ID: 2424

AQSQID: 300270006

Site Name: Lewistown

Added: April 21, 2020, 6:24 p.m.

Updated: Sept. 27, 2020, 6:40 p.m.

Location: Lewistown (E Aztec Dr), MT

Reporting: True, Located: True

Current AQI: 32.0

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
Sept. 27, 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) 2.7 μg/m3 (11) 32.0
 
Sept. 27, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 31.0
 
Sept. 27, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 15.0 μg/m3 (14) 3.6 μg/m3 (15) 30.0
 
Sept. 27, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 28.0
 
Sept. 27, 2020, 1 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) 3.1 μg/m3 (13) 28.0
 
Sept. 27, 2020, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 2.8 μg/m3 (12) 28.0
 
Sept. 27, 2020, 11 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) 1.6 μg/m3 (7) 29.0
 
Sept. 27, 2020, 10 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) 3.2 μg/m3 (13) 30.0
 
Sept. 27, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 8.0 μg/m3 (7) 2.0 μg/m3 (8) 29.0
 
Sept. 27, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 5.0 μg/m3 (5) -1.9 μg/m3 (0) 29.0
 
Sept. 27, 2020, 7 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) 0.1 μg/m3 (0) 31.0
 
Sept. 27, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) 0.4 μg/m3 (2) 32.0
 
Sept. 27, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 11.0 μg/m3 (10) 2.8 μg/m3 (12) 33.0
 
Sept. 27, 2020, 4 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) 3.1 μg/m3 (13) 32.0
 
Sept. 27, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 8.0 μg/m3 (7) 2.9 μg/m3 (12) 33.0
 
Sept. 27, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (7) 33.0
 
Sept. 27, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 12.0 μg/m3 (11) 1.0 μg/m3 (4) 33.0
 
Sept. 27, 2020, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 13.0 μg/m3 (12) 4.9 μg/m3 (20) 33.0
 
Sept. 26, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 9.0 μg/m3 (8) 2.6 μg/m3 (11) 34.0
 
Sept. 26, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 6.0 μg/m3 (5) 1.8 μg/m3 (8) 34.0
 
Sept. 26, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 12.0 μg/m3 (11) 1.8 μg/m3 (8) 34.0
 
Sept. 26, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 3.4 μg/m3 (14) 33.0
 
Sept. 26, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 13.0 μg/m3 (12) 1.3 μg/m3 (5) 32.0
 
Sept. 26, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 23.0 μg/m3 (21) 2.6 μg/m3 (11) 33.0
 
Sept. 26, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 26.0 μg/m3 (24) 3.1 μg/m3 (13) 33.0
 
Sept. 26, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 32.0 μg/m3 (29) 6.6 μg/m3 (28) 34.0
 
Sept. 26, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 17.0 μg/m3 (15) 5.9 μg/m3 (25) 34.0
 
Sept. 26, 2020, 2 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) 0.9 μg/m3 (4) 32.0
 
Sept. 26, 2020, 1 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) 4.4 μg/m3 (18) 32.0
 
Sept. 26, 2020, noon N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 32.0
 
Sept. 26, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 31.0
 
Sept. 26, 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) 2.0 μg/m3 (8) 31.0
 
Sept. 26, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) 6.3 μg/m3 (26) 33.0
 
Sept. 26, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) -1.9 μg/m3 (0) 34.0
 
Sept. 26, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 10.0 μg/m3 (9) -4.1 μg/m3 (0) 34.0
 
Sept. 26, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 33.0
 
Sept. 26, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 15.0 μg/m3 (14) 1.0 μg/m3 (4) 33.0
 
Sept. 26, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 23.0 μg/m3 (21) 4.7 μg/m3 (20) 32.0
 
Sept. 26, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 21.0 μg/m3 (19) 5.2 μg/m3 (22) 32.0
 
Sept. 26, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 29.0 μg/m3 (26) 5.4 μg/m3 (23) 34.0
 
Sept. 26, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 22.0 μg/m3 (20) 7.2 μg/m3 (30) 33.0
 
Sept. 26, 2020, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 48.0 μg/m3 (44) 8.6 μg/m3 (36) 44.0
 
Sept. 25, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 41.0 μg/m3 (37) 10.4 μg/m3 (43) 43.0
 
Sept. 25, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 21.0 μg/m3 (19) 5.3 μg/m3 (22) 38.0
 
Sept. 25, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 20.0 μg/m3 (18) 2.5 μg/m3 (10) 35.0
 
Sept. 25, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 16.0 μg/m3 (15) 0.0 μg/m3 (0) 36.0
 
Sept. 25, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 2.0 μg/m3 (2) 0.9 μg/m3 (4) 36.0
 
Sept. 25, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 6.0 μg/m3 (5) 1.9 μg/m3 (8) 36.0
 
Sept. 25, 2020, 5 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) 0.6 μg/m3 (2) 35.0
 
Sept. 25, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 12.0 μg/m3 (11) 5.8 μg/m3 (24) 35.0
 
Sept. 25, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 41.0 μg/m3 (37) 3.9 μg/m3 (16) 37.0
 
Sept. 25, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 50.0 μg/m3 (45) 7.0 μg/m3 (29) 45.0
 
Sept. 25, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 33.0 μg/m3 (30) 2.6 μg/m3 (11) 30.0
 
Sept. 25, 2020, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 30.0
 
Sept. 25, 2020, 11 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) 2.0 μg/m3 (8) 29.0
 
Sept. 25, 2020, 10 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) 0.6 μg/m3 (2) 30.0
 
Sept. 25, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) 0.4 μg/m3 (2) 32.0
 
Sept. 25, 2020, 8 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) 3.0 μg/m3 (12) 30.0
 
Sept. 25, 2020, 7 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) -0.6 μg/m3 (0) 30.0
 
Sept. 25, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 6.0 μg/m3 (5) 0.9 μg/m3 (4) 31.0
 
Sept. 25, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 6.0 μg/m3 (5) -0.8 μg/m3 (0) 29.0
 
Sept. 25, 2020, 4 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) 0.6 μg/m3 (2) 31.0
 
Sept. 25, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 12.0 μg/m3 (11) 3.8 μg/m3 (16) 32.0
 
Sept. 25, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 14.0 μg/m3 (13) 1.7 μg/m3 (7) 33.0
 
Sept. 25, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 19.0 μg/m3 (17) 2.3 μg/m3 (10) 35.0
 
Sept. 25, 2020, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 52.0 μg/m3 (47) 3.5 μg/m3 (15) 47.0
 
Sept. 24, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 43.0 μg/m3 (39) 2.9 μg/m3 (12) 39.0
 
Sept. 24, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 34.0 μg/m3 (31) 7.5 μg/m3 (31) 38.0
 
Sept. 24, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 47.0 μg/m3 (43) 8.0 μg/m3 (33) 43.0
 
Sept. 24, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 46.0 μg/m3 (42) 14.3 μg/m3 (55) 55.0
 
Sept. 24, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 49.0 μg/m3 (45) 22.3 μg/m3 (72) 72.0
 
Sept. 24, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 50.0 μg/m3 (45) 23.1 μg/m3 (74) 74.0
 
Sept. 24, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 31.0 μg/m3 (28) 12.3 μg/m3 (51) 51.0
 
Sept. 24, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 32.0 μg/m3 (29) 18.7 μg/m3 (64) 64.0
 
Sept. 24, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 40.0 μg/m3 (36) 25.8 μg/m3 (79) 79.0
 
Sept. 24, 2020, 2 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) 13.2 μg/m3 (53) 53.0
 
Sept. 24, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 32.0 μg/m3 (29) 11.7 μg/m3 (49) 49.0
 
Sept. 24, 2020, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 23.0 μg/m3 (21) 11.9 μg/m3 (50) 50.0
 
Sept. 24, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 23.0 μg/m3 (21) 12.9 μg/m3 (52) 52.0
 
Sept. 24, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 24.0 μg/m3 (22) 16.4 μg/m3 (59) 59.0
 
Sept. 24, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 20.0 μg/m3 (18) 17.2 μg/m3 (61) 61.0
 
Sept. 24, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 22.0 μg/m3 (20) 14.0 μg/m3 (54) 54.0
 
Sept. 24, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 17.0 μg/m3 (15) 12.5 μg/m3 (51) 51.0
 
Sept. 24, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 22.0 μg/m3 (20) 16.3 μg/m3 (59) 59.0
 
Sept. 24, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 28.0 μg/m3 (25) 18.1 μg/m3 (63) 63.0
 
Sept. 24, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 29.0 μg/m3 (26) 18.0 μg/m3 (63) 63.0
 
Sept. 24, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 30.0 μg/m3 (27) 15.3 μg/m3 (57) 57.0
 
Sept. 24, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 34.0 μg/m3 (31) 18.9 μg/m3 (65) 65.0
 
Sept. 24, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 35.0 μg/m3 (32) 16.2 μg/m3 (59) 59.0
 
Sept. 24, 2020, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 40.0 μg/m3 (36) 21.4 μg/m3 (70) 70.0
 
Sept. 23, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 35.0 μg/m3 (32) 19.9 μg/m3 (67) 67.0
 
Sept. 23, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 28.0 μg/m3 (25) 20.8 μg/m3 (69) 69.0
 
Sept. 23, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 31.0 μg/m3 (28) 22.4 μg/m3 (72) 72.0
 
Sept. 23, 2020, 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) 23.8 μg/m3 (75) 75.0
 
Sept. 23, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 33.0 μg/m3 (30) 24.5 μg/m3 (77) 77.0
 
Sept. 23, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 28.0 μg/m3 (25) 20.0 μg/m3 (67) 67.0
 
Sept. 23, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 30.0 μg/m3 (27) 22.7 μg/m3 (73) 73.0
 
Sept. 23, 2020, 4 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) 19.5 μg/m3 (66) 66.0
 
Sept. 23, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 20.0 μg/m3 (18) 15.1 μg/m3 (57) 57.0
 
Sept. 23, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 21.0 μg/m3 (19) 12.4 μg/m3 (51) 51.0
 
Sept. 23, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 18.0 μg/m3 (16) 10.1 μg/m3 (42) 42.0
 
Sept. 23, 2020, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 20.0
 
Sept. 23, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 19.0 μg/m3 (17) 9.8 μg/m3 (41) 41.0
 
Sept. 23, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 18.0 μg/m3 (16) 4.6 μg/m3 (19) 19.0
 
Sept. 23, 2020, 9 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) 7.5 μg/m3 (31) 31.0
 
Sept. 23, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 20.0 μg/m3 (18) 11.3 μg/m3 (47) 47.0
 
Sept. 23, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 22.0 μg/m3 (20) 20.8 μg/m3 (69) 69.0
 
Sept. 23, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 16.0 μg/m3 (15) 3.7 μg/m3 (15) 23.0
 
Sept. 23, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 22.0 μg/m3 (20) 8.2 μg/m3 (34) 34.0
 
Sept. 23, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 27.0 μg/m3 (25) 6.5 μg/m3 (27) 27.0
 
Sept. 23, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 25.0 μg/m3 (23) 8.6 μg/m3 (36) 36.0
 
Sept. 23, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 22.0 μg/m3 (20) 6.6 μg/m3 (28) 30.0
 
Sept. 23, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 28.0 μg/m3 (25) 10.1 μg/m3 (42) 42.0
 
Sept. 23, 2020, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 24.0 μg/m3 (22) 9.5 μg/m3 (40) 40.0
 
Sept. 22, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 16.0 μg/m3 (15) 12.4 μg/m3 (51) 51.0
 
Sept. 22, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 30.0 μg/m3 (27) 14.2 μg/m3 (55) 55.0
 
Sept. 22, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 24.0 μg/m3 (22) 9.1 μg/m3 (38) 41.0
 
Sept. 22, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 18.0 μg/m3 (16) 7.3 μg/m3 (30) 43.0
 
Sept. 22, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 6.7 μg/m3 (28) 28.0
 
Sept. 22, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 7.9 μg/m3 (33) 33.0
 
Sept. 22, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 23.0 μg/m3 (21) 10.6 μg/m3 (44) 44.0
 
Sept. 22, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (24) 18.7 μg/m3 (64) 64.0
 
Sept. 22, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (24) 24.9 μg/m3 (77) 77.0
 
Sept. 22, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 7.2 μg/m3 (30) 30.0
 
Sept. 22, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 14.0 μg/m3 (13) 6.9 μg/m3 (29) 34.0
 
Sept. 22, 2020, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 18.0 μg/m3 (16) 7.7 μg/m3 (32) 35.0
 
Sept. 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 36.0
 
Sept. 22, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 9.0 μg/m3 (8) 7.4 μg/m3 (31) 38.0
 
Sept. 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 10.0 μg/m3 (9) 7.8 μg/m3 (32) 35.0
 
Sept. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 14.0 μg/m3 (13) 3.2 μg/m3 (13) 37.0
 
Sept. 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 14.0 μg/m3 (13) 8.8 μg/m3 (37) 37.0
 
Sept. 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 10.0 μg/m3 (9) 4.7 μg/m3 (20) 38.0
 
Sept. 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 8.0 μg/m3 (7) 6.7 μg/m3 (28) 38.0
 
Sept. 22, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 39.0
 
Sept. 22, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 17.0 μg/m3 (15) 8.2 μg/m3 (34) 40.0
 
Sept. 22, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 29.0 μg/m3 (26) 2.8 μg/m3 (12) 41.0
 
Sept. 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 21.0 μg/m3 (19) 8.7 μg/m3 (36) 43.0
 
Sept. 22, 2020, midnight N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 10.0 μg/m3 (9) 9.8 μg/m3 (41) 47.0
 
Sept. 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A -1.0 μg/m3 (0) 8.2 μg/m3 (34) 48.0
 
Sept. 21, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 8.0 μg/m3 (7) 3.2 μg/m3 (13) 47.0
 
Sept. 21, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 9.0 μg/m3 (8) 5.7 μg/m3 (24) 45.0
 
Sept. 21, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 7.0 μg/m3 (6) 6.6 μg/m3 (28) 44.0
 
Sept. 21, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 10.0 μg/m3 (9) 5.9 μg/m3 (25) 43.0
 
Sept. 21, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 10.0 μg/m3 (9) 5.3 μg/m3 (22) 41.0
 
Sept. 21, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 14.0 μg/m3 (13) 10.6 μg/m3 (44) 44.0
 
Sept. 21, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 11.0 μg/m3 (10) 9.2 μg/m3 (38) 42.0
 
Sept. 21, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 11.0 μg/m3 (10) 13.2 μg/m3 (53) 53.0
 
Sept. 21, 2020, 2 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
 
Sept. 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 8.0 μg/m3 (7) 5.6 μg/m3 (23) 28.0
 
Sept. 21, 2020, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 11.0 μg/m3 (10) 10.7 μg/m3 (45) 45.0
 
Sept. 21, 2020, 11 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) 4.8 μg/m3 (20) 30.0
 
Sept. 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 13.0 μg/m3 (12) 6.3 μg/m3 (26) 28.0
 
Sept. 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 6.0 μg/m3 (5) 6.2 μg/m3 (26) 34.0
 
Sept. 21, 2020, 8 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) 5.0 μg/m3 (21) 33.0
 
Sept. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 8.0 μg/m3 (7) 5.2 μg/m3 (22) 30.0
 
Sept. 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 9.0 μg/m3 (8) 5.6 μg/m3 (23) 33.0
 
Sept. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 11.0 μg/m3 (10) 9.2 μg/m3 (38) 38.0
 
Sept. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) 6.9 μg/m3 (29) 29.0
 
Sept. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 16.0 μg/m3 (15) 6.3 μg/m3 (26) 27.0
 
Sept. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 18.0 μg/m3 (16) 6.3 μg/m3 (26) 28.0
 
Sept. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 22.0 μg/m3 (20) 9.9 μg/m3 (41) 41.0
 
Sept. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 12.0 μg/m3 (11) 8.5 μg/m3 (35) 35.0
 
Sept. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 3.0 μg/m3 (3) 9.2 μg/m3 (38) 38.0
 
Sept. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 10.0 μg/m3 (9) 5.8 μg/m3 (24) 36.0
 
Sept. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 16.0 μg/m3 (15) 9.4 μg/m3 (39) 39.0
 
Sept. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 11.0 μg/m3 (10) 8.4 μg/m3 (35) 37.0
 
Sept. 20, 2020, 7 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) 6.6 μg/m3 (28) 37.0
 
Sept. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 14.0 μg/m3 (13) 9.7 μg/m3 (40) 40.0