AQSQID: 060130002

Site Name: Concord

Location: Concord, CA

Reporting: True, Located: True

Current AQI: 29.0

Concord CA, US: 37.9383, -122.025

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 26, 2019, 8 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 26, 2019, 7 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 26, 2019, 6 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 26, 2019, 5 a.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 26, 2019, 4 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 26, 2019, 3 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 26, 2019, 2 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 26, 2019, 1 a.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 26, 2019, midnight 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 25, 2019, 11 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 25, 2019, 10 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 49.0 ppb (38) 0.25 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 25, 2019, 9 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 49.0 ppb (38) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 25, 2019, 8 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 47.0 ppb (36) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 25, 2019, 7 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 45.0 ppb (35) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 25, 2019, 6 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 25, 2019, 5 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.24 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
May 25, 2019, 4 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.24 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
May 25, 2019, 3 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.24 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
May 25, 2019, 2 p.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 25, 2019, 1 p.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 25, 2019, noon 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 25, 2019, 11 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
May 25, 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
 
May 25, 2019, 9 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 25, 2019, 8 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 25, 2019, 7 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 25, 2019, 6 a.m. 2.3 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
May 25, 2019, 5 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 25, 2019, 4 a.m. 2.8 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 25, 2019, 3 a.m. 5.6 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 28.0 ppb (22) 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 25, 2019, 2 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 32.0 ppb (25) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 25, 2019, 1 a.m. 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
May 25, 2019, midnight 5.5 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 33.0 ppb (25) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
May 24, 2019, 11 p.m. 4.2 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 29.0
 
May 24, 2019, 10 p.m. 3.2 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 40.0 ppb (31) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
May 24, 2019, 9 p.m. 3.0 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
May 24, 2019, 8 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
May 24, 2019, 7 p.m. 3.7 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 6 p.m. 3.8 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
May 24, 2019, 5 p.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
May 24, 2019, 4 p.m. 4.9 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 27.0 ppb (21) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
May 24, 2019, 3 p.m. 4.3 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 26.0 ppb (20) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 2 p.m. 3.5 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 1 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
May 24, 2019, noon 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
May 24, 2019, 11 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 24, 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
 
May 24, 2019, 9 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 22.0 ppb (17) 0.27 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 24, 2019, 8 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 22.0 ppb (17) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 7 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 23.0 ppb (18) 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 24, 2019, 6 a.m. 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 22.0 ppb (17) 0.28 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 24, 2019, 5 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 24, 2019, 4 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 26.0 ppb (20) 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 24, 2019, 3 a.m. 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 27.0 ppb (21) 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 24, 2019, 2 a.m. 4.4 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 24, 2019, 1 a.m. 4.3 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 32.0 ppb (25) 0.29 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
May 24, 2019, midnight 4.1 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 11 p.m. 5.0 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.29 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
May 23, 2019, 10 p.m. 4.5 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 39.0 ppb (30) 0.29 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
May 23, 2019, 9 p.m. 3.7 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) 0.28 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 8 p.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 23, 2019, 7 p.m. 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 23, 2019, 6 p.m. 4.8 ppb (4) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 23, 2019, 5 p.m. 6.2 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) 0.31 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
May 23, 2019, 4 p.m. 4.0 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 25.0 ppb (19) 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 23, 2019, 3 p.m. 3.8 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 25.0 ppb (19) 0.28 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 2 p.m. 5.5 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 20.0 ppb (15) 0.31 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
May 23, 2019, 1 p.m. 5.8 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 18.0 ppb (14) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 23, 2019, noon 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 20.0 ppb (15) 0.27 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 23, 2019, 11 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 19.0 ppb (15) 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 23, 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
 
May 23, 2019, 9 a.m. 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 23.0 ppb (18) 0.27 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 23, 2019, 8 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 23, 2019, 7 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 25.0 ppb (19) 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
May 23, 2019, 6 a.m. 5.1 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 22.0 ppb (17) 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 4 a.m. 7.6 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 24.0 ppb (18) 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 3 a.m. 7.6 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 27.0 ppb (21) 0.31 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
May 23, 2019, 2 a.m. 5.1 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 31.0 ppb (24) 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
May 23, 2019, 1 a.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
May 23, 2019, midnight 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 22, 2019, 11 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
May 22, 2019, 10 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 29.0
 
May 22, 2019, 9 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.23 ppb (3) N/A 1.0 μg/m3 (4) 29.0
 
May 22, 2019, 8 p.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 29.0
 
May 22, 2019, 7 p.m. 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 27.0
 
May 22, 2019, 6 p.m. 4.2 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
May 22, 2019, 5 p.m. 4.7 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 33.0 ppb (25) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
May 22, 2019, 4 p.m. 6.4 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 31.0 ppb (24) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 24.0
 
May 22, 2019, 3 p.m. 9.9 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 3.0 ppb (4) 25.0 ppb (19) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 22, 2019, 2 p.m. 9.0 ppb (8) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 23.0 ppb (18) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 1 p.m. 9.9 ppb (9) 1.1 ppb (1) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 14.0 ppb (11) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 22, 2019, noon 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 22, 2019, 11 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
May 22, 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
 
May 22, 2019, 9 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
May 22, 2019, 8 a.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 22, 2019, 7 a.m. 0.8 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 22, 2019, 6 a.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
May 22, 2019, 5 a.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
May 22, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
May 22, 2019, 3 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
May 22, 2019, 2 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 22, 2019, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 22, 2019, midnight 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
May 21, 2019, 11 p.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 33.0
 
May 21, 2019, 10 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 21, 2019, 9 p.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 33.0
 
May 21, 2019, 8 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 34.0
 
May 21, 2019, 7 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
May 21, 2019, 6 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
May 21, 2019, 5 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.22 ppb (2) N/A 3.0 μg/m3 (12) 31.0
 
May 21, 2019, 4 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
May 21, 2019, 3 p.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
May 21, 2019, 2 p.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
May 21, 2019, 1 p.m. 4.1 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
May 21, 2019, noon 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 33.0 ppb (25) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 21, 2019, 11 a.m. 2.2 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 27.0
 
May 21, 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
 
May 21, 2019, 9 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 30.0
 
May 21, 2019, 8 a.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 30.0
 
May 19, 2019, 7 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 50.0 ppb (38) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 38.0
 
May 19, 2019, 6 p.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 46.0 ppb (35) 0.26 ppb (3) N/A 7.0 μg/m3 (29) 35.0
 
May 19, 2019, 5 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 46.0 ppb (35) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 35.0
 
May 19, 2019, 4 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 33.0
 
May 19, 2019, 3 p.m. 4.1 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 40.0 ppb (31) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 31.0
 
May 19, 2019, 2 p.m. 1.6 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 50.0 ppb (38) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 38.0
 
May 19, 2019, 1 p.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 32.0
 
May 19, 2019, noon 1.6 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
May 19, 2019, 11 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
May 19, 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
 
May 19, 2019, 9 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 26.0
 
May 19, 2019, 8 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
May 19, 2019, 7 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
May 19, 2019, 6 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 30.0
 
May 19, 2019, 5 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 34.0
 
May 19, 2019, 4 a.m. 1.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 30.0
 
May 19, 2019, 3 a.m. 1.6 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 28.0
 
May 19, 2019, 2 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
May 19, 2019, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 29.0
 
May 19, 2019, midnight 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 31.0
 
May 18, 2019, 11 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
May 18, 2019, 10 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
May 18, 2019, 9 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
May 18, 2019, 8 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
May 18, 2019, 7 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
May 18, 2019, 6 p.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 33.0 ppb (25) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 18, 2019, 5 p.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
May 18, 2019, 4 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
May 18, 2019, 3 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 32.0 ppb (25) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
May 18, 2019, 2 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 30.0 ppb (23) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 23.0
 
May 18, 2019, 1 p.m. 6.4 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 17.0 ppb (13) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 13.0
 
May 18, 2019, noon 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 22.0 ppb (17) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 2019, 11 a.m. 4.8 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 15.0 ppb (12) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 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
 
May 18, 2019, 9 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 17.0 ppb (13) 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
May 18, 2019, 8 a.m. 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 19.0 ppb (15) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
May 18, 2019, 7 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 22.0 ppb (17) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2019, 6 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
May 18, 2019, 5 a.m. 3.5 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
May 18, 2019, 4 a.m. 2.6 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
May 18, 2019, 3 a.m. 2.4 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
May 18, 2019, 2 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
May 18, 2019, 1 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 18, 2019, midnight 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 42.0 ppb (32) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
May 17, 2019, 11 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 34.0
 
May 17, 2019, 10 p.m. 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 44.0 ppb (34) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 34.0
 
May 17, 2019, 9 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 34.0