AQSQID: 295100094

Site Name: Forest Park

Location: St. Louis (No. 2), MO

Reporting: True, Located: True

Current AQI: 6.0

St. Louis (No. 2) MO, US: 38.631057, -90.281144

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 23, 2019, 11 p.m. 6.7 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A N/A 6.0
 
Jan. 23, 2019, 10 p.m. 8.0 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A N/A 7.0
 
Jan. 23, 2019, 9 p.m. 8.9 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A N/A 8.0
 
Jan. 23, 2019, 8 p.m. 21.2 ppb (20) 11.3 ppb (10) N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) N/A N/A 20.0
 
Jan. 23, 2019, 7 p.m. 24.6 ppb (23) 14.1 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A N/A 23.0
 
Jan. 23, 2019, 6 p.m. 19.7 ppb (18) 12.0 ppb (11) N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) N/A N/A 18.0
 
Jan. 23, 2019, 5 p.m. 15.5 ppb (14) 8.6 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A N/A 14.0
 
Jan. 23, 2019, 4 p.m. 24.9 ppb (23) 14.5 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A N/A 23.0
 
Jan. 23, 2019, 3 p.m. 35.5 ppb (33) 24.1 ppb (22) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A N/A 33.0
 
Jan. 23, 2019, 2 p.m. 26.0 ppb (24) 15.4 ppb (14) N/A 11.0 ppb (10) N/A N/A N/A 0.25 ppb (3) N/A N/A 24.0
 
Jan. 23, 2019, 1 p.m. 27.8 ppb (26) 13.8 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) N/A N/A 26.0
 
Jan. 23, 2019, noon 16.8 ppb (16) 8.6 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A N/A 16.0
 
Jan. 23, 2019, 11 a.m. 17.4 ppb (16) 6.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A N/A 16.0
 
Jan. 23, 2019, 10 a.m. 23.3 ppb (22) 5.5 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A N/A 22.0
 
Jan. 23, 2019, 9 a.m. 17.0 ppb (16) 3.7 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A N/A 16.0
 
Jan. 23, 2019, 8 a.m. 19.7 ppb (18) 3.4 ppb (3) N/A 16.0 ppb (15) N/A N/A N/A 0.27 ppb (3) N/A N/A 18.0
 
Jan. 23, 2019, 7 a.m. 23.3 ppb (22) 4.1 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.27 ppb (3) N/A N/A 22.0
 
Jan. 23, 2019, 6 a.m. 29.6 ppb (27) 8.4 ppb (8) N/A 21.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A N/A 27.0
 
Jan. 23, 2019, 5 a.m. 23.9 ppb (22) 5.9 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A N/A 22.0
 
Jan. 23, 2019, 4 a.m. 26.2 ppb (24) 7.7 ppb (7) N/A 18.0 ppb (17) N/A N/A N/A 0.33 ppb (4) N/A N/A 24.0
 
Jan. 23, 2019, 3 a.m. 18.5 ppb (17) 6.1 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A N/A 17.0
 
Jan. 23, 2019, 2 a.m. 16.2 ppb (15) 5.7 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A N/A 15.0
 
Jan. 23, 2019, 1 a.m. 16.7 ppb (15) 5.5 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A N/A 15.0
 
Jan. 23, 2019, midnight 17.0 ppb (16) 5.5 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A N/A 16.0
 
Jan. 22, 2019, 11 p.m. 15.6 ppb (14) 4.8 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.29 ppb (3) N/A N/A 14.0
 
Jan. 22, 2019, 10 p.m. 18.8 ppb (17) 6.4 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.32 ppb (4) N/A N/A 17.0
 
Jan. 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A 0.37 ppb (4) N/A N/A 4.0
 
Jan. 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A 0.36 ppb (4) N/A N/A 4.0
 
Jan. 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 22, 2019, 5 p.m. 26.9 ppb (25) 13.6 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A N/A 25.0
 
Jan. 22, 2019, 4 p.m. 24.9 ppb (23) 12.5 ppb (12) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A N/A 23.0
 
Jan. 22, 2019, 3 p.m. 38.5 ppb (36) 19.0 ppb (18) N/A 20.0 ppb (19) N/A N/A N/A 0.41 ppb (5) N/A N/A 36.0
 
Jan. 22, 2019, 2 p.m. 55.2 ppb (51) 26.7 ppb (25) N/A 29.0 ppb (27) N/A N/A N/A 0.45 ppb (5) N/A N/A 51.0
 
Jan. 22, 2019, 1 p.m. 43.4 ppb (40) 20.3 ppb (19) N/A 23.0 ppb (21) N/A N/A N/A 0.41 ppb (5) N/A N/A 40.0
 
Jan. 22, 2019, noon 37.1 ppb (34) 16.7 ppb (15) N/A 20.0 ppb (19) N/A N/A N/A 0.37 ppb (4) N/A N/A 34.0
 
Jan. 22, 2019, 11 a.m. 21.1 ppb (20) 8.7 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A N/A 20.0
 
Jan. 22, 2019, 10 a.m. 17.0 ppb (16) 6.7 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A N/A 16.0
 
Jan. 22, 2019, 9 a.m. 15.6 ppb (14) 5.4 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.21 ppb (2) N/A N/A 14.0
 
Jan. 22, 2019, 8 a.m. 13.4 ppb (12) 4.2 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A N/A 12.0
 
Jan. 22, 2019, 7 a.m. 10.9 ppb (10) 3.1 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.17 ppb (2) N/A N/A 10.0
 
Jan. 22, 2019, 6 a.m. 14.4 ppb (13) 4.9 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.19 ppb (2) N/A N/A 13.0
 
Jan. 22, 2019, 5 a.m. 12.9 ppb (12) 3.9 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A N/A 12.0
 
Jan. 22, 2019, 4 a.m. 15.0 ppb (14) 5.3 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) N/A N/A 14.0
 
Jan. 22, 2019, 3 a.m. 14.8 ppb (14) 5.9 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A N/A 14.0
 
Jan. 22, 2019, 2 a.m. 15.1 ppb (14) 5.5 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.21 ppb (2) N/A N/A 14.0
 
Jan. 22, 2019, 1 a.m. 16.1 ppb (15) 6.1 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A N/A 15.0
 
Jan. 22, 2019, midnight 18.4 ppb (17) 7.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A N/A 17.0
 
Jan. 21, 2019, 11 p.m. 20.7 ppb (19) 8.1 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.28 ppb (3) N/A N/A 19.0
 
Jan. 21, 2019, 10 p.m. 19.4 ppb (18) 8.0 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A N/A 18.0
 
Jan. 21, 2019, 9 p.m. 22.0 ppb (20) 10.2 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A N/A 20.0
 
Jan. 21, 2019, 8 p.m. 21.3 ppb (20) 11.0 ppb (10) N/A 10.0 ppb (9) N/A N/A N/A 0.28 ppb (3) N/A N/A 20.0
 
Jan. 21, 2019, 7 p.m. 21.2 ppb (20) 11.7 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A 0.26 ppb (3) N/A N/A 20.0
 
Jan. 21, 2019, 6 p.m. 22.6 ppb (21) 12.1 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.25 ppb (3) N/A N/A 21.0
 
Jan. 21, 2019, 5 p.m. 23.5 ppb (22) 14.2 ppb (13) N/A 9.0 ppb (8) N/A N/A N/A 0.26 ppb (3) N/A N/A 22.0
 
Jan. 21, 2019, 4 p.m. 23.2 ppb (21) 13.7 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A 0.27 ppb (3) N/A N/A 21.0
 
Jan. 21, 2019, 3 p.m. 28.8 ppb (27) 16.8 ppb (16) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A N/A 27.0
 
Jan. 21, 2019, 2 p.m. 36.4 ppb (34) 18.5 ppb (17) N/A 18.0 ppb (17) N/A N/A N/A 0.33 ppb (4) N/A N/A 34.0
 
Jan. 21, 2019, 1 p.m. 37.5 ppb (35) 15.9 ppb (15) N/A 22.0 ppb (20) N/A N/A N/A 0.31 ppb (3) N/A N/A 35.0
 
Jan. 21, 2019, noon 22.6 ppb (21) 6.0 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.23 ppb (3) N/A N/A 21.0
 
Jan. 21, 2019, 11 a.m. 21.3 ppb (20) 6.9 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.19 ppb (2) N/A N/A 20.0
 
Jan. 21, 2019, 10 a.m. 18.2 ppb (17) 4.1 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A N/A 17.0
 
Jan. 21, 2019, 9 a.m. 15.1 ppb (14) 5.1 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A N/A 14.0
 
Jan. 21, 2019, 8 a.m. 19.1 ppb (18) 5.3 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.35 ppb (4) N/A N/A 18.0
 
Jan. 21, 2019, 7 a.m. 23.0 ppb (21) 6.6 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.35 ppb (4) N/A N/A 21.0
 
Jan. 21, 2019, 6 a.m. 15.0 ppb (14) 3.9 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.19 ppb (2) N/A N/A 14.0
 
Jan. 21, 2019, 5 a.m. 9.3 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A N/A 9.0
 
Jan. 21, 2019, 4 a.m. 8.0 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A N/A 7.0
 
Jan. 21, 2019, 3 a.m. 6.9 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) N/A N/A 6.0
 
Jan. 21, 2019, 2 a.m. 7.2 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A N/A 7.0
 
Jan. 21, 2019, 1 a.m. 6.8 ppb (6) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A N/A 6.0
 
Jan. 21, 2019, midnight 8.6 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A N/A 8.0
 
Jan. 20, 2019, 11 p.m. 9.4 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A N/A 9.0
 
Jan. 20, 2019, 10 p.m. 8.9 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A N/A 8.0
 
Jan. 20, 2019, 9 p.m. 5.1 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A N/A 5.0
 
Jan. 20, 2019, 8 p.m. 3.9 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) N/A N/A 4.0
 
Jan. 20, 2019, 7 p.m. 4.3 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A N/A 4.0
 
Jan. 20, 2019, 6 p.m. 6.5 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A N/A 6.0
 
Jan. 20, 2019, 5 p.m. 7.4 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A N/A 7.0
 
Jan. 20, 2019, 4 p.m. 7.1 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A N/A 7.0
 
Jan. 20, 2019, 3 p.m. 6.2 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A N/A 6.0
 
Jan. 20, 2019, 2 p.m. 6.0 ppb (6) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A N/A 6.0
 
Jan. 20, 2019, 1 p.m. 5.9 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A N/A 5.0
 
Jan. 20, 2019, noon 6.0 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A N/A 6.0
 
Jan. 20, 2019, 11 a.m. 6.4 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A N/A 6.0
 
Jan. 20, 2019, 10 a.m. 4.0 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A N/A 4.0
 
Jan. 20, 2019, 9 a.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A N/A 3.0
 
Jan. 20, 2019, 8 a.m. 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A N/A 3.0
 
Jan. 20, 2019, 7 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) N/A N/A 3.0
 
Jan. 20, 2019, 6 a.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A N/A 3.0
 
Jan. 20, 2019, 5 a.m. 2.3 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A N/A 2.0
 
Jan. 20, 2019, 4 a.m. 2.3 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A N/A 2.0
 
Jan. 20, 2019, 3 a.m. 2.7 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A N/A 3.0
 
Jan. 20, 2019, 2 a.m. 3.3 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A N/A 3.0
 
Jan. 20, 2019, 1 a.m. 2.4 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A N/A 2.0
 
Jan. 20, 2019, midnight 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A N/A 3.0
 
Jan. 19, 2019, 11 p.m. 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A N/A 3.0
 
Jan. 19, 2019, 10 p.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A N/A 4.0
 
Jan. 19, 2019, 9 p.m. 4.3 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A N/A 4.0
 
Jan. 19, 2019, 8 p.m. 5.4 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A N/A 5.0
 
Jan. 19, 2019, 7 p.m. 7.3 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A N/A 7.0
 
Jan. 19, 2019, 6 p.m. 7.9 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A N/A 7.0
 
Jan. 19, 2019, 5 p.m. 8.0 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A N/A 7.0
 
Jan. 19, 2019, 4 p.m. 6.8 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) N/A N/A 6.0
 
Jan. 19, 2019, 3 p.m. 7.2 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) N/A N/A 7.0
 
Jan. 19, 2019, 2 p.m. 9.8 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A N/A 9.0
 
Jan. 19, 2019, 1 p.m. 7.0 ppb (6) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A N/A 6.0
 
Jan. 19, 2019, noon 6.3 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A N/A 6.0
 
Jan. 19, 2019, 11 a.m. 6.5 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A N/A 6.0
 
Jan. 19, 2019, 10 a.m. 6.7 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A N/A 6.0
 
Jan. 19, 2019, 9 a.m. 8.9 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A N/A 8.0
 
Jan. 19, 2019, 8 a.m. 13.2 ppb (12) 2.2 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A N/A 12.0
 
Jan. 19, 2019, 7 a.m. 16.1 ppb (15) 4.5 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A N/A 15.0
 
Jan. 19, 2019, 6 a.m. 20.0 ppb (19) 5.5 ppb (5) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A N/A 19.0
 
Jan. 19, 2019, 5 a.m. 17.5 ppb (16) 4.8 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A N/A 16.0
 
Jan. 19, 2019, 4 a.m. 16.5 ppb (15) 4.5 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A N/A 15.0
 
Jan. 19, 2019, 3 a.m. 17.4 ppb (16) 7.5 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A N/A 16.0
 
Jan. 19, 2019, 2 a.m. 16.8 ppb (16) 7.3 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A N/A 16.0
 
Jan. 19, 2019, 1 a.m. 19.2 ppb (18) 7.8 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A N/A 18.0
 
Jan. 19, 2019, midnight 20.3 ppb (19) 8.1 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A N/A 19.0
 
Jan. 18, 2019, 11 p.m. 18.8 ppb (17) 7.8 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A N/A 17.0
 
Jan. 18, 2019, 10 p.m. 18.1 ppb (17) 7.6 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A N/A 17.0
 
Jan. 18, 2019, 9 p.m. 23.7 ppb (22) 10.8 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.29 ppb (3) N/A N/A 22.0
 
Jan. 18, 2019, 8 p.m. 28.9 ppb (27) 14.2 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.33 ppb (4) N/A N/A 27.0
 
Jan. 18, 2019, 7 p.m. 30.9 ppb (29) 15.7 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A N/A 29.0
 
Jan. 18, 2019, 6 p.m. 33.7 ppb (31) 18.3 ppb (17) N/A 16.0 ppb (15) N/A N/A N/A 0.37 ppb (4) N/A N/A 31.0
 
Jan. 18, 2019, 5 p.m. 38.8 ppb (36) 21.6 ppb (20) N/A 17.0 ppb (16) N/A N/A N/A 0.41 ppb (5) N/A N/A 36.0
 
Jan. 18, 2019, 4 p.m. 36.9 ppb (34) 20.5 ppb (19) N/A 17.0 ppb (16) N/A N/A N/A 0.39 ppb (4) N/A N/A 34.0
 
Jan. 18, 2019, 3 p.m. 43.0 ppb (40) 22.9 ppb (21) N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A N/A 40.0
 
Jan. 18, 2019, 2 p.m. 35.8 ppb (33) 16.0 ppb (15) N/A 20.0 ppb (19) N/A N/A N/A 0.39 ppb (4) N/A N/A 33.0
 
Jan. 18, 2019, 1 p.m. 45.1 ppb (42) 22.1 ppb (20) N/A 23.0 ppb (21) N/A N/A N/A 0.43 ppb (5) N/A N/A 42.0
 
Jan. 18, 2019, noon 38.4 ppb (36) 17.5 ppb (16) N/A 21.0 ppb (19) N/A N/A N/A 0.38 ppb (4) N/A N/A 36.0
 
Jan. 18, 2019, 11 a.m. 7.1 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A N/A 7.0
 
Jan. 18, 2019, 10 a.m. 8.1 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A N/A 8.0
 
Jan. 18, 2019, 9 a.m. 8.0 ppb (7) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A N/A 7.0
 
Jan. 18, 2019, 8 a.m. 6.1 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A N/A 6.0
 
Jan. 18, 2019, 7 a.m. 7.8 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A N/A 7.0
 
Jan. 18, 2019, 6 a.m. 8.3 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A N/A 8.0
 
Jan. 18, 2019, 5 a.m. 8.5 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A N/A 8.0
 
Jan. 18, 2019, 4 a.m. 9.5 ppb (9) 1.4 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.26 ppb (3) N/A N/A 9.0
 
Jan. 18, 2019, 3 a.m. 9.8 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.29 ppb (3) N/A N/A 9.0
 
Jan. 18, 2019, 2 a.m. 10.0 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.27 ppb (3) N/A N/A 9.0
 
Jan. 18, 2019, 1 a.m. 10.5 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A N/A 10.0
 
Jan. 18, 2019, midnight 13.3 ppb (12) 1.5 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.32 ppb (4) N/A N/A 12.0
 
Jan. 17, 2019, 11 p.m. 17.4 ppb (16) 2.6 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.39 ppb (4) N/A N/A 16.0
 
Jan. 17, 2019, 10 p.m. 18.3 ppb (17) 4.8 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A N/A 17.0
 
Jan. 17, 2019, 9 p.m. 15.4 ppb (14) 4.8 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.32 ppb (4) N/A N/A 14.0
 
Jan. 17, 2019, 8 p.m. 57.1 ppb (53) 38.4 ppb (36) N/A 19.0 ppb (18) N/A N/A N/A 0.36 ppb (4) N/A N/A 53.0
 
Jan. 17, 2019, 7 p.m. 38.2 ppb (35) 23.0 ppb (21) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A N/A 35.0
 
Jan. 17, 2019, 6 p.m. 42.4 ppb (39) 26.3 ppb (24) N/A 16.0 ppb (15) N/A N/A N/A 0.47 ppb (5) N/A N/A 39.0
 
Jan. 17, 2019, 5 p.m. 83.4 ppb (81) 61.1 ppb (58) N/A 23.0 ppb (21) N/A N/A N/A 0.64 ppb (7) N/A N/A 81.0
 
Jan. 17, 2019, 4 p.m. 83.4 ppb (81) 58.5 ppb (55) N/A 25.0 ppb (23) N/A N/A N/A 0.82 ppb (9) N/A N/A 81.0
 
Jan. 17, 2019, 3 p.m. 75.5 ppb (73) 51.3 ppb (48) N/A 24.0 ppb (22) N/A N/A N/A 0.65 ppb (7) N/A N/A 73.0
 
Jan. 17, 2019, 2 p.m. 76.2 ppb (74) 55.3 ppb (51) N/A 21.0 ppb (19) N/A N/A N/A 0.54 ppb (6) N/A N/A 74.0
 
Jan. 17, 2019, 1 p.m. 110.2 ppb (102) 85.5 ppb (84) N/A 25.0 ppb (23) N/A N/A N/A 0.59 ppb (7) N/A N/A 102.0
 
Jan. 17, 2019, noon 52.6 ppb (49) 31.1 ppb (29) N/A 22.0 ppb (20) N/A N/A N/A 0.44 ppb (5) N/A N/A 49.0
 
Jan. 17, 2019, 11 a.m. 47.8 ppb (44) 26.1 ppb (24) N/A 22.0 ppb (20) N/A N/A N/A 0.33 ppb (4) N/A N/A 44.0
 
Jan. 17, 2019, 10 a.m. 36.6 ppb (34) 16.1 ppb (15) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A N/A 34.0
 
Jan. 17, 2019, 9 a.m. 27.6 ppb (26) 9.2 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.24 ppb (3) N/A N/A 26.0
 
Jan. 17, 2019, 8 a.m. 29.0 ppb (27) 10.3 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.28 ppb (3) N/A N/A 27.0
 
Jan. 17, 2019, 7 a.m. 42.9 ppb (40) 19.4 ppb (18) N/A 23.0 ppb (21) N/A N/A N/A 0.29 ppb (3) N/A N/A 40.0
 
Jan. 17, 2019, 6 a.m. 28.0 ppb (26) 8.0 ppb (7) N/A 20.0 ppb (19) N/A N/A N/A 0.27 ppb (3) N/A N/A 26.0
 
Jan. 17, 2019, 5 a.m. 32.4 ppb (30) 10.3 ppb (10) N/A 22.0 ppb (20) N/A N/A N/A 0.3 ppb (3) N/A N/A 30.0
 
Jan. 17, 2019, 4 a.m. 37.7 ppb (35) 12.8 ppb (12) N/A 25.0 ppb (23) N/A N/A N/A 0.34 ppb (4) N/A N/A 35.0
 
Jan. 17, 2019, 3 a.m. 31.0 ppb (29) 8.2 ppb (8) N/A 23.0 ppb (21) N/A N/A N/A 0.32 ppb (4) N/A N/A 29.0
 
Jan. 17, 2019, 2 a.m. 38.4 ppb (36) 15.2 ppb (14) N/A 23.0 ppb (21) N/A N/A N/A 0.37 ppb (4) N/A N/A 36.0
 
Jan. 17, 2019, 1 a.m. 41.0 ppb (38) 14.9 ppb (14) N/A 26.0 ppb (24) N/A N/A N/A 0.38 ppb (4) N/A N/A 38.0
 
Jan. 17, 2019, midnight 35.5 ppb (33) 9.2 ppb (9) N/A 26.0 ppb (24) N/A N/A N/A 0.28 ppb (3) N/A N/A 33.0