ID: 867

AQSQID: 500070007

Site Name: Underhill

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

Updated: Oct. 25, 2021, 11:02 a.m.

Location: Underhill (Harvey Rd), VT

Reporting: True, Located: True

Current AQI: 28.0

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
Oct. 25, 2021, 9 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 30.0 ppb (28) 0.01 ppb (0) N/A 2.6 μg/m3 (11) 28.0
 
Oct. 25, 2021, 8 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 29.0 ppb (27) N/A N/A 2.2 μg/m3 (10) 27.0
 
Oct. 25, 2021, 7 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) N/A 24.0 ppb (23) 0.01 ppb (0) N/A 3.2 μg/m3 (14) 23.0
 
Oct. 25, 2021, 6 a.m. N/A -0.1 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) N/A 0.01 ppb (0) N/A 2.5 μg/m3 (11) 11.0
 
Oct. 25, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.0 ppb (0) N/A 3.1 μg/m3 (13) 21.0
 
Oct. 25, 2021, 4 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.0 ppb (0) N/A 2.8 μg/m3 (12) 23.0
 
Oct. 25, 2021, 3 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 23.0
 
Oct. 25, 2021, 2 a.m. N/A 0.0 ppb (0) 0.1 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 23.0 ppb (22) 0.0 ppb (0) N/A 1.9 μg/m3 (8) 22.0
 
Oct. 25, 2021, 1 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.01 ppb (0) N/A 2.2 μg/m3 (10) 23.0
 
Oct. 25, 2021, midnight N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 23.0 ppb (22) 0.01 ppb (0) N/A 2.5 μg/m3 (11) 22.0
 
Oct. 24, 2021, 11 p.m. N/A -0.1 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.01 ppb (0) N/A 2.6 μg/m3 (11) 20.0
 
Oct. 24, 2021, 10 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.01 ppb (0) N/A 2.5 μg/m3 (11) 23.0
 
Oct. 24, 2021, 9 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 26.0 ppb (25) 0.01 ppb (0) N/A 2.3 μg/m3 (10) 25.0
 
Oct. 24, 2021, 8 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.0 ppb (0) N/A 2.3 μg/m3 (10) 26.0
 
Oct. 24, 2021, 7 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 28.0 ppb (26) 0.0 ppb (0) N/A 2.0 μg/m3 (9) 26.0
 
Oct. 24, 2021, 6 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 29.0 ppb (27) 0.0 ppb (0) N/A 2.1 μg/m3 (9) 27.0
 
Oct. 24, 2021, 5 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 27.0 ppb (25) 0.0 ppb (0) N/A 2.2 μg/m3 (10) 25.0
 
Oct. 24, 2021, 4 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 26.0 ppb (25) 0.01 ppb (0) N/A 2.2 μg/m3 (10) 25.0
 
Oct. 24, 2021, 3 p.m. N/A 0.1 ppb (1) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 26.0 ppb (25) 0.01 ppb (0) N/A 2.5 μg/m3 (11) 25.0
 
Oct. 24, 2021, 2 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 23.0 ppb (22) 0.01 ppb (0) N/A 2.9 μg/m3 (13) 22.0
 
Oct. 24, 2021, 1 p.m. N/A 0.1 ppb (1) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.01 ppb (0) N/A 2.7 μg/m3 (12) 21.0
 
Oct. 24, 2021, noon N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 17.0
 
Oct. 24, 2021, 11 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) N/A N/A 2.4 μg/m3 (10) 17.0
 
Oct. 24, 2021, 10 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 19.0 ppb (18) 0.0 ppb (0) N/A 2.3 μg/m3 (10) 18.0
 
Oct. 24, 2021, 9 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 17.0 ppb (16) 0.01 ppb (0) N/A 3.0 μg/m3 (13) 16.0
 
Oct. 24, 2021, 8 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 15.0 ppb (14) N/A N/A 3.1 μg/m3 (13) 14.0
 
Oct. 24, 2021, 7 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) N/A 17.0 ppb (16) 0.01 ppb (0) N/A 3.1 μg/m3 (13) 16.0
 
Oct. 24, 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 0.01 ppb (0) N/A 3.1 μg/m3 (13) 13.0
 
Oct. 24, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.01 ppb (0) N/A 3.3 μg/m3 (14) 18.0
 
Oct. 24, 2021, 4 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.01 ppb (0) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 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) 19.0 ppb (18) 0.01 ppb (0) N/A 4.2 μg/m3 (18) 18.0
 
Oct. 24, 2021, 2 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 20.0 ppb (19) 0.01 ppb (0) N/A 4.1 μg/m3 (18) 19.0
 
Oct. 24, 2021, 1 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 17.0 ppb (16) 0.01 ppb (0) N/A 4.3 μg/m3 (18) 18.0
 
Oct. 24, 2021, midnight N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 17.0 ppb (16) 0.02 ppb (0) N/A 5.3 μg/m3 (23) 23.0
 
Oct. 23, 2021, 11 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.01 ppb (0) N/A 3.9 μg/m3 (17) 17.0
 
Oct. 23, 2021, 10 p.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) 0.02 ppb (0) N/A 3.6 μg/m3 (16) 18.0
 
Oct. 23, 2021, 9 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.01 ppb (0) N/A 3.5 μg/m3 (15) 23.0
 
Oct. 23, 2021, 8 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) 0.01 ppb (0) N/A 2.6 μg/m3 (11) 24.0
 
Oct. 23, 2021, 7 p.m. N/A 0.1 ppb (1) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.01 ppb (0) N/A 3.3 μg/m3 (14) 24.0
 
Oct. 23, 2021, 6 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.01 ppb (0) N/A 3.8 μg/m3 (16) 23.0
 
Oct. 23, 2021, 5 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.01 ppb (0) N/A 4.1 μg/m3 (18) 20.0
 
Oct. 23, 2021, 4 p.m. N/A 0.1 ppb (1) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.01 ppb (0) N/A 3.4 μg/m3 (15) 21.0
 
Oct. 23, 2021, 3 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 23.0 ppb (22) 0.01 ppb (0) N/A 4.1 μg/m3 (18) 22.0
 
Oct. 23, 2021, 2 p.m. N/A 0.1 ppb (1) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.01 ppb (0) N/A 3.6 μg/m3 (16) 21.0
 
Oct. 23, 2021, 1 p.m. N/A 0.1 ppb (1) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 24.0 ppb (23) 0.0 ppb (0) N/A 3.0 μg/m3 (13) 23.0
 
Oct. 23, 2021, noon N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.0 ppb (0) N/A 2.8 μg/m3 (12) 17.0
 
Oct. 23, 2021, 11 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 16.0 ppb (15) 0.0 ppb (0) N/A 2.8 μg/m3 (12) 15.0
 
Oct. 23, 2021, 10 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 17.0
 
Oct. 23, 2021, 9 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 18.0 ppb (17) 0.0 ppb (0) N/A 2.9 μg/m3 (13) 17.0
 
Oct. 23, 2021, 8 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) N/A N/A 3.2 μg/m3 (14) 18.0
 
Oct. 23, 2021, 7 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) N/A 19.0 ppb (18) 0.0 ppb (0) N/A 3.9 μg/m3 (17) 18.0
 
Oct. 23, 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 0.01 ppb (0) N/A 4.2 μg/m3 (18) 18.0
 
Oct. 23, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.0 ppb (0) N/A 3.8 μg/m3 (16) 18.0
 
Oct. 23, 2021, 4 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 20.0 ppb (19) 0.0 ppb (0) N/A 3.2 μg/m3 (14) 19.0
 
Oct. 23, 2021, 3 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 21.0 ppb (20) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 20.0
 
Oct. 23, 2021, 2 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 21.0
 
Oct. 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) 22.0 ppb (21) 0.0 ppb (0) N/A 2.8 μg/m3 (12) 21.0
 
Oct. 23, 2021, midnight N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 22.0 ppb (21) 0.0 ppb (0) N/A 2.7 μg/m3 (12) 21.0
 
Oct. 22, 2021, 11 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 20.0 ppb (19) 0.0 ppb (0) N/A 3.0 μg/m3 (13) 19.0
 
Oct. 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) 18.0 ppb (17) N/A N/A 3.5 μg/m3 (15) 17.0
 
Oct. 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) 16.0 ppb (15) N/A N/A 3.3 μg/m3 (14) 15.0
 
Oct. 22, 2021, 8 p.m. N/A 0.1 ppb (1) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 19.0 ppb (18) N/A N/A 2.9 μg/m3 (13) 18.0
 
Oct. 22, 2021, 7 p.m. N/A 0.1 ppb (1) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 17.0 ppb (16) N/A N/A 2.3 μg/m3 (10) 16.0
 
Oct. 22, 2021, 6 p.m. N/A 0.1 ppb (1) 0.6 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 18.0 ppb (17) N/A N/A 2.0 μg/m3 (9) 17.0
 
Oct. 22, 2021, 5 p.m. N/A 0.1 ppb (1) 0.5 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 15.0 ppb (14) N/A N/A 1.5 μg/m3 (7) 14.0
 
Oct. 22, 2021, 4 p.m. N/A 0.1 ppb (1) 0.4 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 13.0 ppb (13) 0.0 ppb (0) N/A 0.8 μg/m3 (4) 13.0
 
Oct. 22, 2021, 3 p.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 11.0 ppb (11) 0.0 ppb (0) N/A 0.7 μg/m3 (3) 11.0
 
Oct. 22, 2021, 2 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 16.0 ppb (15) 0.01 ppb (0) N/A 2.1 μg/m3 (9) 15.0
 
Oct. 22, 2021, 1 p.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.01 ppb (0) N/A 6.1 μg/m3 (26) 34.0
 
Oct. 22, 2021, noon N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 40.0 ppb (38) 0.02 ppb (0) N/A 6.4 μg/m3 (27) 38.0
 
Oct. 22, 2021, 11 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 43.0 ppb (40) 0.02 ppb (0) N/A 6.6 μg/m3 (28) 40.0
 
Oct. 22, 2021, 10 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.02 ppb (0) N/A 6.7 μg/m3 (28) 44.0
 
Oct. 22, 2021, 9 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.01 ppb (0) N/A 5.1 μg/m3 (22) 47.0
 
Oct. 22, 2021, 8 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 51.0 ppb (48) N/A N/A 6.0 μg/m3 (25) 48.0
 
Oct. 22, 2021, 7 a.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) N/A 48.0 ppb (45) 0.02 ppb (0) N/A 7.1 μg/m3 (30) 45.0
 
Oct. 22, 2021, 6 a.m. N/A 0.0 ppb (0) 1.6 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) N/A 0.03 ppb (0) N/A 7.7 μg/m3 (33) 33.0
 
Oct. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (46) 0.03 ppb (0) N/A 7.8 μg/m3 (33) 46.0
 
Oct. 22, 2021, 4 a.m. N/A -0.1 ppb (0) 1.6 ppb (2) N/A 1.7 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.03 ppb (0) N/A 7.7 μg/m3 (33) 47.0
 
Oct. 22, 2021, 3 a.m. N/A 0.0 ppb (0) 1.7 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 48.0 ppb (45) 0.03 ppb (0) N/A 7.7 μg/m3 (33) 45.0
 
Oct. 22, 2021, 2 a.m. N/A 0.0 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) 1.0 ppb (2) 55.0 ppb (51) 0.01 ppb (0) N/A 7.5 μg/m3 (32) 51.0
 
Oct. 22, 2021, 1 a.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.02 ppb (0) N/A 7.4 μg/m3 (31) 47.0
 
Oct. 22, 2021, midnight N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 48.0 ppb (45) 0.01 ppb (0) N/A 7.3 μg/m3 (31) 45.0
 
Oct. 21, 2021, 11 p.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 50.0 ppb (47) 0.01 ppb (0) N/A 7.2 μg/m3 (31) 47.0
 
Oct. 21, 2021, 10 p.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 47.0 ppb (44) 0.01 ppb (0) N/A 7.5 μg/m3 (32) 44.0
 
Oct. 21, 2021, 9 p.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.02 ppb (0) N/A 7.4 μg/m3 (31) 42.0
 
Oct. 21, 2021, 8 p.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.03 ppb (0) N/A 7.5 μg/m3 (32) 43.0
 
Oct. 21, 2021, 7 p.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 46.0 ppb (43) 0.03 ppb (0) N/A 7.3 μg/m3 (31) 43.0
 
Oct. 21, 2021, 6 p.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 51.0 ppb (48) 0.02 ppb (0) N/A 6.3 μg/m3 (27) 48.0
 
Oct. 21, 2021, 5 p.m. N/A 0.0 ppb (0) 1.8 ppb (2) N/A 1.8 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.02 ppb (0) N/A 7.3 μg/m3 (31) 41.0
 
Oct. 21, 2021, 4 p.m. N/A 0.0 ppb (0) 2.0 ppb (2) N/A 2.0 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.03 ppb (0) N/A 8.1 μg/m3 (34) 39.0
 
Oct. 21, 2021, 3 p.m. N/A 0.0 ppb (0) 2.1 ppb (2) N/A 2.1 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.03 ppb (0) N/A 8.5 μg/m3 (36) 39.0
 
Oct. 21, 2021, 2 p.m. N/A 0.0 ppb (0) 2.3 ppb (3) N/A 2.2 ppb (3) 0.0 ppb (0) 42.0 ppb (39) 0.03 ppb (0) N/A 8.3 μg/m3 (35) 39.0
 
Oct. 21, 2021, 1 p.m. N/A 0.1 ppb (1) 2.2 ppb (3) N/A 2.1 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.03 ppb (0) N/A 8.1 μg/m3 (34) 39.0
 
Oct. 21, 2021, noon N/A 0.0 ppb (0) 2.2 ppb (3) N/A 2.1 ppb (2) 0.0 ppb (0) 40.0 ppb (38) 0.02 ppb (0) N/A 8.2 μg/m3 (35) 38.0
 
Oct. 21, 2021, 11 a.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.02 ppb (0) N/A 8.2 μg/m3 (35) 36.0
 
Oct. 21, 2021, 10 a.m. N/A 0.0 ppb (0) 1.6 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.02 ppb (0) N/A 8.2 μg/m3 (35) 39.0
 
Oct. 21, 2021, 9 a.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) 41.0 ppb (38) 0.02 ppb (0) N/A 7.8 μg/m3 (33) 38.0
 
Oct. 21, 2021, 8 a.m. N/A 0.0 ppb (0) 1.6 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) 41.0 ppb (38) N/A N/A 7.4 μg/m3 (31) 38.0
 
Oct. 21, 2021, 7 a.m. N/A 0.0 ppb (0) 1.6 ppb (2) N/A 1.6 ppb (2) N/A 42.0 ppb (39) 0.01 ppb (0) N/A 7.2 μg/m3 (31) 39.0
 
Oct. 21, 2021, 6 a.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) N/A 0.01 ppb (0) N/A 6.8 μg/m3 (29) 29.0
 
Oct. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) 0.01 ppb (0) N/A 6.6 μg/m3 (28) 41.0
 
Oct. 21, 2021, 4 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.5 ppb (2) 0.0 ppb (0) 43.0 ppb (40) 0.01 ppb (0) N/A 6.2 μg/m3 (26) 40.0
 
Oct. 21, 2021, 3 a.m. N/A 0.0 ppb (0) 1.5 ppb (2) N/A 1.6 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.01 ppb (0) N/A 6.2 μg/m3 (26) 41.0
 
Oct. 21, 2021, 2 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 40.0 ppb (38) 0.01 ppb (0) N/A 5.9 μg/m3 (25) 38.0
 
Oct. 21, 2021, 1 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.0 ppb (0) N/A 6.0 μg/m3 (25) 33.0
 
Oct. 21, 2021, midnight N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
Oct. 20, 2021, 11 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 30.0 ppb (28) N/A N/A 5.9 μg/m3 (25) 28.0
 
Oct. 20, 2021, 10 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) N/A N/A 5.6 μg/m3 (24) 26.0
 
Oct. 20, 2021, 9 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 32.0 ppb (30) N/A N/A 5.5 μg/m3 (23) 30.0
 
Oct. 20, 2021, 8 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) N/A 35.0 ppb (33) N/A N/A 5.3 μg/m3 (23) 33.0
 
Oct. 20, 2021, 7 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) N/A N/A N/A N/A N/A 1.0
 
Oct. 20, 2021, 6 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) N/A N/A N/A N/A 1.0
 
Oct. 20, 2021, 5 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) N/A N/A N/A 5.1 μg/m3 (22) 22.0
 
Oct. 20, 2021, 4 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) N/A N/A N/A 4.8 μg/m3 (20) 20.0
 
Oct. 20, 2021, 3 p.m. N/A 0.1 ppb (1) 1.1 ppb (2) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A N/A 5.3 μg/m3 (23) 23.0
 
Oct. 20, 2021, 2 p.m. N/A 0.1 ppb (1) 1.3 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.4 μg/m3 (23) 29.0
 
Oct. 20, 2021, 1 p.m. N/A 0.1 ppb (1) 1.3 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 30.0 ppb (28) N/A N/A 5.4 μg/m3 (23) 28.0
 
Oct. 20, 2021, noon N/A 0.1 ppb (1) 1.3 ppb (2) N/A 1.2 ppb (2) 0.0 ppb (0) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Oct. 20, 2021, 11 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 23.0 ppb (22) N/A N/A 5.3 μg/m3 (23) 23.0
 
Oct. 20, 2021, 10 a.m. N/A 0.0 ppb (0) 1.4 ppb (2) N/A 1.4 ppb (2) 0.0 ppb (0) 25.0 ppb (24) N/A N/A 5.0 μg/m3 (21) 24.0
 
Oct. 20, 2021, 9 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 25.0 ppb (24) N/A N/A 4.9 μg/m3 (21) 24.0
 
Oct. 20, 2021, 8 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 0.0 ppb (0) 29.0 ppb (27) N/A N/A 4.6 μg/m3 (20) 27.0
 
Oct. 20, 2021, 7 a.m. N/A 0.0 ppb (0) 1.2 ppb (2) N/A 1.2 ppb (2) N/A 29.0 ppb (27) N/A N/A 4.6 μg/m3 (20) 27.0
 
Oct. 20, 2021, 6 a.m. N/A 0.0 ppb (0) 1.3 ppb (2) N/A 1.3 ppb (2) 0.0 ppb (0) N/A N/A N/A 4.5 μg/m3 (19) 19.0
 
Oct. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
Oct. 20, 2021, 4 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A 0.9 ppb (1) 0.0 ppb (0) 21.0 ppb (20) N/A N/A 4.8 μg/m3 (20) 20.0
 
Oct. 20, 2021, 3 a.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 19.0 ppb (18) N/A N/A 3.9 μg/m3 (17) 18.0
 
Oct. 20, 2021, 2 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 21.0 ppb (20) N/A N/A 4.0 μg/m3 (17) 20.0
 
Oct. 20, 2021, 1 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) N/A N/A 3.9 μg/m3 (17) 19.0
 
Oct. 20, 2021, midnight N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 25.0 ppb (24) N/A N/A 3.6 μg/m3 (16) 24.0
 
Oct. 19, 2021, 11 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) N/A N/A 3.2 μg/m3 (14) 24.0
 
Oct. 19, 2021, 10 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.7 ppb (1) 0.0 ppb (0) 23.0 ppb (22) N/A N/A 3.6 μg/m3 (16) 22.0
 
Oct. 19, 2021, 9 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 24.0 ppb (23) N/A N/A 2.7 μg/m3 (12) 23.0
 
Oct. 19, 2021, 8 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 23.0 ppb (22) N/A N/A 2.9 μg/m3 (13) 22.0
 
Oct. 19, 2021, 7 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) N/A N/A N/A 2.8 μg/m3 (12) 12.0
 
Oct. 19, 2021, 6 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) N/A N/A N/A 2.2 μg/m3 (10) 10.0
 
Oct. 19, 2021, 5 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) N/A N/A N/A 2.5 μg/m3 (11) 11.0
 
Oct. 19, 2021, 4 p.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 19, 2021, 3 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) N/A N/A N/A 2.2 μg/m3 (10) 10.0
 
Oct. 19, 2021, 2 p.m. N/A 0.1 ppb (1) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 27.0 ppb (25) N/A N/A 2.4 μg/m3 (10) 25.0
 
Oct. 19, 2021, 1 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) N/A N/A 2.7 μg/m3 (12) 22.0
 
Oct. 19, 2021, noon N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 21.0 ppb (20) N/A N/A 3.1 μg/m3 (13) 20.0
 
Oct. 19, 2021, 11 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) N/A N/A 3.2 μg/m3 (14) 20.0
 
Oct. 19, 2021, 10 a.m. N/A 0.0 ppb (0) 0.1 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) 21.0 ppb (20) N/A N/A 2.3 μg/m3 (10) 20.0
 
Oct. 19, 2021, 9 a.m. N/A 0.0 ppb (0) 0.1 ppb (1) N/A 0.1 ppb (1) 0.0 ppb (0) 21.0 ppb (20) N/A N/A 1.9 μg/m3 (8) 20.0
 
Oct. 19, 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 2.2 μg/m3 (10) 18.0
 
Oct. 19, 2021, 7 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) N/A 17.0 ppb (16) N/A N/A 1.6 μg/m3 (7) 16.0
 
Oct. 19, 2021, 6 a.m. N/A 0.0 ppb (0) 0.2 ppb (1) N/A 0.2 ppb (1) 0.0 ppb (0) N/A N/A N/A 1.5 μg/m3 (7) 7.0
 
Oct. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (13) N/A N/A 1.6 μg/m3 (7) 13.0
 
Oct. 19, 2021, 4 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 1.5 μg/m3 (7) 11.0
 
Oct. 19, 2021, 3 a.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 1.4 μg/m3 (6) 11.0
 
Oct. 19, 2021, 2 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.5 ppb (1) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 1.5 μg/m3 (7) 11.0
 
Oct. 19, 2021, 1 a.m. N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 1.6 μg/m3 (7) 11.0
 
Oct. 19, 2021, midnight N/A 0.0 ppb (0) 0.4 ppb (1) N/A 0.4 ppb (1) 0.0 ppb (0) 11.0 ppb (11) N/A N/A 2.0 μg/m3 (9) 11.0
 
Oct. 18, 2021, 11 p.m. N/A -0.1 ppb (0) 0.2 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 12.0 ppb (12) N/A N/A 1.5 μg/m3 (7) 12.0
 
Oct. 18, 2021, 10 p.m. N/A 0.0 ppb (0) 0.3 ppb (1) N/A 0.3 ppb (1) 0.0 ppb (0) 12.0 ppb (12) N/A N/A 1.6 μg/m3 (7) 12.0
 
Oct. 18, 2021, 9 p.m. N/A 0.0 ppb (0) 0.5 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 13.0 ppb (13) N/A N/A 1.0 μg/m3 (5) 13.0
 
Oct. 18, 2021, 8 p.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) N/A N/A 1.2 μg/m3 (5) 12.0
 
Oct. 18, 2021, 7 p.m. N/A 0.1 ppb (1) 0.8 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 12.0 ppb (12) N/A N/A 0.9 μg/m3 (4) 12.0
 
Oct. 18, 2021, 6 p.m. N/A 0.2 ppb (1) 1.0 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
Oct. 18, 2021, 5 p.m. N/A 0.1 ppb (1) 0.7 ppb (1) N/A 0.6 ppb (1) 0.0 ppb (0) 14.0 ppb (13) N/A N/A 1.1 μg/m3 (5) 13.0
 
Oct. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (13) N/A N/A 1.8 μg/m3 (8) 13.0
 
Oct. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (13) 0.04 ppb (0) N/A 1.7 μg/m3 (8) 13.0
 
Oct. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (14) 0.04 ppb (0) N/A 1.6 μg/m3 (7) 14.0
 
Oct. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Oct. 16, 2021, 11 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 30.0 ppb (28) 0.06 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
Oct. 16, 2021, 10 a.m. N/A 0.0 ppb (0) 1.1 ppb (2) N/A 1.1 ppb (2) 0.0 ppb (0) 26.0 ppb (25) 0.06 ppb (2) N/A 9.4 μg/m3 (40) 40.0
 
Oct. 16, 2021, 9 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A 0.8 ppb (1) 0.0 ppb (0) 25.0 ppb (24) 0.05 ppb (2) N/A 6.9 μg/m3 (29) 29.0