AQSQID: 300750001

Site Name: Broadus

Location: Powder River Co, MT

Reporting: True, Located: True

Current AQI: 22.0

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. 7, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 24.0 μg/m3 (22) 2.1 μg/m3 (9) 24.0
 
Sept. 7, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 14.0 μg/m3 (13) 9.7 μg/m3 (40) 40.0
 
Sept. 7, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 19.0 μg/m3 (17) 8.1 μg/m3 (34) 34.0
 
Sept. 7, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) 5.4 μg/m3 (23) 23.0
 
Sept. 7, 2019, 11 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) -3.7 μg/m3 (0) 14.0
 
Sept. 7, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 24.0 μg/m3 (22) 7.9 μg/m3 (33) 33.0
 
Sept. 7, 2019, 9 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) 1.4 μg/m3 (6) 16.0
 
Sept. 7, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A -3.0 μg/m3 (0) N/A 11.0
 
Sept. 7, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 8.0 μg/m3 (7) 18.0 μg/m3 (63) 63.0
 
Sept. 7, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 8.0 μg/m3 (7) 16.5 μg/m3 (60) 60.0
 
Sept. 7, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 16.0 μg/m3 (15) 3.4 μg/m3 (14) 18.0
 
Sept. 7, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 3.3 μg/m3 (14) 23.0
 
Sept. 7, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 23.0 μg/m3 (21) 7.9 μg/m3 (33) 33.0
 
Sept. 7, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 23.0 μg/m3 (21) 6.5 μg/m3 (27) 27.0
 
Sept. 7, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 27.0 μg/m3 (25) 12.9 μg/m3 (52) 52.0
 
Sept. 7, 2019, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 24.0 μg/m3 (22) 15.1 μg/m3 (57) 57.0
 
Sept. 6, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 23.0 μg/m3 (21) 21.4 μg/m3 (70) 70.0
 
Sept. 6, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 23.0 μg/m3 (21) 6.6 μg/m3 (28) 31.0
 
Sept. 6, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 23.0 μg/m3 (21) 5.7 μg/m3 (24) 32.0
 
Sept. 6, 2019, 8 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) 9.7 μg/m3 (40) 40.0
 
Sept. 6, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 17.0 μg/m3 (15) 6.0 μg/m3 (25) 32.0
 
Sept. 6, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 23.0 μg/m3 (21) 10.2 μg/m3 (42) 42.0
 
Sept. 6, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 36.0 μg/m3 (33) 24.2 μg/m3 (76) 76.0
 
Sept. 6, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 27.0 μg/m3 (25) 9.5 μg/m3 (40) 40.0
 
Sept. 6, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 43.0 μg/m3 (39) 11.4 μg/m3 (48) 48.0
 
Sept. 6, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 121.0 μg/m3 (83) 28.2 μg/m3 (84) 84.0
 
Sept. 6, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 57.0 μg/m3 (51) 14.5 μg/m3 (55) 55.0
 
Sept. 6, 2019, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 39.0 μg/m3 (35) 11.2 μg/m3 (47) 47.0
 
Sept. 6, 2019, 11 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) 4.6 μg/m3 (19) 22.0
 
Sept. 6, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 15.0 μg/m3 (14) 5.8 μg/m3 (24) 24.0
 
Sept. 6, 2019, 9 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) 5.2 μg/m3 (22) 22.0
 
Sept. 6, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 20.0 μg/m3 (18) 14.8 μg/m3 (56) 56.0
 
Sept. 6, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 18.0 μg/m3 (16) 20.5 μg/m3 (68) 68.0
 
Sept. 6, 2019, 6 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) 6.9 μg/m3 (29) 32.0
 
Sept. 6, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 66.0 μg/m3 (56) 23.0 μg/m3 (73) 73.0
 
Sept. 6, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 62.0 μg/m3 (54) 18.2 μg/m3 (63) 63.0
 
Sept. 6, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 137.0 μg/m3 (91) 31.2 μg/m3 (91) 91.0
 
Sept. 6, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 104.0 μg/m3 (74) 22.4 μg/m3 (72) 74.0
 
Sept. 6, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 118.0 μg/m3 (82) 20.9 μg/m3 (69) 82.0
 
Sept. 6, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 37.3 μg/m3 (104) 104.0
 
Sept. 5, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 98.0 μg/m3 (72) 19.4 μg/m3 (66) 72.0
 
Sept. 5, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 101.0 μg/m3 (73) 19.2 μg/m3 (65) 73.0
 
Sept. 5, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 69.0 μg/m3 (57) 19.4 μg/m3 (66) 66.0
 
Sept. 5, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 42.0 μg/m3 (38) 8.9 μg/m3 (37) 38.0
 
Sept. 5, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 64.0 μg/m3 (54) 17.2 μg/m3 (61) 61.0
 
Sept. 5, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 91.0 μg/m3 (68) 18.9 μg/m3 (65) 68.0
 
Sept. 5, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 68.0 μg/m3 (56) 12.4 μg/m3 (51) 56.0
 
Sept. 5, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 110.0 μg/m3 (78) 29.4 μg/m3 (87) 87.0
 
Sept. 5, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 304.0 μg/m3 (174) 78.5 μg/m3 (162) 174.0
 
Sept. 5, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 513.0 μg/m3 (408) 115.9 μg/m3 (182) 408.0
 
Sept. 5, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 486.0 μg/m3 (376) 113.8 μg/m3 (181) 376.0
 
Sept. 5, 2019, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 67.0 μg/m3 (56) 16.9 μg/m3 (60) 60.0
 
Sept. 5, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 19.0 μg/m3 (17) 5.5 μg/m3 (23) 23.0
 
Sept. 5, 2019, 10 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) 3.7 μg/m3 (15) 24.0
 
Sept. 5, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 13.0 μg/m3 (12) -0.6 μg/m3 (0) 25.0
 
Sept. 5, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 11.0 μg/m3 (10) 1.8 μg/m3 (8) 27.0
 
Sept. 5, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 19.0 μg/m3 (17) 9.9 μg/m3 (41) 41.0
 
Sept. 5, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 50.0 μg/m3 (45) 14.0 μg/m3 (54) 54.0
 
Sept. 5, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 91.0 μg/m3 (68) 16.9 μg/m3 (60) 68.0
 
Sept. 5, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 77.0 μg/m3 (61) 16.1 μg/m3 (59) 61.0
 
Sept. 5, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 25.5 μg/m3 (79) 79.0
 
Sept. 5, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 26.9 μg/m3 (82) 82.0
 
Sept. 5, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 308.0 μg/m3 (176) 69.2 μg/m3 (157) 176.0
 
Sept. 5, 2019, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 230.0 μg/m3 (138) 53.8 μg/m3 (146) 146.0
 
Sept. 4, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 156.0 μg/m3 (100) 37.5 μg/m3 (105) 105.0
 
Sept. 4, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 126.0 μg/m3 (86) 20.6 μg/m3 (68) 86.0
 
Sept. 4, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 39.0 μg/m3 (35) 5.2 μg/m3 (22) 38.0
 
Sept. 4, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 32.0 μg/m3 (29) 7.4 μg/m3 (31) 38.0
 
Sept. 4, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 41.0 μg/m3 (37) 10.6 μg/m3 (44) 44.0
 
Sept. 4, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 24.0 μg/m3 (22) 9.8 μg/m3 (41) 41.0
 
Sept. 4, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 21.0 μg/m3 (19) 6.7 μg/m3 (28) 33.0
 
Sept. 4, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 27.0 μg/m3 (25) 16.5 μg/m3 (60) 60.0
 
Sept. 4, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 22.0 μg/m3 (20) 14.2 μg/m3 (55) 55.0
 
Sept. 4, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 23.0 μg/m3 (21) 10.4 μg/m3 (43) 43.0
 
Sept. 4, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 24.0 μg/m3 (22) 9.4 μg/m3 (39) 39.0
 
Sept. 4, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 18.0 μg/m3 (16) 8.6 μg/m3 (36) 36.0
 
Sept. 4, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 14.0 μg/m3 (13) 5.4 μg/m3 (23) 23.0
 
Sept. 4, 2019, 10 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) 2.3 μg/m3 (10) 20.0
 
Sept. 4, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 14.0 μg/m3 (13) 2.2 μg/m3 (9) 21.0
 
Sept. 4, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 15.0 μg/m3 (14) 4.7 μg/m3 (20) 20.0
 
Sept. 4, 2019, 7 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) 6.5 μg/m3 (27) 27.0
 
Sept. 4, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 116.0 ppb (92) N/A 15.0 μg/m3 (14) 3.9 μg/m3 (16) 92.0
 
Sept. 4, 2019, 5 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) 7.3 μg/m3 (30) 30.0
 
Sept. 4, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 28.0 μg/m3 (25) 5.5 μg/m3 (23) 25.0
 
Sept. 4, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 20.0 μg/m3 (18) 6.7 μg/m3 (28) 28.0
 
Sept. 4, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 5.3 μg/m3 (22) 26.0
 
Sept. 4, 2019, 1 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) 6.5 μg/m3 (27) 27.0
 
Sept. 4, 2019, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A N/A 31.0
 
Sept. 3, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 3, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 39.0 μg/m3 (35) 12.3 μg/m3 (51) 51.0
 
Sept. 3, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 33.0 μg/m3 (30) 14.7 μg/m3 (56) 56.0
 
Sept. 3, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 43.0 μg/m3 (39) 18.7 μg/m3 (64) 64.0
 
Sept. 3, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 24.0 μg/m3 (22) 10.6 μg/m3 (44) 44.0
 
Sept. 3, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 43.0 μg/m3 (39) 9.1 μg/m3 (38) 39.0
 
Sept. 3, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 53.0 μg/m3 (48) 5.4 μg/m3 (23) 48.0
 
Sept. 3, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 46.0 μg/m3 (42) 7.8 μg/m3 (32) 42.0
 
Sept. 3, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 53.0 μg/m3 (48) 10.8 μg/m3 (45) 48.0
 
Sept. 3, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 40.0 μg/m3 (36) 15.8 μg/m3 (58) 58.0
 
Sept. 3, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 13.0 μg/m3 (12) 12.1 μg/m3 (50) 50.0
 
Sept. 3, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) 1.1 μg/m3 (5) 21.0
 
Sept. 3, 2019, 11 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) 2.8 μg/m3 (12) 23.0
 
Sept. 3, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 1.6 μg/m3 (7) 23.0
 
Sept. 3, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) -0.2 μg/m3 (0) 22.0
 
Sept. 3, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Sept. 3, 2019, 7 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) 10.1 μg/m3 (42) 42.0
 
Sept. 3, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 15.0 μg/m3 (14) 5.4 μg/m3 (23) 25.0
 
Sept. 3, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 35.0 μg/m3 (32) 9.9 μg/m3 (41) 41.0
 
Sept. 3, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 13.5 μg/m3 (53) 53.0
 
Sept. 3, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 140.0 μg/m3 (92) 29.4 μg/m3 (87) 92.0
 
Sept. 3, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 106.0 μg/m3 (76) 28.7 μg/m3 (86) 86.0
 
Sept. 3, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 87.0 μg/m3 (66) 21.6 μg/m3 (70) 70.0
 
Sept. 3, 2019, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 54.0 μg/m3 (49) 17.2 μg/m3 (61) 61.0
 
Sept. 2, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 47.0 μg/m3 (43) 13.4 μg/m3 (53) 53.0
 
Sept. 2, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 30.0 μg/m3 (27) 2.1 μg/m3 (9) 32.0
 
Sept. 2, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 28.0 μg/m3 (25) 0.6 μg/m3 (2) 32.0
 
Sept. 2, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 37.0 μg/m3 (34) 4.7 μg/m3 (20) 34.0
 
Sept. 2, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 59.0 μg/m3 (52) 14.4 μg/m3 (55) 55.0
 
Sept. 2, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 43.0 μg/m3 (39) -3.9 μg/m3 (0) 39.0
 
Sept. 2, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 23.0 μg/m3 (21) 5.4 μg/m3 (23) 31.0
 
Sept. 2, 2019, 4 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) 2.5 μg/m3 (10) 26.0
 
Sept. 2, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 5.0 μg/m3 (5) 20.5 μg/m3 (68) 68.0
 
Sept. 2, 2019, 2 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) 8.2 μg/m3 (34) 34.0
 
Sept. 2, 2019, 1 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) 7.7 μg/m3 (32) 32.0
 
Sept. 2, 2019, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 7.0 μg/m3 (6) 6.8 μg/m3 (28) 28.0
 
Sept. 2, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 9.0 μg/m3 (8) -2.0 μg/m3 (0) 13.0
 
Sept. 2, 2019, 10 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) 5.9 μg/m3 (25) 25.0
 
Sept. 2, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 17.0 μg/m3 (15) 2.4 μg/m3 (10) 16.0
 
Sept. 2, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 10.0 μg/m3 (9) -1.3 μg/m3 (0) 18.0
 
Sept. 2, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) 0.1 μg/m3 (0) 20.0
 
Sept. 2, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 25.0 μg/m3 (23) 10.7 μg/m3 (45) 45.0
 
Sept. 2, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 18.0 μg/m3 (16) 12.0 μg/m3 (50) 50.0
 
Sept. 2, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 20.0 μg/m3 (18) 12.4 μg/m3 (51) 51.0
 
Sept. 2, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 27.0 μg/m3 (25) 8.2 μg/m3 (34) 34.0
 
Sept. 2, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 36.0 μg/m3 (33) 2.3 μg/m3 (10) 33.0
 
Sept. 2, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 84.0 μg/m3 (64) 13.1 μg/m3 (52) 64.0
 
Sept. 2, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 63.0 μg/m3 (54) 11.2 μg/m3 (47) 54.0
 
Sept. 1, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 12.0 μg/m3 (11) N/A 31.0
 
Sept. 1, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 0.0 μg/m3 (0) -5.4 μg/m3 (0) 33.0
 
Sept. 1, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 19.0 μg/m3 (17) 1.9 μg/m3 (8) 35.0
 
Sept. 1, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 15.0 μg/m3 (14) 1.8 μg/m3 (8) 33.0
 
Sept. 1, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) -3.9 μg/m3 (0) 35.0
 
Sept. 1, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 17.0 μg/m3 (15) 8.9 μg/m3 (37) 37.0
 
Sept. 1, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 18.0 μg/m3 (16) 14.5 μg/m3 (55) 55.0
 
Sept. 1, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 18.0 μg/m3 (16) 10.1 μg/m3 (42) 42.0
 
Sept. 1, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 37.0 μg/m3 (34) 19.9 μg/m3 (67) 67.0
 
Sept. 1, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 67.0 μg/m3 (56) 32.4 μg/m3 (93) 93.0
 
Sept. 1, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 57.0 μg/m3 (51) 21.0 μg/m3 (69) 69.0
 
Sept. 1, 2019, noon N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 13.0 μg/m3 (12) 2.8 μg/m3 (12) 12.0
 
Sept. 1, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 11.0 μg/m3 (10) 0.6 μg/m3 (2) 10.0
 
Sept. 1, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 20.0 μg/m3 (18) 3.8 μg/m3 (16) 18.0
 
Sept. 1, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 16.0 μg/m3 (15) 3.8 μg/m3 (16) 16.0
 
Sept. 1, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 17.0 μg/m3 (15) 11.5 μg/m3 (48) 48.0
 
Sept. 1, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 16.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
Sept. 1, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 15.0 μg/m3 (14) 6.1 μg/m3 (25) 25.0
 
Sept. 1, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 20.0 μg/m3 (18) 5.8 μg/m3 (24) 24.0
 
Sept. 1, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 32.0 μg/m3 (29) 5.3 μg/m3 (22) 29.0
 
Sept. 1, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 46.0 μg/m3 (42) 11.3 μg/m3 (47) 47.0
 
Sept. 1, 2019, 2 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) 2.5 μg/m3 (10) 25.0
 
Sept. 1, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 25.0 μg/m3 (23) 9.7 μg/m3 (40) 40.0
 
Sept. 1, 2019, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 50.0 μg/m3 (45) 10.4 μg/m3 (43) 45.0
 
Aug. 31, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 50.0 μg/m3 (45) 13.6 μg/m3 (53) 53.0
 
Aug. 31, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 30.0 μg/m3 (27) 11.0 μg/m3 (46) 46.0
 
Aug. 31, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 30.0 μg/m3 (27) 3.8 μg/m3 (16) 32.0
 
Aug. 31, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 8.0 μg/m3 (7) -1.9 μg/m3 (0) 32.0
 
Aug. 31, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 14.0 μg/m3 (13) 1.0 μg/m3 (4) 32.0
 
Aug. 31, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 20.0 μg/m3 (18) 5.8 μg/m3 (24) 29.0
 
Aug. 31, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 27.0 μg/m3 (25) 11.0 μg/m3 (46) 46.0
 
Aug. 31, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 37.0 μg/m3 (34) 12.1 μg/m3 (50) 50.0