ID: 2167

AQSQID: 461270001

Site Name: Uc1

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

Updated: Sept. 22, 2021, 6:01 p.m.

Location: Elk Point (475th Ave), SD

Reporting: True, Located: True

Current AQI: 52.0

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
Sept. 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 56.0 μg/m3 (52) 1.8 μg/m3 (8) 52.0
 
Sept. 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 54.0 μg/m3 (50) 1.9 μg/m3 (8) 50.0
 
Sept. 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 31.0 μg/m3 (29) 1.4 μg/m3 (6) 29.0
 
Sept. 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 32.0 μg/m3 (30) 0.0 μg/m3 (0) 30.0
 
Sept. 22, 2021, noon N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 33.0 μg/m3 (31) 0.4 μg/m3 (2) 31.0
 
Sept. 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 34.0 μg/m3 (32) 1.6 μg/m3 (7) 32.0
 
Sept. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 33.0 μg/m3 (31) 0.0 μg/m3 (0) 31.0
 
Sept. 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 33.0 μg/m3 (31) 2.1 μg/m3 (9) 31.0
 
Sept. 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 36.0 μg/m3 (34) 4.3 μg/m3 (18) 34.0
 
Sept. 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 37.0 μg/m3 (35) 2.3 μg/m3 (10) 35.0
 
Sept. 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 37.0 μg/m3 (35) 1.8 μg/m3 (8) 35.0
 
Sept. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 39.0 μg/m3 (37) 3.0 μg/m3 (13) 37.0
 
Sept. 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 42.0 μg/m3 (39) 4.0 μg/m3 (17) 39.0
 
Sept. 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 42.0 μg/m3 (39) 5.0 μg/m3 (21) 39.0
 
Sept. 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 60.0 μg/m3 (54) 8.1 μg/m3 (34) 54.0
 
Sept. 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 44.0 μg/m3 (41) 8.4 μg/m3 (36) 41.0
 
Sept. 22, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 44.0 μg/m3 (41) 5.7 μg/m3 (24) 41.0
 
Sept. 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 42.0 μg/m3 (39) 3.8 μg/m3 (16) 39.0
 
Sept. 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 48.0 μg/m3 (45) 4.1 μg/m3 (18) 45.0
 
Sept. 21, 2021, 9 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) 0.6 μg/m3 (3) 50.0
 
Sept. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 44.0 μg/m3 (41) 3.1 μg/m3 (13) 41.0
 
Sept. 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 45.0 μg/m3 (42) 6.0 μg/m3 (25) 42.0
 
Sept. 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 47.0 μg/m3 (44) 5.8 μg/m3 (25) 44.0
 
Sept. 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 37.0 μg/m3 (35) 4.8 μg/m3 (20) 35.0
 
Sept. 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 45.0 μg/m3 (42) 3.1 μg/m3 (13) 42.0
 
Sept. 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 37.0 μg/m3 (35) 1.8 μg/m3 (8) 35.0
 
Sept. 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 39.0 μg/m3 (37) 3.5 μg/m3 (15) 37.0
 
Sept. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 34.0 μg/m3 (32) 5.7 μg/m3 (24) 32.0
 
Sept. 21, 2021, noon N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 38.0 μg/m3 (36) 3.5 μg/m3 (15) 36.0
 
Sept. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 38.0 μg/m3 (36) 4.1 μg/m3 (18) 36.0
 
Sept. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 34.0 μg/m3 (32) 5.5 μg/m3 (23) 32.0
 
Sept. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 21.0 μg/m3 (20) 4.0 μg/m3 (17) 20.0
 
Sept. 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 22.0 μg/m3 (21) 2.8 μg/m3 (12) 21.0
 
Sept. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 22.0 μg/m3 (21) 1.6 μg/m3 (7) 21.0
 
Sept. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 23.0 μg/m3 (22) 3.3 μg/m3 (14) 22.0
 
Sept. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 39.0 μg/m3 (37) 6.0 μg/m3 (25) 37.0
 
Sept. 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 37.0 μg/m3 (35) 7.4 μg/m3 (31) 35.0
 
Sept. 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 37.0 μg/m3 (35) 5.5 μg/m3 (23) 35.0
 
Sept. 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 39.0 μg/m3 (37) 9.1 μg/m3 (38) 38.0
 
Sept. 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 39.0 μg/m3 (37) 7.6 μg/m3 (32) 37.0
 
Sept. 21, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 39.0 μg/m3 (37) 6.7 μg/m3 (28) 37.0
 
Sept. 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 40.0 μg/m3 (38) 6.2 μg/m3 (26) 38.0
 
Sept. 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 43.0 μg/m3 (40) 6.5 μg/m3 (28) 40.0
 
Sept. 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 35.0 μg/m3 (33) 5.3 μg/m3 (23) 38.0
 
Sept. 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 36.0 μg/m3 (34) 5.3 μg/m3 (23) 34.0
 
Sept. 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 37.0 μg/m3 (35) 3.1 μg/m3 (13) 35.0
 
Sept. 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 39.0 μg/m3 (37) 4.3 μg/m3 (18) 37.0
 
Sept. 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 24.0 μg/m3 (23) 6.2 μg/m3 (26) 26.0
 
Sept. 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 27.0 μg/m3 (25) 5.8 μg/m3 (25) 25.0
 
Sept. 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 30.0 μg/m3 (28) 7.6 μg/m3 (32) 32.0
 
Sept. 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 29.0 μg/m3 (27) 6.7 μg/m3 (28) 28.0
 
Sept. 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 34.0 μg/m3 (32) 11.4 μg/m3 (48) 48.0
 
Sept. 20, 2021, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 27.0 μg/m3 (25) 3.6 μg/m3 (16) 25.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 20.0 μg/m3 (19) 1.9 μg/m3 (8) 19.0
 
Sept. 20, 2021, 10 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) 5.0 μg/m3 (21) 22.0
 
Sept. 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 43.0 μg/m3 (40) 3.8 μg/m3 (16) 40.0
 
Sept. 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 37.0 μg/m3 (35) 2.8 μg/m3 (12) 35.0
 
Sept. 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 33.0 μg/m3 (31) 0.6 μg/m3 (3) 31.0
 
Sept. 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 48.0 μg/m3 (45) 5.3 μg/m3 (23) 45.0
 
Sept. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 45.0 μg/m3 (42) 9.4 μg/m3 (40) 42.0
 
Sept. 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 44.0 μg/m3 (41) 3.6 μg/m3 (16) 41.0
 
Sept. 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 53.0 μg/m3 (50) 3.1 μg/m3 (13) 50.0
 
Sept. 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 34.0 μg/m3 (32) 3.8 μg/m3 (16) 32.0
 
Sept. 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 44.0 μg/m3 (41) 2.8 μg/m3 (12) 41.0
 
Sept. 20, 2021, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 40.0 μg/m3 (38) 3.0 μg/m3 (13) 38.0
 
Sept. 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 44.0 μg/m3 (41) 4.3 μg/m3 (18) 41.0
 
Sept. 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 62.0 μg/m3 (55) 5.5 μg/m3 (23) 55.0
 
Sept. 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 54.0 μg/m3 (50) 7.1 μg/m3 (30) 50.0
 
Sept. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 51.0 μg/m3 (48) 5.2 μg/m3 (22) 48.0
 
Sept. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 57.0 μg/m3 (52) 4.5 μg/m3 (19) 52.0
 
Sept. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 48.0 μg/m3 (45) 6.2 μg/m3 (26) 45.0
 
Sept. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 43.0 μg/m3 (40) 6.9 μg/m3 (29) 41.0
 
Sept. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 40.0 μg/m3 (38) 6.5 μg/m3 (28) 40.0
 
Sept. 19, 2021, 3 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) 8.9 μg/m3 (38) 38.0
 
Sept. 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 33.0 μg/m3 (31) 11.9 μg/m3 (50) 50.0
 
Sept. 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 51.0 μg/m3 (48) 9.6 μg/m3 (40) 48.0
 
Sept. 19, 2021, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 48.0 μg/m3 (45) 9.9 μg/m3 (42) 45.0
 
Sept. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 30.0 μg/m3 (28) 10.4 μg/m3 (44) 44.0
 
Sept. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 33.0 μg/m3 (31) 8.6 μg/m3 (36) 36.0
 
Sept. 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 35.0 μg/m3 (33) 6.9 μg/m3 (29) 33.0
 
Sept. 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 30.0 μg/m3 (28) 8.1 μg/m3 (34) 34.0
 
Sept. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 33.0 μg/m3 (31) 8.4 μg/m3 (36) 36.0
 
Sept. 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 46.0 μg/m3 (43) 14.0 μg/m3 (55) 55.0
 
Sept. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 37.0 μg/m3 (35) 5.5 μg/m3 (23) 35.0
 
Sept. 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 40.0 μg/m3 (38) 6.9 μg/m3 (29) 38.0
 
Sept. 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 38.0 μg/m3 (36) 7.9 μg/m3 (33) 36.0
 
Sept. 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 40.0 μg/m3 (38) 12.1 μg/m3 (51) 51.0
 
Sept. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 39.0 μg/m3 (37) 7.6 μg/m3 (32) 38.0
 
Sept. 19, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 40.0 μg/m3 (38) 6.2 μg/m3 (26) 41.0
 
Sept. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 47.0 μg/m3 (44) 6.5 μg/m3 (28) 46.0
 
Sept. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 47.0 μg/m3 (44) 5.7 μg/m3 (24) 47.0
 
Sept. 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 41.0 μg/m3 (38) 5.5 μg/m3 (23) 47.0
 
Sept. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 43.0 μg/m3 (40) 8.3 μg/m3 (35) 47.0
 
Sept. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 26.0 μg/m3 (25) 4.5 μg/m3 (19) 47.0
 
Sept. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 22.0 μg/m3 (21) 3.3 μg/m3 (14) 45.0
 
Sept. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 24.0 μg/m3 (23) 4.6 μg/m3 (20) 39.0
 
Sept. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 33.0 μg/m3 (31) 1.8 μg/m3 (8) 31.0
 
Sept. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 28.0 μg/m3 (26) 2.1 μg/m3 (9) 26.0
 
Sept. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 26.0 μg/m3 (25) 5.3 μg/m3 (23) 25.0
 
Sept. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 21.0 μg/m3 (20) 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, noon N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 20.0 μg/m3 (19) 5.7 μg/m3 (24) 24.0
 
Sept. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 19.0 μg/m3 (18) 0.6 μg/m3 (3) 18.0
 
Sept. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 21.0 μg/m3 (20) 1.3 μg/m3 (6) 20.0
 
Sept. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 19.0 μg/m3 (18) 2.3 μg/m3 (10) 18.0
 
Sept. 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 18.0 μg/m3 (17) 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 18.0 μg/m3 (17) 3.8 μg/m3 (16) 17.0
 
Sept. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 22.0 μg/m3 (21) 3.3 μg/m3 (14) 21.0
 
Sept. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 26.0 μg/m3 (25) 4.3 μg/m3 (18) 25.0
 
Sept. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 24.0 μg/m3 (23) 4.8 μg/m3 (20) 23.0
 
Sept. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 6.0 μg/m3 (6) 4.1 μg/m3 (18) 18.0
 
Sept. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 10.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, 1 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) 6.9 μg/m3 (29) 29.0
 
Sept. 18, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 16.0 μg/m3 (15) 2.1 μg/m3 (9) 32.0
 
Sept. 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 10.0 μg/m3 (10) 1.6 μg/m3 (7) 38.0
 
Sept. 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 11.0 μg/m3 (11) 0.0 μg/m3 (0) 41.0
 
Sept. 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 11.0 μg/m3 (11) 0.6 μg/m3 (3) 41.0
 
Sept. 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 29.0 μg/m3 (27) 1.6 μg/m3 (7) 39.0
 
Sept. 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 27.0 μg/m3 (25) 1.1 μg/m3 (5) 38.0
 
Sept. 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 23.0 μg/m3 (22) 1.8 μg/m3 (8) 36.0
 
Sept. 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 25.0 μg/m3 (24) 2.6 μg/m3 (11) 33.0
 
Sept. 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 20.0 μg/m3 (19) 2.9 μg/m3 (13) 28.0
 
Sept. 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 20.0 μg/m3 (19) 5.5 μg/m3 (23) 24.0
 
Sept. 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (19) N/A 19.0
 
Sept. 17, 2021, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 23.0 μg/m3 (22) 6.4 μg/m3 (27) 28.0
 
Sept. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 7.0 μg/m3 (7) 7.4 μg/m3 (31) 32.0
 
Sept. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 14.0 μg/m3 (13) 6.9 μg/m3 (29) 30.0
 
Sept. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 9.0 μg/m3 (9) 9.1 μg/m3 (38) 38.0
 
Sept. 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 12.0 μg/m3 (12) 3.8 μg/m3 (16) 25.0
 
Sept. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 11.0 μg/m3 (11) 3.3 μg/m3 (14) 26.0
 
Sept. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 13.0 μg/m3 (13) 5.0 μg/m3 (21) 34.0
 
Sept. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 95.0 μg/m3 (71) 18.9 μg/m3 (66) 71.0
 
Sept. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 34.0 μg/m3 (32) 8.1 μg/m3 (34) 38.0
 
Sept. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 38.0 μg/m3 (36) 8.6 μg/m3 (36) 41.0
 
Sept. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 38.0 μg/m3 (36) 9.6 μg/m3 (40) 42.0
 
Sept. 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 42.0 μg/m3 (39) 9.6 μg/m3 (40) 40.0
 
Sept. 17, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 58.0 μg/m3 (53) 8.6 μg/m3 (36) 53.0
 
Sept. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 83.0 μg/m3 (65) 10.8 μg/m3 (46) 65.0
 
Sept. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 84.0 μg/m3 (66) 14.2 μg/m3 (56) 66.0
 
Sept. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 11.6 μg/m3 (49) 49.0
 
Sept. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 73.0 μg/m3 (60) 8.8 μg/m3 (37) 60.0
 
Sept. 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 63.0 μg/m3 (55) 9.3 μg/m3 (39) 55.0
 
Sept. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 67.0 μg/m3 (57) 6.4 μg/m3 (27) 57.0
 
Sept. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 67.0 μg/m3 (57) 8.8 μg/m3 (37) 57.0
 
Sept. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 83.0 μg/m3 (65) 8.3 μg/m3 (35) 65.0
 
Sept. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 32.0 μg/m3 (30) 6.2 μg/m3 (26) 35.0
 
Sept. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 24.0 μg/m3 (23) 5.5 μg/m3 (23) 31.0
 
Sept. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 19.0 μg/m3 (18) 6.0 μg/m3 (25) 28.0
 
Sept. 16, 2021, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 27.0
 
Sept. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 6.0 μg/m3 (6) 22.7 μg/m3 (74) 74.0
 
Sept. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 7.0 μg/m3 (7) 4.6 μg/m3 (20) 30.0
 
Sept. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 18.0 μg/m3 (17) 5.0 μg/m3 (21) 32.0
 
Sept. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 17.0 μg/m3 (16) 6.7 μg/m3 (28) 32.0
 
Sept. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 17.0 μg/m3 (16) 11.1 μg/m3 (47) 47.0
 
Sept. 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 20.0 μg/m3 (19) 7.9 μg/m3 (33) 37.0
 
Sept. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 17.0 μg/m3 (16) 6.7 μg/m3 (28) 37.0
 
Sept. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 23.0 μg/m3 (22) 6.9 μg/m3 (29) 35.0
 
Sept. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 20.0 μg/m3 (19) 8.9 μg/m3 (38) 38.0
 
Sept. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 26.0 μg/m3 (25) 7.1 μg/m3 (30) 37.0
 
Sept. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 32.0 μg/m3 (30) 7.9 μg/m3 (33) 36.0
 
Sept. 16, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 39.0 μg/m3 (37) 9.1 μg/m3 (38) 39.0
 
Sept. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 51.0 μg/m3 (48) 10.3 μg/m3 (43) 48.0
 
Sept. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 60.0 μg/m3 (54) 9.6 μg/m3 (40) 54.0
 
Sept. 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 42.0 μg/m3 (39) 5.4 μg/m3 (23) 43.0
 
Sept. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 36.0 μg/m3 (34) 5.5 μg/m3 (23) 43.0
 
Sept. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 27.0 μg/m3 (25) 7.1 μg/m3 (30) 43.0
 
Sept. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 27.0 μg/m3 (25) 6.9 μg/m3 (29) 41.0
 
Sept. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 21.0 μg/m3 (20) 3.0 μg/m3 (13) 39.0
 
Sept. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 23.0 μg/m3 (22) 3.0 μg/m3 (13) 37.0