ID: 2256

AQSQID: 250250044

Site Name: Boston-Von Hillern

Added: April 21, 2020, 6:24 p.m.

Updated: Sept. 26, 2020, 1:40 a.m.

Location: Boston (S Boston), MA

Reporting: True, Located: True

Current AQI: 46.0

Boston (S Boston) MA, US: 42.325197, -71.056056

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 25, 2020, 11 p.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.08 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 10 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.02 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2020, 9 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.04 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2020, 8 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.03 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 25, 2020, 7 p.m. 15.0 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.09 ppb (1) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 25, 2020, 6 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.11 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 25, 2020, 5 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.09 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 25, 2020, 4 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.15 ppb (2) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 25, 2020, 3 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.13 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 25, 2020, 2 p.m. 29.0 ppb (27) 10.0 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.18 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 25, 2020, 1 p.m. 32.0 ppb (30) 12.0 ppb (11) N/A 20.0 ppb (19) N/A N/A N/A 0.21 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 25, 2020, noon 48.0 ppb (44) 23.0 ppb (21) N/A 25.0 ppb (23) N/A N/A N/A 0.28 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 25, 2020, 11 a.m. 101.0 ppb (100) 66.0 ppb (63) N/A 35.0 ppb (32) N/A N/A N/A 0.68 ppb (8) N/A 25.0 μg/m3 (78) 100.0
 
Sept. 25, 2020, 10 a.m. 75.0 ppb (72) 43.0 ppb (40) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 26.0 μg/m3 (80) 80.0
 
Sept. 25, 2020, 9 a.m. 38.0 ppb (35) 15.0 ppb (14) N/A 23.0 ppb (21) N/A N/A N/A 0.35 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 25, 2020, 8 a.m. 28.0 ppb (26) 8.0 ppb (7) N/A 20.0 ppb (19) N/A N/A N/A 0.28 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 25, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.25 ppb (3) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 25, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.25 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Sept. 25, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.25 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 25, 2020, 4 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A 21.0 μg/m3 (69) 69.0
 
Sept. 25, 2020, 3 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.31 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 25, 2020, 2 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 25, 2020, 1 a.m. 20.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 25, 2020, midnight 24.0 ppb (22) 3.0 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A 0.42 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 24, 2020, 11 p.m. 27.0 ppb (25) 6.0 ppb (6) N/A 22.0 ppb (20) N/A N/A N/A 0.41 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 24, 2020, 10 p.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.36 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 9 p.m. 15.0 ppb (14) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 24, 2020, 8 p.m. 17.0 ppb (16) 5.0 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 7 p.m. 19.0 ppb (18) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 24, 2020, 6 p.m. 21.0 ppb (19) 8.0 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 5 p.m. 21.0 ppb (19) 8.0 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.19 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 24, 2020, 4 p.m. 19.0 ppb (18) 8.0 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.18 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 24, 2020, 3 p.m. 23.0 ppb (21) 10.0 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A 0.17 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 24, 2020, 2 p.m. 30.0 ppb (28) 14.0 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.25 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 24, 2020, 1 p.m. 46.0 ppb (43) 24.0 ppb (22) N/A 22.0 ppb (20) N/A N/A N/A 0.26 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 24, 2020, noon 44.0 ppb (41) 22.0 ppb (20) N/A 22.0 ppb (20) N/A N/A N/A 0.32 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 24, 2020, 11 a.m. 62.0 ppb (59) 35.0 ppb (32) N/A 27.0 ppb (25) N/A N/A N/A 0.43 ppb (5) N/A 14.0 μg/m3 (54) 59.0
 
Sept. 24, 2020, 10 a.m. 65.0 ppb (62) 37.0 ppb (34) N/A 28.0 ppb (26) N/A N/A N/A 0.41 ppb (5) N/A 17.0 μg/m3 (61) 62.0
 
Sept. 24, 2020, 9 a.m. 39.0 ppb (36) 16.0 ppb (15) N/A 22.0 ppb (20) N/A N/A N/A 0.28 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 24, 2020, 8 a.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.12 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 7 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.1 ppb (1) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 24, 2020, 6 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.09 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 5 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.12 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 24, 2020, 4 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.15 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 24, 2020, 3 a.m. 15.0 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 2 a.m. 18.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.41 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 24, 2020, 1 a.m. 33.0 ppb (31) 9.0 ppb (8) N/A 24.0 ppb (22) N/A N/A N/A 0.64 ppb (7) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 24, 2020, midnight 31.0 ppb (29) 7.0 ppb (6) N/A 24.0 ppb (22) N/A N/A N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 11 p.m. 19.0 ppb (18) 5.0 ppb (5) N/A 15.0 ppb (14) N/A N/A N/A 0.34 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 23, 2020, 10 p.m. 18.0 ppb (17) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 9 p.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 23, 2020, 8 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.16 ppb (2) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 23, 2020, 7 p.m. 17.0 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2020, 6 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.13 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 5 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.13 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 23, 2020, 4 p.m. 18.0 ppb (17) 7.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.12 ppb (1) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 23, 2020, 3 p.m. 18.0 ppb (17) 7.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.07 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 2 p.m. 20.0 ppb (19) 8.0 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.08 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2020, 1 p.m. 29.0 ppb (27) 14.0 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.09 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, noon 33.0 ppb (31) 15.0 ppb (14) N/A 18.0 ppb (17) N/A N/A N/A 0.11 ppb (1) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 23, 2020, 11 a.m. 49.0 ppb (45) 25.0 ppb (23) N/A 24.0 ppb (22) N/A N/A N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 45.0
 
Sept. 23, 2020, 10 a.m. 40.0 ppb (37) 19.0 ppb (18) N/A 21.0 ppb (19) N/A N/A N/A 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 9 a.m. 24.0 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A N/A 0.07 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 8 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 7 a.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 6 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 5 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 4 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.02 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 23, 2020, 3 a.m. 11.0 ppb (10) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.07 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, 2 a.m. 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.09 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 1 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.08 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, midnight 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.09 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2020, 11 p.m. 17.0 ppb (16) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 16.0
 
Sept. 22, 2020, 10 p.m. 21.0 ppb (19) 6.0 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 22, 2020, 9 p.m. 27.0 ppb (25) 9.0 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.07 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 22, 2020, 8 p.m. 22.0 ppb (20) 7.0 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.05 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 22, 2020, 7 p.m. 25.0 ppb (23) 10.0 ppb (9) N/A 15.0 ppb (14) N/A N/A N/A 0.08 ppb (1) N/A 3.0 μg/m3 (12) 23.0
 
Sept. 22, 2020, 6 p.m. 23.0 ppb (21) 9.0 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.05 ppb (1) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 22, 2020, 5 p.m. 20.0 ppb (19) 9.0 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A N/A 19.0
 
Sept. 22, 2020, 4 p.m. 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2020, 3 p.m. 34.0 ppb (31) 17.0 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A 0.06 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2020, 2 p.m. 46.0 ppb (43) 26.0 ppb (24) N/A 20.0 ppb (19) N/A N/A N/A 0.1 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2020, 1 p.m. 57.0 ppb (53) 34.0 ppb (31) N/A 23.0 ppb (21) N/A N/A N/A 0.1 ppb (1) N/A 11.0 μg/m3 (46) 53.0
 
Sept. 22, 2020, noon 74.0 ppb (71) 48.0 ppb (44) N/A 26.0 ppb (24) N/A N/A N/A 0.17 ppb (2) N/A 19.0 μg/m3 (65) 71.0
 
Sept. 22, 2020, 11 a.m. 66.0 ppb (63) 41.0 ppb (38) N/A 26.0 ppb (24) N/A N/A N/A 0.2 ppb (2) N/A 16.0 μg/m3 (59) 63.0
 
Sept. 22, 2020, 10 a.m. 70.0 ppb (67) 44.0 ppb (41) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 67.0
 
Sept. 22, 2020, 9 a.m. 50.0 ppb (46) 27.0 ppb (25) N/A 23.0 ppb (21) N/A N/A N/A 0.15 ppb (2) N/A 10.0 μg/m3 (42) 46.0
 
Sept. 22, 2020, 8 a.m. 31.0 ppb (29) 11.0 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.08 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.08 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.07 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.11 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, 4 a.m. 35.0 ppb (32) 11.0 ppb (10) N/A 24.0 ppb (22) N/A N/A N/A 0.11 ppb (1) N/A 7.0 μg/m3 (29) 32.0
 
Sept. 22, 2020, 3 a.m. 59.0 ppb (55) 30.0 ppb (28) N/A 29.0 ppb (27) N/A N/A N/A 0.11 ppb (1) N/A 9.0 μg/m3 (38) 55.0
 
Sept. 22, 2020, 2 a.m. 41.0 ppb (38) 13.0 ppb (12) N/A 28.0 ppb (26) N/A N/A N/A 0.14 ppb (2) N/A 8.0 μg/m3 (33) 38.0
 
Sept. 22, 2020, 1 a.m. 23.0 ppb (21) 5.0 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2020, midnight 16.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 15.0
 
Sept. 21, 2020, 11 p.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 0.0 μg/m3 (0) 7.0
 
Sept. 21, 2020, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 8 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2020, 6 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 5 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 4 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2020, 2 p.m. 9.0 ppb (8) 5.0 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2020, 1 p.m. 19.0 ppb (18) 9.0 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.03 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2020, noon 47.0 ppb (44) 28.0 ppb (26) N/A 19.0 ppb (18) N/A N/A N/A 0.08 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2020, 11 a.m. 47.0 ppb (44) 26.0 ppb (24) N/A 21.0 ppb (19) N/A N/A N/A 0.11 ppb (1) N/A 10.0 μg/m3 (42) 44.0
 
Sept. 21, 2020, 10 a.m. 27.0 ppb (25) 10.0 ppb (9) N/A 17.0 ppb (16) N/A N/A N/A 0.03 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 9 a.m. 54.0 ppb (50) 31.0 ppb (29) N/A 23.0 ppb (21) N/A N/A N/A 0.22 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2020, 8 a.m. 56.0 ppb (52) 30.0 ppb (28) N/A 26.0 ppb (24) N/A N/A N/A 0.16 ppb (2) N/A 9.0 μg/m3 (38) 52.0
 
Sept. 21, 2020, 7 a.m. 34.0 ppb (31) 13.0 ppb (12) N/A 21.0 ppb (19) N/A N/A N/A 0.05 ppb (1) N/A 7.0 μg/m3 (29) 31.0
 
Sept. 21, 2020, 6 a.m. 29.0 ppb (27) 9.0 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.04 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 5 a.m. 54.0 ppb (50) 26.0 ppb (24) N/A 28.0 ppb (26) N/A N/A N/A 0.06 ppb (1) N/A 9.0 μg/m3 (38) 50.0
 
Sept. 21, 2020, 4 a.m. 52.0 ppb (48) 24.0 ppb (22) N/A 28.0 ppb (26) N/A N/A N/A 0.15 ppb (2) N/A 9.0 μg/m3 (38) 48.0
 
Sept. 21, 2020, 3 a.m. 25.0 ppb (23) 7.0 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 2 a.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.13 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 1 a.m. 21.0 ppb (19) 5.0 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A 0.14 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 21, 2020, midnight 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 7.0
 
Sept. 20, 2020, 11 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A -4.0 μg/m3 (0) 6.0
 
Sept. 20, 2020, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 3.0
 
Sept. 20, 2020, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, 8 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2020, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2020, 6 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2020, 5 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2020, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 3 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2020, 2 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2020, 1 p.m. 8.0 ppb (7) 4.0 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Sept. 20, 2020, noon 11.0 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2020, 11 a.m. 11.0 ppb (10) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, 10 a.m. 15.0 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 9 a.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, 8 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 7 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2020, 6 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2020, 5 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 4 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2020, 3 a.m. 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.02 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2020, 2 a.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.05 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 1 a.m. 35.0 ppb (32) 12.0 ppb (11) N/A 23.0 ppb (21) N/A N/A N/A 0.48 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 20, 2020, midnight 25.0 ppb (23) 9.0 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 19, 2020, 11 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 10 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 8 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2020, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2020, 6 p.m. 5.0 ppb (5) 3.0 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 4 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 3 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 2 p.m. 9.0 ppb (8) 5.0 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2020, 1 p.m. 11.0 ppb (10) 6.0 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2020, noon 29.0 ppb (27) 15.0 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A 0.04 ppb (0) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 11 a.m. 24.0 ppb (22) 11.0 ppb (10) N/A 12.0 ppb (11) N/A N/A N/A 0.04 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2020, 10 a.m. 21.0 ppb (19) 8.0 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2020, 9 a.m. 28.0 ppb (26) 12.0 ppb (11) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2020, 8 a.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2020, 4 a.m. 13.0 ppb (12) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 19, 2020, 3 a.m. 16.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.03 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2020, 2 a.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.0 ppb (0) N/A 3.0 μg/m3 (12) 13.0
 
Sept. 19, 2020, 1 a.m. 17.0 ppb (16) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.05 ppb (1) N/A 2.0 μg/m3 (8) 16.0
 
Sept. 19, 2020, midnight 20.0 ppb (19) 5.0 ppb (5) N/A 15.0 ppb (14) N/A N/A N/A 0.08 ppb (1) N/A 4.0 μg/m3 (17) 19.0