AQSQID: 460110003

Site Name: Research Farm

Location: Brookings (Wern Ave), SD

Reporting: True, Located: True

Current AQI: 24.0

Brookings (Wern Ave) SD, US: 44.348604, -96.807299

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 5.7 μg/m3 (24) 24.0
 
Jan. 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 3.8 μg/m3 (16) 23.0
 
Jan. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 15.0 μg/m3 (14) 7.2 μg/m3 (30) 30.0
 
Jan. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 8.9 μg/m3 (37) 37.0
 
Jan. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 7.9 μg/m3 (33) 33.0
 
Jan. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 5.0 μg/m3 (5) 5.7 μg/m3 (24) 24.0
 
Jan. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) 5.2 μg/m3 (22) 24.0
 
Jan. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 11.0 μg/m3 (10) 1.6 μg/m3 (7) 21.0
 
Jan. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 32.0 μg/m3 (29) 2.3 μg/m3 (10) 29.0
 
Jan. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 31.0 μg/m3 (28) 0.1 μg/m3 (0) 28.0
 
Jan. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 103.0 μg/m3 (74) 0.1 μg/m3 (0) 74.0
 
Jan. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 59.0 μg/m3 (52) 1.8 μg/m3 (8) 52.0
 
Jan. 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 43.0 μg/m3 (39) 5.0 μg/m3 (21) 39.0
 
Jan. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 43.0 μg/m3 (39) 7.9 μg/m3 (33) 39.0
 
Jan. 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 42.0 μg/m3 (38) 4.7 μg/m3 (20) 38.0
 
Jan. 20, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 21.0 μg/m3 (19) 5.2 μg/m3 (22) 23.0
 
Jan. 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 6.0 μg/m3 (5) 5.9 μg/m3 (25) 25.0
 
Jan. 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 9.9 μg/m3 (41) 41.0
 
Jan. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 7.2 μg/m3 (30) 30.0
 
Jan. 20, 2020, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 6.9 μg/m3 (29) 29.0
 
Jan. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 6.9 μg/m3 (29) 29.0
 
Jan. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 4.8 μg/m3 (20) 22.0
 
Jan. 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 22.0
 
Jan. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 5.0 μg/m3 (5) 8.4 μg/m3 (35) 35.0
 
Jan. 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 6.0 μg/m3 (5) 5.5 μg/m3 (23) 23.0
 
Jan. 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 4.8 μg/m3 (20) 22.0
 
Jan. 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 7.2 μg/m3 (30) 30.0
 
Jan. 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 22.0
 
Jan. 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 22.0
 
Jan. 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 10.0 μg/m3 (9) 4.7 μg/m3 (20) 22.0
 
Jan. 20, 2020, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 5.0 μg/m3 (21) 22.0
 
Jan. 19, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 23.0 μg/m3 (21) 7.2 μg/m3 (30) 30.0
 
Jan. 19, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 25.0 μg/m3 (23) 6.9 μg/m3 (29) 29.0
 
Jan. 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 22.0 μg/m3 (20) 6.2 μg/m3 (26) 26.0
 
Jan. 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 25.0 μg/m3 (23) 5.2 μg/m3 (22) 24.0
 
Jan. 19, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 40.0 μg/m3 (36) 3.3 μg/m3 (14) 36.0
 
Jan. 19, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 16.0 μg/m3 (15) 3.5 μg/m3 (15) 23.0
 
Jan. 19, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 21.0 μg/m3 (19) 2.5 μg/m3 (10) 22.0
 
Jan. 19, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 51.0 μg/m3 (46) 2.3 μg/m3 (10) 46.0
 
Jan. 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 22.0
 
Jan. 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 22.0
 
Jan. 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 22.0
 
Jan. 19, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 2.3 μg/m3 (10) 22.0
 
Jan. 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 4.3 μg/m3 (18) 22.0
 
Jan. 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 8.0 μg/m3 (7) 7.7 μg/m3 (32) 32.0
 
Jan. 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 7.2 μg/m3 (30) 30.0
 
Jan. 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 7.0 μg/m3 (6) 3.3 μg/m3 (14) 23.0
 
Jan. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 4.8 μg/m3 (20) 23.0
 
Jan. 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 11.0 μg/m3 (10) 4.3 μg/m3 (18) 23.0
 
Jan. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 3.3 μg/m3 (14) 23.0
 
Jan. 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 15.0 μg/m3 (14) 3.5 μg/m3 (15) 24.0
 
Jan. 19, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 13.0 μg/m3 (12) 4.5 μg/m3 (19) 23.0
 
Jan. 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 15.0 μg/m3 (14) 5.0 μg/m3 (21) 23.0
 
Jan. 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 18.0 μg/m3 (16) 2.8 μg/m3 (12) 23.0
 
Jan. 19, 2020, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 20.0 μg/m3 (18) 4.8 μg/m3 (20) 23.0
 
Jan. 18, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 24.0 μg/m3 (22) 7.2 μg/m3 (30) 30.0
 
Jan. 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 45.0 μg/m3 (41) 6.2 μg/m3 (26) 41.0
 
Jan. 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 120.0 μg/m3 (82) 8.6 μg/m3 (36) 82.0
 
Jan. 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 107.0 μg/m3 (76) 7.7 μg/m3 (32) 76.0
 
Jan. 18, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 78.0 μg/m3 (62) 7.4 μg/m3 (31) 62.0
 
Jan. 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 48.0 μg/m3 (44) 9.6 μg/m3 (40) 44.0
 
Jan. 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 30.0 μg/m3 (27) 8.1 μg/m3 (34) 34.0
 
Jan. 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 45.0 μg/m3 (41) 8.6 μg/m3 (36) 41.0
 
Jan. 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 33.0 μg/m3 (30) 10.6 μg/m3 (44) 44.0
 
Jan. 18, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 29.0 μg/m3 (26) 7.9 μg/m3 (33) 33.0
 
Jan. 18, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 35.0 μg/m3 (32) 6.0 μg/m3 (25) 32.0
 
Jan. 18, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 58.0 μg/m3 (52) 4.3 μg/m3 (18) 52.0
 
Jan. 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 108.0 μg/m3 (76) 4.0 μg/m3 (17) 76.0
 
Jan. 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 5.5 μg/m3 (23) 23.0
 
Jan. 18, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 43.0 μg/m3 (39) 5.5 μg/m3 (23) 39.0
 
Jan. 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 2.5 μg/m3 (10) 23.0
 
Jan. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 2.0 μg/m3 (2) 0.8 μg/m3 (3) 21.0
 
Jan. 18, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 0.8 μg/m3 (3) 21.0
 
Jan. 18, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 0.3 μg/m3 (1) 21.0
 
Jan. 18, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 2.0 μg/m3 (2) -0.5 μg/m3 (0) 21.0
 
Jan. 18, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 2.8 μg/m3 (12) 21.0
 
Jan. 18, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 6.0 μg/m3 (5) 4.2 μg/m3 (18) 21.0
 
Jan. 18, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 2.0 μg/m3 (2) 1.1 μg/m3 (5) 22.0
 
Jan. 18, 2020, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 2.8 μg/m3 (12) 22.0
 
Jan. 17, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 1.8 μg/m3 (8) 22.0
 
Jan. 17, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 14.0 μg/m3 (13) 2.8 μg/m3 (12) 23.0
 
Jan. 17, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 18.0 μg/m3 (16) 2.3 μg/m3 (10) 24.0
 
Jan. 17, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 21.0 μg/m3 (19) 2.3 μg/m3 (10) 24.0
 
Jan. 17, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 32.0 μg/m3 (29) 1.8 μg/m3 (8) 29.0
 
Jan. 17, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 26.0 μg/m3 (24) 1.1 μg/m3 (5) 24.0
 
Jan. 17, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 60.0 μg/m3 (52) 0.8 μg/m3 (3) 52.0
 
Jan. 17, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 47.0 μg/m3 (43) 3.3 μg/m3 (14) 43.0
 
Jan. 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 44.0 μg/m3 (40) 6.0 μg/m3 (25) 40.0
 
Jan. 17, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 15.0 μg/m3 (14) 4.5 μg/m3 (19) 24.0
 
Jan. 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 11.0 μg/m3 (10) 3.5 μg/m3 (15) 25.0
 
Jan. 17, 2020, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 18.0 μg/m3 (16) 4.7 μg/m3 (20) 24.0
 
Jan. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 14.0 μg/m3 (13) 1.3 μg/m3 (5) 25.0
 
Jan. 17, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 26.0
 
Jan. 17, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 14.0 μg/m3 (13) 1.8 μg/m3 (8) 26.0
 
Jan. 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 1.5 μg/m3 (6) 25.0
 
Jan. 17, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 8.0 μg/m3 (7) 3.3 μg/m3 (14) 25.0
 
Jan. 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 26.0
 
Jan. 17, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 15.0 μg/m3 (14) 4.7 μg/m3 (20) 26.0
 
Jan. 17, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 17.0 μg/m3 (15) 4.3 μg/m3 (18) 25.0
 
Jan. 17, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 16.0 μg/m3 (15) 0.3 μg/m3 (1) 25.0
 
Jan. 17, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 11.0 μg/m3 (10) -2.0 μg/m3 (0) 26.0
 
Jan. 17, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 12.0 μg/m3 (11) -0.3 μg/m3 (0) 27.0
 
Jan. 17, 2020, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 1.1 μg/m3 (5) 25.0
 
Jan. 16, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 0.8 μg/m3 (3) 26.0
 
Jan. 16, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 12.0 μg/m3 (11) 0.8 μg/m3 (3) 28.0
 
Jan. 16, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 11.0 μg/m3 (10) 2.3 μg/m3 (10) 28.0
 
Jan. 16, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (12) 28.0
 
Jan. 16, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 13.0 μg/m3 (12) 4.7 μg/m3 (20) 26.0
 
Jan. 16, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 11.0 μg/m3 (10) 8.1 μg/m3 (34) 34.0
 
Jan. 16, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 11.1 μg/m3 (46) 46.0
 
Jan. 16, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 14.0 μg/m3 (13) N/A 46.0
 
Jan. 16, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 15.0 μg/m3 (14) 9.8 μg/m3 (41) 41.0
 
Jan. 16, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 5.3 μg/m3 (22) 22.0
 
Jan. 16, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 11.0 μg/m3 (10) 6.7 μg/m3 (28) 28.0
 
Jan. 16, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 7.2 μg/m3 (30) 30.0
 
Jan. 16, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 24.0
 
Jan. 16, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 24.0
 
Jan. 16, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 25.0
 
Jan. 16, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 8.0 μg/m3 (7) 4.8 μg/m3 (20) 25.0
 
Jan. 16, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) 8.6 μg/m3 (36) 36.0
 
Jan. 16, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 4.3 μg/m3 (18) 25.0
 
Jan. 16, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 8.0 μg/m3 (7) 1.3 μg/m3 (5) 26.0
 
Jan. 16, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 2.3 μg/m3 (10) 26.0
 
Jan. 16, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 10.0 μg/m3 (9) 2.5 μg/m3 (10) 27.0
 
Jan. 16, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 8.0 μg/m3 (7) 1.1 μg/m3 (5) 28.0
 
Jan. 15, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 1.8 μg/m3 (8) 26.0
 
Jan. 15, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 2.3 μg/m3 (10) 26.0
 
Jan. 15, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 2.8 μg/m3 (12) 27.0
 
Jan. 15, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 27.0
 
Jan. 15, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 2.5 μg/m3 (10) 25.0
 
Jan. 15, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (12) 25.0
 
Jan. 15, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 20.0 μg/m3 (18) 1.1 μg/m3 (5) 24.0
 
Jan. 15, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) -2.5 μg/m3 (0) 22.0
 
Jan. 15, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 25.0 μg/m3 (23) -0.5 μg/m3 (0) 23.0
 
Jan. 15, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 8.0 μg/m3 (7) 5.5 μg/m3 (23) 23.0
 
Jan. 15, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 7.4 μg/m3 (31) 31.0
 
Jan. 15, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 22.0
 
Jan. 15, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 3.8 μg/m3 (16) 22.0
 
Jan. 15, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 2.5 μg/m3 (10) 22.0
 
Jan. 15, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 4.8 μg/m3 (20) 22.0
 
Jan. 15, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 7.6 μg/m3 (32) 32.0
 
Jan. 15, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 4.5 μg/m3 (19) 22.0
 
Jan. 15, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 2.5 μg/m3 (10) 22.0
 
Jan. 15, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 5.5 μg/m3 (23) 23.0
 
Jan. 15, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 13.0 μg/m3 (12) 8.1 μg/m3 (34) 34.0
 
Jan. 15, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 5.7 μg/m3 (24) 24.0
 
Jan. 15, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 13.0 μg/m3 (12) 4.7 μg/m3 (20) 24.0
 
Jan. 15, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 11.0 μg/m3 (10) 7.6 μg/m3 (32) 32.0
 
Jan. 15, 2020, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 13.0 μg/m3 (12) 8.6 μg/m3 (36) 36.0
 
Jan. 14, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 13.0 μg/m3 (12) 6.7 μg/m3 (28) 28.0
 
Jan. 14, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 15.0 μg/m3 (14) 7.4 μg/m3 (31) 31.0
 
Jan. 14, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 13.0 μg/m3 (12) 10.3 μg/m3 (43) 43.0
 
Jan. 14, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 12.0 μg/m3 (11) 7.9 μg/m3 (33) 33.0
 
Jan. 14, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 13.0 μg/m3 (12) 8.6 μg/m3 (36) 36.0
 
Jan. 14, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) 10.3 μg/m3 (43) 43.0
 
Jan. 14, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 17.0 μg/m3 (15) 12.3 μg/m3 (51) 51.0
 
Jan. 14, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 17.0 μg/m3 (15) 5.5 μg/m3 (23) 23.0
 
Jan. 14, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 13.0 μg/m3 (12) 7.9 μg/m3 (33) 33.0
 
Jan. 14, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 15.0 μg/m3 (14) 6.2 μg/m3 (26) 26.0
 
Jan. 14, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 18.0 μg/m3 (16) 8.4 μg/m3 (35) 35.0
 
Jan. 14, 2020, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 35.0 μg/m3 (32) 5.4 μg/m3 (23) 32.0
 
Jan. 14, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 15.0 μg/m3 (14) 3.5 μg/m3 (15) 20.0
 
Jan. 14, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 13.0 μg/m3 (12) 4.7 μg/m3 (20) 20.0
 
Jan. 14, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 6.2 μg/m3 (26) 26.0