ID: 645

AQSQID: 380650002

Site Name: Hannover

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

Updated: Sept. 22, 2021, 10:07 a.m.

Location: Stanton (N Dakota Hwy 31), ND

Reporting: True, Located: True

Current AQI: 29.0

Stanton (N Dakota Hwy 31) ND, US: 47.1858, -101.4281

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 15, 2021, 7 a.m. 3.6 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 8.0 μg/m3 (34) 34.0
 
Sept. 15, 2021, 6 a.m. 3.8 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 7.5 μg/m3 (32) 32.0
 
Sept. 15, 2021, 5 a.m. 4.2 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 6.3 μg/m3 (27) 34.0
 
Sept. 15, 2021, 4 a.m. 6.2 ppb (6) 0.3 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 7.1 μg/m3 (30) 34.0
 
Sept. 15, 2021, 3 a.m. 2.4 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 6.3 μg/m3 (27) 40.0
 
Sept. 15, 2021, 2 a.m. 1.9 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 5.6 μg/m3 (24) 44.0
 
Sept. 15, 2021, 1 a.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 7.3 μg/m3 (31) 45.0
 
Sept. 15, 2021, midnight 1.6 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 7.2 μg/m3 (31) 44.0
 
Sept. 14, 2021, 11 p.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 49.0 ppb (46) N/A N/A 5.2 μg/m3 (22) 46.0
 
Sept. 14, 2021, 10 p.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 49.0 ppb (46) N/A N/A 5.3 μg/m3 (23) 46.0
 
Sept. 14, 2021, 9 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 48.0 ppb (45) N/A N/A 4.7 μg/m3 (20) 45.0
 
Sept. 14, 2021, 8 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 47.0 ppb (44) N/A N/A 4.8 μg/m3 (20) 44.0
 
Sept. 14, 2021, 7 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 46.0 ppb (43) N/A N/A 4.6 μg/m3 (20) 43.0
 
Sept. 14, 2021, 6 p.m. 1.5 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 4.7 μg/m3 (20) 40.0
 
Sept. 14, 2021, 5 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.4 μg/m3 (23) 23.0
 
Sept. 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 26.0
 
Sept. 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 7.6 μg/m3 (32) 32.0
 
Sept. 14, 2021, noon 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 8.6 μg/m3 (36) 36.0
 
Sept. 14, 2021, 11 a.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 6.3 μg/m3 (27) 27.0
 
Sept. 14, 2021, 10 a.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 6.5 μg/m3 (28) 28.0
 
Sept. 14, 2021, 9 a.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 6.2 μg/m3 (26) 29.0
 
Sept. 14, 2021, 8 a.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
Sept. 14, 2021, 7 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 5.9 μg/m3 (25) 28.0
 
Sept. 14, 2021, 6 a.m. 2.6 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
Sept. 14, 2021, 5 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 6.3 μg/m3 (27) 30.0
 
Sept. 14, 2021, 4 a.m. 2.5 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 7.4 μg/m3 (31) 31.0
 
Sept. 14, 2021, 3 a.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 8.7 μg/m3 (37) 37.0
 
Sept. 14, 2021, 2 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, 1 a.m. 2.4 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 8.5 μg/m3 (36) 37.0
 
Sept. 14, 2021, midnight 3.6 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 8.6 μg/m3 (36) 36.0
 
Sept. 13, 2021, 11 p.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 8.5 μg/m3 (36) 37.0
 
Sept. 13, 2021, 10 p.m. 5.2 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 8.7 μg/m3 (37) 37.0
 
Sept. 13, 2021, 9 p.m. 2.9 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 8.6 μg/m3 (36) 39.0
 
Sept. 13, 2021, 8 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 8.2 μg/m3 (35) 37.0
 
Sept. 13, 2021, 7 p.m. 5.3 ppb (5) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 34.0 ppb (32) N/A N/A 9.5 μg/m3 (40) 40.0
 
Sept. 13, 2021, 6 p.m. 3.5 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 13, 2021, 5 p.m. 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 7.0 μg/m3 (30) 30.0
 
Sept. 13, 2021, 4 p.m. 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 6.9 μg/m3 (29) 29.0
 
Sept. 13, 2021, 3 p.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 6.3 μg/m3 (27) 27.0
 
Sept. 13, 2021, 2 p.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 7.3 μg/m3 (31) 31.0
 
Sept. 13, 2021, 1 p.m. 2.7 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 5.8 μg/m3 (25) 25.0
 
Sept. 13, 2021, noon 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.8 μg/m3 (25) 25.0
 
Sept. 13, 2021, 11 a.m. 3.7 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 5.5 μg/m3 (23) 24.0
 
Sept. 13, 2021, 10 a.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
Sept. 13, 2021, 9 a.m. 1.9 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
Sept. 13, 2021, 8 a.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
Sept. 13, 2021, 7 a.m. 1.8 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 6.0 μg/m3 (25) 26.0
 
Sept. 13, 2021, 6 a.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 6.6 μg/m3 (28) 28.0
 
Sept. 13, 2021, 5 a.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.1 μg/m3 (30) 30.0
 
Sept. 13, 2021, 4 a.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 7.5 μg/m3 (32) 32.0
 
Sept. 13, 2021, 3 a.m. 1.6 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.5 μg/m3 (32) 32.0
 
Sept. 13, 2021, 2 a.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 7.3 μg/m3 (31) 31.0
 
Sept. 13, 2021, 1 a.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 7.1 μg/m3 (30) 32.0
 
Sept. 13, 2021, midnight 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 7.1 μg/m3 (30) 34.0
 
Sept. 12, 2021, 11 p.m. 1.3 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 7.2 μg/m3 (31) 35.0
 
Sept. 12, 2021, 10 p.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 7.1 μg/m3 (30) 36.0
 
Sept. 12, 2021, 9 p.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 7.3 μg/m3 (31) 36.0
 
Sept. 12, 2021, 8 p.m. 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 7.5 μg/m3 (32) 36.0
 
Sept. 12, 2021, 7 p.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 7.1 μg/m3 (30) 35.0
 
Sept. 12, 2021, 6 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 6.6 μg/m3 (28) 35.0
 
Sept. 12, 2021, 5 p.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 6.2 μg/m3 (26) 35.0
 
Sept. 12, 2021, 4 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 6.3 μg/m3 (27) 34.0
 
Sept. 12, 2021, 3 p.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 5.6 μg/m3 (24) 35.0
 
Sept. 12, 2021, 2 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 5.1 μg/m3 (22) 28.0
 
Sept. 12, 2021, 1 p.m. 3.2 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 22.0 ppb (21) N/A N/A 5.4 μg/m3 (23) 23.0
 
Sept. 12, 2021, noon 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 4.9 μg/m3 (21) 21.0
 
Sept. 12, 2021, 11 a.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 4.9 μg/m3 (21) 21.0
 
Sept. 12, 2021, 10 a.m. 1.4 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 12, 2021, 9 a.m. 1.5 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 4.7 μg/m3 (20) 23.0
 
Sept. 12, 2021, 8 a.m. 1.3 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 4.6 μg/m3 (20) 25.0
 
Sept. 12, 2021, 7 a.m. 1.3 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
Sept. 12, 2021, 6 a.m. 1.3 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 4.1 μg/m3 (18) 28.0
 
Sept. 12, 2021, 5 a.m. 1.0 ppb (1) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 4.1 μg/m3 (18) 31.0
 
Sept. 12, 2021, 4 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 3.5 μg/m3 (15) 28.0
 
Sept. 12, 2021, 3 a.m. 1.1 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 3.4 μg/m3 (15) 31.0
 
Sept. 12, 2021, 2 a.m. 1.2 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 32.0
 
Sept. 12, 2021, 1 a.m. 5.5 ppb (6) 0.5 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
Sept. 12, 2021, midnight 1.3 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 6.1 μg/m3 (26) 29.0
 
Sept. 11, 2021, 11 p.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 7.8 μg/m3 (33) 33.0
 
Sept. 11, 2021, 10 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 6.9 μg/m3 (29) 29.0
 
Sept. 11, 2021, 9 p.m. 3.7 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 29.0 ppb (27) N/A N/A 6.7 μg/m3 (28) 28.0
 
Sept. 11, 2021, 8 p.m. 9.4 ppb (9) 2.3 ppb (3) N/A 7.0 ppb (7) N/A 3.0 ppb (5) 24.0 ppb (23) N/A N/A 6.7 μg/m3 (28) 28.0
 
Sept. 11, 2021, 7 p.m. 2.4 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 6.0 μg/m3 (25) 27.0
 
Sept. 11, 2021, 6 p.m. 1.2 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
Sept. 11, 2021, 5 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 6.3 μg/m3 (27) 27.0
 
Sept. 11, 2021, 4 p.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 6.3 μg/m3 (27) 27.0
 
Sept. 11, 2021, 3 p.m. 1.6 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 6.5 μg/m3 (28) 28.0
 
Sept. 11, 2021, 2 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 6.5 μg/m3 (28) 28.0
 
Sept. 11, 2021, 1 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 6.5 μg/m3 (28) 28.0
 
Sept. 11, 2021, noon 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 11, 2021, 11 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.9 μg/m3 (25) 25.0
 
Sept. 11, 2021, 10 a.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.6 μg/m3 (24) 25.0
 
Sept. 11, 2021, 9 a.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 5.5 μg/m3 (23) 27.0
 
Sept. 11, 2021, 8 a.m. 1.3 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 5.2 μg/m3 (22) 29.0
 
Sept. 11, 2021, 7 a.m. 1.5 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
Sept. 11, 2021, 6 a.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 6.9 μg/m3 (29) 32.0
 
Sept. 11, 2021, 5 a.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 7.7 μg/m3 (33) 34.0
 
Sept. 11, 2021, 4 a.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 10.2 μg/m3 (43) 43.0
 
Sept. 11, 2021, 3 a.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 13.1 μg/m3 (54) 54.0
 
Sept. 11, 2021, 2 a.m. 3.0 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 45.0 ppb (42) N/A N/A 41.2 μg/m3 (116) 116.0
 
Sept. 11, 2021, 1 a.m. 3.2 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 59.4 μg/m3 (154) 154.0
 
Sept. 11, 2021, midnight 2.6 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 66.1 μg/m3 (157) 157.0
 
Sept. 10, 2021, 11 p.m. 2.9 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 60.0 μg/m3 (154) 154.0
 
Sept. 10, 2021, 10 p.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 53.5 μg/m3 (146) 146.0
 
Sept. 10, 2021, 9 p.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 46.6 μg/m3 (129) 129.0
 
Sept. 10, 2021, 8 p.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 47.9 μg/m3 (132) 132.0
 
Sept. 10, 2021, 7 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 41.1 μg/m3 (115) 115.0
 
Sept. 10, 2021, 6 p.m. 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 35.6 μg/m3 (102) 102.0
 
Sept. 10, 2021, 5 p.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 32.4 μg/m3 (94) 94.0
 
Sept. 10, 2021, 4 p.m. 2.0 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 32.4 μg/m3 (94) 94.0
 
Sept. 10, 2021, 3 p.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 29.7 μg/m3 (89) 89.0
 
Sept. 10, 2021, 2 p.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 29.8 μg/m3 (89) 89.0
 
Sept. 10, 2021, 1 p.m. 1.9 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 29.5 μg/m3 (88) 88.0
 
Sept. 10, 2021, noon 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 30.8 μg/m3 (91) 91.0
 
Sept. 10, 2021, 11 a.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 32.4 μg/m3 (94) 94.0
 
Sept. 10, 2021, 10 a.m. 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 32.9 μg/m3 (95) 95.0
 
Sept. 10, 2021, 9 a.m. 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 32.7 μg/m3 (95) 95.0
 
Sept. 10, 2021, 8 a.m. 2.1 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 30.2 μg/m3 (90) 90.0
 
Sept. 10, 2021, 7 a.m. 1.8 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 30.6 μg/m3 (90) 90.0
 
Sept. 10, 2021, 6 a.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 34.8 μg/m3 (99) 99.0
 
Sept. 10, 2021, 5 a.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 22.3 μg/m3 (73) 73.0
 
Sept. 10, 2021, 4 a.m. 3.1 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 13.1 μg/m3 (54) 54.0
 
Sept. 10, 2021, 3 a.m. 3.2 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 12.7 μg/m3 (53) 53.0
 
Sept. 10, 2021, 2 a.m. 7.4 ppb (7) 0.3 ppb (1) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 16.4 μg/m3 (61) 61.0
 
Sept. 10, 2021, 1 a.m. 5.9 ppb (6) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 27.6 μg/m3 (84) 84.0
 
Sept. 10, 2021, midnight 1.9 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 29.0 μg/m3 (87) 87.0
 
Sept. 9, 2021, 11 p.m. 1.9 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 22.1 μg/m3 (73) 73.0
 
Sept. 9, 2021, 10 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 19.4 μg/m3 (67) 67.0
 
Sept. 9, 2021, 9 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 12.6 μg/m3 (53) 53.0
 
Sept. 9, 2021, 8 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 8.0 μg/m3 (34) 41.0
 
Sept. 9, 2021, 7 p.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 6.4 μg/m3 (27) 40.0
 
Sept. 9, 2021, 6 p.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 5.6 μg/m3 (24) 39.0
 
Sept. 9, 2021, 5 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 4.8 μg/m3 (20) 38.0
 
Sept. 9, 2021, 4 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 4.3 μg/m3 (18) 34.0
 
Sept. 9, 2021, 3 p.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 4.4 μg/m3 (19) 32.0
 
Sept. 9, 2021, 2 p.m. 4.0 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Sept. 9, 2021, 1 p.m. 6.4 ppb (7) 1.4 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 5.6 μg/m3 (24) 24.0
 
Sept. 9, 2021, noon 3.0 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 4.9 μg/m3 (21) 21.0
 
Sept. 9, 2021, 11 a.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 5.4 μg/m3 (23) 23.0
 
Sept. 9, 2021, 10 a.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 5.3 μg/m3 (23) 23.0
 
Sept. 9, 2021, 9 a.m. 3.8 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 5.7 μg/m3 (24) 24.0
 
Sept. 9, 2021, 8 a.m. 4.2 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 5.9 μg/m3 (25) 25.0
 
Sept. 9, 2021, 7 a.m. 5.4 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 5.5 μg/m3 (23) 23.0
 
Sept. 9, 2021, 6 a.m. 17.7 ppb (17) 1.0 ppb (1) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 6.6 μg/m3 (28) 28.0
 
Sept. 9, 2021, 5 a.m. 4.9 ppb (5) 0.4 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 5.9 μg/m3 (25) 26.0
 
Sept. 9, 2021, 4 a.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 4.6 μg/m3 (20) 31.0
 
Sept. 9, 2021, 3 a.m. 1.2 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.6 μg/m3 (16) 34.0
 
Sept. 9, 2021, 2 a.m. 1.1 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 4.1 μg/m3 (18) 36.0
 
Sept. 9, 2021, 1 a.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 5.8 μg/m3 (25) 38.0
 
Sept. 9, 2021, midnight 1.7 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 5.2 μg/m3 (22) 36.0
 
Sept. 8, 2021, 11 p.m. 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 3.9 μg/m3 (17) 37.0
 
Sept. 8, 2021, 10 p.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 3.8 μg/m3 (16) 36.0
 
Sept. 8, 2021, 9 p.m. 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 3.8 μg/m3 (16) 36.0
 
Sept. 8, 2021, 8 p.m. 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 35.0
 
Sept. 8, 2021, 7 p.m. 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.9 μg/m3 (17) 34.0
 
Sept. 8, 2021, 6 p.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 4.1 μg/m3 (18) 35.0
 
Sept. 8, 2021, 5 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 4.0 μg/m3 (17) 33.0
 
Sept. 8, 2021, 4 p.m. 3.4 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 5.1 μg/m3 (22) 31.0
 
Sept. 8, 2021, 3 p.m. 5.9 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 28.0 ppb (26) N/A N/A 6.0 μg/m3 (25) 26.0
 
Sept. 8, 2021, 2 p.m. 6.1 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 27.0 ppb (25) N/A N/A 5.9 μg/m3 (25) 25.0
 
Sept. 8, 2021, 1 p.m. 5.6 ppb (6) 1.3 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 5.3 μg/m3 (23) 25.0
 
Sept. 8, 2021, noon 4.6 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Sept. 8, 2021, 11 a.m. 3.6 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Sept. 8, 2021, 10 a.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 5.0 μg/m3 (21) 26.0
 
Sept. 8, 2021, 9 a.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 4.9 μg/m3 (21) 28.0
 
Sept. 8, 2021, 8 a.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 4.6 μg/m3 (20) 29.0