ID: 7881

AQSQID: 840040059999

Site Name: Grand Canyon Ozone Bench

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

Updated: April 10, 2021, 10:43 a.m.

Location: Grand Cyn (Mather Point Amphitheater), AZ

Reporting: True, Located: True

Current AQI: 41.0

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
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.2 μg/m3 (5) 41.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.1 μg/m3 (5) 40.0
 
April 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.1 μg/m3 (5) 40.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.3 μg/m3 (6) 40.0
 
April 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.5 μg/m3 (7) 39.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.9 μg/m3 (8) 39.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.7 μg/m3 (8) 39.0
 
April 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 38.0
 
April 10, 2021, 1 a.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
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.8 μg/m3 (8) 40.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.0 μg/m3 (9) 41.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.5 μg/m3 (11) 43.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.6 μg/m3 (11) 43.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.8 μg/m3 (12) 43.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.6 μg/m3 (11) 43.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.5 μg/m3 (11) 42.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.3 μg/m3 (10) 42.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.0 μg/m3 (9) 43.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 1.8 μg/m3 (8) 44.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 1.7 μg/m3 (8) 44.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.9 μg/m3 (8) 45.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.7 μg/m3 (8) 45.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.7 μg/m3 (8) 46.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.9 μg/m3 (8) 45.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.1 μg/m3 (9) 47.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.1 μg/m3 (9) 49.0
 
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 2.4 μg/m3 (10) 51.0
 
April 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 2.5 μg/m3 (11) 58.0
 
April 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 2.6 μg/m3 (11) 58.0
 
April 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 2.6 μg/m3 (11) 51.0
 
April 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.9 μg/m3 (13) 50.0
 
April 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.6 μg/m3 (16) 43.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.6 μg/m3 (16) 40.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.7 μg/m3 (16) 40.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 4.4 μg/m3 (19) 41.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.5 μg/m3 (11) 41.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.3 μg/m3 (10) 41.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.2 μg/m3 (10) 42.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.1 μg/m3 (9) 42.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.0 μg/m3 (9) 42.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 1.9 μg/m3 (8) 42.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.4 μg/m3 (10) 42.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 2.0 μg/m3 (9) 44.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.9 μg/m3 (8) 45.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.9 μg/m3 (8) 46.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.0 μg/m3 (9) 47.0
 
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.2 μg/m3 (10) 47.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.4 μg/m3 (10) 49.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.5 μg/m3 (11) 50.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.6 μg/m3 (11) 46.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.5 μg/m3 (11) 45.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.7 μg/m3 (12) 46.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.9 μg/m3 (13) 46.0
 
April 8, 2021, midnight 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
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.9 μg/m3 (13) 46.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.8 μg/m3 (12) 46.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.7 μg/m3 (12) 45.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.4 μg/m3 (10) 45.0
 
April 7, 2021, 7 p.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
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.0 μg/m3 (9) 45.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 2.0 μg/m3 (9) 44.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 1.8 μg/m3 (8) 47.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 1.5 μg/m3 (7) 49.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 1.2 μg/m3 (5) 50.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 1.1 μg/m3 (5) 58.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 1.2 μg/m3 (5) 58.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 1.2 μg/m3 (5) 61.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 1.2 μg/m3 (5) 61.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 1.3 μg/m3 (6) 58.0
 
April 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 1.4 μg/m3 (6) 58.0
 
April 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 1.4 μg/m3 (6) 58.0
 
April 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 1.5 μg/m3 (7) 61.0
 
April 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 1.6 μg/m3 (7) 65.0
 
April 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 1.7 μg/m3 (8) 71.0
 
April 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 1.9 μg/m3 (8) 78.0
 
April 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 2.1 μg/m3 (9) 78.0
 
April 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 2.5 μg/m3 (11) 71.0
 
April 7, 2021, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 2.5 μg/m3 (11) 55.0
 
April 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 2.6 μg/m3 (11) 55.0
 
April 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 2.8 μg/m3 (12) 61.0
 
April 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 2.8 μg/m3 (12) 55.0
 
April 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 4.4 μg/m3 (19) 55.0
 
April 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 6.3 μg/m3 (27) 55.0
 
April 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 5.1 μg/m3 (22) 50.0
 
April 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 5.1 μg/m3 (22) 47.0
 
April 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.9 μg/m3 (25) 46.0
 
April 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.3 μg/m3 (27) 45.0
 
April 6, 2021, 2 p.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
 
April 6, 2021, 1 p.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
 
April 6, 2021, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.0 μg/m3 (9) 43.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.3 μg/m3 (10) 42.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.4 μg/m3 (10) 42.0
 
April 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.6 μg/m3 (11) 43.0
 
April 6, 2021, 8 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
 
April 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 3.0 μg/m3 (13) 45.0
 
April 6, 2021, 6 a.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
 
April 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.7 μg/m3 (16) 46.0
 
April 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 4.4 μg/m3 (19) 48.0
 
April 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 4.8 μg/m3 (20) 48.0
 
April 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 4.5 μg/m3 (19) 49.0
 
April 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 3.8 μg/m3 (16) 50.0
 
April 6, 2021, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 3.6 μg/m3 (16) 50.0
 
April 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 3.5 μg/m3 (15) 50.0
 
April 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 3.4 μg/m3 (15) 50.0
 
April 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 3.0 μg/m3 (13) 49.0
 
April 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.8 μg/m3 (12) 50.0
 
April 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 2.7 μg/m3 (12) 50.0
 
April 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.5 μg/m3 (11) 50.0
 
April 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.4 μg/m3 (10) 49.0
 
April 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.3 μg/m3 (10) 47.0
 
April 5, 2021, 3 p.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
 
April 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.8 μg/m3 (8) 46.0
 
April 5, 2021, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.9 μg/m3 (8) 46.0
 
April 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.9 μg/m3 (8) 46.0
 
April 5, 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 (9) 45.0
 
April 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.6 μg/m3 (11) 47.0
 
April 5, 2021, 8 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
 
April 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.5 μg/m3 (11) 47.0
 
April 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.1 μg/m3 (9) 47.0
 
April 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.2 μg/m3 (10) 48.0
 
April 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.8 μg/m3 (12) 48.0
 
April 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 3.2 μg/m3 (14) 49.0
 
April 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.9 μg/m3 (13) 49.0
 
April 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.9 μg/m3 (13) 48.0
 
April 5, 2021, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.7 μg/m3 (12) 48.0
 
April 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.5 μg/m3 (11) 48.0
 
April 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.2 μg/m3 (10) 47.0
 
April 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.7 μg/m3 (12) 46.0
 
April 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.6 μg/m3 (11) 45.0
 
April 4, 2021, 7 p.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
 
April 4, 2021, 6 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 (16) 45.0
 
April 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 3.2 μg/m3 (14) 48.0
 
April 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.6 μg/m3 (11) 50.0
 
April 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.6 μg/m3 (11) 49.0
 
April 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.3 μg/m3 (10) 46.0
 
April 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.1 μg/m3 (9) 50.0
 
April 4, 2021, noon N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.1 μg/m3 (9) 48.0
 
April 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.2 μg/m3 (10) 49.0
 
April 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.2 μg/m3 (10) 50.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.2 μg/m3 (10) 50.0
 
April 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.3 μg/m3 (10) 48.0
 
April 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.5 μg/m3 (11) 47.0
 
April 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.6 μg/m3 (11) 46.0
 
April 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.9 μg/m3 (13) 47.0
 
April 4, 2021, 4 a.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
 
April 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 3.0 μg/m3 (13) 44.0
 
April 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.2 μg/m3 (14) 43.0
 
April 4, 2021, 1 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
 
April 4, 2021, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 2.6 μg/m3 (11) 44.0
 
April 3, 2021, 11 p.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
 
April 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.1 μg/m3 (9) 43.0
 
April 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 1.9 μg/m3 (8) 42.0
 
April 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.8 μg/m3 (8) 41.0
 
April 3, 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
 
April 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 1.8 μg/m3 (8) 37.0
 
April 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 1.7 μg/m3 (8) 39.0
 
April 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.9 μg/m3 (8) 40.0
 
April 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.5 μg/m3 (7) 41.0
 
April 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 1.3 μg/m3 (6) 42.0
 
April 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 1.3 μg/m3 (6) 44.0
 
April 3, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.1 μg/m3 (5) 45.0
 
April 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.3 μg/m3 (6) 45.0
 
April 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.3 μg/m3 (6) 46.0