ID: 7881

AQSQID: 840040059999

Site Name: Grand Canyon Ozone Bench

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

Updated: Sept. 21, 2021, 4:06 p.m.

Location: Grand Cyn (Mather Point Amphitheater), AZ

Reporting: True, Located: True

Current AQI: 44.0

Grand Cyn (Mather Point Amphitheater) AZ, US: 36.060444, -112.107028

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A -3.6 μg/m3 (0) 44.0
 
Sept. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A -3.6 μg/m3 (0) 45.0
 
Sept. 21, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A -2.2 μg/m3 (0) 45.0
 
Sept. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A -3.0 μg/m3 (0) 46.0
 
Sept. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A -2.1 μg/m3 (0) 45.0
 
Sept. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A -0.9 μg/m3 (0) 45.0
 
Sept. 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.1 μg/m3 (9) 45.0
 
Sept. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 8.5 μg/m3 (36) 44.0
 
Sept. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 11.4 μg/m3 (48) 48.0
 
Sept. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 11.8 μg/m3 (50) 50.0
 
Sept. 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 13.1 μg/m3 (54) 54.0
 
Sept. 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 12.6 μg/m3 (53) 53.0
 
Sept. 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 15.6 μg/m3 (59) 59.0
 
Sept. 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 18.5 μg/m3 (65) 65.0
 
Sept. 21, 2021, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 18.8 μg/m3 (66) 66.0
 
Sept. 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 15.8 μg/m3 (59) 59.0
 
Sept. 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 16.1 μg/m3 (60) 60.0
 
Sept. 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 9.9 μg/m3 (42) 43.0
 
Sept. 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
Sept. 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 3.2 μg/m3 (14) 39.0
 
Sept. 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.0 μg/m3 (9) 39.0
 
Sept. 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
Sept. 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.4 μg/m3 (2) 38.0
 
Sept. 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 0.1 μg/m3 (1) 39.0
 
Sept. 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A -0.3 μg/m3 (0) 38.0
 
Sept. 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A -0.5 μg/m3 (0) 38.0
 
Sept. 20, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A -0.3 μg/m3 (0) 36.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A -0.5 μg/m3 (0) 38.0
 
Sept. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A -0.5 μg/m3 (0) 40.0
 
Sept. 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A -0.5 μg/m3 (0) 42.0
 
Sept. 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A -0.4 μg/m3 (0) 40.0
 
Sept. 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A -0.2 μg/m3 (0) 40.0
 
Sept. 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 0.1 μg/m3 (1) 39.0
 
Sept. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.2 μg/m3 (1) 38.0
 
Sept. 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.3 μg/m3 (2) 38.0
 
Sept. 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
Sept. 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.2 μg/m3 (5) 36.0
 
Sept. 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.8 μg/m3 (8) 37.0
 
Sept. 20, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.5 μg/m3 (11) 39.0
 
Sept. 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.5 μg/m3 (11) 39.0
 
Sept. 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.1 μg/m3 (9) 40.0
 
Sept. 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.7 μg/m3 (8) 40.0
 
Sept. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.7 μg/m3 (8) 38.0
 
Sept. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.7 μg/m3 (8) 38.0
 
Sept. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.3 μg/m3 (6) 37.0
 
Sept. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.3 μg/m3 (6) 37.0
 
Sept. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.5 μg/m3 (11) 35.0
 
Sept. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.1 μg/m3 (22) 31.0
 
Sept. 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 6.8 μg/m3 (29) 29.0
 
Sept. 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 7.1 μg/m3 (30) 30.0
 
Sept. 19, 2021, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 7.4 μg/m3 (31) 31.0
 
Sept. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.8 μg/m3 (29) 29.0
 
Sept. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 4.8 μg/m3 (20) 29.0
 
Sept. 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.7 μg/m3 (16) 29.0
 
Sept. 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.4 μg/m3 (10) 30.0
 
Sept. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 0.9 μg/m3 (4) 32.0
 
Sept. 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 0.1 μg/m3 (1) 32.0
 
Sept. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 0.1 μg/m3 (1) 30.0
 
Sept. 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 0.2 μg/m3 (1) 30.0
 
Sept. 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 0.6 μg/m3 (3) 29.0
 
Sept. 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 1.1 μg/m3 (5) 29.0
 
Sept. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 1.8 μg/m3 (8) 30.0
 
Sept. 19, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A -0.4 μg/m3 (0) 35.0
 
Sept. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A -1.5 μg/m3 (0) 36.0
 
Sept. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A -0.6 μg/m3 (0) 33.0
 
Sept. 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.3 μg/m3 (14) 32.0
 
Sept. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.5 μg/m3 (11) 31.0
 
Sept. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.5 μg/m3 (19) 39.0
 
Sept. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
Sept. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.1 μg/m3 (22) 41.0
 
Sept. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 7.2 μg/m3 (31) 42.0
 
Sept. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.1 μg/m3 (30) 40.0
 
Sept. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.4 μg/m3 (31) 37.0
 
Sept. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.4 μg/m3 (31) 37.0
 
Sept. 18, 2021, noon N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 7.3 μg/m3 (31) 38.0
 
Sept. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.5 μg/m3 (28) 41.0
 
Sept. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.8 μg/m3 (25) 43.0
 
Sept. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.9 μg/m3 (25) 43.0
 
Sept. 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
Sept. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.4 μg/m3 (27) 41.0
 
Sept. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 7.5 μg/m3 (32) 39.0
 
Sept. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.8 μg/m3 (33) 40.0
 
Sept. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.2 μg/m3 (26) 41.0
 
Sept. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0
 
Sept. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.7 μg/m3 (24) 40.0
 
Sept. 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 6.7 μg/m3 (28) 38.0
 
Sept. 18, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.6 μg/m3 (28) 41.0
 
Sept. 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.6 μg/m3 (28) 42.0
 
Sept. 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.7 μg/m3 (28) 42.0
 
Sept. 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.1 μg/m3 (26) 41.0
 
Sept. 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.3 μg/m3 (23) 41.0
 
Sept. 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 4.6 μg/m3 (20) 42.0
 
Sept. 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 4.2 μg/m3 (18) 42.0
 
Sept. 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 4.5 μg/m3 (19) 44.0
 
Sept. 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 4.2 μg/m3 (18) 44.0
 
Sept. 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 3.9 μg/m3 (17) 45.0
 
Sept. 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.2 μg/m3 (14) 46.0
 
Sept. 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.1 μg/m3 (13) 46.0
 
Sept. 17, 2021, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.4 μg/m3 (15) 46.0
 
Sept. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 3.5 μg/m3 (15) 48.0
 
Sept. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
Sept. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.0 μg/m3 (13) 46.0
 
Sept. 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.8 μg/m3 (12) 45.0
 
Sept. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 2.3 μg/m3 (10) 44.0
 
Sept. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.3 μg/m3 (14) 43.0
 
Sept. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.9 μg/m3 (13) 43.0
 
Sept. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.1 μg/m3 (13) 43.0
 
Sept. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 4.0 μg/m3 (17) 44.0
 
Sept. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.6 μg/m3 (20) 43.0
 
Sept. 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 5.0 μg/m3 (21) 45.0
 
Sept. 17, 2021, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.3 μg/m3 (27) 46.0
 
Sept. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 5.9 μg/m3 (25) 47.0
 
Sept. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 5.9 μg/m3 (25) 47.0
 
Sept. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 6.5 μg/m3 (28) 47.0
 
Sept. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.5 μg/m3 (28) 46.0
 
Sept. 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 6.0 μg/m3 (25) 47.0
 
Sept. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.1 μg/m3 (26) 46.0
 
Sept. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 5.4 μg/m3 (23) 48.0
 
Sept. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 4.8 μg/m3 (20) 49.0
 
Sept. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 4.9 μg/m3 (21) 49.0
 
Sept. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 6.0 μg/m3 (25) 44.0
 
Sept. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 5.7 μg/m3 (24) 44.0
 
Sept. 16, 2021, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.7 μg/m3 (28) 42.0
 
Sept. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.5 μg/m3 (28) 45.0
 
Sept. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.2 μg/m3 (26) 45.0
 
Sept. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 8.0 μg/m3 (34) 44.0
 
Sept. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 9.1 μg/m3 (38) 44.0
 
Sept. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 10.4 μg/m3 (44) 44.0
 
Sept. 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 11.4 μg/m3 (48) 48.0
 
Sept. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 12.4 μg/m3 (52) 52.0
 
Sept. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 14.4 μg/m3 (56) 56.0
 
Sept. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 15.9 μg/m3 (59) 59.0
 
Sept. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 17.8 μg/m3 (63) 63.0
 
Sept. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 13.9 μg/m3 (55) 55.0
 
Sept. 16, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 13.3 μg/m3 (54) 54.0
 
Sept. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 11.4 μg/m3 (48) 48.0
 
Sept. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 10.8 μg/m3 (46) 48.0
 
Sept. 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 12.6 μg/m3 (53) 53.0
 
Sept. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 13.3 μg/m3 (54) 54.0
 
Sept. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 13.4 μg/m3 (54) 54.0
 
Sept. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 13.2 μg/m3 (54) 54.0
 
Sept. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 13.4 μg/m3 (54) 54.0
 
Sept. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 13.5 μg/m3 (54) 54.0
 
Sept. 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 13.8 μg/m3 (55) 55.0
 
Sept. 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 14.4 μg/m3 (56) 56.0
 
Sept. 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, noon N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 14.5 μg/m3 (57) 57.0
 
Sept. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 13.3 μg/m3 (54) 55.0
 
Sept. 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 13.5 μg/m3 (54) 54.0
 
Sept. 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 13.6 μg/m3 (55) 55.0
 
Sept. 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 12.8 μg/m3 (53) 53.0
 
Sept. 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 11.2 μg/m3 (47) 47.0
 
Sept. 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 9.8 μg/m3 (41) 47.0
 
Sept. 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 10.5 μg/m3 (44) 47.0
 
Sept. 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 10.4 μg/m3 (44) 46.0
 
Sept. 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 10.3 μg/m3 (43) 46.0
 
Sept. 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 4.9 μg/m3 (21) 47.0
 
Sept. 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 5.9 μg/m3 (25) 49.0
 
Sept. 15, 2021, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 6.4 μg/m3 (27) 48.0
 
Sept. 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 7.1 μg/m3 (30) 46.0
 
Sept. 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 7.9 μg/m3 (33) 45.0
 
Sept. 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 9.0 μg/m3 (38) 45.0
 
Sept. 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A N/A 45.0
 
Sept. 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 7.6 μg/m3 (32) 45.0
 
Sept. 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 7.6 μg/m3 (32) 44.0
 
Sept. 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 7.7 μg/m3 (33) 43.0
 
Sept. 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.7 μg/m3 (28) 46.0
 
Sept. 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 7.9 μg/m3 (33) 46.0