AQSQID: 000090222

Site Name: Calgary Northwest

Location: Calgary (Varsity Acres), CC

Reporting: True, Located: True

Current AQI: 22.0

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. 14, 2020, 6 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.33 ppb (4) N/A 2.7 μg/m3 (11) 18.0
 
Feb. 14, 2020, 5 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A 28.0 ppb (22) 0.27 ppb (3) N/A 2.5 μg/m3 (10) 22.0
 
Feb. 14, 2020, 4 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.28 ppb (3) N/A 3.1 μg/m3 (13) 22.0
 
Feb. 14, 2020, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 2.7 μg/m3 (11) 27.0
 
Feb. 14, 2020, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.25 ppb (3) N/A 2.3 μg/m3 (10) 29.0
 
Feb. 13, 2020, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.25 ppb (3) N/A 2.4 μg/m3 (10) 27.0
 
Feb. 13, 2020, 10 p.m. N/A N/A N/A 23.0 ppb (21) N/A N/A 7.0 ppb (5) 0.54 ppb (6) N/A 17.8 μg/m3 (62) 62.0
 
Feb. 13, 2020, 9 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 10.0 ppb (8) 0.56 ppb (6) N/A 19.0 μg/m3 (65) 65.0
 
Feb. 13, 2020, 8 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 7.0 ppb (5) 0.46 ppb (5) N/A 14.7 μg/m3 (56) 56.0
 
Feb. 13, 2020, 7 p.m. N/A N/A N/A 23.0 ppb (21) N/A N/A 9.0 ppb (7) 0.5 ppb (6) N/A 16.9 μg/m3 (60) 60.0
 
Feb. 13, 2020, 6 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 12.0 ppb (9) 0.36 ppb (4) N/A 11.7 μg/m3 (49) 49.0
 
Feb. 13, 2020, 5 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 3.0 ppb (2) 0.42 ppb (5) N/A 16.3 μg/m3 (59) 59.0
 
Feb. 13, 2020, 4 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.49 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
Feb. 13, 2020, 3 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.45 ppb (5) N/A 13.3 μg/m3 (53) 53.0
 
Feb. 13, 2020, 2 p.m. N/A N/A N/A 25.0 ppb (23) N/A N/A 7.0 ppb (5) 0.41 ppb (5) N/A 10.8 μg/m3 (45) 45.0
 
Feb. 13, 2020, 1 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 10.0 ppb (8) 0.31 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
Feb. 13, 2020, noon N/A N/A N/A 24.0 ppb (22) N/A N/A 8.0 ppb (6) 0.28 ppb (3) N/A 9.9 μg/m3 (41) 41.0
 
Feb. 13, 2020, 11 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 13.0 ppb (10) 0.27 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
Feb. 13, 2020, 10 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 10.3 μg/m3 (43) 43.0
 
Feb. 13, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) 0.31 ppb (3) N/A 9.8 μg/m3 (41) 41.0
 
Feb. 13, 2020, 8 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 18.0 ppb (14) 0.27 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
Feb. 13, 2020, 7 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 16.0 ppb (12) 0.29 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
Feb. 13, 2020, 6 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 12.0 ppb (9) 0.35 ppb (4) N/A 3.8 μg/m3 (16) 19.0
 
Feb. 13, 2020, 5 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.33 ppb (4) N/A 3.7 μg/m3 (15) 19.0
 
Feb. 13, 2020, 4 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.31 ppb (3) N/A 3.8 μg/m3 (16) 16.0
 
Feb. 13, 2020, 3 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 19.0 ppb (15) 0.29 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
Feb. 13, 2020, 2 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.31 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
Feb. 13, 2020, 1 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.34 ppb (4) N/A 9.5 μg/m3 (40) 40.0
 
Feb. 13, 2020, midnight N/A N/A N/A 12.0 ppb (11) N/A N/A 22.0 ppb (17) 0.35 ppb (4) N/A 12.9 μg/m3 (52) 52.0
 
Feb. 12, 2020, 11 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 22.0 ppb (17) 0.34 ppb (4) N/A 15.6 μg/m3 (58) 58.0
 
Feb. 12, 2020, 10 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.31 ppb (3) N/A 15.7 μg/m3 (58) 58.0
 
Feb. 12, 2020, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.28 ppb (3) N/A 14.2 μg/m3 (55) 55.0
 
Feb. 12, 2020, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.27 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
Feb. 12, 2020, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 24.0 ppb (18) 0.28 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
Feb. 12, 2020, 6 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 21.0 ppb (16) 0.28 ppb (3) N/A 4.1 μg/m3 (17) 17.0
 
Feb. 12, 2020, 5 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.3 ppb (3) N/A 2.8 μg/m3 (12) 12.0
 
Feb. 12, 2020, 4 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A 9.0 ppb (7) 0.33 ppb (4) N/A 5.2 μg/m3 (22) 22.0
 
Feb. 12, 2020, 3 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 13.0 ppb (10) 0.34 ppb (4) N/A 6.3 μg/m3 (26) 26.0
 
Feb. 12, 2020, 2 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 17.0 ppb (13) 0.31 ppb (3) N/A 4.9 μg/m3 (20) 20.0
 
Feb. 12, 2020, 1 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) 0.26 ppb (3) N/A 8.9 μg/m3 (37) 37.0
 
Feb. 12, 2020, noon N/A N/A N/A 9.0 ppb (8) N/A N/A 21.0 ppb (16) 0.26 ppb (3) N/A 6.1 μg/m3 (25) 25.0
 
Feb. 12, 2020, 11 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 23.0 ppb (18) 0.24 ppb (3) N/A 4.5 μg/m3 (19) 19.0
 
Feb. 12, 2020, 10 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
Feb. 12, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
Feb. 12, 2020, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.23 ppb (3) N/A 5.3 μg/m3 (22) 22.0
 
Feb. 12, 2020, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) 0.24 ppb (3) N/A 4.3 μg/m3 (18) 22.0
 
Feb. 12, 2020, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.23 ppb (3) N/A 1.1 μg/m3 (5) 24.0
 
Feb. 12, 2020, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.24 ppb (3) N/A 2.4 μg/m3 (10) 23.0
 
Feb. 12, 2020, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.25 ppb (3) N/A 3.2 μg/m3 (13) 23.0
 
Feb. 12, 2020, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A 1.6 μg/m3 (7) 25.0
 
Feb. 12, 2020, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A 1.1 μg/m3 (5) 25.0
 
Feb. 12, 2020, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.25 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Feb. 11, 2020, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 1.2 μg/m3 (5) 26.0
 
Feb. 11, 2020, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.27 ppb (3) N/A 1.5 μg/m3 (6) 28.0
 
Feb. 11, 2020, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.25 ppb (3) N/A 2.5 μg/m3 (10) 29.0
 
Feb. 11, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 11, 2020, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A 3.3 μg/m3 (14) 28.0
 
Feb. 11, 2020, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A 1.1 μg/m3 (5) 28.0
 
Feb. 11, 2020, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 1.2 μg/m3 (5) 26.0
 
Feb. 11, 2020, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.25 ppb (3) N/A 1.2 μg/m3 (5) 25.0
 
Feb. 11, 2020, 3 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.33 ppb (4) N/A 1.6 μg/m3 (7) 16.0
 
Feb. 11, 2020, 2 p.m. N/A N/A N/A 25.0 ppb (23) N/A N/A 16.0 ppb (12) 0.4 ppb (4) N/A 1.6 μg/m3 (7) 23.0
 
Feb. 11, 2020, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A 0.9 μg/m3 (4) 28.0
 
Feb. 11, 2020, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.22 ppb (2) N/A 0.9 μg/m3 (4) 28.0
 
Feb. 11, 2020, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.21 ppb (2) N/A 0.8 μg/m3 (3) 27.0
 
Feb. 11, 2020, 10 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 6.0
 
Feb. 11, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.23 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
Feb. 11, 2020, 8 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.23 ppb (3) N/A 1.2 μg/m3 (5) 20.0
 
Feb. 11, 2020, 7 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A 12.0 ppb (9) 0.3 ppb (3) N/A 1.3 μg/m3 (5) 20.0
 
Feb. 11, 2020, 6 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 18.0 ppb (14) 0.29 ppb (3) N/A 1.7 μg/m3 (7) 18.0
 
Feb. 11, 2020, 5 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A 9.0 ppb (7) 0.34 ppb (4) N/A 3.4 μg/m3 (14) 26.0
 
Feb. 11, 2020, 4 a.m. N/A N/A N/A 38.0 ppb (35) N/A N/A 3.0 ppb (2) 0.45 ppb (5) N/A 8.0 μg/m3 (33) 35.0
 
Feb. 11, 2020, 3 a.m. N/A N/A N/A 29.0 ppb (27) N/A N/A 14.0 ppb (11) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 27.0
 
Feb. 11, 2020, 2 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 24.0 ppb (18) 0.31 ppb (3) N/A 4.1 μg/m3 (17) 18.0
 
Feb. 11, 2020, 1 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 26.0 ppb (20) 0.28 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
Feb. 11, 2020, midnight N/A N/A N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A 4.6 μg/m3 (19) 25.0
 
Feb. 10, 2020, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.23 ppb (3) N/A 3.6 μg/m3 (15) 28.0
 
Feb. 10, 2020, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.22 ppb (2) N/A 3.7 μg/m3 (15) 28.0
 
Feb. 10, 2020, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.22 ppb (2) N/A 4.9 μg/m3 (20) 26.0
 
Feb. 10, 2020, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.22 ppb (2) N/A 5.6 μg/m3 (23) 23.0
 
Feb. 10, 2020, 7 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 22.0 ppb (17) 0.24 ppb (3) N/A 7.1 μg/m3 (30) 30.0
 
Feb. 10, 2020, 6 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) 0.23 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
Feb. 10, 2020, 5 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 13.0 ppb (10) 0.25 ppb (3) N/A 7.1 μg/m3 (30) 30.0
 
Feb. 10, 2020, 4 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 12.0 ppb (9) 0.26 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
Feb. 10, 2020, 3 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 19.0 ppb (15) 0.27 ppb (3) N/A 4.2 μg/m3 (18) 18.0
 
Feb. 10, 2020, 2 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.27 ppb (3) N/A 1.7 μg/m3 (7) 22.0
 
Feb. 10, 2020, 1 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.21 ppb (2) N/A 0.7 μg/m3 (3) 27.0
 
Feb. 10, 2020, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.2 ppb (2) N/A 0.8 μg/m3 (3) 28.0
 
Feb. 10, 2020, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.2 ppb (2) N/A 0.2 μg/m3 (1) 25.0
 
Feb. 10, 2020, 10 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 0.1 μg/m3 (0) 6.0
 
Feb. 10, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.21 ppb (2) N/A 0.6 μg/m3 (2) 24.0
 
Feb. 10, 2020, 8 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.21 ppb (2) N/A 0.9 μg/m3 (4) 22.0
 
Feb. 10, 2020, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 25.0
 
Feb. 10, 2020, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.21 ppb (2) N/A 0.7 μg/m3 (3) 27.0
 
Feb. 10, 2020, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 0.8 μg/m3 (3) 28.0
 
Feb. 10, 2020, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 0.8 μg/m3 (3) 28.0
 
Feb. 10, 2020, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.2 ppb (2) N/A 0.8 μg/m3 (3) 28.0
 
Feb. 10, 2020, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 0.9 μg/m3 (4) 28.0
 
Feb. 10, 2020, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 0.9 μg/m3 (4) 28.0
 
Feb. 10, 2020, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.22 ppb (2) N/A 0.9 μg/m3 (4) 27.0
 
Feb. 9, 2020, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.22 ppb (2) N/A 0.9 μg/m3 (4) 28.0
 
Feb. 9, 2020, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 1.1 μg/m3 (5) 27.0
 
Feb. 9, 2020, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.22 ppb (2) N/A 1.0 μg/m3 (4) 28.0
 
Feb. 9, 2020, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 28.0
 
Feb. 9, 2020, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.22 ppb (2) N/A 1.3 μg/m3 (5) 26.0
 
Feb. 9, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 1.4 μg/m3 (6) 21.0
 
Feb. 9, 2020, 5 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.25 ppb (3) N/A 0.8 μg/m3 (3) 21.0
 
Feb. 9, 2020, 4 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.23 ppb (3) N/A 0.8 μg/m3 (3) 22.0
 
Feb. 9, 2020, 3 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 25.0 ppb (19) 0.23 ppb (3) N/A 0.9 μg/m3 (4) 19.0
 
Feb. 9, 2020, 2 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) 0.24 ppb (3) N/A 0.8 μg/m3 (3) 20.0
 
Feb. 9, 2020, 1 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) 0.21 ppb (2) N/A 1.1 μg/m3 (5) 18.0
 
Feb. 9, 2020, noon N/A N/A N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A 1.2 μg/m3 (5) 16.0
 
Feb. 9, 2020, 4 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 14.0 ppb (11) 0.32 ppb (4) N/A 4.1 μg/m3 (17) 18.0
 
Feb. 9, 2020, 3 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A 13.0 ppb (10) 0.36 ppb (4) N/A 2.8 μg/m3 (12) 20.0
 
Feb. 9, 2020, midnight N/A N/A N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 1.6 μg/m3 (7) 20.0
 
Feb. 8, 2020, 11 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.23 ppb (3) N/A 2.5 μg/m3 (10) 23.0
 
Feb. 8, 2020, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.21 ppb (2) N/A 3.1 μg/m3 (13) 25.0
 
Feb. 8, 2020, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.21 ppb (2) N/A 2.9 μg/m3 (12) 25.0
 
Feb. 8, 2020, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) 0.22 ppb (2) N/A 3.7 μg/m3 (15) 22.0
 
Feb. 8, 2020, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.22 ppb (2) N/A 3.4 μg/m3 (14) 21.0
 
Feb. 8, 2020, 6 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.23 ppb (3) N/A 3.2 μg/m3 (13) 19.0
 
Feb. 8, 2020, 5 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.23 ppb (3) N/A 2.8 μg/m3 (12) 19.0
 
Feb. 8, 2020, 4 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.24 ppb (3) N/A 3.1 μg/m3 (13) 18.0
 
Feb. 8, 2020, 3 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.22 ppb (2) N/A 2.0 μg/m3 (8) 19.0
 
Feb. 8, 2020, 2 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.22 ppb (2) N/A 2.7 μg/m3 (11) 18.0
 
Feb. 8, 2020, 1 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 23.0 ppb (18) 0.21 ppb (2) N/A 3.9 μg/m3 (16) 18.0
 
Feb. 8, 2020, noon N/A N/A N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 17.0
 
Feb. 8, 2020, 11 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 20.0 ppb (15) 0.21 ppb (2) N/A 4.5 μg/m3 (19) 19.0
 
Feb. 8, 2020, 10 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.5 μg/m3 (19) 19.0
 
Feb. 8, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) 0.28 ppb (3) N/A 3.9 μg/m3 (16) 16.0
 
Feb. 8, 2020, 8 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A 11.0 ppb (8) 0.29 ppb (3) N/A 3.9 μg/m3 (16) 20.0
 
Feb. 8, 2020, 6 a.m. N/A N/A N/A 23.0 ppb (21) N/A N/A 11.0 ppb (8) 0.28 ppb (3) N/A 2.5 μg/m3 (10) 21.0
 
Feb. 8, 2020, 3 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 20.0 ppb (15) 0.28 ppb (3) N/A 2.7 μg/m3 (11) 18.0
 
Feb. 8, 2020, 2 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 25.0 ppb (19) 0.25 ppb (3) N/A 3.1 μg/m3 (13) 19.0
 
Feb. 8, 2020, 1 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 26.0 ppb (20) 0.25 ppb (3) N/A 4.9 μg/m3 (20) 20.0
 
Feb. 8, 2020, midnight N/A N/A N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.26 ppb (3) N/A 5.1 μg/m3 (21) 22.0
 
Feb. 7, 2020, 11 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 4.7 μg/m3 (20) 24.0
 
Feb. 7, 2020, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 3.5 μg/m3 (15) 25.0
 
Feb. 7, 2020, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.2 ppb (2) N/A 2.5 μg/m3 (10) 26.0
 
Feb. 7, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.19 ppb (2) N/A 2.2 μg/m3 (9) 25.0
 
Feb. 7, 2020, 7 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.22 ppb (2) N/A 3.8 μg/m3 (16) 19.0
 
Feb. 7, 2020, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.22 ppb (2) N/A 1.5 μg/m3 (6) 20.0
 
Feb. 7, 2020, 5 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.25 ppb (3) N/A 1.3 μg/m3 (5) 15.0
 
Feb. 7, 2020, 4 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 13.0 ppb (10) 0.3 ppb (3) N/A 1.1 μg/m3 (5) 15.0
 
Feb. 7, 2020, 3 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 13.0 ppb (10) 0.31 ppb (3) N/A 1.0 μg/m3 (4) 18.0
 
Feb. 7, 2020, 2 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 14.0 ppb (11) 0.27 ppb (3) N/A 1.0 μg/m3 (4) 17.0
 
Feb. 7, 2020, 1 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 16.0 ppb (12) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 15.0
 
Feb. 7, 2020, noon N/A N/A N/A 16.0 ppb (15) N/A N/A 20.0 ppb (15) 0.23 ppb (3) N/A 1.2 μg/m3 (5) 15.0
 
Feb. 7, 2020, 11 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 18.0 ppb (14) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 14.0
 
Feb. 7, 2020, 10 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 19.0
 
Feb. 7, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.21 ppb (2) N/A 0.9 μg/m3 (4) 19.0
 
Feb. 7, 2020, 8 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 18.0 ppb (14) 0.22 ppb (2) N/A 0.9 μg/m3 (4) 14.0
 
Feb. 7, 2020, 7 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 10.0 ppb (8) 0.25 ppb (3) N/A 1.0 μg/m3 (4) 22.0
 
Feb. 7, 2020, 5 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) 0.22 ppb (2) N/A 0.7 μg/m3 (3) 15.0
 
Feb. 7, 2020, 4 a.m. N/A N/A N/A 40.0 ppb (37) N/A N/A 0.0 ppb (0) 0.58 ppb (6) N/A 2.9 μg/m3 (12) 37.0
 
Feb. 7, 2020, 3 a.m. N/A N/A N/A 43.0 ppb (40) N/A N/A 0.0 ppb (0) 0.71 ppb (8) N/A 4.1 μg/m3 (17) 40.0
 
Feb. 7, 2020, 2 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 3.4 μg/m3 (14) 34.0
 
Feb. 7, 2020, 1 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 15.0 ppb (12) 0.39 ppb (4) N/A 1.2 μg/m3 (5) 22.0
 
Feb. 7, 2020, midnight N/A N/A N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.25 ppb (3) N/A 0.7 μg/m3 (3) 22.0
 
Feb. 6, 2020, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.19 ppb (2) N/A 0.6 μg/m3 (2) 25.0
 
Feb. 6, 2020, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.19 ppb (2) N/A 0.6 μg/m3 (2) 25.0
 
Feb. 6, 2020, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A 0.7 μg/m3 (3) 25.0
 
Feb. 6, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A 0.9 μg/m3 (4) 25.0
 
Feb. 6, 2020, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.18 ppb (2) N/A 0.7 μg/m3 (3) 24.0
 
Feb. 6, 2020, 6 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 22.0 ppb (17) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 17.0
 
Feb. 6, 2020, 5 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 14.0 ppb (11) 0.25 ppb (3) N/A 1.3 μg/m3 (5) 17.0
 
Feb. 6, 2020, 3 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) 0.25 ppb (3) N/A 0.7 μg/m3 (3) 15.0
 
Feb. 6, 2020, 2 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 18.0 ppb (14) 0.32 ppb (4) N/A 0.6 μg/m3 (2) 19.0