AQSQID: 460330132

Site Name: Wind Cave

Location: Custer Co, SD

Reporting: True, Located: True

Current AQI: 33.0

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
Nov. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 5.0 μg/m3 (5) -1.2 μg/m3 (0) 33.0
 
Nov. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 7.0 μg/m3 (6) -0.4 μg/m3 (0) 30.0
 
Nov. 15, 2019, 2 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) -1.4 μg/m3 (0) 28.0
 
Nov. 15, 2019, 1 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) -1.2 μg/m3 (0) 28.0
 
Nov. 15, 2019, noon N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 3.0 μg/m3 (3) 0.7 μg/m3 (3) 32.0
 
Nov. 15, 2019, 11 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) 0.2 μg/m3 (1) 30.0
 
Nov. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 1.0 μg/m3 (4) 28.0
 
Nov. 15, 2019, 9 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) 2.5 μg/m3 (10) 27.0
 
Nov. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 29.0
 
Nov. 15, 2019, 7 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) 0.5 μg/m3 (2) 28.0
 
Nov. 15, 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) 0.0 μg/m3 (0) 26.0
 
Nov. 15, 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) 0.2 μg/m3 (1) 28.0
 
Nov. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 2.0 μg/m3 (2) 0.5 μg/m3 (2) 31.0
 
Nov. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 30.0
 
Nov. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 28.0
 
Nov. 15, 2019, 1 a.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 (2) 28.0
 
Nov. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) -0.4 μg/m3 (0) 29.0
 
Nov. 14, 2019, 11 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 (6) 31.0
 
Nov. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 1.0 μg/m3 (1) 1.2 μg/m3 (5) 32.0
 
Nov. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 32.0
 
Nov. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 32.0
 
Nov. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 1.0 μg/m3 (1) 0.2 μg/m3 (1) 32.0
 
Nov. 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 1.0 μg/m3 (1) 3.6 μg/m3 (15) 32.0
 
Nov. 14, 2019, 5 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) 2.5 μg/m3 (10) 31.0
 
Nov. 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) 1.0 μg/m3 (4) 29.0
 
Nov. 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 12.0 μg/m3 (11) 2.0 μg/m3 (8) 28.0
 
Nov. 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 3.6 μg/m3 (15) 22.0
 
Nov. 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 22.0
 
Nov. 14, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 1.2 μg/m3 (5) 22.0
 
Nov. 14, 2019, 11 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
 
Nov. 14, 2019, 10 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) 1.2 μg/m3 (5) 24.0
 
Nov. 14, 2019, 9 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) 0.0 μg/m3 (0) 25.0
 
Nov. 14, 2019, 8 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 (2) 25.0
 
Nov. 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 0.0 μg/m3 (0) 2.5 μg/m3 (10) 19.0
 
Nov. 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A -1.0 μg/m3 (0) 2.0 μg/m3 (8) 17.0
 
Nov. 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 18.0
 
Nov. 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 0.0 μg/m3 (0) 3.1 μg/m3 (13) 18.0
 
Nov. 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A -2.0 μg/m3 (0) 2.9 μg/m3 (12) 18.0
 
Nov. 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 1.0 μg/m3 (1) 2.7 μg/m3 (11) 19.0
 
Nov. 14, 2019, 1 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) 3.1 μg/m3 (13) 22.0
 
Nov. 14, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) 2.9 μg/m3 (12) 25.0
 
Nov. 13, 2019, 11 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) 2.2 μg/m3 (9) 25.0
 
Nov. 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 28.0
 
Nov. 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A -1.0 μg/m3 (0) -2.6 μg/m3 (0) 28.0
 
Nov. 13, 2019, 8 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) -2.6 μg/m3 (0) 31.0
 
Nov. 13, 2019, 7 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) -2.1 μg/m3 (0) 31.0
 
Nov. 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 1.0 μg/m3 (1) -2.1 μg/m3 (0) 32.0
 
Nov. 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) -0.6 μg/m3 (0) 28.0
 
Nov. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) -0.1 μg/m3 (0) 25.0
 
Nov. 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 25.0
 
Nov. 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) 2.5 μg/m3 (10) 22.0
 
Nov. 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) -0.2 μg/m3 (0) 25.0
 
Nov. 13, 2019, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) -2.4 μg/m3 (0) 28.0
 
Nov. 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 28.0
 
Nov. 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 2.0 μg/m3 (2) 2.9 μg/m3 (12) 31.0
 
Nov. 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) 0.5 μg/m3 (2) 32.0
 
Nov. 13, 2019, 8 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) 1.2 μg/m3 (5) 32.0
 
Nov. 13, 2019, 7 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) 0.7 μg/m3 (3) 31.0
 
Nov. 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 30.0
 
Nov. 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 0.7 μg/m3 (3) 28.0
 
Nov. 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 3.0 μg/m3 (3) 0.7 μg/m3 (3) 31.0
 
Nov. 13, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 6.0 μg/m3 (5) 1.0 μg/m3 (4) 31.0
 
Nov. 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 10.0 μg/m3 (9) 0.0 μg/m3 (0) 29.0
 
Nov. 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 12.0 μg/m3 (11) -1.6 μg/m3 (0) 29.0
 
Nov. 13, 2019, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 8.0 μg/m3 (7) -0.4 μg/m3 (0) 30.0
 
Nov. 12, 2019, 11 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) -0.4 μg/m3 (0) 31.0
 
Nov. 12, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 16.0 μg/m3 (15) -0.9 μg/m3 (0) 32.0
 
Nov. 12, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 13.0 μg/m3 (12) 0.5 μg/m3 (2) 32.0
 
Nov. 12, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 13.0 μg/m3 (12) 0.5 μg/m3 (2) 32.0
 
Nov. 12, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 35.0
 
Nov. 12, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 3.0 μg/m3 (3) -2.4 μg/m3 (0) 35.0
 
Nov. 12, 2019, 5 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) -2.1 μg/m3 (0) 33.0
 
Nov. 12, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 10.0 μg/m3 (9) -0.9 μg/m3 (0) 30.0
 
Nov. 12, 2019, 3 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) 0.2 μg/m3 (1) 28.0
 
Nov. 12, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 0.7 μg/m3 (3) 27.0
 
Nov. 12, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) 2.0 μg/m3 (8) 27.0
 
Nov. 12, 2019, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 0.7 μg/m3 (3) 28.0
 
Nov. 12, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A -3.6 μg/m3 (0) 28.0
 
Nov. 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A -0.2 μg/m3 (0) 28.0
 
Nov. 12, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) 1.2 μg/m3 (5) 29.0
 
Nov. 12, 2019, 8 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) -0.4 μg/m3 (0) 29.0
 
Nov. 12, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 31.0
 
Nov. 12, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 30.0
 
Nov. 12, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 29.0
 
Nov. 12, 2019, 4 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) 4.3 μg/m3 (18) 28.0
 
Nov. 12, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) 2.7 μg/m3 (11) 28.0
 
Nov. 12, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) 3.6 μg/m3 (15) 26.0
 
Nov. 12, 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) 4.1 μg/m3 (17) 25.0
 
Nov. 12, 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) 4.8 μg/m3 (20) 25.0
 
Nov. 11, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 2.9 μg/m3 (12) 25.0
 
Nov. 11, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 2.2 μg/m3 (9) 25.0
 
Nov. 11, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 2.7 μg/m3 (11) 27.0
 
Nov. 11, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 27.0
 
Nov. 11, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 26.0
 
Nov. 11, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (11) 27.0
 
Nov. 11, 2019, 5 p.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 (3) 24.0
 
Nov. 11, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 0.2 μg/m3 (1) 24.0
 
Nov. 11, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 1.0 μg/m3 (1) 1.7 μg/m3 (7) 23.0
 
Nov. 11, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) 1.7 μg/m3 (7) 23.0
 
Nov. 11, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) 3.1 μg/m3 (13) 23.0
 
Nov. 11, 2019, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 4.6 μg/m3 (19) 24.0
 
Nov. 11, 2019, 11 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) 4.1 μg/m3 (17) 23.0
 
Nov. 11, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 4.1 μg/m3 (17) 22.0
 
Nov. 11, 2019, 9 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) 2.5 μg/m3 (10) 22.0
 
Nov. 11, 2019, 8 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) 2.2 μg/m3 (9) 22.0
 
Nov. 11, 2019, 7 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) 2.2 μg/m3 (9) 22.0
 
Nov. 11, 2019, 6 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) 2.9 μg/m3 (12) 23.0
 
Nov. 11, 2019, 5 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) 1.5 μg/m3 (6) 22.0
 
Nov. 11, 2019, 4 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) 1.2 μg/m3 (5) 22.0
 
Nov. 11, 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) 3.6 μg/m3 (15) 22.0
 
Nov. 11, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 11.0 μg/m3 (10) 5.3 μg/m3 (22) 22.0
 
Nov. 11, 2019, 1 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) 5.8 μg/m3 (24) 24.0
 
Nov. 11, 2019, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 6.0 μg/m3 (5) 7.3 μg/m3 (30) 30.0
 
Nov. 10, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 10.0 μg/m3 (9) 4.6 μg/m3 (19) 19.0
 
Nov. 10, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 15.0 μg/m3 (14) 3.4 μg/m3 (14) 18.0
 
Nov. 10, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 4.8 μg/m3 (20) 20.0
 
Nov. 10, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A -3.0 μg/m3 (0) 1.7 μg/m3 (7) 19.0
 
Nov. 10, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 1.0 μg/m3 (4) 19.0
 
Nov. 10, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 1.0 μg/m3 (4) 16.0
 
Nov. 10, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 1.0 μg/m3 (1) 2.5 μg/m3 (10) 12.0
 
Nov. 10, 2019, 4 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) 2.5 μg/m3 (10) 14.0
 
Nov. 10, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 8.0 μg/m3 (7) 3.8 μg/m3 (16) 16.0
 
Nov. 10, 2019, 2 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) 6.8 μg/m3 (28) 28.0
 
Nov. 10, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Nov. 10, 2019, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 8.0 μg/m3 (7) 4.3 μg/m3 (18) 18.0
 
Nov. 10, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 7.0 μg/m3 (6) 1.5 μg/m3 (6) 14.0
 
Nov. 10, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 15.0
 
Nov. 10, 2019, 9 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) 2.9 μg/m3 (12) 17.0
 
Nov. 10, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 3.0 μg/m3 (3) 2.5 μg/m3 (10) 19.0
 
Nov. 10, 2019, 7 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) 1.7 μg/m3 (7) 22.0
 
Nov. 10, 2019, 6 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) 2.3 μg/m3 (10) 25.0
 
Nov. 10, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 3.4 μg/m3 (14) 26.0
 
Nov. 10, 2019, 4 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) 3.1 μg/m3 (13) 28.0
 
Nov. 10, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 2.2 μg/m3 (9) 28.0
 
Nov. 10, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (11) 28.0
 
Nov. 10, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) 1.5 μg/m3 (6) 29.0
 
Nov. 10, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) -0.4 μg/m3 (0) 29.0
 
Nov. 9, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) -1.1 μg/m3 (0) 32.0
 
Nov. 9, 2019, 10 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) -1.9 μg/m3 (0) 33.0
 
Nov. 9, 2019, 9 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 (0) 34.0
 
Nov. 9, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) 1.5 μg/m3 (6) 8.0
 
Nov. 9, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 1.5 μg/m3 (6) 6.0
 
Nov. 9, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 2.0 μg/m3 (2) -0.1 μg/m3 (0) 36.0
 
Nov. 9, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 7.0 μg/m3 (6) -0.2 μg/m3 (0) 30.0
 
Nov. 9, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 11.0 μg/m3 (10) 0.0 μg/m3 (0) 27.0
 
Nov. 9, 2019, 3 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) 0.3 μg/m3 (1) 26.0
 
Nov. 9, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (7) 26.0
 
Nov. 9, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 0.5 μg/m3 (2) 26.0
 
Nov. 9, 2019, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 10.0 μg/m3 (9) 0.2 μg/m3 (1) 27.0
 
Nov. 9, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) 1.7 μg/m3 (7) 28.0
 
Nov. 9, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 29.0
 
Nov. 9, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 32.0
 
Nov. 9, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) 2.9 μg/m3 (12) 32.0
 
Nov. 9, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) 0.2 μg/m3 (1) 32.0
 
Nov. 9, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 1.0 μg/m3 (1) -1.4 μg/m3 (0) 31.0
 
Nov. 9, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 31.0
 
Nov. 9, 2019, 4 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) 1.2 μg/m3 (5) 31.0
 
Nov. 9, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 2.5 μg/m3 (10) 31.0
 
Nov. 9, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 0.0 μg/m3 (0) 3.3 μg/m3 (14) 30.0
 
Nov. 9, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 1.0 μg/m3 (1) 1.0 μg/m3 (4) 31.0
 
Nov. 9, 2019, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 1.0 μg/m3 (1) 1.5 μg/m3 (6) 32.0
 
Nov. 8, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 0.0 μg/m3 (0) -1.1 μg/m3 (0) 32.0
 
Nov. 8, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A -1.0 μg/m3 (0) -1.6 μg/m3 (0) 33.0
 
Nov. 8, 2019, 9 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) -1.6 μg/m3 (0) 34.0
 
Nov. 8, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 3.0 μg/m3 (3) -0.9 μg/m3 (0) 34.0
 
Nov. 8, 2019, 7 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) 0.5 μg/m3 (2) 32.0
 
Nov. 8, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 3.0 μg/m3 (3) -0.9 μg/m3 (0) 33.0
 
Nov. 8, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 33.0