ID: 645

AQSQID: 380650002

Site Name: Hannover

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

Updated: April 21, 2021, 6:45 p.m.

Location: Stanton (N Dakota Hwy 31), ND

Reporting: True, Located: True

Current AQI: 42.0

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
April 21, 2021, 4 p.m. 2.8 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 45.0 ppb (42) N/A N/A 5.2 μg/m3 (22) 42.0
 
April 21, 2021, 3 p.m. 3.6 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
April 21, 2021, 2 p.m. 3.2 ppb (4) 2.0 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 4.5 μg/m3 (19) 35.0
 
April 21, 2021, 1 p.m. 2.9 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 4.4 μg/m3 (19) 34.0
 
April 21, 2021, noon 3.0 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 4.5 μg/m3 (19) 33.0
 
April 21, 2021, 11 a.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 33.0 ppb (31) N/A N/A 4.4 μg/m3 (19) 31.0
 
April 21, 2021, 10 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 4.5 μg/m3 (19) 29.0
 
April 21, 2021, 9 a.m. 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 4.7 μg/m3 (20) 28.0
 
April 21, 2021, 8 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 5.5 μg/m3 (23) 28.0
 
April 21, 2021, 7 a.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 6.4 μg/m3 (27) 29.0
 
April 21, 2021, 6 a.m. 3.4 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 6.8 μg/m3 (29) 29.0
 
April 21, 2021, 5 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 5.1 μg/m3 (22) 31.0
 
April 21, 2021, 4 a.m. 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 4.1 μg/m3 (18) 33.0
 
April 21, 2021, 3 a.m. 2.4 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
April 21, 2021, 2 a.m. 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 4.7 μg/m3 (20) 30.0
 
April 21, 2021, 1 a.m. 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 4.5 μg/m3 (19) 33.0
 
April 21, 2021, midnight 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 3.6 μg/m3 (16) 35.0
 
April 20, 2021, 11 p.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 2.7 μg/m3 (12) 37.0
 
April 20, 2021, 10 p.m. 2.5 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 2.3 μg/m3 (10) 37.0
 
April 20, 2021, 9 p.m. 2.4 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 2.1 μg/m3 (9) 37.0
 
April 20, 2021, 8 p.m. 2.3 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 2.2 μg/m3 (10) 38.0
 
April 20, 2021, 7 p.m. 2.5 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 1.8 μg/m3 (8) 38.0
 
April 20, 2021, 6 p.m. 2.6 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
April 20, 2021, 5 p.m. 2.4 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 2.3 μg/m3 (10) 36.0
 
April 20, 2021, 4 p.m. 2.6 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
April 20, 2021, 3 p.m. 2.9 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 3.6 μg/m3 (16) 32.0
 
April 20, 2021, 2 p.m. 3.0 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 5.7 μg/m3 (24) 28.0
 
April 20, 2021, 1 p.m. 3.9 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 6.2 μg/m3 (26) 29.0
 
April 20, 2021, noon 4.1 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 31.0 ppb (29) N/A N/A 6.7 μg/m3 (28) 29.0
 
April 20, 2021, 11 a.m. 3.7 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 6.3 μg/m3 (27) 31.0
 
April 20, 2021, 10 a.m. 3.0 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 5.6 μg/m3 (24) 33.0
 
April 20, 2021, 9 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 4.3 μg/m3 (18) 33.0
 
April 20, 2021, 8 a.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 36.0 ppb (34) N/A N/A 4.3 μg/m3 (18) 34.0
 
April 20, 2021, 7 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 5.5 μg/m3 (23) 31.0
 
April 20, 2021, 6 a.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 5.7 μg/m3 (24) 35.0
 
April 20, 2021, 5 a.m. 2.3 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 4.4 μg/m3 (19) 38.0
 
April 20, 2021, 4 a.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 41.0 ppb (38) N/A N/A 4.4 μg/m3 (19) 38.0
 
April 20, 2021, 3 a.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 42.0 ppb (39) N/A N/A 4.1 μg/m3 (18) 39.0
 
April 20, 2021, 2 a.m. 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 41.0 ppb (38) N/A N/A 5.9 μg/m3 (25) 38.0
 
April 20, 2021, 1 a.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 6.5 μg/m3 (28) 38.0
 
April 20, 2021, midnight 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 43.0 ppb (40) N/A N/A 6.2 μg/m3 (26) 40.0
 
April 19, 2021, 11 p.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 42.0 ppb (39) N/A N/A 5.4 μg/m3 (23) 39.0
 
April 19, 2021, 10 p.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 42.0 ppb (39) N/A N/A 5.1 μg/m3 (22) 39.0
 
April 19, 2021, 9 p.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 42.0 ppb (39) N/A N/A 5.1 μg/m3 (22) 39.0
 
April 19, 2021, 8 p.m. 2.3 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 42.0 ppb (39) N/A N/A 3.8 μg/m3 (16) 39.0
 
April 19, 2021, 7 p.m. 2.2 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 41.0 ppb (38) N/A N/A 3.2 μg/m3 (14) 38.0
 
April 19, 2021, 6 p.m. 2.2 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 41.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
April 19, 2021, 5 p.m. 2.2 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
April 19, 2021, 4 p.m. 2.3 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
April 19, 2021, 3 p.m. 2.3 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
April 19, 2021, 2 p.m. 2.4 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 2.8 μg/m3 (12) 36.0
 
April 19, 2021, 1 p.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 2.9 μg/m3 (13) 36.0
 
April 19, 2021, noon 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 3.0 μg/m3 (13) 34.0
 
April 19, 2021, 11 a.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 2.7 μg/m3 (12) 33.0
 
April 19, 2021, 10 a.m. 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 2.4 μg/m3 (10) 28.0
 
April 19, 2021, 9 a.m. 2.6 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 2.1 μg/m3 (9) 27.0
 
April 19, 2021, 8 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 2.0 μg/m3 (9) 29.0
 
April 19, 2021, 7 a.m. 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 2.2 μg/m3 (10) 31.0
 
April 19, 2021, 6 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 2.3 μg/m3 (10) 33.0
 
April 19, 2021, 5 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 2.8 μg/m3 (12) 34.0
 
April 19, 2021, 4 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 2.3 μg/m3 (10) 34.0
 
April 19, 2021, 3 a.m. 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 2.2 μg/m3 (10) 34.0
 
April 19, 2021, 2 a.m. 2.9 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 2.3 μg/m3 (10) 34.0
 
April 19, 2021, 1 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 2.1 μg/m3 (9) 35.0
 
April 19, 2021, midnight 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 2.2 μg/m3 (10) 36.0
 
April 18, 2021, 11 p.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
April 18, 2021, 10 p.m. 2.7 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 2.1 μg/m3 (9) 36.0
 
April 18, 2021, 9 p.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 2.5 μg/m3 (11) 35.0
 
April 18, 2021, 8 p.m. 2.7 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 2.6 μg/m3 (11) 35.0
 
April 18, 2021, 7 p.m. 2.9 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 2.9 μg/m3 (13) 34.0
 
April 18, 2021, 6 p.m. 2.8 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 2.6 μg/m3 (11) 32.0
 
April 18, 2021, 5 p.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 1.5 μg/m3 (7) 30.0
 
April 18, 2021, 4 p.m. 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 0.9 μg/m3 (4) 33.0
 
April 18, 2021, 3 p.m. 6.5 ppb (7) 2.6 ppb (3) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
April 18, 2021, 2 p.m. 3.7 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 4.4 μg/m3 (19) 28.0
 
April 18, 2021, 1 p.m. 3.3 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 4.4 μg/m3 (19) 26.0
 
April 18, 2021, noon 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 3.7 μg/m3 (16) 32.0
 
April 18, 2021, 11 a.m. 3.0 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 3.6 μg/m3 (16) 33.0
 
April 18, 2021, 10 a.m. 3.0 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 3.5 μg/m3 (15) 33.0
 
April 18, 2021, 9 a.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 3.8 μg/m3 (16) 34.0
 
April 18, 2021, 8 a.m. 3.1 ppb (3) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
April 18, 2021, 7 a.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 3.7 μg/m3 (16) 34.0
 
April 18, 2021, 6 a.m. 3.3 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 40.0 ppb (38) N/A N/A 3.8 μg/m3 (16) 38.0
 
April 18, 2021, 5 a.m. 3.3 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 43.0 ppb (40) N/A N/A 3.9 μg/m3 (17) 40.0
 
April 18, 2021, 4 a.m. 3.6 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 44.0 ppb (41) N/A N/A 3.9 μg/m3 (17) 41.0
 
April 18, 2021, 3 a.m. 3.7 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 45.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
April 18, 2021, 2 a.m. 4.0 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 47.0 ppb (44) N/A N/A 4.3 μg/m3 (18) 44.0
 
April 18, 2021, 1 a.m. 3.8 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 4.0 ppb (6) 46.0 ppb (43) N/A N/A 3.9 μg/m3 (17) 43.0
 
April 18, 2021, midnight 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 49.0 ppb (46) N/A N/A 3.8 μg/m3 (16) 46.0
 
April 17, 2021, 11 p.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 50.0 ppb (47) N/A N/A 3.7 μg/m3 (16) 47.0
 
April 17, 2021, 10 p.m. 3.5 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 51.0 ppb (48) N/A N/A 3.9 μg/m3 (17) 48.0
 
April 17, 2021, 9 p.m. 3.8 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 52.0 ppb (49) N/A N/A 4.2 μg/m3 (18) 49.0
 
April 17, 2021, 8 p.m. 3.9 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 50.0 ppb (47) N/A N/A 3.9 μg/m3 (17) 47.0
 
April 17, 2021, 7 p.m. 4.3 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 48.0 ppb (45) N/A N/A 4.1 μg/m3 (18) 45.0
 
April 17, 2021, 6 p.m. 6.2 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A 5.0 ppb (8) 46.0 ppb (43) N/A N/A 6.7 μg/m3 (28) 43.0
 
April 17, 2021, 5 p.m. 7.6 ppb (8) 2.7 ppb (3) N/A 5.0 ppb (5) N/A 7.0 ppb (10) 43.0 ppb (40) N/A N/A 6.7 μg/m3 (28) 40.0
 
April 17, 2021, 4 p.m. 5.8 ppb (6) 2.3 ppb (3) N/A 4.0 ppb (4) N/A 6.0 ppb (9) 42.0 ppb (39) N/A N/A 5.8 μg/m3 (25) 39.0
 
April 17, 2021, 3 p.m. 4.7 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 6.8 μg/m3 (29) 33.0
 
April 17, 2021, 2 p.m. 4.9 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 17, 2021, 1 p.m. 4.5 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 7.4 μg/m3 (31) 31.0
 
April 17, 2021, noon 4.6 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 7.3 μg/m3 (31) 31.0
 
April 17, 2021, 11 a.m. 4.3 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 17, 2021, 10 a.m. 4.2 ppb (4) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 6.8 μg/m3 (29) 29.0
 
April 17, 2021, 9 a.m. 4.3 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 7.3 μg/m3 (31) 31.0
 
April 17, 2021, 8 a.m. 4.2 ppb (4) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 17, 2021, 7 a.m. 4.1 ppb (4) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 17, 2021, 6 a.m. 3.6 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 17, 2021, 5 a.m. 3.7 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 8.3 μg/m3 (35) 35.0
 
April 17, 2021, 4 a.m. 3.4 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 6.4 μg/m3 (27) 30.0
 
April 17, 2021, 3 a.m. 3.2 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 6.3 μg/m3 (27) 30.0
 
April 17, 2021, 2 a.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 6.4 μg/m3 (27) 30.0
 
April 17, 2021, 1 a.m. 3.2 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 6.4 μg/m3 (27) 29.0
 
April 17, 2021, midnight 3.1 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 6.1 μg/m3 (26) 29.0
 
April 16, 2021, 11 p.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 16, 2021, 10 p.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 4.3 μg/m3 (18) 29.0
 
April 16, 2021, 9 p.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 4.9 μg/m3 (21) 29.0
 
April 16, 2021, 8 p.m. 3.4 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 5.9 μg/m3 (25) 28.0
 
April 16, 2021, 7 p.m. 3.3 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 5.6 μg/m3 (24) 28.0
 
April 16, 2021, 6 p.m. 3.4 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 4.8 μg/m3 (20) 27.0
 
April 16, 2021, 5 p.m. 3.5 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 5.4 μg/m3 (23) 28.0
 
April 16, 2021, 4 p.m. 3.8 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 6.8 μg/m3 (29) 29.0
 
April 16, 2021, 3 p.m. 4.0 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 9.4 μg/m3 (40) 40.0
 
April 16, 2021, 2 p.m. 4.5 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 10.1 μg/m3 (43) 43.0
 
April 16, 2021, 1 p.m. 5.0 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 25.0 ppb (24) N/A N/A 11.5 μg/m3 (48) 48.0
 
April 16, 2021, noon 5.5 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 26.0 ppb (25) N/A N/A 15.2 μg/m3 (58) 58.0
 
April 16, 2021, 11 a.m. 6.1 ppb (6) 1.6 ppb (2) N/A 5.0 ppb (5) N/A 4.0 ppb (6) 23.0 ppb (22) N/A N/A 19.8 μg/m3 (68) 68.0
 
April 16, 2021, 10 a.m. 5.9 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 23.0 ppb (22) N/A N/A 18.7 μg/m3 (65) 65.0
 
April 16, 2021, 9 a.m. 5.6 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 26.0 ppb (25) N/A N/A 18.0 μg/m3 (64) 64.0
 
April 16, 2021, 8 a.m. 5.4 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 28.0 ppb (26) N/A N/A 16.2 μg/m3 (60) 60.0
 
April 16, 2021, 7 a.m. 5.5 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 29.0 ppb (27) N/A N/A 14.1 μg/m3 (56) 56.0
 
April 16, 2021, 6 a.m. 5.3 ppb (5) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 28.0 ppb (26) N/A N/A 13.8 μg/m3 (55) 55.0
 
April 16, 2021, 5 a.m. 5.3 ppb (5) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 30.0 ppb (28) N/A N/A 13.4 μg/m3 (54) 54.0
 
April 16, 2021, 4 a.m. 5.8 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 30.0 ppb (28) N/A N/A 14.6 μg/m3 (57) 57.0
 
April 16, 2021, 3 a.m. 6.0 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 30.0 ppb (28) N/A N/A 15.5 μg/m3 (59) 59.0
 
April 16, 2021, 2 a.m. 4.6 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 13.9 μg/m3 (55) 55.0
 
April 16, 2021, 1 a.m. 5.7 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 30.0 ppb (28) N/A N/A 13.8 μg/m3 (55) 55.0
 
April 16, 2021, midnight 6.1 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 5.0 ppb (8) 30.0 ppb (28) N/A N/A 14.1 μg/m3 (56) 56.0
 
April 15, 2021, 11 p.m. 5.9 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 5.0 ppb (8) 31.0 ppb (29) N/A N/A 12.5 μg/m3 (52) 52.0
 
April 15, 2021, 10 p.m. 5.1 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 4.0 ppb (6) 30.0 ppb (28) N/A N/A 15.1 μg/m3 (58) 58.0
 
April 15, 2021, 9 p.m. 4.7 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A 4.0 ppb (6) 32.0 ppb (30) N/A N/A 7.4 μg/m3 (31) 31.0
 
April 15, 2021, 8 p.m. 3.2 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 5.6 μg/m3 (24) 32.0
 
April 15, 2021, 7 p.m. 3.2 ppb (4) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 6.1 μg/m3 (26) 31.0
 
April 15, 2021, 6 p.m. 3.1 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 6.4 μg/m3 (27) 31.0
 
April 15, 2021, 5 p.m. 3.1 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 8.8 μg/m3 (37) 37.0
 
April 15, 2021, 4 p.m. 3.4 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 15, 2021, 3 p.m. 3.6 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 17.1 μg/m3 (62) 62.0
 
April 15, 2021, 2 p.m. 3.5 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 14.3 μg/m3 (56) 56.0
 
April 15, 2021, 1 p.m. 2.8 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 10.1 μg/m3 (43) 43.0
 
April 15, 2021, noon 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 9.6 μg/m3 (40) 40.0
 
April 15, 2021, 11 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 10.9 μg/m3 (46) 46.0
 
April 15, 2021, 10 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 9.3 μg/m3 (39) 39.0
 
April 15, 2021, 9 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 7.8 μg/m3 (33) 33.0
 
April 15, 2021, 8 a.m. 2.7 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 15, 2021, 7 a.m. 2.6 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 6.9 μg/m3 (29) 32.0
 
April 15, 2021, 6 a.m. 2.6 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 6.4 μg/m3 (27) 30.0
 
April 15, 2021, 5 a.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 7.2 μg/m3 (31) 31.0
 
April 15, 2021, 4 a.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 6.5 μg/m3 (28) 29.0
 
April 15, 2021, 3 a.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 5.4 μg/m3 (23) 30.0
 
April 15, 2021, 2 a.m. 2.4 ppb (3) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 4.0 μg/m3 (17) 31.0
 
April 15, 2021, 1 a.m. 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 3.8 μg/m3 (16) 31.0
 
April 15, 2021, midnight 2.4 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 3.6 μg/m3 (16) 31.0
 
April 14, 2021, 11 p.m. 2.3 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 3.4 μg/m3 (15) 31.0
 
April 14, 2021, 10 p.m. 2.3 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 3.2 μg/m3 (14) 32.0
 
April 14, 2021, 9 p.m. 2.4 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 3.8 μg/m3 (16) 33.0
 
April 14, 2021, 8 p.m. 2.3 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 3.4 μg/m3 (15) 33.0
 
April 14, 2021, 7 p.m. 2.2 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 3.2 μg/m3 (14) 34.0
 
April 14, 2021, 6 p.m. 2.3 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 3.1 μg/m3 (13) 34.0
 
April 14, 2021, 5 p.m. 2.2 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 3.2 μg/m3 (14) 35.0