AQSQID: 300290049

Site Name: Flathead Valley

Location: Columbia Falls, MT

Reporting: True, Located: True

Current AQI: 14.0

Columbia Falls MT, US: 48.363694, -114.189272

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 1.5 μg/m3 (6) 14.0
 
May 25, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 2.0 μg/m3 (8) 12.0
 
May 25, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 27.0 μg/m3 (25) 3.7 μg/m3 (15) 25.0
 
May 25, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 4.2 μg/m3 (18) 18.0
 
May 24, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 5.2 μg/m3 (22) 22.0
 
May 24, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 5.2 μg/m3 (22) 22.0
 
May 24, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 20.0
 
May 24, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 24.0 μg/m3 (22) 2.7 μg/m3 (11) 22.0
 
May 24, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 4.5 μg/m3 (19) 19.0
 
May 24, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 3.4 μg/m3 (14) 14.0
 
May 24, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 22.0 μg/m3 (20) 3.2 μg/m3 (13) 20.0
 
May 24, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 4.7 μg/m3 (20) 20.0
 
May 24, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 3.5 μg/m3 (15) 17.0
 
May 24, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 4.4 μg/m3 (18) 18.0
 
May 24, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 2.2 μg/m3 (9) 13.0
 
May 24, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 1.7 μg/m3 (7) 12.0
 
May 24, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 3.4 μg/m3 (14) 14.0
 
May 24, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 3.5 μg/m3 (15) 15.0
 
May 24, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 1.7 μg/m3 (7) 12.0
 
May 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 2.5 μg/m3 (10) 12.0
 
May 24, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 3.7 μg/m3 (15) 15.0
 
May 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 4.2 μg/m3 (18) 18.0
 
May 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 3.4 μg/m3 (14) 14.0
 
May 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 2.2 μg/m3 (9) 12.0
 
May 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 2.7 μg/m3 (11) 15.0
 
May 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 2.2 μg/m3 (9) 19.0
 
May 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 39.0 μg/m3 (35) 2.0 μg/m3 (8) 35.0
 
May 24, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (23) 2.7 μg/m3 (11) 23.0
 
May 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 3.0 μg/m3 (12) 17.0
 
May 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 2.9 μg/m3 (12) 12.0
 
May 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 3.2 μg/m3 (13) 19.0
 
May 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 3.9 μg/m3 (16) 16.0
 
May 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (15) 3.9 μg/m3 (16) 16.0
 
May 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 32.0 μg/m3 (29) 4.2 μg/m3 (18) 29.0
 
May 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (18) 4.7 μg/m3 (20) 20.0
 
May 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 3.4 μg/m3 (14) 14.0
 
May 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 4.2 μg/m3 (18) 18.0
 
May 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 3.9 μg/m3 (16) 16.0
 
May 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 2.0 μg/m3 (8) 14.0
 
May 23, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) 2.7 μg/m3 (11) 11.0
 
May 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) 2.7 μg/m3 (11) 11.0
 
May 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) 2.2 μg/m3 (9) 9.0
 
May 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 4.9 μg/m3 (20) 20.0
 
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) 2.2 μg/m3 (9) 9.0
 
May 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (15) 1.0 μg/m3 (4) 15.0
 
May 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 3.2 μg/m3 (13) 13.0
 
May 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 3.4 μg/m3 (14) 14.0
 
May 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 1.9 μg/m3 (8) 12.0
 
May 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 2.0 μg/m3 (8) 10.0
 
May 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 20.0
 
May 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 81.0 μg/m3 (63) 5.9 μg/m3 (25) 63.0
 
May 23, 2019, midnight 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
 
May 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 3.7 μg/m3 (15) 19.0
 
May 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 3.9 μg/m3 (16) 16.0
 
May 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 2.0 μg/m3 (8) 12.0
 
May 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) -0.2 μg/m3 (0) 13.0
 
May 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) -1.2 μg/m3 (0) 11.0
 
May 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) -2.1 μg/m3 (0) 12.0
 
May 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 1.2 μg/m3 (5) 12.0
 
May 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 0.2 μg/m3 (1) 10.0
 
May 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) -2.1 μg/m3 (0) 6.0
 
May 22, 2019, 2 p.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
 
May 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -1.6 μg/m3 (0) 2.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -0.2 μg/m3 (0) 2.0
 
May 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.2 μg/m3 (1) 1.0
 
May 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -3.0 μg/m3 (0) 0.7 μg/m3 (3) 3.0
 
May 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 1.0 μg/m3 (4) 4.0
 
May 22, 2019, 8 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
 
May 22, 2019, 7 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 (0) N/A
May 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -3.0 μg/m3 (0) -1.1 μg/m3 (0) N/A
May 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) -2.6 μg/m3 (0) N/A
May 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -2.3 μg/m3 (0) 1.0
 
May 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 1.5 μg/m3 (6) 6.0
 
May 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (25) 3.4 μg/m3 (14) 25.0
 
May 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.2 μg/m3 (1) 1.0
 
May 22, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 128.0 μg/m3 (86) -2.6 μg/m3 (0) 86.0
 
May 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 70.0 μg/m3 (58) 0.5 μg/m3 (2) 58.0
 
May 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 130.0 μg/m3 (88) 1.5 μg/m3 (6) 88.0
 
May 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 55.0 μg/m3 (50) 0.0 μg/m3 (0) 50.0
 
May 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) -0.6 μg/m3 (0) 17.0
 
May 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) -2.3 μg/m3 (0) 3.0
 
May 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) -2.8 μg/m3 (0) 3.0
 
May 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) -2.6 μg/m3 (0) 5.0
 
May 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -1.8 μg/m3 (0) 2.0
 
May 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -2.3 μg/m3 (0) N/A
May 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -1.6 μg/m3 (0) 2.0
 
May 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -0.2 μg/m3 (0) 1.0
 
May 21, 2019, noon 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) N/A
May 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (18) -0.6 μg/m3 (0) 18.0
 
May 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -0.2 μg/m3 (0) 1.0
 
May 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 3.0
 
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -0.2 μg/m3 (0) N/A
May 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 1.2 μg/m3 (5) 5.0
 
May 21, 2019, 6 a.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
 
May 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 0.7 μg/m3 (3) 5.0
 
May 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 6.0
 
May 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 0.5 μg/m3 (2) 11.0
 
May 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (24) 0.2 μg/m3 (1) 24.0
 
May 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (24) 1.2 μg/m3 (5) 24.0
 
May 21, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 8.0
 
May 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 1.0 μg/m3 (4) 19.0
 
May 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 0.7 μg/m3 (3) 11.0
 
May 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 39.0 μg/m3 (35) -1.2 μg/m3 (0) 35.0
 
May 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 89.0 μg/m3 (67) -0.2 μg/m3 (0) 67.0
 
May 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 83.0 μg/m3 (64) 1.0 μg/m3 (4) 64.0
 
May 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) -2.8 μg/m3 (0) 12.0
 
May 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) -1.8 μg/m3 (0) 10.0
 
May 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) 2.2 μg/m3 (9) 9.0
 
May 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
May 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 0.5 μg/m3 (2) 6.0
 
May 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 0.2 μg/m3 (1) 6.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) -1.3 μg/m3 (0) 7.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) -0.8 μg/m3 (0) 7.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) -0.1 μg/m3 (0) 7.0
 
May 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) -1.3 μg/m3 (0) 6.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 2.9 μg/m3 (12) 12.0
 
May 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 4.4 μg/m3 (18) 18.0
 
May 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -0.8 μg/m3 (0) 5.0
 
May 20, 2019, 5 a.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 (0) 4.0
 
May 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 1.5 μg/m3 (6) 6.0
 
May 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) 1.7 μg/m3 (7) 8.0
 
May 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) 1.5 μg/m3 (6) 7.0
 
May 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) 2.2 μg/m3 (9) 9.0
 
May 20, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 0.7 μg/m3 (3) 5.0
 
May 19, 2019, 11 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 (0) 4.0
 
May 19, 2019, 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
 
May 19, 2019, 9 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 (2) 2.0
 
May 19, 2019, 8 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
 
May 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 3.0
 
May 19, 2019, 6 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 (0) N/A
May 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -2.1 μg/m3 (0) N/A
May 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 3.0
 
May 19, 2019, 3 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
 
May 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -1.8 μg/m3 (0) N/A
May 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -4.3 μg/m3 (0) N/A
May 19, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -4.3 μg/m3 (0) N/A
May 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -1.1 μg/m3 (0) N/A
May 19, 2019, 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
 
May 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 2.4 μg/m3 (10) 10.0
 
May 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -0.3 μg/m3 (0) N/A
May 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) -1.1 μg/m3 (0) N/A
May 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -0.6 μg/m3 (0) N/A
May 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -1.1 μg/m3 (0) N/A
May 19, 2019, 4 a.m. 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) N/A
May 19, 2019, 3 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 (0) N/A
May 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 0.2 μg/m3 (1) 4.0
 
May 19, 2019, 1 a.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
 
May 19, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) -1.3 μg/m3 (0) N/A
May 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -1.6 μg/m3 (0) 1.0
 
May 18, 2019, 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 (0) 3.0
 
May 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -1.1 μg/m3 (0) N/A
May 18, 2019, 8 p.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 (4) 4.0
 
May 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 4.0
 
May 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) -1.6 μg/m3 (0) 6.0
 
May 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) -0.2 μg/m3 (0) 5.0
 
May 18, 2019, 4 p.m. 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 (2) 2.0
 
May 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -1.3 μg/m3 (0) N/A
May 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) -0.6 μg/m3 (0) N/A
May 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.7 μg/m3 (7) 7.0
 
May 18, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) 1.4 μg/m3 (6) 6.0
 
May 18, 2019, 11 a.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 (0) 4.0
 
May 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 3.0
 
May 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 3.0
 
May 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (2) -0.8 μg/m3 (0) 2.0
 
May 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -0.2 μg/m3 (0) 1.0
 
May 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) -0.2 μg/m3 (0) 4.0
 
May 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 5.0
 
May 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 5.0