AQSQID: 000101701

Site Name: Quesnel Senior Secondary

Location: Quesnel, CC

Reporting: True, Located: True

Current AQI: 109.0

Quesnel CC, CA: 52.9822, -122.4922

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 5 a.m. N/A 19.7 ppb (18) N/A 27.0 ppb (25) N/A 2.0 ppb (3) 2.0 ppb (2) N/A N/A 35.0 μg/m3 (99) 99.0
 
March 22, 2019, 4 a.m. N/A 21.0 ppb (19) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 39.2 μg/m3 (109) 109.0
 
March 22, 2019, 3 a.m. N/A 32.9 ppb (30) N/A 35.0 ppb (32) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 45.6 μg/m3 (125) 125.0
 
March 22, 2019, 2 a.m. N/A 20.3 ppb (19) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 50.9 μg/m3 (138) 138.0
 
March 22, 2019, 1 a.m. N/A 4.8 ppb (4) N/A 29.0 ppb (27) N/A 1.0 ppb (1) 13.0 ppb (10) N/A N/A 29.3 μg/m3 (87) 87.0
 
March 22, 2019, midnight N/A 3.3 ppb (3) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 15.1 μg/m3 (57) 57.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.7 μg/m3 (32) 32.0
 
March 21, 2019, 10 p.m. N/A 1.1 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 6.1 μg/m3 (25) 25.0
 
March 21, 2019, 9 p.m. N/A 2.7 ppb (3) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 21, 2019, 8 p.m. N/A 4.1 ppb (4) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 12.4 μg/m3 (51) 51.0
 
March 21, 2019, 7 p.m. N/A 4.6 ppb (4) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 23.0 ppb (18) N/A N/A 17.5 μg/m3 (62) 62.0
 
March 21, 2019, 6 p.m. N/A 4.4 ppb (4) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 22.0 μg/m3 (71) 71.0
 
March 21, 2019, 5 p.m. N/A 13.0 ppb (12) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 16.0 ppb (12) N/A N/A 37.3 μg/m3 (104) 104.0
 
March 21, 2019, 4 p.m. N/A 23.9 ppb (22) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 41.7 μg/m3 (116) 116.0
 
March 21, 2019, 3 p.m. N/A 20.9 ppb (19) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 24.8 μg/m3 (77) 77.0
 
March 21, 2019, 2 p.m. N/A 42.4 ppb (39) N/A 22.0 ppb (20) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 24.1 μg/m3 (76) 76.0
 
March 21, 2019, 1 p.m. N/A 22.6 ppb (21) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 21.0 μg/m3 (69) 69.0
 
March 21, 2019, noon N/A 6.2 ppb (6) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 18.4 μg/m3 (64) 64.0
 
March 21, 2019, 11 a.m. N/A 8.4 ppb (8) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 20.2 μg/m3 (67) 67.0
 
March 21, 2019, 10 a.m. N/A 10.8 ppb (10) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 20.9 μg/m3 (69) 69.0
 
March 21, 2019, 9 a.m. N/A 15.3 ppb (14) N/A 28.0 ppb (26) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 24.6 μg/m3 (77) 77.0
 
March 21, 2019, 8 a.m. N/A 9.9 ppb (9) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 29.9 μg/m3 (88) 88.0
 
March 21, 2019, 7 a.m. N/A 11.0 ppb (10) N/A 29.0 ppb (27) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 32.3 μg/m3 (93) 93.0
 
March 21, 2019, 6 a.m. N/A 17.4 ppb (16) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 44.5 μg/m3 (122) 122.0
 
March 21, 2019, 5 a.m. N/A 23.4 ppb (22) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 70.7 μg/m3 (158) 158.0
 
March 21, 2019, 4 a.m. N/A 30.8 ppb (29) N/A 40.0 ppb (37) N/A 2.0 ppb (3) 2.0 ppb (2) N/A N/A 66.5 μg/m3 (156) 156.0
 
March 21, 2019, 3 a.m. N/A 38.8 ppb (36) N/A 42.0 ppb (39) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 56.6 μg/m3 (151) 151.0
 
March 21, 2019, 2 a.m. N/A 15.8 ppb (15) N/A 43.0 ppb (40) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 47.6 μg/m3 (130) 130.0
 
March 21, 2019, 1 a.m. N/A 10.2 ppb (9) N/A 40.0 ppb (37) N/A 2.0 ppb (3) 11.0 ppb (8) N/A N/A 42.1 μg/m3 (116) 116.0
 
March 21, 2019, midnight N/A 5.9 ppb (5) N/A 28.0 ppb (26) N/A 3.0 ppb (4) 26.0 ppb (20) N/A N/A 24.6 μg/m3 (77) 77.0
 
March 20, 2019, 11 p.m. N/A 1.8 ppb (2) N/A 12.0 ppb (11) N/A 2.0 ppb (3) 36.0 ppb (28) N/A N/A 17.1 μg/m3 (61) 61.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 32.5 μg/m3 (94) 94.0
 
March 20, 2019, 9 p.m. N/A 3.8 ppb (4) N/A 14.0 ppb (13) N/A 2.0 ppb (3) 33.0 ppb (25) N/A N/A 23.0 μg/m3 (73) 73.0
 
March 20, 2019, 8 p.m. N/A 3.2 ppb (3) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 22.6 μg/m3 (73) 73.0
 
March 20, 2019, 7 p.m. N/A 5.0 ppb (5) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 25.0 μg/m3 (78) 78.0
 
March 20, 2019, 6 p.m. N/A 12.1 ppb (11) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 37.6 μg/m3 (105) 105.0
 
March 20, 2019, 5 p.m. N/A 25.8 ppb (24) N/A 27.0 ppb (25) N/A 1.0 ppb (1) 14.0 ppb (11) N/A N/A 44.6 μg/m3 (123) 123.0
 
March 20, 2019, 4 p.m. N/A 46.4 ppb (43) N/A 29.0 ppb (27) N/A 2.0 ppb (3) 7.0 ppb (5) N/A N/A 36.8 μg/m3 (103) 103.0
 
March 20, 2019, 3 p.m. N/A 49.9 ppb (46) N/A 26.0 ppb (24) N/A 2.0 ppb (3) 3.0 ppb (2) N/A N/A 28.7 μg/m3 (86) 86.0
 
March 20, 2019, 2 p.m. N/A 39.1 ppb (36) N/A 24.0 ppb (22) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 25.3 μg/m3 (78) 78.0
 
March 20, 2019, 1 p.m. N/A 35.9 ppb (33) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 26.7 μg/m3 (81) 81.0
 
March 20, 2019, noon N/A 11.4 ppb (11) N/A 24.0 ppb (22) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 24.7 μg/m3 (77) 77.0
 
March 20, 2019, 11 a.m. N/A 7.9 ppb (7) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 26.4 μg/m3 (81) 81.0
 
March 20, 2019, 10 a.m. N/A 5.1 ppb (5) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 27.9 μg/m3 (84) 84.0
 
March 20, 2019, 9 a.m. N/A 7.4 ppb (7) N/A 27.0 ppb (25) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 30.8 μg/m3 (90) 90.0
 
March 20, 2019, 8 a.m. N/A 5.9 ppb (5) N/A 29.0 ppb (27) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 31.3 μg/m3 (91) 91.0
 
March 20, 2019, 7 a.m. N/A 5.9 ppb (5) N/A 29.0 ppb (27) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 31.1 μg/m3 (91) 91.0
 
March 20, 2019, 6 a.m. N/A 9.0 ppb (8) N/A 33.0 ppb (31) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 39.7 μg/m3 (110) 110.0
 
March 20, 2019, 5 a.m. N/A 37.5 ppb (35) N/A 38.0 ppb (35) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 49.3 μg/m3 (134) 134.0
 
March 20, 2019, 4 a.m. N/A 40.5 ppb (38) N/A 42.0 ppb (39) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 51.3 μg/m3 (140) 140.0
 
March 20, 2019, 3 a.m. N/A 25.3 ppb (23) N/A 42.0 ppb (39) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 55.0 μg/m3 (149) 149.0
 
March 20, 2019, 2 a.m. N/A 18.3 ppb (17) N/A 44.0 ppb (41) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 50.9 μg/m3 (138) 138.0
 
March 20, 2019, 1 a.m. N/A 8.6 ppb (8) N/A 39.0 ppb (36) N/A 1.0 ppb (1) 13.0 ppb (10) N/A N/A 46.8 μg/m3 (128) 128.0
 
March 20, 2019, midnight N/A 2.8 ppb (3) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 22.6 μg/m3 (73) 73.0
 
March 19, 2019, 11 p.m. N/A 4.1 ppb (4) N/A 20.0 ppb (19) N/A 3.0 ppb (4) 33.0 ppb (25) N/A N/A 25.6 μg/m3 (79) 79.0
 
March 19, 2019, 10 p.m. N/A 4.7 ppb (4) N/A 17.0 ppb (16) N/A 2.0 ppb (3) 31.0 ppb (24) N/A N/A 20.6 μg/m3 (68) 68.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 26.8 μg/m3 (81) 81.0
 
March 19, 2019, 8 p.m. N/A 3.6 ppb (3) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 19, 2019, 7 p.m. N/A 5.5 ppb (5) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 21.8 μg/m3 (71) 71.0
 
March 19, 2019, 6 p.m. N/A 9.3 ppb (9) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 33.0 μg/m3 (95) 95.0
 
March 19, 2019, 5 p.m. N/A 23.3 ppb (22) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 13.0 ppb (10) N/A N/A 68.3 μg/m3 (157) 157.0
 
March 19, 2019, 4 p.m. N/A 35.1 ppb (32) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 50.5 μg/m3 (138) 138.0
 
March 19, 2019, 3 p.m. N/A 36.6 ppb (34) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 31.8 μg/m3 (92) 92.0
 
March 19, 2019, 2 p.m. N/A 45.3 ppb (42) N/A 24.0 ppb (22) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 23.5 μg/m3 (74) 74.0
 
March 19, 2019, 1 p.m. N/A 21.6 ppb (20) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 19.7 μg/m3 (66) 66.0
 
March 19, 2019, noon N/A 13.3 ppb (12) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 20.2 μg/m3 (67) 67.0
 
March 19, 2019, 11 a.m. N/A 10.0 ppb (9) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 23.5 μg/m3 (74) 74.0
 
March 19, 2019, 10 a.m. N/A 0.7 ppb (1) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 20.6 μg/m3 (68) 68.0
 
March 19, 2019, 9 a.m. N/A 1.3 ppb (1) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 22.7 μg/m3 (73) 73.0
 
March 19, 2019, 8 a.m. N/A 0.7 ppb (1) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 27.6 μg/m3 (83) 83.0
 
March 19, 2019, 7 a.m. N/A 4.5 ppb (4) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 29.8 μg/m3 (88) 88.0
 
March 19, 2019, 6 a.m. N/A 14.1 ppb (13) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 38.7 μg/m3 (108) 108.0
 
March 19, 2019, 5 a.m. N/A 23.6 ppb (22) N/A 34.0 ppb (31) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 41.7 μg/m3 (116) 116.0
 
March 19, 2019, 4 a.m. N/A 27.9 ppb (26) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 43.5 μg/m3 (120) 120.0
 
March 19, 2019, 3 a.m. N/A 18.2 ppb (17) N/A 36.0 ppb (33) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 41.9 μg/m3 (116) 116.0
 
March 19, 2019, 2 a.m. N/A 19.2 ppb (18) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 28.6 μg/m3 (85) 85.0
 
March 19, 2019, 1 a.m. N/A 6.8 ppb (6) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 15.0 ppb (12) N/A N/A 28.0 μg/m3 (84) 84.0
 
March 19, 2019, midnight N/A 1.2 ppb (1) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 18.3 μg/m3 (63) 63.0
 
March 18, 2019, 11 p.m. N/A 2.6 ppb (2) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 14.8 μg/m3 (56) 56.0
 
March 18, 2019, 10 p.m. N/A 3.4 ppb (3) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 14.3 μg/m3 (55) 55.0
 
March 18, 2019, 9 p.m. N/A 2.4 ppb (2) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 7 p.m. N/A 2.2 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 13.5 μg/m3 (53) 53.0
 
March 18, 2019, 6 p.m. N/A 3.5 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 16.3 μg/m3 (59) 59.0
 
March 18, 2019, 5 p.m. N/A 9.0 ppb (8) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 16.0 ppb (12) N/A N/A 45.8 μg/m3 (126) 126.0
 
March 18, 2019, 4 p.m. N/A 21.3 ppb (20) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 51.1 μg/m3 (139) 139.0
 
March 18, 2019, 3 p.m. N/A 40.8 ppb (38) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 26.6 μg/m3 (81) 81.0
 
March 18, 2019, 2 p.m. N/A 26.1 ppb (24) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 22.2 μg/m3 (72) 72.0
 
March 18, 2019, 1 p.m. N/A 20.6 ppb (19) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 21.2 μg/m3 (70) 70.0
 
March 18, 2019, noon N/A 14.8 ppb (14) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 19.6 μg/m3 (66) 66.0
 
March 18, 2019, 11 a.m. N/A 4.7 ppb (4) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 17.3 μg/m3 (61) 61.0
 
March 18, 2019, 10 a.m. N/A 4.4 ppb (4) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 18.6 μg/m3 (64) 64.0
 
March 18, 2019, 9 a.m. N/A 2.0 ppb (2) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 18.7 μg/m3 (64) 64.0
 
March 18, 2019, 8 a.m. N/A 0.8 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 19.4 μg/m3 (66) 66.0
 
March 18, 2019, 7 a.m. N/A 7.0 ppb (6) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 19.8 μg/m3 (67) 67.0
 
March 18, 2019, 6 a.m. N/A 28.1 ppb (26) N/A 32.0 ppb (30) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 19.6 μg/m3 (66) 66.0
 
March 18, 2019, 5 a.m. N/A 21.9 ppb (20) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 18.6 μg/m3 (64) 64.0
 
March 18, 2019, 4 a.m. N/A 16.7 ppb (15) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 21.8 μg/m3 (71) 71.0
 
March 18, 2019, 3 a.m. N/A 16.4 ppb (15) N/A 33.0 ppb (31) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 22.7 μg/m3 (73) 73.0
 
March 18, 2019, 2 a.m. N/A 12.2 ppb (11) N/A 34.0 ppb (31) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 19.4 μg/m3 (66) 66.0
 
March 18, 2019, 1 a.m. N/A 10.2 ppb (9) N/A 27.0 ppb (25) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 18.8 μg/m3 (64) 64.0
 
March 18, 2019, midnight N/A 1.3 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 26.0 ppb (20) N/A N/A 6.4 μg/m3 (27) 27.0
 
March 17, 2019, 11 p.m. N/A 1.3 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 6.7 μg/m3 (28) 28.0
 
March 17, 2019, 10 p.m. N/A 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 6.1 μg/m3 (25) 25.0
 
March 17, 2019, 9 p.m. N/A 0.8 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 4.7 μg/m3 (20) 22.0
 
March 17, 2019, 8 p.m. N/A 1.9 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 26.0 ppb (20) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.4 μg/m3 (59) 59.0
 
March 17, 2019, 6 p.m. N/A 2.6 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 21.9 μg/m3 (71) 71.0
 
March 17, 2019, 5 p.m. N/A 9.8 ppb (9) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 15.0 ppb (12) N/A N/A 36.4 μg/m3 (102) 102.0
 
March 17, 2019, 4 p.m. N/A 9.1 ppb (8) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 40.8 μg/m3 (113) 113.0
 
March 17, 2019, 3 p.m. N/A 16.6 ppb (15) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 25.8 μg/m3 (79) 79.0
 
March 17, 2019, 2 p.m. N/A 18.7 ppb (17) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 22.5 μg/m3 (72) 72.0
 
March 17, 2019, 1 p.m. N/A 15.2 ppb (14) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 21.6 μg/m3 (70) 70.0
 
March 17, 2019, noon N/A 3.0 ppb (3) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 22.6 μg/m3 (73) 73.0
 
March 17, 2019, 11 a.m. N/A 5.2 ppb (5) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 21.3 μg/m3 (70) 70.0
 
March 17, 2019, 10 a.m. N/A 0.8 ppb (1) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 21.0 μg/m3 (69) 69.0
 
March 17, 2019, 9 a.m. N/A 0.6 ppb (1) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 6.0 ppb (5) N/A N/A 20.0 μg/m3 (67) 67.0
 
March 17, 2019, 8 a.m. N/A 4.1 ppb (4) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 19.7 μg/m3 (66) 66.0
 
March 17, 2019, 7 a.m. N/A 11.2 ppb (10) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 19.5 μg/m3 (66) 66.0
 
March 17, 2019, 6 a.m. N/A 13.3 ppb (12) N/A 28.0 ppb (26) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 21.1 μg/m3 (69) 69.0
 
March 17, 2019, 5 a.m. N/A 23.8 ppb (22) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 24.7 μg/m3 (77) 77.0
 
March 17, 2019, 4 a.m. N/A 20.2 ppb (19) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 24.4 μg/m3 (76) 76.0
 
March 17, 2019, 3 a.m. N/A 32.1 ppb (30) N/A 34.0 ppb (31) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 28.7 μg/m3 (86) 86.0
 
March 17, 2019, 2 a.m. N/A 16.8 ppb (16) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 24.9 μg/m3 (77) 77.0
 
March 17, 2019, 1 a.m. N/A 10.7 ppb (10) N/A 39.0 ppb (36) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, midnight N/A 4.0 ppb (4) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 19.0 ppb (15) N/A N/A 6.3 μg/m3 (26) 26.0
 
March 16, 2019, 11 p.m. N/A 1.9 ppb (2) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 4.9 μg/m3 (20) 20.0
 
March 16, 2019, 10 p.m. N/A 0.8 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 2.3 μg/m3 (10) 22.0
 
March 16, 2019, 9 p.m. N/A 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) N/A N/A 3.0 μg/m3 (12) 23.0
 
March 16, 2019, 8 p.m. N/A 1.2 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 2.3 μg/m3 (10) 22.0
 
March 16, 2019, 7 p.m. N/A 1.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 26.0 ppb (20) N/A N/A 3.3 μg/m3 (14) 20.0
 
March 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.7 μg/m3 (32) 32.0
 
March 16, 2019, 5 p.m. N/A 3.8 ppb (4) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 20.0 ppb (15) N/A N/A 14.7 μg/m3 (56) 56.0
 
March 16, 2019, 4 p.m. N/A 5.5 ppb (5) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 13.0 ppb (10) N/A N/A 22.0 μg/m3 (71) 71.0
 
March 16, 2019, 3 p.m. N/A 5.9 ppb (5) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 25.5 μg/m3 (79) 79.0
 
March 16, 2019, 2 p.m. N/A 2.6 ppb (2) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 28.8 μg/m3 (86) 86.0
 
March 16, 2019, 1 p.m. N/A 2.8 ppb (3) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 15.2 μg/m3 (57) 57.0
 
March 16, 2019, noon N/A 1.4 ppb (1) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 15.8 μg/m3 (58) 58.0
 
March 16, 2019, 11 a.m. N/A 1.0 ppb (1) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 6.0 ppb (5) N/A N/A 15.2 μg/m3 (57) 57.0
 
March 16, 2019, 10 a.m. N/A 0.6 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 14.4 μg/m3 (55) 55.0
 
March 16, 2019, 9 a.m. N/A 2.6 ppb (2) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 16.2 μg/m3 (59) 59.0
 
March 16, 2019, 8 a.m. N/A 0.5 ppb (0) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 6.0 ppb (5) N/A N/A 13.5 μg/m3 (53) 53.0
 
March 16, 2019, 7 a.m. N/A 1.7 ppb (2) N/A 24.0 ppb (22) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 16, 2019, 6 a.m. N/A 5.0 ppb (5) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 16, 2019, 5 a.m. N/A 10.7 ppb (10) N/A 33.0 ppb (31) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 16, 2019, 4 a.m. N/A 15.7 ppb (15) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 16, 2019, 3 a.m. N/A 11.7 ppb (11) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 16, 2019, 2 a.m. N/A 3.4 ppb (3) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 12.0 ppb (9) N/A N/A 4.6 μg/m3 (19) 24.0
 
March 16, 2019, 1 a.m. N/A 0.3 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
March 16, 2019, midnight N/A 0.5 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) N/A N/A 0.7 μg/m3 (3) 23.0
 
March 15, 2019, 11 p.m. N/A 0.7 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 30.0 ppb (23) N/A N/A 1.4 μg/m3 (6) 23.0
 
March 15, 2019, 10 p.m. N/A 0.7 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 2.9 μg/m3 (12) 24.0
 
March 15, 2019, 9 p.m. N/A 3.3 ppb (3) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, 8 p.m. N/A 6.9 ppb (6) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 22.3 μg/m3 (72) 72.0
 
March 15, 2019, 7 p.m. N/A 5.6 ppb (5) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 20.0 ppb (15) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 15, 2019, 6 p.m. N/A 6.0 ppb (6) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 16.0 ppb (12) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.5 μg/m3 (57) 57.0
 
March 15, 2019, 4 p.m. N/A 3.3 ppb (3) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 15, 2019, 3 p.m. N/A 6.1 ppb (6) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 15, 2019, 2 p.m. N/A 0.3 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 12.0 ppb (9) N/A N/A 5.8 μg/m3 (24) 24.0
 
March 15, 2019, 1 p.m. N/A 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 14.0 ppb (11) N/A N/A 3.4 μg/m3 (14) 14.0
 
March 15, 2019, noon N/A 0.6 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 6.0 ppb (5) N/A N/A 15.5 μg/m3 (57) 57.0
 
March 15, 2019, 11 a.m. N/A 0.8 ppb (1) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 29.1 μg/m3 (86) 86.0
 
March 15, 2019, 10 a.m. N/A 0.4 ppb (0) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 6.0 ppb (5) N/A N/A 28.0 μg/m3 (84) 84.0
 
March 15, 2019, 9 a.m. N/A 0.3 ppb (0) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 24.8 μg/m3 (77) 77.0
 
March 15, 2019, 8 a.m. N/A 1.9 ppb (2) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 24.6 μg/m3 (77) 77.0
 
March 15, 2019, 7 a.m. N/A 0.5 ppb (0) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 6.0 ppb (5) N/A N/A 21.0 μg/m3 (69) 69.0
 
March 15, 2019, 6 a.m. N/A 2.4 ppb (2) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 26.6 μg/m3 (81) 81.0