ID: 2426

AQSQID: 300290049

Site Name: Columbia Falls

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

Updated: March 7, 2021, 4:31 a.m.

Location: Columbia Falls (Talbot Rd), MT

Reporting: True, Located: True

Current AQI: 14.0

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
March 7, 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) 3.2 μg/m3 (14) 14.0
 
March 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 22.0
 
March 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 5.2 μg/m3 (22) 22.0
 
March 7, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 3.7 μg/m3 (16) 16.0
 
March 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 7.2 μg/m3 (31) 31.0
 
March 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 8.4 μg/m3 (36) 36.0
 
March 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 7.7 μg/m3 (33) 33.0
 
March 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 35.0 μg/m3 (33) 17.4 μg/m3 (63) 63.0
 
March 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (20) 17.2 μg/m3 (62) 62.0
 
March 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 39.0 μg/m3 (37) 9.6 μg/m3 (40) 40.0
 
March 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 43.0 μg/m3 (40) 14.4 μg/m3 (56) 56.0
 
March 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 36.0 μg/m3 (34) 10.4 μg/m3 (44) 44.0
 
March 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (24) 11.8 μg/m3 (50) 50.0
 
March 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 23.0 μg/m3 (22) 12.0 μg/m3 (50) 50.0
 
March 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (25) 11.8 μg/m3 (50) 50.0
 
March 6, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 11.6 μg/m3 (49) 49.0
 
March 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 11.8 μg/m3 (50) 50.0
 
March 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 22.0 μg/m3 (21) 12.7 μg/m3 (53) 53.0
 
March 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (24) 16.7 μg/m3 (61) 61.0
 
March 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 56.0 μg/m3 (52) 26.0 μg/m3 (81) 81.0
 
March 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 36.0 μg/m3 (34) 23.4 μg/m3 (75) 75.0
 
March 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 52.0 μg/m3 (49) 25.8 μg/m3 (80) 80.0
 
March 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 64.0 μg/m3 (56) 26.5 μg/m3 (82) 82.0
 
March 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 135.0 μg/m3 (91) 34.9 μg/m3 (99) 99.0
 
March 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 159.0 μg/m3 (103) 37.6 μg/m3 (107) 107.0
 
March 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 40.4 μg/m3 (114) 114.0
 
March 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 82.0 μg/m3 (65) 11.3 μg/m3 (48) 65.0
 
March 6, 2021, midnight 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
 
March 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 30.0 μg/m3 (28) 8.8 μg/m3 (37) 37.0
 
March 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 47.0 μg/m3 (44) 11.0 μg/m3 (46) 46.0
 
March 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (25) 9.2 μg/m3 (39) 39.0
 
March 5, 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) 6.9 μg/m3 (29) 29.0
 
March 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 32.0 μg/m3 (30) 14.4 μg/m3 (56) 56.0
 
March 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 52.0 μg/m3 (49) 15.4 μg/m3 (58) 58.0
 
March 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 56.0 μg/m3 (52) 30.4 μg/m3 (90) 90.0
 
March 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 34.0 μg/m3 (32) 16.7 μg/m3 (61) 61.0
 
March 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 110.0 μg/m3 (79) 16.7 μg/m3 (61) 79.0
 
March 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 72.0 μg/m3 (60) 14.4 μg/m3 (56) 60.0
 
March 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 39.0 μg/m3 (37) 8.6 μg/m3 (36) 37.0
 
March 5, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 6.9 μg/m3 (29) 29.0
 
March 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (19) 15.4 μg/m3 (58) 58.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (26) 16.4 μg/m3 (61) 61.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (26) 13.2 μg/m3 (54) 54.0
 
March 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 35.0 μg/m3 (33) 12.5 μg/m3 (52) 52.0
 
March 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (24) 15.9 μg/m3 (59) 59.0
 
March 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 37.0 μg/m3 (35) 10.6 μg/m3 (45) 45.0
 
March 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 44.0 μg/m3 (41) 10.1 μg/m3 (43) 43.0
 
March 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 71.0 μg/m3 (59) 13.2 μg/m3 (54) 59.0
 
March 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 115.0 μg/m3 (81) 22.6 μg/m3 (74) 81.0
 
March 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 114.0 μg/m3 (81) 19.4 μg/m3 (67) 81.0
 
March 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 76.0 μg/m3 (62) 37.7 μg/m3 (107) 107.0
 
March 5, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 3.8 μg/m3 (16) 16.0
 
March 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 2.9 μg/m3 (13) 13.0
 
March 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (20) 3.4 μg/m3 (15) 20.0
 
March 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 2.9 μg/m3 (13) 13.0
 
March 4, 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) 2.7 μg/m3 (12) 16.0
 
March 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 18.0 μg/m3 (17) 8.4 μg/m3 (36) 36.0
 
March 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 8.6 μg/m3 (36) 36.0
 
March 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 1.7 μg/m3 (8) 8.0
 
March 4, 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) -3.1 μg/m3 (0) 4.0
 
March 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) -3.4 μg/m3 (0) 6.0
 
March 4, 2021, 2 p.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 (0) 7.0
 
March 4, 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) 0.7 μg/m3 (3) 4.0
 
March 4, 2021, noon 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
 
March 4, 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) 4.9 μg/m3 (21) 21.0
 
March 4, 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) 2.7 μg/m3 (12) 12.0
 
March 4, 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) 2.0 μg/m3 (9) 9.0
 
March 4, 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) 1.9 μg/m3 (8) 8.0
 
March 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (7) 2.9 μg/m3 (13) 13.0
 
March 4, 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) 2.9 μg/m3 (13) 13.0
 
March 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.4 μg/m3 (19) 19.0
 
March 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 18.0 μg/m3 (17) 5.7 μg/m3 (24) 24.0
 
March 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.4 μg/m3 (23) 23.0
 
March 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 109.0 μg/m3 (78) 21.4 μg/m3 (71) 78.0
 
March 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 70.0 μg/m3 (59) 7.4 μg/m3 (31) 59.0
 
March 4, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 3.7 μg/m3 (16) 16.0
 
March 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 4.2 μg/m3 (18) 18.0
 
March 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) 3.4 μg/m3 (15) 15.0
 
March 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 35.0 μg/m3 (33) 4.9 μg/m3 (21) 33.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 30.0 μg/m3 (28) 10.6 μg/m3 (45) 45.0
 
March 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 38.0 μg/m3 (36) 14.0 μg/m3 (55) 55.0
 
March 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 41.0 μg/m3 (38) 13.7 μg/m3 (55) 55.0
 
March 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 51.0 μg/m3 (48) 19.7 μg/m3 (67) 67.0
 
March 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 51.0 μg/m3 (48) 14.7 μg/m3 (57) 57.0
 
March 3, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (19) 7.4 μg/m3 (31) 31.0
 
March 3, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 6.7 μg/m3 (28) 28.0
 
March 3, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 8.2 μg/m3 (35) 35.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 9.1 μg/m3 (38) 38.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 7.7 μg/m3 (33) 33.0
 
March 3, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (20) 8.6 μg/m3 (36) 36.0
 
March 3, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 6.4 μg/m3 (27) 27.0
 
March 3, 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) 3.2 μg/m3 (14) 14.0
 
March 3, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 2.9 μg/m3 (13) 13.0
 
March 3, 2021, 4 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
 
March 3, 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) 4.4 μg/m3 (19) 19.0
 
March 3, 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) 5.4 μg/m3 (23) 23.0
 
March 3, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 4.2 μg/m3 (18) 18.0
 
March 3, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 3.4 μg/m3 (15) 15.0
 
March 2, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 10.0
 
March 2, 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) 2.2 μg/m3 (10) 11.0
 
March 2, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) 0.5 μg/m3 (3) 10.0
 
March 2, 2021, 8 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 (3) 7.0
 
March 2, 2021, 7 p.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
 
March 2, 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) 2.5 μg/m3 (11) 11.0
 
March 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 2.2 μg/m3 (10) 10.0
 
March 2, 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) 1.2 μg/m3 (5) 5.0
 
March 2, 2021, 3 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
 
March 2, 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) 1.5 μg/m3 (7) 7.0
 
March 2, 2021, 1 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
 
March 2, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 0.7 μg/m3 (3) 3.0
 
March 2, 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) 1.0 μg/m3 (5) 5.0
 
March 2, 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) 2.2 μg/m3 (10) 10.0
 
March 2, 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) 2.2 μg/m3 (10) 10.0
 
March 2, 2021, 8 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
 
March 2, 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) 2.2 μg/m3 (10) 10.0
 
March 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 2.7 μg/m3 (12) 12.0
 
March 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 3.7 μg/m3 (16) 16.0
 
March 2, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.2 μg/m3 (5) 5.0
 
March 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -0.9 μg/m3 (0) 1.0
 
March 2, 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) 1.7 μg/m3 (8) 8.0
 
March 2, 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) 3.7 μg/m3 (16) 16.0
 
March 2, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 2.5 μg/m3 (11) 11.0
 
March 1, 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) -0.4 μg/m3 (0) 2.0
 
March 1, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) -1.1 μg/m3 (0) 8.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) -0.6 μg/m3 (0) 8.0
 
March 1, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 2.7 μg/m3 (12) 12.0
 
March 1, 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) 6.2 μg/m3 (26) 26.0
 
March 1, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (8) 6.9 μg/m3 (29) 29.0
 
March 1, 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) 4.9 μg/m3 (21) 21.0
 
March 1, 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) 2.5 μg/m3 (11) 11.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 1.7 μg/m3 (8) 8.0
 
March 1, 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) 1.5 μg/m3 (7) 7.0
 
March 1, 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) 0.7 μg/m3 (3) 3.0
 
March 1, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -0.4 μg/m3 (0) 0.0
March 1, 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) 0.0 μg/m3 (0) 0.0
March 1, 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) 0.5 μg/m3 (3) 3.0
 
March 1, 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) 2.0 μg/m3 (9) 9.0
 
March 1, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 3.5 μg/m3 (15) 15.0
 
March 1, 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) 2.2 μg/m3 (10) 10.0
 
March 1, 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) 2.0 μg/m3 (9) 9.0
 
March 1, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 5.4 μg/m3 (23) 23.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 4.2 μg/m3 (18) 18.0
 
March 1, 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) 2.2 μg/m3 (10) 10.0
 
March 1, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 3.2 μg/m3 (14) 14.0
 
March 1, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 2.2 μg/m3 (10) 10.0
 
March 1, 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
 
Feb. 28, 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) 1.0 μg/m3 (5) 5.0
 
Feb. 28, 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) 1.2 μg/m3 (5) 5.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 1.5 μg/m3 (7) 7.0
 
Feb. 28, 2021, 8 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
 
Feb. 28, 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) 4.9 μg/m3 (21) 21.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 6.4 μg/m3 (27) 27.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 5.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (10) -1.6 μg/m3 (0) 10.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (9) -3.1 μg/m3 (0) 9.0
 
Feb. 28, 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) -3.1 μg/m3 (0) 3.0
 
Feb. 28, 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) 0.2 μg/m3 (1) 5.0
 
Feb. 28, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -0.4 μg/m3 (0) 5.0
 
Feb. 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -1.3 μg/m3 (0) 4.0
 
Feb. 28, 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) -1.3 μg/m3 (0) 2.0
 
Feb. 28, 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) 0.7 μg/m3 (3) 3.0
 
Feb. 28, 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) 0.7 μg/m3 (3) 3.0
 
Feb. 28, 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) -3.1 μg/m3 (0) 2.0
 
Feb. 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -2.6 μg/m3 (0) 2.0
 
Feb. 28, 2021, 5 a.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
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 2.9 μg/m3 (13) 13.0