AQSQID: 460110003

Site Name: Research Farm

Location: Brookings Co, SD

Reporting: True, Located: True

Current AQI: 43.0

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
March 25, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 4.0 μg/m3 (4) 4.3 μg/m3 (18) 43.0
 
March 25, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 7.0 μg/m3 (6) 1.6 μg/m3 (7) 43.0
 
March 25, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 6.0 μg/m3 (5) 4.5 μg/m3 (19) 42.0
 
March 25, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 5.0 μg/m3 (5) 6.2 μg/m3 (26) 42.0
 
March 25, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A -1.0 μg/m3 (0) 2.1 μg/m3 (9) 40.0
 
March 25, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 3.0 μg/m3 (3) 3.5 μg/m3 (15) 38.0
 
March 25, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 2.0 μg/m3 (2) 1.8 μg/m3 (8) 35.0
 
March 25, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 1.0 μg/m3 (1) 0.8 μg/m3 (3) 34.0
 
March 25, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 9.0 μg/m3 (8) 0.6 μg/m3 (2) 33.0
 
March 25, 2019, 11 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) 2.5 μg/m3 (10) 34.0
 
March 25, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 5.0 μg/m3 (5) 2.5 μg/m3 (10) 35.0
 
March 25, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 9.0 μg/m3 (8) 1.3 μg/m3 (5) 35.0
 
March 25, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) 3.3 μg/m3 (14) 35.0
 
March 25, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 22.0 μg/m3 (20) 5.7 μg/m3 (24) 35.0
 
March 25, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 13.0 μg/m3 (12) 6.4 μg/m3 (27) 35.0
 
March 25, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 8.2 μg/m3 (34) 35.0
 
March 25, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 6.7 μg/m3 (28) 35.0
 
March 25, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 6.4 μg/m3 (27) 36.0
 
March 25, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 9.3 μg/m3 (39) 39.0
 
March 25, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 20.0 μg/m3 (18) 16.6 μg/m3 (60) 60.0
 
March 25, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 21.0 μg/m3 (19) 14.8 μg/m3 (56) 56.0
 
March 24, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 20.0 μg/m3 (18) 13.8 μg/m3 (54) 54.0
 
March 24, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 20.0 μg/m3 (18) 8.6 μg/m3 (36) 36.0
 
March 24, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 8.2 μg/m3 (34) 37.0
 
March 24, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 26.0 μg/m3 (24) 11.3 μg/m3 (47) 47.0
 
March 24, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 14.0 μg/m3 (13) 11.5 μg/m3 (48) 48.0
 
March 24, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 10.0 μg/m3 (9) 12.1 μg/m3 (50) 50.0
 
March 24, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 20.0 μg/m3 (18) 11.3 μg/m3 (47) 47.0
 
March 24, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 18.0 μg/m3 (16) 8.2 μg/m3 (34) 39.0
 
March 24, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 20.0 μg/m3 (18) 8.4 μg/m3 (35) 38.0
 
March 24, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 6.4 μg/m3 (27) 36.0
 
March 24, 2019, 1 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) 9.8 μg/m3 (41) 41.0
 
March 24, 2019, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 4.0 μg/m3 (4) 6.7 μg/m3 (28) 37.0
 
March 24, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 10.0 μg/m3 (9) 6.7 μg/m3 (28) 40.0
 
March 24, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 13.0 μg/m3 (12) 7.9 μg/m3 (33) 41.0
 
March 24, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 16.0 μg/m3 (15) 5.9 μg/m3 (25) 42.0
 
March 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 13.0 μg/m3 (12) 8.3 μg/m3 (35) 36.0
 
March 24, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 31.0 μg/m3 (28) 9.6 μg/m3 (40) 40.0
 
March 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 19.0 μg/m3 (17) 7.2 μg/m3 (30) 36.0
 
March 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 13.0 μg/m3 (12) 9.8 μg/m3 (41) 41.0
 
March 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 13.0 μg/m3 (12) 9.1 μg/m3 (38) 38.0
 
March 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 15.0 μg/m3 (14) 9.4 μg/m3 (39) 39.0
 
March 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 20.0 μg/m3 (18) 10.9 μg/m3 (45) 45.0
 
March 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 17.0 μg/m3 (15) 8.2 μg/m3 (34) 35.0
 
March 24, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 20.0 μg/m3 (18) 6.9 μg/m3 (29) 37.0
 
March 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 23.0 μg/m3 (21) 8.9 μg/m3 (37) 38.0
 
March 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 18.0 μg/m3 (16) 5.2 μg/m3 (22) 40.0
 
March 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 20.0 μg/m3 (18) 6.7 μg/m3 (28) 42.0
 
March 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 12.0 μg/m3 (11) 11.1 μg/m3 (46) 46.0
 
March 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 14.0 μg/m3 (13) 6.7 μg/m3 (28) 42.0
 
March 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 11.0 μg/m3 (10) 6.4 μg/m3 (27) 42.0
 
March 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 7.0 μg/m3 (6) 7.9 μg/m3 (33) 41.0
 
March 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 8.0 μg/m3 (7) 7.4 μg/m3 (31) 40.0
 
March 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 6.0 μg/m3 (5) 6.2 μg/m3 (26) 39.0
 
March 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 4.0 μg/m3 (4) 6.4 μg/m3 (27) 38.0
 
March 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 13.0 μg/m3 (12) 7.4 μg/m3 (31) 37.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 15.0 μg/m3 (14) 8.4 μg/m3 (35) 35.0
 
March 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 15.0 μg/m3 (14) 6.9 μg/m3 (29) 35.0
 
March 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 34.0
 
March 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 12.0 μg/m3 (11) 7.7 μg/m3 (32) 36.0
 
March 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 6.7 μg/m3 (28) 37.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 5.0 μg/m3 (5) 6.2 μg/m3 (26) 38.0
 
March 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 17.0 μg/m3 (15) 4.8 μg/m3 (20) 35.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 12.0 μg/m3 (11) 6.5 μg/m3 (27) 35.0
 
March 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 8.0 μg/m3 (7) 8.4 μg/m3 (35) 37.0
 
March 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 38.0
 
March 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 38.0
 
March 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 37.0
 
March 23, 2019, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 14.0 μg/m3 (13) 1.8 μg/m3 (8) 40.0
 
March 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 11.0 μg/m3 (10) 2.8 μg/m3 (12) 43.0
 
March 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 44.0
 
March 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 45.0
 
March 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 12.0 μg/m3 (11) 1.8 μg/m3 (8) 45.0
 
March 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 45.0
 
March 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 12.0 μg/m3 (11) 3.8 μg/m3 (16) 44.0
 
March 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 42.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 3.0 μg/m3 (3) 4.2 μg/m3 (18) 42.0
 
March 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 40.0
 
March 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 1.0 μg/m3 (1) 4.3 μg/m3 (18) 35.0
 
March 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 6.0 μg/m3 (5) 5.2 μg/m3 (22) 33.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 35.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 6.0 μg/m3 (5) 1.1 μg/m3 (5) 38.0
 
March 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 39.0
 
March 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 11.0 μg/m3 (10) 3.0 μg/m3 (12) 42.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 7.0 μg/m3 (6) 5.7 μg/m3 (24) 43.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 18.0 μg/m3 (16) 5.7 μg/m3 (24) 45.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 16.0 μg/m3 (15) 7.2 μg/m3 (30) 44.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 10.0 μg/m3 (9) 8.9 μg/m3 (37) 43.0
 
March 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 17.0 μg/m3 (15) 8.1 μg/m3 (34) 42.0
 
March 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 15.0 μg/m3 (14) 6.9 μg/m3 (29) 42.0
 
March 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 17.0 μg/m3 (15) 6.0 μg/m3 (25) 38.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 16.0 μg/m3 (15) 9.1 μg/m3 (38) 40.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 21.0 μg/m3 (19) 9.6 μg/m3 (40) 41.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 22.0 μg/m3 (20) 10.6 μg/m3 (44) 44.0
 
March 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 18.0 μg/m3 (16) 9.6 μg/m3 (40) 42.0
 
March 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 15.0 μg/m3 (14) 8.9 μg/m3 (37) 43.0
 
March 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 25.0 μg/m3 (23) 7.4 μg/m3 (31) 45.0
 
March 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 18.0 μg/m3 (16) 8.9 μg/m3 (37) 46.0
 
March 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A 15.0 μg/m3 (14) 8.6 μg/m3 (36) 48.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A 14.0 μg/m3 (13) 10.1 μg/m3 (42) 48.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 7.0 μg/m3 (6) 5.5 μg/m3 (23) 42.0
 
March 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 4.0 μg/m3 (4) 6.7 μg/m3 (28) 38.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 10.0 μg/m3 (9) 8.4 μg/m3 (35) 37.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 11.0 μg/m3 (10) 2.5 μg/m3 (10) 32.0
 
March 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 11.0 μg/m3 (10) 3.8 μg/m3 (16) 38.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 10.0 μg/m3 (9) 6.9 μg/m3 (29) 39.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 6.0 μg/m3 (5) 6.2 μg/m3 (26) 39.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 11.0 μg/m3 (10) 4.5 μg/m3 (19) 42.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 8.0 μg/m3 (7) 3.3 μg/m3 (14) 41.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 12.0 μg/m3 (11) 4.8 μg/m3 (20) 41.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 6.0 μg/m3 (5) 7.9 μg/m3 (33) 43.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 9.0 μg/m3 (8) 8.9 μg/m3 (37) 43.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 9.0 μg/m3 (8) 6.9 μg/m3 (29) 44.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A 10.0 μg/m3 (9) 4.5 μg/m3 (19) 45.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A 10.0 μg/m3 (9) 6.7 μg/m3 (28) 45.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A 11.0 μg/m3 (10) 7.7 μg/m3 (32) 45.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 18.0 μg/m3 (16) 8.0 μg/m3 (33) 46.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 15.0 μg/m3 (14) 6.7 μg/m3 (28) 47.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 18.0 μg/m3 (16) 4.0 μg/m3 (17) 47.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 14.0 μg/m3 (13) 6.7 μg/m3 (28) 47.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 13.0 μg/m3 (12) 10.1 μg/m3 (42) 47.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 12.0 μg/m3 (11) 8.6 μg/m3 (36) 47.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 10.0 μg/m3 (9) 9.9 μg/m3 (41) 45.0
 
March 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 42.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 40.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 5.0 μg/m3 (5) 5.5 μg/m3 (23) 39.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 1.0 μg/m3 (1) 4.0 μg/m3 (17) 38.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) 6.2 μg/m3 (26) 38.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) 7.9 μg/m3 (33) 38.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 40.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 12.0 μg/m3 (11) 7.7 μg/m3 (32) 43.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 19.0 μg/m3 (17) 13.9 μg/m3 (54) 54.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 26.0 μg/m3 (24) 15.9 μg/m3 (58) 58.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A 25.0 μg/m3 (23) 19.7 μg/m3 (66) 66.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (50) N/A 22.0 μg/m3 (20) 21.9 μg/m3 (71) 71.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) N/A 15.0 μg/m3 (14) 12.6 μg/m3 (51) 51.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 13.0 μg/m3 (12) 9.6 μg/m3 (40) 46.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 8.0 μg/m3 (7) 13.1 μg/m3 (52) 52.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 16.0 μg/m3 (15) 7.4 μg/m3 (31) 43.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A -1.0 μg/m3 (0) 4.0 μg/m3 (17) 45.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 44.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 45.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 13.0 μg/m3 (12) 2.1 μg/m3 (9) 45.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 15.0 μg/m3 (14) 3.3 μg/m3 (14) 44.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 42.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (12) 38.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 18.0 μg/m3 (16) 5.2 μg/m3 (22) 36.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 10.0 μg/m3 (9) 6.9 μg/m3 (29) 32.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 31.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 29.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 7.9 μg/m3 (33) 33.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 11.0 μg/m3 (10) 2.1 μg/m3 (9) 26.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 12.0 μg/m3 (11) 3.8 μg/m3 (16) 26.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 6.0 μg/m3 (5) 4.5 μg/m3 (19) 29.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 10.0 μg/m3 (9) 2.1 μg/m3 (9) 34.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 3.3 μg/m3 (14) 35.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 3.0 μg/m3 (3) 4.8 μg/m3 (20) 36.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 38.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 6.0 μg/m3 (5) 2.6 μg/m3 (11) 38.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 7.0 μg/m3 (6) 1.8 μg/m3 (8) 38.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 4.0 μg/m3 (4) 0.1 μg/m3 (0) 38.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 9.0 μg/m3 (8) 1.8 μg/m3 (8) 39.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 10.0 μg/m3 (9) 2.6 μg/m3 (11) 39.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 19.0 μg/m3 (17) 1.1 μg/m3 (5) 42.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 12.0 μg/m3 (11) 3.5 μg/m3 (15) 44.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A 11.0 μg/m3 (10) 6.7 μg/m3 (28) 45.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 46.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A -2.0 μg/m3 (0) 6.7 μg/m3 (28) 48.0