AQSQID: 300270006

Site Name: Lewistown

Location: Lewistown, MT

Reporting: True, Located: True

Current AQI: 17.0

Lewistown MT, US: 47.048537, -109.455315

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Nov. 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 2.1 μg/m3 (9) 17.0
 
Nov. 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) 0.1 μg/m3 (0) 16.0
 
Nov. 22, 2019, midnight N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 24.0 μg/m3 (22) 7.7 μg/m3 (32) 32.0
 
Nov. 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 15.0 μg/m3 (14) 7.9 μg/m3 (33) 33.0
 
Nov. 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 17.0 μg/m3 (15) 2.6 μg/m3 (11) 25.0
 
Nov. 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 13.0 μg/m3 (12) 5.2 μg/m3 (22) 26.0
 
Nov. 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 15.0 μg/m3 (14) 3.8 μg/m3 (16) 25.0
 
Nov. 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 9.0 μg/m3 (8) 0.3 μg/m3 (1) 25.0
 
Nov. 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 27.0
 
Nov. 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 9.0 μg/m3 (8) 4.9 μg/m3 (20) 23.0
 
Nov. 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A -4.0 μg/m3 (0) 2.8 μg/m3 (12) 20.0
 
Nov. 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A -3.0 μg/m3 (0) -0.5 μg/m3 (0) 22.0
 
Nov. 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 2.0 μg/m3 (2) 1.8 μg/m3 (8) 22.0
 
Nov. 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) -1.5 μg/m3 (0) 18.0
 
Nov. 21, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) 3.3 μg/m3 (14) 18.0
 
Nov. 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A -2.0 μg/m3 (0) -2.6 μg/m3 (0) 19.0
 
Nov. 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A -2.0 μg/m3 (0) 2.2 μg/m3 (9) 19.0
 
Nov. 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 20.0
 
Nov. 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 0.0 μg/m3 (0) -3.6 μg/m3 (0) 18.0
 
Nov. 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 0.0 μg/m3 (0) N/A 19.0
 
Nov. 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 0.0 μg/m3 (0) 0.8 μg/m3 (3) 16.0
 
Nov. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 1.0 μg/m3 (1) 2.8 μg/m3 (12) 18.0
 
Nov. 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 3.0 μg/m3 (3) 0.3 μg/m3 (1) 18.0
 
Nov. 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 22.0
 
Nov. 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 20.0
 
Nov. 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 4.2 μg/m3 (18) 20.0
 
Nov. 21, 2019, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 1.0 μg/m3 (1) 8.0 μg/m3 (33) 33.0
 
Nov. 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 5.0 μg/m3 (5) 19.7 μg/m3 (66) 66.0
 
Nov. 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A -2.0 μg/m3 (0) 2.2 μg/m3 (9) 25.0
 
Nov. 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 1.1 μg/m3 (5) 25.0
 
Nov. 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 2.3 μg/m3 (10) 25.0
 
Nov. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 1.0 μg/m3 (1) -0.3 μg/m3 (0) 26.0
 
Nov. 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 0.0 μg/m3 (0) 2.1 μg/m3 (9) 26.0
 
Nov. 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 28.0
 
Nov. 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 10.0 μg/m3 (42) 42.0
 
Nov. 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A -3.0 μg/m3 (0) 8.3 μg/m3 (35) 35.0
 
Nov. 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 1.0 μg/m3 (1) 1.6 μg/m3 (7) 25.0
 
Nov. 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 0.7 μg/m3 (3) 25.0
 
Nov. 20, 2019, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 0.0 μg/m3 (0) -0.1 μg/m3 (0) 24.0
 
Nov. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) 2.1 μg/m3 (9) 22.0
 
Nov. 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 18.0
 
Nov. 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 4.0 μg/m3 (4) 4.1 μg/m3 (17) 19.0
 
Nov. 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
Nov. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 5.4 μg/m3 (23) 23.0
 
Nov. 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 3.0 μg/m3 (3) 2.9 μg/m3 (12) 17.0
 
Nov. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 0.0 μg/m3 (0) 1.9 μg/m3 (8) 17.0
 
Nov. 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 16.0
 
Nov. 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 0.0 μg/m3 (0) 1.5 μg/m3 (6) 17.0
 
Nov. 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 18.0
 
Nov. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 4.0 μg/m3 (4) 3.2 μg/m3 (13) 17.0
 
Nov. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A -4.0 μg/m3 (0) 11.5 μg/m3 (48) 48.0
 
Nov. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 2.0 μg/m3 (2) 11.6 μg/m3 (48) 48.0
 
Nov. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 12.0 μg/m3 (11) 4.6 μg/m3 (19) 19.0
 
Nov. 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 1.0 μg/m3 (1) 2.2 μg/m3 (9) 21.0
 
Nov. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) 0.5 μg/m3 (2) 22.0
 
Nov. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 22.0
 
Nov. 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 13.0 μg/m3 (12) 4.0 μg/m3 (17) 20.0
 
Nov. 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) 7.9 μg/m3 (33) 33.0
 
Nov. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 10.0 μg/m3 (9) 5.9 μg/m3 (25) 25.0
 
Nov. 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 8.6 μg/m3 (36) 36.0
 
Nov. 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 3.9 μg/m3 (16) 18.0
 
Nov. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) -1.2 μg/m3 (0) 22.0
 
Nov. 19, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) 2.0 μg/m3 (8) 22.0
 
Nov. 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A -0.4 μg/m3 (0) 24.0
 
Nov. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A -1.0 μg/m3 (0) 4.5 μg/m3 (19) 23.0
 
Nov. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 4.2 μg/m3 (18) 24.0
 
Nov. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 0.0 μg/m3 (0) 9.9 μg/m3 (41) 41.0
 
Nov. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A -1.0 μg/m3 (0) 17.3 μg/m3 (61) 61.0
 
Nov. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) -1.0 μg/m3 (0) 22.0
 
Nov. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A -4.0 μg/m3 (0) 0.4 μg/m3 (2) 23.0
 
Nov. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 5.2 μg/m3 (22) 22.0
 
Nov. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) 0.9 μg/m3 (4) 20.0
 
Nov. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 23.0
 
Nov. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 10.0 μg/m3 (9) 6.5 μg/m3 (27) 27.0
 
Nov. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 3.7 μg/m3 (15) 25.0
 
Nov. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A -3.0 μg/m3 (0) -0.9 μg/m3 (0) 28.0
 
Nov. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 6.0 μg/m3 (5) 0.5 μg/m3 (2) 29.0
 
Nov. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 7.0 μg/m3 (6) -0.1 μg/m3 (0) 30.0
 
Nov. 18, 2019, 8 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) 1.3 μg/m3 (5) 32.0
 
Nov. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 32.0
 
Nov. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 3.6 μg/m3 (15) 28.0
 
Nov. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 6.8 μg/m3 (28) 28.0
 
Nov. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 9.1 μg/m3 (38) 38.0
 
Nov. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A -4.0 μg/m3 (0) 8.1 μg/m3 (34) 34.0
 
Nov. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 0.0 μg/m3 (0) 1.7 μg/m3 (7) 23.0
 
Nov. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 1.3 μg/m3 (5) 25.0
 
Nov. 18, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 0.0 μg/m3 (0) 1.5 μg/m3 (6) 26.0
 
Nov. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 2.2 μg/m3 (9) 27.0
 
Nov. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 0.5 μg/m3 (2) 27.0
 
Nov. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 2.0 μg/m3 (2) 4.0 μg/m3 (17) 27.0
 
Nov. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A -4.0 μg/m3 (0) 3.0 μg/m3 (12) 27.0
 
Nov. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A -1.0 μg/m3 (0) 2.4 μg/m3 (10) 28.0
 
Nov. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) -4.0 μg/m3 (0) 27.0
 
Nov. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A -2.0 μg/m3 (0) 0.3 μg/m3 (1) 24.0
 
Nov. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 0.4 μg/m3 (2) 22.0
 
Nov. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 3.0 μg/m3 (3) -0.1 μg/m3 (0) 22.0
 
Nov. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 4.5 μg/m3 (19) 22.0
 
Nov. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) -2.1 μg/m3 (0) 22.0
 
Nov. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 11.0 μg/m3 (10) -0.4 μg/m3 (0) 22.0
 
Nov. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 21.0 μg/m3 (19) -2.7 μg/m3 (0) 24.0
 
Nov. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 0.8 μg/m3 (3) 24.0
 
Nov. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 1.9 μg/m3 (8) 25.0
 
Nov. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A -2.0 μg/m3 (0) -1.6 μg/m3 (0) 24.0
 
Nov. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 13.0 μg/m3 (12) 4.4 μg/m3 (18) 25.0
 
Nov. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) 4.7 μg/m3 (20) 25.0
 
Nov. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 17.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
Nov. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 8.8 μg/m3 (37) 37.0
 
Nov. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 0.1 μg/m3 (0) 23.0
 
Nov. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 24.0
 
Nov. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 1.0 μg/m3 (1) -0.6 μg/m3 (0) 24.0
 
Nov. 17, 2019, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) 2.8 μg/m3 (12) 25.0
 
Nov. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) -0.1 μg/m3 (0) 27.0
 
Nov. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 1.0 μg/m3 (1) 1.2 μg/m3 (5) 27.0
 
Nov. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 0.0 μg/m3 (0) 8.4 μg/m3 (35) 35.0
 
Nov. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 4.3 μg/m3 (18) 24.0
 
Nov. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) N/A 22.0
 
Nov. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 0.0 μg/m3 (0) -1.8 μg/m3 (0) 22.0
 
Nov. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 21.0
 
Nov. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -2.0 μg/m3 (0) 0.0 μg/m3 (0) 22.0
 
Nov. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 3.4 μg/m3 (14) 22.0
 
Nov. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 0.8 μg/m3 (3) 20.0
 
Nov. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 0.0 μg/m3 (0) 6.4 μg/m3 (27) 27.0
 
Nov. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 3.1 μg/m3 (13) 17.0
 
Nov. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 0.0 μg/m3 (0) -2.7 μg/m3 (0) 23.0
 
Nov. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 25.0
 
Nov. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 25.0
 
Nov. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 1.0 μg/m3 (1) -3.9 μg/m3 (0) 25.0
 
Nov. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 0.3 μg/m3 (1) 23.0
 
Nov. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 22.0
 
Nov. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 8.9 μg/m3 (37) 37.0
 
Nov. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 10.0 μg/m3 (9) 7.1 μg/m3 (30) 30.0
 
Nov. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) -1.6 μg/m3 (0) 20.0
 
Nov. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 8.0 μg/m3 (33) 33.0
 
Nov. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) 1.9 μg/m3 (8) 23.0
 
Nov. 16, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A -1.0 μg/m3 (0) 2.4 μg/m3 (10) 21.0
 
Nov. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 3.6 μg/m3 (15) 23.0
 
Nov. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 8.0 μg/m3 (7) 1.4 μg/m3 (6) 25.0
 
Nov. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 2.0 μg/m3 (2) 4.1 μg/m3 (17) 26.0
 
Nov. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 13.3 μg/m3 (53) 53.0
 
Nov. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 19.8 μg/m3 (67) 67.0
 
Nov. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) 1.9 μg/m3 (8) 27.0
 
Nov. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 25.0
 
Nov. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) 1.7 μg/m3 (7) 25.0
 
Nov. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 3.7 μg/m3 (15) 25.0
 
Nov. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) 3.8 μg/m3 (16) 25.0
 
Nov. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 13.0 μg/m3 (12) 4.1 μg/m3 (17) 22.0
 
Nov. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 2.2 μg/m3 (9) 22.0
 
Nov. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 9.0 μg/m3 (8) 6.7 μg/m3 (28) 28.0
 
Nov. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 7.0 μg/m3 (6) 1.4 μg/m3 (6) 23.0
 
Nov. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) -0.4 μg/m3 (0) 27.0
 
Nov. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 1.0 μg/m3 (1) 5.1 μg/m3 (21) 27.0
 
Nov. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 28.0
 
Nov. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 29.0
 
Nov. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 17.0 μg/m3 (15) 3.3 μg/m3 (14) 18.0
 
Nov. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A -2.0 μg/m3 (0) 10.2 μg/m3 (42) 42.0
 
Nov. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 17.9 μg/m3 (63) 63.0
 
Nov. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 3.0 μg/m3 (3) 3.5 μg/m3 (15) 22.0
 
Nov. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 1.7 μg/m3 (7) 23.0
 
Nov. 15, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 0.0 μg/m3 (0) 2.5 μg/m3 (10) 21.0
 
Nov. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A -1.0 μg/m3 (0) 1.1 μg/m3 (5) 22.0
 
Nov. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 21.0
 
Nov. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 1.0 μg/m3 (1) 1.8 μg/m3 (8) 19.0
 
Nov. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A -1.0 μg/m3 (0) 6.4 μg/m3 (27) 27.0
 
Nov. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A -4.0 μg/m3 (0) 10.8 μg/m3 (45) 45.0
 
Nov. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 22.0
 
Nov. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 2.0 μg/m3 (2) 1.3 μg/m3 (5) 21.0
 
Nov. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 0.0 μg/m3 (0) 0.6 μg/m3 (2) 20.0
 
Nov. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 19.0