ID: 2256

AQSQID: 250250044

Site Name: Boston-Von Hillern

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

Updated: July 9, 2020, 11:34 p.m.

Location: Boston (S Boston), MA

Reporting: True, Located: True

Current AQI: 42.0

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
July 9, 2020, 10 p.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 10.0 μg/m3 (42) 42.0
 
July 9, 2020, 9 p.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 17.0 μg/m3 (61) 61.0
 
July 9, 2020, 8 p.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 14.0 μg/m3 (54) 54.0
 
July 9, 2020, 7 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
July 9, 2020, 6 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
July 9, 2020, 5 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 20.0 μg/m3 (67) 67.0
 
July 9, 2020, 4 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
July 9, 2020, 3 p.m. 15.0 ppb (14) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 21.0 μg/m3 (69) 69.0
 
July 9, 2020, 2 p.m. 17.0 ppb (16) 6.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A 0.39 ppb (4) N/A 22.0 μg/m3 (71) 71.0
 
July 9, 2020, 1 p.m. 17.0 ppb (16) 6.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.36 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
July 9, 2020, noon 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
July 9, 2020, 11 a.m. 24.0 ppb (22) 13.0 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
July 9, 2020, 10 a.m. 30.0 ppb (28) 17.0 ppb (16) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
July 9, 2020, 9 a.m. 17.0 ppb (16) 8.0 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 9, 2020, 8 a.m. 13.0 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 9, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
July 9, 2020, 4 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.31 ppb (3) N/A N/A 9.0
 
July 9, 2020, 3 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 9, 2020, 2 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 9, 2020, 1 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 9, 2020, midnight 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 8, 2020, 11 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 10 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 9 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 8, 2020, 8 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 8, 2020, 7 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 6 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.37 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
July 8, 2020, 5 p.m. 14.0 ppb (13) 6.0 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.33 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
July 8, 2020, 4 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 18.0 μg/m3 (63) 63.0
 
July 8, 2020, 3 p.m. 17.0 ppb (16) 7.0 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.36 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
July 8, 2020, 2 p.m. 18.0 ppb (17) 8.0 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.38 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
July 8, 2020, 1 p.m. 18.0 ppb (17) 9.0 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A 0.37 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 8, 2020, noon 16.0 ppb (15) 8.0 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.36 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 8, 2020, 11 a.m. 22.0 ppb (20) 13.0 ppb (12) N/A 10.0 ppb (9) N/A N/A N/A 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 10 a.m. 22.0 ppb (20) 12.0 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
July 8, 2020, 9 a.m. 16.0 ppb (15) 8.0 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 8, 2020, 8 a.m. 7.0 ppb (6) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 8, 2020, 7 a.m. 7.0 ppb (6) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.14 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
July 8, 2020, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 8, 2020, 5 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
July 8, 2020, 4 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 8, 2020, 3 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 8, 2020, 2 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 8, 2020, 1 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 8, 2020, midnight 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 11 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 10 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 9 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 7, 2020, 8 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 7 p.m. 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 7, 2020, 6 p.m. 20.0 ppb (19) 8.0 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 5 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 4 p.m. 19.0 ppb (18) 8.0 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 3 p.m. 18.0 ppb (17) 8.0 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 17.0
 
July 7, 2020, 2 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
July 7, 2020, 1 p.m. 14.0 ppb (13) 8.0 ppb (7) N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, noon 18.0 ppb (17) 9.0 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 7, 2020, 6 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 5 a.m. 10.0 ppb (9) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 4 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 3 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 2 a.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 1 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 6, 2020, 11 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 6, 2020, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 6, 2020, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 6, 2020, 8 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 3.0 μg/m3 (12) 12.0
 
July 6, 2020, 7 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 4.0 μg/m3 (17) 17.0
 
July 6, 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 7.0 μg/m3 (29) 29.0
 
July 6, 2020, 5 p.m. 2.0 ppb (2) 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
 
July 6, 2020, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
July 6, 2020, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 6, 2020, 2 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
July 6, 2020, 1 p.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 6.0 μg/m3 (25) 25.0
 
July 6, 2020, noon 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 6, 2020, 11 a.m. 31.0 ppb (29) 14.0 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
July 6, 2020, 10 a.m. 43.0 ppb (40) 21.0 ppb (19) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 40.0
 
July 6, 2020, 9 a.m. 25.0 ppb (23) 7.0 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.01 ppb (0) N/A 3.0 μg/m3 (12) 23.0
 
July 6, 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 3.0 μg/m3 (12) 14.0
 
July 6, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 6, 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
 
July 6, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
July 6, 2020, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
July 6, 2020, 3 a.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
July 6, 2020, 2 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.06 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
July 6, 2020, 1 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
July 6, 2020, midnight 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.14 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 5, 2020, 11 p.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
July 5, 2020, 10 p.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.07 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
July 5, 2020, 9 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.03 ppb (0) N/A 13.0 μg/m3 (52) 52.0
 
July 5, 2020, 8 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.02 ppb (0) N/A 17.0 μg/m3 (61) 61.0
 
July 5, 2020, 7 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.07 ppb (1) N/A 19.0 μg/m3 (65) 65.0
 
July 5, 2020, 6 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.09 ppb (1) N/A 16.0 μg/m3 (59) 59.0
 
July 5, 2020, 5 p.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.16 ppb (2) N/A 28.0 μg/m3 (84) 84.0
 
July 5, 2020, 4 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.06 ppb (1) N/A 20.0 μg/m3 (67) 67.0
 
July 5, 2020, 3 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.06 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
July 5, 2020, 2 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.07 ppb (1) N/A 16.0 μg/m3 (59) 59.0
 
July 5, 2020, 1 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.07 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
July 5, 2020, noon 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.01 ppb (0) N/A 14.0 μg/m3 (54) 54.0
 
July 5, 2020, 11 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.02 ppb (0) N/A 15.0 μg/m3 (56) 56.0
 
July 5, 2020, 10 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.01 ppb (0) N/A 16.0 μg/m3 (59) 59.0
 
July 5, 2020, 9 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.03 ppb (0) N/A 23.0 μg/m3 (73) 73.0
 
July 5, 2020, 8 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.04 ppb (0) N/A 22.0 μg/m3 (71) 71.0
 
July 5, 2020, 7 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.17 ppb (2) N/A 42.0 μg/m3 (116) 116.0
 
July 5, 2020, 6 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.19 ppb (2) N/A 62.0 μg/m3 (153) 153.0
 
July 5, 2020, 5 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A 63.0 μg/m3 (154) 154.0
 
July 5, 2020, 4 a.m. 12.0 ppb (11) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 103.0 μg/m3 (175) 175.0
 
July 5, 2020, 3 a.m. 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.3 ppb (3) N/A 50.0 μg/m3 (136) 136.0
 
July 5, 2020, 2 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A 30.0 μg/m3 (88) 88.0
 
July 5, 2020, 1 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A 0.12 ppb (1) N/A 50.0 μg/m3 (136) 136.0
 
July 5, 2020, midnight 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
July 4, 2020, 11 p.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
 
July 4, 2020, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
July 4, 2020, 9 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
July 4, 2020, 8 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
 
July 4, 2020, 7 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 7.0 μg/m3 (29) 29.0
 
July 4, 2020, 6 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 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 5 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 7.0 μg/m3 (29) 29.0
 
July 4, 2020, 4 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 11.0 μg/m3 (46) 46.0
 
July 4, 2020, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 4, 2020, 2 p.m. 5.0 ppb (5) 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
 
July 4, 2020, 1 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
July 4, 2020, noon 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
July 4, 2020, 11 a.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 4.0 μg/m3 (17) 17.0
 
July 4, 2020, 10 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
July 4, 2020, 9 a.m. 3.0 ppb (3) 0.0 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
 
July 4, 2020, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
July 4, 2020, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, 6 a.m. 3.0 ppb (3) 0.0 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
 
July 4, 2020, 5 a.m. 2.0 ppb (2) 0.0 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
 
July 4, 2020, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 4, 2020, 3 a.m. 4.0 ppb (4) 0.0 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
 
July 4, 2020, 2 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 10.0 μg/m3 (42) 42.0
 
July 4, 2020, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
July 4, 2020, midnight 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 3, 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 11.0 μg/m3 (46) 46.0
 
July 3, 2020, 10 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 3, 2020, 9 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
July 3, 2020, 8 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 8.0 μg/m3 (33) 33.0
 
July 3, 2020, 7 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 8.0 μg/m3 (33) 33.0
 
July 3, 2020, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
July 3, 2020, 4 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 2.0 μg/m3 (8) 8.0
 
July 3, 2020, 3 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
 
July 3, 2020, 2 p.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 6.0 μg/m3 (25) 25.0
 
July 3, 2020, 1 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 (17) 17.0
 
July 3, 2020, noon 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
 
July 3, 2020, 11 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 10.0 μg/m3 (42) 42.0
 
July 3, 2020, 10 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 15.0 μg/m3 (56) 56.0
 
July 3, 2020, 9 a.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
July 3, 2020, 8 a.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
July 3, 2020, 6 a.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
 
July 3, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.06 ppb (1) N/A 14.0 μg/m3 (54) 54.0
 
July 3, 2020, 4 a.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.15 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
July 3, 2020, 3 a.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 3, 2020, 2 a.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.17 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
July 3, 2020, 1 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 7.0 μg/m3 (29) 29.0
 
July 3, 2020, midnight 14.0 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 2, 2020, 11 p.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.16 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 2, 2020, 10 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.09 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 9 p.m. 13.0 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.09 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 8 p.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.1 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 7 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.03 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
July 2, 2020, 6 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 16.0 μg/m3 (59) 59.0
 
July 2, 2020, 5 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.0 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 4 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.0 ppb (0) N/A 11.0 μg/m3 (46) 46.0