AQSQID: 300750001

Site Name: Broadus

Location: Powder River Co, MT

Reporting: True, Located: True

Current AQI: 32.0

Powder River Co MT, US: 45.440295, -105.37028

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 23.0 μg/m3 (21) 7.7 μg/m3 (32) 32.0
 
Jan. 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 16.0 μg/m3 (15) 5.7 μg/m3 (24) 24.0
 
Jan. 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 21.0 μg/m3 (19) 11.4 μg/m3 (48) 48.0
 
Jan. 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 10.1 μg/m3 (42) 42.0
 
Jan. 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 13.0 μg/m3 (12) 4.0 μg/m3 (17) 18.0
 
Jan. 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 11.0 μg/m3 (10) 6.8 μg/m3 (28) 28.0
 
Jan. 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 2.0 μg/m3 (2) 5.8 μg/m3 (24) 24.0
 
Jan. 21, 2019, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 1.0 μg/m3 (1) 4.8 μg/m3 (20) 20.0
 
Jan. 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 6.0 μg/m3 (5) -4.2 μg/m3 (0) 19.0
 
Jan. 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 2.0 μg/m3 (2) -0.1 μg/m3 (0) 20.0
 
Jan. 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 21.0
 
Jan. 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) 5.5 μg/m3 (23) 23.0
 
Jan. 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 0.0 μg/m3 (0) 8.4 μg/m3 (35) 35.0
 
Jan. 21, 2019, 6 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) -1.0 μg/m3 (0) 22.0
 
Jan. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) -3.8 μg/m3 (0) 22.0
 
Jan. 21, 2019, 4 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) 1.5 μg/m3 (6) 22.0
 
Jan. 21, 2019, 3 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) -0.2 μg/m3 (0) 22.0
 
Jan. 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 9.0 μg/m3 (8) 0.8 μg/m3 (3) 22.0
 
Jan. 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 22.0
 
Jan. 21, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 13.0 μg/m3 (12) 4.3 μg/m3 (18) 23.0
 
Jan. 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 14.0 μg/m3 (13) 8.1 μg/m3 (34) 34.0
 
Jan. 20, 2019, 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) 2.4 μg/m3 (10) 27.0
 
Jan. 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A -1.0 μg/m3 (0) -3.3 μg/m3 (0) 25.0
 
Jan. 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 0.0 μg/m3 (0) -1.8 μg/m3 (0) 28.0
 
Jan. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A -1.4 μg/m3 (0) 28.0
 
Jan. 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 5.0 μg/m3 (5) 5.7 μg/m3 (24) 28.0
 
Jan. 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 12.0 μg/m3 (11) 10.3 μg/m3 (43) 43.0
 
Jan. 20, 2019, 4 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) 7.7 μg/m3 (32) 32.0
 
Jan. 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 7.9 μg/m3 (33) 33.0
 
Jan. 20, 2019, 2 p.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. 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 3.0 μg/m3 (3) -2.0 μg/m3 (0) 20.0
 
Jan. 20, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 22.0
 
Jan. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A -1.0 μg/m3 (0) -0.4 μg/m3 (0) 23.0
 
Jan. 20, 2019, 10 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) 1.3 μg/m3 (5) 23.0
 
Jan. 20, 2019, 9 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) 0.5 μg/m3 (2) 25.0
 
Jan. 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 3.0 μg/m3 (3) 8.4 μg/m3 (35) 35.0
 
Jan. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) -1.8 μg/m3 (0) 29.0
 
Jan. 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A -1.0 μg/m3 (0) 1.8 μg/m3 (8) 29.0
 
Jan. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) 4.2 μg/m3 (18) 28.0
 
Jan. 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) 4.4 μg/m3 (18) 25.0
 
Jan. 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 9.0 μg/m3 (8) -0.6 μg/m3 (0) 23.0
 
Jan. 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 14.0 μg/m3 (13) 0.0 μg/m3 (0) 22.0
 
Jan. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) 5.1 μg/m3 (21) 21.0
 
Jan. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 20.0
 
Jan. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
Jan. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) -0.7 μg/m3 (0) 18.0
 
Jan. 19, 2019, 9 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) 3.3 μg/m3 (14) 18.0
 
Jan. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 5.1 μg/m3 (21) 21.0
 
Jan. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 7.1 μg/m3 (30) 30.0
 
Jan. 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 7.0 μg/m3 (6) 6.8 μg/m3 (28) 28.0
 
Jan. 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 9.0 μg/m3 (8) 1.5 μg/m3 (6) 15.0
 
Jan. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 3.0 μg/m3 (3) 6.5 μg/m3 (27) 27.0
 
Jan. 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 10.0 μg/m3 (9) 3.4 μg/m3 (14) 14.0
 
Jan. 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 7.0 μg/m3 (6) 6.8 μg/m3 (28) 28.0
 
Jan. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 8.0 μg/m3 (7) 9.1 μg/m3 (38) 38.0
 
Jan. 19, 2019, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 8.0 μg/m3 (7) 5.7 μg/m3 (24) 24.0
 
Jan. 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 5.0 μg/m3 (5) 3.1 μg/m3 (13) 13.0
 
Jan. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 12.0 μg/m3 (11) 0.6 μg/m3 (2) 13.0
 
Jan. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 15.6 μg/m3 (58) 58.0
 
Jan. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A -3.0 μg/m3 (0) 8.6 μg/m3 (36) 36.0
 
Jan. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 1.0 μg/m3 (1) 15.1 μg/m3 (57) 57.0
 
Jan. 19, 2019, 6 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) 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 7.0 μg/m3 (6) 10.3 μg/m3 (43) 43.0
 
Jan. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 13.0 μg/m3 (12) 8.9 μg/m3 (37) 37.0
 
Jan. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 12.0 μg/m3 (11) 3.8 μg/m3 (16) 18.0
 
Jan. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 19.0 μg/m3 (17) 6.6 μg/m3 (28) 28.0
 
Jan. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 1.0 μg/m3 (1) N/A 17.0
 
Jan. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 3.0 μg/m3 (3) -2.0 μg/m3 (0) 17.0
 
Jan. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 11.0 μg/m3 (10) 4.9 μg/m3 (20) 20.0
 
Jan. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 15.0 μg/m3 (14) 3.9 μg/m3 (16) 16.0
 
Jan. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) 8.3 μg/m3 (35) 35.0
 
Jan. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) 25.3 μg/m3 (78) 78.0
 
Jan. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) 25.3 μg/m3 (78) 78.0
 
Jan. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) 25.3 μg/m3 (78) 78.0
 
Jan. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) 25.3 μg/m3 (78) 78.0
 
Jan. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 1.0 μg/m3 (1) 20.0 μg/m3 (67) 67.0
 
Jan. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 3.0 μg/m3 (3) 4.9 μg/m3 (20) 20.0
 
Jan. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 7.0 μg/m3 (6) 4.5 μg/m3 (19) 19.0
 
Jan. 18, 2019, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 4.0 μg/m3 (4) 3.2 μg/m3 (13) 15.0
 
Jan. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 1.0 μg/m3 (1) 4.9 μg/m3 (20) 20.0
 
Jan. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 5.0 μg/m3 (5) 3.2 μg/m3 (13) 16.0
 
Jan. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 7.0 μg/m3 (6) 3.9 μg/m3 (16) 16.0
 
Jan. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) N/A 16.0
 
Jan. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) N/A 16.0
 
Jan. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 16.0
 
Jan. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (8) 17.0
 
Jan. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 1.0 μg/m3 (1) 6.4 μg/m3 (27) 27.0
 
Jan. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) 1.5 μg/m3 (6) 16.0
 
Jan. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 16.0
 
Jan. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 25.0 μg/m3 (23) 1.8 μg/m3 (8) 23.0
 
Jan. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 41.0 μg/m3 (37) 4.5 μg/m3 (19) 37.0
 
Jan. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 19.0 μg/m3 (17) 0.0 μg/m3 (0) 17.0
 
Jan. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 28.0 μg/m3 (25) 9.2 μg/m3 (38) 38.0
 
Jan. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 19.0 μg/m3 (17) 1.3 μg/m3 (5) 17.0
 
Jan. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 27.0 μg/m3 (25) 9.2 μg/m3 (38) 38.0
 
Jan. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 30.0 μg/m3 (27) 8.3 μg/m3 (35) 35.0
 
Jan. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 35.0 μg/m3 (32) 10.2 μg/m3 (42) 42.0
 
Jan. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 15.0 μg/m3 (14) 10.5 μg/m3 (44) 44.0
 
Jan. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 14.0 μg/m3 (13) 6.5 μg/m3 (27) 27.0
 
Jan. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 37.0 μg/m3 (34) 6.8 μg/m3 (28) 34.0
 
Jan. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 27.0 μg/m3 (25) 12.2 μg/m3 (50) 50.0
 
Jan. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 20.0 μg/m3 (18) 10.5 μg/m3 (44) 44.0
 
Jan. 17, 2019, noon N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 7.0 μg/m3 (6) 8.2 μg/m3 (34) 34.0
 
Jan. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 8.0 μg/m3 (7) 11.0 μg/m3 (46) 46.0
 
Jan. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 20.0 μg/m3 (18) 5.6 μg/m3 (23) 23.0
 
Jan. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 15.0 μg/m3 (14) 3.2 μg/m3 (13) 14.0
 
Jan. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 8.0 μg/m3 (7) 0.0 μg/m3 (0) 9.0
 
Jan. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 9.0 μg/m3 (8) -1.1 μg/m3 (0) 10.0
 
Jan. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 22.0 μg/m3 (20) 8.1 μg/m3 (34) 34.0
 
Jan. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 22.0 μg/m3 (20) 4.7 μg/m3 (20) 20.0
 
Jan. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 21.0 μg/m3 (19) 5.8 μg/m3 (24) 24.0
 
Jan. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 32.0 μg/m3 (29) -0.3 μg/m3 (0) 29.0
 
Jan. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 40.0 μg/m3 (36) 3.6 μg/m3 (15) 36.0
 
Jan. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 40.0 μg/m3 (36) 5.3 μg/m3 (22) 36.0
 
Jan. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 21.0 μg/m3 (19) -3.5 μg/m3 (0) 19.0
 
Jan. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 103.0 μg/m3 (74) 4.1 μg/m3 (17) 74.0
 
Jan. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 116.0 μg/m3 (80) 14.8 μg/m3 (56) 80.0
 
Jan. 16, 2019, 9 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) 1.6 μg/m3 (7) 21.0
 
Jan. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 15.0 μg/m3 (14) 10.2 μg/m3 (42) 42.0
 
Jan. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 15.0 μg/m3 (14) 8.4 μg/m3 (35) 35.0
 
Jan. 16, 2019, 6 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) 10.4 μg/m3 (43) 43.0
 
Jan. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) 8.8 μg/m3 (37) 37.0
 
Jan. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 19.0 μg/m3 (17) 22.8 μg/m3 (73) 73.0
 
Jan. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 19.0 μg/m3 (17) 35.4 μg/m3 (100) 100.0
 
Jan. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 7.1 μg/m3 (30) 30.0
 
Jan. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 2.8 μg/m3 (12) 18.0
 
Jan. 16, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 8.0 μg/m3 (7) 11.1 μg/m3 (46) 46.0
 
Jan. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 3.7 μg/m3 (15) 18.0
 
Jan. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 10.0 μg/m3 (9) 5.1 μg/m3 (21) 21.0
 
Jan. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 6.0 μg/m3 (5) 9.4 μg/m3 (39) 39.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 4.0 μg/m3 (4) 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 1.9 μg/m3 (8) 18.0
 
Jan. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 6.5 μg/m3 (27) 27.0
 
Jan. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
Jan. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 20.0 μg/m3 (18) 3.5 μg/m3 (15) 18.0
 
Jan. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 23.0 μg/m3 (21) 4.2 μg/m3 (18) 21.0
 
Jan. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 26.0 μg/m3 (24) 4.4 μg/m3 (18) 24.0
 
Jan. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 45.0 μg/m3 (41) 1.6 μg/m3 (7) 41.0
 
Jan. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 43.0 μg/m3 (39) 1.4 μg/m3 (6) 39.0
 
Jan. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 47.0 μg/m3 (43) 2.6 μg/m3 (11) 43.0
 
Jan. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 36.0 μg/m3 (33) 2.9 μg/m3 (12) 33.0
 
Jan. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 23.0 μg/m3 (21) 4.2 μg/m3 (18) 26.0
 
Jan. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 35.0 μg/m3 (32) 5.4 μg/m3 (23) 32.0
 
Jan. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 37.0 μg/m3 (34) 7.9 μg/m3 (33) 34.0
 
Jan. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 49.0 μg/m3 (45) 11.7 μg/m3 (49) 49.0
 
Jan. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 48.0 μg/m3 (44) 17.7 μg/m3 (62) 62.0
 
Jan. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 58.0 μg/m3 (52) 15.6 μg/m3 (58) 58.0
 
Jan. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 33.0 μg/m3 (30) 2.9 μg/m3 (12) 30.0
 
Jan. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 12.0 μg/m3 (11) 6.2 μg/m3 (26) 26.0
 
Jan. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 21.0 μg/m3 (19) 7.8 μg/m3 (32) 32.0
 
Jan. 15, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 43.0 μg/m3 (39) 3.5 μg/m3 (15) 39.0
 
Jan. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 1.0 μg/m3 (1) -2.9 μg/m3 (0) 20.0
 
Jan. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 6.8 μg/m3 (28) 28.0
 
Jan. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 1.7 μg/m3 (7) 24.0
 
Jan. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 6.5 μg/m3 (27) 27.0
 
Jan. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 13.8 μg/m3 (54) 54.0
 
Jan. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 11.0 μg/m3 (10) 1.3 μg/m3 (5) 18.0
 
Jan. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) -2.9 μg/m3 (0) 15.0
 
Jan. 15, 2019, 4 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) 2.8 μg/m3 (12) 22.0
 
Jan. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 11.0 μg/m3 (10) 1.7 μg/m3 (7) 23.0
 
Jan. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 6.0 μg/m3 (5) -0.9 μg/m3 (0) 20.0
 
Jan. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 12.0 μg/m3 (11) -4.3 μg/m3 (0) 20.0
 
Jan. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 8.0 μg/m3 (7) N/A 23.0
 
Jan. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) N/A 22.0
 
Jan. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 0.0 μg/m3 (0) 1.0 μg/m3 (4) 23.0
 
Jan. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 4.1 μg/m3 (17) 24.0
 
Jan. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 7.6 μg/m3 (32) 32.0