ID: 2426

AQSQID: 300290049

Site Name: Columbia Falls

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

Updated: Sept. 22, 2021, 5:01 p.m.

Location: Columbia Falls (Talbot Rd), MT

Reporting: True, Located: True

Current AQI: 30.0

Columbia Falls (Talbot Rd) MT, US: 48.363694, -114.189272

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (19) 7.0 μg/m3 (30) 30.0
 
Sept. 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 30.0 μg/m3 (28) 7.4 μg/m3 (31) 31.0
 
Sept. 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) 4.1 μg/m3 (18) 18.0
 
Sept. 22, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 4.6 μg/m3 (20) 20.0
 
Sept. 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 3.4 μg/m3 (15) 15.0
 
Sept. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 5.2 μg/m3 (22) 22.0
 
Sept. 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 3.0 μg/m3 (13) 13.0
 
Sept. 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.2 μg/m3 (5) 6.0
 
Sept. 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 2.9 μg/m3 (13) 13.0
 
Sept. 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 4.0 μg/m3 (17) 17.0
 
Sept. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.8 μg/m3 (8) 8.0
 
Sept. 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) 0.1 μg/m3 (1) 9.0
 
Sept. 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 1.0 μg/m3 (5) 11.0
 
Sept. 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 2.8 μg/m3 (12) 12.0
 
Sept. 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 2.8 μg/m3 (12) 12.0
 
Sept. 22, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.3 μg/m3 (6) 6.0
 
Sept. 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) 1.3 μg/m3 (6) 9.0
 
Sept. 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) -1.1 μg/m3 (0) 11.0
 
Sept. 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (16) -1.1 μg/m3 (0) 16.0
 
Sept. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) -0.4 μg/m3 (0) 3.0
 
Sept. 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
Sept. 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 4.5 μg/m3 (19) 19.0
 
Sept. 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 15.0 μg/m3 (58) 58.0
 
Sept. 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 10.6 μg/m3 (45) 45.0
 
Sept. 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 6.7 μg/m3 (28) 28.0
 
Sept. 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 5.6 μg/m3 (24) 24.0
 
Sept. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 4.9 μg/m3 (21) 21.0
 
Sept. 21, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 0.7 μg/m3 (3) 3.0
 
Sept. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 2.6 μg/m3 (11) 11.0
 
Sept. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 4.9 μg/m3 (21) 21.0
 
Sept. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 3.4 μg/m3 (15) 15.0
 
Sept. 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 3.4 μg/m3 (15) 15.0
 
Sept. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 2.6 μg/m3 (11) 11.0
 
Sept. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
Sept. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 3.4 μg/m3 (15) 15.0
 
Sept. 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 3.5 μg/m3 (15) 15.0
 
Sept. 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 8.0
 
Sept. 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -0.1 μg/m3 (0) 0.0
Sept. 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 0.5 μg/m3 (3) 3.0
 
Sept. 21, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.5 μg/m3 (7) 7.0
 
Sept. 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.5 μg/m3 (3) 3.0
 
Sept. 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 1.8 μg/m3 (8) 8.0
 
Sept. 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 3.8 μg/m3 (16) 16.0
 
Sept. 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 2.3 μg/m3 (10) 10.0
 
Sept. 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 1.8 μg/m3 (8) 8.0
 
Sept. 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 9.0
 
Sept. 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 0.3 μg/m3 (2) 8.0
 
Sept. 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 4.0
 
Sept. 20, 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) 1.9 μg/m3 (8) 8.0
 
Sept. 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 1.9 μg/m3 (8) 8.0
 
Sept. 20, 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) 1.2 μg/m3 (5) 5.0
 
Sept. 20, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.2 μg/m3 (1) 1.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.5 μg/m3 (7) 7.0
 
Sept. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 1.9 μg/m3 (8) 8.0
 
Sept. 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 1.9 μg/m3 (8) 8.0
 
Sept. 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 1.5 μg/m3 (7) 7.0
 
Sept. 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.4 μg/m3 (6) 6.0
 
Sept. 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.7 μg/m3 (3) 3.0
 
Sept. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
Sept. 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.5 μg/m3 (11) 11.0
 
Sept. 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.5 μg/m3 (7) 7.0
 
Sept. 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -1.9 μg/m3 (0) 0.0
Sept. 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -1.9 μg/m3 (0) 0.0
Sept. 20, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 3.5 μg/m3 (15) 15.0
 
Sept. 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -1.1 μg/m3 (0) 2.0
 
Sept. 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) -2.1 μg/m3 (0) 0.0
Sept. 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 6.2 μg/m3 (26) 26.0
 
Sept. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 8.2 μg/m3 (35) 35.0
 
Sept. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 22.0 μg/m3 (21) 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 4.2 μg/m3 (18) 18.0
 
Sept. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 4.0
 
Sept. 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 0.4 μg/m3 (2) 2.0
 
Sept. 19, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 1.4 μg/m3 (6) 6.0
 
Sept. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.7 μg/m3 (8) 8.0
 
Sept. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.2 μg/m3 (1) 1.0
 
Sept. 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -3.3 μg/m3 (0) 0.0
Sept. 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) N/A 2.0
 
Sept. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) N/A 2.0
 
Sept. 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -3.0 μg/m3 (0) 5.0
 
Sept. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -0.1 μg/m3 (0) 0.0
Sept. 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 0.8 μg/m3 (4) 4.0
 
Sept. 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 1.3 μg/m3 (6) 6.0
 
Sept. 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 2.5 μg/m3 (11) 11.0
 
Sept. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 0.5 μg/m3 (3) 7.0
 
Sept. 19, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -0.9 μg/m3 (0) 5.0
 
Sept. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.3 μg/m3 (2) 3.0
 
Sept. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 5.5 μg/m3 (23) 23.0
 
Sept. 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 10.1 μg/m3 (43) 43.0
 
Sept. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (26) 17.3 μg/m3 (62) 62.0
 
Sept. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 33.0 μg/m3 (31) 23.6 μg/m3 (76) 76.0
 
Sept. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 54.0 μg/m3 (50) 29.0 μg/m3 (87) 87.0
 
Sept. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 14.5 μg/m3 (57) 57.0
 
Sept. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (16) 12.3 μg/m3 (52) 52.0
 
Sept. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 10.2 μg/m3 (43) 43.0
 
Sept. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 7.4 μg/m3 (31) 31.0
 
Sept. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 7.7 μg/m3 (33) 33.0
 
Sept. 18, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 9.9 μg/m3 (42) 42.0
 
Sept. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 10.1 μg/m3 (43) 43.0
 
Sept. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 8.2 μg/m3 (35) 35.0
 
Sept. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 8.5 μg/m3 (36) 36.0
 
Sept. 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 9.4 μg/m3 (40) 40.0
 
Sept. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 9.4 μg/m3 (40) 40.0
 
Sept. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 10.8 μg/m3 (46) 46.0
 
Sept. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 27.0 μg/m3 (25) 13.3 μg/m3 (54) 54.0
 
Sept. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 34.0 μg/m3 (32) 11.8 μg/m3 (50) 50.0
 
Sept. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 23.0 μg/m3 (22) 11.1 μg/m3 (47) 47.0
 
Sept. 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 24.0 μg/m3 (23) 9.4 μg/m3 (40) 40.0
 
Sept. 18, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (20) 5.5 μg/m3 (23) 23.0
 
Sept. 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (19) 5.2 μg/m3 (22) 22.0
 
Sept. 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (16) 8.2 μg/m3 (35) 35.0
 
Sept. 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (16) 21.5 μg/m3 (71) 71.0
 
Sept. 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 38.0 μg/m3 (36) 31.7 μg/m3 (93) 93.0
 
Sept. 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 47.0 μg/m3 (44) 15.0 μg/m3 (58) 58.0
 
Sept. 17, 2021, 5 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. 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.5 μg/m3 (7) 7.0
 
Sept. 17, 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) 3.6 μg/m3 (16) 16.0
 
Sept. 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 4.4 μg/m3 (19) 19.0
 
Sept. 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 4.6 μg/m3 (20) 20.0
 
Sept. 17, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 4.9 μg/m3 (21) 21.0
 
Sept. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) 1.9 μg/m3 (8) 9.0
 
Sept. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 2.4 μg/m3 (10) 10.0
 
Sept. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 4.6 μg/m3 (20) 20.0
 
Sept. 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 5.1 μg/m3 (22) 22.0
 
Sept. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 4.9 μg/m3 (21) 21.0
 
Sept. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 3.1 μg/m3 (13) 13.0
 
Sept. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -3.0 μg/m3 (0) 1.9 μg/m3 (8) 8.0
 
Sept. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 2.6 μg/m3 (11) 11.0
 
Sept. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 2.7 μg/m3 (12) 12.0
 
Sept. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.5 μg/m3 (7) 7.0
 
Sept. 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 2.0 μg/m3 (9) 9.0
 
Sept. 17, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 30.0 μg/m3 (28) 3.0 μg/m3 (13) 28.0
 
Sept. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 0.5 μg/m3 (3) 3.0
 
Sept. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 2.0 μg/m3 (9) 9.0
 
Sept. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 3.2 μg/m3 (14) 14.0
 
Sept. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.3 μg/m3 (6) 6.0
 
Sept. 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -0.3 μg/m3 (0) 4.0
 
Sept. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -0.8 μg/m3 (0) 4.0
 
Sept. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 0.3 μg/m3 (2) 4.0
 
Sept. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 2.3 μg/m3 (10) 18.0
 
Sept. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 2.5 μg/m3 (11) 11.0
 
Sept. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 6.0
 
Sept. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 1.9 μg/m3 (8) 8.0
 
Sept. 16, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
Sept. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -4.0 μg/m3 (0) 3.1 μg/m3 (13) 13.0
 
Sept. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 2.0
 
Sept. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -4.5 μg/m3 (0) 2.0
 
Sept. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) -3.3 μg/m3 (0) 3.0
 
Sept. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -2.6 μg/m3 (0) 1.0
 
Sept. 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -0.6 μg/m3 (0) 4.0
 
Sept. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) -0.3 μg/m3 (0) 6.0
 
Sept. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 1.3 μg/m3 (6) 7.0
 
Sept. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 13.0
 
Sept. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 3.0 μg/m3 (13) 13.0
 
Sept. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (16) 3.0 μg/m3 (13) 16.0
 
Sept. 16, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 0.5 μg/m3 (3) 8.0
 
Sept. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -1.6 μg/m3 (0) 5.0
 
Sept. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -2.1 μg/m3 (0) 4.0
 
Sept. 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -2.1 μg/m3 (0) 5.0
 
Sept. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 0.3 μg/m3 (2) 8.0
 
Sept. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 0.0 μg/m3 (0) 7.0
 
Sept. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) -0.7 μg/m3 (0) 7.0
 
Sept. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 2.7 μg/m3 (12) 13.0
 
Sept. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 5.9 μg/m3 (25) 25.0