ID: 1168

AQSQID: 000102701

Site Name: Williams Lake Columneetza School

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

Updated: May 17, 2021, 8:50 p.m.

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

Reporting: True, Located: True

Current AQI: 36.0

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
May 17, 2021, 6 p.m. N/A 37.8 ppb (36) N/A 10.0 ppb (10) N/A N/A 31.0 ppb (29) N/A N/A 3.9 μg/m3 (17) 36.0
 
May 17, 2021, 5 p.m. N/A 38.2 ppb (37) N/A 10.0 ppb (10) N/A N/A 32.0 ppb (30) N/A N/A 5.8 μg/m3 (25) 37.0
 
May 17, 2021, 4 p.m. N/A 38.2 ppb (37) N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 37.0
 
May 17, 2021, noon N/A 46.3 ppb (44) N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) N/A N/A 2.1 μg/m3 (9) 44.0
 
May 17, 2021, 11 a.m. N/A 46.6 ppb (44) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (16) N/A N/A 2.2 μg/m3 (10) 44.0
 
May 17, 2021, 10 a.m. N/A 45.7 ppb (44) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) N/A N/A 2.7 μg/m3 (12) 44.0
 
May 17, 2021, 5 a.m. N/A 40.3 ppb (39) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (19) N/A N/A 2.7 μg/m3 (12) 39.0
 
May 17, 2021, 4 a.m. N/A 40.2 ppb (38) N/A 7.0 ppb (7) N/A N/A 21.0 ppb (20) N/A N/A 2.8 μg/m3 (12) 38.0
 
May 16, 2021, 11 p.m. N/A 53.3 ppb (51) N/A 9.0 ppb (9) N/A N/A 28.0 ppb (26) N/A N/A 3.4 μg/m3 (15) 51.0
 
May 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 16, 2021, 5 p.m. N/A 58.8 ppb (57) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (20) N/A N/A 1.7 μg/m3 (8) 57.0
 
May 16, 2021, 4 p.m. N/A 58.9 ppb (57) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (14) N/A N/A 2.1 μg/m3 (9) 57.0
 
May 16, 2021, 10 a.m. N/A 49.6 ppb (47) N/A 5.0 ppb (5) N/A N/A 7.0 ppb (7) N/A N/A 5.1 μg/m3 (22) 47.0
 
May 16, 2021, 9 a.m. N/A 45.7 ppb (44) N/A 6.0 ppb (6) N/A N/A 11.0 ppb (11) N/A N/A 5.1 μg/m3 (22) 44.0
 
May 16, 2021, 8 a.m. N/A 41.7 ppb (40) N/A 7.0 ppb (7) N/A N/A 12.0 ppb (12) N/A N/A 4.7 μg/m3 (20) 40.0
 
May 16, 2021, 7 a.m. N/A 37.8 ppb (36) N/A 8.0 ppb (8) N/A N/A 17.0 ppb (16) N/A N/A 2.6 μg/m3 (11) 36.0
 
May 16, 2021, 6 a.m. N/A 33.9 ppb (32) N/A 7.0 ppb (7) N/A N/A 22.0 ppb (21) N/A N/A 1.5 μg/m3 (7) 32.0
 
May 16, 2021, 5 a.m. N/A 30.6 ppb (29) N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) N/A N/A 1.7 μg/m3 (8) 29.0
 
May 16, 2021, 4 a.m. N/A 28.7 ppb (28) N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) N/A N/A 2.1 μg/m3 (9) 28.0
 
May 16, 2021, 3 a.m. N/A 28.0 ppb (27) N/A 8.0 ppb (8) N/A N/A 28.0 ppb (26) N/A N/A 2.3 μg/m3 (10) 27.0
 
May 16, 2021, 2 a.m. N/A 29.7 ppb (29) N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) N/A N/A 3.7 μg/m3 (16) 32.0
 
May 16, 2021, 1 a.m. N/A 31.5 ppb (30) N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) N/A N/A 4.3 μg/m3 (18) 35.0
 
May 16, 2021, midnight N/A 32.0 ppb (31) N/A 10.0 ppb (10) N/A N/A 38.0 ppb (36) N/A N/A 4.6 μg/m3 (20) 36.0
 
May 15, 2021, 11 p.m. N/A 33.6 ppb (32) N/A 11.0 ppb (11) N/A N/A 40.0 ppb (38) N/A N/A 4.7 μg/m3 (20) 38.0
 
May 15, 2021, 10 p.m. N/A 36.5 ppb (35) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
May 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.9 μg/m3 (21) 21.0
 
May 15, 2021, 8 p.m. N/A 42.0 ppb (40) N/A 11.0 ppb (11) N/A N/A 43.0 ppb (40) N/A N/A 4.2 μg/m3 (18) 40.0
 
May 15, 2021, 7 p.m. N/A 43.5 ppb (42) N/A 11.0 ppb (11) N/A N/A 44.0 ppb (41) N/A N/A 3.9 μg/m3 (17) 42.0
 
May 15, 2021, 6 p.m. N/A 44.2 ppb (42) N/A 10.0 ppb (10) N/A N/A 44.0 ppb (41) N/A N/A 3.0 μg/m3 (13) 42.0
 
May 15, 2021, 5 p.m. N/A 44.0 ppb (42) N/A 8.0 ppb (8) N/A N/A 34.0 ppb (32) N/A N/A 3.2 μg/m3 (14) 42.0
 
May 15, 2021, 4 p.m. N/A 42.5 ppb (41) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (23) N/A N/A 3.2 μg/m3 (14) 41.0
 
May 15, 2021, 3 p.m. N/A 39.8 ppb (38) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (16) N/A N/A 3.4 μg/m3 (15) 38.0
 
May 15, 2021, 2 p.m. N/A 38.0 ppb (36) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (13) N/A N/A 3.5 μg/m3 (15) 36.0
 
May 15, 2021, 1 p.m. N/A 36.6 ppb (35) N/A 6.0 ppb (6) N/A N/A 7.0 ppb (7) N/A N/A 6.9 μg/m3 (29) 35.0
 
May 15, 2021, noon N/A 35.9 ppb (34) N/A 6.0 ppb (6) N/A N/A 7.0 ppb (7) N/A N/A 8.0 μg/m3 (34) 34.0
 
May 15, 2021, 11 a.m. N/A 35.3 ppb (34) N/A 6.0 ppb (6) N/A N/A 7.0 ppb (7) N/A N/A 8.2 μg/m3 (35) 35.0
 
May 15, 2021, 10 a.m. N/A 34.9 ppb (33) N/A 8.0 ppb (8) N/A N/A 8.0 ppb (8) N/A N/A 9.9 μg/m3 (42) 42.0
 
May 15, 2021, 9 a.m. N/A 33.7 ppb (32) N/A 8.0 ppb (8) N/A N/A 10.0 ppb (10) N/A N/A 11.1 μg/m3 (47) 47.0
 
May 15, 2021, 8 a.m. N/A 31.5 ppb (30) N/A 9.0 ppb (9) N/A N/A 13.0 ppb (13) N/A N/A 8.0 μg/m3 (34) 34.0
 
May 15, 2021, 7 a.m. N/A 30.4 ppb (29) N/A 8.0 ppb (8) N/A N/A 19.0 ppb (18) N/A N/A 6.0 μg/m3 (25) 29.0
 
May 15, 2021, 6 a.m. N/A 29.7 ppb (29) N/A 10.0 ppb (10) N/A N/A 18.0 ppb (17) N/A N/A 3.4 μg/m3 (15) 29.0
 
May 15, 2021, 5 a.m. N/A 29.2 ppb (28) N/A 12.0 ppb (12) N/A N/A 20.0 ppb (19) N/A N/A 3.1 μg/m3 (13) 28.0
 
May 15, 2021, 4 a.m. N/A 29.0 ppb (28) N/A 12.0 ppb (12) N/A N/A 21.0 ppb (20) N/A N/A 3.2 μg/m3 (14) 28.0
 
May 15, 2021, 3 a.m. N/A 29.5 ppb (28) N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) N/A N/A 3.2 μg/m3 (14) 35.0
 
May 15, 2021, 2 a.m. N/A 31.3 ppb (30) N/A 10.0 ppb (10) N/A N/A 41.0 ppb (38) N/A N/A 3.2 μg/m3 (14) 38.0
 
May 15, 2021, 1 a.m. N/A 34.7 ppb (33) N/A 11.0 ppb (11) N/A N/A 42.0 ppb (39) N/A N/A 3.3 μg/m3 (14) 39.0
 
May 15, 2021, midnight N/A 36.8 ppb (35) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 3.7 μg/m3 (16) 38.0
 
May 14, 2021, 11 p.m. N/A 38.9 ppb (37) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 3.7 μg/m3 (16) 38.0
 
May 14, 2021, 10 p.m. N/A 41.8 ppb (40) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 3.9 μg/m3 (17) 40.0
 
May 14, 2021, 9 p.m. N/A 44.5 ppb (42) N/A 12.0 ppb (12) N/A N/A 41.0 ppb (38) N/A N/A 3.9 μg/m3 (17) 42.0
 
May 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.4 μg/m3 (15) 15.0
 
May 14, 2021, 7 p.m. N/A 48.3 ppb (46) N/A 11.0 ppb (11) N/A N/A 40.0 ppb (38) N/A N/A 3.2 μg/m3 (14) 46.0
 
May 14, 2021, 6 p.m. N/A 48.9 ppb (47) N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) N/A N/A 3.3 μg/m3 (14) 47.0
 
May 14, 2021, 5 p.m. N/A 49.3 ppb (47) N/A 10.0 ppb (10) N/A N/A 31.0 ppb (29) N/A N/A 2.3 μg/m3 (10) 47.0
 
May 14, 2021, 4 p.m. N/A 48.7 ppb (46) N/A 9.0 ppb (9) N/A N/A 25.0 ppb (24) N/A N/A 3.3 μg/m3 (14) 46.0
 
May 14, 2021, 3 p.m. N/A 46.6 ppb (44) N/A 7.0 ppb (7) N/A N/A 21.0 ppb (20) N/A N/A 4.9 μg/m3 (21) 44.0
 
May 14, 2021, 2 p.m. N/A 45.3 ppb (43) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (14) N/A N/A 2.5 μg/m3 (11) 43.0
 
May 14, 2021, 1 p.m. N/A 44.4 ppb (42) N/A 7.0 ppb (7) N/A N/A 6.0 ppb (6) N/A N/A 2.7 μg/m3 (12) 42.0
 
May 14, 2021, noon N/A 41.4 ppb (40) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (8) N/A N/A 2.2 μg/m3 (10) 40.0
 
May 14, 2021, 11 a.m. N/A 39.2 ppb (37) N/A 8.0 ppb (8) N/A N/A 11.0 ppb (11) N/A N/A 1.9 μg/m3 (8) 37.0
 
May 14, 2021, 10 a.m. N/A 35.2 ppb (34) N/A 8.0 ppb (8) N/A N/A 16.0 ppb (15) N/A N/A 3.3 μg/m3 (14) 34.0
 
May 14, 2021, 9 a.m. N/A 30.2 ppb (29) N/A 8.0 ppb (8) N/A N/A 18.0 ppb (17) N/A N/A 2.0 μg/m3 (9) 29.0
 
May 14, 2021, 8 a.m. N/A 26.0 ppb (25) N/A 9.0 ppb (9) N/A N/A 26.0 ppb (25) N/A N/A 3.2 μg/m3 (14) 25.0
 
May 14, 2021, 7 a.m. N/A 23.5 ppb (23) N/A 9.0 ppb (9) N/A N/A 34.0 ppb (32) N/A N/A 2.8 μg/m3 (12) 32.0
 
May 14, 2021, 6 a.m. N/A 23.5 ppb (23) N/A 9.0 ppb (9) N/A N/A 38.0 ppb (36) N/A N/A 2.2 μg/m3 (10) 36.0
 
May 14, 2021, 5 a.m. N/A 24.1 ppb (23) N/A 9.0 ppb (9) N/A N/A 37.0 ppb (35) N/A N/A 3.7 μg/m3 (16) 35.0
 
May 14, 2021, 4 a.m. N/A 24.6 ppb (24) N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) N/A N/A 3.1 μg/m3 (13) 28.0
 
May 14, 2021, 3 a.m. N/A 24.7 ppb (24) N/A 10.0 ppb (10) N/A N/A 35.0 ppb (33) N/A N/A 5.5 μg/m3 (23) 33.0
 
May 14, 2021, 2 a.m. N/A 28.5 ppb (27) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 3.4 μg/m3 (15) 37.0
 
May 14, 2021, 1 a.m. N/A 31.0 ppb (30) N/A 11.0 ppb (11) N/A N/A 40.0 ppb (38) N/A N/A 4.3 μg/m3 (18) 38.0
 
May 14, 2021, midnight N/A 33.3 ppb (32) N/A 11.0 ppb (11) N/A N/A 42.0 ppb (39) N/A N/A 4.2 μg/m3 (18) 39.0
 
May 13, 2021, 11 p.m. N/A 36.1 ppb (35) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 5.3 μg/m3 (23) 38.0
 
May 13, 2021, 10 p.m. N/A 39.1 ppb (37) N/A 11.0 ppb (11) N/A N/A 42.0 ppb (39) N/A N/A 4.3 μg/m3 (18) 39.0
 
May 13, 2021, 9 p.m. N/A 42.7 ppb (41) N/A 11.0 ppb (11) N/A N/A 40.0 ppb (38) N/A N/A 3.7 μg/m3 (16) 41.0
 
May 13, 2021, 8 p.m. N/A 45.2 ppb (43) N/A 10.0 ppb (10) N/A N/A 37.0 ppb (35) N/A N/A 3.9 μg/m3 (17) 43.0
 
May 13, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 13, 2021, 6 p.m. N/A 50.4 ppb (48) N/A 8.0 ppb (8) N/A N/A 28.0 ppb (26) N/A N/A 4.7 μg/m3 (20) 48.0
 
May 13, 2021, 5 p.m. N/A 51.1 ppb (49) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (22) N/A N/A 2.7 μg/m3 (12) 49.0
 
May 13, 2021, 4 p.m. N/A 53.3 ppb (51) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (13) N/A N/A 3.2 μg/m3 (14) 51.0
 
May 13, 2021, 3 p.m. N/A 51.6 ppb (49) N/A 4.0 ppb (4) N/A N/A 9.0 ppb (9) N/A N/A 2.0 μg/m3 (9) 49.0
 
May 13, 2021, 2 p.m. N/A 49.7 ppb (47) N/A 4.0 ppb (4) N/A N/A 5.0 ppb (5) N/A N/A 2.2 μg/m3 (10) 47.0
 
May 13, 2021, 1 p.m. N/A 48.9 ppb (47) N/A 5.0 ppb (5) N/A N/A 2.0 ppb (2) N/A N/A 3.6 μg/m3 (16) 47.0
 
May 13, 2021, noon N/A 47.7 ppb (45) N/A 4.0 ppb (4) N/A N/A 3.0 ppb (3) N/A N/A 3.7 μg/m3 (16) 45.0
 
May 13, 2021, 11 a.m. N/A 48.8 ppb (47) N/A 5.0 ppb (5) N/A N/A 2.0 ppb (2) N/A N/A 3.8 μg/m3 (16) 47.0
 
May 13, 2021, 10 a.m. N/A 48.3 ppb (46) N/A 5.0 ppb (5) N/A N/A 4.0 ppb (4) N/A N/A 4.2 μg/m3 (18) 46.0
 
May 13, 2021, 9 a.m. N/A 47.6 ppb (45) N/A 5.0 ppb (5) N/A N/A 6.0 ppb (6) N/A N/A 4.7 μg/m3 (20) 45.0
 
May 13, 2021, 8 a.m. N/A 45.5 ppb (43) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (8) N/A N/A 4.5 μg/m3 (19) 43.0
 
May 13, 2021, 7 a.m. N/A 43.2 ppb (41) N/A 8.0 ppb (8) N/A N/A 11.0 ppb (11) N/A N/A 4.5 μg/m3 (19) 41.0
 
May 13, 2021, 6 a.m. N/A 40.9 ppb (39) N/A 9.0 ppb (9) N/A N/A 13.0 ppb (13) N/A N/A 4.8 μg/m3 (20) 39.0
 
May 13, 2021, 5 a.m. N/A 38.9 ppb (37) N/A 11.0 ppb (11) N/A N/A 16.0 ppb (15) N/A N/A 4.0 μg/m3 (17) 37.0
 
May 13, 2021, 4 a.m. N/A 37.2 ppb (36) N/A 10.0 ppb (10) N/A N/A 23.0 ppb (22) N/A N/A 3.9 μg/m3 (17) 36.0
 
May 13, 2021, 3 a.m. N/A 36.7 ppb (35) N/A 11.0 ppb (11) N/A N/A 31.0 ppb (29) N/A N/A 3.5 μg/m3 (15) 35.0
 
May 13, 2021, 2 a.m. N/A 36.5 ppb (35) N/A 11.0 ppb (11) N/A N/A 34.0 ppb (32) N/A N/A 3.4 μg/m3 (15) 35.0
 
May 13, 2021, 1 a.m. N/A 36.9 ppb (35) N/A 11.0 ppb (11) N/A N/A 36.0 ppb (34) N/A N/A 4.8 μg/m3 (20) 35.0
 
May 13, 2021, midnight N/A 38.7 ppb (37) N/A 11.0 ppb (11) N/A N/A 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 37.0
 
May 12, 2021, 11 p.m. N/A 38.8 ppb (37) N/A 12.0 ppb (12) N/A N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 37.0
 
May 12, 2021, 10 p.m. N/A 40.1 ppb (38) N/A 11.0 ppb (11) N/A N/A 38.0 ppb (36) N/A N/A 3.7 μg/m3 (16) 38.0
 
May 12, 2021, 9 p.m. N/A 41.3 ppb (39) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 39.0
 
May 12, 2021, 8 p.m. N/A 42.4 ppb (40) N/A 11.0 ppb (11) N/A N/A 38.0 ppb (36) N/A N/A 3.3 μg/m3 (14) 40.0
 
May 12, 2021, 7 p.m. N/A 44.0 ppb (42) N/A 11.0 ppb (11) N/A N/A 39.0 ppb (37) N/A N/A 2.9 μg/m3 (13) 42.0
 
May 12, 2021, 6 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
 
May 12, 2021, 5 p.m. N/A 43.7 ppb (42) N/A 8.0 ppb (8) N/A N/A 31.0 ppb (29) N/A N/A 3.5 μg/m3 (15) 42.0
 
May 12, 2021, 4 p.m. N/A 44.5 ppb (42) N/A 10.0 ppb (10) N/A N/A 26.0 ppb (25) N/A N/A 9.5 μg/m3 (40) 42.0
 
May 12, 2021, 3 p.m. N/A 44.8 ppb (43) N/A 10.0 ppb (10) N/A N/A 21.0 ppb (20) N/A N/A 5.9 μg/m3 (25) 43.0
 
May 12, 2021, 2 p.m. N/A 44.2 ppb (42) N/A 10.0 ppb (10) N/A N/A 18.0 ppb (17) N/A N/A 7.7 μg/m3 (33) 42.0
 
May 12, 2021, 1 p.m. N/A 41.6 ppb (40) N/A 10.0 ppb (10) N/A N/A 17.0 ppb (16) N/A N/A 6.9 μg/m3 (29) 40.0
 
May 12, 2021, noon N/A 39.3 ppb (38) N/A 9.0 ppb (9) N/A N/A 18.0 ppb (17) N/A N/A 5.4 μg/m3 (23) 38.0
 
May 12, 2021, 11 a.m. N/A 36.4 ppb (35) N/A 8.0 ppb (8) N/A N/A 22.0 ppb (21) N/A N/A 5.8 μg/m3 (25) 35.0
 
May 12, 2021, 10 a.m. N/A 33.5 ppb (32) N/A 7.0 ppb (7) N/A N/A 27.0 ppb (25) N/A N/A 4.5 μg/m3 (19) 32.0
 
May 12, 2021, 9 a.m. N/A 30.7 ppb (29) N/A 7.0 ppb (7) N/A N/A 28.0 ppb (26) N/A N/A 4.1 μg/m3 (18) 29.0
 
May 12, 2021, 8 a.m. N/A 27.7 ppb (27) N/A 8.0 ppb (8) N/A N/A 27.0 ppb (25) N/A N/A 4.0 μg/m3 (17) 27.0
 
May 12, 2021, 7 a.m. N/A 25.2 ppb (24) N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
May 12, 2021, 6 a.m. N/A 24.1 ppb (23) N/A 10.0 ppb (10) N/A N/A 24.0 ppb (23) N/A N/A 4.2 μg/m3 (18) 23.0
 
May 12, 2021, 5 a.m. N/A 22.8 ppb (22) N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) N/A N/A 5.5 μg/m3 (23) 26.0
 
May 12, 2021, 4 a.m. N/A 22.6 ppb (22) N/A 11.0 ppb (11) N/A N/A 30.0 ppb (28) N/A N/A 5.2 μg/m3 (22) 28.0
 
May 12, 2021, 3 a.m. N/A 22.1 ppb (21) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
May 12, 2021, 2 a.m. N/A 22.7 ppb (22) N/A 11.0 ppb (11) N/A N/A 46.0 ppb (43) N/A N/A 3.0 μg/m3 (13) 43.0
 
May 12, 2021, 1 a.m. N/A 24.5 ppb (24) N/A 11.0 ppb (11) N/A N/A 48.0 ppb (45) N/A N/A 3.3 μg/m3 (14) 45.0
 
May 12, 2021, midnight N/A 26.1 ppb (25) N/A 12.0 ppb (12) N/A N/A 48.0 ppb (45) N/A N/A 3.8 μg/m3 (16) 45.0
 
May 11, 2021, 11 p.m. N/A 26.6 ppb (26) N/A 12.0 ppb (12) N/A N/A 48.0 ppb (45) N/A N/A 3.9 μg/m3 (17) 45.0
 
May 11, 2021, 10 p.m. N/A 29.3 ppb (28) N/A 12.0 ppb (12) N/A N/A 46.0 ppb (43) N/A N/A 3.0 μg/m3 (13) 43.0
 
May 11, 2021, 9 p.m. N/A 30.3 ppb (29) N/A 11.0 ppb (11) N/A N/A 46.0 ppb (43) N/A N/A 2.7 μg/m3 (12) 43.0
 
May 11, 2021, 8 p.m. N/A 32.8 ppb (31) N/A 11.0 ppb (11) N/A N/A 46.0 ppb (43) N/A N/A 2.7 μg/m3 (12) 43.0
 
May 11, 2021, 7 p.m. N/A 37.0 ppb (35) N/A 10.0 ppb (10) N/A N/A 44.0 ppb (41) N/A N/A 2.2 μg/m3 (10) 41.0
 
May 11, 2021, 6 p.m. N/A 41.6 ppb (40) N/A 9.0 ppb (9) N/A N/A 41.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 40.0
 
May 11, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.5 μg/m3 (7) 7.0
 
May 11, 2021, 4 p.m. N/A 44.6 ppb (43) N/A 5.0 ppb (5) N/A N/A 20.0 ppb (19) N/A N/A 1.4 μg/m3 (6) 43.0
 
May 11, 2021, 3 p.m. N/A 40.8 ppb (39) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (13) N/A N/A 1.2 μg/m3 (5) 39.0
 
May 11, 2021, 2 p.m. N/A 36.8 ppb (35) N/A 4.0 ppb (4) N/A N/A 10.0 ppb (10) N/A N/A 1.0 μg/m3 (5) 35.0
 
May 11, 2021, 1 p.m. N/A 33.9 ppb (32) N/A 6.0 ppb (6) N/A N/A 5.0 ppb (5) N/A N/A 1.5 μg/m3 (7) 32.0
 
May 11, 2021, noon N/A 28.7 ppb (28) N/A 6.0 ppb (6) N/A N/A 6.0 ppb (6) N/A N/A 1.5 μg/m3 (7) 28.0
 
May 11, 2021, 11 a.m. N/A 24.8 ppb (24) N/A 4.0 ppb (4) N/A N/A 10.0 ppb (10) N/A N/A 1.0 μg/m3 (5) 24.0
 
May 11, 2021, 10 a.m. N/A 22.8 ppb (22) N/A 5.0 ppb (5) N/A N/A 12.0 ppb (12) N/A N/A 0.9 μg/m3 (4) 22.0
 
May 11, 2021, 9 a.m. N/A 21.8 ppb (21) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (13) N/A N/A 1.2 μg/m3 (5) 21.0
 
May 11, 2021, 8 a.m. N/A 21.2 ppb (20) N/A 7.0 ppb (7) N/A N/A 15.0 ppb (14) N/A N/A 2.2 μg/m3 (10) 20.0
 
May 11, 2021, 7 a.m. N/A 20.8 ppb (20) N/A 9.0 ppb (9) N/A N/A 14.0 ppb (13) N/A N/A 7.6 μg/m3 (32) 32.0
 
May 11, 2021, 6 a.m. N/A 19.8 ppb (19) N/A 9.0 ppb (9) N/A N/A 21.0 ppb (20) N/A N/A 1.7 μg/m3 (8) 20.0
 
May 11, 2021, 5 a.m. N/A 19.4 ppb (19) N/A 11.0 ppb (11) N/A N/A 19.0 ppb (18) N/A N/A 2.0 μg/m3 (9) 19.0
 
May 11, 2021, 4 a.m. N/A 18.7 ppb (18) N/A 10.0 ppb (10) N/A N/A 28.0 ppb (26) N/A N/A 2.5 μg/m3 (11) 26.0
 
May 11, 2021, 3 a.m. N/A 19.9 ppb (19) N/A 9.0 ppb (9) N/A N/A 37.0 ppb (35) N/A N/A 2.1 μg/m3 (9) 35.0
 
May 11, 2021, 2 a.m. N/A 21.9 ppb (21) 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
 
May 11, 2021, 1 a.m. N/A 24.5 ppb (24) N/A 11.0 ppb (11) N/A N/A 45.0 ppb (42) N/A N/A 1.3 μg/m3 (6) 42.0
 
May 11, 2021, midnight N/A 27.2 ppb (26) N/A 11.0 ppb (11) N/A N/A 42.0 ppb (39) N/A N/A 1.5 μg/m3 (7) 39.0
 
May 10, 2021, 11 p.m. N/A 29.1 ppb (28) N/A 11.0 ppb (11) N/A N/A 43.0 ppb (40) N/A N/A 1.5 μg/m3 (7) 40.0
 
May 10, 2021, 10 p.m. N/A 32.3 ppb (31) N/A 12.0 ppb (12) N/A N/A 43.0 ppb (40) N/A N/A 1.1 μg/m3 (5) 40.0
 
May 10, 2021, 9 p.m. N/A 34.9 ppb (33) 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
 
May 10, 2021, 8 p.m. N/A 37.7 ppb (36) N/A 11.0 ppb (11) N/A N/A 41.0 ppb (38) N/A N/A 1.6 μg/m3 (7) 38.0
 
May 10, 2021, 7 p.m. N/A 41.0 ppb (39) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 39.0
 
May 10, 2021, 6 p.m. N/A 43.5 ppb (42) N/A 9.0 ppb (9) N/A N/A 39.0 ppb (37) N/A N/A 1.1 μg/m3 (5) 42.0
 
May 10, 2021, 5 p.m. N/A 45.3 ppb (43) N/A 8.0 ppb (8) N/A N/A 32.0 ppb (30) N/A N/A 1.0 μg/m3 (5) 43.0
 
May 10, 2021, 4 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
 
May 10, 2021, 3 p.m. N/A 47.4 ppb (45) N/A 7.0 ppb (7) N/A N/A 20.0 ppb (19) N/A N/A 6.0 μg/m3 (25) 45.0
 
May 10, 2021, 2 p.m. N/A 47.0 ppb (45) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (8) N/A N/A 8.6 μg/m3 (36) 45.0
 
May 10, 2021, 1 p.m. N/A 45.0 ppb (43) N/A 6.0 ppb (6) N/A N/A 4.0 ppb (4) N/A N/A 6.4 μg/m3 (27) 43.0
 
May 10, 2021, noon N/A 43.0 ppb (41) N/A 5.0 ppb (5) N/A N/A 6.0 ppb (6) N/A N/A 4.0 μg/m3 (17) 41.0
 
May 10, 2021, 11 a.m. N/A 41.8 ppb (40) N/A 4.0 ppb (4) N/A N/A 11.0 ppb (11) N/A N/A 1.3 μg/m3 (6) 40.0
 
May 10, 2021, 10 a.m. N/A 40.5 ppb (39) N/A 4.0 ppb (4) N/A N/A 12.0 ppb (12) N/A N/A 2.5 μg/m3 (11) 39.0
 
May 10, 2021, 9 a.m. N/A 38.6 ppb (37) N/A 5.0 ppb (5) N/A N/A 11.0 ppb (11) N/A N/A 2.9 μg/m3 (13) 37.0
 
May 10, 2021, 8 a.m. N/A 36.1 ppb (35) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (13) N/A N/A 11.7 μg/m3 (49) 49.0
 
May 10, 2021, 7 a.m. N/A 33.1 ppb (32) N/A 6.0 ppb (6) N/A N/A 13.0 ppb (13) N/A N/A 31.6 μg/m3 (93) 93.0
 
May 10, 2021, 6 a.m. N/A 29.6 ppb (28) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (16) N/A N/A 4.7 μg/m3 (20) 28.0
 
May 10, 2021, 5 a.m. N/A 27.0 ppb (26) N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) N/A N/A 34.2 μg/m3 (98) 98.0
 
May 10, 2021, 4 a.m. N/A 24.3 ppb (23) N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) N/A N/A 7.7 μg/m3 (33) 33.0
 
May 10, 2021, 3 a.m. N/A 22.7 ppb (22) N/A 9.0 ppb (9) N/A N/A 31.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
May 10, 2021, 2 a.m. N/A 23.2 ppb (22) N/A 9.0 ppb (9) N/A N/A 38.0 ppb (36) N/A N/A 3.1 μg/m3 (13) 36.0
 
May 10, 2021, 1 a.m. N/A 26.6 ppb (26) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 2.1 μg/m3 (9) 37.0
 
May 10, 2021, midnight N/A 28.0 ppb (27) N/A 10.0 ppb (10) N/A N/A 39.0 ppb (37) N/A N/A 1.8 μg/m3 (8) 37.0
 
May 9, 2021, 11 p.m. N/A 31.6 ppb (30) N/A 10.0 ppb (10) N/A N/A 38.0 ppb (36) N/A N/A 2.2 μg/m3 (10) 36.0