ID: 1312

AQSQID: 250270023

Site Name: Worcester

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

Updated: Oct. 17, 2021, 2:03 a.m.

Location: Worcester (Downtown Worcester), MA

Reporting: True, Located: True

Current AQI: 21.0

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
Oct. 17, 2021, midnight 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.2 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 16, 2021, 11 p.m. 11.0 ppb (11) 3.0 ppb (3) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 10 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 9 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 8 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 16, 2021, 7 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 6 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 5 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 16, 2021, 4 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 3 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 16, 2021, 2 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 1 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 16, 2021, noon 9.0 ppb (9) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 16, 2021, 11 a.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 16, 2021, 10 a.m. 13.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, 9 a.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 16, 2021, 8 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 16, 2021, 7 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 16, 2021, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 16, 2021, 5 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 16, 2021, 4 a.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 16, 2021, 3 a.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 16, 2021, 2 a.m. 7.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 16, 2021, 1 a.m. 13.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 16, 2021, midnight 13.0 ppb (13) 2.0 ppb (2) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 15, 2021, 11 p.m. 15.0 ppb (15) 3.0 ppb (3) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 10 p.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 15, 2021, 9 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.48 ppb (6) N/A 3.0 μg/m3 (13) 17.0
 
Oct. 15, 2021, 8 p.m. 14.0 ppb (14) 5.0 ppb (5) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A 0.31 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 15, 2021, 4 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 15, 2021, 3 p.m. 15.0 ppb (15) 7.0 ppb (7) N/A 8.0 ppb (8) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 15, 2021, 2 p.m. 32.0 ppb (31) 18.0 ppb (17) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A N/A N/A N/A 31.0
 
Oct. 15, 2021, 1 p.m. 37.0 ppb (35) 21.0 ppb (20) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, noon 91.0 ppb (91) 73.0 ppb (72) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A 0.7 ppb (8) N/A 7.0 μg/m3 (30) 91.0
 
Oct. 15, 2021, 11 a.m. 69.0 ppb (67) 58.0 ppb (56) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A 0.64 ppb (7) N/A 5.0 μg/m3 (21) 67.0
 
Oct. 15, 2021, 10 a.m. 69.0 ppb (67) 58.0 ppb (56) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A 0.47 ppb (6) N/A 6.0 μg/m3 (25) 67.0
 
Oct. 15, 2021, 9 a.m. 64.0 ppb (62) 51.0 ppb (49) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A 0.37 ppb (5) N/A 8.0 μg/m3 (34) 62.0
 
Oct. 15, 2021, 8 a.m. 38.0 ppb (36) 27.0 ppb (26) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 36.0
 
Oct. 15, 2021, 7 a.m. 35.0 ppb (34) 24.0 ppb (23) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 34.0
 
Oct. 15, 2021, 6 a.m. 34.0 ppb (33) 22.0 ppb (21) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 33.0
 
Oct. 15, 2021, 5 a.m. 25.0 ppb (24) 12.0 ppb (12) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, 4 a.m. 30.0 ppb (29) 17.0 ppb (17) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A 0.48 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 15, 2021, 3 a.m. 57.0 ppb (55) 39.0 ppb (37) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A 0.71 ppb (8) N/A 16.0 μg/m3 (60) 60.0
 
Oct. 15, 2021, 2 a.m. 53.0 ppb (50) 32.0 ppb (31) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A 0.59 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
Oct. 15, 2021, 1 a.m. 34.0 ppb (33) 14.0 ppb (14) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A 0.53 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 15, 2021, midnight 28.0 ppb (27) 10.0 ppb (10) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A 0.45 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 14, 2021, 11 p.m. 20.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A 0.41 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 14, 2021, 10 p.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A 0.48 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 14, 2021, 9 p.m. 21.0 ppb (20) 4.0 ppb (4) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A 0.39 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 8 p.m. 21.0 ppb (20) 4.0 ppb (4) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 7 p.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, 6 p.m. 13.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 5 p.m. 11.0 ppb (11) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 14, 2021, 4 p.m. 16.0 ppb (16) 6.0 ppb (6) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 3 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 14, 2021, 2 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 1 p.m. 15.0 ppb (15) 7.0 ppb (7) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, noon 22.0 ppb (21) 9.0 ppb (9) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Oct. 14, 2021, 11 a.m. 21.0 ppb (20) 8.0 ppb (8) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, 10 a.m. 21.0 ppb (20) 7.0 ppb (7) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 9 a.m. 12.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 14, 2021, 8 a.m. 13.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.2 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 14, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A 0.21 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 4 a.m. 12.0 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 3 a.m. 22.0 ppb (21) 6.0 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, 2 a.m. 12.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 14, 2021, 1 a.m. 13.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 14, 2021, midnight 13.0 ppb (13) 3.0 ppb (3) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 13, 2021, 11 p.m. 15.0 ppb (15) 4.0 ppb (4) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 10 p.m. 18.0 ppb (17) 7.0 ppb (7) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 17.0
 
Oct. 13, 2021, 9 p.m. 13.0 ppb (13) 5.0 ppb (5) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 13, 2021, 8 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 13, 2021, 7 p.m. 12.0 ppb (12) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 13, 2021, 6 p.m. 15.0 ppb (15) 6.0 ppb (6) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 5 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 4 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 3 p.m. 10.0 ppb (10) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 2 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 13, 2021, 1 p.m. 31.0 ppb (30) 14.0 ppb (14) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 22.0 μg/m3 (72) 72.0
 
Oct. 13, 2021, noon 48.0 ppb (46) 24.0 ppb (23) N/A 24.0 ppb (23) N/A 1.0 ppb (2) N/A 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 13, 2021, 11 a.m. 50.0 ppb (48) 21.0 ppb (20) N/A 29.0 ppb (28) N/A 1.0 ppb (2) N/A 0.39 ppb (5) N/A 11.0 μg/m3 (46) 48.0
 
Oct. 13, 2021, 10 a.m. 45.0 ppb (43) 18.0 ppb (17) N/A 27.0 ppb (26) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 43.0
 
Oct. 13, 2021, 9 a.m. 34.0 ppb (33) 11.0 ppb (11) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 33.0
 
Oct. 13, 2021, 8 a.m. 23.0 ppb (22) 5.0 ppb (5) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 7 a.m. 22.0 ppb (21) 4.0 ppb (4) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 13, 2021, 6 a.m. 23.0 ppb (22) 5.0 ppb (5) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 13, 2021, 5 a.m. 21.0 ppb (20) 4.0 ppb (4) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 13, 2021, 4 a.m. 32.0 ppb (31) 11.0 ppb (11) N/A 21.0 ppb (20) N/A 1.0 ppb (2) N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 31.0
 
Oct. 13, 2021, 3 a.m. 38.0 ppb (36) 16.0 ppb (16) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 36.0
 
Oct. 13, 2021, 2 a.m. 39.0 ppb (37) 16.0 ppb (16) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A 0.51 ppb (6) N/A 6.0 μg/m3 (25) 37.0
 
Oct. 13, 2021, 1 a.m. 41.0 ppb (39) 17.0 ppb (17) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A 0.44 ppb (5) N/A 8.0 μg/m3 (34) 39.0
 
Oct. 13, 2021, midnight 38.0 ppb (36) 12.0 ppb (12) N/A 26.0 ppb (25) N/A 1.0 ppb (2) N/A 0.45 ppb (6) N/A 7.0 μg/m3 (30) 36.0
 
Oct. 12, 2021, 11 p.m. 28.0 ppb (27) 5.0 ppb (5) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A 0.49 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
Oct. 12, 2021, 10 p.m. 26.0 ppb (25) 6.0 ppb (6) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A 0.45 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 12, 2021, 9 p.m. 17.0 ppb (17) 6.0 ppb (6) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 12, 2021, 8 p.m. 27.0 ppb (26) 12.0 ppb (12) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Oct. 12, 2021, 7 p.m. 13.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 12, 2021, 6 p.m. 17.0 ppb (17) 6.0 ppb (6) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 12, 2021, 5 p.m. 11.0 ppb (11) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 12, 2021, 4 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.22 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 12, 2021, 3 p.m. 11.0 ppb (11) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Oct. 12, 2021, 2 p.m. 32.0 ppb (31) 14.0 ppb (14) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 15.0 μg/m3 (58) 58.0
 
Oct. 12, 2021, 1 p.m. 84.0 ppb (83) 58.0 ppb (56) N/A 26.0 ppb (25) N/A N/A N/A 0.62 ppb (7) N/A 18.0 μg/m3 (64) 83.0
 
Oct. 12, 2021, noon 82.0 ppb (81) 65.0 ppb (63) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A 0.71 ppb (8) N/A 7.0 μg/m3 (30) 81.0
 
Oct. 12, 2021, 11 a.m. 88.0 ppb (88) 76.0 ppb (75) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.67 ppb (8) N/A 7.0 μg/m3 (30) 88.0
 
Oct. 12, 2021, 10 a.m. 95.0 ppb (95) 81.0 ppb (80) N/A 13.0 ppb (13) N/A 2.0 ppb (3) N/A 0.45 ppb (6) N/A 9.0 μg/m3 (38) 95.0
 
Oct. 12, 2021, 9 a.m. 63.0 ppb (61) 52.0 ppb (50) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 61.0
 
Oct. 12, 2021, 8 a.m. 31.0 ppb (30) 23.0 ppb (22) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 12, 2021, 7 a.m. 31.0 ppb (30) 24.0 ppb (23) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 12, 2021, 6 a.m. 22.0 ppb (21) 14.0 ppb (14) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 12, 2021, 5 a.m. 23.0 ppb (22) 14.0 ppb (14) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 12, 2021, 4 a.m. 25.0 ppb (24) 16.0 ppb (16) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 12, 2021, 3 a.m. 35.0 ppb (34) 23.0 ppb (22) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A 0.65 ppb (8) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 12, 2021, 2 a.m. 54.0 ppb (51) 38.0 ppb (36) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A 0.65 ppb (8) N/A 11.0 μg/m3 (46) 51.0
 
Oct. 12, 2021, 1 a.m. 43.0 ppb (41) 20.0 ppb (19) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A 0.5 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 12, 2021, midnight 28.0 ppb (27) 7.0 ppb (7) N/A 21.0 ppb (20) N/A 1.0 ppb (2) N/A 0.49 ppb (6) N/A 6.0 μg/m3 (25) 27.0
 
Oct. 11, 2021, 11 p.m. 27.0 ppb (26) 6.0 ppb (6) N/A 21.0 ppb (20) N/A 0.0 ppb (0) N/A 0.5 ppb (6) N/A 2.0 μg/m3 (9) 26.0
 
Oct. 11, 2021, 10 p.m. 17.0 ppb (17) 3.0 ppb (3) N/A 14.0 ppb (14) N/A 0.0 ppb (0) N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 17.0
 
Oct. 11, 2021, 9 p.m. 11.0 ppb (11) 3.0 ppb (3) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.31 ppb (4) N/A 2.0 μg/m3 (9) 11.0
 
Oct. 11, 2021, 8 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, 7 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 11, 2021, 6 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 11, 2021, 5 p.m. 9.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A 0.3 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
Oct. 11, 2021, 4 p.m. 14.0 ppb (14) 6.0 ppb (6) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 11, 2021, 3 p.m. 15.0 ppb (15) 6.0 ppb (6) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 11, 2021, 2 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, 1 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, noon 14.0 ppb (14) 5.0 ppb (5) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 11, 2021, 11 a.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 11, 2021, 10 a.m. 8.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 9 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 11, 2021, 8 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Oct. 11, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.19 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
Oct. 11, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 11, 2021, 3 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 11, 2021, 2 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 11, 2021, 1 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 11, 2021, midnight 7.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 2021, 11 p.m. 10.0 ppb (10) 2.0 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 10, 2021, 10 p.m. 11.0 ppb (11) 3.0 ppb (3) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 10, 2021, 9 p.m. 9.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 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 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 10, 2021, 7 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 10, 2021, 6 p.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 8.0 μg/m3 (34) 34.0
 
Oct. 10, 2021, 5 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Oct. 10, 2021, 4 p.m. 10.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Oct. 10, 2021, 3 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 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 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 1 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 2021, noon 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 10, 2021, 11 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Oct. 10, 2021, 10 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 9 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, 8 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 7 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 2021, 6 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Oct. 10, 2021, 5 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 4 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Oct. 10, 2021, 3 a.m. 10.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Oct. 10, 2021, 2 a.m. 10.0 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 1 a.m. 9.0 ppb (9) 2.0 ppb (2) 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