ID: 2146

AQSQID: 460930001

Site Name: Black Hawk

Added: April 21, 2020, 6:24 p.m.

Updated: April 20, 2021, 9:43 a.m.

Location: Black Hawk (Angus Lane), SD

Reporting: True, Located: True

Current AQI: 31.0

Black Hawk (Angus Lane) SD, US: 44.155636, -103.315765

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A -1.4 μg/m3 (0) N/A 31.0
 
April 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 1.7 μg/m3 (2) N/A 28.0
 
April 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 1.9 μg/m3 (2) N/A 29.0
 
April 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.6 μg/m3 (1) N/A 31.0
 
April 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 0.7 μg/m3 (1) N/A 33.0
 
April 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.4 μg/m3 (4) N/A 35.0
 
April 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 6.8 μg/m3 (7) N/A 37.0
 
April 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 6.5 μg/m3 (7) N/A 38.0
 
April 20, 2021, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 5.6 μg/m3 (6) N/A 38.0
 
April 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 9.2 μg/m3 (9) N/A 38.0
 
April 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 4.6 μg/m3 (5) N/A 38.0
 
April 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 8.0 μg/m3 (8) N/A 39.0
 
April 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 8.2 μg/m3 (8) N/A 39.0
 
April 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 12.8 μg/m3 (12) N/A 38.0
 
April 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 4.3 μg/m3 (4) N/A 38.0
 
April 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A -0.4 μg/m3 (0) N/A 38.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 2.7 μg/m3 (3) N/A 37.0
 
April 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 3.6 μg/m3 (4) N/A 36.0
 
April 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 2.4 μg/m3 (3) N/A 36.0
 
April 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 1.9 μg/m3 (2) N/A 37.0
 
April 19, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 2.2 μg/m3 (3) N/A 36.0
 
April 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 5.5 μg/m3 (6) N/A 36.0
 
April 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 5.5 μg/m3 (6) N/A 34.0
 
April 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 1.2 μg/m3 (2) N/A 33.0
 
April 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.7 μg/m3 (1) N/A 30.0
 
April 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 1.9 μg/m3 (2) N/A 29.0
 
April 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 3.1 μg/m3 (3) N/A 27.0
 
April 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 3.8 μg/m3 (4) N/A 28.0
 
April 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 4.8 μg/m3 (5) N/A 30.0
 
April 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 1.2 μg/m3 (2) N/A 27.0
 
April 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.6 μg/m3 (5) N/A 26.0
 
April 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 6.8 μg/m3 (7) N/A 30.0
 
April 19, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 9.6 μg/m3 (9) N/A 34.0
 
April 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 15.4 μg/m3 (15) N/A 38.0
 
April 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 7.0 μg/m3 (7) N/A 40.0
 
April 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 8.9 μg/m3 (9) N/A 39.0
 
April 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 10.6 μg/m3 (10) N/A 39.0
 
April 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 8.9 μg/m3 (9) N/A 39.0
 
April 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 9.4 μg/m3 (9) N/A 40.0
 
April 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 4.6 μg/m3 (5) N/A 45.0
 
April 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 2.4 μg/m3 (3) N/A 45.0
 
April 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A -0.1 μg/m3 (0) N/A 43.0
 
April 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A -0.5 μg/m3 (0) N/A 42.0
 
April 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A -2.7 μg/m3 (0) N/A 41.0
 
April 18, 2021, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -1.8 μg/m3 (0) N/A 37.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 0.4 μg/m3 (1) N/A 37.0
 
April 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 0.5 μg/m3 (1) N/A 37.0
 
April 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -0.4 μg/m3 (0) N/A 37.0
 
April 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.6 μg/m3 (3) N/A 35.0
 
April 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 5.8 μg/m3 (6) N/A 31.0
 
April 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 6.8 μg/m3 (7) N/A 31.0
 
April 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 6.8 μg/m3 (7) N/A 27.0
 
April 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 5.9 μg/m3 (6) N/A 33.0
 
April 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.5 μg/m3 (4) N/A 35.0
 
April 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 5.5 μg/m3 (6) N/A 36.0
 
April 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 6.4 μg/m3 (6) N/A 37.0
 
April 18, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 4.3 μg/m3 (4) N/A 42.0
 
April 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 3.7 μg/m3 (4) N/A 44.0
 
April 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 5.4 μg/m3 (5) N/A 44.0
 
April 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 3.5 μg/m3 (4) N/A 43.0
 
April 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 5.9 μg/m3 (6) N/A 41.0
 
April 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 4.0 μg/m3 (4) N/A 42.0
 
April 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 5.2 μg/m3 (5) N/A 40.0
 
April 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A -0.1 μg/m3 (0) N/A 38.0
 
April 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -0.1 μg/m3 (0) N/A 34.0
 
April 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.1 μg/m3 (1) N/A 31.0
 
April 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.7 μg/m3 (1) N/A 34.0
 
April 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.9 μg/m3 (2) N/A 31.0
 
April 17, 2021, noon N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 0.0 μg/m3 (0) N/A 38.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -0.9 μg/m3 (0) N/A 34.0
 
April 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A -0.5 μg/m3 (0) N/A 28.0
 
April 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.8 μg/m3 (1) N/A 25.0
 
April 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A -1.7 μg/m3 (0) N/A 28.0
 
April 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A -1.2 μg/m3 (0) N/A 28.0
 
April 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.3 μg/m3 (3) N/A 31.0
 
April 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 2.3 μg/m3 (3) N/A 30.0
 
April 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.3 μg/m3 (0) N/A 30.0
 
April 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.0 μg/m3 (0) N/A 30.0
 
April 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 1.6 μg/m3 (2) N/A 29.0
 
April 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.0 μg/m3 (0) N/A 30.0
 
April 17, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -3.1 μg/m3 (0) N/A 30.0
 
April 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A -1.9 μg/m3 (0) N/A 31.0
 
April 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.1 μg/m3 (1) N/A 30.0
 
April 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 2.8 μg/m3 (3) N/A 30.0
 
April 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 5.5 μg/m3 (6) N/A 30.0
 
April 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.3 μg/m3 (0) N/A 30.0
 
April 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -3.3 μg/m3 (0) N/A 30.0
 
April 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A -1.0 μg/m3 (0) N/A 29.0
 
April 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A -0.7 μg/m3 (0) N/A 28.0
 
April 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A -3.6 μg/m3 (0) N/A 25.0
 
April 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A -3.6 μg/m3 (0) N/A 19.0
 
April 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A -4.3 μg/m3 (0) N/A 16.0
 
April 16, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A -1.2 μg/m3 (0) N/A 16.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A -2.3 μg/m3 (0) N/A 16.0
 
April 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 18.0
 
April 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A -4.3 μg/m3 (0) N/A 20.0
 
April 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A -3.3 μg/m3 (0) N/A 22.0
 
April 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A -4.1 μg/m3 (0) N/A 21.0
 
April 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A -0.9 μg/m3 (0) N/A 22.0
 
April 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 2.9 μg/m3 (3) N/A 22.0
 
April 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 0.2 μg/m3 (1) N/A 21.0
 
April 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A -2.3 μg/m3 (0) N/A 23.0
 
April 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A -0.2 μg/m3 (0) N/A 24.0
 
April 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A -0.7 μg/m3 (0) N/A 23.0
 
April 16, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A -4.5 μg/m3 (0) N/A 25.0
 
April 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A -4.3 μg/m3 (0) N/A 26.0
 
April 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 0.2 μg/m3 (1) N/A 27.0
 
April 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 1.9 μg/m3 (2) N/A 27.0
 
April 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A -0.9 μg/m3 (0) N/A 25.0
 
April 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.2 μg/m3 (1) N/A 25.0
 
April 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 2.4 μg/m3 (3) N/A 26.0
 
April 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.3 μg/m3 (4) N/A 26.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 7.0 μg/m3 (7) N/A 23.0
 
April 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 5.3 μg/m3 (5) N/A 18.0
 
April 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A -2.3 μg/m3 (0) N/A 15.0
 
April 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 2.1 μg/m3 (2) N/A 19.0
 
April 15, 2021, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 3.6 μg/m3 (4) N/A 20.0
 
April 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 0.2 μg/m3 (1) N/A 21.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 3.8 μg/m3 (4) N/A 23.0
 
April 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 5.8 μg/m3 (6) N/A 25.0
 
April 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A -1.4 μg/m3 (0) N/A 26.0
 
April 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 0.0 μg/m3 (0) N/A 28.0
 
April 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 2.1 μg/m3 (2) N/A 29.0
 
April 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 3.8 μg/m3 (4) N/A 30.0
 
April 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 3.6 μg/m3 (4) N/A 30.0
 
April 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.4 μg/m3 (0) N/A 30.0
 
April 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.2 μg/m3 (1) N/A 30.0
 
April 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 2.1 μg/m3 (2) N/A 30.0
 
April 15, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 2.6 μg/m3 (3) N/A 32.0
 
April 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.4 μg/m3 (1) N/A 32.0
 
April 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A -1.0 μg/m3 (0) N/A 31.0
 
April 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.2 μg/m3 (2) N/A 31.0
 
April 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 2.6 μg/m3 (3) N/A 32.0
 
April 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 5.1 μg/m3 (5) N/A 32.0
 
April 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 7.5 μg/m3 (7) N/A 32.0
 
April 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 6.3 μg/m3 (6) N/A 33.0
 
April 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A -1.2 μg/m3 (0) N/A 33.0
 
April 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.9 μg/m3 (1) N/A 32.0
 
April 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.4 μg/m3 (1) N/A 30.0
 
April 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.4 μg/m3 (1) N/A 29.0
 
April 14, 2021, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.4 μg/m3 (0) N/A 30.0
 
April 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A -1.6 μg/m3 (0) N/A 33.0
 
April 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A -2.3 μg/m3 (0) N/A 33.0
 
April 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -2.6 μg/m3 (0) N/A 34.0
 
April 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -3.6 μg/m3 (0) N/A 34.0
 
April 14, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A -2.3 μg/m3 (0) N/A 35.0
 
April 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A -0.5 μg/m3 (0) N/A 35.0
 
April 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) N/A 35.0
 
April 14, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.4 μg/m3 (1) N/A 35.0
 
April 14, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 1.4 μg/m3 (2) N/A 34.0
 
April 14, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 1.4 μg/m3 (2) N/A 33.0
 
April 14, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 1.2 μg/m3 (2) N/A 34.0
 
April 14, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 2.4 μg/m3 (3) N/A 39.0
 
April 13, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 2.4 μg/m3 (3) N/A 40.0
 
April 13, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 2.6 μg/m3 (3) N/A 40.0
 
April 13, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 1.9 μg/m3 (2) N/A 40.0
 
April 13, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 0.0 μg/m3 (0) N/A 40.0
 
April 13, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 1.2 μg/m3 (2) N/A 42.0
 
April 13, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 0.7 μg/m3 (1) N/A 41.0
 
April 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A -0.5 μg/m3 (0) N/A 41.0
 
April 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A -0.9 μg/m3 (0) N/A 41.0
 
April 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 0.7 μg/m3 (1) N/A 40.0
 
April 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 3.9 μg/m3 (4) N/A 38.0
 
April 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 2.4 μg/m3 (3) N/A 38.0
 
April 13, 2021, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 1.7 μg/m3 (2) N/A 37.0
 
April 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A -0.7 μg/m3 (0) N/A 38.0
 
April 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -2.1 μg/m3 (0) N/A 37.0
 
April 13, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -2.6 μg/m3 (0) N/A 37.0