ID: 84

AQSQID: 040058001

Site Name: Grand Canyon Np

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

Updated: Sept. 25, 2020, 6:39 a.m.

Location: Grand Cyn (Hermit Rd (W Rim Dr)), AZ

Reporting: True, Located: True

Current AQI: 37.0

Grand Cyn (Hermit Rd (W Rim Dr)) AZ, US: 36.055, -112.1531

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 25, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 25, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 25, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 25, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 25, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 25, 2020, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 24, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 24, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 24, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 24, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 24, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 24, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 24, 2020, noon N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 24, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 24, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 24, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 24, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 24, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 24, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 24, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 24, 2020, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 23, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 23, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 23, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 23, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 23, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 23, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 23, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 23, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 23, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A N/A 36.0
 
Sept. 23, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A N/A 34.0
 
Sept. 23, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A N/A 35.0
 
Sept. 23, 2020, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A N/A 35.0
 
Sept. 23, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 23, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 23, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A N/A 35.0
 
Sept. 23, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A N/A 34.0
 
Sept. 23, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A N/A 33.0
 
Sept. 23, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A N/A 33.0
 
Sept. 23, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A N/A 34.0
 
Sept. 23, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A N/A 35.0
 
Sept. 23, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A N/A 35.0
 
Sept. 23, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A N/A 36.0
 
Sept. 23, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 23, 2020, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 22, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 22, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 22, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 22, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 22, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 22, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 22, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A N/A 37.0
 
Sept. 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 22, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 22, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 22, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 22, 2020, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 21, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 21, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 21, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, noon N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 20, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A N/A 46.0
 
Sept. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A N/A 46.0
 
Sept. 20, 2020, noon N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 20, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 20, 2020, midnight N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 19, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 19, 2020, noon N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A N/A 48.0
 
Sept. 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A N/A N/A 48.0
 
Sept. 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 19, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
Sept. 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 19, 2020, midnight N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 18, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A N/A 44.0
 
Sept. 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 18, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A N/A 43.0
 
Sept. 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
Sept. 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 18, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 18, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 18, 2020, noon N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
Sept. 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 18, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
Sept. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
Sept. 18, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0