AQSQID: 060130002

Site Name: Concord

Location: Concord, CA

Reporting: True, Located: True

Current AQI: 25.0

Concord CA, US: 37.9383, -122.025

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 16, 2019, midnight 3.7 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2019, 11 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 31.0
 
Sept. 15, 2019, 10 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
Sept. 15, 2019, 9 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
Sept. 15, 2019, 8 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Sept. 15, 2019, 7 p.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
Sept. 15, 2019, 6 p.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 5 p.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 4 p.m. 1.8 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 20.0
 
Sept. 15, 2019, 3 p.m. 2.1 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 2 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 15, 2019, 1 p.m. 1.3 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 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, noon 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2019, 11 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 9 a.m. 1.3 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 3.0 μg/m3 (12) 20.0
 
Sept. 15, 2019, 8 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
Sept. 15, 2019, 7 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 6 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 15, 2019, 5 a.m. 6.4 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 4 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
Sept. 15, 2019, 3 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
Sept. 15, 2019, 2 a.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.22 ppb (2) N/A 2.0 μg/m3 (8) 28.0
 
Sept. 15, 2019, 1 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 34.0
 
Sept. 15, 2019, midnight 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.2 ppb (2) N/A 1.0 μg/m3 (4) 35.0
 
Sept. 14, 2019, 11 p.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 34.0
 
Sept. 14, 2019, 10 p.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 65.0 ppb (50) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 50.0
 
Sept. 14, 2019, 9 p.m. 8.3 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 4.0 ppb (6) 82.0 ppb (64) 0.39 ppb (4) N/A 11.0 μg/m3 (46) 64.0
 
Sept. 14, 2019, 8 p.m. 8.0 ppb (7) 0.6 ppb (1) N/A 8.0 ppb (7) N/A 3.0 ppb (4) 71.0 ppb (55) 0.4 ppb (4) N/A 14.0 μg/m3 (54) 55.0
 
Sept. 14, 2019, 7 p.m. 10.5 ppb (10) 1.3 ppb (1) N/A 9.0 ppb (8) N/A 5.0 ppb (7) 53.0 ppb (41) 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 14, 2019, 6 p.m. 11.7 ppb (11) 1.5 ppb (1) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 55.0 ppb (42) 0.46 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 5 p.m. 6.5 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2019, 4 p.m. 8.3 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 14, 2019, 3 p.m. 8.6 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.4 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2019, 2 p.m. 10.8 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 10.0 ppb (8) 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 14, 2019, 1 p.m. 7.5 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 11.0 ppb (8) 0.36 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 14, 2019, noon 7.9 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 11.0 ppb (8) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 14, 2019, 11 a.m. 6.9 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (10) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 9 a.m. 7.1 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2019, 8 a.m. 7.2 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 7 a.m. 7.2 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.4 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2019, 6 a.m. 6.0 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 14, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 14, 2019, 4 a.m. 6.6 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) 0.39 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 3 a.m. 7.7 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 46.0 ppb (35) 0.42 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 14, 2019, 2 a.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 61.0 ppb (47) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 47.0
 
Sept. 14, 2019, 1 a.m. 4.2 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 67.0 ppb (52) 0.3 ppb (3) N/A 9.0 μg/m3 (38) 52.0
 
Sept. 14, 2019, midnight 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 68.0 ppb (52) 0.29 ppb (3) N/A 9.0 μg/m3 (38) 52.0
 
Sept. 13, 2019, 11 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 64.0 ppb (49) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 49.0
 
Sept. 13, 2019, 10 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 65.0 ppb (50) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 50.0
 
Sept. 13, 2019, 9 p.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 65.0 ppb (50) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 50.0
 
Sept. 13, 2019, 8 p.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 67.0 ppb (52) 0.31 ppb (3) N/A 10.0 μg/m3 (42) 52.0
 
Sept. 13, 2019, 7 p.m. 3.5 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 64.0 ppb (49) 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 13, 2019, 6 p.m. 5.2 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 57.0 ppb (44) 0.39 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 13, 2019, 5 p.m. 8.9 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 48.0 ppb (37) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2019, 4 p.m. 12.0 ppb (11) 2.5 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 34.0 ppb (26) 0.46 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2019, 3 p.m. 19.7 ppb (18) 5.6 ppb (5) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 19.0 ppb (15) 0.48 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 13, 2019, 2 p.m. 26.3 ppb (24) 8.6 ppb (8) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 5.0 ppb (4) 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 13, 2019, 1 p.m. 12.3 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 7.0 ppb (5) 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 13, 2019, noon 8.0 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 10.0 ppb (8) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 13, 2019, 11 a.m. 6.8 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 10.0 ppb (8) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 13, 2019, 9 a.m. 6.7 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (11) 0.38 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 13, 2019, 8 a.m. 5.8 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (13) 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 13, 2019, 7 a.m. 4.7 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 24.0 ppb (18) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 13, 2019, 6 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 28.0 ppb (22) 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2019, 5 a.m. 7.5 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 28.0 ppb (22) 0.37 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2019, 4 a.m. 9.2 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 32.0 ppb (25) 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2019, 3 a.m. 14.9 ppb (14) 0.7 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 34.0 ppb (26) 0.46 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2019, 2 a.m. 14.4 ppb (13) 0.3 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 42.0 ppb (32) 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 13, 2019, 1 a.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 56.0 ppb (43) 0.3 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2019, midnight 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 58.0 ppb (45) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 45.0
 
Sept. 12, 2019, 11 p.m. 3.2 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 57.0 ppb (44) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 44.0
 
Sept. 12, 2019, 10 p.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 59.0 ppb (45) 0.3 ppb (3) N/A 9.0 μg/m3 (38) 45.0
 
Sept. 12, 2019, 9 p.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 56.0 ppb (43) 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 12, 2019, 8 p.m. 3.0 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (41) 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 12, 2019, 7 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) 0.3 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 12, 2019, 6 p.m. 4.8 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (34) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 34.0
 
Sept. 12, 2019, 5 p.m. 5.3 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 29.0
 
Sept. 12, 2019, 4 p.m. 8.1 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 12, 2019, 3 p.m. 15.5 ppb (14) 4.8 ppb (4) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 16.0 ppb (12) 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 12, 2019, 2 p.m. 18.4 ppb (17) 5.3 ppb (5) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 7.0 ppb (5) 0.48 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 1 p.m. 14.7 ppb (14) 2.8 ppb (3) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 7.0 ppb (5) 0.43 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, noon 8.5 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 9.0 ppb (7) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 12, 2019, 11 a.m. 5.0 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 12, 2019, 9 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 12, 2019, 8 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 7 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 12, 2019, 6 a.m. 3.9 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 12, 2019, 5 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 12, 2019, 4 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 3 a.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 2 a.m. 4.5 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 35.0
 
Sept. 12, 2019, 1 a.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 38.0
 
Sept. 12, 2019, midnight 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 53.0 ppb (41) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 41.0
 
Sept. 11, 2019, 11 p.m. 3.8 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 56.0 ppb (43) 0.28 ppb (3) N/A 8.0 μg/m3 (33) 43.0
 
Sept. 11, 2019, 10 p.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 55.0 ppb (42) 0.28 ppb (3) N/A 9.0 μg/m3 (38) 42.0
 
Sept. 11, 2019, 9 p.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 56.0 ppb (43) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 43.0
 
Sept. 11, 2019, 8 p.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (42) 0.3 ppb (3) N/A 9.0 μg/m3 (38) 42.0
 
Sept. 11, 2019, 7 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 11, 2019, 6 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 41.0 ppb (32) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 11, 2019, 5 p.m. 5.0 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 11, 2019, 4 p.m. 5.7 ppb (5) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 22.0 ppb (17) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 3 p.m. 8.3 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.37 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2019, 2 p.m. 9.7 ppb (9) 2.2 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 8.0 ppb (6) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2019, 1 p.m. 8.1 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 8.0 ppb (6) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, noon 4.7 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 12.0 ppb (9) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 11 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 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
 
Sept. 11, 2019, 9 a.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 19.0 ppb (15) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2019, 8 a.m. 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 19.0 ppb (15) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 7 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) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 11, 2019, 6 a.m. 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (15) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2019, 5 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 4 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 11, 2019, 3 a.m. 2.3 ppb (2) 0.1 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
 
Sept. 11, 2019, 2 a.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 11, 2019, 1 a.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 11, 2019, midnight 2.9 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Sept. 10, 2019, 11 p.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 32.0
 
Sept. 10, 2019, 10 p.m. 3.8 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 10, 2019, 9 p.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 36.0
 
Sept. 10, 2019, 8 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 35.0
 
Sept. 10, 2019, 7 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
Sept. 10, 2019, 6 p.m. 3.4 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 29.0
 
Sept. 10, 2019, 5 p.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
Sept. 10, 2019, 4 p.m. 3.3 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.29 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 10, 2019, 3 p.m. 3.3 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 10, 2019, 2 p.m. 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 19.0
 
Sept. 10, 2019, 1 p.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 21.0
 
Sept. 10, 2019, noon 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 10, 2019, 11 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 10, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2019, 9 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2019, 8 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 10, 2019, 7 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 10, 2019, 6 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 10, 2019, 4 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
Sept. 10, 2019, 3 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 24.0
 
Sept. 10, 2019, 2 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.29 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
Sept. 10, 2019, 1 a.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 10, 2019, midnight 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
Sept. 9, 2019, 11 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
Sept. 9, 2019, 10 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Sept. 9, 2019, 9 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 31.0
 
Sept. 9, 2019, 8 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.27 ppb (3) N/A N/A 31.0
 
Sept. 9, 2019, 7 p.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
Sept. 9, 2019, 6 p.m. 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 9, 2019, 5 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 9, 2019, 4 p.m. 3.5 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 9, 2019, 3 p.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 9, 2019, 2 p.m. 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 1 p.m. 3.8 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 9, 2019, noon 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 9, 2019, 11 a.m. 4.2 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 9, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 9, 2019, 9 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (13) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 9, 2019, 8 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 19.0 ppb (15) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 9, 2019, 7 a.m. 2.2 ppb (2) 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 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 6 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 5 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 9, 2019, 4 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 9, 2019, 3 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 2 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 1 a.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 24.0