ID: 2256

AQSQID: 250250044

Site Name: Boston-Von Hillern

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

Updated: Oct. 16, 2021, 3:04 p.m.

Location: Boston (S Boston), MA

Reporting: True, Located: True

Current AQI: 13.0

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
Oct. 16, 2021, noon 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 16, 2021, 11 a.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 16, 2021, 10 a.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 9 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 16, 2021, 8 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 16, 2021, 7 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 16, 2021, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 16, 2021, 5 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 16, 2021, 4 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 16, 2021, 3 a.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 16, 2021, 2 a.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 16, 2021, 1 a.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 16, 2021, midnight 9.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 15, 2021, 11 p.m. 13.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 15, 2021, 10 p.m. 12.0 ppb (12) 3.0 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 9 p.m. 14.0 ppb (14) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 8 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 6 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 15, 2021, 5 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 15, 2021, 4 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 15, 2021, 3 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 15, 2021, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 15, 2021, 1 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 15, 2021, noon 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 15, 2021, 11 a.m. 11.0 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 15, 2021, 10 a.m. 19.0 ppb (18) 11.0 ppb (11) N/A 8.0 ppb (8) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 15, 2021, 9 a.m. 16.0 ppb (16) 8.0 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 15, 2021, 8 a.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 15, 2021, 7 a.m. 14.0 ppb (14) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 6 a.m. 13.0 ppb (13) 1.0 ppb (1) N/A 12.0 ppb (12) N/A N/A N/A 0.37 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 15, 2021, 5 a.m. 40.0 ppb (38) 18.0 ppb (17) N/A 22.0 ppb (21) N/A N/A N/A 0.64 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Oct. 15, 2021, 4 a.m. 42.0 ppb (40) 17.0 ppb (17) N/A 25.0 ppb (24) N/A N/A N/A 0.76 ppb (10) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 15, 2021, 3 a.m. 45.0 ppb (43) 20.0 ppb (19) N/A 25.0 ppb (24) N/A N/A N/A 0.8 ppb (10) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 15, 2021, 2 a.m. 39.0 ppb (37) 12.0 ppb (12) N/A 27.0 ppb (26) N/A N/A N/A 0.74 ppb (8) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 15, 2021, 1 a.m. 48.0 ppb (46) 19.0 ppb (18) N/A 29.0 ppb (28) N/A N/A N/A 0.94 ppb (11) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 15, 2021, midnight 58.0 ppb (56) 27.0 ppb (26) N/A 30.0 ppb (29) N/A N/A N/A 0.95 ppb (11) N/A 14.0 μg/m3 (55) 56.0
 
Oct. 14, 2021, 11 p.m. 37.0 ppb (35) 13.0 ppb (13) N/A 25.0 ppb (24) N/A N/A N/A 0.69 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 14, 2021, 10 p.m. 13.0 ppb (13) 1.0 ppb (1) N/A 12.0 ppb (12) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 9 p.m. 8.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 14, 2021, 8 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, 7 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (4) N/A N/A 5.0
 
Oct. 14, 2021, 6 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 5 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 14, 2021, 4 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 3 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 2 p.m. 30.0 ppb (29) 16.0 ppb (16) N/A 14.0 ppb (14) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, 1 p.m. 42.0 ppb (40) 25.0 ppb (24) N/A 16.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 40.0
 
Oct. 14, 2021, noon 52.0 ppb (50) 35.0 ppb (34) N/A 17.0 ppb (17) N/A N/A N/A 0.48 ppb (6) N/A N/A 50.0
 
Oct. 14, 2021, 11 a.m. 58.0 ppb (56) 42.0 ppb (40) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 56.0
 
Oct. 14, 2021, 10 a.m. 74.0 ppb (73) 59.0 ppb (57) N/A 15.0 ppb (15) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 73.0
 
Oct. 14, 2021, 9 a.m. 35.0 ppb (34) 24.0 ppb (23) N/A 11.0 ppb (11) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 34.0
 
Oct. 14, 2021, 8 a.m. 25.0 ppb (24) 14.0 ppb (14) N/A 11.0 ppb (11) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.45 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 14, 2021, 4 a.m. 14.0 ppb (14) 4.0 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 14, 2021, 3 a.m. 17.0 ppb (17) 5.0 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.5 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, 2 a.m. 18.0 ppb (17) 3.0 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.55 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 14, 2021, 1 a.m. 22.0 ppb (21) 4.0 ppb (4) N/A 17.0 ppb (17) N/A N/A N/A 0.47 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, midnight 21.0 ppb (20) 4.0 ppb (4) N/A 17.0 ppb (17) N/A N/A N/A 0.55 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 13, 2021, 11 p.m. 21.0 ppb (20) 4.0 ppb (4) N/A 17.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 13, 2021, 10 p.m. 24.0 ppb (23) 5.0 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 13, 2021, 9 p.m. 17.0 ppb (17) 3.0 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 13, 2021, 8 p.m. 16.0 ppb (16) 4.0 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.37 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 13, 2021, 7 p.m. 13.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 6 p.m. 15.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 13, 2021, 5 p.m. 19.0 ppb (18) 7.0 ppb (7) N/A 12.0 ppb (12) N/A N/A N/A 0.39 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 13, 2021, 4 p.m. 22.0 ppb (21) 9.0 ppb (9) N/A 12.0 ppb (12) N/A N/A N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 13, 2021, 3 p.m. 26.0 ppb (25) 12.0 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 13, 2021, 2 p.m. 34.0 ppb (33) 18.0 ppb (17) N/A 17.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 13, 2021, 1 p.m. 51.0 ppb (49) 30.0 ppb (29) N/A 20.0 ppb (19) N/A N/A N/A 0.55 ppb (7) N/A 9.0 μg/m3 (38) 49.0
 
Oct. 13, 2021, noon 44.0 ppb (42) 26.0 ppb (25) N/A 19.0 ppb (18) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (34) 42.0
 
Oct. 13, 2021, 11 a.m. 59.0 ppb (57) 40.0 ppb (38) N/A 19.0 ppb (18) N/A N/A N/A 0.62 ppb (7) N/A 10.0 μg/m3 (42) 57.0
 
Oct. 13, 2021, 10 a.m. 62.0 ppb (60) 45.0 ppb (43) N/A 18.0 ppb (17) N/A N/A N/A 0.65 ppb (8) N/A 8.0 μg/m3 (34) 60.0
 
Oct. 13, 2021, 9 a.m. 37.0 ppb (35) 23.0 ppb (22) N/A 14.0 ppb (14) N/A N/A N/A 0.52 ppb (6) N/A 6.0 μg/m3 (25) 35.0
 
Oct. 13, 2021, 8 a.m. 24.0 ppb (23) 12.0 ppb (12) N/A 11.0 ppb (11) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 7 a.m. 16.0 ppb (16) 6.0 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.36 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 13, 2021, 6 a.m. 12.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 13, 2021, 5 a.m. 14.0 ppb (14) 4.0 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 13, 2021, 4 a.m. 15.0 ppb (15) 4.0 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.48 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 13, 2021, 3 a.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (13) N/A N/A N/A 0.53 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 13, 2021, 2 a.m. 27.0 ppb (26) 7.0 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.75 ppb (10) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 13, 2021, 1 a.m. 35.0 ppb (34) 9.0 ppb (9) N/A 26.0 ppb (25) N/A N/A N/A 0.62 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 13, 2021, midnight 47.0 ppb (45) 15.0 ppb (15) N/A 32.0 ppb (31) N/A N/A N/A 0.71 ppb (8) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 12, 2021, 11 p.m. 32.0 ppb (31) 7.0 ppb (7) N/A 24.0 ppb (23) N/A N/A N/A 0.55 ppb (7) N/A 5.0 μg/m3 (21) 31.0
 
Oct. 12, 2021, 10 p.m. 20.0 ppb (19) 5.0 ppb (5) N/A 15.0 ppb (15) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 12, 2021, 9 p.m. 13.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 12, 2021, 8 p.m. 13.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 12, 2021, 7 p.m. 17.0 ppb (17) 6.0 ppb (6) N/A 11.0 ppb (11) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 12, 2021, 6 p.m. 16.0 ppb (16) 6.0 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 12, 2021, 5 p.m. 21.0 ppb (20) 8.0 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.4 ppb (5) N/A 4.0 μg/m3 (17) 20.0
 
Oct. 12, 2021, 4 p.m. 23.0 ppb (22) 10.0 ppb (10) N/A 13.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 22.0
 
Oct. 12, 2021, 3 p.m. 39.0 ppb (37) 20.0 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 37.0
 
Oct. 12, 2021, 2 p.m. 42.0 ppb (40) 25.0 ppb (24) N/A 17.0 ppb (17) N/A N/A N/A 0.55 ppb (7) N/A 7.0 μg/m3 (30) 40.0
 
Oct. 12, 2021, 1 p.m. 76.0 ppb (75) 55.0 ppb (53) N/A 21.0 ppb (20) N/A N/A N/A 0.69 ppb (8) N/A 11.0 μg/m3 (46) 75.0
 
Oct. 12, 2021, noon 90.0 ppb (90) 70.0 ppb (69) N/A 20.0 ppb (19) N/A N/A N/A 0.8 ppb (10) N/A 9.0 μg/m3 (38) 90.0
 
Oct. 12, 2021, 11 a.m. 74.0 ppb (73) 59.0 ppb (57) N/A 15.0 ppb (15) N/A N/A N/A 0.69 ppb (8) N/A 7.0 μg/m3 (30) 73.0
 
Oct. 12, 2021, 10 a.m. 66.0 ppb (64) 52.0 ppb (50) N/A 14.0 ppb (14) N/A N/A N/A 0.66 ppb (8) N/A 7.0 μg/m3 (30) 64.0
 
Oct. 12, 2021, 9 a.m. 46.0 ppb (44) 31.0 ppb (30) N/A 16.0 ppb (16) N/A N/A N/A 0.56 ppb (7) N/A 6.0 μg/m3 (25) 44.0
 
Oct. 12, 2021, 8 a.m. 26.0 ppb (25) 11.0 ppb (11) N/A 14.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 3.0 μg/m3 (13) 25.0
 
Oct. 12, 2021, 7 a.m. 32.0 ppb (31) 18.0 ppb (17) N/A 14.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 3.0 μg/m3 (13) 31.0
 
Oct. 12, 2021, 6 a.m. 24.0 ppb (23) 10.0 ppb (10) N/A 14.0 ppb (14) N/A N/A N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 12, 2021, 5 a.m. 27.0 ppb (26) 10.0 ppb (10) N/A 17.0 ppb (17) N/A N/A N/A 0.49 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 12, 2021, 4 a.m. 17.0 ppb (17) 4.0 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.56 ppb (7) N/A 3.0 μg/m3 (13) 17.0
 
Oct. 12, 2021, 3 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (4) N/A 0.0 μg/m3 (0) 5.0
 
Oct. 12, 2021, 2 a.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (4) N/A 0.0 μg/m3 (0) 7.0
 
Oct. 12, 2021, 1 a.m. 8.0 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.3 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 12, 2021, midnight 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 11 p.m. 10.0 ppb (10) 1.0 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.28 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 10 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 9 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 8 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, 7 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 11, 2021, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 11, 2021, 3 p.m. 2.0 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 2 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 1 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, noon 13.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 2.0 μg/m3 (9) 13.0
 
Oct. 11, 2021, 11 a.m. 14.0 ppb (14) 4.0 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 14.0
 
Oct. 11, 2021, 10 a.m. 14.0 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 11, 2021, 9 a.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Oct. 11, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 11, 2021, 1 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, midnight 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, 10 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, 8 p.m. 0.0 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 7 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 10, 2021, 6 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 5 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Oct. 10, 2021, 4 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Oct. 10, 2021, 3 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 2 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 10, 2021, noon 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.26 ppb (4) N/A -1.0 μg/m3 (0) 4.0
 
Oct. 10, 2021, 11 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 10 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 9 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 8 a.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, 7 a.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 2021, 6 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 0.22 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 5 a.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 2021, 4 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 10, 2021, 3 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 2 a.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 1 a.m. 0.0 ppb (0) 1.0 ppb (1) N/A N/A N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, midnight -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 9, 2021, 11 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 9, 2021, 10 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.2 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
Oct. 9, 2021, 9 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 9, 2021, 8 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 9, 2021, 7 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 9, 2021, 6 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 9, 2021, 5 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 9, 2021, 4 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 9, 2021, 3 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 9, 2021, 2 p.m. -1.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 9, 2021, 1 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A N/A N/A 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 9, 2021, noon 0.0 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0