ID: 2167

AQSQID: 461270001

Site Name: Uc1

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

Updated: March 7, 2021, 2:32 p.m.

Location: Elk Point (475th Ave), SD

Reporting: True, Located: True

Current AQI: 61.0

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
March 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 73.5 μg/m3 (61) 9.4 μg/m3 (40) 61.0
 
March 7, 2021, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 74.5 μg/m3 (61) 11.9 μg/m3 (50) 61.0
 
March 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 70.1 μg/m3 (59) 11.4 μg/m3 (48) 59.0
 
March 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 74.2 μg/m3 (61) 11.2 μg/m3 (47) 61.0
 
March 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 81.8 μg/m3 (65) 16.8 μg/m3 (61) 65.0
 
March 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 83.9 μg/m3 (66) 18.5 μg/m3 (65) 66.0
 
March 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 80.5 μg/m3 (64) 12.1 μg/m3 (51) 64.0
 
March 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 82.2 μg/m3 (65) 15.8 μg/m3 (59) 65.0
 
March 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 85.2 μg/m3 (66) 13.1 μg/m3 (54) 66.0
 
March 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 87.2 μg/m3 (67) 16.6 μg/m3 (61) 67.0
 
March 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 85.4 μg/m3 (67) 15.3 μg/m3 (58) 67.0
 
March 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 86.9 μg/m3 (67) 18.5 μg/m3 (65) 67.0
 
March 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 86.4 μg/m3 (67) 13.1 μg/m3 (54) 67.0
 
March 7, 2021, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 94.1 μg/m3 (71) 16.8 μg/m3 (61) 71.0
 
March 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 85.5 μg/m3 (67) 10.2 μg/m3 (43) 67.0
 
March 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A 90.0 μg/m3 (69) 13.6 μg/m3 (55) 69.0
 
March 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 71.7 μg/m3 (60) 12.0 μg/m3 (50) 60.0
 
March 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 86.1 μg/m3 (67) 9.2 μg/m3 (39) 67.0
 
March 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 90.1 μg/m3 (69) 13.1 μg/m3 (54) 69.0
 
March 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 89.0 μg/m3 (68) 10.4 μg/m3 (44) 68.0
 
March 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 87.2 μg/m3 (67) 10.9 μg/m3 (46) 67.0
 
March 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 84.5 μg/m3 (66) 12.2 μg/m3 (52) 66.0
 
March 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 79.0 μg/m3 (63) 9.4 μg/m3 (40) 63.0
 
March 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 80.3 μg/m3 (64) 10.9 μg/m3 (46) 64.0
 
March 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 79.8 μg/m3 (64) 9.4 μg/m3 (40) 64.0
 
March 6, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 78.0 μg/m3 (63) 10.9 μg/m3 (46) 63.0
 
March 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 76.1 μg/m3 (62) 11.2 μg/m3 (47) 62.0
 
March 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 80.3 μg/m3 (64) 9.7 μg/m3 (41) 64.0
 
March 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 76.1 μg/m3 (62) 9.4 μg/m3 (40) 62.0
 
March 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 75.3 μg/m3 (62) 12.9 μg/m3 (53) 62.0
 
March 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 74.1 μg/m3 (61) 9.9 μg/m3 (42) 61.0
 
March 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 67.6 μg/m3 (58) 9.9 μg/m3 (42) 58.0
 
March 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 60.8 μg/m3 (54) 10.2 μg/m3 (43) 54.0
 
March 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 62.4 μg/m3 (55) 12.6 μg/m3 (53) 55.0
 
March 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 69.3 μg/m3 (59) 10.9 μg/m3 (46) 59.0
 
March 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 65.9 μg/m3 (57) 12.9 μg/m3 (53) 57.0
 
March 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 71.9 μg/m3 (60) 17.5 μg/m3 (63) 63.0
 
March 6, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 80.6 μg/m3 (64) 11.7 μg/m3 (49) 64.0
 
March 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 86.1 μg/m3 (67) 9.7 μg/m3 (41) 67.0
 
March 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 82.6 μg/m3 (65) 8.7 μg/m3 (37) 65.0
 
March 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 85.6 μg/m3 (67) 10.5 μg/m3 (44) 67.0
 
March 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 85.2 μg/m3 (66) 12.2 μg/m3 (52) 66.0
 
March 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 75.4 μg/m3 (62) 13.1 μg/m3 (54) 62.0
 
March 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 86.8 μg/m3 (67) 8.7 μg/m3 (37) 67.0
 
March 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 76.5 μg/m3 (62) 8.7 μg/m3 (37) 62.0
 
March 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 73.1 μg/m3 (60) 8.9 μg/m3 (38) 60.0
 
March 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 74.2 μg/m3 (61) 12.6 μg/m3 (53) 61.0
 
March 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 54.8 μg/m3 (51) 10.4 μg/m3 (44) 51.0
 
March 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 60.2 μg/m3 (54) 14.3 μg/m3 (56) 56.0
 
March 5, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 60.7 μg/m3 (54) 13.8 μg/m3 (55) 55.0
 
March 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 64.5 μg/m3 (56) 13.6 μg/m3 (55) 56.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 62.9 μg/m3 (55) 14.8 μg/m3 (57) 57.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 62.4 μg/m3 (55) 17.3 μg/m3 (62) 62.0
 
March 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 65.5 μg/m3 (57) 13.1 μg/m3 (54) 57.0
 
March 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 68.9 μg/m3 (58) 20.2 μg/m3 (69) 69.0
 
March 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 71.1 μg/m3 (59) 23.7 μg/m3 (76) 76.0
 
March 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 76.4 μg/m3 (62) 24.6 μg/m3 (78) 78.0
 
March 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 89.3 μg/m3 (68) 27.1 μg/m3 (83) 83.0
 
March 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 83.2 μg/m3 (65) 16.6 μg/m3 (61) 65.0
 
March 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 78.2 μg/m3 (63) 15.8 μg/m3 (59) 63.0
 
March 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 79.9 μg/m3 (64) 17.1 μg/m3 (62) 64.0
 
March 5, 2021, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 79.2 μg/m3 (63) 19.3 μg/m3 (67) 67.0
 
March 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 73.6 μg/m3 (61) 12.4 μg/m3 (52) 61.0
 
March 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 61.6 μg/m3 (55) 6.5 μg/m3 (28) 55.0
 
March 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 58.7 μg/m3 (53) 7.5 μg/m3 (32) 53.0
 
March 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 56.7 μg/m3 (52) 10.4 μg/m3 (44) 52.0
 
March 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 59.9 μg/m3 (54) 9.0 μg/m3 (38) 54.0
 
March 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 62.1 μg/m3 (55) 12.2 μg/m3 (52) 55.0
 
March 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 61.9 μg/m3 (55) 7.7 μg/m3 (33) 55.0
 
March 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 57.3 μg/m3 (53) 7.5 μg/m3 (32) 53.0
 
March 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 55.6 μg/m3 (52) 8.0 μg/m3 (34) 52.0
 
March 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 57.5 μg/m3 (53) 7.2 μg/m3 (31) 53.0
 
March 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 56.9 μg/m3 (52) 6.0 μg/m3 (25) 52.0
 
March 4, 2021, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 59.1 μg/m3 (54) 6.9 μg/m3 (29) 54.0
 
March 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 58.8 μg/m3 (53) 7.9 μg/m3 (33) 53.0
 
March 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 60.9 μg/m3 (54) 13.9 μg/m3 (55) 55.0
 
March 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 56.2 μg/m3 (52) 12.9 μg/m3 (53) 53.0
 
March 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 73.7 μg/m3 (61) 7.5 μg/m3 (32) 61.0
 
March 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 57.7 μg/m3 (53) 7.0 μg/m3 (30) 53.0
 
March 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 60.8 μg/m3 (54) 9.2 μg/m3 (39) 54.0
 
March 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 54.3 μg/m3 (51) 7.5 μg/m3 (32) 51.0
 
March 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 63.4 μg/m3 (56) 9.9 μg/m3 (42) 56.0
 
March 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 57.3 μg/m3 (53) 9.2 μg/m3 (39) 53.0
 
March 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 61.7 μg/m3 (55) 9.2 μg/m3 (39) 55.0
 
March 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 64.9 μg/m3 (56) 7.0 μg/m3 (30) 56.0
 
March 4, 2021, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 65.7 μg/m3 (57) 5.6 μg/m3 (24) 57.0
 
March 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 65.6 μg/m3 (57) 4.9 μg/m3 (21) 57.0
 
March 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 58.7 μg/m3 (53) 4.4 μg/m3 (19) 53.0
 
March 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 67.8 μg/m3 (58) 3.2 μg/m3 (14) 58.0
 
March 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 61.8 μg/m3 (55) 4.9 μg/m3 (21) 55.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 54.2 μg/m3 (51) 2.9 μg/m3 (13) 51.0
 
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 55.9 μg/m3 (52) 4.2 μg/m3 (18) 52.0
 
March 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 52.8 μg/m3 (49) 5.6 μg/m3 (24) 49.0
 
March 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 33.6 μg/m3 (32) 2.4 μg/m3 (10) 32.0
 
March 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 32.9 μg/m3 (31) 1.4 μg/m3 (6) 31.0
 
March 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 34.7 μg/m3 (33) 3.9 μg/m3 (17) 33.0
 
March 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 35.8 μg/m3 (34) 4.4 μg/m3 (19) 34.0
 
March 3, 2021, noon N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 47.0 μg/m3 (44) 1.4 μg/m3 (6) 44.0
 
March 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 49.1 μg/m3 (46) 2.9 μg/m3 (13) 46.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 49.2 μg/m3 (46) 1.4 μg/m3 (6) 46.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 48.3 μg/m3 (45) 4.1 μg/m3 (18) 45.0
 
March 3, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 51.0 μg/m3 (48) 6.5 μg/m3 (28) 48.0
 
March 3, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 48.3 μg/m3 (45) 1.6 μg/m3 (7) 45.0
 
March 3, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 51.0 μg/m3 (48) 2.7 μg/m3 (12) 48.0
 
March 3, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 52.0 μg/m3 (49) 2.9 μg/m3 (13) 49.0
 
March 3, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 51.3 μg/m3 (48) 2.6 μg/m3 (11) 48.0
 
March 3, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 53.8 μg/m3 (50) 2.9 μg/m3 (13) 50.0
 
March 3, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 53.2 μg/m3 (50) 4.6 μg/m3 (20) 50.0
 
March 3, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 56.6 μg/m3 (52) 4.9 μg/m3 (21) 52.0
 
March 3, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 40.0 μg/m3 (38) 4.6 μg/m3 (20) 38.0
 
March 2, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 41.2 μg/m3 (39) 5.4 μg/m3 (23) 39.0
 
March 2, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 37.5 μg/m3 (35) 2.0 μg/m3 (9) 37.0
 
March 2, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 43.9 μg/m3 (41) 0.2 μg/m3 (1) 41.0
 
March 2, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 49.0 μg/m3 (46) 1.5 μg/m3 (7) 46.0
 
March 2, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 52.6 μg/m3 (49) 3.9 μg/m3 (17) 49.0
 
March 2, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 43.6 μg/m3 (41) 3.7 μg/m3 (16) 41.0
 
March 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 46.3 μg/m3 (43) 4.4 μg/m3 (19) 43.0
 
March 2, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 61.4 μg/m3 (55) 2.7 μg/m3 (12) 55.0
 
March 2, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 53.5 μg/m3 (50) 5.3 μg/m3 (23) 50.0
 
March 2, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 56.0 μg/m3 (52) 7.5 μg/m3 (32) 52.0
 
March 2, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 55.7 μg/m3 (52) 9.2 μg/m3 (39) 52.0
 
March 2, 2021, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 55.7 μg/m3 (52) 10.9 μg/m3 (46) 52.0
 
March 2, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 59.1 μg/m3 (54) 10.9 μg/m3 (46) 54.0
 
March 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 59.0 μg/m3 (53) 13.6 μg/m3 (55) 55.0
 
March 2, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 47.4 μg/m3 (44) 11.4 μg/m3 (48) 48.0
 
March 2, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 45.1 μg/m3 (42) 7.7 μg/m3 (33) 42.0
 
March 2, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 42.3 μg/m3 (40) 7.4 μg/m3 (31) 40.0
 
March 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 43.4 μg/m3 (41) 7.9 μg/m3 (33) 41.0
 
March 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 41.3 μg/m3 (39) 9.2 μg/m3 (39) 39.0
 
March 2, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 41.5 μg/m3 (39) 13.6 μg/m3 (55) 55.0
 
March 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 40.6 μg/m3 (38) 12.2 μg/m3 (52) 52.0
 
March 2, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 43.5 μg/m3 (41) 4.9 μg/m3 (21) 41.0
 
March 2, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 38.9 μg/m3 (37) 5.8 μg/m3 (25) 37.0
 
March 2, 2021, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 41.8 μg/m3 (39) 8.2 μg/m3 (35) 39.0
 
March 1, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 35.9 μg/m3 (34) 9.7 μg/m3 (41) 41.0
 
March 1, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 37.4 μg/m3 (35) 10.7 μg/m3 (45) 45.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 38.3 μg/m3 (36) 5.4 μg/m3 (23) 36.0
 
March 1, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 57.7 μg/m3 (53) 5.4 μg/m3 (23) 53.0
 
March 1, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 52.3 μg/m3 (49) 9.2 μg/m3 (39) 49.0
 
March 1, 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) 8.9 μg/m3 (38) 50.0
 
March 1, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 39.2 μg/m3 (37) 8.9 μg/m3 (38) 38.0
 
March 1, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 40.5 μg/m3 (38) 6.7 μg/m3 (28) 38.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 39.2 μg/m3 (37) 7.9 μg/m3 (33) 37.0
 
March 1, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 39.8 μg/m3 (37) 11.7 μg/m3 (49) 49.0
 
March 1, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 38.8 μg/m3 (36) 10.7 μg/m3 (45) 45.0
 
March 1, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 35.4 μg/m3 (33) 8.4 μg/m3 (36) 36.0
 
March 1, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 36.9 μg/m3 (35) 7.7 μg/m3 (33) 35.0
 
March 1, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 37.1 μg/m3 (35) 5.1 μg/m3 (22) 35.0
 
March 1, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 40.1 μg/m3 (38) 4.8 μg/m3 (20) 38.0
 
March 1, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 35.7 μg/m3 (34) 7.9 μg/m3 (33) 34.0
 
March 1, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 39.1 μg/m3 (37) 9.7 μg/m3 (41) 41.0
 
March 1, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 35.5 μg/m3 (33) 9.4 μg/m3 (40) 40.0
 
March 1, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 38.9 μg/m3 (37) 8.4 μg/m3 (36) 37.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 38.3 μg/m3 (36) 8.7 μg/m3 (37) 37.0
 
March 1, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 40.3 μg/m3 (38) 8.0 μg/m3 (34) 38.0
 
March 1, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 37.9 μg/m3 (36) 7.0 μg/m3 (30) 36.0
 
March 1, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 28.4 μg/m3 (27) 6.7 μg/m3 (28) 28.0
 
March 1, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 39.9 μg/m3 (37) 6.0 μg/m3 (25) 37.0
 
Feb. 28, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 33.5 μg/m3 (32) 7.9 μg/m3 (33) 35.0
 
Feb. 28, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 33.3 μg/m3 (31) 4.4 μg/m3 (19) 36.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 33.6 μg/m3 (32) 3.4 μg/m3 (15) 35.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 35.2 μg/m3 (33) 3.4 μg/m3 (15) 34.0
 
Feb. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 35.2 μg/m3 (33) 6.0 μg/m3 (25) 33.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 32.8 μg/m3 (31) 6.2 μg/m3 (26) 31.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 33.7 μg/m3 (32) 6.7 μg/m3 (28) 32.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 35.4 μg/m3 (33) 8.2 μg/m3 (35) 35.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 37.6 μg/m3 (35) 7.5 μg/m3 (32) 35.0
 
Feb. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 41.6 μg/m3 (39) 9.9 μg/m3 (42) 42.0