ID: 1295

AQSQID: 000090222

Site Name: Calgary Northwest

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

Updated: Oct. 25, 2021, 10:04 a.m.

Location: Calgary (Varsity Acres), CC

Reporting: True, Located: True

Current AQI: 14.0

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
Oct. 25, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 15.0 ppb (14) 0.07 ppb (2) N/A 1.6 μg/m3 (7) 14.0
 
Oct. 25, 2021, 6 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) 0.08 ppb (2) N/A 1.4 μg/m3 (6) 17.0
 
Oct. 25, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 20.0 ppb (19) 0.08 ppb (2) N/A 1.8 μg/m3 (8) 19.0
 
Oct. 25, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.09 ppb (2) N/A 0.7 μg/m3 (3) 21.0
 
Oct. 25, 2021, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 24.0 ppb (23) 0.08 ppb (2) N/A 0.9 μg/m3 (4) 23.0
 
Oct. 25, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 23.0 ppb (22) 0.09 ppb (2) N/A 1.0 μg/m3 (5) 22.0
 
Oct. 25, 2021, 1 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) 0.09 ppb (2) N/A 1.4 μg/m3 (6) 23.0
 
Oct. 25, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) 0.09 ppb (2) N/A 1.1 μg/m3 (5) 26.0
 
Oct. 24, 2021, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 0.09 ppb (2) N/A 0.6 μg/m3 (3) 27.0
 
Oct. 24, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.08 ppb (2) N/A 0.4 μg/m3 (2) 29.0
 
Oct. 24, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.08 ppb (2) N/A 0.9 μg/m3 (4) 30.0
 
Oct. 24, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) 0.09 ppb (2) N/A 1.7 μg/m3 (8) 27.0
 
Oct. 24, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 27.0 ppb (25) 0.1 ppb (2) N/A 1.7 μg/m3 (8) 25.0
 
Oct. 24, 2021, 6 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 19.0 ppb (18) 0.15 ppb (2) N/A 2.5 μg/m3 (11) 18.0
 
Oct. 24, 2021, 5 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 14.0 ppb (13) 0.11 ppb (2) N/A 1.8 μg/m3 (8) 13.0
 
Oct. 24, 2021, 4 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 9.0 ppb (9) 0.13 ppb (2) N/A 1.8 μg/m3 (8) 10.0
 
Oct. 24, 2021, 3 p.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 3.0 ppb (3) 0.13 ppb (2) N/A 1.3 μg/m3 (6) 13.0
 
Oct. 24, 2021, 2 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 0.0 ppb (0) 0.11 ppb (2) N/A 1.5 μg/m3 (7) 16.0
 
Oct. 24, 2021, 1 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 0.0 ppb (0) 0.09 ppb (2) N/A 1.3 μg/m3 (6) 16.0
 
Oct. 24, 2021, noon N/A N/A N/A 14.0 ppb (14) N/A N/A 0.0 ppb (0) 0.08 ppb (2) N/A 0.8 μg/m3 (4) 14.0
 
Oct. 24, 2021, 11 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 0.0 ppb (0) 0.09 ppb (2) N/A 0.7 μg/m3 (3) 14.0
 
Oct. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
Oct. 24, 2021, 9 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 0.0 ppb (0) 0.12 ppb (2) N/A 1.1 μg/m3 (5) 13.0
 
Oct. 24, 2021, 8 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 0.0 ppb (0) 0.16 ppb (3) N/A 1.4 μg/m3 (6) 13.0
 
Oct. 24, 2021, 7 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 0.0 ppb (0) 0.2 ppb (3) N/A 2.1 μg/m3 (9) 12.0
 
Oct. 24, 2021, 6 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 0.0 ppb (0) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 24, 2021, 5 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 0.0 ppb (0) 0.3 ppb (4) N/A 8.7 μg/m3 (37) 37.0
 
Oct. 24, 2021, 4 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 1.0 ppb (1) 0.19 ppb (3) N/A 5.6 μg/m3 (24) 24.0
 
Oct. 24, 2021, 3 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 6.0 ppb (6) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 24, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 14.0 ppb (13) 0.1 ppb (2) N/A 1.4 μg/m3 (6) 13.0
 
Oct. 24, 2021, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 11.0 ppb (11) 0.13 ppb (2) N/A 1.5 μg/m3 (7) 11.0
 
Oct. 24, 2021, midnight N/A N/A N/A 12.0 ppb (12) N/A N/A 12.0 ppb (12) 0.16 ppb (3) N/A 1.6 μg/m3 (7) 12.0
 
Oct. 23, 2021, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.11 ppb (2) N/A 1.7 μg/m3 (8) 21.0
 
Oct. 23, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.08 ppb (2) N/A 0.2 μg/m3 (1) 25.0
 
Oct. 23, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 25.0 ppb (24) 0.08 ppb (2) N/A 0.5 μg/m3 (3) 24.0
 
Oct. 23, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.07 ppb (2) N/A 0.1 μg/m3 (1) 26.0
 
Oct. 23, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 25.0 ppb (24) 0.07 ppb (2) N/A 0.3 μg/m3 (2) 24.0
 
Oct. 23, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 20.0 ppb (19) 0.07 ppb (2) N/A 0.6 μg/m3 (3) 19.0
 
Oct. 23, 2021, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 13.0 ppb (13) 0.08 ppb (2) N/A 0.7 μg/m3 (3) 13.0
 
Oct. 23, 2021, 4 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 8.0 ppb (8) 0.09 ppb (2) N/A 2.1 μg/m3 (9) 9.0
 
Oct. 23, 2021, 3 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 7.0 ppb (7) 0.1 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
Oct. 23, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 7.0 ppb (7) 0.09 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
Oct. 23, 2021, 1 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 6.0 ppb (6) 0.09 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
Oct. 23, 2021, noon N/A N/A N/A 8.0 ppb (8) N/A N/A 7.0 ppb (7) 0.09 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
Oct. 23, 2021, 11 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 7.0 ppb (7) 0.08 ppb (2) N/A 5.5 μg/m3 (23) 23.0
 
Oct. 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Oct. 23, 2021, 9 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 3.0 ppb (3) 0.11 ppb (2) N/A 5.7 μg/m3 (24) 24.0
 
Oct. 23, 2021, 8 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 9.0 ppb (9) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 23, 2021, 7 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 9.0 ppb (9) 0.09 ppb (2) N/A 6.8 μg/m3 (29) 29.0
 
Oct. 23, 2021, 6 a.m. N/A N/A N/A 14.0 ppb (14) N/A N/A 10.0 ppb (10) 0.1 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
Oct. 23, 2021, 5 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 14.0 ppb (13) 0.09 ppb (2) N/A 8.6 μg/m3 (36) 36.0
 
Oct. 23, 2021, 4 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 16.0 ppb (15) 0.08 ppb (2) N/A 8.2 μg/m3 (35) 35.0
 
Oct. 23, 2021, 3 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 16.0 ppb (15) 0.09 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
Oct. 23, 2021, 2 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 16.0 ppb (15) 0.1 ppb (2) N/A 9.5 μg/m3 (40) 40.0
 
Oct. 23, 2021, 1 a.m. N/A N/A N/A 13.0 ppb (13) N/A N/A 16.0 ppb (15) 0.12 ppb (2) N/A 9.9 μg/m3 (42) 42.0
 
Oct. 23, 2021, midnight N/A N/A N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) 0.12 ppb (2) N/A 9.9 μg/m3 (42) 42.0
 
Oct. 22, 2021, 11 p.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) 0.13 ppb (2) N/A 8.2 μg/m3 (35) 35.0
 
Oct. 22, 2021, 10 p.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 5.0 ppb (5) 0.29 ppb (4) N/A 12.9 μg/m3 (53) 53.0
 
Oct. 22, 2021, 9 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 8.0 ppb (8) 0.21 ppb (3) N/A 12.9 μg/m3 (53) 53.0
 
Oct. 22, 2021, 8 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 9.0 ppb (9) 0.17 ppb (3) N/A 12.6 μg/m3 (53) 53.0
 
Oct. 22, 2021, 7 p.m. N/A N/A N/A 23.0 ppb (22) N/A N/A 7.0 ppb (7) 0.2 ppb (3) N/A 13.3 μg/m3 (54) 54.0
 
Oct. 22, 2021, 6 p.m. N/A N/A N/A 37.0 ppb (35) N/A N/A 4.0 ppb (4) 0.42 ppb (5) N/A 24.9 μg/m3 (78) 78.0
 
Oct. 22, 2021, 5 p.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 3.0 ppb (3) 0.28 ppb (4) N/A 13.8 μg/m3 (55) 55.0
 
Oct. 22, 2021, 4 p.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 2.0 ppb (2) 0.18 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
Oct. 22, 2021, 3 p.m. N/A N/A N/A 21.0 ppb (20) N/A N/A 2.0 ppb (2) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 22, 2021, 2 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 1.0 ppb (1) 0.16 ppb (3) N/A 6.2 μg/m3 (26) 26.0
 
Oct. 22, 2021, 1 p.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 1.0 ppb (1) 0.13 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
Oct. 22, 2021, noon N/A N/A N/A 24.0 ppb (23) N/A N/A 1.0 ppb (1) 0.12 ppb (2) N/A 5.2 μg/m3 (22) 23.0
 
Oct. 22, 2021, 11 a.m. N/A N/A N/A 24.0 ppb (23) N/A N/A 1.0 ppb (1) 0.13 ppb (2) N/A 5.7 μg/m3 (24) 24.0
 
Oct. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.3 μg/m3 (27) 27.0
 
Oct. 22, 2021, 9 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 4.0 ppb (4) 0.1 ppb (2) N/A 6.4 μg/m3 (27) 27.0
 
Oct. 22, 2021, 8 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 8.0 ppb (8) 0.09 ppb (2) N/A 6.3 μg/m3 (27) 27.0
 
Oct. 22, 2021, 7 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 13.0 ppb (13) 0.08 ppb (2) N/A 5.8 μg/m3 (25) 25.0
 
Oct. 22, 2021, 6 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 22.0 ppb (21) 0.07 ppb (2) N/A 4.7 μg/m3 (20) 21.0
 
Oct. 22, 2021, 5 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 18.0 ppb (17) 0.08 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
Oct. 22, 2021, 4 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 19.0 ppb (18) 0.1 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
Oct. 22, 2021, 3 a.m. N/A N/A N/A 28.0 ppb (27) N/A N/A 13.0 ppb (13) 0.18 ppb (3) N/A 5.1 μg/m3 (22) 27.0
 
Oct. 22, 2021, 2 a.m. N/A N/A N/A 30.0 ppb (29) N/A N/A 11.0 ppb (11) 0.22 ppb (3) N/A 6.4 μg/m3 (27) 29.0
 
Oct. 22, 2021, 1 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 18.0 ppb (17) 0.15 ppb (2) N/A 5.1 μg/m3 (22) 22.0
 
Oct. 22, 2021, midnight N/A N/A N/A 17.0 ppb (17) N/A N/A 24.0 ppb (23) 0.15 ppb (2) N/A 4.6 μg/m3 (20) 23.0
 
Oct. 21, 2021, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) 0.05 ppb (2) N/A 3.3 μg/m3 (14) 31.0
 
Oct. 21, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.02 ppb (0) N/A 2.4 μg/m3 (10) 34.0
 
Oct. 21, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.02 ppb (0) N/A 2.0 μg/m3 (9) 35.0
 
Oct. 21, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.03 ppb (0) N/A 1.8 μg/m3 (8) 34.0
 
Oct. 21, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.04 ppb (0) N/A 1.7 μg/m3 (8) 34.0
 
Oct. 21, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) 0.04 ppb (0) N/A 1.4 μg/m3 (6) 32.0
 
Oct. 21, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.04 ppb (0) N/A 1.0 μg/m3 (5) 31.0
 
Oct. 21, 2021, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 29.0 ppb (27) 0.06 ppb (2) N/A 0.7 μg/m3 (3) 27.0
 
Oct. 21, 2021, 3 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 16.0 ppb (15) 0.11 ppb (2) N/A 1.5 μg/m3 (7) 17.0
 
Oct. 21, 2021, 2 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 19.0 ppb (18) 0.08 ppb (2) N/A 0.9 μg/m3 (4) 18.0
 
Oct. 21, 2021, 1 p.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) 0.05 ppb (2) N/A 0.5 μg/m3 (3) 25.0
 
Oct. 21, 2021, noon N/A N/A N/A 6.0 ppb (6) N/A N/A 29.0 ppb (27) 0.04 ppb (0) N/A 0.3 μg/m3 (2) 27.0
 
Oct. 21, 2021, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 29.0 ppb (27) 0.03 ppb (0) N/A 0.3 μg/m3 (2) 27.0
 
Oct. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.6 μg/m3 (3) 3.0
 
Oct. 21, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.03 ppb (0) N/A 1.4 μg/m3 (6) 25.0
 
Oct. 21, 2021, 8 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) 0.04 ppb (0) N/A 3.3 μg/m3 (14) 18.0
 
Oct. 21, 2021, 7 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 10.0 ppb (10) 0.07 ppb (2) N/A 5.8 μg/m3 (25) 25.0
 
Oct. 21, 2021, 6 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 7.0 ppb (7) 0.09 ppb (2) N/A 7.5 μg/m3 (32) 32.0
 
Oct. 21, 2021, 5 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 9.0 ppb (9) 0.08 ppb (2) N/A 7.8 μg/m3 (33) 33.0
 
Oct. 21, 2021, 4 a.m. N/A N/A N/A 22.0 ppb (21) N/A N/A 3.0 ppb (3) 0.21 ppb (3) N/A 9.2 μg/m3 (39) 39.0
 
Oct. 21, 2021, 3 a.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 1.0 ppb (1) 0.4 ppb (5) N/A 12.9 μg/m3 (53) 53.0
 
Oct. 21, 2021, 2 a.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 1.0 ppb (1) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 21, 2021, 1 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 7.0 ppb (7) 0.18 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Oct. 21, 2021, midnight N/A N/A N/A 13.0 ppb (13) N/A N/A 15.0 ppb (14) 0.12 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 20, 2021, 11 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 19.0 ppb (18) 0.08 ppb (2) N/A 6.6 μg/m3 (28) 28.0
 
Oct. 20, 2021, 10 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 20.0 ppb (19) 0.07 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
Oct. 20, 2021, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) 0.06 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
Oct. 20, 2021, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 20.0 ppb (19) 0.06 ppb (2) N/A 4.9 μg/m3 (21) 21.0
 
Oct. 20, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.06 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
Oct. 20, 2021, 6 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 17.0 ppb (16) 0.05 ppb (2) N/A 3.1 μg/m3 (13) 16.0
 
Oct. 20, 2021, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 16.0 ppb (15) 0.06 ppb (2) N/A 2.8 μg/m3 (12) 15.0
 
Oct. 20, 2021, 4 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 15.0 ppb (14) 0.06 ppb (2) N/A 2.2 μg/m3 (10) 14.0
 
Oct. 20, 2021, 3 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 11.0 ppb (11) 0.08 ppb (2) N/A 1.9 μg/m3 (8) 11.0
 
Oct. 20, 2021, 2 p.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 6.0 ppb (6) 0.11 ppb (2) N/A 1.9 μg/m3 (8) 16.0
 
Oct. 20, 2021, 1 p.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 7.0 ppb (7) 0.09 ppb (2) N/A 1.5 μg/m3 (7) 15.0
 
Oct. 20, 2021, noon N/A N/A N/A 10.0 ppb (10) N/A N/A 11.0 ppb (11) 0.05 ppb (2) N/A 1.4 μg/m3 (6) 11.0
 
Oct. 20, 2021, 11 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 13.0 ppb (13) 0.04 ppb (0) N/A 1.4 μg/m3 (6) 13.0
 
Oct. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
Oct. 20, 2021, 9 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 16.0 ppb (15) 0.03 ppb (0) N/A 1.4 μg/m3 (6) 15.0
 
Oct. 20, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 16.0 ppb (15) 0.04 ppb (0) N/A 1.5 μg/m3 (7) 15.0
 
Oct. 20, 2021, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.03 ppb (0) N/A 1.5 μg/m3 (7) 17.0
 
Oct. 20, 2021, 6 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) 0.04 ppb (0) N/A 1.5 μg/m3 (7) 18.0
 
Oct. 20, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 20.0 ppb (19) 0.04 ppb (0) N/A 1.2 μg/m3 (5) 19.0
 
Oct. 20, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.05 ppb (2) N/A 1.1 μg/m3 (5) 21.0
 
Oct. 20, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 22.0 ppb (21) 0.05 ppb (2) N/A 1.3 μg/m3 (6) 21.0
 
Oct. 20, 2021, 2 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) 0.05 ppb (2) N/A 1.8 μg/m3 (8) 20.0
 
Oct. 20, 2021, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 22.0 ppb (21) 0.06 ppb (2) N/A 2.5 μg/m3 (11) 21.0
 
Oct. 20, 2021, midnight N/A N/A N/A 7.0 ppb (7) N/A N/A 26.0 ppb (25) 0.06 ppb (2) N/A 2.5 μg/m3 (11) 25.0
 
Oct. 19, 2021, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.04 ppb (0) N/A 2.5 μg/m3 (11) 11.0
 
Oct. 19, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.04 ppb (0) N/A 2.8 μg/m3 (12) 12.0
 
Oct. 19, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.03 ppb (0) N/A N/A 4.0
 
Oct. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A 0.03 ppb (0) N/A 7.4 μg/m3 (31) 31.0
 
Oct. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) 0.04 ppb (0) N/A 6.9 μg/m3 (29) 29.0
 
Oct. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) 0.03 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 19, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 20.0 ppb (19) 0.03 ppb (0) N/A 4.3 μg/m3 (18) 19.0
 
Oct. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.3 μg/m3 (18) 18.0
 
Oct. 19, 2021, 2 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.04 ppb (0) N/A 5.2 μg/m3 (22) 22.0
 
Oct. 19, 2021, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.03 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 19, 2021, noon N/A N/A N/A 5.0 ppb (5) N/A N/A 18.0 ppb (17) 0.02 ppb (0) N/A 3.7 μg/m3 (16) 17.0
 
Oct. 19, 2021, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 18.0 ppb (17) 0.01 ppb (0) N/A 3.7 μg/m3 (16) 17.0
 
Oct. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.7 μg/m3 (16) 16.0
 
Oct. 19, 2021, 9 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 19.0 ppb (18) 0.01 ppb (0) N/A 3.6 μg/m3 (16) 18.0
 
Oct. 19, 2021, 8 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 19.0 ppb (18) 0.02 ppb (0) N/A 5.3 μg/m3 (23) 23.0
 
Oct. 19, 2021, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 17.0 ppb (16) 0.02 ppb (0) N/A 8.8 μg/m3 (37) 37.0
 
Oct. 19, 2021, 6 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.03 ppb (0) N/A 8.4 μg/m3 (36) 36.0
 
Oct. 19, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.03 ppb (0) N/A 7.9 μg/m3 (33) 33.0
 
Oct. 19, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 17.0 ppb (16) 0.03 ppb (0) N/A 5.5 μg/m3 (23) 23.0
 
Oct. 19, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 16.0 ppb (15) 0.03 ppb (0) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 19, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 15.0 ppb (14) 0.03 ppb (0) N/A 8.5 μg/m3 (36) 36.0
 
Oct. 19, 2021, 1 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 16.0 ppb (15) 0.03 ppb (0) N/A 7.5 μg/m3 (32) 32.0
 
Oct. 19, 2021, midnight N/A N/A N/A 9.0 ppb (9) N/A N/A 16.0 ppb (15) 0.04 ppb (0) N/A 6.9 μg/m3 (29) 29.0
 
Oct. 18, 2021, 11 p.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 16.0 ppb (15) 0.05 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Oct. 18, 2021, 10 p.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 18.0 ppb (17) 0.06 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Oct. 18, 2021, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) 0.05 ppb (2) N/A 3.6 μg/m3 (16) 20.0
 
Oct. 18, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 22.0 ppb (21) 0.04 ppb (0) N/A 2.5 μg/m3 (11) 21.0
 
Oct. 18, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 24.0 ppb (23) N/A N/A 1.4 μg/m3 (6) 23.0
 
Oct. 18, 2021, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 26.0 ppb (25) N/A N/A 1.3 μg/m3 (6) 25.0
 
Oct. 18, 2021, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 26.0 ppb (25) N/A N/A 2.4 μg/m3 (10) 25.0
 
Oct. 18, 2021, 4 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 24.0 ppb (23) N/A N/A 2.9 μg/m3 (13) 23.0
 
Oct. 18, 2021, 3 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 24.0 ppb (23) 0.4 ppb (5) N/A 3.5 μg/m3 (15) 23.0
 
Oct. 18, 2021, 2 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 20.0 ppb (19) 0.46 ppb (6) N/A 5.1 μg/m3 (22) 22.0
 
Oct. 18, 2021, 1 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) 0.39 ppb (5) N/A 5.2 μg/m3 (22) 22.0
 
Oct. 18, 2021, noon N/A N/A N/A 5.0 ppb (5) N/A N/A 21.0 ppb (20) 0.37 ppb (5) N/A 4.4 μg/m3 (19) 20.0
 
Oct. 18, 2021, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 21.0 ppb (20) 0.37 ppb (5) N/A 5.7 μg/m3 (24) 24.0
 
Oct. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 18, 2021, 4 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 21.0 ppb (20) 0.36 ppb (5) N/A 5.3 μg/m3 (23) 23.0
 
Oct. 18, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 20.0 ppb (19) 0.34 ppb (4) N/A 7.5 μg/m3 (32) 32.0
 
Oct. 18, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0