ID: 213

AQSQID: 060811001

Site Name: Redwood City

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

Updated: Sept. 20, 2021, 12:01 a.m.

Location: Redwood City (Ampex), CA

Reporting: True, Located: True

Current AQI: 35.0

Redwood City (Ampex) CA, US: 37.4828, -122.2022

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 19, 2021, 10 p.m. 1.2 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 35.0
 
Sept. 19, 2021, 9 p.m. 1.2 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.22 ppb (3) N/A 8.0 μg/m3 (34) 35.0
 
Sept. 19, 2021, 8 p.m. 1.4 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
Sept. 19, 2021, 7 p.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 36.0
 
Sept. 19, 2021, 6 p.m. 3.6 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 35.0
 
Sept. 19, 2021, 5 p.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 33.0
 
Sept. 19, 2021, 4 p.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 31.0
 
Sept. 19, 2021, 3 p.m. 2.0 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 31.0
 
Sept. 19, 2021, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.23 ppb (3) N/A -1.0 μg/m3 (0) 30.0
 
Sept. 19, 2021, 1 p.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.23 ppb (3) N/A -2.0 μg/m3 (0) 31.0
 
Sept. 19, 2021, noon 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (29) 0.23 ppb (3) N/A -1.0 μg/m3 (0) 29.0
 
Sept. 19, 2021, 11 a.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) 0.22 ppb (3) N/A -2.0 μg/m3 (0) 22.0
 
Sept. 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 (0) 0.0
Sept. 19, 2021, 9 a.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (18) 0.23 ppb (3) N/A -2.0 μg/m3 (0) 18.0
 
Sept. 19, 2021, 8 a.m. 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (19) 0.21 ppb (3) N/A 1.0 μg/m3 (5) 19.0
 
Sept. 19, 2021, 7 a.m. 0.7 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (19) 0.21 ppb (3) N/A -2.0 μg/m3 (0) 19.0
 
Sept. 19, 2021, 6 a.m. 1.6 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (19) 0.2 ppb (3) N/A -1.0 μg/m3 (0) 19.0
 
Sept. 19, 2021, 5 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (16) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 16.0
 
Sept. 19, 2021, 4 a.m. 3.4 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 17.0 ppb (16) 0.27 ppb (4) N/A 2.0 μg/m3 (9) 16.0
 
Sept. 19, 2021, 3 a.m. 2.6 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (18) 0.25 ppb (3) N/A 0.0 μg/m3 (0) 18.0
 
Sept. 19, 2021, 2 a.m. 2.5 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (19) 0.25 ppb (3) N/A 0.0 μg/m3 (0) 19.0
 
Sept. 19, 2021, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (21) 0.2 ppb (3) N/A -1.0 μg/m3 (0) 21.0
 
Sept. 19, 2021, midnight 1.1 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (21) 0.21 ppb (3) N/A -2.0 μg/m3 (0) 21.0
 
Sept. 18, 2021, 11 p.m. 1.0 ppb (1) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (21) 0.21 ppb (3) N/A 0.0 μg/m3 (0) 21.0
 
Sept. 18, 2021, 10 p.m. 1.1 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) 0.21 ppb (3) N/A 0.0 μg/m3 (0) 22.0
 
Sept. 18, 2021, 9 p.m. 1.1 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) 0.2 ppb (3) N/A 0.0 μg/m3 (0) 22.0
 
Sept. 18, 2021, 8 p.m. 1.7 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) 0.22 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
Sept. 18, 2021, 7 p.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Sept. 18, 2021, 6 p.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 5 p.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 4 p.m. 3.4 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) 0.26 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2021, 3 p.m. 4.1 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 2 p.m. 7.1 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) 0.31 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2021, 1 p.m. 5.7 ppb (6) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (15) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, noon 3.6 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (17) 0.26 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 11 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
 
Sept. 18, 2021, 10 a.m. 7.0 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 15.0 ppb (14) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 18, 2021, 9 a.m. 6.7 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A N/A 17.0 ppb (16) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, 8 a.m. 4.9 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (22) 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, 7 a.m. 1.9 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2021, 6 a.m. 1.4 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 5 a.m. 1.4 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 4 a.m. 1.8 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Sept. 18, 2021, 3 a.m. 1.8 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2021, 2 a.m. 2.5 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.25 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 1 a.m. 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, midnight 4.3 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) 0.32 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 17, 2021, 11 p.m. 3.2 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) 0.3 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, 10 p.m. 3.2 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 17, 2021, 9 p.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2021, 8 p.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 7 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 6 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 5 p.m. 6.2 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 22.0 ppb (21) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 4 p.m. 6.0 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (17) 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 3 p.m. 6.7 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (15) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 2 p.m. 8.5 ppb (9) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (13) 0.3 ppb (4) N/A 2.0 μg/m3 (9) 13.0
 
Sept. 17, 2021, 1 p.m. 5.3 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 17.0 ppb (16) 0.27 ppb (4) N/A 0.0 μg/m3 (0) 16.0
 
Sept. 17, 2021, noon 2.5 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (19) 0.26 ppb (4) N/A 2.0 μg/m3 (9) 19.0
 
Sept. 17, 2021, 11 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
 
Sept. 17, 2021, 10 a.m. 1.0 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (20) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 20.0
 
Sept. 17, 2021, 9 a.m. 1.1 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (21) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 8 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
Sept. 17, 2021, 7 a.m. 2.6 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (21) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 17, 2021, 6 a.m. 2.9 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (21) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 5 a.m. 3.2 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (22) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
Sept. 17, 2021, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2021, 3 a.m. 4.7 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (23) 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 2 a.m. 5.2 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (24) 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 1 a.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, midnight 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 11 p.m. 3.6 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.28 ppb (4) N/A 7.0 μg/m3 (30) 31.0
 
Sept. 16, 2021, 10 p.m. 3.5 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.26 ppb (4) N/A 5.0 μg/m3 (21) 34.0
 
Sept. 16, 2021, 9 p.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 37.0
 
Sept. 16, 2021, 8 p.m. 3.3 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.26 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 7 p.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.26 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 16, 2021, 6 p.m. 5.4 ppb (6) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.28 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 5 p.m. 6.6 ppb (7) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 4 p.m. 6.0 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.28 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 16, 2021, 3 p.m. 7.1 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (21) 0.3 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2021, 2 p.m. 11.1 ppb (11) 2.9 ppb (3) N/A 8.0 ppb (8) N/A N/A 19.0 ppb (18) 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 1 p.m. 4.5 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (22) 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, noon 2.2 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (24) 0.25 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 10 a.m. 2.0 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, 9 a.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 16, 2021, 8 a.m. 1.9 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.26 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 16, 2021, 7 a.m. 3.9 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.27 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 16, 2021, 6 a.m. 6.5 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 5 a.m. 8.3 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 24.0 ppb (23) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 16, 2021, 4 a.m. 4.4 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (27) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 3 a.m. 6.9 ppb (7) 0.1 ppb (1) N/A 7.0 ppb (7) N/A N/A 29.0 ppb (27) 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, 2 a.m. 6.7 ppb (7) 0.2 ppb (1) N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 1 a.m. 3.8 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (35) 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 16, 2021, midnight 4.0 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 15, 2021, 11 p.m. 4.5 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.28 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 10 p.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.3 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 9 p.m. 5.4 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (40) 0.3 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 15, 2021, 8 p.m. 6.0 ppb (6) 1.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 23.0 μg/m3 (74) 74.0
 
Sept. 15, 2021, 7 p.m. 5.2 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.3 ppb (4) N/A 22.0 μg/m3 (72) 72.0
 
Sept. 15, 2021, 6 p.m. 6.1 ppb (6) 1.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) 0.29 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 5 p.m. 6.0 ppb (6) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) 0.3 ppb (4) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 15, 2021, 4 p.m. 11.0 ppb (11) 2.8 ppb (3) N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) 0.34 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 15, 2021, 3 p.m. 8.8 ppb (9) 1.1 ppb (2) N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) 0.33 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 15, 2021, 2 p.m. 11.1 ppb (11) 2.6 ppb (3) N/A 9.0 ppb (9) N/A N/A 16.0 ppb (15) 0.33 ppb (4) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 15, 2021, 1 p.m. 5.1 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 20.0 ppb (19) 0.29 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 15, 2021, noon 5.2 ppb (5) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (18) 0.29 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 10 a.m. 3.8 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) 0.29 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 9 a.m. 4.3 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (23) 0.28 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 8 a.m. 4.4 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (23) 0.28 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 7 a.m. 4.2 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 15, 2021, 6 a.m. 7.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 16.0 ppb (15) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 15, 2021, 5 a.m. 6.4 ppb (7) 0.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 15, 2021, 4 a.m. 3.4 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 15, 2021, 3 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (25) 0.29 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 2 a.m. 3.6 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 0.28 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 15, 2021, 1 a.m. 3.9 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, midnight 4.7 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.3 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 14, 2021, 11 p.m. 5.9 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (33) 0.3 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 14, 2021, 10 p.m. 5.7 ppb (6) 1.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.3 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2021, 9 p.m. 5.8 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 8 p.m. 8.3 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A 32.0 ppb (30) 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 14, 2021, 7 p.m. 12.0 ppb (12) 3.5 ppb (4) N/A 9.0 ppb (9) N/A N/A 26.0 ppb (25) 0.34 ppb (4) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 14, 2021, 6 p.m. 11.5 ppb (11) 3.7 ppb (4) N/A 8.0 ppb (8) N/A N/A 23.0 ppb (22) 0.34 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 14, 2021, 5 p.m. 12.7 ppb (12) 4.5 ppb (5) N/A 8.0 ppb (8) N/A N/A 20.0 ppb (19) 0.34 ppb (4) N/A 19.0 μg/m3 (66) 66.0
 
Sept. 14, 2021, 4 p.m. 14.7 ppb (14) 5.5 ppb (6) N/A 9.0 ppb (9) N/A N/A 17.0 ppb (16) 0.36 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 14, 2021, 3 p.m. 38.2 ppb (37) 23.3 ppb (22) N/A 15.0 ppb (15) N/A N/A 8.0 ppb (8) 0.52 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 14, 2021, 2 p.m. 41.7 ppb (40) 25.2 ppb (24) N/A 17.0 ppb (17) N/A N/A 2.0 ppb (2) 0.57 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 1 p.m. 19.6 ppb (19) 6.4 ppb (7) N/A 13.0 ppb (13) N/A N/A 2.0 ppb (2) 0.39 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2021, noon 9.3 ppb (9) 0.3 ppb (1) N/A 9.0 ppb (9) N/A N/A 7.0 ppb (7) 0.3 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 11 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
 
Sept. 14, 2021, 10 a.m. 6.3 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (7) N/A N/A 11.0 ppb (11) 0.27 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 9 a.m. 8.2 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 7.0 ppb (7) 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, 8 a.m. 13.9 ppb (14) 0.9 ppb (1) N/A 13.0 ppb (13) N/A N/A 3.0 ppb (3) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, 7 a.m. 14.2 ppb (14) 1.2 ppb (2) N/A 13.0 ppb (13) N/A N/A 6.0 ppb (6) 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 6 a.m. 6.4 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 19.0 ppb (18) 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 5 a.m. 9.5 ppb (9) 0.1 ppb (1) N/A 10.0 ppb (10) N/A N/A 17.0 ppb (16) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, 4 a.m. 10.6 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (11) N/A N/A 16.0 ppb (15) 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2021, 3 a.m. 12.4 ppb (12) 0.3 ppb (1) N/A 12.0 ppb (12) N/A N/A 16.0 ppb (15) 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 2 a.m. 5.4 ppb (6) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (23) 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2021, 1 a.m. 4.6 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.28 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 14, 2021, midnight 5.9 ppb (6) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (25) 0.29 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 13, 2021, 11 p.m. 5.3 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 13, 2021, 10 p.m. 6.0 ppb (6) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.27 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 13, 2021, 9 p.m. 4.7 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.28 ppb (4) N/A 21.0 μg/m3 (70) 70.0
 
Sept. 13, 2021, 8 p.m. 5.8 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.28 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 13, 2021, 7 p.m. 8.7 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.32 ppb (4) N/A 24.0 μg/m3 (77) 77.0
 
Sept. 13, 2021, 6 p.m. 8.4 ppb (8) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (26) 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2021, 5 p.m. 10.5 ppb (10) 3.3 ppb (4) N/A 7.0 ppb (7) N/A N/A 22.0 ppb (21) 0.32 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 13, 2021, 4 p.m. 14.0 ppb (14) 5.0 ppb (5) N/A 9.0 ppb (9) N/A N/A 18.0 ppb (17) 0.35 ppb (4) N/A N/A 17.0
 
Sept. 13, 2021, 3 p.m. 27.4 ppb (26) 13.9 ppb (14) N/A 14.0 ppb (14) N/A N/A 10.0 ppb (10) 0.57 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 13, 2021, 2 p.m. 71.3 ppb (70) 53.5 ppb (51) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) 0.84 ppb (10) N/A 8.0 μg/m3 (34) 70.0
 
Sept. 13, 2021, 1 p.m. 28.3 ppb (27) 16.3 ppb (16) N/A 12.0 ppb (12) N/A N/A 0.0 ppb (0) 0.46 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
Sept. 13, 2021, noon 12.3 ppb (12) 2.6 ppb (3) N/A 10.0 ppb (10) N/A N/A 3.0 ppb (3) 0.38 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2021, 11 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. 13, 2021, 10 a.m. 7.9 ppb (8) 0.1 ppb (1) N/A 8.0 ppb (8) N/A N/A 4.0 ppb (4) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2021, 9 a.m. 10.3 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (10) N/A N/A 2.0 ppb (2) 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 13, 2021, 8 a.m. 11.2 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (11) N/A N/A 2.0 ppb (2) 0.37 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2021, 7 a.m. 14.0 ppb (14) 0.0 ppb (0) N/A 14.0 ppb (14) N/A N/A 7.0 ppb (7) 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 13, 2021, 6 a.m. 12.8 ppb (13) 0.1 ppb (1) N/A 13.0 ppb (13) N/A N/A 9.0 ppb (9) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 13, 2021, 5 a.m. 5.4 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 20.0 ppb (19) 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2021, 4 a.m. 5.2 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (18) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2021, 3 a.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (20) 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 13, 2021, 2 a.m. 4.2 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 13, 2021, 1 a.m. 6.4 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 13, 2021, midnight 9.6 ppb (10) 2.1 ppb (2) N/A 8.0 ppb (8) N/A N/A 24.0 ppb (23) 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 12, 2021, 11 p.m. 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 0.28 ppb (4) N/A 16.0 μg/m3 (60) 60.0