AQSQID: 250250042

Site Name: Boston - Roxbury

Location: Boston (Harrison Ave), MA

Reporting: True, Located: True

Current AQI: 32.0

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
June 10, 2019, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.0 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
June 10, 2019, 9 p.m. 4.0 ppb (4) 1.0 ppb (1) 4.7 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 33.0
 
June 10, 2019, 8 p.m. 6.0 ppb (6) 1.0 ppb (1) 7.4 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 38.0
 
June 10, 2019, 7 p.m. 16.0 ppb (15) 4.0 ppb (4) 17.2 ppb (16) 12.0 ppb (11) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 10, 2019, 6 p.m. 34.0 ppb (31) 13.0 ppb (12) 33.0 ppb (31) 21.0 ppb (19) N/A 1.0 ppb (1) 32.0 ppb (25) 0.22 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 10, 2019, 5 p.m. 36.0 ppb (33) 16.0 ppb (15) 37.9 ppb (35) 20.0 ppb (19) N/A 1.0 ppb (1) 31.0 ppb (24) 0.23 ppb (3) N/A N/A 35.0
 
June 10, 2019, 4 p.m. 17.0 ppb (16) 5.0 ppb (5) 19.9 ppb (18) 13.0 ppb (12) N/A 0.0 ppb (0) 34.0 ppb (26) 0.2 ppb (2) N/A N/A 26.0
 
June 10, 2019, 3 p.m. 10.0 ppb (9) 3.0 ppb (3) 10.6 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) N/A N/A 29.0
 
June 10, 2019, 2 p.m. 12.0 ppb (11) 4.0 ppb (4) 13.6 ppb (13) 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A N/A 25.0
 
June 10, 2019, 1 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) 0.16 ppb (2) N/A N/A 24.0
 
June 10, 2019, noon 9.0 ppb (8) 3.0 ppb (3) 9.9 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) N/A N/A 22.0
 
June 10, 2019, 11 a.m. 10.0 ppb (9) 3.0 ppb (3) 11.1 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A N/A 20.0
 
June 10, 2019, 10 a.m. 13.0 ppb (12) 3.0 ppb (3) 14.6 ppb (14) 10.0 ppb (9) N/A 0.0 ppb (0) 21.0 ppb (16) 0.17 ppb (2) N/A N/A 16.0
 
June 10, 2019, 9 a.m. 11.0 ppb (10) 1.0 ppb (1) 12.6 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 18.0 ppb (14) 0.15 ppb (2) N/A N/A 14.0
 
June 10, 2019, 8 a.m. 8.0 ppb (7) 0.0 ppb (0) 7.8 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.13 ppb (1) N/A N/A 17.0
 
June 10, 2019, 7 a.m. 7.0 ppb (6) 1.0 ppb (1) 8.3 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) 0.13 ppb (1) N/A N/A 18.0
 
June 10, 2019, 6 a.m. 6.0 ppb (6) 0.0 ppb (0) 6.5 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) 0.12 ppb (1) N/A N/A 18.0
 
June 10, 2019, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) 6.9 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.13 ppb (1) N/A N/A 19.0
 
June 10, 2019, 4 a.m. 5.0 ppb (5) 0.0 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A N/A 21.0
 
June 10, 2019, 3 a.m. 5.0 ppb (5) 0.0 ppb (0) 5.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A N/A 22.0
 
June 10, 2019, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A N/A 24.0
 
June 10, 2019, 1 a.m. 5.0 ppb (5) 0.0 ppb (0) 5.5 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) N/A N/A 25.0
 
June 10, 2019, midnight 4.0 ppb (4) 0.0 ppb (0) 4.9 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.2 ppb (2) N/A N/A 28.0
 
June 9, 2019, 11 p.m. 3.0 ppb (3) 0.0 ppb (0) 3.5 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) 0.2 ppb (2) N/A N/A 31.0
 
June 9, 2019, 10 p.m. 3.0 ppb (3) 0.0 ppb (0) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) N/A N/A 35.0
 
June 9, 2019, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) 3.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) N/A N/A 38.0
 
June 9, 2019, 8 p.m. 3.0 ppb (3) 0.0 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (42) 0.16 ppb (2) N/A N/A 42.0
 
June 9, 2019, 7 p.m. 3.0 ppb (3) 0.0 ppb (0) 3.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 55.0 ppb (42) 0.17 ppb (2) N/A N/A 42.0
 
June 9, 2019, 6 p.m. 5.0 ppb (5) 1.0 ppb (1) 5.9 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) N/A N/A 38.0
 
June 9, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.16 ppb (2) N/A N/A 38.0
 
June 9, 2019, 4 p.m. 2.0 ppb (2) 0.0 ppb (0) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) N/A N/A 36.0
 
June 9, 2019, 3 p.m. 2.0 ppb (2) 0.0 ppb (0) 3.1 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) N/A N/A 36.0
 
June 9, 2019, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) 2.3 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) N/A N/A 35.0
 
June 9, 2019, 1 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.0 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) N/A N/A 32.0
 
June 9, 2019, noon 4.0 ppb (4) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) N/A N/A 28.0
 
June 9, 2019, 11 a.m. 6.0 ppb (6) 1.0 ppb (1) 7.5 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.2 ppb (2) N/A N/A 22.0
 
June 9, 2019, 10 a.m. 9.0 ppb (8) 1.0 ppb (1) 9.9 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A N/A 18.0
 
June 9, 2019, 9 a.m. 5.0 ppb (5) 0.0 ppb (0) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A N/A 20.0
 
June 9, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) 5.1 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.15 ppb (2) N/A N/A 5.0
 
June 9, 2019, 7 a.m. N/A N/A 5.5 ppb (5) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) N/A N/A 22.0
 
June 9, 2019, 6 a.m. N/A N/A 7.0 ppb (6) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) N/A N/A 22.0
 
June 9, 2019, 5 a.m. N/A N/A 5.4 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) N/A N/A 25.0
 
June 9, 2019, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.9 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A N/A 27.0
 
June 9, 2019, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.1 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.19 ppb (2) N/A N/A 25.0
 
June 9, 2019, 2 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.22 ppb (2) N/A N/A 26.0
 
June 9, 2019, 1 a.m. 7.0 ppb (6) 0.0 ppb (0) 7.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) 0.26 ppb (3) N/A N/A 28.0
 
June 9, 2019, midnight 6.0 ppb (6) 0.0 ppb (0) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.24 ppb (3) N/A N/A 29.0
 
June 8, 2019, 11 p.m. 7.0 ppb (6) 1.0 ppb (1) 7.5 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.22 ppb (2) N/A N/A 30.0
 
June 8, 2019, 10 p.m. 10.0 ppb (9) 1.0 ppb (1) 11.0 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (28) 0.28 ppb (3) N/A N/A 28.0
 
June 8, 2019, 9 p.m. 7.0 ppb (6) 1.0 ppb (1) 8.4 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.22 ppb (2) N/A N/A 29.0
 
June 8, 2019, 8 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.15 ppb (2) N/A N/A 32.0
 
June 8, 2019, 7 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.1 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) N/A N/A 32.0
 
June 8, 2019, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A N/A 30.0
 
June 8, 2019, 5 p.m. 5.0 ppb (5) 1.0 ppb (1) 5.4 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A N/A 28.0
 
June 8, 2019, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.2 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A N/A 28.0
 
June 8, 2019, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) 6.0 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A N/A 27.0
 
June 8, 2019, 2 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.3 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A N/A 26.0
 
June 8, 2019, 1 p.m. 8.0 ppb (7) 2.0 ppb (2) 8.7 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A N/A 25.0
 
June 8, 2019, noon 6.0 ppb (6) 2.0 ppb (2) 7.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) N/A N/A 25.0
 
June 8, 2019, 11 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.9 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A N/A 25.0
 
June 8, 2019, 10 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.6 ppb (8) 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.14 ppb (2) N/A N/A 24.0
 
June 8, 2019, 9 a.m. 7.0 ppb (6) 1.0 ppb (1) 6.7 ppb (6) 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.14 ppb (2) N/A N/A 25.0
 
June 8, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.14 ppb (2) N/A N/A 25.0
 
June 8, 2019, 7 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A N/A 19.0
 
June 8, 2019, 6 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (17) 0.27 ppb (3) N/A N/A 17.0
 
June 8, 2019, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.25 ppb (3) N/A N/A 22.0
 
June 8, 2019, 4 a.m. 8.0 ppb (7) 0.0 ppb (0) 9.6 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (22) 0.21 ppb (2) N/A N/A 22.0
 
June 8, 2019, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) 7.1 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) N/A N/A 25.0
 
June 8, 2019, 2 a.m. 5.0 ppb (5) 0.0 ppb (0) 5.7 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) N/A N/A 27.0
 
June 8, 2019, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) 5.2 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.22 ppb (2) N/A N/A 29.0
 
June 8, 2019, midnight 5.0 ppb (5) 0.0 ppb (0) 5.5 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) 0.23 ppb (3) N/A N/A 32.0
 
June 7, 2019, 11 p.m. 6.0 ppb (6) 1.0 ppb (1) 7.5 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 43.0 ppb (33) 0.26 ppb (3) N/A N/A 33.0
 
June 7, 2019, 10 p.m. 7.0 ppb (6) 1.0 ppb (1) 7.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) 0.25 ppb (3) N/A N/A 35.0
 
June 7, 2019, 9 p.m. 11.0 ppb (10) 2.0 ppb (2) 12.1 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 37.0 ppb (28) 0.23 ppb (3) N/A N/A 28.0
 
June 7, 2019, 8 p.m. 11.0 ppb (10) 3.0 ppb (3) 11.8 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A N/A 28.0
 
June 7, 2019, 7 p.m. 12.0 ppb (11) 3.0 ppb (3) 12.2 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) N/A N/A 30.0
 
June 7, 2019, 6 p.m. 11.0 ppb (10) 3.0 ppb (3) 12.2 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) 0.19 ppb (2) N/A N/A 29.0
 
June 7, 2019, 5 p.m. 10.0 ppb (9) 3.0 ppb (3) 11.1 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) N/A N/A 30.0
 
June 7, 2019, 4 p.m. 9.0 ppb (8) 3.0 ppb (3) 10.4 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) N/A N/A 31.0
 
June 7, 2019, 3 p.m. 9.0 ppb (8) 2.0 ppb (2) 9.8 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A N/A 30.0
 
June 7, 2019, 2 p.m. 15.0 ppb (14) 4.0 ppb (4) 14.6 ppb (14) 10.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (25) 0.17 ppb (2) N/A N/A 25.0
 
June 7, 2019, 1 p.m. 19.0 ppb (18) 6.0 ppb (6) 20.2 ppb (19) 13.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (22) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 7, 2019, noon 19.0 ppb (18) 6.0 ppb (6) 19.8 ppb (18) 13.0 ppb (12) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
June 7, 2019, 11 a.m. 18.0 ppb (17) 5.0 ppb (5) 19.8 ppb (18) 14.0 ppb (13) N/A 0.0 ppb (0) 24.0 ppb (18) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 7, 2019, 10 a.m. 21.0 ppb (19) 5.0 ppb (5) 23.5 ppb (22) 16.0 ppb (15) N/A 0.0 ppb (0) 15.0 ppb (12) 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
June 7, 2019, 9 a.m. 10.0 ppb (9) 1.0 ppb (1) 11.2 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 7, 2019, 8 a.m. 9.0 ppb (8) 0.0 ppb (0) 10.5 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (17) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 7, 2019, 7 a.m. 10.0 ppb (9) 1.0 ppb (1) 11.6 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 7, 2019, 6 a.m. 7.0 ppb (6) 0.0 ppb (0) 7.5 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 7, 2019, 5 a.m. 10.0 ppb (9) 0.0 ppb (0) 11.7 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 7, 2019, 4 a.m. 9.0 ppb (8) 0.0 ppb (0) 10.8 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (22) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 7, 2019, 3 a.m. 7.0 ppb (6) 0.0 ppb (0) 7.8 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 24.0
 
June 7, 2019, 2 a.m. 7.0 ppb (6) 0.0 ppb (0) 7.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 7, 2019, 1 a.m. 8.0 ppb (7) 0.0 ppb (0) 8.9 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
June 7, 2019, midnight 10.0 ppb (9) 1.0 ppb (1) 11.8 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (23) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 6, 2019, 11 p.m. 8.0 ppb (7) 1.0 ppb (1) 9.2 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 6, 2019, 10 p.m. 6.0 ppb (6) 1.0 ppb (1) 7.3 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (29) 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
June 6, 2019, 9 p.m. 6.0 ppb (6) 1.0 ppb (1) 7.5 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 6, 2019, 8 p.m. 7.0 ppb (6) 2.0 ppb (2) 8.0 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 6, 2019, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) 7.1 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 6, 2019, 6 p.m. 8.0 ppb (7) 2.0 ppb (2) 9.0 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 32.0
 
June 6, 2019, 5 p.m. 17.0 ppb (16) 6.0 ppb (6) 18.1 ppb (17) 11.0 ppb (10) N/A 1.0 ppb (1) 31.0 ppb (24) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
June 6, 2019, 4 p.m. 21.0 ppb (19) 6.0 ppb (6) 24.1 ppb (22) 15.0 ppb (14) N/A 0.0 ppb (0) 24.0 ppb (18) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
June 6, 2019, 3 p.m. 9.0 ppb (8) 2.0 ppb (2) 10.0 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 6, 2019, 2 p.m. 10.0 ppb (9) 2.0 ppb (2) 11.0 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (22) 0.24 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
June 6, 2019, 1 p.m. 8.0 ppb (7) 2.0 ppb (2) 9.2 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.25 ppb (3) N/A N/A 26.0
 
June 6, 2019, noon 9.0 ppb (8) 2.0 ppb (2) 10.4 ppb (10) 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
June 6, 2019, 11 a.m. 10.0 ppb (9) 1.0 ppb (1) 11.9 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 6, 2019, 10 a.m. 8.0 ppb (7) 1.0 ppb (1) 9.1 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 6.0 μg/m3 (25) 26.0
 
June 6, 2019, 9 a.m. 5.0 ppb (5) 2.0 ppb (2) 6.7 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 30.0
 
June 6, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 6, 2019, 7 a.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.16 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 6, 2019, 6 a.m. N/A N/A 2.7 ppb (3) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
June 6, 2019, 5 a.m. N/A N/A 2.7 ppb (3) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.15 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 6, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.6 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 6, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.9 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (34) 0.17 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
June 6, 2019, 2 a.m. 5.0 ppb (5) 0.0 ppb (0) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.19 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
June 6, 2019, 1 a.m. 8.0 ppb (7) 0.0 ppb (0) 9.2 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 44.0 ppb (34) 0.28 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
June 6, 2019, midnight 6.0 ppb (6) 0.0 ppb (0) 7.2 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
June 5, 2019, 11 p.m. 6.0 ppb (6) 0.0 ppb (0) 7.5 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 53.0 ppb (41) 0.28 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
June 5, 2019, 10 p.m. 6.0 ppb (6) 0.0 ppb (0) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 58.0 ppb (45) 0.28 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
June 5, 2019, 9 p.m. 7.0 ppb (6) 1.0 ppb (1) 8.3 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 59.0 ppb (45) 0.27 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
June 5, 2019, 8 p.m. 7.0 ppb (6) 1.0 ppb (1) 9.4 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 61.0 ppb (47) 0.29 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
June 5, 2019, 7 p.m. 6.0 ppb (6) 0.0 ppb (0) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 69.0 ppb (53) 0.25 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
June 5, 2019, 6 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.6 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 67.0 ppb (52) 0.24 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
June 5, 2019, 5 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.8 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 63.0 ppb (48) 0.22 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
June 5, 2019, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) 6.4 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 61.0 ppb (47) 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
June 5, 2019, 3 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.9 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 55.0 ppb (42) 0.19 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
June 5, 2019, 2 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
June 5, 2019, 1 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
June 5, 2019, noon 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 5, 2019, 11 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
June 5, 2019, 10 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.1 ppb (8) 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.15 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 5, 2019, 9 a.m. 5.0 ppb (5) 0.0 ppb (0) 6.0 ppb (6) 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.14 ppb (2) N/A 7.0 μg/m3 (29) 33.0
 
June 5, 2019, 8 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.13 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
June 5, 2019, 7 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 29.0
 
June 5, 2019, 6 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) N/A 6.0 μg/m3 (25) 30.0
 
June 5, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) 0.12 ppb (1) N/A 7.0 μg/m3 (29) 32.0
 
June 5, 2019, 4 a.m. 6.0 ppb (6) 1.0 ppb (1) 5.8 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) N/A 5.0 μg/m3 (21) 32.0
 
June 5, 2019, 3 a.m. 5.0 ppb (5) 0.0 ppb (0) 5.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
June 5, 2019, 2 a.m. 7.0 ppb (6) 0.0 ppb (0) 7.8 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 5, 2019, 1 a.m. 10.0 ppb (9) 1.0 ppb (1) 10.7 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (22) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 5, 2019, midnight 9.0 ppb (8) 1.0 ppb (1) 9.6 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (24) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
June 4, 2019, 11 p.m. 8.0 ppb (7) 1.0 ppb (1) 8.2 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 26.0
 
June 4, 2019, 10 p.m. 11.0 ppb (10) 2.0 ppb (2) 11.1 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
June 4, 2019, 9 p.m. 11.0 ppb (10) 3.0 ppb (3) 11.3 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 4, 2019, 8 p.m. 11.0 ppb (10) 3.0 ppb (3) 12.0 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 4, 2019, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.3 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 4, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) 6.9 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
June 4, 2019, 5 p.m. 5.0 ppb (5) 1.0 ppb (1) 5.7 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 5.0 μg/m3 (21) 27.0
 
June 4, 2019, 4 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.4 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 27.0
 
June 4, 2019, 3 p.m. 7.0 ppb (6) 2.0 ppb (2) 7.1 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 4, 2019, 2 p.m. 8.0 ppb (7) 3.0 ppb (3) 8.9 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 4, 2019, 1 p.m. 7.0 ppb (6) 2.0 ppb (2) 7.6 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
June 4, 2019, noon 13.0 ppb (12) 5.0 ppb (5) 13.8 ppb (13) 8.0 ppb (7) N/A 0.0 ppb (0) 23.0 ppb (18) 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 4, 2019, 11 a.m. 16.0 ppb (15) 5.0 ppb (5) 17.0 ppb (16) 11.0 ppb (10) N/A 0.0 ppb (0) 21.0 ppb (16) 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 4, 2019, 10 a.m. 19.0 ppb (18) 6.0 ppb (6) 20.1 ppb (19) 13.0 ppb (12) N/A 0.0 ppb (0) 18.0 ppb (14) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
June 4, 2019, 9 a.m. 10.0 ppb (9) 1.0 ppb (1) 10.7 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 4, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.8 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 4, 2019, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
June 4, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
June 4, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.12 ppb (1) N/A 4.0 μg/m3 (17) 21.0
 
June 4, 2019, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.3 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 4, 2019, 3 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.6 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (18) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 4, 2019, 2 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.3 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (18) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 4, 2019, 1 a.m. 8.0 ppb (7) 2.0 ppb (2) 7.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 17.0
 
June 4, 2019, midnight 17.0 ppb (16) 5.0 ppb (5) 17.5 ppb (16) 11.0 ppb (10) N/A 0.0 ppb (0) 19.0 ppb (15) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 16.0
 
June 3, 2019, 11 p.m. 12.0 ppb (11) 3.0 ppb (3) 12.1 ppb (11) 8.0 ppb (7) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 19.0