ID: 472

AQSQID: 245100040

Site Name: Oldtown

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

Updated: Oct. 21, 2021, 6:05 p.m.

Location: Baltimore (Old Town), MD

Reporting: True, Located: True

Current AQI: 53.0

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
Oct. 14, 2021, 4 p.m. 8.1 ppb (8) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A N/A 8.0
 
Oct. 14, 2021, 3 p.m. 11.1 ppb (11) 4.5 ppb (5) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A N/A 11.0
 
Oct. 14, 2021, 2 p.m. 9.8 ppb (10) 3.5 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 14, 2021, 1 p.m. 11.5 ppb (11) 3.7 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 11.0
 
Oct. 14, 2021, noon 23.8 ppb (23) 9.4 ppb (9) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 23.0
 
Oct. 14, 2021, 11 a.m. 22.2 ppb (21) 8.3 ppb (8) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
Oct. 14, 2021, 10 a.m. 12.3 ppb (12) 2.1 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 14, 2021, 9 a.m. 24.0 ppb (23) 10.6 ppb (10) N/A 13.0 ppb (13) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 23.0
 
Oct. 14, 2021, 8 a.m. 21.2 ppb (20) 8.0 ppb (8) N/A 13.0 ppb (13) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 20.0
 
Oct. 14, 2021, 7 a.m. 15.0 ppb (15) 1.9 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 15.0
 
Oct. 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 14, 2021, 5 a.m. 49.9 ppb (48) 34.5 ppb (33) N/A 15.0 ppb (15) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 48.0
 
Oct. 14, 2021, 4 a.m. 49.0 ppb (47) 31.6 ppb (30) N/A 17.0 ppb (17) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 47.0
 
Oct. 14, 2021, 3 a.m. 43.6 ppb (42) 20.3 ppb (20) N/A 23.0 ppb (22) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 42.0
 
Oct. 14, 2021, 2 a.m. 30.9 ppb (30) 8.1 ppb (8) N/A 23.0 ppb (22) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 30.0
 
Oct. 14, 2021, 1 a.m. 36.1 ppb (35) 11.1 ppb (11) N/A 25.0 ppb (24) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 35.0
 
Oct. 14, 2021, midnight 40.2 ppb (38) 14.9 ppb (15) N/A 25.0 ppb (24) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 38.0
 
Oct. 13, 2021, 11 p.m. 31.1 ppb (30) 7.0 ppb (7) N/A 24.0 ppb (23) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 30.0
 
Oct. 13, 2021, 10 p.m. 17.5 ppb (17) 3.1 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Oct. 13, 2021, 9 p.m. 9.8 ppb (10) 1.6 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 10.0
 
Oct. 13, 2021, 8 p.m. 20.1 ppb (19) 4.1 ppb (4) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 19.0
 
Oct. 13, 2021, 7 p.m. 9.8 ppb (10) 2.3 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 10.0
 
Oct. 13, 2021, 6 p.m. 27.0 ppb (26) 8.5 ppb (9) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 26.0
 
Oct. 13, 2021, 5 p.m. 30.2 ppb (29) 9.2 ppb (9) N/A 21.0 ppb (20) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 29.0
 
Oct. 13, 2021, 4 p.m. 29.0 ppb (28) 10.4 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 28.0
 
Oct. 13, 2021, 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
 
Oct. 13, 2021, 2 p.m. 25.1 ppb (24) 7.8 ppb (8) N/A 17.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 24.0
 
Oct. 13, 2021, 1 p.m. 23.5 ppb (23) 7.1 ppb (7) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 23.0
 
Oct. 13, 2021, noon 26.9 ppb (26) 7.5 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 26.0
 
Oct. 13, 2021, 11 a.m. 23.7 ppb (23) 6.9 ppb (7) N/A 17.0 ppb (17) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 23.0
 
Oct. 13, 2021, 10 a.m. 17.3 ppb (17) 4.1 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 17.0
 
Oct. 13, 2021, 9 a.m. 14.2 ppb (14) 3.3 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 14.0
 
Oct. 13, 2021, 8 a.m. 8.5 ppb (9) 1.3 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 9.0
 
Oct. 13, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.0
Oct. 13, 2021, 6 a.m. 6.6 ppb (7) 0.7 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
 
Oct. 13, 2021, 5 a.m. 5.1 ppb (5) 0.5 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 5.0
 
Oct. 13, 2021, 4 a.m. 5.9 ppb (6) 0.5 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
 
Oct. 13, 2021, 3 a.m. 8.2 ppb (8) 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) 8.0
 
Oct. 13, 2021, 2 a.m. 6.4 ppb (7) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Oct. 13, 2021, 1 a.m. 9.8 ppb (10) 1.8 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 10.0
 
Oct. 13, 2021, midnight 11.3 ppb (11) 2.3 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 11.0
 
Oct. 12, 2021, 11 p.m. 13.5 ppb (13) 2.6 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 12, 2021, 10 p.m. 15.3 ppb (15) 2.9 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 12, 2021, 9 p.m. 14.4 ppb (14) 2.2 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A N/A 14.0
 
Oct. 12, 2021, 8 p.m. 19.3 ppb (19) 4.1 ppb (4) N/A 15.0 ppb (15) N/A N/A N/A N/A N/A N/A 19.0
 
Oct. 12, 2021, 7 p.m. 17.4 ppb (17) 5.7 ppb (6) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A N/A 17.0
 
Oct. 12, 2021, 6 p.m. 13.2 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 13.0
 
Oct. 12, 2021, 5 p.m. 13.3 ppb (13) 3.3 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 13.0
 
Oct. 12, 2021, 4 p.m. 16.1 ppb (16) 5.3 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 16.0
 
Oct. 12, 2021, 3 p.m. 13.5 ppb (13) 4.3 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 13.0
 
Oct. 12, 2021, 2 p.m. 13.4 ppb (13) 4.2 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 13.0
 
Oct. 12, 2021, 1 p.m. 16.6 ppb (16) 6.1 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 16.0
 
Oct. 12, 2021, noon 15.3 ppb (15) 4.7 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 15.0
 
Oct. 12, 2021, 11 a.m. 15.7 ppb (15) 4.9 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 15.0
 
Oct. 12, 2021, 10 a.m. 12.8 ppb (13) 2.8 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 13.0
 
Oct. 12, 2021, 9 a.m. 6.4 ppb (7) 0.3 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 7.0
 
Oct. 12, 2021, 8 a.m. 2.8 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 3.0
 
Oct. 12, 2021, 7 a.m. 5.7 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 12, 2021, 6 a.m. 6.7 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 12, 2021, 5 a.m. 9.3 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 12, 2021, 4 a.m. 12.2 ppb (12) 1.9 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 12.0
 
Oct. 12, 2021, 3 a.m. 14.1 ppb (14) 2.1 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 14.0
 
Oct. 12, 2021, 2 a.m. 13.7 ppb (13) 2.6 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 13.0
 
Oct. 12, 2021, 1 a.m. 14.3 ppb (14) 1.6 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 14.0
 
Oct. 12, 2021, midnight 13.5 ppb (13) 1.1 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 13.0
 
Oct. 11, 2021, 11 p.m. 9.2 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 9.0
 
Oct. 11, 2021, 10 p.m. 12.2 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 12.0
 
Oct. 11, 2021, 9 p.m. 10.8 ppb (11) 2.5 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 11.0
 
Oct. 11, 2021, 8 p.m. 10.0 ppb (10) 2.5 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 10.0
 
Oct. 11, 2021, 7 p.m. 12.5 ppb (12) 4.1 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 12.0
 
Oct. 11, 2021, 6 p.m. 14.9 ppb (15) 5.5 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 15.0
 
Oct. 11, 2021, 5 p.m. 9.5 ppb (9) 3.4 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 9.0
 
Oct. 11, 2021, 4 p.m. 10.7 ppb (11) 4.4 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 11.0
 
Oct. 11, 2021, 3 p.m. 9.8 ppb (10) 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 10.0
 
Oct. 11, 2021, 2 p.m. 10.2 ppb (10) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 10.0
 
Oct. 11, 2021, 1 p.m. 13.7 ppb (13) 5.3 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, noon 11.4 ppb (11) 3.9 ppb (4) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 11, 2021, 11 a.m. 11.1 ppb (11) 3.4 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 11.0
 
Oct. 11, 2021, 10 a.m. 7.5 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -3.0 μg/m3 (0) 8.0
 
Oct. 11, 2021, 9 a.m. 3.2 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A -3.0 μg/m3 (0) 4.0
 
Oct. 11, 2021, 8 a.m. 4.2 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 4.0
 
Oct. 11, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Oct. 11, 2021, 6 a.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 11, 2021, 5 a.m. 4.3 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 11, 2021, 4 a.m. 4.8 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 5.0
 
Oct. 11, 2021, 3 a.m. 5.5 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 6.0
 
Oct. 11, 2021, 2 a.m. 5.9 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 6.0
 
Oct. 11, 2021, 1 a.m. 6.5 ppb (7) 1.6 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Oct. 11, 2021, midnight 8.5 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 11 p.m. 6.9 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 10 p.m. 7.8 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 9 p.m. 7.5 ppb (8) 2.6 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
 
Oct. 10, 2021, 8 p.m. 6.0 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 (0) 6.0
 
Oct. 10, 2021, 7 p.m. 7.0 ppb (7) 2.6 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Oct. 10, 2021, 6 p.m. 7.1 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Oct. 10, 2021, 5 p.m. 5.2 ppb (5) 2.2 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 5.0
 
Oct. 10, 2021, 4 p.m. 4.5 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Oct. 10, 2021, 3 p.m. 5.6 ppb (6) 2.5 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 6.0
 
Oct. 10, 2021, 2 p.m. 5.6 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 6.0
 
Oct. 10, 2021, 1 p.m. 5.6 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 6.0
 
Oct. 10, 2021, noon 5.3 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Oct. 10, 2021, 11 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Oct. 10, 2021, 10 a.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 1.0 μg/m3 (5) 5.0
 
Oct. 10, 2021, 9 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 8 a.m. 3.5 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 4.0
 
Oct. 10, 2021, 7 a.m. 4.4 ppb (5) 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) 5.0
 
Oct. 10, 2021, 6 a.m. 4.5 ppb (5) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 10, 2021, 5 a.m. 5.8 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 6.0
 
Oct. 10, 2021, 4 a.m. 5.6 ppb (6) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 3 a.m. 6.8 ppb (7) 1.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 10, 2021, 2 a.m. 8.7 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 9.0
 
Oct. 10, 2021, 1 a.m. 10.0 ppb (10) 2.8 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 10, 2021, midnight 8.9 ppb (9) 2.7 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
 
Oct. 9, 2021, 11 p.m. 11.3 ppb (11) 3.3 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 9, 2021, 10 p.m. 11.2 ppb (11) 3.9 ppb (4) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 9, 2021, 9 p.m. 8.0 ppb (8) 2.5 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 9, 2021, 8 p.m. 8.1 ppb (8) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 8.0
 
Oct. 9, 2021, 7 p.m. 7.5 ppb (8) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 8.0
 
Oct. 9, 2021, 6 p.m. 5.9 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 9, 2021, 5 p.m. 6.0 ppb (6) 2.1 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
 
Oct. 9, 2021, 4 p.m. 5.7 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
Oct. 9, 2021, 3 p.m. 7.2 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 9, 2021, 2 p.m. 6.8 ppb (7) 2.4 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 9, 2021, 1 p.m. 6.4 ppb (7) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Oct. 9, 2021, noon 8.6 ppb (9) 2.3 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 9, 2021, 11 a.m. 9.6 ppb (10) 2.5 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 9, 2021, 10 a.m. 9.5 ppb (9) 2.5 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 9.0
 
Oct. 9, 2021, 9 a.m. 7.1 ppb (7) 1.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 7.0
 
Oct. 9, 2021, 8 a.m. 7.0 ppb (7) 1.0 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
 
Oct. 9, 2021, 7 a.m. 6.4 ppb (7) 1.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 7.0
 
Oct. 9, 2021, 6 a.m. 8.8 ppb (9) 1.4 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 9, 2021, 5 a.m. 10.2 ppb (10) 1.3 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Oct. 9, 2021, 4 a.m. 11.2 ppb (11) 1.5 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 9, 2021, 3 a.m. 12.2 ppb (12) 1.7 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 9, 2021, 2 a.m. 21.6 ppb (21) 2.0 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 21.0
 
Oct. 9, 2021, 1 a.m. 20.4 ppb (20) 2.2 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 20.0
 
Oct. 9, 2021, midnight 22.7 ppb (22) 2.4 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 22.0
 
Oct. 8, 2021, 11 p.m. 13.8 ppb (14) 1.8 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 14.0
 
Oct. 8, 2021, 10 p.m. 19.5 ppb (19) 2.3 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 19.0
 
Oct. 8, 2021, 9 p.m. 19.0 ppb (18) 3.7 ppb (4) N/A 15.0 ppb (15) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 18.0
 
Oct. 8, 2021, 8 p.m. 12.5 ppb (12) 2.6 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 12.0
 
Oct. 8, 2021, 7 p.m. 14.3 ppb (14) 3.3 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 14.0
 
Oct. 8, 2021, 6 p.m. 10.2 ppb (10) 2.7 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 10.0
 
Oct. 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Oct. 8, 2021, 4 p.m. 12.3 ppb (12) 3.5 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 12.0
 
Oct. 8, 2021, 3 p.m. 15.8 ppb (15) 5.4 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 15.0
 
Oct. 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 0.0
Oct. 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.0
Oct. 8, 2021, noon 49.4 ppb (47) 25.9 ppb (25) N/A 23.0 ppb (22) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 47.0
 
Oct. 8, 2021, 11 a.m. 45.1 ppb (43) 23.6 ppb (23) N/A 22.0 ppb (21) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 43.0
 
Oct. 8, 2021, 10 a.m. 29.1 ppb (28) 7.9 ppb (8) N/A 21.0 ppb (20) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
Oct. 8, 2021, 9 a.m. 26.4 ppb (25) 5.7 ppb (6) N/A 21.0 ppb (20) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
Oct. 8, 2021, 8 a.m. 19.9 ppb (19) 3.4 ppb (4) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Oct. 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
Oct. 8, 2021, 6 a.m. 17.0 ppb (17) 0.8 ppb (1) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
Oct. 8, 2021, 5 a.m. 17.5 ppb (17) 1.5 ppb (2) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 17.0
 
Oct. 8, 2021, 4 a.m. 15.6 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 15.0
 
Oct. 8, 2021, 3 a.m. 19.3 ppb (19) 3.7 ppb (4) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Oct. 8, 2021, 2 a.m. 13.9 ppb (14) 1.8 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
Oct. 8, 2021, 1 a.m. 15.7 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
Oct. 8, 2021, midnight 21.8 ppb (21) 1.8 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
Oct. 7, 2021, 11 p.m. 16.6 ppb (16) 2.2 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
Oct. 7, 2021, 10 p.m. 16.6 ppb (16) 2.6 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 16.0
 
Oct. 7, 2021, 9 p.m. 11.7 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 12.0
 
Oct. 7, 2021, 8 p.m. 11.5 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Oct. 7, 2021, 7 p.m. 10.6 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 10.0
 
Oct. 7, 2021, 6 p.m. 13.1 ppb (13) 3.9 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 13.0
 
Oct. 7, 2021, 5 p.m. 11.6 ppb (11) 3.4 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A N/A N/A N/A 11.0