ID: 485

AQSQID: 250250042

Site Name: Boston - Roxbury

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

Updated: July 5, 2020, 2:34 p.m.

Location: Roxbury (Roxbury), MA

Reporting: True, Located: True

Current AQI: 46.0

Roxbury (Roxbury) MA, US: 42.329399, -71.082497

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
June 28, 2020, noon 3.0 ppb (3) 2.0 ppb (2) 3.7 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) 0.15 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 28, 2020, 11 a.m. 3.0 ppb (3) 2.0 ppb (2) 3.7 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 28, 2020, 10 a.m. 6.0 ppb (6) 2.0 ppb (2) 6.5 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 19.0 ppb (15) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 28, 2020, 9 a.m. 7.0 ppb (6) 2.0 ppb (2) 7.7 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 17.0 ppb (13) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 28, 2020, 8 a.m. 5.0 ppb (5) 1.0 ppb (1) 6.2 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 23.0 ppb (18) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 28, 2020, 7 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.4 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 26.0 ppb (20) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 28, 2020, 6 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.4 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 27.0
 
June 28, 2020, 5 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.9 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 40.0 ppb (31) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
June 28, 2020, 4 a.m. 13.0 ppb (12) 3.0 ppb (3) 12.3 ppb (11) 10.0 ppb (9) N/A 1.0 ppb (1) 36.0 ppb (28) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
June 28, 2020, 3 a.m. 17.0 ppb (16) 3.0 ppb (3) 20.8 ppb (19) 14.0 ppb (13) N/A 1.0 ppb (1) 35.0 ppb (27) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 27.0
 
June 28, 2020, 2 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.7 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 48.0 ppb (37) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 37.0
 
June 28, 2020, 1 a.m. 4.0 ppb (4) 1.0 ppb (1) 4.9 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 49.0 ppb (38) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 38.0
 
June 28, 2020, midnight 4.0 ppb (4) 1.0 ppb (1) 4.3 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 50.0 ppb (38) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 38.0
 
June 27, 2020, 11 p.m. 5.0 ppb (5) 1.0 ppb (1) 5.2 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 53.0 ppb (41) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 41.0
 
June 27, 2020, 10 p.m. 6.0 ppb (6) 1.0 ppb (1) 6.7 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 50.0 ppb (38) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 38.0
 
June 27, 2020, 9 p.m. 7.0 ppb (6) 2.0 ppb (2) 7.0 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 53.0 ppb (41) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
June 27, 2020, 8 p.m. 12.0 ppb (11) 2.0 ppb (2) 14.3 ppb (13) 10.0 ppb (9) N/A 1.0 ppb (1) 40.0 ppb (31) 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
June 27, 2020, 7 p.m. 8.0 ppb (7) 2.0 ppb (2) 8.1 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 46.0 ppb (35) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
June 27, 2020, 6 p.m. 10.0 ppb (9) 2.0 ppb (2) 10.5 ppb (10) 8.0 ppb (7) N/A 1.0 ppb (1) 46.0 ppb (35) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 35.0
 
June 27, 2020, 5 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.5 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 50.0 ppb (38) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 38.0
 
June 27, 2020, 4 p.m. 5.0 ppb (5) 2.0 ppb (2) 6.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 56.0 ppb (43) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 43.0
 
June 27, 2020, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.5 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 54.0 ppb (42) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 42.0
 
June 27, 2020, 2 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.2 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 50.0 ppb (38) 0.15 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
June 27, 2020, 1 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.7 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 43.0 ppb (33) 0.14 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 27, 2020, noon 6.0 ppb (6) 2.0 ppb (2) 6.4 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 27, 2020, 11 a.m. 9.0 ppb (8) 3.0 ppb (3) 9.7 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 7.0 μg/m3 (29) 29.0
 
June 27, 2020, 10 a.m. 8.0 ppb (7) 2.0 ppb (2) 9.2 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 10.0 μg/m3 (42) 42.0
 
June 27, 2020, 9 a.m. 6.0 ppb (6) 1.0 ppb (1) 7.0 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
June 27, 2020, 8 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.5 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 27, 2020, 7 a.m. N/A N/A 6.4 ppb (6) N/A N/A 1.0 ppb (1) 31.0 ppb (24) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 27, 2020, 6 a.m. N/A N/A 7.9 ppb (7) N/A N/A 1.0 ppb (1) 31.0 ppb (24) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
June 27, 2020, 5 a.m. N/A N/A 9.9 ppb (9) N/A N/A 1.0 ppb (1) 30.0 ppb (23) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 27, 2020, 4 a.m. 9.0 ppb (8) 1.0 ppb (1) 10.5 ppb (10) 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 24.0
 
June 27, 2020, 3 a.m. 11.0 ppb (10) 2.0 ppb (2) 11.4 ppb (11) 9.0 ppb (8) N/A N/A 33.0 ppb (25) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
June 27, 2020, 2 a.m. 11.0 ppb (10) 1.0 ppb (1) 12.1 ppb (11) 9.0 ppb (8) N/A N/A 43.0 ppb (33) 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
June 27, 2020, 1 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 53.0 ppb (41) 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
June 27, 2020, midnight 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 50.0 ppb (38) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 38.0
 
June 26, 2020, 11 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 52.0 ppb (40) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 40.0
 
June 26, 2020, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.1 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 54.0 ppb (42) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 42.0
 
June 26, 2020, 9 p.m. 6.0 ppb (6) 2.0 ppb (2) 7.0 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 55.0 ppb (42) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 42.0
 
June 26, 2020, 8 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.7 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 58.0 ppb (45) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 45.0
 
June 26, 2020, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) 7.1 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (1) 58.0 ppb (45) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 45.0
 
June 26, 2020, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) 8.0 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 58.0 ppb (45) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 45.0
 
June 26, 2020, 5 p.m. 9.0 ppb (8) 2.0 ppb (2) 9.3 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 60.0 ppb (46) 0.2 ppb (2) N/A 8.0 μg/m3 (33) 46.0
 
June 26, 2020, 4 p.m. 10.0 ppb (9) 3.0 ppb (3) 9.6 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 59.0 ppb (45) 0.21 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 26, 2020, 3 p.m. 8.0 ppb (7) 3.0 ppb (3) 9.7 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 57.0 ppb (44) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 44.0
 
June 26, 2020, 2 p.m. 9.0 ppb (8) 2.0 ppb (2) 9.7 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 55.0 ppb (42) 0.16 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 26, 2020, 1 p.m. 12.0 ppb (11) 3.0 ppb (3) 12.8 ppb (12) 9.0 ppb (8) N/A 1.0 ppb (1) 49.0 ppb (38) 0.17 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 26, 2020, noon 16.0 ppb (15) 4.0 ppb (4) 16.5 ppb (15) 12.0 ppb (11) N/A 1.0 ppb (1) 42.0 ppb (32) 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 26, 2020, 11 a.m. 19.0 ppb (18) 5.0 ppb (5) 20.4 ppb (19) 13.0 ppb (12) N/A 1.0 ppb (1) 35.0 ppb (27) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 27.0
 
June 26, 2020, 10 a.m. 15.0 ppb (14) 4.0 ppb (4) 15.8 ppb (15) 11.0 ppb (10) N/A 1.0 ppb (1) 33.0 ppb (25) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 26, 2020, 9 a.m. 8.0 ppb (7) 1.0 ppb (1) 9.3 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 35.0 ppb (27) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 26, 2020, 8 a.m. 9.0 ppb (8) 1.0 ppb (1) 9.7 ppb (9) 8.0 ppb (7) N/A 1.0 ppb (1) 36.0 ppb (28) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
June 26, 2020, 7 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.5 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 41.0 ppb (32) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
June 26, 2020, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 48.0 ppb (37) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 37.0
 
June 26, 2020, 5 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.7 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 50.0 ppb (38) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
June 26, 2020, 4 a.m. 6.0 ppb (6) 1.0 ppb (1) 6.9 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 49.0 ppb (38) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 38.0
 
June 26, 2020, 3 a.m. 6.0 ppb (6) 1.0 ppb (1) 6.8 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 50.0 ppb (38) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 38.0
 
June 26, 2020, 2 a.m. 7.0 ppb (6) 1.0 ppb (1) 7.1 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 48.0 ppb (37) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 37.0
 
June 26, 2020, 1 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.4 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 42.0 ppb (32) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 32.0
 
June 26, 2020, midnight 7.0 ppb (6) 1.0 ppb (1) 7.3 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 46.0 ppb (35) 0.25 ppb (3) N/A -4.0 μg/m3 (0) 35.0
 
June 25, 2020, 11 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.3 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 47.0 ppb (36) 0.17 ppb (2) N/A -3.0 μg/m3 (0) 36.0
 
June 25, 2020, 10 p.m. 5.0 ppb (5) 2.0 ppb (2) 4.9 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 47.0 ppb (36) 0.15 ppb (2) N/A -2.0 μg/m3 (0) 36.0
 
June 25, 2020, 9 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.7 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 35.0
 
June 25, 2020, 8 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.2 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 44.0 ppb (34) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 34.0
 
June 25, 2020, 7 p.m. 7.0 ppb (6) 3.0 ppb (3) 7.1 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (1) 44.0 ppb (34) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 34.0
 
June 25, 2020, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) 7.4 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 47.0 ppb (36) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 36.0
 
June 25, 2020, 5 p.m. 8.0 ppb (7) 3.0 ppb (3) 8.9 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 48.0 ppb (37) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 37.0
 
June 25, 2020, 4 p.m. 9.0 ppb (8) 3.0 ppb (3) 9.6 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 46.0 ppb (35) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 35.0
 
June 25, 2020, 3 p.m. 7.0 ppb (6) 3.0 ppb (3) 7.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 46.0 ppb (35) 0.13 ppb (1) N/A 6.0 μg/m3 (25) 35.0
 
June 25, 2020, 2 p.m. 11.0 ppb (10) 4.0 ppb (4) 12.0 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 39.0 ppb (30) 0.11 ppb (1) N/A 6.0 μg/m3 (25) 30.0
 
June 25, 2020, 1 p.m. 14.0 ppb (13) 5.0 ppb (5) 15.4 ppb (14) 9.0 ppb (8) N/A 1.0 ppb (1) 33.0 ppb (25) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 25, 2020, noon 20.0 ppb (19) 7.0 ppb (6) 20.9 ppb (19) 12.0 ppb (11) N/A 1.0 ppb (1) 27.0 ppb (21) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
June 25, 2020, 11 a.m. 20.0 ppb (19) 8.0 ppb (7) 20.9 ppb (19) 12.0 ppb (11) N/A 1.0 ppb (1) 21.0 ppb (16) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 19.0
 
June 25, 2020, 10 a.m. 23.0 ppb (21) 9.0 ppb (8) 24.3 ppb (23) 14.0 ppb (13) N/A 1.0 ppb (1) 11.0 ppb (8) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
June 25, 2020, 9 a.m. 13.0 ppb (12) 3.0 ppb (3) 14.0 ppb (13) 10.0 ppb (9) N/A 1.0 ppb (1) 13.0 ppb (10) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
June 25, 2020, 8 a.m. 10.0 ppb (9) 1.0 ppb (1) 11.1 ppb (10) 9.0 ppb (8) N/A 1.0 ppb (1) 14.0 ppb (11) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
June 25, 2020, 7 a.m. 8.0 ppb (7) 1.0 ppb (1) 8.9 ppb (8) 7.0 ppb (6) N/A 1.0 ppb (1) 19.0 ppb (15) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 15.0
 
June 25, 2020, 6 a.m. 9.0 ppb (8) 1.0 ppb (1) 9.7 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 20.0 ppb (15) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 15.0
 
June 25, 2020, 5 a.m. 13.0 ppb (12) 2.0 ppb (2) 14.6 ppb (14) 12.0 ppb (11) N/A 1.0 ppb (1) 15.0 ppb (12) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 25, 2020, 4 a.m. 19.0 ppb (18) 2.0 ppb (2) 20.5 ppb (19) 17.0 ppb (16) N/A 1.0 ppb (1) 11.0 ppb (8) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
June 25, 2020, 3 a.m. 41.0 ppb (38) 15.0 ppb (14) 40.5 ppb (38) 26.0 ppb (24) N/A 1.0 ppb (1) 12.0 ppb (9) 0.21 ppb (2) N/A -1.0 μg/m3 (0) 38.0
 
June 25, 2020, 2 a.m. 58.0 ppb (54) 26.0 ppb (24) 59.0 ppb (55) 33.0 ppb (31) N/A 1.0 ppb (1) 8.0 ppb (6) 0.16 ppb (2) N/A N/A 55.0
 
June 25, 2020, 1 a.m. 20.0 ppb (19) 5.0 ppb (5) 22.6 ppb (21) 15.0 ppb (14) N/A 1.0 ppb (1) 23.0 ppb (18) 0.16 ppb (2) N/A N/A 21.0
 
June 25, 2020, midnight 14.0 ppb (13) 3.0 ppb (3) 14.8 ppb (14) 11.0 ppb (10) N/A 1.0 ppb (1) 25.0 ppb (19) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 19.0
 
June 24, 2020, 11 p.m. 6.0 ppb (6) 1.0 ppb (1) 7.3 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (1) 44.0 ppb (34) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 24, 2020, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) 7.2 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (1) 48.0 ppb (37) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
June 24, 2020, 9 p.m. 5.0 ppb (5) 2.0 ppb (2) 5.9 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 49.0 ppb (38) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
June 24, 2020, 8 p.m. 5.0 ppb (5) 2.0 ppb (2) 6.0 ppb (6) 3.0 ppb (3) N/A 1.0 ppb (1) 45.0 ppb (35) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
June 24, 2020, 7 p.m. 5.0 ppb (5) 2.0 ppb (2) 6.4 ppb (6) 3.0 ppb (3) N/A 1.0 ppb (1) 41.0 ppb (32) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 24, 2020, 6 p.m. 9.0 ppb (8) 2.0 ppb (2) 12.3 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 39.0 ppb (30) 0.23 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
June 24, 2020, 5 p.m. 9.0 ppb (8) 3.0 ppb (3) 11.0 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 44.0 ppb (34) 0.22 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
June 24, 2020, 4 p.m. 7.0 ppb (6) 2.0 ppb (2) 9.5 ppb (9) 5.0 ppb (5) N/A 1.0 ppb (1) 44.0 ppb (34) 0.24 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
June 24, 2020, 3 p.m. 11.0 ppb (10) 4.0 ppb (4) 12.0 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.19 ppb (2) N/A 20.0 μg/m3 (67) 67.0
 
June 24, 2020, 2 p.m. 11.0 ppb (10) 4.0 ppb (4) 12.2 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.18 ppb (2) N/A N/A 23.0
 
June 24, 2020, 1 p.m. 10.0 ppb (9) 4.0 ppb (4) 11.2 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 29.0 ppb (22) 0.15 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
June 24, 2020, noon 14.0 ppb (13) 6.0 ppb (6) 16.0 ppb (15) 9.0 ppb (8) N/A 1.0 ppb (1) 26.0 ppb (20) 0.17 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 24, 2020, 11 a.m. 16.0 ppb (15) 6.0 ppb (6) 15.8 ppb (15) 10.0 ppb (9) N/A 1.0 ppb (1) 26.0 ppb (20) N/A N/A 10.0 μg/m3 (42) 42.0
 
June 24, 2020, 10 a.m. 7.0 ppb (6) 3.0 ppb (3) 7.2 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 8.0 μg/m3 (33) 33.0
 
June 24, 2020, 9 a.m. 2.0 ppb (2) 1.0 ppb (1) 2.7 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
June 24, 2020, 8 a.m. 2.0 ppb (2) 1.0 ppb (1) 2.6 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
June 24, 2020, 7 a.m. N/A N/A 2.0 ppb (2) N/A N/A 1.0 ppb (1) 38.0 ppb (29) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 29.0
 
June 24, 2020, 6 a.m. N/A N/A 2.1 ppb (2) N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 31.0
 
June 24, 2020, 5 a.m. N/A N/A 2.3 ppb (2) N/A N/A 1.0 ppb (1) 38.0 ppb (29) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 29.0
 
June 24, 2020, 4 a.m. 3.0 ppb (3) 1.0 ppb (1) 3.2 ppb (3) 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.15 ppb (2) N/A -2.0 μg/m3 (0) 28.0
 
June 24, 2020, 3 a.m. 4.0 ppb (4) 2.0 ppb (2) 4.1 ppb (4) 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 28.0
 
June 24, 2020, 2 a.m. 4.0 ppb (4) 2.0 ppb (2) 4.2 ppb (4) 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
June 24, 2020, 1 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
June 24, 2020, midnight 4.0 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 40.0 ppb (31) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 31.0
 
June 23, 2020, 11 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) 0.22 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
June 23, 2020, 10 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.7 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 48.0 ppb (37) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 37.0
 
June 23, 2020, 9 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.9 ppb (5) 2.0 ppb (2) N/A 1.0 ppb (1) 49.0 ppb (38) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 38.0
 
June 23, 2020, 8 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.9 ppb (5) 2.0 ppb (2) N/A 1.0 ppb (1) 48.0 ppb (37) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 37.0
 
June 23, 2020, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) 6.3 ppb (6) 3.0 ppb (3) N/A 1.0 ppb (1) 47.0 ppb (36) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 23, 2020, 6 p.m. 8.0 ppb (7) 3.0 ppb (3) 7.8 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 49.0 ppb (38) 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 23, 2020, 5 p.m. 8.0 ppb (7) 3.0 ppb (3) 9.5 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 51.0 ppb (39) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
June 23, 2020, 4 p.m. 9.0 ppb (8) 3.0 ppb (3) 10.9 ppb (10) 7.0 ppb (6) N/A 1.0 ppb (1) 50.0 ppb (38) 0.22 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
June 23, 2020, 3 p.m. 9.0 ppb (8) 3.0 ppb (3) 11.0 ppb (10) 7.0 ppb (6) N/A 1.0 ppb (1) 51.0 ppb (39) 0.19 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 23, 2020, 2 p.m. 10.0 ppb (9) 3.0 ppb (3) 12.4 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 43.0 ppb (33) 0.17 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 23, 2020, 1 p.m. 11.0 ppb (10) 4.0 ppb (4) 12.2 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 31.0 ppb (24) 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 23, 2020, noon 12.0 ppb (11) 5.0 ppb (5) 15.6 ppb (14) 8.0 ppb (7) N/A 1.0 ppb (1) 24.0 ppb (18) 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 23, 2020, 11 a.m. 11.0 ppb (10) 4.0 ppb (4) 12.3 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 21.0 ppb (16) 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 23, 2020, 10 a.m. 8.0 ppb (7) 3.0 ppb (3) 8.6 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 22.0 ppb (17) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 17.0
 
June 23, 2020, 9 a.m. 5.0 ppb (5) 1.0 ppb (1) 6.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 21.0 ppb (16) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 16.0
 
June 23, 2020, 8 a.m. 4.0 ppb (4) 1.0 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 20.0 ppb (15) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
June 23, 2020, 7 a.m. 3.0 ppb (3) 1.0 ppb (1) 3.7 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 21.0 ppb (16) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
June 23, 2020, 6 a.m. 7.0 ppb (6) 1.0 ppb (1) 7.2 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 12.0 ppb (9) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 9.0
 
June 23, 2020, 5 a.m. 10.0 ppb (9) 3.0 ppb (3) 11.4 ppb (11) 8.0 ppb (7) N/A 1.0 ppb (1) 4.0 ppb (3) 0.18 ppb (2) N/A -3.0 μg/m3 (0) 11.0
 
June 23, 2020, 4 a.m. 10.0 ppb (9) 3.0 ppb (3) 11.5 ppb (11) 7.0 ppb (6) N/A 1.0 ppb (1) 5.0 ppb (4) 0.18 ppb (2) N/A -3.0 μg/m3 (0) 11.0
 
June 23, 2020, 3 a.m. 8.0 ppb (7) 2.0 ppb (2) 8.2 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 8.0 ppb (6) 0.17 ppb (2) N/A -2.0 μg/m3 (0) 8.0
 
June 23, 2020, 2 a.m. 7.0 ppb (6) 2.0 ppb (2) 7.9 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 9.0 ppb (7) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 7.0
 
June 23, 2020, 1 a.m. 13.0 ppb (12) 3.0 ppb (3) 13.6 ppb (13) 10.0 ppb (9) N/A 1.0 ppb (1) 7.0 ppb (5) 0.15 ppb (2) N/A -3.0 μg/m3 (0) 13.0
 
June 23, 2020, midnight 11.0 ppb (10) 3.0 ppb (3) 11.9 ppb (11) 8.0 ppb (7) N/A 1.0 ppb (1) 8.0 ppb (6) 0.15 ppb (2) N/A N/A 11.0
 
June 22, 2020, 11 p.m. 7.0 ppb (6) 3.0 ppb (3) 7.9 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 13.0 ppb (10) 0.1 ppb (1) N/A N/A 10.0
 
June 22, 2020, 10 p.m. 8.0 ppb (7) 3.0 ppb (3) 8.4 ppb (8) 4.0 ppb (4) N/A 1.0 ppb (1) 15.0 ppb (12) 0.12 ppb (1) N/A -4.0 μg/m3 (0) 12.0
 
June 22, 2020, 9 p.m. 4.0 ppb (4) 3.0 ppb (3) 4.8 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 22.0 ppb (17) 0.13 ppb (1) N/A -3.0 μg/m3 (0) 17.0
 
June 22, 2020, 8 p.m. 5.0 ppb (5) 3.0 ppb (3) 5.5 ppb (5) 2.0 ppb (2) N/A 1.0 ppb (1) 23.0 ppb (18) 0.14 ppb (2) N/A -2.0 μg/m3 (0) 18.0
 
June 22, 2020, 7 p.m. 5.0 ppb (5) 3.0 ppb (3) 4.8 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) 0.14 ppb (2) N/A -2.0 μg/m3 (0) 19.0
 
June 22, 2020, 6 p.m. 8.0 ppb (7) 4.0 ppb (4) 7.2 ppb (7) 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.16 ppb (2) N/A -2.0 μg/m3 (0) 20.0
 
June 22, 2020, 5 p.m. 4.0 ppb (4) 3.0 ppb (3) 4.4 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) 0.12 ppb (1) N/A 2.0 μg/m3 (8) 22.0
 
June 22, 2020, 4 p.m. 5.0 ppb (5) 3.0 ppb (3) 5.3 ppb (5) 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 22.0
 
June 22, 2020, 3 p.m. 4.0 ppb (4) 2.0 ppb (2) 4.5 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) 0.11 ppb (1) N/A 2.0 μg/m3 (8) 21.0
 
June 22, 2020, 2 p.m. 10.0 ppb (9) 5.0 ppb (5) 11.1 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 23.0 ppb (18) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 18.0
 
June 22, 2020, 1 p.m. 14.0 ppb (13) 6.0 ppb (6) 15.4 ppb (14) 9.0 ppb (8) N/A 1.0 ppb (1) 18.0 ppb (14) 0.19 ppb (2) N/A 0.0 μg/m3 (0) 14.0
 
June 22, 2020, noon 12.0 ppb (11) 4.0 ppb (4) 12.6 ppb (12) 8.0 ppb (7) N/A 1.0 ppb (1) 17.0 ppb (13) 0.18 ppb (2) N/A 0.0 μg/m3 (0) 13.0
 
June 22, 2020, 11 a.m. 9.0 ppb (8) 3.0 ppb (3) 9.8 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 17.0 ppb (13) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
June 22, 2020, 10 a.m. 13.0 ppb (12) 3.0 ppb (3) 13.5 ppb (12) 9.0 ppb (8) N/A 1.0 ppb (1) 13.0 ppb (10) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 12.0
 
June 22, 2020, 9 a.m. 12.0 ppb (11) 2.0 ppb (2) 13.0 ppb (12) 10.0 ppb (9) N/A 1.0 ppb (1) 11.0 ppb (8) 0.13 ppb (1) N/A -2.0 μg/m3 (0) 12.0
 
June 22, 2020, 8 a.m. 11.0 ppb (10) 2.0 ppb (2) 11.1 ppb (10) 9.0 ppb (8) N/A 1.0 ppb (1) 11.0 ppb (8) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 10.0
 
June 22, 2020, 7 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 18.0 ppb (14) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 14.0
 
June 22, 2020, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) 4.9 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 19.0 ppb (15) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
June 22, 2020, 5 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.7 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 21.0 ppb (16) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 22, 2020, 4 a.m. 5.0 ppb (5) 1.0 ppb (1) 5.9 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 24.0 ppb (18) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 22, 2020, 3 a.m. 6.0 ppb (6) 2.0 ppb (2) 6.6 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 28.0 ppb (22) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 22, 2020, 2 a.m. 8.0 ppb (7) 1.0 ppb (1) 9.3 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 28.0 ppb (22) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
June 22, 2020, 1 a.m. 13.0 ppb (12) 1.0 ppb (1) 14.6 ppb (14) 12.0 ppb (11) N/A 1.0 ppb (1) 26.0 ppb (20) 0.39 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
June 22, 2020, midnight 9.0 ppb (8) 1.0 ppb (1) 9.6 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 37.0 ppb (28) 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
June 21, 2020, 11 p.m. 8.0 ppb (7) 1.0 ppb (1) 9.5 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 41.0 ppb (32) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
June 21, 2020, 10 p.m. 4.0 ppb (4) 1.0 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 48.0 ppb (37) 0.21 ppb (2) N/A N/A 37.0
 
June 21, 2020, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.3 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 50.0 ppb (38) 0.17 ppb (2) N/A N/A 38.0
 
June 21, 2020, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.2 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 54.0 ppb (42) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 42.0
 
June 21, 2020, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) 7.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 58.0 ppb (45) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 45.0
 
June 21, 2020, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) 8.8 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 57.0 ppb (44) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 44.0
 
June 21, 2020, 5 p.m. 7.0 ppb (6) 2.0 ppb (2) 8.3 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 54.0 ppb (42) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 42.0
 
June 21, 2020, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) 3.1 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) 50.0 ppb (38) 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 21, 2020, 3 p.m. 3.0 ppb (3) 1.0 ppb (1) 3.6 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) 50.0 ppb (38) 0.15 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 21, 2020, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.2 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 45.0 ppb (35) 0.17 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 21, 2020, 1 p.m. 3.0 ppb (3) 1.0 ppb (1) 4.1 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.15 ppb (2) N/A 14.0 μg/m3 (54) 54.0