AQSQID: 410670005

Site Name: Portland Near Road

Location: Tualatin, OR

Reporting: True, Located: True

Current AQI: 20.0

Tualatin OR, US: 45.39916, -122.7455

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 20, 2019, 3 a.m. 16.6 ppb (15) 7.4 ppb (7) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 20.0
 
May 20, 2019, 2 a.m. 19.9 ppb (18) 10.1 ppb (9) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 3.8 μg/m3 (16) 19.0
 
May 20, 2019, 1 a.m. 19.9 ppb (18) 9.7 ppb (9) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 19.0
 
May 20, 2019, midnight 17.4 ppb (16) 8.2 ppb (8) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 21.0
 
May 19, 2019, 11 p.m. 17.5 ppb (16) 9.0 ppb (8) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 3.8 μg/m3 (16) 22.0
 
May 19, 2019, 10 p.m. 16.6 ppb (15) 8.1 ppb (8) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.2 ppb (2) N/A 3.6 μg/m3 (15) 25.0
 
May 19, 2019, 9 p.m. 13.9 ppb (13) 6.3 ppb (6) N/A 8.0 ppb (7) N/A N/A 36.0 ppb (28) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 28.0
 
May 19, 2019, 8 p.m. 9.0 ppb (8) 4.0 ppb (4) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 29.0
 
May 19, 2019, 7 p.m. 9.2 ppb (9) 4.2 ppb (4) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 29.0
 
May 19, 2019, 6 p.m. 9.2 ppb (9) 4.1 ppb (4) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 29.0
 
May 19, 2019, 5 p.m. 7.3 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 29.0
 
May 19, 2019, 4 p.m. 13.1 ppb (12) 5.4 ppb (5) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 22.0
 
May 19, 2019, 3 p.m. 17.2 ppb (16) 7.3 ppb (7) N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A 3.6 μg/m3 (15) 16.0
 
May 19, 2019, 2 p.m. 10.0 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 16.0
 
May 19, 2019, 1 p.m. 2.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) 0.0 ppb (0) N/A 3.1 μg/m3 (13) 18.0
 
May 19, 2019, noon 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.0 ppb (0) N/A 3.0 μg/m3 (12) 20.0
 
May 19, 2019, 11 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.0 ppb (0) N/A 3.1 μg/m3 (13) 22.0
 
May 19, 2019, 10 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) 0.0 ppb (0) N/A 3.2 μg/m3 (13) 22.0
 
May 19, 2019, 9 a.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) 0.0 ppb (0) N/A 3.1 μg/m3 (13) 22.0
 
May 19, 2019, 8 a.m. 7.1 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 17.0
 
May 19, 2019, 7 a.m. 12.3 ppb (11) 4.2 ppb (4) N/A 8.0 ppb (7) N/A N/A 16.0 ppb (12) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 18.0
 
May 19, 2019, 6 a.m. 14.3 ppb (13) 5.6 ppb (5) N/A 9.0 ppb (8) N/A N/A 18.0 ppb (14) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 19.0
 
May 19, 2019, 5 a.m. 14.6 ppb (14) 6.4 ppb (6) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 18.0
 
May 19, 2019, 4 a.m. 15.1 ppb (14) 5.7 ppb (5) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A 4.3 μg/m3 (18) 18.0
 
May 19, 2019, 3 a.m. 16.0 ppb (15) 5.8 ppb (5) N/A 10.0 ppb (9) N/A N/A 24.0 ppb (18) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 18.0
 
May 19, 2019, 2 a.m. 18.6 ppb (17) 7.5 ppb (7) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 4.3 μg/m3 (18) 19.0
 
May 19, 2019, 1 a.m. 14.1 ppb (13) 5.4 ppb (5) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.1 ppb (1) N/A 4.6 μg/m3 (19) 22.0
 
May 19, 2019, midnight 7.4 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 26.0
 
May 18, 2019, 11 p.m. 5.6 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 28.0
 
May 18, 2019, 10 p.m. 4.7 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 28.0
 
May 18, 2019, 9 p.m. 4.3 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 27.0
 
May 18, 2019, 8 p.m. 3.7 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.0 ppb (0) N/A 3.5 μg/m3 (15) 26.0
 
May 18, 2019, 7 p.m. 3.3 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 26.0
 
May 18, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 25.0
 
May 18, 2019, 5 p.m. 3.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.0 ppb (0) N/A 3.2 μg/m3 (13) 20.0
 
May 18, 2019, 4 p.m. 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.0 ppb (0) N/A 3.5 μg/m3 (15) 15.0
 
May 18, 2019, 3 p.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 16.0 ppb (12) 0.0 ppb (0) N/A 3.9 μg/m3 (16) 16.0
 
May 18, 2019, 2 p.m. 7.1 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 12.0 ppb (9) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2019, 1 p.m. 6.3 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 10.0 ppb (8) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
May 18, 2019, noon 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 11.0 ppb (8) 0.1 ppb (1) N/A 6.9 μg/m3 (29) 29.0
 
May 18, 2019, 11 a.m. 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 13.0 ppb (10) 0.1 ppb (1) N/A 6.6 μg/m3 (28) 28.0
 
May 18, 2019, 10 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) 0.1 ppb (1) N/A 6.1 μg/m3 (25) 25.0
 
May 18, 2019, 9 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
May 18, 2019, 8 a.m. 3.9 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 22.0 ppb (17) 0.1 ppb (1) N/A 6.5 μg/m3 (27) 27.0
 
May 18, 2019, 7 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 22.0 ppb (17) 0.1 ppb (1) N/A 6.5 μg/m3 (27) 27.0
 
May 18, 2019, 6 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.1 ppb (1) N/A 6.1 μg/m3 (25) 25.0
 
May 18, 2019, 5 a.m. 9.6 ppb (9) 2.4 ppb (2) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 21.0
 
May 18, 2019, 4 a.m. 13.0 ppb (12) 3.9 ppb (4) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 20.0
 
May 18, 2019, 3 a.m. 15.9 ppb (15) 5.9 ppb (5) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 4.5 μg/m3 (19) 20.0
 
May 18, 2019, 2 a.m. 20.4 ppb (19) 9.3 ppb (9) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
May 18, 2019, 1 a.m. 20.5 ppb (19) 9.8 ppb (9) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 4.9 μg/m3 (20) 20.0
 
May 18, 2019, midnight 19.0 ppb (18) 9.1 ppb (8) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 23.0
 
May 17, 2019, 11 p.m. 14.8 ppb (14) 7.1 ppb (7) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 25.0
 
May 17, 2019, 10 p.m. 16.7 ppb (15) 8.6 ppb (8) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 25.0
 
May 17, 2019, 9 p.m. 23.2 ppb (21) 12.5 ppb (12) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
May 17, 2019, 8 p.m. 25.5 ppb (24) 14.1 ppb (13) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 24.0
 
May 17, 2019, 7 p.m. 24.3 ppb (23) 13.4 ppb (12) N/A 11.0 ppb (10) N/A N/A 28.0 ppb (22) 0.1 ppb (1) N/A 5.6 μg/m3 (23) 23.0
 
May 17, 2019, 6 p.m. 29.3 ppb (27) 16.5 ppb (15) N/A 13.0 ppb (12) N/A N/A 25.0 ppb (19) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 27.0
 
May 17, 2019, 5 p.m. 39.5 ppb (37) 22.9 ppb (21) N/A 17.0 ppb (16) N/A N/A 17.0 ppb (13) 0.2 ppb (2) N/A 4.5 μg/m3 (19) 37.0
 
May 17, 2019, 4 p.m. 42.3 ppb (39) 26.2 ppb (24) N/A 17.0 ppb (16) N/A N/A 12.0 ppb (9) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 39.0
 
May 17, 2019, 3 p.m. 40.0 ppb (37) 25.7 ppb (24) N/A 15.0 ppb (14) N/A N/A 11.0 ppb (8) 0.2 ppb (2) N/A 4.3 μg/m3 (18) 37.0
 
May 17, 2019, 2 p.m. 40.9 ppb (38) 25.8 ppb (24) N/A 16.0 ppb (15) N/A N/A 10.0 ppb (8) 0.2 ppb (2) N/A 4.5 μg/m3 (19) 38.0
 
May 17, 2019, 1 p.m. 34.9 ppb (32) 21.1 ppb (20) N/A 14.0 ppb (13) N/A N/A 12.0 ppb (9) 0.2 ppb (2) N/A 4.4 μg/m3 (18) 32.0
 
May 17, 2019, noon 21.9 ppb (20) 11.8 ppb (11) N/A 10.0 ppb (9) N/A N/A 16.0 ppb (12) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 20.0
 
May 17, 2019, 11 a.m. 15.2 ppb (14) 6.4 ppb (6) N/A 9.0 ppb (8) N/A N/A 19.0 ppb (15) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 18.0
 
May 17, 2019, 10 a.m. 10.3 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 21.0 ppb (16) 0.0 ppb (0) N/A 4.4 μg/m3 (18) 18.0
 
May 17, 2019, 9 a.m. 6.9 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) 0.0 ppb (0) N/A 4.5 μg/m3 (19) 19.0
 
May 17, 2019, 8 a.m. 6.0 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.0 ppb (0) N/A 4.1 μg/m3 (17) 20.0
 
May 17, 2019, 7 a.m. 11.3 ppb (10) 3.1 ppb (3) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 19.0
 
May 17, 2019, 6 a.m. 17.6 ppb (16) 6.8 ppb (6) N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 16.0
 
May 17, 2019, 5 a.m. 15.9 ppb (15) 5.4 ppb (5) N/A 11.0 ppb (10) N/A N/A 17.0 ppb (13) 0.1 ppb (1) N/A 4.9 μg/m3 (20) 20.0
 
May 17, 2019, 4 a.m. 15.5 ppb (14) 4.2 ppb (4) N/A 11.0 ppb (10) N/A N/A 17.0 ppb (13) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 17, 2019, 3 a.m. 19.3 ppb (18) 6.4 ppb (6) N/A 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 17, 2019, 2 a.m. 25.6 ppb (24) 11.3 ppb (10) N/A 14.0 ppb (13) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
May 17, 2019, 1 a.m. 30.1 ppb (28) 14.2 ppb (13) N/A 16.0 ppb (15) N/A N/A 19.0 ppb (15) 0.3 ppb (3) N/A 5.4 μg/m3 (23) 28.0
 
May 17, 2019, midnight 27.5 ppb (25) 12.2 ppb (11) N/A 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.3 ppb (3) N/A 5.6 μg/m3 (23) 25.0
 
May 16, 2019, 11 p.m. 22.1 ppb (20) 9.8 ppb (9) N/A 12.0 ppb (11) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 16, 2019, 10 p.m. 16.2 ppb (15) 7.2 ppb (7) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 22.0
 
May 16, 2019, 9 p.m. 20.1 ppb (19) 9.8 ppb (9) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 21.0
 
May 16, 2019, 8 p.m. 29.9 ppb (28) 15.9 ppb (15) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) N/A N/A 4.7 μg/m3 (20) 28.0
 
May 16, 2019, 7 p.m. 35.0 ppb (32) 18.9 ppb (18) N/A 16.0 ppb (15) N/A N/A 21.0 ppb (16) N/A N/A 4.4 μg/m3 (18) 32.0
 
May 16, 2019, 6 p.m. 39.2 ppb (36) 22.1 ppb (20) N/A 17.0 ppb (16) N/A N/A 19.0 ppb (15) N/A N/A 4.3 μg/m3 (18) 36.0
 
May 16, 2019, 5 p.m. 48.0 ppb (44) 30.7 ppb (28) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (8) N/A N/A 5.4 μg/m3 (23) 44.0
 
May 16, 2019, 4 p.m. 56.2 ppb (52) 41.1 ppb (38) N/A 16.0 ppb (15) N/A N/A 3.0 ppb (2) N/A N/A 7.9 μg/m3 (33) 52.0
 
May 16, 2019, 3 p.m. 54.1 ppb (50) 41.5 ppb (38) N/A 14.0 ppb (13) N/A N/A 2.0 ppb (2) N/A N/A 8.7 μg/m3 (36) 50.0
 
May 16, 2019, 2 p.m. 58.4 ppb (55) 46.6 ppb (43) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) N/A N/A 8.9 μg/m3 (37) 55.0
 
May 16, 2019, 1 p.m. 62.9 ppb (59) 51.5 ppb (48) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) N/A N/A 9.3 μg/m3 (39) 59.0
 
May 16, 2019, noon 44.2 ppb (41) 34.1 ppb (32) N/A 11.0 ppb (10) N/A N/A 2.0 ppb (2) N/A N/A 8.1 μg/m3 (34) 41.0
 
May 16, 2019, 11 a.m. 24.8 ppb (23) 15.3 ppb (14) N/A 10.0 ppb (9) N/A N/A 3.0 ppb (2) N/A N/A 7.6 μg/m3 (32) 32.0
 
May 16, 2019, 10 a.m. 18.8 ppb (17) 8.4 ppb (8) N/A 10.0 ppb (9) N/A N/A 4.0 ppb (3) N/A N/A 8.1 μg/m3 (34) 34.0
 
May 16, 2019, 9 a.m. 18.2 ppb (17) 7.3 ppb (7) N/A 11.0 ppb (10) N/A N/A 4.0 ppb (3) N/A N/A 8.7 μg/m3 (36) 36.0
 
May 16, 2019, 8 a.m. 20.3 ppb (19) 7.9 ppb (7) N/A 12.0 ppb (11) N/A N/A 4.0 ppb (3) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 16, 2019, 7 a.m. 28.7 ppb (27) 13.8 ppb (13) N/A 15.0 ppb (14) N/A N/A 3.0 ppb (2) N/A N/A 8.6 μg/m3 (36) 36.0
 
May 16, 2019, 6 a.m. 24.7 ppb (23) 11.5 ppb (11) N/A 13.0 ppb (12) N/A N/A 4.0 ppb (3) N/A N/A 8.1 μg/m3 (34) 34.0
 
May 16, 2019, 5 a.m. 12.2 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A N/A 8.0 ppb (6) N/A N/A 7.2 μg/m3 (30) 30.0
 
May 16, 2019, 4 a.m. 8.9 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 11.0 ppb (8) N/A N/A 6.4 μg/m3 (27) 27.0
 
May 16, 2019, 3 a.m. 7.8 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 13.0 ppb (10) N/A N/A 6.0 μg/m3 (25) 25.0
 
May 16, 2019, 2 a.m. 8.2 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (11) N/A N/A 5.8 μg/m3 (24) 24.0
 
May 16, 2019, 1 a.m. 14.6 ppb (14) 5.7 ppb (5) N/A 9.0 ppb (8) N/A N/A 13.0 ppb (10) N/A N/A 5.6 μg/m3 (23) 23.0
 
May 16, 2019, midnight 25.8 ppb (24) 13.1 ppb (12) N/A 13.0 ppb (12) N/A N/A 13.0 ppb (10) N/A N/A 5.2 μg/m3 (22) 24.0
 
May 15, 2019, 11 p.m. 23.5 ppb (22) 13.2 ppb (12) N/A 11.0 ppb (10) N/A N/A 19.0 ppb (15) N/A N/A 4.6 μg/m3 (19) 22.0
 
May 15, 2019, 10 p.m. 9.7 ppb (9) 5.0 ppb (5) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (18) N/A N/A 4.5 μg/m3 (19) 19.0
 
May 15, 2019, 9 p.m. 4.5 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) N/A N/A 4.7 μg/m3 (20) 20.0
 
May 15, 2019, 8 p.m. 4.1 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A N/A 4.4 μg/m3 (18) 19.0
 
May 15, 2019, 7 p.m. 4.3 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) N/A N/A 3.7 μg/m3 (15) 20.0
 
May 15, 2019, 6 p.m. 8.3 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) N/A N/A 3.9 μg/m3 (16) 17.0
 
May 15, 2019, 5 p.m. 19.1 ppb (18) 10.4 ppb (10) N/A 9.0 ppb (8) N/A N/A 14.0 ppb (11) 0.0 ppb (0) N/A 5.1 μg/m3 (21) 21.0
 
May 15, 2019, 4 p.m. 48.8 ppb (45) 35.1 ppb (32) N/A 14.0 ppb (13) N/A N/A 7.0 ppb (5) 0.2 ppb (2) N/A 6.4 μg/m3 (27) 45.0
 
May 15, 2019, 3 p.m. 65.3 ppb (62) 49.9 ppb (46) N/A 17.0 ppb (16) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 62.0
 
May 15, 2019, 2 p.m. 60.4 ppb (57) 45.9 ppb (42) N/A 15.0 ppb (14) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 6.8 μg/m3 (28) 57.0
 
May 15, 2019, 1 p.m. 51.4 ppb (48) 38.2 ppb (35) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) 0.2 ppb (2) N/A 6.3 μg/m3 (26) 48.0
 
May 15, 2019, noon 36.4 ppb (34) 25.1 ppb (23) N/A 12.0 ppb (11) N/A N/A 5.0 ppb (4) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 34.0
 
May 15, 2019, 11 a.m. 26.4 ppb (24) 16.0 ppb (15) N/A 11.0 ppb (10) N/A N/A 4.0 ppb (3) 0.0 ppb (0) N/A 6.2 μg/m3 (26) 26.0
 
May 15, 2019, 10 a.m. 22.9 ppb (21) 11.7 ppb (11) N/A 11.0 ppb (10) N/A N/A 3.0 ppb (2) 0.0 ppb (0) N/A 5.8 μg/m3 (24) 24.0
 
May 15, 2019, 9 a.m. 19.0 ppb (18) 8.4 ppb (8) N/A 11.0 ppb (10) N/A N/A 4.0 ppb (3) 0.0 ppb (0) N/A 5.8 μg/m3 (24) 24.0
 
May 15, 2019, 8 a.m. 16.1 ppb (15) 6.2 ppb (6) N/A 10.0 ppb (9) N/A N/A 8.0 ppb (6) 0.0 ppb (0) N/A 5.4 μg/m3 (23) 23.0
 
May 15, 2019, 7 a.m. 21.1 ppb (20) 9.6 ppb (9) N/A 12.0 ppb (11) N/A N/A 7.0 ppb (5) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
May 15, 2019, 6 a.m. 20.8 ppb (19) 8.9 ppb (8) N/A 12.0 ppb (11) N/A N/A 5.0 ppb (4) 0.1 ppb (1) N/A 4.6 μg/m3 (19) 19.0
 
May 15, 2019, 5 a.m. 14.3 ppb (13) 3.9 ppb (4) N/A 10.0 ppb (9) N/A N/A 9.0 ppb (7) 0.0 ppb (0) N/A 4.4 μg/m3 (18) 18.0
 
May 15, 2019, 4 a.m. 11.8 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 14.0 ppb (11) 0.0 ppb (0) N/A 4.3 μg/m3 (18) 18.0
 
May 15, 2019, 3 a.m. 10.3 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.0 ppb (0) N/A 4.4 μg/m3 (18) 18.0
 
May 15, 2019, 2 a.m. 9.6 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) 0.0 ppb (0) N/A 4.6 μg/m3 (19) 19.0
 
May 15, 2019, 1 a.m. 9.3 ppb (9) 3.5 ppb (3) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) 0.0 ppb (0) N/A 4.8 μg/m3 (20) 20.0
 
May 15, 2019, midnight 10.3 ppb (10) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) 0.0 ppb (0) N/A 6.7 μg/m3 (28) 28.0
 
May 14, 2019, 11 p.m. 16.8 ppb (16) 8.2 ppb (8) N/A 9.0 ppb (8) N/A N/A 18.0 ppb (14) 0.1 ppb (1) N/A 7.3 μg/m3 (30) 30.0
 
May 14, 2019, 10 p.m. 21.5 ppb (20) 12.0 ppb (11) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) 0.1 ppb (1) N/A 5.8 μg/m3 (24) 24.0
 
May 14, 2019, 9 p.m. 19.3 ppb (18) 10.7 ppb (10) N/A 9.0 ppb (8) N/A N/A 19.0 ppb (15) 0.0 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2019, 8 p.m. 16.8 ppb (16) 8.7 ppb (8) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) 0.0 ppb (0) N/A 6.6 μg/m3 (28) 28.0
 
May 14, 2019, 7 p.m. 14.0 ppb (13) 7.4 ppb (7) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.0 ppb (0) N/A 6.1 μg/m3 (25) 25.0
 
May 14, 2019, 6 p.m. 13.2 ppb (12) 7.0 ppb (6) N/A 6.0 ppb (6) N/A N/A 18.0 ppb (14) 0.0 ppb (0) N/A 6.5 μg/m3 (27) 27.0
 
May 14, 2019, 5 p.m. 17.4 ppb (16) 8.9 ppb (8) N/A 9.0 ppb (8) N/A N/A 15.0 ppb (12) 0.0 ppb (0) N/A 6.6 μg/m3 (28) 28.0
 
May 14, 2019, 4 p.m. 15.7 ppb (15) 6.7 ppb (6) N/A 9.0 ppb (8) N/A N/A 14.0 ppb (11) 0.0 ppb (0) N/A 5.2 μg/m3 (22) 22.0
 
May 14, 2019, 3 p.m. 10.6 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 16.0 ppb (12) 0.0 ppb (0) N/A 4.6 μg/m3 (19) 19.0
 
May 14, 2019, 2 p.m. 8.2 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.0 ppb (0) N/A 4.5 μg/m3 (19) 19.0
 
May 14, 2019, 1 p.m. 6.5 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) 0.0 ppb (0) N/A 4.5 μg/m3 (19) 19.0
 
May 14, 2019, noon 11.0 ppb (10) 2.9 ppb (3) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.0 ppb (0) N/A 4.8 μg/m3 (20) 20.0
 
May 14, 2019, 11 a.m. 11.2 ppb (10) 3.3 ppb (3) N/A 8.0 ppb (7) N/A N/A 21.0 ppb (16) 0.0 ppb (0) N/A 5.1 μg/m3 (21) 21.0
 
May 14, 2019, 10 a.m. 5.1 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.0 ppb (0) N/A 5.2 μg/m3 (22) 22.0
 
May 14, 2019, 9 a.m. 4.4 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.0 ppb (0) N/A 5.5 μg/m3 (23) 23.0
 
May 14, 2019, 8 a.m. 3.8 ppb (4) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.0 ppb (0) N/A 5.9 μg/m3 (25) 25.0
 
May 14, 2019, 7 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) 0.0 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
May 14, 2019, 6 a.m. 6.6 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (19) 0.0 ppb (0) N/A 6.4 μg/m3 (27) 27.0
 
May 14, 2019, 5 a.m. 11.9 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A 22.0 ppb (17) 0.0 ppb (0) N/A 7.2 μg/m3 (30) 30.0
 
May 14, 2019, 4 a.m. 16.1 ppb (15) 4.6 ppb (4) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.1 ppb (1) N/A 7.4 μg/m3 (31) 31.0
 
May 14, 2019, 3 a.m. 16.7 ppb (15) 5.7 ppb (5) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.1 ppb (1) N/A 7.1 μg/m3 (30) 30.0
 
May 14, 2019, 2 a.m. 15.8 ppb (15) 6.3 ppb (6) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.1 ppb (1) N/A 7.1 μg/m3 (30) 30.0
 
May 14, 2019, 1 a.m. 15.6 ppb (14) 6.6 ppb (6) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A 7.6 μg/m3 (32) 32.0
 
May 14, 2019, midnight 14.0 ppb (13) 5.5 ppb (5) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.1 ppb (1) N/A 7.6 μg/m3 (32) 32.0
 
May 13, 2019, 11 p.m. 12.8 ppb (12) 5.5 ppb (5) N/A 7.0 ppb (6) N/A N/A 35.0 ppb (27) 0.0 ppb (0) N/A 7.1 μg/m3 (30) 30.0
 
May 13, 2019, 10 p.m. 17.8 ppb (16) 9.2 ppb (9) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.1 ppb (1) N/A 7.7 μg/m3 (32) 32.0
 
May 13, 2019, 9 p.m. 20.1 ppb (19) 11.1 ppb (10) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) 0.1 ppb (1) N/A 8.5 μg/m3 (35) 35.0
 
May 13, 2019, 8 p.m. 17.9 ppb (17) 10.1 ppb (9) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.0 ppb (0) N/A 8.6 μg/m3 (36) 36.0
 
May 13, 2019, 7 p.m. 14.9 ppb (14) 8.1 ppb (8) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) 0.0 ppb (0) N/A 8.1 μg/m3 (34) 34.0
 
May 13, 2019, 6 p.m. 16.5 ppb (15) 8.1 ppb (8) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) 0.0 ppb (0) N/A 8.0 μg/m3 (33) 33.0
 
May 13, 2019, 5 p.m. 16.0 ppb (15) 7.5 ppb (7) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) 0.0 ppb (0) N/A 7.6 μg/m3 (32) 32.0
 
May 13, 2019, 4 p.m. 10.4 ppb (10) 4.4 ppb (4) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) 0.0 ppb (0) N/A 6.4 μg/m3 (27) 27.0
 
May 13, 2019, 3 p.m. 8.3 ppb (8) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (19) 0.0 ppb (0) N/A 6.2 μg/m3 (26) 26.0
 
May 13, 2019, 2 p.m. 9.5 ppb (9) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A 18.0 ppb (14) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 1 p.m. 8.2 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, noon 5.6 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) 0.0 ppb (0) N/A 6.2 μg/m3 (26) 26.0
 
May 13, 2019, 11 a.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.0 ppb (0) N/A 6.1 μg/m3 (25) 25.0
 
May 13, 2019, 10 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) 0.0 ppb (0) N/A 6.2 μg/m3 (26) 26.0
 
May 13, 2019, 9 a.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 8 a.m. 4.5 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 7 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 6 a.m. 9.0 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 21.0 ppb (16) 0.0 ppb (0) N/A 7.1 μg/m3 (30) 30.0
 
May 13, 2019, 5 a.m. 12.6 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.1 ppb (1) N/A 7.4 μg/m3 (31) 31.0
 
May 13, 2019, 4 a.m. 11.3 ppb (10) 2.5 ppb (2) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) 0.1 ppb (1) N/A 6.7 μg/m3 (28) 28.0