ID: 119

AQSQID: 060130002

Site Name: Concord

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

Updated: Oct. 25, 2021, 10:04 a.m.

Location: Concord (Chevron), CA

Reporting: True, Located: True

Current AQI: 36.0

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
Oct. 25, 2021, 8 a.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) N/A -1.0 μg/m3 (0) 36.0
 
Oct. 25, 2021, 7 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 33.0
 
Oct. 25, 2021, 6 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Oct. 25, 2021, 5 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Oct. 25, 2021, 4 a.m. 1.9 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 32.0
 
Oct. 25, 2021, 3 a.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Oct. 25, 2021, 2 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 33.0
 
Oct. 25, 2021, 1 a.m. 2.1 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.24 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Oct. 25, 2021, midnight 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.25 ppb (3) N/A 2.0 μg/m3 (9) 28.0
 
Oct. 24, 2021, 11 p.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
Oct. 24, 2021, 10 p.m. 1.2 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Oct. 24, 2021, 9 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A -1.0 μg/m3 (0) 26.0
 
Oct. 24, 2021, 8 p.m. 1.2 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 26.0
 
Oct. 24, 2021, 7 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Oct. 24, 2021, 6 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
Oct. 24, 2021, 5 p.m. 1.3 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
Oct. 24, 2021, 4 p.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 26.0
 
Oct. 24, 2021, 3 p.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 25.0
 
Oct. 24, 2021, 2 p.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 26.0
 
Oct. 24, 2021, 1 p.m. 1.0 ppb (1) 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 27.0 ppb (25) 0.22 ppb (3) N/A 2.0 μg/m3 (9) 25.0
 
Oct. 24, 2021, noon 0.9 ppb (1) 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 26.0
 
Oct. 24, 2021, 11 a.m. 0.9 ppb (1) 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 27.0
 
Oct. 24, 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
 
Oct. 24, 2021, 9 a.m. 0.9 ppb (1) 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (27) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 27.0
 
Oct. 24, 2021, 8 a.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.22 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
Oct. 24, 2021, 7 a.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.22 ppb (3) N/A 0.0 μg/m3 (0) 26.0
 
Oct. 24, 2021, 6 a.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 25.0
 
Oct. 24, 2021, 5 a.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) 0.25 ppb (3) N/A 3.0 μg/m3 (13) 24.0
 
Oct. 24, 2021, 4 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Oct. 24, 2021, 3 a.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 28.0
 
Oct. 24, 2021, 2 a.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 26.0
 
Oct. 24, 2021, 1 a.m. 3.4 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Oct. 24, 2021, midnight 2.4 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 27.0
 
Oct. 23, 2021, 11 p.m. 1.6 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 31.0
 
Oct. 23, 2021, 10 p.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.21 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
Oct. 23, 2021, 9 p.m. 2.1 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.22 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
Oct. 23, 2021, 8 p.m. 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Oct. 23, 2021, 7 p.m. 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Oct. 23, 2021, 6 p.m. 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Oct. 23, 2021, 5 p.m. 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
Oct. 23, 2021, 4 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 27.0
 
Oct. 23, 2021, 3 p.m. 4.0 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (23) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
Oct. 23, 2021, 2 p.m. 5.6 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (15) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 23, 2021, 1 p.m. 4.5 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 23, 2021, noon 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (20) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
Oct. 23, 2021, 11 a.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Oct. 23, 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
 
Oct. 23, 2021, 9 a.m. 3.7 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 23, 2021, 8 a.m. 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Oct. 23, 2021, 7 a.m. 3.0 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
Oct. 23, 2021, 6 a.m. 3.8 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (25) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 23, 2021, 5 a.m. 4.8 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (25) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 23, 2021, 4 a.m. 4.7 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (26) 0.27 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 23, 2021, 3 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
Oct. 23, 2021, 2 a.m. 3.2 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
Oct. 23, 2021, 1 a.m. 2.6 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Oct. 23, 2021, midnight 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
Oct. 22, 2021, 11 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Oct. 22, 2021, 10 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 34.0
 
Oct. 22, 2021, 9 p.m. 3.6 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 33.0
 
Oct. 22, 2021, 8 p.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Oct. 22, 2021, 7 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 34.0
 
Oct. 22, 2021, 6 p.m. 3.7 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Oct. 22, 2021, 5 p.m. 4.5 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.26 ppb (4) N/A 3.0 μg/m3 (13) 28.0
 
Oct. 22, 2021, 4 p.m. 4.1 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.27 ppb (4) N/A 2.0 μg/m3 (9) 27.0
 
Oct. 22, 2021, 3 p.m. 5.2 ppb (5) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (26) 0.26 ppb (4) N/A 3.0 μg/m3 (13) 26.0
 
Oct. 22, 2021, 2 p.m. 4.3 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.25 ppb (3) N/A 3.0 μg/m3 (13) 27.0
 
Oct. 22, 2021, 1 p.m. 1.7 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) 0.22 ppb (3) N/A 2.0 μg/m3 (9) 29.0
 
Oct. 22, 2021, noon 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (21) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 21.0
 
Oct. 22, 2021, 11 a.m. 1.3 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (21) 0.19 ppb (3) N/A 0.0 μg/m3 (0) 21.0
 
Oct. 22, 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
 
Oct. 22, 2021, 9 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 19.0
 
Oct. 22, 2021, 8 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 19.0
 
Oct. 22, 2021, 7 a.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (20) 0.2 ppb (3) N/A 2.0 μg/m3 (9) 20.0
 
Oct. 22, 2021, 6 a.m. 1.7 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) 0.21 ppb (3) N/A 2.0 μg/m3 (9) 19.0
 
Oct. 22, 2021, 5 a.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (17) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 17.0
 
Oct. 22, 2021, 4 a.m. 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (17) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 17.0
 
Oct. 22, 2021, 3 a.m. 3.4 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (16) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 16.0
 
Oct. 22, 2021, 2 a.m. 2.3 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (19) 0.22 ppb (3) N/A 2.0 μg/m3 (9) 19.0
 
Oct. 22, 2021, 1 a.m. 2.2 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (20) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
Oct. 22, 2021, midnight 2.5 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (20) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
Oct. 21, 2021, 11 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (19) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
Oct. 21, 2021, 10 p.m. 7.5 ppb (8) 1.4 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (18) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 21, 2021, 9 p.m. 7.5 ppb (8) 1.3 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (19) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 21, 2021, 8 p.m. 2.8 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Oct. 21, 2021, 7 p.m. 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
Oct. 21, 2021, 6 p.m. 7.2 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (17) 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 21, 2021, 5 p.m. 13.7 ppb (13) 4.6 ppb (5) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 10.0 ppb (10) 0.41 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 21, 2021, 4 p.m. 11.9 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 9.0 ppb (9) 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 21, 2021, 3 p.m. 77.3 ppb (76) 38.6 ppb (37) N/A 39.0 ppb (37) N/A 40.0 ppb (57) 2.0 ppb (2) 4.14 ppb (47) N/A 13.0 μg/m3 (53) 76.0
 
Oct. 21, 2021, 2 p.m. 11.1 ppb (11) 1.4 ppb (2) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 4.0 ppb (4) 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 21, 2021, 1 p.m. 10.9 ppb (11) 1.1 ppb (2) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (6) 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 21, 2021, noon 8.2 ppb (8) 1.1 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 8.0 ppb (8) 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 21, 2021, 11 a.m. 8.7 ppb (9) 1.1 ppb (2) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 8.0 ppb (8) 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
Oct. 21, 2021, 9 a.m. 7.6 ppb (8) 1.1 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 10.0 ppb (10) 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 21, 2021, 8 a.m. 7.3 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 12.0 ppb (12) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 21, 2021, 7 a.m. 7.2 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (13) 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 21, 2021, 6 a.m. 7.1 ppb (7) 1.1 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (13) 0.31 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 21, 2021, 5 a.m. 7.5 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 21, 2021, 4 a.m. 7.4 ppb (7) 1.1 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 21, 2021, 3 a.m. 6.8 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (13) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 21, 2021, 2 a.m. 5.8 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 17.0 ppb (16) 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 21, 2021, 1 a.m. 6.5 ppb (7) 1.1 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (18) 0.29 ppb (4) N/A 4.0 μg/m3 (17) 18.0
 
Oct. 21, 2021, midnight 4.3 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.26 ppb (4) N/A 3.0 μg/m3 (13) 24.0
 
Oct. 20, 2021, 11 p.m. 2.9 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 1.0 μg/m3 (5) 26.0
 
Oct. 20, 2021, 10 p.m. 3.8 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.25 ppb (3) N/A 1.0 μg/m3 (5) 26.0
 
Oct. 20, 2021, 9 p.m. 3.3 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 27.0
 
Oct. 20, 2021, 8 p.m. 2.9 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 27.0
 
Oct. 20, 2021, 7 p.m. 3.0 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
Oct. 20, 2021, 6 p.m. 8.6 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (21) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 20, 2021, 5 p.m. 9.0 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (19) 0.34 ppb (4) N/A 3.0 μg/m3 (13) 19.0
 
Oct. 20, 2021, 4 p.m. 7.5 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (20) 0.29 ppb (4) N/A 4.0 μg/m3 (17) 20.0
 
Oct. 20, 2021, 3 p.m. 9.7 ppb (10) 1.3 ppb (2) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (18) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 20, 2021, 2 p.m. 8.6 ppb (9) 1.2 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (19) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 20, 2021, 1 p.m. 3.2 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Oct. 20, 2021, noon 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) 0.21 ppb (3) N/A 1.0 μg/m3 (5) 29.0
 
Oct. 20, 2021, 11 a.m. 1.9 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 31.0
 
Oct. 20, 2021, 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
 
Oct. 20, 2021, 9 a.m. 1.7 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Oct. 20, 2021, 8 a.m. 1.6 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 33.0
 
Oct. 20, 2021, 7 a.m. 1.7 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 34.0
 
Oct. 20, 2021, 6 a.m. 2.1 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
Oct. 20, 2021, 5 a.m. 2.4 ppb (3) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.2 ppb (3) N/A 2.0 μg/m3 (9) 35.0
 
Oct. 20, 2021, 4 a.m. 3.7 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 33.0
 
Oct. 20, 2021, 3 a.m. 4.0 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
Oct. 20, 2021, 2 a.m. 5.0 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
Oct. 20, 2021, 1 a.m. 6.6 ppb (7) 1.1 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (31) 0.26 ppb (4) N/A 3.0 μg/m3 (13) 31.0
 
Oct. 20, 2021, midnight 5.3 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
Oct. 19, 2021, 11 p.m. 3.3 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 39.0
 
Oct. 19, 2021, 10 p.m. 2.9 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 38.0
 
Oct. 19, 2021, 9 p.m. 3.2 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 38.0
 
Oct. 19, 2021, 8 p.m. 5.4 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (34) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 34.0
 
Oct. 19, 2021, 7 p.m. 5.5 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.29 ppb (4) N/A 5.0 μg/m3 (21) 31.0
 
Oct. 19, 2021, 6 p.m. 8.3 ppb (8) 2.5 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 26.0 ppb (25) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 19, 2021, 5 p.m. 14.7 ppb (14) 5.2 ppb (5) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 18.0 ppb (17) 0.42 ppb (5) N/A N/A 17.0
 
Oct. 19, 2021, 4 p.m. 18.3 ppb (18) 7.4 ppb (7) N/A 11.0 ppb (11) N/A 1.0 ppb (2) 11.0 ppb (11) 0.44 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 19, 2021, 3 p.m. 28.8 ppb (28) 15.6 ppb (15) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 3.0 ppb (3) 0.51 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 19, 2021, 2 p.m. 26.4 ppb (25) 13.0 ppb (13) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) 0.46 ppb (6) N/A 4.0 μg/m3 (17) 25.0
 
Oct. 19, 2021, 1 p.m. 18.5 ppb (18) 6.5 ppb (7) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.32 ppb (4) N/A 3.0 μg/m3 (13) 18.0
 
Oct. 19, 2021, noon 12.3 ppb (12) 2.9 ppb (3) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 19, 2021, 11 a.m. 9.4 ppb (9) 1.4 ppb (2) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 2.0 ppb (2) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 19, 2021, 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
 
Oct. 19, 2021, 9 a.m. 8.4 ppb (8) 1.2 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 7.0 ppb (7) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 19, 2021, 8 a.m. 7.2 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (9) 0.25 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 19, 2021, 7 a.m. 6.9 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 12.0 ppb (12) 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 19, 2021, 6 a.m. 7.7 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 12.0 ppb (12) 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 19, 2021, 5 a.m. 7.3 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 19, 2021, 4 a.m. 8.8 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 14.0 ppb (13) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 19, 2021, 3 a.m. 8.1 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 22.0 ppb (21) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 19, 2021, 2 a.m. 7.5 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (24) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
Oct. 19, 2021, 1 a.m. 6.1 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (26) 0.26 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
Oct. 19, 2021, midnight 4.8 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Oct. 18, 2021, 11 p.m. 2.5 ppb (3) 1.1 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
Oct. 18, 2021, 10 p.m. 2.7 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.21 ppb (3) N/A 6.0 μg/m3 (25) 34.0
 
Oct. 18, 2021, 9 p.m. 2.6 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 33.0
 
Oct. 18, 2021, 8 p.m. 2.9 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Oct. 18, 2021, 7 p.m. 2.8 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Oct. 18, 2021, 6 p.m. 2.6 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 31.0
 
Oct. 18, 2021, 5 p.m. 3.4 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Oct. 18, 2021, 4 p.m. 5.0 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 18, 2021, 3 p.m. 8.0 ppb (8) 2.3 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (24) 0.3 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
Oct. 18, 2021, 2 p.m. 11.0 ppb (11) 1.7 ppb (2) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 18.0 ppb (17) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 17.0
 
Oct. 18, 2021, 1 p.m. 9.7 ppb (10) 1.2 ppb (2) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 22.0 ppb (21) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
Oct. 18, 2021, noon 3.7 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
Oct. 18, 2021, 11 a.m. 2.3 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Oct. 18, 2021, 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
 
Oct. 18, 2021, 9 a.m. 2.7 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) N/A 6.0 μg/m3 (25) 29.0