AQSQID: 250250044

Site Name: Boston-Von Hillern

Location: Boston, MA

Reporting: True, Located: True

Current AQI: 100.0

Boston MA, US: 42.325197, -71.056056

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Nov. 22, 2019, midnight 102.0 ppb (100) 69.0 ppb (66) N/A 34.0 ppb (31) N/A N/A N/A 0.77 ppb (9) N/A 16.0 μg/m3 (59) 100.0
 
Nov. 21, 2019, 11 p.m. 127.0 ppb (105) 92.0 ppb (90) N/A 35.0 ppb (32) N/A N/A N/A 0.92 ppb (10) N/A 13.0 μg/m3 (52) 105.0
 
Nov. 21, 2019, 10 p.m. 97.0 ppb (96) 59.0 ppb (55) N/A 38.0 ppb (35) N/A N/A N/A 0.74 ppb (8) N/A 6.0 μg/m3 (25) 96.0
 
Nov. 21, 2019, 9 p.m. 56.0 ppb (52) 26.0 ppb (24) N/A 30.0 ppb (28) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (12) 52.0
 
Nov. 21, 2019, 8 p.m. 32.0 ppb (30) 13.0 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 21, 2019, 7 p.m. 34.0 ppb (31) 16.0 ppb (15) N/A 18.0 ppb (17) N/A N/A N/A 0.27 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Nov. 21, 2019, 6 p.m. 43.0 ppb (40) 23.0 ppb (21) N/A 20.0 ppb (19) N/A N/A N/A 0.28 ppb (3) N/A 22.0 μg/m3 (71) 71.0
 
Nov. 21, 2019, 5 p.m. 49.0 ppb (45) 28.0 ppb (26) N/A 20.0 ppb (19) N/A N/A N/A 0.28 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Nov. 21, 2019, 4 p.m. 52.0 ppb (48) 32.0 ppb (30) N/A 20.0 ppb (19) N/A N/A N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 48.0
 
Nov. 21, 2019, 3 p.m. 58.0 ppb (54) 36.0 ppb (33) N/A 22.0 ppb (20) N/A N/A N/A 0.25 ppb (3) N/A 12.0 μg/m3 (50) 54.0
 
Nov. 21, 2019, 2 p.m. 56.0 ppb (52) 33.0 ppb (31) N/A 22.0 ppb (20) N/A N/A N/A 0.22 ppb (2) N/A 11.0 μg/m3 (46) 52.0
 
Nov. 21, 2019, 1 p.m. 55.0 ppb (51) 33.0 ppb (31) N/A 22.0 ppb (20) N/A N/A N/A 0.27 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Nov. 21, 2019, noon 59.0 ppb (55) 36.0 ppb (33) N/A 23.0 ppb (21) N/A N/A N/A 0.4 ppb (4) N/A 6.0 μg/m3 (25) 55.0
 
Nov. 21, 2019, 11 a.m. 62.0 ppb (59) 37.0 ppb (34) N/A 24.0 ppb (22) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (33) 59.0
 
Nov. 21, 2019, 10 a.m. 40.0 ppb (37) 20.0 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Nov. 21, 2019, 9 a.m. 27.0 ppb (25) 10.0 ppb (9) N/A 17.0 ppb (16) N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
Nov. 21, 2019, 8 a.m. 20.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (13) N/A N/A N/A 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 21, 2019, 7 a.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Nov. 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 21, 2019, 4 a.m. 22.0 ppb (20) 7.0 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 21, 2019, 3 a.m. 22.0 ppb (20) 8.0 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Nov. 21, 2019, 2 a.m. 26.0 ppb (24) 11.0 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 21, 2019, 1 a.m. 25.0 ppb (23) 11.0 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 21, 2019, midnight 23.0 ppb (21) 8.0 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Nov. 20, 2019, 11 p.m. 24.0 ppb (22) 10.0 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Nov. 20, 2019, 10 p.m. 26.0 ppb (24) 9.0 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Nov. 20, 2019, 9 p.m. 32.0 ppb (30) 12.0 ppb (11) N/A 20.0 ppb (19) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 20, 2019, 8 p.m. 46.0 ppb (43) 23.0 ppb (21) N/A 23.0 ppb (21) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 43.0
 
Nov. 20, 2019, 7 p.m. 55.0 ppb (51) 30.0 ppb (28) N/A 25.0 ppb (23) N/A N/A N/A 0.26 ppb (3) N/A 9.0 μg/m3 (38) 51.0
 
Nov. 20, 2019, 6 p.m. 42.0 ppb (39) 20.0 ppb (19) N/A 22.0 ppb (20) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 39.0
 
Nov. 20, 2019, 5 p.m. 41.0 ppb (38) 19.0 ppb (18) N/A 22.0 ppb (20) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
Nov. 20, 2019, 4 p.m. 50.0 ppb (46) 25.0 ppb (23) N/A 25.0 ppb (23) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 46.0
 
Nov. 20, 2019, 3 p.m. 33.0 ppb (31) 12.0 ppb (11) N/A 21.0 ppb (19) N/A N/A N/A 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 20, 2019, 2 p.m. 28.0 ppb (26) 9.0 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Nov. 20, 2019, 1 p.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Nov. 20, 2019, noon 27.0 ppb (25) 8.0 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Nov. 20, 2019, 11 a.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 19.0
 
Nov. 20, 2019, 10 a.m. 16.0 ppb (15) 3.0 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.12 ppb (1) N/A 2.0 μg/m3 (8) 15.0
 
Nov. 20, 2019, 9 a.m. 21.0 ppb (19) 3.0 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.11 ppb (1) N/A 3.0 μg/m3 (12) 19.0
 
Nov. 20, 2019, 8 a.m. 13.0 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A 0.07 ppb (1) N/A 1.0 μg/m3 (4) 12.0
 
Nov. 20, 2019, 7 a.m. 22.0 ppb (20) 2.0 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A 0.09 ppb (1) N/A 0.0 μg/m3 (0) 20.0
 
Nov. 20, 2019, 6 a.m. 22.0 ppb (20) 2.0 ppb (2) N/A 19.0 ppb (18) N/A N/A N/A 0.1 ppb (1) N/A 1.0 μg/m3 (4) 20.0
 
Nov. 20, 2019, 5 a.m. 14.0 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (13) N/A N/A N/A 0.09 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Nov. 20, 2019, 4 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.09 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 20, 2019, 3 a.m. 13.0 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 20, 2019, 2 a.m. 20.0 ppb (19) 3.0 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 20, 2019, 1 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Nov. 20, 2019, midnight 33.0 ppb (31) 6.0 ppb (6) N/A 27.0 ppb (25) N/A N/A N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 19, 2019, 11 p.m. 40.0 ppb (37) 11.0 ppb (10) N/A 29.0 ppb (27) N/A N/A N/A 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 19, 2019, 10 p.m. 41.0 ppb (38) 13.0 ppb (12) N/A 28.0 ppb (26) N/A N/A N/A 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Nov. 19, 2019, 9 p.m. 53.0 ppb (49) 23.0 ppb (21) N/A 31.0 ppb (29) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (29) 49.0
 
Nov. 19, 2019, 8 p.m. 43.0 ppb (40) 14.0 ppb (13) N/A 30.0 ppb (28) N/A N/A N/A 0.26 ppb (3) N/A 8.0 μg/m3 (33) 40.0
 
Nov. 19, 2019, 7 p.m. 47.0 ppb (44) 24.0 ppb (22) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 44.0
 
Nov. 19, 2019, 6 p.m. 64.0 ppb (61) 40.0 ppb (37) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 61.0
 
Nov. 19, 2019, 5 p.m. 44.0 ppb (41) 22.0 ppb (20) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 41.0
 
Nov. 19, 2019, 4 p.m. 17.0 ppb (16) 2.0 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 19, 2019, 3 p.m. 18.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 19, 2019, 2 p.m. 23.0 ppb (21) 5.0 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Nov. 19, 2019, 1 p.m. 31.0 ppb (29) 8.0 ppb (7) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Nov. 19, 2019, noon 45.0 ppb (42) 12.0 ppb (11) N/A 33.0 ppb (31) N/A N/A N/A 0.17 ppb (2) N/A 8.0 μg/m3 (33) 42.0
 
Nov. 19, 2019, 11 a.m. 30.0 ppb (28) 3.0 ppb (3) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Nov. 19, 2019, 10 a.m. 40.0 ppb (37) 13.0 ppb (12) N/A 27.0 ppb (25) N/A N/A N/A 0.11 ppb (1) N/A 8.0 μg/m3 (33) 37.0
 
Nov. 19, 2019, 9 a.m. 39.0 ppb (36) 13.0 ppb (12) N/A 26.0 ppb (24) N/A N/A N/A 0.04 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Nov. 19, 2019, 8 a.m. 27.0 ppb (25) 6.0 ppb (6) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Nov. 19, 2019, 7 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.02 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 19, 2019, 6 a.m. 14.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 19, 2019, 5 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 19, 2019, 4 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Nov. 19, 2019, 3 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Nov. 19, 2019, 2 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 19, 2019, 1 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Nov. 19, 2019, midnight 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 18, 2019, 11 p.m. 16.0 ppb (15) 3.0 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Nov. 18, 2019, 10 p.m. 26.0 ppb (24) 6.0 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.01 ppb (0) N/A 4.0 μg/m3 (17) 24.0
 
Nov. 18, 2019, 9 p.m. 38.0 ppb (35) 12.0 ppb (11) N/A 26.0 ppb (24) N/A N/A N/A 0.03 ppb (0) N/A 5.0 μg/m3 (21) 35.0
 
Nov. 18, 2019, 8 p.m. 18.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 18, 2019, 7 p.m. 17.0 ppb (16) 3.0 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 18, 2019, 6 p.m. 25.0 ppb (23) 7.0 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.0 ppb (0) N/A 5.0 μg/m3 (21) 23.0
 
Nov. 18, 2019, 5 p.m. 27.0 ppb (25) 8.0 ppb (7) N/A 18.0 ppb (17) N/A N/A N/A 0.0 ppb (0) N/A 7.0 μg/m3 (29) 29.0
 
Nov. 18, 2019, 4 p.m. 19.0 ppb (18) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 18, 2019, 3 p.m. 24.0 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.02 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 18, 2019, 2 p.m. 32.0 ppb (30) 11.0 ppb (10) N/A 21.0 ppb (19) N/A N/A N/A 0.03 ppb (0) N/A 2.0 μg/m3 (8) 30.0
 
Nov. 18, 2019, 1 p.m. 26.0 ppb (24) 6.0 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.03 ppb (0) N/A 4.0 μg/m3 (17) 24.0
 
Nov. 18, 2019, noon 26.0 ppb (24) 6.0 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.02 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Nov. 18, 2019, 11 a.m. 29.0 ppb (27) 8.0 ppb (7) N/A 21.0 ppb (19) N/A N/A N/A 0.02 ppb (0) N/A 6.0 μg/m3 (25) 27.0
 
Nov. 18, 2019, 10 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 13.0
 
Nov. 18, 2019, 9 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Nov. 18, 2019, 8 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 18, 2019, 7 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.01 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 18, 2019, 4 a.m. 17.0 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 18, 2019, 3 a.m. 5.0 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 18, 2019, 2 a.m. 3.0 ppb (3) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 18, 2019, 1 a.m. 3.0 ppb (3) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 18, 2019, midnight 2.0 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Nov. 17, 2019, 11 p.m. 1.0 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Nov. 17, 2019, 10 p.m. 16.0 ppb (15) 2.0 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.01 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 17, 2019, 9 p.m. 13.0 ppb (12) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A 0.02 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 17, 2019, 8 p.m. 13.0 ppb (12) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.0 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 17, 2019, 7 p.m. 17.0 ppb (16) 2.0 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.02 ppb (0) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 17, 2019, 6 p.m. 16.0 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Nov. 17, 2019, 5 p.m. 14.0 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.02 ppb (0) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 17, 2019, 4 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.03 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Nov. 17, 2019, 3 p.m. 17.0 ppb (16) 3.0 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A 0.03 ppb (0) N/A 4.0 μg/m3 (17) 17.0
 
Nov. 17, 2019, 2 p.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.03 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 17, 2019, 1 p.m. 15.0 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.01 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 17, 2019, noon 12.0 ppb (11) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 17, 2019, 11 a.m. 12.0 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Nov. 17, 2019, 10 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 17, 2019, 9 a.m. 11.0 ppb (10) -1.0 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 17, 2019, 8 a.m. 14.0 ppb (13) 0.0 ppb (0) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 17, 2019, 7 a.m. 10.0 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Nov. 17, 2019, 6 a.m. 8.0 ppb (7) -1.0 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 17, 2019, 5 a.m. 15.0 ppb (14) 0.0 ppb (0) N/A 15.0 ppb (14) N/A N/A N/A 0.03 ppb (0) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 17, 2019, 4 a.m. 27.0 ppb (25) 4.0 ppb (4) N/A 23.0 ppb (21) N/A N/A N/A 0.08 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Nov. 17, 2019, 3 a.m. 32.0 ppb (30) 7.0 ppb (6) N/A 25.0 ppb (23) N/A N/A N/A 0.13 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 17, 2019, 2 a.m. 36.0 ppb (33) 8.0 ppb (7) N/A 27.0 ppb (25) N/A N/A N/A 0.12 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 17, 2019, 1 a.m. 34.0 ppb (31) 8.0 ppb (7) N/A 26.0 ppb (24) N/A N/A N/A 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 17, 2019, midnight 20.0 ppb (19) 2.0 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.08 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 16, 2019, 11 p.m. 15.0 ppb (14) 2.0 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.05 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Nov. 16, 2019, 10 p.m. 21.0 ppb (19) 4.0 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.06 ppb (1) N/A 1.0 μg/m3 (4) 19.0
 
Nov. 16, 2019, 9 p.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.06 ppb (1) N/A -1.0 μg/m3 (0) 19.0
 
Nov. 16, 2019, 8 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.04 ppb (0) N/A 3.0 μg/m3 (12) 15.0
 
Nov. 16, 2019, 7 p.m. 19.0 ppb (18) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.05 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 16, 2019, 6 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.05 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 16, 2019, 5 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.01 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Nov. 16, 2019, 4 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Nov. 16, 2019, 3 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.0 ppb (0) N/A 3.0 μg/m3 (12) 12.0
 
Nov. 16, 2019, 2 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.02 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 16, 2019, 1 p.m. 27.0 ppb (25) 11.0 ppb (10) N/A 16.0 ppb (15) N/A N/A N/A 0.05 ppb (1) N/A 4.0 μg/m3 (17) 25.0
 
Nov. 16, 2019, noon 28.0 ppb (26) 10.0 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.06 ppb (1) N/A 6.0 μg/m3 (25) 26.0
 
Nov. 16, 2019, 11 a.m. 23.0 ppb (21) 6.0 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.05 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Nov. 16, 2019, 10 a.m. 15.0 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A 0.0 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Nov. 16, 2019, 9 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 11.0
 
Nov. 16, 2019, 8 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 16, 2019, 7 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Nov. 16, 2019, 6 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Nov. 16, 2019, 5 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.05 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Nov. 16, 2019, 4 a.m. 19.0 ppb (18) 4.0 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Nov. 16, 2019, 3 a.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Nov. 16, 2019, 2 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.09 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Nov. 16, 2019, 1 a.m. 21.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 16, 2019, midnight 38.0 ppb (35) 10.0 ppb (9) N/A 29.0 ppb (27) N/A N/A N/A 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Nov. 15, 2019, 11 p.m. 45.0 ppb (42) 14.0 ppb (13) N/A 31.0 ppb (29) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 42.0
 
Nov. 15, 2019, 10 p.m. 35.0 ppb (32) 10.0 ppb (9) N/A 24.0 ppb (22) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
Nov. 15, 2019, 9 p.m. 31.0 ppb (29) 10.0 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 29.0
 
Nov. 15, 2019, 8 p.m. 28.0 ppb (26) 10.0 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A 0.12 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Nov. 15, 2019, 7 p.m. 33.0 ppb (31) 14.0 ppb (13) N/A 19.0 ppb (18) N/A N/A N/A 0.1 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Nov. 15, 2019, 6 p.m. 22.0 ppb (20) 8.0 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.06 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Nov. 15, 2019, 5 p.m. 32.0 ppb (30) 15.0 ppb (14) N/A 17.0 ppb (16) N/A N/A N/A 0.07 ppb (1) N/A 6.0 μg/m3 (25) 30.0
 
Nov. 15, 2019, 4 p.m. 39.0 ppb (36) 20.0 ppb (19) N/A 19.0 ppb (18) N/A N/A N/A 0.11 ppb (1) N/A N/A 36.0
 
Nov. 15, 2019, 3 p.m. 47.0 ppb (44) 25.0 ppb (23) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A N/A 44.0
 
Nov. 15, 2019, 2 p.m. 58.0 ppb (54) 34.0 ppb (31) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A N/A 54.0
 
Nov. 15, 2019, 1 p.m. 70.0 ppb (67) 41.0 ppb (38) N/A 28.0 ppb (26) N/A N/A N/A 0.31 ppb (3) N/A N/A 67.0
 
Nov. 15, 2019, noon 89.0 ppb (87) 56.0 ppb (52) N/A 34.0 ppb (31) N/A N/A N/A 0.41 ppb (5) N/A N/A 87.0
 
Nov. 15, 2019, 11 a.m. 118.0 ppb (103) 80.0 ppb (78) N/A 38.0 ppb (35) N/A N/A N/A 0.53 ppb (6) N/A N/A 103.0
 
Nov. 15, 2019, 10 a.m. 72.0 ppb (69) 38.0 ppb (35) N/A 33.0 ppb (31) N/A N/A N/A N/A N/A N/A 69.0
 
Nov. 15, 2019, 9 a.m. 46.0 ppb (43) 16.0 ppb (15) N/A 30.0 ppb (28) N/A N/A N/A 0.17 ppb (2) N/A N/A 43.0
 
Nov. 15, 2019, 8 a.m. 35.0 ppb (32) 9.0 ppb (8) N/A 26.0 ppb (24) N/A N/A N/A 0.13 ppb (1) N/A N/A 32.0
 
Nov. 15, 2019, 7 a.m. 41.0 ppb (38) 12.0 ppb (11) N/A 29.0 ppb (27) N/A N/A N/A 0.2 ppb (2) N/A N/A 38.0
 
Nov. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.2 ppb (2) N/A N/A 2.0
 
Nov. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.28 ppb (3) N/A N/A 3.0
 
Nov. 15, 2019, 4 a.m. 58.0 ppb (54) 23.0 ppb (21) N/A 35.0 ppb (32) N/A N/A N/A 0.44 ppb (5) N/A N/A 54.0
 
Nov. 15, 2019, 3 a.m. 76.0 ppb (73) 39.0 ppb (36) N/A 36.0 ppb (33) N/A N/A N/A 0.45 ppb (5) N/A N/A 73.0
 
Nov. 15, 2019, 2 a.m. 81.0 ppb (79) 45.0 ppb (42) N/A 37.0 ppb (34) N/A N/A N/A 0.49 ppb (5) N/A N/A 79.0
 
Nov. 15, 2019, 1 a.m. 55.0 ppb (51) 22.0 ppb (20) N/A 34.0 ppb (31) N/A N/A N/A 0.32 ppb (4) N/A N/A 51.0