ID: 2375

AQSQID: 240270006

Site Name: Howard County Near Road

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

Updated: July 6, 2020, 7:35 p.m.

Location: Laurel (I 95), MD

Reporting: True, Located: True

Current AQI: 71.0

Laurel (I 95) MD, US: 39.143197, -76.846192

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 6, 2020, 6 p.m. 26.0 ppb (24) 9.7 ppb (9) N/A 16.0 ppb (15) N/A N/A N/A 0.38 ppb (4) N/A 22.0 μg/m3 (71) 71.0
 
July 6, 2020, 5 p.m. 33.3 ppb (31) 11.8 ppb (11) N/A 22.0 ppb (20) N/A N/A N/A 0.4 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
July 6, 2020, 4 p.m. 33.8 ppb (31) 11.5 ppb (11) N/A 22.0 ppb (20) N/A N/A N/A 0.38 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
July 6, 2020, 3 p.m. 32.3 ppb (30) 12.8 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.38 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
July 6, 2020, 2 p.m. 45.8 ppb (42) 25.8 ppb (24) N/A 20.0 ppb (19) N/A N/A N/A 0.41 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
July 6, 2020, 1 p.m. 47.1 ppb (44) 28.5 ppb (26) N/A 19.0 ppb (18) N/A N/A N/A 0.38 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
July 6, 2020, noon 63.3 ppb (60) 43.3 ppb (40) N/A 20.0 ppb (19) N/A N/A N/A 0.45 ppb (5) N/A 26.0 μg/m3 (80) 80.0
 
July 6, 2020, 11 a.m. 57.6 ppb (54) 41.4 ppb (38) N/A 16.0 ppb (15) N/A N/A N/A 0.47 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
July 6, 2020, 10 a.m. 46.1 ppb (43) 31.1 ppb (29) N/A 15.0 ppb (14) N/A N/A N/A 0.39 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
July 6, 2020, 9 a.m. 55.7 ppb (52) 39.3 ppb (36) N/A 16.0 ppb (15) N/A N/A N/A 0.48 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
July 6, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.39 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
July 6, 2020, 7 a.m. 78.4 ppb (76) 57.4 ppb (54) N/A 21.0 ppb (19) N/A N/A N/A 0.41 ppb (5) N/A 17.0 μg/m3 (61) 76.0
 
July 6, 2020, 6 a.m. 64.1 ppb (61) 42.4 ppb (39) N/A 22.0 ppb (20) N/A N/A N/A 0.39 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
July 6, 2020, 5 a.m. 72.9 ppb (70) 47.8 ppb (44) N/A 25.0 ppb (23) N/A N/A N/A 0.41 ppb (5) N/A 16.0 μg/m3 (59) 70.0
 
July 6, 2020, 4 a.m. 63.0 ppb (60) 37.0 ppb (34) N/A 26.0 ppb (24) N/A N/A N/A 0.44 ppb (5) N/A 14.0 μg/m3 (54) 60.0
 
July 6, 2020, 3 a.m. 28.0 ppb (26) 11.2 ppb (10) N/A 17.0 ppb (16) N/A N/A N/A 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 6, 2020, 2 a.m. 19.0 ppb (18) 5.5 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A 0.22 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
July 6, 2020, 1 a.m. 19.1 ppb (18) 5.1 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.23 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
July 6, 2020, midnight 21.0 ppb (19) 6.0 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.25 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
July 5, 2020, 11 p.m. 28.7 ppb (27) 14.0 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 5, 2020, 10 p.m. 19.4 ppb (18) 7.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
July 5, 2020, 9 p.m. 11.7 ppb (11) 4.2 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 5, 2020, 8 p.m. 13.1 ppb (12) 5.1 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.37 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
July 5, 2020, 7 p.m. 13.3 ppb (12) 4.8 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.3 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
July 5, 2020, 6 p.m. 10.8 ppb (10) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
July 5, 2020, 5 p.m. 10.8 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
July 5, 2020, 4 p.m. 10.3 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 21.0 μg/m3 (69) 69.0
 
July 5, 2020, 3 p.m. 8.0 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
July 5, 2020, 2 p.m. 9.8 ppb (9) 3.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
July 5, 2020, 1 p.m. 8.4 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 18.0 μg/m3 (63) 63.0
 
July 5, 2020, noon 9.0 ppb (8) 3.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 20.0 μg/m3 (67) 67.0
 
July 5, 2020, 11 a.m. 24.2 ppb (22) 12.3 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
July 5, 2020, 10 a.m. 16.1 ppb (15) 6.5 ppb (6) N/A 10.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
July 5, 2020, 9 a.m. 23.6 ppb (22) 10.9 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.31 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
July 5, 2020, 8 a.m. 28.2 ppb (26) 16.1 ppb (15) N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 28.0 μg/m3 (84) 84.0
 
July 5, 2020, 7 a.m. 22.4 ppb (21) 9.0 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.38 ppb (4) N/A 35.0 μg/m3 (99) 99.0
 
July 5, 2020, 6 a.m. 33.6 ppb (31) 17.7 ppb (16) N/A 16.0 ppb (15) N/A N/A N/A 0.56 ppb (6) N/A 50.0 μg/m3 (136) 136.0
 
July 5, 2020, 5 a.m. 28.2 ppb (26) 14.4 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.66 ppb (7) N/A 53.0 μg/m3 (144) 144.0
 
July 5, 2020, 4 a.m. 15.6 ppb (14) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 72.0 μg/m3 (159) 159.0
 
July 5, 2020, 3 a.m. 26.0 ppb (24) 7.9 ppb (7) N/A 18.0 ppb (17) N/A N/A N/A 0.41 ppb (5) N/A 62.0 μg/m3 (153) 153.0
 
July 5, 2020, 2 a.m. 21.0 ppb (19) 3.4 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.39 ppb (4) N/A 39.0 μg/m3 (109) 109.0
 
July 5, 2020, 1 a.m. 19.4 ppb (18) 2.6 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 22.0 μg/m3 (71) 71.0
 
July 5, 2020, midnight 18.9 ppb (18) 4.7 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.42 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
July 4, 2020, 11 p.m. 8.6 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
July 4, 2020, 10 p.m. 16.2 ppb (15) 5.6 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.37 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 4, 2020, 9 p.m. 17.7 ppb (16) 7.1 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
July 4, 2020, 8 p.m. 15.5 ppb (14) 6.5 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.33 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
July 4, 2020, 7 p.m. 12.8 ppb (12) 5.4 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 4, 2020, 6 p.m. 10.9 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, 5 p.m. 9.2 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 4 p.m. 10.5 ppb (10) 3.6 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
July 4, 2020, 3 p.m. 13.8 ppb (13) 4.6 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.29 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
July 4, 2020, 2 p.m. 11.0 ppb (10) 3.6 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, 1 p.m. 11.1 ppb (10) 4.4 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 4, 2020, noon 15.9 ppb (15) 7.1 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 4, 2020, 11 a.m. 28.3 ppb (26) 15.5 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A 0.25 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
July 4, 2020, 10 a.m. 26.9 ppb (25) 13.1 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
July 4, 2020, 9 a.m. 21.3 ppb (20) 8.3 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, 8 a.m. 30.3 ppb (28) 12.7 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 4, 2020, 7 a.m. 35.8 ppb (33) 14.2 ppb (13) N/A 22.0 ppb (20) N/A N/A N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 4, 2020, 6 a.m. 37.7 ppb (35) 17.6 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 7.0 μg/m3 (29) 35.0
 
July 4, 2020, 5 a.m. 16.9 ppb (16) 4.4 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 4, 2020, 4 a.m. 16.5 ppb (15) 4.2 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
July 4, 2020, 3 a.m. 11.6 ppb (11) 2.4 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.21 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
July 4, 2020, 2 a.m. 18.0 ppb (17) 3.8 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.25 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
July 4, 2020, 1 a.m. 17.7 ppb (16) 4.2 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
July 4, 2020, midnight 22.4 ppb (21) 6.5 ppb (6) N/A 16.0 ppb (15) N/A N/A N/A 0.25 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
July 3, 2020, 11 p.m. 17.7 ppb (16) 4.5 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 3, 2020, 10 p.m. 10.5 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.21 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 9 p.m. 7.1 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 3, 2020, 8 p.m. 10.6 ppb (10) 3.6 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 3, 2020, 7 p.m. 8.6 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, 6 p.m. 6.2 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
July 3, 2020, 5 p.m. 4.9 ppb (5) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
July 3, 2020, 4 p.m. 7.5 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, 3 p.m. 13.4 ppb (12) 5.4 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 3, 2020, 2 p.m. 12.3 ppb (11) 4.2 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.19 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 1 p.m. 9.6 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, noon 21.1 ppb (20) 9.8 ppb (9) N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 11 a.m. 28.1 ppb (26) 14.5 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
July 3, 2020, 10 a.m. 61.0 ppb (57) 40.1 ppb (37) N/A 21.0 ppb (19) N/A N/A N/A 0.24 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
July 3, 2020, 9 a.m. 58.7 ppb (55) 37.5 ppb (35) N/A 21.0 ppb (19) N/A N/A N/A 0.24 ppb (3) N/A 13.0 μg/m3 (52) 55.0
 
July 3, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 3, 2020, 7 a.m. 57.3 ppb (54) 35.4 ppb (33) N/A 22.0 ppb (20) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 54.0
 
July 3, 2020, 6 a.m. 64.9 ppb (62) 40.9 ppb (38) N/A 24.0 ppb (22) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 62.0
 
July 3, 2020, 5 a.m. 57.6 ppb (54) 34.2 ppb (32) N/A 23.0 ppb (21) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 54.0
 
July 3, 2020, 4 a.m. 35.2 ppb (33) 17.7 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, 3 a.m. 32.7 ppb (30) 16.5 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
July 3, 2020, 2 a.m. 38.2 ppb (35) 20.4 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 3, 2020, 1 a.m. 16.5 ppb (15) 5.9 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A 0.3 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
July 3, 2020, midnight 10.9 ppb (10) 3.2 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
July 2, 2020, 11 p.m. 9.9 ppb (9) 3.2 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 2, 2020, 10 p.m. 9.2 ppb (9) 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 2, 2020, 9 p.m. 13.2 ppb (12) 3.9 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 8 p.m. 9.1 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 7 p.m. 12.5 ppb (12) 4.3 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 6 p.m. 15.8 ppb (15) 7.2 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 5 p.m. 10.5 ppb (10) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 2, 2020, 4 p.m. 8.5 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 2, 2020, 3 p.m. 11.0 ppb (10) 4.3 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 2, 2020, 2 p.m. 12.9 ppb (12) 5.8 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 2, 2020, 1 p.m. 14.0 ppb (13) 6.2 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 2, 2020, noon 17.6 ppb (16) 7.7 ppb (7) N/A 10.0 ppb (9) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 2, 2020, 11 a.m. 25.6 ppb (24) 12.8 ppb (12) N/A 13.0 ppb (12) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 10 a.m. 43.4 ppb (40) 26.2 ppb (24) N/A 17.0 ppb (16) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 40.0
 
July 2, 2020, 9 a.m. 32.9 ppb (30) 19.5 ppb (18) N/A 13.0 ppb (12) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 30.0
 
July 2, 2020, 8 a.m. 11.8 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 7 a.m. 29.3 ppb (27) 17.1 ppb (16) N/A 12.0 ppb (11) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
July 2, 2020, 6 a.m. 15.3 ppb (14) 6.3 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 2, 2020, 5 a.m. 26.5 ppb (25) 14.5 ppb (13) N/A 12.0 ppb (11) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 4 a.m. 31.3 ppb (29) 14.5 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
July 2, 2020, 3 a.m. 53.2 ppb (49) 22.6 ppb (21) N/A 31.0 ppb (29) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 49.0
 
July 2, 2020, 2 a.m. 50.8 ppb (47) 20.0 ppb (19) N/A 31.0 ppb (29) N/A N/A N/A 0.26 ppb (3) N/A 7.0 μg/m3 (29) 47.0
 
July 2, 2020, 1 a.m. 55.6 ppb (52) 20.5 ppb (19) N/A 35.0 ppb (32) N/A N/A N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 52.0
 
July 2, 2020, midnight 37.0 ppb (34) 9.9 ppb (9) N/A 27.0 ppb (25) N/A N/A N/A 0.3 ppb (3) N/A 8.0 μg/m3 (33) 34.0
 
July 1, 2020, 11 p.m. 24.1 ppb (22) 7.4 ppb (7) N/A 17.0 ppb (16) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
July 1, 2020, 10 p.m. 25.4 ppb (24) 9.0 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 1, 2020, 9 p.m. 33.5 ppb (31) 14.8 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 31.0
 
July 1, 2020, 8 p.m. 26.7 ppb (25) 12.2 ppb (11) N/A 15.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 1, 2020, 7 p.m. 10.9 ppb (10) 2.9 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 1, 2020, 6 p.m. 8.2 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 1, 2020, 5 p.m. 9.8 ppb (9) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 1, 2020, 4 p.m. 9.6 ppb (9) 3.7 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 1, 2020, 3 p.m. 12.8 ppb (12) 4.3 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
July 1, 2020, 2 p.m. 16.2 ppb (15) 7.2 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 1, 2020, 1 p.m. 22.4 ppb (21) 11.0 ppb (10) N/A 11.0 ppb (10) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
July 1, 2020, noon 26.8 ppb (25) 13.3 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
July 1, 2020, 11 a.m. 40.1 ppb (37) 23.7 ppb (22) N/A 16.0 ppb (15) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 37.0
 
July 1, 2020, 10 a.m. 35.5 ppb (33) 19.6 ppb (18) N/A 16.0 ppb (15) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
July 1, 2020, 9 a.m. 38.0 ppb (35) 19.0 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 35.0
 
July 1, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 1, 2020, 7 a.m. 25.1 ppb (23) 10.5 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
July 1, 2020, 6 a.m. 27.0 ppb (25) 9.7 ppb (9) N/A 17.0 ppb (16) N/A N/A N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 1, 2020, 5 a.m. 39.2 ppb (36) 12.8 ppb (12) N/A 26.0 ppb (24) N/A N/A N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 36.0
 
July 1, 2020, 4 a.m. 43.6 ppb (40) 17.4 ppb (16) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 40.0
 
July 1, 2020, 3 a.m. 39.3 ppb (36) 11.1 ppb (10) N/A 28.0 ppb (26) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 36.0
 
July 1, 2020, 2 a.m. 27.6 ppb (26) 8.8 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
July 1, 2020, 1 a.m. 33.5 ppb (31) 10.1 ppb (9) N/A 23.0 ppb (21) N/A N/A N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 1, 2020, midnight 30.9 ppb (29) 10.8 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
June 30, 2020, 11 p.m. 25.2 ppb (23) 8.0 ppb (7) N/A 17.0 ppb (16) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 30, 2020, 10 p.m. 12.1 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
June 30, 2020, 9 p.m. 8.7 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
June 30, 2020, 8 p.m. 15.2 ppb (14) 6.6 ppb (6) N/A 9.0 ppb (8) N/A N/A N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 14.0
 
June 30, 2020, 7 p.m. 13.5 ppb (12) 5.5 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
June 30, 2020, 6 p.m. 7.3 ppb (7) 3.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
June 30, 2020, 5 p.m. 10.8 ppb (10) 4.5 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 30, 2020, 4 p.m. 9.7 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
June 30, 2020, 3 p.m. 11.8 ppb (11) 4.9 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 30, 2020, 2 p.m. 16.8 ppb (16) 7.6 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.21 ppb (2) N/A N/A 16.0
 
June 30, 2020, 1 p.m. 20.2 ppb (19) 9.8 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
June 30, 2020, noon 18.5 ppb (17) 8.3 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
June 30, 2020, 11 a.m. 31.6 ppb (29) 18.2 ppb (17) N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
June 30, 2020, 10 a.m. 47.6 ppb (44) 31.4 ppb (29) N/A 16.0 ppb (15) N/A N/A N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 44.0
 
June 30, 2020, 9 a.m. 42.6 ppb (39) 26.5 ppb (25) N/A 16.0 ppb (15) N/A N/A N/A 0.26 ppb (3) N/A 8.0 μg/m3 (33) 39.0
 
June 30, 2020, 8 a.m. 44.2 ppb (41) 27.9 ppb (26) N/A 16.0 ppb (15) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 41.0
 
June 30, 2020, 7 a.m. 48.2 ppb (45) 29.8 ppb (28) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
June 30, 2020, 6 a.m. 42.3 ppb (39) 25.0 ppb (23) N/A 17.0 ppb (16) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 39.0
 
June 30, 2020, 5 a.m. 23.2 ppb (21) 11.4 ppb (11) N/A 12.0 ppb (11) N/A N/A N/A 0.21 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
June 30, 2020, 4 a.m. 96.5 ppb (95) 70.5 ppb (68) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 95.0
 
June 30, 2020, 3 a.m. 86.5 ppb (85) 58.9 ppb (55) N/A 28.0 ppb (26) N/A N/A N/A 0.24 ppb (3) N/A 12.0 μg/m3 (50) 85.0
 
June 30, 2020, 2 a.m. 41.6 ppb (39) 24.6 ppb (23) N/A 17.0 ppb (16) N/A N/A N/A 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
June 30, 2020, 1 a.m. 50.2 ppb (46) 28.2 ppb (26) N/A 22.0 ppb (20) N/A N/A N/A 0.17 ppb (2) N/A 9.0 μg/m3 (38) 46.0
 
June 30, 2020, midnight 23.7 ppb (22) 11.1 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
June 29, 2020, 11 p.m. 39.9 ppb (37) 20.0 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
June 29, 2020, 10 p.m. 33.8 ppb (31) 15.1 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
June 29, 2020, 9 p.m. 19.2 ppb (18) 7.6 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
June 29, 2020, 8 p.m. 13.6 ppb (13) 5.9 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
June 29, 2020, 7 p.m. 10.8 ppb (10) 4.7 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0