AQSQID: 250130018

Site Name: Springfieldsp

Location: Springfield (Armory Circle), MA

Reporting: False, Located: True

Current AQI: None

Springfield (Armory Circle) MA, US: 42.120248, -72.58499

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 22, 2019, 10 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2019, 6 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2019, 5 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.11 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, 4 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.13 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 22, 2019, 3 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, 2 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, 1 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, midnight 9.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 11 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 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 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 9 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 8 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 7 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 6 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, 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 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 4 p.m. 5.0 ppb (5) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.13 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 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 0.12 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 2 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, 1 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.12 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, noon 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2019, 11 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.12 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, 10 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, 9 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 8 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.07 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, 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 0.07 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.07 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 4 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 3 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.06 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 2 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.06 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 1 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.03 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, midnight 7.0 ppb (6) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.05 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 11 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.06 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 10 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.09 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 9 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, 8 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 7 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 6 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 5 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 4 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 3 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 2 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 1 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.06 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, noon 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 11 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.01 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 10 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.04 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 9 a.m. 8.0 ppb (7) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 8 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 7 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 6 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 5 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.13 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 4 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, 3 a.m. 15.0 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 20, 2019, 2 a.m. 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.17 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 20, 2019, 1 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.07 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, midnight 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 11 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 19, 2019, 10 p.m. 15.0 ppb (14) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 9 p.m. 18.0 ppb (17) 7.0 ppb (6) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 19, 2019, 8 p.m. 14.0 ppb (13) 6.0 ppb (6) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 7 p.m. 13.0 ppb (12) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.48 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 6 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.55 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2019, 5 p.m. 11.0 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.63 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2019, 4 p.m. 9.0 ppb (8) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.59 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 3 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 2 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 1 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, noon 13.0 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 19, 2019, 11 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 10 a.m. 13.0 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.12 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 6 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 5 a.m. 12.0 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.08 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 4 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 3 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.06 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 2 a.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 1 a.m. 20.0 ppb (19) 5.0 ppb (5) N/A 15.0 ppb (14) N/A 1.0 ppb (1) N/A 0.45 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, midnight 33.0 ppb (31) 9.0 ppb (8) N/A 24.0 ppb (22) N/A 1.0 ppb (1) N/A 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 11 p.m. 43.0 ppb (40) 15.0 ppb (14) N/A 28.0 ppb (26) N/A 1.0 ppb (1) N/A 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 10 p.m. 45.0 ppb (42) 16.0 ppb (15) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.58 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 9 p.m. 46.0 ppb (43) 16.0 ppb (15) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.6 ppb (7) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 8 p.m. 35.0 ppb (32) 13.0 ppb (12) N/A 23.0 ppb (21) N/A 1.0 ppb (1) N/A 0.65 ppb (7) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 7 p.m. 29.0 ppb (27) 11.0 ppb (10) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A 0.5 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 6 p.m. 25.0 ppb (23) 9.0 ppb (8) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A 0.48 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 5 p.m. 34.0 ppb (31) 16.0 ppb (15) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A 0.67 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 4 p.m. 40.0 ppb (37) 17.0 ppb (16) N/A 23.0 ppb (21) N/A 1.0 ppb (1) N/A 0.69 ppb (8) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 3 p.m. 29.0 ppb (27) 10.0 ppb (9) N/A 19.0 ppb (18) N/A 1.0 ppb (1) N/A 0.44 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 18, 2019, 2 p.m. 42.0 ppb (39) 20.0 ppb (19) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A 0.33 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 18, 2019, 1 p.m. 65.0 ppb (62) 36.0 ppb (33) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.53 ppb (6) N/A 16.0 μg/m3 (59) 62.0
 
Jan. 18, 2019, noon 45.0 ppb (42) 19.0 ppb (18) N/A 27.0 ppb (25) N/A 1.0 ppb (1) N/A 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 11 a.m. 52.0 ppb (48) 26.0 ppb (24) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A 0.4 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 10 a.m. 40.0 ppb (37) 14.0 ppb (13) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A 0.39 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 9 a.m. 25.0 ppb (23) 3.0 ppb (3) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A 0.33 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 8 a.m. 28.0 ppb (26) 4.0 ppb (4) N/A 24.0 ppb (22) N/A 1.0 ppb (1) N/A 0.24 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 7 a.m. 18.0 ppb (17) 1.0 ppb (1) N/A 17.0 ppb (16) N/A 0.0 ppb (0) N/A 0.15 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 6 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (16) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 5 a.m. 20.0 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 4 a.m. 23.0 ppb (21) 2.0 ppb (2) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 3 a.m. 23.0 ppb (21) 2.0 ppb (2) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A 0.17 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 2 a.m. 26.0 ppb (24) 3.0 ppb (3) N/A 23.0 ppb (21) N/A 1.0 ppb (1) N/A 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 1 a.m. 37.0 ppb (34) 8.0 ppb (7) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, midnight 36.0 ppb (33) 7.0 ppb (6) N/A 30.0 ppb (28) N/A 1.0 ppb (1) N/A 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 11 p.m. 42.0 ppb (39) 12.0 ppb (11) N/A 31.0 ppb (29) N/A 1.0 ppb (1) N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 39.0
 
Jan. 17, 2019, 10 p.m. 25.0 ppb (23) 4.0 ppb (4) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 9 p.m. 24.0 ppb (22) 5.0 ppb (5) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.68 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 8 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.58 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 7 p.m. 13.0 ppb (12) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 6 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.49 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 5 p.m. 12.0 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.46 ppb (5) N/A N/A 11.0
 
Jan. 17, 2019, 4 p.m. 10.0 ppb (9) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.52 ppb (6) N/A N/A 9.0
 
Jan. 17, 2019, 3 p.m. 14.0 ppb (13) 6.0 ppb (6) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 2 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 1 p.m. 21.0 ppb (19) 8.0 ppb (7) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, noon 28.0 ppb (26) 12.0 ppb (11) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 11 a.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 10 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 0.0 μg/m3 (0) 7.0
 
Jan. 17, 2019, 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 0.07 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2019, 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 0.05 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 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 0.05 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 3 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 2 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.05 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 1 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.03 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, midnight 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.04 ppb (0) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 11 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.07 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2019, 10 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 9 p.m. 16.0 ppb (15) 6.0 ppb (6) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 8 p.m. 31.0 ppb (29) 14.0 ppb (13) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 7 p.m. 18.0 ppb (17) 9.0 ppb (8) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.16 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2019, 6 p.m. 14.0 ppb (13) 6.0 ppb (6) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2019, 5 p.m. 29.0 ppb (27) 13.0 ppb (12) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A 0.28 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 16, 2019, 4 p.m. 30.0 ppb (28) 14.0 ppb (13) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 16, 2019, 3 p.m. 38.0 ppb (35) 18.0 ppb (17) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A 0.28 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 2 p.m. 39.0 ppb (36) 17.0 ppb (16) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 16, 2019, 1 p.m. 54.0 ppb (50) 29.0 ppb (27) N/A 25.0 ppb (23) N/A 1.0 ppb (1) N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Jan. 16, 2019, noon 57.0 ppb (53) 30.0 ppb (28) N/A 27.0 ppb (25) N/A 1.0 ppb (1) N/A N/A N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 11 a.m. 46.0 ppb (43) 20.0 ppb (19) N/A 27.0 ppb (25) N/A 1.0 ppb (1) N/A 0.18 ppb (2) N/A 22.0 μg/m3 (71) 71.0
 
Jan. 16, 2019, 10 a.m. 33.0 ppb (31) 9.0 ppb (8) N/A 24.0 ppb (22) N/A 1.0 ppb (1) N/A 0.1 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.12 ppb (1) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.18 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.21 ppb (2) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 6 a.m. 27.0 ppb (25) 4.0 ppb (4) N/A 23.0 ppb (21) N/A N/A N/A 0.17 ppb (2) N/A 21.0 μg/m3 (69) 69.0
 
Jan. 16, 2019, 5 a.m. 48.0 ppb (44) 20.0 ppb (19) N/A 27.0 ppb (25) N/A N/A N/A 0.5 ppb (6) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 4 a.m. 104.0 ppb (101) 75.0 ppb (72) N/A 29.0 ppb (27) N/A 2.0 ppb (3) N/A N/A N/A 20.0 μg/m3 (67) 101.0
 
Jan. 16, 2019, 3 a.m. 109.0 ppb (102) 79.0 ppb (77) N/A 29.0 ppb (27) N/A 2.0 ppb (3) N/A 0.78 ppb (9) N/A 18.0 μg/m3 (63) 102.0
 
Jan. 16, 2019, 2 a.m. 103.0 ppb (100) 72.0 ppb (69) N/A 31.0 ppb (29) N/A 2.0 ppb (3) N/A 0.69 ppb (8) N/A 18.0 μg/m3 (63) 100.0
 
Jan. 16, 2019, 1 a.m. 87.0 ppb (85) 55.0 ppb (51) N/A 32.0 ppb (30) N/A 1.0 ppb (1) N/A 0.62 ppb (7) N/A 21.0 μg/m3 (69) 85.0
 
Jan. 16, 2019, midnight 74.0 ppb (71) 42.0 ppb (39) N/A 32.0 ppb (30) N/A 1.0 ppb (1) N/A 0.72 ppb (8) N/A 13.0 μg/m3 (52) 71.0
 
Jan. 15, 2019, 11 p.m. 55.0 ppb (51) 24.0 ppb (22) N/A 31.0 ppb (29) N/A 1.0 ppb (1) N/A 0.46 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 15, 2019, 10 p.m. 44.0 ppb (41) 17.0 ppb (16) N/A 27.0 ppb (25) N/A 1.0 ppb (1) N/A 0.76 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 9 p.m. 28.0 ppb (26) 12.0 ppb (11) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.59 ppb (7) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 15, 2019, 8 p.m. 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.57 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 15, 2019, 7 p.m. 16.0 ppb (15) 8.0 ppb (7) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.59 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 6 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.59 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 5 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.65 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 4 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.57 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2019, 3 p.m. 15.0 ppb (14) 7.0 ppb (6) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 2 p.m. 33.0 ppb (31) 17.0 ppb (16) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A 0.36 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, 1 p.m. 56.0 ppb (52) 33.0 ppb (31) N/A 23.0 ppb (21) N/A 1.0 ppb (1) N/A 0.44 ppb (5) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 15, 2019, noon 106.0 ppb (101) 80.0 ppb (78) N/A 26.0 ppb (24) N/A 2.0 ppb (3) N/A 0.78 ppb (9) N/A 20.0 μg/m3 (67) 101.0
 
Jan. 15, 2019, 11 a.m. 92.0 ppb (90) 64.0 ppb (61) N/A 27.0 ppb (25) N/A 2.0 ppb (3) N/A 0.61 ppb (7) N/A 16.0 μg/m3 (59) 90.0