AQSQID: 000101301

Site Name: Langley

Location: Twsp of Langley, CC

Reporting: True, Located: True

Current AQI: 20.0

Twsp of Langley CC, CA: 49.09556, -122.56694

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 4.8 μg/m3 (20) 20.0
 
July 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 4.0 μg/m3 (17) 17.0
 
July 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 4.4 μg/m3 (18) 18.0
 
July 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 4.9 μg/m3 (20) 20.0
 
July 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 3.9 μg/m3 (16) 16.0
 
July 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.4 μg/m3 (10) 14.0
 
July 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 1.9 μg/m3 (8) 17.0
 
July 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 1.7 μg/m3 (7) 23.0
 
July 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
July 21, 2019, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 1.6 μg/m3 (7) 28.0
 
July 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 1.7 μg/m3 (7) 25.0
 
July 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 1.9 μg/m3 (8) 25.0
 
July 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
July 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 1.5 μg/m3 (6) 28.0
 
July 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 1.4 μg/m3 (6) 26.0
 
July 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.7 μg/m3 (7) 22.0
 
July 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 1.7 μg/m3 (7) 17.0
 
July 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 1.7 μg/m3 (7) 12.0
 
July 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 2.7 μg/m3 (11) 11.0
 
July 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 4.5 μg/m3 (19) 19.0
 
July 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 5.3 μg/m3 (22) 22.0
 
July 20, 2019, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 5.7 μg/m3 (24) 24.0
 
July 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 5.4 μg/m3 (23) 23.0
 
July 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 5.9 μg/m3 (25) 25.0
 
July 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 5.6 μg/m3 (23) 23.0
 
July 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 7.4 μg/m3 (31) 31.0
 
July 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 6.1 μg/m3 (25) 25.0
 
July 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 5.4 μg/m3 (23) 23.0
 
July 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 3.6 μg/m3 (15) 16.0
 
July 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 2.9 μg/m3 (12) 22.0
 
July 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.9 μg/m3 (12) 23.0
 
July 20, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.8 μg/m3 (12) 23.0
 
July 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.8 μg/m3 (12) 23.0
 
July 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.2 μg/m3 (9) 23.0
 
July 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.7 μg/m3 (7) 22.0
 
July 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 2.0 μg/m3 (8) 21.0
 
July 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 2.3 μg/m3 (10) 18.0
 
July 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 2.2 μg/m3 (9) 17.0
 
July 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 2.2 μg/m3 (9) 15.0
 
July 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 2.3 μg/m3 (10) 15.0
 
July 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 2.1 μg/m3 (9) 12.0
 
July 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 2.0 μg/m3 (8) 12.0
 
July 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.1 μg/m3 (9) 14.0
 
July 19, 2019, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.9 μg/m3 (12) 14.0
 
July 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 2.7 μg/m3 (11) 13.0
 
July 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.8 μg/m3 (12) 14.0
 
July 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 4.3 μg/m3 (18) 18.0
 
July 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 5.5 μg/m3 (23) 23.0
 
July 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 6.4 μg/m3 (27) 27.0
 
July 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 8.0 μg/m3 (33) 33.0
 
July 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 9.9 μg/m3 (41) 41.0
 
July 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 10.9 μg/m3 (45) 45.0
 
July 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 11.0 μg/m3 (46) 46.0
 
July 19, 2019, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 10.6 μg/m3 (44) 44.0
 
July 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 6.1 μg/m3 (25) 25.0
 
July 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 4.5 μg/m3 (19) 24.0
 
July 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 3.8 μg/m3 (16) 24.0
 
July 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 4.1 μg/m3 (17) 23.0
 
July 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.1 μg/m3 (13) 22.0
 
July 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
July 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 2.3 μg/m3 (10) 21.0
 
July 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 2.8 μg/m3 (12) 20.0
 
July 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 4.1 μg/m3 (17) 18.0
 
July 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 4.6 μg/m3 (19) 19.0
 
July 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 3.9 μg/m3 (16) 16.0
 
July 18, 2019, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 3.8 μg/m3 (16) 17.0
 
July 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 3.2 μg/m3 (13) 17.0
 
July 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 2.1 μg/m3 (9) 17.0
 
July 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 1.6 μg/m3 (7) 15.0
 
July 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 1.4 μg/m3 (6) 15.0
 
July 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 1.1 μg/m3 (5) 14.0
 
July 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 0.8 μg/m3 (3) 15.0
 
July 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 0.6 μg/m3 (2) 13.0
 
July 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 0.5 μg/m3 (2) 12.0
 
July 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 0.4 μg/m3 (2) 13.0
 
July 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 0.3 μg/m3 (1) 13.0
 
July 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 0.2 μg/m3 (1) 14.0
 
July 18, 2019, midnight N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 0.2 μg/m3 (1) 13.0
 
July 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 0.4 μg/m3 (2) 13.0
 
July 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 0.6 μg/m3 (2) 14.0
 
July 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 1.0 μg/m3 (4) 15.0
 
July 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 0.9 μg/m3 (4) 15.0
 
July 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 1.0 μg/m3 (4) 15.0
 
July 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 0.9 μg/m3 (4) 15.0
 
July 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 1.3 μg/m3 (5) 14.0
 
July 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 0.6 μg/m3 (2) 13.0
 
July 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 0.8 μg/m3 (3) 12.0
 
July 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 1.4 μg/m3 (6) 11.0
 
July 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 1.5 μg/m3 (6) 11.0
 
July 17, 2019, noon N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 1.9 μg/m3 (8) 12.0
 
July 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 1.9 μg/m3 (8) 12.0
 
July 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 2.0 μg/m3 (8) 12.0
 
July 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 2.0 μg/m3 (8) 12.0
 
July 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 2.1 μg/m3 (9) 15.0
 
July 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 2.0 μg/m3 (8) 15.0
 
July 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 2.2 μg/m3 (9) 17.0
 
July 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 2.5 μg/m3 (10) 16.0
 
July 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 1.9 μg/m3 (8) 18.0
 
July 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.8 μg/m3 (8) 21.0
 
July 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 1.3 μg/m3 (5) 22.0
 
July 17, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 1.5 μg/m3 (6) 23.0
 
July 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 1.3 μg/m3 (5) 23.0
 
July 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 1.6 μg/m3 (7) 24.0
 
July 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 2.0 μg/m3 (8) 24.0
 
July 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 2.4 μg/m3 (10) 24.0
 
July 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.5 μg/m3 (6) 21.0
 
July 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 1.4 μg/m3 (6) 19.0
 
July 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 1.9 μg/m3 (8) 16.0
 
July 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 4.0 μg/m3 (17) 17.0
 
July 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 4.5 μg/m3 (19) 19.0
 
July 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 5.1 μg/m3 (21) 21.0
 
July 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 16, 2019, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 6.8 μg/m3 (28) 28.0
 
July 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 6.5 μg/m3 (27) 27.0
 
July 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 5.9 μg/m3 (25) 25.0
 
July 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 5.5 μg/m3 (23) 23.0
 
July 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A 3.9 μg/m3 (16) 16.0
 
July 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 4.2 μg/m3 (18) 18.0
 
July 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 3.4 μg/m3 (14) 16.0
 
July 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 3.3 μg/m3 (14) 19.0
 
July 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.5 μg/m3 (15) 22.0
 
July 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.6 μg/m3 (15) 25.0
 
July 16, 2019, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 3.7 μg/m3 (15) 26.0
 
July 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 3.2 μg/m3 (13) 26.0
 
July 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.0 μg/m3 (8) 23.0
 
July 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
July 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.3 μg/m3 (10) 23.0
 
July 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 3.1 μg/m3 (13) 23.0
 
July 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 3.2 μg/m3 (13) 19.0
 
July 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 2.4 μg/m3 (10) 16.0
 
July 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.3 μg/m3 (10) 14.0
 
July 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 2.6 μg/m3 (11) 12.0
 
July 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 3.6 μg/m3 (15) 15.0
 
July 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 15, 2019, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 3.9 μg/m3 (16) 16.0
 
July 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.6 μg/m3 (15) 15.0
 
July 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.4 μg/m3 (14) 14.0
 
July 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 2.7 μg/m3 (11) 11.0
 
July 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 2.7 μg/m3 (11) 11.0
 
July 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A 2.5 μg/m3 (10) 10.0
 
July 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 2.4 μg/m3 (10) 10.0
 
July 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 2.2 μg/m3 (9) 13.0
 
July 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 1.9 μg/m3 (8) 18.0
 
July 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.6 μg/m3 (7) 22.0
 
July 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 1.4 μg/m3 (6) 23.0
 
July 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 1.3 μg/m3 (5) 25.0
 
July 15, 2019, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 1.5 μg/m3 (6) 26.0
 
July 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 2.0 μg/m3 (8) 26.0
 
July 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 1.3 μg/m3 (5) 25.0
 
July 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 1.5 μg/m3 (6) 25.0
 
July 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 2.3 μg/m3 (10) 18.0
 
July 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 3.1 μg/m3 (13) 14.0
 
July 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 2.8 μg/m3 (12) 15.0
 
July 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 3.1 μg/m3 (13) 15.0
 
July 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 3.3 μg/m3 (14) 14.0
 
July 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 3.9 μg/m3 (16) 16.0
 
July 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 4.3 μg/m3 (18) 18.0
 
July 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 4.9 μg/m3 (20) 20.0
 
July 14, 2019, noon N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 4.7 μg/m3 (20) 20.0
 
July 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 4.2 μg/m3 (18) 18.0
 
July 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 4.3 μg/m3 (18) 18.0