AQSQID: 410510080

Site Name: Portland - Se Lafayette

Location: Portland, OR

Reporting: True, Located: True

Current AQI: 21.0

Portland OR, US: 45.496641, -122.602877

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 19, 2019, 2 p.m. 5.9 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 21.0
 
May 19, 2019, 1 p.m. 4.4 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.1 ppb (1) N/A 1.7 μg/m3 (7) 19.0
 
May 19, 2019, noon 3.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 1.5 μg/m3 (6) 22.0
 
May 19, 2019, 11 a.m. 3.4 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 1.4 μg/m3 (6) 23.0
 
May 19, 2019, 10 a.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.1 ppb (1) N/A 1.6 μg/m3 (7) 24.0
 
May 19, 2019, 9 a.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 1.5 μg/m3 (6) 23.0
 
May 19, 2019, 8 a.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 2.1 μg/m3 (9) 21.0
 
May 19, 2019, 7 a.m. 6.9 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 18.0
 
May 19, 2019, 6 a.m. 10.6 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.1 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2019, 5 a.m. 14.2 ppb (13) 1.2 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 16.0 ppb (12) 0.2 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
May 19, 2019, 4 a.m. 12.3 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 19.0 ppb (15) 0.2 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
May 19, 2019, 3 a.m. 8.0 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.2 ppb (2) N/A 3.3 μg/m3 (14) 17.0
 
May 19, 2019, 2 a.m. 5.0 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 23.0
 
May 19, 2019, 1 a.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 28.0
 
May 19, 2019, midnight 4.6 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 2.0 μg/m3 (8) 30.0
 
May 18, 2019, 11 p.m. 4.3 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 29.0
 
May 18, 2019, 10 p.m. 4.0 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 2.0 μg/m3 (8) 28.0
 
May 18, 2019, 9 p.m. 3.6 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 1.8 μg/m3 (8) 28.0
 
May 18, 2019, 8 p.m. 3.5 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 26.0
 
May 18, 2019, 7 p.m. 4.3 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 24.0
 
May 18, 2019, 6 p.m. 5.1 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 24.0
 
May 18, 2019, 5 p.m. 5.4 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 21.0
 
May 18, 2019, 4 p.m. 6.1 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 19.0
 
May 18, 2019, 3 p.m. 6.6 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (15) 0.1 ppb (1) N/A 2.0 μg/m3 (8) 15.0
 
May 18, 2019, 2 p.m. 7.1 ppb (7) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (15) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 15.0
 
May 18, 2019, 1 p.m. 5.7 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 15.0
 
May 18, 2019, noon 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (14) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 14.0
 
May 18, 2019, 11 a.m. 5.3 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 3.2 μg/m3 (13) 13.0
 
May 18, 2019, 10 a.m. 8.5 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 4.8 μg/m3 (20) 20.0
 
May 18, 2019, 9 a.m. 9.1 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.2 ppb (2) N/A 5.7 μg/m3 (24) 24.0
 
May 18, 2019, 8 a.m. 10.7 ppb (10) 1.6 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 13.0 ppb (10) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
May 18, 2019, 7 a.m. 8.2 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (12) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 18, 2019, 6 a.m. 8.8 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 18.0 ppb (14) 0.1 ppb (1) N/A 4.6 μg/m3 (19) 19.0
 
May 18, 2019, 5 a.m. 6.2 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 21.0
 
May 18, 2019, 4 a.m. 5.3 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 23.0
 
May 18, 2019, 3 a.m. 4.5 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 25.0
 
May 18, 2019, 2 a.m. 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 25.0
 
May 18, 2019, 1 a.m. 4.3 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 28.0
 
May 18, 2019, midnight 4.0 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 29.0
 
May 17, 2019, 11 p.m. 3.6 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 31.0
 
May 17, 2019, 10 p.m. 3.2 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 31.0
 
May 17, 2019, 9 p.m. 3.5 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 32.0
 
May 17, 2019, 8 p.m. 3.6 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 31.0
 
May 17, 2019, 7 p.m. 3.9 ppb (4) 1.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 30.0
 
May 17, 2019, 6 p.m. 4.7 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 28.0
 
May 17, 2019, 5 p.m. 5.3 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.1 ppb (1) N/A 1.8 μg/m3 (8) 22.0
 
May 17, 2019, 4 p.m. 6.6 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 1.5 μg/m3 (6) 21.0
 
May 17, 2019, 3 p.m. 6.9 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 21.0 ppb (16) 0.1 ppb (1) N/A 1.7 μg/m3 (7) 16.0
 
May 17, 2019, 2 p.m. 5.7 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 2.1 μg/m3 (9) 17.0
 
May 17, 2019, 1 p.m. 4.8 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 17.0
 
May 17, 2019, noon 3.4 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 20.0
 
May 17, 2019, 11 a.m. 3.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 22.0
 
May 17, 2019, 10 a.m. 3.2 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 22.0
 
May 17, 2019, 9 a.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 23.0
 
May 17, 2019, 8 a.m. 3.7 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 22.0
 
May 17, 2019, 7 a.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.1 ppb (1) N/A 2.0 μg/m3 (8) 24.0
 
May 17, 2019, 6 a.m. 4.9 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 2.1 μg/m3 (9) 20.0
 
May 17, 2019, 5 a.m. 7.3 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (15) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 16.0
 
May 17, 2019, 4 a.m. 12.3 ppb (11) 1.2 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 13.0 ppb (10) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
May 17, 2019, 3 a.m. 11.4 ppb (11) 1.4 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (12) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 17, 2019, 2 a.m. 6.6 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 18.0
 
May 17, 2019, 1 a.m. 6.8 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 22.0
 
May 17, 2019, midnight 8.0 ppb (7) 1.5 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 22.0
 
May 16, 2019, 11 p.m. 5.6 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 23.0
 
May 16, 2019, 10 p.m. 5.5 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.1 ppb (1) N/A N/A 24.0
 
May 16, 2019, 9 p.m. 5.3 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 25.0
 
May 16, 2019, 8 p.m. 5.4 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 25.0
 
May 16, 2019, 7 p.m. 4.9 ppb (5) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 25.0
 
May 16, 2019, 6 p.m. 5.0 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 26.0
 
May 16, 2019, 5 p.m. 6.9 ppb (6) 2.2 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 17.0
 
May 16, 2019, 4 p.m. 12.2 ppb (11) 4.4 ppb (4) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 9.0 ppb (7) 0.1 ppb (1) N/A 6.1 μg/m3 (25) 25.0
 
May 16, 2019, 3 p.m. 22.6 ppb (21) 10.6 ppb (10) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 3.0 ppb (2) 0.2 ppb (2) N/A 7.3 μg/m3 (30) 30.0
 
May 16, 2019, 2 p.m. 30.9 ppb (29) 16.9 ppb (16) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 1.0 ppb (1) 0.2 ppb (2) N/A 9.2 μg/m3 (38) 38.0
 
May 16, 2019, 1 p.m. 22.7 ppb (21) 8.6 ppb (8) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 1.0 ppb (1) 0.2 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
May 16, 2019, noon 13.3 ppb (12) 2.5 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 2.0 ppb (2) 0.1 ppb (1) N/A 8.9 μg/m3 (37) 37.0
 
May 16, 2019, 11 a.m. 14.0 ppb (13) 2.2 ppb (2) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 10.4 μg/m3 (43) 43.0
 
May 16, 2019, 10 a.m. 12.4 ppb (11) 1.4 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 9.2 μg/m3 (38) 38.0
 
May 16, 2019, 9 a.m. 11.8 ppb (11) 1.3 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 5.0 ppb (4) 0.1 ppb (1) N/A 8.3 μg/m3 (35) 35.0
 
May 16, 2019, 8 a.m. 15.5 ppb (14) 1.3 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 5.0 ppb (4) 0.1 ppb (1) N/A 10.2 μg/m3 (42) 42.0
 
May 16, 2019, 7 a.m. 14.8 ppb (14) 1.3 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 6.0 ppb (5) 0.1 ppb (1) N/A 8.4 μg/m3 (35) 35.0
 
May 16, 2019, 6 a.m. 13.1 ppb (12) 1.6 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 7.0 ppb (5) 0.1 ppb (1) N/A 6.7 μg/m3 (28) 28.0
 
May 16, 2019, 5 a.m. 13.1 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (5) 0.2 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
May 16, 2019, 4 a.m. 14.9 ppb (14) 1.9 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 5.0 ppb (4) 0.2 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
May 16, 2019, 3 a.m. 11.1 ppb (10) 1.5 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 9.0 ppb (7) 0.2 ppb (2) N/A 5.7 μg/m3 (24) 24.0
 
May 16, 2019, 2 a.m. 9.6 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 20.0
 
May 16, 2019, 1 a.m. 11.8 ppb (11) 2.4 ppb (2) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 14.0 ppb (11) 0.2 ppb (2) N/A 4.4 μg/m3 (18) 18.0
 
May 16, 2019, midnight 9.9 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 16.0 ppb (12) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 16.0
 
May 15, 2019, 11 p.m. 6.9 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 18.0
 
May 15, 2019, 10 p.m. 7.3 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (19) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 19.0
 
May 15, 2019, 9 p.m. 7.1 ppb (7) 2.2 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 20.0
 
May 15, 2019, 8 p.m. 7.4 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 20.0
 
May 15, 2019, 7 p.m. 6.9 ppb (6) 2.6 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 21.0
 
May 15, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 2.0 μg/m3 (8) 18.0
 
May 15, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 12.0
 
May 15, 2019, 4 p.m. 20.8 ppb (19) 8.9 ppb (8) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) 0.2 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
May 15, 2019, 3 p.m. 19.8 ppb (18) 8.6 ppb (8) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (5) N/A N/A 5.7 μg/m3 (24) 24.0
 
May 15, 2019, 2 p.m. 15.7 ppb (15) 5.7 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 6.0 ppb (5) 0.1 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
May 15, 2019, 1 p.m. 11.2 ppb (10) 2.4 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 5.0 ppb (4) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
May 15, 2019, noon 11.7 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 6.0 ppb (5) 0.1 ppb (1) N/A 7.7 μg/m3 (32) 32.0
 
May 15, 2019, 11 a.m. 12.8 ppb (12) 1.3 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (5) 0.1 ppb (1) N/A 6.9 μg/m3 (29) 29.0
 
May 15, 2019, 10 a.m. 12.3 ppb (11) 1.3 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 5.0 ppb (4) 0.1 ppb (1) N/A 4.9 μg/m3 (20) 20.0
 
May 15, 2019, 9 a.m. 13.8 ppb (13) 1.6 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 4.0 ppb (3) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 18.0
 
May 15, 2019, 8 a.m. 14.5 ppb (13) 2.3 ppb (2) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 3.0 ppb (2) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 15, 2019, 7 a.m. 16.4 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 1.0 ppb (1) 0.2 ppb (2) N/A 6.3 μg/m3 (26) 26.0
 
May 15, 2019, 6 a.m. 13.4 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 3.0 ppb (2) 0.2 ppb (2) N/A 6.3 μg/m3 (26) 26.0
 
May 15, 2019, 5 a.m. 8.8 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 12.0 ppb (9) 0.1 ppb (1) N/A 4.9 μg/m3 (20) 20.0
 
May 15, 2019, 4 a.m. 6.6 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 14.0
 
May 15, 2019, 3 a.m. 4.6 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 18.0
 
May 15, 2019, 2 a.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 21.0
 
May 15, 2019, 1 a.m. 3.6 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 2.1 μg/m3 (9) 22.0
 
May 15, 2019, midnight 4.0 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 19.0
 
May 14, 2019, 11 p.m. 5.3 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 17.0
 
May 14, 2019, 10 p.m. 5.0 ppb (5) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 18.0
 
May 14, 2019, 9 p.m. 3.8 ppb (4) 1.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 20.0
 
May 14, 2019, 8 p.m. 4.1 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 18.0
 
May 14, 2019, 7 p.m. 4.9 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 17.0
 
May 14, 2019, 6 p.m. 5.2 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 17.0
 
May 14, 2019, 5 p.m. 6.3 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 17.0
 
May 14, 2019, 4 p.m. 7.6 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (15) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 15.0
 
May 14, 2019, 3 p.m. 8.6 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 14.0
 
May 14, 2019, 2 p.m. 7.4 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 15.0
 
May 14, 2019, 1 p.m. 5.5 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 17.0
 
May 14, 2019, noon 3.7 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 21.0
 
May 14, 2019, 11 a.m. 3.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 3.5 μg/m3 (15) 15.0
 
May 14, 2019, 10 a.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 3.6 μg/m3 (15) 15.0
 
May 14, 2019, 9 a.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 22.0
 
May 14, 2019, 8 a.m. 5.4 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 5.7 μg/m3 (24) 24.0
 
May 14, 2019, 7 a.m. 4.9 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 5.4 μg/m3 (23) 23.0
 
May 14, 2019, 6 a.m. 4.4 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 5.5 μg/m3 (23) 23.0
 
May 14, 2019, 5 a.m. 7.6 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 7.5 μg/m3 (31) 31.0
 
May 14, 2019, 4 a.m. 6.9 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 6.5 μg/m3 (27) 27.0
 
May 14, 2019, 3 a.m. 5.2 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
May 14, 2019, 2 a.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 6.0 μg/m3 (25) 31.0
 
May 14, 2019, 1 a.m. 4.8 ppb (4) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 6.4 μg/m3 (27) 32.0
 
May 14, 2019, midnight 4.4 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.1 ppb (1) N/A 6.0 μg/m3 (25) 33.0
 
May 13, 2019, 11 p.m. 4.6 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 30.0
 
May 13, 2019, 10 p.m. 5.5 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 6.2 μg/m3 (26) 29.0
 
May 13, 2019, 9 p.m. 5.7 ppb (5) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 27.0
 
May 13, 2019, 8 p.m. 5.1 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 6.2 μg/m3 (26) 26.0
 
May 13, 2019, 7 p.m. 5.3 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A 6.2 μg/m3 (26) 26.0
 
May 13, 2019, 6 p.m. 5.7 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A 5.7 μg/m3 (24) 25.0
 
May 13, 2019, 5 p.m. 8.4 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.1 ppb (1) N/A 6.4 μg/m3 (27) 27.0
 
May 13, 2019, 4 p.m. 9.6 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 3 p.m. 11.2 ppb (10) 2.4 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (19) 0.1 ppb (1) N/A 6.4 μg/m3 (27) 27.0
 
May 13, 2019, 2 p.m. 10.3 ppb (10) 2.1 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 1 p.m. 9.0 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (20) 0.1 ppb (1) N/A 5.5 μg/m3 (23) 23.0
 
May 13, 2019, noon 6.5 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 22.0
 
May 13, 2019, 11 a.m. 8.0 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 21.0
 
May 13, 2019, 10 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 22.0
 
May 13, 2019, 9 a.m. 9.7 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (15) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 22.0
 
May 13, 2019, 8 a.m. 9.2 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 5.4 μg/m3 (23) 23.0
 
May 13, 2019, 7 a.m. 7.8 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
May 13, 2019, 6 a.m. 5.5 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 26.0
 
May 13, 2019, 5 a.m. 5.9 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 29.0
 
May 13, 2019, 4 a.m. 6.1 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 30.0
 
May 13, 2019, 3 a.m. 5.8 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 31.0
 
May 13, 2019, 2 a.m. 5.6 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 28.0
 
May 13, 2019, 1 a.m. 5.6 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.1 ppb (1) N/A 4.6 μg/m3 (19) 25.0
 
May 13, 2019, midnight 5.3 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 4.9 μg/m3 (20) 32.0
 
May 12, 2019, 11 p.m. 5.6 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (35) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 35.0
 
May 12, 2019, 10 p.m. 5.4 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (34) 0.1 ppb (1) N/A 6.1 μg/m3 (25) 34.0
 
May 12, 2019, 9 p.m. 5.1 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 5.7 μg/m3 (24) 30.0
 
May 12, 2019, 8 p.m. 5.9 ppb (5) 2.1 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A 5.9 μg/m3 (25) 25.0
 
May 12, 2019, 7 p.m. 6.5 ppb (6) 2.4 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) 0.1 ppb (1) N/A 5.9 μg/m3 (25) 25.0
 
May 12, 2019, 6 p.m. 6.0 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.1 ppb (1) N/A 5.8 μg/m3 (24) 24.0
 
May 12, 2019, 5 p.m. 5.5 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 22.0
 
May 12, 2019, 4 p.m. 5.4 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 19.0
 
May 12, 2019, 3 p.m. 4.8 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (18) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 18.0