ID: 1295

AQSQID: 000090222

Site Name: Calgary Northwest

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

Updated: Feb. 26, 2021, 2:32 p.m.

Location: Calgary (Varsity Acres), CC

Reporting: True, Located: True

Current AQI: 27.0

Calgary (Varsity Acres) CC, CA: 51.0814, -114.1403

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 26, 2021, noon N/A N/A N/A 13.0 ppb (13) N/A N/A 29.0 ppb (27) 0.33 ppb (4) N/A 1.2 μg/m3 (5) 27.0
 
Feb. 26, 2021, 11 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 32.0 ppb (30) 0.32 ppb (4) N/A 1.0 μg/m3 (5) 30.0
 
Feb. 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Feb. 26, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.3 ppb (4) N/A 0.9 μg/m3 (4) 37.0
 
Feb. 26, 2021, 8 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 1.0 μg/m3 (5) 35.0
 
Feb. 26, 2021, 7 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) 0.31 ppb (4) N/A 1.3 μg/m3 (6) 32.0
 
Feb. 26, 2021, 6 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 1.3 μg/m3 (6) 35.0
 
Feb. 26, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 1.4 μg/m3 (6) 35.0
 
Feb. 26, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 1.7 μg/m3 (8) 35.0
 
Feb. 26, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 40.0 ppb (38) 0.3 ppb (4) N/A 1.5 μg/m3 (7) 38.0
 
Feb. 26, 2021, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.3 ppb (4) N/A 1.5 μg/m3 (7) 40.0
 
Feb. 26, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.29 ppb (4) N/A 1.5 μg/m3 (7) 40.0
 
Feb. 26, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.29 ppb (4) N/A 1.5 μg/m3 (7) 40.0
 
Feb. 25, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.29 ppb (4) N/A 1.6 μg/m3 (7) 41.0
 
Feb. 25, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) 0.29 ppb (4) N/A 1.5 μg/m3 (7) 42.0
 
Feb. 25, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.28 ppb (4) N/A 1.4 μg/m3 (6) 43.0
 
Feb. 25, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.28 ppb (4) N/A 1.5 μg/m3 (7) 43.0
 
Feb. 25, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.28 ppb (4) N/A 1.5 μg/m3 (7) 43.0
 
Feb. 25, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.29 ppb (4) N/A 1.8 μg/m3 (8) 43.0
 
Feb. 25, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.28 ppb (4) N/A 1.6 μg/m3 (7) 42.0
 
Feb. 25, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.28 ppb (4) N/A 1.5 μg/m3 (7) 42.0
 
Feb. 25, 2021, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) 0.3 ppb (4) N/A 1.8 μg/m3 (8) 39.0
 
Feb. 25, 2021, 2 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 36.0 ppb (34) 0.32 ppb (4) N/A 2.6 μg/m3 (11) 34.0
 
Feb. 25, 2021, 1 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) 0.29 ppb (4) N/A 2.0 μg/m3 (9) 37.0
 
Feb. 25, 2021, noon N/A N/A N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.28 ppb (4) N/A 1.7 μg/m3 (8) 38.0
 
Feb. 25, 2021, 11 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 34.0 ppb (32) 0.3 ppb (4) N/A 1.7 μg/m3 (8) 32.0
 
Feb. 25, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
Feb. 25, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) 0.27 ppb (4) N/A 1.3 μg/m3 (6) 43.0
 
Feb. 25, 2021, 8 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 43.0 ppb (40) 0.28 ppb (4) N/A 1.2 μg/m3 (5) 40.0
 
Feb. 25, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.28 ppb (4) N/A 1.3 μg/m3 (6) 38.0
 
Feb. 25, 2021, 6 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 43.0 ppb (40) 0.27 ppb (4) N/A 1.3 μg/m3 (6) 40.0
 
Feb. 25, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 40.0 ppb (38) 0.29 ppb (4) N/A 1.7 μg/m3 (8) 38.0
 
Feb. 25, 2021, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 39.0 ppb (37) 0.29 ppb (4) N/A 1.6 μg/m3 (7) 37.0
 
Feb. 25, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) 0.29 ppb (4) N/A 1.5 μg/m3 (7) 39.0
 
Feb. 25, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.3 ppb (4) N/A 1.8 μg/m3 (8) 38.0
 
Feb. 25, 2021, 1 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 42.0 ppb (39) 0.29 ppb (4) N/A 2.5 μg/m3 (11) 39.0
 
Feb. 25, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.29 ppb (4) N/A 1.8 μg/m3 (8) 41.0
 
Feb. 24, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.28 ppb (4) N/A 1.6 μg/m3 (7) 43.0
 
Feb. 24, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) 0.29 ppb (4) N/A 1.5 μg/m3 (7) 43.0
 
Feb. 24, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.28 ppb (4) N/A 1.6 μg/m3 (7) 42.0
 
Feb. 24, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.29 ppb (4) N/A 1.9 μg/m3 (8) 42.0
 
Feb. 24, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.32 ppb (4) N/A 4.7 μg/m3 (20) 37.0
 
Feb. 24, 2021, 6 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.32 ppb (4) N/A 6.2 μg/m3 (26) 34.0
 
Feb. 24, 2021, 5 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 34.0 ppb (32) 0.31 ppb (4) N/A 6.4 μg/m3 (27) 32.0
 
Feb. 24, 2021, 4 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) 0.31 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 24, 2021, 3 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 25.0 ppb (24) 0.34 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Feb. 24, 2021, 2 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 18.0 ppb (17) 0.35 ppb (4) N/A 11.6 μg/m3 (49) 49.0
 
Feb. 24, 2021, 1 p.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 17.0 ppb (16) 0.33 ppb (4) N/A 14.2 μg/m3 (56) 56.0
 
Feb. 24, 2021, noon N/A N/A N/A 20.0 ppb (19) N/A N/A 18.0 ppb (17) 0.32 ppb (4) N/A 14.2 μg/m3 (56) 56.0
 
Feb. 24, 2021, 11 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 24.0 ppb (23) 0.31 ppb (4) N/A 8.5 μg/m3 (36) 36.0
 
Feb. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
Feb. 24, 2021, 9 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 35.0 ppb (33) 0.3 ppb (4) N/A 1.9 μg/m3 (8) 33.0
 
Feb. 24, 2021, 8 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) 0.31 ppb (4) N/A 1.9 μg/m3 (8) 32.0
 
Feb. 24, 2021, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 38.0 ppb (36) 0.31 ppb (4) N/A 1.8 μg/m3 (8) 36.0
 
Feb. 24, 2021, 6 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 38.0 ppb (36) 0.31 ppb (4) N/A 1.9 μg/m3 (8) 36.0
 
Feb. 24, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.31 ppb (4) N/A 2.3 μg/m3 (10) 37.0
 
Feb. 24, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.3 ppb (4) N/A 2.0 μg/m3 (9) 39.0
 
Feb. 24, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.3 ppb (4) N/A 1.9 μg/m3 (8) 40.0
 
Feb. 24, 2021, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.29 ppb (4) N/A 1.6 μg/m3 (7) 41.0
 
Feb. 24, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.3 ppb (4) N/A 1.8 μg/m3 (8) 41.0
 
Feb. 24, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.3 ppb (4) N/A 1.8 μg/m3 (8) 41.0
 
Feb. 23, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.3 ppb (4) N/A 2.0 μg/m3 (9) 42.0
 
Feb. 23, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 45.0 ppb (42) 0.3 ppb (4) N/A 1.8 μg/m3 (8) 42.0
 
Feb. 23, 2021, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 44.0 ppb (41) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 41.0
 
Feb. 23, 2021, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 44.0 ppb (41) 0.32 ppb (4) N/A 4.2 μg/m3 (18) 41.0
 
Feb. 23, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 43.0 ppb (40) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 40.0
 
Feb. 23, 2021, 6 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 41.0 ppb (38) 0.33 ppb (4) N/A 5.4 μg/m3 (23) 38.0
 
Feb. 23, 2021, 5 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) 0.36 ppb (5) N/A 5.7 μg/m3 (24) 35.0
 
Feb. 23, 2021, 4 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 26.0 ppb (25) 0.47 ppb (6) N/A 6.4 μg/m3 (27) 27.0
 
Feb. 23, 2021, 3 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 23.0 ppb (22) 0.5 ppb (6) N/A 5.1 μg/m3 (22) 23.0
 
Feb. 23, 2021, 2 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.31 ppb (4) N/A 2.5 μg/m3 (11) 38.0
 
Feb. 23, 2021, 1 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 41.0 ppb (38) 0.31 ppb (4) N/A 2.5 μg/m3 (11) 38.0
 
Feb. 23, 2021, noon N/A N/A N/A 11.0 ppb (11) N/A N/A 32.0 ppb (30) 0.31 ppb (4) N/A 2.5 μg/m3 (11) 30.0
 
Feb. 23, 2021, 11 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 37.0 ppb (35) 0.29 ppb (4) N/A 2.2 μg/m3 (10) 35.0
 
Feb. 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Feb. 23, 2021, 9 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 40.0 ppb (38) 0.28 ppb (4) N/A 2.2 μg/m3 (10) 38.0
 
Feb. 23, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 38.0 ppb (36) 0.29 ppb (4) N/A 2.3 μg/m3 (10) 36.0
 
Feb. 23, 2021, 7 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 36.0 ppb (34) 0.29 ppb (4) N/A 2.6 μg/m3 (11) 34.0
 
Feb. 23, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.29 ppb (4) N/A 2.7 μg/m3 (12) 40.0
 
Feb. 23, 2021, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.28 ppb (4) N/A 2.1 μg/m3 (9) 41.0
 
Feb. 23, 2021, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.27 ppb (4) N/A 1.8 μg/m3 (8) 42.0
 
Feb. 23, 2021, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 41.0 ppb (38) 0.29 ppb (4) N/A 2.6 μg/m3 (11) 38.0
 
Feb. 23, 2021, 2 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 27.0 ppb (25) 0.37 ppb (5) N/A 5.2 μg/m3 (22) 25.0
 
Feb. 23, 2021, 1 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 35.0 ppb (33) 0.32 ppb (4) N/A 3.3 μg/m3 (14) 33.0
 
Feb. 23, 2021, midnight N/A N/A N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) 0.31 ppb (4) N/A 3.0 μg/m3 (13) 35.0
 
Feb. 22, 2021, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.28 ppb (4) N/A 2.2 μg/m3 (10) 41.0
 
Feb. 22, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.26 ppb (4) N/A 1.9 μg/m3 (8) 43.0
 
Feb. 22, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.26 ppb (4) N/A 1.7 μg/m3 (8) 43.0
 
Feb. 22, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.26 ppb (4) N/A 1.8 μg/m3 (8) 42.0
 
Feb. 22, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.26 ppb (4) N/A 1.7 μg/m3 (8) 43.0
 
Feb. 22, 2021, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.29 ppb (4) N/A 2.5 μg/m3 (11) 39.0
 
Feb. 22, 2021, 5 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 28.0 ppb (26) 0.42 ppb (5) N/A 9.6 μg/m3 (40) 40.0
 
Feb. 22, 2021, 4 p.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 33.0 ppb (31) 0.35 ppb (4) N/A 6.3 μg/m3 (27) 31.0
 
Feb. 22, 2021, 3 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) 0.32 ppb (4) N/A 3.7 μg/m3 (16) 32.0
 
Feb. 22, 2021, 2 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.29 ppb (4) N/A 2.3 μg/m3 (10) 34.0
 
Feb. 22, 2021, 1 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 29.0 ppb (27) 0.28 ppb (4) N/A 1.3 μg/m3 (6) 27.0
 
Feb. 22, 2021, noon N/A N/A N/A 7.0 ppb (7) N/A N/A 36.0 ppb (34) 0.26 ppb (4) N/A 1.2 μg/m3 (5) 34.0
 
Feb. 22, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.27 ppb (4) N/A 1.0 μg/m3 (5) 38.0
 
Feb. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
Feb. 22, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.26 ppb (4) N/A 1.1 μg/m3 (5) 38.0
 
Feb. 22, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.25 ppb (3) N/A 1.1 μg/m3 (5) 40.0
 
Feb. 22, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) 0.25 ppb (3) N/A 1.1 μg/m3 (5) 41.0
 
Feb. 22, 2021, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.25 ppb (3) N/A 1.2 μg/m3 (5) 40.0
 
Feb. 22, 2021, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.25 ppb (3) N/A 1.6 μg/m3 (7) 40.0
 
Feb. 22, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.25 ppb (3) N/A 1.5 μg/m3 (7) 40.0
 
Feb. 22, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 40.0 ppb (38) 0.27 ppb (4) N/A 2.9 μg/m3 (13) 38.0
 
Feb. 22, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.25 ppb (3) N/A 1.7 μg/m3 (8) 42.0
 
Feb. 22, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.26 ppb (4) N/A 2.1 μg/m3 (9) 41.0
 
Feb. 22, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.28 ppb (4) N/A 2.6 μg/m3 (11) 39.0
 
Feb. 21, 2021, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 41.0 ppb (38) 0.3 ppb (4) N/A 2.5 μg/m3 (11) 38.0
 
Feb. 21, 2021, 10 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.29 ppb (4) N/A 2.6 μg/m3 (11) 38.0
 
Feb. 21, 2021, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 43.0 ppb (40) 0.28 ppb (4) N/A 2.3 μg/m3 (10) 40.0
 
Feb. 21, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.26 ppb (4) N/A 1.8 μg/m3 (8) 41.0
 
Feb. 21, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.26 ppb (4) N/A 1.9 μg/m3 (8) 40.0
 
Feb. 21, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.26 ppb (4) N/A 1.8 μg/m3 (8) 38.0
 
Feb. 21, 2021, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.26 ppb (4) N/A 1.6 μg/m3 (7) 38.0
 
Feb. 21, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.24 ppb (3) N/A 1.4 μg/m3 (6) 41.0
 
Feb. 21, 2021, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.24 ppb (3) N/A 1.3 μg/m3 (6) 41.0
 
Feb. 21, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.24 ppb (3) N/A 1.4 μg/m3 (6) 41.0
 
Feb. 21, 2021, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.24 ppb (3) N/A 1.3 μg/m3 (6) 40.0
 
Feb. 21, 2021, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.23 ppb (3) N/A 1.4 μg/m3 (6) 41.0
 
Feb. 21, 2021, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.23 ppb (3) N/A 1.5 μg/m3 (7) 42.0
 
Feb. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Feb. 21, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.24 ppb (3) N/A 1.6 μg/m3 (7) 39.0
 
Feb. 21, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 39.0
 
Feb. 21, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 40.0
 
Feb. 21, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.24 ppb (3) N/A 1.8 μg/m3 (8) 40.0
 
Feb. 21, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 40.0
 
Feb. 21, 2021, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.9 μg/m3 (8) 40.0
 
Feb. 21, 2021, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.23 ppb (3) N/A 1.9 μg/m3 (8) 39.0
 
Feb. 21, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.24 ppb (3) N/A 2.6 μg/m3 (11) 37.0
 
Feb. 21, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.24 ppb (3) N/A 2.7 μg/m3 (12) 38.0
 
Feb. 21, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.24 ppb (3) N/A 2.3 μg/m3 (10) 39.0
 
Feb. 20, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 4.3 μg/m3 (18) 40.0
 
Feb. 20, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 40.0
 
Feb. 20, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.6 μg/m3 (7) 40.0
 
Feb. 20, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.6 μg/m3 (7) 40.0
 
Feb. 20, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 40.0
 
Feb. 20, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 39.0
 
Feb. 20, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.24 ppb (3) N/A 1.9 μg/m3 (8) 38.0
 
Feb. 20, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 37.0 ppb (35) 0.25 ppb (3) N/A 2.2 μg/m3 (10) 35.0
 
Feb. 20, 2021, 3 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 35.0 ppb (33) 0.25 ppb (3) N/A 2.0 μg/m3 (9) 33.0
 
Feb. 20, 2021, 2 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 31.0 ppb (29) 0.24 ppb (3) N/A 1.5 μg/m3 (7) 29.0
 
Feb. 20, 2021, 1 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 36.0 ppb (34) 0.23 ppb (3) N/A 1.3 μg/m3 (6) 34.0
 
Feb. 20, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.22 ppb (3) N/A 1.1 μg/m3 (5) 38.0
 
Feb. 20, 2021, 11 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.22 ppb (3) N/A 1.0 μg/m3 (5) 40.0
 
Feb. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Feb. 20, 2021, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.21 ppb (3) N/A 1.1 μg/m3 (5) 39.0
 
Feb. 20, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.21 ppb (3) N/A 1.1 μg/m3 (5) 40.0
 
Feb. 20, 2021, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 39.0 ppb (37) 0.22 ppb (3) N/A 1.3 μg/m3 (6) 37.0
 
Feb. 20, 2021, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.22 ppb (3) N/A 1.6 μg/m3 (7) 39.0
 
Feb. 20, 2021, 5 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 37.0 ppb (35) 0.25 ppb (3) N/A 3.0 μg/m3 (13) 35.0
 
Feb. 20, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 39.0 ppb (37) 0.26 ppb (4) N/A 2.2 μg/m3 (10) 37.0
 
Feb. 20, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (39) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 39.0
 
Feb. 20, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.23 ppb (3) N/A 2.3 μg/m3 (10) 38.0
 
Feb. 20, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 2.2 μg/m3 (10) 40.0
 
Feb. 20, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 40.0
 
Feb. 19, 2021, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.24 ppb (3) N/A 1.7 μg/m3 (8) 40.0
 
Feb. 19, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.25 ppb (3) N/A 2.0 μg/m3 (9) 40.0
 
Feb. 19, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) 0.23 ppb (3) N/A 1.8 μg/m3 (8) 42.0
 
Feb. 19, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.23 ppb (3) N/A 4.4 μg/m3 (19) 41.0
 
Feb. 19, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 40.0
 
Feb. 19, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 40.0
 
Feb. 19, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.22 ppb (3) N/A 1.7 μg/m3 (8) 40.0
 
Feb. 19, 2021, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.23 ppb (3) N/A 1.6 μg/m3 (7) 40.0
 
Feb. 19, 2021, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (38) 0.22 ppb (3) N/A 1.8 μg/m3 (8) 38.0
 
Feb. 19, 2021, 2 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 37.0 ppb (35) 0.24 ppb (3) N/A 1.6 μg/m3 (7) 35.0
 
Feb. 19, 2021, 1 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 39.0 ppb (37) 0.23 ppb (3) N/A 1.7 μg/m3 (8) 37.0