ID: 119

AQSQID: 060130002

Site Name: Concord

Added: April 21, 2020, 6:24 p.m.

Updated: March 4, 2021, 11:31 a.m.

Location: Concord (Chevron), CA

Reporting: True, Located: True

Current AQI: 42.0

Concord (Chevron) CA, US: 37.9383, -122.025

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 9 a.m. 4.1 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.11 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 8 a.m. 3.9 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.11 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 7 a.m. 3.3 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (33) 0.11 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 6 a.m. 2.7 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (34) 0.11 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 5 a.m. 2.4 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (34) 0.12 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 4 a.m. 2.4 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (34) 0.12 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
March 4, 2021, 3 a.m. 3.1 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.13 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 2 a.m. 3.4 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) N/A 14.0 μg/m3 (55) 55.0
 
March 4, 2021, 1 a.m. 3.8 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 13.0 μg/m3 (53) 53.0
 
March 4, 2021, midnight 4.6 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 11 p.m. 6.7 ppb (7) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (32) 0.21 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 10 p.m. 9.1 ppb (9) 0.7 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 37.0 ppb (35) 0.24 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 9 p.m. 10.3 ppb (10) 1.5 ppb (2) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 37.0 ppb (35) 0.31 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 8 p.m. 6.6 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 38.0 ppb (36) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 7 p.m. 8.3 ppb (8) 1.2 ppb (2) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 33.0 ppb (31) 0.26 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 6 p.m. 10.1 ppb (10) 1.5 ppb (2) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 26.0 ppb (25) 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, 5 p.m. 14.4 ppb (14) 2.7 ppb (3) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 19.0 ppb (18) 0.34 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 4 p.m. 24.6 ppb (24) 7.0 ppb (7) N/A 18.0 ppb (17) N/A 1.0 ppb (2) 11.0 ppb (11) 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, 3 p.m. 31.6 ppb (30) 8.0 ppb (8) N/A 24.0 ppb (23) N/A 1.0 ppb (2) 3.0 ppb (3) 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, 2 p.m. 23.0 ppb (22) 2.3 ppb (3) N/A 21.0 ppb (20) N/A 1.0 ppb (2) 6.0 ppb (6) 0.35 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 1 p.m. 18.2 ppb (18) 0.5 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 5.0 ppb (5) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 3, 2021, noon 14.6 ppb (14) 0.3 ppb (1) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 6.0 ppb (6) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 11 a.m. 11.8 ppb (12) -0.1 ppb (0) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 9.0 ppb (9) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
March 3, 2021, 9 a.m. 7.4 ppb (7) -0.2 ppb (0) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 19.0 ppb (18) 0.22 ppb (3) N/A 2.0 μg/m3 (9) 18.0
 
March 3, 2021, 8 a.m. 6.7 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 21.0 ppb (20) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 3, 2021, 7 a.m. 7.3 ppb (7) -0.2 ppb (0) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 21.0 ppb (20) 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 6 a.m. 7.1 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 24.0 ppb (23) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 3, 2021, 5 a.m. 11.6 ppb (11) -0.1 ppb (0) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 20.0 ppb (19) 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 4 a.m. 13.0 ppb (13) -0.2 ppb (0) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 21.0 ppb (20) 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 3 a.m. 15.9 ppb (15) -0.1 ppb (0) N/A 16.0 ppb (16) N/A 2.0 ppb (3) 26.0 ppb (25) 0.38 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
March 3, 2021, 2 a.m. 12.5 ppb (12) -0.2 ppb (0) N/A 13.0 ppb (13) N/A 3.0 ppb (5) 35.0 ppb (33) 0.31 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 1 a.m. 8.2 ppb (8) -0.1 ppb (0) N/A 8.0 ppb (8) N/A 2.0 ppb (3) 41.0 ppb (38) 0.26 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, midnight 6.9 ppb (7) 0.1 ppb (1) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 43.0 ppb (40) 0.23 ppb (3) N/A 8.0 μg/m3 (34) 40.0
 
March 2, 2021, 11 p.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 46.0 ppb (43) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 43.0
 
March 2, 2021, 10 p.m. 2.3 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 43.0
 
March 2, 2021, 9 p.m. 2.3 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 41.0
 
March 2, 2021, 8 p.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 39.0
 
March 2, 2021, 7 p.m. 2.9 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 41.0 ppb (38) 0.21 ppb (3) N/A N/A 38.0
 
March 2, 2021, 6 p.m. 3.8 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 40.0 ppb (38) 0.22 ppb (3) N/A 8.0 μg/m3 (34) 38.0
 
March 2, 2021, 5 p.m. 3.5 ppb (4) 0.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 40.0 ppb (38) 0.22 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 4 p.m. 4.4 ppb (5) 0.1 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 38.0 ppb (36) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 3 p.m. 13.2 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 28.0 ppb (26) 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 2 p.m. 17.3 ppb (17) 0.3 ppb (1) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 22.0 ppb (21) 0.27 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 2, 2021, 1 p.m. 12.9 ppb (13) -0.1 ppb (0) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 20.0 ppb (19) 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 2, 2021, noon 17.0 ppb (17) 0.0 ppb (0) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 8.0 ppb (8) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 2, 2021, 11 a.m. 15.1 ppb (15) 0.0 ppb (0) N/A 15.0 ppb (15) N/A 1.0 ppb (2) 9.0 ppb (9) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 9 a.m. 9.6 ppb (10) -0.2 ppb (0) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 17.0 ppb (16) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 8 a.m. 9.2 ppb (9) -0.2 ppb (0) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 18.0 ppb (17) 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 7 a.m. 9.2 ppb (9) -0.2 ppb (0) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 17.0 ppb (16) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 6 a.m. 8.1 ppb (8) -0.2 ppb (0) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 22.0 ppb (21) 0.21 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 5 a.m. 14.8 ppb (14) -0.1 ppb (0) N/A 15.0 ppb (15) N/A 1.0 ppb (2) 16.0 ppb (15) 0.35 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
March 2, 2021, 4 a.m. 12.6 ppb (12) -0.2 ppb (0) N/A 13.0 ppb (13) N/A 2.0 ppb (3) 24.0 ppb (23) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 2, 2021, 3 a.m. 11.9 ppb (12) -0.2 ppb (0) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 28.0 ppb (26) 0.26 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
March 2, 2021, 2 a.m. 10.5 ppb (10) -0.2 ppb (0) N/A 11.0 ppb (11) N/A 1.0 ppb (2) 35.0 ppb (33) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 1 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 42.0 ppb (39) 0.18 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 2, 2021, midnight 1.6 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (47) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 47.0
 
March 1, 2021, 11 p.m. 2.3 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 49.0 ppb (46) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 46.0
 
March 1, 2021, 10 p.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
 
March 1, 2021, 9 p.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
 
March 1, 2021, 8 p.m. 3.1 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) 0.26 ppb (4) N/A 6.0 μg/m3 (25) 41.0
 
March 1, 2021, 7 p.m. 11.3 ppb (11) 2.5 ppb (3) N/A 9.0 ppb (9) N/A 3.0 ppb (5) 32.0 ppb (30) 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
March 1, 2021, 6 p.m. 16.8 ppb (16) 4.7 ppb (5) N/A 12.0 ppb (12) N/A 2.0 ppb (3) 24.0 ppb (23) 0.43 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 5 p.m. 17.1 ppb (17) 5.3 ppb (5) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 19.0 ppb (18) 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 1, 2021, 4 p.m. 18.5 ppb (18) 5.8 ppb (6) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 15.0 ppb (14) 0.37 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 3 p.m. 31.2 ppb (30) 11.1 ppb (11) N/A 20.0 ppb (19) N/A 1.0 ppb (2) 5.0 ppb (5) 0.4 ppb (5) N/A 6.0 μg/m3 (25) 30.0
 
March 1, 2021, 2 p.m. 33.5 ppb (32) 10.3 ppb (10) N/A 23.0 ppb (22) N/A 0.0 ppb (0) 0.0 ppb (0) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 32.0
 
March 1, 2021, 1 p.m. 22.3 ppb (22) 2.5 ppb (3) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 1.0 ppb (1) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
March 1, 2021, noon 17.0 ppb (17) 0.4 ppb (1) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 3.0 ppb (3) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 11 a.m. 13.7 ppb (13) 0.1 ppb (1) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 7.0 ppb (7) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 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 (13) 13.0
 
March 1, 2021, 9 a.m. 10.8 ppb (11) -0.1 ppb (0) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 10.0 ppb (10) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 5 a.m. 4.9 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 1, 2021, 4 a.m. 4.4 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (25) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
March 1, 2021, 3 a.m. 4.4 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (28) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 28.0
 
March 1, 2021, 2 a.m. 6.8 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 32.0 ppb (30) 0.35 ppb (4) N/A 6.0 μg/m3 (25) 30.0
 
March 1, 2021, 1 a.m. 3.2 ppb (4) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 37.0 ppb (35) 0.26 ppb (4) N/A 8.0 μg/m3 (34) 35.0
 
March 1, 2021, midnight 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.26 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 28, 2021, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (36) 0.25 ppb (3) N/A 2.0 μg/m3 (9) 36.0
 
Feb. 28, 2021, 10 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 35.0
 
Feb. 28, 2021, 9 p.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 35.0
 
Feb. 28, 2021, 8 p.m. 1.4 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 28, 2021, 7 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 33.0
 
Feb. 28, 2021, 6 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
Feb. 28, 2021, 5 p.m. 3.0 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
Feb. 28, 2021, 4 p.m. 12.2 ppb (12) 2.8 ppb (3) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 23.0 ppb (22) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 28, 2021, 3 p.m. 24.1 ppb (23) 6.5 ppb (7) N/A 18.0 ppb (17) N/A 1.0 ppb (2) 7.0 ppb (7) 0.39 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 2 p.m. 20.6 ppb (20) 1.7 ppb (2) N/A 19.0 ppb (18) N/A 1.0 ppb (2) 3.0 ppb (3) 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 1 p.m. 20.9 ppb (20) 3.4 ppb (4) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 1.0 ppb (1) 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 2 a.m. 2.6 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 30.0 ppb (28) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
Feb. 28, 2021, 1 a.m. 2.7 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 33.0 ppb (31) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 31.0
 
Feb. 28, 2021, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 36.0
 
Feb. 27, 2021, 11 p.m. 1.4 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Feb. 27, 2021, 10 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Feb. 27, 2021, 9 p.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 27, 2021, 8 p.m. 2.6 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
Feb. 27, 2021, 7 p.m. 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 33.0 ppb (31) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
Feb. 27, 2021, 6 p.m. 4.9 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 32.0 ppb (30) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 30.0
 
Feb. 27, 2021, 5 p.m. 6.7 ppb (7) 1.4 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 27.0 ppb (25) 0.29 ppb (4) N/A 4.0 μg/m3 (17) 25.0
 
Feb. 27, 2021, 4 p.m. 7.6 ppb (8) 1.4 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 24.0 ppb (23) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
Feb. 27, 2021, 3 p.m. 14.9 ppb (15) 2.6 ppb (3) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 10.0 ppb (10) 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 27, 2021, 2 p.m. 10.0 ppb (10) 0.1 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 11.0 ppb (11) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 27, 2021, 4 a.m. 3.7 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (26) 0.26 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Feb. 27, 2021, 3 a.m. 3.3 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 27, 2021, 2 a.m. 3.0 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 27, 2021, 1 a.m. 2.1 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 27, 2021, midnight 1.4 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 26, 2021, 11 p.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 10 p.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 26, 2021, 9 p.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
Feb. 26, 2021, 8 p.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 31.0
 
Feb. 26, 2021, 7 p.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.3 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
Feb. 26, 2021, 6 p.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Feb. 26, 2021, 5 p.m. 9.2 ppb (9) 2.4 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 23.0 ppb (22) 0.3 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Feb. 26, 2021, 4 p.m. 8.4 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 21.0 ppb (20) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 26, 2021, 3 p.m. 19.1 ppb (19) 5.8 ppb (6) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 9.0 ppb (9) 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 2 p.m. 25.5 ppb (25) 6.3 ppb (6) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 1.0 ppb (1) 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 26, 2021, 1 p.m. 18.8 ppb (18) 2.3 ppb (3) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 2.0 ppb (2) 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, noon 14.3 ppb (14) 0.6 ppb (1) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 4.0 ppb (4) 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 26, 2021, 11 a.m. 10.2 ppb (10) -0.1 ppb (0) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 9.0 ppb (9) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 26, 2021, 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
 
Feb. 26, 2021, 9 a.m. 6.4 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 15.0 ppb (14) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 26, 2021, 8 a.m. 8.6 ppb (9) -0.2 ppb (0) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (13) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 26, 2021, 7 a.m. 6.3 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 18.0 ppb (17) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 26, 2021, 6 a.m. 9.0 ppb (9) -0.2 ppb (0) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 19.0 ppb (18) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 26, 2021, 5 a.m. 11.6 ppb (11) -0.2 ppb (0) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 17.0 ppb (16) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 26, 2021, 4 a.m. 6.3 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 26.0 ppb (25) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 3 a.m. 7.5 ppb (8) -0.2 ppb (0) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 28.0 ppb (26) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Feb. 26, 2021, 2 a.m. 6.6 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 32.0 ppb (30) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Feb. 26, 2021, 1 a.m. 4.9 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 39.0 ppb (37) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Feb. 26, 2021, midnight 4.0 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 42.0 ppb (39) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 39.0
 
Feb. 25, 2021, 11 p.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 41.0 ppb (38) 0.2 ppb (3) N/A 0.0 μg/m3 (0) 38.0
 
Feb. 25, 2021, 10 p.m. 2.2 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 38.0
 
Feb. 25, 2021, 9 p.m. 2.3 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 38.0
 
Feb. 25, 2021, 8 p.m. 2.2 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 38.0
 
Feb. 25, 2021, 7 p.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 38.0
 
Feb. 25, 2021, 6 p.m. 3.9 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 36.0
 
Feb. 25, 2021, 5 p.m. 10.9 ppb (11) 2.3 ppb (3) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (28) 0.3 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
Feb. 25, 2021, 4 p.m. 24.7 ppb (24) 6.5 ppb (7) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 19.0 ppb (18) 0.41 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 25, 2021, 3 p.m. 30.3 ppb (29) 6.4 ppb (7) N/A 24.0 ppb (23) N/A 0.0 ppb (0) 12.0 ppb (12) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 29.0
 
Feb. 25, 2021, 2 p.m. 15.4 ppb (15) 0.0 ppb (0) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 21.0 ppb (20) 0.26 ppb (4) N/A 1.0 μg/m3 (5) 20.0
 
Feb. 25, 2021, 1 p.m. 4.9 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (30) 0.21 ppb (3) N/A 2.0 μg/m3 (9) 30.0
 
Feb. 25, 2021, noon 1.0 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 36.0
 
Feb. 25, 2021, 11 a.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 36.0
 
Feb. 25, 2021, 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 (5) 5.0
 
Feb. 25, 2021, 9 a.m. 0.7 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 36.0
 
Feb. 25, 2021, 8 a.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 37.0
 
Feb. 25, 2021, 7 a.m. 1.1 ppb (2) -0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Feb. 25, 2021, 6 a.m. 1.7 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Feb. 25, 2021, 5 a.m. 2.5 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 36.0
 
Feb. 25, 2021, 4 a.m. 2.5 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 36.0
 
Feb. 25, 2021, 3 a.m. 3.4 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 36.0
 
Feb. 25, 2021, 2 a.m. 5.5 ppb (6) 0.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Feb. 25, 2021, 1 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 36.0
 
Feb. 25, 2021, midnight 3.8 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (38) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 38.0
 
Feb. 24, 2021, 11 p.m. 2.6 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 40.0
 
Feb. 24, 2021, 10 p.m. 1.9 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 39.0
 
Feb. 24, 2021, 9 p.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 39.0
 
Feb. 24, 2021, 8 p.m. 1.8 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 38.0
 
Feb. 24, 2021, 7 p.m. 3.4 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
Feb. 24, 2021, 6 p.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 34.0 ppb (32) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
Feb. 24, 2021, 5 p.m. 16.9 ppb (16) 5.2 ppb (5) N/A 12.0 ppb (12) N/A 2.0 ppb (3) 21.0 ppb (20) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 24, 2021, 4 p.m. 34.6 ppb (33) 15.3 ppb (15) N/A 19.0 ppb (18) N/A 1.0 ppb (2) 8.0 ppb (8) 0.46 ppb (6) N/A 6.0 μg/m3 (25) 33.0
 
Feb. 24, 2021, 3 p.m. 39.2 ppb (37) 17.9 ppb (17) N/A 21.0 ppb (20) N/A 0.0 ppb (0) 2.0 ppb (2) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 37.0
 
Feb. 24, 2021, 2 p.m. 24.5 ppb (24) 4.7 ppb (5) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 1.0 ppb (1) 0.28 ppb (4) N/A 3.0 μg/m3 (13) 24.0
 
Feb. 24, 2021, 1 p.m. 13.0 ppb (13) 0.3 ppb (1) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 5.0 ppb (5) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0