AQSQID: 460330132

Site Name: Wind Cave

Location: Custer Co, SD

Reporting: True, Located: True

Current AQI: 13.0

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
May 19, 2019, 11 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) -0.4 μg/m3 (0) 13.0
 
May 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 1.0 μg/m3 (1) 1.0 μg/m3 (4) 15.0
 
May 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 1.0 μg/m3 (1) 1.0 μg/m3 (4) 18.0
 
May 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (4) 22.0
 
May 19, 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) 0.7 μg/m3 (3) 18.0
 
May 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 5.0 μg/m3 (5) -0.4 μg/m3 (0) 15.0
 
May 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 5.0 μg/m3 (5) -0.6 μg/m3 (0) 15.0
 
May 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 4.0 μg/m3 (4) 0.8 μg/m3 (3) 18.0
 
May 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 20.0
 
May 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 1.0 μg/m3 (1) 2.2 μg/m3 (9) 20.0
 
May 19, 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) 2.2 μg/m3 (9) 22.0
 
May 19, 2019, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 0.0 μg/m3 (0) -0.9 μg/m3 (0) 22.0
 
May 18, 2019, 11 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) -0.2 μg/m3 (0) 22.0
 
May 18, 2019, 10 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) -0.1 μg/m3 (0) 22.0
 
May 18, 2019, 9 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) 0.3 μg/m3 (1) 22.0
 
May 18, 2019, 8 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) 2.2 μg/m3 (9) 22.0
 
May 18, 2019, 7 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) 1.5 μg/m3 (6) 19.0
 
May 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) -0.2 μg/m3 (0) 18.0
 
May 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 18.0
 
May 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 2.7 μg/m3 (11) 18.0
 
May 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 17.0
 
May 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 2.7 μg/m3 (11) 15.0
 
May 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 3.0 μg/m3 (3) 0.7 μg/m3 (3) 18.0
 
May 18, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 0.5 μg/m3 (2) 18.0
 
May 18, 2019, 11 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) 1.0 μg/m3 (4) 18.0
 
May 18, 2019, 10 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) 1.7 μg/m3 (7) 15.0
 
May 18, 2019, 9 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) 1.0 μg/m3 (4) 15.0
 
May 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 16.0
 
May 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 2.0 μg/m3 (2) 1.2 μg/m3 (5) 14.0
 
May 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 4.0 μg/m3 (4) 1.5 μg/m3 (6) 15.0
 
May 18, 2019, 5 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) 3.0 μg/m3 (12) 18.0
 
May 18, 2019, 4 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) 3.0 μg/m3 (12) 19.0
 
May 18, 2019, 3 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) 1.2 μg/m3 (5) 19.0
 
May 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 8.0 μg/m3 (7) 1.7 μg/m3 (7) 18.0
 
May 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 16.0
 
May 18, 2019, midnight N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 4.0 μg/m3 (4) 1.2 μg/m3 (5) 16.0
 
May 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 2.5 μg/m3 (10) 18.0
 
May 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 3.2 μg/m3 (13) 18.0
 
May 17, 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) 3.8 μg/m3 (16) 19.0
 
May 17, 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 (3) 3.8 μg/m3 (16) 19.0
 
May 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 4.0 μg/m3 (4) 4.3 μg/m3 (18) 20.0
 
May 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 15.0 μg/m3 (14) 7.3 μg/m3 (30) 30.0
 
May 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 16.0 μg/m3 (15) 9.2 μg/m3 (38) 38.0
 
May 17, 2019, 4 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) 7.0 μg/m3 (29) 29.0
 
May 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 18.0 μg/m3 (16) 6.3 μg/m3 (26) 26.0
 
May 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 16.0 μg/m3 (15) 6.8 μg/m3 (28) 28.0
 
May 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 12.0 μg/m3 (11) 3.0 μg/m3 (12) 25.0
 
May 17, 2019, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 15.0 μg/m3 (14) 3.8 μg/m3 (16) 24.0
 
May 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 11.0 μg/m3 (10) 5.1 μg/m3 (21) 26.0
 
May 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 14.0 μg/m3 (13) 6.6 μg/m3 (28) 28.0
 
May 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 17.0 μg/m3 (15) 3.2 μg/m3 (13) 25.0
 
May 17, 2019, 8 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) 3.0 μg/m3 (12) 24.0
 
May 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 5.3 μg/m3 (22) 24.0
 
May 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 13.0 μg/m3 (12) 5.3 μg/m3 (22) 24.0
 
May 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 19.0 μg/m3 (17) 8.0 μg/m3 (33) 33.0
 
May 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) 7.3 μg/m3 (30) 30.0
 
May 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 16.0 μg/m3 (15) 7.3 μg/m3 (30) 30.0
 
May 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
May 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 12.0 μg/m3 (11) 7.7 μg/m3 (32) 32.0
 
May 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 21.0 μg/m3 (19) 3.6 μg/m3 (15) 35.0
 
May 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 22.0 μg/m3 (20) 4.3 μg/m3 (18) 35.0
 
May 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 21.0 μg/m3 (19) 4.3 μg/m3 (18) 35.0
 
May 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 21.0 μg/m3 (19) 2.7 μg/m3 (11) 36.0
 
May 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 17.0 μg/m3 (15) 5.1 μg/m3 (21) 34.0
 
May 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 18.0 μg/m3 (16) 5.1 μg/m3 (21) 33.0
 
May 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 15.0 μg/m3 (14) 4.6 μg/m3 (19) 32.0
 
May 16, 2019, 2 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) 4.1 μg/m3 (17) 30.0
 
May 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 15.0 μg/m3 (14) 4.3 μg/m3 (18) 33.0
 
May 16, 2019, noon N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 12.0 μg/m3 (11) 6.1 μg/m3 (25) 32.0
 
May 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 14.0 μg/m3 (13) 3.2 μg/m3 (13) 34.0
 
May 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) 2.5 μg/m3 (10) 34.0
 
May 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 4.6 μg/m3 (19) 35.0
 
May 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 12.0 μg/m3 (11) 1.8 μg/m3 (8) 35.0
 
May 16, 2019, 7 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) 4.3 μg/m3 (18) 36.0
 
May 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 6.5 μg/m3 (27) 37.0
 
May 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 12.0 μg/m3 (11) 4.1 μg/m3 (17) 37.0
 
May 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 14.0 μg/m3 (13) 4.1 μg/m3 (17) 37.0
 
May 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 17.0 μg/m3 (15) 4.3 μg/m3 (18) 38.0
 
May 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 39.0
 
May 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 7.0 μg/m3 (6) 3.1 μg/m3 (13) 37.0
 
May 16, 2019, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 10.0 μg/m3 (9) 4.3 μg/m3 (18) 40.0
 
May 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 13.0 μg/m3 (12) 4.6 μg/m3 (19) 42.0
 
May 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 8.0 μg/m3 (7) 4.8 μg/m3 (20) 44.0
 
May 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 16.0 μg/m3 (15) 2.5 μg/m3 (10) 42.0
 
May 15, 2019, 8 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) 1.0 μg/m3 (4) 43.0
 
May 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 10.0 μg/m3 (9) 0.7 μg/m3 (3) 42.0
 
May 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 9.0 μg/m3 (8) 0.8 μg/m3 (3) 42.0
 
May 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 12.0 μg/m3 (11) 2.5 μg/m3 (10) 41.0
 
May 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 14.0 μg/m3 (13) 4.1 μg/m3 (17) 40.0
 
May 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 9.0 μg/m3 (8) 2.8 μg/m3 (12) 22.0
 
May 15, 2019, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 9.0 μg/m3 (8) 3.9 μg/m3 (16) 28.0
 
May 15, 2019, 11 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) 2.1 μg/m3 (9) 34.0
 
May 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 35.0
 
May 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 0.4 μg/m3 (2) 36.0
 
May 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 11.0 μg/m3 (10) 2.8 μg/m3 (12) 35.0
 
May 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 8.0 μg/m3 (7) 4.4 μg/m3 (18) 35.0
 
May 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 35.0
 
May 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 9.0 μg/m3 (8) 4.9 μg/m3 (20) 35.0
 
May 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 5.4 μg/m3 (23) 37.0
 
May 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 15.0 μg/m3 (14) 5.9 μg/m3 (25) 36.0
 
May 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 33.0
 
May 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 14.0 μg/m3 (13) 1.1 μg/m3 (5) 31.0
 
May 15, 2019, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 12.0 μg/m3 (11) 3.2 μg/m3 (13) 35.0
 
May 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 10.0 μg/m3 (9) 4.7 μg/m3 (20) 42.0
 
May 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 42.0
 
May 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 12.0 μg/m3 (11) 1.6 μg/m3 (7) 42.0
 
May 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 19.0 μg/m3 (17) 3.0 μg/m3 (12) 42.0
 
May 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 16.0 μg/m3 (15) 4.9 μg/m3 (20) 40.0
 
May 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 11.0 μg/m3 (10) 3.2 μg/m3 (13) 40.0
 
May 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (12) 38.0
 
May 14, 2019, 4 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) 3.7 μg/m3 (15) 36.0
 
May 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 9.0 μg/m3 (8) 1.6 μg/m3 (7) 40.0
 
May 14, 2019, 2 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) 3.0 μg/m3 (12) 38.0
 
May 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 15.0 μg/m3 (14) 3.3 μg/m3 (14) 33.0
 
May 14, 2019, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 14.0 μg/m3 (13) 5.2 μg/m3 (22) 35.0
 
May 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 13.0 μg/m3 (12) 5.7 μg/m3 (24) 38.0
 
May 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 11.0 μg/m3 (10) 4.2 μg/m3 (18) 36.0
 
May 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 10.0 μg/m3 (9) 5.4 μg/m3 (23) 38.0
 
May 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 15.0 μg/m3 (14) 4.2 μg/m3 (18) 35.0
 
May 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 12.0 μg/m3 (11) 4.0 μg/m3 (17) 38.0
 
May 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 12.0 μg/m3 (11) 4.0 μg/m3 (17) 38.0
 
May 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 13.0 μg/m3 (12) 6.4 μg/m3 (27) 38.0
 
May 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 14.0 μg/m3 (13) 6.2 μg/m3 (26) 40.0
 
May 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 8.0 μg/m3 (7) 5.9 μg/m3 (25) 40.0
 
May 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 11.0 μg/m3 (10) 5.9 μg/m3 (25) 41.0
 
May 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 10.0 μg/m3 (9) 6.2 μg/m3 (26) 42.0
 
May 14, 2019, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 8.0 μg/m3 (7) 0.0 μg/m3 (0) 43.0
 
May 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 8.0 μg/m3 (7) 2.8 μg/m3 (12) 42.0
 
May 13, 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) 4.2 μg/m3 (18) 38.0
 
May 13, 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) 1.6 μg/m3 (7) 36.0
 
May 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 11.0 μg/m3 (10) 2.1 μg/m3 (9) 40.0
 
May 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 8.0 μg/m3 (7) 3.7 μg/m3 (15) 40.0
 
May 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 9.0 μg/m3 (8) 3.7 μg/m3 (15) 38.0
 
May 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 12.0 μg/m3 (11) 1.9 μg/m3 (8) 37.0
 
May 13, 2019, 4 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) 1.1 μg/m3 (5) 37.0
 
May 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 11.0 μg/m3 (10) 1.3 μg/m3 (5) 37.0
 
May 13, 2019, 2 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) 2.9 μg/m3 (12) 38.0
 
May 13, 2019, 1 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) 4.0 μg/m3 (17) 38.0
 
May 13, 2019, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) 1.8 μg/m3 (8) 38.0
 
May 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 9.0 μg/m3 (8) 1.1 μg/m3 (5) 38.0
 
May 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 10.0 μg/m3 (9) 1.1 μg/m3 (5) 37.0
 
May 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 6.0 μg/m3 (5) 3.3 μg/m3 (14) 36.0
 
May 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 36.0
 
May 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 7.0 μg/m3 (6) 1.6 μg/m3 (7) 37.0
 
May 13, 2019, 6 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) 1.4 μg/m3 (6) 31.0
 
May 13, 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) 2.8 μg/m3 (12) 31.0
 
May 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) 2.6 μg/m3 (11) 31.0
 
May 13, 2019, 3 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) 1.3 μg/m3 (5) 30.0
 
May 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 7.0 μg/m3 (6) 2.8 μg/m3 (12) 28.0
 
May 13, 2019, 1 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) 3.9 μg/m3 (16) 28.0
 
May 13, 2019, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) 1.9 μg/m3 (8) 32.0
 
May 12, 2019, 11 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) -1.5 μg/m3 (0) 33.0
 
May 12, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) -0.8 μg/m3 (0) 32.0
 
May 12, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 32.0
 
May 12, 2019, 8 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) 0.0 μg/m3 (0) 31.0
 
May 12, 2019, 7 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) 0.9 μg/m3 (4) 31.0
 
May 12, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 12.0 μg/m3 (11) -1.5 μg/m3 (0) 30.0
 
May 12, 2019, 5 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) -1.5 μg/m3 (0) 30.0
 
May 12, 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) 1.6 μg/m3 (7) 30.0
 
May 12, 2019, 3 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) 1.1 μg/m3 (5) 32.0
 
May 12, 2019, 2 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) 0.6 μg/m3 (2) 31.0
 
May 12, 2019, 1 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) 3.7 μg/m3 (15) 28.0
 
May 12, 2019, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 0.0 μg/m3 (0) 5.7 μg/m3 (24) 24.0
 
May 12, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 1.0 μg/m3 (1) 2.6 μg/m3 (11) 24.0
 
May 12, 2019, 10 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) 0.6 μg/m3 (2) 24.0
 
May 12, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 0.6 μg/m3 (2) 22.0
 
May 12, 2019, 8 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) 2.4 μg/m3 (10) 25.0
 
May 12, 2019, 7 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) 3.1 μg/m3 (13) 23.0