AQSQID: 461270001

Site Name: Uc1

Location: Union Co, SD

Reporting: True, Located: True

Current AQI: 25.0

Union Co SD, US: 42.751518, -96.707208

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
July 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 12.0 μg/m3 (11) 7.6 μg/m3 (32) 32.0
 
July 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 18.0
 
July 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) 1.6 μg/m3 (7) 17.0
 
July 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) -0.7 μg/m3 (0) 17.0
 
July 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 3.3 μg/m3 (14) 18.0
 
July 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 6.0 μg/m3 (5) 2.8 μg/m3 (12) 20.0
 
July 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 7.0 μg/m3 (6) 1.9 μg/m3 (8) 19.0
 
July 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 8.0 μg/m3 (7) 1.6 μg/m3 (7) 20.0
 
July 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) 0.4 μg/m3 (2) 21.0
 
July 21, 2019, 1 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) 1.6 μg/m3 (7) 23.0
 
July 21, 2019, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 25.0
 
July 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) -0.7 μg/m3 (0) 25.0
 
July 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) -2.7 μg/m3 (0) 25.0
 
July 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 25.0
 
July 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 23.0
 
July 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 23.0
 
July 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 11.0 μg/m3 (10) 1.3 μg/m3 (5) 22.0
 
July 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 3.6 μg/m3 (15) 20.0
 
July 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
July 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 11.0 μg/m3 (10) 2.3 μg/m3 (10) 22.0
 
July 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 27.0 μg/m3 (25) 3.1 μg/m3 (13) 25.0
 
July 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 32.0 μg/m3 (29) 6.9 μg/m3 (29) 29.0
 
July 20, 2019, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 27.0 μg/m3 (25) 8.1 μg/m3 (34) 34.0
 
July 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 25.0 μg/m3 (23) 6.5 μg/m3 (27) 27.0
 
July 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 28.0 μg/m3 (25) 8.3 μg/m3 (35) 35.0
 
July 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 28.0 μg/m3 (25) 5.3 μg/m3 (22) 25.0
 
July 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 26.0 μg/m3 (24) 2.3 μg/m3 (10) 24.0
 
July 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 23.0 μg/m3 (21) 3.0 μg/m3 (12) 21.0
 
July 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 21.0 μg/m3 (19) 3.3 μg/m3 (14) 19.0
 
July 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 27.0 μg/m3 (25) 4.8 μg/m3 (20) 25.0
 
July 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 27.0 μg/m3 (25) 5.0 μg/m3 (21) 25.0
 
July 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 32.0 μg/m3 (29) 8.6 μg/m3 (36) 36.0
 
July 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 7.8 μg/m3 (32) 32.0
 
July 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 39.0 μg/m3 (35) 8.8 μg/m3 (37) 37.0
 
July 20, 2019, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 10.3 μg/m3 (43) 43.0
 
July 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 41.0 μg/m3 (37) 5.9 μg/m3 (25) 38.0
 
July 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 40.0 μg/m3 (36) 10.5 μg/m3 (44) 44.0
 
July 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 50.0 μg/m3 (45) 11.0 μg/m3 (46) 46.0
 
July 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 42.0 μg/m3 (38) 6.9 μg/m3 (29) 39.0
 
July 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 57.0 μg/m3 (51) 8.5 μg/m3 (35) 51.0
 
July 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 49.0 μg/m3 (45) 9.3 μg/m3 (39) 45.0
 
July 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 44.0 μg/m3 (40) 7.2 μg/m3 (30) 40.0
 
July 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 39.0 μg/m3 (35) 7.6 μg/m3 (32) 35.0
 
July 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 33.0 μg/m3 (30) N/A 30.0
 
July 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 24.0 μg/m3 (22) N/A 22.0
 
July 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A N/A 8.0
 
July 19, 2019, noon N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A N/A 8.0
 
July 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 24.0 μg/m3 (22) 8.6 μg/m3 (36) 36.0
 
July 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 28.0 μg/m3 (25) 8.8 μg/m3 (37) 37.0
 
July 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 24.0 μg/m3 (22) 8.6 μg/m3 (36) 36.0
 
July 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 20.0 μg/m3 (18) 10.3 μg/m3 (43) 43.0
 
July 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 22.0 μg/m3 (20) 6.9 μg/m3 (29) 29.0
 
July 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 19.0 μg/m3 (17) 9.1 μg/m3 (38) 38.0
 
July 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 26.0 μg/m3 (24) 10.8 μg/m3 (45) 45.0
 
July 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 30.0 μg/m3 (27) 9.3 μg/m3 (39) 39.0
 
July 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 29.0 μg/m3 (26) 6.4 μg/m3 (27) 27.0
 
July 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 25.0 μg/m3 (23) 7.2 μg/m3 (30) 30.0
 
July 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 33.0 μg/m3 (30) 7.4 μg/m3 (31) 31.0
 
July 19, 2019, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 39.0 μg/m3 (35) 16.5 μg/m3 (60) 60.0
 
July 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 34.0 μg/m3 (31) 5.7 μg/m3 (24) 35.0
 
July 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 42.0 μg/m3 (38) 6.4 μg/m3 (27) 38.0
 
July 18, 2019, 9 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) 6.7 μg/m3 (28) 35.0
 
July 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 31.0 μg/m3 (28) 6.7 μg/m3 (28) 34.0
 
July 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 31.0 μg/m3 (28) 7.1 μg/m3 (30) 35.0
 
July 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 30.0 μg/m3 (27) 4.7 μg/m3 (20) 34.0
 
July 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 27.0 μg/m3 (25) 4.5 μg/m3 (19) 32.0
 
July 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 22.0 μg/m3 (20) 8.8 μg/m3 (37) 37.0
 
July 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 22.0
 
July 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 9.0 μg/m3 (8) -0.1 μg/m3 (0) 19.0
 
July 18, 2019, 1 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) 1.6 μg/m3 (7) 17.0
 
July 18, 2019, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 7.0 μg/m3 (6) 3.5 μg/m3 (15) 15.0
 
July 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 11.0
 
July 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 16.0
 
July 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 12.0 μg/m3 (11) 6.5 μg/m3 (27) 27.0
 
July 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 14.0 μg/m3 (13) 4.5 μg/m3 (19) 19.0
 
July 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 3.0 μg/m3 (3) -0.3 μg/m3 (0) 20.0
 
July 18, 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) 0.8 μg/m3 (3) 25.0
 
July 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) 1.6 μg/m3 (7) 28.0
 
July 18, 2019, 4 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) 0.1 μg/m3 (0) 27.0
 
July 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 3.0 μg/m3 (3) 1.8 μg/m3 (8) 22.0
 
July 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 3.0 μg/m3 (3) 3.3 μg/m3 (14) 21.0
 
July 18, 2019, 1 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) 3.5 μg/m3 (15) 22.0
 
July 18, 2019, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 9.0 μg/m3 (8) 2.3 μg/m3 (10) 20.0
 
July 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 13.0 μg/m3 (12) 1.6 μg/m3 (7) 27.0
 
July 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 9.0 μg/m3 (8) 0.3 μg/m3 (1) 28.0
 
July 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 9.0 μg/m3 (8) -0.3 μg/m3 (0) 33.0
 
July 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 1.3 μg/m3 (5) 36.0
 
July 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 35.0
 
July 17, 2019, 6 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) 0.9 μg/m3 (4) 34.0
 
July 17, 2019, 5 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) -0.5 μg/m3 (0) 28.0
 
July 17, 2019, 4 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) -1.0 μg/m3 (0) 27.0
 
July 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 29.0
 
July 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) -3.0 μg/m3 (0) 28.0
 
July 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 2.0 μg/m3 (2) -1.5 μg/m3 (0) 31.0
 
July 17, 2019, noon N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 1.8 μg/m3 (8) 36.0
 
July 17, 2019, 11 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) 2.6 μg/m3 (11) 16.0
 
July 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 9.0 μg/m3 (8) 2.3 μg/m3 (10) 14.0
 
July 17, 2019, 9 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) 2.3 μg/m3 (10) 16.0
 
July 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 10.0
 
July 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 7.0 μg/m3 (6) 2.1 μg/m3 (9) 10.0
 
July 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) 2.3 μg/m3 (10) 17.0
 
July 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 4.0 μg/m3 (4) -0.5 μg/m3 (0) 15.0
 
July 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 3.0 μg/m3 (3) 0.1 μg/m3 (0) 11.0
 
July 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 3.5 μg/m3 (15) 18.0
 
July 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 1.6 μg/m3 (7) 18.0
 
July 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 24.0 μg/m3 (22) -2.0 μg/m3 (0) 32.0
 
July 17, 2019, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 10.0 μg/m3 (9) -1.0 μg/m3 (0) 36.0
 
July 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 11.0 μg/m3 (10) -2.0 μg/m3 (0) 38.0
 
July 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 9.0 μg/m3 (8) -0.8 μg/m3 (0) 38.0
 
July 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 9.0 μg/m3 (8) -1.3 μg/m3 (0) 36.0
 
July 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 6.0 μg/m3 (5) -1.0 μg/m3 (0) 37.0
 
July 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 6.0 μg/m3 (5) 0.3 μg/m3 (1) 37.0
 
July 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 38.0
 
July 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 5.0 μg/m3 (5) 2.8 μg/m3 (12) 36.0
 
July 16, 2019, 4 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) 5.0 μg/m3 (21) 28.0
 
July 16, 2019, 3 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) 3.3 μg/m3 (14) 25.0
 
July 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 11.0 μg/m3 (10) 0.9 μg/m3 (4) 22.0
 
July 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 8.0 μg/m3 (7) 1.6 μg/m3 (7) 21.0
 
July 16, 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) 0.6 μg/m3 (2) 26.0
 
July 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 13.0 μg/m3 (12) 2.3 μg/m3 (10) 30.0
 
July 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 12.0 μg/m3 (11) 1.1 μg/m3 (5) 32.0
 
July 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 25.0 μg/m3 (23) -1.0 μg/m3 (0) 23.0
 
July 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 18.0 μg/m3 (16) 1.3 μg/m3 (5) 16.0
 
July 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 23.0 μg/m3 (21) 2.6 μg/m3 (11) 21.0
 
July 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 19.0 μg/m3 (17) 4.0 μg/m3 (17) 17.0
 
July 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 23.0 μg/m3 (21) 5.3 μg/m3 (22) 22.0
 
July 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 20.0 μg/m3 (18) 3.8 μg/m3 (16) 18.0
 
July 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 26.0 μg/m3 (24) 5.5 μg/m3 (23) 24.0
 
July 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 28.0 μg/m3 (25) 6.2 μg/m3 (26) 26.0
 
July 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 29.0 μg/m3 (26) 7.6 μg/m3 (32) 32.0
 
July 16, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 52.0 μg/m3 (47) 7.2 μg/m3 (30) 47.0
 
July 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 30.0 μg/m3 (27) 8.1 μg/m3 (34) 34.0
 
July 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 43.0 μg/m3 (39) 6.0 μg/m3 (25) 39.0
 
July 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 27.0 μg/m3 (25) 5.7 μg/m3 (24) 35.0
 
July 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 38.0 μg/m3 (35) 7.6 μg/m3 (32) 35.0
 
July 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 30.0 μg/m3 (27) 7.6 μg/m3 (32) 34.0
 
July 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 27.0 μg/m3 (25) 4.3 μg/m3 (18) 32.0
 
July 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 33.0 μg/m3 (30) 4.8 μg/m3 (20) 30.0
 
July 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 28.0 μg/m3 (25) 4.0 μg/m3 (17) 26.0
 
July 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 21.0 μg/m3 (19) 1.8 μg/m3 (8) 22.0
 
July 15, 2019, 2 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) 4.8 μg/m3 (20) 20.0
 
July 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 21.0 μg/m3 (19) 7.8 μg/m3 (32) 32.0
 
July 15, 2019, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 18.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
July 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 24.0 μg/m3 (22) 8.3 μg/m3 (35) 35.0
 
July 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 17.0 μg/m3 (15) 7.6 μg/m3 (32) 32.0
 
July 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 13.0 μg/m3 (12) 10.1 μg/m3 (42) 42.0
 
July 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 20.0 μg/m3 (18) 5.3 μg/m3 (22) 22.0
 
July 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 20.0 μg/m3 (18) 8.1 μg/m3 (34) 34.0
 
July 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 18.0 μg/m3 (16) 9.1 μg/m3 (38) 38.0
 
July 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 22.0 μg/m3 (20) 10.1 μg/m3 (42) 42.0
 
July 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 20.0 μg/m3 (18) 4.5 μg/m3 (19) 24.0
 
July 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 23.0 μg/m3 (21) 6.7 μg/m3 (28) 29.0
 
July 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 25.0 μg/m3 (23) 11.6 μg/m3 (48) 48.0
 
July 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 27.0 μg/m3 (25) 8.3 μg/m3 (35) 35.0
 
July 15, 2019, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 24.0 μg/m3 (22) 8.1 μg/m3 (34) 35.0
 
July 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 16.0 μg/m3 (15) 4.3 μg/m3 (18) 37.0
 
July 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 30.0 μg/m3 (27) 5.5 μg/m3 (23) 39.0
 
July 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 24.0 μg/m3 (22) 4.0 μg/m3 (17) 39.0
 
July 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 24.0 μg/m3 (22) 4.0 μg/m3 (17) 39.0
 
July 14, 2019, 7 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) 4.7 μg/m3 (20) 38.0
 
July 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 24.0 μg/m3 (22) 3.8 μg/m3 (16) 37.0
 
July 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 23.0 μg/m3 (21) 5.7 μg/m3 (24) 35.0
 
July 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 16.0 μg/m3 (15) 7.8 μg/m3 (32) 34.0
 
July 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 19.0 μg/m3 (17) 4.0 μg/m3 (17) 30.0
 
July 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 19.0 μg/m3 (17) 6.7 μg/m3 (28) 28.0
 
July 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 21.0 μg/m3 (19) 4.1 μg/m3 (17) 19.0
 
July 14, 2019, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 18.0 μg/m3 (16) 5.7 μg/m3 (24) 24.0