 ppb (1) N/A 10.0 ppb (9) N/A N/A 12.0 ppb (9) N/A N/A 2.7 μg/m3 (11) 11.0
 
Sept. 18, 2019, 1 p.m. 7.9 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 2.2 μg/m3 (9) 12.0
 
Sept. 18, 2019, noon 6.6 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) N/A N/A 2.3 μg/m3 (10) 15.0
 
Sept. 18, 2019, 11 a.m. 15.0 ppb (14) 3.7 ppb (3) N/A 11.0 ppb (10) N/A N/A 16.0 ppb (12) N/A N/A 2.5 μg/m3 (10) 14.0
 
Sept. 18, 2019, 10 a.m. 12.0 ppb (11) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A 21.0 ppb (16) N/A N/A 2.5 μg/m3 (10) 16.0
 
Sept. 18, 2019, 9 a.m. 8.2 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A 18.0 ppb (14) N/A N/A 2.6 μg/m3 (11) 14.0
 
Sept. 18, 2019, 8 a.m. 5.9 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A N/A 2.6 μg/m3 (11) 15.0
 
Sept. 18, 2019, 7 a.m. 6.2 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 18.0 ppb (14) N/A N/A 2.8 μg/m3 (12) 14.0
 
Sept. 18, 2019, 6 a.m. 5.5 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 2.9 μg/m3 (12) 12.0
 
Sept. 18, 2019, 5 a.m. 3.4 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) N/A N/A 2.9 μg/m3 (12) 12.0
 
Sept. 18, 2019, 4 a.m. 6.2 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 18, 2019, 3 a.m. 8.7 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 14.0 ppb (11) N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 18, 2019, 2 a.m. 9.4 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 18, 2019, 1 a.m. 7.4 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 16.0 ppb (12) N/A N/A 3.2 μg/m3 (13) 13.0
 
Sept. 18, 2019, midnight 14.3 ppb (13) 5.9 ppb (5) N/A 8.0 ppb (7) N/A N/A 17.0 ppb (13) N/A N/A 2.9 μg/m3 (12) 13.0
 
Sept. 17, 2019, 11 p.m. 9.1 ppb (8) 4.2 ppb (4) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) N/A N/A 2.7 μg/m3 (11) 17.0
 
Sept. 17, 2019, 10 p.m. 19.6 ppb (18) 9.6 ppb (9) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) N/A N/A 3.1 μg/m3 (13) 18.0
 
Sept. 17, 2019, 9 p.m. 20.3 ppb (19) 10.8 ppb (10) N/A 9.0 ppb (8) N/A N/A 20.0 ppb (15) N/A N/A 3.1 μg/m3 (13) 19.0
 
Sept. 17, 2019, 8 p.m. 16.1 ppb (15) 8.7 ppb (8) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) N/A N/A 2.8 μg/m3 (12) 15.0
 
Sept. 17, 2019, 7 p.m. 11.8 ppb (11) 6.0 ppb (6) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) N/A N/A 2.8 μg/m3 (12) 16.0
 
Sept. 17, 2019, 6 p.m. 10.1 ppb (9) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 3.2 μg/m3 (13) 17.0
 
Sept. 17, 2019, 5 p.m. 5.8 ppb (5) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) N/A N/A 3.4 μg/m3 (14) 17.0
 
Sept. 17, 2019, 4 p.m. 4.3 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) N/A N/A 2.9 μg/m3 (12) 18.0
 
Sept. 17, 2019, 3 p.m. 5.4 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (16) N/A N/A 2.8 μg/m3 (12) 16.0
 
Sept. 17, 2019, 2 p.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) N/A N/A 2.7 μg/m3 (11) 18.0
 
Sept. 17, 2019, 1 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) N/A N/A 2.7 μg/m3 (11) 17.0
 
Sept. 17, 2019, noon 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 2.7 μg/m3 (11) 17.0
 
Sept. 17, 2019, 11 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 2.8 μg/m3 (12) 17.0
 
Sept. 17, 2019, 10 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (16) N/A N/A 2.7 μg/m3 (11) 16.0
 
Sept. 17, 2019, 9 a.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) N/A N/A 2.8 μg/m3 (12) 15.0
 
Sept. 17, 2019, 8 a.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) N/A N/A 2.9 μg/m3 (12) 13.0
 
Sept. 17, 2019, 7 a.m. 4.0 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 15.0 ppb (12) N/A N/A 3.2 μg/m3 (13) 13.0
 
Sept. 17, 2019, 6 a.m. 4.0 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 11.0 ppb (8) N/A N/A 3.7 μg/m3 (15) 15.0
 
Sept. 17, 2019, 5 a.m. 3.8 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 10.0 ppb (8) N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 4 a.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 10.0 ppb (8) N/A N/A 4.1 μg/m3 (17) 17.0
 
Sept. 17, 2019, 3 a.m. 8.8 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A 6.0 ppb (5) N/A N/A 4.2 μg/m3 (18) 18.0
 
Sept. 17, 2019, 2 a.m. 9.1 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A N/A 10.0 ppb (8) N/A N/A 3.7 μg/m3 (15) 15.0
 
Sept. 17, 2019, 1 a.m. 14.8 ppb (14) 4.4 ppb (4) N/A 10.0 ppb (9) N/A N/A 11.0 ppb (8) N/A N/A 4.1 μg/m3 (17) 17.0
 
Sept. 17, 2019, midnight 22.9 ppb (21) 9.1 ppb (8) N/A 14.0 ppb (13) N/A N/A 14.0 ppb (11) N/A N/A 4.2 μg/m3 (18) 21.0
 
Sept. 16, 2019, 11 p.m. 30.7 ppb (28) 14.9 ppb (14) N/A 16.0 ppb (15) N/A N/A 16.0 ppb (12) N/A N/A 4.0 μg/m3 (17) 28.0
 
Sept. 16, 2019, 10 p.m. 23.9 ppb (22) 12.5 ppb (12) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) N/A N/A 3.0 μg/m3 (12) 22.0
 
Sept. 16, 2019, 9 p.m. 21.5 ppb (20) 10.9 ppb (10) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) N/A N/A 3.2 μg/m3 (13) 20.0
 
Sept. 16, 2019, 8 p.m. 18.3 ppb (17) 10.5 ppb (10) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) N/A N/A 3.5 μg/m3 (15) 18.0
 
Sept. 16, 2019, 7 p.m. 21.4 ppb (20) 12.7 ppb (12) N/A 9.0 ppb (8) N/A N/A 19.0 ppb (15) N/A N/A 4.2 μg/m3 (18) 20.0
 
Sept. 16, 2019, 6 p.m. 16.7 ppb (15) 10.4 ppb (10) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 5 p.m. 32.4 ppb (30) 21.1 ppb (20) N/A 11.0 ppb (10) N/A N/A 11.0 ppb (8) N/A N/A 6.4 μg/m3 (27) 30.0
 
Sept. 16, 2019, 4 p.m. 44.9 ppb (42) 29.4 ppb (27) N/A 16.0 ppb (15) N/A N/A 7.0 ppb (5) N/A N/A 6.7 μg/m3 (28) 42.0
 
Sept. 16, 2019, 3 p.m. 52.1 ppb (48) 33.4 ppb (31) N/A 19.0 ppb (18) N/A N/A 6.0 ppb (5) N/A N/A 6.6 μg/m3 (28) 48.0
 
Sept. 16, 2019, 2 p.m. 30.3 ppb (28) 16.7 ppb (15) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) N/A N/A 5.6 μg/m3 (23) 28.0
 
Sept. 16, 2019, 1 p.m. 20.2 ppb (19) 9.7 ppb (9) N/A 11.0 ppb (10) N/A N/A 4.0 ppb (3) N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 16, 2019, noon 20.7 ppb (19) 9.1 ppb (8) N/A 12.0 ppb (11) N/A N/A 8.0 ppb (6) N/A N/A 4.6 μg/m3 (19) 19.0
 
Sept. 16, 2019, 11 a.m. 19.2 ppb (18) 8.4 ppb (8) N/A 11.0 ppb (10) N/A N/A 12.0 ppb (9) N/A N/A 4.6 μg/m3 (19) 19.0
 
Sept. 16, 2019, 10 a.m. 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 5.5 μg/m3 (23) 23.0
 
Sept. 16, 2019, 9 a.m. 4.4 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 16, 2019, 8 a.m. 5.2 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 5.4 μg/m3 (23) 23.0
 
Sept. 16, 2019, 7 a.m. 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) N/A N/A 4.8 μg/m3 (20) 20.0
 
Sept. 16, 2019, 6 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) N/A N/A 4.9 μg/m3 (20) 20.0
 
Sept. 16, 2019, 5 a.m. 6.1 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 4 a.m. 15.1 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A 19.0 ppb (15) N/A N/A 4.5 μg/m3 (19) 19.0
 
Sept. 16, 2019, 3 a.m. 10.0 ppb (9) 1.8 ppb (2) N/A 8.0 ppb (7) N/A N/A 22.0 ppb (17) N/A N/A 4.5 μg/m3 (19) 19.0
 
Sept. 16, 2019, 2 a.m. 10.3 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) N/A N/A 4.5 μg/m3 (19) 19.0
 
Sept. 16, 2019, 1 a.m. 16.3 ppb (15) 4.6 ppb (4) N/A 12.0 ppb (11) N/A N/A 22.0 ppb (17) N/A N/A 4.6 μg/m3 (19) 19.0
 
Sept. 16, 2019, midnight 21.9 ppb (20) 9.7 ppb (9) N/A 12.0 ppb (11) N/A N/A 21.0 ppb (16) N/A N/A 4.5 μg/m3 (19) 20.0
 
Sept. 15, 2019, 11 p.m. 6.0 ppb (6) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) N/A N/A 4.0 μg/m3 (17) 22.0
 
Sept. 15, 2019, 10 p.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A N/A 3.6 μg/m3 (15) 22.0
 
Sept. 15, 2019, 9 p.m. 7.0 ppb (6) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (18) N/A N/A 3.3 μg/m3 (14) 18.0
 
Sept. 15, 2019, 8 p.m. 3.3 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) N/A N/A 3.4 μg/m3 (14) 16.0
 
Sept. 15, 2019, 7 p.m. 4.5 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) N/A N/A 3.1 μg/m3 (13) 14.0
 
Sept. 15, 2019, 6 p.m. 3.4 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A N/A 2.5 μg/m3 (10) 13.0
 
Sept. 15, 2019, 5 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A N/A 2.7 μg/m3 (11) 13.0
 
Sept. 15, 2019, 4 p.m. 11.3 ppb (10) 4.3 ppb (4) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 3.4 μg/m3 (14) 14.0
 
Sept. 15, 2019, 3 p.m. 12.9 ppb (12) 5.5 ppb (5) N/A 7.0 ppb (6) N/A N/A 18.0 ppb (14) N/A N/A 3.5 μg/m3 (15) 15.0
 
Sept. 15, 2019, 2 p.m. 5.3 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A N/A 3.6 μg/m3 (15) 15.0
 
Sept. 15, 2019, 1 p.m. 8.3 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) N/A N/A 3.9 μg/m3 (16) 16.0
 
Sept. 15, 2019, noon 5.0 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 22.0 ppb (17) N/A N/A 3.8 μg/m3 (16) 17.0
 
Sept. 15, 2019, 11 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) N/A N/A 3.7 μg/m3 (15) 19.0
 
Sept. 15, 2019, 10 a.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A N/A 3.9 μg/m3 (16) 17.0
 
Sept. 15, 2019, 9 a.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) N/A N/A 4.2 μg/m3 (18) 18.0
 
Sept. 15, 2019, 8 a.m. 4.6 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A N/A 4.7 μg/m3 (20) 20.0
 
Sept. 15, 2019, 7 a.m. 4.1 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (16) N/A N/A 4.1 μg/m3 (17) 17.0
 
Sept. 15, 2019, 6 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (16) N/A N/A 4.2 μg/m3 (18) 18.0
 
Sept. 15, 2019, 5 a.m. 15.2 ppb (14) 3.3 ppb (3) N/A 12.0 ppb (11) N/A N/A 13.0 ppb (10) N/A N/A 4.8 μg/m3 (20) 20.0
 
Sept. 15, 2019, 4 a.m. 25.8 ppb (24) 10.4 ppb (10) N/A 15.0 ppb (14) N/A N/A 12.0 ppb (9) N/A N/A 4.3 μg/m3 (18) 24.0
 
Sept. 15, 2019, 3 a.m. 27.3 ppb (25) 11.6 ppb (11) N/A 16.0 ppb (15) N/A N/A 15.0 ppb (12) N/A N/A 3.8 μg/m3 (16) 25.0
 
Sept. 15, 2019, 2 a.m. 21.3 ppb (20) 9.6 ppb (9) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) N/A N/A 4.2 μg/m3 (18) 20.0
 
Sept. 15, 2019, 1 a.m. 22.3 ppb (21) 10.0 ppb (9) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) N/A N/A 4.2 μg/m3 (18) 21.0
 
Sept. 15, 2019, midnight 17.0 ppb (16) 7.9 ppb (7) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) N/A N/A 4.2 μg/m3 (18) 19.0
 
Sept. 14, 2019, 11 p.m. 11.5 ppb (11) 4.8 ppb (4) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 3.9 μg/m3 (16) 22.0
 
Sept. 14, 2019, 10 p.m. 13.9 ppb (13) 7.7 ppb (7) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) N/A N/A 3.7 μg/m3 (15) 20.0
 
Sept. 14, 2019, 9 p.m. 16.0 ppb (15) 8.1 ppb (8) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) N/A N/A 4.5 μg/m3 (19) 20.0
 
Sept. 14, 2019, 8 p.m. 15.1 ppb (14) 8.1 ppb (8) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 14, 2019, 7 p.m. 13.7 ppb (13) 7.2 ppb (7) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 6.0 μg/m3 (25) 25.0