AQSQID: 380130004

Site Name: Lostwood Nwr

Location: Burke Co, ND

Reporting: True, Located: True

Current AQI: 31.0

Burke Co ND, US: 48.641899, -102.402199

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 24, 2019, 6 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 12.0 μg/m3 (11) 7.4 μg/m3 (31) 31.0
 
July 24, 2019, 5 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 15.0 μg/m3 (14) 5.8 μg/m3 (24) 24.0
 
July 24, 2019, 4 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 15.0 μg/m3 (14) 4.0 μg/m3 (17) 25.0
 
July 24, 2019, 3 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 13.0 μg/m3 (12) 3.9 μg/m3 (16) 27.0
 
July 24, 2019, 2 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 17.0 μg/m3 (15) 4.5 μg/m3 (19) 31.0
 
July 24, 2019, 1 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) N/A 19.0 μg/m3 (17) 4.6 μg/m3 (19) 34.0
 
July 24, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 47.0 ppb (36) N/A 18.0 μg/m3 (16) 7.7 μg/m3 (32) 36.0
 
July 23, 2019, 11 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 46.0 ppb (35) N/A 19.0 μg/m3 (17) 8.7 μg/m3 (36) 36.0
 
July 23, 2019, 10 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 18.0 μg/m3 (16) 8.5 μg/m3 (35) 35.0
 
July 23, 2019, 9 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 18.0 μg/m3 (16) 11.2 μg/m3 (47) 47.0
 
July 23, 2019, 8 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 15.0 μg/m3 (14) 16.1 μg/m3 (59) 59.0
 
July 23, 2019, 7 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 14.0 μg/m3 (13) 7.9 μg/m3 (33) 35.0
 
July 23, 2019, 6 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 16.0 μg/m3 (15) 5.1 μg/m3 (21) 33.0
 
July 23, 2019, 5 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 29.0 μg/m3 (26) 4.3 μg/m3 (18) 32.0
 
July 23, 2019, 4 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (10) 5.3 μg/m3 (22) 22.0
 
July 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 6.2 μg/m3 (26) 26.0
 
July 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A N/A 22.0
 
July 23, 2019, 1 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 15.0 μg/m3 (14) 2.1 μg/m3 (9) 20.0
 
July 23, 2019, noon 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 13.0 μg/m3 (12) 3.3 μg/m3 (14) 18.0
 
July 23, 2019, 11 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 10.0 μg/m3 (9) 5.2 μg/m3 (22) 22.0
 
July 23, 2019, 10 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 11.0 μg/m3 (10) 5.5 μg/m3 (23) 23.0
 
July 23, 2019, 9 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 11.0 μg/m3 (10) 3.3 μg/m3 (14) 24.0
 
July 23, 2019, 8 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 11.0 μg/m3 (10) 4.4 μg/m3 (18) 24.0
 
July 23, 2019, 7 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 25.0
 
July 23, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 15.0 μg/m3 (14) 4.3 μg/m3 (18) 22.0
 
July 23, 2019, 5 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 14.0 μg/m3 (13) 6.1 μg/m3 (25) 25.0
 
July 23, 2019, 4 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
July 23, 2019, 3 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 15.0 μg/m3 (14) 1.5 μg/m3 (6) 27.0
 
July 23, 2019, 2 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 22.0 μg/m3 (20) 3.0 μg/m3 (12) 25.0
 
July 23, 2019, 1 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) N/A 23.0 μg/m3 (21) 7.5 μg/m3 (31) 34.0
 
July 23, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 51.0 ppb (39) N/A 18.0 μg/m3 (16) 11.9 μg/m3 (50) 50.0
 
July 22, 2019, 11 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 51.0 ppb (39) N/A 18.0 μg/m3 (16) 10.1 μg/m3 (42) 42.0
 
July 22, 2019, 10 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 51.0 ppb (39) N/A 16.0 μg/m3 (15) 9.1 μg/m3 (38) 39.0
 
July 22, 2019, 9 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 50.0 ppb (38) N/A 14.0 μg/m3 (13) 11.4 μg/m3 (48) 48.0
 
July 22, 2019, 8 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) N/A 14.0 μg/m3 (13) 7.8 μg/m3 (32) 38.0
 
July 22, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 48.0 ppb (37) N/A 14.0 μg/m3 (13) 7.3 μg/m3 (30) 37.0
 
July 22, 2019, 6 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 47.0 ppb (36) N/A 13.0 μg/m3 (12) 4.3 μg/m3 (18) 36.0
 
July 22, 2019, 5 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 45.0 ppb (35) N/A 13.0 μg/m3 (12) 6.3 μg/m3 (26) 35.0
 
July 22, 2019, 4 p.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 11.0 μg/m3 (10) 5.1 μg/m3 (21) 32.0
 
July 22, 2019, 3 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 10.0 μg/m3 (9) 7.1 μg/m3 (30) 31.0
 
July 22, 2019, 2 p.m. 5.0 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 31.0 ppb (24) N/A 12.0 μg/m3 (11) 5.8 μg/m3 (24) 24.0
 
July 22, 2019, 1 p.m. 5.4 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 19.0 ppb (15) N/A 14.0 μg/m3 (13) 4.7 μg/m3 (20) 20.0
 
July 22, 2019, noon 3.3 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 16.0 μg/m3 (15) 3.2 μg/m3 (13) 15.0
 
July 22, 2019, 11 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 9.0 μg/m3 (8) 1.7 μg/m3 (7) 12.0
 
July 22, 2019, 10 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (9) N/A 7.0 μg/m3 (6) 0.9 μg/m3 (4) 9.0
 
July 22, 2019, 9 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 12.0
 
July 22, 2019, 8 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 17.0 ppb (13) N/A 8.0 μg/m3 (7) 3.4 μg/m3 (14) 14.0
 
July 22, 2019, 7 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 15.0
 
July 22, 2019, 6 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 15.0
 
July 22, 2019, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 18.0 ppb (14) N/A 7.0 μg/m3 (6) -2.1 μg/m3 (0) 14.0
 
July 22, 2019, 4 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 9.0 μg/m3 (8) -1.8 μg/m3 (0) 16.0
 
July 22, 2019, 3 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 10.0 μg/m3 (9) -1.7 μg/m3 (0) 18.0
 
July 22, 2019, 2 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 18.0 μg/m3 (16) -0.8 μg/m3 (0) 21.0
 
July 22, 2019, 1 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 11.0 μg/m3 (10) 3.5 μg/m3 (15) 22.0
 
July 22, 2019, midnight 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 10.0 μg/m3 (9) 7.2 μg/m3 (30) 30.0
 
July 21, 2019, 11 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 10.0 μg/m3 (9) 9.7 μg/m3 (40) 40.0
 
July 21, 2019, 10 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 8.0 μg/m3 (7) 8.4 μg/m3 (35) 35.0
 
July 21, 2019, 9 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 9.0 μg/m3 (8) 2.2 μg/m3 (9) 28.0
 
July 21, 2019, 8 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 5.0 μg/m3 (5) 1.1 μg/m3 (5) 28.0
 
July 21, 2019, 7 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 7.0 μg/m3 (6) 1.7 μg/m3 (7) 25.0
 
July 21, 2019, 6 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 12.0 μg/m3 (11) 3.0 μg/m3 (12) 21.0
 
July 21, 2019, 5 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 15.0 μg/m3 (14) 4.5 μg/m3 (19) 21.0
 
July 21, 2019, 4 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 13.0 μg/m3 (12) 4.5 μg/m3 (19) 22.0
 
July 21, 2019, 3 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 11.0 μg/m3 (10) 3.2 μg/m3 (13) 20.0
 
July 21, 2019, 2 p.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 12.0 μg/m3 (11) 3.4 μg/m3 (14) 18.0
 
July 21, 2019, 1 p.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 19.0 ppb (15) N/A 13.0 μg/m3 (12) 1.7 μg/m3 (7) 15.0
 
July 21, 2019, noon 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 15.0 ppb (12) N/A 13.0 μg/m3 (12) 1.3 μg/m3 (5) 12.0
 
July 21, 2019, 11 a.m. 5.0 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 12.0 ppb (9) N/A 14.0 μg/m3 (13) 0.7 μg/m3 (3) 13.0
 
July 21, 2019, 10 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) N/A 10.0 μg/m3 (9) 0.9 μg/m3 (4) 11.0
 
July 21, 2019, 9 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 15.0 ppb (12) N/A 9.0 μg/m3 (8) -1.3 μg/m3 (0) 12.0
 
July 21, 2019, 8 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 15.0 ppb (12) N/A 6.0 μg/m3 (5) -3.1 μg/m3 (0) 12.0
 
July 21, 2019, 7 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 14.0 ppb (11) N/A 9.0 μg/m3 (8) -2.2 μg/m3 (0) 11.0
 
July 21, 2019, 6 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 8.0 μg/m3 (7) -2.8 μg/m3 (0) 12.0
 
July 21, 2019, 5 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 11.0 μg/m3 (10) N/A 12.0
 
July 21, 2019, 4 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 19.0 ppb (15) N/A 11.0 μg/m3 (10) -4.8 μg/m3 (0) 15.0
 
July 21, 2019, 3 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 20.0 ppb (15) N/A 13.0 μg/m3 (12) -3.2 μg/m3 (0) 15.0
 
July 21, 2019, 2 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 25.0 ppb (19) N/A 37.0 μg/m3 (34) -0.7 μg/m3 (0) 34.0
 
July 21, 2019, 1 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 15.0 μg/m3 (14) 0.0 μg/m3 (0) 23.0
 
July 21, 2019, midnight 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 11.0 μg/m3 (10) 0.7 μg/m3 (3) 25.0
 
July 20, 2019, 11 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 10.0 μg/m3 (9) 1.2 μg/m3 (5) 25.0
 
July 20, 2019, 10 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 9.0 μg/m3 (8) 0.6 μg/m3 (2) 25.0
 
July 20, 2019, 9 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 9.0 μg/m3 (8) 0.9 μg/m3 (4) 25.0
 
July 20, 2019, 8 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 11.0 μg/m3 (10) 0.7 μg/m3 (3) 26.0
 
July 20, 2019, 7 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 8.0 μg/m3 (7) 3.4 μg/m3 (14) 27.0
 
July 20, 2019, 6 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 7.0 μg/m3 (6) 5.8 μg/m3 (24) 27.0
 
July 20, 2019, 5 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 7.0 μg/m3 (6) 5.8 μg/m3 (24) 25.0
 
July 20, 2019, 4 p.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 3.0 ppb (4) 29.0 ppb (22) N/A 8.0 μg/m3 (7) 6.4 μg/m3 (27) 27.0
 
July 20, 2019, 3 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 3.0 ppb (4) 28.0 ppb (22) N/A 10.0 μg/m3 (9) 3.4 μg/m3 (14) 22.0
 
July 20, 2019, 2 p.m. 3.2 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 5.0 ppb (7) 27.0 ppb (21) N/A 9.0 μg/m3 (8) 4.9 μg/m3 (20) 21.0
 
July 20, 2019, 1 p.m. 9.7 ppb (9) 3.9 ppb (4) N/A 6.0 ppb (6) N/A 13.0 ppb (19) 20.0 ppb (15) N/A 9.0 μg/m3 (8) 1.0 μg/m3 (4) 19.0
 
July 20, 2019, noon 6.3 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A 6.0 ppb (9) 20.0 ppb (15) N/A 9.0 μg/m3 (8) N/A 15.0
 
July 20, 2019, 11 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 21.0 ppb (16) N/A 10.0 μg/m3 (9) N/A 16.0
 
July 20, 2019, 10 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 4.0 ppb (6) 20.0 ppb (15) N/A 10.0 μg/m3 (9) 0.0 μg/m3 (0) 15.0
 
July 20, 2019, 9 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 18.0 ppb (14) N/A 11.0 μg/m3 (10) 2.5 μg/m3 (10) 14.0
 
July 20, 2019, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 21.0 ppb (16) N/A 9.0 μg/m3 (8) 2.8 μg/m3 (12) 16.0
 
July 20, 2019, 7 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 22.0 ppb (17) N/A 11.0 μg/m3 (10) 3.5 μg/m3 (15) 17.0
 
July 20, 2019, 6 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (12) 17.0
 
July 20, 2019, 5 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 15.0 μg/m3 (14) 2.0 μg/m3 (8) 17.0
 
July 20, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 17.0 μg/m3 (15) 2.5 μg/m3 (10) 19.0
 
July 20, 2019, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 16.0 μg/m3 (15) 2.8 μg/m3 (12) 19.0
 
July 20, 2019, 2 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 16.0 μg/m3 (15) 0.2 μg/m3 (1) 19.0
 
July 20, 2019, 1 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 22.0 μg/m3 (20) 1.7 μg/m3 (7) 25.0
 
July 20, 2019, midnight 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 10.0 μg/m3 (9) 5.3 μg/m3 (22) 28.0
 
July 19, 2019, 11 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 12.0 μg/m3 (11) 4.1 μg/m3 (17) 28.0
 
July 19, 2019, 10 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 10.0 μg/m3 (9) 2.4 μg/m3 (10) 28.0
 
July 19, 2019, 9 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 10.0 μg/m3 (9) 4.6 μg/m3 (19) 28.0
 
July 19, 2019, 8 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 9.0 μg/m3 (8) 2.5 μg/m3 (10) 28.0
 
July 19, 2019, 7 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 8.0 μg/m3 (7) 1.2 μg/m3 (5) 30.0
 
July 19, 2019, 6 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 1.8 μg/m3 (8) 28.0
 
July 19, 2019, 5 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) -0.7 μg/m3 (0) 28.0
 
July 19, 2019, 4 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 8.0 μg/m3 (7) -2.5 μg/m3 (0) 28.0
 
July 19, 2019, 3 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 6.0 μg/m3 (5) -0.2 μg/m3 (0) 28.0
 
July 19, 2019, 2 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 26.0
 
July 19, 2019, 1 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 9.0 μg/m3 (8) -1.8 μg/m3 (0) 22.0
 
July 19, 2019, noon 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 19.0 ppb (15) N/A 9.0 μg/m3 (8) -0.5 μg/m3 (0) 15.0
 
July 19, 2019, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 8.0 μg/m3 (7) 2.3 μg/m3 (10) 15.0
 
July 19, 2019, 10 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 18.0 ppb (14) N/A 8.0 μg/m3 (7) 1.5 μg/m3 (6) 14.0
 
July 19, 2019, 9 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 10.0 μg/m3 (9) 0.0 μg/m3 (0) 16.0
 
July 19, 2019, 8 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 12.0 μg/m3 (11) -0.6 μg/m3 (0) 17.0
 
July 19, 2019, 7 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 13.0 μg/m3 (12) -0.6 μg/m3 (0) 16.0
 
July 19, 2019, 6 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 13.0 μg/m3 (12) 0.0 μg/m3 (0) 15.0
 
July 19, 2019, 5 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 13.0 μg/m3 (12) -0.1 μg/m3 (0) 15.0
 
July 19, 2019, 4 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 19.0 μg/m3 (17) 0.2 μg/m3 (1) 17.0
 
July 19, 2019, 3 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 18.0 μg/m3 (16) 2.1 μg/m3 (9) 17.0
 
July 19, 2019, 2 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 15.0 μg/m3 (14) 0.6 μg/m3 (2) 18.0
 
July 19, 2019, 1 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 18.0 μg/m3 (16) -1.6 μg/m3 (0) 22.0
 
July 19, 2019, midnight 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 16.0 μg/m3 (15) -1.3 μg/m3 (0) 26.0
 
July 18, 2019, 11 p.m. 0.2 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 32.0 μg/m3 (29) -0.5 μg/m3 (0) 29.0
 
July 18, 2019, 10 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 12.0 μg/m3 (11) 1.8 μg/m3 (8) 28.0
 
July 18, 2019, 9 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 13.0 μg/m3 (12) 2.0 μg/m3 (8) 27.0
 
July 18, 2019, 8 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 17.0 μg/m3 (15) 3.0 μg/m3 (12) 27.0
 
July 18, 2019, 7 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 14.0 μg/m3 (13) 3.1 μg/m3 (13) 25.0
 
July 18, 2019, 6 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 12.0 μg/m3 (11) 2.7 μg/m3 (11) 25.0
 
July 18, 2019, 5 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 14.0 μg/m3 (13) 1.3 μg/m3 (5) 25.0
 
July 18, 2019, 4 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 11.0 μg/m3 (10) 2.3 μg/m3 (10) 26.0
 
July 18, 2019, 3 p.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 10.0 μg/m3 (9) 1.1 μg/m3 (5) 26.0
 
July 18, 2019, 2 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 31.0 ppb (24) N/A 12.0 μg/m3 (11) -2.6 μg/m3 (0) 24.0
 
July 18, 2019, 1 p.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 11.0 μg/m3 (10) -0.6 μg/m3 (0) 20.0
 
July 18, 2019, noon 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 10.0 μg/m3 (9) -1.9 μg/m3 (0) 18.0
 
July 18, 2019, 11 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 8.0 μg/m3 (7) -0.6 μg/m3 (0) 17.0
 
July 18, 2019, 10 a.m. 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 8.0 μg/m3 (7) 0.5 μg/m3 (2) 15.0
 
July 18, 2019, 9 a.m. 5.3 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 17.0 ppb (13) N/A 9.0 μg/m3 (8) 0.7 μg/m3 (3) 13.0
 
July 18, 2019, 8 a.m. 4.2 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 8.0 μg/m3 (7) 2.4 μg/m3 (10) 12.0
 
July 18, 2019, 7 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 17.0 ppb (13) N/A 9.0 μg/m3 (8) 1.7 μg/m3 (7) 13.0
 
July 18, 2019, 6 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 18.0 ppb (14) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 15.0
 
July 18, 2019, 5 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 10.0 μg/m3 (9) 4.6 μg/m3 (19) 19.0
 
July 18, 2019, 4 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 11.0 μg/m3 (10) 0.7 μg/m3 (3) 23.0
 
July 18, 2019, 3 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 11.0 μg/m3 (10) 1.1 μg/m3 (5) 19.0
 
July 18, 2019, 2 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 14.0 μg/m3 (13) 2.6 μg/m3 (11) 22.0
 
July 18, 2019, 1 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 18.0 μg/m3 (16) 3.2 μg/m3 (13) 26.0
 
July 18, 2019, midnight 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 16.0 μg/m3 (15) 2.9 μg/m3 (12) 31.0
 
July 17, 2019, 11 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 12.0 μg/m3 (11) 1.0 μg/m3 (4) 32.0
 
July 17, 2019, 10 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 12.0 μg/m3 (11) 2.0 μg/m3 (8) 33.0
 
July 17, 2019, 9 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 15.0 μg/m3 (14) 2.9 μg/m3 (12) 33.0
 
July 17, 2019, 8 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 14.0 μg/m3 (13) 1.8 μg/m3 (8) 33.0
 
July 17, 2019, 7 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 44.0 ppb (34) N/A 10.0 μg/m3 (9) 1.3 μg/m3 (5) 34.0
 
July 17, 2019, 6 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 32.0
 
July 17, 2019, 5 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 10.0 μg/m3 (9) 1.7 μg/m3 (7) 32.0
 
July 17, 2019, 4 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 12.0 μg/m3 (11) 0.7 μg/m3 (3) 31.0
 
July 17, 2019, 3 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 10.0 μg/m3 (9) 2.9 μg/m3 (12) 29.0
 
July 17, 2019, 2 p.m. 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 9.0 μg/m3 (8) 0.6 μg/m3 (2) 26.0
 
July 17, 2019, 1 p.m. 3.8 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 8.0 μg/m3 (7) 0.3 μg/m3 (1) 23.0
 
July 17, 2019, noon 3.8 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 23.0 ppb (18) N/A 9.0 μg/m3 (8) -2.1 μg/m3 (0) 18.0
 
July 17, 2019, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 6.0 μg/m3 (5) -3.8 μg/m3 (0) 18.0
 
July 17, 2019, 10 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 7.0 μg/m3 (6) -0.9 μg/m3 (0) 21.0
 
July 17, 2019, 9 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 9.0 μg/m3 (8) 1.6 μg/m3 (7) 21.0
 
July 17, 2019, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 7.0 μg/m3 (6) 2.2 μg/m3 (9) 25.0
 
July 17, 2019, 7 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 6.0 μg/m3 (5) 4.1 μg/m3 (17) 28.0