AQSQID: CC0050109

Site Name: Duncan

Location: Mont-Royal (Duncan Rd), N/A

Reporting: True, Located: True

Current AQI: 59.0

Mont-Royal (Duncan Rd) N/A, CA: 45.502648, -73.663913

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 25, 2019, 10 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 16.0 ppb (12) 0.26 ppb (3) N/A 16.3 μg/m3 (59) 59.0
 
March 25, 2019, 9 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 22.0 ppb (17) 0.22 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
March 25, 2019, 8 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 31.0 ppb (24) 0.17 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
March 25, 2019, 7 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 25.0 ppb (19) 0.19 ppb (2) N/A 5.7 μg/m3 (24) 24.0
 
March 25, 2019, 6 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 23.0 ppb (18) 0.19 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
March 25, 2019, 5 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) 0.18 ppb (2) N/A 5.1 μg/m3 (21) 24.0
 
March 25, 2019, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
March 25, 2019, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.19 ppb (2) N/A 5.9 μg/m3 (25) 28.0
 
March 25, 2019, 2 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.2 ppb (2) N/A 5.7 μg/m3 (24) 28.0
 
March 25, 2019, 1 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 5.4 μg/m3 (23) 27.0
 
March 25, 2019, midnight N/A N/A N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.24 ppb (3) N/A 7.3 μg/m3 (30) 30.0
 
March 24, 2019, 11 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 38.0 ppb (29) 0.23 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
March 24, 2019, 10 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.25 ppb (3) N/A 7.5 μg/m3 (31) 31.0
 
March 24, 2019, 9 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 8.2 μg/m3 (34) 34.0
 
March 24, 2019, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.23 ppb (3) N/A 6.3 μg/m3 (26) 29.0
 
March 24, 2019, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.24 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
March 24, 2019, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.22 ppb (2) N/A 6.4 μg/m3 (27) 32.0
 
March 24, 2019, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.21 ppb (2) N/A 5.5 μg/m3 (23) 32.0
 
March 24, 2019, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.21 ppb (2) N/A 5.6 μg/m3 (23) 32.0
 
March 24, 2019, 3 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 31.0
 
March 24, 2019, 2 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.2 ppb (2) N/A 6.1 μg/m3 (25) 29.0
 
March 24, 2019, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.2 ppb (2) N/A 4.8 μg/m3 (20) 28.0
 
March 24, 2019, noon N/A N/A N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.2 ppb (2) N/A 4.2 μg/m3 (18) 26.0
 
March 24, 2019, 11 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 26.0
 
March 24, 2019, 10 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 26.0
 
March 24, 2019, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.17 ppb (2) N/A 3.7 μg/m3 (15) 28.0
 
March 24, 2019, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.16 ppb (2) N/A 3.4 μg/m3 (14) 29.0
 
March 24, 2019, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.17 ppb (2) N/A 3.4 μg/m3 (14) 29.0
 
March 24, 2019, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.19 ppb (2) N/A 3.8 μg/m3 (16) 28.0
 
March 24, 2019, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.18 ppb (2) N/A 4.7 μg/m3 (20) 27.0
 
March 24, 2019, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 24, 2019, 3 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
March 24, 2019, 2 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 5.9 μg/m3 (25) 26.0
 
March 24, 2019, 1 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 6.5 μg/m3 (27) 27.0
 
March 24, 2019, midnight N/A N/A N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 6.4 μg/m3 (27) 28.0
 
March 23, 2019, 11 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 34.0 ppb (26) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.22 ppb (2) N/A 6.8 μg/m3 (28) 29.0
 
March 23, 2019, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.2 ppb (2) N/A 5.5 μg/m3 (23) 30.0
 
March 23, 2019, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 31.0
 
March 23, 2019, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.18 ppb (2) N/A 1.8 μg/m3 (8) 31.0
 
March 23, 2019, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.18 ppb (2) N/A 1.8 μg/m3 (8) 31.0
 
March 23, 2019, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.17 ppb (2) N/A 1.6 μg/m3 (7) 31.0
 
March 23, 2019, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.19 ppb (2) N/A 1.6 μg/m3 (7) 30.0
 
March 23, 2019, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.19 ppb (2) N/A 1.8 μg/m3 (8) 29.0
 
March 23, 2019, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 30.0
 
March 23, 2019, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.18 ppb (2) N/A 2.6 μg/m3 (11) 29.0
 
March 23, 2019, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.18 ppb (2) N/A 3.1 μg/m3 (13) 28.0
 
March 23, 2019, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.16 ppb (2) N/A 2.6 μg/m3 (11) 28.0
 
March 23, 2019, 10 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.16 ppb (2) N/A 2.2 μg/m3 (9) 28.0
 
March 23, 2019, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.16 ppb (2) N/A 1.8 μg/m3 (8) 28.0
 
March 23, 2019, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.16 ppb (2) N/A 1.6 μg/m3 (7) 28.0
 
March 23, 2019, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.16 ppb (2) N/A 1.4 μg/m3 (6) 28.0
 
March 23, 2019, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.16 ppb (2) N/A 1.3 μg/m3 (5) 28.0
 
March 23, 2019, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.17 ppb (2) N/A 1.4 μg/m3 (6) 27.0
 
March 23, 2019, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.17 ppb (2) N/A 1.5 μg/m3 (6) 26.0
 
March 23, 2019, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.19 ppb (2) N/A 1.8 μg/m3 (8) 23.0
 
March 23, 2019, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.21 ppb (2) N/A 2.2 μg/m3 (9) 26.0
 
March 23, 2019, 1 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 2.5 μg/m3 (10) 27.0
 
March 23, 2019, midnight N/A N/A N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 2.9 μg/m3 (12) 25.0
 
March 22, 2019, 11 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 3.1 μg/m3 (13) 24.0
 
March 22, 2019, 10 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A 3.5 μg/m3 (15) 23.0
 
March 22, 2019, 9 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 24.0 ppb (18) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 8 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 27.0 ppb (21) 0.31 ppb (3) N/A 3.8 μg/m3 (16) 21.0
 
March 22, 2019, 7 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 26.0 ppb (20) 0.31 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
March 22, 2019, 6 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 6.5 μg/m3 (27) 27.0
 
March 22, 2019, 5 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) 0.26 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
March 22, 2019, 4 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 25.0 ppb (19) 0.27 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
March 22, 2019, 3 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 18.0 ppb (14) 0.3 ppb (3) N/A 12.6 μg/m3 (51) 51.0
 
March 22, 2019, 2 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 31.0 ppb (24) 0.24 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
March 22, 2019, 1 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
March 22, 2019, noon N/A N/A N/A 17.0 ppb (16) N/A N/A 25.0 ppb (19) 0.25 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
March 22, 2019, 11 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A 21.0 ppb (16) 0.24 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
March 22, 2019, 10 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 32.0 ppb (25) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 22, 2019, 9 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A 3.9 μg/m3 (16) 25.0
 
March 22, 2019, 8 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.17 ppb (2) N/A 3.5 μg/m3 (15) 30.0
 
March 22, 2019, 7 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.18 ppb (2) N/A 4.4 μg/m3 (18) 28.0
 
March 22, 2019, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.18 ppb (2) N/A 4.5 μg/m3 (19) 30.0
 
March 22, 2019, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.18 ppb (2) N/A 4.8 μg/m3 (20) 29.0
 
March 22, 2019, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.2 ppb (2) N/A 4.6 μg/m3 (19) 28.0
 
March 22, 2019, 3 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.23 ppb (3) N/A 6.1 μg/m3 (25) 26.0
 
March 22, 2019, 2 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
March 22, 2019, 1 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.24 ppb (3) N/A 4.8 μg/m3 (20) 28.0
 
March 22, 2019, midnight N/A N/A N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 5.7 μg/m3 (24) 26.0
 
March 21, 2019, 11 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
March 21, 2019, 10 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 32.0 ppb (25) 0.29 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
March 21, 2019, 9 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 32.0 ppb (25) 0.29 ppb (3) N/A 11.1 μg/m3 (46) 46.0
 
March 21, 2019, 8 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 32.0 ppb (25) 0.3 ppb (3) N/A 15.4 μg/m3 (57) 57.0
 
March 21, 2019, 7 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 33.0 ppb (25) 0.29 ppb (3) N/A 17.2 μg/m3 (61) 61.0
 
March 21, 2019, 6 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 31.0 ppb (24) 0.32 ppb (4) N/A 21.1 μg/m3 (69) 69.0
 
March 21, 2019, 5 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 31.0 ppb (24) 0.29 ppb (3) N/A 19.7 μg/m3 (66) 66.0
 
March 21, 2019, 4 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 33.0 ppb (25) 0.29 ppb (3) N/A 18.4 μg/m3 (64) 64.0
 
March 21, 2019, 3 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A 34.0 ppb (26) 0.29 ppb (3) N/A 18.7 μg/m3 (64) 64.0
 
March 21, 2019, 2 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A 20.3 μg/m3 (68) 68.0
 
March 21, 2019, 1 p.m. N/A N/A N/A 27.0 ppb (25) N/A N/A 24.0 ppb (18) 0.3 ppb (3) N/A 21.3 μg/m3 (70) 70.0
 
March 21, 2019, noon N/A N/A N/A 31.0 ppb (29) N/A N/A 17.0 ppb (13) 0.35 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
March 21, 2019, 11 a.m. N/A N/A N/A 31.0 ppb (29) N/A N/A 15.0 ppb (12) 0.36 ppb (4) N/A 17.6 μg/m3 (62) 62.0
 
March 21, 2019, 10 a.m. N/A N/A N/A 27.0 ppb (25) N/A N/A 17.0 ppb (13) 0.33 ppb (4) N/A 18.8 μg/m3 (64) 64.0
 
March 21, 2019, 9 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 17.4 μg/m3 (61) 61.0
 
March 21, 2019, 8 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 17.2 μg/m3 (61) 61.0
 
March 21, 2019, 7 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A 22.0 ppb (17) 0.32 ppb (4) N/A 20.5 μg/m3 (68) 68.0
 
March 21, 2019, 6 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 19.0 ppb (15) 0.28 ppb (3) N/A 22.4 μg/m3 (72) 72.0
 
March 21, 2019, 5 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 23.0 ppb (18) 0.28 ppb (3) N/A 25.6 μg/m3 (79) 79.0
 
March 21, 2019, 4 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 28.0 ppb (22) 0.28 ppb (3) N/A 23.5 μg/m3 (74) 74.0
 
March 21, 2019, 3 a.m. N/A N/A N/A 31.0 ppb (29) N/A N/A 22.0 ppb (17) 0.33 ppb (4) N/A 25.5 μg/m3 (79) 79.0
 
March 21, 2019, 2 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A 19.0 ppb (15) 0.41 ppb (5) N/A 26.0 μg/m3 (80) 80.0
 
March 21, 2019, 1 a.m. N/A N/A N/A 35.0 ppb (32) N/A N/A 13.0 ppb (10) 0.51 ppb (6) N/A 28.5 μg/m3 (85) 85.0
 
March 21, 2019, midnight N/A N/A N/A 32.0 ppb (30) N/A N/A 19.0 ppb (15) 0.45 ppb (5) N/A 26.8 μg/m3 (81) 81.0
 
March 20, 2019, 11 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 27.0 ppb (21) 0.34 ppb (4) N/A 22.0 μg/m3 (71) 71.0
 
March 20, 2019, 10 p.m. N/A N/A N/A 27.0 ppb (25) N/A N/A 27.0 ppb (21) 0.39 ppb (4) N/A 26.0 μg/m3 (80) 80.0
 
March 20, 2019, 9 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 34.0 ppb (26) 0.31 ppb (3) N/A 23.6 μg/m3 (75) 75.0
 
March 20, 2019, 8 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 31.0 ppb (24) 0.31 ppb (3) N/A 26.8 μg/m3 (81) 81.0
 
March 20, 2019, 7 p.m. N/A N/A N/A 31.0 ppb (29) N/A N/A 29.0 ppb (22) 0.31 ppb (3) N/A 27.4 μg/m3 (83) 83.0
 
March 20, 2019, 6 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 31.0 ppb (24) 0.29 ppb (3) N/A 22.7 μg/m3 (73) 73.0
 
March 20, 2019, 5 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 19.4 μg/m3 (66) 66.0
 
March 20, 2019, 4 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 31.0 ppb (24) 0.28 ppb (3) N/A 19.1 μg/m3 (65) 65.0
 
March 20, 2019, 3 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 25.0 ppb (19) 0.31 ppb (3) N/A 24.4 μg/m3 (76) 76.0
 
March 20, 2019, 2 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 23.0 ppb (18) 0.31 ppb (3) N/A 19.1 μg/m3 (65) 65.0
 
March 20, 2019, 1 p.m. N/A N/A N/A 27.0 ppb (25) N/A N/A 17.0 ppb (13) 0.35 ppb (4) N/A 21.5 μg/m3 (70) 70.0
 
March 20, 2019, noon N/A N/A N/A 34.0 ppb (31) N/A N/A 10.0 ppb (8) 0.43 ppb (5) N/A 21.1 μg/m3 (69) 69.0
 
March 20, 2019, 11 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A 8.0 ppb (6) 0.38 ppb (4) N/A 14.3 μg/m3 (55) 55.0
 
March 20, 2019, 10 a.m. N/A N/A N/A 39.0 ppb (36) N/A N/A 5.0 ppb (4) 0.38 ppb (4) N/A 12.7 μg/m3 (51) 51.0
 
March 20, 2019, 9 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 12.0 ppb (9) 0.3 ppb (3) N/A 10.1 μg/m3 (42) 42.0
 
March 20, 2019, 8 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 21.0 ppb (16) 0.21 ppb (2) N/A 7.5 μg/m3 (31) 31.0
 
March 20, 2019, 7 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A 15.0 ppb (12) 0.19 ppb (2) N/A 7.8 μg/m3 (32) 32.0
 
March 20, 2019, 6 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.18 ppb (2) N/A 6.7 μg/m3 (28) 28.0
 
March 20, 2019, 5 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 27.0 ppb (21) 0.19 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
March 20, 2019, 4 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 27.0 ppb (21) 0.22 ppb (2) N/A 10.6 μg/m3 (44) 44.0
 
March 20, 2019, 3 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 27.0 ppb (21) 0.26 ppb (3) N/A 9.9 μg/m3 (41) 41.0
 
March 20, 2019, 2 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 1 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 17.0 ppb (13) 0.34 ppb (4) N/A 13.8 μg/m3 (54) 54.0
 
March 20, 2019, midnight N/A N/A N/A 42.0 ppb (39) N/A N/A 9.0 ppb (7) 0.36 ppb (4) N/A 15.1 μg/m3 (57) 57.0
 
March 19, 2019, 11 p.m. N/A N/A N/A 38.0 ppb (35) N/A N/A 12.0 ppb (9) 0.49 ppb (5) N/A 20.7 μg/m3 (69) 69.0
 
March 19, 2019, 10 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 12.9 μg/m3 (52) 52.0
 
March 19, 2019, 9 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 35.0 ppb (27) 0.25 ppb (3) N/A 11.7 μg/m3 (49) 49.0
 
March 19, 2019, 8 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 16.9 μg/m3 (60) 60.0
 
March 19, 2019, 7 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 31.0 ppb (24) 0.26 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
March 19, 2019, 6 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A 29.0 ppb (22) N/A N/A 19.5 μg/m3 (66) 66.0
 
March 19, 2019, 5 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 24.0 ppb (18) 0.32 ppb (4) N/A N/A 22.0
 
March 19, 2019, 4 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 25.0 ppb (19) 0.35 ppb (4) N/A N/A 22.0
 
March 19, 2019, 3 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A 23.0 ppb (18) 0.34 ppb (4) N/A N/A 24.0
 
March 19, 2019, 2 p.m. N/A N/A N/A 31.0 ppb (29) N/A N/A 18.0 ppb (14) 0.36 ppb (4) N/A N/A 29.0
 
March 19, 2019, 1 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 17.0 ppb (13) 0.37 ppb (4) N/A 12.6 μg/m3 (51) 51.0
 
March 19, 2019, noon N/A N/A N/A 42.0 ppb (39) N/A N/A 7.0 ppb (5) 0.49 ppb (5) N/A 18.3 μg/m3 (63) 63.0
 
March 19, 2019, 11 a.m. N/A N/A N/A 44.0 ppb (41) N/A N/A 2.0 ppb (2) 0.48 ppb (5) N/A 18.1 μg/m3 (63) 63.0
 
March 19, 2019, 10 a.m. N/A N/A N/A 43.0 ppb (40) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 16.3 μg/m3 (59) 59.0
 
March 19, 2019, 9 a.m. N/A N/A N/A 43.0 ppb (40) N/A N/A 1.0 ppb (1) 0.41 ppb (5) N/A 19.0 μg/m3 (65) 65.0
 
March 19, 2019, 8 a.m. N/A N/A N/A 38.0 ppb (35) N/A N/A 3.0 ppb (2) 0.33 ppb (4) N/A 18.6 μg/m3 (64) 64.0
 
March 19, 2019, 7 a.m. N/A N/A N/A 34.0 ppb (31) N/A N/A 5.0 ppb (4) 0.31 ppb (3) N/A 19.6 μg/m3 (66) 66.0
 
March 19, 2019, 6 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A 6.0 ppb (5) 0.31 ppb (3) N/A 19.8 μg/m3 (67) 67.0
 
March 19, 2019, 5 a.m. N/A N/A N/A 32.0 ppb (30) N/A N/A 8.0 ppb (6) 0.29 ppb (3) N/A 14.9 μg/m3 (56) 56.0
 
March 19, 2019, 4 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 13.0 ppb (10) 0.29 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
March 19, 2019, 3 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 18.0 ppb (14) 0.27 ppb (3) N/A 13.6 μg/m3 (53) 53.0
 
March 19, 2019, 2 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 22.0 ppb (17) 0.34 ppb (4) N/A 15.3 μg/m3 (57) 57.0
 
March 19, 2019, 1 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 22.0 ppb (17) 0.33 ppb (4) N/A 14.9 μg/m3 (56) 56.0
 
March 19, 2019, midnight N/A N/A N/A 20.0 ppb (19) N/A N/A 27.0 ppb (21) 0.28 ppb (3) N/A 13.3 μg/m3 (53) 53.0
 
March 18, 2019, 11 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 12.4 μg/m3 (51) 51.0
 
March 18, 2019, 10 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 9 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
March 18, 2019, 8 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
March 18, 2019, 7 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 36.0 ppb (28) 0.22 ppb (2) N/A 10.2 μg/m3 (42) 42.0
 
March 18, 2019, 6 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A 34.0 ppb (26) 0.21 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 18, 2019, 5 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 37.0 ppb (28) 0.18 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
March 18, 2019, 4 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.2 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
March 18, 2019, 3 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 34.0 ppb (26) 0.2 ppb (2) N/A 8.8 μg/m3 (37) 37.0
 
March 18, 2019, 2 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A 31.0 ppb (24) 0.21 ppb (2) N/A 9.7 μg/m3 (40) 40.0
 
March 18, 2019, 1 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A 25.0 ppb (19) 0.26 ppb (3) N/A 11.1 μg/m3 (46) 46.0
 
March 18, 2019, noon N/A N/A N/A 22.0 ppb (20) N/A N/A 22.0 ppb (17) 0.29 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
March 18, 2019, 11 a.m. N/A N/A N/A 31.0 ppb (29) N/A N/A 14.0 ppb (11) 0.37 ppb (4) N/A 9.1 μg/m3 (38) 38.0