AQSQID: 460110003

Site Name: Research Farm

Location: Brookings Co, SD

Reporting: True, Located: True

Current AQI: 22.0

Brookings Co SD, US: 44.348604, -96.807299

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) 2.1 μg/m3 (9) 22.0
 
May 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) 0.9 μg/m3 (4) 23.0
 
May 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 25.0
 
May 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) 1.4 μg/m3 (6) 25.0
 
May 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 0.0 μg/m3 (0) -0.7 μg/m3 (0) 28.0
 
May 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) -2.1 μg/m3 (0) 28.0
 
May 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) -1.2 μg/m3 (0) 28.0
 
May 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) -1.4 μg/m3 (0) 28.0
 
May 23, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) 1.6 μg/m3 (7) 29.0
 
May 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 5.0 μg/m3 (5) 5.6 μg/m3 (23) 29.0
 
May 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) 4.8 μg/m3 (20) 26.0
 
May 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 5.0 μg/m3 (5) 1.1 μg/m3 (5) 24.0
 
May 22, 2019, 8 p.m. 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
 
May 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 11.0 μg/m3 (10) 1.6 μg/m3 (7) 39.0
 
May 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 11.0 μg/m3 (10) 1.1 μg/m3 (5) 33.0
 
May 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 3.1 μg/m3 (13) 34.0
 
May 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 6.0 μg/m3 (5) 3.1 μg/m3 (13) 34.0
 
May 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) 3.3 μg/m3 (14) 32.0
 
May 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 27.0
 
May 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) -1.2 μg/m3 (0) 25.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) -0.9 μg/m3 (0) 3.0
 
May 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 2.0 μg/m3 (2) -1.4 μg/m3 (0) 27.0
 
May 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) -0.2 μg/m3 (0) 28.0
 
May 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) 1.1 μg/m3 (5) 28.0
 
May 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) 0.2 μg/m3 (1) 30.0
 
May 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 31.0
 
May 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 1.0 μg/m3 (1) 1.7 μg/m3 (7) 32.0
 
May 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 2.0 μg/m3 (2) -1.4 μg/m3 (0) 33.0
 
May 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 4.0 μg/m3 (4) -0.5 μg/m3 (0) 34.0
 
May 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) 0.6 μg/m3 (2) 34.0
 
May 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) 0.4 μg/m3 (2) 33.0
 
May 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 38.0 μg/m3 (35) 1.1 μg/m3 (5) 35.0
 
May 22, 2019, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 5.0 μg/m3 (5) 1.4 μg/m3 (6) 32.0
 
May 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 3.0 μg/m3 (3) 2.1 μg/m3 (9) 31.0
 
May 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) 3.1 μg/m3 (13) 32.0
 
May 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 8.0 μg/m3 (7) 1.1 μg/m3 (5) 32.0
 
May 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 10.0 μg/m3 (9) 2.4 μg/m3 (10) 32.0
 
May 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 3.1 μg/m3 (13) 31.0
 
May 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 7.0 μg/m3 (6) 2.4 μg/m3 (10) 31.0
 
May 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 7.0 μg/m3 (6) 2.1 μg/m3 (9) 32.0
 
May 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 8.0 μg/m3 (7) 3.1 μg/m3 (13) 32.0
 
May 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 7.0 μg/m3 (6) 4.6 μg/m3 (19) 32.0
 
May 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 8.0 μg/m3 (7) 4.4 μg/m3 (18) 32.0
 
May 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) 1.9 μg/m3 (8) 29.0
 
May 21, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 0.2 μg/m3 (1) 26.0
 
May 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 0.9 μg/m3 (4) 26.0
 
May 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 7.0 μg/m3 (6) 1.9 μg/m3 (8) 25.0
 
May 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 28.0
 
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 5.0 μg/m3 (5) 2.9 μg/m3 (12) 28.0
 
May 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 25.0
 
May 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 1.1 μg/m3 (5) 25.0
 
May 21, 2019, 5 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) 2.1 μg/m3 (9) 23.0
 
May 21, 2019, 4 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) 0.9 μg/m3 (4) 23.0
 
May 21, 2019, 3 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) -4.3 μg/m3 (0) 24.0
 
May 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) -1.2 μg/m3 (0) 25.0
 
May 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) 1.6 μg/m3 (7) 28.0
 
May 21, 2019, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 32.0
 
May 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 4.0 μg/m3 (4) -0.7 μg/m3 (0) 34.0
 
May 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 2.0 μg/m3 (2) -2.9 μg/m3 (0) 34.0
 
May 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 0.0 μg/m3 (0) -1.9 μg/m3 (0) 33.0
 
May 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 1.0 μg/m3 (1) -2.4 μg/m3 (0) 33.0
 
May 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 1.0 μg/m3 (1) -4.6 μg/m3 (0) 32.0
 
May 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 2.0 μg/m3 (2) -2.2 μg/m3 (0) 33.0
 
May 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 5.0 μg/m3 (5) -1.2 μg/m3 (0) 35.0
 
May 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 35.0
 
May 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A -1.0 μg/m3 (0) 2.9 μg/m3 (12) 35.0
 
May 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 1.4 μg/m3 (6) 31.0
 
May 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 1.0 μg/m3 (1) 0.2 μg/m3 (1) 25.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 22.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 0.0 μg/m3 (0) 1.4 μg/m3 (6) 20.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) 0.4 μg/m3 (2) 22.0
 
May 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) -2.6 μg/m3 (0) 23.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 24.0
 
May 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 1.0 μg/m3 (1) 5.1 μg/m3 (21) 25.0
 
May 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 1.1 μg/m3 (5) 25.0
 
May 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 0.6 μg/m3 (2) 28.0
 
May 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 30.0
 
May 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 3.0 μg/m3 (3) -1.4 μg/m3 (0) 32.0
 
May 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 30.0
 
May 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 1.0 μg/m3 (1) 4.1 μg/m3 (17) 29.0
 
May 20, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 5.0 μg/m3 (21) 28.0
 
May 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 3.0 μg/m3 (3) -1.0 μg/m3 (0) 28.0
 
May 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) -4.1 μg/m3 (0) 28.0
 
May 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) N/A 28.0
 
May 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) N/A 28.0
 
May 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A -1.0 μg/m3 (0) -3.6 μg/m3 (0) 26.0
 
May 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) -1.2 μg/m3 (0) 27.0
 
May 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) 0.2 μg/m3 (1) 28.0
 
May 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 28.0
 
May 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) 0.4 μg/m3 (2) 30.0
 
May 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 2.1 μg/m3 (9) 31.0
 
May 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 0.0 μg/m3 (0) 1.1 μg/m3 (5) 30.0
 
May 19, 2019, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) 0.9 μg/m3 (4) 30.0
 
May 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) 0.2 μg/m3 (1) 32.0
 
May 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 0.0 μg/m3 (0) 0.2 μg/m3 (1) 33.0
 
May 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A -1.0 μg/m3 (0) 0.4 μg/m3 (2) 34.0
 
May 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A -1.0 μg/m3 (0) -0.2 μg/m3 (0) 32.0
 
May 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 0.0 μg/m3 (0) -1.2 μg/m3 (0) 32.0
 
May 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A -1.0 μg/m3 (0) -0.7 μg/m3 (0) 31.0
 
May 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A -1.0 μg/m3 (0) -1.7 μg/m3 (0) 32.0
 
May 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 2.0 μg/m3 (2) -1.4 μg/m3 (0) 33.0
 
May 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) -0.5 μg/m3 (0) 33.0
 
May 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 4.0 μg/m3 (4) -0.5 μg/m3 (0) 32.0
 
May 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) 0.2 μg/m3 (1) 32.0
 
May 19, 2019, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 30.0
 
May 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 1.4 μg/m3 (6) 28.0
 
May 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 3.0 μg/m3 (3) 1.1 μg/m3 (5) 27.0
 
May 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 2.0 μg/m3 (2) 1.9 μg/m3 (8) 27.0
 
May 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 27.0
 
May 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 1.0 μg/m3 (1) 1.6 μg/m3 (7) 27.0
 
May 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 27.0
 
May 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) -0.2 μg/m3 (0) 26.0
 
May 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 7.0 μg/m3 (6) 2.8 μg/m3 (12) 25.0
 
May 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 4.8 μg/m3 (20) 23.0
 
May 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 5.1 μg/m3 (21) 22.0
 
May 18, 2019, 1 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) 4.6 μg/m3 (19) 22.0
 
May 18, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 5.0 μg/m3 (5) 4.6 μg/m3 (19) 22.0
 
May 18, 2019, 11 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) 4.3 μg/m3 (18) 23.0
 
May 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 25.0
 
May 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 25.0
 
May 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 9.0 μg/m3 (8) 6.8 μg/m3 (28) 28.0
 
May 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 4.3 μg/m3 (18) 25.0
 
May 18, 2019, 6 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) 3.1 μg/m3 (13) 26.0
 
May 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 10.0 μg/m3 (9) 4.1 μg/m3 (17) 28.0
 
May 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 10.0 μg/m3 (9) 3.9 μg/m3 (16) 30.0
 
May 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 9.0 μg/m3 (8) 6.1 μg/m3 (25) 32.0
 
May 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A N/A 31.0
 
May 18, 2019, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 21.0 μg/m3 (19) 6.5 μg/m3 (27) 32.0
 
May 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 24.0 μg/m3 (22) 4.6 μg/m3 (19) 35.0
 
May 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 29.0 μg/m3 (26) 5.3 μg/m3 (22) 38.0
 
May 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 50.0 μg/m3 (45) 2.1 μg/m3 (9) 45.0
 
May 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 33.0 μg/m3 (30) 2.6 μg/m3 (11) 37.0
 
May 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 21.0 μg/m3 (19) 3.4 μg/m3 (14) 36.0
 
May 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 22.0 μg/m3 (20) 1.4 μg/m3 (6) 35.0
 
May 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 19.0 μg/m3 (17) 3.6 μg/m3 (15) 34.0
 
May 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 25.0 μg/m3 (23) 3.4 μg/m3 (14) 32.0
 
May 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 10.0 μg/m3 (9) 2.4 μg/m3 (10) 28.0
 
May 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 10.0 μg/m3 (9) 1.7 μg/m3 (7) 26.0
 
May 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) -1.1 μg/m3 (0) 25.0
 
May 17, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 8.0 μg/m3 (7) 1.2 μg/m3 (5) 26.0
 
May 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 8.0 μg/m3 (7) 3.8 μg/m3 (16) 27.0
 
May 17, 2019, 10 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) 0.4 μg/m3 (2) 26.0
 
May 17, 2019, 9 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) 2.9 μg/m3 (12) 26.0
 
May 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 15.0 μg/m3 (14) 1.9 μg/m3 (8) 28.0
 
May 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 15.0 μg/m3 (14) 1.7 μg/m3 (7) 30.0
 
May 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 15.0 μg/m3 (14) 2.4 μg/m3 (10) 33.0
 
May 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 26.0 μg/m3 (24) 1.9 μg/m3 (8) 33.0
 
May 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 16.0 μg/m3 (15) 1.7 μg/m3 (7) 31.0
 
May 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 18.0 μg/m3 (16) 1.4 μg/m3 (6) 32.0
 
May 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 26.0 μg/m3 (24) 2.1 μg/m3 (9) 31.0
 
May 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 46.0 μg/m3 (42) 3.1 μg/m3 (13) 42.0
 
May 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 58.0 μg/m3 (52) 4.6 μg/m3 (19) 52.0
 
May 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 26.0 μg/m3 (24) 7.0 μg/m3 (29) 37.0
 
May 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 38.0 μg/m3 (35) 3.1 μg/m3 (13) 38.0
 
May 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 36.0 μg/m3 (33) 6.3 μg/m3 (26) 35.0
 
May 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 51.0 μg/m3 (46) 8.5 μg/m3 (35) 46.0
 
May 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 71.0 μg/m3 (58) 2.6 μg/m3 (11) 58.0
 
May 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 32.0 μg/m3 (29) 2.6 μg/m3 (11) 37.0
 
May 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 50.0 μg/m3 (45) 4.4 μg/m3 (18) 45.0
 
May 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.8 μg/m3 (32) 32.0
 
May 16, 2019, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 21.0 μg/m3 (19) 11.7 μg/m3 (49) 49.0
 
May 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 26.0 μg/m3 (24) 1.9 μg/m3 (8) 25.0
 
May 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 19.0 μg/m3 (17) 3.4 μg/m3 (14) 25.0
 
May 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 21.0 μg/m3 (19) 4.3 μg/m3 (18) 28.0
 
May 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 21.0 μg/m3 (19) 6.8 μg/m3 (28) 31.0
 
May 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 24.0 μg/m3 (22) 8.1 μg/m3 (34) 35.0
 
May 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 30.0 μg/m3 (27) 4.6 μg/m3 (19) 40.0