ID: 1168

AQSQID: 000102701

Site Name: Williams Lake Columneetza School

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

Updated: March 1, 2021, 5:32 p.m.

Location: Williams Lake (Williams Lake Riv Valley Trl), CC

Reporting: True, Located: True

Current AQI: 21.0

Williams Lake (Williams Lake Riv Valley Trl) CC, CA: 52.1342, -122.1528

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 1, 2021, 4 p.m. N/A 22.1 ppb (21) N/A 14.0 ppb (14) N/A N/A 21.0 ppb (20) N/A N/A 2.7 μg/m3 (12) 21.0
 
March 1, 2021, 3 p.m. N/A 21.2 ppb (20) N/A 13.0 ppb (13) N/A N/A 19.0 ppb (18) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 1, 2021, 2 p.m. N/A 19.5 ppb (19) N/A 12.0 ppb (12) N/A N/A 21.0 ppb (20) N/A N/A 2.0 μg/m3 (9) 20.0
 
March 1, 2021, 1 p.m. N/A 19.9 ppb (19) N/A 9.0 ppb (9) N/A N/A 29.0 ppb (27) N/A N/A 1.2 μg/m3 (5) 27.0
 
March 1, 2021, noon N/A 21.0 ppb (20) N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) N/A N/A 0.9 μg/m3 (4) 28.0
 
March 1, 2021, 11 a.m. N/A 22.9 ppb (22) N/A 9.0 ppb (9) N/A N/A 30.0 ppb (28) N/A N/A 0.9 μg/m3 (4) 28.0
 
March 1, 2021, 10 a.m. N/A 22.5 ppb (22) N/A 10.0 ppb (10) N/A N/A 25.0 ppb (24) N/A N/A 10.1 μg/m3 (43) 43.0
 
March 1, 2021, 9 a.m. N/A 22.8 ppb (22) N/A 9.0 ppb (9) N/A N/A 24.0 ppb (23) N/A N/A 0.9 μg/m3 (4) 23.0
 
March 1, 2021, 8 a.m. N/A 23.3 ppb (22) N/A 9.0 ppb (9) N/A N/A 23.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
March 1, 2021, 7 a.m. N/A 22.8 ppb (22) N/A 10.0 ppb (10) N/A N/A 21.0 ppb (20) N/A N/A 1.2 μg/m3 (5) 22.0
 
March 1, 2021, 6 a.m. N/A 21.3 ppb (21) N/A 10.0 ppb (10) N/A N/A 21.0 ppb (20) N/A N/A 6.3 μg/m3 (27) 27.0
 
March 1, 2021, 5 a.m. N/A 19.9 ppb (19) N/A 11.0 ppb (11) N/A N/A 23.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
March 1, 2021, 4 a.m. N/A 18.7 ppb (18) N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) N/A N/A 1.3 μg/m3 (6) 28.0
 
March 1, 2021, 3 a.m. N/A 15.8 ppb (15) N/A 11.0 ppb (11) N/A N/A 29.0 ppb (27) N/A N/A 1.7 μg/m3 (8) 27.0
 
March 1, 2021, 2 a.m. N/A 15.6 ppb (15) N/A 12.0 ppb (12) N/A N/A 31.0 ppb (29) N/A N/A 2.3 μg/m3 (10) 29.0
 
March 1, 2021, 1 a.m. N/A 15.9 ppb (15) N/A 13.0 ppb (13) N/A N/A 32.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
March 1, 2021, midnight N/A 14.9 ppb (15) N/A 13.0 ppb (13) N/A N/A 33.0 ppb (31) N/A N/A 0.5 μg/m3 (3) 31.0
 
Feb. 28, 2021, 11 p.m. N/A 16.1 ppb (16) N/A 15.0 ppb (15) N/A N/A 32.0 ppb (30) N/A N/A 1.4 μg/m3 (6) 30.0
 
Feb. 28, 2021, 10 p.m. N/A 19.4 ppb (19) N/A 15.0 ppb (15) N/A N/A 33.0 ppb (31) N/A N/A 0.8 μg/m3 (4) 31.0
 
Feb. 28, 2021, 9 p.m. N/A 20.1 ppb (19) N/A 13.0 ppb (13) N/A N/A 33.0 ppb (31) N/A N/A 0.8 μg/m3 (4) 31.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
Feb. 28, 2021, 7 p.m. N/A 31.5 ppb (30) N/A 13.0 ppb (13) N/A N/A 33.0 ppb (31) N/A N/A 0.6 μg/m3 (3) 31.0
 
Feb. 28, 2021, 6 p.m. N/A 31.5 ppb (30) N/A 11.0 ppb (11) N/A N/A 29.0 ppb (27) N/A N/A 1.4 μg/m3 (6) 30.0
 
Feb. 28, 2021, 5 p.m. N/A 30.5 ppb (29) N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) N/A N/A 1.5 μg/m3 (7) 29.0
 
Feb. 28, 2021, 4 p.m. N/A 31.0 ppb (30) N/A 12.0 ppb (12) N/A N/A 25.0 ppb (24) N/A N/A 1.3 μg/m3 (6) 30.0
 
Feb. 28, 2021, 3 p.m. N/A 29.5 ppb (28) N/A 12.0 ppb (12) N/A N/A 22.0 ppb (21) N/A N/A 1.5 μg/m3 (7) 28.0
 
Feb. 28, 2021, 2 p.m. N/A 28.8 ppb (28) N/A 13.0 ppb (13) N/A N/A 22.0 ppb (21) N/A N/A 1.7 μg/m3 (8) 28.0
 
Feb. 28, 2021, 1 p.m. N/A 28.7 ppb (28) N/A 11.0 ppb (11) N/A N/A 29.0 ppb (27) N/A N/A 1.7 μg/m3 (8) 28.0
 
Feb. 28, 2021, noon N/A 29.7 ppb (29) N/A 10.0 ppb (10) N/A N/A 35.0 ppb (33) N/A N/A 2.9 μg/m3 (13) 33.0
 
Feb. 28, 2021, 11 a.m. N/A 28.6 ppb (27) N/A 10.0 ppb (10) N/A N/A 35.0 ppb (33) N/A N/A 0.6 μg/m3 (3) 33.0
 
Feb. 28, 2021, 10 a.m. N/A 27.8 ppb (27) N/A 10.0 ppb (10) N/A N/A 34.0 ppb (32) N/A N/A 0.4 μg/m3 (2) 32.0
 
Feb. 28, 2021, 9 a.m. N/A 26.7 ppb (26) N/A 10.0 ppb (10) N/A N/A 34.0 ppb (32) N/A N/A 0.7 μg/m3 (3) 32.0
 
Feb. 28, 2021, 8 a.m. N/A 23.6 ppb (23) N/A 9.0 ppb (9) N/A N/A 31.0 ppb (29) N/A N/A 1.3 μg/m3 (6) 29.0
 
Feb. 28, 2021, 7 a.m. N/A 20.5 ppb (20) N/A 9.0 ppb (9) N/A N/A 32.0 ppb (30) N/A N/A 2.9 μg/m3 (13) 30.0
 
Feb. 28, 2021, 6 a.m. N/A 18.6 ppb (18) N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) N/A N/A 5.9 μg/m3 (25) 28.0
 
Feb. 28, 2021, 5 a.m. N/A 17.3 ppb (17) N/A 11.0 ppb (11) N/A N/A 29.0 ppb (27) N/A N/A 2.1 μg/m3 (9) 27.0
 
Feb. 28, 2021, 4 a.m. N/A 16.2 ppb (16) N/A 12.0 ppb (12) N/A N/A 29.0 ppb (27) N/A N/A 3.0 μg/m3 (13) 27.0
 
Feb. 28, 2021, 3 a.m. N/A 15.3 ppb (15) N/A 11.0 ppb (11) N/A N/A 33.0 ppb (31) N/A N/A 3.9 μg/m3 (17) 31.0
 
Feb. 28, 2021, 2 a.m. N/A 15.4 ppb (15) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) N/A N/A 2.9 μg/m3 (13) 38.0
 
Feb. 28, 2021, 1 a.m. N/A 15.5 ppb (15) N/A 10.0 ppb (10) N/A N/A 42.0 ppb (39) N/A N/A 5.3 μg/m3 (23) 39.0
 
Feb. 28, 2021, midnight N/A 16.0 ppb (16) N/A 10.0 ppb (10) N/A N/A 41.0 ppb (38) N/A N/A 2.5 μg/m3 (11) 38.0
 
Feb. 27, 2021, 11 p.m. N/A 16.0 ppb (16) N/A 10.0 ppb (10) N/A N/A 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
Feb. 27, 2021, 10 p.m. N/A 16.1 ppb (16) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 2.3 μg/m3 (10) 37.0
 
Feb. 27, 2021, 9 p.m. N/A 16.1 ppb (16) N/A 11.0 ppb (11) N/A N/A 38.0 ppb (36) N/A N/A 4.8 μg/m3 (20) 36.0
 
Feb. 27, 2021, 8 p.m. N/A 16.2 ppb (16) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) N/A N/A 10.5 μg/m3 (44) 44.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.4 μg/m3 (27) 27.0
 
Feb. 27, 2021, 6 p.m. N/A 15.5 ppb (15) N/A 11.0 ppb (11) N/A N/A 30.0 ppb (28) N/A N/A 3.7 μg/m3 (16) 28.0
 
Feb. 27, 2021, 5 p.m. N/A 15.9 ppb (15) N/A 12.0 ppb (12) N/A N/A 27.0 ppb (25) N/A N/A 3.9 μg/m3 (17) 25.0
 
Feb. 27, 2021, 4 p.m. N/A 15.8 ppb (15) N/A 14.0 ppb (14) N/A N/A 23.0 ppb (22) N/A N/A 4.5 μg/m3 (19) 22.0
 
Feb. 27, 2021, 3 p.m. N/A 14.4 ppb (14) N/A 17.0 ppb (17) N/A N/A 16.0 ppb (15) N/A N/A 6.2 μg/m3 (26) 26.0
 
Feb. 27, 2021, 2 p.m. N/A 13.5 ppb (13) N/A 19.0 ppb (18) N/A N/A 14.0 ppb (13) N/A N/A 2.7 μg/m3 (12) 18.0
 
Feb. 27, 2021, 1 p.m. N/A 14.2 ppb (14) N/A 18.0 ppb (17) N/A N/A 21.0 ppb (20) N/A N/A 0.3 μg/m3 (2) 20.0
 
Feb. 27, 2021, noon N/A 12.9 ppb (13) N/A 14.0 ppb (14) N/A N/A 27.0 ppb (25) N/A N/A 0.3 μg/m3 (2) 25.0
 
Feb. 27, 2021, 11 a.m. N/A 12.2 ppb (12) N/A 11.0 ppb (11) N/A N/A 34.0 ppb (32) N/A N/A 1.0 μg/m3 (5) 32.0
 
Feb. 27, 2021, 10 a.m. N/A 13.2 ppb (13) N/A 12.0 ppb (12) N/A N/A 34.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 32.0
 
Feb. 27, 2021, 9 a.m. N/A 14.1 ppb (14) N/A 12.0 ppb (12) N/A N/A 34.0 ppb (32) N/A N/A 6.8 μg/m3 (29) 32.0
 
Feb. 27, 2021, 8 a.m. N/A 14.2 ppb (14) N/A 11.0 ppb (11) N/A N/A 36.0 ppb (34) N/A N/A 2.8 μg/m3 (12) 34.0
 
Feb. 27, 2021, 7 a.m. N/A 15.2 ppb (15) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
Feb. 27, 2021, 6 a.m. N/A 15.5 ppb (15) N/A 12.0 ppb (12) N/A N/A 34.0 ppb (32) N/A N/A 4.8 μg/m3 (20) 32.0
 
Feb. 27, 2021, 5 a.m. N/A 15.0 ppb (15) N/A 13.0 ppb (13) N/A N/A 32.0 ppb (30) N/A N/A 7.0 μg/m3 (30) 30.0
 
Feb. 27, 2021, 4 a.m. N/A 14.5 ppb (14) N/A 12.0 ppb (12) N/A N/A 32.0 ppb (30) N/A N/A 3.3 μg/m3 (14) 30.0
 
Feb. 27, 2021, 3 a.m. N/A 14.2 ppb (14) N/A 11.0 ppb (11) N/A N/A 36.0 ppb (34) N/A N/A 2.9 μg/m3 (13) 34.0
 
Feb. 27, 2021, 2 a.m. N/A 13.9 ppb (14) N/A 12.0 ppb (12) N/A N/A 35.0 ppb (33) N/A N/A 2.3 μg/m3 (10) 33.0
 
Feb. 27, 2021, 1 a.m. N/A 14.0 ppb (14) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) N/A N/A 2.6 μg/m3 (11) 35.0
 
Feb. 27, 2021, midnight N/A 13.7 ppb (13) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 1.6 μg/m3 (7) 36.0
 
Feb. 26, 2021, 11 p.m. N/A 14.3 ppb (14) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 1.1 μg/m3 (5) 38.0
 
Feb. 26, 2021, 10 p.m. N/A 14.9 ppb (15) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 2.0 μg/m3 (9) 36.0
 
Feb. 26, 2021, 9 p.m. N/A 14.3 ppb (14) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
Feb. 26, 2021, 8 p.m. N/A 14.1 ppb (14) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) N/A N/A 1.4 μg/m3 (6) 38.0
 
Feb. 26, 2021, 7 p.m. N/A 13.9 ppb (14) N/A 10.0 ppb (10) N/A N/A 41.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
Feb. 26, 2021, 6 p.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. 26, 2021, 5 p.m. N/A 14.1 ppb (14) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) N/A N/A 1.7 μg/m3 (8) 38.0
 
Feb. 26, 2021, 4 p.m. N/A 14.5 ppb (14) N/A 11.0 ppb (11) N/A N/A 37.0 ppb (35) N/A N/A 1.2 μg/m3 (5) 35.0
 
Feb. 26, 2021, 3 p.m. N/A 15.6 ppb (15) N/A 11.0 ppb (11) N/A N/A 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
Feb. 26, 2021, 2 p.m. N/A 16.3 ppb (16) N/A 11.0 ppb (11) N/A N/A 36.0 ppb (34) N/A N/A 4.8 μg/m3 (20) 34.0
 
Feb. 26, 2021, 1 p.m. N/A 16.9 ppb (16) N/A 11.0 ppb (11) N/A N/A 36.0 ppb (34) N/A N/A 4.5 μg/m3 (19) 34.0
 
Feb. 26, 2021, noon N/A 17.4 ppb (17) N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) N/A N/A 3.9 μg/m3 (17) 35.0
 
Feb. 26, 2021, 11 a.m. N/A 18.4 ppb (18) N/A 9.0 ppb (9) N/A N/A 40.0 ppb (38) N/A N/A 0.8 μg/m3 (4) 38.0
 
Feb. 26, 2021, 10 a.m. N/A 19.4 ppb (19) N/A 9.0 ppb (9) N/A N/A 40.0 ppb (38) N/A N/A 0.8 μg/m3 (4) 38.0
 
Feb. 26, 2021, 9 a.m. N/A 19.3 ppb (19) N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
Feb. 26, 2021, 8 a.m. N/A 19.3 ppb (19) N/A 9.0 ppb (9) N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
Feb. 26, 2021, 7 a.m. N/A 19.2 ppb (19) N/A 9.0 ppb (9) N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
Feb. 26, 2021, 6 a.m. N/A 19.8 ppb (19) N/A 9.0 ppb (9) N/A N/A 40.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
Feb. 26, 2021, 5 a.m. N/A 20.5 ppb (20) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 1.5 μg/m3 (7) 37.0
 
Feb. 26, 2021, 4 a.m. N/A 21.2 ppb (20) N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) N/A N/A 1.6 μg/m3 (7) 37.0
 
Feb. 26, 2021, 3 a.m. N/A 22.8 ppb (22) N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) N/A N/A 1.2 μg/m3 (5) 37.0
 
Feb. 26, 2021, 2 a.m. N/A 24.4 ppb (24) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
Feb. 26, 2021, 1 a.m. N/A 24.7 ppb (24) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 1.0 μg/m3 (5) 37.0
 
Feb. 26, 2021, midnight N/A 25.8 ppb (25) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) N/A N/A 6.4 μg/m3 (27) 35.0
 
Feb. 25, 2021, 11 p.m. N/A 27.0 ppb (26) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) N/A N/A 1.2 μg/m3 (5) 35.0
 
Feb. 25, 2021, 10 p.m. N/A 26.8 ppb (26) N/A 12.0 ppb (12) N/A N/A 36.0 ppb (34) N/A N/A 1.7 μg/m3 (8) 34.0
 
Feb. 25, 2021, 9 p.m. N/A 25.8 ppb (25) N/A 14.0 ppb (14) N/A N/A 31.0 ppb (29) N/A N/A 3.4 μg/m3 (15) 29.0
 
Feb. 25, 2021, 8 p.m. N/A 24.6 ppb (24) N/A 14.0 ppb (14) N/A N/A 30.0 ppb (28) N/A N/A 3.6 μg/m3 (16) 28.0
 
Feb. 25, 2021, 7 p.m. N/A 23.2 ppb (22) N/A 14.0 ppb (14) N/A N/A 28.0 ppb (26) N/A N/A 2.7 μg/m3 (12) 26.0
 
Feb. 25, 2021, 6 p.m. N/A 21.4 ppb (21) N/A 14.0 ppb (14) N/A N/A 30.0 ppb (28) N/A N/A 2.3 μg/m3 (10) 28.0
 
Feb. 25, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.5 μg/m3 (15) 15.0
 
Feb. 25, 2021, 4 p.m. N/A 18.1 ppb (18) N/A 14.0 ppb (14) N/A N/A 27.0 ppb (25) N/A N/A 1.9 μg/m3 (8) 25.0
 
Feb. 25, 2021, 3 p.m. N/A 16.1 ppb (16) N/A 14.0 ppb (14) N/A N/A 27.0 ppb (25) N/A N/A 3.4 μg/m3 (15) 25.0
 
Feb. 25, 2021, 2 p.m. N/A 15.1 ppb (15) N/A 12.0 ppb (12) N/A N/A 35.0 ppb (33) N/A N/A 2.7 μg/m3 (12) 33.0
 
Feb. 25, 2021, 1 p.m. N/A 12.7 ppb (12) N/A 13.0 ppb (13) N/A N/A 34.0 ppb (32) N/A N/A 2.4 μg/m3 (10) 32.0
 
Feb. 25, 2021, noon N/A 10.8 ppb (11) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
Feb. 25, 2021, 11 a.m. N/A 8.4 ppb (8) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 4.4 μg/m3 (19) 36.0
 
Feb. 25, 2021, 10 a.m. N/A 6.0 ppb (6) N/A 12.0 ppb (12) N/A N/A 39.0 ppb (37) N/A N/A 0.4 μg/m3 (2) 37.0
 
Feb. 25, 2021, 9 a.m. N/A 4.0 ppb (4) N/A 11.0 ppb (11) N/A N/A 39.0 ppb (37) N/A N/A 0.6 μg/m3 (3) 37.0
 
Feb. 25, 2021, 8 a.m. N/A 2.6 ppb (3) N/A 11.0 ppb (11) N/A N/A 39.0 ppb (37) N/A N/A 0.6 μg/m3 (3) 37.0
 
Feb. 25, 2021, 7 a.m. N/A 2.0 ppb (2) N/A 12.0 ppb (12) N/A N/A 39.0 ppb (37) N/A N/A 0.6 μg/m3 (3) 37.0
 
Feb. 25, 2021, 6 a.m. N/A 2.2 ppb (3) N/A 13.0 ppb (13) N/A N/A 39.0 ppb (37) N/A N/A 0.6 μg/m3 (3) 37.0
 
Feb. 25, 2021, 5 a.m. N/A 3.8 ppb (4) N/A 13.0 ppb (13) N/A N/A 38.0 ppb (36) N/A N/A 0.6 μg/m3 (3) 36.0
 
Feb. 25, 2021, 4 a.m. N/A 4.4 ppb (5) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 1.1 μg/m3 (5) 36.0
 
Feb. 25, 2021, 3 a.m. N/A 4.4 ppb (5) N/A 13.0 ppb (13) N/A N/A 39.0 ppb (37) N/A N/A 1.4 μg/m3 (6) 37.0
 
Feb. 25, 2021, 2 a.m. N/A 6.9 ppb (7) N/A 13.0 ppb (13) N/A N/A 39.0 ppb (37) N/A N/A 1.4 μg/m3 (6) 37.0
 
Feb. 25, 2021, 1 a.m. N/A 9.2 ppb (9) N/A 13.0 ppb (13) N/A N/A 39.0 ppb (37) N/A N/A 1.8 μg/m3 (8) 37.0
 
Feb. 25, 2021, midnight N/A 12.4 ppb (12) N/A 13.0 ppb (13) N/A N/A 39.0 ppb (37) N/A N/A 1.7 μg/m3 (8) 37.0
 
Feb. 24, 2021, 11 p.m. N/A 17.4 ppb (17) N/A 12.0 ppb (12) N/A N/A 39.0 ppb (37) N/A N/A 3.5 μg/m3 (15) 37.0
 
Feb. 24, 2021, 10 p.m. N/A 17.6 ppb (17) N/A 11.0 ppb (11) N/A N/A 35.0 ppb (33) N/A N/A 5.2 μg/m3 (22) 33.0
 
Feb. 24, 2021, 9 p.m. N/A 17.8 ppb (17) N/A 11.0 ppb (11) N/A N/A 34.0 ppb (32) N/A N/A 4.7 μg/m3 (20) 32.0
 
Feb. 24, 2021, 8 p.m. N/A 18.8 ppb (18) N/A 11.0 ppb (11) N/A N/A 33.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
Feb. 24, 2021, 7 p.m. N/A 20.6 ppb (20) N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) N/A N/A 7.4 μg/m3 (31) 31.0
 
Feb. 24, 2021, 6 p.m. N/A 22.3 ppb (22) N/A 12.0 ppb (12) N/A N/A 24.0 ppb (23) N/A N/A 10.0 μg/m3 (42) 42.0
 
Feb. 24, 2021, 5 p.m. N/A 21.8 ppb (21) N/A 12.0 ppb (12) N/A N/A 22.0 ppb (21) N/A N/A 15.3 μg/m3 (58) 58.0
 
Feb. 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.1 μg/m3 (54) 54.0
 
Feb. 24, 2021, 3 p.m. N/A 22.9 ppb (22) N/A 18.0 ppb (17) N/A N/A 6.0 ppb (6) N/A N/A 14.5 μg/m3 (57) 57.0
 
Feb. 24, 2021, 2 p.m. N/A 21.6 ppb (21) N/A 17.0 ppb (17) N/A N/A 6.0 ppb (6) N/A N/A 13.4 μg/m3 (54) 54.0
 
Feb. 24, 2021, 1 p.m. N/A 23.7 ppb (23) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (5) N/A N/A 14.8 μg/m3 (57) 57.0
 
Feb. 24, 2021, noon N/A 24.5 ppb (24) N/A 16.0 ppb (16) N/A N/A 6.0 ppb (6) N/A N/A 18.9 μg/m3 (66) 66.0
 
Feb. 24, 2021, 11 a.m. N/A 26.5 ppb (25) N/A 18.0 ppb (17) N/A N/A 6.0 ppb (6) N/A N/A 15.7 μg/m3 (59) 59.0
 
Feb. 24, 2021, 10 a.m. N/A 27.2 ppb (26) N/A 15.0 ppb (15) N/A N/A 15.0 ppb (14) N/A N/A 8.6 μg/m3 (36) 36.0
 
Feb. 24, 2021, 9 a.m. N/A 30.7 ppb (29) N/A 15.0 ppb (15) N/A N/A 18.0 ppb (17) N/A N/A 11.2 μg/m3 (47) 47.0
 
Feb. 24, 2021, 8 a.m. N/A 34.0 ppb (33) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (11) N/A N/A 17.1 μg/m3 (62) 62.0
 
Feb. 24, 2021, 7 a.m. N/A 38.0 ppb (36) N/A 21.0 ppb (20) N/A N/A 6.0 ppb (6) N/A N/A 20.9 μg/m3 (70) 70.0
 
Feb. 24, 2021, 6 a.m. N/A 36.2 ppb (35) N/A 19.0 ppb (18) N/A N/A 13.0 ppb (13) N/A N/A 9.4 μg/m3 (40) 40.0
 
Feb. 24, 2021, 5 a.m. N/A 36.0 ppb (34) N/A 22.0 ppb (21) N/A N/A 8.0 ppb (8) N/A N/A 14.4 μg/m3 (56) 56.0
 
Feb. 24, 2021, 4 a.m. N/A 31.7 ppb (30) N/A 18.0 ppb (17) N/A N/A 18.0 ppb (17) N/A N/A 1.9 μg/m3 (8) 30.0
 
Feb. 24, 2021, 3 a.m. N/A 32.3 ppb (31) N/A 20.0 ppb (19) N/A N/A 17.0 ppb (16) N/A N/A 5.8 μg/m3 (25) 31.0
 
Feb. 24, 2021, 2 a.m. N/A 20.2 ppb (20) N/A 20.0 ppb (19) N/A N/A 15.0 ppb (14) N/A N/A 5.4 μg/m3 (23) 23.0
 
Feb. 24, 2021, 1 a.m. N/A 11.5 ppb (11) N/A 11.0 ppb (11) N/A N/A 33.0 ppb (31) N/A N/A 3.4 μg/m3 (15) 31.0
 
Feb. 24, 2021, midnight N/A 7.7 ppb (8) N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) N/A N/A 1.9 μg/m3 (8) 37.0
 
Feb. 23, 2021, 11 p.m. N/A 4.8 ppb (5) N/A 10.0 ppb (10) N/A N/A 38.0 ppb (36) N/A N/A 1.1 μg/m3 (5) 36.0
 
Feb. 23, 2021, 10 p.m. N/A 2.8 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A 1.3 μg/m3 (6) 12.0
 
Feb. 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 2.8 μg/m3 (12) 12.0
 
Feb. 23, 2021, 7 p.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
 
Feb. 23, 2021, 6 p.m. N/A 27.3 ppb (26) N/A 19.0 ppb (18) N/A N/A 21.0 ppb (20) N/A N/A 6.9 μg/m3 (29) 29.0
 
Feb. 23, 2021, 5 p.m. N/A 25.7 ppb (25) N/A 20.0 ppb (19) N/A N/A 19.0 ppb (18) N/A N/A 5.4 μg/m3 (23) 25.0
 
Feb. 23, 2021, 4 p.m. N/A 23.7 ppb (23) N/A 24.0 ppb (23) N/A N/A 9.0 ppb (9) N/A N/A 7.4 μg/m3 (31) 31.0
 
Feb. 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.7 μg/m3 (20) 20.0
 
Feb. 23, 2021, 2 p.m. N/A 16.6 ppb (16) N/A 20.0 ppb (19) N/A N/A 13.0 ppb (13) N/A N/A 3.6 μg/m3 (16) 19.0
 
Feb. 23, 2021, 1 p.m. N/A 15.1 ppb (15) N/A 17.0 ppb (17) N/A N/A 18.0 ppb (17) N/A N/A 3.0 μg/m3 (13) 17.0
 
Feb. 23, 2021, noon N/A 13.9 ppb (14) N/A 16.0 ppb (16) N/A N/A 21.0 ppb (20) N/A N/A 6.2 μg/m3 (26) 26.0
 
Feb. 23, 2021, 11 a.m. N/A 12.8 ppb (13) N/A 13.0 ppb (13) N/A N/A 30.0 ppb (28) N/A N/A 1.3 μg/m3 (6) 28.0
 
Feb. 23, 2021, 10 a.m. N/A 12.2 ppb (12) N/A 13.0 ppb (13) N/A N/A 31.0 ppb (29) N/A N/A 1.1 μg/m3 (5) 29.0
 
Feb. 23, 2021, 9 a.m. N/A 11.4 ppb (11) N/A 12.0 ppb (12) N/A N/A 35.0 ppb (33) N/A N/A 1.3 μg/m3 (6) 33.0
 
Feb. 23, 2021, 8 a.m. N/A 12.0 ppb (12) N/A 11.0 ppb (11) N/A N/A 39.0 ppb (37) N/A N/A 1.1 μg/m3 (5) 37.0
 
Feb. 23, 2021, 7 a.m. N/A 12.5 ppb (12) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 2.0 μg/m3 (9) 36.0
 
Feb. 23, 2021, 6 a.m. N/A 13.4 ppb (13) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
Feb. 23, 2021, 5 a.m. N/A 14.2 ppb (14) N/A 13.0 ppb (13) N/A N/A 35.0 ppb (33) N/A N/A 3.6 μg/m3 (16) 33.0
 
Feb. 23, 2021, 4 a.m. N/A 15.3 ppb (15) N/A 13.0 ppb (13) N/A N/A 37.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
Feb. 23, 2021, 3 a.m. N/A 16.5 ppb (16) N/A 16.0 ppb (16) N/A N/A 31.0 ppb (29) N/A N/A 5.5 μg/m3 (23) 29.0
 
Feb. 23, 2021, 2 a.m. N/A 18.0 ppb (17) N/A 14.0 ppb (14) N/A N/A 37.0 ppb (35) N/A N/A 2.0 μg/m3 (9) 35.0
 
Feb. 23, 2021, 1 a.m. N/A 20.2 ppb (20) N/A 14.0 ppb (14) N/A N/A 40.0 ppb (38) N/A N/A 3.4 μg/m3 (15) 38.0
 
Feb. 23, 2021, midnight N/A 24.5 ppb (24) N/A 13.0 ppb (13) N/A N/A 44.0 ppb (41) N/A N/A 1.8 μg/m3 (8) 41.0
 
Feb. 22, 2021, 11 p.m. N/A 28.0 ppb (27) N/A 13.0 ppb (13) N/A N/A 46.0 ppb (43) N/A N/A 1.4 μg/m3 (6) 43.0
 
Feb. 22, 2021, 10 p.m. N/A 30.5 ppb (29) N/A 14.0 ppb (14) N/A N/A 42.0 ppb (39) N/A N/A 2.1 μg/m3 (9) 39.0
 
Feb. 22, 2021, 9 p.m. N/A 32.4 ppb (31) N/A 14.0 ppb (14) N/A N/A 39.0 ppb (37) N/A N/A 4.2 μg/m3 (18) 37.0
 
Feb. 22, 2021, 8 p.m. N/A 35.7 ppb (34) N/A 16.0 ppb (16) N/A N/A 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 34.0
 
Feb. 22, 2021, 7 p.m. N/A 34.2 ppb (33) N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 33.0
 
Feb. 22, 2021, 6 p.m. N/A 35.5 ppb (34) N/A 13.0 ppb (13) N/A N/A 24.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 34.0
 
Feb. 22, 2021, 5 p.m. N/A 36.2 ppb (35) N/A 14.0 ppb (14) N/A N/A 17.0 ppb (16) N/A N/A 1.9 μg/m3 (8) 35.0
 
Feb. 22, 2021, 4 p.m. N/A 33.5 ppb (32) N/A 14.0 ppb (14) N/A N/A 13.0 ppb (13) N/A N/A 2.8 μg/m3 (12) 32.0