AQSQID: 500070007

Site Name: Underhill

Location: Chittenden Co, VT

Reporting: True, Located: True

Current AQI: 28.0

Chittenden Co VT, US: 44.528389, -72.868973

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 24, 2019, noon N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.6 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.08 ppb (1) N/A 0.3 μg/m3 (1) 28.0
 
Jan. 24, 2019, 11 a.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.08 ppb (1) N/A 0.3 μg/m3 (1) 28.0
 
Jan. 24, 2019, 10 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.08 ppb (1) N/A 0.5 μg/m3 (2) 28.0
 
Jan. 24, 2019, 9 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.09 ppb (1) N/A 0.9 μg/m3 (4) 28.0
 
Jan. 24, 2019, 8 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 37.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
Jan. 24, 2019, 7 a.m. N/A 0.1 ppb (0) 2.0 ppb (2) N/A 1.9 ppb (2) N/A 37.0 ppb (28) 0.09 ppb (1) N/A 1.0 μg/m3 (4) 28.0
 
Jan. 24, 2019, 6 a.m. N/A 0.0 ppb (0) 1.9 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) N/A 0.09 ppb (1) N/A 1.3 μg/m3 (5) 5.0
 
Jan. 24, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 1.3 μg/m3 (5) 28.0
 
Jan. 24, 2019, 4 a.m. N/A 0.1 ppb (0) 3.5 ppb (3) N/A 3.4 ppb (3) 0.0 ppb (0) 35.0 ppb (27) 0.08 ppb (1) N/A 1.7 μg/m3 (7) 27.0
 
Jan. 24, 2019, 3 a.m. N/A 0.1 ppb (0) 3.8 ppb (4) N/A 3.7 ppb (3) 0.0 ppb (0) 35.0 ppb (27) 0.09 ppb (1) N/A 2.6 μg/m3 (11) 27.0
 
Jan. 24, 2019, 2 a.m. N/A 0.1 ppb (0) 4.0 ppb (4) N/A 3.9 ppb (4) 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 26.0
 
Jan. 24, 2019, 1 a.m. N/A 0.1 ppb (0) 4.2 ppb (4) N/A 4.1 ppb (4) 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 26.0
 
Jan. 24, 2019, midnight N/A 0.2 ppb (0) 4.4 ppb (4) N/A 4.3 ppb (4) 0.0 ppb (0) 35.0 ppb (27) 0.09 ppb (1) N/A 4.2 μg/m3 (18) 27.0
 
Jan. 23, 2019, 11 p.m. N/A 0.2 ppb (0) 4.6 ppb (4) N/A 4.5 ppb (4) 0.0 ppb (0) 35.0 ppb (27) 0.09 ppb (1) N/A 5.1 μg/m3 (21) 27.0
 
Jan. 23, 2019, 10 p.m. N/A 0.2 ppb (0) 4.8 ppb (4) N/A 4.6 ppb (4) 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 23, 2019, 9 p.m. N/A 0.2 ppb (0) 4.8 ppb (4) N/A 4.7 ppb (4) 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 5.1 μg/m3 (21) 28.0
 
Jan. 23, 2019, 8 p.m. N/A 0.2 ppb (0) 4.9 ppb (5) N/A 4.7 ppb (4) 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 5.4 μg/m3 (23) 28.0
 
Jan. 23, 2019, 7 p.m. N/A 0.2 ppb (0) 4.8 ppb (4) N/A 4.6 ppb (4) 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 5.7 μg/m3 (24) 28.0
 
Jan. 23, 2019, 6 p.m. N/A 0.2 ppb (0) 4.7 ppb (4) N/A 4.5 ppb (4) 0.0 ppb (0) 37.0 ppb (28) 0.09 ppb (1) N/A 5.3 μg/m3 (22) 28.0
 
Jan. 23, 2019, 5 p.m. N/A 0.2 ppb (0) 4.8 ppb (4) N/A 4.6 ppb (4) 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 5.1 μg/m3 (21) 28.0
 
Jan. 23, 2019, 4 p.m. N/A 0.2 ppb (0) 4.5 ppb (4) N/A 4.3 ppb (4) 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 28.0
 
Jan. 23, 2019, 3 p.m. N/A 0.1 ppb (0) 4.3 ppb (4) N/A 4.1 ppb (4) 0.0 ppb (0) 37.0 ppb (28) 0.09 ppb (1) N/A 4.7 μg/m3 (20) 28.0
 
Jan. 23, 2019, 2 p.m. N/A 0.1 ppb (0) 3.4 ppb (3) N/A 3.3 ppb (3) 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 4.2 μg/m3 (18) 28.0
 
Jan. 23, 2019, 1 p.m. N/A 0.1 ppb (0) 2.2 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 29.0
 
Jan. 23, 2019, noon N/A 0.0 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.09 ppb (1) N/A 3.2 μg/m3 (13) 30.0
 
Jan. 23, 2019, 11 a.m. N/A 0.0 ppb (0) 1.1 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.09 ppb (1) N/A 2.8 μg/m3 (12) 32.0
 
Jan. 23, 2019, 10 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 42.0 ppb (32) 0.07 ppb (1) N/A 2.4 μg/m3 (10) 32.0
 
Jan. 23, 2019, 9 a.m. N/A 0.1 ppb (0) 0.5 ppb (0) N/A 0.5 ppb (0) 0.0 ppb (0) 44.0 ppb (34) 0.08 ppb (1) N/A 1.7 μg/m3 (7) 34.0
 
Jan. 23, 2019, 8 a.m. N/A 0.1 ppb (0) 0.5 ppb (0) N/A 0.4 ppb (0) 0.0 ppb (0) 45.0 ppb (35) N/A N/A 1.1 μg/m3 (5) 35.0
 
Jan. 23, 2019, 7 a.m. N/A 0.1 ppb (0) 0.5 ppb (0) N/A 0.3 ppb (0) N/A 45.0 ppb (35) 0.08 ppb (1) N/A 0.9 μg/m3 (4) 35.0
 
Jan. 23, 2019, 6 a.m. N/A 0.1 ppb (0) 0.4 ppb (0) N/A 0.3 ppb (0) 0.0 ppb (0) N/A 0.08 ppb (1) N/A 1.2 μg/m3 (5) 5.0
 
Jan. 23, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 32.0
 
Jan. 23, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.09 ppb (1) N/A 1.8 μg/m3 (8) 33.0
 
Jan. 23, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.09 ppb (1) N/A 1.0 μg/m3 (4) 34.0
 
Jan. 23, 2019, 2 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) N/A 42.0 ppb (32) 0.08 ppb (1) N/A 0.8 μg/m3 (3) 32.0
 
Jan. 23, 2019, 1 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 41.0 ppb (32) N/A N/A 1.0 μg/m3 (4) 32.0
 
Jan. 23, 2019, midnight N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) N/A 0.09 ppb (1) N/A 1.0 μg/m3 (4) 4.0
 
Jan. 22, 2019, 11 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 1.2 μg/m3 (5) 32.0
 
Jan. 22, 2019, 10 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 1.3 μg/m3 (5) 32.0
 
Jan. 22, 2019, 9 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.11 ppb (1) N/A 1.6 μg/m3 (7) 32.0
 
Jan. 22, 2019, 8 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 42.0 ppb (32) 0.12 ppb (1) N/A 2.1 μg/m3 (9) 32.0
 
Jan. 22, 2019, 7 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) N/A 3.0 μg/m3 (12) 32.0
 
Jan. 22, 2019, 6 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 3.5 μg/m3 (15) 31.0
 
Jan. 22, 2019, 5 p.m. N/A 0.1 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 3.1 μg/m3 (13) 31.0
 
Jan. 22, 2019, 4 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.11 ppb (1) N/A 2.3 μg/m3 (10) 32.0
 
Jan. 22, 2019, 3 p.m. N/A 0.1 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 2.6 μg/m3 (11) 31.0
 
Jan. 22, 2019, 2 p.m. N/A 0.1 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 3.4 μg/m3 (14) 31.0
 
Jan. 22, 2019, 1 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.12 ppb (1) N/A 2.9 μg/m3 (12) 30.0
 
Jan. 22, 2019, noon N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.11 ppb (1) N/A 2.7 μg/m3 (11) 30.0
 
Jan. 22, 2019, 11 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 2.7 μg/m3 (11) 29.0
 
Jan. 22, 2019, 10 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 2.7 μg/m3 (11) 29.0
 
Jan. 22, 2019, 9 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 29.0
 
Jan. 22, 2019, 8 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 38.0 ppb (29) N/A N/A 3.1 μg/m3 (13) 29.0
 
Jan. 22, 2019, 7 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) N/A 38.0 ppb (29) 0.11 ppb (1) N/A 3.1 μg/m3 (13) 29.0
 
Jan. 22, 2019, 6 a.m. N/A 0.1 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) N/A 0.11 ppb (1) N/A 3.1 μg/m3 (13) 13.0
 
Jan. 22, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.11 ppb (1) N/A 3.1 μg/m3 (13) 30.0
 
Jan. 22, 2019, 4 a.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 30.0
 
Jan. 22, 2019, 3 a.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 30.0
 
Jan. 22, 2019, 2 a.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.11 ppb (1) N/A 3.0 μg/m3 (12) 30.0
 
Jan. 22, 2019, 1 a.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 3.2 μg/m3 (13) 29.0
 
Jan. 22, 2019, midnight N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 3.1 μg/m3 (13) 29.0
 
Jan. 21, 2019, 11 p.m. N/A 0.1 ppb (0) 1.2 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 3.2 μg/m3 (13) 29.0
 
Jan. 21, 2019, 10 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) N/A 3.1 μg/m3 (13) 29.0
 
Jan. 21, 2019, 9 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) N/A 3.1 μg/m3 (13) 29.0
 
Jan. 21, 2019, 8 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) N/A 3.2 μg/m3 (13) 29.0
 
Jan. 21, 2019, 7 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 3.3 μg/m3 (14) 29.0
 
Jan. 21, 2019, 6 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 3.3 μg/m3 (14) 29.0
 
Jan. 21, 2019, 5 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 37.0 ppb (28) 0.11 ppb (1) N/A 3.4 μg/m3 (14) 28.0
 
Jan. 21, 2019, 4 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 37.0 ppb (28) 0.11 ppb (1) N/A 3.4 μg/m3 (14) 28.0
 
Jan. 21, 2019, 3 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) N/A 3.3 μg/m3 (14) 28.0
 
Jan. 21, 2019, 2 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 3.4 μg/m3 (14) 27.0
 
Jan. 21, 2019, 1 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 3.4 μg/m3 (14) 26.0
 
Jan. 21, 2019, noon N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 3.3 μg/m3 (14) 26.0
 
Jan. 21, 2019, 11 a.m. N/A 0.1 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 3.5 μg/m3 (15) 26.0
 
Jan. 21, 2019, 10 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 3.3 μg/m3 (14) 26.0
 
Jan. 21, 2019, 9 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) N/A 3.3 μg/m3 (14) 26.0
 
Jan. 21, 2019, 8 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (26) N/A N/A 3.3 μg/m3 (14) 26.0
 
Jan. 21, 2019, 7 a.m. N/A 0.2 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) N/A 33.0 ppb (25) 0.13 ppb (1) N/A 3.4 μg/m3 (14) 25.0
 
Jan. 21, 2019, 6 a.m. N/A 0.2 ppb (0) 1.4 ppb (1) N/A 1.2 ppb (1) 0.0 ppb (0) N/A 0.13 ppb (1) N/A 3.7 μg/m3 (15) 15.0
 
Jan. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.14 ppb (2) N/A 4.9 μg/m3 (20) 25.0
 
Jan. 21, 2019, 4 a.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.5 ppb (2) 1.0 ppb (1) 32.0 ppb (25) 0.15 ppb (2) N/A 5.1 μg/m3 (21) 25.0
 
Jan. 21, 2019, 3 a.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 1.0 ppb (1) 32.0 ppb (25) 0.15 ppb (2) N/A 4.7 μg/m3 (20) 25.0
 
Jan. 21, 2019, 2 a.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) N/A 4.6 μg/m3 (19) 25.0
 
Jan. 21, 2019, 1 a.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 4.6 μg/m3 (19) 25.0
 
Jan. 21, 2019, midnight N/A 0.1 ppb (0) 2.6 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) N/A 4.8 μg/m3 (20) 25.0
 
Jan. 20, 2019, 11 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 20, 2019, 10 p.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) N/A 4.4 μg/m3 (18) 25.0
 
Jan. 20, 2019, 9 p.m. N/A 0.2 ppb (0) 1.9 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 20, 2019, 8 p.m. N/A 0.2 ppb (0) 2.1 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 3.9 μg/m3 (16) 27.0
 
Jan. 20, 2019, 7 p.m. N/A 0.3 ppb (0) 2.6 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 4.1 μg/m3 (17) 27.0
 
Jan. 20, 2019, 6 p.m. N/A 0.3 ppb (0) 4.9 ppb (5) N/A 4.6 ppb (4) 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) N/A 5.5 μg/m3 (23) 25.0
 
Jan. 20, 2019, 5 p.m. N/A 0.2 ppb (0) 5.9 ppb (5) N/A 5.7 ppb (5) 0.0 ppb (0) 25.0 ppb (19) 0.22 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
Jan. 20, 2019, 4 p.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A 5.1 μg/m3 (21) 25.0
 
Jan. 20, 2019, 3 p.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.6 ppb (1) 0.0 ppb (0) 37.0 ppb (28) 0.11 ppb (1) N/A 4.1 μg/m3 (17) 28.0
 
Jan. 20, 2019, 2 p.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 20, 2019, 1 p.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 3.8 μg/m3 (16) 28.0
 
Jan. 20, 2019, noon N/A 0.0 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 4.1 μg/m3 (17) 28.0
 
Jan. 20, 2019, 11 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.6 ppb (1) 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 20, 2019, 10 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) N/A 4.8 μg/m3 (20) 27.0
 
Jan. 20, 2019, 9 a.m. N/A 0.0 ppb (0) 1.4 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 5.2 μg/m3 (22) 27.0
 
Jan. 20, 2019, 8 a.m. N/A 0.0 ppb (0) 1.3 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 37.0 ppb (28) N/A N/A 2.1 μg/m3 (9) 28.0
 
Jan. 20, 2019, 7 a.m. N/A 0.1 ppb (0) 1.3 ppb (1) N/A 1.3 ppb (1) N/A 39.0 ppb (30) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 30.0
 
Jan. 20, 2019, 6 a.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) N/A 0.12 ppb (1) N/A 4.4 μg/m3 (18) 18.0
 
Jan. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A 6.6 μg/m3 (28) 28.0
 
Jan. 20, 2019, 4 a.m. N/A 0.0 ppb (0) 2.6 ppb (2) N/A 2.6 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Jan. 20, 2019, 3 a.m. N/A 0.1 ppb (0) 2.7 ppb (3) N/A 2.6 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 7.8 μg/m3 (32) 32.0
 
Jan. 20, 2019, 2 a.m. N/A 0.0 ppb (0) 2.6 ppb (2) N/A 2.6 ppb (2) 0.0 ppb (0) 31.0 ppb (24) 0.19 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
Jan. 20, 2019, 1 a.m. N/A 0.0 ppb (0) 2.5 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 8.6 μg/m3 (36) 36.0
 
Jan. 20, 2019, midnight N/A 0.0 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
Jan. 19, 2019, 11 p.m. N/A 0.0 ppb (0) 2.2 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) N/A 7.2 μg/m3 (30) 30.0
 
Jan. 19, 2019, 10 p.m. N/A 0.1 ppb (0) 2.0 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
Jan. 19, 2019, 9 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) N/A 5.5 μg/m3 (23) 26.0
 
Jan. 19, 2019, 8 p.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A 4.8 μg/m3 (20) 27.0
 
Jan. 19, 2019, 7 p.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 4.4 μg/m3 (18) 28.0
 
Jan. 19, 2019, 6 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 4.2 μg/m3 (18) 28.0
 
Jan. 19, 2019, 5 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 28.0
 
Jan. 19, 2019, 4 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 28.0
 
Jan. 19, 2019, 3 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) N/A 3.8 μg/m3 (16) 28.0
 
Jan. 19, 2019, 2 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 3.6 μg/m3 (15) 28.0
 
Jan. 19, 2019, 1 p.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 19, 2019, noon N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 38.0 ppb (29) 0.15 ppb (2) N/A 3.6 μg/m3 (15) 29.0
 
Jan. 19, 2019, 11 a.m. N/A 0.0 ppb (0) 2.0 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A 3.4 μg/m3 (14) 30.0
 
Jan. 19, 2019, 10 a.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) N/A 3.9 μg/m3 (16) 30.0
 
Jan. 19, 2019, 9 a.m. N/A 0.1 ppb (0) 3.0 ppb (3) N/A 3.0 ppb (3) 0.0 ppb (0) 40.0 ppb (31) 0.15 ppb (2) N/A 3.8 μg/m3 (16) 31.0
 
Jan. 19, 2019, 8 a.m. N/A 0.1 ppb (0) 3.4 ppb (3) N/A 3.4 ppb (3) 0.0 ppb (0) 36.0 ppb (28) N/A N/A 6.2 μg/m3 (26) 28.0
 
Jan. 19, 2019, 7 a.m. N/A 0.1 ppb (0) 3.2 ppb (3) N/A 3.1 ppb (3) N/A 37.0 ppb (28) 0.14 ppb (2) N/A 5.4 μg/m3 (23) 28.0
 
Jan. 19, 2019, 6 a.m. N/A 0.1 ppb (0) 6.7 ppb (6) N/A 6.5 ppb (6) 0.0 ppb (0) N/A 0.16 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
Jan. 19, 2019, 4 a.m. N/A 0.0 ppb (0) 2.2 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) N/A 5.5 μg/m3 (23) 28.0
 
Jan. 19, 2019, 3 a.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 4.2 μg/m3 (18) 29.0
 
Jan. 19, 2019, 2 a.m. N/A 0.0 ppb (0) 3.2 ppb (3) N/A 3.1 ppb (3) 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) N/A 4.8 μg/m3 (20) 29.0
 
Jan. 19, 2019, 1 a.m. N/A 0.0 ppb (0) 4.4 ppb (4) N/A 4.4 ppb (4) 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) N/A 7.8 μg/m3 (32) 32.0
 
Jan. 19, 2019, midnight N/A 0.1 ppb (0) 4.9 ppb (5) N/A 4.8 ppb (4) 0.0 ppb (0) 31.0 ppb (24) 0.13 ppb (1) N/A 8.2 μg/m3 (34) 34.0
 
Jan. 18, 2019, 11 p.m. N/A 0.1 ppb (0) 5.1 ppb (5) N/A 5.0 ppb (5) 0.0 ppb (0) 28.0 ppb (22) 0.13 ppb (1) N/A 6.9 μg/m3 (29) 29.0
 
Jan. 18, 2019, 10 p.m. N/A 0.1 ppb (0) 4.8 ppb (4) N/A 4.7 ppb (4) 0.0 ppb (0) 29.0 ppb (22) 0.12 ppb (1) N/A 7.2 μg/m3 (30) 30.0
 
Jan. 18, 2019, 9 p.m. N/A 0.1 ppb (0) 3.9 ppb (4) N/A 3.8 ppb (4) 0.0 ppb (0) 30.0 ppb (23) 0.11 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
Jan. 18, 2019, 8 p.m. N/A 0.1 ppb (0) 2.9 ppb (3) N/A 2.8 ppb (3) 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A 5.6 μg/m3 (23) 25.0
 
Jan. 18, 2019, 7 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 34.0 ppb (26) 0.09 ppb (1) N/A 4.8 μg/m3 (20) 26.0
 
Jan. 18, 2019, 6 p.m. N/A 0.0 ppb (0) 2.3 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 36.0 ppb (28) 0.08 ppb (1) N/A 4.1 μg/m3 (17) 28.0
 
Jan. 18, 2019, 5 p.m. N/A 0.0 ppb (0) 2.3 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.08 ppb (1) N/A 3.6 μg/m3 (15) 28.0
 
Jan. 18, 2019, 4 p.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.07 ppb (1) N/A 3.8 μg/m3 (16) 28.0
 
Jan. 18, 2019, 3 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.07 ppb (1) N/A 3.9 μg/m3 (16) 28.0
 
Jan. 18, 2019, 2 p.m. N/A 0.1 ppb (0) 2.7 ppb (3) N/A 2.6 ppb (2) 0.0 ppb (0) 37.0 ppb (28) 0.07 ppb (1) N/A 3.7 μg/m3 (15) 28.0
 
Jan. 18, 2019, 1 p.m. N/A 0.1 ppb (0) 2.9 ppb (3) N/A 2.8 ppb (3) 0.0 ppb (0) 38.0 ppb (29) 0.08 ppb (1) N/A 3.5 μg/m3 (15) 29.0
 
Jan. 18, 2019, noon N/A 0.1 ppb (0) 3.2 ppb (3) N/A 3.1 ppb (3) 0.0 ppb (0) 37.0 ppb (28) 0.08 ppb (1) N/A 3.6 μg/m3 (15) 28.0
 
Jan. 18, 2019, 11 a.m. N/A 0.1 ppb (0) 3.4 ppb (3) N/A 3.3 ppb (3) 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 18, 2019, 10 a.m. N/A 0.1 ppb (0) 4.7 ppb (4) N/A 4.6 ppb (4) 0.0 ppb (0) 35.0 ppb (27) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 27.0
 
Jan. 18, 2019, 9 a.m. N/A 0.0 ppb (0) 7.7 ppb (7) N/A 7.6 ppb (7) 0.0 ppb (0) 33.0 ppb (25) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 25.0
 
Jan. 18, 2019, 8 a.m. N/A 0.0 ppb (0) 8.6 ppb (8) N/A 8.5 ppb (8) 0.0 ppb (0) 31.0 ppb (24) N/A N/A 4.7 μg/m3 (20) 24.0
 
Jan. 18, 2019, 7 a.m. N/A 0.1 ppb (0) 2.8 ppb (3) N/A 2.8 ppb (3) N/A 35.0 ppb (27) 0.11 ppb (1) N/A 3.7 μg/m3 (15) 27.0
 
Jan. 18, 2019, 6 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) N/A 0.11 ppb (1) N/A 3.2 μg/m3 (13) 13.0
 
Jan. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 32.0
 
Jan. 18, 2019, 4 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 32.0
 
Jan. 18, 2019, 3 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.11 ppb (1) N/A 3.6 μg/m3 (15) 31.0
 
Jan. 18, 2019, 2 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.11 ppb (1) N/A 2.5 μg/m3 (10) 31.0
 
Jan. 18, 2019, 1 a.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.11 ppb (1) N/A 1.9 μg/m3 (8) 31.0
 
Jan. 18, 2019, midnight N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 2.2 μg/m3 (9) 31.0
 
Jan. 17, 2019, 11 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 3.1 μg/m3 (13) 31.0
 
Jan. 17, 2019, 10 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) N/A 4.6 μg/m3 (19) 31.0
 
Jan. 17, 2019, 9 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 3.3 μg/m3 (14) 31.0
 
Jan. 17, 2019, 8 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) N/A 2.8 μg/m3 (12) 32.0
 
Jan. 17, 2019, 7 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) N/A 3.2 μg/m3 (13) 32.0
 
Jan. 17, 2019, 6 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) N/A 3.1 μg/m3 (13) 32.0
 
Jan. 17, 2019, 5 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 2.9 μg/m3 (12) 31.0
 
Jan. 17, 2019, 4 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) N/A 2.9 μg/m3 (12) 31.0
 
Jan. 17, 2019, 3 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) N/A 3.1 μg/m3 (13) 30.0
 
Jan. 17, 2019, 2 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) N/A 3.2 μg/m3 (13) 30.0
 
Jan. 17, 2019, 1 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 3.8 μg/m3 (16) 28.0