AQSQID: 250250042

Site Name: Boston - Roxbury

Location: Roxbury (Roxbury), MA

Reporting: True, Located: True

Current AQI: 67.0

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
Jan. 22, 2020, 3 p.m. 37.0 ppb (34) 16.0 ppb (15) 39.2 ppb (36) 21.0 ppb (19) N/A 1.0 ppb (1) 22.0 ppb (17) 0.33 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 22, 2020, 2 p.m. 60.0 ppb (56) 29.0 ppb (27) 63.3 ppb (60) 30.0 ppb (28) N/A 1.0 ppb (1) 12.0 ppb (9) 0.45 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 22, 2020, 1 p.m. 74.0 ppb (71) 38.0 ppb (35) 77.5 ppb (75) 36.0 ppb (33) N/A 1.0 ppb (1) 7.0 ppb (5) 0.52 ppb (6) N/A 10.0 μg/m3 (42) 75.0
 
Jan. 22, 2020, noon 112.0 ppb (102) 68.0 ppb (65) 117.1 ppb (103) 44.0 ppb (41) N/A 1.0 ppb (1) 1.0 ppb (1) 0.72 ppb (8) N/A 10.0 μg/m3 (42) 103.0
 
Jan. 22, 2020, 11 a.m. 98.0 ppb (97) 54.0 ppb (50) 102.8 ppb (100) 43.0 ppb (40) N/A 1.0 ppb (1) 0.0 ppb (0) 0.69 ppb (8) N/A 10.0 μg/m3 (42) 100.0
 
Jan. 22, 2020, 10 a.m. 82.0 ppb (80) 40.0 ppb (37) 94.4 ppb (93) 42.0 ppb (39) N/A 1.0 ppb (1) 0.0 ppb (0) 0.64 ppb (7) N/A 12.0 μg/m3 (50) 93.0
 
Jan. 22, 2020, 9 a.m. 65.0 ppb (62) 24.0 ppb (22) 70.9 ppb (68) 41.0 ppb (38) N/A 1.0 ppb (1) 0.0 ppb (0) 0.45 ppb (5) N/A 10.0 μg/m3 (42) 68.0
 
Jan. 22, 2020, 8 a.m. 49.0 ppb (45) 10.0 ppb (9) 53.0 ppb (49) 38.0 ppb (35) N/A 1.0 ppb (1) 2.0 ppb (2) 0.39 ppb (4) N/A 9.0 μg/m3 (38) 49.0
 
Jan. 22, 2020, 7 a.m. 41.0 ppb (38) 8.0 ppb (7) 44.1 ppb (41) 32.0 ppb (30) N/A 1.0 ppb (1) 7.0 ppb (5) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 41.0
 
Jan. 22, 2020, 6 a.m. 65.0 ppb (62) 23.0 ppb (21) 68.2 ppb (65) 42.0 ppb (39) N/A 1.0 ppb (1) 1.0 ppb (1) 0.46 ppb (5) N/A 6.0 μg/m3 (25) 65.0
 
Jan. 22, 2020, 5 a.m. 84.0 ppb (82) 40.0 ppb (37) 81.9 ppb (80) 44.0 ppb (41) N/A 1.0 ppb (1) 1.0 ppb (1) 0.68 ppb (8) N/A 17.0 μg/m3 (61) 82.0
 
Jan. 22, 2020, 4 a.m. 67.0 ppb (64) 25.0 ppb (23) 69.3 ppb (66) 42.0 ppb (39) N/A 1.0 ppb (1) 2.0 ppb (2) 0.57 ppb (6) N/A 11.0 μg/m3 (46) 66.0
 
Jan. 22, 2020, 3 a.m. 73.0 ppb (70) 29.0 ppb (27) 76.3 ppb (74) 44.0 ppb (41) N/A 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (7) N/A 15.0 μg/m3 (56) 74.0
 
Jan. 22, 2020, 2 a.m. 87.0 ppb (85) 41.0 ppb (38) 93.2 ppb (92) 46.0 ppb (43) N/A 1.0 ppb (1) 1.0 ppb (1) 0.7 ppb (8) N/A 11.0 μg/m3 (46) 92.0
 
Jan. 22, 2020, 1 a.m. 79.0 ppb (77) 33.0 ppb (31) 84.8 ppb (83) 46.0 ppb (43) N/A 1.0 ppb (1) 1.0 ppb (1) 0.69 ppb (8) N/A 16.0 μg/m3 (59) 83.0
 
Jan. 22, 2020, midnight 95.0 ppb (94) 46.0 ppb (43) 98.9 ppb (98) 48.0 ppb (44) N/A 1.0 ppb (1) 1.0 ppb (1) 0.82 ppb (9) N/A 13.0 μg/m3 (52) 98.0
 
Jan. 21, 2020, 11 p.m. 63.0 ppb (60) 19.0 ppb (18) 68.5 ppb (65) 44.0 ppb (41) N/A 1.0 ppb (1) 2.0 ppb (2) 0.6 ppb (7) N/A 11.0 μg/m3 (46) 65.0
 
Jan. 21, 2020, 10 p.m. 27.0 ppb (25) 4.0 ppb (4) 31.8 ppb (29) 23.0 ppb (21) N/A 0.0 ppb (0) 20.0 ppb (15) 0.4 ppb (4) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 21, 2020, 9 p.m. 18.0 ppb (17) 3.0 ppb (3) 20.8 ppb (19) 15.0 ppb (14) N/A 0.0 ppb (0) 28.0 ppb (22) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2020, 8 p.m. 20.0 ppb (19) 5.0 ppb (5) 22.6 ppb (21) 15.0 ppb (14) N/A 1.0 ppb (1) 29.0 ppb (22) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2020, 7 p.m. 17.0 ppb (16) 5.0 ppb (5) 19.4 ppb (18) 12.0 ppb (11) N/A 1.0 ppb (1) 31.0 ppb (24) 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2020, 6 p.m. 20.0 ppb (19) 8.0 ppb (7) 21.4 ppb (20) 12.0 ppb (11) N/A 0.0 ppb (0) 31.0 ppb (24) 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2020, 5 p.m. 18.0 ppb (17) 7.0 ppb (6) 20.2 ppb (19) 11.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) N/A N/A 25.0
 
Jan. 21, 2020, 4 p.m. 17.0 ppb (16) 7.0 ppb (6) 18.8 ppb (17) 10.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2020, 3 p.m. 14.0 ppb (13) 6.0 ppb (6) 15.0 ppb (14) 8.0 ppb (7) N/A 1.0 ppb (1) 34.0 ppb (26) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 21, 2020, 2 p.m. 19.0 ppb (18) 7.0 ppb (6) 20.3 ppb (19) 12.0 ppb (11) N/A 0.0 ppb (0) 30.0 ppb (23) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 23.0
 
Jan. 21, 2020, 1 p.m. 21.0 ppb (19) 6.0 ppb (6) 23.6 ppb (22) 15.0 ppb (14) N/A 1.0 ppb (1) 27.0 ppb (21) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 21, 2020, noon 22.0 ppb (20) 4.0 ppb (4) 24.3 ppb (23) 18.0 ppb (17) N/A 0.0 ppb (0) 24.0 ppb (18) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 23.0
 
Jan. 21, 2020, 11 a.m. 20.0 ppb (19) 3.0 ppb (3) 23.1 ppb (21) 18.0 ppb (17) N/A 0.0 ppb (0) 24.0 ppb (18) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
Jan. 21, 2020, 10 a.m. 16.0 ppb (15) 2.0 ppb (2) 17.3 ppb (16) 14.0 ppb (13) N/A 0.0 ppb (0) 28.0 ppb (22) 0.19 ppb (2) N/A 0.0 μg/m3 (0) 22.0
 
Jan. 21, 2020, 9 a.m. 14.0 ppb (13) 2.0 ppb (2) 15.2 ppb (14) 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.18 ppb (2) N/A -1.0 μg/m3 (0) 22.0
 
Jan. 21, 2020, 8 a.m. 14.0 ppb (13) 3.0 ppb (3) 16.0 ppb (15) 12.0 ppb (11) N/A 0.0 ppb (0) 30.0 ppb (23) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 23.0
 
Jan. 21, 2020, 7 a.m. 20.0 ppb (19) 4.0 ppb (4) 21.6 ppb (20) 15.0 ppb (14) N/A 0.0 ppb (0) 26.0 ppb (20) 0.18 ppb (2) N/A 0.0 μg/m3 (0) 20.0
 
Jan. 21, 2020, 6 a.m. 15.0 ppb (14) 3.0 ppb (3) 17.1 ppb (16) 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 22.0
 
Jan. 21, 2020, 5 a.m. 18.0 ppb (17) 4.0 ppb (4) 21.4 ppb (20) 14.0 ppb (13) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 21.0
 
Jan. 21, 2020, 4 a.m. 25.0 ppb (23) 5.0 ppb (5) 27.5 ppb (25) 20.0 ppb (19) N/A 0.0 ppb (0) 22.0 ppb (17) 0.23 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 21, 2020, 3 a.m. 19.0 ppb (18) 3.0 ppb (3) 21.3 ppb (20) 16.0 ppb (15) N/A 0.0 ppb (0) 24.0 ppb (18) 0.24 ppb (3) N/A 0.0 μg/m3 (0) 20.0
 
Jan. 21, 2020, 2 a.m. 20.0 ppb (19) 3.0 ppb (3) 22.1 ppb (20) 17.0 ppb (16) N/A 0.0 ppb (0) 25.0 ppb (19) 0.24 ppb (3) N/A 0.0 μg/m3 (0) 20.0
 
Jan. 21, 2020, 1 a.m. 26.0 ppb (24) 5.0 ppb (5) 28.7 ppb (27) 21.0 ppb (19) N/A 1.0 ppb (1) 22.0 ppb (17) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 27.0
 
Jan. 21, 2020, midnight 31.0 ppb (29) 8.0 ppb (7) 33.4 ppb (31) 23.0 ppb (21) N/A 1.0 ppb (1) 19.0 ppb (15) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 31.0
 
Jan. 20, 2020, 11 p.m. 22.0 ppb (20) 4.0 ppb (4) 24.8 ppb (23) 18.0 ppb (17) N/A 1.0 ppb (1) 24.0 ppb (18) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
Jan. 20, 2020, 10 p.m. 19.0 ppb (18) 4.0 ppb (4) 21.5 ppb (20) 16.0 ppb (15) N/A 1.0 ppb (1) 26.0 ppb (20) 0.24 ppb (3) N/A 0.0 μg/m3 (0) 20.0
 
Jan. 20, 2020, 9 p.m. 13.0 ppb (12) 3.0 ppb (3) 14.0 ppb (13) 10.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 20, 2020, 8 p.m. 9.0 ppb (8) 3.0 ppb (3) 10.6 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.18 ppb (2) N/A 0.0 μg/m3 (0) 28.0
 
Jan. 20, 2020, 7 p.m. 10.0 ppb (9) 4.0 ppb (4) 10.6 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 20, 2020, 6 p.m. 11.0 ppb (10) 5.0 ppb (5) 11.5 ppb (11) 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 20, 2020, 5 p.m. 14.0 ppb (13) 6.0 ppb (6) 14.7 ppb (14) 7.0 ppb (6) N/A 1.0 ppb (1) 35.0 ppb (27) 0.18 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2020, 4 p.m. 15.0 ppb (14) 7.0 ppb (6) 15.5 ppb (14) 8.0 ppb (7) N/A 1.0 ppb (1) 33.0 ppb (25) 0.17 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2020, 3 p.m. 17.0 ppb (16) 7.0 ppb (6) 18.8 ppb (17) 9.0 ppb (8) N/A 1.0 ppb (1) 31.0 ppb (24) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2020, 2 p.m. 15.0 ppb (14) 6.0 ppb (6) 17.0 ppb (16) 9.0 ppb (8) N/A 1.0 ppb (1) 29.0 ppb (22) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2020, 1 p.m. 16.0 ppb (15) 6.0 ppb (6) 19.1 ppb (18) 11.0 ppb (10) N/A 1.0 ppb (1) 27.0 ppb (21) 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2020, noon 18.0 ppb (17) 5.0 ppb (5) 20.5 ppb (19) 13.0 ppb (12) N/A 1.0 ppb (1) 24.0 ppb (18) 0.34 ppb (4) N/A 2.0 μg/m3 (8) 19.0
 
Jan. 20, 2020, 11 a.m. 12.0 ppb (11) 3.0 ppb (3) 13.9 ppb (13) 10.0 ppb (9) N/A 1.0 ppb (1) 27.0 ppb (21) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
Jan. 20, 2020, 10 a.m. 10.0 ppb (9) 2.0 ppb (2) 11.3 ppb (10) 8.0 ppb (7) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2020, 9 a.m. 8.0 ppb (7) 2.0 ppb (2) 9.0 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 29.0 ppb (22) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 20, 2020, 8 a.m. 7.0 ppb (6) 2.0 ppb (2) 7.5 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2020, 7 a.m. N/A N/A 11.2 ppb (10) N/A N/A 1.0 ppb (1) 30.0 ppb (23) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 23.0
 
Jan. 20, 2020, 6 a.m. N/A N/A 8.6 ppb (8) N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 25.0
 
Jan. 20, 2020, 5 a.m. N/A N/A 9.2 ppb (9) N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 20, 2020, 4 a.m. 8.0 ppb (7) 2.0 ppb (2) 8.6 ppb (8) 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 24.0
 
Jan. 20, 2020, 3 a.m. 7.0 ppb (6) 2.0 ppb (2) 8.1 ppb (8) 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 20, 2020, 2 a.m. 11.0 ppb (10) 3.0 ppb (3) 12.0 ppb (11) 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 20.0
 
Jan. 20, 2020, 1 a.m. 9.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 29.0 ppb (22) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 20, 2020, midnight 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 27.0 ppb (21) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2020, 11 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 27.0 ppb (21) 0.19 ppb (2) N/A -1.0 μg/m3 (0) 21.0
 
Jan. 19, 2020, 10 p.m. 11.0 ppb (10) 3.0 ppb (3) 11.9 ppb (11) 8.0 ppb (7) N/A 1.0 ppb (1) 25.0 ppb (19) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 19.0
 
Jan. 19, 2020, 9 p.m. 12.0 ppb (11) 4.0 ppb (4) 12.8 ppb (12) 8.0 ppb (7) N/A 1.0 ppb (1) 22.0 ppb (17) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 17.0
 
Jan. 19, 2020, 8 p.m. 13.0 ppb (12) 5.0 ppb (5) 14.2 ppb (13) 8.0 ppb (7) N/A 1.0 ppb (1) 21.0 ppb (16) 0.22 ppb (2) N/A 3.0 μg/m3 (12) 16.0
 
Jan. 19, 2020, 7 p.m. 14.0 ppb (13) 6.0 ppb (6) 15.6 ppb (14) 8.0 ppb (7) N/A 1.0 ppb (1) 21.0 ppb (16) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 16.0
 
Jan. 19, 2020, 6 p.m. 18.0 ppb (17) 9.0 ppb (8) 21.5 ppb (20) 10.0 ppb (9) N/A 1.0 ppb (1) 20.0 ppb (15) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 20.0
 
Jan. 19, 2020, 5 p.m. 9.0 ppb (8) 5.0 ppb (5) 9.6 ppb (9) 4.0 ppb (4) N/A 1.0 ppb (1) 24.0 ppb (18) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2020, 4 p.m. 12.0 ppb (11) 6.0 ppb (6) 13.0 ppb (12) 6.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2020, 3 p.m. 21.0 ppb (19) 10.0 ppb (9) 22.4 ppb (21) 10.0 ppb (9) N/A 1.0 ppb (1) 18.0 ppb (14) 0.33 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 19, 2020, 2 p.m. 34.0 ppb (31) 17.0 ppb (16) 37.8 ppb (35) 17.0 ppb (16) N/A 1.0 ppb (1) 13.0 ppb (10) 0.45 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 19, 2020, 1 p.m. 52.0 ppb (48) 26.0 ppb (24) 56.3 ppb (52) 26.0 ppb (24) N/A 1.0 ppb (1) 6.0 ppb (5) 0.57 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 19, 2020, noon 44.0 ppb (41) 17.0 ppb (16) 51.0 ppb (47) 27.0 ppb (25) N/A 1.0 ppb (1) 2.0 ppb (2) 0.45 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 19, 2020, 11 a.m. 43.0 ppb (40) 13.0 ppb (12) 48.0 ppb (44) 30.0 ppb (28) N/A 1.0 ppb (1) 0.0 ppb (0) 0.42 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 19, 2020, 10 a.m. 43.0 ppb (40) 14.0 ppb (13) 49.0 ppb (45) 29.0 ppb (27) N/A 1.0 ppb (1) 1.0 ppb (1) 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2020, 9 a.m. 42.0 ppb (39) 13.0 ppb (12) 47.4 ppb (44) 29.0 ppb (27) N/A 1.0 ppb (1) 1.0 ppb (1) 0.4 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2020, 8 a.m. 49.0 ppb (45) 16.0 ppb (15) 54.0 ppb (50) 33.0 ppb (31) N/A 1.0 ppb (1) 0.0 ppb (0) 0.43 ppb (5) N/A 8.0 μg/m3 (33) 50.0
 
Jan. 19, 2020, 7 a.m. 50.0 ppb (46) 16.0 ppb (15) 55.4 ppb (51) 34.0 ppb (31) N/A 1.0 ppb (1) 0.0 ppb (0) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 51.0
 
Jan. 19, 2020, 6 a.m. 68.0 ppb (65) 28.0 ppb (26) 74.5 ppb (72) 40.0 ppb (37) N/A 1.0 ppb (1) 0.0 ppb (0) 0.54 ppb (6) N/A 11.0 μg/m3 (46) 72.0
 
Jan. 19, 2020, 5 a.m. 80.0 ppb (78) 38.0 ppb (35) 87.2 ppb (85) 42.0 ppb (39) N/A 1.0 ppb (1) 0.0 ppb (0) 0.61 ppb (7) N/A 10.0 μg/m3 (42) 85.0
 
Jan. 19, 2020, 4 a.m. 51.0 ppb (47) 13.0 ppb (12) 56.6 ppb (53) 38.0 ppb (35) N/A 1.0 ppb (1) 1.0 ppb (1) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 53.0
 
Jan. 19, 2020, 3 a.m. 39.0 ppb (36) 6.0 ppb (6) 43.6 ppb (40) 33.0 ppb (31) N/A 1.0 ppb (1) 6.0 ppb (5) 0.43 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2020, 2 a.m. 28.0 ppb (26) 4.0 ppb (4) 32.0 ppb (30) 23.0 ppb (21) N/A 1.0 ppb (1) 15.0 ppb (12) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Jan. 19, 2020, 1 a.m. 22.0 ppb (20) 4.0 ppb (4) 24.9 ppb (23) 18.0 ppb (17) N/A 0.0 ppb (0) 19.0 ppb (15) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2020, midnight 21.0 ppb (19) 4.0 ppb (4) 24.0 ppb (22) 17.0 ppb (16) N/A 0.0 ppb (0) 20.0 ppb (15) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2020, 11 p.m. 20.0 ppb (19) 4.0 ppb (4) 22.4 ppb (21) 16.0 ppb (15) N/A 0.0 ppb (0) 22.0 ppb (17) 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2020, 10 p.m. 20.0 ppb (19) 5.0 ppb (5) 23.7 ppb (22) 16.0 ppb (15) N/A 0.0 ppb (0) 23.0 ppb (18) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2020, 9 p.m. 18.0 ppb (17) 3.0 ppb (3) 20.5 ppb (19) 15.0 ppb (14) N/A 0.0 ppb (0) 24.0 ppb (18) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2020, 8 p.m. 17.0 ppb (16) 4.0 ppb (4) 19.9 ppb (18) 13.0 ppb (12) N/A 1.0 ppb (1) 25.0 ppb (19) 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 7 p.m. 20.0 ppb (19) 5.0 ppb (5) 21.9 ppb (20) 15.0 ppb (14) N/A 1.0 ppb (1) 25.0 ppb (19) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2020, 6 p.m. 23.0 ppb (21) 6.0 ppb (6) 25.6 ppb (24) 16.0 ppb (15) N/A 1.0 ppb (1) 23.0 ppb (18) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
Jan. 18, 2020, 5 p.m. 22.0 ppb (20) 6.0 ppb (6) 24.9 ppb (23) 16.0 ppb (15) N/A 1.0 ppb (1) 24.0 ppb (18) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 18, 2020, 4 p.m. 25.0 ppb (23) 7.0 ppb (6) 28.6 ppb (26) 18.0 ppb (17) N/A 1.0 ppb (1) 22.0 ppb (17) 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2020, 3 p.m. 20.0 ppb (19) 6.0 ppb (6) 22.8 ppb (21) 14.0 ppb (13) N/A 1.0 ppb (1) 26.0 ppb (20) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2020, 2 p.m. 14.0 ppb (13) 4.0 ppb (4) 15.1 ppb (14) 10.0 ppb (9) N/A 1.0 ppb (1) 30.0 ppb (23) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2020, 1 p.m. 16.0 ppb (15) 5.0 ppb (5) 18.1 ppb (17) 12.0 ppb (11) N/A 1.0 ppb (1) 28.0 ppb (22) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 18, 2020, noon 16.0 ppb (15) 4.0 ppb (4) 17.7 ppb (16) 12.0 ppb (11) N/A 1.0 ppb (1) 27.0 ppb (21) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2020, 11 a.m. 16.0 ppb (15) 4.0 ppb (4) 18.1 ppb (17) 12.0 ppb (11) N/A 1.0 ppb (1) 28.0 ppb (22) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 18, 2020, 10 a.m. 19.0 ppb (18) 4.0 ppb (4) 21.8 ppb (20) 15.0 ppb (14) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 20.0
 
Jan. 18, 2020, 9 a.m. 22.0 ppb (20) 6.0 ppb (6) 24.7 ppb (23) 17.0 ppb (16) N/A 1.0 ppb (1) 23.0 ppb (18) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 18, 2020, 8 a.m. 17.0 ppb (16) 5.0 ppb (5) 19.8 ppb (18) 12.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (22) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 18, 2020, 7 a.m. 11.0 ppb (10) 3.0 ppb (3) 12.9 ppb (12) 9.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (24) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 24.0
 
Jan. 18, 2020, 6 a.m. 8.0 ppb (7) 2.0 ppb (2) 8.6 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 27.0
 
Jan. 18, 2020, 5 a.m. 12.0 ppb (11) 3.0 ppb (3) 13.3 ppb (12) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 18, 2020, 4 a.m. 12.0 ppb (11) 3.0 ppb (3) 12.8 ppb (12) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 25.0
 
Jan. 18, 2020, 3 a.m. 15.0 ppb (14) 4.0 ppb (4) 16.3 ppb (15) 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 23.0
 
Jan. 18, 2020, 2 a.m. 11.0 ppb (10) 3.0 ppb (3) 12.3 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 33.0 ppb (25) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 18, 2020, 1 a.m. 10.0 ppb (9) 2.0 ppb (2) 11.0 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (26) 0.18 ppb (2) N/A 0.0 μg/m3 (0) 26.0
 
Jan. 18, 2020, midnight 12.0 ppb (11) 3.0 ppb (3) 12.9 ppb (12) 9.0 ppb (8) N/A 0.0 ppb (0) 33.0 ppb (25) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 17, 2020, 11 p.m. 14.0 ppb (13) 3.0 ppb (3) 15.0 ppb (14) 10.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 25.0
 
Jan. 17, 2020, 10 p.m. 14.0 ppb (13) 3.0 ppb (3) 15.6 ppb (14) 11.0 ppb (10) N/A 0.0 ppb (0) 33.0 ppb (25) 0.25 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 17, 2020, 9 p.m. 10.0 ppb (9) 2.0 ppb (2) 11.2 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 17, 2020, 8 p.m. 9.0 ppb (8) 3.0 ppb (3) 9.6 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2020, 7 p.m. 12.0 ppb (11) 5.0 ppb (5) 12.9 ppb (12) 7.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 17, 2020, 6 p.m. 11.0 ppb (10) 5.0 ppb (5) 11.0 ppb (10) 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 28.0
 
Jan. 17, 2020, 5 p.m. 9.0 ppb (8) 4.0 ppb (4) 9.6 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.16 ppb (2) N/A N/A 28.0
 
Jan. 17, 2020, 4 p.m. 11.0 ppb (10) 5.0 ppb (5) 11.7 ppb (11) 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, 3 p.m. 11.0 ppb (10) 5.0 ppb (5) 12.0 ppb (11) 6.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, 2 p.m. 10.0 ppb (9) 4.0 ppb (4) 10.7 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 26.0
 
Jan. 17, 2020, 1 p.m. 11.0 ppb (10) 4.0 ppb (4) 12.6 ppb (12) 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 25.0
 
Jan. 17, 2020, noon 12.0 ppb (11) 4.0 ppb (4) 13.6 ppb (13) 9.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (24) 0.17 ppb (2) N/A -1.0 μg/m3 (0) 24.0
 
Jan. 17, 2020, 11 a.m. 11.0 ppb (10) 3.0 ppb (3) 12.2 ppb (11) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) N/A -3.0 μg/m3 (0) 25.0
 
Jan. 17, 2020, 10 a.m. 9.0 ppb (8) 3.0 ppb (3) 9.7 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A -4.0 μg/m3 (0) 25.0
 
Jan. 17, 2020, 9 a.m. 8.0 ppb (7) 3.0 ppb (3) 8.9 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A -3.0 μg/m3 (0) 25.0
 
Jan. 17, 2020, 8 a.m. 5.0 ppb (5) 2.0 ppb (2) 6.0 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 0.0 μg/m3 (0) 6.0
 
Jan. 17, 2020, 7 a.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 24.0
 
Jan. 17, 2020, 6 a.m. N/A N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) 27.0 ppb (21) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 21.0
 
Jan. 17, 2020, 5 a.m. N/A N/A 8.2 ppb (8) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 20.0
 
Jan. 17, 2020, 4 a.m. 7.0 ppb (6) 3.0 ppb (3) 7.4 ppb (7) 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 20.0
 
Jan. 17, 2020, 3 a.m. 6.0 ppb (6) 2.0 ppb (2) 6.4 ppb (6) 4.0 ppb (4) N/A N/A 25.0 ppb (19) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 19.0
 
Jan. 17, 2020, 2 a.m. 8.0 ppb (7) 3.0 ppb (3) 9.2 ppb (9) 6.0 ppb (6) N/A N/A 22.0 ppb (17) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 17.0
 
Jan. 17, 2020, 1 a.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) 0.18 ppb (2) N/A 0.0 μg/m3 (0) 17.0
 
Jan. 17, 2020, midnight 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 21.0 ppb (16) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 16.0
 
Jan. 16, 2020, 11 p.m. 17.0 ppb (16) 7.0 ppb (6) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 19.0 ppb (15) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 16.0
 
Jan. 16, 2020, 10 p.m. 8.0 ppb (7) 3.0 ppb (3) 8.7 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 25.0 ppb (19) 0.2 ppb (2) N/A 0.0 μg/m3 (0) 19.0
 
Jan. 16, 2020, 9 p.m. 9.0 ppb (8) 4.0 ppb (4) 9.3 ppb (9) 5.0 ppb (5) N/A 1.0 ppb (1) 26.0 ppb (20) 0.19 ppb (2) N/A -2.0 μg/m3 (0) 20.0
 
Jan. 16, 2020, 8 p.m. 9.0 ppb (8) 4.0 ppb (4) 10.1 ppb (9) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A -1.0 μg/m3 (0) 19.0
 
Jan. 16, 2020, 7 p.m. 10.0 ppb (9) 4.0 ppb (4) 10.6 ppb (10) 6.0 ppb (6) N/A 1.0 ppb (1) 20.0 ppb (15) 0.22 ppb (2) N/A 2.0 μg/m3 (8) 15.0
 
Jan. 16, 2020, 6 p.m. 13.0 ppb (12) 6.0 ppb (6) 13.7 ppb (13) 6.0 ppb (6) N/A N/A 20.0 ppb (15) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2020, 5 p.m. 11.0 ppb (10) 6.0 ppb (6) 11.6 ppb (11) 5.0 ppb (5) N/A N/A 20.0 ppb (15) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2020, 4 p.m. N/A N/A 15.9 ppb (15) N/A N/A 1.0 ppb (1) 19.0 ppb (15) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 16, 2020, 3 p.m. N/A N/A 27.4 ppb (25) N/A N/A 1.0 ppb (1) 13.0 ppb (10) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 2 p.m. 31.0 ppb (29) 8.0 ppb (7) 38.0 ppb (35) 22.0 ppb (20) N/A 1.0 ppb (1) 6.0 ppb (5) 0.36 ppb (4) N/A 8.0 μg/m3 (33) 35.0
 
Jan. 16, 2020, 1 p.m. 29.0 ppb (27) 8.0 ppb (7) 32.1 ppb (30) 21.0 ppb (19) N/A 1.0 ppb (1) 9.0 ppb (7) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2020, noon 31.0 ppb (29) 9.0 ppb (8) 34.0 ppb (31) 22.0 ppb (20) N/A 1.0 ppb (1) 8.0 ppb (6) 0.39 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 16, 2020, 11 a.m. 39.0 ppb (36) 12.0 ppb (11) 39.7 ppb (37) 28.0 ppb (26) N/A 1.0 ppb (1) 4.0 ppb (3) 0.4 ppb (4) N/A 3.0 μg/m3 (12) 37.0
 
Jan. 16, 2020, 10 a.m. 38.0 ppb (35) 9.0 ppb (8) 42.1 ppb (39) 29.0 ppb (27) N/A 1.0 ppb (1) 3.0 ppb (2) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 39.0
 
Jan. 16, 2020, 9 a.m. 34.0 ppb (31) 7.0 ppb (6) 38.2 ppb (35) 27.0 ppb (25) N/A 1.0 ppb (1) 2.0 ppb (2) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 16, 2020, 8 a.m. 41.0 ppb (38) 13.0 ppb (12) 44.9 ppb (42) 29.0 ppb (27) N/A 1.0 ppb (1) 1.0 ppb (1) 0.39 ppb (4) N/A 3.0 μg/m3 (12) 42.0
 
Jan. 16, 2020, 7 a.m. 38.0 ppb (35) 10.0 ppb (9) 41.9 ppb (39) 28.0 ppb (26) N/A 1.0 ppb (1) 1.0 ppb (1) 0.4 ppb (4) N/A 4.0 μg/m3 (17) 39.0
 
Jan. 16, 2020, 6 a.m. 44.0 ppb (41) 15.0 ppb (14) 46.6 ppb (43) 29.0 ppb (27) N/A 1.0 ppb (1) 1.0 ppb (1) 0.44 ppb (5) N/A 6.0 μg/m3 (25) 43.0
 
Jan. 16, 2020, 5 a.m. 56.0 ppb (52) 24.0 ppb (22) 59.2 ppb (56) 31.0 ppb (29) N/A 1.0 ppb (1) 0.0 ppb (0) 0.64 ppb (7) N/A 9.0 μg/m3 (38) 56.0
 
Jan. 16, 2020, 4 a.m. 54.0 ppb (50) 23.0 ppb (21) 56.5 ppb (53) 31.0 ppb (29) N/A 1.0 ppb (1) 0.0 ppb (0) 0.59 ppb (7) N/A 9.0 μg/m3 (38) 53.0
 
Jan. 16, 2020, 3 a.m. 48.0 ppb (44) 17.0 ppb (16) 51.7 ppb (48) 31.0 ppb (29) N/A 1.0 ppb (1) 1.0 ppb (1) 0.63 ppb (7) N/A 9.0 μg/m3 (38) 48.0
 
Jan. 16, 2020, 2 a.m. 53.0 ppb (49) 20.0 ppb (19) 56.6 ppb (53) 33.0 ppb (31) N/A 1.0 ppb (1) 1.0 ppb (1) 0.67 ppb (7) N/A 10.0 μg/m3 (42) 53.0
 
Jan. 16, 2020, 1 a.m. 47.0 ppb (44) 16.0 ppb (15) 49.8 ppb (46) 31.0 ppb (29) N/A 1.0 ppb (1) 2.0 ppb (2) 0.67 ppb (7) N/A 8.0 μg/m3 (33) 46.0
 
Jan. 16, 2020, midnight 51.0 ppb (47) 19.0 ppb (18) 55.0 ppb (51) 32.0 ppb (30) N/A 1.0 ppb (1) 2.0 ppb (2) 0.6 ppb (7) N/A 7.0 μg/m3 (29) 51.0
 
Jan. 15, 2020, 11 p.m. 39.0 ppb (36) 11.0 ppb (10) 41.2 ppb (38) 28.0 ppb (26) N/A 1.0 ppb (1) 5.0 ppb (4) 0.59 ppb (7) N/A 8.0 μg/m3 (33) 38.0
 
Jan. 15, 2020, 10 p.m. 25.0 ppb (23) 7.0 ppb (6) 26.3 ppb (24) 18.0 ppb (17) N/A 1.0 ppb (1) 14.0 ppb (11) 0.42 ppb (5) N/A 2.0 μg/m3 (8) 24.0
 
Jan. 15, 2020, 9 p.m. 19.0 ppb (18) 5.0 ppb (5) 21.2 ppb (20) 14.0 ppb (13) N/A 1.0 ppb (1) 20.0 ppb (15) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 20.0
 
Jan. 15, 2020, 8 p.m. 15.0 ppb (14) 5.0 ppb (5) 15.7 ppb (15) 10.0 ppb (9) N/A 1.0 ppb (1) 25.0 ppb (19) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 19.0
 
Jan. 15, 2020, 7 p.m. 13.0 ppb (12) 5.0 ppb (5) 13.3 ppb (12) 8.0 ppb (7) N/A 1.0 ppb (1) 26.0 ppb (20) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 20.0
 
Jan. 15, 2020, 6 p.m. 22.0 ppb (20) 9.0 ppb (8) 22.0 ppb (20) 13.0 ppb (12) N/A 1.0 ppb (1) 21.0 ppb (16) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 20.0
 
Jan. 15, 2020, 5 p.m. 14.0 ppb (13) 5.0 ppb (5) 15.0 ppb (14) 8.0 ppb (7) N/A 1.0 ppb (1) 24.0 ppb (18) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 15, 2020, 4 p.m. 16.0 ppb (15) 7.0 ppb (6) 15.8 ppb (15) 9.0 ppb (8) N/A 1.0 ppb (1) 23.0 ppb (18) N/A N/A 4.0 μg/m3 (17) 18.0