ID: 867

AQSQID: 500070007

Site Name: Underhill

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

Updated: May 15, 2021, 11:50 p.m.

Location: Underhill (Harvey Rd), VT

Reporting: True, Located: True

Current AQI: 48.0

Underhill (Harvey Rd) VT, US: 44.528389, -72.868973

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 15, 2021, 11 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 48.0 ppb (45) 0.08 ppb (2) N/A 4.7 μg/m3 (20) 45.0
 
May 15, 2021, 10 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.08 ppb (2) N/A 4.3 μg/m3 (18) 48.0
 
May 15, 2021, 9 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.09 ppb (2) N/A 4.3 μg/m3 (18) 48.0
 
May 15, 2021, 8 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 52.0 ppb (49) 0.09 ppb (2) N/A 4.3 μg/m3 (18) 49.0
 
May 15, 2021, 7 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.09 ppb (2) N/A 4.3 μg/m3 (18) 48.0
 
May 15, 2021, 6 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 50.0 ppb (47) 0.09 ppb (2) N/A 4.2 μg/m3 (18) 47.0
 
May 15, 2021, 5 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.09 ppb (2) N/A 4.3 μg/m3 (18) 48.0
 
May 15, 2021, 4 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.09 ppb (2) N/A 4.5 μg/m3 (19) 48.0
 
May 15, 2021, 3 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 48.0
 
May 15, 2021, 2 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 50.0 ppb (47) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 47.0
 
May 15, 2021, 1 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 49.0 ppb (46) 0.09 ppb (2) N/A 4.2 μg/m3 (18) 46.0
 
May 15, 2021, noon N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 48.0 ppb (45) 0.08 ppb (2) N/A 4.0 μg/m3 (17) 45.0
 
May 15, 2021, 11 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.08 ppb (2) N/A 4.0 μg/m3 (17) 42.0
 
May 15, 2021, 10 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.08 ppb (2) N/A 3.9 μg/m3 (17) 42.0
 
May 15, 2021, 9 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.09 ppb (2) N/A 3.9 μg/m3 (17) 41.0
 
May 15, 2021, 8 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) N/A N/A 3.8 μg/m3 (16) 42.0
 
May 15, 2021, 7 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) N/A 45.0 ppb (42) 0.08 ppb (2) N/A 3.8 μg/m3 (16) 42.0
 
May 15, 2021, 6 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) N/A 0.07 ppb (2) N/A 3.9 μg/m3 (17) 17.0
 
May 15, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 3.9 μg/m3 (17) 42.0
 
May 15, 2021, 4 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.08 ppb (2) N/A 4.5 μg/m3 (19) 38.0
 
May 15, 2021, 3 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.08 ppb (2) N/A 4.7 μg/m3 (20) 37.0
 
May 15, 2021, 2 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.08 ppb (2) N/A 4.7 μg/m3 (20) 36.0
 
May 15, 2021, 1 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 39.0
 
May 15, 2021, midnight N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.08 ppb (2) N/A 4.2 μg/m3 (18) 41.0
 
May 14, 2021, 11 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 42.0
 
May 14, 2021, 10 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.09 ppb (2) N/A 4.5 μg/m3 (19) 43.0
 
May 14, 2021, 9 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 4.1 μg/m3 (18) 42.0
 
May 14, 2021, 8 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 4.0 μg/m3 (17) 42.0
 
May 14, 2021, 7 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 4.2 μg/m3 (18) 42.0
 
May 14, 2021, 6 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.1 ppb (2) N/A 4.3 μg/m3 (18) 41.0
 
May 14, 2021, 5 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.1 ppb (2) N/A 4.3 μg/m3 (18) 41.0
 
May 14, 2021, 4 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.1 ppb (2) N/A 4.5 μg/m3 (19) 41.0
 
May 14, 2021, 3 p.m. N/A 0.1 ppb (1) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.1 ppb (2) N/A 4.7 μg/m3 (20) 42.0
 
May 14, 2021, 2 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 4.6 μg/m3 (20) 42.0
 
May 14, 2021, 1 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 41.0
 
May 14, 2021, noon N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 42.0
 
May 14, 2021, 11 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 38.0
 
May 14, 2021, 10 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.08 ppb (2) N/A 4.6 μg/m3 (20) 37.0
 
May 14, 2021, 9 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.1 ppb (2) 0.0 ppb (0) 39.0 ppb (37) 0.09 ppb (2) N/A 5.3 μg/m3 (23) 37.0
 
May 14, 2021, 8 a.m. N/A 0.0 ppb (0) 1.3 ppb (2) N/A 1.3 ppb (2) 0.0 ppb (0) 38.0 ppb (36) N/A N/A 5.6 μg/m3 (24) 36.0
 
May 14, 2021, 7 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) N/A 38.0 ppb (36) 0.08 ppb (2) N/A 5.0 μg/m3 (21) 36.0
 
May 14, 2021, 6 a.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) N/A 0.08 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 14, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.08 ppb (2) N/A 5.3 μg/m3 (23) 36.0
 
May 14, 2021, 4 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.08 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
May 14, 2021, 3 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.1 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.08 ppb (2) N/A 4.8 μg/m3 (20) 41.0
 
May 14, 2021, 2 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 (42) 0.08 ppb (2) N/A 4.7 μg/m3 (20) 42.0
 
May 14, 2021, 1 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 (42) 0.08 ppb (2) N/A 4.7 μg/m3 (20) 42.0
 
May 14, 2021, midnight N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.08 ppb (2) N/A 4.6 μg/m3 (20) 43.0
 
May 13, 2021, 11 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 48.0 ppb (45) 0.08 ppb (2) N/A 4.6 μg/m3 (20) 45.0
 
May 13, 2021, 10 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 51.0 ppb (48) 0.08 ppb (2) N/A 4.6 μg/m3 (20) 48.0
 
May 13, 2021, 9 p.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 54.0 ppb (50) 0.09 ppb (2) N/A 5.0 μg/m3 (21) 50.0
 
May 13, 2021, 8 p.m. N/A 0.1 ppb (1) 1.7 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) 52.0 ppb (49) 0.09 ppb (2) N/A 4.9 μg/m3 (21) 49.0
 
May 13, 2021, 7 p.m. N/A 0.1 ppb (1) 1.4 ppb (2) N/A 1.3 ppb (2) 0.0 ppb (0) 49.0 ppb (46) 0.09 ppb (2) N/A 4.4 μg/m3 (19) 46.0
 
May 13, 2021, 6 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.09 ppb (2) N/A 3.8 μg/m3 (16) 43.0
 
May 13, 2021, 5 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 44.0 ppb (41) N/A N/A 3.6 μg/m3 (16) 41.0
 
May 13, 2021, 4 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 45.0 ppb (42) N/A N/A 3.6 μg/m3 (16) 42.0
 
May 13, 2021, 3 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 45.0 ppb (42) N/A N/A 3.6 μg/m3 (16) 42.0
 
May 13, 2021, 2 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.4 μg/m3 (15) 38.0
 
May 13, 2021, 1 p.m. N/A 0.1 ppb (1) 1.0 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (38) N/A N/A N/A 38.0
 
May 13, 2021, noon N/A 0.1 ppb (1) 1.2 ppb (2) N/A 1.0 ppb (1) 1.0 ppb (2) 41.0 ppb (38) 0.1 ppb (2) N/A 3.6 μg/m3 (16) 38.0
 
May 13, 2021, 11 a.m. N/A 0.1 ppb (1) 1.2 ppb (2) N/A 1.1 ppb (2) 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 3.6 μg/m3 (16) 35.0
 
May 13, 2021, 10 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 36.0 ppb (34) 0.1 ppb (2) N/A 3.5 μg/m3 (15) 34.0
 
May 13, 2021, 9 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.1 ppb (2) N/A 3.2 μg/m3 (14) 33.0
 
May 13, 2021, 8 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 35.0 ppb (33) N/A N/A 3.2 μg/m3 (14) 33.0
 
May 13, 2021, 7 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) N/A 34.0 ppb (32) 0.1 ppb (2) N/A 3.2 μg/m3 (14) 32.0
 
May 13, 2021, 6 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) N/A 0.1 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
May 13, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 2.6 μg/m3 (11) 30.0
 
May 13, 2021, 4 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 2.3 μg/m3 (10) 29.0
 
May 13, 2021, 3 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.09 ppb (2) N/A 2.3 μg/m3 (10) 27.0
 
May 13, 2021, 2 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 2.6 μg/m3 (11) 29.0
 
May 13, 2021, 1 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 3.3 μg/m3 (14) 29.0
 
May 13, 2021, midnight N/A 0.0 ppb (0) 0.9 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 4.2 μg/m3 (18) 30.0
 
May 12, 2021, 11 p.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.1 ppb (2) N/A 3.2 μg/m3 (14) 33.0
 
May 12, 2021, 10 p.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 37.0 ppb (35) 0.09 ppb (2) N/A 2.7 μg/m3 (12) 35.0
 
May 12, 2021, 9 p.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.0 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.09 ppb (2) N/A 2.9 μg/m3 (13) 37.0
 
May 12, 2021, 8 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.08 ppb (2) N/A 3.0 μg/m3 (13) 38.0
 
May 12, 2021, 7 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 (38) 0.09 ppb (2) N/A 3.0 μg/m3 (13) 38.0
 
May 12, 2021, 6 p.m. N/A 0.1 ppb (1) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.09 ppb (2) N/A 2.8 μg/m3 (12) 38.0
 
May 12, 2021, 5 p.m. N/A 0.1 ppb (1) 1.2 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) N/A 3.0 μg/m3 (13) 39.0
 
May 12, 2021, 4 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.08 ppb (2) N/A 3.0 μg/m3 (13) 36.0
 
May 12, 2021, 3 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.08 ppb (2) N/A 3.4 μg/m3 (15) 33.0
 
May 12, 2021, 2 p.m. N/A 0.1 ppb (1) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.07 ppb (2) N/A 3.4 μg/m3 (15) 25.0
 
May 12, 2021, 1 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.07 ppb (2) N/A 3.5 μg/m3 (15) 23.0
 
May 12, 2021, noon N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.08 ppb (2) N/A 3.7 μg/m3 (16) 21.0
 
May 12, 2021, 11 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 17.0 ppb (16) 0.08 ppb (2) N/A 3.3 μg/m3 (14) 16.0
 
May 12, 2021, 10 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 16.0 ppb (15) 0.08 ppb (2) N/A 2.3 μg/m3 (10) 15.0
 
May 12, 2021, 9 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 17.0 ppb (16) 0.09 ppb (2) N/A 1.5 μg/m3 (7) 16.0
 
May 12, 2021, 8 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 19.0 ppb (18) N/A N/A 0.7 μg/m3 (3) 18.0
 
May 12, 2021, 7 a.m. N/A 0.0 ppb (0) 0.1 ppb (1) N/A 0.2 ppb (1) N/A 19.0 ppb (18) 0.09 ppb (2) N/A 0.3 μg/m3 (2) 18.0
 
May 12, 2021, 6 a.m. N/A 0.0 ppb (0) 0.1 ppb (1) N/A 0.1 ppb (1) 0.0 ppb (0) N/A 0.09 ppb (2) N/A 0.2 μg/m3 (1) 2.0
 
May 12, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.08 ppb (2) N/A 0.4 μg/m3 (2) 21.0
 
May 12, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.08 ppb (2) N/A 0.8 μg/m3 (4) 24.0
 
May 12, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.08 ppb (2) N/A 1.0 μg/m3 (5) 25.0
 
May 12, 2021, 2 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.08 ppb (2) N/A 1.1 μg/m3 (5) 27.0
 
May 12, 2021, 1 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) N/A 29.0 ppb (27) 0.07 ppb (2) N/A 1.5 μg/m3 (7) 27.0
 
May 12, 2021, midnight N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) N/A 0.07 ppb (2) N/A 1.4 μg/m3 (6) 6.0
 
May 11, 2021, 11 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 30.0 ppb (28) 0.08 ppb (2) N/A 1.7 μg/m3 (8) 28.0
 
May 11, 2021, 10 p.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.08 ppb (2) N/A 1.6 μg/m3 (7) 30.0
 
May 11, 2021, 9 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.09 ppb (2) N/A 1.2 μg/m3 (5) 33.0
 
May 11, 2021, 8 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.08 ppb (2) N/A 1.0 μg/m3 (5) 32.0
 
May 11, 2021, 7 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 33.0 ppb (31) 0.08 ppb (2) N/A 0.8 μg/m3 (4) 31.0
 
May 11, 2021, 6 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 33.0 ppb (31) 0.08 ppb (2) N/A 1.2 μg/m3 (5) 31.0
 
May 11, 2021, 5 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.08 ppb (2) N/A 1.6 μg/m3 (7) 33.0
 
May 11, 2021, 4 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 36.0 ppb (34) 0.07 ppb (2) N/A 1.3 μg/m3 (6) 34.0
 
May 11, 2021, 3 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.07 ppb (2) N/A 1.8 μg/m3 (8) 32.0
 
May 11, 2021, 2 p.m. N/A 0.1 ppb (1) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.07 ppb (2) N/A 2.5 μg/m3 (11) 29.0
 
May 11, 2021, 1 p.m. N/A 0.1 ppb (1) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 30.0 ppb (28) 0.07 ppb (2) N/A 2.9 μg/m3 (13) 28.0
 
May 11, 2021, noon N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.07 ppb (2) N/A 3.3 μg/m3 (14) 30.0
 
May 11, 2021, 11 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.08 ppb (2) N/A 3.7 μg/m3 (16) 33.0
 
May 11, 2021, 10 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.07 ppb (2) N/A 3.7 μg/m3 (16) 30.0
 
May 11, 2021, 9 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 33.0 ppb (31) 0.07 ppb (2) N/A 3.7 μg/m3 (16) 31.0
 
May 11, 2021, 8 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 35.0 ppb (33) N/A N/A 3.5 μg/m3 (15) 33.0
 
May 11, 2021, 7 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) N/A 35.0 ppb (33) 0.07 ppb (2) N/A 3.3 μg/m3 (14) 33.0
 
May 11, 2021, 6 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) N/A 0.08 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
May 11, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (32) 0.07 ppb (2) N/A 3.2 μg/m3 (14) 32.0
 
May 11, 2021, 4 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 37.0 ppb (35) 0.07 ppb (2) N/A 3.3 μg/m3 (14) 35.0
 
May 11, 2021, 3 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.08 ppb (2) N/A 3.7 μg/m3 (16) 36.0
 
May 11, 2021, 2 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 37.0 ppb (35) 0.08 ppb (2) N/A 3.9 μg/m3 (17) 35.0
 
May 11, 2021, 1 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.09 ppb (2) N/A 3.6 μg/m3 (16) 37.0
 
May 11, 2021, midnight N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.1 ppb (2) N/A 3.4 μg/m3 (15) 37.0
 
May 10, 2021, 11 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.1 ppb (2) N/A 3.3 μg/m3 (14) 38.0
 
May 10, 2021, 10 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 (38) 0.1 ppb (2) N/A 3.3 μg/m3 (14) 38.0
 
May 10, 2021, 9 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.09 ppb (2) N/A 2.8 μg/m3 (12) 40.0
 
May 10, 2021, 8 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) N/A 2.6 μg/m3 (11) 39.0
 
May 10, 2021, 7 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) N/A 2.7 μg/m3 (12) 39.0
 
May 10, 2021, 6 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.09 ppb (2) N/A 2.6 μg/m3 (11) 40.0
 
May 10, 2021, 5 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.09 ppb (2) N/A 3.1 μg/m3 (13) 40.0
 
May 10, 2021, 4 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.09 ppb (2) N/A 3.3 μg/m3 (14) 39.0
 
May 10, 2021, 3 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.09 ppb (2) N/A 3.4 μg/m3 (15) 38.0
 
May 10, 2021, 2 p.m. N/A 0.1 ppb (1) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.09 ppb (2) N/A 3.7 μg/m3 (16) 36.0
 
May 10, 2021, 1 p.m. N/A 0.1 ppb (1) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.09 ppb (2) N/A 3.9 μg/m3 (17) 33.0
 
May 10, 2021, noon N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.09 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
May 10, 2021, 11 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 3.7 μg/m3 (16) 29.0
 
May 10, 2021, 10 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 3.2 μg/m3 (14) 29.0
 
May 10, 2021, 9 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.09 ppb (2) N/A 3.2 μg/m3 (14) 30.0
 
May 10, 2021, 8 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 27.0 ppb (25) N/A N/A 3.1 μg/m3 (13) 25.0
 
May 10, 2021, 7 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) N/A 26.0 ppb (25) 0.08 ppb (2) N/A 3.1 μg/m3 (13) 25.0
 
May 10, 2021, 6 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) N/A 0.09 ppb (2) N/A 3.0 μg/m3 (13) 13.0
 
May 10, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.09 ppb (2) N/A 3.2 μg/m3 (14) 34.0
 
May 10, 2021, 4 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.08 ppb (2) N/A 3.4 μg/m3 (15) 30.0
 
May 10, 2021, 3 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 33.0 ppb (31) 0.09 ppb (2) N/A 3.5 μg/m3 (15) 31.0
 
May 10, 2021, 2 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.09 ppb (2) N/A 2.9 μg/m3 (13) 32.0
 
May 10, 2021, 1 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.09 ppb (2) N/A 2.7 μg/m3 (12) 32.0
 
May 10, 2021, midnight N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 3.4 μg/m3 (15) 32.0
 
May 9, 2021, 11 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 36.0 ppb (34) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
May 9, 2021, 10 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.1 ppb (2) N/A 2.9 μg/m3 (13) 37.0
 
May 9, 2021, 9 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.1 ppb (2) N/A 2.6 μg/m3 (11) 37.0
 
May 9, 2021, 8 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.1 ppb (2) N/A 2.5 μg/m3 (11) 38.0
 
May 9, 2021, 7 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.09 ppb (2) N/A 2.2 μg/m3 (10) 38.0
 
May 9, 2021, 6 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.09 ppb (2) N/A 2.1 μg/m3 (9) 37.0
 
May 9, 2021, 5 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 37.0 ppb (35) 0.09 ppb (2) N/A 2.3 μg/m3 (10) 35.0
 
May 9, 2021, 4 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 37.0 ppb (35) 0.08 ppb (2) N/A 2.4 μg/m3 (10) 35.0
 
May 9, 2021, 3 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 36.0 ppb (34) 0.09 ppb (2) N/A 2.5 μg/m3 (11) 34.0
 
May 9, 2021, 2 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 36.0 ppb (34) 0.09 ppb (2) N/A 1.9 μg/m3 (8) 34.0
 
May 9, 2021, 1 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 36.0 ppb (34) 0.08 ppb (2) N/A 1.6 μg/m3 (7) 34.0
 
May 9, 2021, noon N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.08 ppb (2) N/A 1.6 μg/m3 (7) 33.0
 
May 9, 2021, 11 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.08 ppb (2) N/A 1.7 μg/m3 (8) 32.0
 
May 9, 2021, 10 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 33.0 ppb (31) 0.08 ppb (2) N/A 1.4 μg/m3 (6) 31.0
 
May 9, 2021, 9 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 33.0 ppb (31) 0.08 ppb (2) N/A 1.2 μg/m3 (5) 31.0
 
May 9, 2021, 8 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 31.0 ppb (29) N/A N/A 1.7 μg/m3 (8) 29.0
 
May 9, 2021, 7 a.m. N/A -0.1 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) N/A 30.0 ppb (28) 0.09 ppb (2) N/A 1.6 μg/m3 (7) 28.0
 
May 9, 2021, 6 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) N/A 0.09 ppb (2) N/A 1.9 μg/m3 (8) 8.0
 
May 9, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 2.3 μg/m3 (10) 26.0
 
May 9, 2021, 4 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 30.0 ppb (28) 0.09 ppb (2) N/A 2.7 μg/m3 (12) 28.0
 
May 9, 2021, 3 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.09 ppb (2) N/A 3.1 μg/m3 (13) 30.0
 
May 9, 2021, 2 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 3.2 μg/m3 (14) 32.0
 
May 9, 2021, 1 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 37.0 ppb (35) 0.09 ppb (2) N/A 2.9 μg/m3 (13) 35.0
 
May 9, 2021, midnight N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.09 ppb (2) N/A 2.8 μg/m3 (12) 36.0