AQSQID: 460330132

Site Name: Wind Cave

Location: Custer Co, SD

Reporting: True, Located: True

Current AQI: 15.0

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
Jan. 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 4.0 μg/m3 (4) 1.2 μg/m3 (5) 15.0
 
Jan. 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 2.0 μg/m3 (2) 0.7 μg/m3 (3) 15.0
 
Jan. 21, 2019, 4 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) -1.0 μg/m3 (0) 25.0
 
Jan. 21, 2019, 3 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) 2.4 μg/m3 (10) 23.0
 
Jan. 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 20.0
 
Jan. 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 18.0
 
Jan. 21, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 18.0
 
Jan. 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 6.0 μg/m3 (5) 2.2 μg/m3 (9) 21.0
 
Jan. 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 2.4 μg/m3 (10) 22.0
 
Jan. 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 0.7 μg/m3 (3) 22.0
 
Jan. 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 4.0 μg/m3 (4) -1.2 μg/m3 (0) 20.0
 
Jan. 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 4.0 μg/m3 (4) -0.2 μg/m3 (0) 20.0
 
Jan. 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) -0.5 μg/m3 (0) 22.0
 
Jan. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) -0.7 μg/m3 (0) 24.0
 
Jan. 21, 2019, 4 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
 
Jan. 21, 2019, 3 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) -0.2 μg/m3 (0) 25.0
 
Jan. 21, 2019, 2 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) -0.5 μg/m3 (0) 25.0
 
Jan. 21, 2019, 1 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) -0.5 μg/m3 (0) 22.0
 
Jan. 21, 2019, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) -0.5 μg/m3 (0) 24.0
 
Jan. 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 24.0
 
Jan. 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 2.0 μg/m3 (2) 2.9 μg/m3 (12) 26.0
 
Jan. 20, 2019, 9 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) 4.5 μg/m3 (19) 28.0
 
Jan. 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 4.0 μg/m3 (4) 1.2 μg/m3 (5) 30.0
 
Jan. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) -0.2 μg/m3 (0) 28.0
 
Jan. 20, 2019, 6 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) 0.0 μg/m3 (0) 28.0
 
Jan. 20, 2019, 5 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) 0.7 μg/m3 (3) 29.0
 
Jan. 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 30.0
 
Jan. 20, 2019, 3 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) -0.9 μg/m3 (0) 29.0
 
Jan. 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) -0.9 μg/m3 (0) 30.0
 
Jan. 20, 2019, 1 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) -0.7 μg/m3 (0) 28.0
 
Jan. 20, 2019, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 25.0
 
Jan. 20, 2019, 11 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) 2.9 μg/m3 (12) 25.0
 
Jan. 20, 2019, 10 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) 1.7 μg/m3 (7) 25.0
 
Jan. 20, 2019, 9 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) 1.9 μg/m3 (8) 26.0
 
Jan. 20, 2019, 8 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) 0.2 μg/m3 (1) 26.0
 
Jan. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) -0.4 μg/m3 (0) 27.0
 
Jan. 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 16.0 μg/m3 (15) 2.2 μg/m3 (9) 26.0
 
Jan. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 15.0 μg/m3 (14) 1.9 μg/m3 (8) 26.0
 
Jan. 20, 2019, 4 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) 0.2 μg/m3 (1) 26.0
 
Jan. 20, 2019, 3 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) 0.2 μg/m3 (1) 27.0
 
Jan. 20, 2019, 2 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) 0.9 μg/m3 (4) 25.0
 
Jan. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 1.9 μg/m3 (8) 25.0
 
Jan. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) 3.5 μg/m3 (15) 27.0
 
Jan. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 2.7 μg/m3 (11) 28.0
 
Jan. 19, 2019, 10 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) 2.2 μg/m3 (9) 28.0
 
Jan. 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) -1.0 μg/m3 (0) 28.0
 
Jan. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) -0.5 μg/m3 (0) 24.0
 
Jan. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 1.0 μg/m3 (1) 1.7 μg/m3 (7) 24.0
 
Jan. 19, 2019, 6 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) -0.5 μg/m3 (0) 23.0
 
Jan. 19, 2019, 5 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) 2.4 μg/m3 (10) 22.0
 
Jan. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 4.5 μg/m3 (19) 22.0
 
Jan. 19, 2019, 3 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) 0.7 μg/m3 (3) 23.0
 
Jan. 19, 2019, 2 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) 2.4 μg/m3 (10) 24.0
 
Jan. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 3.3 μg/m3 (14) 21.0
 
Jan. 19, 2019, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 5.5 μg/m3 (23) 23.0
 
Jan. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 10.0 μg/m3 (9) 7.5 μg/m3 (31) 31.0
 
Jan. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 12.0 μg/m3 (11) 7.5 μg/m3 (31) 31.0
 
Jan. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 12.0 μg/m3 (11) 8.7 μg/m3 (36) 36.0
 
Jan. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 11.0 μg/m3 (10) 8.7 μg/m3 (36) 36.0
 
Jan. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 10.0 μg/m3 (9) 7.5 μg/m3 (31) 31.0
 
Jan. 19, 2019, 5 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) 6.2 μg/m3 (26) 26.0
 
Jan. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 10.0 μg/m3 (9) 8.4 μg/m3 (35) 35.0
 
Jan. 19, 2019, 3 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) 7.7 μg/m3 (32) 32.0
 
Jan. 19, 2019, 2 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) 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 1 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) 7.9 μg/m3 (33) 33.0
 
Jan. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 8.9 μg/m3 (37) 37.0
 
Jan. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 8.0 μg/m3 (7) 9.1 μg/m3 (38) 38.0
 
Jan. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 6.2 μg/m3 (26) 26.0
 
Jan. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 8.6 μg/m3 (36) 36.0
 
Jan. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 9.9 μg/m3 (41) 41.0
 
Jan. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 4.0 μg/m3 (4) 7.2 μg/m3 (30) 30.0
 
Jan. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 0.0 μg/m3 (0) 7.9 μg/m3 (33) 33.0
 
Jan. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A -1.0 μg/m3 (0) 4.5 μg/m3 (19) 19.0
 
Jan. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 13.0
 
Jan. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 18.0
 
Jan. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 3.0 μg/m3 (3) 4.5 μg/m3 (19) 19.0
 
Jan. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 2.0 μg/m3 (2) 1.6 μg/m3 (7) 11.0
 
Jan. 18, 2019, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 2.0 μg/m3 (2) 1.6 μg/m3 (7) 12.0
 
Jan. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 11.0
 
Jan. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 4.0 μg/m3 (4) 0.4 μg/m3 (2) 11.0
 
Jan. 18, 2019, 9 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) 1.2 μg/m3 (5) 11.0
 
Jan. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 5.0 μg/m3 (5) 1.7 μg/m3 (7) 12.0
 
Jan. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 11.0
 
Jan. 18, 2019, 6 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) 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 4.0 μg/m3 (4) 5.2 μg/m3 (22) 22.0
 
Jan. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 7.0 μg/m3 (6) 1.4 μg/m3 (6) 11.0
 
Jan. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 7.0 μg/m3 (6) 3.1 μg/m3 (13) 13.0
 
Jan. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 6.0 μg/m3 (5) 5.7 μg/m3 (24) 24.0
 
Jan. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 4.0 μg/m3 (4) 4.3 μg/m3 (18) 18.0
 
Jan. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 22.0
 
Jan. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 17.0
 
Jan. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 0.2 μg/m3 (1) 18.0
 
Jan. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) N/A 21.0
 
Jan. 17, 2019, 6 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) 0.9 μg/m3 (4) 31.0
 
Jan. 17, 2019, 5 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) 0.9 μg/m3 (4) 31.0
 
Jan. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 3.0 μg/m3 (3) -2.2 μg/m3 (0) 30.0
 
Jan. 17, 2019, 3 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) -1.2 μg/m3 (0) 28.0
 
Jan. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 31.0
 
Jan. 17, 2019, 1 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) 2.2 μg/m3 (9) 29.0
 
Jan. 17, 2019, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) 2.7 μg/m3 (11) 29.0
 
Jan. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 5.0 μg/m3 (5) 0.9 μg/m3 (4) 31.0
 
Jan. 17, 2019, 10 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) 0.9 μg/m3 (4) 28.0
 
Jan. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 1.9 μg/m3 (8) 26.0
 
Jan. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 3.8 μg/m3 (16) 31.0
 
Jan. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 5.5 μg/m3 (23) 31.0
 
Jan. 17, 2019, 6 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) 5.0 μg/m3 (21) 22.0
 
Jan. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 1.0 μg/m3 (1) 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 3.0 μg/m3 (3) 5.2 μg/m3 (22) 22.0
 
Jan. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 4.0 μg/m3 (4) 7.2 μg/m3 (30) 30.0
 
Jan. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 8.0 μg/m3 (7) 6.5 μg/m3 (27) 27.0
 
Jan. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 12.0 μg/m3 (11) 7.7 μg/m3 (32) 32.0
 
Jan. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 10.0 μg/m3 (9) 6.5 μg/m3 (27) 27.0
 
Jan. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 9.0 μg/m3 (8) 9.4 μg/m3 (39) 39.0
 
Jan. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 13.0 μg/m3 (12) 6.2 μg/m3 (26) 26.0
 
Jan. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 11.0 μg/m3 (10) 5.7 μg/m3 (24) 24.0
 
Jan. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 7.0 μg/m3 (6) 6.2 μg/m3 (26) 26.0
 
Jan. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
Jan. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 3.3 μg/m3 (14) 14.0
 
Jan. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 6.0 μg/m3 (5) 4.5 μg/m3 (19) 19.0
 
Jan. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 4.3 μg/m3 (18) 18.0
 
Jan. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 5.0 μg/m3 (5) 2.4 μg/m3 (10) 15.0
 
Jan. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 1.7 μg/m3 (7) 15.0
 
Jan. 16, 2019, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 15.0
 
Jan. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 1.4 μg/m3 (6) 17.0
 
Jan. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 4.0 μg/m3 (4) 0.7 μg/m3 (3) 17.0
 
Jan. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 6.0 μg/m3 (5) 0.9 μg/m3 (4) 17.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 2.0 μg/m3 (2) 3.5 μg/m3 (15) 18.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 3.8 μg/m3 (16) 18.0
 
Jan. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 17.0
 
Jan. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 2.0 μg/m3 (2) 0.9 μg/m3 (4) 19.0
 
Jan. 16, 2019, 4 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) 3.6 μg/m3 (15) 23.0
 
Jan. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 5.0 μg/m3 (5) 4.1 μg/m3 (17) 24.0
 
Jan. 16, 2019, 2 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
 
Jan. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 1.0 μg/m3 (1) 1.9 μg/m3 (8) 25.0
 
Jan. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 0.7 μg/m3 (3) 26.0
 
Jan. 15, 2019, 11 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) 2.9 μg/m3 (12) 28.0
 
Jan. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 8.0 μg/m3 (7) 3.3 μg/m3 (14) 28.0
 
Jan. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) 0.7 μg/m3 (3) 29.0
 
Jan. 15, 2019, 8 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) 1.7 μg/m3 (7) 31.0
 
Jan. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (7) 32.0
 
Jan. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 32.0
 
Jan. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 5.0 μg/m3 (5) 1.7 μg/m3 (7) 32.0
 
Jan. 15, 2019, 4 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) 1.4 μg/m3 (6) 31.0
 
Jan. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) 0.7 μg/m3 (3) 30.0
 
Jan. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) -0.9 μg/m3 (0) 32.0
 
Jan. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 4.0 μg/m3 (4) -1.9 μg/m3 (0) 32.0
 
Jan. 15, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 33.0
 
Jan. 15, 2019, 11 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) 0.9 μg/m3 (4) 33.0
 
Jan. 15, 2019, 10 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) 2.7 μg/m3 (11) 32.0
 
Jan. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 32.0
 
Jan. 15, 2019, 8 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) 1.7 μg/m3 (7) 29.0
 
Jan. 15, 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) 2.6 μg/m3 (11) 28.0
 
Jan. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 8.0 μg/m3 (7) 1.2 μg/m3 (5) 29.0
 
Jan. 15, 2019, 5 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) 1.7 μg/m3 (7) 30.0
 
Jan. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 5.0 μg/m3 (5) 2.2 μg/m3 (9) 29.0
 
Jan. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 2.0 μg/m3 (2) 2.4 μg/m3 (10) 29.0
 
Jan. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) 2.4 μg/m3 (10) 28.0
 
Jan. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) 3.2 μg/m3 (13) 25.0
 
Jan. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (14) 25.0
 
Jan. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 24.0
 
Jan. 14, 2019, 10 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) 2.2 μg/m3 (9) 25.0
 
Jan. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 9.0 μg/m3 (8) 0.0 μg/m3 (0) 28.0
 
Jan. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) -2.9 μg/m3 (0) 31.0
 
Jan. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 14.0 μg/m3 (13) -0.7 μg/m3 (0) 30.0
 
Jan. 14, 2019, 6 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) -1.9 μg/m3 (0) 31.0