AQSQID: 295100086

Site Name: Mrgretta

Location: St. Louis (Margaretta Ave), MO

Reporting: False, Located: True

Current AQI: None

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
Feb. 27, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) N/A 9.0
 
Feb. 27, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) N/A 10.0
 
Feb. 27, 2019, 4 p.m. 10.5 ppb (10) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A N/A 12.0 μg/m3 (11) N/A 11.0
 
Feb. 27, 2019, 3 p.m. 12.7 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 12.0
 
Feb. 27, 2019, 2 p.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 13.0
 
Feb. 27, 2019, 1 p.m. 20.6 ppb (19) 3.6 ppb (3) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A N/A 17.0 μg/m3 (15) N/A 19.0
 
Feb. 27, 2019, noon 22.5 ppb (21) 2.1 ppb (2) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A N/A 16.0 μg/m3 (15) N/A 21.0
 
Feb. 27, 2019, 11 a.m. 23.2 ppb (21) 0.9 ppb (1) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 21.0
 
Feb. 27, 2019, 10 a.m. 18.6 ppb (17) 0.7 ppb (1) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 17.0
 
Feb. 27, 2019, 9 a.m. 16.5 ppb (15) 0.6 ppb (1) N/A 16.0 ppb (15) N/A 3.0 ppb (4) N/A N/A 10.0 μg/m3 (9) N/A 15.0
 
Feb. 27, 2019, 8 a.m. 17.0 ppb (16) 0.7 ppb (1) N/A 16.0 ppb (15) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 16.0
 
Feb. 27, 2019, 7 a.m. 10.5 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) N/A 10.0
 
Feb. 27, 2019, 6 a.m. 14.1 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A 2.0 ppb (3) N/A N/A 13.0 μg/m3 (12) N/A 13.0
 
Feb. 27, 2019, 5 a.m. 18.5 ppb (17) 1.0 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 17.0
 
Feb. 27, 2019, 4 a.m. 28.1 ppb (26) 3.1 ppb (3) N/A 25.0 ppb (23) N/A 2.0 ppb (3) N/A N/A 16.0 μg/m3 (15) N/A 26.0
 
Feb. 27, 2019, 3 a.m. 35.5 ppb (33) 5.0 ppb (5) N/A 30.0 ppb (28) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) N/A 33.0
 
Feb. 27, 2019, 2 a.m. 35.3 ppb (33) 4.1 ppb (4) N/A 31.0 ppb (29) N/A 2.0 ppb (3) N/A N/A 24.0 μg/m3 (22) N/A 33.0
 
Feb. 27, 2019, 1 a.m. 31.0 ppb (29) 3.7 ppb (3) N/A 27.0 ppb (25) N/A 2.0 ppb (3) N/A N/A 25.0 μg/m3 (23) N/A 29.0
 
Feb. 27, 2019, midnight 31.1 ppb (29) 3.6 ppb (3) N/A 27.0 ppb (25) N/A 2.0 ppb (3) N/A N/A 22.0 μg/m3 (20) N/A 29.0
 
Feb. 26, 2019, 11 p.m. 16.5 ppb (15) 1.7 ppb (2) N/A 15.0 ppb (14) N/A 3.0 ppb (4) N/A N/A 17.0 μg/m3 (15) N/A 15.0
 
Feb. 26, 2019, 10 p.m. 10.6 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A 3.0 ppb (4) N/A N/A 16.0 μg/m3 (15) N/A 15.0
 
Feb. 26, 2019, 9 p.m. 12.4 ppb (11) 2.8 ppb (3) N/A 10.0 ppb (9) N/A 4.0 ppb (6) N/A N/A 18.0 μg/m3 (16) N/A 16.0
 
Feb. 26, 2019, 8 p.m. 13.3 ppb (12) 3.7 ppb (3) N/A 10.0 ppb (9) N/A 4.0 ppb (6) N/A N/A 27.0 μg/m3 (25) N/A 25.0
 
Feb. 26, 2019, 7 p.m. 15.6 ppb (14) 5.3 ppb (5) N/A 10.0 ppb (9) N/A 3.0 ppb (4) N/A N/A 28.0 μg/m3 (25) N/A 25.0
 
Feb. 26, 2019, 6 p.m. 16.9 ppb (16) 6.3 ppb (6) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 29.0 μg/m3 (26) N/A 26.0
 
Feb. 26, 2019, 5 p.m. 19.8 ppb (18) 8.4 ppb (8) N/A 11.0 ppb (10) N/A 5.0 ppb (7) N/A N/A 28.0 μg/m3 (25) N/A 25.0
 
Feb. 26, 2019, 4 p.m. 20.2 ppb (19) 8.2 ppb (8) N/A 12.0 ppb (11) N/A 5.0 ppb (7) N/A N/A 20.0 μg/m3 (18) N/A 19.0
 
Feb. 26, 2019, 3 p.m. 15.5 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) N/A 14.0
 
Feb. 26, 2019, 2 p.m. 20.5 ppb (19) 8.5 ppb (8) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 19.0
 
Feb. 26, 2019, 1 p.m. 31.1 ppb (29) 11.6 ppb (11) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 16.0 μg/m3 (15) N/A 29.0
 
Feb. 26, 2019, noon 45.3 ppb (42) 18.4 ppb (17) N/A 27.0 ppb (25) N/A 1.0 ppb (1) N/A N/A 21.0 μg/m3 (19) N/A 42.0
 
Feb. 26, 2019, 11 a.m. 52.6 ppb (49) 20.1 ppb (19) N/A 33.0 ppb (31) N/A 1.0 ppb (1) N/A N/A 15.0 μg/m3 (14) N/A 49.0
 
Feb. 26, 2019, 10 a.m. 47.3 ppb (44) 13.9 ppb (13) N/A 34.0 ppb (31) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 44.0
 
Feb. 26, 2019, 9 a.m. 39.3 ppb (36) 9.5 ppb (9) N/A 30.0 ppb (28) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 36.0
 
Feb. 26, 2019, 8 a.m. 44.1 ppb (41) 13.6 ppb (13) N/A 31.0 ppb (29) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 41.0
 
Feb. 26, 2019, 7 a.m. 84.0 ppb (82) 46.6 ppb (43) N/A 38.0 ppb (35) N/A 1.0 ppb (1) N/A N/A 23.0 μg/m3 (21) N/A 82.0
 
Feb. 26, 2019, 6 a.m. 95.2 ppb (94) 55.0 ppb (51) N/A 41.0 ppb (38) N/A 1.0 ppb (1) N/A N/A 25.0 μg/m3 (23) N/A 94.0
 
Feb. 26, 2019, 5 a.m. 81.9 ppb (80) 41.0 ppb (38) N/A 41.0 ppb (38) N/A 1.0 ppb (1) N/A N/A 24.0 μg/m3 (22) N/A 80.0
 
Feb. 26, 2019, 4 a.m. 42.4 ppb (39) 7.1 ppb (7) N/A 35.0 ppb (32) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) N/A 39.0
 
Feb. 26, 2019, 3 a.m. 30.3 ppb (28) 1.9 ppb (2) N/A 28.0 ppb (26) N/A 1.0 ppb (1) N/A N/A 19.0 μg/m3 (17) N/A 28.0
 
Feb. 26, 2019, 2 a.m. 21.7 ppb (20) 2.0 ppb (2) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 20.0
 
Feb. 26, 2019, 1 a.m. 23.9 ppb (22) 1.7 ppb (2) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A N/A 20.0 μg/m3 (18) N/A 22.0
 
Feb. 26, 2019, midnight 26.7 ppb (25) 2.8 ppb (3) N/A 24.0 ppb (22) N/A 2.0 ppb (3) N/A N/A 22.0 μg/m3 (20) N/A 25.0
 
Feb. 25, 2019, 11 p.m. 11.2 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 10.0
 
Feb. 25, 2019, 10 p.m. 8.9 ppb (8) 1.4 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
 
Feb. 25, 2019, 9 p.m. 8.9 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 10.0 μg/m3 (9) N/A 9.0
 
Feb. 25, 2019, 8 p.m. 11.0 ppb (10) 3.1 ppb (3) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 10.0
 
Feb. 25, 2019, 7 p.m. 12.5 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 12.0
 
Feb. 25, 2019, 6 p.m. 14.6 ppb (14) 4.9 ppb (5) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) N/A 14.0
 
Feb. 25, 2019, 5 p.m. 17.8 ppb (16) 6.3 ppb (6) N/A 11.0 ppb (10) N/A 3.0 ppb (4) N/A N/A 20.0 μg/m3 (18) N/A 18.0
 
Feb. 25, 2019, 4 p.m. 19.6 ppb (18) 7.4 ppb (7) N/A 12.0 ppb (11) N/A 4.0 ppb (6) N/A N/A 24.0 μg/m3 (22) N/A 22.0
 
Feb. 25, 2019, 3 p.m. 16.4 ppb (15) 6.1 ppb (6) N/A 10.0 ppb (9) N/A 2.0 ppb (3) N/A N/A 13.0 μg/m3 (12) N/A 15.0
 
Feb. 25, 2019, 2 p.m. 13.8 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 13.0
 
Feb. 25, 2019, 1 p.m. 16.6 ppb (15) 2.7 ppb (3) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 15.0
 
Feb. 25, 2019, noon 15.1 ppb (14) 0.8 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 14.0
 
Feb. 25, 2019, 11 a.m. 14.8 ppb (14) 0.7 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 14.0
 
Feb. 25, 2019, 10 a.m. 9.5 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 9.0
 
Feb. 25, 2019, 9 a.m. 7.6 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 25, 2019, 8 a.m. 5.5 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 25, 2019, 7 a.m. 5.3 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Feb. 25, 2019, 6 a.m. 6.5 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 25, 2019, 5 a.m. 5.3 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 25, 2019, 4 a.m. 5.0 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 25, 2019, 3 a.m. 5.1 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 25, 2019, 2 a.m. 5.7 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 25, 2019, 1 a.m. 5.5 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 25, 2019, midnight 6.1 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 24, 2019, 11 p.m. 4.0 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Feb. 24, 2019, 10 p.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
Feb. 24, 2019, 9 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
Feb. 24, 2019, 8 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Feb. 24, 2019, 7 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
Feb. 24, 2019, 6 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Feb. 24, 2019, 5 p.m. 3.6 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Feb. 24, 2019, 4 p.m. 3.7 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
Feb. 24, 2019, 3 p.m. 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 24, 2019, 2 p.m. 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 24, 2019, 1 p.m. 4.0 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 9.0
 
Feb. 24, 2019, noon 3.8 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 11.0 μg/m3 (10) N/A 10.0
 
Feb. 24, 2019, 11 a.m. 4.0 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (9) N/A 9.0
 
Feb. 24, 2019, 10 a.m. 3.9 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 9.0
 
Feb. 24, 2019, 9 a.m. 4.0 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 24, 2019, 8 a.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 24, 2019, 7 a.m. 4.1 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 7.0
 
Feb. 24, 2019, 6 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) N/A 16.0
 
Feb. 24, 2019, 5 a.m. 4.7 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 17.0 μg/m3 (15) N/A 15.0
 
Feb. 24, 2019, 4 a.m. 8.2 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) N/A 8.0
 
Feb. 24, 2019, 3 a.m. 8.0 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 3.0 μg/m3 (3) N/A 7.0
 
Feb. 24, 2019, 2 a.m. 10.6 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) N/A 10.0
 
Feb. 24, 2019, 1 a.m. 11.9 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) N/A 11.0
 
Feb. 24, 2019, midnight 12.7 ppb (12) 1.1 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) N/A 12.0
 
Feb. 23, 2019, 11 p.m. 16.2 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 15.0
 
Feb. 23, 2019, 10 p.m. 14.3 ppb (13) 2.6 ppb (2) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 13.0
 
Feb. 23, 2019, 9 p.m. 14.1 ppb (13) 2.6 ppb (2) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) N/A 13.0
 
Feb. 23, 2019, 8 p.m. 11.5 ppb (11) 2.6 ppb (2) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) N/A 11.0
 
Feb. 23, 2019, 7 p.m. 10.7 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) N/A 10.0
 
Feb. 23, 2019, 6 p.m. 13.2 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 3.0 μg/m3 (3) N/A 12.0
 
Feb. 23, 2019, 5 p.m. 16.0 ppb (15) 3.3 ppb (3) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 15.0
 
Feb. 23, 2019, 4 p.m. 12.9 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 12.0
 
Feb. 23, 2019, 3 p.m. 13.2 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 12.0
 
Feb. 23, 2019, 2 p.m. 15.6 ppb (14) 2.9 ppb (3) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 14.0
 
Feb. 23, 2019, 1 p.m. 14.9 ppb (14) 1.7 ppb (2) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 14.0
 
Feb. 23, 2019, noon 13.3 ppb (12) 1.3 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) N/A 12.0
 
Feb. 23, 2019, 11 a.m. 13.0 ppb (12) 1.2 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 12.0
 
Feb. 23, 2019, 10 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 11.0
 
Feb. 23, 2019, 9 a.m. 15.9 ppb (15) 1.1 ppb (1) N/A 15.0 ppb (14) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 15.0
 
Feb. 23, 2019, 8 a.m. 12.6 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 12.0
 
Feb. 23, 2019, 7 a.m. 12.1 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
 
Feb. 23, 2019, 6 a.m. 13.7 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 15.0 μg/m3 (14) N/A 14.0
 
Feb. 23, 2019, 5 a.m. 13.3 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 12.0
 
Feb. 23, 2019, 4 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 14.0
 
Feb. 23, 2019, 3 a.m. 19.0 ppb (18) 1.3 ppb (1) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 18.0
 
Feb. 23, 2019, 2 a.m. 18.2 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 17.0
 
Feb. 23, 2019, 1 a.m. 15.4 ppb (14) 1.2 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 14.0
 
Feb. 23, 2019, midnight 15.6 ppb (14) 1.7 ppb (2) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 14.0
 
Feb. 22, 2019, 11 p.m. 14.6 ppb (14) 1.1 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 16.0 μg/m3 (15) N/A 15.0
 
Feb. 22, 2019, 10 p.m. 13.8 ppb (13) 1.3 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 16.0 μg/m3 (15) N/A 15.0
 
Feb. 22, 2019, 9 p.m. 13.2 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 17.0 μg/m3 (15) N/A 15.0
 
Feb. 22, 2019, 8 p.m. 12.8 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) N/A 16.0
 
Feb. 22, 2019, 7 p.m. 14.8 ppb (14) 3.4 ppb (3) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 16.0 μg/m3 (15) N/A 15.0
 
Feb. 22, 2019, 6 p.m. 14.0 ppb (13) 2.9 ppb (3) N/A 11.0 ppb (10) N/A 5.0 ppb (7) N/A N/A 19.0 μg/m3 (17) N/A 17.0
 
Feb. 22, 2019, 5 p.m. 16.8 ppb (16) 4.5 ppb (4) N/A 12.0 ppb (11) N/A 2.0 ppb (3) N/A N/A 18.0 μg/m3 (16) N/A 16.0
 
Feb. 22, 2019, 4 p.m. 13.2 ppb (12) 2.6 ppb (2) N/A 10.0 ppb (9) N/A 5.0 ppb (7) N/A N/A 20.0 μg/m3 (18) N/A 18.0
 
Feb. 22, 2019, 3 p.m. 18.2 ppb (17) 5.9 ppb (5) N/A 12.0 ppb (11) N/A 4.0 ppb (6) N/A N/A 22.0 μg/m3 (20) N/A 20.0
 
Feb. 22, 2019, 2 p.m. 20.2 ppb (19) 4.6 ppb (4) N/A 16.0 ppb (15) N/A 2.0 ppb (3) N/A N/A 22.0 μg/m3 (20) N/A 20.0
 
Feb. 22, 2019, 1 p.m. 30.4 ppb (28) 7.7 ppb (7) N/A 23.0 ppb (21) N/A 1.0 ppb (1) N/A N/A 17.0 μg/m3 (15) N/A 28.0
 
Feb. 22, 2019, noon 25.9 ppb (24) 5.9 ppb (5) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 24.0
 
Feb. 22, 2019, 11 a.m. 17.3 ppb (16) 2.2 ppb (2) N/A 15.0 ppb (14) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 16.0
 
Feb. 22, 2019, 10 a.m. 16.4 ppb (15) 1.3 ppb (1) N/A 15.0 ppb (14) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 15.0
 
Feb. 22, 2019, 9 a.m. 15.2 ppb (14) 2.1 ppb (2) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 14.0
 
Feb. 22, 2019, 8 a.m. 14.2 ppb (13) 1.2 ppb (1) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 13.0
 
Feb. 22, 2019, 7 a.m. 22.0 ppb (20) 2.5 ppb (2) N/A 19.0 ppb (18) N/A 1.0 ppb (1) N/A N/A 16.0 μg/m3 (15) N/A 20.0
 
Feb. 22, 2019, 6 a.m. 24.6 ppb (23) 2.6 ppb (2) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) N/A 23.0
 
Feb. 22, 2019, 5 a.m. 21.3 ppb (20) 1.2 ppb (1) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A 18.0 μg/m3 (16) N/A 20.0
 
Feb. 22, 2019, 4 a.m. 18.5 ppb (17) 1.8 ppb (2) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A N/A 16.0 μg/m3 (15) N/A 17.0
 
Feb. 22, 2019, 3 a.m. 17.9 ppb (17) 1.6 ppb (1) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A N/A 21.0 μg/m3 (19) N/A 19.0
 
Feb. 22, 2019, 2 a.m. 15.9 ppb (15) 1.8 ppb (2) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 17.0 μg/m3 (15) N/A 15.0
 
Feb. 22, 2019, 1 a.m. 17.1 ppb (16) 1.7 ppb (2) N/A 15.0 ppb (14) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) N/A 16.0
 
Feb. 22, 2019, midnight 21.1 ppb (20) 3.6 ppb (3) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A N/A 20.0 μg/m3 (18) N/A 20.0
 
Feb. 21, 2019, 11 p.m. 15.7 ppb (15) 1.6 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 19.0 μg/m3 (17) N/A 17.0
 
Feb. 21, 2019, 10 p.m. 18.7 ppb (17) 3.9 ppb (4) N/A 15.0 ppb (14) N/A 1.0 ppb (1) N/A N/A 21.0 μg/m3 (19) N/A 19.0
 
Feb. 21, 2019, 9 p.m. 12.9 ppb (12) 1.8 ppb (2) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 19.0 μg/m3 (17) N/A 17.0
 
Feb. 21, 2019, 8 p.m. 13.8 ppb (13) 2.5 ppb (2) N/A 11.0 ppb (10) N/A 2.0 ppb (3) N/A N/A 15.0 μg/m3 (14) N/A 14.0
 
Feb. 21, 2019, 7 p.m. 12.7 ppb (12) 2.7 ppb (3) 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
 
Feb. 21, 2019, 6 p.m. 9.1 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 9.0
 
Feb. 21, 2019, 5 p.m. 8.0 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 21, 2019, 4 p.m. 8.4 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) N/A 8.0
 
Feb. 21, 2019, 3 p.m. 16.3 ppb (15) 4.7 ppb (4) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (12) N/A 15.0
 
Feb. 21, 2019, 2 p.m. 27.7 ppb (26) 8.2 ppb (8) N/A 19.0 ppb (18) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 26.0
 
Feb. 21, 2019, 1 p.m. 61.3 ppb (58) 28.6 ppb (26) N/A 33.0 ppb (31) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) N/A 58.0
 
Feb. 21, 2019, noon 47.1 ppb (44) 14.3 ppb (13) N/A 33.0 ppb (31) N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) N/A 44.0
 
Feb. 21, 2019, 11 a.m. 30.9 ppb (29) 4.9 ppb (5) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 29.0
 
Feb. 21, 2019, 10 a.m. 14.9 ppb (14) 0.8 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 14.0
 
Feb. 21, 2019, 9 a.m. 11.1 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 10.0
 
Feb. 21, 2019, 8 a.m. 8.7 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 21, 2019, 7 a.m. 7.4 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
Feb. 21, 2019, 6 a.m. 11.9 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A 3.0 ppb (4) N/A N/A 10.0 μg/m3 (9) N/A 11.0
 
Feb. 21, 2019, 5 a.m. 12.0 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A 5.0 ppb (7) N/A N/A 11.0 μg/m3 (10) N/A 11.0
 
Feb. 21, 2019, 4 a.m. 13.0 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 12.0
 
Feb. 21, 2019, 3 a.m. 13.6 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) N/A 13.0
 
Feb. 21, 2019, 2 a.m. 12.4 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 11.0
 
Feb. 21, 2019, 1 a.m. 13.0 ppb (12) 1.1 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) N/A 12.0
 
Feb. 21, 2019, midnight 16.0 ppb (15) 0.9 ppb (1) N/A 15.0 ppb (14) N/A 3.0 ppb (4) N/A N/A 11.0 μg/m3 (10) N/A 15.0
 
Feb. 20, 2019, 11 p.m. 10.9 ppb (10) 1.1 ppb (1) N/A 10.0 ppb (9) N/A 3.0 ppb (4) N/A N/A 10.0 μg/m3 (9) N/A 10.0
 
Feb. 20, 2019, 10 p.m. 8.0 ppb (7) 1.1 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
 
Feb. 20, 2019, 9 p.m. 9.0 ppb (8) 1.4 ppb (1) N/A 8.0 ppb (7) N/A 4.0 ppb (6) N/A N/A 8.0 μg/m3 (7) N/A 8.0
 
Feb. 20, 2019, 8 p.m. 8.3 ppb (8) 1.4 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
 
Feb. 20, 2019, 7 p.m. 7.5 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) N/A 7.0