AQSQID: 250250044

Site Name: Boston-Von Hillern

Location: Boston, MA

Reporting: True, Located: True

Current AQI: 39.0

Boston MA, US: 42.325197, -71.056056

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 17, 2019, 10 a.m. 42.0 ppb (39) 20.0 ppb (19) N/A 22.0 ppb (20) N/A N/A N/A 0.21 ppb (2) N/A N/A 39.0
 
Jan. 17, 2019, 9 a.m. 29.0 ppb (27) 9.0 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.14 ppb (2) N/A N/A 27.0
 
Jan. 17, 2019, 8 a.m. 26.0 ppb (24) 7.0 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A 0.11 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 7 a.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.1 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 6 a.m. 17.0 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.12 ppb (1) N/A 0.0 μg/m3 (0) 16.0
 
Jan. 17, 2019, 5 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.15 ppb (2) N/A 0.0 μg/m3 (0) 13.0
 
Jan. 16, 2019, 11 p.m. 31.0 ppb (29) 13.0 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 16, 2019, 10 p.m. 35.0 ppb (32) 14.0 ppb (13) N/A 20.0 ppb (19) N/A N/A N/A 0.35 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 9 p.m. 32.0 ppb (30) 14.0 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A 0.35 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, 8 p.m. 30.0 ppb (28) 15.0 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A 0.31 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, 7 p.m. 28.0 ppb (26) 13.0 ppb (12) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 6 p.m. 34.0 ppb (31) 18.0 ppb (17) N/A 16.0 ppb (15) N/A N/A N/A 0.28 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 5 p.m. 34.0 ppb (31) 18.0 ppb (17) N/A 16.0 ppb (15) N/A N/A N/A 0.31 ppb (3) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 16, 2019, 4 p.m. 38.0 ppb (35) 20.0 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 16, 2019, 3 p.m. 53.0 ppb (49) 33.0 ppb (31) N/A 20.0 ppb (19) N/A N/A N/A 0.31 ppb (3) N/A 22.0 μg/m3 (71) 71.0
 
Jan. 16, 2019, 2 p.m. 65.0 ppb (62) 42.0 ppb (39) N/A 24.0 ppb (22) N/A N/A N/A 0.4 ppb (4) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 16, 2019, 1 p.m. 80.0 ppb (78) 50.0 ppb (46) N/A 30.0 ppb (28) N/A N/A N/A 0.5 ppb (6) N/A 20.0 μg/m3 (67) 78.0
 
Jan. 16, 2019, noon 97.0 ppb (96) 63.0 ppb (60) N/A 35.0 ppb (32) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 96.0
 
Jan. 16, 2019, 11 a.m. 92.0 ppb (90) 58.0 ppb (54) N/A 35.0 ppb (32) N/A N/A N/A 0.58 ppb (6) N/A 19.0 μg/m3 (65) 90.0
 
Jan. 16, 2019, 10 a.m. 65.0 ppb (62) 32.0 ppb (30) N/A 33.0 ppb (31) N/A N/A N/A 0.4 ppb (4) N/A 15.0 μg/m3 (56) 62.0
 
Jan. 16, 2019, 9 a.m. 47.0 ppb (44) 17.0 ppb (16) N/A 29.0 ppb (27) N/A N/A N/A 0.3 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.32 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 6 a.m. 66.0 ppb (63) 30.0 ppb (28) N/A 36.0 ppb (33) N/A N/A N/A 0.42 ppb (5) N/A 14.0 μg/m3 (54) 63.0
 
Jan. 16, 2019, 5 a.m. 67.0 ppb (64) 30.0 ppb (28) N/A 37.0 ppb (34) N/A N/A N/A 0.48 ppb (5) N/A 14.0 μg/m3 (54) 64.0
 
Jan. 16, 2019, 4 a.m. 106.0 ppb (101) 66.0 ppb (63) N/A 40.0 ppb (37) N/A N/A N/A N/A N/A 18.0 μg/m3 (63) 101.0
 
Jan. 16, 2019, 3 a.m. 154.0 ppb (110) 111.0 ppb (102) N/A 43.0 ppb (40) N/A N/A N/A 0.87 ppb (10) N/A 17.0 μg/m3 (61) 110.0
 
Jan. 16, 2019, 2 a.m. 86.0 ppb (84) 47.0 ppb (44) N/A 40.0 ppb (37) N/A N/A N/A 0.79 ppb (9) N/A 11.0 μg/m3 (46) 84.0
 
Jan. 16, 2019, 1 a.m. 49.0 ppb (45) 18.0 ppb (17) N/A 31.0 ppb (29) N/A N/A N/A 0.46 ppb (5) N/A 8.0 μg/m3 (33) 45.0
 
Jan. 16, 2019, midnight 39.0 ppb (36) 11.0 ppb (10) N/A 28.0 ppb (26) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 36.0
 
Jan. 15, 2019, 11 p.m. 33.0 ppb (31) 10.0 ppb (9) N/A 23.0 ppb (21) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
Jan. 15, 2019, 10 p.m. 28.0 ppb (26) 10.0 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 15, 2019, 9 p.m. 28.0 ppb (26) 10.0 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 8 p.m. 29.0 ppb (27) 12.0 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 7 p.m. 31.0 ppb (29) 14.0 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 6 p.m. 30.0 ppb (28) 13.0 ppb (12) N/A 17.0 ppb (16) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 5 p.m. 37.0 ppb (34) 18.0 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 4 p.m. 35.0 ppb (32) 18.0 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 3 p.m. 57.0 ppb (53) 33.0 ppb (31) N/A 24.0 ppb (22) N/A N/A N/A 0.28 ppb (3) N/A 10.0 μg/m3 (42) 53.0
 
Jan. 15, 2019, 2 p.m. 64.0 ppb (61) 38.0 ppb (35) N/A 26.0 ppb (24) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (33) 61.0
 
Jan. 15, 2019, 1 p.m. 66.0 ppb (63) 35.0 ppb (32) N/A 31.0 ppb (29) N/A N/A N/A 0.39 ppb (4) N/A 13.0 μg/m3 (52) 63.0
 
Jan. 15, 2019, noon 85.0 ppb (83) 48.0 ppb (44) N/A 37.0 ppb (34) N/A N/A N/A 0.48 ppb (5) N/A 10.0 μg/m3 (42) 83.0
 
Jan. 15, 2019, 11 a.m. 67.0 ppb (64) 35.0 ppb (32) N/A 31.0 ppb (29) N/A N/A N/A 0.36 ppb (4) N/A 10.0 μg/m3 (42) 64.0
 
Jan. 15, 2019, 10 a.m. 56.0 ppb (52) 25.0 ppb (23) N/A 31.0 ppb (29) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 52.0
 
Jan. 15, 2019, 9 a.m. 49.0 ppb (45) 19.0 ppb (18) N/A 30.0 ppb (28) N/A N/A N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 45.0
 
Jan. 15, 2019, 8 a.m. 38.0 ppb (35) 11.0 ppb (10) N/A 27.0 ppb (25) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 35.0
 
Jan. 15, 2019, 7 a.m. 36.0 ppb (33) 9.0 ppb (8) N/A 27.0 ppb (25) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 6 a.m. 32.0 ppb (30) 7.0 ppb (6) N/A 25.0 ppb (23) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Jan. 15, 2019, 5 a.m. 33.0 ppb (31) 8.0 ppb (7) N/A 26.0 ppb (24) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 31.0
 
Jan. 15, 2019, 4 a.m. 38.0 ppb (35) 10.0 ppb (9) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 3 a.m. 44.0 ppb (41) 13.0 ppb (12) N/A 32.0 ppb (30) N/A N/A N/A 0.36 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 15, 2019, 2 a.m. 77.0 ppb (74) 38.0 ppb (35) N/A 39.0 ppb (36) N/A N/A N/A 0.6 ppb (7) N/A 17.0 μg/m3 (61) 74.0
 
Jan. 15, 2019, 1 a.m. 146.0 ppb (109) 100.0 ppb (99) N/A 46.0 ppb (43) N/A N/A N/A 1.04 ppb (12) N/A 18.0 μg/m3 (63) 109.0
 
Jan. 15, 2019, midnight 141.0 ppb (108) 96.0 ppb (95) N/A 46.0 ppb (43) N/A N/A N/A 0.98 ppb (11) N/A 13.0 μg/m3 (52) 108.0
 
Jan. 14, 2019, 11 p.m. 79.0 ppb (77) 40.0 ppb (37) N/A 39.0 ppb (36) N/A N/A N/A 0.61 ppb (7) N/A 10.0 μg/m3 (42) 77.0
 
Jan. 14, 2019, 10 p.m. 45.0 ppb (42) 15.0 ppb (14) N/A 30.0 ppb (28) N/A N/A N/A 0.38 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 9 p.m. 21.0 ppb (19) 7.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2019, 8 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 14, 2019, 7 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.14 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 6 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.15 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2019, 5 p.m. 21.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 4 p.m. 20.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 14, 2019, 3 p.m. 24.0 ppb (22) 7.0 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 14, 2019, 2 p.m. 37.0 ppb (34) 13.0 ppb (12) N/A 23.0 ppb (21) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2019, 1 p.m. 42.0 ppb (39) 14.0 ppb (13) N/A 28.0 ppb (26) N/A N/A N/A 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, noon 62.0 ppb (59) 27.0 ppb (25) N/A 34.0 ppb (31) N/A N/A N/A 0.3 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 14, 2019, 11 a.m. 64.0 ppb (61) 29.0 ppb (27) N/A 35.0 ppb (32) N/A N/A N/A 0.28 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 14, 2019, 10 a.m. 59.0 ppb (55) 24.0 ppb (22) N/A 35.0 ppb (32) N/A N/A N/A 0.27 ppb (3) N/A 11.0 μg/m3 (46) 55.0
 
Jan. 14, 2019, 9 a.m. 46.0 ppb (43) 15.0 ppb (14) N/A 31.0 ppb (29) N/A N/A N/A 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 14, 2019, 8 a.m. 45.0 ppb (42) 13.0 ppb (12) N/A 32.0 ppb (30) N/A N/A N/A 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 14, 2019, 7 a.m. 39.0 ppb (36) 9.0 ppb (8) N/A 30.0 ppb (28) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 6 a.m. 34.0 ppb (31) 6.0 ppb (6) N/A 29.0 ppb (27) N/A N/A N/A 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 5 a.m. 18.0 ppb (17) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2019, 4 a.m. 21.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A N/A 19.0
 
Jan. 14, 2019, 3 a.m. 20.0 ppb (19) 3.0 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 14, 2019, 2 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 1 a.m. 22.0 ppb (20) 3.0 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, midnight 25.0 ppb (23) 3.0 ppb (3) N/A 22.0 ppb (20) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 13, 2019, 11 p.m. 20.0 ppb (19) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 13, 2019, 10 p.m. 20.0 ppb (19) 3.0 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 13, 2019, 9 p.m. 22.0 ppb (20) 6.0 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.11 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 8 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.12 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 13, 2019, 7 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 6 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.17 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 13, 2019, 5 p.m. 17.0 ppb (16) 7.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 4 p.m. 31.0 ppb (29) 14.0 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A 0.29 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 13, 2019, 3 p.m. 32.0 ppb (30) 14.0 ppb (13) N/A 18.0 ppb (17) N/A N/A N/A 0.29 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 13, 2019, 2 p.m. 30.0 ppb (28) 11.0 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.28 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 13, 2019, 1 p.m. 31.0 ppb (29) 10.0 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, noon 33.0 ppb (31) 10.0 ppb (9) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 11 a.m. 23.0 ppb (21) 6.0 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 13, 2019, 10 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 9 a.m. 17.0 ppb (16) 3.0 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.13 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 13, 2019, 6 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 5 a.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 13, 2019, 4 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 13, 2019, 3 a.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 2 a.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 13, 2019, 1 a.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, midnight 20.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 12, 2019, 11 p.m. 20.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, 10 p.m. 19.0 ppb (18) 6.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 18.0
 
Jan. 12, 2019, 9 p.m. 16.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, 8 p.m. 17.0 ppb (16) 6.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 12, 2019, 7 p.m. 18.0 ppb (17) 8.0 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 12, 2019, 6 p.m. 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 12, 2019, 5 p.m. 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 12, 2019, 4 p.m. 17.0 ppb (16) 8.0 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 3 p.m. 18.0 ppb (17) 8.0 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 12, 2019, 2 p.m. 23.0 ppb (21) 10.0 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 1 p.m. 28.0 ppb (26) 11.0 ppb (10) N/A 17.0 ppb (16) N/A N/A N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 12, 2019, noon 31.0 ppb (29) 12.0 ppb (11) N/A 19.0 ppb (18) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 12, 2019, 11 a.m. 28.0 ppb (26) 10.0 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 12, 2019, 10 a.m. 22.0 ppb (20) 7.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, 9 a.m. 14.0 ppb (13) 5.0 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.13 ppb (1) N/A 2.0 μg/m3 (8) 13.0
 
Jan. 12, 2019, 8 a.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 12, 2019, 7 a.m. 10.0 ppb (9) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.12 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 12, 2019, 6 a.m. 11.0 ppb (10) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.14 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 12, 2019, 5 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.14 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 12, 2019, 2 a.m. 14.0 ppb (13) 5.0 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 12, 2019, 1 a.m. 17.0 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 12, 2019, midnight 17.0 ppb (16) 6.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 11, 2019, 11 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 11, 2019, 10 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 11, 2019, 9 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 11, 2019, 8 p.m. 23.0 ppb (21) 10.0 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 11, 2019, 7 p.m. 27.0 ppb (25) 13.0 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.21 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 11, 2019, 6 p.m. 29.0 ppb (27) 15.0 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A 0.23 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 11, 2019, 5 p.m. 26.0 ppb (24) 14.0 ppb (13) N/A 12.0 ppb (11) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 4 p.m. 28.0 ppb (26) 15.0 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 11, 2019, 3 p.m. 41.0 ppb (38) 24.0 ppb (22) N/A 17.0 ppb (16) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 38.0
 
Jan. 11, 2019, 2 p.m. 51.0 ppb (47) 30.0 ppb (28) N/A 21.0 ppb (19) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 47.0
 
Jan. 11, 2019, 1 p.m. 38.0 ppb (35) 20.0 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 11, 2019, noon 44.0 ppb (41) 24.0 ppb (22) N/A 20.0 ppb (19) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 41.0
 
Jan. 11, 2019, 11 a.m. 43.0 ppb (40) 24.0 ppb (22) N/A 20.0 ppb (19) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 40.0
 
Jan. 11, 2019, 10 a.m. 29.0 ppb (27) 15.0 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 11, 2019, 9 a.m. 18.0 ppb (17) 7.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.15 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 11, 2019, 8 a.m. 13.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.12 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 7 a.m. 12.0 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.12 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 6 a.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.12 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 11, 2019, 5 a.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.13 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2019, 3 a.m. 12.0 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 11, 2019, 2 a.m. 12.0 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.19 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 11, 2019, 1 a.m. 17.0 ppb (16) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 11, 2019, midnight 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2019, 11 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 10, 2019, 10 p.m. 17.0 ppb (16) 7.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2019, 9 p.m. 25.0 ppb (23) 10.0 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2019, 8 p.m. 25.0 ppb (23) 11.0 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2019, 7 p.m. 27.0 ppb (25) 14.0 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2019, 6 p.m. 31.0 ppb (29) 16.0 ppb (15) N/A 15.0 ppb (14) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 10, 2019, 5 p.m. 29.0 ppb (27) 15.0 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 10, 2019, 4 p.m. 30.0 ppb (28) 17.0 ppb (16) N/A 14.0 ppb (13) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 10, 2019, 3 p.m. 42.0 ppb (39) 25.0 ppb (23) N/A 18.0 ppb (17) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 10, 2019, 2 p.m. 42.0 ppb (39) 26.0 ppb (24) N/A 16.0 ppb (15) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 39.0
 
Jan. 10, 2019, 1 p.m. 38.0 ppb (35) 21.0 ppb (19) N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 10, 2019, noon 40.0 ppb (37) 23.0 ppb (21) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 37.0
 
Jan. 10, 2019, 11 a.m. 48.0 ppb (44) 30.0 ppb (28) N/A 18.0 ppb (17) N/A N/A N/A 0.26 ppb (3) N/A 10.0 μg/m3 (42) 44.0
 
Jan. 10, 2019, 10 a.m. 28.0 ppb (26) 17.0 ppb (16) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 10, 2019, 9 a.m. 19.0 ppb (18) 10.0 ppb (9) N/A 9.0 ppb (8) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 10, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.1 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 10, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.11 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 10, 2019, 6 a.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 10, 2019, 5 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 10, 2019, 4 a.m. 9.0 ppb (8) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 10, 2019, 3 a.m. 12.0 ppb (11) 6.0 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0