AQSQID: 490471004

Site Name: Vernal #4

Location: Uintah Co, UT

Reporting: True, Located: True

Current AQI: 35.0

Uintah Co UT, US: 40.464722, -109.56083

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 21, 2019, 2 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 1.2 μg/m3 (5) 35.0
 
May 21, 2019, 1 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 1.0 μg/m3 (4) 40.0
 
May 21, 2019, midnight 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A N/A 0.8 μg/m3 (3) 42.0
 
May 20, 2019, 11 p.m. 1.0 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 20, 2019, 10 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 1.1 μg/m3 (5) 45.0
 
May 20, 2019, 9 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 1.1 μg/m3 (5) 44.0
 
May 20, 2019, 8 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.2 μg/m3 (5) 43.0
 
May 20, 2019, 7 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 1.2 μg/m3 (5) 42.0
 
May 20, 2019, 6 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.3 μg/m3 (5) 43.0
 
May 20, 2019, 5 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.1 μg/m3 (5) 43.0
 
May 20, 2019, 4 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 1.2 μg/m3 (5) 40.0
 
May 20, 2019, 3 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 1.0 μg/m3 (4) 39.0
 
May 20, 2019, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 1.2 μg/m3 (5) 35.0
 
May 20, 2019, 1 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 1.2 μg/m3 (5) 34.0
 
May 20, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A N/A 1.2 μg/m3 (5) 32.0
 
May 20, 2019, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 0.8 μg/m3 (3) 41.0
 
May 20, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 53.0 ppb (41) N/A N/A 0.8 μg/m3 (3) 41.0
 
May 20, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 0.6 μg/m3 (2) 35.0
 
May 20, 2019, 8 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 1.3 μg/m3 (5) 29.0
 
May 20, 2019, 7 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A N/A 1.4 μg/m3 (6) 25.0
 
May 20, 2019, 6 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 2.0 μg/m3 (8) 28.0
 
May 20, 2019, 5 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 1.6 μg/m3 (7) 31.0
 
May 20, 2019, 4 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 1.7 μg/m3 (7) 34.0
 
May 20, 2019, 3 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 1.8 μg/m3 (8) 29.0
 
May 20, 2019, 2 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 2.0 μg/m3 (8) 30.0
 
May 20, 2019, 1 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 2.5 μg/m3 (10) 31.0
 
May 20, 2019, midnight 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 1.8 μg/m3 (8) 33.0
 
May 19, 2019, 11 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 1.4 μg/m3 (6) 34.0
 
May 19, 2019, 10 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 1.1 μg/m3 (5) 33.0
 
May 19, 2019, 9 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 1.3 μg/m3 (5) 33.0
 
May 19, 2019, 8 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.1 μg/m3 (5) 35.0
 
May 19, 2019, 7 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 0.9 μg/m3 (4) 32.0
 
May 19, 2019, 6 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
May 19, 2019, 5 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A N/A 0.6 μg/m3 (2) 28.0
 
May 19, 2019, 4 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) N/A N/A 0.4 μg/m3 (2) 28.0
 
May 19, 2019, 3 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) N/A N/A 0.4 μg/m3 (2) 25.0
 
May 19, 2019, 2 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) N/A N/A 0.6 μg/m3 (2) 23.0
 
May 19, 2019, 1 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) N/A N/A 0.6 μg/m3 (2) 18.0
 
May 19, 2019, noon 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) N/A N/A 0.5 μg/m3 (2) 19.0
 
May 19, 2019, 11 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A N/A 0.5 μg/m3 (2) 20.0
 
May 19, 2019, 10 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) N/A N/A 0.4 μg/m3 (2) 21.0
 
May 19, 2019, 9 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A N/A 0.4 μg/m3 (2) 20.0
 
May 19, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A N/A 0.5 μg/m3 (2) 20.0
 
May 19, 2019, 7 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A N/A 0.5 μg/m3 (2) 20.0
 
May 19, 2019, 6 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 0.6 μg/m3 (2) 22.0
 
May 19, 2019, 5 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 0.7 μg/m3 (3) 22.0
 
May 19, 2019, 4 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A N/A 1.1 μg/m3 (5) 22.0
 
May 19, 2019, 3 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A N/A 1.5 μg/m3 (6) 24.0
 
May 19, 2019, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 0.5 μg/m3 (2) 30.0
 
May 19, 2019, 1 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 0.4 μg/m3 (2) 32.0
 
May 19, 2019, midnight 1.0 ppb (1) 1.0 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, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 0.5 μg/m3 (2) 32.0
 
May 18, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 0.2 μg/m3 (1) 34.0
 
May 18, 2019, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 45.0 ppb (35) N/A N/A 0.2 μg/m3 (1) 35.0
 
May 18, 2019, 8 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 0.2 μg/m3 (1) 34.0
 
May 18, 2019, 7 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 0.5 μg/m3 (2) 34.0
 
May 18, 2019, 6 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 0.6 μg/m3 (2) 33.0
 
May 18, 2019, 5 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 0.6 μg/m3 (2) 32.0
 
May 18, 2019, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 0.7 μg/m3 (3) 31.0
 
May 18, 2019, 3 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 0.6 μg/m3 (2) 29.0
 
May 18, 2019, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A N/A 0.8 μg/m3 (3) 26.0
 
May 18, 2019, 1 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 0.8 μg/m3 (3) 22.0
 
May 18, 2019, noon 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) N/A N/A 0.8 μg/m3 (3) 19.0
 
May 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 0.6 μg/m3 (2) 20.0
 
May 18, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A N/A 0.6 μg/m3 (2) 22.0
 
May 18, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (19) N/A N/A 0.8 μg/m3 (3) 19.0
 
May 18, 2019, 8 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) N/A N/A 0.9 μg/m3 (4) 18.0
 
May 18, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A N/A 0.9 μg/m3 (4) 28.0
 
May 18, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) N/A N/A 0.8 μg/m3 (3) 29.0
 
May 18, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 1.0 μg/m3 (4) 30.0
 
May 18, 2019, 4 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A N/A 0.9 μg/m3 (4) 32.0
 
May 18, 2019, 3 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A N/A 1.6 μg/m3 (7) 32.0
 
May 18, 2019, 2 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 0.9 μg/m3 (4) 36.0
 
May 18, 2019, 1 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 1.0 μg/m3 (4) 38.0
 
May 18, 2019, midnight 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 0.6 μg/m3 (2) 41.0
 
May 17, 2019, 11 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 0.5 μg/m3 (2) 43.0
 
May 17, 2019, 10 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 0.6 μg/m3 (2) 43.0
 
May 17, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 0.7 μg/m3 (3) 43.0
 
May 17, 2019, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) N/A N/A 0.9 μg/m3 (4) 45.0
 
May 17, 2019, 7 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 59.0 ppb (45) N/A N/A 1.5 μg/m3 (6) 45.0
 
May 17, 2019, 6 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A N/A 1.5 μg/m3 (6) 45.0
 
May 17, 2019, 5 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 1.6 μg/m3 (7) 42.0
 
May 17, 2019, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 1.2 μg/m3 (5) 41.0
 
May 17, 2019, 3 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 1.7 μg/m3 (7) 37.0
 
May 17, 2019, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 1.6 μg/m3 (7) 37.0
 
May 17, 2019, 1 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A N/A 2.3 μg/m3 (10) 32.0
 
May 17, 2019, noon 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 2.3 μg/m3 (10) 30.0
 
May 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
May 17, 2019, 10 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
May 17, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 52.0 ppb (40) N/A N/A 1.0 μg/m3 (4) 40.0
 
May 17, 2019, 8 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (35) N/A N/A 1.6 μg/m3 (7) 35.0
 
May 17, 2019, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 2.9 μg/m3 (12) 38.0
 
May 17, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 2.6 μg/m3 (11) 39.0
 
May 17, 2019, 5 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 53.0 ppb (41) N/A N/A 2.4 μg/m3 (10) 41.0
 
May 17, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 2.8 μg/m3 (12) 41.0
 
May 17, 2019, 3 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) N/A N/A 3.9 μg/m3 (16) 35.0
 
May 17, 2019, 2 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
May 17, 2019, 1 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 3.3 μg/m3 (14) 40.0
 
May 17, 2019, midnight 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A N/A 2.6 μg/m3 (11) 43.0
 
May 16, 2019, 11 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 3.0 μg/m3 (12) 44.0
 
May 16, 2019, 10 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 4.2 μg/m3 (18) 44.0
 
May 16, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 3.5 μg/m3 (15) 42.0
 
May 16, 2019, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 4.7 μg/m3 (20) 43.0
 
May 16, 2019, 7 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 4.7 μg/m3 (20) 43.0
 
May 16, 2019, 6 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 3.9 μg/m3 (16) 41.0
 
May 16, 2019, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 3.9 μg/m3 (16) 41.0
 
May 16, 2019, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 4.6 μg/m3 (19) 35.0
 
May 16, 2019, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
May 16, 2019, 2 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A N/A 4.9 μg/m3 (20) 29.0
 
May 16, 2019, 1 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 4.3 μg/m3 (18) 25.0
 
May 16, 2019, noon 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A N/A 3.8 μg/m3 (16) 25.0
 
May 16, 2019, 11 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A N/A 3.4 μg/m3 (14) 25.0
 
May 16, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A N/A 3.3 μg/m3 (14) 26.0
 
May 16, 2019, 9 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A N/A 3.2 μg/m3 (13) 28.0
 
May 16, 2019, 8 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 3.2 μg/m3 (13) 28.0
 
May 16, 2019, 7 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 3.4 μg/m3 (14) 30.0
 
May 16, 2019, 6 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) N/A N/A 3.7 μg/m3 (15) 28.0
 
May 16, 2019, 5 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
May 16, 2019, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) 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. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) N/A N/A 4.4 μg/m3 (18) 25.0
 
May 16, 2019, 2 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) N/A N/A 3.9 μg/m3 (16) 36.0
 
May 16, 2019, 1 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A N/A 4.8 μg/m3 (20) 32.0
 
May 16, 2019, midnight 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
May 15, 2019, 11 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
May 15, 2019, 10 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 4.2 μg/m3 (18) 39.0
 
May 15, 2019, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 4.2 μg/m3 (18) 40.0
 
May 15, 2019, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
May 15, 2019, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A N/A 5.5 μg/m3 (23) 42.0
 
May 15, 2019, 6 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) N/A N/A 5.9 μg/m3 (25) 41.0
 
May 15, 2019, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) N/A N/A 11.0 μg/m3 (46) 46.0
 
May 15, 2019, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 8.7 μg/m3 (36) 36.0
 
May 15, 2019, 3 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 6.6 μg/m3 (28) 30.0
 
May 15, 2019, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 5.9 μg/m3 (25) 28.0
 
May 15, 2019, 1 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) N/A N/A 5.3 μg/m3 (22) 26.0
 
May 15, 2019, noon 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A N/A 5.3 μg/m3 (22) 27.0
 
May 15, 2019, 11 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A N/A 5.0 μg/m3 (21) 26.0
 
May 15, 2019, 10 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) N/A N/A 4.8 μg/m3 (20) 28.0
 
May 15, 2019, 9 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 4.8 μg/m3 (20) 28.0
 
May 15, 2019, 8 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 4.9 μg/m3 (20) 28.0
 
May 15, 2019, 7 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A N/A 5.0 μg/m3 (21) 28.0
 
May 15, 2019, 6 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 4.5 μg/m3 (19) 29.0
 
May 15, 2019, 5 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 4.3 μg/m3 (18) 30.0
 
May 15, 2019, 4 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 4.4 μg/m3 (18) 34.0
 
May 15, 2019, 3 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
May 15, 2019, 2 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (37) N/A N/A 6.1 μg/m3 (25) 37.0
 
May 15, 2019, 1 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 5.1 μg/m3 (21) 35.0
 
May 15, 2019, midnight 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 5.2 μg/m3 (22) 38.0
 
May 14, 2019, 11 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 4.7 μg/m3 (20) 42.0
 
May 14, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
May 14, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 6.2 μg/m3 (26) 43.0
 
May 14, 2019, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 8.5 μg/m3 (35) 35.0
 
May 14, 2019, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 9.4 μg/m3 (39) 39.0
 
May 14, 2019, 6 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.7 μg/m3 (32) 32.0
 
May 14, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 7.2 μg/m3 (30) 30.0
 
May 14, 2019, 4 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 14, 2019, 3 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
May 14, 2019, 2 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
May 14, 2019, 1 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.3 μg/m3 (22) 22.0
 
May 14, 2019, noon 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.3 μg/m3 (22) 22.0
 
May 14, 2019, 11 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.1 μg/m3 (21) 21.0
 
May 14, 2019, 10 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
May 14, 2019, 9 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
May 14, 2019, 8 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.4 μg/m3 (23) 23.0
 
May 14, 2019, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.3 μg/m3 (22) 22.0
 
May 14, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.8 μg/m3 (24) 24.0
 
May 14, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 5.8 μg/m3 (24) 24.0
 
May 14, 2019, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 5.6 μg/m3 (23) 23.0
 
May 14, 2019, 3 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 5.8 μg/m3 (24) 24.0