AQSQID: 300750001

Site Name: Broadus

Location: Powder River Co, MT

Reporting: True, Located: True

Current AQI: 23.0

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
Sept. 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A -1.0 μg/m3 (0) 3.8 μg/m3 (16) 23.0
 
Sept. 21, 2019, 3 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) 5.0 μg/m3 (21) 22.0
 
Sept. 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 3.0 μg/m3 (3) 0.9 μg/m3 (4) 21.0
 
Sept. 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 0.0 μg/m3 (0) 0.8 μg/m3 (3) 21.0
 
Sept. 21, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 0.0 μg/m3 (0) 1.0 μg/m3 (4) 21.0
 
Sept. 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 1.0 μg/m3 (1) 2.3 μg/m3 (10) 22.0
 
Sept. 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 6.7 μg/m3 (28) 28.0
 
Sept. 21, 2019, 9 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) -0.7 μg/m3 (0) 14.0
 
Sept. 21, 2019, 8 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) 0.4 μg/m3 (2) 15.0
 
Sept. 21, 2019, 7 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) -0.7 μg/m3 (0) 16.0
 
Sept. 21, 2019, 6 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) -2.6 μg/m3 (0) 17.0
 
Sept. 21, 2019, 5 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) -1.2 μg/m3 (0) 16.0
 
Sept. 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 17.0
 
Sept. 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 27.0
 
Sept. 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 21.0 μg/m3 (19) -4.2 μg/m3 (0) 22.0
 
Sept. 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 31.0 μg/m3 (28) 0.0 μg/m3 (0) 28.0
 
Sept. 21, 2019, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 37.0 μg/m3 (34) 1.6 μg/m3 (7) 34.0
 
Sept. 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 26.0 μg/m3 (24) 8.3 μg/m3 (35) 35.0
 
Sept. 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 38.0 μg/m3 (35) 4.2 μg/m3 (18) 35.0
 
Sept. 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 46.0 μg/m3 (42) 13.6 μg/m3 (53) 53.0
 
Sept. 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 42.0 μg/m3 (38) 11.9 μg/m3 (50) 50.0
 
Sept. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 31.0 μg/m3 (28) 12.9 μg/m3 (52) 52.0
 
Sept. 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 24.0 μg/m3 (22) 12.7 μg/m3 (51) 51.0
 
Sept. 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 29.0 μg/m3 (26) 7.4 μg/m3 (31) 31.0
 
Sept. 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 30.0 μg/m3 (27) 13.3 μg/m3 (53) 53.0
 
Sept. 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 20.0 μg/m3 (18) 13.8 μg/m3 (54) 54.0
 
Sept. 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 23.0 μg/m3 (21) 3.8 μg/m3 (16) 21.0
 
Sept. 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 19.0 μg/m3 (17) 4.7 μg/m3 (20) 20.0
 
Sept. 20, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) 3.8 μg/m3 (16) 21.0
 
Sept. 20, 2019, 11 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) 4.6 μg/m3 (19) 21.0
 
Sept. 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 19.0
 
Sept. 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) -0.8 μg/m3 (0) 20.0
 
Sept. 20, 2019, 8 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) -0.2 μg/m3 (0) 22.0
 
Sept. 20, 2019, 7 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) N/A 22.0
 
Sept. 20, 2019, 6 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) -1.6 μg/m3 (0) 22.0
 
Sept. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 9.0 μg/m3 (8) 1.3 μg/m3 (5) 25.0
 
Sept. 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 4.1 μg/m3 (17) 25.0
 
Sept. 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 35.0 μg/m3 (32) 1.6 μg/m3 (7) 32.0
 
Sept. 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 37.0 μg/m3 (34) -4.8 μg/m3 (0) 34.0
 
Sept. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 41.0 μg/m3 (37) -3.9 μg/m3 (0) 37.0
 
Sept. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 54.0 μg/m3 (49) 14.2 μg/m3 (55) 55.0
 
Sept. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 38.0 μg/m3 (35) 22.7 μg/m3 (73) 73.0
 
Sept. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 20.0 μg/m3 (18) 10.9 μg/m3 (45) 45.0
 
Sept. 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 13.0 μg/m3 (12) 7.7 μg/m3 (32) 37.0
 
Sept. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 18.0 μg/m3 (16) 3.3 μg/m3 (14) 40.0
 
Sept. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 19.0 μg/m3 (17) -1.7 μg/m3 (0) 38.0
 
Sept. 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 13.0 μg/m3 (12) 8.9 μg/m3 (37) 37.0
 
Sept. 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 11.0 μg/m3 (10) 4.8 μg/m3 (20) 33.0
 
Sept. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 30.0 μg/m3 (27) 17.3 μg/m3 (61) 61.0
 
Sept. 19, 2019, 3 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) 35.7 μg/m3 (100) 100.0
 
Sept. 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 38.0 μg/m3 (35) 19.4 μg/m3 (66) 66.0
 
Sept. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 14.0 μg/m3 (13) 2.7 μg/m3 (11) 13.0
 
Sept. 19, 2019, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 14.0 μg/m3 (13) -3.6 μg/m3 (0) 13.0
 
Sept. 19, 2019, 11 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) -0.3 μg/m3 (0) 14.0
 
Sept. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 10.0 μg/m3 (9) 2.5 μg/m3 (10) 17.0
 
Sept. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) -0.4 μg/m3 (0) 18.0
 
Sept. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 3.7 μg/m3 (15) 22.0
 
Sept. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 15.5 μg/m3 (57) 57.0
 
Sept. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) 1.2 μg/m3 (5) 21.0
 
Sept. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) -1.2 μg/m3 (0) 21.0
 
Sept. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 0.8 μg/m3 (3) 20.0
 
Sept. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 12.0 μg/m3 (11) -3.5 μg/m3 (0) 22.0
 
Sept. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 13.0 μg/m3 (12) 3.7 μg/m3 (15) 23.0
 
Sept. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 18.0 μg/m3 (16) 10.5 μg/m3 (44) 44.0
 
Sept. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 12.0 μg/m3 (11) 5.1 μg/m3 (21) 31.0
 
Sept. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) -3.1 μg/m3 (0) 34.0
 
Sept. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 5.0 μg/m3 (5) 1.4 μg/m3 (6) 35.0
 
Sept. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 2.0 μg/m3 (2) 1.5 μg/m3 (6) 35.0
 
Sept. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 3.0 μg/m3 (3) -0.3 μg/m3 (0) 35.0
 
Sept. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) -0.7 μg/m3 (0) 32.0
 
Sept. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 30.0
 
Sept. 18, 2019, 5 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) -1.5 μg/m3 (0) 28.0
 
Sept. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 20.0 μg/m3 (18) 14.7 μg/m3 (56) 56.0
 
Sept. 18, 2019, 3 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) 12.1 μg/m3 (50) 50.0
 
Sept. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 6.9 μg/m3 (29) 29.0
 
Sept. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 1.8 μg/m3 (8) 21.0
 
Sept. 18, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 4.0 μg/m3 (4) 0.6 μg/m3 (2) 21.0
 
Sept. 18, 2019, 11 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) -3.3 μg/m3 (0) 22.0
 
Sept. 18, 2019, 10 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) -1.6 μg/m3 (0) 22.0
 
Sept. 18, 2019, 9 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) 0.1 μg/m3 (0) 22.0
 
Sept. 18, 2019, 8 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) -1.4 μg/m3 (0) 23.0
 
Sept. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 13.0 μg/m3 (12) 3.3 μg/m3 (14) 24.0
 
Sept. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 1.7 μg/m3 (7) 27.0
 
Sept. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 28.0
 
Sept. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 5.0 μg/m3 (5) 14.8 μg/m3 (56) 56.0
 
Sept. 18, 2019, 3 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) 10.1 μg/m3 (42) 42.0
 
Sept. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 21.0 μg/m3 (19) 1.6 μg/m3 (7) 42.0
 
Sept. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 92.0 μg/m3 (68) -3.0 μg/m3 (0) 68.0
 
Sept. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 72.0 μg/m3 (58) 6.1 μg/m3 (25) 58.0
 
Sept. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 123.0 μg/m3 (84) 17.1 μg/m3 (61) 84.0
 
Sept. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 110.0 μg/m3 (78) 15.2 μg/m3 (57) 78.0
 
Sept. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 55.0 μg/m3 (50) 8.1 μg/m3 (34) 50.0
 
Sept. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 61.0 μg/m3 (53) 10.3 μg/m3 (43) 53.0
 
Sept. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 88.0 μg/m3 (66) 19.6 μg/m3 (66) 66.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 89.0 μg/m3 (67) 11.3 μg/m3 (47) 67.0
 
Sept. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 44.0 μg/m3 (40) 2.1 μg/m3 (9) 40.0
 
Sept. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 167.0 μg/m3 (106) 39.0 μg/m3 (109) 109.0
 
Sept. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 252.0 μg/m3 (148) 47.4 μg/m3 (130) 148.0
 
Sept. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 228.0 μg/m3 (136) 29.0 μg/m3 (86) 136.0
 
Sept. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 68.0 μg/m3 (56) 10.1 μg/m3 (42) 56.0
 
Sept. 17, 2019, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 27.0 μg/m3 (25) 5.1 μg/m3 (21) 25.0
 
Sept. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 15.0 μg/m3 (14) 2.6 μg/m3 (11) 14.0
 
Sept. 17, 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) 5.3 μg/m3 (22) 22.0
 
Sept. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (12) 15.0
 
Sept. 17, 2019, 8 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) -1.4 μg/m3 (0) 18.0
 
Sept. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 22.0 μg/m3 (20) 7.2 μg/m3 (30) 30.0
 
Sept. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 38.0 μg/m3 (35) 10.4 μg/m3 (43) 43.0
 
Sept. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 41.0 μg/m3 (37) 12.9 μg/m3 (52) 52.0
 
Sept. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 53.0 μg/m3 (48) 9.7 μg/m3 (40) 48.0
 
Sept. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 70.0 μg/m3 (58) 14.1 μg/m3 (54) 58.0
 
Sept. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 21.0 μg/m3 (19) 6.3 μg/m3 (26) 31.0
 
Sept. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 10.0 μg/m3 (9) 4.2 μg/m3 (18) 31.0
 
Sept. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 72.0 μg/m3 (58) 21.3 μg/m3 (70) 70.0
 
Sept. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 18.9 μg/m3 (65) 65.0
 
Sept. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 9.0 μg/m3 (8) 1.1 μg/m3 (5) 40.0
 
Sept. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 18.0 μg/m3 (16) -3.8 μg/m3 (0) 39.0
 
Sept. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 35.0 μg/m3 (32) -4.8 μg/m3 (0) 39.0
 
Sept. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 28.0 μg/m3 (25) 9.2 μg/m3 (38) 38.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 32.0 μg/m3 (29) 13.2 μg/m3 (53) 53.0
 
Sept. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 19.0 μg/m3 (17) 17.0 μg/m3 (61) 61.0
 
Sept. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 41.0 μg/m3 (37) 11.5 μg/m3 (48) 48.0
 
Sept. 16, 2019, 3 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) 9.1 μg/m3 (38) 38.0
 
Sept. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 54.0 μg/m3 (49) 17.7 μg/m3 (62) 62.0
 
Sept. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 16.0 μg/m3 (15) 7.1 μg/m3 (30) 30.0
 
Sept. 16, 2019, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 16.0 μg/m3 (15) 9.4 μg/m3 (39) 39.0
 
Sept. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A -1.0 μg/m3 (0) N/A 12.0
 
Sept. 16, 2019, 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) 0.5 μg/m3 (2) 15.0
 
Sept. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 11.0 μg/m3 (10) 2.1 μg/m3 (9) 10.0
 
Sept. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 20.0 μg/m3 (18) 7.4 μg/m3 (31) 31.0
 
Sept. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 21.0 μg/m3 (19) 10.5 μg/m3 (44) 44.0
 
Sept. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 23.0 μg/m3 (21) 2.6 μg/m3 (11) 21.0
 
Sept. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 20.0 μg/m3 (18) 4.0 μg/m3 (17) 18.0
 
Sept. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 42.0 μg/m3 (38) 11.8 μg/m3 (49) 49.0
 
Sept. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 68.0 μg/m3 (56) 16.6 μg/m3 (60) 60.0
 
Sept. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 37.0 μg/m3 (34) 9.8 μg/m3 (41) 41.0
 
Sept. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 8.0 μg/m3 (7) 2.0 μg/m3 (8) 32.0
 
Sept. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 10.0 μg/m3 (42) 42.0
 
Sept. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 37.0 μg/m3 (34) 1.6 μg/m3 (7) 38.0
 
Sept. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 83.0 μg/m3 (64) 11.6 μg/m3 (48) 64.0
 
Sept. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 47.0 μg/m3 (43) 5.7 μg/m3 (24) 43.0
 
Sept. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 28.0 μg/m3 (25) 0.0 μg/m3 (0) 34.0
 
Sept. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 19.0 μg/m3 (17) 6.2 μg/m3 (26) 32.0
 
Sept. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 10.0 μg/m3 (9) 4.2 μg/m3 (18) 31.0
 
Sept. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 9.0 μg/m3 (8) -0.5 μg/m3 (0) 28.0
 
Sept. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 43.0 μg/m3 (39) 6.2 μg/m3 (26) 39.0
 
Sept. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 19.0 μg/m3 (17) 2.5 μg/m3 (10) 17.0
 
Sept. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 10.0 μg/m3 (9) 9.8 μg/m3 (41) 41.0
 
Sept. 15, 2019, 1 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) 4.5 μg/m3 (19) 19.0
 
Sept. 15, 2019, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 8.0 μg/m3 (7) 1.1 μg/m3 (5) 10.0
 
Sept. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 12.0
 
Sept. 15, 2019, 10 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) 1.9 μg/m3 (8) 14.0
 
Sept. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 13.0 μg/m3 (12) 2.7 μg/m3 (11) 12.0
 
Sept. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 18.0 μg/m3 (16) 6.8 μg/m3 (28) 28.0
 
Sept. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 14.0 μg/m3 (13) 9.5 μg/m3 (40) 40.0
 
Sept. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 10.0 μg/m3 (9) 0.5 μg/m3 (2) 13.0
 
Sept. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 17.0 μg/m3 (15) 3.8 μg/m3 (16) 16.0
 
Sept. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 24.0 μg/m3 (22) 5.7 μg/m3 (24) 24.0
 
Sept. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 32.0 μg/m3 (29) 13.8 μg/m3 (54) 54.0
 
Sept. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 21.0 μg/m3 (19) 4.5 μg/m3 (19) 22.0
 
Sept. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 27.0
 
Sept. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 47.0 μg/m3 (43) 10.4 μg/m3 (43) 43.0
 
Sept. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 82.0 μg/m3 (64) 14.9 μg/m3 (56) 64.0
 
Sept. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 56.0 μg/m3 (50) 4.9 μg/m3 (20) 50.0
 
Sept. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 26.0 μg/m3 (24) -0.2 μg/m3 (0) 32.0
 
Sept. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 13.0 μg/m3 (12) -2.2 μg/m3 (0) 32.0
 
Sept. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) -3.7 μg/m3 (0) 32.0
 
Sept. 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 3.0 μg/m3 (3) 3.3 μg/m3 (14) 33.0
 
Sept. 14, 2019, 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) 11.4 μg/m3 (48) 48.0