ID: 645

AQSQID: 380650002

Site Name: Hannover

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

Updated: Jan. 24, 2021, 11:31 p.m.

Location: Stanton (N Dakota Hwy 31), ND

Reporting: True, Located: True

Current AQI: 25.0

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
Jan. 24, 2021, 9 p.m. 6.6 ppb (7) 2.2 ppb (3) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 27.0 ppb (25) N/A N/A 3.9 μg/m3 (17) 25.0
 
Jan. 24, 2021, 8 p.m. 8.5 ppb (9) 3.4 ppb (4) N/A 5.0 ppb (5) N/A 3.0 ppb (5) 28.0 ppb (26) N/A N/A 3.5 μg/m3 (15) 26.0
 
Jan. 24, 2021, 7 p.m. 8.5 ppb (9) 3.8 ppb (4) N/A 5.0 ppb (5) N/A 3.0 ppb (5) 27.0 ppb (25) N/A N/A 3.9 μg/m3 (17) 25.0
 
Jan. 24, 2021, 6 p.m. 4.5 ppb (5) 2.2 ppb (3) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
Jan. 24, 2021, 5 p.m. 4.4 ppb (5) 2.2 ppb (3) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 2.1 μg/m3 (9) 30.0
 
Jan. 24, 2021, 4 p.m. 2.1 ppb (2) 1.5 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
Jan. 24, 2021, 3 p.m. 1.9 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 2.1 μg/m3 (9) 30.0
 
Jan. 24, 2021, 2 p.m. 2.0 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 2.1 μg/m3 (9) 30.0
 
Jan. 24, 2021, 1 p.m. 2.0 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 1.8 μg/m3 (8) 31.0
 
Jan. 24, 2021, noon 2.0 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 2.2 μg/m3 (10) 30.0
 
Jan. 24, 2021, 11 a.m. 2.2 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 2.6 μg/m3 (11) 29.0
 
Jan. 24, 2021, 10 a.m. 1.8 ppb (2) 1.3 ppb (2) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 1.9 μg/m3 (8) 31.0
 
Jan. 24, 2021, 9 a.m. 1.7 ppb (2) 1.3 ppb (2) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
Jan. 24, 2021, 8 a.m. 1.6 ppb (2) 1.2 ppb (2) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0
 
Jan. 24, 2021, 7 a.m. 1.7 ppb (2) 1.3 ppb (2) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0
 
Jan. 24, 2021, 6 a.m. 1.7 ppb (2) 1.3 ppb (2) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
Jan. 24, 2021, 5 a.m. 1.8 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 2.9 μg/m3 (13) 30.0
 
Jan. 24, 2021, 4 a.m. 2.1 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 3.4 μg/m3 (15) 29.0
 
Jan. 24, 2021, 3 a.m. 2.5 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 5.8 μg/m3 (25) 27.0
 
Jan. 24, 2021, 2 a.m. 2.2 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 5.4 μg/m3 (23) 29.0
 
Jan. 24, 2021, 1 a.m. 2.3 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 5.9 μg/m3 (25) 30.0
 
Jan. 24, 2021, midnight 2.4 ppb (3) 1.2 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 5.1 μg/m3 (22) 32.0
 
Jan. 23, 2021, 11 p.m. 3.1 ppb (3) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.6 μg/m3 (32) 32.0
 
Jan. 23, 2021, 10 p.m. 3.6 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 8.8 μg/m3 (37) 37.0
 
Jan. 23, 2021, 9 p.m. 3.7 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 23, 2021, 8 p.m. 4.2 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 23, 2021, 7 p.m. 4.2 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 7.3 μg/m3 (31) 31.0
 
Jan. 23, 2021, 6 p.m. 4.3 ppb (5) 2.0 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 5.9 μg/m3 (25) 26.0
 
Jan. 23, 2021, 5 p.m. 3.2 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 4.1 μg/m3 (18) 28.0
 
Jan. 23, 2021, 4 p.m. 2.7 ppb (3) 1.4 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 3.7 μg/m3 (16) 27.0
 
Jan. 23, 2021, 3 p.m. 2.6 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 3.9 μg/m3 (17) 25.0
 
Jan. 23, 2021, 2 p.m. 2.8 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 4.6 μg/m3 (20) 24.0
 
Jan. 23, 2021, 1 p.m. 3.4 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 6.3 μg/m3 (27) 27.0
 
Jan. 23, 2021, noon 3.6 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 7.8 μg/m3 (33) 33.0
 
Jan. 23, 2021, 11 a.m. 3.9 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 22.0 ppb (21) N/A N/A 9.3 μg/m3 (39) 39.0
 
Jan. 23, 2021, 10 a.m. 4.1 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 23.0 ppb (22) N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 23, 2021, 9 a.m. 4.9 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 22.0 ppb (21) N/A N/A 10.5 μg/m3 (44) 44.0
 
Jan. 23, 2021, 8 a.m. 8.6 ppb (9) 1.3 ppb (2) N/A 7.0 ppb (7) N/A 2.0 ppb (3) 18.0 ppb (17) N/A N/A 13.5 μg/m3 (54) 54.0
 
Jan. 23, 2021, 7 a.m. 8.7 ppb (9) 1.2 ppb (2) N/A 8.0 ppb (8) N/A 2.0 ppb (3) 19.0 ppb (18) N/A N/A 14.4 μg/m3 (56) 56.0
 
Jan. 23, 2021, 6 a.m. 12.0 ppb (12) 1.2 ppb (2) N/A 11.0 ppb (11) N/A 2.0 ppb (3) 15.0 ppb (14) N/A N/A 15.3 μg/m3 (58) 58.0
 
Jan. 23, 2021, 5 a.m. 7.2 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A 2.0 ppb (3) 20.0 ppb (19) N/A N/A 15.4 μg/m3 (58) 58.0
 
Jan. 23, 2021, 4 a.m. 5.7 ppb (6) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 21.0 ppb (20) N/A N/A 16.0 μg/m3 (60) 60.0
 
Jan. 23, 2021, 3 a.m. 4.4 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 22.0 ppb (21) N/A N/A 16.3 μg/m3 (60) 60.0
 
Jan. 23, 2021, 2 a.m. 5.9 ppb (6) 1.2 ppb (2) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 20.0 ppb (19) N/A N/A 13.3 μg/m3 (54) 54.0
 
Jan. 23, 2021, 1 a.m. 4.4 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 23.0 ppb (22) N/A N/A 9.2 μg/m3 (39) 39.0
 
Jan. 23, 2021, midnight 4.3 ppb (5) 1.4 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 24.0 ppb (23) N/A N/A 8.2 μg/m3 (35) 35.0
 
Jan. 22, 2021, 11 p.m. 4.0 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 26.0 ppb (25) N/A N/A 5.8 μg/m3 (25) 25.0
 
Jan. 22, 2021, 10 p.m. 4.1 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 27.0 ppb (25) N/A N/A 9.4 μg/m3 (40) 40.0
 
Jan. 22, 2021, 9 p.m. 3.4 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 30.0 ppb (28) N/A N/A 6.7 μg/m3 (28) 28.0
 
Jan. 22, 2021, 8 p.m. 3.6 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 7.0 μg/m3 (30) 30.0
 
Jan. 22, 2021, 7 p.m. 4.1 ppb (4) 1.9 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
 
Jan. 22, 2021, 6 p.m. 4.1 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 29.0 ppb (27) N/A N/A 5.5 μg/m3 (23) 27.0
 
Jan. 22, 2021, 5 p.m. 3.3 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 29.0 ppb (27) N/A N/A 4.8 μg/m3 (20) 27.0
 
Jan. 22, 2021, 4 p.m. 2.4 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 4.3 μg/m3 (18) 27.0
 
Jan. 22, 2021, 3 p.m. 2.2 ppb (3) 1.2 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 4.8 μg/m3 (20) 26.0
 
Jan. 22, 2021, 2 p.m. 1.7 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 5.3 μg/m3 (23) 26.0
 
Jan. 22, 2021, 1 p.m. 2.7 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Jan. 22, 2021, noon 2.3 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 3.0 ppb (5) 27.0 ppb (25) N/A N/A 5.5 μg/m3 (23) 25.0
 
Jan. 22, 2021, 11 a.m. 1.5 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 4.9 μg/m3 (21) 27.0
 
Jan. 22, 2021, 10 a.m. 2.4 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 3.0 ppb (5) 27.0 ppb (25) N/A N/A 5.5 μg/m3 (23) 25.0
 
Jan. 22, 2021, 9 a.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 6.0 ppb (9) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Jan. 22, 2021, 8 a.m. 3.4 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 4.0 ppb (6) 26.0 ppb (25) N/A N/A 5.0 μg/m3 (21) 25.0
 
Jan. 22, 2021, 7 a.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 26.0 ppb (25) N/A N/A 4.5 μg/m3 (19) 25.0
 
Jan. 22, 2021, 6 a.m. 3.2 ppb (4) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 4.0 ppb (6) 24.0 ppb (23) N/A N/A 4.3 μg/m3 (18) 23.0
 
Jan. 22, 2021, 5 a.m. 1.2 ppb (2) 0.7 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 24.0 ppb (23) N/A N/A 3.9 μg/m3 (17) 23.0
 
Jan. 22, 2021, 4 a.m. 1.1 ppb (2) 0.6 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 24.0 ppb (23) N/A N/A 3.9 μg/m3 (17) 23.0
 
Jan. 22, 2021, 3 a.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 3.8 μg/m3 (16) 25.0
 
Jan. 22, 2021, 2 a.m. 1.1 ppb (2) 0.6 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 4.3 μg/m3 (18) 25.0
 
Jan. 22, 2021, 1 a.m. 1.0 ppb (1) 0.6 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 3.8 μg/m3 (16) 25.0
 
Jan. 22, 2021, midnight 1.1 ppb (2) 0.7 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 27.0 ppb (25) N/A N/A 3.5 μg/m3 (15) 25.0
 
Jan. 21, 2021, 6 p.m. 1.0 ppb (1) 0.7 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 2.2 μg/m3 (10) 25.0
 
Jan. 21, 2021, 5 p.m. 1.1 ppb (2) 0.7 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 2.6 μg/m3 (11) 26.0
 
Jan. 21, 2021, 4 p.m. 1.1 ppb (2) 0.7 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 3.1 μg/m3 (13) 26.0
 
Jan. 21, 2021, 3 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 3.6 μg/m3 (16) 27.0
 
Jan. 21, 2021, 2 p.m. 1.0 ppb (1) 0.5 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 3.7 μg/m3 (16) 29.0
 
Jan. 21, 2021, 1 p.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 3.8 μg/m3 (16) 30.0
 
Jan. 21, 2021, noon 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 2.8 μg/m3 (12) 30.0
 
Jan. 21, 2021, 11 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 2.1 μg/m3 (9) 29.0
 
Jan. 21, 2021, 10 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 1.1 μg/m3 (5) 30.0
 
Jan. 21, 2021, 9 a.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
Jan. 21, 2021, 8 a.m. 1.2 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 0.7 μg/m3 (3) 31.0
 
Jan. 21, 2021, 7 a.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 0.7 μg/m3 (3) 32.0
 
Jan. 21, 2021, 6 a.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 0.7 μg/m3 (3) 32.0
 
Jan. 21, 2021, 5 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 0.6 μg/m3 (3) 31.0
 
Jan. 21, 2021, 4 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 3.0 ppb (5) 32.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
Jan. 21, 2021, 3 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 32.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
Jan. 21, 2021, 2 a.m. 2.1 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 32.0 ppb (30) N/A N/A 0.6 μg/m3 (3) 30.0
 
Jan. 21, 2021, 1 a.m. 2.1 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 33.0 ppb (31) N/A N/A 0.8 μg/m3 (4) 31.0
 
Jan. 21, 2021, midnight 1.4 ppb (2) 0.5 ppb (1) 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
 
Jan. 20, 2021, 11 p.m. 1.4 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 0.9 μg/m3 (4) 34.0
 
Jan. 20, 2021, 10 p.m. 1.2 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 0.9 μg/m3 (4) 35.0
 
Jan. 20, 2021, 9 p.m. 1.1 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 0.9 μg/m3 (4) 35.0
 
Jan. 20, 2021, 8 p.m. 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 1.0 μg/m3 (5) 36.0
 
Jan. 20, 2021, 7 p.m. 1.2 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 1.0 μg/m3 (5) 36.0
 
Jan. 20, 2021, 6 p.m. 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 1.0 μg/m3 (5) 36.0
 
Jan. 20, 2021, 5 p.m. 1.2 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 1.1 μg/m3 (5) 37.0
 
Jan. 20, 2021, 4 p.m. 1.6 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
Jan. 20, 2021, 3 p.m. 2.1 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 2.1 μg/m3 (9) 33.0
 
Jan. 20, 2021, 2 p.m. 1.5 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 2.7 μg/m3 (12) 32.0
 
Jan. 20, 2021, 1 p.m. 1.1 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 3.1 μg/m3 (13) 30.0
 
Jan. 20, 2021, noon 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 1.9 μg/m3 (8) 29.0
 
Jan. 20, 2021, 11 a.m. 0.9 ppb (1) 0.4 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
Jan. 20, 2021, 10 a.m. 0.9 ppb (1) 0.4 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 0.5 μg/m3 (3) 31.0
 
Jan. 20, 2021, 9 a.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 0.5 μg/m3 (3) 30.0
 
Jan. 20, 2021, 8 a.m. 1.1 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 1.4 μg/m3 (6) 29.0
 
Jan. 20, 2021, 7 a.m. 1.2 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 1.1 μg/m3 (5) 29.0
 
Jan. 20, 2021, 6 a.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 0.6 μg/m3 (3) 29.0
 
Jan. 20, 2021, 5 a.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 0.7 μg/m3 (3) 29.0
 
Jan. 20, 2021, 4 a.m. 1.2 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 1.2 μg/m3 (5) 28.0
 
Jan. 20, 2021, 3 a.m. 1.4 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 2.4 μg/m3 (10) 28.0
 
Jan. 20, 2021, 2 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 4.4 μg/m3 (19) 27.0
 
Jan. 20, 2021, 1 a.m. 1.6 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 5.3 μg/m3 (23) 27.0
 
Jan. 20, 2021, midnight 2.6 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 5.9 μg/m3 (25) 26.0
 
Jan. 19, 2021, 11 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 5.7 μg/m3 (24) 29.0
 
Jan. 19, 2021, 10 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 5.1 μg/m3 (22) 30.0
 
Jan. 19, 2021, 9 p.m. 1.7 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 4.9 μg/m3 (21) 31.0
 
Jan. 19, 2021, 8 p.m. 2.8 ppb (3) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 33.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
Jan. 19, 2021, 7 p.m. 3.4 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 11.6 μg/m3 (49) 49.0
 
Jan. 19, 2021, 6 p.m. 2.2 ppb (3) 1.1 ppb (2) N/A 1.0 ppb (1) N/A 2.0 ppb (3) N/A N/A N/A 7.2 μg/m3 (31) 31.0
 
Jan. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 3.9 μg/m3 (17) 17.0
 
Jan. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.1 μg/m3 (13) 30.0
 
Jan. 19, 2021, 2 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 3.0 μg/m3 (13) 32.0
 
Jan. 19, 2021, 1 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 0.0 ppb (0) N/A 2.0 ppb (3) 34.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 32.0
 
Jan. 19, 2021, noon 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 3.3 μg/m3 (14) 31.0
 
Jan. 19, 2021, 11 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
Jan. 19, 2021, 10 a.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 5.1 μg/m3 (22) 30.0
 
Jan. 19, 2021, 9 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 5.6 μg/m3 (24) 29.0
 
Jan. 19, 2021, 8 a.m. 1.7 ppb (2) 0.4 ppb (1) 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
 
Jan. 19, 2021, 7 a.m. 1.6 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 3.3 μg/m3 (14) 29.0
 
Jan. 19, 2021, 6 a.m. 3.6 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 30.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
Jan. 19, 2021, 5 a.m. 2.9 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 31.0 ppb (29) N/A N/A 4.6 μg/m3 (20) 29.0
 
Jan. 19, 2021, 4 a.m. 2.0 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 32.0 ppb (30) N/A N/A 4.5 μg/m3 (19) 30.0
 
Jan. 19, 2021, 3 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 5.5 μg/m3 (23) 31.0
 
Jan. 19, 2021, 2 a.m. 2.4 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 7.5 μg/m3 (32) 32.0
 
Jan. 19, 2021, 1 a.m. 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.2 μg/m3 (31) 31.0
 
Jan. 19, 2021, midnight 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 18, 2021, 11 p.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2021, 10 p.m. 2.3 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 27.0 ppb (25) N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 18, 2021, 9 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 25.0 ppb (24) N/A N/A 7.3 μg/m3 (31) 31.0
 
Jan. 18, 2021, 8 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 18, 2021, 7 p.m. 1.6 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 7.9 μg/m3 (33) 33.0
 
Jan. 18, 2021, 6 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2021, 5 p.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 7.9 μg/m3 (33) 33.0
 
Jan. 18, 2021, 4 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 7.5 μg/m3 (32) 32.0
 
Jan. 18, 2021, 3 p.m. 3.7 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 23.0 ppb (22) N/A N/A 6.7 μg/m3 (28) 28.0
 
Jan. 18, 2021, 2 p.m. 3.3 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 6.1 μg/m3 (26) 26.0
 
Jan. 18, 2021, 1 p.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 5.2 μg/m3 (22) 22.0
 
Jan. 18, 2021, noon 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 4.3 μg/m3 (18) 22.0
 
Jan. 18, 2021, 11 a.m. 1.9 ppb (2) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 3.3 μg/m3 (14) 24.0
 
Jan. 18, 2021, 10 a.m. 3.2 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 19.0 ppb (18) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 18, 2021, 9 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 14.0 ppb (13) N/A N/A 6.8 μg/m3 (29) 29.0
 
Jan. 18, 2021, 8 a.m. 2.9 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 17.0 ppb (16) N/A N/A 6.7 μg/m3 (28) 28.0
 
Jan. 18, 2021, 7 a.m. 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 18.0 ppb (17) N/A N/A 6.5 μg/m3 (28) 28.0
 
Jan. 18, 2021, 6 a.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 20.0 ppb (19) N/A N/A 6.5 μg/m3 (28) 28.0
 
Jan. 18, 2021, 5 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 26.0 ppb (25) N/A N/A 4.6 μg/m3 (20) 25.0
 
Jan. 18, 2021, 4 a.m. 3.5 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 4.0 ppb (6) 27.0 ppb (25) N/A N/A 4.2 μg/m3 (18) 25.0
 
Jan. 18, 2021, 3 a.m. 3.2 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 27.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
Jan. 18, 2021, 2 a.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 26.0 ppb (25) N/A N/A 4.6 μg/m3 (20) 25.0
 
Jan. 18, 2021, 1 a.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 28.0 ppb (26) N/A N/A 3.8 μg/m3 (16) 26.0
 
Jan. 18, 2021, midnight 2.3 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
Jan. 17, 2021, 11 p.m. 3.0 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 3.4 μg/m3 (15) 29.0
 
Jan. 17, 2021, 10 p.m. 3.6 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 31.0 ppb (29) N/A N/A 3.6 μg/m3 (16) 29.0
 
Jan. 17, 2021, 9 p.m. 3.8 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (5) 32.0 ppb (30) N/A N/A 3.8 μg/m3 (16) 30.0
 
Jan. 17, 2021, 8 p.m. 2.8 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 33.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
Jan. 17, 2021, 7 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 3.4 μg/m3 (15) 30.0
 
Jan. 17, 2021, 6 p.m. 2.6 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 3.5 μg/m3 (15) 29.0
 
Jan. 17, 2021, 5 p.m. 3.2 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 3.3 μg/m3 (14) 26.0