AQSQID: 000102701

Site Name: Williams Lake Columneetza School

Location: Williams Lake, CC

Reporting: True, Located: True

Current AQI: 33.0

Williams Lake CC, CA: 52.1342, -122.1528

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 24, 2019, midnight N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 7.7 μg/m3 (32) 33.0
 
July 23, 2019, 11 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 7.2 μg/m3 (30) 35.0
 
July 23, 2019, 10 p.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 6.7 μg/m3 (28) 35.0
 
July 23, 2019, 9 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 6.5 μg/m3 (27) 35.0
 
July 23, 2019, 8 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 6.5 μg/m3 (27) 36.0
 
July 23, 2019, 7 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 6.6 μg/m3 (28) 35.0
 
July 23, 2019, 6 p.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A N/A 10.2 μg/m3 (42) 42.0
 
July 23, 2019, 5 p.m. N/A 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 14.8 μg/m3 (56) 56.0
 
July 23, 2019, 4 p.m. N/A 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) N/A N/A 10.8 μg/m3 (45) 45.0
 
July 23, 2019, 3 p.m. N/A 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (10) N/A N/A 9.3 μg/m3 (39) 39.0
 
July 23, 2019, 2 p.m. N/A 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A 7.0 ppb (5) N/A N/A 9.9 μg/m3 (41) 41.0
 
July 23, 2019, 1 p.m. N/A 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 5.0 ppb (4) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 23, 2019, noon N/A 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 4.0 ppb (3) N/A N/A 8.7 μg/m3 (36) 36.0
 
July 23, 2019, 11 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 8.0 ppb (6) N/A N/A 9.3 μg/m3 (39) 39.0
 
July 23, 2019, 10 a.m. N/A -0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 9.5 μg/m3 (40) 40.0
 
July 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.2 μg/m3 (38) 38.0
 
July 23, 2019, 8 a.m. N/A -0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 8.0 μg/m3 (33) 33.0
 
July 23, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 12.0 ppb (9) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 23, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 6.1 μg/m3 (25) 25.0
 
July 23, 2019, 5 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A N/A 5.5 μg/m3 (23) 23.0
 
July 23, 2019, 4 a.m. N/A -0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) N/A N/A 6.9 μg/m3 (29) 29.0
 
July 23, 2019, 3 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) N/A N/A 8.1 μg/m3 (34) 34.0
 
July 23, 2019, 2 a.m. N/A -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 23, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A N/A 5.3 μg/m3 (22) 25.0
 
July 23, 2019, midnight N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A N/A 4.6 μg/m3 (19) 25.0
 
July 22, 2019, 11 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) N/A N/A 3.7 μg/m3 (15) 26.0
 
July 22, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) N/A N/A 3.8 μg/m3 (16) 25.0
 
July 22, 2019, 9 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) N/A N/A 3.7 μg/m3 (15) 23.0
 
July 22, 2019, 8 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) N/A N/A 3.7 μg/m3 (15) 21.0
 
July 22, 2019, 7 p.m. N/A 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) N/A N/A 4.9 μg/m3 (20) 21.0
 
July 22, 2019, 6 p.m. N/A 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2019, 5 p.m. N/A 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) N/A N/A 7.6 μg/m3 (32) 32.0
 
July 22, 2019, 4 p.m. N/A 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) N/A N/A 11.6 μg/m3 (48) 48.0
 
July 22, 2019, 3 p.m. N/A 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 10.7 μg/m3 (45) 45.0
 
July 22, 2019, 2 p.m. N/A 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 12.0 ppb (9) N/A N/A 9.4 μg/m3 (39) 39.0
 
July 22, 2019, 1 p.m. N/A 4.2 ppb (4) N/A 7.0 ppb (6) N/A N/A 3.0 ppb (2) N/A N/A 9.3 μg/m3 (39) 39.0
 
July 22, 2019, noon N/A 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 4.0 ppb (3) N/A N/A 6.7 μg/m3 (28) 28.0
 
July 22, 2019, 11 a.m. N/A -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 7.0 ppb (5) N/A N/A 5.7 μg/m3 (24) 24.0
 
July 22, 2019, 10 a.m. N/A -0.6 ppb (0) N/A 3.0 ppb (3) N/A N/A 10.0 ppb (8) N/A N/A 5.7 μg/m3 (24) 24.0
 
July 22, 2019, 9 a.m. N/A -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 11.0 ppb (8) N/A N/A 6.5 μg/m3 (27) 27.0
 
July 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 22, 2019, 7 a.m. N/A -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 13.0 ppb (10) N/A N/A 6.9 μg/m3 (29) 29.0
 
July 22, 2019, 6 a.m. N/A -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 8.4 μg/m3 (35) 35.0
 
July 22, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 12.0 ppb (9) N/A N/A 8.4 μg/m3 (35) 35.0
 
July 22, 2019, 4 a.m. N/A -0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 16.0 ppb (12) N/A N/A 8.0 μg/m3 (33) 33.0
 
July 22, 2019, 3 a.m. N/A -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A N/A 6.4 μg/m3 (27) 27.0
 
July 22, 2019, 2 a.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2019, 1 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) N/A N/A 6.8 μg/m3 (28) 28.0
 
July 22, 2019, midnight N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
July 21, 2019, 11 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) N/A N/A 4.0 μg/m3 (17) 24.0
 
July 21, 2019, 10 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) N/A N/A 3.5 μg/m3 (15) 24.0
 
July 21, 2019, 9 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) N/A N/A 2.9 μg/m3 (12) 23.0
 
July 21, 2019, 8 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 2.2 μg/m3 (9) 22.0
 
July 21, 2019, 7 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 1.4 μg/m3 (6) 18.0
 
July 21, 2019, 6 p.m. N/A -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 20.0 ppb (15) N/A N/A 1.2 μg/m3 (5) 15.0
 
July 21, 2019, 5 p.m. N/A 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 18.0 ppb (14) N/A N/A 1.1 μg/m3 (5) 14.0
 
July 21, 2019, 4 p.m. N/A 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 18.0 ppb (14) N/A N/A 1.1 μg/m3 (5) 14.0
 
July 21, 2019, 3 p.m. N/A 0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A 17.0 ppb (13) N/A N/A 1.0 μg/m3 (4) 13.0
 
July 21, 2019, 2 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 12.0 ppb (9) N/A N/A 1.4 μg/m3 (6) 9.0
 
July 21, 2019, 1 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 8.0 ppb (6) N/A N/A 1.5 μg/m3 (6) 6.0
 
July 21, 2019, noon N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 8.0 ppb (6) N/A N/A 1.5 μg/m3 (6) 6.0
 
July 21, 2019, 11 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 8.0 ppb (6) N/A N/A 1.6 μg/m3 (7) 7.0
 
July 21, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 8.0 ppb (6) N/A N/A 1.7 μg/m3 (7) 7.0
 
July 21, 2019, 9 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 9.0 ppb (7) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 21, 2019, 8 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 8.0 ppb (6) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
July 21, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 8.0 ppb (6) N/A N/A 3.3 μg/m3 (14) 14.0
 
July 21, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 10.0 ppb (8) N/A N/A 2.9 μg/m3 (12) 12.0
 
July 21, 2019, 4 a.m. N/A -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 14.0 ppb (11) N/A N/A 1.6 μg/m3 (7) 11.0
 
July 21, 2019, 3 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (15) N/A N/A 1.0 μg/m3 (4) 15.0
 
July 21, 2019, 2 a.m. N/A -0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A 22.0 ppb (17) N/A N/A 1.1 μg/m3 (5) 17.0
 
July 21, 2019, 1 a.m. N/A -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 22.0 ppb (17) N/A N/A 1.0 μg/m3 (4) 17.0
 
July 21, 2019, midnight N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 1.0 μg/m3 (4) 17.0
 
July 20, 2019, 11 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 1.1 μg/m3 (5) 16.0
 
July 20, 2019, 10 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 22.0 ppb (17) N/A N/A 1.1 μg/m3 (5) 17.0
 
July 20, 2019, 9 p.m. N/A -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 1.1 μg/m3 (5) 16.0
 
July 20, 2019, 8 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (16) N/A N/A 1.2 μg/m3 (5) 16.0
 
July 20, 2019, 7 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (15) N/A N/A 1.2 μg/m3 (5) 15.0
 
July 20, 2019, 6 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 19.0 ppb (15) N/A N/A 1.3 μg/m3 (5) 15.0
 
July 20, 2019, 5 p.m. N/A 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 15.0 ppb (12) N/A N/A 1.7 μg/m3 (7) 12.0
 
July 20, 2019, 4 p.m. N/A 2.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 12.0 ppb (9) N/A N/A 5.4 μg/m3 (23) 23.0
 
July 20, 2019, 3 p.m. N/A 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 6.0 ppb (5) N/A N/A 5.5 μg/m3 (23) 23.0
 
July 20, 2019, 2 p.m. N/A 1.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 3.0 ppb (2) N/A N/A 3.9 μg/m3 (16) 16.0
 
July 20, 2019, 1 p.m. N/A 2.8 ppb (3) N/A 2.0 ppb (2) N/A N/A 2.0 ppb (2) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 20, 2019, noon N/A 1.8 ppb (2) 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
 
July 20, 2019, 11 a.m. N/A 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) N/A N/A 5.2 μg/m3 (22) 22.0
 
July 20, 2019, 10 a.m. N/A 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 3.0 ppb (2) N/A N/A 7.1 μg/m3 (30) 30.0
 
July 20, 2019, 9 a.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 4.0 ppb (3) N/A N/A 4.4 μg/m3 (18) 18.0
 
July 20, 2019, 8 a.m. N/A 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 4.0 ppb (3) N/A N/A 3.7 μg/m3 (15) 15.0
 
July 20, 2019, 7 a.m. N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 6.0 ppb (5) N/A N/A 4.3 μg/m3 (18) 18.0
 
July 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.2 μg/m3 (18) 18.0
 
July 20, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 5.4 μg/m3 (23) 23.0
 
July 20, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) N/A N/A 3.3 μg/m3 (14) 14.0
 
July 20, 2019, 3 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 18.0 ppb (14) N/A N/A 2.1 μg/m3 (9) 14.0
 
July 20, 2019, 2 a.m. N/A -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 20.0 ppb (15) N/A N/A 1.8 μg/m3 (8) 15.0
 
July 20, 2019, 1 a.m. N/A -0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 1.8 μg/m3 (8) 16.0
 
July 20, 2019, midnight N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (16) N/A N/A 2.0 μg/m3 (8) 16.0
 
July 19, 2019, 11 p.m. N/A -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 22.0 ppb (17) N/A N/A 2.0 μg/m3 (8) 17.0
 
July 19, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 21.0 ppb (16) N/A N/A 1.8 μg/m3 (8) 16.0
 
July 19, 2019, 9 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (16) N/A N/A 1.9 μg/m3 (8) 16.0
 
July 19, 2019, 8 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 20.0 ppb (15) N/A N/A 1.5 μg/m3 (6) 15.0
 
July 19, 2019, 7 p.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (15) N/A N/A 1.9 μg/m3 (8) 15.0
 
July 19, 2019, 6 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (15) N/A N/A 2.1 μg/m3 (9) 15.0
 
July 19, 2019, 5 p.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 4.4 μg/m3 (18) 18.0
 
July 19, 2019, 4 p.m. N/A 7.0 ppb (6) N/A 6.0 ppb (6) N/A N/A 12.0 ppb (9) N/A N/A 10.3 μg/m3 (43) 43.0
 
July 19, 2019, 3 p.m. N/A 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A 9.0 ppb (7) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 19, 2019, 2 p.m. N/A 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 5.0 ppb (4) N/A N/A 5.2 μg/m3 (22) 22.0
 
July 19, 2019, 1 p.m. N/A 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A 3.0 ppb (2) N/A N/A 5.7 μg/m3 (24) 24.0
 
July 19, 2019, noon N/A 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 3.0 ppb (2) N/A N/A 5.1 μg/m3 (21) 21.0
 
July 19, 2019, 11 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 5.0 ppb (4) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2019, 10 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 7.0 ppb (5) N/A N/A 6.1 μg/m3 (25) 25.0
 
July 19, 2019, 9 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 6.0 ppb (5) N/A N/A 5.4 μg/m3 (23) 23.0
 
July 19, 2019, 8 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 7.0 ppb (5) N/A N/A 6.1 μg/m3 (25) 25.0
 
July 19, 2019, 7 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 7.0 ppb (5) N/A N/A 3.6 μg/m3 (15) 15.0
 
July 19, 2019, 6 a.m. N/A -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 6.0 ppb (5) N/A N/A 3.0 μg/m3 (12) 12.0
 
July 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.5 μg/m3 (6) 6.0
 
July 19, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 1.3 μg/m3 (5) 6.0
 
July 19, 2019, 3 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (12) N/A N/A 0.9 μg/m3 (4) 12.0
 
July 19, 2019, 2 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) N/A N/A 1.6 μg/m3 (7) 13.0
 
July 19, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 0.8 μg/m3 (3) 17.0
 
July 19, 2019, midnight N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A N/A 1.3 μg/m3 (5) 16.0
 
July 18, 2019, 11 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 0.8 μg/m3 (3) 18.0
 
July 18, 2019, 10 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 23.0 ppb (18) N/A N/A 0.4 μg/m3 (2) 18.0
 
July 18, 2019, 9 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (18) N/A N/A 0.4 μg/m3 (2) 18.0
 
July 18, 2019, 8 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (18) N/A N/A 4.7 μg/m3 (20) 20.0
 
July 18, 2019, 7 p.m. N/A 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (18) N/A N/A 0.6 μg/m3 (2) 18.0
 
July 18, 2019, 6 p.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 1.0 μg/m3 (4) 18.0
 
July 18, 2019, 5 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 0.6 μg/m3 (2) 18.0
 
July 18, 2019, 4 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 0.7 μg/m3 (3) 17.0
 
July 18, 2019, 3 p.m. N/A 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 13.0 ppb (10) N/A N/A 1.0 μg/m3 (4) 10.0
 
July 18, 2019, 2 p.m. N/A 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 8.0 ppb (6) N/A N/A 1.1 μg/m3 (5) 6.0
 
July 18, 2019, 1 p.m. N/A 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 7.0 ppb (5) N/A N/A 1.0 μg/m3 (4) 5.0
 
July 18, 2019, noon N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 6.0 ppb (5) N/A N/A 0.9 μg/m3 (4) 5.0
 
July 18, 2019, 11 a.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 6.0 ppb (5) N/A N/A 0.9 μg/m3 (4) 5.0
 
July 18, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 8.0 ppb (6) N/A N/A 0.6 μg/m3 (2) 6.0
 
July 18, 2019, 9 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 13.0 ppb (10) N/A N/A 0.8 μg/m3 (3) 10.0
 
July 18, 2019, 8 a.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 17.0 ppb (13) N/A N/A 1.0 μg/m3 (4) 13.0
 
July 18, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (12) N/A N/A 1.3 μg/m3 (5) 12.0
 
July 18, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (15) N/A N/A 0.7 μg/m3 (3) 15.0
 
July 18, 2019, 5 a.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 0.7 μg/m3 (3) 18.0
 
July 18, 2019, 4 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
 
July 18, 2019, 3 a.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (19) N/A N/A 1.1 μg/m3 (5) 19.0
 
July 18, 2019, 2 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 1.5 μg/m3 (6) 18.0
 
July 18, 2019, 1 a.m. N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) N/A N/A 1.5 μg/m3 (6) 19.0
 
July 18, 2019, midnight N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A N/A 1.1 μg/m3 (5) 20.0
 
July 17, 2019, 11 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 0.9 μg/m3 (4) 22.0
 
July 17, 2019, 10 p.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 0.9 μg/m3 (4) 22.0
 
July 17, 2019, 9 p.m. N/A 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A N/A 0.9 μg/m3 (4) 20.0
 
July 17, 2019, 8 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (19) N/A N/A 1.2 μg/m3 (5) 19.0
 
July 17, 2019, 7 p.m. N/A 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 2.3 μg/m3 (10) 17.0
 
July 17, 2019, 6 p.m. N/A 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 2.8 μg/m3 (12) 17.0
 
July 17, 2019, 5 p.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (16) N/A N/A 2.5 μg/m3 (10) 16.0
 
July 17, 2019, 4 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 20.0 ppb (15) N/A N/A 2.8 μg/m3 (12) 15.0
 
July 17, 2019, 3 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 18.0 ppb (14) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 17, 2019, 2 p.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A N/A 3.2 μg/m3 (13) 13.0
 
July 17, 2019, 1 p.m. N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (15) N/A N/A 2.7 μg/m3 (11) 15.0
 
July 17, 2019, noon N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 16.0 ppb (12) N/A N/A 3.2 μg/m3 (13) 13.0
 
July 17, 2019, 11 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 16.0 ppb (12) N/A N/A 3.4 μg/m3 (14) 14.0
 
July 17, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 18.0 ppb (14) N/A N/A 2.9 μg/m3 (12) 14.0
 
July 17, 2019, 9 a.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 19.0 ppb (15) N/A N/A 2.9 μg/m3 (12) 15.0
 
July 17, 2019, 8 a.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 21.0 ppb (16) N/A N/A 2.7 μg/m3 (11) 16.0
 
July 17, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (12) N/A N/A 2.8 μg/m3 (12) 12.0
 
July 17, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A N/A 3.6 μg/m3 (15) 15.0
 
July 17, 2019, 5 a.m. N/A -0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A N/A 3.6 μg/m3 (15) 15.0
 
July 17, 2019, 4 a.m. N/A -0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A N/A 3.3 μg/m3 (14) 15.0
 
July 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.4 μg/m3 (14) 14.0
 
July 17, 2019, 2 a.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) N/A N/A 3.5 μg/m3 (15) 25.0
 
July 17, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) N/A N/A 5.0 μg/m3 (21) 24.0