AQSQID: 060130002

Site Name: Concord

Location: Concord, CA

Reporting: True, Located: True

Current AQI: 42.0

Concord CA, US: 37.9383, -122.025

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 17, 2019, 8 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 17, 2019, 7 a.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 17, 2019, 6 a.m. 1.0 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 17, 2019, 5 a.m. 1.2 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 17, 2019, 4 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 17, 2019, 3 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.3 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 17, 2019, 2 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) 0.31 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 17, 2019, 1 a.m. 3.7 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 17, 2019, midnight 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
July 16, 2019, 11 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
July 16, 2019, 10 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
July 16, 2019, 9 p.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
July 16, 2019, 8 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
July 16, 2019, 7 p.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 16, 2019, 6 p.m. 3.1 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 16, 2019, 5 p.m. 3.2 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) 0.33 ppb (4) N/A N/A 15.0
 
July 16, 2019, 4 p.m. 4.0 ppb (4) 1.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 15.0 ppb (12) 0.32 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
July 16, 2019, 3 p.m. 3.6 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 13.0 ppb (10) 0.32 ppb (4) N/A 2.0 μg/m3 (8) 10.0
 
July 16, 2019, 2 p.m. 4.9 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 11.0 ppb (8) 0.32 ppb (4) N/A 2.0 μg/m3 (8) 8.0
 
July 16, 2019, 1 p.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 9.0 ppb (7) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 16, 2019, noon 2.6 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 11.0 ppb (8) 0.29 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
July 16, 2019, 11 a.m. 1.8 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 12.0 ppb (9) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 16, 2019, 9 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 13.0 ppb (10) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 16, 2019, 8 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 13.0 ppb (10) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 16, 2019, 7 a.m. 2.3 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) 0.29 ppb (3) N/A 1.0 μg/m3 (4) 11.0
 
July 16, 2019, 6 a.m. 2.6 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 15.0 ppb (12) 0.29 ppb (3) N/A 2.0 μg/m3 (8) 12.0
 
July 16, 2019, 5 a.m. 3.7 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (12) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 16, 2019, 4 a.m. 4.8 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 17.0 ppb (13) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 16, 2019, 3 a.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (15) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 16, 2019, 2 a.m. 5.4 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 18.0
 
July 16, 2019, 1 a.m. 6.8 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.37 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 16, 2019, midnight 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.32 ppb (4) N/A 3.0 μg/m3 (12) 24.0
 
July 15, 2019, 11 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 24.0
 
July 15, 2019, 10 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 9 p.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
July 15, 2019, 8 p.m. 3.8 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (34) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 34.0
 
July 15, 2019, 7 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
July 15, 2019, 6 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
July 15, 2019, 5 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 4 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 3 p.m. 3.7 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 2 p.m. 4.8 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 15, 2019, 1 p.m. 5.3 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (12) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 15, 2019, noon 4.6 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 17.0 ppb (13) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 15, 2019, 11 a.m. 3.1 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (13) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 9 a.m. 3.3 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (13) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 15, 2019, 8 a.m. 3.4 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (14) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 7 a.m. 4.6 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (14) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 15, 2019, 6 a.m. 3.6 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 5 a.m. 4.4 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 21.0 ppb (16) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 15, 2019, 4 a.m. 3.8 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (18) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 3 a.m. 3.7 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 2 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 15, 2019, 1 a.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 15, 2019, midnight 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 11 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 30.0
 
July 14, 2019, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 9 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 31.0
 
July 14, 2019, 8 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 14, 2019, 7 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 14, 2019, 6 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 5 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 14, 2019, 4 p.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (16) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 14, 2019, 3 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 2 p.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 17.0 ppb (13) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 1 p.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 14, 2019, noon 2.2 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 11 a.m. 2.1 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, 9 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 8 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (12) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 7 a.m. 4.3 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (12) 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 14, 2019, 6 a.m. 5.1 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (12) 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 5 a.m. 5.4 ppb (5) -0.1 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 17.0 ppb (13) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, 4 a.m. 3.9 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (16) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, 3 a.m. 3.8 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (18) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 14, 2019, 2 a.m. 4.7 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, 1 a.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 14, 2019, midnight 3.7 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 40.0 ppb (31) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 13, 2019, 11 p.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 46.0 ppb (35) 0.36 ppb (4) N/A 5.0 μg/m3 (21) 35.0
 
July 13, 2019, 10 p.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 48.0 ppb (37) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 37.0
 
July 13, 2019, 9 p.m. 2.5 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 45.0 ppb (35) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 35.0
 
July 13, 2019, 8 p.m. 3.2 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 44.0 ppb (34) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 34.0
 
July 13, 2019, 7 p.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 13, 2019, 6 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, 5 p.m. 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) 0.32 ppb (4) N/A 3.0 μg/m3 (12) 17.0
 
July 13, 2019, 4 p.m. 2.9 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 17.0 ppb (13) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 13.0
 
July 13, 2019, 3 p.m. 3.0 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 13, 2019, 2 p.m. 2.3 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 13.0 ppb (10) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 13, 2019, 1 p.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 13.0 ppb (10) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 10.0
 
July 13, 2019, noon 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
July 13, 2019, 11 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 14.0 ppb (11) 0.27 ppb (3) N/A 1.0 μg/m3 (4) 11.0
 
July 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 13, 2019, 9 a.m. 2.4 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 13.0 ppb (10) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 13, 2019, 8 a.m. 2.1 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 13, 2019, 7 a.m. 2.5 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 14.0 ppb (11) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, 6 a.m. 3.0 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 14.0 ppb (11) 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 13, 2019, 5 a.m. 4.0 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 13, 2019, 4 a.m. 4.8 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, 3 a.m. 4.7 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 17.0 ppb (13) 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 13, 2019, 2 a.m. 5.5 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 19.0 ppb (15) 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 13, 2019, 1 a.m. 8.4 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 20.0 ppb (15) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 13, 2019, midnight 6.5 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.37 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
July 12, 2019, 11 p.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 32.0
 
July 12, 2019, 10 p.m. 4.0 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 51.0 ppb (39) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 39.0
 
July 12, 2019, 9 p.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 54.0 ppb (42) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 42.0
 
July 12, 2019, 8 p.m. 4.4 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.39 ppb (4) N/A 5.0 μg/m3 (21) 37.0
 
July 12, 2019, 7 p.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.39 ppb (4) N/A 3.0 μg/m3 (12) 28.0
 
July 12, 2019, 6 p.m. 3.9 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
July 12, 2019, 5 p.m. 3.9 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 19.0 ppb (15) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 12, 2019, 4 p.m. 5.3 ppb (5) 2.5 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 13.0 ppb (10) 0.34 ppb (4) N/A N/A 10.0
 
July 12, 2019, 3 p.m. 4.8 ppb (4) 2.2 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (9) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 12, 2019, 2 p.m. 4.1 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 11.0 ppb (8) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 12, 2019, 1 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 9.0 ppb (7) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 12, 2019, noon 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 10.0 ppb (8) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 12, 2019, 11 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 11.0 ppb (8) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 12, 2019, 9 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 11.0 ppb (8) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 12, 2019, 8 a.m. 2.9 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 11.0 ppb (8) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
July 12, 2019, 7 a.m. 3.2 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (9) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 9.0
 
July 12, 2019, 6 a.m. 3.3 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (9) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 12, 2019, 5 a.m. 3.1 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 14.0 ppb (11) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 12, 2019, 4 a.m. 4.1 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 12, 2019, 3 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (12) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 12, 2019, 2 a.m. 4.0 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (14) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 12, 2019, 1 a.m. 5.1 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 21.0 ppb (16) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 12, 2019, midnight 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (16) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 16.0
 
July 11, 2019, 11 p.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 16.0
 
July 11, 2019, 10 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 9 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
July 11, 2019, 8 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
July 11, 2019, 7 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
July 11, 2019, 6 p.m. 3.7 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.31 ppb (3) N/A 2.0 μg/m3 (8) 18.0
 
July 11, 2019, 5 p.m. 3.7 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.32 ppb (4) N/A 1.0 μg/m3 (4) 14.0
 
July 11, 2019, 4 p.m. 4.7 ppb (4) 2.2 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 13.0 ppb (10) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 10.0
 
July 11, 2019, 3 p.m. 4.5 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 11.0 ppb (8) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 2 p.m. 4.7 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 9.0 ppb (7) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 1 p.m. 4.5 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 7.0 ppb (5) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, noon 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 7.0 ppb (5) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 11, 2019, 11 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 8.0 ppb (6) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 11, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 9 a.m. 4.6 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 9.0 ppb (7) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 11, 2019, 8 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 8.0 ppb (6) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 7 a.m. 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (7) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 11, 2019, 6 a.m. 3.8 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 11.0 ppb (8) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
July 11, 2019, 5 a.m. 4.8 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 11.0 ppb (8) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 11, 2019, 4 a.m. 6.8 ppb (6) -0.1 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 9.0 ppb (7) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 11, 2019, 3 a.m. 6.9 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 10.0 ppb (8) 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 11, 2019, 2 a.m. 3.9 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (14) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 11, 2019, 1 a.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.29 ppb (3) N/A 1.0 μg/m3 (4) 18.0
 
July 11, 2019, midnight 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) 0.27 ppb (3) N/A 2.0 μg/m3 (8) 19.0
 
July 10, 2019, 11 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 21.0
 
July 10, 2019, 10 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
July 10, 2019, 9 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 10, 2019, 8 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 10, 2019, 7 p.m. 8.7 ppb (8) 3.7 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 18.0 ppb (14) 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 10, 2019, 6 p.m. 8.1 ppb (8) 4.1 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 10, 2019, 5 p.m. 7.6 ppb (7) 4.2 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 11.0 ppb (8) 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 10, 2019, 4 p.m. 6.8 ppb (6) 3.3 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 10.0 ppb (8) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 10, 2019, 3 p.m. 4.8 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 9.0 ppb (7) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 10, 2019, 2 p.m. 3.8 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 9.0 ppb (7) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 10, 2019, 1 p.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 10.0 ppb (8) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 10, 2019, noon 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 10.0 ppb (8) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 10, 2019, 11 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 10.0 ppb (8) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
July 10, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
July 10, 2019, 9 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 11.0 ppb (8) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0