AQSQID: 300270006

Site Name: Lewistown

Location: Lewistown, MT

Reporting: True, Located: True

Current AQI: 18.0

Lewistown MT, US: 47.048537, -109.455315

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A -2.0 μg/m3 (0) 2.2 μg/m3 (9) 18.0
 
May 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
May 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 2.0 μg/m3 (2) -1.5 μg/m3 (0) 20.0
 
May 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 1.0 μg/m3 (1) 4.1 μg/m3 (17) 22.0
 
May 21, 2019, 4 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) 3.1 μg/m3 (13) 23.0
 
May 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) -3.8 μg/m3 (0) 24.0
 
May 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 4.9 μg/m3 (20) 24.0
 
May 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) -2.2 μg/m3 (0) 24.0
 
May 21, 2019, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 7.0 μg/m3 (29) 29.0
 
May 20, 2019, 11 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) 0.6 μg/m3 (2) 22.0
 
May 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
May 20, 2019, 9 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) 2.5 μg/m3 (10) 22.0
 
May 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (11) 23.0
 
May 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 0.0 μg/m3 (0) -3.8 μg/m3 (0) 22.0
 
May 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 1.0 μg/m3 (1) 2.9 μg/m3 (12) 20.0
 
May 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 20.0
 
May 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 5.2 μg/m3 (22) 22.0
 
May 20, 2019, 3 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) 6.9 μg/m3 (29) 29.0
 
May 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 3.0 μg/m3 (3) 3.3 μg/m3 (14) 28.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 2.0 μg/m3 (2) 4.4 μg/m3 (18) 27.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 25.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 5.5 μg/m3 (23) 24.0
 
May 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 24.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 7.0 μg/m3 (6) 2.5 μg/m3 (10) 23.0
 
May 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 9.0 μg/m3 (8) 13.5 μg/m3 (53) 53.0
 
May 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 8.0 μg/m3 (7) 4.9 μg/m3 (20) 23.0
 
May 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 9.0 μg/m3 (8) 2.9 μg/m3 (12) 25.0
 
May 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 2.1 μg/m3 (9) 27.0
 
May 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 9.0 μg/m3 (8) 2.2 μg/m3 (9) 28.0
 
May 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 12.0 μg/m3 (11) 4.3 μg/m3 (18) 28.0
 
May 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 12.0 μg/m3 (11) 4.2 μg/m3 (18) 29.0
 
May 20, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) 4.1 μg/m3 (17) 29.0
 
May 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 12.0 μg/m3 (11) 5.4 μg/m3 (23) 29.0
 
May 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 0.7 μg/m3 (3) 30.0
 
May 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 2.5 μg/m3 (10) 31.0
 
May 19, 2019, 8 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) 2.9 μg/m3 (12) 30.0
 
May 19, 2019, 7 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) 4.0 μg/m3 (17) 29.0
 
May 19, 2019, 6 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) 8.8 μg/m3 (37) 37.0
 
May 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 1.9 μg/m3 (8) 28.0
 
May 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 11.0 μg/m3 (10) -4.4 μg/m3 (0) 28.0
 
May 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) N/A 29.0
 
May 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 5.0 μg/m3 (5) 2.6 μg/m3 (11) 28.0
 
May 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 4.8 μg/m3 (20) 26.0
 
May 19, 2019, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 0.1 μg/m3 (0) 27.0
 
May 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 5.4 μg/m3 (23) 25.0
 
May 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 25.0
 
May 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 3.0 μg/m3 (3) 4.4 μg/m3 (18) 27.0
 
May 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) 2.9 μg/m3 (12) 27.0
 
May 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) -4.7 μg/m3 (0) 25.0
 
May 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A -1.0 μg/m3 (0) 1.7 μg/m3 (7) 25.0
 
May 19, 2019, 5 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) 0.1 μg/m3 (0) 27.0
 
May 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) 2.6 μg/m3 (11) 28.0
 
May 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 0.7 μg/m3 (3) 28.0
 
May 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 0.0 μg/m3 (0) 1.0 μg/m3 (4) 30.0
 
May 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) -0.4 μg/m3 (0) 30.0
 
May 19, 2019, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A -1.0 μg/m3 (0) 6.0 μg/m3 (25) 31.0
 
May 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A -4.1 μg/m3 (0) 29.0
 
May 18, 2019, 10 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) -2.3 μg/m3 (0) 26.0
 
May 18, 2019, 9 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) 0.2 μg/m3 (1) 26.0
 
May 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) 1.4 μg/m3 (6) 25.0
 
May 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 0.0 μg/m3 (0) 3.8 μg/m3 (16) 25.0
 
May 18, 2019, 6 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) 0.7 μg/m3 (3) 25.0
 
May 18, 2019, 5 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) 3.6 μg/m3 (15) 27.0
 
May 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A -1.0 μg/m3 (0) 0.8 μg/m3 (3) 27.0
 
May 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A -2.0 μg/m3 (0) 9.2 μg/m3 (38) 38.0
 
May 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 0.0 μg/m3 (0) 5.3 μg/m3 (22) 30.0
 
May 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 0.0 μg/m3 (0) 2.8 μg/m3 (12) 29.0
 
May 18, 2019, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) -2.2 μg/m3 (0) 30.0
 
May 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) -0.5 μg/m3 (0) 28.0
 
May 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 0.0 μg/m3 (0) 3.6 μg/m3 (15) 28.0
 
May 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A -1.0 μg/m3 (0) -0.2 μg/m3 (0) 29.0
 
May 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 5.0 μg/m3 (5) N/A 29.0
 
May 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) N/A 29.0
 
May 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 3.1 μg/m3 (13) 23.0
 
May 18, 2019, 5 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) 0.2 μg/m3 (1) 22.0
 
May 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -1.0 μg/m3 (0) -0.4 μg/m3 (0) 22.0
 
May 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) 3.5 μg/m3 (15) 22.0
 
May 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 6.0 μg/m3 (5) 0.4 μg/m3 (2) 21.0
 
May 18, 2019, 1 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) -0.7 μg/m3 (0) 21.0
 
May 18, 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) 10.8 μg/m3 (45) 45.0
 
May 17, 2019, 11 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) 24.2 μg/m3 (76) 76.0
 
May 17, 2019, 10 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 (0) 25.0
 
May 17, 2019, 9 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) 3.3 μg/m3 (14) 25.0
 
May 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) -3.7 μg/m3 (0) 25.0
 
May 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 8.0 μg/m3 (7) 0.7 μg/m3 (3) 25.0
 
May 17, 2019, 6 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) 0.2 μg/m3 (1) 23.0
 
May 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 2.0 μg/m3 (2) 2.6 μg/m3 (11) 21.0
 
May 17, 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) N/A 20.0
 
May 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 0.0 μg/m3 (0) N/A 21.0
 
May 17, 2019, 2 p.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 (0) 21.0
 
May 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) -2.0 μg/m3 (0) 22.0
 
May 17, 2019, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 1.0 μg/m3 (1) 3.4 μg/m3 (14) 23.0
 
May 17, 2019, 11 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) 1.1 μg/m3 (5) 23.0
 
May 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) -3.5 μg/m3 (0) 25.0
 
May 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 10.0 μg/m3 (42) 42.0
 
May 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 15.0 μg/m3 (56) 56.0
 
May 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 29.6 μg/m3 (87) 87.0
 
May 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 6.6 μg/m3 (28) 28.0
 
May 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 12.0 μg/m3 (11) -1.6 μg/m3 (0) 25.0
 
May 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 1.5 μg/m3 (6) 25.0
 
May 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 7.2 μg/m3 (30) 30.0
 
May 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 12.0 μg/m3 (11) 8.2 μg/m3 (34) 34.0
 
May 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 5.3 μg/m3 (22) 24.0
 
May 17, 2019, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 14.0 μg/m3 (13) 11.4 μg/m3 (48) 48.0
 
May 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 16.0 μg/m3 (15) 16.2 μg/m3 (59) 59.0
 
May 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) 5.2 μg/m3 (22) 22.0
 
May 16, 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) 2.3 μg/m3 (10) 21.0
 
May 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 13.0 μg/m3 (12) 2.2 μg/m3 (9) 22.0
 
May 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 12.0 μg/m3 (11) 12.0 μg/m3 (50) 50.0
 
May 16, 2019, 6 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) 4.6 μg/m3 (19) 20.0
 
May 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 10.0 μg/m3 (9) 6.1 μg/m3 (25) 25.0
 
May 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 18.0 μg/m3 (16) 11.9 μg/m3 (50) 50.0
 
May 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 16.9 μg/m3 (60) 60.0
 
May 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 8.0 μg/m3 (7) 6.8 μg/m3 (28) 28.0
 
May 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 2.2 μg/m3 (9) 20.0
 
May 16, 2019, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 18.0 μg/m3 (16) 3.5 μg/m3 (15) 20.0
 
May 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 12.0 μg/m3 (11) 3.7 μg/m3 (15) 20.0
 
May 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 15.0 μg/m3 (14) -0.5 μg/m3 (0) 22.0
 
May 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 9.5 μg/m3 (40) 40.0
 
May 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 10.0 μg/m3 (9) 7.7 μg/m3 (32) 32.0
 
May 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 15.0 μg/m3 (14) 7.2 μg/m3 (30) 32.0
 
May 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 33.0
 
May 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 5.0 μg/m3 (5) -1.0 μg/m3 (0) 37.0
 
May 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 12.0 μg/m3 (11) 8.2 μg/m3 (34) 34.0
 
May 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 20.0 μg/m3 (18) 3.3 μg/m3 (14) 35.0
 
May 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 22.0 μg/m3 (20) 0.1 μg/m3 (0) 34.0
 
May 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 15.0 μg/m3 (14) 4.2 μg/m3 (18) 37.0
 
May 16, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 12.0 μg/m3 (11) 1.9 μg/m3 (8) 38.0
 
May 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 7.0 μg/m3 (6) -1.6 μg/m3 (0) 38.0
 
May 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 8.0 μg/m3 (7) -1.7 μg/m3 (0) 38.0
 
May 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 8.0 μg/m3 (7) 0.4 μg/m3 (2) 38.0
 
May 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 2.4 μg/m3 (10) 36.0
 
May 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 5.1 μg/m3 (21) 35.0
 
May 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 9.0 μg/m3 (8) 1.9 μg/m3 (8) 35.0
 
May 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 15.0 μg/m3 (14) 4.7 μg/m3 (20) 35.0
 
May 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 13.0 μg/m3 (12) 13.2 μg/m3 (53) 53.0
 
May 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 9.0 μg/m3 (8) 17.9 μg/m3 (63) 63.0
 
May 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 17.0 μg/m3 (15) 3.7 μg/m3 (15) 33.0
 
May 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 0.0 μg/m3 (0) 25.0
 
May 15, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 6.9 μg/m3 (29) 29.0
 
May 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 10.0 μg/m3 (9) 7.7 μg/m3 (32) 32.0
 
May 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 7.8 μg/m3 (32) 32.0
 
May 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 9.0 μg/m3 (8) 6.4 μg/m3 (27) 27.0
 
May 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 0.2 μg/m3 (1) 22.0
 
May 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 19.0 μg/m3 (17) 5.1 μg/m3 (21) 25.0
 
May 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 17.0 μg/m3 (15) -2.2 μg/m3 (0) 27.0
 
May 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) -1.9 μg/m3 (0) 29.0
 
May 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 10.0 μg/m3 (9) 2.8 μg/m3 (12) 28.0
 
May 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 16.0 μg/m3 (15) 4.3 μg/m3 (18) 30.0
 
May 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 21.0 μg/m3 (19) 2.4 μg/m3 (10) 31.0
 
May 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 13.0 μg/m3 (12) 7.3 μg/m3 (30) 30.0
 
May 15, 2019, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 13.0 μg/m3 (12) 11.2 μg/m3 (47) 47.0
 
May 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 32.0 μg/m3 (29) 5.7 μg/m3 (24) 38.0
 
May 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 18.0 μg/m3 (16) 7.5 μg/m3 (31) 35.0
 
May 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 15.0 μg/m3 (14) 12.6 μg/m3 (51) 51.0
 
May 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 51.0 μg/m3 (46) 0.0 μg/m3 (0) 46.0
 
May 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 44.0 μg/m3 (40) 5.8 μg/m3 (24) 40.0
 
May 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 38.0 μg/m3 (35) 12.8 μg/m3 (52) 52.0
 
May 14, 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) 8.2 μg/m3 (34) 34.0
 
May 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (18) 19.0 μg/m3 (65) 65.0
 
May 14, 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) 17.6 μg/m3 (62) 62.0
 
May 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 6.9 μg/m3 (29) 29.0
 
May 14, 2019, 1 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) 15.6 μg/m3 (58) 58.0
 
May 14, 2019, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 17.0 μg/m3 (15) 3.0 μg/m3 (12) 22.0
 
May 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 14.0 μg/m3 (13) -2.5 μg/m3 (0) 21.0
 
May 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 12.0 μg/m3 (11) 5.3 μg/m3 (22) 25.0
 
May 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 7.8 μg/m3 (32) 32.0