AQSQID: 245100040

Site Name: Oldtown

Location: Baltimore (Old Town), MD

Reporting: True, Located: True

Current AQI: 12.0

Baltimore (Old Town) MD, US: 39.2981, -76.604698

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 18, 2020, 1 p.m. 11.8 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 18, 2020, noon 14.7 ppb (14) 2.3 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2020, 11 a.m. 23.8 ppb (22) 3.4 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2020, 10 a.m. 15.0 ppb (14) 1.9 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2020, 9 a.m. 13.7 ppb (13) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 13.0
 
Jan. 18, 2020, 8 a.m. 11.3 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 10.0
 
Jan. 18, 2020, 7 a.m. 12.7 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 12.0
 
Jan. 18, 2020, 6 a.m. 12.4 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2020, 5 a.m. 15.5 ppb (14) 2.8 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 4 a.m. 26.6 ppb (25) 4.6 ppb (4) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 3 a.m. 29.3 ppb (27) 5.9 ppb (5) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 27.0
 
Jan. 18, 2020, 2 a.m. 36.6 ppb (34) 8.8 ppb (8) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 34.0
 
Jan. 18, 2020, 1 a.m. 22.1 ppb (20) 3.6 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 20.0
 
Jan. 18, 2020, midnight 21.8 ppb (20) 4.1 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2020, 11 p.m. 18.6 ppb (17) 4.1 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2020, 10 p.m. 17.2 ppb (16) 4.8 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 16.0
 
Jan. 17, 2020, 9 p.m. 13.6 ppb (13) 4.9 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 13.0
 
Jan. 17, 2020, 8 p.m. 12.0 ppb (11) 4.7 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 11.0
 
Jan. 17, 2020, 7 p.m. 11.9 ppb (11) 5.3 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 11.0
 
Jan. 17, 2020, 6 p.m. 8.9 ppb (8) 4.1 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 17, 2020, 5 p.m. 7.3 ppb (7) 3.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2020, 4 p.m. 9.5 ppb (9) 4.5 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 17, 2020, 3 p.m. 8.4 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 17, 2020, 2 p.m. 10.7 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 10.0
 
Jan. 17, 2020, 1 p.m. 11.1 ppb (10) 3.7 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 10.0
 
Jan. 17, 2020, noon 11.0 ppb (10) 3.1 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 10.0
 
Jan. 17, 2020, 11 a.m. 8.8 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 8.0
 
Jan. 17, 2020, 10 a.m. 6.3 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 6.0
 
Jan. 17, 2020, 9 a.m. 4.1 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 4.0
 
Jan. 17, 2020, 7 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 3.0
 
Jan. 17, 2020, 6 a.m. 4.1 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2020, 5 a.m. 3.9 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2020, 4 a.m. 4.4 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 4.0
 
Jan. 17, 2020, 3 a.m. 4.1 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 4.0
 
Jan. 17, 2020, 2 a.m. 4.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 17, 2020, 1 a.m. 5.8 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 17, 2020, midnight 6.2 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2020, 11 p.m. 6.1 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2020, 10 p.m. 7.9 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 9 p.m. 8.9 ppb (8) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2020, 8 p.m. 8.4 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 16, 2020, 7 p.m. 8.8 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2020, 6 p.m. 7.7 ppb (7) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2020, 5 p.m. 8.3 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2020, 4 p.m. 6.1 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 6.0
 
Jan. 16, 2020, 3 p.m. 9.1 ppb (8) 3.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 16, 2020, 2 p.m. 9.6 ppb (9) 3.3 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 9.0
 
Jan. 16, 2020, 1 p.m. 13.2 ppb (12) 4.1 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 12.0
 
Jan. 16, 2020, noon 12.8 ppb (12) 2.4 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 12.0
 
Jan. 16, 2020, 11 a.m. 17.2 ppb (16) 4.2 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 10 a.m. 58.1 ppb (54) 33.4 ppb (31) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 54.0
 
Jan. 16, 2020, 9 a.m. 35.1 ppb (32) 10.7 ppb (10) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2020, 8 a.m. 23.7 ppb (22) 2.3 ppb (2) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2020, 7 a.m. 22.2 ppb (21) 1.9 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2020, 6 a.m. 23.5 ppb (22) 3.5 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 5 a.m. 31.3 ppb (29) 6.9 ppb (6) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2020, 4 a.m. 38.2 ppb (35) 13.4 ppb (12) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2020, 3 a.m. 36.9 ppb (34) 9.7 ppb (9) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 34.0
 
Jan. 16, 2020, 2 a.m. 30.3 ppb (28) 6.3 ppb (6) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 16, 2020, 1 a.m. 23.1 ppb (21) 3.7 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 16, 2020, midnight 27.0 ppb (25) 4.6 ppb (4) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2020, 11 p.m. 34.1 ppb (32) 8.4 ppb (8) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 32.0
 
Jan. 15, 2020, 10 p.m. 50.8 ppb (47) 15.9 ppb (15) N/A 35.0 ppb (32) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Jan. 15, 2020, 9 p.m. 34.0 ppb (31) 10.2 ppb (9) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2020, 8 p.m. 33.5 ppb (31) 12.7 ppb (12) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2020, 7 p.m. 42.6 ppb (39) 21.3 ppb (20) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2020, 6 p.m. 55.8 ppb (52) 33.7 ppb (31) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 52.0
 
Jan. 15, 2020, 5 p.m. 60.3 ppb (57) 38.4 ppb (36) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 57.0
 
Jan. 15, 2020, 4 p.m. 48.3 ppb (45) 30.7 ppb (28) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 45.0
 
Jan. 15, 2020, 3 p.m. 34.2 ppb (32) 20.1 ppb (19) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2020, 2 p.m. 86.3 ppb (84) 59.1 ppb (55) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 84.0
 
Jan. 15, 2020, 1 p.m. 100.1 ppb (99) 77.1 ppb (75) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 99.0
 
Jan. 15, 2020, noon 81.8 ppb (80) 59.1 ppb (55) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 80.0
 
Jan. 15, 2020, 11 a.m. 40.0 ppb (37) 18.9 ppb (18) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 37.0
 
Jan. 15, 2020, 10 a.m. 21.7 ppb (20) 4.2 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2020, 9 a.m. 19.6 ppb (18) 2.7 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2020, 8 a.m. 16.0 ppb (15) 1.2 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2020, 7 a.m. 17.3 ppb (16) 2.3 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2020, 6 a.m. 13.9 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, 5 a.m. 15.2 ppb (14) 1.1 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, 4 a.m. 28.8 ppb (27) 7.8 ppb (7) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2020, 3 a.m. 56.6 ppb (53) 32.2 ppb (30) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 53.0
 
Jan. 15, 2020, 2 a.m. 53.9 ppb (50) 30.5 ppb (28) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 50.0
 
Jan. 15, 2020, 1 a.m. 37.4 ppb (35) 15.2 ppb (14) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 35.0
 
Jan. 15, 2020, midnight 36.6 ppb (34) 14.3 ppb (13) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 34.0
 
Jan. 14, 2020, 11 p.m. 39.3 ppb (36) 16.6 ppb (15) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 36.0
 
Jan. 14, 2020, 10 p.m. 41.9 ppb (39) 19.1 ppb (18) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 39.0
 
Jan. 14, 2020, 9 p.m. 40.7 ppb (38) 19.0 ppb (18) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 38.0
 
Jan. 14, 2020, 8 p.m. 28.9 ppb (27) 10.9 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 27.0
 
Jan. 14, 2020, 7 p.m. 32.8 ppb (30) 14.1 ppb (13) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 30.0
 
Jan. 14, 2020, 6 p.m. 36.4 ppb (34) 17.6 ppb (16) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 34.0
 
Jan. 14, 2020, 5 p.m. 36.3 ppb (34) 18.2 ppb (17) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 34.0
 
Jan. 14, 2020, 4 p.m. 42.4 ppb (39) 23.5 ppb (22) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 39.0
 
Jan. 14, 2020, 3 p.m. 47.5 ppb (44) 27.6 ppb (26) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 44.0
 
Jan. 14, 2020, 2 p.m. 53.1 ppb (49) 32.4 ppb (30) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 49.0
 
Jan. 14, 2020, 1 p.m. 67.0 ppb (64) 44.5 ppb (41) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 64.0
 
Jan. 14, 2020, noon 66.7 ppb (64) 45.3 ppb (42) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 64.0
 
Jan. 14, 2020, 11 a.m. 53.3 ppb (49) 35.2 ppb (33) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2020, 10 a.m. 51.7 ppb (48) 33.5 ppb (31) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 48.0
 
Jan. 14, 2020, 9 a.m. 65.0 ppb (62) 45.0 ppb (42) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 62.0
 
Jan. 14, 2020, 8 a.m. 86.0 ppb (84) 64.6 ppb (61) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 84.0
 
Jan. 14, 2020, 7 a.m. 81.0 ppb (79) 60.9 ppb (57) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 79.0
 
Jan. 14, 2020, 6 a.m. 84.9 ppb (83) 64.7 ppb (61) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 83.0
 
Jan. 14, 2020, 5 a.m. 95.0 ppb (94) 73.7 ppb (71) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 94.0
 
Jan. 14, 2020, 4 a.m. 118.4 ppb (103) 92.0 ppb (90) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 103.0
 
Jan. 14, 2020, 3 a.m. 97.9 ppb (97) 73.7 ppb (71) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 97.0
 
Jan. 14, 2020, 2 a.m. 83.3 ppb (81) 59.8 ppb (56) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 81.0
 
Jan. 14, 2020, 1 a.m. 69.2 ppb (66) 45.8 ppb (42) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 66.0
 
Jan. 14, 2020, midnight 68.9 ppb (66) 42.7 ppb (40) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 66.0
 
Jan. 13, 2020, 11 p.m. 63.0 ppb (60) 36.5 ppb (34) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 60.0
 
Jan. 13, 2020, 10 p.m. 48.7 ppb (45) 24.2 ppb (22) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 45.0
 
Jan. 13, 2020, 9 p.m. 39.8 ppb (37) 16.7 ppb (15) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 37.0
 
Jan. 13, 2020, 8 p.m. 65.9 ppb (63) 40.4 ppb (37) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 63.0
 
Jan. 13, 2020, 7 p.m. 42.1 ppb (39) 20.4 ppb (19) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 39.0
 
Jan. 13, 2020, 6 p.m. 29.7 ppb (28) 12.6 ppb (12) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
Jan. 13, 2020, 5 p.m. 32.2 ppb (30) 15.9 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 30.0
 
Jan. 13, 2020, 4 p.m. 29.6 ppb (27) 14.3 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 27.0
 
Jan. 13, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 13, 2020, 2 p.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
 
Jan. 13, 2020, 1 p.m. 38.6 ppb (36) 17.9 ppb (17) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A N/A 36.0
 
Jan. 13, 2020, noon 35.4 ppb (33) 15.0 ppb (14) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 33.0
 
Jan. 13, 2020, 11 a.m. 28.2 ppb (26) 9.8 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 26.0
 
Jan. 13, 2020, 10 a.m. 18.5 ppb (17) 3.7 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 17.0
 
Jan. 13, 2020, 9 a.m. 12.1 ppb (11) 1.2 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 11.0
 
Jan. 13, 2020, 8 a.m. 10.9 ppb (10) 1.3 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2020, 7 a.m. 9.0 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 13, 2020, 6 a.m. 9.4 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 9.0
 
Jan. 13, 2020, 5 a.m. 12.3 ppb (11) 1.9 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 11.0
 
Jan. 13, 2020, 4 a.m. 14.9 ppb (14) 3.4 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 14.0
 
Jan. 13, 2020, 3 a.m. 14.0 ppb (13) 1.9 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 13.0
 
Jan. 13, 2020, 2 a.m. 11.4 ppb (11) 2.5 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 11.0
 
Jan. 13, 2020, 1 a.m. 10.8 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 10.0
 
Jan. 13, 2020, midnight 7.0 ppb (6) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 12, 2020, 11 p.m. 9.8 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2020, 10 p.m. 14.8 ppb (14) 1.2 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2020, 9 p.m. 7.3 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 7.0
 
Jan. 12, 2020, 8 p.m. 3.9 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 4.0
 
Jan. 12, 2020, 7 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 3.0
 
Jan. 12, 2020, 6 p.m. 3.6 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 3.0
 
Jan. 12, 2020, 5 p.m. 4.7 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 12, 2020, 4 p.m. 4.5 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 12, 2020, 3 p.m. 3.6 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -4.0 μg/m3 (0) 3.0
 
Jan. 12, 2020, 2 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 4.0
 
Jan. 12, 2020, 1 p.m. 3.8 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 12, 2020, noon 5.8 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 12, 2020, 11 a.m. 9.0 ppb (8) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 8.0
 
Jan. 12, 2020, 10 a.m. 6.1 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 6.0
 
Jan. 12, 2020, 9 a.m. 8.2 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 8.0
 
Jan. 12, 2020, 8 a.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 4.0
 
Jan. 12, 2020, 7 a.m. 5.5 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 5.0
 
Jan. 12, 2020, 6 a.m. 6.4 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2020, 5 a.m. 13.2 ppb (12) 2.9 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 12, 2020, 4 a.m. 4.0 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 12, 2020, 3 a.m. 3.8 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 12, 2020, 2 a.m. 5.1 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 12, 2020, 1 a.m. 5.9 ppb (5) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 5.0
 
Jan. 12, 2020, midnight 8.3 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 11, 2020, 11 p.m. 8.8 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 11, 2020, 10 p.m. 6.5 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 11, 2020, 9 p.m. 7.9 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 11, 2020, 8 p.m. 8.9 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2020, 7 p.m. 10.1 ppb (9) 3.1 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2020, 6 p.m. 7.6 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 11, 2020, 5 p.m. 7.7 ppb (7) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 11, 2020, 4 p.m. 44.8 ppb (41) 19.0 ppb (18) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 41.0
 
Jan. 11, 2020, 3 p.m. 64.0 ppb (61) 34.0 ppb (31) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 61.0
 
Jan. 11, 2020, 2 p.m. 56.5 ppb (53) 27.7 ppb (26) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 53.0
 
Jan. 11, 2020, 1 p.m. 60.4 ppb (57) 30.0 ppb (28) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 57.0