AQSQID: 000102701

Site Name: Williams Lake Columneetza School

Location: Williams Lake, CC

Reporting: True, Located: True

Current AQI: 40.0

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
Jan. 18, 2019, 11 a.m. N/A 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (10) N/A N/A 9.7 μg/m3 (40) 40.0
 
Jan. 18, 2019, 10 a.m. N/A -0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 7.6 μg/m3 (32) 32.0
 
Jan. 18, 2019, 9 a.m. N/A 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 5.8 μg/m3 (24) 24.0
 
Jan. 18, 2019, 8 a.m. N/A 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 15.0 ppb (12) N/A N/A 5.2 μg/m3 (22) 22.0
 
Jan. 18, 2019, 7 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 4.7 μg/m3 (20) 20.0
 
Jan. 18, 2019, 6 a.m. N/A 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 4.6 μg/m3 (19) 19.0
 
Jan. 18, 2019, 5 a.m. N/A 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 4.5 μg/m3 (19) 19.0
 
Jan. 18, 2019, 4 a.m. N/A -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (12) N/A N/A 3.6 μg/m3 (15) 15.0
 
Jan. 18, 2019, 3 a.m. N/A 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (12) N/A N/A 3.9 μg/m3 (16) 16.0
 
Jan. 18, 2019, 2 a.m. N/A 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (12) N/A N/A 4.8 μg/m3 (20) 20.0
 
Jan. 18, 2019, 1 a.m. N/A 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 4.8 μg/m3 (20) 20.0
 
Jan. 18, 2019, midnight N/A 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 5.4 μg/m3 (23) 23.0
 
Jan. 17, 2019, 11 p.m. N/A 2.3 ppb (2) N/A 7.0 ppb (6) N/A N/A 14.0 ppb (11) N/A N/A 5.6 μg/m3 (23) 23.0
 
Jan. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.6 μg/m3 (15) 15.0
 
Jan. 17, 2019, 9 p.m. N/A 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 15.0 ppb (12) N/A N/A 4.4 μg/m3 (18) 18.0
 
Jan. 17, 2019, 8 p.m. N/A 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 17, 2019, 7 p.m. N/A 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 12.0 ppb (9) N/A N/A 7.8 μg/m3 (32) 32.0
 
Jan. 17, 2019, 6 p.m. N/A 10.8 ppb (10) N/A 13.0 ppb (12) N/A N/A 5.0 ppb (4) N/A N/A 16.8 μg/m3 (60) 60.0
 
Jan. 17, 2019, 5 p.m. N/A 11.6 ppb (11) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) N/A N/A 17.9 μg/m3 (63) 63.0
 
Jan. 17, 2019, 4 p.m. N/A 12.3 ppb (11) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) N/A N/A 17.3 μg/m3 (61) 61.0
 
Jan. 17, 2019, 3 p.m. N/A 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A 2.0 ppb (2) N/A N/A 19.5 μg/m3 (66) 66.0
 
Jan. 17, 2019, 2 p.m. N/A 3.8 ppb (4) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 17, 2019, 1 p.m. N/A 5.6 ppb (5) N/A 18.0 ppb (17) N/A N/A 0.0 ppb (0) N/A N/A 22.3 μg/m3 (72) 72.0
 
Jan. 17, 2019, noon N/A 2.4 ppb (2) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) N/A N/A 22.8 μg/m3 (73) 73.0
 
Jan. 17, 2019, 11 a.m. N/A 1.7 ppb (2) N/A 15.0 ppb (14) N/A N/A 2.0 ppb (2) N/A N/A 18.1 μg/m3 (63) 63.0
 
Jan. 17, 2019, 10 a.m. N/A 0.9 ppb (1) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) N/A N/A 16.9 μg/m3 (60) 60.0
 
Jan. 17, 2019, 9 a.m. N/A 1.8 ppb (2) N/A 11.0 ppb (10) N/A N/A 5.0 ppb (4) N/A N/A 18.9 μg/m3 (65) 65.0
 
Jan. 17, 2019, 8 a.m. N/A 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A 7.0 ppb (5) N/A N/A 12.3 μg/m3 (51) 51.0
 
Jan. 17, 2019, 7 a.m. N/A 1.9 ppb (2) N/A 10.0 ppb (9) N/A N/A 9.0 ppb (7) N/A N/A 11.2 μg/m3 (47) 47.0
 
Jan. 17, 2019, 6 a.m. N/A 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 9.0 ppb (7) N/A N/A 15.1 μg/m3 (57) 57.0
 
Jan. 17, 2019, 5 a.m. N/A 1.9 ppb (2) N/A 12.0 ppb (11) N/A N/A 7.0 ppb (5) N/A N/A 14.1 μg/m3 (54) 54.0
 
Jan. 17, 2019, 4 a.m. N/A 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 9.0 ppb (7) N/A N/A 11.4 μg/m3 (48) 48.0
 
Jan. 17, 2019, 3 a.m. N/A -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 17, 2019, 2 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 7.9 μg/m3 (33) 33.0
 
Jan. 17, 2019, 1 a.m. N/A 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 11.0 ppb (8) N/A N/A 10.1 μg/m3 (42) 42.0
 
Jan. 17, 2019, midnight N/A 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A 11.0 ppb (8) N/A N/A 9.3 μg/m3 (39) 39.0
 
Jan. 16, 2019, 11 p.m. N/A 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 16.0 ppb (12) N/A N/A 8.9 μg/m3 (37) 37.0
 
Jan. 16, 2019, 10 p.m. N/A 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 7.2 μg/m3 (30) 30.0
 
Jan. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.2 μg/m3 (34) 34.0
 
Jan. 16, 2019, 8 p.m. N/A 7.2 ppb (7) N/A 8.0 ppb (7) N/A N/A 15.0 ppb (12) N/A N/A 15.6 μg/m3 (58) 58.0
 
Jan. 16, 2019, 7 p.m. N/A 4.5 ppb (4) N/A 6.0 ppb (6) N/A N/A 16.0 ppb (12) N/A N/A 10.7 μg/m3 (45) 45.0
 
Jan. 16, 2019, 6 p.m. N/A 3.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) N/A N/A 12.6 μg/m3 (51) 51.0
 
Jan. 16, 2019, 5 p.m. N/A 2.1 ppb (2) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) N/A N/A 13.1 μg/m3 (52) 52.0
 
Jan. 16, 2019, 4 p.m. N/A 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) N/A N/A 10.9 μg/m3 (45) 45.0
 
Jan. 16, 2019, 3 p.m. N/A -0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 14.0 ppb (11) N/A N/A 10.6 μg/m3 (44) 44.0
 
Jan. 16, 2019, 2 p.m. N/A 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 13.0 ppb (10) N/A N/A 10.4 μg/m3 (43) 43.0
 
Jan. 16, 2019, 1 p.m. N/A 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 13.0 ppb (10) N/A N/A 14.1 μg/m3 (54) 54.0
 
Jan. 16, 2019, noon N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 8.9 μg/m3 (37) 37.0
 
Jan. 16, 2019, 11 a.m. N/A 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (12) N/A N/A 8.2 μg/m3 (34) 34.0
 
Jan. 16, 2019, 10 a.m. N/A 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 14.0 ppb (11) N/A N/A 8.5 μg/m3 (35) 35.0
 
Jan. 16, 2019, 9 a.m. N/A 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 11.5 μg/m3 (48) 48.0
 
Jan. 16, 2019, 8 a.m. N/A 1.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 5.0 ppb (4) N/A N/A 16.8 μg/m3 (60) 60.0
 
Jan. 16, 2019, 7 a.m. N/A 1.3 ppb (1) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) N/A N/A 22.5 μg/m3 (72) 72.0
 
Jan. 16, 2019, 6 a.m. N/A 7.0 ppb (6) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) N/A N/A 25.5 μg/m3 (79) 79.0
 
Jan. 16, 2019, 5 a.m. N/A 15.5 ppb (14) N/A 23.0 ppb (21) N/A N/A 0.0 ppb (0) N/A N/A 24.4 μg/m3 (76) 76.0
 
Jan. 16, 2019, 4 a.m. N/A 16.7 ppb (15) N/A 22.0 ppb (20) N/A N/A 0.0 ppb (0) N/A N/A 28.6 μg/m3 (85) 85.0
 
Jan. 16, 2019, 3 a.m. N/A 6.9 ppb (6) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) N/A N/A 24.4 μg/m3 (76) 76.0
 
Jan. 16, 2019, 2 a.m. N/A 1.1 ppb (1) N/A 16.0 ppb (15) N/A N/A 6.0 ppb (5) N/A N/A 17.8 μg/m3 (62) 62.0
 
Jan. 16, 2019, 1 a.m. N/A 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 14.0 ppb (11) N/A N/A 14.5 μg/m3 (55) 55.0
 
Jan. 16, 2019, midnight N/A 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 8.4 μg/m3 (35) 35.0
 
Jan. 15, 2019, 11 p.m. N/A 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 3.4 μg/m3 (14) 14.0
 
Jan. 15, 2019, 10 p.m. N/A 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 15, 2019, 9 p.m. N/A 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (13) N/A N/A 3.1 μg/m3 (13) 13.0
 
Jan. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.6 μg/m3 (15) 15.0
 
Jan. 15, 2019, 7 p.m. N/A 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 3.9 μg/m3 (16) 16.0
 
Jan. 15, 2019, 6 p.m. N/A 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A N/A 3.6 μg/m3 (15) 15.0
 
Jan. 15, 2019, 5 p.m. N/A 4.6 ppb (4) N/A 10.0 ppb (9) N/A N/A 11.0 ppb (8) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 15, 2019, 4 p.m. N/A 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 13.0 ppb (10) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 15, 2019, 3 p.m. N/A 2.1 ppb (2) N/A 11.0 ppb (10) N/A N/A 11.0 ppb (8) N/A N/A 13.2 μg/m3 (53) 53.0
 
Jan. 15, 2019, 2 p.m. N/A 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) N/A N/A 4.9 μg/m3 (20) 20.0
 
Jan. 15, 2019, 1 p.m. N/A 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 3.8 μg/m3 (16) 16.0
 
Jan. 15, 2019, noon N/A 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (12) N/A N/A 3.3 μg/m3 (14) 14.0
 
Jan. 15, 2019, 11 a.m. N/A 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 13.0 ppb (10) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 15, 2019, 10 a.m. N/A 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 6.0 ppb (5) N/A N/A 8.2 μg/m3 (34) 34.0
 
Jan. 15, 2019, 9 a.m. N/A 1.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 4.0 ppb (3) N/A N/A 8.6 μg/m3 (36) 36.0
 
Jan. 15, 2019, 8 a.m. N/A 2.1 ppb (2) N/A 14.0 ppb (13) N/A N/A 2.0 ppb (2) N/A N/A 7.8 μg/m3 (32) 32.0
 
Jan. 15, 2019, 7 a.m. N/A 1.7 ppb (2) N/A 10.0 ppb (9) N/A N/A 5.0 ppb (4) N/A N/A 6.1 μg/m3 (25) 25.0
 
Jan. 15, 2019, 6 a.m. N/A 1.1 ppb (1) N/A 9.0 ppb (8) N/A N/A 8.0 ppb (6) N/A N/A 8.6 μg/m3 (36) 36.0
 
Jan. 15, 2019, 5 a.m. N/A 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 9.0 ppb (7) N/A N/A 14.0 μg/m3 (54) 54.0
 
Jan. 15, 2019, 4 a.m. N/A 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 10.0 ppb (8) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 15, 2019, 3 a.m. N/A 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 13.0 ppb (10) N/A N/A 2.4 μg/m3 (10) 10.0
 
Jan. 15, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 13.0 ppb (10) N/A N/A 3.3 μg/m3 (14) 14.0
 
Jan. 15, 2019, 1 a.m. N/A 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) N/A N/A 2.2 μg/m3 (9) 10.0
 
Jan. 15, 2019, midnight N/A 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 14.0 ppb (11) N/A N/A 1.7 μg/m3 (7) 11.0
 
Jan. 14, 2019, 11 p.m. N/A 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) N/A N/A 2.0 μg/m3 (8) 12.0
 
Jan. 14, 2019, 10 p.m. N/A 5.4 ppb (5) N/A 7.0 ppb (6) N/A N/A 11.0 ppb (8) N/A N/A 7.6 μg/m3 (32) 32.0
 
Jan. 14, 2019, 9 p.m. N/A 5.8 ppb (5) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) N/A N/A 12.4 μg/m3 (51) 51.0
 
Jan. 14, 2019, 8 p.m. N/A 9.1 ppb (8) N/A 9.0 ppb (8) N/A N/A 11.0 ppb (8) N/A N/A 9.6 μg/m3 (40) 40.0
 
Jan. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 22.4 μg/m3 (72) 72.0
 
Jan. 14, 2019, 6 p.m. N/A 21.9 ppb (20) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) N/A N/A 10.4 μg/m3 (43) 43.0
 
Jan. 14, 2019, 5 p.m. N/A 32.9 ppb (30) N/A 17.0 ppb (16) N/A N/A -1.0 ppb (0) N/A N/A 12.4 μg/m3 (51) 51.0
 
Jan. 14, 2019, 4 p.m. N/A 42.3 ppb (39) N/A 22.0 ppb (20) N/A N/A 0.0 ppb (0) N/A N/A 9.9 μg/m3 (41) 41.0
 
Jan. 14, 2019, 3 p.m. N/A 49.9 ppb (46) N/A 22.0 ppb (20) N/A N/A -1.0 ppb (0) N/A N/A 10.2 μg/m3 (42) 46.0
 
Jan. 14, 2019, 2 p.m. N/A 28.6 ppb (26) N/A 21.0 ppb (19) N/A N/A -1.0 ppb (0) N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 14, 2019, 1 p.m. N/A 9.1 ppb (8) N/A 17.0 ppb (16) N/A N/A 1.0 ppb (1) N/A N/A 9.5 μg/m3 (40) 40.0
 
Jan. 14, 2019, noon N/A 2.3 ppb (2) N/A 11.0 ppb (10) N/A N/A 6.0 ppb (5) N/A N/A 9.9 μg/m3 (41) 41.0
 
Jan. 14, 2019, 11 a.m. N/A 6.2 ppb (6) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) N/A N/A 9.2 μg/m3 (38) 38.0
 
Jan. 14, 2019, 10 a.m. N/A 2.9 ppb (3) N/A 16.0 ppb (15) N/A N/A 4.0 ppb (3) N/A N/A 11.3 μg/m3 (47) 47.0
 
Jan. 14, 2019, 9 a.m. N/A 7.1 ppb (7) N/A 20.0 ppb (19) N/A N/A 0.0 ppb (0) N/A N/A 19.7 μg/m3 (66) 66.0
 
Jan. 14, 2019, 8 a.m. N/A 3.8 ppb (4) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) N/A N/A 21.7 μg/m3 (71) 71.0
 
Jan. 14, 2019, 7 a.m. N/A 5.1 ppb (5) N/A 19.0 ppb (18) N/A N/A 3.0 ppb (2) N/A N/A 16.4 μg/m3 (59) 59.0
 
Jan. 14, 2019, 6 a.m. N/A 5.7 ppb (5) N/A 22.0 ppb (20) N/A N/A 1.0 ppb (1) N/A N/A 16.8 μg/m3 (60) 60.0
 
Jan. 14, 2019, 5 a.m. N/A 2.7 ppb (3) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) N/A N/A 23.2 μg/m3 (74) 74.0
 
Jan. 14, 2019, 4 a.m. N/A 13.6 ppb (13) N/A 26.0 ppb (24) N/A N/A 0.0 ppb (0) N/A N/A 25.4 μg/m3 (79) 79.0
 
Jan. 14, 2019, 3 a.m. N/A 12.7 ppb (12) N/A 26.0 ppb (24) N/A N/A 1.0 ppb (1) N/A N/A 14.8 μg/m3 (56) 56.0
 
Jan. 14, 2019, 2 a.m. N/A 16.4 ppb (15) N/A 27.0 ppb (25) N/A N/A 0.0 ppb (0) N/A N/A 17.4 μg/m3 (61) 61.0
 
Jan. 14, 2019, 1 a.m. N/A 6.2 ppb (6) N/A 21.0 ppb (19) N/A N/A 5.0 ppb (4) N/A N/A 20.6 μg/m3 (68) 68.0
 
Jan. 14, 2019, midnight N/A 1.2 ppb (1) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) N/A N/A 7.6 μg/m3 (32) 32.0
 
Jan. 13, 2019, 11 p.m. N/A 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 21.0 ppb (16) N/A N/A 5.8 μg/m3 (24) 24.0
 
Jan. 13, 2019, 10 p.m. N/A 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 22.0 ppb (17) N/A N/A 5.4 μg/m3 (23) 23.0
 
Jan. 13, 2019, 9 p.m. N/A 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (18) N/A N/A 2.7 μg/m3 (11) 18.0
 
Jan. 13, 2019, 8 p.m. N/A 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 22.0 ppb (17) N/A N/A 3.6 μg/m3 (15) 17.0
 
Jan. 13, 2019, 7 p.m. N/A 4.5 ppb (4) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 5 p.m. N/A 12.8 ppb (12) N/A 17.0 ppb (16) N/A N/A 8.0 ppb (6) N/A N/A 14.5 μg/m3 (55) 55.0
 
Jan. 13, 2019, 4 p.m. N/A 5.7 ppb (5) N/A 20.0 ppb (19) N/A N/A 5.0 ppb (4) N/A N/A 5.8 μg/m3 (24) 24.0
 
Jan. 13, 2019, 3 p.m. N/A 2.3 ppb (2) N/A 14.0 ppb (13) N/A N/A 12.0 ppb (9) N/A N/A 6.5 μg/m3 (27) 27.0
 
Jan. 13, 2019, 2 p.m. N/A 1.5 ppb (1) N/A 12.0 ppb (11) N/A N/A 14.0 ppb (11) N/A N/A 29.2 μg/m3 (87) 87.0
 
Jan. 13, 2019, 1 p.m. N/A 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 12.0 ppb (9) N/A N/A 7.3 μg/m3 (30) 30.0
 
Jan. 13, 2019, noon N/A 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 15.0 ppb (12) N/A N/A 3.6 μg/m3 (15) 15.0
 
Jan. 13, 2019, 11 a.m. N/A 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A 14.0 ppb (11) N/A N/A 6.4 μg/m3 (27) 27.0
 
Jan. 13, 2019, 10 a.m. N/A 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 15.0 ppb (12) N/A N/A 21.1 μg/m3 (69) 69.0
 
Jan. 13, 2019, 9 a.m. N/A 1.3 ppb (1) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) N/A N/A 7.6 μg/m3 (32) 32.0
 
Jan. 13, 2019, 8 a.m. N/A 0.9 ppb (1) N/A 11.0 ppb (10) N/A N/A 17.0 ppb (13) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 13, 2019, 7 a.m. N/A 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) N/A N/A 9.7 μg/m3 (40) 40.0
 
Jan. 13, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) N/A N/A 3.9 μg/m3 (16) 20.0
 
Jan. 13, 2019, 5 a.m. N/A 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
Jan. 13, 2019, 4 a.m. N/A 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 13, 2019, 3 a.m. N/A 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) N/A N/A 5.8 μg/m3 (24) 24.0
 
Jan. 13, 2019, 2 a.m. N/A 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) N/A N/A 4.5 μg/m3 (19) 19.0
 
Jan. 13, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) N/A N/A 5.4 μg/m3 (23) 23.0
 
Jan. 13, 2019, midnight N/A 0.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 16.0 ppb (12) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 12, 2019, 11 p.m. N/A -0.6 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) N/A N/A 3.8 μg/m3 (16) 21.0
 
Jan. 12, 2019, 10 p.m. N/A 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) N/A N/A 1.1 μg/m3 (5) 23.0
 
Jan. 12, 2019, 9 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
Jan. 12, 2019, 8 p.m. N/A 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) N/A N/A 1.1 μg/m3 (5) 22.0
 
Jan. 12, 2019, 7 p.m. N/A 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 1.0 μg/m3 (4) 22.0
 
Jan. 12, 2019, 6 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 1.7 μg/m3 (7) 22.0
 
Jan. 12, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.9 μg/m3 (12) 12.0
 
Jan. 12, 2019, 4 p.m. N/A 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 1.1 μg/m3 (5) 22.0
 
Jan. 12, 2019, 3 p.m. N/A 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A N/A 0.8 μg/m3 (3) 22.0
 
Jan. 12, 2019, 2 p.m. N/A 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 1.3 μg/m3 (5) 22.0
 
Jan. 12, 2019, 1 p.m. N/A 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A N/A 1.3 μg/m3 (5) 22.0
 
Jan. 12, 2019, noon N/A 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
Jan. 12, 2019, 11 a.m. N/A 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) N/A N/A 1.9 μg/m3 (8) 20.0
 
Jan. 12, 2019, 10 a.m. N/A 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, 9 a.m. N/A -0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) N/A N/A 8.4 μg/m3 (35) 35.0
 
Jan. 12, 2019, 8 a.m. N/A -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 10.6 μg/m3 (44) 44.0
 
Jan. 12, 2019, 7 a.m. N/A 1.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 1.3 μg/m3 (5) 22.0
 
Jan. 12, 2019, 6 a.m. N/A 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) N/A N/A 1.1 μg/m3 (5) 22.0
 
Jan. 12, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A N/A 1.7 μg/m3 (7) 22.0
 
Jan. 12, 2019, 4 a.m. N/A -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 1.3 μg/m3 (5) 22.0
 
Jan. 12, 2019, 3 a.m. N/A -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A N/A 1.2 μg/m3 (5) 20.0
 
Jan. 12, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.8 μg/m3 (3) 22.0
 
Jan. 12, 2019, 1 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 0.9 μg/m3 (4) 22.0
 
Jan. 12, 2019, midnight N/A 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A N/A 0.9 μg/m3 (4) 22.0
 
Jan. 11, 2019, 11 p.m. N/A -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A N/A 0.9 μg/m3 (4) 22.0
 
Jan. 11, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.6 μg/m3 (2) 22.0
 
Jan. 11, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
Jan. 11, 2019, 8 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.3 μg/m3 (1) 22.0
 
Jan. 11, 2019, 7 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
Jan. 11, 2019, 6 p.m. N/A 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.3 μg/m3 (1) 22.0
 
Jan. 11, 2019, 5 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 0.3 μg/m3 (1) 21.0
 
Jan. 11, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
Jan. 11, 2019, 3 p.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) N/A N/A 1.8 μg/m3 (8) 21.0
 
Jan. 11, 2019, 2 p.m. N/A 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
Jan. 11, 2019, 1 p.m. N/A 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
Jan. 11, 2019, noon N/A 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0