ID: 472

AQSQID: 245100040

Site Name: Oldtown

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

Updated: Sept. 28, 2020, 3:40 p.m.

Location: Baltimore (Old Town), MD

Reporting: True, Located: True

Current AQI: 25.0

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
Sept. 28, 2020, 2 p.m. 18.4 ppb (17) 8.5 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 28, 2020, 1 p.m. 17.5 ppb (16) 7.0 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 28, 2020, noon 16.8 ppb (16) 6.2 ppb (6) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 16.0
 
Sept. 28, 2020, 11 a.m. 16.9 ppb (16) 5.8 ppb (5) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 28, 2020, 10 a.m. 17.3 ppb (16) 5.7 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 16.0
 
Sept. 28, 2020, 9 a.m. 12.5 ppb (12) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 28, 2020, 8 a.m. 10.6 ppb (10) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 28, 2020, 7 a.m. 9.5 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 28, 2020, 6 a.m. 14.6 ppb (14) 2.7 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 28, 2020, 5 a.m. 11.7 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
 
Sept. 28, 2020, 4 a.m. 16.0 ppb (15) 3.0 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 15.0
 
Sept. 28, 2020, 3 a.m. 14.1 ppb (13) 2.3 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 13.0
 
Sept. 28, 2020, 2 a.m. 21.4 ppb (20) 6.3 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 20.0
 
Sept. 28, 2020, 1 a.m. 21.7 ppb (20) 3.6 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 28, 2020, midnight 14.6 ppb (14) 2.7 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 27, 2020, 11 p.m. 10.0 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 27, 2020, 10 p.m. 15.4 ppb (14) 2.8 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 14.0
 
Sept. 27, 2020, 9 p.m. 12.7 ppb (12) 3.5 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 12.0
 
Sept. 27, 2020, 8 p.m. 9.2 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 9.0
 
Sept. 27, 2020, 7 p.m. 7.0 ppb (6) 2.2 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
 
Sept. 27, 2020, 6 p.m. 6.4 ppb (6) 2.5 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 27, 2020, 5 p.m. 8.8 ppb (8) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 27, 2020, 4 p.m. 7.1 ppb (7) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 7.0
 
Sept. 27, 2020, 3 p.m. 8.9 ppb (8) 3.0 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
 
Sept. 27, 2020, 2 p.m. 8.9 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 8.0
 
Sept. 27, 2020, 1 p.m. 8.6 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 8.0
 
Sept. 27, 2020, noon 5.9 ppb (5) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 5.0
 
Sept. 27, 2020, 11 a.m. 7.4 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 7.0
 
Sept. 27, 2020, 10 a.m. 8.7 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 8.0
 
Sept. 27, 2020, 9 a.m. 6.6 ppb (6) 1.1 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
 
Sept. 27, 2020, 8 a.m. 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
Sept. 27, 2020, 7 a.m. 6.7 ppb (6) 1.2 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
 
Sept. 27, 2020, 6 a.m. 7.7 ppb (7) 1.5 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
 
Sept. 27, 2020, 5 a.m. 7.8 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 27, 2020, 4 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 4.0 μg/m3 (17) 17.0
 
Sept. 27, 2020, 3 a.m. 9.0 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 27, 2020, 2 a.m. 11.1 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 27, 2020, 1 a.m. 12.3 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 11.0
 
Sept. 27, 2020, midnight 9.7 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 26, 2020, 11 p.m. 11.8 ppb (11) 2.4 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 11.0
 
Sept. 26, 2020, 10 p.m. 10.8 ppb (10) 3.1 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
 
Sept. 26, 2020, 9 p.m. 9.0 ppb (8) 3.0 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
 
Sept. 26, 2020, 8 p.m. 8.2 ppb (8) 2.8 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
 
Sept. 26, 2020, 7 p.m. 8.8 ppb (8) 2.5 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
 
Sept. 26, 2020, 6 p.m. 6.1 ppb (6) 1.3 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
 
Sept. 26, 2020, 5 p.m. 6.1 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 6.0
 
Sept. 26, 2020, 4 p.m. 9.5 ppb (9) 3.3 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 9.0
 
Sept. 26, 2020, 3 p.m. 10.6 ppb (10) 3.8 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 10.0
 
Sept. 26, 2020, 2 p.m. 12.3 ppb (11) 4.3 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 26, 2020, 1 p.m. 10.7 ppb (10) 3.1 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 26, 2020, noon 8.7 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 26, 2020, 11 a.m. 6.9 ppb (6) 1.3 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
 
Sept. 26, 2020, 10 a.m. 7.5 ppb (7) 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
 
Sept. 26, 2020, 9 a.m. 7.5 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 7.0
 
Sept. 26, 2020, 8 a.m. 15.0 ppb (14) 5.9 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 14.0
 
Sept. 26, 2020, 7 a.m. 7.5 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Sept. 26, 2020, 6 a.m. 8.6 ppb (8) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 26, 2020, 5 a.m. 10.7 ppb (10) 1.2 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
 
Sept. 26, 2020, 4 a.m. 9.3 ppb (9) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 26, 2020, 3 a.m. 14.9 ppb (14) 2.3 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
 
Sept. 26, 2020, 2 a.m. 16.4 ppb (15) 1.9 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 15.0
 
Sept. 26, 2020, 1 a.m. 19.1 ppb (18) 3.8 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 18.0
 
Sept. 26, 2020, midnight 16.0 ppb (15) 2.8 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 15.0
 
Sept. 25, 2020, 11 p.m. 17.7 ppb (16) 2.3 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 25, 2020, 10 p.m. 13.7 ppb (13) 2.7 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 25, 2020, 9 p.m. 11.7 ppb (11) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 25, 2020, 8 p.m. 12.4 ppb (11) 3.2 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 25, 2020, 7 p.m. 14.0 ppb (13) 4.4 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 13.0
 
Sept. 25, 2020, 6 p.m. 17.8 ppb (16) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 25, 2020, 5 p.m. 25.7 ppb (24) 9.0 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 25, 2020, 4 p.m. 32.1 ppb (30) 14.5 ppb (13) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 25, 2020, 3 p.m. 40.5 ppb (38) 20.3 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 25, 2020, 2 p.m. 35.9 ppb (33) 18.5 ppb (17) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 1 p.m. 48.0 ppb (44) 28.1 ppb (26) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Sept. 25, 2020, noon 32.6 ppb (30) 14.0 ppb (13) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Sept. 25, 2020, 11 a.m. 54.6 ppb (51) 30.4 ppb (28) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
Sept. 25, 2020, 10 a.m. 66.5 ppb (63) 41.3 ppb (38) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 63.0
 
Sept. 25, 2020, 9 a.m. 31.4 ppb (29) 9.7 ppb (9) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 8 a.m. 27.2 ppb (25) 5.6 ppb (5) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 7 a.m. 37.2 ppb (34) 11.2 ppb (10) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 34.0
 
Sept. 25, 2020, 6 a.m. 29.0 ppb (27) 4.6 ppb (4) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 5 a.m. 18.4 ppb (17) 0.6 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 25, 2020, 4 a.m. 29.6 ppb (27) 2.9 ppb (3) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 25, 2020, 3 a.m. 21.5 ppb (20) 1.6 ppb (1) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 25, 2020, 2 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 8.0 μg/m3 (33) 33.0
 
Sept. 25, 2020, 1 a.m. 30.3 ppb (28) 2.2 ppb (2) N/A 28.0 ppb (26) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
Sept. 25, 2020, midnight 27.8 ppb (26) 2.2 ppb (2) N/A 26.0 ppb (24) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 24, 2020, 11 p.m. 32.7 ppb (30) 3.7 ppb (3) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 10 p.m. 28.2 ppb (26) 3.4 ppb (3) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 9 p.m. 26.1 ppb (24) 3.6 ppb (3) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 8 p.m. 38.3 ppb (35) 7.8 ppb (7) N/A 30.0 ppb (28) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Sept. 24, 2020, 7 p.m. 49.2 ppb (46) 11.3 ppb (10) N/A 38.0 ppb (35) N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
Sept. 24, 2020, 6 p.m. 57.7 ppb (54) 14.0 ppb (13) N/A 44.0 ppb (41) N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
Sept. 24, 2020, 5 p.m. 43.4 ppb (40) 9.3 ppb (9) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 24, 2020, 4 p.m. 46.2 ppb (43) 11.8 ppb (11) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 3 p.m. 29.4 ppb (27) 5.8 ppb (5) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 24, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 24, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 24, 2020, noon 36.2 ppb (34) 7.7 ppb (7) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 11 a.m. 41.1 ppb (38) 7.0 ppb (6) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 24, 2020, 10 a.m. 22.6 ppb (21) 1.7 ppb (2) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 24, 2020, 9 a.m. 14.6 ppb (14) 1.0 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
 
Sept. 24, 2020, 8 a.m. 10.7 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 24, 2020, 7 a.m. 31.6 ppb (29) 4.4 ppb (4) N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 29.0
 
Sept. 24, 2020, 6 a.m. 12.6 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 24, 2020, 5 a.m. 16.1 ppb (15) 0.8 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
 
Sept. 24, 2020, 4 a.m. 9.5 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 24, 2020, 3 a.m. 12.6 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 24, 2020, 2 a.m. 10.8 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 24, 2020, 1 a.m. 11.0 ppb (10) 0.3 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 24, 2020, midnight 11.8 ppb (11) 0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, 11 p.m. 11.9 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 10 p.m. 9.3 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 23, 2020, 9 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 4.0 μg/m3 (17) 17.0
 
Sept. 23, 2020, 8 p.m. 5.6 ppb (5) 0.7 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
 
Sept. 23, 2020, 7 p.m. 5.4 ppb (5) 0.7 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
 
Sept. 23, 2020, 6 p.m. 7.4 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 5 p.m. 7.0 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 4 p.m. 9.2 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 9.0
 
Sept. 23, 2020, 3 p.m. 9.3 ppb (9) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 23, 2020, 2 p.m. 11.8 ppb (11) 2.9 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, 1 p.m. 14.8 ppb (14) 3.4 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 23, 2020, noon 23.3 ppb (22) 5.1 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
Sept. 23, 2020, 11 a.m. 21.4 ppb (20) 2.7 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 10 a.m. 14.0 ppb (13) 1.3 ppb (1) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 13.0
 
Sept. 23, 2020, 9 a.m. 9.9 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 9.0
 
Sept. 23, 2020, 8 a.m. 9.3 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 23, 2020, 7 a.m. 7.9 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 6 a.m. 17.2 ppb (16) 0.7 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 16.0
 
Sept. 23, 2020, 5 a.m. 11.9 ppb (11) 0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 11.0
 
Sept. 23, 2020, 4 a.m. 8.8 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 8.0
 
Sept. 23, 2020, 3 a.m. 8.0 ppb (7) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, 2 a.m. 12.0 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 1 a.m. 12.4 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 23, 2020, midnight 13.5 ppb (12) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 22, 2020, 11 p.m. 11.7 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 22, 2020, 10 p.m. 9.4 ppb (9) 0.7 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
 
Sept. 22, 2020, 9 p.m. 6.5 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Sept. 22, 2020, 8 p.m. 5.8 ppb (5) 1.0 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
 
Sept. 22, 2020, 7 p.m. 5.9 ppb (5) 1.3 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
 
Sept. 22, 2020, 6 p.m. 5.2 ppb (5) 1.1 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
 
Sept. 22, 2020, 5 p.m. 7.2 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 7.0
 
Sept. 22, 2020, 4 p.m. 6.8 ppb (6) 2.2 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
 
Sept. 22, 2020, 3 p.m. 8.2 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 22, 2020, 2 p.m. 9.5 ppb (9) 3.0 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
 
Sept. 22, 2020, 1 p.m. 22.1 ppb (20) 7.7 ppb (7) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 22, 2020, noon 33.1 ppb (31) 12.6 ppb (12) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 31.0
 
Sept. 22, 2020, 11 a.m. 38.0 ppb (35) 14.5 ppb (13) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 35.0
 
Sept. 22, 2020, 10 a.m. 34.7 ppb (32) 10.0 ppb (9) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 32.0
 
Sept. 22, 2020, 9 a.m. 28.1 ppb (26) 6.5 ppb (6) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2020, 8 a.m. 31.4 ppb (29) 9.3 ppb (9) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2020, 7 a.m. 29.8 ppb (28) 8.1 ppb (8) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
Sept. 22, 2020, 6 a.m. 23.6 ppb (22) 3.9 ppb (4) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2020, 5 a.m. 23.0 ppb (21) 4.0 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2020, 4 a.m. 37.2 ppb (34) 13.0 ppb (12) N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 34.0
 
Sept. 22, 2020, 3 a.m. 33.8 ppb (31) 8.4 ppb (8) N/A 25.0 ppb (23) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 31.0
 
Sept. 22, 2020, 2 a.m. 44.2 ppb (41) 15.1 ppb (14) N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 41.0
 
Sept. 22, 2020, 1 a.m. 53.6 ppb (50) 20.1 ppb (19) N/A 34.0 ppb (31) N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 50.0
 
Sept. 22, 2020, midnight 24.2 ppb (22) 3.1 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 22.0
 
Sept. 21, 2020, 11 p.m. 15.7 ppb (15) 2.5 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
 
Sept. 21, 2020, 10 p.m. 12.3 ppb (11) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 11.0
 
Sept. 21, 2020, 9 p.m. 9.4 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 9.0
 
Sept. 21, 2020, 8 p.m. 7.7 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
 
Sept. 21, 2020, 7 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 3.0 μg/m3 (12) 12.0
 
Sept. 21, 2020, 6 p.m. 8.8 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 8.0
 
Sept. 21, 2020, 5 p.m. 9.3 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Sept. 21, 2020, 4 p.m. 10.0 ppb (9) 5.3 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 9.0
 
Sept. 21, 2020, 3 p.m. 9.6 ppb (9) 5.1 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 9.0