ID: 2424

AQSQID: 300270006

Site Name: Lewistown

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

Updated: Oct. 19, 2021, 11:03 a.m.

Location: Lewistown (E Aztec Dr), MT

Reporting: True, Located: True

Current AQI: 31.0

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
Oct. 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 11.0 μg/m3 (11) 7.4 μg/m3 (31) 31.0
 
Oct. 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 21.0 μg/m3 (20) 4.7 μg/m3 (20) 20.0
 
Oct. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 23.0 μg/m3 (22) 5.4 μg/m3 (23) 23.0
 
Oct. 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 17.0 μg/m3 (16) 9.3 μg/m3 (39) 39.0
 
Oct. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 25.0 μg/m3 (24) 2.6 μg/m3 (11) 24.0
 
Oct. 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 17.0 μg/m3 (16) 6.4 μg/m3 (27) 27.0
 
Oct. 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 17.0 μg/m3 (16) 7.8 μg/m3 (33) 33.0
 
Oct. 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 11.0 μg/m3 (11) 7.3 μg/m3 (31) 31.0
 
Oct. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 21.0 μg/m3 (20) 7.8 μg/m3 (33) 33.0
 
Oct. 19, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 26.0 μg/m3 (25) 4.7 μg/m3 (20) 34.0
 
Oct. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 19.0 μg/m3 (18) 3.9 μg/m3 (17) 35.0
 
Oct. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 28.0 μg/m3 (26) 5.8 μg/m3 (25) 36.0
 
Oct. 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 15.0 μg/m3 (14) 3.2 μg/m3 (14) 38.0
 
Oct. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 16.0 μg/m3 (15) 3.1 μg/m3 (13) 44.0
 
Oct. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 10.0 μg/m3 (10) 6.1 μg/m3 (26) 42.0
 
Oct. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 15.0 μg/m3 (14) 4.4 μg/m3 (19) 41.0
 
Oct. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 23.0 μg/m3 (22) 6.0 μg/m3 (25) 39.0
 
Oct. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 21.0 μg/m3 (20) 7.1 μg/m3 (30) 38.0
 
Oct. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 8.0 μg/m3 (8) N/A 35.0
 
Oct. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 36.0 μg/m3 (34) 8.1 μg/m3 (34) 34.0
 
Oct. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 67.0 μg/m3 (57) 6.4 μg/m3 (27) 57.0
 
Oct. 18, 2021, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 30.0 μg/m3 (28) 9.6 μg/m3 (40) 40.0
 
Oct. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 35.0
 
Oct. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 5.0 μg/m3 (5) 2.5 μg/m3 (11) 38.0
 
Oct. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 7.0 μg/m3 (7) 4.6 μg/m3 (20) 38.0
 
Oct. 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 5.0 μg/m3 (5) 4.9 μg/m3 (21) 41.0
 
Oct. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A -2.6 μg/m3 (0) 38.0
 
Oct. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 5.0 μg/m3 (5) -1.9 μg/m3 (0) 36.0
 
Oct. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 3.0 μg/m3 (3) 4.9 μg/m3 (21) 36.0
 
Oct. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 2.0 μg/m3 (2) -0.7 μg/m3 (0) 36.0
 
Oct. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 32.0
 
Oct. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 20.0 μg/m3 (19) 4.3 μg/m3 (18) 33.0
 
Oct. 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 23.0 μg/m3 (22) 1.1 μg/m3 (5) 34.0
 
Oct. 18, 2021, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 16.0 μg/m3 (15) 1.2 μg/m3 (5) 36.0
 
Oct. 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 4.0 μg/m3 (4) 2.4 μg/m3 (10) 40.0
 
Oct. 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 3.0 μg/m3 (3) 3.6 μg/m3 (16) 43.0
 
Oct. 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 2.0 μg/m3 (2) 0.7 μg/m3 (3) 43.0
 
Oct. 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 4.0 μg/m3 (4) -1.6 μg/m3 (0) 44.0
 
Oct. 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 0.0 μg/m3 (0) 0.6 μg/m3 (3) 47.0
 
Oct. 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 2.0 μg/m3 (2) 2.1 μg/m3 (9) 50.0
 
Oct. 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (5) 48.0
 
Oct. 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 45.0
 
Oct. 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -4.0 μg/m3 (0) 2.7 μg/m3 (12) 37.0
 
Oct. 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -1.0 μg/m3 (0) 1.5 μg/m3 (7) 37.0
 
Oct. 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 7.0 μg/m3 (7) 3.9 μg/m3 (17) 38.0
 
Oct. 17, 2021, noon N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 5.0 μg/m3 (5) -3.1 μg/m3 (0) 38.0
 
Oct. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 9.0 μg/m3 (9) 2.7 μg/m3 (12) 37.0
 
Oct. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 3.0 μg/m3 (3) 1.6 μg/m3 (7) 38.0
 
Oct. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 38.0
 
Oct. 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 8.0 μg/m3 (8) -0.9 μg/m3 (0) 37.0
 
Oct. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 19.0 μg/m3 (18) -0.7 μg/m3 (0) 38.0
 
Oct. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 4.0 μg/m3 (4) -0.3 μg/m3 (0) 38.0
 
Oct. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 2.0 μg/m3 (2) 2.9 μg/m3 (13) 37.0
 
Oct. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (12) 35.0
 
Oct. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 12.0 μg/m3 (12) 2.0 μg/m3 (9) 38.0
 
Oct. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 17.0 μg/m3 (16) 4.5 μg/m3 (19) 33.0
 
Oct. 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 21.0 μg/m3 (20) 0.0 μg/m3 (0) 37.0
 
Oct. 17, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 25.0 μg/m3 (24) 2.1 μg/m3 (9) 37.0
 
Oct. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 47.0 μg/m3 (44) 1.3 μg/m3 (6) 44.0
 
Oct. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 9.0 μg/m3 (9) 1.7 μg/m3 (8) 42.0
 
Oct. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 1.0 μg/m3 (1) 1.8 μg/m3 (8) 41.0
 
Oct. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 41.0
 
Oct. 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 6.0 μg/m3 (6) -1.3 μg/m3 (0) 41.0
 
Oct. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 8.0 μg/m3 (8) 2.3 μg/m3 (10) 40.0
 
Oct. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 12.0 μg/m3 (12) 0.7 μg/m3 (3) 39.0
 
Oct. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 7.0 μg/m3 (7) -0.6 μg/m3 (0) 38.0
 
Oct. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) -0.4 μg/m3 (0) 35.0
 
Oct. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 2.0 μg/m3 (2) 4.1 μg/m3 (18) 34.0
 
Oct. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 32.0
 
Oct. 16, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 5.0 μg/m3 (5) -1.8 μg/m3 (0) 31.0
 
Oct. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 5.0 μg/m3 (5) 6.1 μg/m3 (26) 33.0
 
Oct. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A -2.0 μg/m3 (0) 2.7 μg/m3 (12) 35.0
 
Oct. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A -1.0 μg/m3 (0) 4.0 μg/m3 (17) 35.0
 
Oct. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) 2.3 μg/m3 (10) 35.0
 
Oct. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 1.0 μg/m3 (1) -1.4 μg/m3 (0) 33.0
 
Oct. 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 7.0 μg/m3 (7) 3.0 μg/m3 (13) 34.0
 
Oct. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 6.0 μg/m3 (6) 0.2 μg/m3 (1) 33.0
 
Oct. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 6.0 μg/m3 (6) 2.3 μg/m3 (10) 33.0
 
Oct. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 8.0 μg/m3 (8) 4.5 μg/m3 (19) 34.0
 
Oct. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 9.0 μg/m3 (9) -0.8 μg/m3 (0) 36.0
 
Oct. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 14.0 μg/m3 (13) 0.9 μg/m3 (4) 34.0
 
Oct. 16, 2021, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 10.0 μg/m3 (10) 0.4 μg/m3 (2) 38.0
 
Oct. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 7.0 μg/m3 (7) -2.4 μg/m3 (0) 40.0
 
Oct. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 5.0 μg/m3 (5) 2.6 μg/m3 (11) 42.0
 
Oct. 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 0.0 μg/m3 (0) 1.9 μg/m3 (8) 42.0
 
Oct. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 3.0 μg/m3 (3) 2.1 μg/m3 (9) 41.0
 
Oct. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 2.0 μg/m3 (2) 1.9 μg/m3 (8) 40.0
 
Oct. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (15) 39.0
 
Oct. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 8.0 μg/m3 (8) 3.5 μg/m3 (15) 38.0
 
Oct. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 10.0 μg/m3 (10) 1.8 μg/m3 (8) 35.0
 
Oct. 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 8.0 μg/m3 (8) 0.1 μg/m3 (1) 33.0
 
Oct. 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 29.0
 
Oct. 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 6.0 μg/m3 (6) -0.2 μg/m3 (0) 28.0
 
Oct. 15, 2021, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 29.0
 
Oct. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.0 μg/m3 (0) 3.5 μg/m3 (15) 30.0
 
Oct. 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 5.0 μg/m3 (5) 2.5 μg/m3 (11) 28.0
 
Oct. 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 7.0 μg/m3 (7) 0.1 μg/m3 (1) 26.0
 
Oct. 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 9.0 μg/m3 (9) 3.8 μg/m3 (16) 25.0
 
Oct. 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 14.0 μg/m3 (13) 5.6 μg/m3 (24) 25.0
 
Oct. 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 7.0 μg/m3 (7) -1.5 μg/m3 (0) 27.0
 
Oct. 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) 5.7 μg/m3 (24) 27.0
 
Oct. 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 8.0 μg/m3 (8) 2.4 μg/m3 (10) 30.0
 
Oct. 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 7.0 μg/m3 (7) 1.4 μg/m3 (6) 31.0
 
Oct. 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 7.0 μg/m3 (7) 3.0 μg/m3 (13) 32.0
 
Oct. 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (5) 33.0
 
Oct. 15, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 10.0 μg/m3 (10) 0.0 μg/m3 (0) 33.0
 
Oct. 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 7.0 μg/m3 (7) 5.6 μg/m3 (24) 34.0
 
Oct. 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 9.0 μg/m3 (9) 3.5 μg/m3 (15) 34.0
 
Oct. 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 7.0 μg/m3 (7) 0.6 μg/m3 (3) 33.0
 
Oct. 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 5.0 μg/m3 (5) 2.9 μg/m3 (13) 33.0
 
Oct. 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.0 μg/m3 (0) 2.7 μg/m3 (12) 31.0
 
Oct. 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 4.0 μg/m3 (4) 0.6 μg/m3 (3) 31.0
 
Oct. 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 7.0 μg/m3 (7) 2.1 μg/m3 (9) 32.0
 
Oct. 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 11.0 μg/m3 (11) 1.4 μg/m3 (6) 31.0
 
Oct. 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 9.0 μg/m3 (9) 2.1 μg/m3 (9) 27.0
 
Oct. 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (19) 25.0
 
Oct. 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 13.0 μg/m3 (13) 4.8 μg/m3 (20) 25.0
 
Oct. 14, 2021, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 7.0 μg/m3 (7) 0.8 μg/m3 (4) 25.0
 
Oct. 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A -1.0 μg/m3 (0) 3.6 μg/m3 (16) 25.0
 
Oct. 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 2.7 μg/m3 (12) 24.0
 
Oct. 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A -2.0 μg/m3 (0) -2.7 μg/m3 (0) 26.0
 
Oct. 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 22.0 μg/m3 (21) 2.2 μg/m3 (10) 25.0
 
Oct. 14, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 14.0 μg/m3 (13) -4.9 μg/m3 (0) 25.0
 
Oct. 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 4.5 μg/m3 (19) 24.0
 
Oct. 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 0.6 μg/m3 (3) 24.0
 
Oct. 14, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 2.0 μg/m3 (2) 2.4 μg/m3 (10) 25.0
 
Oct. 14, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 27.0
 
Oct. 14, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 15.0 μg/m3 (14) 2.6 μg/m3 (11) 29.0
 
Oct. 14, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 14.0 μg/m3 (13) 1.5 μg/m3 (7) 27.0
 
Oct. 14, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 15.0 μg/m3 (14) 2.7 μg/m3 (12) 29.0
 
Oct. 13, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 9.0 μg/m3 (9) 1.6 μg/m3 (7) 33.0
 
Oct. 13, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 3.0 μg/m3 (3) -0.7 μg/m3 (0) 32.0
 
Oct. 13, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 2.0 μg/m3 (2) 3.6 μg/m3 (16) 33.0
 
Oct. 13, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (9) 32.0
 
Oct. 13, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 3.0 μg/m3 (3) -0.7 μg/m3 (0) 31.0
 
Oct. 13, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 1.5 μg/m3 (7) 31.0
 
Oct. 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A -4.1 μg/m3 (0) 28.0
 
Oct. 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A N/A 25.0
 
Oct. 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 6.0 μg/m3 (6) -1.2 μg/m3 (0) 17.0
 
Oct. 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 17.0
 
Oct. 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 0.0 μg/m3 (0) 2.5 μg/m3 (11) 12.0
 
Oct. 13, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A -2.1 μg/m3 (0) 17.0
 
Oct. 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 0.0 μg/m3 (0) 1.1 μg/m3 (5) 19.0
 
Oct. 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 5.0 μg/m3 (5) -0.1 μg/m3 (0) 18.0
 
Oct. 13, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 2.0 μg/m3 (2) 0.3 μg/m3 (2) 20.0
 
Oct. 13, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) -3.6 μg/m3 (0) 24.0
 
Oct. 13, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 1.0 μg/m3 (1) N/A 25.0
 
Oct. 13, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) 2.3 μg/m3 (10) 25.0
 
Oct. 13, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 7.0 μg/m3 (7) 0.4 μg/m3 (2) 24.0
 
Oct. 13, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A -1.0 μg/m3 (0) -1.6 μg/m3 (0) 25.0
 
Oct. 13, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 1.0 μg/m3 (1) 0.7 μg/m3 (3) 26.0
 
Oct. 13, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) 1.8 μg/m3 (8) 26.0
 
Oct. 13, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 26.0
 
Oct. 13, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 6.0 μg/m3 (6) 4.9 μg/m3 (21) 27.0
 
Oct. 12, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A -1.0 μg/m3 (0) 3.1 μg/m3 (13) 30.0
 
Oct. 12, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 30.0
 
Oct. 12, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 29.0
 
Oct. 12, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 4.0 μg/m3 (4) -2.7 μg/m3 (0) 28.0
 
Oct. 12, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A -3.0 μg/m3 (0) 0.8 μg/m3 (4) 29.0
 
Oct. 12, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 5.0 μg/m3 (5) 3.5 μg/m3 (15) 29.0
 
Oct. 12, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 8.0 μg/m3 (8) 2.5 μg/m3 (11) 29.0
 
Oct. 12, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Oct. 12, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.6 μg/m3 (7) 7.0
 
Oct. 12, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 1.0
 
Oct. 12, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 4.5 μg/m3 (19) 19.0
 
Oct. 12, 2021, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 4.0 μg/m3 (4) -1.3 μg/m3 (0) 25.0
 
Oct. 12, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 26.0
 
Oct. 12, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 27.0