AQSQID: 370630099

Site Name: Burdens Creek

Location: Durham Co, NC

Reporting: True, Located: True

Current AQI: 29.0

Durham Co NC, US: 35.889402, -78.8747

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 22, 2019, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 23.0 ppb (18) 0.11 ppb (1) 12.0 μg/m3 (11) 7.0 μg/m3 (29) 29.0
 
July 22, 2019, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 23.0 ppb (18) 0.12 ppb (1) 12.0 μg/m3 (11) 6.9 μg/m3 (29) 29.0
 
July 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.11 ppb (1) 13.0 μg/m3 (12) 6.7 μg/m3 (28) 28.0
 
July 22, 2019, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 25.0 ppb (19) 0.12 ppb (1) 13.0 μg/m3 (12) 6.9 μg/m3 (29) 29.0
 
July 22, 2019, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) 0.13 ppb (1) 13.0 μg/m3 (12) 7.1 μg/m3 (30) 30.0
 
July 22, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.13 ppb (1) 13.0 μg/m3 (12) 7.2 μg/m3 (30) 30.0
 
July 22, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.13 ppb (1) 13.0 μg/m3 (12) 6.9 μg/m3 (29) 29.0
 
July 21, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.12 ppb (1) 14.0 μg/m3 (13) 6.9 μg/m3 (29) 31.0
 
July 21, 2019, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 42.0 ppb (32) 0.11 ppb (1) 12.0 μg/m3 (11) 6.7 μg/m3 (28) 32.0
 
July 21, 2019, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 42.0 ppb (32) 0.11 ppb (1) 13.0 μg/m3 (12) 7.1 μg/m3 (30) 32.0
 
July 21, 2019, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 40.0 ppb (31) 0.11 ppb (1) 13.0 μg/m3 (12) 7.3 μg/m3 (30) 31.0
 
July 21, 2019, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 40.0 ppb (31) 0.11 ppb (1) 13.0 μg/m3 (12) 7.2 μg/m3 (30) 31.0
 
July 21, 2019, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 39.0 ppb (30) 0.12 ppb (1) 14.0 μg/m3 (13) 7.8 μg/m3 (32) 32.0
 
July 21, 2019, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 36.0 ppb (28) 0.12 ppb (1) 16.0 μg/m3 (15) 8.2 μg/m3 (34) 34.0
 
July 21, 2019, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 35.0 ppb (27) 0.12 ppb (1) 16.0 μg/m3 (15) 8.6 μg/m3 (36) 36.0
 
July 21, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) 0.13 ppb (1) 18.0 μg/m3 (16) 9.1 μg/m3 (38) 38.0
 
July 21, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.14 ppb (2) 19.0 μg/m3 (17) 9.6 μg/m3 (40) 40.0
 
July 21, 2019, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) 0.16 ppb (2) 18.0 μg/m3 (16) 10.2 μg/m3 (42) 42.0
 
July 21, 2019, noon N/A N/A N/A 1.0 ppb (1) N/A N/A 17.0 ppb (13) 0.16 ppb (2) 17.0 μg/m3 (15) 9.8 μg/m3 (41) 41.0
 
July 21, 2019, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 11.0 ppb (8) 0.17 ppb (2) 17.0 μg/m3 (15) 9.1 μg/m3 (38) 38.0
 
July 21, 2019, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) 18.0 μg/m3 (16) 8.9 μg/m3 (37) 37.0
 
July 21, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 10.0 ppb (8) 0.21 ppb (2) 19.0 μg/m3 (17) 9.5 μg/m3 (40) 40.0
 
July 21, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 8.0 ppb (6) N/A 21.0 μg/m3 (19) 9.8 μg/m3 (41) 41.0
 
July 21, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 9.0 ppb (7) 0.21 ppb (2) 20.0 μg/m3 (18) 9.0 μg/m3 (38) 38.0
 
July 21, 2019, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 14.0 ppb (11) 0.21 ppb (2) 17.0 μg/m3 (15) 8.4 μg/m3 (35) 35.0
 
July 21, 2019, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 14.0 ppb (11) 0.19 ppb (2) 16.0 μg/m3 (15) 7.7 μg/m3 (32) 32.0
 
July 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.18 ppb (2) 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
July 21, 2019, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) 0.17 ppb (2) 15.0 μg/m3 (14) 6.8 μg/m3 (28) 28.0
 
July 21, 2019, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) 0.16 ppb (2) 17.0 μg/m3 (15) 6.5 μg/m3 (27) 27.0
 
July 21, 2019, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) 0.17 ppb (2) 14.0 μg/m3 (13) 5.4 μg/m3 (23) 23.0
 
July 21, 2019, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) 0.14 ppb (2) 10.0 μg/m3 (9) 4.8 μg/m3 (20) 20.0
 
July 20, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 8.0 μg/m3 (7) 4.2 μg/m3 (18) 28.0
 
July 20, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.14 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 29.0
 
July 20, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.14 ppb (2) 9.0 μg/m3 (8) 4.5 μg/m3 (19) 27.0
 
July 20, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.15 ppb (2) 9.0 μg/m3 (8) 4.9 μg/m3 (20) 30.0
 
July 20, 2019, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.13 ppb (1) 13.0 μg/m3 (12) 4.7 μg/m3 (20) 26.0
 
July 20, 2019, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.13 ppb (1) 11.0 μg/m3 (10) 4.3 μg/m3 (18) 31.0
 
July 20, 2019, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) 0.15 ppb (2) 16.0 μg/m3 (15) 6.9 μg/m3 (29) 33.0
 
July 20, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) 0.17 ppb (2) 17.0 μg/m3 (15) 9.4 μg/m3 (39) 39.0
 
July 20, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) 0.17 ppb (2) 18.0 μg/m3 (16) 9.8 μg/m3 (41) 41.0
 
July 20, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.18 ppb (2) 17.0 μg/m3 (15) 9.4 μg/m3 (39) 39.0
 
July 20, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.19 ppb (2) 17.0 μg/m3 (15) 8.8 μg/m3 (37) 37.0
 
July 20, 2019, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) 0.17 ppb (2) 15.0 μg/m3 (14) 8.1 μg/m3 (34) 34.0
 
July 20, 2019, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) 0.15 ppb (2) 14.0 μg/m3 (13) 8.0 μg/m3 (33) 33.0
 
July 20, 2019, 10 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) 14.0 μg/m3 (13) 8.2 μg/m3 (34) 34.0
 
July 20, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) 0.14 ppb (2) 13.0 μg/m3 (12) 8.1 μg/m3 (34) 34.0
 
July 20, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A 14.0 μg/m3 (13) 7.8 μg/m3 (32) 32.0
 
July 20, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.13 ppb (1) 13.0 μg/m3 (12) 7.7 μg/m3 (32) 32.0
 
July 20, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.13 ppb (1) 14.0 μg/m3 (13) 7.6 μg/m3 (32) 32.0
 
July 20, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.14 ppb (2) 14.0 μg/m3 (13) 7.4 μg/m3 (31) 31.0
 
July 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.14 ppb (2) 13.0 μg/m3 (12) 7.2 μg/m3 (30) 30.0
 
July 20, 2019, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.15 ppb (2) 13.0 μg/m3 (12) 7.2 μg/m3 (30) 30.0
 
July 20, 2019, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.14 ppb (2) 12.0 μg/m3 (11) 6.9 μg/m3 (29) 29.0
 
July 20, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.14 ppb (2) 11.0 μg/m3 (10) 6.9 μg/m3 (29) 30.0
 
July 20, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.14 ppb (2) 12.0 μg/m3 (11) 7.0 μg/m3 (29) 31.0
 
July 19, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) 0.14 ppb (2) 14.0 μg/m3 (13) 7.3 μg/m3 (30) 34.0
 
July 19, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) 0.13 ppb (1) 15.0 μg/m3 (14) 7.4 μg/m3 (31) 37.0
 
July 19, 2019, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) 0.13 ppb (1) 13.0 μg/m3 (12) 7.3 μg/m3 (30) 38.0
 
July 19, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) 0.13 ppb (1) 13.0 μg/m3 (12) 7.4 μg/m3 (31) 38.0
 
July 19, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) 0.14 ppb (2) 13.0 μg/m3 (12) 7.5 μg/m3 (31) 38.0
 
July 19, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) 0.13 ppb (1) 14.0 μg/m3 (13) 7.6 μg/m3 (32) 39.0
 
July 19, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) 0.13 ppb (1) 13.0 μg/m3 (12) 7.8 μg/m3 (32) 37.0
 
July 19, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) 0.13 ppb (1) 16.0 μg/m3 (15) 8.1 μg/m3 (34) 37.0
 
July 19, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.15 ppb (2) 16.0 μg/m3 (15) 8.0 μg/m3 (33) 36.0
 
July 19, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.15 ppb (2) 16.0 μg/m3 (15) 8.5 μg/m3 (35) 35.0
 
July 19, 2019, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) 0.14 ppb (2) N/A N/A 20.0
 
July 19, 2019, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) 0.14 ppb (2) 15.0 μg/m3 (14) 7.9 μg/m3 (33) 33.0
 
July 19, 2019, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) 0.14 ppb (2) 14.0 μg/m3 (13) 7.7 μg/m3 (32) 32.0
 
July 19, 2019, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) 15.0 μg/m3 (14) 7.6 μg/m3 (32) 32.0
 
July 19, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) 0.13 ppb (1) 13.0 μg/m3 (12) 7.4 μg/m3 (31) 31.0
 
July 19, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) N/A 13.0 μg/m3 (12) 7.2 μg/m3 (30) 30.0
 
July 19, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.13 ppb (1) 13.0 μg/m3 (12) 6.9 μg/m3 (29) 29.0
 
July 19, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.13 ppb (1) 13.0 μg/m3 (12) 6.9 μg/m3 (29) 29.0
 
July 19, 2019, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.13 ppb (1) 14.0 μg/m3 (13) 6.9 μg/m3 (29) 29.0
 
July 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.14 ppb (2) 13.0 μg/m3 (12) 6.2 μg/m3 (26) 26.0
 
July 19, 2019, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.13 ppb (1) 13.0 μg/m3 (12) 5.6 μg/m3 (23) 24.0
 
July 19, 2019, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.13 ppb (1) 11.0 μg/m3 (10) 5.4 μg/m3 (23) 27.0
 
July 19, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.13 ppb (1) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 31.0
 
July 19, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.13 ppb (1) 10.0 μg/m3 (9) 4.8 μg/m3 (20) 36.0
 
July 18, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) 0.14 ppb (2) 12.0 μg/m3 (11) 5.6 μg/m3 (23) 40.0
 
July 18, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) 0.14 ppb (2) 13.0 μg/m3 (12) 5.9 μg/m3 (25) 40.0
 
July 18, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) 0.13 ppb (1) 13.0 μg/m3 (12) 5.9 μg/m3 (25) 39.0
 
July 18, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.13 ppb (1) 13.0 μg/m3 (12) 5.6 μg/m3 (23) 35.0
 
July 18, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) 0.13 ppb (1) 12.0 μg/m3 (11) 5.5 μg/m3 (23) 35.0
 
July 18, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.13 ppb (1) 11.0 μg/m3 (10) 5.4 μg/m3 (23) 35.0
 
July 18, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) 0.13 ppb (1) 10.0 μg/m3 (9) 5.2 μg/m3 (22) 32.0
 
July 18, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.16 ppb (2) 10.0 μg/m3 (9) 5.2 μg/m3 (22) 30.0
 
July 18, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) 0.17 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 28.0
 
July 18, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.13 ppb (1) 13.0 μg/m3 (12) 5.7 μg/m3 (24) 25.0
 
July 18, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.26 ppb (3) 15.0 μg/m3 (14) 7.4 μg/m3 (31) 31.0
 
July 18, 2019, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) 0.25 ppb (3) 18.0 μg/m3 (16) 7.8 μg/m3 (32) 32.0
 
July 18, 2019, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) 0.15 ppb (2) 17.0 μg/m3 (15) 8.1 μg/m3 (34) 34.0
 
July 18, 2019, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) 19.0 μg/m3 (17) 9.2 μg/m3 (38) 38.0
 
July 18, 2019, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 18.0 ppb (14) 0.14 ppb (2) 21.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
July 18, 2019, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 19.0 ppb (15) N/A 22.0 μg/m3 (20) 10.0 μg/m3 (42) 42.0
 
July 18, 2019, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) 0.14 ppb (2) 23.0 μg/m3 (21) 10.3 μg/m3 (43) 43.0
 
July 18, 2019, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.14 ppb (2) 23.0 μg/m3 (21) 10.8 μg/m3 (45) 45.0
 
July 18, 2019, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) 0.14 ppb (2) 26.0 μg/m3 (24) 10.8 μg/m3 (45) 45.0
 
July 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.14 ppb (2) 36.0 μg/m3 (33) 11.5 μg/m3 (48) 48.0
 
July 18, 2019, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.15 ppb (2) 34.0 μg/m3 (31) 15.0 μg/m3 (56) 56.0
 
July 18, 2019, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.15 ppb (2) 37.0 μg/m3 (34) 15.7 μg/m3 (58) 58.0
 
July 18, 2019, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) 0.17 ppb (2) 39.0 μg/m3 (35) 16.2 μg/m3 (59) 59.0
 
July 18, 2019, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.2 ppb (2) 38.0 μg/m3 (35) 15.5 μg/m3 (57) 57.0
 
July 17, 2019, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 23.0 ppb (18) 0.27 ppb (3) 41.0 μg/m3 (37) 15.7 μg/m3 (58) 58.0
 
July 17, 2019, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.27 ppb (3) 38.0 μg/m3 (35) 14.4 μg/m3 (55) 55.0
 
July 17, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 45.0 μg/m3 (41) 16.3 μg/m3 (59) 59.0
 
July 17, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.14 ppb (2) 51.0 μg/m3 (46) 18.4 μg/m3 (64) 64.0
 
July 17, 2019, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 37.0 ppb (28) 0.14 ppb (2) 54.0 μg/m3 (49) 18.2 μg/m3 (63) 63.0
 
July 17, 2019, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 51.0 μg/m3 (46) 17.9 μg/m3 (63) 63.0
 
July 17, 2019, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 48.0 μg/m3 (44) 17.5 μg/m3 (62) 62.0
 
July 17, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.16 ppb (2) 48.0 μg/m3 (44) 17.5 μg/m3 (62) 62.0
 
July 17, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.18 ppb (2) 42.0 μg/m3 (38) 17.2 μg/m3 (61) 61.0
 
July 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 39.0 μg/m3 (35) 16.7 μg/m3 (60) 60.0
 
July 17, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.2 ppb (2) 31.0 μg/m3 (28) 15.5 μg/m3 (57) 57.0
 
July 17, 2019, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.21 ppb (2) 25.0 μg/m3 (23) 14.8 μg/m3 (56) 56.0
 
July 17, 2019, 11 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.23 ppb (3) 22.0 μg/m3 (20) 14.2 μg/m3 (55) 55.0
 
July 17, 2019, 10 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) 21.0 μg/m3 (19) 14.2 μg/m3 (55) 55.0
 
July 17, 2019, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) 0.2 ppb (2) 21.0 μg/m3 (19) 14.0 μg/m3 (54) 54.0
 
July 17, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) N/A 20.0 μg/m3 (18) 13.4 μg/m3 (53) 53.0
 
July 17, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.19 ppb (2) 20.0 μg/m3 (18) 13.5 μg/m3 (53) 53.0
 
July 17, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.19 ppb (2) 21.0 μg/m3 (19) 13.1 μg/m3 (52) 52.0
 
July 17, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.19 ppb (2) 20.0 μg/m3 (18) 13.1 μg/m3 (52) 52.0
 
July 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.2 ppb (2) 19.0 μg/m3 (17) 13.1 μg/m3 (52) 52.0
 
July 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.21 ppb (2) 21.0 μg/m3 (19) 14.7 μg/m3 (56) 56.0
 
July 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.23 ppb (3) 24.0 μg/m3 (22) 15.9 μg/m3 (58) 58.0
 
July 17, 2019, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.25 ppb (3) 24.0 μg/m3 (22) 16.2 μg/m3 (59) 59.0
 
July 17, 2019, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.24 ppb (3) 23.0 μg/m3 (21) 15.2 μg/m3 (57) 57.0
 
July 16, 2019, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) 0.22 ppb (2) 22.0 μg/m3 (20) 14.5 μg/m3 (55) 55.0
 
July 16, 2019, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.21 ppb (2) 23.0 μg/m3 (21) 14.2 μg/m3 (55) 55.0
 
July 16, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) 0.22 ppb (2) 23.0 μg/m3 (21) 13.7 μg/m3 (54) 54.0
 
July 16, 2019, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 52.0 ppb (40) 0.2 ppb (2) 20.0 μg/m3 (18) 13.0 μg/m3 (52) 52.0
 
July 16, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) 0.2 ppb (2) 21.0 μg/m3 (19) 13.0 μg/m3 (52) 52.0
 
July 16, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) 0.2 ppb (2) 21.0 μg/m3 (19) 13.5 μg/m3 (53) 53.0
 
July 16, 2019, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 53.0 ppb (41) 0.2 ppb (2) 20.0 μg/m3 (18) 13.1 μg/m3 (52) 52.0
 
July 16, 2019, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 56.0 ppb (43) 0.19 ppb (2) 20.0 μg/m3 (18) 13.0 μg/m3 (52) 52.0
 
July 16, 2019, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 54.0 ppb (42) 0.2 ppb (2) 20.0 μg/m3 (18) 13.3 μg/m3 (53) 53.0
 
July 16, 2019, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) 0.24 ppb (3) 24.0 μg/m3 (22) 13.6 μg/m3 (53) 53.0
 
July 16, 2019, 1 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 31.0 ppb (24) 0.37 ppb (4) 23.0 μg/m3 (21) 13.5 μg/m3 (53) 53.0
 
July 16, 2019, noon N/A N/A N/A 16.0 ppb (15) N/A N/A 5.0 ppb (4) 0.5 ppb (6) 21.0 μg/m3 (19) 11.5 μg/m3 (48) 48.0
 
July 16, 2019, 11 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.45 ppb (5) 17.0 μg/m3 (15) 10.7 μg/m3 (45) 45.0
 
July 16, 2019, 10 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.29 ppb (3) 18.0 μg/m3 (16) 11.1 μg/m3 (46) 46.0
 
July 16, 2019, 9 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 2.0 ppb (2) 0.29 ppb (3) 16.0 μg/m3 (15) 10.9 μg/m3 (45) 45.0
 
July 16, 2019, 8 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A 2.0 ppb (2) N/A 16.0 μg/m3 (15) 10.5 μg/m3 (44) 44.0
 
July 16, 2019, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 ppb (5) 0.27 ppb (3) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
July 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.26 ppb (3) 16.0 μg/m3 (15) 10.1 μg/m3 (42) 42.0
 
July 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.26 ppb (3) 16.0 μg/m3 (15) 10.1 μg/m3 (42) 42.0
 
July 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.25 ppb (3) 18.0 μg/m3 (16) 10.7 μg/m3 (45) 45.0
 
July 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.22 ppb (2) 18.0 μg/m3 (16) 9.8 μg/m3 (41) 41.0
 
July 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.19 ppb (2) 17.0 μg/m3 (15) 9.7 μg/m3 (40) 40.0
 
July 16, 2019, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.21 ppb (2) 26.0 μg/m3 (24) 11.4 μg/m3 (48) 48.0
 
July 16, 2019, midnight N/A N/A N/A 4.0 ppb (4) N/A N/A 50.0 ppb (38) 0.24 ppb (3) 19.0 μg/m3 (17) 11.4 μg/m3 (48) 48.0
 
July 15, 2019, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) 0.27 ppb (3) 19.0 μg/m3 (17) 11.1 μg/m3 (46) 46.0
 
July 15, 2019, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 61.0 ppb (47) 0.21 ppb (2) 19.0 μg/m3 (17) 11.2 μg/m3 (47) 47.0
 
July 15, 2019, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) 0.22 ppb (2) 21.0 μg/m3 (19) 10.9 μg/m3 (45) 45.0
 
July 15, 2019, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) 0.2 ppb (2) 20.0 μg/m3 (18) 10.6 μg/m3 (44) 45.0
 
July 15, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) 0.19 ppb (2) 20.0 μg/m3 (18) 10.3 μg/m3 (43) 44.0
 
July 15, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) 0.18 ppb (2) 20.0 μg/m3 (18) 10.3 μg/m3 (43) 44.0
 
July 15, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) 0.18 ppb (2) 20.0 μg/m3 (18) 9.9 μg/m3 (41) 42.0
 
July 15, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) 0.17 ppb (2) 18.0 μg/m3 (16) 9.5 μg/m3 (40) 40.0
 
July 15, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) 0.17 ppb (2) 18.0 μg/m3 (16) 9.7 μg/m3 (40) 40.0
 
July 15, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.18 ppb (2) 20.0 μg/m3 (18) 10.5 μg/m3 (44) 44.0
 
July 15, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.2 ppb (2) 17.0 μg/m3 (15) 10.7 μg/m3 (45) 45.0
 
July 15, 2019, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.22 ppb (2) 20.0 μg/m3 (18) 10.9 μg/m3 (45) 45.0
 
July 15, 2019, 11 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A 12.0 ppb (9) 0.32 ppb (4) 22.0 μg/m3 (20) 12.0 μg/m3 (50) 50.0
 
July 15, 2019, 10 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) 21.0 μg/m3 (19) 13.1 μg/m3 (52) 52.0
 
July 15, 2019, 9 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.32 ppb (4) 21.0 μg/m3 (19) 13.6 μg/m3 (53) 53.0
 
July 15, 2019, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 5.0 ppb (4) N/A 19.0 μg/m3 (17) 12.7 μg/m3 (51) 51.0
 
July 15, 2019, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 8.0 ppb (6) 0.27 ppb (3) 18.0 μg/m3 (16) 11.6 μg/m3 (48) 48.0