ID: 30

AQSQID: 000051501

Site Name: Z‚Phirin

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

Updated: April 21, 2021, 6:45 p.m.

Location: Saint-Zéphirin-De-Courval (Rang Saint-Michel), CC

Reporting: True, Located: True

Current AQI: 26.0

Saint-Zéphirin-De-Courval (Rang Saint-Michel) CC, CA: 46.0419, -72.66

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.6 μg/m3 (11) 26.0
 
April 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.9 μg/m3 (13) 26.0
 
April 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.0 μg/m3 (13) 28.0
 
April 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.0 μg/m3 (13) 26.0
 
April 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
April 21, 2021, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
April 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.0 μg/m3 (13) 26.0
 
April 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
April 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 2.4 μg/m3 (10) 24.0
 
April 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
April 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
April 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.1 μg/m3 (13) 26.0
 
April 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.4 μg/m3 (15) 27.0
 
April 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
April 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.8 μg/m3 (12) 31.0
 
April 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.4 μg/m3 (10) 32.0
 
April 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.2 μg/m3 (10) 33.0
 
April 21, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.6 μg/m3 (11) 34.0
 
April 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.2 μg/m3 (14) 35.0
 
April 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.3 μg/m3 (14) 34.0
 
April 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.2 μg/m3 (14) 33.0
 
April 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.5 μg/m3 (15) 33.0
 
April 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.5 μg/m3 (15) 34.0
 
April 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.4 μg/m3 (15) 35.0
 
April 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.4 μg/m3 (15) 36.0
 
April 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.4 μg/m3 (15) 33.0
 
April 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
April 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 1.8 μg/m3 (8) 35.0
 
April 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.5 μg/m3 (23) 32.0
 
April 20, 2021, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 6.5 μg/m3 (28) 29.0
 
April 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 6.2 μg/m3 (26) 28.0
 
April 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 6.3 μg/m3 (27) 27.0
 
April 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.8 μg/m3 (25) 27.0
 
April 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 5.1 μg/m3 (22) 25.0
 
April 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 4.7 μg/m3 (20) 21.0
 
April 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 4.3 μg/m3 (18) 22.0
 
April 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 4.3 μg/m3 (18) 23.0
 
April 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.5 μg/m3 (23) 23.0
 
April 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 5.9 μg/m3 (25) 25.0
 
April 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.5 μg/m3 (23) 23.0
 
April 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 20, 2021, midnight N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 4.8 μg/m3 (20) 23.0
 
April 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 5.2 μg/m3 (22) 24.0
 
April 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 4.2 μg/m3 (18) 32.0
 
April 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.9 μg/m3 (17) 31.0
 
April 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.2 μg/m3 (18) 30.0
 
April 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.7 μg/m3 (24) 37.0
 
April 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.5 μg/m3 (28) 36.0
 
April 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 19, 2021, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 6.8 μg/m3 (29) 29.0
 
April 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 7.3 μg/m3 (31) 31.0
 
April 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 5.5 μg/m3 (23) 23.0
 
April 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 5.1 μg/m3 (22) 30.0
 
April 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 5.0 μg/m3 (21) 30.0
 
April 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 5.2 μg/m3 (22) 28.0
 
April 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 4.7 μg/m3 (20) 29.0
 
April 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.5 μg/m3 (23) 32.0
 
April 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.7 μg/m3 (24) 33.0
 
April 19, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.7 μg/m3 (24) 33.0
 
April 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.8 μg/m3 (25) 34.0
 
April 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.1 μg/m3 (22) 38.0
 
April 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
April 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 6.5 μg/m3 (28) 38.0
 
April 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 9.6 μg/m3 (40) 40.0
 
April 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 8.2 μg/m3 (35) 37.0
 
April 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.0 μg/m3 (30) 37.0
 
April 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 6.6 μg/m3 (28) 35.0
 
April 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 6.5 μg/m3 (28) 34.0
 
April 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
April 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
April 18, 2021, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 6.7 μg/m3 (28) 30.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 9 a.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
 
April 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 6.4 μg/m3 (27) 27.0
 
April 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 6.2 μg/m3 (26) 28.0
 
April 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.9 μg/m3 (25) 29.0
 
April 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.3 μg/m3 (23) 29.0
 
April 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
April 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.5 μg/m3 (19) 30.0
 
April 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
April 18, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.9 μg/m3 (17) 30.0
 
April 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.7 μg/m3 (16) 32.0
 
April 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.9 μg/m3 (17) 34.0
 
April 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.2 μg/m3 (18) 36.0
 
April 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.8 μg/m3 (16) 37.0
 
April 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
April 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.2 μg/m3 (18) 37.0
 
April 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.2 μg/m3 (18) 36.0
 
April 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.6 μg/m3 (20) 36.0
 
April 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.7 μg/m3 (20) 36.0
 
April 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.4 μg/m3 (19) 34.0
 
April 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 4.3 μg/m3 (18) 32.0
 
April 17, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 4.5 μg/m3 (19) 29.0
 
April 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 4.1 μg/m3 (18) 26.0
 
April 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.5 μg/m3 (19) 25.0
 
April 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 5.3 μg/m3 (23) 26.0
 
April 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
April 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 7.4 μg/m3 (31) 31.0
 
April 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 6.6 μg/m3 (28) 28.0
 
April 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 6.4 μg/m3 (27) 27.0
 
April 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 17, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 6.5 μg/m3 (28) 31.0
 
April 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.6 μg/m3 (24) 33.0
 
April 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 6.1 μg/m3 (26) 33.0
 
April 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
April 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
April 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
April 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.5 μg/m3 (23) 34.0
 
April 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.9 μg/m3 (21) 35.0
 
April 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.1 μg/m3 (22) 34.0
 
April 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
April 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.9 μg/m3 (17) 37.0
 
April 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.8 μg/m3 (16) 36.0
 
April 16, 2021, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 5.3 μg/m3 (23) 24.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 5.1 μg/m3 (22) 22.0
 
April 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 5.0 μg/m3 (21) 23.0
 
April 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.9 μg/m3 (21) 25.0
 
April 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 4.8 μg/m3 (20) 24.0
 
April 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.9 μg/m3 (21) 25.0
 
April 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 5.0 μg/m3 (21) 24.0
 
April 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
April 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
April 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.2 μg/m3 (22) 33.0
 
April 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.1 μg/m3 (22) 33.0
 
April 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.4 μg/m3 (23) 29.0
 
April 16, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.1 μg/m3 (26) 27.0
 
April 15, 2021, 11 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
 
April 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.8 μg/m3 (29) 32.0
 
April 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 6.9 μg/m3 (29) 35.0
 
April 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 6.9 μg/m3 (29) 37.0
 
April 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 7.0 μg/m3 (30) 38.0
 
April 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 7.8 μg/m3 (33) 33.0
 
April 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.9 μg/m3 (29) 36.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 6.0 μg/m3 (25) 39.0
 
April 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 7.4 μg/m3 (31) 35.0
 
April 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 6.7 μg/m3 (28) 35.0
 
April 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 15, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 6.2 μg/m3 (26) 26.0
 
April 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 6.3 μg/m3 (27) 27.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 5.6 μg/m3 (24) 24.0
 
April 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 5.5 μg/m3 (23) 23.0
 
April 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.1 μg/m3 (22) 22.0
 
April 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 5.3 μg/m3 (23) 23.0
 
April 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.4 μg/m3 (23) 23.0
 
April 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 5.8 μg/m3 (25) 25.0
 
April 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 6.2 μg/m3 (26) 29.0
 
April 15, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.7 μg/m3 (24) 31.0
 
April 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 5.7 μg/m3 (24) 35.0
 
April 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 5.5 μg/m3 (23) 39.0
 
April 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 5.7 μg/m3 (24) 39.0
 
April 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 5.7 μg/m3 (24) 39.0
 
April 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 6.3 μg/m3 (27) 37.0
 
April 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 6.3 μg/m3 (27) 35.0