ID: 720

AQSQID: 420770004

Site Name: Allentown

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

Updated: April 11, 2021, 3:43 a.m.

Location: Allentown (S Maxwell St), PA

Reporting: True, Located: True

Current AQI: 65.0

Allentown (S Maxwell St) PA, US: 40.6119, -75.4325

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 11, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 18.5 μg/m3 (65) 65.0
 
April 11, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 13.3 μg/m3 (54) 54.0
 
April 11, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 12.7 μg/m3 (53) 53.0
 
April 10, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 10, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 10.1 μg/m3 (43) 43.0
 
April 10, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 8.9 μg/m3 (38) 38.0
 
April 10, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 8.6 μg/m3 (36) 38.0
 
April 10, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 8.5 μg/m3 (36) 36.0
 
April 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 7.4 μg/m3 (31) 36.0
 
April 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
April 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 5.6 μg/m3 (24) 30.0
 
April 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.0 μg/m3 (25) 27.0
 
April 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 7.4 μg/m3 (31) 31.0
 
April 10, 2021, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 7.2 μg/m3 (31) 31.0
 
April 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 8.1 μg/m3 (34) 34.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 9.8 μg/m3 (41) 41.0
 
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 8.7 μg/m3 (37) 37.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 7.2 μg/m3 (31) 31.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
April 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 5.8 μg/m3 (25) 25.0
 
April 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 5.3 μg/m3 (23) 25.0
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 4.9 μg/m3 (21) 25.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 4.7 μg/m3 (20) 27.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 5.5 μg/m3 (23) 26.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 4.8 μg/m3 (20) 26.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 4.2 μg/m3 (18) 25.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 4.0 μg/m3 (17) 26.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.8 μg/m3 (16) 27.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.9 μg/m3 (17) 27.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.6 μg/m3 (16) 27.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.6 μg/m3 (16) 26.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 4.5 μg/m3 (19) 19.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 4.2 μg/m3 (18) 18.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 3.7 μg/m3 (16) 16.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 3.6 μg/m3 (16) 21.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.6 μg/m3 (16) 22.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.5 μg/m3 (15) 22.0
 
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.9 μg/m3 (13) 13.0
 
April 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
April 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.5 μg/m3 (11) 26.0
 
April 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.8 μg/m3 (12) 30.0
 
April 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 2.5 μg/m3 (11) 29.0
 
April 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.8 μg/m3 (12) 30.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.4 μg/m3 (15) 33.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.5 μg/m3 (19) 39.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.2 μg/m3 (22) 46.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 5.3 μg/m3 (23) 49.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 5.1 μg/m3 (22) 49.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 4.9 μg/m3 (21) 45.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.9 μg/m3 (21) 43.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.1 μg/m3 (18) 40.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 11.8 μg/m3 (50) 50.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 5.8 μg/m3 (25) 25.0
 
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 4.5 μg/m3 (19) 23.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 4.2 μg/m3 (18) 28.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 4.3 μg/m3 (18) 27.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.1 μg/m3 (22) 22.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.1 μg/m3 (26) 27.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 10.3 μg/m3 (43) 43.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 10.7 μg/m3 (45) 45.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 10.8 μg/m3 (46) 46.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 10.3 μg/m3 (43) 43.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 9.7 μg/m3 (41) 44.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 9.7 μg/m3 (41) 47.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 10.0 μg/m3 (42) 48.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 9.8 μg/m3 (41) 45.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 9.1 μg/m3 (38) 46.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 8.6 μg/m3 (36) 44.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A N/A 43.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A N/A 43.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.2 μg/m3 (26) 32.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 6.2 μg/m3 (26) 26.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 6.9 μg/m3 (29) 29.0
 
March 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.1 μg/m3 (26) 27.0
 
March 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 5.8 μg/m3 (25) 26.0
 
March 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 5.6 μg/m3 (24) 25.0
 
March 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 5.4 μg/m3 (23) 26.0
 
March 16, 2021, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 5.6 μg/m3 (24) 28.0
 
March 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 5.8 μg/m3 (25) 25.0
 
March 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 5.9 μg/m3 (25) 25.0
 
March 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 6.1 μg/m3 (26) 26.0
 
March 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 5.7 μg/m3 (24) 24.0
 
March 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.8 μg/m3 (25) 25.0
 
March 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 6.2 μg/m3 (26) 26.0
 
March 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.6 μg/m3 (24) 27.0
 
March 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 5.8 μg/m3 (25) 28.0
 
March 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 5.4 μg/m3 (23) 28.0
 
March 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.5 μg/m3 (23) 29.0
 
March 16, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
March 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.3 μg/m3 (23) 34.0
 
March 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.9 μg/m3 (21) 37.0
 
March 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 7.3 μg/m3 (31) 38.0
 
March 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 6.8 μg/m3 (29) 38.0
 
March 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.4 μg/m3 (23) 38.0
 
March 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 7.4 μg/m3 (31) 36.0
 
March 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.9 μg/m3 (25) 36.0
 
March 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.9 μg/m3 (21) 35.0
 
March 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 5.3 μg/m3 (23) 33.0
 
March 15, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.1 μg/m3 (22) 29.0
 
March 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.3 μg/m3 (14) 32.0
 
March 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.7 μg/m3 (12) 34.0
 
March 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.5 μg/m3 (11) 35.0
 
March 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.5 μg/m3 (11) 35.0
 
March 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.6 μg/m3 (11) 11.0
 
March 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.7 μg/m3 (12) 36.0
 
March 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.1 μg/m3 (13) 37.0
 
March 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.3 μg/m3 (14) 37.0
 
March 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.6 μg/m3 (16) 37.0
 
March 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.3 μg/m3 (18) 37.0
 
March 15, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.4 μg/m3 (19) 37.0
 
March 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.3 μg/m3 (18) 37.0
 
March 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.2 μg/m3 (18) 38.0
 
March 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.5 μg/m3 (19) 38.0
 
March 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.5 μg/m3 (19) 39.0
 
March 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.7 μg/m3 (20) 39.0
 
March 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.9 μg/m3 (21) 39.0
 
March 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 4.8 μg/m3 (20) 38.0
 
March 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.1 μg/m3 (22) 38.0
 
March 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 6.4 μg/m3 (27) 37.0
 
March 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 7.7 μg/m3 (33) 35.0
 
March 14, 2021, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 7.3 μg/m3 (31) 32.0
 
March 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 7.0 μg/m3 (30) 32.0
 
March 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 6.5 μg/m3 (28) 34.0
 
March 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.1 μg/m3 (26) 36.0
 
March 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.6 μg/m3 (24) 37.0
 
March 14, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.1 μg/m3 (22) 37.0
 
March 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.9 μg/m3 (21) 21.0
 
March 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 5.7 μg/m3 (24) 32.0
 
March 14, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 6.1 μg/m3 (26) 33.0
 
March 14, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 14, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 9.4 μg/m3 (40) 40.0
 
March 14, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 7.2 μg/m3 (31) 34.0
 
March 14, 2021, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 5.8 μg/m3 (25) 28.0
 
March 13, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 13, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.0 μg/m3 (17) 39.0
 
March 13, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.7 μg/m3 (16) 40.0
 
March 13, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 3.9 μg/m3 (17) 40.0
 
March 13, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.7 μg/m3 (16) 38.0
 
March 13, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 3.4 μg/m3 (15) 38.0
 
March 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.1 μg/m3 (13) 36.0
 
March 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.1 μg/m3 (13) 35.0
 
March 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.0 μg/m3 (13) 34.0
 
March 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.9 μg/m3 (13) 34.0
 
March 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.8 μg/m3 (12) 33.0
 
March 13, 2021, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 2.5 μg/m3 (11) 33.0
 
March 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.5 μg/m3 (11) 34.0
 
March 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.8 μg/m3 (12) 35.0