AQSQID: 295100086

Site Name: Mrgretta

Location: St. Louis (Margaretta Ave), MO

Reporting: True, Located: True

Current AQI: 9.0

St. Louis (Margaretta Ave) MO, US: 38.673221, -90.239166

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2019, 11 p.m. 9.2 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (7) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 9.0
 
Jan. 21, 2019, 10 p.m. 10.0 ppb (9) 1.1 ppb (1) N/A 9.0 ppb (8) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 9.0
 
Jan. 21, 2019, 9 p.m. 10.8 ppb (10) 1.7 ppb (2) N/A 9.0 ppb (8) N/A 4.0 ppb (6) N/A N/A 6.0 μg/m3 (5) N/A 10.0
 
Jan. 21, 2019, 8 p.m. 11.0 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A 4.0 ppb (6) N/A N/A 5.0 μg/m3 (5) N/A 10.0
 
Jan. 21, 2019, 7 p.m. 9.8 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 4.0 ppb (6) N/A N/A 5.0 μg/m3 (5) N/A 9.0
 
Jan. 21, 2019, 6 p.m. 9.2 ppb (9) 2.6 ppb (2) N/A 6.0 ppb (6) N/A 4.0 ppb (6) N/A N/A 4.0 μg/m3 (4) N/A 9.0
 
Jan. 21, 2019, 5 p.m. 10.1 ppb (9) 3.3 ppb (3) N/A 7.0 ppb (6) N/A 4.0 ppb (6) N/A N/A 4.0 μg/m3 (4) N/A 9.0
 
Jan. 21, 2019, 4 p.m. 11.9 ppb (11) 4.2 ppb (4) N/A 8.0 ppb (7) N/A 4.0 ppb (6) N/A N/A 5.0 μg/m3 (5) N/A 11.0
 
Jan. 21, 2019, 3 p.m. 15.2 ppb (14) 4.8 ppb (4) N/A 10.0 ppb (9) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 14.0
 
Jan. 21, 2019, 2 p.m. 16.9 ppb (16) 4.1 ppb (4) N/A 13.0 ppb (12) N/A 3.0 ppb (4) N/A N/A 7.0 μg/m3 (6) N/A 16.0
 
Jan. 21, 2019, 1 p.m. 14.0 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 13.0
 
Jan. 21, 2019, noon 27.0 ppb (25) 10.3 ppb (10) N/A 17.0 ppb (16) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 25.0
 
Jan. 21, 2019, 11 a.m. 20.0 ppb (19) 1.9 ppb (2) N/A 18.0 ppb (17) N/A 3.0 ppb (4) N/A N/A 7.0 μg/m3 (6) N/A 19.0
 
Jan. 21, 2019, 10 a.m. 15.1 ppb (14) 1.5 ppb (1) N/A 14.0 ppb (13) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 14.0
 
Jan. 21, 2019, 9 a.m. 21.4 ppb (20) 2.1 ppb (2) N/A 19.0 ppb (18) N/A 3.0 ppb (4) N/A N/A 8.0 μg/m3 (7) N/A 20.0
 
Jan. 21, 2019, 8 a.m. 19.0 ppb (18) 1.6 ppb (1) N/A 17.0 ppb (16) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 18.0
 
Jan. 21, 2019, 7 a.m. 15.4 ppb (14) 1.5 ppb (1) N/A 14.0 ppb (13) N/A 3.0 ppb (4) N/A N/A 7.0 μg/m3 (6) N/A 14.0
 
Jan. 21, 2019, 6 a.m. 14.2 ppb (13) 1.6 ppb (1) N/A 13.0 ppb (12) N/A 3.0 ppb (4) N/A N/A 5.0 μg/m3 (5) N/A 13.0
 
Jan. 21, 2019, 5 a.m. 13.3 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A 3.0 ppb (4) N/A N/A 5.0 μg/m3 (5) N/A 12.0
 
Jan. 21, 2019, 4 a.m. 11.6 ppb (11) 1.3 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 11.0
 
Jan. 21, 2019, 3 a.m. 8.9 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 8.0
 
Jan. 21, 2019, 2 a.m. 10.1 ppb (9) 1.8 ppb (2) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 9.0
 
Jan. 21, 2019, 1 a.m. 9.0 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 8.0
 
Jan. 21, 2019, midnight 10.0 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 9.0
 
Jan. 20, 2019, 11 p.m. 9.5 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 9.0
 
Jan. 20, 2019, 10 p.m. 13.1 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 12.0
 
Jan. 20, 2019, 9 p.m. 7.4 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 7.0
 
Jan. 20, 2019, 8 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Jan. 20, 2019, 7 p.m. 9.3 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 9.0
 
Jan. 20, 2019, 6 p.m. 10.8 ppb (10) 2.6 ppb (2) N/A 8.0 ppb (7) N/A 3.0 ppb (4) N/A N/A 6.0 μg/m3 (5) N/A 10.0
 
Jan. 20, 2019, 5 p.m. 8.9 ppb (8) 3.1 ppb (3) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 8.0
 
Jan. 20, 2019, 4 p.m. 8.1 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 8.0
 
Jan. 20, 2019, 3 p.m. 7.9 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 7.0
 
Jan. 20, 2019, 2 p.m. 8.4 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 8.0
 
Jan. 20, 2019, 1 p.m. 8.3 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Jan. 20, 2019, noon 8.3 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Jan. 20, 2019, 11 a.m. 7.4 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 7.0
 
Jan. 20, 2019, 10 a.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
Jan. 20, 2019, 9 a.m. 5.5 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Jan. 20, 2019, 8 a.m. 6.4 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Jan. 20, 2019, 7 a.m. 5.4 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Jan. 20, 2019, 6 a.m. 5.2 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 5.0
 
Jan. 20, 2019, 5 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 4.0
 
Jan. 20, 2019, 4 a.m. 4.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Jan. 20, 2019, 3 a.m. 5.1 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 13.0 μg/m3 (12) N/A 12.0
 
Jan. 20, 2019, 2 a.m. 5.1 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
Jan. 20, 2019, 1 a.m. 4.9 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 5.0
 
Jan. 20, 2019, midnight 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
Jan. 19, 2019, 11 p.m. 5.6 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Jan. 19, 2019, 10 p.m. 6.4 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Jan. 19, 2019, 9 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Jan. 19, 2019, 8 p.m. 7.9 ppb (7) 1.3 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Jan. 19, 2019, 7 p.m. 7.1 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 7.0
 
Jan. 19, 2019, 6 p.m. 7.9 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 7.0
 
Jan. 19, 2019, 5 p.m. 9.2 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 9.0
 
Jan. 19, 2019, 4 p.m. 9.2 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 9.0
 
Jan. 19, 2019, 3 p.m. 7.5 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 7.0
 
Jan. 19, 2019, 2 p.m. 6.6 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 6.0
 
Jan. 19, 2019, 1 p.m. 7.1 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 7.0
 
Jan. 19, 2019, noon 6.5 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 2.0 μg/m3 (2) N/A 6.0
 
Jan. 19, 2019, 11 a.m. 7.1 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 3.0 μg/m3 (3) N/A 7.0
 
Jan. 19, 2019, 10 a.m. 6.0 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A 0.0 μg/m3 (0) N/A 6.0
 
Jan. 19, 2019, 9 a.m. 9.4 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 2.0 μg/m3 (2) N/A 9.0
 
Jan. 19, 2019, 8 a.m. 14.7 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A 2.0 ppb (3) N/A N/A 3.0 μg/m3 (3) N/A 14.0
 
Jan. 19, 2019, 7 a.m. 17.7 ppb (16) 2.7 ppb (3) N/A 15.0 ppb (14) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 16.0
 
Jan. 19, 2019, 6 a.m. 11.5 ppb (11) 1.0 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 1.0 μg/m3 (1) N/A 11.0
 
Jan. 19, 2019, 5 a.m. 14.0 ppb (13) 1.8 ppb (2) N/A 12.0 ppb (11) N/A 2.0 ppb (3) N/A N/A 15.0 μg/m3 (14) N/A 14.0
 
Jan. 19, 2019, 4 a.m. 12.1 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 11.0
 
Jan. 19, 2019, 3 a.m. 9.0 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Jan. 19, 2019, 2 a.m. 7.9 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 7.0
 
Jan. 19, 2019, 1 a.m. 9.2 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 9.0
 
Jan. 19, 2019, midnight 10.2 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 9.0
 
Jan. 18, 2019, 11 p.m. 10.3 ppb (10) 1.1 ppb (1) N/A 9.0 ppb (8) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 10.0
 
Jan. 18, 2019, 10 p.m. 11.5 ppb (11) 0.9 ppb (1) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 11.0 μg/m3 (10) N/A 11.0
 
Jan. 18, 2019, 9 p.m. 11.4 ppb (11) 1.2 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 11.0 μg/m3 (10) N/A 11.0
 
Jan. 18, 2019, 8 p.m. 11.9 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) N/A 13.0
 
Jan. 18, 2019, 7 p.m. 11.5 ppb (11) 2.1 ppb (2) N/A 9.0 ppb (8) N/A 3.0 ppb (4) N/A N/A 11.0 μg/m3 (10) N/A 11.0
 
Jan. 18, 2019, 6 p.m. 12.7 ppb (12) 2.9 ppb (3) N/A 10.0 ppb (9) N/A 4.0 ppb (6) N/A N/A 10.0 μg/m3 (9) N/A 12.0
 
Jan. 18, 2019, 5 p.m. 16.5 ppb (15) 3.5 ppb (3) N/A 13.0 ppb (12) N/A 3.0 ppb (4) N/A N/A 9.0 μg/m3 (8) N/A 15.0
 
Jan. 18, 2019, 4 p.m. 18.0 ppb (17) 3.5 ppb (3) N/A 15.0 ppb (14) N/A 2.0 ppb (3) N/A N/A 12.0 μg/m3 (11) N/A 17.0
 
Jan. 18, 2019, 3 p.m. 19.6 ppb (18) 3.4 ppb (3) N/A 16.0 ppb (15) N/A 2.0 ppb (3) N/A N/A 13.0 μg/m3 (12) N/A 18.0
 
Jan. 18, 2019, 2 p.m. 22.3 ppb (21) 4.0 ppb (4) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) N/A 21.0
 
Jan. 18, 2019, 1 p.m. 23.0 ppb (21) 2.4 ppb (2) N/A 21.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 12.0 μg/m3 (11) N/A 21.0
 
Jan. 18, 2019, noon 18.4 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 17.0
 
Jan. 18, 2019, 11 a.m. 8.3 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 8.0
 
Jan. 18, 2019, 10 a.m. 7.2 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 7.0
 
Jan. 18, 2019, 9 a.m. 7.6 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 7.0
 
Jan. 18, 2019, 8 a.m. 9.3 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 9.0
 
Jan. 18, 2019, 7 a.m. 11.5 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 11.0
 
Jan. 18, 2019, 6 a.m. 11.6 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 11.0
 
Jan. 18, 2019, 5 a.m. 10.5 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 10.0
 
Jan. 18, 2019, 4 a.m. 10.9 ppb (10) 1.1 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 10.0
 
Jan. 18, 2019, 3 a.m. 14.4 ppb (13) 1.1 ppb (1) N/A 13.0 ppb (12) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 13.0
 
Jan. 18, 2019, 2 a.m. 13.0 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 12.0
 
Jan. 18, 2019, 1 a.m. 13.9 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 13.0
 
Jan. 18, 2019, midnight 15.8 ppb (15) 1.1 ppb (1) N/A 15.0 ppb (14) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 15.0
 
Jan. 17, 2019, 11 p.m. 19.3 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (16) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 18.0
 
Jan. 17, 2019, 10 p.m. 22.2 ppb (21) 4.6 ppb (4) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A 11.0 μg/m3 (10) N/A 21.0
 
Jan. 17, 2019, 9 p.m. 17.7 ppb (16) 4.4 ppb (4) N/A 13.0 ppb (12) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 16.0
 
Jan. 17, 2019, 8 p.m. 14.6 ppb (14) 3.7 ppb (3) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 14.0
 
Jan. 17, 2019, 7 p.m. 19.0 ppb (18) 7.2 ppb (7) N/A 12.0 ppb (11) N/A 2.0 ppb (3) N/A N/A 10.0 μg/m3 (9) N/A 18.0
 
Jan. 17, 2019, 6 p.m. 27.7 ppb (26) 13.4 ppb (12) N/A 14.0 ppb (13) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 26.0
 
Jan. 17, 2019, 5 p.m. 35.5 ppb (33) 18.8 ppb (17) N/A 17.0 ppb (16) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) N/A 33.0
 
Jan. 17, 2019, 4 p.m. 60.4 ppb (57) 38.9 ppb (36) N/A 22.0 ppb (20) N/A 2.0 ppb (3) N/A N/A 15.0 μg/m3 (14) N/A 57.0
 
Jan. 17, 2019, 3 p.m. 68.1 ppb (65) 46.0 ppb (43) N/A 22.0 ppb (20) N/A 2.0 ppb (3) N/A N/A 12.0 μg/m3 (11) N/A 65.0
 
Jan. 17, 2019, 2 p.m. 62.7 ppb (59) 40.3 ppb (37) N/A 23.0 ppb (21) N/A 2.0 ppb (3) N/A N/A 11.0 μg/m3 (10) N/A 59.0
 
Jan. 17, 2019, 1 p.m. 45.4 ppb (42) 24.0 ppb (22) N/A 22.0 ppb (20) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 42.0
 
Jan. 17, 2019, noon 48.9 ppb (45) 26.3 ppb (24) N/A 23.0 ppb (21) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 45.0
 
Jan. 17, 2019, 11 a.m. 42.9 ppb (40) 19.8 ppb (18) N/A 23.0 ppb (21) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 40.0
 
Jan. 17, 2019, 10 a.m. 46.9 ppb (43) 22.3 ppb (21) N/A 25.0 ppb (23) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 43.0
 
Jan. 17, 2019, 9 a.m. 50.0 ppb (46) 24.2 ppb (22) N/A 26.0 ppb (24) N/A 2.0 ppb (3) N/A N/A 10.0 μg/m3 (9) N/A 46.0
 
Jan. 17, 2019, 8 a.m. 45.1 ppb (42) 18.3 ppb (17) N/A 27.0 ppb (25) N/A 2.0 ppb (3) N/A N/A 12.0 μg/m3 (11) N/A 42.0
 
Jan. 17, 2019, 7 a.m. 40.0 ppb (37) 12.7 ppb (12) N/A 27.0 ppb (25) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) N/A 37.0
 
Jan. 17, 2019, 6 a.m. 35.4 ppb (33) 7.5 ppb (7) N/A 28.0 ppb (26) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 33.0
 
Jan. 17, 2019, 5 a.m. 30.6 ppb (28) 3.8 ppb (4) N/A 27.0 ppb (25) N/A 2.0 ppb (3) N/A N/A N/A N/A 28.0
 
Jan. 17, 2019, 4 a.m. 26.1 ppb (24) 2.2 ppb (2) N/A 24.0 ppb (22) N/A 2.0 ppb (3) N/A N/A N/A N/A 24.0
 
Jan. 17, 2019, 3 a.m. 23.1 ppb (21) 1.9 ppb (2) N/A 21.0 ppb (19) N/A 2.0 ppb (3) N/A N/A N/A N/A 21.0
 
Jan. 17, 2019, 2 a.m. 23.9 ppb (22) 2.2 ppb (2) N/A 22.0 ppb (20) N/A 2.0 ppb (3) N/A N/A N/A N/A 22.0
 
Jan. 17, 2019, 1 a.m. 28.9 ppb (27) 3.2 ppb (3) N/A 26.0 ppb (24) N/A 2.0 ppb (3) N/A N/A 15.0 μg/m3 (14) N/A 27.0
 
Jan. 17, 2019, midnight 42.2 ppb (39) 10.1 ppb (9) N/A 32.0 ppb (30) N/A 2.0 ppb (3) N/A N/A 16.0 μg/m3 (15) N/A 39.0
 
Jan. 16, 2019, 11 p.m. 50.6 ppb (47) 15.4 ppb (14) N/A 35.0 ppb (32) N/A 2.0 ppb (3) N/A N/A N/A N/A 47.0
 
Jan. 16, 2019, 10 p.m. 39.8 ppb (37) 8.6 ppb (8) N/A 31.0 ppb (29) N/A 2.0 ppb (3) N/A N/A N/A N/A 37.0
 
Jan. 16, 2019, 9 p.m. 34.2 ppb (32) 9.2 ppb (9) N/A 25.0 ppb (23) N/A 2.0 ppb (3) N/A N/A N/A N/A 32.0
 
Jan. 16, 2019, 8 p.m. 31.8 ppb (29) 7.2 ppb (7) N/A 25.0 ppb (23) N/A 2.0 ppb (3) N/A N/A N/A N/A 29.0
 
Jan. 16, 2019, 7 p.m. 21.1 ppb (20) 5.2 ppb (5) N/A 16.0 ppb (15) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 20.0
 
Jan. 16, 2019, 6 p.m. 21.7 ppb (20) 6.6 ppb (6) N/A 15.0 ppb (14) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 20.0
 
Jan. 16, 2019, 5 p.m. 18.4 ppb (17) 4.8 ppb (4) N/A 14.0 ppb (13) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 17.0
 
Jan. 16, 2019, 4 p.m. 21.3 ppb (20) 5.3 ppb (5) N/A 16.0 ppb (15) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 20.0
 
Jan. 16, 2019, 3 p.m. 17.5 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 16.0
 
Jan. 16, 2019, 2 p.m. 25.9 ppb (24) 6.0 ppb (6) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 24.0
 
Jan. 16, 2019, 1 p.m. 26.9 ppb (25) 5.8 ppb (5) N/A 21.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 25.0
 
Jan. 16, 2019, noon 20.5 ppb (19) 2.6 ppb (2) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 19.0
 
Jan. 16, 2019, 11 a.m. 20.8 ppb (19) 3.2 ppb (3) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 19.0
 
Jan. 16, 2019, 10 a.m. 27.6 ppb (26) 4.0 ppb (4) N/A 24.0 ppb (22) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 26.0
 
Jan. 16, 2019, 9 a.m. 23.2 ppb (21) 2.7 ppb (3) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 21.0
 
Jan. 16, 2019, 8 a.m. 23.5 ppb (22) 2.5 ppb (2) N/A 21.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 22.0
 
Jan. 16, 2019, 7 a.m. 17.1 ppb (16) 1.6 ppb (1) N/A 16.0 ppb (15) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 16.0
 
Jan. 16, 2019, 6 a.m. 11.9 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 11.0
 
Jan. 16, 2019, 5 a.m. 12.7 ppb (12) 1.2 ppb (1) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 12.0
 
Jan. 16, 2019, 4 a.m. 11.7 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 11.0
 
Jan. 16, 2019, 3 a.m. 9.2 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) N/A 9.0
 
Jan. 16, 2019, 2 a.m. 10.7 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 10.0
 
Jan. 16, 2019, 1 a.m. 11.2 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) N/A 10.0
 
Jan. 16, 2019, midnight 10.9 ppb (10) 1.1 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) N/A 10.0
 
Jan. 15, 2019, 11 p.m. 12.1 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) N/A 11.0
 
Jan. 15, 2019, 10 p.m. 11.3 ppb (10) 1.7 ppb (2) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 11.0 μg/m3 (10) N/A 10.0
 
Jan. 15, 2019, 9 p.m. 11.2 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) N/A 10.0
 
Jan. 15, 2019, 8 p.m. 11.0 ppb (10) 2.6 ppb (2) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 3.0 μg/m3 (3) N/A 10.0
 
Jan. 15, 2019, 7 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 3.0 ppb (4) N/A N/A N/A N/A 10.0
 
Jan. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A 3.0 ppb (4) N/A N/A N/A N/A 4.0
 
Jan. 15, 2019, 4 p.m. 10.9 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A N/A 10.0
 
Jan. 15, 2019, 3 p.m. 12.2 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A 7.0 ppb (10) N/A N/A 10.0 μg/m3 (9) N/A 11.0
 
Jan. 15, 2019, 2 p.m. 11.1 ppb (10) 1.2 ppb (1) N/A 10.0 ppb (9) N/A 8.0 ppb (11) N/A N/A 11.0 μg/m3 (10) N/A 11.0
 
Jan. 15, 2019, 1 p.m. 10.2 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A 9.0 ppb (13) N/A N/A 12.0 μg/m3 (11) N/A 13.0
 
Jan. 15, 2019, noon 8.9 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A 6.0 ppb (9) N/A N/A 11.0 μg/m3 (10) N/A 10.0
 
Jan. 15, 2019, 11 a.m. 6.9 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A 7.0 ppb (10) N/A N/A 9.0 μg/m3 (8) N/A 10.0
 
Jan. 15, 2019, 10 a.m. 5.5 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 6.0 ppb (9) N/A N/A 8.0 μg/m3 (7) N/A 9.0
 
Jan. 15, 2019, 9 a.m. 6.4 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A 7.0 ppb (10) N/A N/A 8.0 μg/m3 (7) N/A 10.0
 
Jan. 15, 2019, 8 a.m. 7.5 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 10.0 ppb (14) N/A N/A 9.0 μg/m3 (8) N/A 14.0
 
Jan. 15, 2019, 7 a.m. 8.8 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 9.0 ppb (13) N/A N/A 12.0 μg/m3 (11) N/A 13.0
 
Jan. 15, 2019, 6 a.m. 8.5 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 12.0 ppb (17) N/A N/A 11.0 μg/m3 (10) N/A 17.0
 
Jan. 15, 2019, 5 a.m. 10.2 ppb (9) 0.4 ppb (0) N/A 10.0 ppb (9) N/A 12.0 ppb (17) N/A N/A 13.0 μg/m3 (12) N/A 17.0
 
Jan. 15, 2019, 4 a.m. 9.8 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A 12.0 ppb (17) N/A N/A 15.0 μg/m3 (14) N/A 17.0
 
Jan. 15, 2019, 3 a.m. 11.4 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A 10.0 ppb (14) N/A N/A 14.0 μg/m3 (13) N/A 14.0
 
Jan. 15, 2019, 2 a.m. 10.3 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A 9.0 ppb (13) N/A N/A 12.0 μg/m3 (11) N/A 13.0
 
Jan. 15, 2019, 1 a.m. 11.9 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A 4.0 ppb (6) N/A N/A 11.0 μg/m3 (10) N/A 11.0
 
Jan. 15, 2019, midnight 14.2 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A 4.0 ppb (6) N/A N/A 13.0 μg/m3 (12) N/A 13.0
 
Jan. 14, 2019, 11 p.m. 14.8 ppb (14) 0.9 ppb (1) N/A 14.0 ppb (13) N/A 5.0 ppb (7) N/A N/A 13.0 μg/m3 (12) N/A 14.0