AQSQID: 250250042

Site Name: Boston - Roxbury

Location: Boston (Harrison Ave), MA

Reporting: False, Located: True

Current AQI: None

Boston (Harrison Ave) MA, US: 42.329399, -71.082497

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 22, 2019, 10 a.m. 21.0 ppb (19) 5.0 ppb (5) 21.3 ppb (20) 17.0 ppb (16) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 22, 2019, 9 a.m. N/A N/A 17.8 ppb (16) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 22, 2019, 8 a.m. N/A N/A 16.9 ppb (16) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 22, 2019, 7 a.m. N/A N/A 17.3 ppb (16) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 6 a.m. 16.0 ppb (15) 4.0 ppb (4) 15.7 ppb (15) 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.16 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 22, 2019, 5 a.m. 18.0 ppb (17) 5.0 ppb (5) 17.6 ppb (16) 13.0 ppb (12) N/A N/A 27.0 ppb (21) 0.16 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 22, 2019, 4 a.m. 16.0 ppb (15) 4.0 ppb (4) 16.2 ppb (15) 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 22, 2019, 3 a.m. 17.0 ppb (16) 5.0 ppb (5) 15.8 ppb (15) 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 22, 2019, 2 a.m. 15.0 ppb (14) 4.0 ppb (4) 14.8 ppb (14) 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 22, 2019, 1 a.m. 13.0 ppb (12) 4.0 ppb (4) 12.6 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 22, 2019, midnight 16.0 ppb (15) 4.0 ppb (4) 15.0 ppb (14) 11.0 ppb (10) N/A 0.0 ppb (0) 29.0 ppb (22) 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 21, 2019, 11 p.m. 12.0 ppb (11) 3.0 ppb (3) 12.5 ppb (12) 9.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2019, 10 p.m. 14.0 ppb (13) 4.0 ppb (4) 13.1 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2019, 9 p.m. 20.0 ppb (19) 6.0 ppb (6) 19.5 ppb (18) 14.0 ppb (13) N/A 0.0 ppb (0) 25.0 ppb (19) 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 21, 2019, 8 p.m. 17.0 ppb (16) 6.0 ppb (6) 17.2 ppb (16) 11.0 ppb (10) N/A 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2019, 7 p.m. 14.0 ppb (13) 5.0 ppb (5) 15.0 ppb (14) 9.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (22) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2019, 6 p.m. 16.0 ppb (15) 7.0 ppb (6) 15.8 ppb (15) 9.0 ppb (8) N/A 0.0 ppb (0) 29.0 ppb (22) 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 21, 2019, 5 p.m. 13.0 ppb (12) 6.0 ppb (6) 13.1 ppb (12) 7.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.18 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2019, 4 p.m. 17.0 ppb (16) 8.0 ppb (7) 16.4 ppb (15) 9.0 ppb (8) N/A 1.0 ppb (1) 28.0 ppb (22) 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2019, 3 p.m. 17.0 ppb (16) 7.0 ppb (6) 16.4 ppb (15) 9.0 ppb (8) N/A 1.0 ppb (1) 27.0 ppb (21) 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 21, 2019, 2 p.m. 18.0 ppb (17) 7.0 ppb (6) 18.8 ppb (17) 10.0 ppb (9) N/A 1.0 ppb (1) 26.0 ppb (20) 0.2 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 21, 2019, 1 p.m. 19.0 ppb (18) 7.0 ppb (6) 18.9 ppb (18) 13.0 ppb (12) N/A 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2019, noon 14.0 ppb (13) 3.0 ppb (3) 13.6 ppb (13) 11.0 ppb (10) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2019, 11 a.m. 12.0 ppb (11) 2.0 ppb (2) 11.6 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 26.0 ppb (20) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2019, 10 a.m. 16.0 ppb (15) 3.0 ppb (3) 15.2 ppb (14) 13.0 ppb (12) N/A 0.0 ppb (0) 23.0 ppb (18) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2019, 9 a.m. 15.0 ppb (14) 4.0 ppb (4) 14.9 ppb (14) 12.0 ppb (11) N/A 1.0 ppb (1) 24.0 ppb (18) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 8 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 25.0 ppb (19) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 7 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 24.0 ppb (18) 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2019, 6 a.m. 16.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 25.0 ppb (19) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 5 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 25.0 ppb (19) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 4 a.m. 13.0 ppb (12) 3.0 ppb (3) 12.3 ppb (11) 9.0 ppb (8) N/A 1.0 ppb (1) 26.0 ppb (20) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2019, 3 a.m. 11.0 ppb (10) 3.0 ppb (3) 10.6 ppb (10) 8.0 ppb (7) N/A 1.0 ppb (1) 28.0 ppb (22) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 21, 2019, 2 a.m. 14.0 ppb (13) 4.0 ppb (4) 14.1 ppb (13) 10.0 ppb (9) N/A 1.0 ppb (1) 27.0 ppb (21) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2019, 1 a.m. 10.0 ppb (9) 2.0 ppb (2) 10.1 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 21, 2019, midnight 14.0 ppb (13) 3.0 ppb (3) 14.2 ppb (13) 11.0 ppb (10) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 11 p.m. 18.0 ppb (17) 4.0 ppb (4) 18.5 ppb (17) 14.0 ppb (13) N/A 1.0 ppb (1) 23.0 ppb (18) 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 20, 2019, 10 p.m. 18.0 ppb (17) 3.0 ppb (3) 17.3 ppb (16) 15.0 ppb (14) N/A 1.0 ppb (1) 22.0 ppb (17) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 9 p.m. 18.0 ppb (17) 3.0 ppb (3) 18.5 ppb (17) 15.0 ppb (14) N/A 1.0 ppb (1) 21.0 ppb (16) 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 8 p.m. 16.0 ppb (15) 3.0 ppb (3) 15.6 ppb (14) 13.0 ppb (12) N/A 1.0 ppb (1) 23.0 ppb (18) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, 7 p.m. 24.0 ppb (22) 5.0 ppb (5) 23.5 ppb (22) 19.0 ppb (18) N/A 1.0 ppb (1) 18.0 ppb (14) 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2019, 6 p.m. 25.0 ppb (23) 5.0 ppb (5) 24.5 ppb (23) 20.0 ppb (19) N/A 1.0 ppb (1) 17.0 ppb (13) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 5 p.m. 26.0 ppb (24) 6.0 ppb (6) 25.9 ppb (24) 20.0 ppb (19) N/A 1.0 ppb (1) 17.0 ppb (13) 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2019, 4 p.m. 23.0 ppb (21) 4.0 ppb (4) 22.4 ppb (21) 19.0 ppb (18) N/A 0.0 ppb (0) 19.0 ppb (15) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 3 p.m. 22.0 ppb (20) 5.0 ppb (5) 22.5 ppb (21) 17.0 ppb (16) N/A 0.0 ppb (0) 19.0 ppb (15) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 2 p.m. 20.0 ppb (19) 4.0 ppb (4) 19.7 ppb (18) 16.0 ppb (15) N/A 0.0 ppb (0) 20.0 ppb (15) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 1 p.m. 16.0 ppb (15) 2.0 ppb (2) 15.6 ppb (14) 14.0 ppb (13) N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, noon 12.0 ppb (11) 1.0 ppb (1) 11.3 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 11 a.m. 13.0 ppb (12) 1.0 ppb (1) 12.8 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 10 a.m. 13.0 ppb (12) 2.0 ppb (2) 12.1 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 20, 2019, 9 a.m. 12.0 ppb (11) 2.0 ppb (2) 11.6 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 20, 2019, 8 a.m. 13.0 ppb (12) 2.0 ppb (2) 12.9 ppb (12) 11.0 ppb (10) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 20, 2019, 7 a.m. 10.0 ppb (9) 1.0 ppb (1) 10.0 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 24.0
 
Jan. 20, 2019, 6 a.m. 11.0 ppb (10) 1.0 ppb (1) 11.0 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 20, 2019, 5 a.m. 13.0 ppb (12) 1.0 ppb (1) 12.9 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 4 a.m. 15.0 ppb (14) 1.0 ppb (1) 14.2 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 3 a.m. 19.0 ppb (18) 2.0 ppb (2) 19.0 ppb (18) 17.0 ppb (16) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 2 a.m. 14.0 ppb (13) 1.0 ppb (1) 13.4 ppb (12) 13.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 20, 2019, 1 a.m. 11.0 ppb (10) 1.0 ppb (1) 11.2 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 20, 2019, midnight 11.0 ppb (10) 1.0 ppb (1) 10.9 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (23) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2019, 11 p.m. 13.0 ppb (12) 2.0 ppb (2) 13.6 ppb (13) 12.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (22) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2019, 10 p.m. 15.0 ppb (14) 2.0 ppb (2) 14.8 ppb (14) 13.0 ppb (12) N/A 0.0 ppb (0) 25.0 ppb (19) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2019, 9 p.m. 17.0 ppb (16) 2.0 ppb (2) 17.5 ppb (16) 15.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (18) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 8 p.m. 17.0 ppb (16) 2.0 ppb (2) 16.7 ppb (15) 15.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (18) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 7 p.m. 11.0 ppb (10) 2.0 ppb (2) 11.8 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 30.0 ppb (23) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 6 p.m. 16.0 ppb (15) 3.0 ppb (3) 16.0 ppb (15) 13.0 ppb (12) N/A 0.0 ppb (0) 27.0 ppb (21) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 5 p.m. 13.0 ppb (12) 3.0 ppb (3) 13.2 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 4 p.m. 9.0 ppb (8) 2.0 ppb (2) 9.3 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 3 p.m. 10.0 ppb (9) 3.0 ppb (3) 10.8 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 2 p.m. 11.0 ppb (10) 3.0 ppb (3) 11.0 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 30.0 ppb (23) 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 1 p.m. 12.0 ppb (11) 2.0 ppb (2) 12.0 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, noon 17.0 ppb (16) 2.0 ppb (2) 16.6 ppb (15) 14.0 ppb (13) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 11 a.m. 19.0 ppb (18) 2.0 ppb (2) 18.9 ppb (18) 17.0 ppb (16) N/A 0.0 ppb (0) 17.0 ppb (13) 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 10 a.m. 24.0 ppb (22) 4.0 ppb (4) 24.1 ppb (22) 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 9 a.m. N/A N/A 41.2 ppb (38) N/A N/A 1.0 ppb (1) 11.0 ppb (8) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 8 a.m. N/A N/A 16.6 ppb (15) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 7 a.m. N/A N/A 13.7 ppb (13) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 6 a.m. 21.0 ppb (19) 3.0 ppb (3) 21.4 ppb (20) 17.0 ppb (16) N/A N/A 15.0 ppb (12) 0.25 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 5 a.m. 28.0 ppb (26) 7.0 ppb (6) 29.6 ppb (27) 21.0 ppb (19) N/A N/A 9.0 ppb (7) 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 4 a.m. 26.0 ppb (24) 5.0 ppb (5) 26.8 ppb (25) 22.0 ppb (20) N/A 0.0 ppb (0) 8.0 ppb (6) 0.32 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 3 a.m. 34.0 ppb (31) 10.0 ppb (9) 36.3 ppb (34) 24.0 ppb (22) N/A 1.0 ppb (1) 6.0 ppb (5) 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 2 a.m. 23.0 ppb (21) 4.0 ppb (4) 23.9 ppb (22) 19.0 ppb (18) N/A 0.0 ppb (0) 12.0 ppb (9) 0.29 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 19, 2019, 1 a.m. 22.0 ppb (20) 3.0 ppb (3) 22.5 ppb (21) 19.0 ppb (18) N/A 0.0 ppb (0) 17.0 ppb (13) 0.36 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 19, 2019, midnight 24.0 ppb (22) 4.0 ppb (4) 23.8 ppb (22) 20.0 ppb (19) N/A 0.0 ppb (0) 18.0 ppb (14) 0.31 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 11 p.m. 30.0 ppb (28) 4.0 ppb (4) 29.9 ppb (28) 25.0 ppb (23) N/A 0.0 ppb (0) 13.0 ppb (10) 0.37 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 10 p.m. 28.0 ppb (26) 5.0 ppb (5) 28.1 ppb (26) 23.0 ppb (21) N/A 0.0 ppb (0) 16.0 ppb (12) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 9 p.m. 17.0 ppb (16) 3.0 ppb (3) 16.6 ppb (15) 14.0 ppb (13) N/A 0.0 ppb (0) 25.0 ppb (19) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 8 p.m. 15.0 ppb (14) 3.0 ppb (3) 14.6 ppb (14) 11.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (22) 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2019, 7 p.m. 17.0 ppb (16) 4.0 ppb (4) 16.4 ppb (15) 12.0 ppb (11) N/A 1.0 ppb (1) 28.0 ppb (22) 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 6 p.m. 16.0 ppb (15) 5.0 ppb (5) 15.5 ppb (14) 11.0 ppb (10) N/A 1.0 ppb (1) N/A 0.24 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 5 p.m. 13.0 ppb (12) 4.0 ppb (4) 12.6 ppb (12) 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.22 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 4 p.m. 20.0 ppb (19) 6.0 ppb (6) 18.8 ppb (17) 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 3 p.m. 36.0 ppb (33) 11.0 ppb (10) 35.7 ppb (33) 25.0 ppb (23) N/A 1.0 ppb (1) 17.0 ppb (13) N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 2 p.m. 43.0 ppb (40) 14.0 ppb (13) 42.5 ppb (39) 29.0 ppb (27) N/A 1.0 ppb (1) 16.0 ppb (12) N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 1 p.m. 65.0 ppb (62) 24.0 ppb (22) 65.0 ppb (62) 41.0 ppb (38) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 12.0 μg/m3 (50) 62.0
 
Jan. 18, 2019, noon 61.0 ppb (57) 19.0 ppb (18) 61.9 ppb (58) 42.0 ppb (39) N/A 1.0 ppb (1) 3.0 ppb (2) N/A N/A 9.0 μg/m3 (38) 58.0
 
Jan. 18, 2019, 11 a.m. 48.0 ppb (44) 10.0 ppb (9) 47.0 ppb (44) 38.0 ppb (35) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 10.0 μg/m3 (42) 44.0
 
Jan. 18, 2019, 10 a.m. 32.0 ppb (30) 4.0 ppb (4) 32.7 ppb (30) 28.0 ppb (26) N/A 0.0 ppb (0) 13.0 ppb (10) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 30.0
 
Jan. 18, 2019, 9 a.m. 38.0 ppb (35) 5.0 ppb (5) 37.5 ppb (35) 33.0 ppb (31) N/A 1.0 ppb (1) 10.0 ppb (8) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 8 a.m. 34.0 ppb (31) 4.0 ppb (4) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 11.0 ppb (8) 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 7 a.m. 22.0 ppb (20) 1.0 ppb (1) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 18.0 ppb (14) 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2019, 6 a.m. 21.0 ppb (19) 2.0 ppb (2) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 21.0 ppb (16) 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 5 a.m. 23.0 ppb (21) 2.0 ppb (2) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 18.0 ppb (14) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 4 a.m. 23.0 ppb (21) 2.0 ppb (2) 23.9 ppb (22) 22.0 ppb (20) N/A 0.0 ppb (0) 17.0 ppb (13) N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 3 a.m. 22.0 ppb (20) 2.0 ppb (2) 23.0 ppb (21) 20.0 ppb (19) N/A 0.0 ppb (0) 19.0 ppb (15) 0.26 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 2 a.m. 21.0 ppb (19) 2.0 ppb (2) 21.7 ppb (20) 19.0 ppb (18) N/A 0.0 ppb (0) 20.0 ppb (15) 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 1 a.m. 24.0 ppb (22) 3.0 ppb (3) 24.9 ppb (23) 22.0 ppb (20) N/A 0.0 ppb (0) 19.0 ppb (15) 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, midnight 25.0 ppb (23) 4.0 ppb (4) 24.6 ppb (23) 21.0 ppb (19) N/A 0.0 ppb (0) 19.0 ppb (15) 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, 11 p.m. 27.0 ppb (25) 4.0 ppb (4) 27.0 ppb (25) 23.0 ppb (21) N/A 1.0 ppb (1) 18.0 ppb (14) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 10 p.m. 38.0 ppb (35) 8.0 ppb (7) 37.3 ppb (35) 30.0 ppb (28) N/A 1.0 ppb (1) 12.0 ppb (9) 0.36 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 9 p.m. 40.0 ppb (37) 10.0 ppb (9) 37.5 ppb (35) 29.0 ppb (27) N/A 1.0 ppb (1) 14.0 ppb (11) 0.4 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, 8 p.m. 28.0 ppb (26) 7.0 ppb (6) 29.0 ppb (27) 21.0 ppb (19) N/A 1.0 ppb (1) 21.0 ppb (16) 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 7 p.m. 14.0 ppb (13) 4.0 ppb (4) 15.6 ppb (14) 10.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (25) 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 6 p.m. 16.0 ppb (15) 5.0 ppb (5) 15.7 ppb (15) 11.0 ppb (10) N/A 1.0 ppb (1) 31.0 ppb (24) 0.24 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 17, 2019, 5 p.m. 14.0 ppb (13) 4.0 ppb (4) 15.2 ppb (14) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.23 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 17, 2019, 4 p.m. 12.0 ppb (11) 4.0 ppb (4) 12.3 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, 3 p.m. 17.0 ppb (16) 6.0 ppb (6) 18.0 ppb (17) 11.0 ppb (10) N/A 1.0 ppb (1) 30.0 ppb (23) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 2 p.m. 21.0 ppb (19) 7.0 ppb (6) 20.6 ppb (19) 14.0 ppb (13) N/A 0.0 ppb (0) 27.0 ppb (21) 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, 1 p.m. 21.0 ppb (19) 6.0 ppb (6) 22.0 ppb (20) 15.0 ppb (14) N/A 0.0 ppb (0) 25.0 ppb (19) 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, noon 23.0 ppb (21) 6.0 ppb (6) 23.1 ppb (21) 17.0 ppb (16) N/A 0.0 ppb (0) 22.0 ppb (17) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 11 a.m. 14.0 ppb (13) 2.0 ppb (2) 14.3 ppb (13) 12.0 ppb (11) N/A 0.0 ppb (0) 26.0 ppb (20) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 20.0
 
Jan. 17, 2019, 10 a.m. 10.0 ppb (9) 1.0 ppb (1) 10.8 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (22) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 17, 2019, 9 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.4 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 17, 2019, 8 a.m. 9.0 ppb (8) 1.0 ppb (1) 8.5 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 30.0 ppb (23) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 7 a.m. 7.0 ppb (6) 1.0 ppb (1) 6.9 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 6 a.m. 7.0 ppb (6) 1.0 ppb (1) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 5 a.m. 15.0 ppb (14) 3.0 ppb (3) 15.1 ppb (14) 12.0 ppb (11) N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 4 a.m. 10.0 ppb (9) 1.0 ppb (1) 9.5 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 5.0 μg/m3 (21) 24.0
 
Jan. 17, 2019, 3 a.m. 13.0 ppb (12) 2.0 ppb (2) 13.4 ppb (12) 11.0 ppb (10) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 2 a.m. 23.0 ppb (21) 6.0 ppb (6) 21.4 ppb (20) 16.0 ppb (15) N/A 1.0 ppb (1) 18.0 ppb (14) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 1 a.m. 19.0 ppb (18) 3.0 ppb (3) 19.9 ppb (18) 16.0 ppb (15) N/A 1.0 ppb (1) 15.0 ppb (12) 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 17, 2019, midnight 19.0 ppb (18) 4.0 ppb (4) 18.8 ppb (17) 15.0 ppb (14) N/A 1.0 ppb (1) 17.0 ppb (13) 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 16, 2019, 11 p.m. 19.0 ppb (18) 4.0 ppb (4) 19.2 ppb (18) 15.0 ppb (14) N/A 0.0 ppb (0) 17.0 ppb (13) 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 16, 2019, 10 p.m. 25.0 ppb (23) 7.0 ppb (6) 24.5 ppb (23) 18.0 ppb (17) N/A 1.0 ppb (1) 16.0 ppb (12) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 16, 2019, 9 p.m. 20.0 ppb (19) 5.0 ppb (5) 20.9 ppb (19) 15.0 ppb (14) N/A 1.0 ppb (1) 19.0 ppb (15) 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 16, 2019, 8 p.m. 14.0 ppb (13) 4.0 ppb (4) 15.5 ppb (14) 10.0 ppb (9) N/A 1.0 ppb (1) 24.0 ppb (18) 0.28 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 7 p.m. 14.0 ppb (13) 4.0 ppb (4) 14.9 ppb (14) 11.0 ppb (10) N/A 1.0 ppb (1) 25.0 ppb (19) 0.27 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 6 p.m. 14.0 ppb (13) 4.0 ppb (4) 14.9 ppb (14) 10.0 ppb (9) N/A 1.0 ppb (1) 26.0 ppb (20) 0.25 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 5 p.m. 16.0 ppb (15) 6.0 ppb (6) 15.8 ppb (15) 10.0 ppb (9) N/A 1.0 ppb (1) 27.0 ppb (21) 0.24 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 4 p.m. 17.0 ppb (16) 5.0 ppb (5) 18.9 ppb (18) 12.0 ppb (11) N/A 1.0 ppb (1) 24.0 ppb (18) 0.25 ppb (3) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 16, 2019, 3 p.m. 20.0 ppb (19) 8.0 ppb (7) 22.3 ppb (21) 12.0 ppb (11) N/A 1.0 ppb (1) 22.0 ppb (17) 0.28 ppb (3) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 16, 2019, 2 p.m. 30.0 ppb (28) 13.0 ppb (12) 31.0 ppb (29) 17.0 ppb (16) N/A 1.0 ppb (1) 17.0 ppb (13) 0.32 ppb (4) N/A 25.0 μg/m3 (78) 78.0
 
Jan. 16, 2019, 1 p.m. 43.0 ppb (40) 18.0 ppb (17) 45.5 ppb (42) 25.0 ppb (23) N/A 1.0 ppb (1) 10.0 ppb (8) 0.38 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 16, 2019, noon 52.0 ppb (48) 21.0 ppb (19) 54.1 ppb (50) 31.0 ppb (29) N/A 1.0 ppb (1) 4.0 ppb (3) N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 11 a.m. 44.0 ppb (41) 14.0 ppb (13) 45.3 ppb (42) 30.0 ppb (28) N/A 1.0 ppb (1) 3.0 ppb (2) 0.43 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 10 a.m. 35.0 ppb (32) 8.0 ppb (7) 37.0 ppb (34) 28.0 ppb (26) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 9 a.m. N/A N/A 35.5 ppb (33) N/A N/A 0.0 ppb (0) 6.0 ppb (5) 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 16, 2019, 8 a.m. N/A N/A 40.8 ppb (38) N/A N/A 1.0 ppb (1) 4.0 ppb (3) 0.4 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 16, 2019, 7 a.m. N/A N/A 38.8 ppb (36) N/A N/A 0.0 ppb (0) 4.0 ppb (3) 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 6 a.m. 52.0 ppb (48) 17.0 ppb (16) 53.1 ppb (49) 35.0 ppb (32) N/A N/A 1.0 ppb (1) 0.5 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 5 a.m. 59.0 ppb (55) 22.0 ppb (20) 60.4 ppb (57) 37.0 ppb (34) N/A N/A 1.0 ppb (1) 0.51 ppb (6) N/A 14.0 μg/m3 (54) 57.0
 
Jan. 16, 2019, 4 a.m. 74.0 ppb (71) 34.0 ppb (31) 74.9 ppb (72) 40.0 ppb (37) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 15.0 μg/m3 (56) 72.0
 
Jan. 16, 2019, 3 a.m. 103.0 ppb (100) 60.0 ppb (56) 105.6 ppb (101) 43.0 ppb (40) N/A 1.0 ppb (1) 1.0 ppb (1) 0.93 ppb (10) N/A 17.0 μg/m3 (61) 101.0
 
Jan. 16, 2019, 2 a.m. 88.0 ppb (86) 46.0 ppb (43) 90.2 ppb (89) 42.0 ppb (39) N/A 1.0 ppb (1) 1.0 ppb (1) 0.92 ppb (10) N/A 14.0 μg/m3 (54) 89.0
 
Jan. 16, 2019, 1 a.m. 36.0 ppb (33) 8.0 ppb (7) 37.9 ppb (35) 28.0 ppb (26) N/A 0.0 ppb (0) 11.0 ppb (8) 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2019, midnight 18.0 ppb (17) 1.0 ppb (1) 18.9 ppb (18) 17.0 ppb (16) N/A 0.0 ppb (0) 22.0 ppb (17) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2019, 11 p.m. 23.0 ppb (21) 3.0 ppb (3) 23.3 ppb (22) 21.0 ppb (19) N/A 0.0 ppb (0) 19.0 ppb (15) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 15, 2019, 10 p.m. 20.0 ppb (19) 4.0 ppb (4) 19.9 ppb (18) 16.0 ppb (15) N/A 0.0 ppb (0) 23.0 ppb (18) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
Jan. 15, 2019, 9 p.m. 16.0 ppb (15) 3.0 ppb (3) 16.7 ppb (15) 13.0 ppb (12) N/A 0.0 ppb (0) 27.0 ppb (21) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
Jan. 15, 2019, 8 p.m. 12.0 ppb (11) 2.0 ppb (2) 11.8 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 7 p.m. 12.0 ppb (11) 3.0 ppb (3) 12.0 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 6 p.m. 16.0 ppb (15) 5.0 ppb (5) 16.0 ppb (15) 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 15, 2019, 5 p.m. 16.0 ppb (15) 6.0 ppb (6) 16.5 ppb (15) 10.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 15, 2019, 4 p.m. 21.0 ppb (19) 8.0 ppb (7) 22.4 ppb (21) 13.0 ppb (12) N/A 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 15, 2019, 3 p.m. 27.0 ppb (25) 11.0 ppb (10) 26.5 ppb (25) 16.0 ppb (15) N/A 1.0 ppb (1) 25.0 ppb (19) 0.23 ppb (3) N/A N/A 25.0
 
Jan. 15, 2019, 2 p.m. 26.0 ppb (24) 9.0 ppb (8) 26.1 ppb (24) 17.0 ppb (16) N/A 0.0 ppb (0) 23.0 ppb (18) 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2019, 1 p.m. 38.0 ppb (35) 13.0 ppb (12) 39.0 ppb (36) 25.0 ppb (23) N/A 1.0 ppb (1) 15.0 ppb (12) 0.31 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, noon 44.0 ppb (41) 13.0 ppb (12) 44.8 ppb (41) 30.0 ppb (28) N/A 1.0 ppb (1) 10.0 ppb (8) 0.35 ppb (4) N/A 8.0 μg/m3 (33) 41.0
 
Jan. 15, 2019, 11 a.m. 24.0 ppb (22) 4.0 ppb (4) 24.1 ppb (22) 20.0 ppb (19) N/A 0.0 ppb (0) 21.0 ppb (16) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0