ID: 2256

AQSQID: 250250044

Site Name: Boston-Von Hillern

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

Updated: July 30, 2021, 8 p.m.

Location: Boston (S Boston), MA

Reporting: True, Located: True

Current AQI: 38.0

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 30, 2021, 6 p.m. 16.0 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.08 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 30, 2021, 5 p.m. 15.0 ppb (15) 5.0 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.04 ppb (0) N/A 12.0 μg/m3 (50) 50.0
 
July 30, 2021, 4 p.m. 22.0 ppb (21) 8.0 ppb (8) N/A 14.0 ppb (14) N/A N/A N/A 0.05 ppb (2) N/A 15.0 μg/m3 (58) 58.0
 
July 30, 2021, 3 p.m. 20.0 ppb (19) 8.0 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.05 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 30, 2021, 2 p.m. 18.0 ppb (17) 7.0 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.07 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 30, 2021, 1 p.m. 22.0 ppb (21) 9.0 ppb (9) N/A 13.0 ppb (13) N/A N/A N/A 0.1 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 30, 2021, noon 26.0 ppb (25) 11.0 ppb (11) N/A 15.0 ppb (15) N/A N/A N/A 0.1 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 30, 2021, 11 a.m. 32.0 ppb (31) 15.0 ppb (15) N/A 17.0 ppb (17) N/A N/A N/A 0.13 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
July 30, 2021, 10 a.m. 32.0 ppb (31) 14.0 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.16 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
July 30, 2021, 9 a.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (14) N/A N/A N/A 0.08 ppb (2) N/A 2.0 μg/m3 (9) 18.0
 
July 30, 2021, 8 a.m. 13.0 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.02 ppb (0) N/A 3.0 μg/m3 (13) 13.0
 
July 30, 2021, 7 a.m. 18.0 ppb (17) 2.0 ppb (2) N/A 16.0 ppb (16) N/A N/A N/A 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 30, 2021, 6 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A 0.05 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 30, 2021, 5 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 8.0 μg/m3 (34) 34.0
 
July 30, 2021, 4 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 30, 2021, 3 a.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 6.0 μg/m3 (25) 25.0
 
July 30, 2021, 2 a.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 6.0 μg/m3 (25) 25.0
 
July 30, 2021, 1 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 3.0 μg/m3 (13) 13.0
 
July 30, 2021, midnight 5.0 ppb (5) 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 29, 2021, 11 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.02 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 29, 2021, 10 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.02 ppb (0) N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 9 p.m. 12.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 8 p.m. 12.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
July 29, 2021, 7 p.m. 13.0 ppb (13) 5.0 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
July 29, 2021, 6 p.m. 12.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.0 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
July 29, 2021, 5 p.m. 15.0 ppb (15) 6.0 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.04 ppb (0) N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 4 p.m. 22.0 ppb (21) 9.0 ppb (9) N/A 13.0 ppb (13) N/A N/A N/A 0.08 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 3 p.m. 22.0 ppb (21) 8.0 ppb (8) N/A 13.0 ppb (13) N/A N/A N/A 0.09 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 29, 2021, 2 p.m. 19.0 ppb (18) 8.0 ppb (8) N/A 11.0 ppb (11) N/A N/A N/A 0.08 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
July 29, 2021, 1 p.m. 24.0 ppb (23) 11.0 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.09 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 29, 2021, noon 25.0 ppb (24) 12.0 ppb (12) N/A 13.0 ppb (13) N/A N/A N/A 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 29, 2021, 11 a.m. 32.0 ppb (31) 18.0 ppb (17) N/A 14.0 ppb (14) N/A N/A N/A 0.16 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 29, 2021, 10 a.m. 32.0 ppb (31) 18.0 ppb (17) N/A 15.0 ppb (15) N/A N/A N/A 0.2 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 29, 2021, 9 a.m. 20.0 ppb (19) 8.0 ppb (8) N/A 11.0 ppb (11) N/A N/A N/A 0.1 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 8 a.m. 13.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.04 ppb (0) N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 7 a.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 29, 2021, 6 a.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.0 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
July 29, 2021, 5 a.m. 9.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.05 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 29, 2021, 4 a.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.13 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
July 29, 2021, 3 a.m. 19.0 ppb (18) 6.0 ppb (6) N/A 13.0 ppb (13) N/A N/A N/A 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 29, 2021, 2 a.m. 16.0 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.22 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 29, 2021, 1 a.m. 17.0 ppb (17) 4.0 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
July 29, 2021, midnight 9.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 28, 2021, 11 p.m. 8.0 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 (30) 30.0
 
July 28, 2021, 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 6.0 μg/m3 (25) 25.0
 
July 28, 2021, 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 4.0 μg/m3 (17) 17.0
 
July 28, 2021, 8 p.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 5.0 μg/m3 (21) 21.0
 
July 28, 2021, 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 5.0 μg/m3 (21) 21.0
 
July 28, 2021, 6 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 8.0 μg/m3 (34) 34.0
 
July 28, 2021, 5 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
July 28, 2021, 4 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
July 28, 2021, 3 p.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
July 28, 2021, 2 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A N/A 10.0
 
July 28, 2021, 1 p.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A N/A 12.0
 
July 28, 2021, noon 13.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A -0.03 ppb (0) N/A 12.0 μg/m3 (50) 50.0
 
July 28, 2021, 11 a.m. 11.0 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
July 28, 2021, 10 a.m. 11.0 ppb (11) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
July 28, 2021, 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 16.0 μg/m3 (60) 60.0
 
July 28, 2021, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 14.0 μg/m3 (55) 55.0
 
July 28, 2021, 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 (60) 60.0
 
July 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (62) 62.0
 
July 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (60) 60.0
 
July 28, 2021, 1 a.m. 12.0 ppb (12) 1.0 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.07 ppb (2) N/A 17.0 μg/m3 (62) 62.0
 
July 28, 2021, midnight 15.0 ppb (15) 2.0 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A 0.06 ppb (2) N/A 14.0 μg/m3 (55) 55.0
 
July 27, 2021, 11 p.m. 13.0 ppb (13) 1.0 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A 0.07 ppb (2) N/A 19.0 μg/m3 (66) 66.0
 
July 27, 2021, 10 p.m. 13.0 ppb (13) 1.0 ppb (1) N/A 12.0 ppb (12) N/A N/A N/A 0.15 ppb (2) N/A 20.0 μg/m3 (68) 68.0
 
July 27, 2021, 9 p.m. 12.0 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.1 ppb (2) N/A 15.0 μg/m3 (58) 58.0
 
July 27, 2021, 8 p.m. 10.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.09 ppb (2) N/A 14.0 μg/m3 (55) 55.0
 
July 27, 2021, 7 p.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.08 ppb (2) N/A 18.0 μg/m3 (64) 64.0
 
July 27, 2021, 6 p.m. 16.0 ppb (16) 4.0 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.11 ppb (2) N/A 19.0 μg/m3 (66) 66.0
 
July 27, 2021, 5 p.m. 16.0 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.11 ppb (2) N/A 20.0 μg/m3 (68) 68.0
 
July 27, 2021, 4 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (12) N/A N/A N/A 0.11 ppb (2) N/A 21.0 μg/m3 (70) 70.0
 
July 27, 2021, 3 p.m. 12.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.04 ppb (0) N/A 21.0 μg/m3 (70) 70.0
 
July 27, 2021, 2 p.m. 19.0 ppb (18) 6.0 ppb (6) N/A 13.0 ppb (13) N/A N/A N/A 0.07 ppb (2) N/A 15.0 μg/m3 (58) 58.0
 
July 27, 2021, 1 p.m. 27.0 ppb (26) 10.0 ppb (10) N/A 17.0 ppb (17) N/A N/A N/A 0.17 ppb (3) N/A 26.0 μg/m3 (81) 81.0
 
July 27, 2021, noon 33.0 ppb (32) 14.0 ppb (14) N/A 18.0 ppb (17) N/A N/A N/A 0.19 ppb (3) N/A 26.0 μg/m3 (81) 81.0
 
July 27, 2021, 11 a.m. 45.0 ppb (43) 23.0 ppb (22) N/A 23.0 ppb (22) N/A N/A N/A 0.27 ppb (4) N/A 30.0 μg/m3 (89) 89.0
 
July 27, 2021, 10 a.m. 54.0 ppb (51) 28.0 ppb (27) N/A 26.0 ppb (25) N/A N/A N/A 0.4 ppb (5) N/A 35.0 μg/m3 (100) 100.0
 
July 27, 2021, 9 a.m. 34.0 ppb (33) 15.0 ppb (15) N/A 19.0 ppb (18) N/A N/A N/A 0.24 ppb (3) N/A 32.0 μg/m3 (93) 93.0
 
July 27, 2021, 8 a.m. 15.0 ppb (15) 3.0 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A 0.18 ppb (3) N/A 37.0 μg/m3 (105) 105.0
 
July 27, 2021, 7 a.m. 12.0 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.12 ppb (2) N/A 38.0 μg/m3 (108) 108.0
 
July 27, 2021, 6 a.m. 16.0 ppb (16) 1.0 ppb (1) N/A 14.0 ppb (14) N/A N/A N/A 0.17 ppb (3) N/A 44.0 μg/m3 (122) 122.0
 
July 27, 2021, 5 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 57.0 μg/m3 (152) 152.0
 
July 27, 2021, 4 a.m. 20.0 ppb (19) 3.0 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A 0.55 ppb (7) N/A 60.0 μg/m3 (154) 154.0
 
July 27, 2021, 3 a.m. 21.0 ppb (20) 3.0 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A 0.75 ppb (10) N/A 66.0 μg/m3 (157) 157.0
 
July 27, 2021, 2 a.m. 20.0 ppb (19) 3.0 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A 0.65 ppb (8) N/A 72.0 μg/m3 (160) 160.0
 
July 27, 2021, 1 a.m. 25.0 ppb (24) 4.0 ppb (4) N/A 20.0 ppb (19) N/A N/A N/A 0.73 ppb (8) N/A 80.0 μg/m3 (164) 164.0
 
July 27, 2021, midnight 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (17) N/A N/A N/A 0.69 ppb (8) N/A 82.0 μg/m3 (165) 165.0
 
July 26, 2021, 11 p.m. 17.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 76.0 μg/m3 (162) 162.0
 
July 26, 2021, 10 p.m. 14.0 ppb (14) 1.0 ppb (1) N/A 12.0 ppb (12) N/A N/A N/A 0.51 ppb (6) N/A 87.0 μg/m3 (168) 168.0
 
July 26, 2021, 9 p.m. 10.0 ppb (10) 1.0 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A 0.45 ppb (6) N/A 84.0 μg/m3 (166) 166.0
 
July 26, 2021, 8 p.m. 13.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A 0.46 ppb (6) N/A 79.0 μg/m3 (164) 164.0
 
July 26, 2021, 7 p.m. 13.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A 0.48 ppb (6) N/A 91.0 μg/m3 (170) 170.0
 
July 26, 2021, 6 p.m. 15.0 ppb (15) 3.0 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.26 ppb (4) N/A 40.0 μg/m3 (113) 113.0
 
July 26, 2021, 5 p.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (13) N/A N/A N/A 0.13 ppb (2) N/A 25.0 μg/m3 (79) 79.0
 
July 26, 2021, 4 p.m. 25.0 ppb (24) 8.0 ppb (8) N/A 17.0 ppb (17) N/A N/A N/A 0.12 ppb (2) N/A 24.0 μg/m3 (77) 77.0
 
July 26, 2021, 3 p.m. 23.0 ppb (22) 7.0 ppb (7) N/A 16.0 ppb (16) N/A N/A N/A 0.16 ppb (3) N/A 25.0 μg/m3 (79) 79.0
 
July 26, 2021, 2 p.m. 26.0 ppb (25) 9.0 ppb (9) N/A 17.0 ppb (17) N/A N/A N/A 0.2 ppb (3) N/A 28.0 μg/m3 (85) 85.0
 
July 26, 2021, 1 p.m. 32.0 ppb (31) 13.0 ppb (13) N/A 19.0 ppb (18) N/A N/A N/A 0.24 ppb (3) N/A 30.0 μg/m3 (89) 89.0
 
July 26, 2021, noon 32.0 ppb (31) 15.0 ppb (15) N/A 17.0 ppb (17) N/A N/A N/A 0.24 ppb (3) N/A 26.0 μg/m3 (81) 81.0
 
July 26, 2021, 11 a.m. 36.0 ppb (34) 20.0 ppb (19) N/A 16.0 ppb (16) N/A N/A N/A 0.23 ppb (3) N/A 17.0 μg/m3 (62) 62.0
 
July 26, 2021, 10 a.m. 37.0 ppb (35) 22.0 ppb (21) N/A 15.0 ppb (15) N/A N/A N/A 0.23 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
July 26, 2021, 9 a.m. 28.0 ppb (27) 14.0 ppb (14) N/A 14.0 ppb (14) N/A N/A N/A 0.17 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 26, 2021, 8 a.m. 14.0 ppb (14) 5.0 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.07 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
July 26, 2021, 7 a.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.02 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
July 26, 2021, 6 a.m. 8.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.03 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
July 26, 2021, 5 a.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
 
July 26, 2021, 4 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.09 ppb (2) N/A 15.0 μg/m3 (58) 58.0
 
July 26, 2021, 3 a.m. 12.0 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.18 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
July 26, 2021, 2 a.m. 15.0 ppb (15) 3.0 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
July 26, 2021, 1 a.m. 15.0 ppb (15) 3.0 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
July 26, 2021, midnight 11.0 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.14 ppb (2) N/A 14.0 μg/m3 (55) 55.0
 
July 25, 2021, 11 p.m. 10.0 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.12 ppb (2) N/A 17.0 μg/m3 (62) 62.0
 
July 25, 2021, 10 p.m. 8.0 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.09 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 9 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.03 ppb (0) N/A 15.0 μg/m3 (58) 58.0
 
July 25, 2021, 8 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.03 ppb (0) N/A 12.0 μg/m3 (50) 50.0
 
July 25, 2021, 7 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.02 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 6 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 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 5 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.0 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
July 25, 2021, 4 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 12.0 μg/m3 (50) 50.0
 
July 25, 2021, 3 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 9.0 μg/m3 (38) 38.0
 
July 25, 2021, 2 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.0 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
July 25, 2021, 1 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
July 25, 2021, noon 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
July 25, 2021, 11 a.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 7.0 μg/m3 (30) 30.0
 
July 25, 2021, 10 a.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 10.0 μg/m3 (42) 42.0
 
July 25, 2021, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
July 25, 2021, 8 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.03 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
July 25, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.04 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
July 25, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A 0.11 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.11 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 25, 2021, 4 a.m. 9.0 ppb (9) 0.0 ppb (0) N/A 8.0 ppb (8) N/A N/A N/A 0.1 ppb (2) N/A 17.0 μg/m3 (62) 62.0
 
July 25, 2021, 3 a.m. 11.0 ppb (11) 1.0 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.25 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
July 25, 2021, 2 a.m. 11.0 ppb (11) 1.0 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.15 ppb (2) N/A 16.0 μg/m3 (60) 60.0
 
July 25, 2021, 1 a.m. 11.0 ppb (11) 1.0 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A 0.12 ppb (2) N/A 13.0 μg/m3 (53) 53.0
 
July 25, 2021, midnight 10.0 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.05 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 11 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.05 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 24, 2021, 10 p.m. 7.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A N/A 0.08 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 24, 2021, 9 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.0 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 8 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 7.0 μg/m3 (30) 30.0
 
July 24, 2021, 7 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.02 ppb (0) N/A 7.0 μg/m3 (30) 30.0
 
July 24, 2021, 6 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.06 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 5 p.m. 8.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.06 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
July 24, 2021, 4 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.0 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
July 24, 2021, 3 p.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.03 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 2 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 24, 2021, 1 p.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
July 24, 2021, noon 18.0 ppb (17) 7.0 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.02 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
July 24, 2021, 11 a.m. 29.0 ppb (28) 15.0 ppb (15) N/A 14.0 ppb (14) N/A N/A N/A 0.13 ppb (2) N/A 14.0 μg/m3 (55) 55.0
 
July 24, 2021, 10 a.m. 30.0 ppb (29) 14.0 ppb (14) N/A 16.0 ppb (16) N/A N/A N/A 0.2 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
July 24, 2021, 9 a.m. 31.0 ppb (30) 14.0 ppb (14) N/A 17.0 ppb (17) N/A N/A N/A 0.15 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 8 a.m. 22.0 ppb (21) 6.0 ppb (6) N/A 16.0 ppb (16) N/A N/A N/A 0.07 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 24, 2021, 7 a.m. 16.0 ppb (16) 2.0 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.04 ppb (0) N/A 8.0 μg/m3 (34) 34.0
 
July 24, 2021, 6 a.m. 30.0 ppb (29) 9.0 ppb (9) N/A 22.0 ppb (21) N/A N/A N/A 0.26 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 24, 2021, 5 a.m. 32.0 ppb (31) 9.0 ppb (9) N/A 22.0 ppb (21) N/A N/A N/A 0.37 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
July 24, 2021, 4 a.m. 25.0 ppb (24) 5.0 ppb (5) N/A 20.0 ppb (19) N/A N/A N/A 0.23 ppb (3) N/A 15.0 μg/m3 (58) 58.0
 
July 24, 2021, 3 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (17) N/A N/A N/A 0.04 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
July 24, 2021, 2 a.m. 30.0 ppb (29) 8.0 ppb (8) N/A 22.0 ppb (21) N/A N/A N/A 0.49 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
July 24, 2021, 1 a.m. 23.0 ppb (22) 5.0 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.37 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
July 24, 2021, midnight 16.0 ppb (16) 3.0 ppb (3) N/A 13.0 ppb (13) N/A N/A N/A 0.16 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 11 p.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 10 p.m. 12.0 ppb (12) 1.0 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 9 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 8 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 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 7 p.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 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 6 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 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 5 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 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 4 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0