ID: 2421

AQSQID: 300750001

Site Name: Broadus

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

Updated: Dec. 9, 2021, 8:06 a.m.

Location: Broadus (Big Powder Riv E Rd), MT

Reporting: True, Located: True

Current AQI: 35.0

Broadus (Big Powder Riv E Rd) MT, US: 45.440295, -105.37028

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Dec. 9, 2021, 6 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) 3.1 μg/m3 (13) 35.0
 
Dec. 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 9.0 μg/m3 (9) 7.1 μg/m3 (30) 35.0
 
Dec. 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 14.0 μg/m3 (13) 1.0 μg/m3 (5) 20.0
 
Dec. 9, 2021, 3 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) 3.3 μg/m3 (14) 19.0
 
Dec. 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 7.0 μg/m3 (7) -1.4 μg/m3 (0) 25.0
 
Dec. 9, 2021, 1 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) 2.5 μg/m3 (11) 25.0
 
Dec. 9, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 7.0 μg/m3 (7) 0.0 μg/m3 (0) 25.0
 
Dec. 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 6.0 μg/m3 (6) -2.9 μg/m3 (0) 25.0
 
Dec. 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 0.9 μg/m3 (4) 24.0
 
Dec. 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 1.0 μg/m3 (1) -3.0 μg/m3 (0) 25.0
 
Dec. 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 5.0 μg/m3 (5) 3.1 μg/m3 (13) 26.0
 
Dec. 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 2.0 μg/m3 (2) 2.6 μg/m3 (11) 26.0
 
Dec. 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 7.0 μg/m3 (7) 0.4 μg/m3 (2) 26.0
 
Dec. 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 9.0 μg/m3 (9) 13.3 μg/m3 (54) 54.0
 
Dec. 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) 13.1 μg/m3 (54) 54.0
 
Dec. 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 1.0 μg/m3 (1) 0.6 μg/m3 (3) 27.0
 
Dec. 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 1.0 μg/m3 (1) -0.6 μg/m3 (0) 24.0
 
Dec. 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) -2.5 μg/m3 (0) 25.0
 
Dec. 8, 2021, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 26.0
 
Dec. 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 1.0 μg/m3 (1) 3.9 μg/m3 (17) 26.0
 
Dec. 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 1.0 μg/m3 (1) 0.6 μg/m3 (3) 25.0
 
Dec. 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 7.0 μg/m3 (7) 2.1 μg/m3 (9) 24.0
 
Dec. 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 2.0 μg/m3 (2) -3.8 μg/m3 (0) 25.0
 
Dec. 8, 2021, 7 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
 
Dec. 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 1.0 μg/m3 (1) -0.1 μg/m3 (0) 26.0
 
Dec. 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 4.0 μg/m3 (4) 0.1 μg/m3 (1) 27.0
 
Dec. 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 2.0 μg/m3 (2) 1.5 μg/m3 (7) 28.0
 
Dec. 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 1.0 μg/m3 (1) 1.4 μg/m3 (6) 29.0
 
Dec. 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 2.0 μg/m3 (2) 2.2 μg/m3 (10) 29.0
 
Dec. 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 3.0 μg/m3 (3) -0.7 μg/m3 (0) 30.0
 
Dec. 8, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 3.2 μg/m3 (14) 29.0
 
Dec. 7, 2021, 11 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
 
Dec. 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.0 μg/m3 (0) 2.1 μg/m3 (9) 32.0
 
Dec. 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 1.0 μg/m3 (1) 3.5 μg/m3 (15) 35.0
 
Dec. 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 4.0 μg/m3 (4) 4.3 μg/m3 (18) 35.0
 
Dec. 7, 2021, 6 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) 8.3 μg/m3 (35) 35.0
 
Dec. 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 20.0 μg/m3 (19) 14.6 μg/m3 (57) 57.0
 
Dec. 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 22.0 μg/m3 (21) 9.3 μg/m3 (39) 39.0
 
Dec. 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 4.1 μg/m3 (18) 18.0
 
Dec. 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -0.1 μg/m3 (0) 2.0
 
Dec. 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 0.4 μg/m3 (2) 2.0
 
Dec. 7, 2021, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 32.0
 
Dec. 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 1.0 μg/m3 (1) 0.1 μg/m3 (1) 32.0
 
Dec. 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 3.0 μg/m3 (3) 0.4 μg/m3 (2) 33.0
 
Dec. 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 34.0
 
Dec. 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A -1.0 μg/m3 (0) -2.6 μg/m3 (0) 33.0
 
Dec. 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 7.0 μg/m3 (7) 3.4 μg/m3 (15) 34.0
 
Dec. 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 6.0 μg/m3 (6) 6.6 μg/m3 (28) 32.0
 
Dec. 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 17.0 μg/m3 (16) 4.6 μg/m3 (20) 24.0
 
Dec. 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 30.0 μg/m3 (28) 6.1 μg/m3 (26) 28.0
 
Dec. 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 38.0 μg/m3 (36) 4.7 μg/m3 (20) 36.0
 
Dec. 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 68.0 μg/m3 (58) 7.0 μg/m3 (30) 58.0
 
Dec. 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 18.8 μg/m3 (66) 66.0
 
Dec. 7, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 60.0 μg/m3 (54) 7.4 μg/m3 (31) 54.0
 
Dec. 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 13.0 μg/m3 (13) 1.2 μg/m3 (5) 29.0
 
Dec. 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 7.3 μg/m3 (31) 31.0
 
Dec. 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 7.0 μg/m3 (7) 4.3 μg/m3 (18) 27.0
 
Dec. 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 7.0 μg/m3 (7) 12.0 μg/m3 (50) 50.0
 
Dec. 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 0.0 μg/m3 (0) 4.5 μg/m3 (19) 28.0
 
Dec. 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.0 μg/m3 (4) 10.8 μg/m3 (46) 46.0
 
Dec. 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 9.0 μg/m3 (9) 9.1 μg/m3 (38) 38.0
 
Dec. 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 4.0 μg/m3 (4) 7.8 μg/m3 (33) 33.0
 
Dec. 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 12.0 μg/m3 (12) 5.2 μg/m3 (22) 23.0
 
Dec. 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 10.0 μg/m3 (10) 4.8 μg/m3 (20) 21.0
 
Dec. 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 13.0 μg/m3 (13) 9.8 μg/m3 (41) 41.0
 
Dec. 6, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 20.0 μg/m3 (19) 3.9 μg/m3 (17) 19.0
 
Dec. 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 10.0 μg/m3 (10) 3.6 μg/m3 (16) 16.0
 
Dec. 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 6.0 μg/m3 (6) 8.4 μg/m3 (36) 36.0
 
Dec. 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 7.0 μg/m3 (7) 7.8 μg/m3 (33) 33.0
 
Dec. 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 3.0 μg/m3 (3) 2.5 μg/m3 (11) 23.0
 
Dec. 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 4.0 μg/m3 (4) -4.6 μg/m3 (0) 25.0
 
Dec. 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 10.0 μg/m3 (10) 7.4 μg/m3 (31) 31.0
 
Dec. 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 14.0 μg/m3 (13) 7.4 μg/m3 (31) 31.0
 
Dec. 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 26.0 μg/m3 (25) 12.5 μg/m3 (52) 52.0
 
Dec. 6, 2021, 3 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) 8.0 μg/m3 (34) 34.0
 
Dec. 6, 2021, 2 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) 8.8 μg/m3 (37) 37.0
 
Dec. 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 45.0 μg/m3 (42) 10.2 μg/m3 (43) 43.0
 
Dec. 6, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 51.0 μg/m3 (48) 3.5 μg/m3 (15) 48.0
 
Dec. 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 87.0 μg/m3 (67) 0.2 μg/m3 (1) 67.0
 
Dec. 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 97.0 μg/m3 (72) 5.3 μg/m3 (23) 72.0
 
Dec. 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 99.0 μg/m3 (73) 9.9 μg/m3 (42) 73.0
 
Dec. 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 75.0 μg/m3 (61) 7.8 μg/m3 (33) 61.0
 
Dec. 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 83.0 μg/m3 (65) 7.7 μg/m3 (33) 65.0
 
Dec. 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 61.0 μg/m3 (54) 5.7 μg/m3 (24) 54.0
 
Dec. 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 63.0 μg/m3 (55) 9.6 μg/m3 (40) 55.0
 
Dec. 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 54.0 μg/m3 (50) 9.1 μg/m3 (38) 50.0
 
Dec. 5, 2021, 3 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) 9.1 μg/m3 (38) 38.0
 
Dec. 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 19.0 μg/m3 (18) 2.7 μg/m3 (12) 35.0
 
Dec. 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 15.0 μg/m3 (14) -0.7 μg/m3 (0) 33.0
 
Dec. 5, 2021, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 5.0 μg/m3 (5) 2.4 μg/m3 (10) 37.0
 
Dec. 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) 0.4 μg/m3 (2) 35.0
 
Dec. 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) 1.8 μg/m3 (8) 34.0
 
Dec. 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -3.0 μg/m3 (0) 2.3 μg/m3 (10) 34.0
 
Dec. 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.3 μg/m3 (27) 32.0
 
Dec. 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.0 μg/m3 (0) 16.1 μg/m3 (60) 60.0
 
Dec. 5, 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) 13.8 μg/m3 (55) 55.0
 
Dec. 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 41.0 μg/m3 (38) 9.3 μg/m3 (39) 39.0
 
Dec. 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 39.0 μg/m3 (37) 7.9 μg/m3 (33) 37.0
 
Dec. 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 76.0 μg/m3 (62) 10.7 μg/m3 (45) 62.0
 
Dec. 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 15.0
 
Dec. 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 9.0 μg/m3 (9) 4.3 μg/m3 (18) 18.0
 
Dec. 5, 2021, midnight N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 8.0 μg/m3 (8) 6.2 μg/m3 (26) 26.0
 
Dec. 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 6.0 μg/m3 (6) 10.5 μg/m3 (44) 44.0
 
Dec. 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 7.0 μg/m3 (7) 2.8 μg/m3 (12) 20.0
 
Dec. 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (15) 20.0
 
Dec. 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 11.0 μg/m3 (11) 8.2 μg/m3 (35) 35.0
 
Dec. 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 14.0 μg/m3 (13) 4.1 μg/m3 (18) 20.0
 
Dec. 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 9.0 μg/m3 (9) 6.7 μg/m3 (28) 28.0
 
Dec. 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 9.0 μg/m3 (9) 2.4 μg/m3 (10) 23.0
 
Dec. 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 5.0 μg/m3 (5) 0.4 μg/m3 (2) 24.0
 
Dec. 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A -4.0 μg/m3 (0) -0.4 μg/m3 (0) 25.0
 
Dec. 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (13) 26.0
 
Dec. 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (8) 26.0
 
Dec. 4, 2021, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.0 μg/m3 (4) -0.3 μg/m3 (0) 26.0
 
Dec. 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 28.0
 
Dec. 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 2.0 μg/m3 (2) 0.6 μg/m3 (3) 29.0
 
Dec. 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 2.0 μg/m3 (2) 3.3 μg/m3 (14) 29.0
 
Dec. 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) -4.0 μg/m3 (0) 26.0
 
Dec. 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) -2.2 μg/m3 (0) 26.0
 
Dec. 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 1.0 μg/m3 (1) 4.5 μg/m3 (19) 27.0
 
Dec. 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 6.0 μg/m3 (6) -2.4 μg/m3 (0) 29.0
 
Dec. 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 10.0 μg/m3 (10) -0.5 μg/m3 (0) 27.0
 
Dec. 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 12.0 μg/m3 (12) 1.1 μg/m3 (5) 25.0
 
Dec. 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 25.0 μg/m3 (24) 1.4 μg/m3 (6) 25.0
 
Dec. 4, 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) 3.3 μg/m3 (14) 37.0
 
Dec. 4, 2021, midnight N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 50.0 μg/m3 (47) 6.6 μg/m3 (28) 47.0
 
Dec. 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 34.0 μg/m3 (32) 9.7 μg/m3 (41) 41.0
 
Dec. 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 35.0 μg/m3 (33) 0.5 μg/m3 (3) 33.0
 
Dec. 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 37.0 μg/m3 (35) 6.2 μg/m3 (26) 35.0
 
Dec. 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 37.0 μg/m3 (35) 10.2 μg/m3 (43) 43.0
 
Dec. 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 40.0 μg/m3 (38) 6.5 μg/m3 (28) 38.0
 
Dec. 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 27.0 μg/m3 (25) 5.1 μg/m3 (22) 25.0
 
Dec. 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 30.0 μg/m3 (28) 8.0 μg/m3 (34) 34.0
 
Dec. 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 36.0 μg/m3 (34) 6.4 μg/m3 (27) 34.0
 
Dec. 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 30.0 μg/m3 (28) -3.7 μg/m3 (0) 28.0
 
Dec. 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 11.0 μg/m3 (11) 5.2 μg/m3 (22) 22.0
 
Dec. 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 8.0 μg/m3 (8) -0.4 μg/m3 (0) 19.0
 
Dec. 3, 2021, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 4.0 μg/m3 (4) -2.4 μg/m3 (0) 21.0
 
Dec. 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) -0.6 μg/m3 (0) 27.0
 
Dec. 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 7.0 μg/m3 (7) 3.0 μg/m3 (13) 26.0
 
Dec. 3, 2021, 9 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) 0.9 μg/m3 (4) 30.0
 
Dec. 3, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 30.0
 
Dec. 3, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.0 μg/m3 (0) 5.6 μg/m3 (24) 31.0
 
Dec. 3, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 3.0 μg/m3 (3) 1.1 μg/m3 (5) 32.0
 
Dec. 3, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.0 μg/m3 (0) 0.6 μg/m3 (3) 32.0
 
Dec. 3, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 26.0 μg/m3 (25) 6.1 μg/m3 (26) 36.0
 
Dec. 3, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 103.0 μg/m3 (75) 16.4 μg/m3 (61) 75.0
 
Dec. 3, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 45.0 μg/m3 (42) 4.2 μg/m3 (18) 42.0
 
Dec. 3, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 14.0 μg/m3 (13) 0.9 μg/m3 (4) 25.0
 
Dec. 3, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 24.0 μg/m3 (23) 6.5 μg/m3 (28) 28.0
 
Dec. 2, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 42.0 μg/m3 (39) 4.9 μg/m3 (21) 39.0
 
Dec. 2, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 41.0 μg/m3 (38) 8.2 μg/m3 (35) 38.0
 
Dec. 2, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 41.0 μg/m3 (38) 8.2 μg/m3 (35) 38.0
 
Dec. 2, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 50.0 μg/m3 (47) 2.6 μg/m3 (11) 47.0
 
Dec. 2, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 9.0 μg/m3 (9) 6.5 μg/m3 (28) 28.0
 
Dec. 2, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 9.0 μg/m3 (9) 3.8 μg/m3 (16) 25.0
 
Dec. 2, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 14.0 μg/m3 (13) 3.8 μg/m3 (16) 23.0
 
Dec. 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 10.0 μg/m3 (10) 7.4 μg/m3 (31) 31.0
 
Dec. 2, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 10.0 μg/m3 (10) 4.3 μg/m3 (18) 22.0
 
Dec. 2, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 7.0 μg/m3 (7) 2.2 μg/m3 (10) 22.0
 
Dec. 2, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 6.0 μg/m3 (6) 2.3 μg/m3 (10) 23.0
 
Dec. 2, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 5.0 μg/m3 (5) -1.0 μg/m3 (0) 23.0
 
Dec. 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (5) 25.0
 
Dec. 2, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 6.0 μg/m3 (6) 0.7 μg/m3 (3) 24.0
 
Dec. 2, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 26.0
 
Dec. 2, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) 1.5 μg/m3 (7) 27.0
 
Dec. 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) -2.5 μg/m3 (0) 27.0
 
Dec. 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 7.0 μg/m3 (7) -0.6 μg/m3 (0) 28.0