ID: 1168

AQSQID: 000102701

Site Name: Williams Lake Columneetza School

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

Updated: Sept. 23, 2020, 10:39 a.m.

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

Reporting: True, Located: True

Current AQI: 20.0

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
Sept. 23, 2020, 9 a.m. N/A 1.0 ppb (1) N/A -1.0 ppb (0) N/A N/A 26.0 ppb (20) N/A N/A 0.3 μg/m3 (1) 20.0
 
Sept. 23, 2020, 8 a.m. N/A 0.9 ppb (1) N/A -1.0 ppb (0) N/A N/A 25.0 ppb (19) N/A N/A 0.5 μg/m3 (2) 19.0
 
Sept. 23, 2020, 7 a.m. N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 23.0 ppb (18) N/A N/A 0.8 μg/m3 (3) 18.0
 
Sept. 23, 2020, 6 a.m. N/A 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (18) N/A N/A 1.1 μg/m3 (5) 18.0
 
Sept. 23, 2020, 5 a.m. N/A 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (18) N/A N/A 0.7 μg/m3 (3) 18.0
 
Sept. 23, 2020, 4 a.m. N/A 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) N/A N/A 1.0 μg/m3 (4) 18.0
 
Sept. 23, 2020, 3 a.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A N/A 0.8 μg/m3 (3) 20.0
 
Sept. 23, 2020, 2 a.m. N/A 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) N/A N/A 0.7 μg/m3 (3) 19.0
 
Sept. 23, 2020, 1 a.m. N/A 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 22.0 ppb (17) N/A N/A 1.2 μg/m3 (5) 17.0
 
Sept. 23, 2020, midnight N/A 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 18.0 ppb (14) N/A N/A 1.7 μg/m3 (7) 14.0
 
Sept. 22, 2020, 11 p.m. N/A 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) N/A N/A 1.1 μg/m3 (5) 17.0
 
Sept. 22, 2020, 10 p.m. N/A 1.6 ppb (1) N/A 0.0 ppb (0) N/A N/A 26.0 ppb (20) N/A N/A 0.9 μg/m3 (4) 20.0
 
Sept. 22, 2020, 9 p.m. N/A 1.8 ppb (2) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 1.9 μg/m3 (8) 17.0
 
Sept. 22, 2020, 8 p.m. N/A 2.2 ppb (2) N/A 1.0 ppb (1) N/A N/A 15.0 ppb (12) N/A N/A 2.1 μg/m3 (9) 12.0
 
Sept. 22, 2020, 7 p.m. N/A 2.7 ppb (3) N/A 0.0 ppb (0) N/A N/A 12.0 ppb (9) N/A N/A 1.9 μg/m3 (8) 9.0
 
Sept. 22, 2020, 6 p.m. N/A 3.3 ppb (3) N/A 1.0 ppb (1) N/A N/A 9.0 ppb (7) N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 22, 2020, 5 p.m. N/A 3.7 ppb (3) N/A 2.0 ppb (2) N/A N/A 4.0 ppb (3) N/A N/A 4.9 μg/m3 (20) 20.0
 
Sept. 22, 2020, 4 p.m. N/A 4.4 ppb (4) N/A 3.0 ppb (3) N/A N/A 1.0 ppb (1) N/A N/A 4.3 μg/m3 (18) 18.0
 
Sept. 22, 2020, 3 p.m. N/A 3.0 ppb (3) N/A 3.0 ppb (3) N/A N/A 2.0 ppb (2) N/A N/A 2.3 μg/m3 (10) 10.0
 
Sept. 22, 2020, 2 p.m. N/A 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 2.0 ppb (2) N/A N/A 2.6 μg/m3 (11) 11.0
 
Sept. 22, 2020, 1 p.m. N/A 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 1.0 ppb (1) N/A N/A 1.9 μg/m3 (8) 8.0
 
Sept. 22, 2020, noon N/A 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 1.0 ppb (1) N/A N/A 1.4 μg/m3 (6) 6.0
 
Sept. 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
Sept. 22, 2020, 10 a.m. N/A 1.4 ppb (1) N/A 1.0 ppb (1) N/A N/A 3.0 ppb (2) N/A N/A 2.3 μg/m3 (10) 10.0
 
Sept. 22, 2020, 9 a.m. N/A 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 3.0 ppb (2) N/A N/A 5.1 μg/m3 (21) 21.0
 
Sept. 22, 2020, 8 a.m. N/A 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 22, 2020, 7 a.m. N/A 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) N/A N/A 1.8 μg/m3 (8) 8.0
 
Sept. 22, 2020, 6 a.m. N/A 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 1.0 ppb (1) N/A N/A 1.2 μg/m3 (5) 5.0
 
Sept. 22, 2020, 5 a.m. N/A 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 0.8 μg/m3 (3) 4.0
 
Sept. 22, 2020, 4 a.m. N/A 2.4 ppb (2) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 0.7 μg/m3 (3) 4.0
 
Sept. 22, 2020, 3 a.m. N/A 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 4.0 ppb (3) N/A N/A 1.6 μg/m3 (7) 7.0
 
Sept. 22, 2020, 2 a.m. N/A 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 12.0 ppb (9) N/A N/A 1.4 μg/m3 (6) 9.0
 
Sept. 22, 2020, 1 a.m. N/A 0.7 ppb (1) N/A -1.0 ppb (0) N/A N/A 19.0 ppb (15) N/A N/A 0.2 μg/m3 (1) 15.0
 
Sept. 22, 2020, midnight N/A 0.9 ppb (1) N/A -1.0 ppb (0) N/A N/A 20.0 ppb (15) N/A N/A 0.3 μg/m3 (1) 15.0
 
Sept. 21, 2020, 11 p.m. N/A 1.6 ppb (1) N/A -1.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 0.3 μg/m3 (1) 16.0
 
Sept. 21, 2020, 10 p.m. N/A 1.6 ppb (1) N/A -1.0 ppb (0) N/A N/A 20.0 ppb (15) N/A N/A 0.3 μg/m3 (1) 15.0
 
Sept. 21, 2020, 9 p.m. N/A 1.3 ppb (1) N/A -1.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 0.3 μg/m3 (1) 16.0
 
Sept. 21, 2020, 8 p.m. N/A 1.2 ppb (1) N/A 0.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 0.3 μg/m3 (1) 16.0
 
Sept. 21, 2020, 7 p.m. N/A 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 14.0 ppb (11) N/A N/A 0.5 μg/m3 (2) 11.0
 
Sept. 21, 2020, 6 p.m. N/A 1.4 ppb (1) N/A 1.0 ppb (1) N/A N/A 13.0 ppb (10) N/A N/A 0.5 μg/m3 (2) 10.0
 
Sept. 21, 2020, 5 p.m. N/A 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 12.0 ppb (9) N/A N/A 1.0 μg/m3 (4) 9.0
 
Sept. 21, 2020, 4 p.m. N/A 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 9.0 ppb (7) N/A N/A 1.3 μg/m3 (5) 7.0
 
Sept. 21, 2020, 3 p.m. N/A 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 21, 2020, 2 p.m. N/A 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A 7.0 ppb (5) N/A N/A 1.7 μg/m3 (7) 7.0
 
Sept. 21, 2020, 1 p.m. N/A 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 12.0 ppb (9) N/A N/A 0.9 μg/m3 (4) 9.0
 
Sept. 21, 2020, noon N/A 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A 14.0 ppb (11) N/A N/A 0.8 μg/m3 (3) 11.0
 
Sept. 21, 2020, 11 a.m. N/A 0.9 ppb (1) N/A -1.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 0.7 μg/m3 (3) 16.0
 
Sept. 21, 2020, 10 a.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
 
Sept. 21, 2020, 9 a.m. N/A 1.0 ppb (1) N/A -1.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 0.7 μg/m3 (3) 16.0
 
Sept. 21, 2020, 8 a.m. N/A 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A N/A 1.9 μg/m3 (8) 16.0
 
Sept. 21, 2020, 7 a.m. N/A 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 12.0 ppb (9) N/A N/A 1.6 μg/m3 (7) 9.0
 
Sept. 21, 2020, 6 a.m. N/A 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 7.0 ppb (5) N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 21, 2020, 5 a.m. N/A 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 9.0 ppb (7) N/A N/A 1.5 μg/m3 (6) 7.0
 
Sept. 21, 2020, 4 a.m. N/A 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 8.0 ppb (6) N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 21, 2020, 3 a.m. N/A 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 6.0 ppb (5) N/A N/A 2.6 μg/m3 (11) 11.0
 
Sept. 21, 2020, 2 a.m. N/A 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 11.0 ppb (8) N/A N/A 2.2 μg/m3 (9) 9.0
 
Sept. 21, 2020, 1 a.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) N/A N/A 2.0 μg/m3 (8) 13.0
 
Sept. 21, 2020, midnight N/A 1.2 ppb (1) N/A -1.0 ppb (0) N/A N/A 23.0 ppb (18) N/A N/A 1.6 μg/m3 (7) 18.0
 
Sept. 20, 2020, 11 p.m. N/A 1.6 ppb (1) N/A -1.0 ppb (0) N/A N/A 24.0 ppb (18) N/A N/A 1.9 μg/m3 (8) 18.0
 
Sept. 20, 2020, 10 p.m. N/A 1.6 ppb (1) N/A -1.0 ppb (0) N/A N/A 23.0 ppb (18) N/A N/A 2.3 μg/m3 (10) 18.0
 
Sept. 20, 2020, 9 p.m. N/A 1.6 ppb (1) N/A -1.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 2.6 μg/m3 (11) 16.0
 
Sept. 20, 2020, 8 p.m. N/A 1.6 ppb (1) N/A -1.0 ppb (0) N/A N/A 17.0 ppb (13) N/A N/A 3.7 μg/m3 (15) 15.0
 
Sept. 20, 2020, 7 p.m. N/A 2.1 ppb (2) N/A 0.0 ppb (0) N/A N/A 10.0 ppb (8) N/A N/A 6.2 μg/m3 (26) 26.0
 
Sept. 20, 2020, 6 p.m. N/A 2.6 ppb (2) N/A 0.0 ppb (0) N/A N/A 7.0 ppb (5) N/A N/A 7.7 μg/m3 (32) 32.0
 
Sept. 20, 2020, 5 p.m. N/A 2.8 ppb (3) N/A 0.0 ppb (0) N/A N/A 3.0 ppb (2) N/A N/A 9.3 μg/m3 (39) 39.0
 
Sept. 20, 2020, 4 p.m. N/A 2.7 ppb (3) N/A 0.0 ppb (0) N/A N/A 1.0 ppb (1) N/A N/A 10.6 μg/m3 (44) 44.0
 
Sept. 20, 2020, 3 p.m. N/A 2.8 ppb (3) N/A 0.0 ppb (0) N/A N/A 0.0 ppb (0) N/A N/A 10.3 μg/m3 (43) 43.0
 
Sept. 20, 2020, 2 p.m. N/A 2.3 ppb (2) N/A 0.0 ppb (0) N/A N/A 0.0 ppb (0) N/A N/A 10.4 μg/m3 (43) 43.0
 
Sept. 20, 2020, 1 p.m. N/A 1.9 ppb (2) N/A 0.0 ppb (0) N/A N/A 0.0 ppb (0) N/A N/A 10.7 μg/m3 (45) 45.0
 
Sept. 20, 2020, noon N/A 1.8 ppb (2) N/A 0.0 ppb (0) N/A N/A 0.0 ppb (0) N/A N/A 11.5 μg/m3 (48) 48.0
 
Sept. 20, 2020, 11 a.m. N/A 1.8 ppb (2) N/A 0.0 ppb (0) N/A N/A 0.0 ppb (0) N/A N/A 12.1 μg/m3 (50) 50.0
 
Sept. 20, 2020, 10 a.m. N/A 1.7 ppb (2) N/A 0.0 ppb (0) N/A N/A 0.0 ppb (0) N/A N/A 13.6 μg/m3 (53) 53.0
 
Sept. 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.7 μg/m3 (56) 56.0
 
Sept. 20, 2020, 8 a.m. N/A 2.9 ppb (3) N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) N/A N/A 14.1 μg/m3 (54) 54.0
 
Sept. 20, 2020, 7 a.m. N/A 3.2 ppb (3) N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) N/A N/A 14.6 μg/m3 (56) 56.0
 
Sept. 20, 2020, 6 a.m. N/A 2.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) N/A N/A 16.1 μg/m3 (59) 59.0
 
Sept. 20, 2020, 5 a.m. N/A 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) N/A N/A 15.1 μg/m3 (57) 57.0
 
Sept. 20, 2020, 4 a.m. N/A 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) N/A N/A 16.6 μg/m3 (60) 60.0
 
Sept. 20, 2020, 3 a.m. N/A 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 6.0 ppb (5) N/A N/A 16.3 μg/m3 (59) 59.0
 
Sept. 20, 2020, 2 a.m. N/A 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 4.0 ppb (3) N/A N/A 18.6 μg/m3 (64) 64.0
 
Sept. 20, 2020, 1 a.m. N/A 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 9.0 ppb (7) N/A N/A 17.7 μg/m3 (62) 62.0
 
Sept. 20, 2020, midnight N/A 1.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 19.0 ppb (15) N/A N/A 16.2 μg/m3 (59) 59.0
 
Sept. 19, 2020, 11 p.m. N/A 1.2 ppb (1) N/A 0.0 ppb (0) N/A N/A 20.0 ppb (15) N/A N/A 15.6 μg/m3 (58) 58.0
 
Sept. 19, 2020, 10 p.m. N/A 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A 16.0 ppb (12) N/A N/A 15.1 μg/m3 (57) 57.0
 
Sept. 19, 2020, 9 p.m. N/A 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 11.0 ppb (8) N/A N/A 17.1 μg/m3 (61) 61.0
 
Sept. 19, 2020, 8 p.m. N/A 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 9.0 ppb (7) N/A N/A 23.5 μg/m3 (74) 74.0
 
Sept. 19, 2020, 7 p.m. N/A 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A 8.0 ppb (6) N/A N/A 23.7 μg/m3 (75) 75.0
 
Sept. 19, 2020, 6 p.m. N/A 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 8.0 ppb (6) N/A N/A 24.5 μg/m3 (77) 77.0
 
Sept. 19, 2020, 5 p.m. N/A 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 24.4 μg/m3 (76) 76.0
 
Sept. 19, 2020, 4 p.m. N/A 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 10.0 ppb (8) N/A N/A 25.1 μg/m3 (78) 78.0
 
Sept. 19, 2020, 3 p.m. N/A 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 11.0 ppb (8) N/A N/A 24.4 μg/m3 (76) 76.0
 
Sept. 19, 2020, 2 p.m. N/A 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 12.0 ppb (9) N/A N/A 22.4 μg/m3 (72) 72.0
 
Sept. 19, 2020, 1 p.m. N/A 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) N/A N/A 25.0 μg/m3 (78) 78.0
 
Sept. 19, 2020, noon N/A 0.7 ppb (1) N/A 0.0 ppb (0) N/A N/A 27.0 ppb (21) N/A N/A 22.5 μg/m3 (72) 72.0
 
Sept. 19, 2020, 11 a.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) N/A N/A 26.5 μg/m3 (81) 81.0
 
Sept. 19, 2020, 10 a.m. N/A 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 12.0 ppb (9) N/A N/A 25.1 μg/m3 (78) 78.0
 
Sept. 19, 2020, 9 a.m. N/A 2.4 ppb (2) N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) N/A N/A 20.3 μg/m3 (68) 68.0
 
Sept. 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 21.4 μg/m3 (70) 70.0
 
Sept. 19, 2020, 7 a.m. N/A 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) N/A N/A 18.7 μg/m3 (64) 64.0
 
Sept. 19, 2020, 6 a.m. N/A 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) N/A N/A 19.5 μg/m3 (66) 66.0
 
Sept. 19, 2020, 5 a.m. N/A 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 1.0 ppb (1) N/A N/A 20.2 μg/m3 (67) 67.0
 
Sept. 19, 2020, 4 a.m. N/A 2.6 ppb (2) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) N/A N/A 22.0 μg/m3 (71) 71.0
 
Sept. 19, 2020, 3 a.m. N/A 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) N/A N/A 24.6 μg/m3 (77) 77.0
 
Sept. 19, 2020, 2 a.m. N/A 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) N/A N/A 23.6 μg/m3 (75) 75.0
 
Sept. 19, 2020, 1 a.m. N/A 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 5.0 ppb (4) N/A N/A 20.5 μg/m3 (68) 68.0
 
Sept. 19, 2020, midnight N/A 3.6 ppb (3) N/A 11.0 ppb (10) N/A N/A 7.0 ppb (5) N/A N/A 29.6 μg/m3 (87) 87.0
 
Sept. 18, 2020, 11 p.m. N/A 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A 10.0 ppb (8) N/A N/A 28.9 μg/m3 (86) 86.0
 
Sept. 18, 2020, 10 p.m. N/A 2.9 ppb (3) N/A 3.0 ppb (3) N/A N/A 8.0 ppb (6) N/A N/A 23.6 μg/m3 (75) 75.0
 
Sept. 18, 2020, 9 p.m. N/A 2.6 ppb (2) N/A 1.0 ppb (1) N/A N/A 8.0 ppb (6) N/A N/A 22.5 μg/m3 (72) 72.0
 
Sept. 18, 2020, 8 p.m. N/A 4.9 ppb (5) N/A 3.0 ppb (3) N/A N/A 4.0 ppb (3) N/A N/A 22.8 μg/m3 (73) 73.0
 
Sept. 18, 2020, 7 p.m. N/A 5.3 ppb (5) N/A 3.0 ppb (3) N/A N/A 1.0 ppb (1) N/A N/A 22.4 μg/m3 (72) 72.0
 
Sept. 18, 2020, 6 p.m. N/A 10.6 ppb (10) N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) N/A N/A 26.5 μg/m3 (81) 81.0
 
Sept. 18, 2020, 5 p.m. N/A 9.3 ppb (9) N/A 3.0 ppb (3) N/A N/A -1.0 ppb (0) N/A N/A 27.3 μg/m3 (83) 83.0
 
Sept. 18, 2020, 4 p.m. N/A 8.4 ppb (8) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 24.5 μg/m3 (77) 77.0
 
Sept. 18, 2020, 3 p.m. N/A 9.2 ppb (9) N/A 1.0 ppb (1) N/A N/A -1.0 ppb (0) N/A N/A 17.5 μg/m3 (62) 62.0
 
Sept. 18, 2020, 2 p.m. N/A 6.5 ppb (6) N/A 1.0 ppb (1) N/A N/A -1.0 ppb (0) N/A N/A 23.8 μg/m3 (75) 75.0
 
Sept. 18, 2020, 1 p.m. N/A 7.1 ppb (7) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 27.6 μg/m3 (83) 83.0
 
Sept. 18, 2020, noon N/A 3.8 ppb (4) N/A 1.0 ppb (1) N/A N/A -1.0 ppb (0) N/A N/A 27.7 μg/m3 (83) 83.0
 
Sept. 18, 2020, 11 a.m. N/A 4.3 ppb (4) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 25.3 μg/m3 (78) 78.0
 
Sept. 18, 2020, 10 a.m. N/A 7.6 ppb (7) N/A 4.0 ppb (4) N/A N/A -1.0 ppb (0) N/A N/A 24.4 μg/m3 (76) 76.0
 
Sept. 18, 2020, 9 a.m. N/A 12.6 ppb (12) N/A 6.0 ppb (6) N/A N/A -1.0 ppb (0) N/A N/A 25.7 μg/m3 (79) 79.0
 
Sept. 18, 2020, 8 a.m. N/A 8.8 ppb (8) N/A 7.0 ppb (6) N/A N/A -1.0 ppb (0) N/A N/A 26.5 μg/m3 (81) 81.0
 
Sept. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 28.4 μg/m3 (85) 85.0
 
Sept. 18, 2020, 6 a.m. N/A 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 0.0 ppb (0) N/A N/A 27.6 μg/m3 (83) 83.0
 
Sept. 18, 2020, 5 a.m. N/A 3.3 ppb (3) N/A 7.0 ppb (6) N/A N/A 2.0 ppb (2) N/A N/A 27.3 μg/m3 (83) 83.0
 
Sept. 18, 2020, 4 a.m. N/A 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 5.0 ppb (4) N/A N/A 29.1 μg/m3 (86) 86.0
 
Sept. 18, 2020, 3 a.m. N/A 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 7.0 ppb (5) N/A N/A 29.9 μg/m3 (88) 88.0
 
Sept. 18, 2020, 2 a.m. N/A 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 30.4 μg/m3 (89) 89.0
 
Sept. 18, 2020, 1 a.m. N/A 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 10.0 ppb (8) N/A N/A 29.0 μg/m3 (86) 86.0
 
Sept. 18, 2020, midnight N/A 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A 14.0 ppb (11) N/A N/A 29.5 μg/m3 (87) 87.0
 
Sept. 17, 2020, 11 p.m. N/A 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 18.0 ppb (14) N/A N/A 32.5 μg/m3 (94) 94.0
 
Sept. 17, 2020, 10 p.m. N/A 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 18.0 ppb (14) N/A N/A 34.3 μg/m3 (97) 97.0
 
Sept. 17, 2020, 9 p.m. N/A 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 32.9 μg/m3 (94) 94.0
 
Sept. 17, 2020, 8 p.m. N/A 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 12.0 ppb (9) N/A N/A 29.5 μg/m3 (87) 87.0
 
Sept. 17, 2020, 7 p.m. N/A 4.0 ppb (4) N/A 3.0 ppb (3) N/A N/A 6.0 ppb (5) N/A N/A 27.0 μg/m3 (82) 82.0
 
Sept. 17, 2020, 6 p.m. N/A 6.9 ppb (6) N/A 4.0 ppb (4) N/A N/A 2.0 ppb (2) N/A N/A 27.2 μg/m3 (82) 82.0
 
Sept. 17, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 25.0 μg/m3 (78) 78.0
 
Sept. 17, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 28.0 μg/m3 (84) 84.0
 
Sept. 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 28.1 μg/m3 (84) 84.0
 
Sept. 17, 2020, 2 p.m. N/A 6.6 ppb (6) N/A 1.0 ppb (1) N/A N/A -1.0 ppb (0) N/A N/A 24.4 μg/m3 (76) 76.0
 
Sept. 17, 2020, 1 p.m. N/A 7.3 ppb (7) N/A 3.0 ppb (3) N/A N/A -1.0 ppb (0) N/A N/A 26.7 μg/m3 (81) 81.0
 
Sept. 17, 2020, noon N/A 4.5 ppb (4) N/A 3.0 ppb (3) N/A N/A -1.0 ppb (0) N/A N/A 28.0 μg/m3 (84) 84.0
 
Sept. 17, 2020, 11 a.m. N/A 5.9 ppb (5) N/A 4.0 ppb (4) N/A N/A -1.0 ppb (0) N/A N/A 27.7 μg/m3 (83) 83.0
 
Sept. 17, 2020, 10 a.m. N/A 4.9 ppb (5) N/A 4.0 ppb (4) N/A N/A -1.0 ppb (0) N/A N/A 27.1 μg/m3 (82) 82.0
 
Sept. 17, 2020, 9 a.m. N/A 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A -1.0 ppb (0) N/A N/A 27.5 μg/m3 (83) 83.0
 
Sept. 17, 2020, 8 a.m. N/A 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) N/A N/A 28.2 μg/m3 (84) 84.0
 
Sept. 17, 2020, 7 a.m. N/A 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 0.0 ppb (0) N/A N/A 28.9 μg/m3 (86) 86.0
 
Sept. 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 31.4 μg/m3 (91) 91.0
 
Sept. 17, 2020, 5 a.m. N/A 5.6 ppb (5) N/A 12.0 ppb (11) N/A N/A 0.0 ppb (0) N/A N/A 31.6 μg/m3 (92) 92.0
 
Sept. 17, 2020, 4 a.m. N/A 2.6 ppb (2) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) N/A N/A 30.6 μg/m3 (90) 90.0
 
Sept. 17, 2020, 3 a.m. N/A 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A 3.0 ppb (2) N/A N/A 29.5 μg/m3 (87) 87.0
 
Sept. 17, 2020, 2 a.m. N/A 2.8 ppb (3) N/A 12.0 ppb (11) N/A N/A 3.0 ppb (2) N/A N/A 29.4 μg/m3 (87) 87.0
 
Sept. 17, 2020, 1 a.m. N/A 1.8 ppb (2) N/A 8.0 ppb (7) N/A N/A 14.0 ppb (11) N/A N/A 30.6 μg/m3 (90) 90.0
 
Sept. 17, 2020, midnight N/A 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A N/A 29.9 μg/m3 (88) 88.0
 
Sept. 16, 2020, 11 p.m. N/A 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) N/A N/A 26.8 μg/m3 (81) 81.0
 
Sept. 16, 2020, 10 p.m. N/A 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A N/A 24.9 μg/m3 (77) 77.0
 
Sept. 16, 2020, 9 p.m. N/A 2.3 ppb (2) N/A 1.0 ppb (1) N/A N/A 18.0 ppb (14) N/A N/A 23.7 μg/m3 (75) 75.0
 
Sept. 16, 2020, 8 p.m. N/A 2.8 ppb (3) N/A 1.0 ppb (1) N/A N/A 12.0 ppb (9) N/A N/A 19.3 μg/m3 (66) 66.0
 
Sept. 16, 2020, 7 p.m. N/A 4.3 ppb (4) N/A 0.0 ppb (0) N/A N/A 6.0 ppb (5) N/A N/A 15.2 μg/m3 (57) 57.0
 
Sept. 16, 2020, 6 p.m. N/A 5.8 ppb (5) N/A 1.0 ppb (1) N/A N/A 2.0 ppb (2) N/A N/A 13.5 μg/m3 (53) 53.0
 
Sept. 16, 2020, 5 p.m. N/A 7.2 ppb (7) N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) N/A N/A 16.6 μg/m3 (60) 60.0
 
Sept. 16, 2020, 4 p.m. N/A 9.2 ppb (9) N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) N/A N/A 18.6 μg/m3 (64) 64.0
 
Sept. 16, 2020, 3 p.m. N/A 14.1 ppb (13) N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) N/A N/A 22.0 μg/m3 (71) 71.0
 
Sept. 16, 2020, 2 p.m. N/A 9.5 ppb (9) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 19.8 μg/m3 (67) 67.0
 
Sept. 16, 2020, 1 p.m. N/A 5.5 ppb (5) N/A 1.0 ppb (1) N/A N/A -1.0 ppb (0) N/A N/A 17.1 μg/m3 (61) 61.0
 
Sept. 16, 2020, noon N/A 6.1 ppb (6) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 17.9 μg/m3 (63) 63.0
 
Sept. 16, 2020, 11 a.m. N/A 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 19.2 μg/m3 (65) 65.0
 
Sept. 16, 2020, 10 a.m. N/A 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A -1.0 ppb (0) N/A N/A 19.4 μg/m3 (66) 66.0