ID: 1236

AQSQID: 410510080

Site Name: Portland - Se Lafayette

Added: April 21, 2020, 6:24 p.m.

Updated: Sept. 21, 2021, 4:07 p.m.

Location: Portland (Foster-Powell), OR

Reporting: True, Located: True

Current AQI: 26.0

Portland (Foster-Powell) OR, US: 45.496641, -122.602877

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2021, 2 p.m. 26.6 ppb (26) 12.9 ppb (13) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 2.0 ppb (2) 0.23 ppb (3) N/A 5.9 μg/m3 (25) 26.0
 
Sept. 21, 2021, 1 p.m. 21.2 ppb (20) 6.3 ppb (6) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 1.0 ppb (1) 0.2 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
Sept. 21, 2021, noon 18.2 ppb (18) 3.0 ppb (3) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 2.0 ppb (2) 0.19 ppb (3) N/A 5.6 μg/m3 (24) 24.0
 
Sept. 21, 2021, 11 a.m. 19.6 ppb (19) 3.1 ppb (3) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 1.0 ppb (1) 0.18 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
Sept. 21, 2021, 10 a.m. 16.4 ppb (16) 1.8 ppb (2) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 3.0 ppb (3) 0.18 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
Sept. 21, 2021, 9 a.m. 14.8 ppb (14) 1.3 ppb (2) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 6.0 ppb (6) 0.18 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 21, 2021, 8 a.m. 12.8 ppb (13) 0.8 ppb (1) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 10.0 ppb (10) 0.18 ppb (3) N/A 5.6 μg/m3 (24) 24.0
 
Sept. 21, 2021, 7 a.m. 14.1 ppb (14) 1.1 ppb (2) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 11.0 ppb (11) 0.22 ppb (3) N/A 5.8 μg/m3 (25) 25.0
 
Sept. 21, 2021, 6 a.m. 14.6 ppb (14) 0.9 ppb (1) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 12.0 ppb (12) 0.23 ppb (3) N/A 6.3 μg/m3 (27) 27.0
 
Sept. 21, 2021, 5 a.m. 10.9 ppb (11) 0.7 ppb (1) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 18.0 ppb (17) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2021, 4 a.m. 10.7 ppb (11) 0.9 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 21.0 ppb (20) 0.24 ppb (3) N/A 10.1 μg/m3 (43) 43.0
 
Sept. 21, 2021, 3 a.m. 13.6 ppb (13) 1.1 ppb (2) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 20.0 ppb (19) 0.26 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 21, 2021, 2 a.m. 11.0 ppb (11) 0.6 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 23.0 ppb (22) 0.25 ppb (3) N/A 5.3 μg/m3 (23) 23.0
 
Sept. 21, 2021, 1 a.m. 6.7 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (27) 0.18 ppb (3) N/A 4.6 μg/m3 (20) 27.0
 
Sept. 21, 2021, midnight 5.6 ppb (6) 1.1 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) N/A 4.5 μg/m3 (19) 30.0
 
Sept. 20, 2021, 11 p.m. 4.8 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 4.2 μg/m3 (18) 31.0
 
Sept. 20, 2021, 10 p.m. 4.7 ppb (5) 1.4 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) N/A 4.2 μg/m3 (18) 31.0
 
Sept. 20, 2021, 9 p.m. 5.5 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 4.1 μg/m3 (18) 29.0
 
Sept. 20, 2021, 8 p.m. 7.6 ppb (8) 2.7 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (27) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 27.0
 
Sept. 20, 2021, 7 p.m. 10.7 ppb (11) 4.4 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (23) 0.19 ppb (3) N/A 7.2 μg/m3 (31) 31.0
 
Sept. 20, 2021, 6 p.m. 16.9 ppb (16) 8.5 ppb (9) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 15.0 ppb (14) 0.23 ppb (3) N/A 12.3 μg/m3 (52) 52.0
 
Sept. 20, 2021, 5 p.m. 23.9 ppb (23) 14.1 ppb (14) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 9.0 ppb (9) 0.26 ppb (4) N/A 13.7 μg/m3 (55) 55.0
 
Sept. 20, 2021, 4 p.m. 24.6 ppb (24) 11.9 ppb (12) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 3.0 ppb (3) 0.27 ppb (4) N/A 12.3 μg/m3 (52) 52.0
 
Sept. 20, 2021, 3 p.m. 34.6 ppb (33) 21.8 ppb (21) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 1.0 ppb (1) 0.32 ppb (4) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 20, 2021, 2 p.m. 34.5 ppb (33) 21.7 ppb (21) N/A 13.0 ppb (13) N/A N/A 1.0 ppb (1) 0.41 ppb (5) N/A 10.4 μg/m3 (44) 44.0
 
Sept. 20, 2021, 1 p.m. 31.1 ppb (30) 22.9 ppb (22) N/A 8.0 ppb (8) N/A N/A 1.0 ppb (1) 0.51 ppb (6) N/A 8.7 μg/m3 (37) 37.0
 
Sept. 20, 2021, noon 29.5 ppb (28) 24.7 ppb (24) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 1.0 ppb (1) 0.56 ppb (7) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 1.0 ppb (1) 0.43 ppb (5) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 20, 2021, 10 a.m. 21.9 ppb (21) 16.1 ppb (16) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 1.0 ppb (1) N/A N/A 6.2 μg/m3 (26) 26.0
 
Sept. 20, 2021, 9 a.m. 17.9 ppb (17) 11.4 ppb (11) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 1.0 ppb (1) 0.38 ppb (5) N/A 6.2 μg/m3 (26) 26.0
 
Sept. 20, 2021, 8 a.m. 16.1 ppb (16) 8.4 ppb (8) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 0.0 ppb (0) 0.43 ppb (5) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 20, 2021, 7 a.m. 14.0 ppb (14) 5.6 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 1.0 ppb (1) 0.34 ppb (4) N/A 7.7 μg/m3 (33) 33.0
 
Sept. 20, 2021, 6 a.m. 13.4 ppb (13) 3.8 ppb (4) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 2.0 ppb (2) 0.31 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 20, 2021, 5 a.m. 10.9 ppb (11) 1.5 ppb (2) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 6.0 ppb (6) 0.28 ppb (4) N/A 7.2 μg/m3 (31) 31.0
 
Sept. 20, 2021, 4 a.m. 7.3 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 12.0 ppb (12) 0.23 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
Sept. 20, 2021, 3 a.m. 8.0 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (13) 0.22 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 20, 2021, 2 a.m. 6.1 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (17) 0.22 ppb (3) N/A 4.3 μg/m3 (18) 18.0
 
Sept. 20, 2021, 1 a.m. 3.5 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (22) 0.17 ppb (3) N/A 3.6 μg/m3 (16) 22.0
 
Sept. 20, 2021, midnight 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (25) 0.16 ppb (3) N/A 2.8 μg/m3 (12) 25.0
 
Sept. 19, 2021, 11 p.m. 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.16 ppb (3) N/A 3.3 μg/m3 (14) 25.0
 
Sept. 19, 2021, 10 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 28.0
 
Sept. 19, 2021, 9 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.15 ppb (2) N/A 3.3 μg/m3 (14) 26.0
 
Sept. 19, 2021, 8 p.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 29.0
 
Sept. 19, 2021, 7 p.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 2.9 μg/m3 (13) 27.0
 
Sept. 19, 2021, 6 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) 0.16 ppb (3) N/A 3.2 μg/m3 (14) 25.0
 
Sept. 19, 2021, 5 p.m. 2.5 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) 0.16 ppb (3) N/A 2.8 μg/m3 (12) 23.0
 
Sept. 19, 2021, 4 p.m. 2.7 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.15 ppb (2) N/A 2.2 μg/m3 (10) 21.0
 
Sept. 19, 2021, 3 p.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (22) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 22.0
 
Sept. 19, 2021, 2 p.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.14 ppb (2) N/A 1.7 μg/m3 (8) 25.0
 
Sept. 19, 2021, 1 p.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (21) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 21.0
 
Sept. 19, 2021, noon 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (22) 0.15 ppb (2) N/A 2.2 μg/m3 (10) 22.0
 
Sept. 19, 2021, 11 a.m. 3.5 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (21) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 21.0
 
Sept. 19, 2021, 10 a.m. 3.9 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (25) 0.16 ppb (3) N/A 2.1 μg/m3 (9) 25.0
 
Sept. 19, 2021, 9 a.m. 2.8 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 2.3 μg/m3 (10) 29.0
 
Sept. 19, 2021, 8 a.m. 1.5 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 27.0
 
Sept. 19, 2021, 7 a.m. 1.6 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 3.3 μg/m3 (14) 27.0
 
Sept. 19, 2021, 6 a.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 19, 2021, 5 a.m. 2.6 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Sept. 19, 2021, 4 a.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (23) 0.16 ppb (3) N/A 3.6 μg/m3 (16) 23.0
 
Sept. 19, 2021, 3 a.m. 4.4 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) N/A 3.3 μg/m3 (14) 23.0
 
Sept. 19, 2021, 2 a.m. 3.3 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.16 ppb (3) N/A 2.8 μg/m3 (12) 26.0
 
Sept. 19, 2021, 1 a.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.16 ppb (3) N/A 2.9 μg/m3 (13) 28.0
 
Sept. 19, 2021, midnight 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 2.6 μg/m3 (11) 32.0
 
Sept. 18, 2021, 11 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) N/A 3.4 μg/m3 (15) 32.0
 
Sept. 18, 2021, 10 p.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.13 ppb (2) N/A 3.5 μg/m3 (15) 32.0
 
Sept. 18, 2021, 9 p.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.13 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
Sept. 18, 2021, 8 p.m. 3.5 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 2.9 μg/m3 (13) 32.0
 
Sept. 18, 2021, 7 p.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.14 ppb (2) N/A 2.4 μg/m3 (10) 33.0
 
Sept. 18, 2021, 6 p.m. 2.7 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.13 ppb (2) N/A 1.9 μg/m3 (8) 38.0
 
Sept. 18, 2021, 5 p.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.12 ppb (2) N/A 1.5 μg/m3 (7) 39.0
 
Sept. 18, 2021, 4 p.m. 2.1 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) 0.11 ppb (2) N/A 1.6 μg/m3 (7) 40.0
 
Sept. 18, 2021, 3 p.m. 2.8 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.11 ppb (2) N/A 1.8 μg/m3 (8) 38.0
 
Sept. 18, 2021, 2 p.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) N/A 2.0 μg/m3 (9) 31.0
 
Sept. 18, 2021, 1 p.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) 0.11 ppb (2) N/A 1.9 μg/m3 (8) 30.0
 
Sept. 18, 2021, noon 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.11 ppb (2) N/A 1.7 μg/m3 (8) 33.0
 
Sept. 18, 2021, 11 a.m. 2.0 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.1 ppb (2) N/A 1.7 μg/m3 (8) 35.0
 
Sept. 18, 2021, 10 a.m. 2.2 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.1 ppb (2) N/A 1.7 μg/m3 (8) 35.0
 
Sept. 18, 2021, 9 a.m. 2.4 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.11 ppb (2) N/A 1.7 μg/m3 (8) 35.0
 
Sept. 18, 2021, 8 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 1.6 μg/m3 (7) 32.0
 
Sept. 18, 2021, 7 a.m. 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 1.4 μg/m3 (6) 26.0
 
Sept. 18, 2021, 6 a.m. 0.8 ppb (1) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.06 ppb (2) N/A 3.2 μg/m3 (14) 19.0
 
Sept. 18, 2021, 5 a.m. 1.1 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.07 ppb (2) N/A 1.9 μg/m3 (8) 19.0
 
Sept. 18, 2021, 4 a.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.07 ppb (2) N/A 1.7 μg/m3 (8) 19.0
 
Sept. 18, 2021, 3 a.m. 1.4 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 20.0 ppb (19) 0.08 ppb (2) N/A 1.7 μg/m3 (8) 19.0
 
Sept. 18, 2021, 2 a.m. 1.7 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 20.0 ppb (19) 0.08 ppb (2) N/A 2.2 μg/m3 (10) 19.0
 
Sept. 18, 2021, 1 a.m. 3.2 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 24.0 ppb (23) 0.11 ppb (2) N/A 3.2 μg/m3 (14) 23.0
 
Sept. 18, 2021, midnight 2.9 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 30.0 ppb (28) 0.13 ppb (2) N/A 3.8 μg/m3 (16) 28.0
 
Sept. 17, 2021, 11 p.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) 0.15 ppb (2) N/A 6.3 μg/m3 (27) 35.0
 
Sept. 17, 2021, 10 p.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) 0.21 ppb (3) N/A 11.8 μg/m3 (50) 50.0
 
Sept. 17, 2021, 9 p.m. 2.7 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 51.0 ppb (48) 0.29 ppb (4) N/A 23.6 μg/m3 (76) 76.0
 
Sept. 17, 2021, 8 p.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 48.0 ppb (45) 0.28 ppb (4) N/A 22.7 μg/m3 (74) 74.0
 
Sept. 17, 2021, 7 p.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) 0.28 ppb (4) N/A 20.1 μg/m3 (68) 68.0
 
Sept. 17, 2021, 6 p.m. 5.3 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.31 ppb (4) N/A 22.4 μg/m3 (73) 73.0
 
Sept. 17, 2021, 5 p.m. 8.7 ppb (9) 1.3 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 27.0 ppb (25) 0.36 ppb (5) N/A 23.6 μg/m3 (76) 76.0
 
Sept. 17, 2021, 4 p.m. 7.5 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (23) 0.41 ppb (5) N/A 27.5 μg/m3 (84) 84.0
 
Sept. 17, 2021, 3 p.m. 18.9 ppb (18) 4.1 ppb (4) N/A 15.0 ppb (15) N/A 1.0 ppb (2) 15.0 ppb (14) 0.46 ppb (6) N/A 23.7 μg/m3 (76) 76.0
 
Sept. 17, 2021, 2 p.m. 22.1 ppb (21) 2.7 ppb (3) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 7.0 ppb (7) N/A N/A 15.1 μg/m3 (58) 58.0
 
Sept. 17, 2021, 1 p.m. 15.1 ppb (15) 0.7 ppb (1) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 9.0 ppb (9) 0.35 ppb (4) N/A 11.6 μg/m3 (49) 49.0
 
Sept. 17, 2021, noon 13.0 ppb (13) 0.6 ppb (1) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 9.0 ppb (9) 0.38 ppb (5) N/A 10.4 μg/m3 (44) 44.0
 
Sept. 17, 2021, 11 a.m. 9.3 ppb (9) 0.4 ppb (1) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 15.0 ppb (14) 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 10 a.m. 8.2 ppb (8) 0.3 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 6.3 μg/m3 (27) 27.0
 
Sept. 17, 2021, 9 a.m. 5.2 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.22 ppb (3) N/A 5.3 μg/m3 (23) 24.0
 
Sept. 17, 2021, 8 a.m. 3.3 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.21 ppb (3) N/A 4.7 μg/m3 (20) 33.0
 
Sept. 17, 2021, 7 a.m. 2.8 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.21 ppb (3) N/A 4.9 μg/m3 (21) 35.0
 
Sept. 17, 2021, 6 a.m. 2.9 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.2 μg/m3 (18) 35.0
 
Sept. 17, 2021, 5 a.m. 3.5 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (34) 0.21 ppb (3) N/A 3.5 μg/m3 (15) 34.0
 
Sept. 17, 2021, 4 a.m. 4.2 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (33) 0.21 ppb (3) N/A 3.3 μg/m3 (14) 33.0
 
Sept. 17, 2021, 3 a.m. 6.1 ppb (6) 0.3 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (31) 0.24 ppb (3) N/A 3.7 μg/m3 (16) 31.0
 
Sept. 17, 2021, 2 a.m. 5.8 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 3.5 μg/m3 (15) 32.0
 
Sept. 17, 2021, 1 a.m. 5.3 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 36.0 ppb (34) 0.27 ppb (4) N/A 5.1 μg/m3 (22) 34.0
 
Sept. 17, 2021, midnight 4.5 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 39.0 ppb (37) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 37.0
 
Sept. 16, 2021, 11 p.m. 2.5 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 39.0 ppb (37) 0.17 ppb (3) N/A 4.4 μg/m3 (19) 37.0
 
Sept. 16, 2021, 10 p.m. 3.9 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 39.0 ppb (37) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 37.0
 
Sept. 16, 2021, 9 p.m. 6.3 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) N/A 4.9 μg/m3 (21) 33.0
 
Sept. 16, 2021, 8 p.m. 7.6 ppb (8) 2.7 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 30.0 ppb (28) 0.19 ppb (3) N/A 4.7 μg/m3 (20) 28.0
 
Sept. 16, 2021, 7 p.m. 11.3 ppb (11) 4.9 ppb (5) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 22.0 ppb (21) 0.18 ppb (3) N/A 4.1 μg/m3 (18) 21.0
 
Sept. 16, 2021, 6 p.m. 11.2 ppb (11) 5.1 ppb (5) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 20.0 ppb (19) 0.18 ppb (3) N/A 3.8 μg/m3 (16) 19.0
 
Sept. 16, 2021, 5 p.m. 18.3 ppb (18) 8.8 ppb (9) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 17.0 ppb (16) 0.22 ppb (3) N/A 4.6 μg/m3 (20) 20.0
 
Sept. 16, 2021, 4 p.m. 23.9 ppb (23) 12.1 ppb (12) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 12.0 ppb (12) 0.28 ppb (4) N/A 4.6 μg/m3 (20) 23.0
 
Sept. 16, 2021, 3 p.m. 38.8 ppb (37) 22.6 ppb (22) N/A 16.0 ppb (16) N/A 1.0 ppb (2) 6.0 ppb (6) 0.4 ppb (5) N/A 5.7 μg/m3 (24) 37.0
 
Sept. 16, 2021, 2 p.m. 35.0 ppb (34) 19.2 ppb (19) N/A 16.0 ppb (16) N/A 1.0 ppb (2) 2.0 ppb (2) 0.42 ppb (5) N/A 5.2 μg/m3 (22) 34.0
 
Sept. 16, 2021, 1 p.m. 26.5 ppb (25) 12.5 ppb (12) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 1.0 ppb (1) 0.48 ppb (6) N/A 5.0 μg/m3 (21) 25.0
 
Sept. 16, 2021, noon 19.3 ppb (19) 5.4 ppb (6) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 1.0 ppb (1) 0.37 ppb (5) N/A 4.8 μg/m3 (20) 20.0
 
Sept. 16, 2021, 11 a.m. 17.9 ppb (17) 4.3 ppb (5) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 2.0 ppb (2) 0.38 ppb (5) N/A 4.8 μg/m3 (20) 20.0
 
Sept. 16, 2021, 10 a.m. 14.1 ppb (14) 1.4 ppb (2) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 3.0 ppb (3) 0.32 ppb (4) N/A 4.6 μg/m3 (20) 20.0
 
Sept. 16, 2021, 9 a.m. 9.5 ppb (9) 0.5 ppb (1) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 8.0 ppb (8) 0.25 ppb (3) N/A 3.8 μg/m3 (16) 16.0
 
Sept. 16, 2021, 8 a.m. 6.3 ppb (6) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) N/A 4.5 μg/m3 (19) 19.0
 
Sept. 16, 2021, 7 a.m. 5.7 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (21) 0.23 ppb (3) N/A 3.6 μg/m3 (16) 21.0
 
Sept. 16, 2021, 6 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (25) 0.21 ppb (3) N/A 3.1 μg/m3 (13) 25.0
 
Sept. 16, 2021, 5 a.m. 3.7 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (25) 0.18 ppb (3) N/A 3.1 μg/m3 (13) 25.0
 
Sept. 16, 2021, 4 a.m. 4.6 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (24) 0.18 ppb (3) N/A 3.4 μg/m3 (15) 24.0
 
Sept. 16, 2021, 3 a.m. 3.7 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Sept. 16, 2021, 2 a.m. 2.8 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 2.6 μg/m3 (11) 28.0
 
Sept. 16, 2021, 1 a.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 2.8 μg/m3 (12) 29.0
 
Sept. 16, 2021, midnight 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 2.5 μg/m3 (11) 31.0
 
Sept. 15, 2021, 11 p.m. 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 31.0
 
Sept. 15, 2021, 10 p.m. 2.7 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 3.4 μg/m3 (15) 31.0
 
Sept. 15, 2021, 9 p.m. 2.7 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 3.1 μg/m3 (13) 32.0
 
Sept. 15, 2021, 8 p.m. 2.5 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 3.3 μg/m3 (14) 33.0
 
Sept. 15, 2021, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 3.1 μg/m3 (13) 34.0
 
Sept. 15, 2021, 6 p.m. 3.7 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.13 ppb (2) N/A 3.3 μg/m3 (14) 34.0
 
Sept. 15, 2021, 5 p.m. 3.8 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 3.6 μg/m3 (16) 32.0
 
Sept. 15, 2021, 4 p.m. 4.3 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 3.2 μg/m3 (14) 32.0
 
Sept. 15, 2021, 3 p.m. 4.7 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 3.1 μg/m3 (13) 32.0
 
Sept. 15, 2021, 2 p.m. 5.4 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (28) 0.12 ppb (2) N/A 3.2 μg/m3 (14) 28.0
 
Sept. 15, 2021, 1 p.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) 0.08 ppb (2) N/A 2.5 μg/m3 (11) 30.0
 
Sept. 15, 2021, noon 2.8 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.07 ppb (2) N/A 2.0 μg/m3 (9) 26.0
 
Sept. 15, 2021, 11 a.m. 2.0 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) 0.06 ppb (2) N/A 1.6 μg/m3 (7) 26.0
 
Sept. 15, 2021, 10 a.m. 3.1 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (21) 0.08 ppb (2) N/A 1.9 μg/m3 (8) 21.0
 
Sept. 15, 2021, 9 a.m. 8.3 ppb (8) 0.4 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 17.0 ppb (16) 0.09 ppb (2) N/A 3.6 μg/m3 (16) 16.0
 
Sept. 15, 2021, 8 a.m. 8.2 ppb (8) 0.4 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 18.0 ppb (17) 0.1 ppb (2) N/A 3.1 μg/m3 (13) 17.0
 
Sept. 15, 2021, 7 a.m. 11.1 ppb (11) 0.4 ppb (1) N/A 11.0 ppb (11) N/A 1.0 ppb (2) 16.0 ppb (15) 0.12 ppb (2) N/A 3.2 μg/m3 (14) 15.0
 
Sept. 15, 2021, 6 a.m. 7.4 ppb (7) 0.4 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (19) 0.13 ppb (2) N/A 2.8 μg/m3 (12) 19.0
 
Sept. 15, 2021, 5 a.m. 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (23) 0.12 ppb (2) N/A 2.5 μg/m3 (11) 23.0
 
Sept. 15, 2021, 4 a.m. 3.9 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.1 ppb (2) N/A 2.4 μg/m3 (10) 24.0
 
Sept. 15, 2021, 3 a.m. 5.8 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.12 ppb (2) N/A 3.3 μg/m3 (14) 24.0
 
Sept. 15, 2021, 2 a.m. 7.0 ppb (7) 0.6 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 4.2 μg/m3 (18) 27.0
 
Sept. 15, 2021, 1 a.m. 5.9 ppb (6) 0.5 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) N/A 4.7 μg/m3 (20) 39.0
 
Sept. 15, 2021, midnight 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 46.0 ppb (43) 0.15 ppb (2) N/A 4.6 μg/m3 (20) 43.0
 
Sept. 14, 2021, 11 p.m. 7.4 ppb (7) 1.3 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 44.0 ppb (41) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 41.0
 
Sept. 14, 2021, 10 p.m. 8.2 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 40.0 ppb (38) 0.16 ppb (3) N/A 4.8 μg/m3 (20) 38.0
 
Sept. 14, 2021, 9 p.m. 9.8 ppb (10) 2.7 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 37.0 ppb (35) 0.16 ppb (3) N/A 4.9 μg/m3 (21) 35.0
 
Sept. 14, 2021, 8 p.m. 12.2 ppb (12) 3.8 ppb (4) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 33.0 ppb (31) 0.17 ppb (3) N/A 5.5 μg/m3 (23) 31.0
 
Sept. 14, 2021, 7 p.m. 12.1 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 30.0 ppb (28) 0.17 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
Sept. 14, 2021, 6 p.m. 12.8 ppb (13) 4.6 ppb (5) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 26.0 ppb (25) 0.19 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Sept. 14, 2021, 5 p.m. 14.2 ppb (14) 5.6 ppb (6) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (19) 0.18 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Sept. 14, 2021, 4 p.m. 19.3 ppb (19) 8.5 ppb (9) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 16.0 ppb (15) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, 3 p.m. 24.1 ppb (23) 11.4 ppb (11) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 8.0 ppb (8) 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0