AQSQID: 381050003

Site Name: Williston

Location: Williston, ND

Reporting: True, Located: True

Current AQI: 29.0

Williston ND, US: 48.152822, -103.639583

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) -1.7 μg/m3 (0) 29.0
 
July 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) -0.7 μg/m3 (0) 27.0
 
July 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 12.0 μg/m3 (11) -0.9 μg/m3 (0) 24.0
 
July 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 10.0 μg/m3 (9) -0.3 μg/m3 (0) 19.0
 
July 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) -1.8 μg/m3 (0) 18.0
 
July 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) -2.1 μg/m3 (0) 18.0
 
July 17, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 4.0 μg/m3 (4) -1.9 μg/m3 (0) 21.0
 
July 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) 0.5 μg/m3 (2) 18.0
 
July 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) 1.9 μg/m3 (8) 18.0
 
July 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 25.0
 
July 17, 2019, 8 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) 0.4 μg/m3 (2) 23.0
 
July 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 25.0
 
July 17, 2019, 6 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) 0.2 μg/m3 (1) 24.0
 
July 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 24.0
 
July 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 4.5 μg/m3 (19) 27.0
 
July 17, 2019, 3 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) 2.2 μg/m3 (9) 28.0
 
July 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 6.0 μg/m3 (5) 0.3 μg/m3 (1) 32.0
 
July 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 6.0 μg/m3 (5) 0.7 μg/m3 (3) 33.0
 
July 17, 2019, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 3.5 μg/m3 (15) 36.0
 
July 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 8.0 μg/m3 (7) 1.2 μg/m3 (5) 39.0
 
July 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 39.0
 
July 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 35.0
 
July 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 6.0 μg/m3 (5) 1.8 μg/m3 (8) 33.0
 
July 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 2.1 μg/m3 (9) 32.0
 
July 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 6.0 μg/m3 (5) 1.5 μg/m3 (6) 31.0
 
July 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 10.0 μg/m3 (9) 1.3 μg/m3 (5) 25.0
 
July 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 12.0 μg/m3 (11) 4.4 μg/m3 (18) 24.0
 
July 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 7.7 μg/m3 (32) 32.0
 
July 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 16.0 μg/m3 (15) 10.5 μg/m3 (44) 44.0
 
July 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 15.0 μg/m3 (14) 10.1 μg/m3 (42) 42.0
 
July 16, 2019, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 14.0 μg/m3 (13) N/A 13.0
 
July 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.0 μg/m3 (10) N/A 10.0
 
July 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A 10.0 μg/m3 (9) 6.5 μg/m3 (27) 27.0
 
July 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A 10.0 μg/m3 (9) 5.2 μg/m3 (22) 22.0
 
July 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 10.0 μg/m3 (9) 5.3 μg/m3 (22) 22.0
 
July 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
July 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 12.0 μg/m3 (11) 7.1 μg/m3 (30) 30.0
 
July 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 12.0 μg/m3 (11) 6.2 μg/m3 (26) 26.0
 
July 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 15.0 μg/m3 (14) 2.8 μg/m3 (12) 16.0
 
July 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 14.0 μg/m3 (13) 3.4 μg/m3 (14) 23.0
 
July 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 13.0 μg/m3 (12) 3.2 μg/m3 (13) 27.0
 
July 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 11.0 μg/m3 (10) 4.3 μg/m3 (18) 34.0
 
July 16, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 2.4 μg/m3 (10) 37.0
 
July 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 9.0 μg/m3 (8) 0.0 μg/m3 (0) 38.0
 
July 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 7.0 μg/m3 (6) -1.5 μg/m3 (0) 41.0
 
July 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 38.0
 
July 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 5.0 μg/m3 (5) 0.4 μg/m3 (2) 38.0
 
July 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) -0.5 μg/m3 (0) 38.0
 
July 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 35.0
 
July 15, 2019, 5 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) 1.1 μg/m3 (5) 30.0
 
July 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 8.0 μg/m3 (7) 1.6 μg/m3 (7) 25.0
 
July 15, 2019, 3 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) 1.6 μg/m3 (7) 23.0
 
July 15, 2019, 2 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) 1.5 μg/m3 (6) 22.0
 
July 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 1.6 μg/m3 (7) 20.0
 
July 15, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 2.9 μg/m3 (12) 21.0
 
July 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 7.0 μg/m3 (6) 1.6 μg/m3 (7) 19.0
 
July 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 5.0 μg/m3 (5) 0.1 μg/m3 (0) 22.0
 
July 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 1.2 μg/m3 (5) 22.0
 
July 15, 2019, 8 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) 0.3 μg/m3 (1) 25.0
 
July 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
July 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 28.0
 
July 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 14.0 μg/m3 (13) -0.3 μg/m3 (0) 18.0
 
July 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 7.0 μg/m3 (6) 0.7 μg/m3 (3) 8.0
 
July 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 13.0 μg/m3 (12) -0.2 μg/m3 (0) 13.0
 
July 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) -2.6 μg/m3 (0) 21.0
 
July 15, 2019, 1 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) -2.7 μg/m3 (0) 25.0
 
July 15, 2019, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) -0.2 μg/m3 (0) 25.0
 
July 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 8.0 μg/m3 (7) 0.2 μg/m3 (1) 28.0
 
July 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) -3.7 μg/m3 (0) 29.0
 
July 14, 2019, 9 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) -3.5 μg/m3 (0) 30.0
 
July 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) -1.5 μg/m3 (0) 29.0
 
July 14, 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) -2.0 μg/m3 (0) 29.0
 
July 14, 2019, 6 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) -1.5 μg/m3 (0) 28.0
 
July 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) -2.4 μg/m3 (0) 26.0
 
July 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) -1.3 μg/m3 (0) 24.0
 
July 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) -0.4 μg/m3 (0) 22.0
 
July 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) -1.7 μg/m3 (0) 18.0
 
July 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 0.7 μg/m3 (3) 15.0
 
July 14, 2019, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 14.0
 
July 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 5.0 μg/m3 (5) 0.9 μg/m3 (4) 15.0
 
July 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 14.0
 
July 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 7.0 μg/m3 (6) -2.3 μg/m3 (0) 16.0
 
July 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) -0.8 μg/m3 (0) 16.0
 
July 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 2.5 μg/m3 (10) 18.0
 
July 14, 2019, 6 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) 4.0 μg/m3 (17) 21.0
 
July 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 11.0 μg/m3 (10) 4.4 μg/m3 (18) 22.0
 
July 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 3.6 μg/m3 (15) 22.0
 
July 14, 2019, 3 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) 2.4 μg/m3 (10) 22.0
 
July 14, 2019, 2 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) 0.0 μg/m3 (0) 25.0
 
July 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 12.0 μg/m3 (11) -3.1 μg/m3 (0) 28.0
 
July 14, 2019, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) -0.7 μg/m3 (0) 31.0
 
July 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 7.0 μg/m3 (6) 0.1 μg/m3 (0) 31.0
 
July 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 8.0 μg/m3 (7) -1.0 μg/m3 (0) 30.0
 
July 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 11.0 μg/m3 (10) -0.5 μg/m3 (0) 29.0
 
July 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 9.0 μg/m3 (8) 0.1 μg/m3 (0) 28.0
 
July 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 11.0 μg/m3 (10) 0.5 μg/m3 (2) 28.0
 
July 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 13.0 μg/m3 (12) 0.4 μg/m3 (2) 27.0
 
July 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 9.0 μg/m3 (8) 0.0 μg/m3 (0) 26.0
 
July 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 11.0 μg/m3 (10) 1.4 μg/m3 (6) 25.0
 
July 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 9.0 μg/m3 (8) 2.1 μg/m3 (9) 19.0
 
July 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 10.0 μg/m3 (9) 1.0 μg/m3 (4) 15.0
 
July 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 9.0 μg/m3 (8) 1.7 μg/m3 (7) 8.0
 
July 13, 2019, noon N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 8.0
 
July 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 7.0 μg/m3 (6) 2.2 μg/m3 (9) 9.0
 
July 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 14.0
 
July 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A 7.0 μg/m3 (6) 2.8 μg/m3 (12) 12.0
 
July 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 6.0 μg/m3 (5) 0.3 μg/m3 (1) 5.0
 
July 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 6.0 μg/m3 (5) -1.6 μg/m3 (0) 8.0
 
July 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 2.3 μg/m3 (10) 18.0
 
July 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
July 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) 1.7 μg/m3 (7) 16.0
 
July 13, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 19.0
 
July 13, 2019, 2 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) 2.9 μg/m3 (12) 24.0
 
July 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 17.0 μg/m3 (15) 2.3 μg/m3 (10) 30.0
 
July 13, 2019, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 3.1 μg/m3 (13) 34.0
 
July 12, 2019, 11 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) 1.6 μg/m3 (7) 35.0
 
July 12, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 9.0 μg/m3 (8) 1.0 μg/m3 (4) 39.0
 
July 12, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 11.0 μg/m3 (10) 0.4 μg/m3 (2) 41.0
 
July 12, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 10.0 μg/m3 (9) -0.1 μg/m3 (0) 38.0
 
July 12, 2019, 7 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) 1.6 μg/m3 (7) 34.0
 
July 12, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 11.0 μg/m3 (10) 1.1 μg/m3 (5) 35.0
 
July 12, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 9.0 μg/m3 (8) 1.7 μg/m3 (7) 32.0
 
July 12, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 12.0 μg/m3 (11) 2.2 μg/m3 (9) 27.0
 
July 12, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 13.0 μg/m3 (12) 2.1 μg/m3 (9) 20.0
 
July 12, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 12.0 μg/m3 (11) 2.0 μg/m3 (8) 16.0
 
July 12, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 12.0 μg/m3 (11) 0.1 μg/m3 (0) 11.0
 
July 12, 2019, noon N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 10.0 μg/m3 (9) 0.5 μg/m3 (2) 9.0
 
July 12, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 8.0
 
July 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 7.0 μg/m3 (6) 2.3 μg/m3 (10) 10.0
 
July 12, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 10.0
 
July 12, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 6.0 μg/m3 (5) -0.1 μg/m3 (0) 10.0
 
July 12, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) -0.9 μg/m3 (0) 14.0
 
July 12, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 12.0
 
July 12, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 10.0 μg/m3 (9) 4.1 μg/m3 (17) 17.0
 
July 12, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 22.0
 
July 12, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 8.0 μg/m3 (7) 1.5 μg/m3 (6) 20.0
 
July 12, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 10.0 μg/m3 (9) -0.1 μg/m3 (0) 17.0
 
July 12, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 0.9 μg/m3 (4) 20.0
 
July 12, 2019, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 8.0 μg/m3 (7) 0.4 μg/m3 (2) 21.0
 
July 11, 2019, 11 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) -1.6 μg/m3 (0) 23.0
 
July 11, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) 0.4 μg/m3 (2) 24.0
 
July 11, 2019, 9 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) 0.3 μg/m3 (1) 25.0
 
July 11, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 0.0 μg/m3 (0) 24.0
 
July 11, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 2.8 μg/m3 (12) 24.0
 
July 11, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 11.0 μg/m3 (10) 3.8 μg/m3 (16) 25.0
 
July 11, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 0.5 μg/m3 (2) 22.0
 
July 11, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 1.3 μg/m3 (5) 22.0
 
July 11, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) -0.5 μg/m3 (0) 21.0
 
July 11, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 0.3 μg/m3 (1) 18.0
 
July 11, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 8.0 μg/m3 (7) 1.8 μg/m3 (8) 14.0
 
July 11, 2019, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 7.0 μg/m3 (6) 1.5 μg/m3 (6) 15.0
 
July 11, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 16.0
 
July 11, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 5.0 μg/m3 (5) 3.1 μg/m3 (13) 17.0
 
July 11, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 18.0
 
July 11, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 5.0 μg/m3 (5) 3.9 μg/m3 (16) 18.0
 
July 11, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 2.2 μg/m3 (9) 18.0
 
July 11, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 19.0
 
July 11, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 18.0
 
July 11, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 7.0 μg/m3 (6) 1.4 μg/m3 (6) 16.0
 
July 11, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 19.0
 
July 11, 2019, 2 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) 2.0 μg/m3 (8) 23.0
 
July 11, 2019, 1 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) 2.1 μg/m3 (9) 28.0
 
July 11, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 28.0
 
July 10, 2019, 11 p.m. 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
 
July 10, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 0.5 μg/m3 (2) 26.0
 
July 10, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) -0.3 μg/m3 (0) 26.0
 
July 10, 2019, 8 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) 1.2 μg/m3 (5) 23.0
 
July 10, 2019, 7 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) 0.7 μg/m3 (3) 23.0