AQSQID: 000102701

Site Name: Williams Lake Columneetza School

Location: Williams Lake, CC

Reporting: False, Located: True

Current AQI: None

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
May 19, 2019, 7 a.m. N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 9.0 ppb (7) N/A N/A 1.0 μg/m3 (4) 7.0
 
May 19, 2019, 6 a.m. N/A 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 8.0 ppb (6) N/A N/A 2.1 μg/m3 (9) 9.0
 
May 19, 2019, 5 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) N/A N/A 2.6 μg/m3 (11) 12.0
 
May 19, 2019, 4 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A N/A 1.1 μg/m3 (5) 16.0
 
May 19, 2019, 3 a.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 1.1 μg/m3 (5) 18.0
 
May 19, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (19) N/A N/A 1.0 μg/m3 (4) 19.0
 
May 19, 2019, 1 a.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A N/A 1.4 μg/m3 (6) 20.0
 
May 19, 2019, midnight N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) N/A N/A 1.1 μg/m3 (5) 21.0
 
May 18, 2019, 11 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A N/A 1.2 μg/m3 (5) 20.0
 
May 18, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A N/A 1.8 μg/m3 (8) 18.0
 
May 18, 2019, 9 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 1.7 μg/m3 (7) 18.0
 
May 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 1.7 μg/m3 (7) 18.0
 
May 18, 2019, 7 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 22.0 ppb (17) N/A N/A 1.6 μg/m3 (7) 17.0
 
May 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
May 18, 2019, 5 p.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 16.0 ppb (12) N/A N/A 1.4 μg/m3 (6) 12.0
 
May 18, 2019, 4 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 13.0 ppb (10) N/A N/A 1.7 μg/m3 (7) 10.0
 
May 18, 2019, 3 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 10.0 ppb (8) N/A N/A 1.6 μg/m3 (7) 8.0
 
May 18, 2019, 2 p.m. N/A 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 7.0 ppb (5) N/A N/A 3.4 μg/m3 (14) 14.0
 
May 18, 2019, 1 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 7.0 ppb (5) N/A N/A 4.6 μg/m3 (19) 19.0
 
May 18, 2019, noon N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 8.0 ppb (6) N/A N/A 4.5 μg/m3 (19) 19.0
 
May 18, 2019, 11 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 3.1 μg/m3 (13) 13.0
 
May 18, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 7.0 ppb (5) N/A N/A 3.2 μg/m3 (13) 13.0
 
May 18, 2019, 9 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 9.0 ppb (7) N/A N/A 3.3 μg/m3 (14) 14.0
 
May 18, 2019, 8 a.m. N/A -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 11.0 ppb (8) N/A N/A 3.6 μg/m3 (15) 15.0
 
May 18, 2019, 7 a.m. N/A -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (10) N/A N/A 3.8 μg/m3 (16) 16.0
 
May 18, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) N/A N/A 3.0 μg/m3 (12) 12.0
 
May 18, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A N/A 3.0 μg/m3 (12) 13.0
 
May 18, 2019, 4 a.m. N/A -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) N/A N/A 3.5 μg/m3 (15) 15.0
 
May 18, 2019, 3 a.m. N/A -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) N/A N/A 3.6 μg/m3 (15) 15.0
 
May 18, 2019, 2 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A N/A 2.2 μg/m3 (9) 20.0
 
May 18, 2019, 1 a.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) N/A N/A 1.2 μg/m3 (5) 17.0
 
May 18, 2019, midnight N/A 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A N/A 1.0 μg/m3 (4) 16.0
 
May 17, 2019, 11 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) N/A N/A 1.0 μg/m3 (4) 18.0
 
May 17, 2019, 10 p.m. N/A 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) N/A N/A 1.2 μg/m3 (5) 18.0
 
May 17, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A N/A 1.7 μg/m3 (7) 17.0
 
May 17, 2019, 8 p.m. N/A 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) N/A N/A 3.3 μg/m3 (14) 14.0
 
May 17, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) N/A N/A 3.2 μg/m3 (13) 13.0
 
May 17, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) N/A N/A 3.1 μg/m3 (13) 13.0
 
May 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.3 μg/m3 (10) 10.0
 
May 17, 2019, 4 p.m. N/A 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (6) N/A N/A 3.4 μg/m3 (14) 14.0
 
May 17, 2019, 3 p.m. N/A 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (6) N/A N/A 2.7 μg/m3 (11) 11.0
 
May 17, 2019, 2 p.m. N/A 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 2.2 μg/m3 (9) 9.0
 
May 17, 2019, 1 p.m. N/A 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (6) N/A N/A 2.1 μg/m3 (9) 9.0
 
May 17, 2019, noon N/A -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 11.0 ppb (8) N/A N/A 1.5 μg/m3 (6) 8.0
 
May 17, 2019, 11 a.m. N/A -0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 12.0 ppb (9) N/A N/A 2.0 μg/m3 (8) 9.0
 
May 17, 2019, 10 a.m. N/A -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 14.0 ppb (11) N/A N/A 1.3 μg/m3 (5) 11.0
 
May 17, 2019, 9 a.m. N/A -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 15.0 ppb (12) N/A N/A 1.4 μg/m3 (6) 12.0
 
May 17, 2019, 8 a.m. N/A -0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 1.3 μg/m3 (5) 14.0
 
May 17, 2019, 7 a.m. N/A -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) N/A N/A 1.5 μg/m3 (6) 16.0
 
May 17, 2019, 6 a.m. N/A -0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) N/A N/A 2.3 μg/m3 (10) 18.0
 
May 17, 2019, 5 a.m. N/A -0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) N/A N/A 1.9 μg/m3 (8) 21.0
 
May 17, 2019, 4 a.m. N/A -0.6 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 0.9 μg/m3 (4) 25.0
 
May 17, 2019, 3 a.m. N/A -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A N/A 0.7 μg/m3 (3) 27.0
 
May 17, 2019, 2 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) N/A N/A 0.8 μg/m3 (3) 29.0
 
May 17, 2019, 1 a.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
May 17, 2019, midnight N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 0.8 μg/m3 (3) 30.0
 
May 16, 2019, 11 p.m. N/A 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 0.8 μg/m3 (3) 30.0
 
May 16, 2019, 10 p.m. N/A 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 1.0 μg/m3 (4) 30.0
 
May 16, 2019, 9 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 1.1 μg/m3 (5) 30.0
 
May 16, 2019, 8 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 1.1 μg/m3 (5) 30.0
 
May 16, 2019, 7 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) N/A N/A 1.2 μg/m3 (5) 29.0
 
May 16, 2019, 6 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A N/A 1.2 μg/m3 (5) 28.0
 
May 16, 2019, 5 p.m. N/A 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
May 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.3 μg/m3 (18) 18.0
 
May 16, 2019, 3 p.m. N/A 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (15) N/A N/A 5.1 μg/m3 (21) 21.0
 
May 16, 2019, 2 p.m. N/A 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 5.5 μg/m3 (23) 23.0
 
May 16, 2019, 1 p.m. N/A 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 10.0 ppb (8) N/A N/A 2.7 μg/m3 (11) 11.0
 
May 16, 2019, noon N/A -0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 3.1 μg/m3 (13) 13.0
 
May 16, 2019, 11 a.m. N/A -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 11.0 ppb (8) N/A N/A 2.6 μg/m3 (11) 11.0
 
May 16, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 14.0 ppb (11) N/A N/A 2.3 μg/m3 (10) 11.0
 
May 16, 2019, 9 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 17.0 ppb (13) N/A N/A 3.1 μg/m3 (13) 13.0
 
May 16, 2019, 8 a.m. N/A -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) N/A N/A 2.5 μg/m3 (10) 13.0
 
May 16, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) N/A N/A 3.4 μg/m3 (14) 15.0
 
May 16, 2019, 6 a.m. N/A -0.6 ppb (0) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) N/A N/A 2.0 μg/m3 (8) 19.0
 
May 16, 2019, 5 a.m. N/A -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A N/A 1.4 μg/m3 (6) 25.0
 
May 16, 2019, 4 a.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) N/A N/A 1.1 μg/m3 (5) 27.0
 
May 16, 2019, 3 a.m. N/A -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 1.2 μg/m3 (5) 28.0
 
May 16, 2019, 2 a.m. N/A -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 1.2 μg/m3 (5) 30.0
 
May 16, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 1.2 μg/m3 (5) 32.0
 
May 16, 2019, midnight N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 1.2 μg/m3 (5) 32.0
 
May 15, 2019, 11 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 1.2 μg/m3 (5) 32.0
 
May 15, 2019, 9 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 1.1 μg/m3 (5) 32.0
 
May 15, 2019, 8 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 1.0 μg/m3 (4) 31.0
 
May 15, 2019, 7 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 1.0 μg/m3 (4) 31.0
 
May 15, 2019, 6 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 1.1 μg/m3 (5) 31.0
 
May 15, 2019, 5 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
May 15, 2019, 4 p.m. N/A 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) N/A N/A 5.3 μg/m3 (22) 22.0
 
May 15, 2019, 3 p.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
 
May 15, 2019, 2 p.m. N/A 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 2.8 μg/m3 (12) 12.0
 
May 15, 2019, 1 p.m. N/A 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 7.0 ppb (5) N/A N/A 2.7 μg/m3 (11) 11.0
 
May 15, 2019, noon N/A 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 7.0 ppb (5) N/A N/A 3.5 μg/m3 (15) 15.0
 
May 15, 2019, 11 a.m. N/A -0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 4.3 μg/m3 (18) 18.0
 
May 15, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) N/A N/A 2.7 μg/m3 (11) 11.0
 
May 15, 2019, 9 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 1.8 μg/m3 (8) 13.0
 
May 15, 2019, 8 a.m. N/A -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) N/A N/A 1.6 μg/m3 (7) 15.0
 
May 15, 2019, 7 a.m. N/A -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A N/A 2.9 μg/m3 (12) 22.0
 
May 15, 2019, 6 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 4.0 μg/m3 (17) 25.0
 
May 15, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 15, 2019, 4 a.m. N/A -0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) N/A N/A 11.2 μg/m3 (47) 47.0
 
May 15, 2019, 3 a.m. N/A -0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 15, 2019, 2 a.m. N/A -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 3.8 μg/m3 (16) 30.0
 
May 15, 2019, 1 a.m. N/A -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 3.6 μg/m3 (15) 33.0
 
May 15, 2019, midnight N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
May 14, 2019, 11 p.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 3.8 μg/m3 (16) 36.0
 
May 14, 2019, 10 p.m. N/A -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 5.8 μg/m3 (24) 38.0
 
May 14, 2019, 9 p.m. N/A -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 5.7 μg/m3 (24) 40.0
 
May 14, 2019, 8 p.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 5.9 μg/m3 (25) 40.0
 
May 14, 2019, 7 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 5.6 μg/m3 (23) 38.0
 
May 14, 2019, 5 p.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 6.1 μg/m3 (25) 32.0
 
May 14, 2019, 4 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 6.6 μg/m3 (28) 32.0
 
May 14, 2019, 3 p.m. N/A 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) N/A N/A 8.5 μg/m3 (35) 35.0
 
May 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.3 μg/m3 (39) 39.0
 
May 14, 2019, 1 p.m. N/A -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) N/A N/A 9.5 μg/m3 (40) 40.0
 
May 14, 2019, noon N/A -0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 14, 2019, 11 a.m. N/A -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 10.0 μg/m3 (42) 42.0
 
May 14, 2019, 10 a.m. N/A -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A N/A 10.7 μg/m3 (45) 45.0
 
May 14, 2019, 9 a.m. N/A -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) N/A N/A 8.2 μg/m3 (34) 34.0
 
May 14, 2019, 8 a.m. N/A -0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 10.6 μg/m3 (44) 44.0
 
May 14, 2019, 7 a.m. N/A -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 5.9 μg/m3 (25) 35.0
 
May 14, 2019, 6 a.m. N/A -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 3.8 μg/m3 (16) 40.0
 
May 14, 2019, 5 a.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 4.1 μg/m3 (17) 40.0
 
May 14, 2019, 4 a.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 3.8 μg/m3 (16) 37.0
 
May 14, 2019, 3 a.m. N/A -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 3.7 μg/m3 (15) 36.0
 
May 14, 2019, 2 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 3.1 μg/m3 (13) 40.0
 
May 14, 2019, 1 a.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 2.6 μg/m3 (11) 42.0
 
May 14, 2019, midnight N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 2.5 μg/m3 (10) 42.0
 
May 13, 2019, 11 p.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 3.0 μg/m3 (12) 43.0
 
May 13, 2019, 10 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 2.7 μg/m3 (11) 43.0
 
May 13, 2019, 9 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A N/A 2.9 μg/m3 (12) 42.0
 
May 13, 2019, 8 p.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 3.1 μg/m3 (13) 42.0
 
May 13, 2019, 7 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A N/A 2.8 μg/m3 (12) 42.0
 
May 13, 2019, 6 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 2.8 μg/m3 (12) 38.0
 
May 13, 2019, 5 p.m. N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 3.1 μg/m3 (13) 36.0
 
May 13, 2019, 4 p.m. N/A 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A N/A 15.2 μg/m3 (57) 57.0
 
May 13, 2019, 3 p.m. N/A 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 23.4 μg/m3 (74) 74.0
 
May 13, 2019, 2 p.m. N/A 1.4 ppb (1) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) N/A N/A 20.9 μg/m3 (69) 69.0
 
May 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.4 μg/m3 (43) 43.0
 
May 13, 2019, noon N/A 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) N/A N/A 7.8 μg/m3 (32) 32.0
 
May 13, 2019, 11 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 13, 2019, 10 a.m. N/A -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) N/A N/A 8.6 μg/m3 (36) 36.0
 
May 13, 2019, 9 a.m. N/A -0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) N/A N/A 13.2 μg/m3 (53) 53.0
 
May 13, 2019, 8 a.m. N/A -0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 23.0 ppb (18) N/A N/A 14.0 μg/m3 (54) 54.0
 
May 13, 2019, 7 a.m. N/A -0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) N/A N/A 12.7 μg/m3 (51) 51.0
 
May 13, 2019, 6 a.m. N/A -0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) N/A N/A 7.9 μg/m3 (33) 33.0
 
May 13, 2019, 5 a.m. N/A -0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A 6.3 μg/m3 (26) 26.0
 
May 13, 2019, 4 a.m. N/A -0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 7.2 μg/m3 (30) 30.0
 
May 13, 2019, 3 a.m. N/A -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 5.9 μg/m3 (25) 35.0
 
May 13, 2019, 2 a.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 4.7 μg/m3 (20) 38.0
 
May 13, 2019, 1 a.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 4.2 μg/m3 (18) 39.0
 
May 13, 2019, midnight N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 3.9 μg/m3 (16) 40.0
 
May 12, 2019, 11 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 3.4 μg/m3 (14) 40.0
 
May 12, 2019, 10 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 3.2 μg/m3 (13) 39.0
 
May 12, 2019, 9 p.m. N/A -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 3.0 μg/m3 (12) 38.0
 
May 12, 2019, 8 p.m. N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 2.9 μg/m3 (12) 38.0
 
May 12, 2019, 7 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 3.1 μg/m3 (13) 37.0
 
May 12, 2019, 6 p.m. N/A -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 52.0 ppb (40) N/A N/A 3.4 μg/m3 (14) 40.0
 
May 12, 2019, 5 p.m. N/A -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 3.8 μg/m3 (16) 41.0
 
May 12, 2019, 4 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 4.7 μg/m3 (20) 35.0
 
May 12, 2019, 3 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 4.4 μg/m3 (18) 35.0
 
May 12, 2019, 2 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 8.2 μg/m3 (34) 35.0
 
May 12, 2019, 1 p.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 9.1 μg/m3 (38) 38.0
 
May 12, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
May 12, 2019, 11 a.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 7.6 μg/m3 (32) 35.0
 
May 12, 2019, 10 a.m. N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 8.2 μg/m3 (34) 39.0
 
May 12, 2019, 9 a.m. N/A -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 8.1 μg/m3 (34) 38.0
 
May 12, 2019, 8 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 11.7 μg/m3 (49) 49.0
 
May 12, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 11.8 μg/m3 (49) 49.0
 
May 12, 2019, 6 a.m. N/A -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A N/A 10.8 μg/m3 (45) 45.0