AQSQID: 500070007

Site Name: Underhill

Location: Chittenden Co, VT

Reporting: True, Located: True

Current AQI: 33.0

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
March 26, 2019, 5 p.m. N/A 0.4 ppb (0) 2.3 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 43.0 ppb (33) N/A N/A 4.1 μg/m3 (17) 33.0
 
March 26, 2019, 4 p.m. N/A 0.3 ppb (0) 2.0 ppb (2) N/A 1.7 ppb (2) N/A 41.0 ppb (32) 0.12 ppb (1) N/A 4.1 μg/m3 (17) 32.0
 
March 26, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
March 26, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.11 ppb (1) N/A 3.9 μg/m3 (16) 35.0
 
March 26, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.11 ppb (1) N/A 3.7 μg/m3 (15) 35.0
 
March 26, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.12 ppb (1) N/A 4.1 μg/m3 (17) 33.0
 
March 26, 2019, 11 a.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 42.0 ppb (32) 0.12 ppb (1) N/A 4.0 μg/m3 (17) 32.0
 
March 26, 2019, 10 a.m. N/A 0.1 ppb (0) 1.2 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 43.0 ppb (33) 0.12 ppb (1) N/A 3.5 μg/m3 (15) 33.0
 
March 26, 2019, 9 a.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.11 ppb (1) N/A 3.0 μg/m3 (12) 34.0
 
March 26, 2019, 8 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 45.0 ppb (35) N/A N/A 2.7 μg/m3 (11) 35.0
 
March 26, 2019, 7 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) N/A 45.0 ppb (35) 0.11 ppb (1) N/A 2.7 μg/m3 (11) 35.0
 
March 26, 2019, 6 a.m. N/A -0.1 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) N/A 0.12 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
March 26, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 3.0 μg/m3 (12) 35.0
 
March 26, 2019, 4 a.m. N/A 0.1 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) N/A 2.8 μg/m3 (12) 36.0
 
March 26, 2019, 3 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.14 ppb (2) N/A 2.6 μg/m3 (11) 36.0
 
March 26, 2019, 2 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A 3.6 μg/m3 (15) 37.0
 
March 26, 2019, 1 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 37.0
 
March 26, 2019, midnight N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.14 ppb (2) N/A 2.5 μg/m3 (10) 36.0
 
March 25, 2019, 11 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A 2.7 μg/m3 (11) 37.0
 
March 25, 2019, 10 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 38.0
 
March 25, 2019, 9 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.14 ppb (2) N/A 1.9 μg/m3 (8) 38.0
 
March 25, 2019, 8 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 37.0
 
March 25, 2019, 7 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) N/A 1.7 μg/m3 (7) 37.0
 
March 25, 2019, 6 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.14 ppb (2) N/A 1.8 μg/m3 (8) 36.0
 
March 25, 2019, 5 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 36.0
 
March 25, 2019, 4 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 25, 2019, 3 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) N/A 2.1 μg/m3 (9) 35.0
 
March 25, 2019, 2 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 34.0
 
March 25, 2019, 1 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 34.0
 
March 25, 2019, noon N/A 0.0 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 34.0
 
March 25, 2019, 11 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) N/A 3.1 μg/m3 (13) 33.0
 
March 25, 2019, 10 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A 2.9 μg/m3 (12) 34.0
 
March 25, 2019, 9 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) N/A 2.8 μg/m3 (12) 34.0
 
March 25, 2019, 8 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 45.0 ppb (35) N/A N/A 2.5 μg/m3 (10) 35.0
 
March 25, 2019, 7 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) N/A 46.0 ppb (35) 0.12 ppb (1) N/A 2.4 μg/m3 (10) 35.0
 
March 25, 2019, 6 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (0) 0.0 ppb (0) N/A 0.11 ppb (1) N/A 2.5 μg/m3 (10) 10.0
 
March 25, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 39.0
 
March 25, 2019, 4 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 1.5 μg/m3 (6) 38.0
 
March 25, 2019, 3 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 49.0 ppb (38) 0.11 ppb (1) N/A 3.0 μg/m3 (12) 38.0
 
March 25, 2019, 2 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 49.0 ppb (38) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 38.0
 
March 25, 2019, 1 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 50.0 ppb (38) 0.13 ppb (1) N/A 4.5 μg/m3 (19) 38.0
 
March 25, 2019, midnight N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 42.0
 
March 24, 2019, 11 p.m. N/A 0.1 ppb (0) 2.0 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 4.2 μg/m3 (18) 42.0
 
March 24, 2019, 10 p.m. N/A 0.1 ppb (0) 2.1 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.12 ppb (1) N/A 4.5 μg/m3 (19) 42.0
 
March 24, 2019, 9 p.m. N/A 0.1 ppb (0) 2.1 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 56.0 ppb (43) 0.12 ppb (1) N/A 4.8 μg/m3 (20) 43.0
 
March 24, 2019, 8 p.m. N/A 0.1 ppb (0) 2.1 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 56.0 ppb (43) 0.13 ppb (1) N/A 4.4 μg/m3 (18) 43.0
 
March 24, 2019, 7 p.m. N/A 0.1 ppb (0) 2.1 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 42.0
 
March 24, 2019, 6 p.m. N/A 0.1 ppb (0) 2.0 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 4.2 μg/m3 (18) 42.0
 
March 24, 2019, 5 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 53.0 ppb (41) 0.12 ppb (1) N/A 4.0 μg/m3 (17) 41.0
 
March 24, 2019, 4 p.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 52.0 ppb (40) 0.11 ppb (1) N/A 4.4 μg/m3 (18) 40.0
 
March 24, 2019, 3 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 51.0 ppb (39) 0.11 ppb (1) N/A 4.0 μg/m3 (17) 39.0
 
March 24, 2019, 2 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.11 ppb (1) N/A 3.3 μg/m3 (14) 38.0
 
March 24, 2019, 1 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.11 ppb (1) N/A 2.8 μg/m3 (12) 37.0
 
March 24, 2019, noon N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 2.4 μg/m3 (10) 36.0
 
March 24, 2019, 11 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 2.3 μg/m3 (10) 36.0
 
March 24, 2019, 10 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 2.2 μg/m3 (9) 36.0
 
March 24, 2019, 9 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.12 ppb (1) N/A 2.2 μg/m3 (9) 36.0
 
March 24, 2019, 8 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 46.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
March 24, 2019, 7 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) N/A 45.0 ppb (35) 0.13 ppb (1) N/A 2.6 μg/m3 (11) 35.0
 
March 24, 2019, 6 a.m. N/A -0.1 ppb (0) 0.5 ppb (0) N/A 0.5 ppb (0) 0.0 ppb (0) N/A 0.12 ppb (1) N/A 2.7 μg/m3 (11) 11.0
 
March 24, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.12 ppb (1) N/A 2.7 μg/m3 (11) 35.0
 
March 24, 2019, 4 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 2.7 μg/m3 (11) 35.0
 
March 24, 2019, 3 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 3.2 μg/m3 (13) 35.0
 
March 24, 2019, 2 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 35.0
 
March 24, 2019, 1 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) N/A 3.5 μg/m3 (15) 35.0
 
March 24, 2019, midnight N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) N/A 3.5 μg/m3 (15) 36.0
 
March 23, 2019, 11 p.m. N/A 0.1 ppb (0) 1.2 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.12 ppb (1) N/A 2.6 μg/m3 (11) 37.0
 
March 23, 2019, 10 p.m. N/A 0.0 ppb (0) 1.3 ppb (1) N/A 1.2 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 2.8 μg/m3 (12) 36.0
 
March 23, 2019, 9 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.11 ppb (1) N/A 2.4 μg/m3 (10) 37.0
 
March 23, 2019, 8 p.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 38.0
 
March 23, 2019, 7 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.2 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 35.0
 
March 23, 2019, 6 p.m. N/A -0.4 ppb (0) 0.7 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 3.4 μg/m3 (14) 36.0
 
March 23, 2019, 5 p.m. N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 3.5 μg/m3 (15) 35.0
 
March 23, 2019, 4 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) N/A 3.3 μg/m3 (14) 35.0
 
March 23, 2019, 3 p.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) N/A 2.9 μg/m3 (12) 35.0
 
March 23, 2019, 2 p.m. N/A 0.1 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) N/A 2.7 μg/m3 (11) 35.0
 
March 23, 2019, 1 p.m. N/A 0.1 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A 2.6 μg/m3 (11) 34.0
 
March 23, 2019, noon N/A 0.1 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (0) 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) N/A 2.3 μg/m3 (10) 34.0
 
March 23, 2019, 11 a.m. N/A 0.1 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (0) 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) N/A 1.8 μg/m3 (8) 34.0
 
March 23, 2019, 10 a.m. N/A 0.1 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (0) 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A 1.4 μg/m3 (6) 34.0
 
March 23, 2019, 9 a.m. N/A 0.1 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (0) 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 33.0
 
March 23, 2019, 8 a.m. N/A 0.1 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (0) 0.0 ppb (0) 42.0 ppb (32) N/A N/A 0.6 μg/m3 (2) 32.0
 
March 23, 2019, 7 a.m. N/A 0.1 ppb (0) 0.5 ppb (0) N/A 0.5 ppb (0) N/A 41.0 ppb (32) 0.12 ppb (1) N/A 0.6 μg/m3 (2) 32.0
 
March 23, 2019, 6 a.m. N/A 0.1 ppb (0) 0.4 ppb (0) N/A 0.4 ppb (0) 0.0 ppb (0) N/A 0.12 ppb (1) N/A 0.7 μg/m3 (3) 3.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A 0.5 μg/m3 (2) 29.0
 
March 23, 2019, 4 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 0.2 μg/m3 (1) 27.0
 
March 23, 2019, 3 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 35.0 ppb (27) 0.14 ppb (2) N/A 0.5 μg/m3 (2) 27.0
 
March 23, 2019, 2 a.m. N/A 0.1 ppb (0) 2.2 ppb (2) N/A 2.1 ppb (2) 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) N/A 0.3 μg/m3 (1) 31.0
 
March 23, 2019, 1 a.m. N/A 0.1 ppb (0) 2.6 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) N/A 0.3 μg/m3 (1) 32.0
 
March 23, 2019, midnight N/A 0.0 ppb (0) 3.0 ppb (3) N/A 2.9 ppb (3) 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 0.5 μg/m3 (2) 34.0
 
March 22, 2019, 11 p.m. N/A 0.1 ppb (0) 2.2 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 0.6 μg/m3 (2) 34.0
 
March 22, 2019, 10 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 49.0 ppb (38) 0.13 ppb (1) N/A 1.4 μg/m3 (6) 38.0
 
March 22, 2019, 9 p.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 37.0
 
March 22, 2019, 8 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.14 ppb (2) N/A 1.7 μg/m3 (7) 36.0
 
March 22, 2019, 7 p.m. N/A 0.1 ppb (0) 1.2 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 37.0
 
March 22, 2019, 6 p.m. N/A 0.1 ppb (0) 1.2 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.11 ppb (1) N/A 0.9 μg/m3 (4) 37.0
 
March 22, 2019, 5 p.m. N/A 0.1 ppb (0) 1.3 ppb (1) N/A 1.1 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 1.4 μg/m3 (6) 36.0
 
March 22, 2019, 4 p.m. N/A 0.1 ppb (0) 1.3 ppb (1) N/A 1.2 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.11 ppb (1) N/A 1.5 μg/m3 (6) 36.0
 
March 22, 2019, 3 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.12 ppb (1) N/A 2.1 μg/m3 (9) 36.0
 
March 22, 2019, 2 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.2 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 0.8 μg/m3 (3) 35.0
 
March 22, 2019, 1 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 43.0 ppb (33) 0.12 ppb (1) N/A 0.7 μg/m3 (3) 33.0
 
March 22, 2019, noon N/A 0.0 ppb (0) 1.4 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) N/A 1.4 μg/m3 (6) 32.0
 
March 22, 2019, 11 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A 3.3 μg/m3 (14) 34.0
 
March 22, 2019, 10 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 35.0
 
March 22, 2019, 9 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.13 ppb (1) N/A 3.8 μg/m3 (16) 38.0
 
March 22, 2019, 8 a.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 51.0 ppb (39) N/A N/A 3.9 μg/m3 (16) 39.0
 
March 22, 2019, 7 a.m. N/A 0.0 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) N/A 51.0 ppb (39) 0.12 ppb (1) N/A 4.4 μg/m3 (18) 39.0
 
March 22, 2019, 6 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) N/A 0.13 ppb (1) N/A 5.3 μg/m3 (22) 22.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 53.0 ppb (41) 0.13 ppb (1) N/A 4.8 μg/m3 (20) 41.0
 
March 22, 2019, 4 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 53.0 ppb (41) 0.12 ppb (1) N/A 3.6 μg/m3 (15) 41.0
 
March 22, 2019, 3 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.5 ppb (1) 0.0 ppb (0) 52.0 ppb (40) 0.11 ppb (1) N/A 2.7 μg/m3 (11) 40.0
 
March 22, 2019, 2 a.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 51.0 ppb (39) 0.11 ppb (1) N/A 1.9 μg/m3 (8) 39.0
 
March 22, 2019, 1 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 52.0 ppb (40) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 40.0
 
March 22, 2019, midnight N/A 0.1 ppb (0) 2.0 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 52.0 ppb (40) 0.11 ppb (1) N/A 3.7 μg/m3 (15) 40.0
 
March 21, 2019, 11 p.m. N/A 0.0 ppb (0) 2.1 ppb (2) N/A 2.1 ppb (2) 0.0 ppb (0) 53.0 ppb (41) 0.12 ppb (1) N/A 3.6 μg/m3 (15) 41.0
 
March 21, 2019, 10 p.m. N/A 0.0 ppb (0) 2.2 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 3.7 μg/m3 (15) 42.0
 
March 21, 2019, 9 p.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 4.8 μg/m3 (20) 42.0
 
March 21, 2019, 8 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 5.2 μg/m3 (22) 42.0
 
March 21, 2019, 7 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 42.0
 
March 21, 2019, 6 p.m. N/A 0.1 ppb (0) 2.8 ppb (3) N/A 2.6 ppb (2) 0.0 ppb (0) 56.0 ppb (43) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 43.0
 
March 21, 2019, 5 p.m. N/A 0.1 ppb (0) 3.0 ppb (3) N/A 2.8 ppb (3) 0.0 ppb (0) 54.0 ppb (42) 0.1 ppb (1) N/A 4.9 μg/m3 (20) 42.0
 
March 21, 2019, 4 p.m. N/A 0.1 ppb (0) 3.1 ppb (3) N/A 3.0 ppb (3) 0.0 ppb (0) 53.0 ppb (41) 0.1 ppb (1) N/A N/A 41.0
 
March 21, 2019, 3 p.m. N/A 0.1 ppb (0) 3.3 ppb (3) N/A 3.2 ppb (3) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 5.4 μg/m3 (23) 42.0
 
March 21, 2019, 2 p.m. N/A 0.1 ppb (0) 3.5 ppb (3) N/A 3.4 ppb (3) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 5.7 μg/m3 (24) 42.0
 
March 21, 2019, 1 p.m. N/A 0.1 ppb (0) 3.8 ppb (4) N/A 3.7 ppb (3) 0.0 ppb (0) 53.0 ppb (41) 0.11 ppb (1) N/A 5.4 μg/m3 (23) 41.0
 
March 21, 2019, noon N/A 0.1 ppb (0) 4.0 ppb (4) N/A 3.9 ppb (4) 0.0 ppb (0) 52.0 ppb (40) 0.12 ppb (1) N/A 6.0 μg/m3 (25) 40.0
 
March 21, 2019, 11 a.m. N/A 0.1 ppb (0) 4.6 ppb (4) N/A 4.5 ppb (4) 0.0 ppb (0) 51.0 ppb (39) 0.12 ppb (1) N/A 7.6 μg/m3 (32) 39.0
 
March 21, 2019, 10 a.m. N/A 0.1 ppb (0) 5.4 ppb (5) N/A 5.3 ppb (5) 0.0 ppb (0) 51.0 ppb (39) 0.13 ppb (1) N/A 8.6 μg/m3 (36) 39.0
 
March 21, 2019, 9 a.m. N/A 0.1 ppb (0) 5.8 ppb (5) N/A 5.7 ppb (5) 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 8 a.m. N/A 0.1 ppb (0) 6.1 ppb (6) N/A 6.0 ppb (6) 0.0 ppb (0) 49.0 ppb (38) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 21, 2019, 7 a.m. N/A 0.1 ppb (0) 6.3 ppb (6) N/A 6.2 ppb (6) N/A 48.0 ppb (37) 0.15 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
March 21, 2019, 6 a.m. N/A 0.1 ppb (0) 6.4 ppb (6) N/A 6.2 ppb (6) 0.0 ppb (0) N/A 0.16 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.15 ppb (2) N/A 11.1 μg/m3 (46) 46.0
 
March 21, 2019, 4 a.m. N/A 0.1 ppb (0) 3.2 ppb (3) N/A 3.1 ppb (3) 0.0 ppb (0) 54.0 ppb (42) 0.14 ppb (2) N/A 9.6 μg/m3 (40) 42.0
 
March 21, 2019, 3 a.m. N/A 0.1 ppb (0) 2.9 ppb (3) N/A 2.9 ppb (3) 0.0 ppb (0) 54.0 ppb (42) 0.13 ppb (1) N/A 8.0 μg/m3 (33) 42.0
 
March 21, 2019, 2 a.m. N/A 0.1 ppb (0) 2.7 ppb (3) N/A 2.6 ppb (2) 0.0 ppb (0) 56.0 ppb (43) 0.13 ppb (1) N/A 7.6 μg/m3 (32) 43.0
 
March 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) 56.0 ppb (43) 0.13 ppb (1) N/A 7.3 μg/m3 (30) 43.0
 
March 21, 2019, midnight N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 56.0 ppb (43) 0.13 ppb (1) N/A 6.1 μg/m3 (25) 43.0
 
March 20, 2019, 11 p.m. N/A 0.1 ppb (0) 2.3 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.12 ppb (1) N/A 5.1 μg/m3 (21) 42.0
 
March 20, 2019, 10 p.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 5.2 μg/m3 (22) 42.0
 
March 20, 2019, 9 p.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A 2.3 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 5.2 μg/m3 (22) 42.0
 
March 20, 2019, 8 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 5.3 μg/m3 (22) 42.0
 
March 20, 2019, 7 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.4 ppb (2) 0.0 ppb (0) 55.0 ppb (42) 0.12 ppb (1) N/A 5.3 μg/m3 (22) 42.0
 
March 20, 2019, 6 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 5.4 μg/m3 (23) 42.0
 
March 20, 2019, 5 p.m. N/A 0.1 ppb (0) 2.5 ppb (2) N/A 2.5 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 7.0 μg/m3 (29) 42.0
 
March 20, 2019, 4 p.m. N/A 0.1 ppb (0) 2.3 ppb (2) N/A 2.2 ppb (2) 0.0 ppb (0) 54.0 ppb (42) 0.11 ppb (1) N/A 7.8 μg/m3 (32) 42.0
 
March 20, 2019, 3 p.m. N/A 0.1 ppb (0) 2.0 ppb (2) N/A 1.9 ppb (2) 0.0 ppb (0) 53.0 ppb (41) 0.11 ppb (1) N/A 7.4 μg/m3 (31) 41.0
 
March 20, 2019, 2 p.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.6 ppb (1) 0.0 ppb (0) 51.0 ppb (39) 0.1 ppb (1) N/A 6.6 μg/m3 (28) 39.0
 
March 20, 2019, 1 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 38.0
 
March 20, 2019, noon N/A 0.1 ppb (0) 1.1 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 37.0
 
March 20, 2019, 11 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 37.0
 
March 20, 2019, 10 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 36.0
 
March 20, 2019, 9 a.m. N/A 0.1 ppb (0) 0.9 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 36.0
 
March 20, 2019, 8 a.m. N/A 0.2 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 47.0 ppb (36) N/A N/A 2.9 μg/m3 (12) 36.0
 
March 20, 2019, 7 a.m. N/A 0.2 ppb (0) 0.8 ppb (1) N/A 0.6 ppb (1) N/A 47.0 ppb (36) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 36.0
 
March 20, 2019, 6 a.m. N/A 0.2 ppb (0) 0.6 ppb (1) N/A 0.4 ppb (0) 0.0 ppb (0) N/A 0.11 ppb (1) N/A 2.7 μg/m3 (11) 11.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 37.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.11 ppb (1) N/A 3.2 μg/m3 (13) 37.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.11 ppb (1) N/A 3.4 μg/m3 (14) 37.0
 
March 20, 2019, 2 a.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) N/A 48.0 ppb (37) 0.12 ppb (1) N/A 3.9 μg/m3 (16) 37.0
 
March 20, 2019, 1 a.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 49.0 ppb (38) N/A N/A 5.5 μg/m3 (23) 38.0
 
March 20, 2019, midnight 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 3.8 μg/m3 (16) 16.0
 
March 19, 2019, 11 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 48.0 ppb (37) 0.12 ppb (1) N/A 4.3 μg/m3 (18) 37.0
 
March 19, 2019, 10 p.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A 1.3 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.11 ppb (1) N/A 3.5 μg/m3 (15) 38.0
 
March 19, 2019, 9 p.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.12 ppb (1) N/A 3.4 μg/m3 (14) 38.0
 
March 19, 2019, 8 p.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.12 ppb (1) N/A 3.5 μg/m3 (15) 38.0
 
March 19, 2019, 7 p.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A 1.4 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.12 ppb (1) N/A 3.4 μg/m3 (14) 38.0
 
March 19, 2019, 6 p.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A 1.5 ppb (1) 0.0 ppb (0) 50.0 ppb (38) 0.12 ppb (1) N/A 3.2 μg/m3 (13) 38.0