AQSQID: 245100040

Site Name: Oldtown

Location: Baltimore, MD

Reporting: True, Located: True

Current AQI: 12.0

Baltimore MD, US: 39.2981, -76.604698

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2019, 10 p.m. 6.8 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 9 p.m. 5.8 ppb (5) 1.4 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. 21, 2019, 8 p.m. 4.6 ppb (4) 1.5 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. 21, 2019, 7 p.m. 4.8 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 6 p.m. 3.9 ppb (4) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 5 p.m. 3.4 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 4 p.m. 3.6 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 3 p.m. 3.7 ppb (3) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 3.0
 
Jan. 21, 2019, 2 p.m. 4.1 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 1 p.m. 6.0 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, noon 6.3 ppb (6) 1.1 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. 21, 2019, 11 a.m. 5.4 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 10 a.m. 3.3 ppb (3) 0.3 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. 21, 2019, 9 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 8 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 7 a.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Jan. 21, 2019, 6 a.m. 2.8 ppb (3) 0.3 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. 21, 2019, 5 a.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 21, 2019, 4 a.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 3 a.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 2 a.m. 2.9 ppb (3) 0.2 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. 21, 2019, 1 a.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, midnight 3.9 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 11 p.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 10 p.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 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, 9 p.m. 4.0 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. 20, 2019, 8 p.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 7 p.m. 4.2 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 6 p.m. 5.4 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 5 p.m. 5.8 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 4 p.m. 6.8 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 3 p.m. 7.4 ppb (7) 2.1 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. 20, 2019, 2 p.m. 7.8 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, 1 p.m. 12.0 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, noon 47.8 ppb (44) 21.1 ppb (20) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 44.0
 
Jan. 20, 2019, 11 a.m. 59.4 ppb (56) 27.1 ppb (25) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 56.0
 
Jan. 20, 2019, 10 a.m. 22.4 ppb (21) 1.4 ppb (1) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 9 a.m. 14.0 ppb (13) 0.7 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. 20, 2019, 8 a.m. 12.8 ppb (12) 0.8 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 12.0
 
Jan. 20, 2019, 7 a.m. 12.3 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 11.0
 
Jan. 20, 2019, 6 a.m. 11.2 ppb (10) 1.4 ppb (1) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, 5 a.m. 14.6 ppb (14) 2.1 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 4 a.m. 14.8 ppb (14) 2.3 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 3 a.m. 15.6 ppb (14) 3.7 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 2 a.m. 14.5 ppb (13) 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 20, 2019, 1 a.m. 15.2 ppb (14) 4.6 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 20, 2019, midnight 13.8 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 11 p.m. 16.8 ppb (16) 4.9 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 10 p.m. 17.0 ppb (16) 4.5 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 9 p.m. 18.5 ppb (17) 5.2 ppb (5) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 8 p.m. 19.8 ppb (18) 6.9 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 7 p.m. 17.4 ppb (16) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 6 p.m. 16.7 ppb (15) 5.4 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 5 p.m. 19.0 ppb (18) 6.7 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 19, 2019, 4 p.m. 19.8 ppb (18) 6.7 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 20.0 μg/m3 (67) 67.0
 
Jan. 19, 2019, 3 p.m. 21.0 ppb (19) 7.4 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 19, 2019, 2 p.m. 20.9 ppb (19) 6.2 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 24.0 μg/m3 (76) 76.0
 
Jan. 19, 2019, 1 p.m. 39.2 ppb (36) 19.2 ppb (18) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 26.0 μg/m3 (80) 80.0
 
Jan. 19, 2019, noon 40.0 ppb (37) 18.0 ppb (17) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 24.0 μg/m3 (76) 76.0
 
Jan. 19, 2019, 11 a.m. 37.2 ppb (34) 15.6 ppb (14) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 25.0 μg/m3 (78) 78.0
 
Jan. 19, 2019, 10 a.m. 58.7 ppb (55) 34.7 ppb (32) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 27.0 μg/m3 (82) 82.0
 
Jan. 19, 2019, 9 a.m. 77.2 ppb (75) 51.8 ppb (48) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 75.0
 
Jan. 19, 2019, 8 a.m. 78.4 ppb (76) 52.6 ppb (49) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 76.0
 
Jan. 19, 2019, 7 a.m. 73.7 ppb (71) 50.4 ppb (47) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 23.0 μg/m3 (73) 73.0
 
Jan. 19, 2019, 6 a.m. 90.4 ppb (89) 65.0 ppb (62) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 24.0 μg/m3 (76) 89.0
 
Jan. 19, 2019, 5 a.m. 121.0 ppb (104) 94.2 ppb (93) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 24.0 μg/m3 (76) 104.0
 
Jan. 19, 2019, 4 a.m. 102.1 ppb (100) 73.5 ppb (71) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 21.0 μg/m3 (69) 100.0
 
Jan. 19, 2019, 3 a.m. 99.2 ppb (98) 69.9 ppb (67) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 27.0 μg/m3 (82) 98.0
 
Jan. 19, 2019, 2 a.m. 81.3 ppb (79) 51.0 ppb (47) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 79.0
 
Jan. 19, 2019, 1 a.m. 73.0 ppb (70) 43.0 ppb (40) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 28.0 μg/m3 (84) 84.0
 
Jan. 19, 2019, midnight 62.7 ppb (59) 33.1 ppb (31) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 11 p.m. 58.4 ppb (55) 28.0 ppb (26) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Jan. 18, 2019, 10 p.m. 59.5 ppb (56) 28.0 ppb (26) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 20.0 μg/m3 (67) 67.0
 
Jan. 18, 2019, 9 p.m. 59.9 ppb (56) 29.2 ppb (27) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 20.0 μg/m3 (67) 67.0
 
Jan. 18, 2019, 8 p.m. 49.6 ppb (46) 23.5 ppb (22) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 22.0 μg/m3 (71) 71.0
 
Jan. 18, 2019, 7 p.m. 25.9 ppb (24) 11.0 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 6 p.m. 24.5 ppb (23) 10.5 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 5 p.m. 41.0 ppb (38) 19.8 ppb (18) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 21.0 μg/m3 (69) 69.0
 
Jan. 18, 2019, 4 p.m. 63.4 ppb (60) 34.7 ppb (32) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 25.0 μg/m3 (78) 78.0
 
Jan. 18, 2019, 3 p.m. 56.2 ppb (52) 27.9 ppb (26) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 21.0 μg/m3 (69) 69.0
 
Jan. 18, 2019, 2 p.m. 45.4 ppb (42) 21.1 ppb (20) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 18, 2019, 1 p.m. 50.1 ppb (46) 23.4 ppb (22) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, noon 34.6 ppb (32) 12.0 ppb (11) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 11 a.m. 26.6 ppb (25) 6.6 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 10 a.m. 20.7 ppb (19) 4.6 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 9 a.m. 16.9 ppb (16) 1.8 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 8 a.m. 13.0 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 7 a.m. 12.5 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 6 a.m. 15.4 ppb (14) 3.4 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 18, 2019, 5 a.m. 13.6 ppb (13) 2.5 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 4 a.m. 15.5 ppb (14) 3.5 ppb (3) 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, 2019, 3 a.m. 21.5 ppb (20) 5.6 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 2 a.m. 20.5 ppb (19) 4.8 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 1 a.m. 15.4 ppb (14) 2.7 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, midnight 17.8 ppb (16) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 11 p.m. 26.2 ppb (24) 7.7 ppb (7) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 10 p.m. 32.6 ppb (30) 12.7 ppb (12) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, 9 p.m. 27.8 ppb (26) 9.6 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 8 p.m. 23.1 ppb (21) 7.8 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 17, 2019, 7 p.m. 20.7 ppb (19) 7.1 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 6 p.m. 21.2 ppb (20) 8.1 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 5 p.m. 21.3 ppb (20) 8.3 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A N/A 20.0
 
Jan. 17, 2019, 4 p.m. 18.0 ppb (17) 6.8 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 3 p.m. 25.0 ppb (23) 11.6 ppb (11) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 2 p.m. 26.2 ppb (24) 11.8 ppb (11) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 1 p.m. 34.9 ppb (32) 17.8 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 32.0
 
Jan. 17, 2019, noon 32.8 ppb (30) 12.7 ppb (12) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 30.0
 
Jan. 17, 2019, 11 a.m. 24.3 ppb (23) 8.2 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 23.0
 
Jan. 17, 2019, 10 a.m. 25.9 ppb (24) 6.5 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 9 a.m. 19.7 ppb (18) 2.5 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 8 a.m. 16.7 ppb (15) 0.8 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 7 a.m. 15.8 ppb (15) 1.3 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 6 a.m. 16.0 ppb (15) 2.1 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 5 a.m. 14.1 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 4 a.m. 15.8 ppb (15) 1.8 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 3 a.m. 13.9 ppb (13) 1.6 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 17, 2019, 2 a.m. 9.5 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 1 a.m. 13.0 ppb (12) 1.3 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, midnight 17.4 ppb (16) 2.1 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 11 p.m. 21.7 ppb (20) 4.0 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 10 p.m. 21.0 ppb (19) 4.9 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 9 p.m. 20.5 ppb (19) 5.5 ppb (5) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 8 p.m. 14.0 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 7 p.m. 14.5 ppb (13) 4.6 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2019, 6 p.m. 15.4 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 16, 2019, 5 p.m. 17.2 ppb (16) 5.8 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 4 p.m. 27.1 ppb (25) 8.8 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 16, 2019, 3 p.m. 44.6 ppb (41) 18.3 ppb (17) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 2 p.m. 45.8 ppb (42) 16.8 ppb (16) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 16, 2019, 1 p.m. 64.4 ppb (61) 29.7 ppb (28) N/A 35.0 ppb (32) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 16, 2019, noon 65.7 ppb (62) 30.8 ppb (29) N/A 35.0 ppb (32) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 62.0
 
Jan. 16, 2019, 11 a.m. 64.2 ppb (61) 28.2 ppb (26) N/A 36.0 ppb (33) N/A N/A N/A N/A N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 10 a.m. 69.3 ppb (66) 33.0 ppb (31) N/A 36.0 ppb (33) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 66.0
 
Jan. 16, 2019, 9 a.m. 53.6 ppb (50) 19.8 ppb (18) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 16, 2019, 8 a.m. 41.6 ppb (39) 9.6 ppb (9) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 7 a.m. 50.3 ppb (47) 14.6 ppb (14) N/A 36.0 ppb (33) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 16, 2019, 6 a.m. 44.8 ppb (41) 10.4 ppb (10) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, 5 a.m. 31.5 ppb (29) 3.5 ppb (3) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 4 a.m. 33.7 ppb (31) 4.6 ppb (4) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 16, 2019, 3 a.m. 35.2 ppb (33) 4.8 ppb (4) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, 2 a.m. 32.5 ppb (30) 4.4 ppb (4) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 1 a.m. 37.7 ppb (35) 6.2 ppb (6) N/A 32.0 ppb (30) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, midnight 30.7 ppb (28) 3.7 ppb (3) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 15, 2019, 11 p.m. 33.7 ppb (31) 5.3 ppb (5) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 15, 2019, 10 p.m. 27.5 ppb (25) 4.5 ppb (4) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 20.0 μg/m3 (67) 67.0
 
Jan. 15, 2019, 9 p.m. 15.7 ppb (15) 3.0 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 15, 2019, 8 p.m. 12.5 ppb (12) 2.9 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 15, 2019, 7 p.m. 14.6 ppb (14) 3.7 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 15, 2019, 6 p.m. 12.6 ppb (12) 3.4 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 18.0 μg/m3 (63) 63.0
 
Jan. 15, 2019, 5 p.m. 15.0 ppb (14) 5.5 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 15, 2019, 4 p.m. 12.7 ppb (12) 4.6 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 3 p.m. 13.8 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, 2 p.m. 27.4 ppb (25) 11.2 ppb (10) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, 1 p.m. 53.1 ppb (49) 25.4 ppb (24) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, noon 64.0 ppb (61) 30.5 ppb (28) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 61.0
 
Jan. 15, 2019, 11 a.m. 46.4 ppb (43) 15.9 ppb (15) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, 10 a.m. 43.7 ppb (40) 12.9 ppb (12) N/A 31.0 ppb (29) N/A N/A N/A N/A N/A 20.0 μg/m3 (67) 67.0
 
Jan. 15, 2019, 9 a.m. 29.8 ppb (28) 3.9 ppb (4) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
Jan. 15, 2019, 8 a.m. 25.4 ppb (24) 1.8 ppb (2) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A N/A 24.0
 
Jan. 15, 2019, 7 a.m. 24.5 ppb (23) 1.2 ppb (1) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A N/A 23.0
 
Jan. 15, 2019, 6 a.m. 25.4 ppb (24) 1.7 ppb (2) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A N/A 24.0
 
Jan. 15, 2019, 5 a.m. 32.8 ppb (30) 4.4 ppb (4) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A N/A 30.0
 
Jan. 15, 2019, 4 a.m. 25.6 ppb (24) 1.5 ppb (1) 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, 2019, 3 a.m. 30.2 ppb (28) 2.0 ppb (2) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 20.0 μg/m3 (67) 67.0
 
Jan. 15, 2019, 2 a.m. 45.3 ppb (42) 9.8 ppb (9) N/A 35.0 ppb (32) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, 1 a.m. 40.6 ppb (38) 7.6 ppb (7) N/A 33.0 ppb (31) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 15, 2019, midnight 32.6 ppb (30) 4.1 ppb (4) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2019, 11 p.m. 33.6 ppb (31) 3.9 ppb (4) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0