ID: 867

AQSQID: 500070007

Site Name: Underhill

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

Updated: July 25, 2021, 10:54 p.m.

Location: Underhill (Harvey Rd), VT

Reporting: True, Located: True

Current AQI: 54.0

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
July 25, 2021, 9 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 13.1 μg/m3 (54) 54.0
 
July 25, 2021, 8 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 14.3 μg/m3 (56) 56.0
 
July 25, 2021, 7 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 13.1 μg/m3 (54) 54.0
 
July 25, 2021, 6 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 45.0 ppb (42) 0.16 ppb (3) N/A 10.6 μg/m3 (45) 45.0
 
July 25, 2021, 5 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.15 ppb (2) N/A 9.3 μg/m3 (39) 40.0
 
July 25, 2021, 4 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 43.0 ppb (40) 0.16 ppb (3) N/A 8.6 μg/m3 (36) 40.0
 
July 25, 2021, 3 p.m. N/A 0.1 ppb (1) 1.1 ppb (2) N/A 1.0 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 25, 2021, 2 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 25, 2021, 1 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) N/A 9.9 μg/m3 (42) 42.0
 
July 25, 2021, noon N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 44.0 ppb (41) 0.14 ppb (2) N/A 8.4 μg/m3 (36) 41.0
 
July 25, 2021, 11 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 (43) 0.15 ppb (2) N/A 10.0 μg/m3 (42) 43.0
 
July 25, 2021, 10 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 49.0 ppb (46) 0.15 ppb (2) N/A 11.6 μg/m3 (49) 49.0
 
July 25, 2021, 9 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 49.0 ppb (46) 0.15 ppb (2) N/A 11.1 μg/m3 (47) 47.0
 
July 25, 2021, 8 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.1 ppb (2) 0.0 ppb (0) 50.0 ppb (47) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 25, 2021, 7 a.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) N/A 46.0 ppb (43) 0.15 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
July 25, 2021, 6 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) N/A 0.15 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
July 25, 2021, 4 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 37.0 ppb (35) 0.12 ppb (2) N/A 7.4 μg/m3 (31) 35.0
 
July 25, 2021, 3 a.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) 0.11 ppb (2) N/A 6.7 μg/m3 (28) 34.0
 
July 25, 2021, 2 a.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) 0.11 ppb (2) N/A 6.4 μg/m3 (27) 34.0
 
July 25, 2021, 1 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) 0.1 ppb (2) N/A 6.4 μg/m3 (27) 32.0
 
July 25, 2021, midnight N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.1 ppb (2) N/A 6.3 μg/m3 (27) 27.0
 
July 24, 2021, 11 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.1 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
July 24, 2021, 10 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.1 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
July 24, 2021, 9 p.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) 0.09 ppb (2) N/A 6.5 μg/m3 (28) 30.0
 
July 24, 2021, 8 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.09 ppb (2) N/A 6.1 μg/m3 (26) 32.0
 
July 24, 2021, 7 p.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) 0.09 ppb (2) N/A 6.1 μg/m3 (26) 30.0
 
July 24, 2021, 6 p.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) 0.09 ppb (2) N/A 6.3 μg/m3 (27) 31.0
 
July 24, 2021, 5 p.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) 0.09 ppb (2) N/A 6.7 μg/m3 (28) 31.0
 
July 24, 2021, 4 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
July 24, 2021, 3 p.m. N/A 0.1 ppb (1) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
July 24, 2021, 2 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.1 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
July 24, 2021, 1 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
July 24, 2021, noon N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.1 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
July 24, 2021, 11 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.09 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
July 24, 2021, 10 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 20.0 ppb (19) 0.1 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
July 24, 2021, 9 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.11 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
July 24, 2021, 8 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 26.0 ppb (25) N/A N/A 7.4 μg/m3 (31) 31.0
 
July 24, 2021, 7 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) N/A 25.0 ppb (24) 0.1 ppb (2) N/A 7.2 μg/m3 (31) 31.0
 
July 24, 2021, 6 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) N/A 0.1 ppb (2) N/A 7.2 μg/m3 (31) 31.0
 
July 24, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.1 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
July 24, 2021, 4 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.1 ppb (2) N/A 7.2 μg/m3 (31) 31.0
 
July 24, 2021, 3 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.1 ppb (2) 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
July 24, 2021, 2 a.m. N/A -0.1 ppb (0) 1.4 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 40.0 ppb (38) 0.12 ppb (2) N/A 8.0 μg/m3 (34) 38.0
 
July 24, 2021, 1 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.11 ppb (2) N/A 8.0 μg/m3 (34) 36.0
 
July 24, 2021, midnight N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.11 ppb (2) N/A 7.5 μg/m3 (32) 33.0
 
July 23, 2021, 11 p.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 39.0 ppb (37) 0.11 ppb (2) N/A 6.8 μg/m3 (29) 37.0
 
July 23, 2021, 10 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.1 ppb (2) N/A 6.6 μg/m3 (28) 37.0
 
July 23, 2021, 9 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.09 ppb (2) N/A 6.3 μg/m3 (27) 36.0
 
July 23, 2021, 8 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 6.1 μg/m3 (26) 32.0
 
July 23, 2021, 7 p.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 6.3 μg/m3 (27) 30.0
 
July 23, 2021, 6 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 6.5 μg/m3 (28) 29.0
 
July 23, 2021, 5 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.09 ppb (2) N/A 6.8 μg/m3 (29) 29.0
 
July 23, 2021, 4 p.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 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 3 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 2 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
July 23, 2021, 1 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.09 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
July 23, 2021, noon N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.1 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
July 23, 2021, 11 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 12.0 ppb (12) 0.09 ppb (2) N/A 6.8 μg/m3 (29) 29.0
 
July 23, 2021, 10 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 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 9 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.09 ppb (2) N/A 7.5 μg/m3 (32) 32.0
 
July 23, 2021, 8 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 19.0 ppb (18) N/A N/A 7.8 μg/m3 (33) 33.0
 
July 23, 2021, 7 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) N/A 20.0 ppb (19) 0.09 ppb (2) N/A 7.8 μg/m3 (33) 33.0
 
July 23, 2021, 6 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) N/A 0.09 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
July 23, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.09 ppb (2) N/A 8.5 μg/m3 (36) 36.0
 
July 23, 2021, 4 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 20.0 ppb (19) 0.09 ppb (2) N/A 9.9 μg/m3 (42) 42.0
 
July 23, 2021, 3 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.1 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
July 23, 2021, 2 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 26.0 ppb (25) 0.09 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 1 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.08 ppb (2) N/A 8.8 μg/m3 (37) 37.0
 
July 23, 2021, midnight N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.1 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
July 22, 2021, 11 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 10 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.09 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
July 22, 2021, 9 p.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 6.3 μg/m3 (27) 28.0
 
July 22, 2021, 8 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.08 ppb (2) N/A 5.7 μg/m3 (24) 26.0
 
July 22, 2021, 7 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.08 ppb (2) N/A 5.7 μg/m3 (24) 25.0
 
July 22, 2021, 6 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 5 p.m. N/A 0.1 ppb (1) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 29.0 ppb (27) 0.1 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 4 p.m. N/A 0.1 ppb (1) 1.1 ppb (2) N/A 1.0 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.1 ppb (2) N/A 9.3 μg/m3 (39) 39.0
 
July 22, 2021, 3 p.m. N/A 0.1 ppb (1) 1.1 ppb (2) N/A 1.0 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.11 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
July 22, 2021, 2 p.m. N/A 0.1 ppb (1) 1.2 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 22.0 ppb (21) 0.11 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
July 22, 2021, 1 p.m. N/A 0.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.11 ppb (2) N/A 10.1 μg/m3 (43) 43.0
 
July 22, 2021, noon N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.12 ppb (2) N/A 8.6 μg/m3 (36) 36.0
 
July 22, 2021, 11 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 9.0 ppb (9) 0.11 ppb (2) N/A 8.7 μg/m3 (37) 37.0
 
July 22, 2021, 10 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 14.0 ppb (13) 0.11 ppb (2) N/A 9.1 μg/m3 (38) 38.0
 
July 22, 2021, 9 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.11 ppb (2) N/A 8.9 μg/m3 (38) 38.0
 
July 22, 2021, 8 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 22.0 ppb (21) N/A N/A 8.1 μg/m3 (34) 34.0
 
July 22, 2021, 7 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) N/A 20.0 ppb (19) 0.1 ppb (2) N/A 7.7 μg/m3 (33) 33.0
 
July 22, 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 0.1 ppb (2) N/A 7.5 μg/m3 (32) 32.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.1 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
July 22, 2021, 4 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.1 ppb (2) N/A 7.3 μg/m3 (31) 31.0
 
July 22, 2021, 3 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.1 ppb (2) N/A 7.2 μg/m3 (31) 31.0
 
July 22, 2021, 2 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 20.0 ppb (19) 0.1 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
July 22, 2021, 1 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 17.0 ppb (16) 0.1 ppb (2) N/A 7.8 μg/m3 (33) 33.0
 
July 22, 2021, midnight N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 15.0 ppb (14) 0.13 ppb (2) N/A 8.5 μg/m3 (36) 36.0
 
July 21, 2021, 11 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 23.0 ppb (22) 0.13 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
July 21, 2021, 10 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.15 ppb (2) N/A 8.9 μg/m3 (38) 38.0
 
July 21, 2021, 9 p.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) 0.14 ppb (2) N/A 9.3 μg/m3 (39) 39.0
 
July 21, 2021, 8 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 26.0 ppb (25) 0.13 ppb (2) N/A 10.9 μg/m3 (46) 46.0
 
July 21, 2021, 7 p.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 23.0 ppb (22) 0.13 ppb (2) N/A 12.1 μg/m3 (51) 51.0
 
July 21, 2021, 6 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.12 ppb (2) N/A 10.5 μg/m3 (44) 44.0
 
July 21, 2021, 5 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.11 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
July 21, 2021, 4 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.11 ppb (2) N/A 9.2 μg/m3 (39) 39.0
 
July 21, 2021, 3 p.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.0 ppb (1) 0.0 ppb (0) 26.0 ppb (25) 0.13 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 21, 2021, 2 p.m. N/A 0.0 ppb (0) 1.3 ppb (2) N/A 1.3 ppb (2) N/A 23.0 ppb (22) 0.14 ppb (2) N/A 8.2 μg/m3 (35) 35.0
 
July 21, 2021, 1 p.m. N/A 0.1 ppb (1) 1.6 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 21.0 ppb (20) 0.13 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
July 21, 2021, noon N/A 0.1 ppb (1) 1.5 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 21.0 ppb (20) 0.13 ppb (2) N/A 4.9 μg/m3 (21) 21.0
 
July 21, 2021, 11 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.14 ppb (2) N/A 4.1 μg/m3 (18) 18.0
 
July 21, 2021, 10 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.15 ppb (2) N/A 6.5 μg/m3 (28) 28.0
 
July 21, 2021, 9 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) 0.2 ppb (3) N/A 7.7 μg/m3 (33) 33.0
 
July 21, 2021, 8 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 40.0 ppb (38) N/A N/A 12.0 μg/m3 (50) 50.0
 
July 21, 2021, 7 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) N/A 41.0 ppb (38) 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 21, 2021, 6 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) N/A 0.29 ppb (4) N/A 9.1 μg/m3 (38) 38.0
 
July 21, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.3 ppb (4) N/A 6.3 μg/m3 (27) 35.0
 
July 21, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.27 ppb (4) N/A 5.8 μg/m3 (25) 37.0
 
July 21, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.31 ppb (4) N/A 5.8 μg/m3 (25) 33.0
 
July 21, 2021, 2 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
July 21, 2021, 1 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 34.0 ppb (32) 0.32 ppb (4) N/A 4.7 μg/m3 (20) 32.0
 
July 21, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 2.4 μg/m3 (10) 10.0
 
July 20, 2021, 11 p.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) -1.0 ppb (0) 38.0 ppb (36) 0.35 ppb (4) N/A 24.7 μg/m3 (78) 78.0
 
July 20, 2021, 10 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.39 ppb (5) N/A 43.4 μg/m3 (121) 121.0
 
July 20, 2021, 9 p.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.39 ppb (5) N/A 43.1 μg/m3 (120) 120.0
 
July 20, 2021, 8 p.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 40.0 ppb (38) 0.39 ppb (5) N/A 43.6 μg/m3 (121) 121.0
 
July 20, 2021, 7 p.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 39.0 ppb (37) 0.38 ppb (5) N/A 42.7 μg/m3 (119) 119.0
 
July 20, 2021, 6 p.m. N/A 0.0 ppb (0) 1.3 ppb (2) N/A 1.3 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.4 ppb (5) N/A 45.9 μg/m3 (127) 127.0
 
July 20, 2021, 5 p.m. N/A 0.0 ppb (0) 1.3 ppb (2) N/A 1.3 ppb (2) 0.0 ppb (0) 31.0 ppb (29) 0.4 ppb (5) N/A 47.6 μg/m3 (131) 131.0
 
July 20, 2021, 4 p.m. N/A 0.1 ppb (1) 1.3 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 26.0 ppb (25) 0.37 ppb (5) N/A 45.1 μg/m3 (125) 125.0
 
July 20, 2021, 3 p.m. N/A 0.1 ppb (1) 1.2 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 20.0 ppb (19) 0.32 ppb (4) N/A 38.4 μg/m3 (109) 109.0
 
July 20, 2021, 2 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 17.0 ppb (16) 0.31 ppb (4) N/A 38.2 μg/m3 (108) 108.0
 
July 20, 2021, 1 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.3 ppb (4) N/A 37.2 μg/m3 (106) 106.0
 
July 20, 2021, noon N/A 0.0 ppb (0) 1.0 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.3 ppb (4) N/A 37.7 μg/m3 (107) 107.0
 
July 20, 2021, 11 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 12.0 ppb (12) 0.28 ppb (4) N/A 35.4 μg/m3 (100) 100.0
 
July 20, 2021, 10 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 11.0 ppb (11) 0.28 ppb (4) N/A 36.1 μg/m3 (103) 103.0
 
July 20, 2021, 9 a.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 14.0 ppb (13) 0.27 ppb (4) N/A 34.5 μg/m3 (99) 99.0
 
July 20, 2021, 8 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 16.0 ppb (15) N/A N/A 34.8 μg/m3 (99) 99.0
 
July 20, 2021, 7 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) N/A 17.0 ppb (16) 0.23 ppb (3) N/A 28.3 μg/m3 (86) 86.0
 
July 20, 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 0.19 ppb (3) N/A 22.6 μg/m3 (74) 74.0
 
July 20, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.16 ppb (3) N/A 18.3 μg/m3 (65) 65.0
 
July 20, 2021, 4 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.15 ppb (2) N/A 15.8 μg/m3 (59) 59.0
 
July 20, 2021, 3 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.14 ppb (2) N/A 14.7 μg/m3 (57) 57.0
 
July 20, 2021, 2 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.14 ppb (2) N/A 15.5 μg/m3 (59) 59.0
 
July 20, 2021, 1 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 13.0 ppb (13) 0.15 ppb (2) N/A 16.1 μg/m3 (60) 60.0
 
July 20, 2021, midnight N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 9.0 ppb (9) 0.15 ppb (2) N/A 14.3 μg/m3 (56) 56.0
 
July 19, 2021, 11 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 9.0 ppb (9) 0.14 ppb (2) N/A 12.2 μg/m3 (52) 52.0
 
July 19, 2021, 10 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 15.0 ppb (14) 0.14 ppb (2) N/A 11.4 μg/m3 (48) 48.0
 
July 19, 2021, 9 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 15.0 ppb (14) 0.13 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 19, 2021, 8 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 16.0 ppb (15) 0.13 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
July 19, 2021, 7 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.14 ppb (2) N/A 9.4 μg/m3 (40) 40.0
 
July 19, 2021, 6 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.14 ppb (2) N/A 9.3 μg/m3 (39) 39.0
 
July 19, 2021, 5 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) N/A N/A N/A 9.3 μg/m3 (39) 39.0
 
July 19, 2021, 4 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) N/A N/A N/A 9.2 μg/m3 (39) 39.0
 
July 19, 2021, 3 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) N/A 0.13 ppb (2) N/A 8.4 μg/m3 (36) 36.0
 
July 19, 2021, 2 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) N/A 0.13 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
July 19, 2021, 1 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.13 ppb (2) N/A 6.6 μg/m3 (28) 28.0
 
July 19, 2021, noon N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 11 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 10 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.14 ppb (2) N/A 6.7 μg/m3 (28) 28.0
 
July 19, 2021, 9 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.14 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
July 19, 2021, 8 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 0.0 ppb (0) N/A N/A 6.3 μg/m3 (27) 27.0
 
July 19, 2021, 7 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) N/A 0.0 ppb (0) 0.13 ppb (2) N/A 8.4 μg/m3 (36) 36.0
 
July 17, 2021, 11 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.13 ppb (2) N/A 7.8 μg/m3 (33) 33.0
 
July 17, 2021, 10 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.14 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
July 17, 2021, 9 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.14 ppb (2) N/A 7.7 μg/m3 (33) 33.0
 
July 17, 2021, 8 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 0.0 ppb (0) N/A N/A 7.8 μg/m3 (33) 33.0
 
July 17, 2021, 7 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) N/A 0.0 ppb (0) 0.15 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
July 17, 2021, 6 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) N/A 0.15 ppb (2) N/A 8.2 μg/m3 (35) 35.0
 
July 17, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 17, 2021, 4 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 17, 2021, 3 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) 0.15 ppb (2) N/A 7.8 μg/m3 (33) 33.0