AQSQID: 300270006

Site Name: Lewistown

Location: Lewistown (E Aztec Dr), MT

Reporting: True, Located: True

Current AQI: 30.0

Lewistown (E Aztec Dr) MT, US: 47.048537, -109.455315

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 7.0 μg/m3 (6) 5.4 μg/m3 (23) 30.0
 
Jan. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) -3.9 μg/m3 (0) 29.0
 
Jan. 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 11.0 μg/m3 (10) 1.8 μg/m3 (8) 29.0
 
Jan. 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 6.4 μg/m3 (27) 30.0
 
Jan. 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) -2.7 μg/m3 (0) 30.0
 
Jan. 22, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 4.0 μg/m3 (17) 31.0
 
Jan. 22, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) -1.0 μg/m3 (0) 28.0
 
Jan. 22, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) 8.9 μg/m3 (37) 37.0
 
Jan. 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 9.0 μg/m3 (8) N/A 30.0
 
Jan. 22, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 18.0 μg/m3 (16) 21.6 μg/m3 (70) 70.0
 
Jan. 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 8.0 μg/m3 (7) 21.0 μg/m3 (69) 69.0
 
Jan. 21, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 8.0 μg/m3 (7) -0.8 μg/m3 (0) 32.0
 
Jan. 21, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 2.0 μg/m3 (2) 4.2 μg/m3 (18) 34.0
 
Jan. 21, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 10.8 μg/m3 (45) 45.0
 
Jan. 21, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) -3.8 μg/m3 (0) 8.0
 
Jan. 21, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 6.7 μg/m3 (28) 28.0
 
Jan. 21, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 3.0 μg/m3 (3) 1.4 μg/m3 (6) 32.0
 
Jan. 21, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 10.0 μg/m3 (9) -2.0 μg/m3 (0) 28.0
 
Jan. 21, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) N/A 27.0
 
Jan. 21, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) -3.4 μg/m3 (0) 25.0
 
Jan. 21, 2020, 1 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) 6.0 μg/m3 (25) 27.0
 
Jan. 21, 2020, noon 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
 
Jan. 21, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 4.0 μg/m3 (4) N/A 32.0
 
Jan. 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 16.6 μg/m3 (60) 60.0
 
Jan. 21, 2020, 9 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) -1.7 μg/m3 (0) 32.0
 
Jan. 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 32.0
 
Jan. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 0.3 μg/m3 (1) 33.0
 
Jan. 21, 2020, 6 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) -4.7 μg/m3 (0) 32.0
 
Jan. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 0.0 μg/m3 (0) 9.4 μg/m3 (39) 39.0
 
Jan. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 3.0 μg/m3 (3) 6.6 μg/m3 (28) 31.0
 
Jan. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 1.0 μg/m3 (1) N/A 32.0
 
Jan. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 5.0 μg/m3 (5) N/A 35.0
 
Jan. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 2.0 μg/m3 (2) 5.3 μg/m3 (22) 34.0
 
Jan. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 16.0 μg/m3 (15) -0.5 μg/m3 (0) 34.0
 
Jan. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 22.0 μg/m3 (20) 10.6 μg/m3 (44) 44.0
 
Jan. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 2.0 μg/m3 (2) 7.1 μg/m3 (30) 35.0
 
Jan. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 1.0 μg/m3 (1) -4.7 μg/m3 (0) 35.0
 
Jan. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 7.5 μg/m3 (31) 31.0
 
Jan. 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 1.0 μg/m3 (1) -0.1 μg/m3 (0) 35.0
 
Jan. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 9.2 μg/m3 (38) 38.0
 
Jan. 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 28.0
 
Jan. 20, 2020, 4 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) 16.0 μg/m3 (59) 59.0
 
Jan. 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) 34.9 μg/m3 (99) 99.0
 
Jan. 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (12) 28.0
 
Jan. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) N/A 29.0
 
Jan. 20, 2020, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (8) 28.0
 
Jan. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 0.0 μg/m3 (0) 6.5 μg/m3 (27) 28.0
 
Jan. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) -2.1 μg/m3 (0) 28.0
 
Jan. 20, 2020, 9 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) -4.3 μg/m3 (0) 29.0
 
Jan. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) -4.6 μg/m3 (0) 28.0
 
Jan. 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 11.0 μg/m3 (10) N/A 28.0
 
Jan. 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 27.0
 
Jan. 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A -1.0 μg/m3 (0) -2.6 μg/m3 (0) 25.0
 
Jan. 20, 2020, 4 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) 10.4 μg/m3 (43) 43.0
 
Jan. 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 25.0
 
Jan. 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) N/A 24.0
 
Jan. 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) -1.7 μg/m3 (0) 24.0
 
Jan. 20, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 2.1 μg/m3 (9) 28.0
 
Jan. 19, 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) 0.1 μg/m3 (0) 28.0
 
Jan. 19, 2020, 10 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) 5.0 μg/m3 (21) 30.0
 
Jan. 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A -1.0 μg/m3 (0) 12.5 μg/m3 (51) 51.0
 
Jan. 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 1.0 μg/m3 (1) N/A 31.0
 
Jan. 19, 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 (4) 8.2 μg/m3 (34) 34.0
 
Jan. 19, 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 (0) 0.4 μg/m3 (2) 30.0
 
Jan. 19, 2020, 5 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) N/A 27.0
 
Jan. 19, 2020, 4 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) 5.3 μg/m3 (22) 25.0
 
Jan. 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) N/A 26.0
 
Jan. 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) -2.6 μg/m3 (0) 28.0
 
Jan. 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 10.5 μg/m3 (44) 44.0
 
Jan. 19, 2020, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 28.0
 
Jan. 19, 2020, 11 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) -2.4 μg/m3 (0) 27.0
 
Jan. 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) N/A 27.0
 
Jan. 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 8.0 μg/m3 (7) 9.8 μg/m3 (41) 41.0
 
Jan. 19, 2020, 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) -2.7 μg/m3 (0) 27.0
 
Jan. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 9.0 μg/m3 (8) N/A 28.0
 
Jan. 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 0.0 μg/m3 (0) -4.4 μg/m3 (0) 28.0
 
Jan. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 1.0 μg/m3 (1) 2.6 μg/m3 (11) 27.0
 
Jan. 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2020, 3 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) 11.6 μg/m3 (48) 48.0
 
Jan. 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 22.0 μg/m3 (20) 17.8 μg/m3 (62) 62.0
 
Jan. 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 19.0 μg/m3 (17) 14.2 μg/m3 (55) 55.0
 
Jan. 19, 2020, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 16.0 μg/m3 (15) 35.1 μg/m3 (99) 99.0
 
Jan. 18, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 12.0 μg/m3 (11) 30.9 μg/m3 (90) 90.0
 
Jan. 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 19.0 μg/m3 (17) 4.5 μg/m3 (19) 20.0
 
Jan. 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 15.0 μg/m3 (14) 19.0 μg/m3 (65) 65.0
 
Jan. 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 20.0 μg/m3 (18) 21.2 μg/m3 (70) 70.0
 
Jan. 18, 2020, 7 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) 3.9 μg/m3 (16) 19.0
 
Jan. 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) 10.6 μg/m3 (44) 44.0
 
Jan. 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 11.0 μg/m3 (10) 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 21.0 μg/m3 (19) 8.8 μg/m3 (37) 37.0
 
Jan. 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 26.0 μg/m3 (24) 16.5 μg/m3 (60) 60.0
 
Jan. 18, 2020, 2 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) 9.4 μg/m3 (39) 39.0
 
Jan. 18, 2020, 1 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) 14.3 μg/m3 (55) 55.0
 
Jan. 18, 2020, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 16.0 μg/m3 (15) 11.8 μg/m3 (49) 49.0
 
Jan. 18, 2020, 11 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) 5.2 μg/m3 (22) 22.0
 
Jan. 18, 2020, 10 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) 4.0 μg/m3 (17) 18.0
 
Jan. 18, 2020, 9 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) 8.2 μg/m3 (34) 34.0
 
Jan. 18, 2020, 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) -4.9 μg/m3 (0) 23.0
 
Jan. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 17.0 μg/m3 (15) N/A 19.0
 
Jan. 18, 2020, 6 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) 6.8 μg/m3 (28) 28.0
 
Jan. 18, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 16.0 μg/m3 (15) 20.0 μg/m3 (67) 67.0
 
Jan. 18, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 18.0 μg/m3 (16) 12.9 μg/m3 (52) 52.0
 
Jan. 18, 2020, 3 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) 13.2 μg/m3 (53) 53.0
 
Jan. 18, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 28.0 μg/m3 (25) 15.8 μg/m3 (58) 58.0
 
Jan. 18, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 30.0 μg/m3 (27) 17.0 μg/m3 (61) 61.0
 
Jan. 18, 2020, midnight N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 29.0 μg/m3 (26) 13.9 μg/m3 (54) 54.0
 
Jan. 17, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 22.0 μg/m3 (20) 15.0 μg/m3 (56) 56.0
 
Jan. 17, 2020, 10 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) 17.3 μg/m3 (61) 61.0
 
Jan. 17, 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) 10.4 μg/m3 (43) 43.0
 
Jan. 17, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 15.0 μg/m3 (14) -3.3 μg/m3 (0) 19.0
 
Jan. 17, 2020, 7 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) 9.2 μg/m3 (38) 38.0
 
Jan. 17, 2020, 6 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) 5.9 μg/m3 (25) 25.0
 
Jan. 17, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 10.0 μg/m3 (9) 20.8 μg/m3 (69) 69.0
 
Jan. 17, 2020, 4 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) 11.3 μg/m3 (47) 47.0
 
Jan. 17, 2020, 3 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) 8.8 μg/m3 (37) 37.0
 
Jan. 17, 2020, 2 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) 8.8 μg/m3 (37) 37.0
 
Jan. 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 6.0 μg/m3 (5) 7.8 μg/m3 (32) 32.0
 
Jan. 17, 2020, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 18.0
 
Jan. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 6.4 μg/m3 (27) 27.0
 
Jan. 17, 2020, 10 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) 6.1 μg/m3 (25) 25.0
 
Jan. 17, 2020, 9 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) 5.3 μg/m3 (22) 22.0
 
Jan. 17, 2020, 8 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) 3.3 μg/m3 (14) 18.0
 
Jan. 17, 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) 17.6 μg/m3 (62) 62.0
 
Jan. 17, 2020, 6 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 (0) 20.0
 
Jan. 17, 2020, 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) 6.1 μg/m3 (25) 25.0
 
Jan. 17, 2020, 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) N/A 22.0
 
Jan. 17, 2020, 3 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) 4.6 μg/m3 (19) 24.0
 
Jan. 17, 2020, 2 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) 1.2 μg/m3 (5) 28.0
 
Jan. 17, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 1.7 μg/m3 (7) 25.0
 
Jan. 17, 2020, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 9.6 μg/m3 (40) 40.0
 
Jan. 16, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 3.1 μg/m3 (13) 22.0
 
Jan. 16, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (18) 27.0
 
Jan. 16, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 15.0 μg/m3 (14) 11.6 μg/m3 (48) 48.0
 
Jan. 16, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 12.0 μg/m3 (11) 11.4 μg/m3 (48) 48.0
 
Jan. 16, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 9.3 μg/m3 (39) 39.0
 
Jan. 16, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (8) 25.0
 
Jan. 16, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 8.6 μg/m3 (36) 36.0
 
Jan. 16, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) -0.4 μg/m3 (0) 25.0
 
Jan. 16, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 5.3 μg/m3 (22) 24.0
 
Jan. 16, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 8.4 μg/m3 (35) 35.0
 
Jan. 16, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 1.0 μg/m3 (1) 1.9 μg/m3 (8) 17.0
 
Jan. 16, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) 8.8 μg/m3 (37) 37.0
 
Jan. 16, 2020, 11 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) 0.4 μg/m3 (2) 21.0
 
Jan. 16, 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) 5.7 μg/m3 (24) 24.0
 
Jan. 16, 2020, 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) -4.4 μg/m3 (0) 24.0
 
Jan. 16, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 5.0 μg/m3 (5) 20.5 μg/m3 (68) 68.0
 
Jan. 16, 2020, 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) 23.9 μg/m3 (75) 75.0
 
Jan. 16, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 3.2 μg/m3 (13) 26.0
 
Jan. 16, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) 0.6 μg/m3 (2) 28.0
 
Jan. 16, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 0.0 μg/m3 (0) 1.3 μg/m3 (5) 28.0
 
Jan. 16, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) -2.1 μg/m3 (0) 28.0
 
Jan. 16, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 8.0 μg/m3 (7) -4.2 μg/m3 (0) 27.0
 
Jan. 16, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 9.1 μg/m3 (38) 38.0
 
Jan. 16, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 14.5 μg/m3 (55) 55.0
 
Jan. 15, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 4.5 μg/m3 (19) 31.0
 
Jan. 15, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) 4.1 μg/m3 (17) 32.0
 
Jan. 15, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 6.0 μg/m3 (5) 5.4 μg/m3 (23) 32.0
 
Jan. 15, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 4.0 μg/m3 (4) -5.0 μg/m3 (0) 32.0
 
Jan. 15, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) 6.3 μg/m3 (26) 28.0
 
Jan. 15, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A -2.0 μg/m3 (0) N/A 24.0
 
Jan. 15, 2020, 5 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) 9.3 μg/m3 (39) 39.0
 
Jan. 15, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 3.7 μg/m3 (15) 18.0
 
Jan. 15, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 13.0 μg/m3 (12) 17.9 μg/m3 (63) 63.0
 
Jan. 15, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 11.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 14.0
 
Jan. 15, 2020, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) -0.7 μg/m3 (0) 14.0
 
Jan. 15, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2020, 10 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) 1.5 μg/m3 (6) 20.0