AQSQID: 380570004

Site Name: Beulah North

Location: Mercer Co, ND

Reporting: True, Located: True

Current AQI: 19.0

Mercer Co ND, US: 47.2986, -101.7669

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 20, 2019, 3 p.m. 8.9 ppb (8) 4.2 ppb (4) N/A 5.0 ppb (5) N/A 4.0 ppb (6) 25.0 ppb (19) N/A N/A 2.1 μg/m3 (9) 19.0
 
July 20, 2019, 2 p.m. 3.4 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 2.3 μg/m3 (10) 22.0
 
July 20, 2019, 1 p.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 1.2 μg/m3 (5) 18.0
 
July 20, 2019, noon 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 27.0 ppb (21) N/A N/A 1.2 μg/m3 (5) 21.0
 
July 20, 2019, 11 a.m. 3.8 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 1.4 μg/m3 (6) 18.0
 
July 20, 2019, 10 a.m. 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 19.0 ppb (15) N/A N/A 3.1 μg/m3 (13) 15.0
 
July 20, 2019, 9 a.m. 4.2 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 13.0 ppb (10) N/A N/A 2.4 μg/m3 (10) 10.0
 
July 20, 2019, 8 a.m. 6.9 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 2.4 μg/m3 (10) 10.0
 
July 20, 2019, 7 a.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 19.0 ppb (15) N/A N/A 2.7 μg/m3 (11) 15.0
 
July 20, 2019, 6 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 3.2 μg/m3 (13) 24.0
 
July 20, 2019, 5 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 3.4 μg/m3 (14) 24.0
 
July 20, 2019, 4 a.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 27.0 ppb (21) N/A N/A 3.2 μg/m3 (13) 21.0
 
July 20, 2019, 3 a.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 3.6 μg/m3 (15) 28.0
 
July 20, 2019, 2 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) N/A N/A 2.9 μg/m3 (12) 26.0
 
July 20, 2019, 1 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) N/A N/A 2.1 μg/m3 (9) 28.0
 
July 20, 2019, midnight 2.8 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A 1.6 μg/m3 (7) 31.0
 
July 19, 2019, 11 p.m. 2.4 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 1.3 μg/m3 (5) 33.0
 
July 19, 2019, 10 p.m. 3.1 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 0.7 μg/m3 (3) 33.0
 
July 19, 2019, 9 p.m. 4.8 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (4) 43.0 ppb (33) N/A N/A 1.6 μg/m3 (7) 33.0
 
July 19, 2019, 8 p.m. 7.2 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A 4.0 ppb (6) 42.0 ppb (32) N/A N/A 1.5 μg/m3 (6) 32.0
 
July 19, 2019, 7 p.m. 6.3 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 42.0 ppb (32) N/A N/A 2.5 μg/m3 (10) 32.0
 
July 19, 2019, 6 p.m. 3.5 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) N/A N/A 0.1 μg/m3 (0) 32.0
 
July 19, 2019, 5 p.m. 7.3 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A 3.0 ppb (4) 39.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
July 19, 2019, 4 p.m. 4.8 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) N/A N/A 2.0 μg/m3 (8) 28.0
 
July 19, 2019, 3 p.m. 10.0 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 5.0 ppb (7) 29.0 ppb (22) N/A N/A 4.0 μg/m3 (17) 22.0
 
July 19, 2019, 2 p.m. 12.5 ppb (12) 4.8 ppb (4) N/A 8.0 ppb (7) N/A 5.0 ppb (7) 18.0 ppb (14) N/A N/A 4.9 μg/m3 (20) 20.0
 
July 19, 2019, 1 p.m. 11.5 ppb (11) 4.1 ppb (4) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 15.0 ppb (12) N/A N/A 1.6 μg/m3 (7) 12.0
 
July 19, 2019, noon 9.1 ppb (8) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 15.0 ppb (12) N/A N/A 1.9 μg/m3 (8) 12.0
 
July 19, 2019, 11 a.m. 7.9 ppb (7) 1.3 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 14.0 ppb (11) N/A N/A 2.2 μg/m3 (9) 11.0
 
July 19, 2019, 10 a.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 16.0 ppb (12) N/A N/A 2.8 μg/m3 (12) 12.0
 
July 19, 2019, 9 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 17.0 ppb (13) N/A N/A 3.2 μg/m3 (13) 13.0
 
July 19, 2019, 8 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 3.3 μg/m3 (14) 16.0
 
July 19, 2019, 7 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 3.1 μg/m3 (13) 16.0
 
July 19, 2019, 6 a.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 1.9 μg/m3 (8) 16.0
 
July 19, 2019, 5 a.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 1.8 μg/m3 (8) 16.0
 
July 19, 2019, 4 a.m. 3.9 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 21.0 ppb (16) N/A N/A 2.6 μg/m3 (11) 16.0
 
July 19, 2019, 3 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 2.8 μg/m3 (12) 16.0
 
July 19, 2019, 2 a.m. 4.2 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 3.5 μg/m3 (15) 19.0
 
July 19, 2019, 1 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 3.2 μg/m3 (13) 22.0
 
July 19, 2019, midnight 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 0.9 μg/m3 (4) 23.0
 
July 18, 2019, 11 p.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A -0.4 μg/m3 (0) 24.0
 
July 18, 2019, 10 p.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 1.2 μg/m3 (5) 24.0
 
July 18, 2019, 9 p.m. 1.7 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 30.0 ppb (23) N/A N/A 1.1 μg/m3 (5) 23.0
 
July 18, 2019, 8 p.m. 1.5 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 0.0 μg/m3 (0) 24.0
 
July 18, 2019, 7 p.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 2.9 μg/m3 (12) 25.0
 
July 18, 2019, 6 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 4.5 μg/m3 (19) 27.0
 
July 18, 2019, 5 p.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 2.2 μg/m3 (9) 27.0
 
July 18, 2019, 4 p.m. 2.5 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 0.8 μg/m3 (3) 28.0
 
July 18, 2019, 3 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) N/A N/A 1.6 μg/m3 (7) 25.0
 
July 18, 2019, 2 p.m. 3.2 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) N/A N/A 1.7 μg/m3 (7) 21.0
 
July 18, 2019, 1 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 0.4 μg/m3 (2) 19.0
 
July 18, 2019, noon 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A -1.1 μg/m3 (0) 15.0
 
July 18, 2019, 11 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 0.2 μg/m3 (1) 15.0
 
July 18, 2019, 10 a.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 2.1 μg/m3 (9) 18.0
 
July 18, 2019, 9 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 1.2 μg/m3 (5) 18.0
 
July 18, 2019, 8 a.m. 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 0.4 μg/m3 (2) 18.0
 
July 18, 2019, 7 a.m. 5.1 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 1.2 μg/m3 (5) 17.0
 
July 18, 2019, 6 a.m. 5.1 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 29.0 ppb (22) N/A N/A 1.6 μg/m3 (7) 22.0
 
July 18, 2019, 5 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 36.0 ppb (28) N/A N/A 2.1 μg/m3 (9) 28.0
 
July 18, 2019, 4 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
July 18, 2019, 3 a.m. 3.8 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 2.7 μg/m3 (11) 25.0
 
July 18, 2019, 2 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 3.1 μg/m3 (13) 28.0
 
July 18, 2019, 1 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A 0.9 μg/m3 (4) 30.0
 
July 18, 2019, midnight 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A -1.0 μg/m3 (0) 27.0
 
July 17, 2019, 11 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) N/A N/A 1.2 μg/m3 (5) 32.0
 
July 17, 2019, 10 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (4) 43.0 ppb (33) N/A N/A 2.1 μg/m3 (9) 33.0
 
July 17, 2019, 9 p.m. 1.4 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) N/A N/A -1.3 μg/m3 (0) 34.0
 
July 17, 2019, 8 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) N/A N/A -2.0 μg/m3 (0) 34.0
 
July 17, 2019, 7 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 44.0 ppb (34) N/A N/A -0.3 μg/m3 (0) 34.0
 
July 17, 2019, 6 p.m. 2.9 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 1.7 μg/m3 (7) 33.0
 
July 17, 2019, 5 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) N/A N/A 1.9 μg/m3 (8) 32.0
 
July 17, 2019, 4 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A -0.1 μg/m3 (0) 30.0
 
July 17, 2019, 3 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) N/A N/A 0.1 μg/m3 (0) 26.0
 
July 17, 2019, 2 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A N/A 0.1 μg/m3 (0) 22.0
 
July 17, 2019, 1 p.m. 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 22.0 ppb (17) N/A N/A 0.3 μg/m3 (1) 17.0
 
July 17, 2019, noon 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 2.4 μg/m3 (10) 16.0
 
July 17, 2019, 11 a.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 23.0 ppb (18) N/A N/A 1.7 μg/m3 (7) 18.0
 
July 17, 2019, 10 a.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 1.8 μg/m3 (8) 18.0
 
July 17, 2019, 9 a.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 3.5 μg/m3 (15) 19.0
 
July 17, 2019, 8 a.m. 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 3.5 μg/m3 (15) 22.0
 
July 17, 2019, 7 a.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 2.0 μg/m3 (8) 22.0
 
July 17, 2019, 6 a.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 2.3 μg/m3 (10) 24.0
 
July 17, 2019, 5 a.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 3.5 μg/m3 (15) 28.0
 
July 17, 2019, 4 a.m. 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
July 17, 2019, 3 a.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) N/A N/A 2.6 μg/m3 (11) 28.0
 
July 17, 2019, 2 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 3.8 μg/m3 (16) 28.0
 
July 17, 2019, 1 a.m. 1.8 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A 4.7 μg/m3 (20) 30.0
 
July 17, 2019, midnight 4.6 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A 5.0 μg/m3 (21) 30.0
 
July 16, 2019, 11 p.m. 5.0 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 42.0 ppb (32) N/A N/A 4.5 μg/m3 (19) 32.0
 
July 16, 2019, 10 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 2.1 μg/m3 (9) 33.0
 
July 16, 2019, 9 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A 3.2 μg/m3 (13) 30.0
 
July 16, 2019, 8 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) N/A N/A 4.5 μg/m3 (19) 29.0
 
July 16, 2019, 7 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 35.0 ppb (27) N/A N/A 4.4 μg/m3 (18) 27.0
 
July 16, 2019, 6 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 5.3 μg/m3 (22) 27.0
 
July 16, 2019, 5 p.m. 3.2 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 40.0 ppb (31) N/A N/A 3.5 μg/m3 (15) 31.0
 
July 16, 2019, 4 p.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) N/A N/A 2.7 μg/m3 (11) 29.0
 
July 16, 2019, 3 p.m. 9.6 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 2.0 ppb (3) 28.0 ppb (22) N/A N/A 4.2 μg/m3 (18) 22.0
 
July 16, 2019, 2 p.m. 5.8 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 3.9 μg/m3 (16) 25.0
 
July 16, 2019, 1 p.m. 5.0 ppb (5) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 4.5 μg/m3 (19) 19.0
 
July 16, 2019, noon 9.2 ppb (9) 3.3 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 20.0 ppb (15) N/A N/A 4.2 μg/m3 (18) 18.0
 
July 16, 2019, 11 a.m. 6.8 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 23.0 ppb (18) N/A N/A 2.4 μg/m3 (10) 18.0
 
July 16, 2019, 10 a.m. 4.9 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) N/A N/A 2.8 μg/m3 (12) 23.0
 
July 16, 2019, 9 a.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 31.0 ppb (24) N/A N/A 2.7 μg/m3 (11) 24.0
 
July 16, 2019, 8 a.m. 5.3 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 0.0 μg/m3 (0) 18.0
 
July 16, 2019, 7 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 0.6 μg/m3 (2) 22.0
 
July 16, 2019, 6 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 2.5 μg/m3 (10) 27.0
 
July 16, 2019, 5 a.m. 5.6 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 37.0 ppb (28) N/A N/A 4.5 μg/m3 (19) 28.0
 
July 16, 2019, 4 a.m. 4.3 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A 5.4 μg/m3 (23) 31.0
 
July 16, 2019, 3 a.m. 5.1 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 41.0 ppb (32) N/A N/A 1.0 μg/m3 (4) 32.0
 
July 16, 2019, 2 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 1.5 μg/m3 (6) 33.0
 
July 16, 2019, 1 a.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) N/A N/A 3.8 μg/m3 (16) 38.0
 
July 16, 2019, midnight 1.4 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 56.0 ppb (43) N/A N/A 2.0 μg/m3 (8) 43.0
 
July 15, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
July 15, 2019, 10 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
 
July 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
July 15, 2019, 8 p.m. 5.6 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 3.0 ppb (4) 51.0 ppb (39) N/A N/A 0.5 μg/m3 (2) 39.0
 
July 15, 2019, 7 p.m. 3.1 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) N/A N/A 0.8 μg/m3 (3) 35.0
 
July 15, 2019, 6 p.m. 3.5 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A -1.3 μg/m3 (0) 32.0
 
July 15, 2019, 5 p.m. 2.8 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A -0.5 μg/m3 (0) 32.0
 
July 15, 2019, 4 p.m. 3.8 ppb (4) 1.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
July 15, 2019, 3 p.m. 3.9 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 3.2 μg/m3 (13) 26.0
 
July 15, 2019, 2 p.m. 2.6 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 1.5 μg/m3 (6) 22.0
 
July 15, 2019, 1 p.m. 2.6 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 1.0 μg/m3 (4) 21.0
 
July 15, 2019, noon 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 1.4 μg/m3 (6) 18.0
 
July 15, 2019, 11 a.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 1.3 μg/m3 (5) 18.0
 
July 15, 2019, 10 a.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 0.7 μg/m3 (3) 19.0
 
July 15, 2019, 9 a.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 3.2 μg/m3 (13) 22.0
 
July 15, 2019, 8 a.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 4.9 μg/m3 (20) 26.0
 
July 15, 2019, 7 a.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 1.5 μg/m3 (6) 27.0
 
July 15, 2019, 6 a.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 2.0 μg/m3 (8) 18.0
 
July 15, 2019, 5 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 3.4 μg/m3 (14) 19.0
 
July 15, 2019, 4 a.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 1.5 μg/m3 (6) 22.0
 
July 15, 2019, 3 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 0.6 μg/m3 (2) 24.0
 
July 15, 2019, 2 a.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A -0.2 μg/m3 (0) 25.0
 
July 15, 2019, 1 a.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A 0.0 μg/m3 (0) 30.0
 
July 15, 2019, midnight 3.6 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 4.0 ppb (6) 40.0 ppb (31) N/A N/A 0.1 μg/m3 (0) 31.0
 
July 14, 2019, 11 p.m. 9.1 ppb (8) 2.4 ppb (2) N/A 7.0 ppb (6) N/A 11.0 ppb (16) 36.0 ppb (28) N/A N/A -0.9 μg/m3 (0) 28.0
 
July 14, 2019, 10 p.m. 2.3 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 43.0 ppb (33) N/A N/A -0.6 μg/m3 (0) 33.0
 
July 14, 2019, 9 p.m. 1.4 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 45.0 ppb (35) N/A N/A 1.7 μg/m3 (7) 35.0
 
July 14, 2019, 8 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 3.0 ppb (4) 51.0 ppb (39) N/A N/A 2.9 μg/m3 (12) 39.0
 
July 14, 2019, 7 p.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 5.0 ppb (7) 51.0 ppb (39) N/A N/A 3.1 μg/m3 (13) 39.0
 
July 14, 2019, 6 p.m. 6.1 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A 8.0 ppb (11) 43.0 ppb (33) N/A N/A 0.3 μg/m3 (1) 33.0
 
July 14, 2019, 5 p.m. 5.8 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 7.0 ppb (10) 39.0 ppb (30) N/A N/A -1.7 μg/m3 (0) 30.0
 
July 14, 2019, 4 p.m. 3.7 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 38.0 ppb (29) N/A N/A 0.5 μg/m3 (2) 29.0
 
July 14, 2019, 3 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 2.2 μg/m3 (9) 28.0
 
July 14, 2019, 2 p.m. 1.9 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 1.2 μg/m3 (5) 25.0
 
July 14, 2019, 1 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A -1.7 μg/m3 (0) 22.0
 
July 14, 2019, noon 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 0.1 μg/m3 (0) 21.0
 
July 14, 2019, 11 a.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 2.8 μg/m3 (12) 23.0
 
July 14, 2019, 10 a.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 4.6 μg/m3 (19) 25.0
 
July 14, 2019, 9 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 6.7 μg/m3 (28) 28.0
 
July 14, 2019, 8 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 7.5 μg/m3 (31) 31.0
 
July 14, 2019, 7 a.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 14, 2019, 6 a.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 6.1 μg/m3 (25) 25.0
 
July 14, 2019, 5 a.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 7.3 μg/m3 (30) 30.0
 
July 14, 2019, 4 a.m. 3.5 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 3.6 μg/m3 (15) 17.0
 
July 14, 2019, 3 a.m. 3.5 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 2.5 μg/m3 (10) 19.0
 
July 14, 2019, 2 a.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 2.2 μg/m3 (9) 23.0
 
July 14, 2019, 1 a.m. 4.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 3.4 μg/m3 (14) 24.0
 
July 14, 2019, midnight 1.9 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 1.3 μg/m3 (5) 29.0
 
July 13, 2019, 11 p.m. 1.7 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A -1.6 μg/m3 (0) 31.0
 
July 13, 2019, 10 p.m. 1.7 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) N/A N/A -0.1 μg/m3 (0) 32.0
 
July 13, 2019, 9 p.m. 1.8 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 45.0 ppb (35) N/A N/A -1.1 μg/m3 (0) 35.0
 
July 13, 2019, 8 p.m. 1.6 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A -0.2 μg/m3 (0) 30.0
 
July 13, 2019, 7 p.m. 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 2.8 μg/m3 (12) 28.0
 
July 13, 2019, 6 p.m. 1.6 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 3.7 μg/m3 (15) 27.0
 
July 13, 2019, 5 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) N/A N/A 2.3 μg/m3 (10) 28.0
 
July 13, 2019, 4 p.m. 3.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 36.0 ppb (28) N/A N/A 3.0 μg/m3 (12) 28.0