AQSQID: 300750001

Site Name: Broadus

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
Jan. 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 39.0 μg/m3 (35) 7.3 μg/m3 (30) 35.0
 
Jan. 17, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 32.0 μg/m3 (29) 3.3 μg/m3 (14) 29.0
 
Jan. 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 23.0 μg/m3 (21) -0.1 μg/m3 (0) 21.0
 
Jan. 17, 2020, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 32.0 μg/m3 (29) 4.7 μg/m3 (20) 29.0
 
Jan. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 20.0 μg/m3 (18) 5.6 μg/m3 (23) 25.0
 
Jan. 17, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 13.0 μg/m3 (12) 2.8 μg/m3 (12) 18.0
 
Jan. 17, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 24.0 μg/m3 (22) 5.7 μg/m3 (24) 24.0
 
Jan. 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 8.0 μg/m3 (7) 4.2 μg/m3 (18) 18.0
 
Jan. 17, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 0.0 μg/m3 (0) -1.4 μg/m3 (0) 13.0
 
Jan. 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 12.0 μg/m3 (11) 2.2 μg/m3 (9) 18.0
 
Jan. 17, 2020, 5 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) 4.2 μg/m3 (18) 22.0
 
Jan. 17, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 14.0 μg/m3 (13) 4.4 μg/m3 (18) 18.0
 
Jan. 17, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 19.0 μg/m3 (17) 3.3 μg/m3 (14) 20.0
 
Jan. 17, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 35.0 μg/m3 (32) 6.5 μg/m3 (27) 32.0
 
Jan. 17, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 61.0 μg/m3 (53) 2.3 μg/m3 (10) 53.0
 
Jan. 17, 2020, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 73.0 μg/m3 (59) 0.1 μg/m3 (0) 59.0
 
Jan. 16, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 1.6 μg/m3 (7) 22.0
 
Jan. 16, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 1.1 μg/m3 (5) 23.0
 
Jan. 16, 2020, 9 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) 1.1 μg/m3 (5) 23.0
 
Jan. 16, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 8.0 μg/m3 (7) 0.1 μg/m3 (0) 23.0
 
Jan. 16, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (4) 23.0
 
Jan. 16, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (7) 23.0
 
Jan. 16, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 18.0 μg/m3 (16) 0.1 μg/m3 (0) 22.0
 
Jan. 16, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 30.0 μg/m3 (27) 3.0 μg/m3 (12) 27.0
 
Jan. 16, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 24.0 μg/m3 (22) 1.8 μg/m3 (8) 22.0
 
Jan. 16, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 18.0 μg/m3 (16) 1.7 μg/m3 (7) 21.0
 
Jan. 16, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 14.0 μg/m3 (13) 5.2 μg/m3 (22) 22.0
 
Jan. 16, 2020, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 3.4 μg/m3 (14) 20.0
 
Jan. 16, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 9.0 μg/m3 (8) 1.2 μg/m3 (5) 18.0
 
Jan. 16, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 11.0 μg/m3 (10) 2.8 μg/m3 (12) 17.0
 
Jan. 16, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 12.0 μg/m3 (11) 2.4 μg/m3 (10) 17.0
 
Jan. 16, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 11.0 μg/m3 (10) 0.0 μg/m3 (0) 18.0
 
Jan. 16, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A -4.0 μg/m3 (0) 0.5 μg/m3 (2) 19.0
 
Jan. 16, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A -3.0 μg/m3 (0) 3.1 μg/m3 (13) 21.0
 
Jan. 16, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 0.0 μg/m3 (0) 3.4 μg/m3 (14) 19.0
 
Jan. 16, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 18.0
 
Jan. 16, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) -0.7 μg/m3 (0) 18.0
 
Jan. 16, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 15.0 μg/m3 (14) 3.6 μg/m3 (15) 17.0
 
Jan. 16, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 13.0 μg/m3 (12) 5.2 μg/m3 (22) 22.0
 
Jan. 16, 2020, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 9.0 μg/m3 (8) -1.5 μg/m3 (0) 17.0
 
Jan. 15, 2020, 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 (0) -2.3 μg/m3 (0) 17.0
 
Jan. 15, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 2.8 μg/m3 (12) 18.0
 
Jan. 15, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 5.6 μg/m3 (23) 23.0
 
Jan. 15, 2020, 8 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) 3.3 μg/m3 (14) 18.0
 
Jan. 15, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 11.0 μg/m3 (10) 4.9 μg/m3 (20) 20.0
 
Jan. 15, 2020, 6 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) 1.5 μg/m3 (6) 20.0
 
Jan. 15, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 12.0 μg/m3 (11) 4.5 μg/m3 (19) 21.0
 
Jan. 15, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 21.0 μg/m3 (19) 6.1 μg/m3 (25) 25.0
 
Jan. 15, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 28.0 μg/m3 (25) 3.5 μg/m3 (15) 25.0
 
Jan. 15, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 9.0 μg/m3 (8) 1.1 μg/m3 (5) 22.0
 
Jan. 15, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 7.0 μg/m3 (6) 2.3 μg/m3 (10) 23.0
 
Jan. 15, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 22.0
 
Jan. 15, 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) 5.2 μg/m3 (22) 22.0
 
Jan. 15, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 4.7 μg/m3 (20) 21.0
 
Jan. 15, 2020, 9 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) 2.8 μg/m3 (12) 20.0
 
Jan. 15, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 2.0 μg/m3 (2) 1.5 μg/m3 (6) 18.0
 
Jan. 15, 2020, 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 (0) 3.8 μg/m3 (16) 18.0
 
Jan. 15, 2020, 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) 1.4 μg/m3 (6) 18.0
 
Jan. 15, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 11.0 μg/m3 (10) 4.5 μg/m3 (19) 21.0
 
Jan. 15, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 17.0 μg/m3 (15) 4.8 μg/m3 (20) 21.0
 
Jan. 15, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 17.0 μg/m3 (15) 3.4 μg/m3 (14) 22.0
 
Jan. 15, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 21.0 μg/m3 (19) 7.7 μg/m3 (32) 32.0
 
Jan. 15, 2020, 1 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) 4.9 μg/m3 (20) 26.0
 
Jan. 15, 2020, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 20.0 μg/m3 (18) 4.7 μg/m3 (20) 22.0
 
Jan. 14, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 18.0 μg/m3 (16) 4.2 μg/m3 (18) 22.0
 
Jan. 14, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 14.0 μg/m3 (13) -0.9 μg/m3 (0) 21.0
 
Jan. 14, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 17.0 μg/m3 (15) 2.4 μg/m3 (10) 19.0
 
Jan. 14, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 35.0 μg/m3 (32) 5.1 μg/m3 (21) 32.0
 
Jan. 14, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 34.0 μg/m3 (31) 0.6 μg/m3 (2) 31.0
 
Jan. 14, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 23.0 μg/m3 (21) 3.6 μg/m3 (15) 21.0
 
Jan. 14, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 21.0 μg/m3 (19) -0.6 μg/m3 (0) 19.0
 
Jan. 14, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 13.0 μg/m3 (12) 5.4 μg/m3 (23) 23.0
 
Jan. 14, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 3.5 μg/m3 (15) 18.0
 
Jan. 14, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 2.2 μg/m3 (9) 19.0
 
Jan. 14, 2020, 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) 3.5 μg/m3 (15) 18.0
 
Jan. 14, 2020, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 8.0 μg/m3 (7) 3.9 μg/m3 (16) 17.0
 
Jan. 14, 2020, 11 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) 3.8 μg/m3 (16) 16.0
 
Jan. 14, 2020, 10 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) 2.4 μg/m3 (10) 15.0
 
Jan. 14, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 15.0
 
Jan. 14, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A -1.0 μg/m3 (0) 6.1 μg/m3 (25) 25.0
 
Jan. 14, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 0.0 μg/m3 (0) 0.6 μg/m3 (2) 14.0
 
Jan. 14, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 14.0
 
Jan. 14, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A -1.0 μg/m3 (0) 2.5 μg/m3 (10) 14.0
 
Jan. 14, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 1.0 μg/m3 (1) 2.9 μg/m3 (12) 13.0
 
Jan. 14, 2020, 3 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) 4.9 μg/m3 (20) 20.0
 
Jan. 14, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 26.0 μg/m3 (24) 4.0 μg/m3 (17) 24.0
 
Jan. 14, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 35.0 μg/m3 (32) 7.9 μg/m3 (33) 33.0
 
Jan. 14, 2020, midnight N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 10.0 μg/m3 (9) 3.8 μg/m3 (16) 16.0
 
Jan. 13, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 10.0 μg/m3 (9) 4.2 μg/m3 (18) 18.0
 
Jan. 13, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 21.0 μg/m3 (19) 8.7 μg/m3 (36) 36.0
 
Jan. 13, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 27.0 μg/m3 (25) 10.7 μg/m3 (45) 45.0
 
Jan. 13, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 35.0 μg/m3 (32) 7.6 μg/m3 (32) 32.0
 
Jan. 13, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 30.0 μg/m3 (27) 4.4 μg/m3 (18) 27.0
 
Jan. 13, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 28.0 μg/m3 (25) 2.6 μg/m3 (11) 25.0
 
Jan. 13, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 35.0 μg/m3 (32) 2.9 μg/m3 (12) 32.0
 
Jan. 13, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 24.0 μg/m3 (22) 2.5 μg/m3 (10) 22.0
 
Jan. 13, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 19.0
 
Jan. 13, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 3.0 μg/m3 (3) -0.9 μg/m3 (0) 19.0
 
Jan. 13, 2020, 1 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) 2.2 μg/m3 (9) 18.0
 
Jan. 13, 2020, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (14) 16.0
 
Jan. 13, 2020, 11 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) 2.9 μg/m3 (12) 16.0
 
Jan. 13, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 12.0 μg/m3 (11) 4.6 μg/m3 (19) 19.0
 
Jan. 13, 2020, 9 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) 4.2 μg/m3 (18) 18.0
 
Jan. 13, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 10.0 μg/m3 (9) 5.6 μg/m3 (23) 23.0
 
Jan. 13, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 0.0 μg/m3 (0) 4.2 μg/m3 (18) 18.0
 
Jan. 13, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 7.0 μg/m3 (6) 3.3 μg/m3 (14) 14.0
 
Jan. 13, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 5.0 μg/m3 (5) 3.2 μg/m3 (13) 15.0
 
Jan. 13, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 8.0 μg/m3 (7) 4.9 μg/m3 (20) 20.0
 
Jan. 13, 2020, 3 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) 2.3 μg/m3 (10) 16.0
 
Jan. 13, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 10.0 μg/m3 (9) 1.3 μg/m3 (5) 16.0
 
Jan. 13, 2020, 1 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) 8.3 μg/m3 (35) 35.0
 
Jan. 13, 2020, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 51.0 μg/m3 (46) 16.6 μg/m3 (60) 60.0
 
Jan. 12, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 24.0 μg/m3 (22) 0.3 μg/m3 (1) 23.0
 
Jan. 12, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 8.0 μg/m3 (7) -0.5 μg/m3 (0) 25.0
 
Jan. 12, 2020, 9 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) 2.7 μg/m3 (11) 26.0
 
Jan. 12, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) -0.4 μg/m3 (0) 25.0
 
Jan. 12, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 25.0
 
Jan. 12, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 25.0
 
Jan. 12, 2020, 5 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) -0.8 μg/m3 (0) 24.0
 
Jan. 12, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 1.3 μg/m3 (5) 24.0
 
Jan. 12, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 0.0 μg/m3 (0) 1.7 μg/m3 (7) 24.0
 
Jan. 12, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) -0.8 μg/m3 (0) 23.0
 
Jan. 12, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 3.8 μg/m3 (16) 23.0
 
Jan. 12, 2020, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) -1.2 μg/m3 (0) 23.0
 
Jan. 12, 2020, 11 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) 2.1 μg/m3 (9) 23.0
 
Jan. 12, 2020, 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) 2.8 μg/m3 (12) 23.0
 
Jan. 12, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 24.0
 
Jan. 12, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 0.4 μg/m3 (2) 24.0
 
Jan. 12, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 0.0 μg/m3 (0) 3.9 μg/m3 (16) 19.0
 
Jan. 12, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 19.0
 
Jan. 12, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 2.0 μg/m3 (2) 0.9 μg/m3 (4) 21.0
 
Jan. 12, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 2.0 μg/m3 (2) 1.8 μg/m3 (8) 22.0
 
Jan. 12, 2020, 3 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) 0.2 μg/m3 (1) 24.0
 
Jan. 12, 2020, 2 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) 0.2 μg/m3 (1) 25.0
 
Jan. 12, 2020, 1 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) -0.2 μg/m3 (0) 25.0
 
Jan. 12, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) 0.1 μg/m3 (0) 28.0
 
Jan. 11, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 27.0
 
Jan. 11, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 0.1 μg/m3 (0) 27.0
 
Jan. 11, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 0.3 μg/m3 (1) 26.0
 
Jan. 11, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) -0.3 μg/m3 (0) 26.0
 
Jan. 11, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 11.0 μg/m3 (10) -2.8 μg/m3 (0) 27.0
 
Jan. 11, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 1.5 μg/m3 (6) 25.0
 
Jan. 11, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 18.0 μg/m3 (16) 2.6 μg/m3 (11) 25.0
 
Jan. 11, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 17.0 μg/m3 (15) 0.3 μg/m3 (1) 25.0
 
Jan. 11, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 17.0 μg/m3 (15) -0.7 μg/m3 (0) 25.0
 
Jan. 11, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 13.0 μg/m3 (12) 2.2 μg/m3 (9) 24.0
 
Jan. 11, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) 2.7 μg/m3 (11) 25.0
 
Jan. 11, 2020, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 1.0 μg/m3 (1) -1.5 μg/m3 (0) 24.0
 
Jan. 11, 2020, 11 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) 1.7 μg/m3 (7) 25.0
 
Jan. 11, 2020, 10 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) 0.9 μg/m3 (4) 25.0
 
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