AQSQID: 300750001

Site Name: Broadus

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

Reporting: True, Located: True

Current AQI: 36.0

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. 11, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 1.1 μg/m3 (5) 25.0
 
Jan. 11, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 7.0 μg/m3 (6) 2.5 μg/m3 (10) 23.0
 
Jan. 11, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 0.7 μg/m3 (3) 23.0
 
Jan. 11, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 1.0 μg/m3 (1) -1.4 μg/m3 (0) 23.0
 
Jan. 11, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 1.1 μg/m3 (5) 23.0
 
Jan. 11, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 23.0
 
Jan. 11, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 2.6 μg/m3 (11) 22.0
 
Jan. 11, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 20.0
 
Jan. 11, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 4.0 μg/m3 (4) 5.4 μg/m3 (23) 23.0
 
Jan. 11, 2020, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -3.0 μg/m3 (0) 7.8 μg/m3 (32) 32.0
 
Jan. 10, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 0.0 μg/m3 (0) 1.1 μg/m3 (5) 25.0
 
Jan. 10, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) -1.6 μg/m3 (0) 27.0
 
Jan. 10, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A -1.0 μg/m3 (0) 0.0 μg/m3 (0) 29.0
 
Jan. 10, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 11.0 μg/m3 (10) -0.9 μg/m3 (0) 29.0
 
Jan. 10, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 24.0 μg/m3 (22) 0.2 μg/m3 (1) 25.0
 
Jan. 10, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 16.0 μg/m3 (15) -0.2 μg/m3 (0) 22.0
 
Jan. 10, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 8.0 μg/m3 (7) 6.6 μg/m3 (28) 28.0
 
Jan. 10, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 17.0 μg/m3 (15) 7.0 μg/m3 (29) 29.0
 
Jan. 10, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) 7.6 μg/m3 (32) 32.0
 
Jan. 10, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 10.0 μg/m3 (9) 7.2 μg/m3 (30) 30.0
 
Jan. 10, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 8.0 μg/m3 (7) 7.4 μg/m3 (31) 31.0
 
Jan. 10, 2020, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 3.9 μg/m3 (16) 20.0
 
Jan. 10, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 12.0 μg/m3 (11) 4.6 μg/m3 (19) 21.0
 
Jan. 10, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 5.7 μg/m3 (24) 24.0
 
Jan. 10, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 15.0 μg/m3 (14) 4.1 μg/m3 (17) 24.0
 
Jan. 10, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 23.0 μg/m3 (21) 4.4 μg/m3 (18) 22.0
 
Jan. 10, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 23.0 μg/m3 (21) 3.9 μg/m3 (16) 21.0
 
Jan. 10, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 30.0 μg/m3 (27) 5.0 μg/m3 (21) 27.0
 
Jan. 10, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 29.0 μg/m3 (26) 5.0 μg/m3 (21) 26.0
 
Jan. 10, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 5.1 μg/m3 (21) 22.0
 
Jan. 10, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 17.0 μg/m3 (15) 2.4 μg/m3 (10) 22.0
 
Jan. 10, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 6.0 μg/m3 (5) 5.9 μg/m3 (25) 25.0
 
Jan. 10, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 22.0
 
Jan. 10, 2020, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 12.0 μg/m3 (11) -0.4 μg/m3 (0) 22.0
 
Jan. 9, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 3.0 μg/m3 (12) 23.0
 
Jan. 9, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 27.0 μg/m3 (25) 3.8 μg/m3 (16) 25.0
 
Jan. 9, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 29.0 μg/m3 (26) 3.3 μg/m3 (14) 26.0
 
Jan. 9, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 24.0 μg/m3 (22) 3.5 μg/m3 (15) 22.0
 
Jan. 9, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 15.0 μg/m3 (14) 0.7 μg/m3 (3) 21.0
 
Jan. 9, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 17.0 μg/m3 (15) 4.3 μg/m3 (18) 21.0
 
Jan. 9, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 22.0 μg/m3 (20) 5.5 μg/m3 (23) 23.0
 
Jan. 9, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 12.0 μg/m3 (11) 3.2 μg/m3 (13) 20.0
 
Jan. 9, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 12.0 μg/m3 (11) 3.4 μg/m3 (14) 20.0
 
Jan. 9, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 20.0
 
Jan. 9, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 2.0 μg/m3 (2) 1.1 μg/m3 (5) 20.0
 
Jan. 9, 2020, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (1) 20.0
 
Jan. 9, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 0.0 μg/m3 (0) 1.8 μg/m3 (8) 17.0
 
Jan. 9, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (8) 12.0
 
Jan. 9, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 13.0
 
Jan. 9, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 0.0 μg/m3 (0) 2.4 μg/m3 (10) 10.0
 
Jan. 9, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A -2.0 μg/m3 (0) 0.0 μg/m3 (0) 13.0
 
Jan. 9, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 15.0
 
Jan. 9, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 12.0
 
Jan. 9, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 10.0 μg/m3 (9) 2.1 μg/m3 (9) 14.0
 
Jan. 9, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 13.0 μg/m3 (12) 1.1 μg/m3 (5) 15.0
 
Jan. 9, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 2.5 μg/m3 (10) 16.0
 
Jan. 9, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 18.0 μg/m3 (16) -4.4 μg/m3 (0) 16.0
 
Jan. 9, 2020, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 13.0 μg/m3 (12) 0.2 μg/m3 (1) 12.0
 
Jan. 8, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 11.0 μg/m3 (10) -0.2 μg/m3 (0) 15.0
 
Jan. 8, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 13.0 μg/m3 (12) 1.0 μg/m3 (4) 15.0
 
Jan. 8, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 18.0 μg/m3 (16) 2.4 μg/m3 (10) 16.0
 
Jan. 8, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 17.0 μg/m3 (15) 0.6 μg/m3 (2) 15.0
 
Jan. 8, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 16.0 μg/m3 (15) -0.7 μg/m3 (0) 15.0
 
Jan. 8, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 0.0 μg/m3 (0) 1.3 μg/m3 (5) 13.0
 
Jan. 8, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) -2.6 μg/m3 (0) 18.0
 
Jan. 8, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 0.4 μg/m3 (2) 5.0
 
Jan. 8, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -4.0 μg/m3 (0) -1.7 μg/m3 (0) N/A
Jan. 8, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 0.3 μg/m3 (1) 1.0
 
Jan. 8, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) -0.7 μg/m3 (0) 18.0
 
Jan. 8, 2020, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) -0.2 μg/m3 (0) 18.0
 
Jan. 8, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) -1.1 μg/m3 (0) 18.0
 
Jan. 8, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 4.0 μg/m3 (4) -0.3 μg/m3 (0) 18.0
 
Jan. 8, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 18.0
 
Jan. 8, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 3.0 μg/m3 (3) -3.2 μg/m3 (0) 21.0
 
Jan. 8, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (1) 22.0
 
Jan. 8, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 1.0 μg/m3 (1) -4.4 μg/m3 (0) 24.0
 
Jan. 8, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) -0.6 μg/m3 (0) 25.0
 
Jan. 8, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A -3.0 μg/m3 (0) -1.1 μg/m3 (0) 25.0
 
Jan. 8, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A -3.0 μg/m3 (0) 0.2 μg/m3 (1) 25.0
 
Jan. 8, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 0.0 μg/m3 (0) -0.4 μg/m3 (0) 24.0
 
Jan. 8, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) -2.2 μg/m3 (0) 25.0
 
Jan. 8, 2020, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) -4.5 μg/m3 (0) 25.0
 
Jan. 7, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) -2.5 μg/m3 (0) 25.0
 
Jan. 7, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A -1.0 μg/m3 (0) 0.2 μg/m3 (1) 28.0
 
Jan. 7, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A -2.0 μg/m3 (0) -3.3 μg/m3 (0) 28.0
 
Jan. 7, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A -3.0 μg/m3 (0) -2.3 μg/m3 (0) 30.0
 
Jan. 7, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A -4.0 μg/m3 (0) -1.9 μg/m3 (0) 31.0
 
Jan. 7, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A -1.0 μg/m3 (0) -2.8 μg/m3 (0) 32.0
 
Jan. 7, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) -0.7 μg/m3 (0) 30.0
 
Jan. 7, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 1.0 μg/m3 (1) -2.9 μg/m3 (0) 29.0
 
Jan. 7, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A -2.0 μg/m3 (0) 0.6 μg/m3 (2) 28.0
 
Jan. 7, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A -5.0 μg/m3 (0) -3.8 μg/m3 (0) 30.0
 
Jan. 7, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -3.0 μg/m3 (0) -2.5 μg/m3 (0) 22.0
 
Jan. 7, 2020, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A -2.4 μg/m3 (0) 21.0
 
Jan. 7, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A -4.7 μg/m3 (0) 25.0
 
Jan. 7, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
Jan. 7, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
Jan. 7, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A N/A 25.0
 
Jan. 7, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A N/A 28.0
 
Jan. 7, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 2.1 μg/m3 (9) 27.0
 
Jan. 7, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A N/A 27.0
 
Jan. 7, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A N/A 27.0
 
Jan. 7, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
Jan. 7, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A N/A 25.0
 
Jan. 7, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
Jan. 7, 2020, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 27.0 μg/m3 (25) 0.4 μg/m3 (2) 28.0
 
Jan. 6, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 71.0 μg/m3 (58) 3.2 μg/m3 (13) 58.0
 
Jan. 6, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 52.0 μg/m3 (47) 9.6 μg/m3 (40) 47.0
 
Jan. 6, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 40.0 μg/m3 (36) 9.2 μg/m3 (38) 38.0
 
Jan. 6, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 45.0 μg/m3 (41) 10.2 μg/m3 (42) 42.0
 
Jan. 6, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 50.0 μg/m3 (45) 15.1 μg/m3 (57) 57.0
 
Jan. 6, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 48.0 μg/m3 (44) 11.5 μg/m3 (48) 48.0
 
Jan. 6, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 28.0 μg/m3 (25) 6.2 μg/m3 (26) 32.0
 
Jan. 6, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 40.0 μg/m3 (36) 6.9 μg/m3 (29) 36.0
 
Jan. 6, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 69.0 μg/m3 (57) 13.8 μg/m3 (54) 57.0
 
Jan. 6, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 38.0 μg/m3 (35) 9.5 μg/m3 (40) 40.0
 
Jan. 6, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 2.6 μg/m3 (11) 25.0
 
Jan. 6, 2020, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 4.9 μg/m3 (20) 23.0
 
Jan. 6, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 2.2 μg/m3 (9) 23.0
 
Jan. 6, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 0.2 μg/m3 (1) 22.0
 
Jan. 6, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 4.3 μg/m3 (18) 22.0
 
Jan. 6, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 2.8 μg/m3 (12) 24.0
 
Jan. 6, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) -2.2 μg/m3 (0) 25.0
 
Jan. 6, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) -2.0 μg/m3 (0) 27.0
 
Jan. 6, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 2.0 μg/m3 (2) N/A 27.0
 
Jan. 6, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 15.0 μg/m3 (14) 7.3 μg/m3 (30) 30.0
 
Jan. 6, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 20.0 μg/m3 (18) 0.1 μg/m3 (0) 25.0
 
Jan. 6, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 28.0 μg/m3 (25) 2.0 μg/m3 (8) 25.0
 
Jan. 6, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 26.0 μg/m3 (24) 3.6 μg/m3 (15) 25.0
 
Jan. 6, 2020, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 13.0 μg/m3 (12) -4.1 μg/m3 (0) 26.0
 
Jan. 5, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 12.0 μg/m3 (11) 10.1 μg/m3 (42) 42.0
 
Jan. 5, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 30.0 μg/m3 (27) -0.2 μg/m3 (0) 31.0
 
Jan. 5, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 22.0 μg/m3 (20) 7.5 μg/m3 (31) 32.0
 
Jan. 5, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 31.0
 
Jan. 5, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) -3.1 μg/m3 (0) 30.0
 
Jan. 5, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 3.0 μg/m3 (3) 6.1 μg/m3 (25) 30.0
 
Jan. 5, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
Jan. 5, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 18.0 μg/m3 (16) 10.6 μg/m3 (44) 44.0
 
Jan. 5, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 9.3 μg/m3 (39) 39.0
 
Jan. 5, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 0.0 μg/m3 (0) 1.5 μg/m3 (6) 26.0
 
Jan. 5, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 2.0 μg/m3 (2) -1.1 μg/m3 (0) 26.0
 
Jan. 5, 2020, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A -1.0 μg/m3 (0) -2.0 μg/m3 (0) 28.0
 
Jan. 5, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A -1.0 μg/m3 (0) 2.7 μg/m3 (11) 28.0
 
Jan. 5, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) 0.3 μg/m3 (1) 30.0
 
Jan. 5, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A -1.0 μg/m3 (0) 5.5 μg/m3 (23) 31.0
 
Jan. 5, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 32.0
 
Jan. 5, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 5.0 μg/m3 (5) 1.5 μg/m3 (6) 32.0
 
Jan. 5, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A -2.0 μg/m3 (0) 1.6 μg/m3 (7) 32.0
 
Jan. 5, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 28.0 μg/m3 (25) 4.0 μg/m3 (17) 32.0
 
Jan. 5, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 51.0 μg/m3 (46) 2.9 μg/m3 (12) 46.0
 
Jan. 5, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 19.0 μg/m3 (17) 8.6 μg/m3 (36) 36.0
 
Jan. 5, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 20.0 μg/m3 (18) 6.2 μg/m3 (26) 34.0
 
Jan. 5, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 11.0 μg/m3 (10) 4.4 μg/m3 (18) 30.0
 
Jan. 5, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 22.0 μg/m3 (20) -1.7 μg/m3 (0) 28.0
 
Jan. 4, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 20.0 μg/m3 (18) -1.5 μg/m3 (0) 30.0
 
Jan. 4, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) -1.4 μg/m3 (0) 27.0
 
Jan. 4, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) 7.6 μg/m3 (32) 32.0
 
Jan. 4, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 1.5 μg/m3 (6) 28.0
 
Jan. 4, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) 0.6 μg/m3 (2) 25.0
 
Jan. 4, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 6.8 μg/m3 (28) 28.0
 
Jan. 4, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 23.0
 
Jan. 4, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 1.1 μg/m3 (5) 22.0
 
Jan. 4, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A -4.0 μg/m3 (0) 3.8 μg/m3 (16) 21.0
 
Jan. 4, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 4.7 μg/m3 (20) 22.0
 
Jan. 4, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 22.0
 
Jan. 4, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 22.0
 
Jan. 4, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) -2.6 μg/m3 (0) 22.0
 
Jan. 4, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 5.0 μg/m3 (5) 2.8 μg/m3 (12) 22.0