ID: 2421

AQSQID: 300750001

Site Name: Broadus

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

Updated: Jan. 25, 2021, 1:31 a.m.

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

Reporting: True, Located: True

Current AQI: 25.0

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
Jan. 25, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 25.0 μg/m3 (24) 4.2 μg/m3 (18) 25.0
 
Jan. 24, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 35.0 μg/m3 (33) 4.9 μg/m3 (21) 33.0
 
Jan. 24, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 2.8 μg/m3 (12) 30.0
 
Jan. 24, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 5.0 μg/m3 (5) 5.6 μg/m3 (24) 30.0
 
Jan. 24, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 6.0 μg/m3 (6) 7.0 μg/m3 (30) 30.0
 
Jan. 24, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 11.0 μg/m3 (11) 3.2 μg/m3 (14) 30.0
 
Jan. 24, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 11.0 μg/m3 (11) 3.2 μg/m3 (14) 29.0
 
Jan. 24, 2021, 5 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) 13.9 μg/m3 (55) 55.0
 
Jan. 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 9.0 μg/m3 (9) 8.4 μg/m3 (36) 36.0
 
Jan. 24, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 17.0 μg/m3 (16) 1.4 μg/m3 (6) 20.0
 
Jan. 24, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 7.0 μg/m3 (7) 8.3 μg/m3 (35) 35.0
 
Jan. 24, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 2.0 μg/m3 (2) 0.3 μg/m3 (2) 13.0
 
Jan. 24, 2021, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 1.0 μg/m3 (1) 5.1 μg/m3 (22) 22.0
 
Jan. 24, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 8.0 μg/m3 (8) 10.3 μg/m3 (43) 43.0
 
Jan. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 10.0 μg/m3 (10) 4.6 μg/m3 (20) 20.0
 
Jan. 24, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 1.0 μg/m3 (1) 7.4 μg/m3 (31) 31.0
 
Jan. 24, 2021, 8 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) 10.2 μg/m3 (43) 43.0
 
Jan. 24, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 2.0 μg/m3 (2) 6.5 μg/m3 (28) 28.0
 
Jan. 24, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 18.0 μg/m3 (17) 4.8 μg/m3 (20) 20.0
 
Jan. 24, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 36.0 μg/m3 (34) 8.5 μg/m3 (36) 36.0
 
Jan. 24, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 12.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
Jan. 24, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 12.0 μg/m3 (12) 5.2 μg/m3 (22) 24.0
 
Jan. 24, 2021, 2 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) 9.2 μg/m3 (39) 39.0
 
Jan. 24, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 27.0 μg/m3 (25) 7.9 μg/m3 (33) 33.0
 
Jan. 24, 2021, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 14.0 μg/m3 (13) 3.8 μg/m3 (16) 25.0
 
Jan. 23, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 20.0 μg/m3 (19) N/A 32.0
 
Jan. 23, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 12.0 μg/m3 (12) 1.3 μg/m3 (6) 34.0
 
Jan. 23, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 12.0 μg/m3 (12) 0.5 μg/m3 (3) 35.0
 
Jan. 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 16.0 μg/m3 (15) 1.9 μg/m3 (8) 34.0
 
Jan. 23, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 12.0 μg/m3 (12) 4.8 μg/m3 (20) 32.0
 
Jan. 23, 2021, 6 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) 4.5 μg/m3 (19) 30.0
 
Jan. 23, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 23.0 μg/m3 (22) 7.8 μg/m3 (33) 33.0
 
Jan. 23, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 30.0 μg/m3 (28) 12.0 μg/m3 (50) 50.0
 
Jan. 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 12.0 μg/m3 (12) 6.3 μg/m3 (27) 27.0
 
Jan. 23, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 7.0 μg/m3 (7) 3.4 μg/m3 (15) 15.0
 
Jan. 23, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 10.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2021, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 8.0 μg/m3 (8) 7.5 μg/m3 (32) 32.0
 
Jan. 23, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 6.0 μg/m3 (6) 9.6 μg/m3 (40) 40.0
 
Jan. 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 6.0 μg/m3 (6) 6.6 μg/m3 (28) 28.0
 
Jan. 23, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 6.0 μg/m3 (6) 8.4 μg/m3 (36) 36.0
 
Jan. 23, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 7.0 μg/m3 (7) 18.4 μg/m3 (65) 65.0
 
Jan. 23, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 3.0 μg/m3 (3) -2.3 μg/m3 (0) 19.0
 
Jan. 23, 2021, 6 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) 1.8 μg/m3 (8) 24.0
 
Jan. 23, 2021, 5 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) 3.1 μg/m3 (13) 27.0
 
Jan. 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 3.0 μg/m3 (3) 5.7 μg/m3 (24) 29.0
 
Jan. 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 4.0 μg/m3 (4) 4.6 μg/m3 (20) 29.0
 
Jan. 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (9) 30.0
 
Jan. 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 10.0 μg/m3 (10) -1.5 μg/m3 (0) 30.0
 
Jan. 23, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 6.0 μg/m3 (6) N/A 30.0
 
Jan. 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 34.0
 
Jan. 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 0.0 μg/m3 (0) -3.3 μg/m3 (0) 36.0
 
Jan. 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -2.0 μg/m3 (0) -3.4 μg/m3 (0) 34.0
 
Jan. 22, 2021, 8 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 (0) 32.0
 
Jan. 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.0 μg/m3 (2) N/A 31.0
 
Jan. 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 31.0 μg/m3 (29) 14.6 μg/m3 (57) 57.0
 
Jan. 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 26.0 μg/m3 (25) 11.7 μg/m3 (49) 49.0
 
Jan. 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 10.0 μg/m3 (10) 3.8 μg/m3 (16) 16.0
 
Jan. 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 11.0 μg/m3 (11) 8.3 μg/m3 (35) 35.0
 
Jan. 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 9.0 μg/m3 (9) 6.7 μg/m3 (28) 28.0
 
Jan. 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (6) 13.0
 
Jan. 22, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 0.0 μg/m3 (0) -0.9 μg/m3 (0) 17.0
 
Jan. 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 0.0 μg/m3 (0) 1.9 μg/m3 (8) 19.0
 
Jan. 22, 2021, 10 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) 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 12.0 μg/m3 (12) 5.6 μg/m3 (24) 24.0
 
Jan. 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 2.0 μg/m3 (2) 0.6 μg/m3 (3) 12.0
 
Jan. 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 1.0 μg/m3 (1) 9.9 μg/m3 (42) 42.0
 
Jan. 22, 2021, 6 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) -3.6 μg/m3 (0) 18.0
 
Jan. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) N/A 24.0
 
Jan. 22, 2021, 4 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) -3.3 μg/m3 (0) 27.0
 
Jan. 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 10.0 μg/m3 (10) 50.2 μg/m3 (138) 138.0
 
Jan. 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 21.0 μg/m3 (20) 4.9 μg/m3 (21) 27.0
 
Jan. 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 13.0 μg/m3 (13) 4.0 μg/m3 (17) 29.0
 
Jan. 22, 2021, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 11.0 μg/m3 (11) -0.9 μg/m3 (0) 28.0
 
Jan. 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 6.0 μg/m3 (6) -1.1 μg/m3 (0) 31.0
 
Jan. 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 8.0 μg/m3 (8) 2.2 μg/m3 (10) 35.0
 
Jan. 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 6.0 μg/m3 (6) 2.5 μg/m3 (11) 36.0
 
Jan. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 6.0 μg/m3 (6) 3.8 μg/m3 (16) 36.0
 
Jan. 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 9.0 μg/m3 (9) 0.5 μg/m3 (3) 35.0
 
Jan. 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 11.0 μg/m3 (11) 4.6 μg/m3 (20) 35.0
 
Jan. 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 17.0 μg/m3 (16) 8.1 μg/m3 (34) 34.0
 
Jan. 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 13.0 μg/m3 (13) -2.4 μg/m3 (0) 32.0
 
Jan. 21, 2021, 3 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) 1.5 μg/m3 (7) 28.0
 
Jan. 21, 2021, 2 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) 6.1 μg/m3 (26) 27.0
 
Jan. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 20.0 μg/m3 (19) 1.8 μg/m3 (8) 26.0
 
Jan. 21, 2021, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 3.0 μg/m3 (3) N/A 27.0
 
Jan. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.0 μg/m3 (2) N/A 31.0
 
Jan. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 2.0 μg/m3 (2) -1.2 μg/m3 (0) 33.0
 
Jan. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 9.0 μg/m3 (9) 5.1 μg/m3 (22) 28.0
 
Jan. 21, 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 (0) 11.6 μg/m3 (49) 49.0
 
Jan. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 2.0 μg/m3 (2) 10.9 μg/m3 (46) 46.0
 
Jan. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 5.0 μg/m3 (5) 5.7 μg/m3 (24) 25.0
 
Jan. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 6.0 μg/m3 (6) 4.2 μg/m3 (18) 20.0
 
Jan. 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 10.0 μg/m3 (10) 8.6 μg/m3 (36) 36.0
 
Jan. 21, 2021, 3 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) 6.7 μg/m3 (28) 28.0
 
Jan. 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 9.0 μg/m3 (9) 5.8 μg/m3 (25) 25.0
 
Jan. 21, 2021, 1 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) 1.6 μg/m3 (7) 19.0
 
Jan. 21, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) -1.2 μg/m3 (0) 35.0
 
Jan. 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 9.0 μg/m3 (9) N/A 34.0
 
Jan. 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 6.0 μg/m3 (6) 0.4 μg/m3 (2) 36.0
 
Jan. 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 36.0
 
Jan. 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 36.0
 
Jan. 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 4.0 μg/m3 (4) -2.1 μg/m3 (0) 36.0
 
Jan. 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 6.0 μg/m3 (6) 2.3 μg/m3 (10) 35.0
 
Jan. 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 20.0 μg/m3 (19) 5.6 μg/m3 (24) 34.0
 
Jan. 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 36.0 μg/m3 (34) 6.7 μg/m3 (28) 34.0
 
Jan. 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 33.0 μg/m3 (31) 2.0 μg/m3 (9) 33.0
 
Jan. 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 6.0 μg/m3 (6) -2.4 μg/m3 (0) 35.0
 
Jan. 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 3.0 μg/m3 (3) -1.1 μg/m3 (0) 33.0
 
Jan. 20, 2021, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 2.0 μg/m3 (2) -4.5 μg/m3 (0) 30.0
 
Jan. 20, 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) N/A 32.0
 
Jan. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 6.0 μg/m3 (6) N/A 30.0
 
Jan. 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 3.0 μg/m3 (3) 55.8 μg/m3 (152) 152.0
 
Jan. 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -2.0 μg/m3 (0) 16.8 μg/m3 (61) 61.0
 
Jan. 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) -1.4 μg/m3 (0) 29.0
 
Jan. 20, 2021, 6 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) 2.4 μg/m3 (10) 29.0
 
Jan. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 3.0 μg/m3 (3) -0.6 μg/m3 (0) 28.0
 
Jan. 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (2) 29.0
 
Jan. 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.0 μg/m3 (2) 1.8 μg/m3 (8) 31.0
 
Jan. 20, 2021, 2 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) -2.8 μg/m3 (0) 31.0
 
Jan. 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 0.0 μg/m3 (0) -2.2 μg/m3 (0) 33.0
 
Jan. 20, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.0 μg/m3 (0) N/A 32.0
 
Jan. 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 3.0 μg/m3 (3) N/A 33.0
 
Jan. 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) N/A 35.0
 
Jan. 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A -1.0 μg/m3 (0) -2.6 μg/m3 (0) 35.0
 
Jan. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 35.0
 
Jan. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) N/A 35.0
 
Jan. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 3.0 μg/m3 (3) N/A 34.0
 
Jan. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 4.0 μg/m3 (4) 30.6 μg/m3 (90) 90.0
 
Jan. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 6.0 μg/m3 (6) 28.0 μg/m3 (85) 85.0
 
Jan. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.0 μg/m3 (0) -3.4 μg/m3 (0) 30.0
 
Jan. 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 31.0
 
Jan. 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 2.0 μg/m3 (2) 0.9 μg/m3 (4) 32.0
 
Jan. 19, 2021, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 1.0 μg/m3 (1) 0.8 μg/m3 (4) 33.0
 
Jan. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) -0.1 μg/m3 (0) 35.0
 
Jan. 19, 2021, 10 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) 1.7 μg/m3 (8) 35.0
 
Jan. 19, 2021, 9 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) 2.1 μg/m3 (9) 34.0
 
Jan. 19, 2021, 8 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) 6.4 μg/m3 (27) 34.0
 
Jan. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 10.0 μg/m3 (10) 9.4 μg/m3 (40) 40.0
 
Jan. 19, 2021, 6 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) 4.4 μg/m3 (19) 32.0
 
Jan. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 8.0 μg/m3 (8) 5.5 μg/m3 (23) 30.0
 
Jan. 19, 2021, 4 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) 6.4 μg/m3 (27) 30.0
 
Jan. 19, 2021, 3 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) 2.0 μg/m3 (9) 30.0
 
Jan. 19, 2021, 2 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) 2.0 μg/m3 (9) 28.0
 
Jan. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 3.0 μg/m3 (3) -4.3 μg/m3 (0) 28.0
 
Jan. 19, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 5.0 μg/m3 (5) -3.1 μg/m3 (0) 31.0
 
Jan. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 3.0 μg/m3 (3) 3.6 μg/m3 (16) 34.0
 
Jan. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 4.0 μg/m3 (4) 6.8 μg/m3 (29) 34.0
 
Jan. 18, 2021, 9 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) 5.2 μg/m3 (22) 35.0
 
Jan. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 36.0
 
Jan. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 1.0 μg/m3 (1) 0.7 μg/m3 (3) 38.0
 
Jan. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 6.0 μg/m3 (6) 1.1 μg/m3 (5) 37.0
 
Jan. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 11.0 μg/m3 (11) 2.1 μg/m3 (9) 36.0
 
Jan. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 12.0 μg/m3 (12) 2.6 μg/m3 (11) 35.0
 
Jan. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 9.0 μg/m3 (9) 0.0 μg/m3 (0) 32.0
 
Jan. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 5.0 μg/m3 (5) 6.2 μg/m3 (26) 30.0
 
Jan. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 3.1 μg/m3 (13) 30.0
 
Jan. 18, 2021, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 30.0
 
Jan. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 1.0 μg/m3 (1) -2.2 μg/m3 (0) 30.0
 
Jan. 18, 2021, 10 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) 1.4 μg/m3 (6) 32.0
 
Jan. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 6.0 μg/m3 (6) -4.2 μg/m3 (0) 35.0
 
Jan. 18, 2021, 8 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) N/A 35.0
 
Jan. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A -4.0 μg/m3 (0) N/A 35.0
 
Jan. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 1.0 μg/m3 (1) -1.0 μg/m3 (0) 35.0
 
Jan. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 2.0 μg/m3 (2) 27.8 μg/m3 (85) 85.0
 
Jan. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 2.0 μg/m3 (2) -0.8 μg/m3 (0) 34.0
 
Jan. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 1.0 μg/m3 (1) 3.7 μg/m3 (16) 34.0
 
Jan. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 3.3 μg/m3 (14) 29.0
 
Jan. 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 1.0 μg/m3 (1) -0.6 μg/m3 (0) 30.0