AQSQID: 460990008

Site Name: Sioux Falls

Location: Sioux Falls, SD

Reporting: True, Located: True

Current AQI: 34.0

Sioux Falls SD, US: 43.54792, -96.700768

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 4 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) 2.2 μg/m3 (9) 34.0
 
March 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 20.0 μg/m3 (18) 3.9 μg/m3 (16) 30.0
 
March 23, 2019, 2 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) 4.4 μg/m3 (18) 28.0
 
March 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 25.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 0.3 μg/m3 (1) 25.0
 
March 23, 2019, 11 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) -0.1 μg/m3 (0) 25.0
 
March 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 1.0 μg/m3 (4) 26.0
 
March 23, 2019, 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) 3.0 μg/m3 (12) 24.0
 
March 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 4.2 μg/m3 (18) 24.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 2.5 μg/m3 (10) 24.0
 
March 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 1.3 μg/m3 (5) 26.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 27.0
 
March 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (4) 27.0
 
March 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 2.2 μg/m3 (9) 27.0
 
March 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 28.0
 
March 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 14.0 μg/m3 (13) 3.9 μg/m3 (16) 29.0
 
March 23, 2019, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 16.0 μg/m3 (15) 2.0 μg/m3 (8) 35.0
 
March 22, 2019, 11 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 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 19.0 μg/m3 (17) 0.8 μg/m3 (3) 39.0
 
March 22, 2019, 9 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) -2.0 μg/m3 (0) 38.0
 
March 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 14.0 μg/m3 (13) 0.8 μg/m3 (3) 38.0
 
March 22, 2019, 7 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) 0.8 μg/m3 (3) 37.0
 
March 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 10.0 μg/m3 (9) -1.7 μg/m3 (0) 36.0
 
March 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 13.0 μg/m3 (12) 1.1 μg/m3 (5) 34.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.2 μg/m3 (13) 33.0
 
March 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 14.0 μg/m3 (13) 1.7 μg/m3 (7) 27.0
 
March 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 14.0 μg/m3 (13) 4.9 μg/m3 (20) 22.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 1.7 μg/m3 (7) 18.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 9.0 μg/m3 (8) 5.6 μg/m3 (23) 23.0
 
March 22, 2019, 10 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) 8.5 μg/m3 (35) 35.0
 
March 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 7.0 μg/m3 (6) 4.4 μg/m3 (18) 30.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 12.0 μg/m3 (11) 5.4 μg/m3 (23) 30.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) 5.6 μg/m3 (23) 29.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 11.0 μg/m3 (10) 5.9 μg/m3 (25) 27.0
 
March 22, 2019, 5 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) 4.6 μg/m3 (19) 25.0
 
March 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 6.6 μg/m3 (28) 28.0
 
March 22, 2019, 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) 6.8 μg/m3 (28) 28.0
 
March 22, 2019, 2 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) 8.5 μg/m3 (35) 35.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 25.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 4.7 μg/m3 (20) 33.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 11.0 μg/m3 (10) 0.6 μg/m3 (2) 38.0
 
March 21, 2019, 10 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) -1.3 μg/m3 (0) 40.0
 
March 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 16.0 μg/m3 (15) 0.4 μg/m3 (2) 42.0
 
March 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 13.0 μg/m3 (12) 3.0 μg/m3 (12) 40.0
 
March 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 19.0 μg/m3 (17) 4.2 μg/m3 (18) 38.0
 
March 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 19.0 μg/m3 (17) 3.2 μg/m3 (13) 37.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 20.0 μg/m3 (18) 3.0 μg/m3 (12) 35.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 39.0 μg/m3 (35) 0.6 μg/m3 (2) 35.0
 
March 21, 2019, 3 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) -1.0 μg/m3 (0) 28.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 13.0 μg/m3 (12) 0.6 μg/m3 (2) 25.0
 
March 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 11.0 μg/m3 (10) 4.2 μg/m3 (18) 18.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 10.0 μg/m3 (9) 5.4 μg/m3 (23) 23.0
 
March 21, 2019, 11 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) 0.8 μg/m3 (3) 23.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 2.2 μg/m3 (9) 25.0
 
March 21, 2019, 9 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) 5.1 μg/m3 (21) 25.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 12.0 μg/m3 (11) 8.5 μg/m3 (35) 35.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 4.7 μg/m3 (20) 28.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 11.0 μg/m3 (10) 4.4 μg/m3 (18) 31.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 9.0 μg/m3 (8) 4.9 μg/m3 (20) 33.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 13.0 μg/m3 (12) 10.5 μg/m3 (44) 44.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 6.8 μg/m3 (28) 32.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 35.0
 
March 21, 2019, 1 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) 3.5 μg/m3 (15) 36.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 38.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) 1.1 μg/m3 (5) 38.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 11.0 μg/m3 (10) 1.3 μg/m3 (5) 38.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 15.0 μg/m3 (14) 0.8 μg/m3 (3) 38.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 15.0 μg/m3 (14) 2.7 μg/m3 (11) 40.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 13.0 μg/m3 (12) 5.2 μg/m3 (22) 40.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 12.0 μg/m3 (11) 4.2 μg/m3 (18) 38.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 13.0 μg/m3 (12) 1.3 μg/m3 (5) 36.0
 
March 20, 2019, 4 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) -0.3 μg/m3 (0) 33.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 11.0 μg/m3 (10) -0.8 μg/m3 (0) 31.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 8.0 μg/m3 (7) 1.5 μg/m3 (6) 26.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) 5.8 μg/m3 (24) 24.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 18.0 μg/m3 (16) 8.3 μg/m3 (35) 35.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 8.0 μg/m3 (7) 7.5 μg/m3 (31) 31.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 9.0 μg/m3 (8) 9.5 μg/m3 (40) 40.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 12.0 μg/m3 (11) 12.1 μg/m3 (50) 50.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 12.0 μg/m3 (11) 9.7 μg/m3 (40) 40.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 13.0 μg/m3 (12) 13.3 μg/m3 (53) 53.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 18.0 μg/m3 (16) 11.3 μg/m3 (47) 47.0
 
March 20, 2019, 4 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) 9.7 μg/m3 (40) 40.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 11.0 μg/m3 (10) 9.2 μg/m3 (38) 38.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 9.0 μg/m3 (8) 9.7 μg/m3 (40) 40.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 4.0 μg/m3 (4) 8.5 μg/m3 (35) 35.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 1.0 μg/m3 (1) 2.7 μg/m3 (11) 11.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 5.0 μg/m3 (5) 2.3 μg/m3 (10) 10.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 9.0 μg/m3 (8) -2.2 μg/m3 (0) 10.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 38.0 μg/m3 (35) 2.5 μg/m3 (10) 35.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.4 μg/m3 (27) 27.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A N/A 35.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 18.0 μg/m3 (16) 3.7 μg/m3 (15) 32.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 19.0 μg/m3 (17) 3.2 μg/m3 (13) 28.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 19.0 μg/m3 (17) 3.7 μg/m3 (15) 27.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 15.0 μg/m3 (14) 5.6 μg/m3 (23) 25.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 17.0 μg/m3 (15) 3.4 μg/m3 (14) 24.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 7.0 μg/m3 (6) 4.2 μg/m3 (18) 19.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 8.0 μg/m3 (7) 5.4 μg/m3 (23) 23.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 12.0 μg/m3 (11) 0.1 μg/m3 (0) 24.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 1.3 μg/m3 (5) 26.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 1.7 μg/m3 (7) 27.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 27.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 8.0 μg/m3 (7) 2.0 μg/m3 (8) 28.0
 
March 19, 2019, 6 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) 0.0 μg/m3 (0) 28.0
 
March 19, 2019, 5 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) 0.5 μg/m3 (2) 28.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) -0.3 μg/m3 (0) 30.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 0.3 μg/m3 (1) 30.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) -0.3 μg/m3 (0) 29.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) -0.1 μg/m3 (0) 31.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 0.8 μg/m3 (3) 33.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 6.0 μg/m3 (5) -1.2 μg/m3 (0) 36.0
 
March 18, 2019, 10 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) -2.7 μg/m3 (0) 36.0
 
March 18, 2019, 9 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) 2.0 μg/m3 (8) 38.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 28.0 μg/m3 (25) 4.2 μg/m3 (18) 38.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A -4.0 μg/m3 (0) 1.3 μg/m3 (5) 39.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 13.0 μg/m3 (12) 4.0 μg/m3 (17) 39.0
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 17.0 μg/m3 (15) 4.7 μg/m3 (20) 40.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 20.0 μg/m3 (18) 7.3 μg/m3 (30) 40.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 23.0 μg/m3 (21) 12.6 μg/m3 (51) 51.0
 
March 18, 2019, 2 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) 11.1 μg/m3 (46) 46.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 17.0 μg/m3 (15) 9.7 μg/m3 (40) 40.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 13.0 μg/m3 (12) 10.2 μg/m3 (42) 42.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 12.0 μg/m3 (11) 7.8 μg/m3 (32) 32.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 11.0 μg/m3 (10) 6.6 μg/m3 (28) 34.0
 
March 18, 2019, 9 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) 7.3 μg/m3 (30) 34.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 9.0 μg/m3 (8) 6.3 μg/m3 (26) 36.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 12.0 μg/m3 (11) 5.1 μg/m3 (21) 39.0
 
March 18, 2019, 6 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) 7.5 μg/m3 (31) 40.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 13.0 μg/m3 (12) 9.5 μg/m3 (40) 40.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 11.0 μg/m3 (10) 5.6 μg/m3 (23) 39.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 10.0 μg/m3 (9) 3.7 μg/m3 (15) 38.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (18) 40.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 3.0 μg/m3 (3) 6.1 μg/m3 (25) 41.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 2.0 μg/m3 (2) 6.1 μg/m3 (25) 41.0
 
March 17, 2019, 11 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) 4.7 μg/m3 (20) 42.0
 
March 17, 2019, 10 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) 2.5 μg/m3 (10) 42.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 43.0
 
March 17, 2019, 8 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) 6.9 μg/m3 (29) 45.0
 
March 17, 2019, 7 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) 4.7 μg/m3 (20) 43.0
 
March 17, 2019, 6 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) 4.7 μg/m3 (20) 39.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 13.0 μg/m3 (12) 6.8 μg/m3 (28) 38.0
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 12.0 μg/m3 (11) 7.1 μg/m3 (30) 38.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 15.0 μg/m3 (14) 7.3 μg/m3 (30) 37.0
 
March 17, 2019, 2 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) 8.3 μg/m3 (35) 37.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 11.0 μg/m3 (10) 11.1 μg/m3 (46) 46.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 8.0 μg/m3 (7) 10.9 μg/m3 (45) 45.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 12.0 μg/m3 (11) 8.7 μg/m3 (36) 38.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 39.0
 
March 17, 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) 7.3 μg/m3 (30) 42.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 6.0 μg/m3 (5) 5.1 μg/m3 (21) 40.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 7.0 μg/m3 (6) 5.4 μg/m3 (23) 40.0
 
March 17, 2019, 6 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) 3.7 μg/m3 (15) 38.0
 
March 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 5.0 μg/m3 (5) 3.2 μg/m3 (13) 36.0
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 8.0 μg/m3 (7) 0.3 μg/m3 (1) 33.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 4.9 μg/m3 (20) 34.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 9.7 μg/m3 (40) 40.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 8.0 μg/m3 (33) 34.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 8.0 μg/m3 (7) 7.1 μg/m3 (30) 38.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 9.0 μg/m3 (8) 5.1 μg/m3 (21) 39.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 14.0 μg/m3 (13) 8.8 μg/m3 (37) 38.0
 
March 16, 2019, 9 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) 10.9 μg/m3 (45) 45.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 10.0 μg/m3 (9) 7.3 μg/m3 (30) 34.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 9.0 μg/m3 (8) 5.9 μg/m3 (25) 32.0
 
March 16, 2019, 6 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) 2.0 μg/m3 (8) 32.0
 
March 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 11.0 μg/m3 (10) 3.2 μg/m3 (13) 31.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 9.0 μg/m3 (8) 2.7 μg/m3 (11) 32.0