AQSQID: 371830021

Site Name: Triple Oak - Near Road

Location: Cary, NC

Reporting: True, Located: True

Current AQI: 33.0

Cary NC, US: 35.8652, -78.8197

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 1 p.m. 8.4 ppb (8) 3.5 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 19, 2019, noon 8.8 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 11 a.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 19, 2019, 10 a.m. 7.3 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 9 a.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 8 a.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 19, 2019, 6 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 19, 2019, 5 a.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
March 19, 2019, 4 a.m. 2.5 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 19, 2019, 3 a.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 19, 2019, 2 a.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 1 a.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 19, 2019, midnight 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 18, 2019, 11 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 18, 2019, 10 p.m. 4.2 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 18, 2019, 9 p.m. 3.4 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 18, 2019, 8 p.m. 7.2 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 18, 2019, 7 p.m. 20.0 ppb (19) 8.8 ppb (8) N/A 11.0 ppb (10) N/A N/A N/A 0.29 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
March 18, 2019, 6 p.m. 16.1 ppb (15) 7.9 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 5 p.m. 13.6 ppb (13) 6.3 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 4 p.m. 14.3 ppb (13) 6.6 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 3 p.m. 26.7 ppb (25) 13.2 ppb (12) N/A 13.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 2 p.m. 44.1 ppb (41) 25.8 ppb (24) N/A 18.0 ppb (17) N/A N/A N/A 0.38 ppb (4) N/A 7.0 μg/m3 (29) 41.0
 
March 18, 2019, 1 p.m. 66.7 ppb (64) 43.3 ppb (40) N/A 23.0 ppb (21) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 64.0
 
March 18, 2019, noon 68.2 ppb (65) 49.9 ppb (46) N/A 18.0 ppb (17) N/A N/A N/A 0.59 ppb (7) N/A 7.0 μg/m3 (29) 65.0
 
March 18, 2019, 11 a.m. 47.9 ppb (44) 34.1 ppb (32) N/A 14.0 ppb (13) N/A N/A N/A 0.46 ppb (5) N/A 7.0 μg/m3 (29) 44.0
 
March 18, 2019, 10 a.m. 36.1 ppb (33) 23.2 ppb (21) N/A 13.0 ppb (12) N/A N/A N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 33.0
 
March 18, 2019, 9 a.m. 15.1 ppb (14) 3.8 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 8 a.m. 12.9 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 6 a.m. 17.0 ppb (16) 0.7 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 16.0
 
March 18, 2019, 5 a.m. 27.9 ppb (26) 5.2 ppb (5) N/A 23.0 ppb (21) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 26.0
 
March 18, 2019, 4 a.m. 31.5 ppb (29) 10.1 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 29.0
 
March 18, 2019, 3 a.m. 11.8 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
March 18, 2019, 2 a.m. 17.7 ppb (16) 3.7 ppb (3) N/A 14.0 ppb (13) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 16.0
 
March 18, 2019, 1 a.m. 13.8 ppb (13) 0.3 ppb (0) N/A 14.0 ppb (13) N/A N/A N/A 0.26 ppb (3) N/A 1.0 μg/m3 (4) 13.0
 
March 18, 2019, midnight 6.3 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 17, 2019, 11 p.m. 11.4 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 17, 2019, 10 p.m. 19.4 ppb (18) 7.6 ppb (7) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 2.0 μg/m3 (8) 18.0
 
March 17, 2019, 9 p.m. 12.1 ppb (11) 5.7 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 1.0 μg/m3 (4) 11.0
 
March 17, 2019, 8 p.m. 15.5 ppb (14) 7.1 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (12) 14.0
 
March 17, 2019, 7 p.m. 6.5 ppb (6) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 6 p.m. 7.0 ppb (6) 3.3 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
March 17, 2019, 5 p.m. 7.4 ppb (7) 3.7 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 4 p.m. 9.6 ppb (9) 4.8 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 3 p.m. 5.4 ppb (5) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 2 p.m. 6.9 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 17, 2019, 1 p.m. 6.4 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, noon 3.7 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 11 a.m. 2.8 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 17, 2019, 10 a.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 9 a.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 8 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 6 a.m. 15.6 ppb (14) 4.1 ppb (4) N/A 12.0 ppb (11) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 5 a.m. 17.3 ppb (16) 4.2 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 4 a.m. 34.8 ppb (32) 12.4 ppb (11) N/A 22.0 ppb (20) N/A N/A N/A 0.63 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 3 a.m. 20.4 ppb (19) 3.1 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 2 a.m. 15.4 ppb (14) 0.6 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 1 a.m. 11.4 ppb (11) 0.3 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
March 17, 2019, midnight 7.0 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 11 p.m. 19.2 ppb (18) 5.6 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 18.0
 
March 16, 2019, 10 p.m. 23.5 ppb (22) 9.1 ppb (8) N/A 14.0 ppb (13) N/A N/A N/A 0.4 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
March 16, 2019, 9 p.m. 14.4 ppb (13) 5.7 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 8 p.m. 13.4 ppb (12) 5.9 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A -2.0 μg/m3 (0) 12.0
 
March 16, 2019, 7 p.m. 11.8 ppb (11) 5.2 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
March 16, 2019, 6 p.m. 4.3 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 5 p.m. 8.1 ppb (8) 4.0 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 0.0 μg/m3 (0) 8.0
 
March 16, 2019, 4 p.m. 6.0 ppb (6) 2.9 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 16, 2019, 3 p.m. 4.2 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 2 p.m. 4.3 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A -1.0 μg/m3 (0) 4.0
 
March 16, 2019, 1 p.m. 5.1 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 1.0 μg/m3 (4) 5.0
 
March 16, 2019, noon 7.0 ppb (6) 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 0.0 μg/m3 (0) 6.0
 
March 16, 2019, 11 a.m. 6.3 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 16, 2019, 10 a.m. 4.2 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 16, 2019, 9 a.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) N/A -1.0 μg/m3 (0) 2.0
 
March 16, 2019, 8 a.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 6 a.m. 5.3 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 16, 2019, 5 a.m. 12.3 ppb (11) 3.8 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 4 a.m. 14.3 ppb (13) 5.2 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (8) 13.0
 
March 16, 2019, 3 a.m. 13.0 ppb (12) 6.0 ppb (6) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 2 a.m. 14.5 ppb (13) 7.8 ppb (7) N/A 7.0 ppb (6) N/A N/A N/A 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 1 a.m. 15.3 ppb (14) 7.8 ppb (7) N/A 7.0 ppb (6) N/A N/A N/A 0.36 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, midnight 11.3 ppb (10) 6.2 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 15, 2019, 11 p.m. 15.8 ppb (15) 7.7 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.4 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, 10 p.m. 23.1 ppb (21) 12.0 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.49 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
March 15, 2019, 9 p.m. 31.8 ppb (29) 16.3 ppb (15) N/A 16.0 ppb (15) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 15, 2019, 8 p.m. 34.7 ppb (32) 16.0 ppb (15) N/A 19.0 ppb (18) N/A N/A N/A 0.48 ppb (5) N/A 20.0 μg/m3 (67) 67.0
 
March 15, 2019, 7 p.m. 35.8 ppb (33) 17.3 ppb (16) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 6 p.m. 29.6 ppb (27) 15.5 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.39 ppb (4) N/A 5.0 μg/m3 (21) 27.0
 
March 15, 2019, 5 p.m. 24.6 ppb (23) 12.8 ppb (12) N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 4 p.m. 23.6 ppb (22) 12.8 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
March 15, 2019, 3 p.m. 27.0 ppb (25) 15.2 ppb (14) N/A 12.0 ppb (11) N/A N/A N/A 0.36 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 2 p.m. 28.6 ppb (26) 15.6 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
March 15, 2019, 1 p.m. 27.0 ppb (25) 14.0 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 15, 2019, noon 30.2 ppb (28) 16.8 ppb (16) N/A 13.0 ppb (12) N/A N/A N/A 0.39 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 15, 2019, 11 a.m. 28.1 ppb (26) 14.2 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.4 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 10 a.m. 29.4 ppb (27) 14.5 ppb (13) N/A 15.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 15, 2019, 9 a.m. 18.2 ppb (17) 8.6 ppb (8) N/A 10.0 ppb (9) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, 8 a.m. 14.7 ppb (14) 7.0 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 6 a.m. 8.4 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 15, 2019, 5 a.m. 7.4 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, 4 a.m. 8.6 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 3 a.m. 7.1 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 2 a.m. 12.7 ppb (12) 4.3 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 1 a.m. 23.3 ppb (22) 7.2 ppb (7) N/A 16.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, midnight 31.3 ppb (29) 9.8 ppb (9) N/A 21.0 ppb (19) N/A N/A N/A 0.49 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 14, 2019, 11 p.m. 28.4 ppb (26) 9.5 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 19.0 μg/m3 (65) 65.0
 
March 14, 2019, 10 p.m. 28.6 ppb (26) 9.8 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 46.0 μg/m3 (126) 126.0
 
March 14, 2019, 9 p.m. 25.4 ppb (24) 9.8 ppb (9) N/A 16.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 16.0 μg/m3 (59) 59.0
 
March 14, 2019, 8 p.m. 26.7 ppb (25) 11.1 ppb (10) N/A 16.0 ppb (15) N/A N/A N/A 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 14, 2019, 7 p.m. 27.5 ppb (25) 14.2 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 6 p.m. 27.0 ppb (25) 12.7 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 25.0
 
March 14, 2019, 5 p.m. 27.2 ppb (25) 14.0 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 25.0
 
March 14, 2019, 4 p.m. 25.2 ppb (23) 12.5 ppb (12) N/A 13.0 ppb (12) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 3 p.m. 25.8 ppb (24) 13.9 ppb (13) N/A 12.0 ppb (11) N/A N/A N/A 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 2 p.m. 33.6 ppb (31) 16.6 ppb (15) N/A 17.0 ppb (16) N/A N/A N/A 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 1 p.m. 45.0 ppb (42) 22.4 ppb (21) N/A 23.0 ppb (21) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 42.0
 
March 14, 2019, noon 56.1 ppb (52) 24.3 ppb (23) N/A 32.0 ppb (30) N/A N/A N/A 0.38 ppb (4) N/A 7.0 μg/m3 (29) 52.0
 
March 14, 2019, 11 a.m. 22.9 ppb (21) 4.1 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 14, 2019, 10 a.m. 49.0 ppb (45) 20.1 ppb (19) N/A 29.0 ppb (27) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (33) 45.0
 
March 14, 2019, 9 a.m. 35.9 ppb (33) 13.8 ppb (13) N/A 22.0 ppb (20) N/A N/A N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 33.0
 
March 14, 2019, 8 a.m. 21.5 ppb (20) 4.9 ppb (5) N/A 17.0 ppb (16) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 20.0
 
March 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 6 a.m. 15.7 ppb (15) 2.4 ppb (2) N/A 13.0 ppb (12) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 5 a.m. 11.3 ppb (10) 2.1 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
March 14, 2019, 4 a.m. 15.1 ppb (14) 3.8 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 3 a.m. 34.3 ppb (32) 8.5 ppb (8) N/A 26.0 ppb (24) N/A N/A N/A 0.49 ppb (5) N/A 7.0 μg/m3 (29) 32.0
 
March 14, 2019, 2 a.m. 45.1 ppb (42) 18.1 ppb (17) N/A 27.0 ppb (25) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (12) 42.0
 
March 14, 2019, 1 a.m. 16.6 ppb (15) 2.6 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 15.0
 
March 14, 2019, midnight 8.4 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 13, 2019, 11 p.m. 27.3 ppb (25) 6.6 ppb (6) N/A 21.0 ppb (19) N/A N/A N/A 0.37 ppb (4) N/A 4.0 μg/m3 (17) 25.0
 
March 13, 2019, 10 p.m. 35.7 ppb (33) 12.0 ppb (11) N/A 24.0 ppb (22) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 13, 2019, 9 p.m. 30.7 ppb (28) 10.5 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
March 13, 2019, 8 p.m. 24.9 ppb (23) 9.2 ppb (9) N/A 16.0 ppb (15) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
March 13, 2019, 7 p.m. 31.6 ppb (29) 15.1 ppb (14) N/A 17.0 ppb (16) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
March 13, 2019, 6 p.m. 26.6 ppb (25) 12.1 ppb (11) N/A 14.0 ppb (13) N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 25.0
 
March 13, 2019, 5 p.m. 28.7 ppb (27) 14.6 ppb (14) N/A 14.0 ppb (13) N/A N/A N/A 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 13, 2019, 4 p.m. 30.3 ppb (28) 15.6 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A 0.31 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 13, 2019, 3 p.m. 33.8 ppb (31) 16.7 ppb (15) N/A 17.0 ppb (16) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 13, 2019, 2 p.m. 47.9 ppb (44) 25.1 ppb (23) N/A 23.0 ppb (21) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 44.0
 
March 13, 2019, 1 p.m. 58.3 ppb (55) 34.1 ppb (32) N/A 24.0 ppb (22) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (33) 55.0
 
March 13, 2019, noon 66.9 ppb (64) 46.5 ppb (43) N/A 20.0 ppb (19) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (33) 64.0
 
March 13, 2019, 11 a.m. 50.5 ppb (47) 27.0 ppb (25) N/A 24.0 ppb (22) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 47.0
 
March 13, 2019, 10 a.m. 23.5 ppb (22) 4.6 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 13, 2019, 9 a.m. 21.4 ppb (20) 6.1 ppb (6) N/A 15.0 ppb (14) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
March 13, 2019, 8 a.m. 15.5 ppb (14) 1.5 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 13, 2019, 6 a.m. 21.9 ppb (20) 4.8 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.26 ppb (3) N/A 2.0 μg/m3 (8) 20.0
 
March 13, 2019, 5 a.m. 27.3 ppb (25) 5.0 ppb (5) N/A 22.0 ppb (20) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 25.0
 
March 13, 2019, 4 a.m. 43.8 ppb (41) 19.3 ppb (18) N/A 25.0 ppb (23) N/A N/A N/A 0.39 ppb (4) N/A 4.0 μg/m3 (17) 41.0
 
March 13, 2019, 3 a.m. 37.5 ppb (35) 8.3 ppb (8) N/A 29.0 ppb (27) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 35.0
 
March 13, 2019, 2 a.m. 46.8 ppb (43) 13.1 ppb (12) N/A 34.0 ppb (31) N/A N/A N/A 0.45 ppb (5) N/A 4.0 μg/m3 (17) 43.0
 
March 13, 2019, 1 a.m. 46.3 ppb (43) 15.2 ppb (14) N/A 31.0 ppb (29) N/A N/A N/A 0.37 ppb (4) N/A 3.0 μg/m3 (12) 43.0
 
March 13, 2019, midnight 16.4 ppb (15) 2.5 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 15.0
 
March 12, 2019, 11 p.m. 4.0 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 12, 2019, 10 p.m. 3.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A -1.0 μg/m3 (0) 3.0
 
March 12, 2019, 9 p.m. 5.8 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 8 p.m. 8.6 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 12, 2019, 7 p.m. 9.0 ppb (8) 4.1 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 12, 2019, 6 p.m. 13.6 ppb (13) 7.1 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
March 12, 2019, 5 p.m. 15.3 ppb (14) 7.7 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 4 p.m. 14.1 ppb (13) 7.1 ppb (7) N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) N/A 1.0 μg/m3 (4) 13.0
 
March 12, 2019, 3 p.m. 10.0 ppb (9) 4.8 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.13 ppb (1) N/A 2.0 μg/m3 (8) 9.0
 
March 12, 2019, 2 p.m. 13.0 ppb (12) 5.8 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0