ID: 1168

AQSQID: 000102701

Site Name: Williams Lake Columneetza School

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

Updated: July 26, 2021, 5:55 p.m.

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

Reporting: True, Located: True

Current AQI: 45.0

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
July 26, 2021, 4 p.m. N/A 39.1 ppb (37) N/A N/A N/A N/A 11.0 ppb (11) N/A 10.0 μg/m3 (10) 10.6 μg/m3 (45) 45.0
 
July 26, 2021, 3 p.m. N/A 40.1 ppb (38) N/A N/A N/A N/A 6.0 ppb (6) N/A 11.0 μg/m3 (11) 6.9 μg/m3 (29) 38.0
 
July 26, 2021, 2 p.m. N/A 40.8 ppb (39) N/A N/A N/A N/A 3.0 ppb (3) N/A 8.0 μg/m3 (8) 6.2 μg/m3 (26) 39.0
 
July 26, 2021, 1 p.m. N/A 41.3 ppb (39) N/A N/A N/A N/A 1.0 ppb (1) N/A 9.0 μg/m3 (9) 5.7 μg/m3 (24) 39.0
 
July 26, 2021, noon N/A 40.8 ppb (39) N/A N/A N/A N/A 1.0 ppb (1) N/A 10.0 μg/m3 (10) 5.8 μg/m3 (25) 39.0
 
July 26, 2021, 11 a.m. N/A 40.5 ppb (39) N/A N/A N/A N/A 1.0 ppb (1) N/A 8.0 μg/m3 (8) 6.0 μg/m3 (25) 39.0
 
July 26, 2021, 10 a.m. N/A 40.5 ppb (39) N/A N/A N/A N/A 1.0 ppb (1) N/A 13.0 μg/m3 (13) 6.5 μg/m3 (28) 39.0
 
July 26, 2021, 9 a.m. N/A 39.9 ppb (38) N/A N/A N/A N/A 1.0 ppb (1) N/A 2.0 μg/m3 (2) 6.5 μg/m3 (28) 38.0
 
July 26, 2021, 8 a.m. N/A 38.7 ppb (37) N/A N/A N/A N/A 2.0 ppb (2) N/A 2.0 μg/m3 (2) 6.3 μg/m3 (27) 37.0
 
July 26, 2021, 7 a.m. N/A 37.8 ppb (36) N/A N/A N/A N/A 3.0 ppb (3) N/A 11.0 μg/m3 (11) 6.1 μg/m3 (26) 36.0
 
July 26, 2021, 6 a.m. N/A 36.8 ppb (35) N/A 0.0 ppb (0) N/A N/A 4.0 ppb (4) N/A 18.0 μg/m3 (17) 6.0 μg/m3 (25) 35.0
 
July 26, 2021, 5 a.m. N/A 35.9 ppb (34) N/A 1.0 ppb (1) N/A N/A 7.0 ppb (7) N/A 11.0 μg/m3 (11) 6.0 μg/m3 (25) 34.0
 
July 26, 2021, 4 a.m. N/A 35.0 ppb (34) N/A 2.0 ppb (2) N/A N/A 10.0 ppb (10) N/A 15.0 μg/m3 (14) 6.1 μg/m3 (26) 34.0
 
July 26, 2021, 3 a.m. N/A 34.0 ppb (33) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (18) N/A 5.0 μg/m3 (5) 5.3 μg/m3 (23) 33.0
 
July 26, 2021, 2 a.m. N/A 32.3 ppb (31) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (25) N/A 4.0 μg/m3 (4) 4.5 μg/m3 (19) 31.0
 
July 26, 2021, 1 a.m. N/A 30.0 ppb (29) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (25) N/A 7.0 μg/m3 (7) 4.3 μg/m3 (18) 29.0
 
July 26, 2021, midnight N/A 26.2 ppb (25) N/A 0.0 ppb (0) N/A N/A 26.0 ppb (25) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 25.0
 
July 25, 2021, 11 p.m. N/A 21.5 ppb (21) N/A 0.0 ppb (0) N/A N/A 24.0 ppb (23) N/A 4.0 μg/m3 (4) 4.3 μg/m3 (18) 23.0
 
July 25, 2021, 10 p.m. N/A 18.9 ppb (18) N/A 0.0 ppb (0) N/A N/A 20.0 ppb (19) N/A 10.0 μg/m3 (10) 5.7 μg/m3 (24) 24.0
 
July 25, 2021, 9 p.m. N/A 19.7 ppb (19) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) N/A 28.0 μg/m3 (26) 7.1 μg/m3 (30) 30.0
 
July 25, 2021, 8 p.m. N/A 23.4 ppb (23) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) N/A 24.0 μg/m3 (23) 7.5 μg/m3 (32) 32.0
 
July 25, 2021, 7 p.m. N/A 25.6 ppb (25) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (27) N/A 7.0 μg/m3 (7) 6.3 μg/m3 (27) 27.0
 
July 25, 2021, 6 p.m. N/A 28.3 ppb (27) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (26) N/A 7.0 μg/m3 (7) 5.2 μg/m3 (22) 27.0
 
July 25, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 5.4 μg/m3 (23) 23.0
 
July 25, 2021, 4 p.m. N/A 33.3 ppb (32) N/A 0.0 ppb (0) N/A N/A 25.0 ppb (24) N/A 26.0 μg/m3 (25) 7.7 μg/m3 (33) 33.0
 
July 25, 2021, 3 p.m. N/A 34.4 ppb (33) N/A -1.0 ppb (0) N/A N/A 19.0 ppb (18) N/A 29.0 μg/m3 (27) 8.8 μg/m3 (37) 37.0
 
July 25, 2021, 2 p.m. N/A 33.1 ppb (32) N/A -1.0 ppb (0) N/A N/A 15.0 ppb (14) N/A 29.0 μg/m3 (27) 10.5 μg/m3 (44) 44.0
 
July 25, 2021, 1 p.m. N/A 31.1 ppb (30) N/A -1.0 ppb (0) N/A N/A 10.0 ppb (10) N/A 18.0 μg/m3 (17) 9.6 μg/m3 (40) 40.0
 
July 25, 2021, noon N/A 28.4 ppb (27) N/A -1.0 ppb (0) N/A N/A 10.0 ppb (10) N/A 11.0 μg/m3 (11) 6.8 μg/m3 (29) 29.0
 
July 25, 2021, 11 a.m. N/A 26.0 ppb (25) N/A -1.0 ppb (0) N/A N/A 15.0 ppb (14) N/A 14.0 μg/m3 (13) 7.2 μg/m3 (31) 31.0
 
July 25, 2021, 10 a.m. N/A 23.5 ppb (23) N/A 0.0 ppb (0) N/A N/A 21.0 ppb (20) N/A 14.0 μg/m3 (13) 7.1 μg/m3 (30) 30.0
 
July 25, 2021, 9 a.m. N/A 22.0 ppb (21) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) N/A 17.0 μg/m3 (16) 8.5 μg/m3 (36) 36.0
 
July 25, 2021, 8 a.m. N/A 21.7 ppb (21) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (24) N/A 21.0 μg/m3 (20) 7.3 μg/m3 (31) 31.0
 
July 25, 2021, 7 a.m. N/A 21.1 ppb (20) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (25) N/A 16.0 μg/m3 (15) 5.6 μg/m3 (24) 25.0
 
July 25, 2021, 6 a.m. N/A 22.1 ppb (21) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (24) N/A 17.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
July 25, 2021, 5 a.m. N/A 22.3 ppb (22) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (22) N/A 14.0 μg/m3 (13) 6.7 μg/m3 (28) 28.0
 
July 25, 2021, 4 a.m. N/A 20.1 ppb (19) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (24) N/A 12.0 μg/m3 (12) 7.4 μg/m3 (31) 31.0
 
July 25, 2021, 3 a.m. N/A 18.1 ppb (18) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A 8.0 μg/m3 (8) 7.6 μg/m3 (32) 32.0
 
July 25, 2021, 2 a.m. N/A 19.2 ppb (19) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A 8.0 μg/m3 (8) 7.8 μg/m3 (33) 34.0
 
July 25, 2021, 1 a.m. N/A 21.0 ppb (20) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) 7.4 μg/m3 (31) 35.0
 
July 25, 2021, midnight N/A 23.4 ppb (23) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) N/A 7.0 μg/m3 (7) 6.0 μg/m3 (25) 32.0
 
July 24, 2021, 11 p.m. N/A 25.3 ppb (24) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A 8.0 μg/m3 (8) 5.3 μg/m3 (23) 31.0
 
July 24, 2021, 10 p.m. N/A 26.3 ppb (25) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A 4.0 μg/m3 (4) 4.7 μg/m3 (20) 31.0
 
July 24, 2021, 9 p.m. N/A 28.9 ppb (28) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 31.0
 
July 24, 2021, 8 p.m. N/A 30.0 ppb (29) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A 5.0 μg/m3 (5) 6.5 μg/m3 (28) 31.0
 
July 24, 2021, 7 p.m. N/A 32.5 ppb (31) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) N/A 5.0 μg/m3 (5) 6.1 μg/m3 (26) 31.0
 
July 24, 2021, 6 p.m. N/A 34.2 ppb (33) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 6.3 μg/m3 (27) 33.0
 
July 24, 2021, 5 p.m. N/A 37.5 ppb (36) N/A 0.0 ppb (0) N/A N/A 27.0 ppb (25) N/A 14.0 μg/m3 (13) 5.2 μg/m3 (22) 36.0
 
July 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 5.9 μg/m3 (25) 25.0
 
July 24, 2021, 3 p.m. N/A 38.3 ppb (37) N/A N/A N/A N/A 17.0 ppb (16) N/A 14.0 μg/m3 (13) 5.5 μg/m3 (23) 37.0
 
July 24, 2021, 2 p.m. N/A 38.1 ppb (36) N/A N/A N/A N/A 14.0 ppb (13) N/A 13.0 μg/m3 (13) 5.6 μg/m3 (24) 36.0
 
July 24, 2021, 1 p.m. N/A 37.8 ppb (36) N/A N/A N/A N/A 10.0 ppb (10) N/A 10.0 μg/m3 (10) 5.3 μg/m3 (23) 36.0
 
July 24, 2021, noon N/A 37.1 ppb (35) N/A N/A N/A N/A 10.0 ppb (10) N/A 11.0 μg/m3 (11) 5.4 μg/m3 (23) 35.0
 
July 24, 2021, 11 a.m. N/A 36.0 ppb (34) N/A N/A N/A N/A 13.0 ppb (13) N/A 14.0 μg/m3 (13) 5.4 μg/m3 (23) 34.0
 
July 24, 2021, 10 a.m. N/A 34.5 ppb (33) N/A N/A N/A N/A 13.0 ppb (13) N/A 16.0 μg/m3 (15) 4.8 μg/m3 (20) 33.0
 
July 24, 2021, 9 a.m. N/A 32.3 ppb (31) N/A 0.0 ppb (0) N/A N/A 12.0 ppb (12) N/A 16.0 μg/m3 (15) 5.8 μg/m3 (25) 31.0
 
July 24, 2021, 8 a.m. N/A 29.6 ppb (28) N/A 0.0 ppb (0) N/A N/A 15.0 ppb (14) N/A 13.0 μg/m3 (13) 4.0 μg/m3 (17) 28.0
 
July 24, 2021, 7 a.m. N/A 26.7 ppb (26) N/A 1.0 ppb (1) N/A N/A 16.0 ppb (15) N/A 17.0 μg/m3 (16) 3.4 μg/m3 (15) 26.0
 
July 24, 2021, 6 a.m. N/A 25.7 ppb (25) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) N/A 28.0 μg/m3 (26) 4.0 μg/m3 (17) 26.0
 
July 24, 2021, 5 a.m. N/A 26.6 ppb (26) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) N/A 23.0 μg/m3 (22) 4.7 μg/m3 (20) 26.0
 
July 24, 2021, 4 a.m. N/A 27.5 ppb (26) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (26) N/A 15.0 μg/m3 (14) 5.0 μg/m3 (21) 26.0
 
July 24, 2021, 3 a.m. N/A 27.9 ppb (27) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (26) N/A 11.0 μg/m3 (11) 5.8 μg/m3 (25) 27.0
 
July 24, 2021, 2 a.m. N/A 26.0 ppb (25) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (27) N/A 7.0 μg/m3 (7) 6.3 μg/m3 (27) 27.0
 
July 24, 2021, 1 a.m. N/A 26.6 ppb (26) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (28) N/A 7.0 μg/m3 (7) 5.2 μg/m3 (22) 28.0
 
July 24, 2021, midnight N/A 28.6 ppb (27) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) N/A 10.0 μg/m3 (10) 6.8 μg/m3 (29) 30.0
 
July 23, 2021, 11 p.m. N/A 27.9 ppb (27) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 6.2 μg/m3 (26) 30.0
 
July 23, 2021, 10 p.m. N/A 28.9 ppb (28) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) N/A 6.0 μg/m3 (6) 5.6 μg/m3 (24) 31.0
 
July 23, 2021, 9 p.m. N/A 30.2 ppb (29) N/A 0.0 ppb (0) N/A N/A 30.0 ppb (28) N/A 4.0 μg/m3 (4) 4.8 μg/m3 (20) 29.0
 
July 23, 2021, 8 p.m. N/A 32.4 ppb (31) N/A 0.0 ppb (0) N/A N/A 28.0 ppb (26) N/A 6.0 μg/m3 (6) 3.1 μg/m3 (13) 31.0
 
July 23, 2021, 7 p.m. N/A 32.4 ppb (31) N/A 0.0 ppb (0) N/A N/A 26.0 ppb (25) N/A 8.0 μg/m3 (8) 3.2 μg/m3 (14) 31.0
 
July 23, 2021, 6 p.m. N/A 32.4 ppb (31) N/A 0.0 ppb (0) N/A N/A 25.0 ppb (24) N/A 14.0 μg/m3 (13) 3.9 μg/m3 (17) 31.0
 
July 23, 2021, 5 p.m. N/A 33.7 ppb (32) N/A 0.0 ppb (0) N/A N/A 23.0 ppb (22) N/A 15.0 μg/m3 (14) 5.3 μg/m3 (23) 32.0
 
July 23, 2021, 4 p.m. N/A 34.3 ppb (33) N/A 0.0 ppb (0) N/A N/A 19.0 ppb (18) N/A 29.0 μg/m3 (27) 6.2 μg/m3 (26) 33.0
 
July 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 30.0 μg/m3 (28) 7.6 μg/m3 (32) 32.0
 
July 23, 2021, 2 p.m. N/A 32.3 ppb (31) N/A -1.0 ppb (0) N/A N/A 13.0 ppb (13) N/A N/A 6.7 μg/m3 (28) 31.0
 
July 23, 2021, 1 p.m. N/A 30.5 ppb (29) N/A 0.0 ppb (0) N/A N/A 8.0 ppb (8) N/A N/A 6.2 μg/m3 (26) 29.0
 
July 23, 2021, noon N/A 27.9 ppb (27) N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 6.3 μg/m3 (27) 27.0
 
July 23, 2021, 11 a.m. N/A 26.1 ppb (25) N/A -1.0 ppb (0) N/A N/A 10.0 ppb (10) N/A N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 10 a.m. N/A 23.8 ppb (23) N/A 0.0 ppb (0) N/A N/A 15.0 ppb (14) N/A N/A 11.9 μg/m3 (50) 50.0
 
July 23, 2021, 9 a.m. N/A 22.3 ppb (22) N/A -1.0 ppb (0) N/A N/A 18.0 ppb (17) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 23, 2021, 8 a.m. N/A 20.7 ppb (20) N/A -1.0 ppb (0) N/A N/A 21.0 ppb (20) N/A N/A 7.9 μg/m3 (33) 33.0
 
July 23, 2021, 7 a.m. N/A 20.5 ppb (20) N/A -1.0 ppb (0) N/A N/A 26.0 ppb (25) N/A N/A 5.3 μg/m3 (23) 25.0
 
July 23, 2021, 6 a.m. N/A 22.5 ppb (22) N/A 0.0 ppb (0) N/A N/A 22.0 ppb (21) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 23, 2021, 5 a.m. N/A 22.4 ppb (22) N/A 1.0 ppb (1) N/A N/A 14.0 ppb (13) N/A N/A 6.4 μg/m3 (27) 27.0
 
July 23, 2021, 4 a.m. N/A 20.6 ppb (20) N/A 0.0 ppb (0) N/A N/A 17.0 ppb (16) N/A N/A 7.6 μg/m3 (32) 32.0
 
July 23, 2021, 3 a.m. N/A 19.2 ppb (19) N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 8.4 μg/m3 (36) 36.0
 
July 23, 2021, 2 a.m. N/A 18.1 ppb (18) N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
July 23, 2021, 1 a.m. N/A 16.3 ppb (16) N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 6.1 μg/m3 (26) 26.0
 
July 23, 2021, midnight N/A 14.2 ppb (14) N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 22, 2021, 11 p.m. N/A 11.9 ppb (12) N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 3.4 μg/m3 (15) 25.0
 
July 22, 2021, 10 p.m. N/A 9.5 ppb (9) N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 2.3 μg/m3 (10) 25.0
 
July 22, 2021, 9 p.m. N/A 6.0 ppb (6) N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 1.5 μg/m3 (7) 24.0
 
July 22, 2021, 8 p.m. N/A 1.6 ppb (2) N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 1.4 μg/m3 (6) 24.0
 
July 22, 2021, 7 p.m. N/A 22.1 ppb (21) N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 1.6 μg/m3 (7) 23.0
 
July 22, 2021, 6 p.m. N/A 31.5 ppb (30) N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.4 μg/m3 (6) 30.0
 
July 22, 2021, 5 p.m. N/A 33.1 ppb (32) N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 1.6 μg/m3 (7) 32.0
 
July 22, 2021, 4 p.m. N/A 33.8 ppb (32) N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.9 μg/m3 (13) 32.0
 
July 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
July 22, 2021, 1 p.m. N/A 30.7 ppb (29) N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 2.2 μg/m3 (10) 29.0
 
July 22, 2021, noon N/A 29.1 ppb (28) N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 2.2 μg/m3 (10) 28.0
 
July 22, 2021, 11 a.m. N/A 28.7 ppb (28) N/A 0.0 ppb (0) N/A N/A 9.0 ppb (9) N/A N/A 3.2 μg/m3 (14) 28.0
 
July 22, 2021, 10 a.m. N/A 28.1 ppb (27) N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 7.3 μg/m3 (31) 31.0
 
July 22, 2021, 9 a.m. N/A 27.5 ppb (26) N/A -1.0 ppb (0) N/A N/A 14.0 ppb (13) N/A N/A 5.7 μg/m3 (24) 26.0
 
July 22, 2021, 8 a.m. N/A 27.3 ppb (26) N/A 0.0 ppb (0) N/A N/A 14.0 ppb (13) N/A N/A 6.2 μg/m3 (26) 26.0
 
July 22, 2021, 7 a.m. N/A 26.5 ppb (25) N/A 0.0 ppb (0) N/A N/A 17.0 ppb (16) N/A N/A 6.3 μg/m3 (27) 27.0
 
July 22, 2021, 6 a.m. N/A 25.2 ppb (24) N/A 0.0 ppb (0) N/A N/A 18.0 ppb (17) N/A N/A 5.7 μg/m3 (24) 24.0
 
July 22, 2021, 5 a.m. N/A 24.5 ppb (24) N/A 0.0 ppb (0) N/A N/A 19.0 ppb (18) N/A N/A 3.9 μg/m3 (17) 24.0
 
July 22, 2021, 4 a.m. N/A 24.9 ppb (24) N/A 0.0 ppb (0) N/A N/A 22.0 ppb (21) N/A N/A 4.5 μg/m3 (19) 24.0
 
July 22, 2021, 3 a.m. N/A 25.5 ppb (25) N/A -1.0 ppb (0) N/A N/A 26.0 ppb (25) N/A N/A 3.0 μg/m3 (13) 25.0
 
July 22, 2021, 2 a.m. N/A 27.4 ppb (26) N/A 0.0 ppb (0) N/A N/A 27.0 ppb (25) N/A N/A 2.7 μg/m3 (12) 26.0
 
July 22, 2021, 1 a.m. N/A 27.7 ppb (27) N/A 0.0 ppb (0) N/A N/A 29.0 ppb (27) N/A N/A 2.9 μg/m3 (13) 27.0
 
July 22, 2021, midnight N/A 30.1 ppb (29) N/A 0.0 ppb (0) N/A N/A 27.0 ppb (25) N/A N/A 2.5 μg/m3 (11) 29.0
 
July 21, 2021, 11 p.m. N/A 29.4 ppb (28) N/A 0.0 ppb (0) N/A N/A 27.0 ppb (25) N/A N/A 3.0 μg/m3 (13) 28.0
 
July 21, 2021, 8 p.m. N/A 32.5 ppb (31) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) N/A N/A 3.2 μg/m3 (14) 31.0
 
July 21, 2021, 7 p.m. N/A 32.3 ppb (31) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (27) N/A N/A 2.7 μg/m3 (12) 31.0
 
July 21, 2021, 6 p.m. N/A 32.4 ppb (31) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 2.5 μg/m3 (11) 31.0
 
July 21, 2021, 4 p.m. N/A 31.6 ppb (30) N/A -1.0 ppb (0) N/A N/A 27.0 ppb (25) N/A N/A 1.6 μg/m3 (7) 30.0
 
July 21, 2021, 3 p.m. N/A 31.0 ppb (30) N/A 0.0 ppb (0) N/A N/A 24.0 ppb (23) N/A N/A 1.5 μg/m3 (7) 30.0
 
July 21, 2021, 2 p.m. N/A 31.4 ppb (30) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (20) N/A N/A 4.2 μg/m3 (18) 30.0
 
July 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.1 μg/m3 (9) 9.0
 
July 21, 2021, noon N/A 29.5 ppb (28) N/A 0.0 ppb (0) N/A N/A 24.0 ppb (23) N/A N/A 1.7 μg/m3 (8) 28.0
 
July 21, 2021, 11 a.m. N/A 28.5 ppb (27) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (24) N/A N/A 1.8 μg/m3 (8) 27.0
 
July 21, 2021, 10 a.m. N/A 28.1 ppb (27) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 27.0
 
July 21, 2021, 9 a.m. N/A 28.2 ppb (27) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (28) N/A N/A 2.9 μg/m3 (13) 28.0
 
July 21, 2021, 8 a.m. N/A 28.0 ppb (27) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
July 21, 2021, 7 a.m. N/A 25.8 ppb (25) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 3.9 μg/m3 (17) 31.0
 
July 21, 2021, 6 a.m. N/A 25.1 ppb (24) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 5.6 μg/m3 (24) 30.0
 
July 21, 2021, 5 a.m. N/A 25.2 ppb (24) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 4.4 μg/m3 (19) 33.0
 
July 21, 2021, 4 a.m. N/A 25.7 ppb (25) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 4.4 μg/m3 (19) 32.0
 
July 21, 2021, 3 a.m. N/A 25.3 ppb (24) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 4.4 μg/m3 (19) 33.0
 
July 21, 2021, 2 a.m. N/A 26.2 ppb (25) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) N/A N/A 5.7 μg/m3 (24) 34.0
 
July 21, 2021, 1 a.m. N/A 26.5 ppb (25) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) N/A N/A 5.9 μg/m3 (25) 40.0
 
July 21, 2021, midnight N/A 27.9 ppb (27) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) N/A N/A 4.1 μg/m3 (18) 41.0
 
July 20, 2021, 11 p.m. N/A 29.1 ppb (28) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) N/A N/A 3.5 μg/m3 (15) 42.0
 
July 20, 2021, 10 p.m. N/A 30.6 ppb (29) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) N/A N/A 3.4 μg/m3 (15) 41.0
 
July 20, 2021, 9 p.m. N/A 32.5 ppb (31) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) N/A N/A 3.8 μg/m3 (16) 39.0
 
July 20, 2021, 8 p.m. N/A 34.5 ppb (33) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 4.6 μg/m3 (20) 38.0
 
July 20, 2021, 7 p.m. N/A 35.2 ppb (34) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
July 20, 2021, 6 p.m. N/A 35.4 ppb (34) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 2.9 μg/m3 (13) 34.0
 
July 20, 2021, 5 p.m. N/A 35.6 ppb (34) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (27) N/A N/A 4.9 μg/m3 (21) 34.0
 
July 20, 2021, 4 p.m. N/A 36.0 ppb (34) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (25) N/A N/A 9.8 μg/m3 (41) 41.0
 
July 20, 2021, 3 p.m. N/A 36.8 ppb (35) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (18) N/A N/A 11.1 μg/m3 (47) 47.0
 
July 20, 2021, 2 p.m. N/A 36.2 ppb (35) N/A 1.0 ppb (1) N/A N/A 15.0 ppb (14) N/A N/A 12.6 μg/m3 (53) 53.0
 
July 20, 2021, 1 p.m. N/A 34.4 ppb (33) N/A 1.0 ppb (1) N/A N/A 8.0 ppb (8) N/A N/A 13.9 μg/m3 (55) 55.0
 
July 20, 2021, noon 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
 
July 20, 2021, 11 a.m. N/A 30.7 ppb (29) N/A 1.0 ppb (1) N/A N/A 9.0 ppb (9) N/A N/A 12.1 μg/m3 (51) 51.0
 
July 20, 2021, 10 a.m. N/A 29.3 ppb (28) N/A 1.0 ppb (1) N/A N/A 13.0 ppb (13) N/A N/A 12.4 μg/m3 (52) 52.0
 
July 20, 2021, 9 a.m. N/A 28.5 ppb (27) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (14) N/A N/A 9.9 μg/m3 (42) 42.0
 
July 20, 2021, 8 a.m. N/A 27.7 ppb (27) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (18) N/A N/A 7.1 μg/m3 (30) 30.0
 
July 20, 2021, 7 a.m. N/A 27.4 ppb (26) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (25) N/A N/A 7.1 μg/m3 (30) 30.0
 
July 20, 2021, 6 a.m. N/A 26.8 ppb (26) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) N/A N/A 17.5 μg/m3 (63) 63.0
 
July 20, 2021, 5 a.m. N/A 27.1 ppb (26) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) N/A N/A 34.6 μg/m3 (99) 99.0
 
July 20, 2021, 4 a.m. N/A 26.2 ppb (25) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) N/A N/A 33.3 μg/m3 (96) 96.0
 
July 20, 2021, 3 a.m. N/A 28.1 ppb (27) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (38) N/A N/A 44.7 μg/m3 (124) 124.0
 
July 20, 2021, 2 a.m. N/A 29.4 ppb (28) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (45) N/A N/A 89.7 μg/m3 (169) 169.0
 
July 20, 2021, 1 a.m. N/A 31.9 ppb (31) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (44) N/A N/A 69.0 μg/m3 (158) 158.0
 
July 20, 2021, midnight N/A 34.0 ppb (33) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) N/A N/A 50.2 μg/m3 (138) 138.0
 
July 19, 2021, 11 p.m. N/A 35.7 ppb (34) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 19.1 μg/m3 (66) 66.0
 
July 19, 2021, 10 p.m. N/A 37.1 ppb (35) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 8.6 μg/m3 (36) 36.0
 
July 19, 2021, 9 p.m. N/A 38.3 ppb (37) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 7.0 μg/m3 (30) 37.0
 
July 19, 2021, 8 p.m. N/A 39.3 ppb (38) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 38.0
 
July 19, 2021, 7 p.m. N/A 39.4 ppb (38) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (28) N/A N/A 7.3 μg/m3 (31) 38.0
 
July 19, 2021, 6 p.m. N/A 39.2 ppb (37) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (26) N/A N/A 7.4 μg/m3 (31) 37.0
 
July 19, 2021, 5 p.m. N/A 40.5 ppb (39) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (22) N/A N/A 10.2 μg/m3 (43) 43.0
 
July 19, 2021, 4 p.m. N/A 41.1 ppb (39) N/A -1.0 ppb (0) N/A N/A 17.0 ppb (16) N/A N/A 10.4 μg/m3 (44) 44.0
 
July 19, 2021, 3 p.m. N/A 41.7 ppb (40) N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 8.6 μg/m3 (36) 40.0
 
July 19, 2021, 2 p.m. N/A 41.1 ppb (39) N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 6.5 μg/m3 (28) 39.0
 
July 19, 2021, 1 p.m. N/A 39.1 ppb (37) N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 5.0 μg/m3 (21) 37.0