ID: 1312

AQSQID: 250270023

Site Name: Worcester

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

Updated: July 25, 2021, 8:55 a.m.

Location: Worcester (Downtown Worcester), MA

Reporting: True, Located: True

Current AQI: 46.0

Worcester (Downtown Worcester) MA, US: 42.263901, -71.794701

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 25, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
July 25, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 25, 2021, 4 a.m. 7.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
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 0.36 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
July 25, 2021, 2 a.m. 5.0 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 25, 2021, 1 a.m. 9.0 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.36 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
July 25, 2021, midnight 9.0 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 11 p.m. 10.0 ppb (10) 1.0 ppb (1) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.37 ppb (5) N/A 1.0 μg/m3 (5) 10.0
 
July 24, 2021, 10 p.m. 8.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 24, 2021, 9 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 24, 2021, 8 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 24, 2021, 7 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 6 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
July 24, 2021, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 24, 2021, 3 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 24, 2021, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 1 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, noon 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 24, 2021, 11 a.m. 11.0 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 10 a.m. 20.0 ppb (19) 9.0 ppb (9) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 24, 2021, 9 a.m. 22.0 ppb (21) 9.0 ppb (9) N/A 13.0 ppb (13) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 8 a.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 24, 2021, 7 a.m. 18.0 ppb (17) 7.0 ppb (7) N/A 11.0 ppb (11) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 24, 2021, 6 a.m. 14.0 ppb (14) 4.0 ppb (4) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
July 24, 2021, 5 a.m. 12.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 24, 2021, 4 a.m. 18.0 ppb (17) 9.0 ppb (9) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 3 a.m. 23.0 ppb (22) 9.0 ppb (9) N/A 14.0 ppb (14) N/A 0.0 ppb (0) N/A 0.36 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
July 24, 2021, 2 a.m. 13.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (11) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 16.0 μg/m3 (60) 60.0
 
July 24, 2021, 1 a.m. 14.0 ppb (14) 2.0 ppb (2) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
July 24, 2021, midnight 19.0 ppb (18) 4.0 ppb (4) N/A 15.0 ppb (15) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 23, 2021, 11 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 10 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 23, 2021, 9 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 8 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 7 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 6 p.m. 5.0 ppb (5) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 23, 2021, 5 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 4 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
July 23, 2021, 2 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 23, 2021, 1 p.m. 10.0 ppb (10) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, noon 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 11 a.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 10 a.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 23, 2021, 9 a.m. 7.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 8 a.m. 7.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 7 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 6 a.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 23, 2021, 5 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
July 23, 2021, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 23, 2021, 3 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 23, 2021, 2 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 23, 2021, 1 a.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 23, 2021, midnight 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, 11 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 22, 2021, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 9 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 8 p.m. 10.0 ppb (10) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, 7 p.m. 8.0 ppb (8) 4.0 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 22, 2021, 6 p.m. 5.0 ppb (5) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 5 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 22, 2021, 4 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 17.0 μg/m3 (62) 62.0
 
July 22, 2021, 3 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
July 22, 2021, 2 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 1 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, noon 11.0 ppb (11) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 22, 2021, 11 a.m. 7.0 ppb (7) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 22, 2021, 10 a.m. 10.0 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
July 22, 2021, 9 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 8 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
July 22, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 22, 2021, 4 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, 3 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 22, 2021, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 22, 2021, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.38 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
July 22, 2021, midnight 8.0 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 21, 2021, 11 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 21, 2021, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.38 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
July 21, 2021, 9 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
July 21, 2021, 8 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 21, 2021, 7 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 21, 2021, 6 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.4 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
July 21, 2021, 5 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.39 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
July 21, 2021, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.37 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
July 21, 2021, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.38 ppb (5) N/A 19.0 μg/m3 (66) 66.0
 
July 21, 2021, 2 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.43 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
July 21, 2021, 1 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 21.0 μg/m3 (70) 70.0
 
July 21, 2021, noon 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.45 ppb (6) N/A 35.0 μg/m3 (100) 100.0
 
July 21, 2021, 11 a.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (14) N/A 0.0 ppb (0) N/A 0.5 ppb (6) N/A 21.0 μg/m3 (70) 70.0
 
July 21, 2021, 10 a.m. 14.0 ppb (14) 2.0 ppb (2) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A 0.48 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
July 21, 2021, 9 a.m. 21.0 ppb (20) 5.0 ppb (5) N/A 17.0 ppb (17) N/A 0.0 ppb (0) N/A 0.51 ppb (6) N/A 23.0 μg/m3 (74) 74.0
 
July 21, 2021, 8 a.m. 10.0 ppb (10) 1.0 ppb (1) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.45 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
July 21, 2021, 7 a.m. 11.0 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A 0.47 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
July 21, 2021, 6 a.m. 4.0 ppb (4) -1.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.43 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
July 21, 2021, 5 a.m. 3.0 ppb (3) -1.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.45 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
July 21, 2021, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.55 ppb (7) N/A 36.0 μg/m3 (103) 103.0
 
July 21, 2021, 3 a.m. 9.0 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.66 ppb (8) N/A 55.0 μg/m3 (150) 150.0
 
July 21, 2021, 2 a.m. 9.0 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.64 ppb (7) N/A 55.0 μg/m3 (150) 150.0
 
July 21, 2021, 1 a.m. 12.0 ppb (12) 0.0 ppb (0) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A 0.67 ppb (8) N/A 59.0 μg/m3 (153) 153.0
 
July 21, 2021, midnight 11.0 ppb (11) 1.0 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A 0.65 ppb (8) N/A 51.0 μg/m3 (140) 140.0
 
July 20, 2021, 11 p.m. 7.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.6 ppb (7) N/A 50.0 μg/m3 (137) 137.0
 
July 20, 2021, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.57 ppb (7) N/A 49.0 μg/m3 (135) 135.0
 
July 20, 2021, 9 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.65 ppb (8) N/A 51.0 μg/m3 (140) 140.0
 
July 20, 2021, 8 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.66 ppb (8) N/A 47.0 μg/m3 (130) 130.0
 
July 20, 2021, 7 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.6 ppb (7) N/A 52.0 μg/m3 (142) 142.0
 
July 20, 2021, 6 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.57 ppb (7) N/A 55.0 μg/m3 (150) 150.0
 
July 20, 2021, 5 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.51 ppb (6) N/A 53.0 μg/m3 (145) 145.0
 
July 20, 2021, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.49 ppb (6) N/A 40.0 μg/m3 (113) 113.0
 
July 20, 2021, 3 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.47 ppb (6) N/A 37.0 μg/m3 (105) 105.0
 
July 20, 2021, 2 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.54 ppb (6) N/A 40.0 μg/m3 (113) 113.0
 
July 20, 2021, 1 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.53 ppb (6) N/A N/A 11.0
 
July 20, 2021, noon 17.0 ppb (17) 8.0 ppb (8) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.52 ppb (6) N/A 27.0 μg/m3 (83) 83.0
 
July 20, 2021, 11 a.m. 20.0 ppb (19) 9.0 ppb (9) N/A 11.0 ppb (11) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 25.0 μg/m3 (79) 79.0
 
July 20, 2021, 10 a.m. 18.0 ppb (17) 7.0 ppb (7) N/A 11.0 ppb (11) N/A 0.0 ppb (0) N/A 0.45 ppb (6) N/A 20.0 μg/m3 (68) 68.0
 
July 20, 2021, 9 a.m. 16.0 ppb (16) 6.0 ppb (6) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 20, 2021, 8 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 20, 2021, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 20, 2021, 6 a.m. 7.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 20, 2021, 5 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 20, 2021, 4 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A -2.0 μg/m3 (0) 6.0
 
July 20, 2021, 3 a.m. 13.0 ppb (13) 6.0 ppb (6) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 2.0 μg/m3 (9) 13.0
 
July 20, 2021, 2 a.m. 14.0 ppb (14) 5.0 ppb (5) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.39 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
July 20, 2021, 1 a.m. 16.0 ppb (16) 7.0 ppb (7) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.41 ppb (5) N/A 2.0 μg/m3 (9) 16.0
 
July 20, 2021, midnight 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 1.0 μg/m3 (5) 7.0
 
July 19, 2021, 11 p.m. 9.0 ppb (9) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 19, 2021, 10 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
July 19, 2021, 9 p.m. 15.0 ppb (15) 5.0 ppb (5) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A 0.4 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 8 p.m. 15.0 ppb (15) 7.0 ppb (7) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
July 19, 2021, 7 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.36 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 6 p.m. 13.0 ppb (13) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 5 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 4 p.m. 10.0 ppb (10) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
July 19, 2021, 3 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 2 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 1 p.m. 21.0 ppb (20) 11.0 ppb (11) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A N/A N/A 3.0 μg/m3 (13) 20.0
 
July 19, 2021, noon 17.0 ppb (17) 8.0 ppb (8) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A N/A N/A 2.0 μg/m3 (9) 17.0
 
July 19, 2021, 11 a.m. 14.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 2.0 μg/m3 (9) 14.0
 
July 19, 2021, 10 a.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
July 19, 2021, 9 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 8 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 19, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 19, 2021, 3 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 2 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 19, 2021, 1 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
July 19, 2021, midnight 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A -1.0 μg/m3 (0) 6.0
 
July 18, 2021, 11 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 18, 2021, 10 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 18, 2021, 9 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 18, 2021, 8 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 18, 2021, 7 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
July 18, 2021, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
July 18, 2021, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 18, 2021, 3 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
July 18, 2021, 2 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 18, 2021, 1 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
July 18, 2021, noon 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
July 18, 2021, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
July 18, 2021, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
July 18, 2021, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
July 18, 2021, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0