AQSQID: 460330132

Site Name: Wind Cave

Location: Custer Co, SD

Reporting: True, Located: True

Current AQI: 38.0

Custer Co SD, US: 43.557613, -103.483658

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 1.2 μg/m3 (5) 38.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 0.2 μg/m3 (1) 38.0
 
Sept. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 2.2 μg/m3 (9) 36.0
 
Sept. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.6 μg/m3 (15) 36.0
 
Sept. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
Sept. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.9 μg/m3 (8) 36.0
 
Sept. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 2.2 μg/m3 (9) 35.0
 
Sept. 17, 2019, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.1 μg/m3 (13) 35.0
 
Sept. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
Sept. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 2.9 μg/m3 (12) 35.0
 
Sept. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 2.6 μg/m3 (11) 38.0
 
Sept. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.3 μg/m3 (18) 40.0
 
Sept. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
Sept. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.5 μg/m3 (15) 40.0
 
Sept. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.4 μg/m3 (14) 38.0
 
Sept. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.2 μg/m3 (13) 34.0
 
Sept. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 3.2 μg/m3 (13) 37.0
 
Sept. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 3.4 μg/m3 (14) 37.0
 
Sept. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.4 μg/m3 (14) 40.0
 
Sept. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 2.7 μg/m3 (11) 44.0
 
Sept. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 2.7 μg/m3 (11) 42.0
 
Sept. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 3.3 μg/m3 (14) 42.0
 
Sept. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 3.1 μg/m3 (13) 42.0
 
Sept. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 1.2 μg/m3 (5) 42.0
 
Sept. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 1.7 μg/m3 (7) 41.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 1.4 μg/m3 (6) 38.0
 
Sept. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.4 μg/m3 (6) 36.0
 
Sept. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 2.7 μg/m3 (11) 36.0
 
Sept. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.5 μg/m3 (19) 35.0
 
Sept. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.8 μg/m3 (16) 28.0
 
Sept. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 3.2 μg/m3 (13) 30.0
 
Sept. 16, 2019, noon N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.9 μg/m3 (12) 32.0
 
Sept. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.2 μg/m3 (13) 32.0
 
Sept. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.8 μg/m3 (16) 32.0
 
Sept. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A -0.4 μg/m3 (0) 31.0
 
Sept. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A -0.7 μg/m3 (0) 34.0
 
Sept. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 0.4 μg/m3 (2) 35.0
 
Sept. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 0.5 μg/m3 (2) 37.0
 
Sept. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.6 μg/m3 (15) 38.0
 
Sept. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.2 μg/m3 (13) 38.0
 
Sept. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A -0.2 μg/m3 (0) 40.0
 
Sept. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 0.2 μg/m3 (1) 41.0
 
Sept. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
Sept. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 1.7 μg/m3 (7) 40.0
 
Sept. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 1.2 μg/m3 (5) 41.0
 
Sept. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 1.4 μg/m3 (6) 42.0
 
Sept. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 0.2 μg/m3 (1) 43.0
 
Sept. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A -0.2 μg/m3 (0) 43.0
 
Sept. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 0.2 μg/m3 (1) 42.0
 
Sept. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A -0.5 μg/m3 (0) 42.0
 
Sept. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 0.4 μg/m3 (2) 41.0
 
Sept. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.4 μg/m3 (10) 39.0
 
Sept. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
Sept. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
Sept. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 2.1 μg/m3 (9) 33.0
 
Sept. 15, 2019, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 3.1 μg/m3 (13) 30.0
 
Sept. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 5.2 μg/m3 (22) 32.0
 
Sept. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.1 μg/m3 (13) 34.0
 
Sept. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A -0.5 μg/m3 (0) 37.0
 
Sept. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A -2.4 μg/m3 (0) 37.0
 
Sept. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.9 μg/m3 (8) 36.0
 
Sept. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.1 μg/m3 (13) 35.0
 
Sept. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 1.4 μg/m3 (6) 32.0
 
Sept. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 2.9 μg/m3 (12) 33.0
 
Sept. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 2.4 μg/m3 (10) 33.0
 
Sept. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.3 μg/m3 (18) 34.0
 
Sept. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.4 μg/m3 (14) 35.0
 
Sept. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 1.7 μg/m3 (7) 37.0
 
Sept. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 1.2 μg/m3 (5) 42.0
 
Sept. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 0.9 μg/m3 (4) 42.0
 
Sept. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A -0.2 μg/m3 (0) 39.0
 
Sept. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 0.4 μg/m3 (2) 38.0
 
Sept. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 0.0 μg/m3 (0) 37.0
 
Sept. 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A -0.7 μg/m3 (0) 35.0
 
Sept. 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 0.0 μg/m3 (0) 32.0
 
Sept. 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 0.0 μg/m3 (0) 32.0
 
Sept. 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A -1.4 μg/m3 (0) 31.0
 
Sept. 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 0.4 μg/m3 (2) 32.0
 
Sept. 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 2.9 μg/m3 (12) 33.0
 
Sept. 14, 2019, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.2 μg/m3 (13) 34.0
 
Sept. 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 2.7 μg/m3 (11) 34.0
 
Sept. 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 0.9 μg/m3 (4) 34.0
 
Sept. 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
Sept. 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 2.2 μg/m3 (9) 37.0
 
Sept. 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.7 μg/m3 (7) 36.0
 
Sept. 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 2.7 μg/m3 (11) 35.0
 
Sept. 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 1.7 μg/m3 (7) 35.0
 
Sept. 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 1.2 μg/m3 (5) 35.0
 
Sept. 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 1.4 μg/m3 (6) 33.0
 
Sept. 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.5 μg/m3 (10) 32.0
 
Sept. 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 1.9 μg/m3 (8) 32.0
 
Sept. 14, 2019, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A -1.2 μg/m3 (0) 33.0
 
Sept. 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -1.7 μg/m3 (0) N/A
Sept. 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -0.2 μg/m3 (0) N/A
Sept. 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A -1.4 μg/m3 (0) 34.0
 
Sept. 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A -2.9 μg/m3 (0) 33.0
 
Sept. 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A -1.4 μg/m3 (0) 33.0
 
Sept. 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A -0.4 μg/m3 (0) 32.0
 
Sept. 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 1.7 μg/m3 (7) 29.0
 
Sept. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.2 μg/m3 (13) 28.0
 
Sept. 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 1.7 μg/m3 (7) 25.0
 
Sept. 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 1.9 μg/m3 (8) 25.0
 
Sept. 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 3.8 μg/m3 (16) 18.0
 
Sept. 13, 2019, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 4.5 μg/m3 (19) 20.0
 
Sept. 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 0.9 μg/m3 (4) 22.0
 
Sept. 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
Sept. 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 3.4 μg/m3 (14) 22.0
 
Sept. 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 2.4 μg/m3 (10) 20.0
 
Sept. 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 2.7 μg/m3 (11) 21.0
 
Sept. 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 3.4 μg/m3 (14) 21.0
 
Sept. 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
Sept. 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.5 μg/m3 (15) 22.0
 
Sept. 13, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.4 μg/m3 (14) 22.0
 
Sept. 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
Sept. 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
Sept. 13, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 2.2 μg/m3 (9) 25.0
 
Sept. 12, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 3.1 μg/m3 (13) 22.0
 
Sept. 12, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 3.4 μg/m3 (14) 18.0
 
Sept. 12, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 0.6 μg/m3 (2) 25.0
 
Sept. 12, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A -0.5 μg/m3 (0) 29.0
 
Sept. 12, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 0.4 μg/m3 (2) 27.0
 
Sept. 12, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 0.9 μg/m3 (4) 25.0
 
Sept. 12, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 1.7 μg/m3 (7) 18.0
 
Sept. 12, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 1.9 μg/m3 (8) 18.0
 
Sept. 12, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A -1.4 μg/m3 (0) 18.0
 
Sept. 12, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A -0.7 μg/m3 (0) 16.0
 
Sept. 12, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 0.0 μg/m3 (0) 15.0
 
Sept. 12, 2019, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A -0.3 μg/m3 (0) 15.0
 
Sept. 12, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 0.7 μg/m3 (3) 15.0
 
Sept. 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 0.2 μg/m3 (1) 15.0
 
Sept. 12, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 0.9 μg/m3 (4) 15.0
 
Sept. 12, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 0.0 μg/m3 (0) 14.0
 
Sept. 12, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A -0.2 μg/m3 (0) 15.0
 
Sept. 12, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A -0.2 μg/m3 (0) 24.0
 
Sept. 12, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A -1.2 μg/m3 (0) 24.0
 
Sept. 12, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 0.9 μg/m3 (4) 24.0
 
Sept. 12, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A -0.5 μg/m3 (0) 25.0
 
Sept. 12, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A -0.5 μg/m3 (0) 25.0
 
Sept. 12, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 0.2 μg/m3 (1) 21.0
 
Sept. 12, 2019, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.4 μg/m3 (6) 21.0
 
Sept. 11, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
Sept. 11, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.4 μg/m3 (6) 22.0
 
Sept. 11, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 1.9 μg/m3 (8) 19.0
 
Sept. 11, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 2.6 μg/m3 (11) 23.0
 
Sept. 11, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 23.0
 
Sept. 11, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 4.0 μg/m3 (4) -0.7 μg/m3 (0) 21.0
 
Sept. 11, 2019, 5 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) -0.7 μg/m3 (0) 20.0
 
Sept. 11, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 4.0 μg/m3 (4) 2.7 μg/m3 (11) 19.0
 
Sept. 11, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 6.0 μg/m3 (5) 2.9 μg/m3 (12) 20.0
 
Sept. 11, 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) 3.7 μg/m3 (15) 19.0
 
Sept. 11, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2019, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 18.0
 
Sept. 11, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (11) 19.0
 
Sept. 11, 2019, 10 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) 1.9 μg/m3 (8) 21.0
 
Sept. 11, 2019, 9 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) 3.3 μg/m3 (14) 22.0
 
Sept. 11, 2019, 8 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) 1.6 μg/m3 (7) 26.0
 
Sept. 11, 2019, 7 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) 1.9 μg/m3 (8) 24.0
 
Sept. 11, 2019, 6 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) 5.5 μg/m3 (23) 26.0
 
Sept. 11, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 25.0
 
Sept. 11, 2019, 4 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) 4.5 μg/m3 (19) 23.0
 
Sept. 11, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 10.0 μg/m3 (9) 3.6 μg/m3 (15) 24.0
 
Sept. 11, 2019, 2 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) 3.5 μg/m3 (15) 25.0
 
Sept. 11, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 9.0 μg/m3 (8) 2.4 μg/m3 (10) 23.0
 
Sept. 11, 2019, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 3.1 μg/m3 (13) 24.0
 
Sept. 10, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 2.4 μg/m3 (10) 25.0
 
Sept. 10, 2019, 10 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) 0.7 μg/m3 (3) 25.0
 
Sept. 10, 2019, 9 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) 0.4 μg/m3 (2) 27.0
 
Sept. 10, 2019, 8 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) 0.2 μg/m3 (1) 29.0