AQSQID: 490130002

Site Name: Roosvelt

Location: Roosevelt, UT

Reporting: True, Located: True

Current AQI: 39.0

Roosevelt UT, US: 40.2943, -110.009

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 22, 2019, 3 a.m. 2.2 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) N/A N/A 1.2 μg/m3 (5) 39.0
 
May 22, 2019, 2 a.m. 2.6 ppb (2) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) N/A N/A 1.1 μg/m3 (5) 42.0
 
May 22, 2019, 1 a.m. 2.1 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 1.6 μg/m3 (7) 42.0
 
May 22, 2019, midnight 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 0.9 μg/m3 (4) 45.0
 
May 21, 2019, 11 p.m. 1.8 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.5 μg/m3 (6) 42.0
 
May 21, 2019, 10 p.m. 1.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 0.9 μg/m3 (4) 45.0
 
May 21, 2019, 9 p.m. 1.7 ppb (2) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) N/A N/A 1.0 μg/m3 (4) 45.0
 
May 21, 2019, 8 p.m. 1.8 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) N/A N/A 1.1 μg/m3 (5) 45.0
 
May 21, 2019, 7 p.m. 2.0 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 1.2 μg/m3 (5) 44.0
 
May 21, 2019, 6 p.m. 1.6 ppb (1) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 1.1 μg/m3 (5) 44.0
 
May 21, 2019, 5 p.m. 1.9 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A N/A 1.2 μg/m3 (5) 43.0
 
May 21, 2019, 4 p.m. 2.9 ppb (3) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) N/A N/A 1.7 μg/m3 (7) 38.0
 
May 21, 2019, 3 p.m. 3.0 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 1.6 μg/m3 (7) 36.0
 
May 21, 2019, 2 p.m. 2.8 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 1.6 μg/m3 (7) 32.0
 
May 21, 2019, 1 p.m. 7.6 ppb (7) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) N/A N/A 2.4 μg/m3 (10) 18.0
 
May 21, 2019, noon 7.4 ppb (7) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 20.0 ppb (15) N/A N/A 2.9 μg/m3 (12) 15.0
 
May 21, 2019, 11 a.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) N/A N/A 2.2 μg/m3 (9) 18.0
 
May 21, 2019, 10 a.m. 3.4 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A N/A 1.5 μg/m3 (6) 22.0
 
May 21, 2019, 9 a.m. 3.3 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A N/A 1.1 μg/m3 (5) 26.0
 
May 21, 2019, 8 a.m. 2.9 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) N/A N/A 1.5 μg/m3 (6) 22.0
 
May 21, 2019, 7 a.m. 2.9 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
May 21, 2019, 6 a.m. 2.9 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 0.9 μg/m3 (4) 30.0
 
May 21, 2019, 5 a.m. 3.6 ppb (3) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 1.7 μg/m3 (7) 25.0
 
May 21, 2019, 4 a.m. 3.5 ppb (3) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A N/A 3.3 μg/m3 (14) 28.0
 
May 21, 2019, 3 a.m. 3.0 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 1.4 μg/m3 (6) 28.0
 
May 21, 2019, 2 a.m. 2.8 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) N/A N/A 1.1 μg/m3 (5) 38.0
 
May 21, 2019, 1 a.m. 1.7 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 0.9 μg/m3 (4) 42.0
 
May 21, 2019, midnight 1.4 ppb (1) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 0.9 μg/m3 (4) 45.0
 
May 20, 2019, 11 p.m. 1.7 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) N/A N/A 1.0 μg/m3 (4) 45.0
 
May 20, 2019, 10 p.m. 1.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 60.0 ppb (46) N/A N/A 0.9 μg/m3 (4) 46.0
 
May 20, 2019, 9 p.m. 1.7 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 63.0 ppb (48) N/A N/A 0.9 μg/m3 (4) 48.0
 
May 20, 2019, 8 p.m. 1.5 ppb (1) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 62.0 ppb (48) N/A N/A 1.0 μg/m3 (4) 48.0
 
May 20, 2019, 7 p.m. 1.6 ppb (1) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 62.0 ppb (48) N/A N/A 1.0 μg/m3 (4) 48.0
 
May 20, 2019, 6 p.m. 1.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 60.0 ppb (46) N/A N/A 1.0 μg/m3 (4) 46.0
 
May 20, 2019, 5 p.m. 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 60.0 ppb (46) N/A N/A 0.8 μg/m3 (3) 46.0
 
May 20, 2019, 4 p.m. 2.1 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 1.0 μg/m3 (4) 42.0
 
May 20, 2019, 3 p.m. 3.2 ppb (3) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (41) N/A N/A 1.3 μg/m3 (5) 41.0
 
May 20, 2019, 2 p.m. 6.2 ppb (6) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) N/A N/A 1.8 μg/m3 (8) 36.0
 
May 20, 2019, 1 p.m. 5.3 ppb (5) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
May 20, 2019, noon 3.8 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) N/A N/A 1.3 μg/m3 (5) 30.0
 
May 20, 2019, 11 a.m. 3.7 ppb (3) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A N/A 1.0 μg/m3 (4) 31.0
 
May 20, 2019, 10 a.m. 2.3 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 0.9 μg/m3 (4) 37.0
 
May 20, 2019, 9 a.m. 1.8 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
May 20, 2019, 8 a.m. 1.5 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A N/A 0.7 μg/m3 (3) 42.0
 
May 20, 2019, 7 a.m. 1.4 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 59.0 ppb (45) N/A N/A 0.7 μg/m3 (3) 45.0
 
May 20, 2019, 6 a.m. 2.0 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 0.6 μg/m3 (2) 40.0
 
May 20, 2019, 5 a.m. 1.8 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) N/A N/A 0.6 μg/m3 (2) 39.0
 
May 20, 2019, 4 a.m. 2.0 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 1.2 μg/m3 (5) 38.0
 
May 20, 2019, 3 a.m. 1.8 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 1.4 μg/m3 (6) 40.0
 
May 20, 2019, 2 a.m. 2.1 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 1.6 μg/m3 (7) 36.0
 
May 20, 2019, 1 a.m. 2.0 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 1.4 μg/m3 (6) 34.0
 
May 20, 2019, midnight 1.8 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 0.9 μg/m3 (4) 34.0
 
May 19, 2019, 11 p.m. 1.8 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 0.8 μg/m3 (3) 35.0
 
May 19, 2019, 10 p.m. 1.7 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 1.0 μg/m3 (4) 36.0
 
May 19, 2019, 9 p.m. 1.5 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 0.8 μg/m3 (3) 37.0
 
May 19, 2019, 8 p.m. 1.8 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 0.7 μg/m3 (3) 36.0
 
May 19, 2019, 7 p.m. 1.9 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 0.6 μg/m3 (2) 35.0
 
May 19, 2019, 6 p.m. 1.9 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 0.5 μg/m3 (2) 34.0
 
May 19, 2019, 5 p.m. 2.3 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 0.3 μg/m3 (1) 31.0
 
May 19, 2019, 4 p.m. 2.5 ppb (2) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 0.4 μg/m3 (2) 28.0
 
May 19, 2019, 3 p.m. 3.2 ppb (3) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) N/A N/A 0.5 μg/m3 (2) 24.0
 
May 19, 2019, 2 p.m. 4.1 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) N/A N/A 0.6 μg/m3 (2) 20.0
 
May 19, 2019, 1 p.m. 4.7 ppb (4) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) N/A N/A 0.8 μg/m3 (3) 18.0
 
May 19, 2019, noon 5.6 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (13) N/A N/A 1.0 μg/m3 (4) 13.0
 
May 19, 2019, 11 a.m. 4.3 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 0.9 μg/m3 (4) 12.0
 
May 19, 2019, 10 a.m. 3.1 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) N/A N/A 1.3 μg/m3 (5) 15.0
 
May 19, 2019, 9 a.m. 2.8 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) N/A N/A 0.8 μg/m3 (3) 16.0
 
May 19, 2019, 8 a.m. 2.8 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) N/A N/A 0.7 μg/m3 (3) 15.0
 
May 19, 2019, 7 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A N/A 0.7 μg/m3 (3) 19.0
 
May 19, 2019, 6 a.m. 3.4 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 2.3 μg/m3 (10) 25.0
 
May 19, 2019, 5 a.m. 3.4 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 1.3 μg/m3 (5) 28.0
 
May 19, 2019, 4 a.m. 3.7 ppb (3) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A N/A 0.7 μg/m3 (3) 31.0
 
May 19, 2019, 3 a.m. 6.2 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) N/A N/A 1.0 μg/m3 (4) 29.0
 
May 19, 2019, 2 a.m. 2.0 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 0.9 μg/m3 (4) 33.0
 
May 19, 2019, 1 a.m. 1.4 ppb (1) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
May 19, 2019, midnight 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
May 18, 2019, 11 p.m. 1.7 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 0.5 μg/m3 (2) 2.0
 
May 18, 2019, 10 p.m. 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.2 μg/m3 (1) 1.0
 
May 18, 2019, 9 p.m. 1.3 ppb (1) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 0.3 μg/m3 (1) 1.0
 
May 18, 2019, 8 p.m. 1.5 ppb (1) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 0.3 μg/m3 (1) 33.0
 
May 18, 2019, 7 p.m. 1.6 ppb (1) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 0.4 μg/m3 (2) 34.0
 
May 18, 2019, 6 p.m. 1.5 ppb (1) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 0.3 μg/m3 (1) 33.0
 
May 18, 2019, 5 p.m. 1.2 ppb (1) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 0.1 μg/m3 (0) 32.0
 
May 18, 2019, 4 p.m. 2.0 ppb (2) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 0.2 μg/m3 (1) 31.0
 
May 18, 2019, 3 p.m. 3.0 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 0.4 μg/m3 (2) 30.0
 
May 18, 2019, 2 p.m. 3.1 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 0.5 μg/m3 (2) 28.0
 
May 18, 2019, 1 p.m. 3.3 ppb (3) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 0.7 μg/m3 (3) 25.0
 
May 18, 2019, noon 2.5 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A N/A 0.4 μg/m3 (2) 25.0
 
May 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 0.5 μg/m3 (2) 27.0
 
May 18, 2019, 10 a.m. 4.3 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 0.7 μg/m3 (3) 25.0
 
May 18, 2019, 9 a.m. 3.6 ppb (3) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) N/A N/A 0.9 μg/m3 (4) 27.0
 
May 18, 2019, 8 a.m. 2.8 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A N/A 0.7 μg/m3 (3) 27.0
 
May 18, 2019, 7 a.m. 2.1 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 0.8 μg/m3 (3) 29.0
 
May 18, 2019, 6 a.m. 2.3 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 1.0 μg/m3 (4) 29.0
 
May 18, 2019, 5 a.m. 2.5 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 0.9 μg/m3 (4) 29.0
 
May 18, 2019, 4 a.m. 2.5 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 0.8 μg/m3 (3) 32.0
 
May 18, 2019, 3 a.m. 2.0 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 0.9 μg/m3 (4) 34.0
 
May 18, 2019, 2 a.m. 1.7 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
May 18, 2019, 1 a.m. 2.1 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 1.2 μg/m3 (5) 37.0
 
May 18, 2019, midnight 1.8 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) N/A N/A 2.5 μg/m3 (10) 39.0
 
May 17, 2019, 11 p.m. 1.5 ppb (1) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 2.1 μg/m3 (9) 42.0
 
May 17, 2019, 10 p.m. 1.5 ppb (1) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 0.9 μg/m3 (4) 45.0
 
May 17, 2019, 9 p.m. 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 0.9 μg/m3 (4) 44.0
 
May 17, 2019, 8 p.m. 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 0.8 μg/m3 (3) 45.0
 
May 17, 2019, 7 p.m. 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 59.0 ppb (45) N/A N/A 0.6 μg/m3 (2) 45.0
 
May 17, 2019, 6 p.m. 1.8 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 1.4 μg/m3 (6) 46.0
 
May 17, 2019, 5 p.m. 2.7 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 1.8 μg/m3 (8) 42.0
 
May 17, 2019, 4 p.m. 2.3 ppb (2) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.9 μg/m3 (8) 42.0
 
May 17, 2019, 3 p.m. 1.9 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.8 μg/m3 (8) 42.0
 
May 17, 2019, 2 p.m. 3.4 ppb (3) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) N/A N/A 2.0 μg/m3 (8) 40.0
 
May 17, 2019, 1 p.m. 4.4 ppb (4) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) N/A N/A 1.9 μg/m3 (8) 32.0
 
May 17, 2019, noon 4.3 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A N/A 1.6 μg/m3 (7) 32.0
 
May 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 1.5 μg/m3 (6) 34.0
 
May 17, 2019, 10 a.m. 2.2 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 1.5 μg/m3 (6) 40.0
 
May 17, 2019, 9 a.m. 2.1 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) N/A N/A 1.5 μg/m3 (6) 45.0
 
May 17, 2019, 8 a.m. 1.6 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 62.0 ppb (48) N/A N/A 1.9 μg/m3 (8) 48.0
 
May 17, 2019, 7 a.m. 1.6 ppb (1) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 4.4 μg/m3 (18) 38.0
 
May 17, 2019, 6 a.m. 1.9 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 2.3 μg/m3 (10) 37.0
 
May 17, 2019, 5 a.m. 2.3 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 2.9 μg/m3 (12) 38.0
 
May 17, 2019, 4 a.m. 2.2 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 2.9 μg/m3 (12) 40.0
 
May 17, 2019, 3 a.m. 1.7 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 3.7 μg/m3 (15) 42.0
 
May 17, 2019, 2 a.m. 1.8 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 2.5 μg/m3 (10) 44.0
 
May 17, 2019, 1 a.m. 2.1 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A N/A 2.4 μg/m3 (10) 43.0
 
May 17, 2019, midnight 2.2 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A N/A 2.2 μg/m3 (9) 43.0
 
May 16, 2019, 11 p.m. 1.9 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) N/A N/A 2.5 μg/m3 (10) 45.0
 
May 16, 2019, 10 p.m. 1.8 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 61.0 ppb (47) N/A N/A 4.4 μg/m3 (18) 47.0
 
May 16, 2019, 9 p.m. 1.6 ppb (1) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 3.3 μg/m3 (14) 46.0
 
May 16, 2019, 8 p.m. 1.7 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) N/A N/A 2.9 μg/m3 (12) 45.0
 
May 16, 2019, 7 p.m. 1.4 ppb (1) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 3.2 μg/m3 (13) 45.0
 
May 16, 2019, 6 p.m. 1.7 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 3.6 μg/m3 (15) 44.0
 
May 16, 2019, 5 p.m. 2.1 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 3.9 μg/m3 (16) 42.0
 
May 16, 2019, 4 p.m. 5.1 ppb (5) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) N/A N/A 5.2 μg/m3 (22) 36.0
 
May 16, 2019, 3 p.m. 15.2 ppb (14) 6.3 ppb (6) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 16, 2019, 2 p.m. 21.5 ppb (20) 10.8 ppb (10) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) N/A N/A 9.6 μg/m3 (40) 40.0
 
May 16, 2019, 1 p.m. 8.4 ppb (8) 2.9 ppb (3) N/A 7.0 ppb (6) N/A N/A 21.0 ppb (16) N/A N/A 5.8 μg/m3 (24) 24.0
 
May 16, 2019, noon 8.7 ppb (8) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) N/A N/A 6.0 μg/m3 (25) 25.0
 
May 16, 2019, 11 a.m. 4.7 ppb (4) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) N/A N/A 4.9 μg/m3 (20) 20.0
 
May 16, 2019, 10 a.m. 5.5 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 20.0 ppb (15) N/A N/A 5.1 μg/m3 (21) 21.0
 
May 16, 2019, 9 a.m. 6.5 ppb (6) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 23.0 ppb (18) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 16, 2019, 8 a.m. 6.4 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) N/A N/A 5.0 μg/m3 (21) 21.0
 
May 16, 2019, 7 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) N/A N/A 4.2 μg/m3 (18) 19.0
 
May 16, 2019, 6 a.m. 2.9 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) N/A N/A 3.7 μg/m3 (15) 25.0
 
May 16, 2019, 5 a.m. 3.6 ppb (3) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 3.9 μg/m3 (16) 25.0
 
May 16, 2019, 4 a.m. 4.1 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
May 16, 2019, 3 a.m. 6.6 ppb (6) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 5.7 μg/m3 (24) 32.0
 
May 16, 2019, 2 a.m. 4.3 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) N/A N/A 4.1 μg/m3 (17) 39.0
 
May 16, 2019, 1 a.m. 2.1 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A N/A 3.5 μg/m3 (15) 43.0
 
May 16, 2019, midnight 2.1 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 3.4 μg/m3 (14) 42.0
 
May 15, 2019, 11 p.m. 2.1 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 3.5 μg/m3 (15) 42.0
 
May 15, 2019, 10 p.m. 2.1 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A N/A 3.8 μg/m3 (16) 43.0
 
May 15, 2019, 9 p.m. 1.8 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 3.7 μg/m3 (15) 44.0
 
May 15, 2019, 8 p.m. 1.7 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) N/A N/A 4.0 μg/m3 (17) 45.0
 
May 15, 2019, 7 p.m. 2.3 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 5.1 μg/m3 (21) 46.0
 
May 15, 2019, 6 p.m. 2.3 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 5.2 μg/m3 (22) 46.0
 
May 15, 2019, 5 p.m. 2.9 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (41) N/A N/A 5.4 μg/m3 (23) 41.0
 
May 15, 2019, 4 p.m. 3.2 ppb (3) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 5.7 μg/m3 (24) 35.0
 
May 15, 2019, 3 p.m. 6.0 ppb (6) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) N/A N/A 5.9 μg/m3 (25) 28.0
 
May 15, 2019, 2 p.m. 11.5 ppb (11) 4.5 ppb (4) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 15, 2019, 1 p.m. 9.2 ppb (9) 3.2 ppb (3) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 15, 2019, noon 5.3 ppb (5) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) N/A N/A 5.7 μg/m3 (24) 24.0
 
May 15, 2019, 11 a.m. 3.4 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 4.9 μg/m3 (20) 20.0
 
May 15, 2019, 10 a.m. 3.2 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A N/A 4.9 μg/m3 (20) 26.0
 
May 15, 2019, 9 a.m. 4.7 ppb (4) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) N/A N/A 5.6 μg/m3 (23) 23.0
 
May 15, 2019, 8 a.m. 4.6 ppb (4) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
May 15, 2019, 7 a.m. 2.9 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 5.4 μg/m3 (23) 32.0
 
May 15, 2019, 6 a.m. 3.2 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 4.7 μg/m3 (20) 28.0
 
May 15, 2019, 5 a.m. 4.0 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A N/A 4.7 μg/m3 (20) 32.0
 
May 15, 2019, 4 a.m. 4.1 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) N/A N/A 4.5 μg/m3 (19) 34.0