ID: 2167

AQSQID: 461270001

Site Name: Uc1

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

Updated: May 21, 2022, 2:27 a.m.

Location: Elk Point (475th Ave), SD

Reporting: False, Located: True

Current AQI: None

Elk Point (475th Ave) SD, US: 42.751518, -96.707208

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Oct. 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 13.0
 
Oct. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 13.0
 
Oct. 21, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 13.0
 
Oct. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 15.0
 
Oct. 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 15.0
 
Oct. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 16.0
 
Oct. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 16.0
 
Oct. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 15.0
 
Oct. 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 21, 2021, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 14.0
 
Oct. 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 13.0
 
Oct. 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A N/A 13.0
 
Oct. 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A N/A 12.0
 
Oct. 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A N/A 12.0
 
Oct. 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A N/A 11.0
 
Oct. 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A N/A 10.0
 
Oct. 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A N/A 9.0
 
Oct. 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A N/A 9.0
 
Oct. 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A N/A 8.0
 
Oct. 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A N/A 8.0
 
Oct. 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A N/A 7.0
 
Oct. 20, 2021, noon N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A N/A 7.0
 
Oct. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A N/A 7.0
 
Oct. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A N/A 7.0
 
Oct. 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A N/A 8.0
 
Oct. 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A N/A 12.0
 
Oct. 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A N/A 21.0
 
Oct. 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 25.0
 
Oct. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 49.0 μg/m3 (46) N/A 46.0
 
Oct. 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 51.0 μg/m3 (48) N/A 48.0
 
Oct. 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 49.0 μg/m3 (46) N/A 46.0
 
Oct. 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 61.0 μg/m3 (54) N/A 54.0
 
Oct. 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 54.0 μg/m3 (50) N/A 50.0
 
Oct. 20, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 102.0 μg/m3 (75) N/A 75.0
 
Oct. 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 38.0 μg/m3 (36) N/A 43.0
 
Oct. 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 51.0 μg/m3 (48) N/A 48.0
 
Oct. 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 43.0 μg/m3 (40) N/A 48.0
 
Oct. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 52.0 μg/m3 (49) N/A 49.0
 
Oct. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 64.0 μg/m3 (56) N/A 56.0
 
Oct. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 54.0 μg/m3 (50) N/A 50.0
 
Oct. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 64.0 μg/m3 (56) 16.3 μg/m3 (60) 60.0
 
Oct. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 33.0 μg/m3 (31) 6.9 μg/m3 (29) 39.0
 
Oct. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 53.0 μg/m3 (50) 12.4 μg/m3 (52) 52.0
 
Oct. 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 32.0 μg/m3 (30) 7.4 μg/m3 (31) 31.0
 
Oct. 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 17.0 μg/m3 (16) 8.1 μg/m3 (34) 34.0
 
Oct. 19, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 18.0 μg/m3 (17) 7.2 μg/m3 (31) 31.0
 
Oct. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 13.0 μg/m3 (13) 7.6 μg/m3 (32) 32.0
 
Oct. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 14.0 μg/m3 (13) 7.9 μg/m3 (33) 33.0
 
Oct. 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 18.0 μg/m3 (17) 4.3 μg/m3 (18) 25.0
 
Oct. 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 18.0 μg/m3 (17) 6.9 μg/m3 (29) 29.0
 
Oct. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 20.0 μg/m3 (19) 7.9 μg/m3 (33) 33.0
 
Oct. 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 18.0 μg/m3 (17) 5.3 μg/m3 (23) 27.0
 
Oct. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 23.0 μg/m3 (22) 9.1 μg/m3 (38) 38.0
 
Oct. 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 39.0 μg/m3 (37) 9.4 μg/m3 (40) 40.0
 
Oct. 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 42.0 μg/m3 (39) 9.6 μg/m3 (40) 40.0
 
Oct. 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 81.0 μg/m3 (64) 10.4 μg/m3 (44) 64.0
 
Oct. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 12.1 μg/m3 (51) 51.0
 
Oct. 19, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 73.0 μg/m3 (60) 14.5 μg/m3 (57) 60.0
 
Oct. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 41.0 μg/m3 (38) 5.8 μg/m3 (25) 38.0
 
Oct. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 64.0 μg/m3 (56) 9.9 μg/m3 (42) 56.0
 
Oct. 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 82.0 μg/m3 (65) 12.6 μg/m3 (53) 65.0
 
Oct. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 168.0 μg/m3 (108) 15.0 μg/m3 (58) 108.0
 
Oct. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 135.0 μg/m3 (91) 10.9 μg/m3 (46) 91.0
 
Oct. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 66.0 μg/m3 (57) 7.9 μg/m3 (33) 57.0
 
Oct. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 64.0 μg/m3 (56) 4.8 μg/m3 (20) 56.0
 
Oct. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 42.0 μg/m3 (39) 2.1 μg/m3 (9) 39.0
 
Oct. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 37.0 μg/m3 (35) 3.3 μg/m3 (14) 35.0
 
Oct. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 24.0 μg/m3 (23) 5.1 μg/m3 (22) 23.0
 
Oct. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 27.0 μg/m3 (25) 6.0 μg/m3 (25) 25.0
 
Oct. 18, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 20.0 μg/m3 (19) 5.7 μg/m3 (24) 24.0
 
Oct. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 18.0 μg/m3 (17) 6.0 μg/m3 (25) 25.0
 
Oct. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 18.0 μg/m3 (17) 6.0 μg/m3 (25) 25.0
 
Oct. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 18.0 μg/m3 (17) 4.1 μg/m3 (18) 18.0
 
Oct. 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 24.0 μg/m3 (23) 4.1 μg/m3 (18) 23.0
 
Oct. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 24.0 μg/m3 (23) 5.7 μg/m3 (24) 24.0
 
Oct. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 26.0 μg/m3 (25) 7.4 μg/m3 (31) 31.0
 
Oct. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 24.0 μg/m3 (23) 5.3 μg/m3 (23) 23.0
 
Oct. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 23.0 μg/m3 (22) 5.8 μg/m3 (25) 25.0
 
Oct. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 31.0 μg/m3 (29) 5.5 μg/m3 (23) 29.0
 
Oct. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 40.0 μg/m3 (38) 9.1 μg/m3 (38) 38.0
 
Oct. 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 50.0 μg/m3 (47) 17.5 μg/m3 (63) 63.0
 
Oct. 18, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 31.0 μg/m3 (29) 4.3 μg/m3 (18) 30.0
 
Oct. 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 42.0 μg/m3 (39) 4.8 μg/m3 (20) 39.0
 
Oct. 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 51.0 μg/m3 (48) 8.1 μg/m3 (34) 48.0
 
Oct. 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 53.0 μg/m3 (50) 7.9 μg/m3 (33) 50.0
 
Oct. 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 51.0 μg/m3 (48) 5.3 μg/m3 (23) 48.0
 
Oct. 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 66.0 μg/m3 (57) 6.0 μg/m3 (25) 57.0
 
Oct. 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 53.0 μg/m3 (50) 5.8 μg/m3 (25) 50.0
 
Oct. 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 29.0 μg/m3 (27) 3.1 μg/m3 (13) 27.0
 
Oct. 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 21.0 μg/m3 (20) 3.9 μg/m3 (17) 22.0
 
Oct. 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 20.0 μg/m3 (19) 5.1 μg/m3 (22) 22.0
 
Oct. 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 19.0 μg/m3 (18) 3.8 μg/m3 (16) 18.0
 
Oct. 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 15.0 μg/m3 (14) 5.0 μg/m3 (21) 21.0
 
Oct. 17, 2021, noon N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 14.0 μg/m3 (13) 4.8 μg/m3 (20) 20.0
 
Oct. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 15.0 μg/m3 (14) 7.6 μg/m3 (32) 32.0
 
Oct. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 18.0 μg/m3 (17) 9.6 μg/m3 (40) 40.0
 
Oct. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 14.0 μg/m3 (13) 4.8 μg/m3 (20) 20.0
 
Oct. 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 20.0 μg/m3 (19) 7.6 μg/m3 (32) 32.0
 
Oct. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 20.0 μg/m3 (19) 5.7 μg/m3 (24) 24.0
 
Oct. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 23.0 μg/m3 (22) 6.9 μg/m3 (29) 29.0
 
Oct. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 23.0 μg/m3 (22) 10.8 μg/m3 (46) 46.0
 
Oct. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 31.0 μg/m3 (29) 10.8 μg/m3 (46) 46.0
 
Oct. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 21.0 μg/m3 (20) 4.3 μg/m3 (18) 20.0
 
Oct. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 46.0 μg/m3 (43) 7.1 μg/m3 (30) 43.0
 
Oct. 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 25.0 μg/m3 (24) 5.5 μg/m3 (23) 27.0
 
Oct. 17, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 26.0 μg/m3 (25) 5.1 μg/m3 (22) 29.0
 
Oct. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 44.0 μg/m3 (41) 7.7 μg/m3 (33) 41.0
 
Oct. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 29.0 μg/m3 (27) 5.1 μg/m3 (22) 38.0
 
Oct. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 6.0 μg/m3 (6) 4.8 μg/m3 (20) 38.0
 
Oct. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 24.0 μg/m3 (23) 3.6 μg/m3 (16) 38.0
 
Oct. 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 22.0 μg/m3 (21) 0.0 μg/m3 (0) 37.0
 
Oct. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 8.0 μg/m3 (8) 0.2 μg/m3 (1) 36.0
 
Oct. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 24.0 μg/m3 (23) 1.1 μg/m3 (5) 34.0
 
Oct. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 31.0 μg/m3 (29) 1.6 μg/m3 (7) 31.0
 
Oct. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 12.0 μg/m3 (12) 3.6 μg/m3 (16) 26.0
 
Oct. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 11.0 μg/m3 (11) 7.2 μg/m3 (31) 31.0
 
Oct. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 54.0 μg/m3 (50) 8.6 μg/m3 (36) 50.0
 
Oct. 16, 2021, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 22.0 μg/m3 (21) 4.5 μg/m3 (19) 21.0
 
Oct. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 7.0 μg/m3 (7) 4.1 μg/m3 (18) 18.0
 
Oct. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 4.0 μg/m3 (4) 4.5 μg/m3 (19) 19.0
 
Oct. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 8.0 μg/m3 (8) 3.1 μg/m3 (13) 17.0
 
Oct. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 8.0 μg/m3 (8) 5.3 μg/m3 (23) 23.0
 
Oct. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 9.0 μg/m3 (9) 5.8 μg/m3 (25) 25.0
 
Oct. 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 13.0 μg/m3 (13) 4.8 μg/m3 (20) 20.0
 
Oct. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 16.0 μg/m3 (15) 3.3 μg/m3 (14) 22.0
 
Oct. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 18.0 μg/m3 (17) 4.6 μg/m3 (20) 24.0
 
Oct. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 14.0 μg/m3 (13) 7.6 μg/m3 (32) 32.0
 
Oct. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 23.0 μg/m3 (22) 4.3 μg/m3 (18) 25.0
 
Oct. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 16.0 μg/m3 (15) 2.6 μg/m3 (11) 25.0
 
Oct. 16, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 18.0 μg/m3 (17) 4.1 μg/m3 (18) 25.0
 
Oct. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 32.0 μg/m3 (30) 3.1 μg/m3 (13) 30.0
 
Oct. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 29.0 μg/m3 (27) 4.1 μg/m3 (18) 31.0
 
Oct. 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 30.0 μg/m3 (28) 4.1 μg/m3 (18) 33.0
 
Oct. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 57.0 μg/m3 (52) 3.4 μg/m3 (15) 52.0
 
Oct. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 67.0 μg/m3 (57) 1.7 μg/m3 (8) 57.0
 
Oct. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 10.0 μg/m3 (10) 2.1 μg/m3 (9) 28.0
 
Oct. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 14.0 μg/m3 (13) 0.7 μg/m3 (3) 28.0
 
Oct. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 27.0 μg/m3 (25) 1.4 μg/m3 (6) 26.0
 
Oct. 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 26.0 μg/m3 (25) 3.8 μg/m3 (16) 25.0
 
Oct. 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 27.0 μg/m3 (25) 3.6 μg/m3 (16) 25.0
 
Oct. 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Oct. 15, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 35.0 μg/m3 (33) 11.1 μg/m3 (47) 47.0
 
Oct. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 14.0 μg/m3 (13) 4.3 μg/m3 (18) 18.0
 
Oct. 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 5.0 μg/m3 (5) 3.8 μg/m3 (16) 16.0
 
Oct. 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 7.0 μg/m3 (7) 4.1 μg/m3 (18) 18.0
 
Oct. 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 4.3 μg/m3 (18) 18.0
 
Oct. 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 6.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
Oct. 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 0.0 μg/m3 (0) 4.1 μg/m3 (18) 18.0
 
Oct. 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 23.0
 
Oct. 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 7.0 μg/m3 (7) 1.4 μg/m3 (6) 25.0
 
Oct. 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 20.0 μg/m3 (19) 5.3 μg/m3 (23) 23.0
 
Oct. 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 30.0 μg/m3 (28) 8.4 μg/m3 (36) 36.0
 
Oct. 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 44.0 μg/m3 (41) 7.2 μg/m3 (31) 41.0
 
Oct. 15, 2021, midnight N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 52.0 μg/m3 (49) 9.4 μg/m3 (40) 49.0
 
Oct. 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 6.0 μg/m3 (6) 4.3 μg/m3 (18) 26.0
 
Oct. 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 56.0 μg/m3 (52) 5.8 μg/m3 (25) 52.0
 
Oct. 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 29.0 μg/m3 (27) 3.1 μg/m3 (13) 30.0
 
Oct. 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 22.0 μg/m3 (21) 2.1 μg/m3 (9) 30.0
 
Oct. 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 41.0 μg/m3 (38) 1.4 μg/m3 (6) 38.0
 
Oct. 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 21.0 μg/m3 (20) 2.4 μg/m3 (10) 30.0
 
Oct. 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 25.0 μg/m3 (24) 3.1 μg/m3 (13) 30.0
 
Oct. 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 14.0 μg/m3 (13) 1.8 μg/m3 (8) 30.0
 
Oct. 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 19.0 μg/m3 (18) 0.4 μg/m3 (2) 27.0