AQSQID: 250250042

Site Name: Boston - Roxbury

Location: Boston (Harrison Ave), MA

Reporting: True, Located: True

Current AQI: 42.0

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
Sept. 21, 2019, 9 a.m. 14.0 ppb (13) 2.0 ppb (2) 14.7 ppb (14) 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 8 a.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A 21.0 ppb (16) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 7 a.m. 25.0 ppb (23) 9.0 ppb (8) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 17.0 ppb (13) 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2019, 6 a.m. 30.0 ppb (28) 11.0 ppb (10) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 13.0 ppb (10) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
Sept. 21, 2019, 5 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (17) 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2019, 4 a.m. 14.0 ppb (13) 2.0 ppb (2) 15.2 ppb (14) 12.0 ppb (11) N/A 0.0 ppb (0) 19.0 ppb (15) 0.29 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 21, 2019, 3 a.m. 17.0 ppb (16) 2.0 ppb (2) 19.3 ppb (18) 16.0 ppb (15) N/A 0.0 ppb (0) 14.0 ppb (11) 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 2 a.m. 15.0 ppb (14) 2.0 ppb (2) 16.6 ppb (15) 13.0 ppb (12) N/A 0.0 ppb (0) 16.0 ppb (12) 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2019, 1 a.m. 16.0 ppb (15) 2.0 ppb (2) 17.6 ppb (16) 14.0 ppb (13) N/A 0.0 ppb (0) 18.0 ppb (14) 0.36 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 21, 2019, midnight 20.0 ppb (19) 2.0 ppb (2) 21.4 ppb (20) 17.0 ppb (16) N/A 0.0 ppb (0) 20.0 ppb (15) 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2019, 11 p.m. 35.0 ppb (32) 5.0 ppb (5) 40.0 ppb (37) 30.0 ppb (28) N/A 0.0 ppb (0) 11.0 ppb (8) 0.55 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2019, 10 p.m. 16.0 ppb (15) 2.0 ppb (2) 18.5 ppb (17) 14.0 ppb (13) N/A 0.0 ppb (0) 30.0 ppb (23) 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2019, 9 p.m. 14.0 ppb (13) 3.0 ppb (3) 15.5 ppb (14) 11.0 ppb (10) N/A 0.0 ppb (0) 38.0 ppb (29) 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2019, 8 p.m. 8.0 ppb (7) 2.0 ppb (2) 10.4 ppb (10) 6.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 35.0
 
Sept. 20, 2019, 7 p.m. 9.0 ppb (8) 3.0 ppb (3) 9.5 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 35.0
 
Sept. 20, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) 8.6 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 34.0
 
Sept. 20, 2019, 5 p.m. 8.0 ppb (7) 3.0 ppb (3) 8.5 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
Sept. 20, 2019, 4 p.m. 10.0 ppb (9) 4.0 ppb (4) 10.8 ppb (10) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 26.0
 
Sept. 20, 2019, 3 p.m. 11.0 ppb (10) 5.0 ppb (5) 12.1 ppb (11) 7.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2019, 2 p.m. 19.0 ppb (18) 8.0 ppb (7) 20.3 ppb (19) 11.0 ppb (10) N/A 0.0 ppb (0) 21.0 ppb (16) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2019, 1 p.m. 29.0 ppb (27) 14.0 ppb (13) 30.9 ppb (29) 15.0 ppb (14) N/A 0.0 ppb (0) 13.0 ppb (10) 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2019, 6 a.m. 15.0 ppb (14) 2.0 ppb (2) 15.8 ppb (15) 13.0 ppb (12) N/A 0.0 ppb (0) 9.0 ppb (7) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2019, 5 a.m. 15.0 ppb (14) 2.0 ppb (2) 16.7 ppb (15) 13.0 ppb (12) N/A 0.0 ppb (0) 10.0 ppb (8) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2019, 4 a.m. 16.0 ppb (15) 2.0 ppb (2) 17.2 ppb (16) 14.0 ppb (13) N/A 0.0 ppb (0) 12.0 ppb (9) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2019, 3 a.m. 13.0 ppb (12) 2.0 ppb (2) 14.4 ppb (13) 11.0 ppb (10) N/A 0.0 ppb (0) 15.0 ppb (12) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2019, 2 a.m. 18.0 ppb (17) 2.0 ppb (2) 19.8 ppb (18) 16.0 ppb (15) N/A 0.0 ppb (0) 11.0 ppb (8) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2019, 1 a.m. 22.0 ppb (20) 3.0 ppb (3) 23.6 ppb (22) 19.0 ppb (18) N/A 0.0 ppb (0) 9.0 ppb (7) 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2019, midnight 25.0 ppb (23) 4.0 ppb (4) 26.4 ppb (24) 21.0 ppb (19) N/A 0.0 ppb (0) 9.0 ppb (7) 0.38 ppb (4) N/A 4.0 μg/m3 (17) 24.0
 
Sept. 19, 2019, 11 p.m. 19.0 ppb (18) 3.0 ppb (3) 21.4 ppb (20) 17.0 ppb (16) N/A 0.0 ppb (0) 16.0 ppb (12) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2019, 10 p.m. 13.0 ppb (12) 3.0 ppb (3) 15.3 ppb (14) 11.0 ppb (10) N/A 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 9 p.m. 10.0 ppb (9) 3.0 ppb (3) 11.1 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Sept. 19, 2019, 8 p.m. 9.0 ppb (8) 4.0 ppb (4) 9.3 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (23) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 23.0
 
Sept. 19, 2019, 7 p.m. 10.0 ppb (9) 4.0 ppb (4) 10.1 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 23.0
 
Sept. 19, 2019, 6 p.m. 12.0 ppb (11) 5.0 ppb (5) 12.1 ppb (11) 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 19, 2019, 5 p.m. 12.0 ppb (11) 6.0 ppb (6) 12.1 ppb (11) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2019, 4 p.m. 11.0 ppb (10) 5.0 ppb (5) 11.1 ppb (10) 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 20.0
 
Sept. 19, 2019, 3 p.m. 13.0 ppb (12) 6.0 ppb (6) 12.5 ppb (12) 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2019, 2 p.m. 15.0 ppb (14) 7.0 ppb (6) 15.2 ppb (14) 8.0 ppb (7) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 1 p.m. 29.0 ppb (27) 15.0 ppb (14) 30.7 ppb (28) 14.0 ppb (13) N/A 1.0 ppb (1) 12.0 ppb (9) 0.28 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 19, 2019, noon 34.0 ppb (31) 19.0 ppb (18) 36.4 ppb (34) 16.0 ppb (15) N/A 1.0 ppb (1) 7.0 ppb (5) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 34.0
 
Sept. 19, 2019, 11 a.m. 47.0 ppb (44) 28.0 ppb (26) 49.1 ppb (45) 19.0 ppb (18) N/A 1.0 ppb (1) 2.0 ppb (2) 0.31 ppb (3) N/A 8.0 μg/m3 (33) 45.0
 
Sept. 19, 2019, 10 a.m. 29.0 ppb (27) 11.0 ppb (10) 29.9 ppb (28) 18.0 ppb (17) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 6.0 μg/m3 (25) 28.0
 
Sept. 19, 2019, 9 a.m. 23.0 ppb (21) 7.0 ppb (6) 24.0 ppb (22) 16.0 ppb (15) N/A 0.0 ppb (0) 4.0 ppb (3) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 19, 2019, 8 a.m. 23.0 ppb (21) 7.0 ppb (6) 25.0 ppb (23) 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2019, 7 a.m. N/A N/A 24.3 ppb (23) N/A N/A 0.0 ppb (0) 5.0 ppb (4) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 6 a.m. N/A N/A 41.1 ppb (38) N/A N/A 1.0 ppb (1) 0.0 ppb (0) 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2019, 5 a.m. N/A N/A 28.2 ppb (26) N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
Sept. 19, 2019, 4 a.m. 11.0 ppb (10) 2.0 ppb (2) 11.6 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 15.0
 
Sept. 19, 2019, 3 a.m. 16.0 ppb (15) 2.0 ppb (2) 16.7 ppb (15) 14.0 ppb (13) N/A 0.0 ppb (0) 16.0 ppb (12) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 15.0
 
Sept. 19, 2019, 2 a.m. 14.0 ppb (13) 2.0 ppb (2) 14.2 ppb (13) 12.0 ppb (11) N/A 0.0 ppb (0) 18.0 ppb (14) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2019, 1 a.m. 14.0 ppb (13) 2.0 ppb (2) 13.6 ppb (13) 11.0 ppb (10) N/A 0.0 ppb (0) 20.0 ppb (15) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2019, midnight 14.0 ppb (13) 2.0 ppb (2) 14.5 ppb (13) 12.0 ppb (11) N/A 0.0 ppb (0) 21.0 ppb (16) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 16.0
 
Sept. 18, 2019, 11 p.m. 14.0 ppb (13) 2.0 ppb (2) 15.2 ppb (14) 12.0 ppb (11) N/A 0.0 ppb (0) 21.0 ppb (16) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 10 p.m. 9.0 ppb (8) 2.0 ppb (2) 9.2 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Sept. 18, 2019, 9 p.m. 8.0 ppb (7) 3.0 ppb (3) 8.8 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 18, 2019, 8 p.m. 8.0 ppb (7) 4.0 ppb (4) 7.0 ppb (6) 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 7 p.m. 6.0 ppb (6) 3.0 ppb (3) 5.8 ppb (5) 3.0 ppb (3) N/A N/A 28.0 ppb (22) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 18, 2019, 6 p.m. 7.0 ppb (6) 4.0 ppb (4) 7.5 ppb (7) 3.0 ppb (3) N/A N/A 28.0 ppb (22) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 5 p.m. 7.0 ppb (6) 4.0 ppb (4) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 4 p.m. 7.0 ppb (6) 4.0 ppb (4) 6.5 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, 3 p.m. 9.0 ppb (8) 4.0 ppb (4) 8.7 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Sept. 18, 2019, 2 p.m. 9.0 ppb (8) 4.0 ppb (4) 8.7 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 17.0
 
Sept. 18, 2019, 1 p.m. 9.0 ppb (8) 5.0 ppb (5) 8.8 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, noon 14.0 ppb (13) 7.0 ppb (6) 14.0 ppb (13) 7.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (12) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 13.0
 
Sept. 18, 2019, 11 a.m. 14.0 ppb (13) 5.0 ppb (5) 13.8 ppb (13) 9.0 ppb (8) N/A 0.0 ppb (0) 14.0 ppb (11) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 13.0
 
Sept. 18, 2019, 10 a.m. 8.0 ppb (7) 3.0 ppb (3) 8.3 ppb (8) 6.0 ppb (6) N/A N/A 17.0 ppb (13) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 9 a.m. 7.0 ppb (6) 2.0 ppb (2) 7.6 ppb (7) 6.0 ppb (6) N/A N/A 19.0 ppb (15) 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, 8 a.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.12 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 7 a.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) 0.11 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 14.0
 
Sept. 18, 2019, 5 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 15.0
 
Sept. 18, 2019, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) 3.9 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 3 a.m. 6.0 ppb (6) 2.0 ppb (2) 6.2 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 2 a.m. 6.0 ppb (6) 2.0 ppb (2) 6.2 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 13.0 ppb (10) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, 1 a.m. 6.0 ppb (6) 2.0 ppb (2) 6.3 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, midnight 7.0 ppb (6) 3.0 ppb (3) 7.6 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 17, 2019, 11 p.m. 7.0 ppb (6) 3.0 ppb (3) 7.2 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 17, 2019, 10 p.m. 11.0 ppb (10) 4.0 ppb (4) 11.6 ppb (11) 7.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (10) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 9 p.m. 10.0 ppb (9) 5.0 ppb (5) 11.1 ppb (10) 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 8 p.m. 10.0 ppb (9) 5.0 ppb (5) 11.2 ppb (10) 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2019, 7 p.m. 11.0 ppb (10) 5.0 ppb (5) 11.0 ppb (10) 5.0 ppb (5) N/A 0.0 ppb (0) 15.0 ppb (12) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 6 p.m. 12.0 ppb (11) 6.0 ppb (6) 12.6 ppb (12) 5.0 ppb (5) N/A 0.0 ppb (0) 15.0 ppb (12) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 17, 2019, 5 p.m. 11.0 ppb (10) 6.0 ppb (6) 11.9 ppb (11) 5.0 ppb (5) N/A 0.0 ppb (0) 16.0 ppb (12) 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2019, 4 p.m. 10.0 ppb (9) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (15) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 17, 2019, 3 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, 2 p.m. 9.0 ppb (8) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 1 p.m. 12.0 ppb (11) 6.0 ppb (6) 11.2 ppb (10) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) N/A N/A 15.0
 
Sept. 17, 2019, noon 18.0 ppb (17) 7.0 ppb (6) 18.7 ppb (17) 10.0 ppb (9) N/A 0.0 ppb (0) 16.0 ppb (12) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2019, 11 a.m. 29.0 ppb (27) 13.0 ppb (12) 31.6 ppb (29) 16.0 ppb (15) N/A 0.0 ppb (0) 10.0 ppb (8) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 29.0
 
Sept. 17, 2019, 10 a.m. 37.0 ppb (34) 15.0 ppb (14) 38.4 ppb (36) 22.0 ppb (20) N/A 0.0 ppb (0) 6.0 ppb (5) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 36.0
 
Sept. 17, 2019, 9 a.m. 23.0 ppb (21) 8.0 ppb (7) 25.8 ppb (24) 15.0 ppb (14) N/A 0.0 ppb (0) 12.0 ppb (9) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
Sept. 17, 2019, 8 a.m. 13.0 ppb (12) 3.0 ppb (3) 14.0 ppb (13) 10.0 ppb (9) N/A 0.0 ppb (0) 16.0 ppb (12) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 7 a.m. 7.0 ppb (6) 2.0 ppb (2) 6.5 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.12 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 6 a.m. 15.0 ppb (14) 3.0 ppb (3) 16.6 ppb (15) 11.0 ppb (10) N/A 0.0 ppb (0) 16.0 ppb (12) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 5 a.m. 11.0 ppb (10) 3.0 ppb (3) 12.3 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 18.0 ppb (14) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 4 a.m. 22.0 ppb (20) 7.0 ppb (6) 22.3 ppb (21) 15.0 ppb (14) N/A 0.0 ppb (0) 11.0 ppb (8) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 17, 2019, 3 a.m. 48.0 ppb (44) 26.0 ppb (24) 45.5 ppb (42) 22.0 ppb (20) N/A 1.0 ppb (1) 7.0 ppb (5) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 44.0
 
Sept. 17, 2019, 2 a.m. 24.0 ppb (22) 9.0 ppb (8) 27.3 ppb (25) 15.0 ppb (14) N/A 0.0 ppb (0) 15.0 ppb (12) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 17, 2019, 1 a.m. 11.0 ppb (10) 2.0 ppb (2) 12.0 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, midnight 10.0 ppb (9) 2.0 ppb (2) 10.8 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 22.0 ppb (17) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 11 p.m. 7.0 ppb (6) 2.0 ppb (2) 6.9 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 10 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.6 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 9 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.4 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 22.0
 
Sept. 16, 2019, 8 p.m. 8.0 ppb (7) 4.0 ppb (4) 8.8 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 16, 2019, 7 p.m. 8.0 ppb (7) 4.0 ppb (4) 9.1 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 16, 2019, 6 p.m. 5.0 ppb (5) 3.0 ppb (3) 5.1 ppb (5) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 24.0
 
Sept. 16, 2019, 5 p.m. 8.0 ppb (7) 4.0 ppb (4) 8.2 ppb (8) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 16, 2019, 4 p.m. 6.0 ppb (6) 3.0 ppb (3) 6.4 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 3 p.m. 6.0 ppb (6) 3.0 ppb (3) 6.5 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 22.0
 
Sept. 16, 2019, 2 p.m. 6.0 ppb (6) 3.0 ppb (3) 6.0 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 16, 2019, 1 p.m. 9.0 ppb (8) 5.0 ppb (5) 9.3 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, noon 12.0 ppb (11) 5.0 ppb (5) 10.7 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 11 a.m. 11.0 ppb (10) 3.0 ppb (3) 11.8 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 10 a.m. 10.0 ppb (9) 3.0 ppb (3) 10.0 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 9 a.m. 10.0 ppb (9) 2.0 ppb (2) 10.5 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 8 a.m. 9.0 ppb (8) 2.0 ppb (2) 9.8 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 7 a.m. N/A N/A 16.4 ppb (15) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 6 a.m. N/A N/A 10.6 ppb (10) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 5 a.m. N/A N/A 16.1 ppb (15) N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 4 a.m. 21.0 ppb (19) 7.0 ppb (6) 25.1 ppb (23) 14.0 ppb (13) N/A 0.0 ppb (0) 16.0 ppb (12) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 3 a.m. 10.0 ppb (9) 1.0 ppb (1) 11.5 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (17) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 2 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.7 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 21.0
 
Sept. 16, 2019, 1 a.m. 9.0 ppb (8) 2.0 ppb (2) 10.2 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, midnight 8.0 ppb (7) 2.0 ppb (2) 9.4 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 11 p.m. 7.0 ppb (6) 2.0 ppb (2) 8.3 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2019, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.4 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 15, 2019, 9 p.m. 3.0 ppb (3) 2.0 ppb (2) 4.0 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
Sept. 15, 2019, 8 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.3 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
Sept. 15, 2019, 7 p.m. 3.0 ppb (3) 2.0 ppb (2) 3.8 ppb (4) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
Sept. 15, 2019, 6 p.m. 3.0 ppb (3) 2.0 ppb (2) 2.7 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
Sept. 15, 2019, 5 p.m. 3.0 ppb (3) 2.0 ppb (2) 2.8 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
Sept. 15, 2019, 4 p.m. 3.0 ppb (3) 2.0 ppb (2) 2.7 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
Sept. 15, 2019, 3 p.m. 4.0 ppb (4) 2.0 ppb (2) 3.9 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 2 p.m. 5.0 ppb (5) 3.0 ppb (3) 5.7 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 25.0
 
Sept. 15, 2019, 1 p.m. 7.0 ppb (6) 3.0 ppb (3) 7.9 ppb (7) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 19.0
 
Sept. 15, 2019, noon 4.0 ppb (4) 2.0 ppb (2) 4.6 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (16) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 16.0
 
Sept. 15, 2019, 11 a.m. 6.0 ppb (6) 2.0 ppb (2) 7.0 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 17.0 ppb (13) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
Sept. 15, 2019, 10 a.m. 7.0 ppb (6) 2.0 ppb (2) 7.7 ppb (7) 4.0 ppb (4) N/A N/A 14.0 ppb (11) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 15, 2019, 9 a.m. 4.0 ppb (4) 2.0 ppb (2) 5.1 ppb (5) 3.0 ppb (3) N/A N/A 15.0 ppb (12) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 12.0
 
Sept. 15, 2019, 8 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 18.0 ppb (14) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 14.0
 
Sept. 15, 2019, 7 a.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 17.0 ppb (13) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 13.0
 
Sept. 15, 2019, 6 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (15) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 15.0
 
Sept. 15, 2019, 5 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 15, 2019, 4 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.9 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 3 a.m. 4.0 ppb (4) 1.0 ppb (1) 4.3 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 19.0
 
Sept. 15, 2019, 2 a.m. 5.0 ppb (5) 2.0 ppb (2) 5.0 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Sept. 15, 2019, 1 a.m. 5.0 ppb (5) 2.0 ppb (2) 6.0 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) 0.22 ppb (2) N/A 3.0 μg/m3 (12) 19.0
 
Sept. 15, 2019, midnight 7.0 ppb (6) 2.0 ppb (2) 7.3 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 14, 2019, 11 p.m. 8.0 ppb (7) 2.0 ppb (2) 8.4 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 10 p.m. 7.0 ppb (6) 2.0 ppb (2) 7.6 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 9 p.m. 7.0 ppb (6) 3.0 ppb (3) 8.0 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (18) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 14, 2019, 8 p.m. 5.0 ppb (5) 2.0 ppb (2) 6.0 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 14, 2019, 7 p.m. 6.0 ppb (6) 3.0 ppb (3) 6.3 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 14, 2019, 6 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.6 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 14, 2019, 5 p.m. 6.0 ppb (6) 3.0 ppb (3) 5.1 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 4 p.m. 5.0 ppb (5) 2.0 ppb (2) 4.6 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 3 p.m. 5.0 ppb (5) 3.0 ppb (3) 5.3 ppb (5) 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
Sept. 14, 2019, 2 p.m. 6.0 ppb (6) 3.0 ppb (3) 5.7 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 14, 2019, 1 p.m. 9.0 ppb (8) 4.0 ppb (4) 9.7 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (14) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 14, 2019, noon 13.0 ppb (12) 5.0 ppb (5) 12.9 ppb (12) 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2019, 11 a.m. 14.0 ppb (13) 4.0 ppb (4) 14.4 ppb (13) 10.0 ppb (9) N/A 0.0 ppb (0) 12.0 ppb (9) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 10 a.m. 18.0 ppb (17) 5.0 ppb (5) 18.4 ppb (17) 13.0 ppb (12) N/A 0.0 ppb (0) 6.0 ppb (5) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 17.0