AQSQID: 000102701

Site Name: Williams Lake Columneetza School

Location: Williams Lake, CC

Reporting: True, Located: True

Current AQI: 57.0

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
March 20, 2019, 7 a.m. N/A -0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) N/A N/A 15.5 μg/m3 (57) 57.0
 
March 20, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) N/A N/A 23.2 μg/m3 (74) 74.0
 
March 20, 2019, 5 a.m. N/A -0.4 ppb (0) N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) N/A N/A 19.5 μg/m3 (66) 66.0
 
March 20, 2019, 4 a.m. N/A -0.7 ppb (0) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) N/A N/A 16.8 μg/m3 (60) 60.0
 
March 20, 2019, 3 a.m. N/A -0.6 ppb (0) N/A 14.0 ppb (13) N/A N/A 27.0 ppb (21) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 20, 2019, 2 a.m. N/A -0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 20, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) N/A N/A 2.2 μg/m3 (9) 41.0
 
March 20, 2019, midnight N/A -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.2 μg/m3 (5) 43.0
 
March 19, 2019, 11 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 57.0 ppb (44) N/A N/A 0.8 μg/m3 (3) 44.0
 
March 19, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 57.0 ppb (44) N/A N/A 0.8 μg/m3 (3) 44.0
 
March 19, 2019, 9 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 55.0 ppb (42) N/A N/A 1.2 μg/m3 (5) 42.0
 
March 19, 2019, 8 p.m. N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (37) N/A N/A 3.3 μg/m3 (14) 37.0
 
March 19, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) N/A N/A 5.2 μg/m3 (22) 34.0
 
March 19, 2019, 6 p.m. N/A 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A N/A 4.7 μg/m3 (20) 32.0
 
March 19, 2019, 5 p.m. N/A 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 19, 2019, 4 p.m. N/A 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 19, 2019, 3 p.m. N/A 18.7 ppb (17) N/A 23.0 ppb (21) N/A N/A 12.0 ppb (9) N/A N/A 15.7 μg/m3 (58) 58.0
 
March 19, 2019, 2 p.m. N/A 17.2 ppb (16) N/A 30.0 ppb (28) N/A N/A 4.0 ppb (3) N/A N/A 18.1 μg/m3 (63) 63.0
 
March 19, 2019, 1 p.m. N/A 5.5 ppb (5) N/A 21.0 ppb (19) N/A N/A 10.0 ppb (8) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 19, 2019, noon N/A -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 22.0 ppb (17) N/A N/A 14.2 μg/m3 (55) 55.0
 
March 19, 2019, 11 a.m. N/A 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 18.0 ppb (14) N/A N/A 16.3 μg/m3 (59) 59.0
 
March 19, 2019, 10 a.m. N/A 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) N/A N/A 15.2 μg/m3 (57) 57.0
 
March 19, 2019, 9 a.m. N/A 1.7 ppb (2) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) N/A N/A 17.3 μg/m3 (61) 61.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.8 μg/m3 (60) 60.0
 
March 19, 2019, 7 a.m. N/A -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) N/A N/A 16.1 μg/m3 (59) 59.0
 
March 19, 2019, 6 a.m. N/A -0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) N/A N/A 18.5 μg/m3 (64) 64.0
 
March 19, 2019, 5 a.m. N/A -0.6 ppb (0) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) N/A N/A 18.5 μg/m3 (64) 64.0
 
March 19, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 17.0 ppb (16) N/A N/A 20.0 ppb (15) N/A N/A 44.1 μg/m3 (122) 122.0
 
March 19, 2019, 3 a.m. N/A 0.9 ppb (1) N/A 23.0 ppb (21) N/A N/A 19.0 ppb (15) N/A N/A 49.0 μg/m3 (134) 134.0
 
March 19, 2019, 2 a.m. N/A -0.1 ppb (0) N/A 15.0 ppb (14) N/A N/A 27.0 ppb (21) N/A N/A 18.6 μg/m3 (64) 64.0
 
March 19, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 10.0 ppb (9) N/A N/A 37.0 ppb (28) N/A N/A 17.1 μg/m3 (61) 61.0
 
March 19, 2019, midnight N/A 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 49.0 ppb (38) N/A N/A 9.7 μg/m3 (40) 40.0
 
March 18, 2019, 11 p.m. N/A 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (37) N/A N/A 4.8 μg/m3 (20) 37.0
 
March 18, 2019, 10 p.m. N/A 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) N/A N/A 3.5 μg/m3 (15) 37.0
 
March 18, 2019, 9 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
March 18, 2019, 8 p.m. N/A 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) N/A N/A 4.3 μg/m3 (18) 32.0
 
March 18, 2019, 7 p.m. N/A 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A N/A 5.1 μg/m3 (21) 31.0
 
March 18, 2019, 6 p.m. N/A 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 18, 2019, 5 p.m. N/A 4.4 ppb (4) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) N/A N/A 8.5 μg/m3 (35) 35.0
 
March 18, 2019, 4 p.m. N/A 3.3 ppb (3) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 18, 2019, 3 p.m. N/A 4.9 ppb (5) N/A 14.0 ppb (13) N/A N/A 17.0 ppb (13) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 18, 2019, 2 p.m. N/A 5.8 ppb (5) N/A 20.0 ppb (19) N/A N/A 10.0 ppb (8) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 18, 2019, 1 p.m. N/A 4.0 ppb (4) N/A 21.0 ppb (19) N/A N/A 8.0 ppb (6) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 18, 2019, noon N/A 1.5 ppb (1) N/A 15.0 ppb (14) N/A N/A 13.0 ppb (10) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 18, 2019, 11 a.m. N/A 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) N/A N/A 10.6 μg/m3 (44) 44.0
 
March 18, 2019, 10 a.m. N/A -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) N/A N/A 12.1 μg/m3 (50) 50.0
 
March 18, 2019, 9 a.m. N/A 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 18, 2019, 8 a.m. N/A -0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.6 μg/m3 (51) 51.0
 
March 18, 2019, 6 a.m. N/A 0.3 ppb (0) N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 18, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) N/A N/A 16.3 μg/m3 (59) 59.0
 
March 18, 2019, 4 a.m. N/A 0.3 ppb (0) N/A 14.0 ppb (13) N/A N/A 22.0 ppb (17) N/A N/A 18.5 μg/m3 (64) 64.0
 
March 18, 2019, 3 a.m. N/A 0.3 ppb (0) N/A 18.0 ppb (17) N/A N/A 19.0 ppb (15) N/A N/A 12.8 μg/m3 (52) 52.0
 
March 18, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) N/A N/A 5.5 μg/m3 (23) 23.0
 
March 18, 2019, 1 a.m. N/A -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) N/A N/A 4.8 μg/m3 (20) 32.0
 
March 18, 2019, midnight N/A -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
March 17, 2019, 11 p.m. N/A -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 2.1 μg/m3 (9) 38.0
 
March 17, 2019, 10 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 2.8 μg/m3 (12) 37.0
 
March 17, 2019, 9 p.m. N/A 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 3.4 μg/m3 (14) 35.0
 
March 17, 2019, 8 p.m. N/A 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) N/A N/A 4.9 μg/m3 (20) 33.0
 
March 17, 2019, 7 p.m. N/A 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A N/A 4.1 μg/m3 (17) 32.0
 
March 17, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 5.5 μg/m3 (23) 28.0
 
March 17, 2019, 5 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) N/A N/A 6.1 μg/m3 (25) 27.0
 
March 17, 2019, 4 p.m. N/A 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) N/A N/A 7.3 μg/m3 (30) 30.0
 
March 17, 2019, 3 p.m. N/A 4.3 ppb (4) N/A 15.0 ppb (14) N/A N/A 16.0 ppb (12) N/A N/A 13.9 μg/m3 (54) 54.0
 
March 17, 2019, 2 p.m. N/A 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) N/A N/A 9.7 μg/m3 (40) 40.0
 
March 17, 2019, 1 p.m. N/A 0.9 ppb (1) N/A 17.0 ppb (16) N/A N/A 13.0 ppb (10) N/A N/A 12.2 μg/m3 (50) 50.0
 
March 17, 2019, noon N/A 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 17, 2019, 11 a.m. N/A 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 21.0 ppb (16) N/A N/A 11.6 μg/m3 (48) 48.0
 
March 17, 2019, 10 a.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 13.8 μg/m3 (54) 54.0
 
March 17, 2019, 9 a.m. N/A 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 19.0 ppb (15) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 17, 2019, 8 a.m. N/A -0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) N/A N/A 14.3 μg/m3 (55) 55.0
 
March 17, 2019, 7 a.m. N/A 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 18.0 ppb (14) N/A N/A 18.8 μg/m3 (64) 64.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.7 μg/m3 (54) 54.0
 
March 17, 2019, 5 a.m. N/A 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 4 a.m. N/A -0.1 ppb (0) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) N/A N/A 15.4 μg/m3 (57) 57.0
 
March 17, 2019, 3 a.m. N/A 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) N/A N/A 19.8 μg/m3 (67) 67.0
 
March 17, 2019, 2 a.m. N/A -0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) N/A N/A 13.7 μg/m3 (54) 54.0
 
March 17, 2019, 1 a.m. N/A 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 36.0 ppb (28) N/A N/A 14.6 μg/m3 (56) 56.0
 
March 17, 2019, midnight N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) N/A N/A 3.4 μg/m3 (14) 37.0
 
March 16, 2019, 11 p.m. N/A 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 2.4 μg/m3 (10) 38.0
 
March 16, 2019, 10 p.m. N/A 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 38.0
 
March 16, 2019, 9 p.m. N/A 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 1.5 μg/m3 (6) 37.0
 
March 16, 2019, 8 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 2.1 μg/m3 (9) 36.0
 
March 16, 2019, 7 p.m. N/A 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 16, 2019, 6 p.m. N/A 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 16, 2019, 5 p.m. N/A 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A N/A 11.2 μg/m3 (47) 47.0
 
March 16, 2019, 4 p.m. N/A 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 15.6 μg/m3 (58) 58.0
 
March 16, 2019, 3 p.m. N/A 4.7 ppb (4) N/A 18.0 ppb (17) N/A N/A 14.0 ppb (11) N/A N/A 14.2 μg/m3 (55) 55.0
 
March 16, 2019, 2 p.m. N/A 1.0 ppb (1) N/A 14.0 ppb (13) N/A N/A 16.0 ppb (12) N/A N/A 10.1 μg/m3 (42) 42.0
 
March 16, 2019, 1 p.m. N/A 0.4 ppb (0) N/A 15.0 ppb (14) N/A N/A 15.0 ppb (12) N/A N/A 10.1 μg/m3 (42) 42.0
 
March 16, 2019, noon N/A 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 16, 2019, 11 a.m. N/A -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) N/A N/A 10.1 μg/m3 (42) 42.0
 
March 16, 2019, 10 a.m. N/A 0.0 ppb (0) N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) N/A N/A 11.2 μg/m3 (47) 47.0
 
March 16, 2019, 9 a.m. N/A -0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 16, 2019, 8 a.m. N/A 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 24.0 ppb (18) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 16, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 16, 2019, 6 a.m. N/A -0.2 ppb (0) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) N/A N/A 18.8 μg/m3 (64) 64.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 23.8 μg/m3 (75) 75.0
 
March 16, 2019, 4 a.m. N/A 0.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 16, 2019, 3 a.m. N/A 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) N/A N/A 6.8 μg/m3 (28) 28.0
 
March 16, 2019, 2 a.m. N/A -0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A 33.0 ppb (25) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 16, 2019, 1 a.m. N/A 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) N/A N/A 6.4 μg/m3 (27) 32.0
 
March 16, 2019, midnight N/A -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 2.0 μg/m3 (8) 37.0
 
March 15, 2019, 11 p.m. N/A 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) N/A N/A 2.9 μg/m3 (12) 35.0
 
March 15, 2019, 10 p.m. N/A 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A N/A 2.7 μg/m3 (11) 35.0
 
March 15, 2019, 9 p.m. N/A 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 3.0 μg/m3 (12) 36.0
 
March 15, 2019, 8 p.m. N/A 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 2.2 μg/m3 (9) 36.0
 
March 15, 2019, 7 p.m. N/A 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 4.6 μg/m3 (19) 34.0
 
March 15, 2019, 6 p.m. N/A 4.5 ppb (4) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 15, 2019, 5 p.m. N/A 9.0 ppb (8) N/A 14.0 ppb (13) N/A N/A 24.0 ppb (18) N/A N/A 31.6 μg/m3 (92) 92.0
 
March 15, 2019, 4 p.m. N/A 15.1 ppb (14) N/A 21.0 ppb (19) N/A N/A 15.0 ppb (12) N/A N/A 46.1 μg/m3 (126) 126.0
 
March 15, 2019, 3 p.m. N/A 21.0 ppb (19) N/A 26.0 ppb (24) N/A N/A 6.0 ppb (5) N/A N/A 23.3 μg/m3 (74) 74.0
 
March 15, 2019, 2 p.m. N/A 13.4 ppb (12) N/A 25.0 ppb (23) N/A N/A 3.0 ppb (2) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 15, 2019, 1 p.m. N/A 13.0 ppb (12) N/A 28.0 ppb (26) N/A N/A 1.0 ppb (1) N/A N/A 15.9 μg/m3 (58) 58.0
 
March 15, 2019, noon N/A 4.7 ppb (4) N/A 21.0 ppb (19) N/A N/A 5.0 ppb (4) N/A N/A 13.3 μg/m3 (53) 53.0
 
March 15, 2019, 11 a.m. N/A -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) N/A N/A 9.9 μg/m3 (41) 41.0
 
March 15, 2019, 10 a.m. N/A 1.4 ppb (1) N/A 18.0 ppb (17) N/A N/A 12.0 ppb (9) N/A N/A 15.9 μg/m3 (58) 58.0
 
March 15, 2019, 9 a.m. N/A -0.1 ppb (0) N/A 16.0 ppb (15) N/A N/A 13.0 ppb (10) N/A N/A 17.8 μg/m3 (62) 62.0
 
March 15, 2019, 8 a.m. N/A 0.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) N/A N/A 13.3 μg/m3 (53) 53.0
 
March 15, 2019, 7 a.m. N/A -0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) N/A N/A 18.4 μg/m3 (64) 64.0
 
March 15, 2019, 6 a.m. N/A 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) N/A N/A 17.5 μg/m3 (62) 62.0
 
March 15, 2019, 5 a.m. N/A 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 6.4 μg/m3 (27) 27.0
 
March 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.3 μg/m3 (35) 35.0
 
March 15, 2019, 3 a.m. N/A 0.4 ppb (0) N/A 15.0 ppb (14) N/A N/A 25.0 ppb (19) N/A N/A 12.1 μg/m3 (50) 50.0
 
March 15, 2019, 2 a.m. N/A -0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 4.8 μg/m3 (20) 28.0
 
March 15, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 2.1 μg/m3 (9) 33.0
 
March 15, 2019, midnight N/A -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
March 14, 2019, 11 p.m. N/A 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) N/A N/A 2.4 μg/m3 (10) 33.0
 
March 14, 2019, 10 p.m. N/A 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 1.8 μg/m3 (8) 35.0
 
March 14, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
March 14, 2019, 8 p.m. N/A 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 1.5 μg/m3 (6) 34.0
 
March 14, 2019, 7 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 43.0 ppb (33) N/A N/A 1.6 μg/m3 (7) 33.0
 
March 14, 2019, 6 p.m. N/A 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A 42.0 ppb (32) N/A N/A 1.7 μg/m3 (7) 32.0
 
March 14, 2019, 5 p.m. N/A 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 1.6 μg/m3 (7) 32.0
 
March 14, 2019, 4 p.m. N/A 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 1.4 μg/m3 (6) 32.0
 
March 14, 2019, 3 p.m. N/A 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 5.6 μg/m3 (23) 25.0
 
March 14, 2019, 2 p.m. N/A 0.9 ppb (1) N/A 17.0 ppb (16) N/A N/A 22.0 ppb (17) N/A N/A 12.8 μg/m3 (52) 52.0
 
March 14, 2019, 1 p.m. N/A 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, noon N/A 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) N/A N/A 5.6 μg/m3 (23) 24.0
 
March 14, 2019, 11 a.m. N/A -0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) N/A N/A 5.1 μg/m3 (21) 23.0
 
March 14, 2019, 10 a.m. N/A 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 30.0 ppb (23) N/A N/A 6.2 μg/m3 (26) 26.0
 
March 14, 2019, 9 a.m. N/A -0.7 ppb (0) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) N/A N/A 7.3 μg/m3 (30) 30.0
 
March 14, 2019, 8 a.m. N/A -0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 7.1 μg/m3 (30) 30.0
 
March 14, 2019, 7 a.m. N/A -0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 14, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) N/A N/A 11.6 μg/m3 (48) 48.0
 
March 14, 2019, 5 a.m. N/A -0.2 ppb (0) N/A 12.0 ppb (11) N/A N/A 24.0 ppb (18) N/A N/A 13.3 μg/m3 (53) 53.0
 
March 14, 2019, 4 a.m. N/A 0.5 ppb (0) N/A 18.0 ppb (17) N/A N/A 20.0 ppb (15) N/A N/A 12.3 μg/m3 (51) 51.0
 
March 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.7 μg/m3 (49) 49.0
 
March 14, 2019, 2 a.m. N/A 2.9 ppb (3) N/A 22.0 ppb (20) N/A N/A 17.0 ppb (13) N/A N/A 28.8 μg/m3 (86) 86.0
 
March 14, 2019, 1 a.m. N/A 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 7.8 μg/m3 (32) 32.0
 
March 14, 2019, midnight N/A 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) N/A N/A 4.2 μg/m3 (18) 30.0
 
March 13, 2019, 11 p.m. N/A -0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 45.0 ppb (35) N/A N/A 1.5 μg/m3 (6) 35.0
 
March 13, 2019, 10 p.m. N/A 0.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 1.4 μg/m3 (6) 34.0
 
March 13, 2019, 9 p.m. N/A 0.1 ppb (0) N/A -1.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 1.1 μg/m3 (5) 34.0
 
March 13, 2019, 8 p.m. N/A 0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 43.0 ppb (33) N/A N/A 1.6 μg/m3 (7) 33.0
 
March 13, 2019, 7 p.m. N/A 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) N/A N/A 6.4 μg/m3 (27) 28.0
 
March 13, 2019, 6 p.m. N/A 4.4 ppb (4) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 13, 2019, 5 p.m. N/A 9.8 ppb (9) N/A 13.0 ppb (12) N/A N/A 23.0 ppb (18) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 13, 2019, 4 p.m. N/A 14.0 ppb (13) N/A 17.0 ppb (16) N/A N/A 17.0 ppb (13) N/A N/A 13.9 μg/m3 (54) 54.0
 
March 13, 2019, 3 p.m. N/A 20.9 ppb (19) N/A 28.0 ppb (26) N/A N/A 7.0 ppb (5) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 13, 2019, 2 p.m. N/A 23.7 ppb (22) N/A 32.0 ppb (30) N/A N/A 3.0 ppb (2) N/A N/A 14.2 μg/m3 (55) 55.0
 
March 13, 2019, 1 p.m. N/A 18.5 ppb (17) N/A 33.0 ppb (31) N/A N/A 1.0 ppb (1) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 13, 2019, noon N/A 13.0 ppb (12) N/A 33.0 ppb (31) N/A N/A 2.0 ppb (2) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 13, 2019, 11 a.m. N/A 13.6 ppb (13) N/A 35.0 ppb (32) N/A N/A 1.0 ppb (1) N/A N/A 14.8 μg/m3 (56) 56.0
 
March 13, 2019, 10 a.m. N/A 12.6 ppb (12) N/A 32.0 ppb (30) N/A N/A 1.0 ppb (1) N/A N/A 17.7 μg/m3 (62) 62.0
 
March 13, 2019, 9 a.m. N/A 11.4 ppb (11) N/A 35.0 ppb (32) N/A N/A 1.0 ppb (1) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 13, 2019, 8 a.m. N/A 2.1 ppb (2) N/A 19.0 ppb (18) N/A N/A 13.0 ppb (10) N/A N/A 20.3 μg/m3 (68) 68.0