ID: 1328

AQSQID: 380570004

Site Name: Beulah North

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

Updated: March 8, 2021, 11:32 p.m.

Location: Beulah (45th Ave Swest), ND

Reporting: True, Located: True

Current AQI: 41.0

Beulah (45th Ave Swest) ND, US: 47.2986, -101.7669

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 8, 2021, 9 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 8, 2021, 8 p.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 8.1 μg/m3 (34) 43.0
 
March 8, 2021, 7 p.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 6.6 μg/m3 (28) 43.0
 
March 8, 2021, 6 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 8.9 μg/m3 (38) 41.0
 
March 8, 2021, 5 p.m. 2.6 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A 12.6 μg/m3 (53) 53.0
 
March 8, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 25.1 μg/m3 (79) 79.0
 
March 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 30.0
 
March 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.5 μg/m3 (44) 44.0
 
March 8, 2021, 1 p.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 10.1 μg/m3 (43) 43.0
 
March 8, 2021, noon 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 8, 2021, 11 a.m. 2.1 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 8.0 μg/m3 (34) 34.0
 
March 8, 2021, 10 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 8, 2021, 9 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 9.4 μg/m3 (40) 40.0
 
March 8, 2021, 8 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 9.4 μg/m3 (40) 40.0
 
March 8, 2021, 7 a.m. 2.1 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 11.6 μg/m3 (49) 49.0
 
March 8, 2021, 6 a.m. 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 8, 2021, 5 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 12.9 μg/m3 (53) 53.0
 
March 8, 2021, 4 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 15.7 μg/m3 (59) 59.0
 
March 8, 2021, 3 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 13.7 μg/m3 (55) 55.0
 
March 8, 2021, 2 a.m. 3.3 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 11.1 μg/m3 (47) 47.0
 
March 8, 2021, 1 a.m. 4.5 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 8, 2021, midnight 4.8 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 10.9 μg/m3 (46) 46.0
 
March 7, 2021, 11 p.m. 3.6 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 7.6 μg/m3 (32) 41.0
 
March 7, 2021, 10 p.m. 3.2 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 6.5 μg/m3 (28) 42.0
 
March 7, 2021, 9 p.m. 4.0 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 4.7 μg/m3 (20) 41.0
 
March 7, 2021, 8 p.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 7.0 μg/m3 (30) 41.0
 
March 7, 2021, 7 p.m. 3.3 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 7.8 μg/m3 (33) 38.0
 
March 7, 2021, 6 p.m. 4.0 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 8.7 μg/m3 (37) 37.0
 
March 7, 2021, 5 p.m. 4.7 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 7, 2021, 4 p.m. 3.8 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 11.1 μg/m3 (47) 47.0
 
March 7, 2021, 3 p.m. 3.7 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 10.6 μg/m3 (45) 45.0
 
March 7, 2021, 2 p.m. 3.5 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 10.3 μg/m3 (43) 43.0
 
March 7, 2021, 1 p.m. 3.5 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 7, 2021, noon 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 7, 2021, 11 a.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 29.0 ppb (27) N/A N/A 11.2 μg/m3 (47) 47.0
 
March 7, 2021, 10 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 7, 2021, 9 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 17.1 μg/m3 (62) 62.0
 
March 7, 2021, 8 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 22.3 μg/m3 (73) 73.0
 
March 7, 2021, 7 a.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 23.9 μg/m3 (76) 76.0
 
March 7, 2021, 6 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 25.9 μg/m3 (81) 81.0
 
March 7, 2021, 5 a.m. 4.0 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 26.3 μg/m3 (81) 81.0
 
March 7, 2021, 4 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 26.9 μg/m3 (83) 83.0
 
March 7, 2021, 3 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 27.4 μg/m3 (84) 84.0
 
March 7, 2021, 2 a.m. 3.7 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 26.5 μg/m3 (82) 82.0
 
March 7, 2021, 1 a.m. 3.6 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 26.6 μg/m3 (82) 82.0
 
March 7, 2021, midnight 3.7 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 25.4 μg/m3 (79) 79.0
 
March 6, 2021, 11 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 26.7 μg/m3 (82) 82.0
 
March 6, 2021, 10 p.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 25.2 μg/m3 (79) 79.0
 
March 6, 2021, 9 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 24.7 μg/m3 (78) 78.0
 
March 6, 2021, 8 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 24.4 μg/m3 (77) 77.0
 
March 6, 2021, 7 p.m. 3.6 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 24.3 μg/m3 (77) 77.0
 
March 6, 2021, 6 p.m. 3.3 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 19.6 μg/m3 (67) 67.0
 
March 6, 2021, 5 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 18.8 μg/m3 (66) 66.0
 
March 6, 2021, 4 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 18.9 μg/m3 (66) 66.0
 
March 6, 2021, 3 p.m. 3.4 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 17.7 μg/m3 (63) 63.0
 
March 6, 2021, 2 p.m. 3.4 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 14.2 μg/m3 (56) 56.0
 
March 6, 2021, 1 p.m. 3.4 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 15.4 μg/m3 (58) 58.0
 
March 6, 2021, noon 3.5 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 21.5 μg/m3 (71) 71.0
 
March 6, 2021, 11 a.m. 3.5 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 24.6 μg/m3 (78) 78.0
 
March 6, 2021, 10 a.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 25.8 μg/m3 (80) 80.0
 
March 6, 2021, 9 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 26.5 μg/m3 (82) 82.0
 
March 6, 2021, 8 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 27.8 μg/m3 (85) 85.0
 
March 6, 2021, 7 a.m. 3.2 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 28.1 μg/m3 (85) 85.0
 
March 6, 2021, 6 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 24.6 μg/m3 (78) 78.0
 
March 6, 2021, 5 a.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 23.2 μg/m3 (75) 75.0
 
March 6, 2021, 4 a.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 21.3 μg/m3 (71) 71.0
 
March 6, 2021, 3 a.m. 4.3 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 21.0 μg/m3 (70) 70.0
 
March 6, 2021, 2 a.m. 4.8 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 21.1 μg/m3 (70) 70.0
 
March 6, 2021, 1 a.m. 6.6 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 22.3 μg/m3 (73) 73.0
 
March 6, 2021, midnight 6.6 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 23.0 μg/m3 (74) 74.0
 
March 5, 2021, 11 p.m. 4.6 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 19.6 μg/m3 (67) 67.0
 
March 5, 2021, 10 p.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 19.6 μg/m3 (67) 67.0
 
March 5, 2021, 9 p.m. 3.5 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 17.8 μg/m3 (63) 63.0
 
March 5, 2021, 8 p.m. 4.3 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 20.2 μg/m3 (69) 69.0
 
March 5, 2021, 7 p.m. 4.5 ppb (5) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 23.1 μg/m3 (75) 75.0
 
March 5, 2021, 6 p.m. 3.3 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 18.3 μg/m3 (65) 65.0
 
March 5, 2021, 5 p.m. 3.9 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 15.6 μg/m3 (59) 59.0
 
March 5, 2021, 4 p.m. 4.5 ppb (5) 1.5 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 3 p.m. 7.1 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 11.8 μg/m3 (50) 50.0
 
March 5, 2021, 2 p.m. 4.9 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 14.0 ppb (13) N/A N/A 12.8 μg/m3 (53) 53.0
 
March 5, 2021, 1 p.m. 6.7 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 12.0 ppb (12) N/A N/A 12.5 μg/m3 (52) 52.0
 
March 5, 2021, noon 6.3 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 11.0 ppb (11) N/A N/A 12.9 μg/m3 (53) 53.0
 
March 5, 2021, 11 a.m. 5.5 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 14.0 ppb (13) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 5, 2021, 10 a.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 16.0 ppb (15) N/A N/A 10.8 μg/m3 (46) 46.0
 
March 5, 2021, 9 a.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 18.0 ppb (17) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 5, 2021, 8 a.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 12.9 μg/m3 (53) 53.0
 
March 5, 2021, 7 a.m. 3.3 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 17.0 ppb (16) N/A N/A 12.5 μg/m3 (52) 52.0
 
March 5, 2021, 6 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 16.0 ppb (15) N/A N/A 17.8 μg/m3 (63) 63.0
 
March 5, 2021, 5 a.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 18.0 ppb (17) N/A N/A 17.6 μg/m3 (63) 63.0
 
March 5, 2021, 4 a.m. 4.4 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 19.0 ppb (18) N/A N/A 17.0 μg/m3 (62) 62.0
 
March 5, 2021, 3 a.m. 3.6 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 17.3 μg/m3 (62) 62.0
 
March 5, 2021, 2 a.m. 3.2 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 15.9 μg/m3 (59) 59.0
 
March 5, 2021, 1 a.m. 4.9 ppb (5) 2.6 ppb (3) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A N/A 27.0
 
March 5, 2021, midnight 4.9 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 68.6 μg/m3 (158) 158.0
 
March 4, 2021, 11 p.m. 8.7 ppb (9) 3.6 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 31.2 μg/m3 (92) 92.0
 
March 4, 2021, 10 p.m. 6.2 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 15.4 μg/m3 (58) 58.0
 
March 4, 2021, 9 p.m. 5.4 ppb (6) 1.9 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 14.3 μg/m3 (56) 56.0
 
March 4, 2021, 8 p.m. 5.5 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 15.3 μg/m3 (58) 58.0
 
March 4, 2021, 7 p.m. 11.8 ppb (12) 4.6 ppb (5) N/A 7.0 ppb (7) N/A 4.0 ppb (6) 28.0 ppb (26) N/A N/A 20.7 μg/m3 (70) 70.0
 
March 4, 2021, 6 p.m. 7.9 ppb (8) 3.5 ppb (4) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 24.0 ppb (23) N/A N/A 22.6 μg/m3 (74) 74.0
 
March 4, 2021, 5 p.m. 4.5 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 19.1 μg/m3 (66) 66.0
 
March 4, 2021, 4 p.m. 6.8 ppb (7) 3.2 ppb (4) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 20.3 μg/m3 (69) 69.0
 
March 4, 2021, 3 p.m. 6.3 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 19.4 μg/m3 (67) 67.0
 
March 4, 2021, 2 p.m. 8.6 ppb (9) 3.2 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 11.0 ppb (11) N/A N/A 18.8 μg/m3 (66) 66.0
 
March 4, 2021, 1 p.m. 15.4 ppb (15) 5.5 ppb (6) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 7.0 ppb (7) N/A N/A 20.8 μg/m3 (70) 70.0
 
March 4, 2021, noon 13.1 ppb (13) 4.9 ppb (5) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 11.0 ppb (11) N/A N/A 18.3 μg/m3 (65) 65.0
 
March 4, 2021, 11 a.m. 4.0 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 16.9 μg/m3 (62) 62.0
 
March 4, 2021, 10 a.m. 4.1 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 19.0 ppb (18) N/A N/A 16.6 μg/m3 (61) 61.0
 
March 4, 2021, 9 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 16.2 μg/m3 (60) 60.0
 
March 4, 2021, 8 a.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 15.1 μg/m3 (58) 58.0
 
March 4, 2021, 7 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 14.1 μg/m3 (56) 56.0
 
March 4, 2021, 6 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 14.6 μg/m3 (57) 57.0
 
March 4, 2021, 5 a.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 16.8 μg/m3 (61) 61.0
 
March 4, 2021, 4 a.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 19.2 μg/m3 (66) 66.0
 
March 4, 2021, 3 a.m. 4.1 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 31.0 ppb (29) N/A N/A 15.4 μg/m3 (58) 58.0
 
March 4, 2021, 2 a.m. 2.5 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 23.1 μg/m3 (75) 75.0
 
March 4, 2021, 1 a.m. 6.7 ppb (7) 2.4 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 30.0 μg/m3 (89) 89.0
 
March 4, 2021, midnight 6.1 ppb (6) 2.6 ppb (3) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 68.2 μg/m3 (158) 158.0
 
March 3, 2021, 11 p.m. 5.8 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A 3.0 ppb (5) 39.0 ppb (37) N/A N/A 45.7 μg/m3 (127) 127.0
 
March 3, 2021, 10 p.m. 7.3 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A 3.0 ppb (5) 39.0 ppb (37) N/A N/A 15.7 μg/m3 (59) 59.0
 
March 3, 2021, 9 p.m. 4.7 ppb (5) 2.6 ppb (3) N/A 2.0 ppb (2) N/A 3.0 ppb (5) 40.0 ppb (38) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, 8 p.m. 2.6 ppb (3) 1.3 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 6.7 μg/m3 (28) 38.0
 
March 3, 2021, 7 p.m. 2.1 ppb (2) 1.1 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 8.7 μg/m3 (37) 37.0
 
March 3, 2021, 6 p.m. 3.3 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 3, 2021, 5 p.m. 2.8 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 8.9 μg/m3 (38) 38.0
 
March 3, 2021, 4 p.m. 2.5 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 10.4 μg/m3 (44) 44.0
 
March 3, 2021, 3 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 11.2 μg/m3 (47) 47.0
 
March 3, 2021, 2 p.m. 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 8.8 μg/m3 (37) 37.0
 
March 3, 2021, 1 p.m. 5.2 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 3, 2021, noon 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 7.7 μg/m3 (33) 33.0
 
March 3, 2021, 11 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.1 μg/m3 (30) 30.0
 
March 3, 2021, 10 a.m. 2.3 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.3 μg/m3 (31) 31.0
 
March 3, 2021, 9 a.m. 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 7.0 μg/m3 (30) 31.0
 
March 3, 2021, 8 a.m. 3.0 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (30) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 3, 2021, 7 a.m. 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 3, 2021, 6 a.m. 2.6 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 10.8 μg/m3 (46) 46.0
 
March 3, 2021, 5 a.m. 4.7 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 10.6 μg/m3 (45) 45.0
 
March 3, 2021, 4 a.m. 2.6 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 3, 2021, 3 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 9.2 μg/m3 (39) 39.0
 
March 3, 2021, 2 a.m. 4.3 ppb (5) 1.8 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 10.6 μg/m3 (45) 45.0
 
March 3, 2021, 1 a.m. 3.1 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 25.6 μg/m3 (80) 80.0
 
March 3, 2021, midnight 7.5 ppb (8) 2.7 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 42.2 μg/m3 (118) 118.0
 
March 2, 2021, 11 p.m. 4.6 ppb (5) 2.7 ppb (3) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 15.5 μg/m3 (59) 59.0
 
March 2, 2021, 10 p.m. 3.7 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 39.0 ppb (37) N/A N/A 10.3 μg/m3 (43) 43.0
 
March 2, 2021, 9 p.m. 8.1 ppb (8) 3.2 ppb (4) N/A 5.0 ppb (5) N/A 12.0 ppb (18) 36.0 ppb (34) N/A N/A 15.4 μg/m3 (58) 58.0
 
March 2, 2021, 8 p.m. 3.1 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 2, 2021, 7 p.m. 3.3 ppb (4) 1.9 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 2, 2021, 6 p.m. 2.9 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 9.2 μg/m3 (39) 39.0
 
March 2, 2021, 5 p.m. 2.5 ppb (3) 1.6 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 2, 2021, 4 p.m. 2.6 ppb (3) 1.2 ppb (2) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 7.7 μg/m3 (33) 33.0
 
March 2, 2021, 3 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.6 μg/m3 (24) 25.0
 
March 2, 2021, 2 p.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 7.5 μg/m3 (32) 32.0
 
March 2, 2021, 1 p.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 4.4 μg/m3 (19) 22.0
 
March 2, 2021, noon 1.5 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 3.1 μg/m3 (13) 23.0
 
March 2, 2021, 11 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 3.6 μg/m3 (16) 22.0
 
March 2, 2021, 10 a.m. 1.3 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A 3.2 μg/m3 (14) 22.0
 
March 2, 2021, 9 a.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 3.5 μg/m3 (15) 23.0
 
March 2, 2021, 8 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 4.1 μg/m3 (18) 24.0
 
March 2, 2021, 7 a.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 4.2 μg/m3 (18) 25.0
 
March 2, 2021, 6 a.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 4.9 μg/m3 (21) 26.0
 
March 2, 2021, 5 a.m. 1.9 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 4.6 μg/m3 (20) 26.0
 
March 2, 2021, 4 a.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
March 2, 2021, 3 a.m. 1.9 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 7.5 μg/m3 (32) 32.0
 
March 2, 2021, 2 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 2, 2021, 1 a.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 9.7 μg/m3 (41) 41.0
 
March 2, 2021, midnight 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 1, 2021, 11 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 9.7 μg/m3 (41) 41.0
 
March 1, 2021, 10 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 10.5 μg/m3 (44) 44.0