AQSQID: 060376012

Site Name: Santa Clarita

Location: Santa Clarita, CA

Reporting: True, Located: True

Current AQI: 24.0

Santa Clarita CA, US: 34.3833, -118.5283

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 18, 2019, 6 p.m. 7.6 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.19 ppb (2) N/A -3.7 μg/m3 (0) 24.0
 
Jan. 18, 2019, 5 p.m. 13.3 ppb (12) 6.2 ppb (6) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.24 ppb (3) N/A 2.6 μg/m3 (11) 18.0
 
Jan. 18, 2019, 4 p.m. 56.3 ppb (52) 43.4 ppb (40) N/A 13.0 ppb (12) N/A N/A 5.0 ppb (4) 0.69 ppb (8) N/A 9.2 μg/m3 (38) 52.0
 
Jan. 18, 2019, 3 p.m. 49.4 ppb (46) 39.9 ppb (37) N/A 9.0 ppb (8) N/A N/A 3.0 ppb (2) 0.75 ppb (8) N/A 8.3 μg/m3 (35) 46.0
 
Jan. 18, 2019, 2 p.m. 31.9 ppb (30) 22.1 ppb (20) N/A 10.0 ppb (9) N/A N/A 2.0 ppb (2) 0.59 ppb (7) N/A 4.1 μg/m3 (17) 30.0
 
Jan. 18, 2019, 1 p.m. 13.8 ppb (13) 5.6 ppb (5) N/A 8.0 ppb (7) N/A N/A 4.0 ppb (3) 0.32 ppb (4) N/A 2.1 μg/m3 (9) 13.0
 
Jan. 18, 2019, noon 18.1 ppb (17) 8.8 ppb (8) N/A 9.0 ppb (8) N/A N/A 4.0 ppb (3) 0.29 ppb (3) N/A 1.2 μg/m3 (5) 17.0
 
Jan. 18, 2019, 11 a.m. 4.6 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 9.0 ppb (7) 0.2 ppb (2) N/A 0.2 μg/m3 (1) 7.0
 
Jan. 18, 2019, 10 a.m. 6.6 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 9.0 ppb (7) 0.23 ppb (3) N/A 0.7 μg/m3 (3) 7.0
 
Jan. 18, 2019, 9 a.m. 8.3 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 10.0 ppb (8) 0.25 ppb (3) N/A 3.5 μg/m3 (15) 15.0
 
Jan. 18, 2019, 8 a.m. 7.5 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 10.0 ppb (8) 0.26 ppb (3) N/A 5.8 μg/m3 (24) 24.0
 
Jan. 18, 2019, 7 a.m. 9.1 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 9.0 ppb (7) 0.26 ppb (3) N/A 3.8 μg/m3 (16) 16.0
 
Jan. 18, 2019, 6 a.m. 11.8 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 6.0 ppb (5) 0.31 ppb (3) N/A 4.6 μg/m3 (19) 19.0
 
Jan. 18, 2019, 5 a.m. 16.4 ppb (15) 5.6 ppb (5) N/A 11.0 ppb (10) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
Jan. 18, 2019, 4 a.m. 17.8 ppb (16) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) 0.29 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
Jan. 18, 2019, 3 a.m. 12.9 ppb (12) 2.2 ppb (2) N/A 11.0 ppb (10) N/A N/A 8.0 ppb (6) 0.3 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
Jan. 18, 2019, 2 a.m. 7.6 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A 6.3 μg/m3 (26) 26.0
 
Jan. 18, 2019, 1 a.m. 7.6 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.18 ppb (2) N/A 8.2 μg/m3 (34) 34.0
 
Jan. 18, 2019, midnight 8.5 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.18 ppb (2) N/A 7.2 μg/m3 (30) 30.0
 
Jan. 17, 2019, 11 p.m. 6.6 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.13 ppb (1) N/A 2.1 μg/m3 (9) 22.0
 
Jan. 17, 2019, 10 p.m. 6.5 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.1 ppb (1) N/A -1.3 μg/m3 (0) 22.0
 
Jan. 17, 2019, 9 p.m. 4.6 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.09 ppb (1) N/A -0.3 μg/m3 (0) 23.0
 
Jan. 17, 2019, 8 p.m. 6.6 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 22.0
 
Jan. 17, 2019, 7 p.m. 6.5 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.11 ppb (1) N/A 2.4 μg/m3 (10) 20.0
 
Jan. 17, 2019, 6 p.m. 8.5 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.15 ppb (2) N/A -0.8 μg/m3 (0) 18.0
 
Jan. 17, 2019, 5 p.m. 8.9 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.16 ppb (2) N/A -2.0 μg/m3 (0) 18.0
 
Jan. 17, 2019, 4 p.m. 16.8 ppb (16) 4.2 ppb (4) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.18 ppb (2) N/A -2.5 μg/m3 (0) 16.0
 
Jan. 17, 2019, 3 p.m. 17.1 ppb (16) 3.6 ppb (3) N/A 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.18 ppb (2) N/A -2.2 μg/m3 (0) 16.0
 
Jan. 17, 2019, 2 p.m. 7.0 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.15 ppb (2) N/A -0.8 μg/m3 (0) 20.0
 
Jan. 17, 2019, 1 p.m. 5.5 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.13 ppb (1) N/A 1.4 μg/m3 (6) 21.0
 
Jan. 17, 2019, noon 4.4 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.13 ppb (1) N/A 0.5 μg/m3 (2) 22.0
 
Jan. 17, 2019, 11 a.m. 3.0 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.11 ppb (1) N/A 0.7 μg/m3 (3) 24.0
 
Jan. 17, 2019, 10 a.m. 5.5 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.14 ppb (2) N/A -0.5 μg/m3 (0) 22.0
 
Jan. 17, 2019, 9 a.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.12 ppb (1) N/A -1.7 μg/m3 (0) 24.0
 
Jan. 17, 2019, 8 a.m. 2.2 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.12 ppb (1) N/A 0.5 μg/m3 (2) 25.0
 
Jan. 17, 2019, 7 a.m. 6.1 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.17 ppb (2) N/A -0.8 μg/m3 (0) 20.0
 
Jan. 17, 2019, 6 a.m. 8.3 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 23.0 ppb (18) 0.2 ppb (2) N/A -3.4 μg/m3 (0) 18.0
 
Jan. 17, 2019, 5 a.m. 8.2 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.19 ppb (2) N/A -2.0 μg/m3 (0) 19.0
 
Jan. 17, 2019, 4 a.m. 9.7 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) 0.2 ppb (2) N/A 3.8 μg/m3 (16) 18.0
 
Jan. 17, 2019, 3 a.m. 9.9 ppb (9) 1.9 ppb (2) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.19 ppb (2) N/A 4.3 μg/m3 (18) 20.0
 
Jan. 17, 2019, 2 a.m. 8.9 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.18 ppb (2) N/A 0.2 μg/m3 (1) 22.0
 
Jan. 17, 2019, 1 a.m. 11.4 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.19 ppb (2) N/A -0.8 μg/m3 (0) 19.0
 
Jan. 17, 2019, midnight 12.0 ppb (11) 1.9 ppb (2) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.18 ppb (2) N/A 1.9 μg/m3 (8) 19.0
 
Jan. 16, 2019, 11 p.m. 12.2 ppb (11) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.16 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
Jan. 16, 2019, 10 p.m. 10.8 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.14 ppb (2) N/A 4.8 μg/m3 (20) 22.0
 
Jan. 16, 2019, 9 p.m. 9.4 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) 0.15 ppb (2) N/A -1.3 μg/m3 (0) 22.0
 
Jan. 16, 2019, 8 p.m. 9.4 ppb (9) 2.9 ppb (3) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) 0.15 ppb (2) N/A N/A 22.0
 
Jan. 16, 2019, 7 p.m. 12.9 ppb (12) 3.4 ppb (3) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A -1.0 μg/m3 (0) 19.0
 
Jan. 16, 2019, 6 p.m. 19.5 ppb (18) 5.8 ppb (5) N/A 14.0 ppb (13) N/A N/A 19.0 ppb (15) 0.27 ppb (3) N/A 3.1 μg/m3 (13) 18.0
 
Jan. 16, 2019, 5 p.m. 18.6 ppb (17) 6.2 ppb (6) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.25 ppb (3) N/A 5.8 μg/m3 (24) 24.0
 
Jan. 16, 2019, 4 p.m. 22.0 ppb (20) 6.4 ppb (6) N/A 16.0 ppb (15) N/A N/A 14.0 ppb (11) 0.3 ppb (3) N/A 7.5 μg/m3 (31) 31.0
 
Jan. 16, 2019, 3 p.m. 24.8 ppb (23) 8.4 ppb (8) N/A 16.0 ppb (15) N/A N/A 8.0 ppb (6) 0.31 ppb (3) N/A 5.3 μg/m3 (22) 23.0
 
Jan. 16, 2019, 2 p.m. 18.1 ppb (17) 2.0 ppb (2) N/A 16.0 ppb (15) N/A N/A 11.0 ppb (8) 0.24 ppb (3) N/A 1.9 μg/m3 (8) 17.0
 
Jan. 16, 2019, 1 p.m. 15.5 ppb (14) 1.4 ppb (1) N/A 14.0 ppb (13) N/A N/A 12.0 ppb (9) 0.2 ppb (2) N/A 1.0 μg/m3 (4) 14.0
 
Jan. 16, 2019, noon 14.6 ppb (14) 1.5 ppb (1) N/A 13.0 ppb (12) N/A N/A 14.0 ppb (11) 0.2 ppb (2) N/A 4.3 μg/m3 (18) 18.0
 
Jan. 16, 2019, 11 a.m. 17.7 ppb (16) 1.2 ppb (1) N/A 16.0 ppb (15) N/A N/A 11.0 ppb (8) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 17.0
 
Jan. 16, 2019, 10 a.m. 8.5 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.19 ppb (2) N/A 0.5 μg/m3 (2) 17.0
 
Jan. 16, 2019, 9 a.m. 5.1 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (16) 0.19 ppb (2) N/A 1.5 μg/m3 (6) 16.0
 
Jan. 16, 2019, 8 a.m. 5.2 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) 0.19 ppb (2) N/A 0.7 μg/m3 (3) 20.0
 
Jan. 16, 2019, 7 a.m. 5.5 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.16 ppb (2) N/A 1.2 μg/m3 (5) 23.0
 
Jan. 16, 2019, 6 a.m. 5.5 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.17 ppb (2) N/A 1.7 μg/m3 (7) 25.0
 
Jan. 16, 2019, 5 a.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.14 ppb (2) N/A -0.3 μg/m3 (0) 28.0
 
Jan. 16, 2019, 4 a.m. 5.5 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.16 ppb (2) N/A -1.2 μg/m3 (0) 27.0
 
Jan. 16, 2019, 3 a.m. 6.1 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.16 ppb (2) N/A 3.1 μg/m3 (13) 27.0
 
Jan. 16, 2019, 2 a.m. 7.8 ppb (7) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.19 ppb (2) N/A 5.3 μg/m3 (22) 26.0
 
Jan. 16, 2019, 1 a.m. 7.0 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.19 ppb (2) N/A 2.9 μg/m3 (12) 28.0
 
Jan. 16, 2019, midnight 7.4 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.19 ppb (2) N/A 4.6 μg/m3 (19) 28.0
 
Jan. 15, 2019, 11 p.m. 12.0 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.23 ppb (3) N/A 7.8 μg/m3 (32) 32.0
 
Jan. 15, 2019, 10 p.m. 14.4 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.24 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
Jan. 15, 2019, 9 p.m. 9.4 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.19 ppb (2) N/A -0.8 μg/m3 (0) 27.0
 
Jan. 15, 2019, 8 p.m. 6.7 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.17 ppb (2) N/A -3.9 μg/m3 (0) 30.0
 
Jan. 15, 2019, 7 p.m. 6.0 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.16 ppb (2) N/A 0.7 μg/m3 (3) 30.0
 
Jan. 15, 2019, 6 p.m. 7.0 ppb (6) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.16 ppb (2) N/A 4.3 μg/m3 (18) 28.0
 
Jan. 15, 2019, 5 p.m. 21.8 ppb (20) 9.4 ppb (9) N/A 12.0 ppb (11) N/A N/A 10.0 ppb (8) 0.37 ppb (4) N/A 5.3 μg/m3 (22) 22.0
 
Jan. 15, 2019, 4 p.m. 35.0 ppb (32) 18.4 ppb (17) N/A 17.0 ppb (16) N/A N/A 5.0 ppb (4) 0.4 ppb (4) N/A 1.9 μg/m3 (8) 32.0
 
Jan. 15, 2019, 3 p.m. 31.7 ppb (29) 13.4 ppb (12) N/A 18.0 ppb (17) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 0.5 μg/m3 (2) 29.0
 
Jan. 15, 2019, 2 p.m. 14.4 ppb (13) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A 6.0 ppb (5) 0.27 ppb (3) N/A 4.3 μg/m3 (18) 18.0
 
Jan. 15, 2019, 1 p.m. 13.4 ppb (12) 3.2 ppb (3) N/A 10.0 ppb (9) N/A N/A 4.0 ppb (3) 0.26 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Jan. 15, 2019, noon 12.4 ppb (11) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A 7.0 ppb (5) 0.26 ppb (3) N/A 4.6 μg/m3 (19) 19.0
 
Jan. 15, 2019, 11 a.m. 11.1 ppb (10) 2.4 ppb (2) N/A 9.0 ppb (8) N/A N/A 11.0 ppb (8) 0.23 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
Jan. 15, 2019, 10 a.m. 13.8 ppb (13) 2.8 ppb (3) N/A 11.0 ppb (10) N/A N/A 8.0 ppb (6) 0.26 ppb (3) N/A 11.4 μg/m3 (48) 48.0
 
Jan. 15, 2019, 9 a.m. 11.8 ppb (11) 2.4 ppb (2) N/A 9.0 ppb (8) N/A N/A 9.0 ppb (7) 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2019, 8 a.m. 9.3 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A N/A 13.0 ppb (10) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 7 a.m. 9.0 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A 14.0 ppb (11) 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 6 a.m. 8.6 ppb (8) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) 0.24 ppb (3) N/A 8.5 μg/m3 (35) 35.0
 
Jan. 15, 2019, 5 a.m. 8.6 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 17.0
 
Jan. 15, 2019, 4 a.m. 8.3 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.17 ppb (2) N/A 5.1 μg/m3 (21) 21.0
 
Jan. 15, 2019, 3 a.m. 8.6 ppb (8) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 23.0
 
Jan. 15, 2019, 2 a.m. 12.5 ppb (12) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) 0.24 ppb (3) N/A 3.3 μg/m3 (14) 16.0
 
Jan. 15, 2019, 1 a.m. 10.6 ppb (10) 2.3 ppb (2) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 19.0
 
Jan. 15, 2019, midnight 9.3 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.18 ppb (2) N/A 1.2 μg/m3 (5) 21.0
 
Jan. 14, 2019, 11 p.m. 14.7 ppb (14) 4.8 ppb (4) N/A 10.0 ppb (9) N/A N/A 24.0 ppb (18) 0.21 ppb (2) N/A -0.8 μg/m3 (0) 18.0
 
Jan. 14, 2019, 10 p.m. 11.8 ppb (11) 3.4 ppb (3) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.17 ppb (2) N/A -2.5 μg/m3 (0) 20.0
 
Jan. 14, 2019, 9 p.m. 15.8 ppb (15) 4.2 ppb (4) N/A 12.0 ppb (11) N/A N/A 21.0 ppb (16) 0.22 ppb (2) N/A 3.3 μg/m3 (14) 16.0
 
Jan. 14, 2019, 8 p.m. 16.3 ppb (15) 3.7 ppb (3) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.44 ppb (5) N/A 7.2 μg/m3 (30) 30.0
 
Jan. 14, 2019, 7 p.m. 15.5 ppb (14) 3.4 ppb (3) N/A 12.0 ppb (11) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 2.4 μg/m3 (10) 15.0
 
Jan. 14, 2019, 6 p.m. 26.9 ppb (25) 8.0 ppb (7) N/A 19.0 ppb (18) N/A N/A 12.0 ppb (9) 0.29 ppb (3) N/A -0.3 μg/m3 (0) 25.0
 
Jan. 14, 2019, 5 p.m. 13.0 ppb (12) 3.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A 1.4 μg/m3 (6) 17.0
 
Jan. 14, 2019, 4 p.m. 21.5 ppb (20) 4.7 ppb (4) N/A 17.0 ppb (16) N/A N/A 10.0 ppb (8) 0.27 ppb (3) N/A 2.2 μg/m3 (9) 20.0
 
Jan. 14, 2019, 3 p.m. 28.9 ppb (27) 10.4 ppb (10) N/A 19.0 ppb (18) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 2.9 μg/m3 (12) 27.0
 
Jan. 14, 2019, 2 p.m. 26.8 ppb (25) 11.3 ppb (10) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) 0.36 ppb (4) N/A 3.3 μg/m3 (14) 25.0
 
Jan. 14, 2019, 1 p.m. 18.0 ppb (17) 5.8 ppb (5) N/A 12.0 ppb (11) N/A N/A 5.0 ppb (4) 0.33 ppb (4) N/A 6.3 μg/m3 (26) 26.0
 
Jan. 14, 2019, noon 12.1 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A N/A 6.0 ppb (5) 0.24 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
Jan. 14, 2019, 11 a.m. 10.7 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 6.0 ppb (5) 0.25 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
Jan. 14, 2019, 10 a.m. 10.8 ppb (10) 2.8 ppb (3) N/A 8.0 ppb (7) N/A N/A 6.0 ppb (5) 0.28 ppb (3) N/A 2.6 μg/m3 (11) 11.0
 
Jan. 14, 2019, 9 a.m. 12.9 ppb (12) 3.4 ppb (3) N/A 9.0 ppb (8) N/A N/A 4.0 ppb (3) 0.32 ppb (4) N/A 3.6 μg/m3 (15) 15.0
 
Jan. 14, 2019, 8 a.m. 11.0 ppb (10) 3.3 ppb (3) N/A 8.0 ppb (7) N/A N/A 7.0 ppb (5) 0.31 ppb (3) N/A 3.3 μg/m3 (14) 14.0
 
Jan. 14, 2019, 7 a.m. 13.2 ppb (12) 2.7 ppb (3) N/A 10.0 ppb (9) N/A N/A 6.0 ppb (5) 0.32 ppb (4) N/A 2.3 μg/m3 (10) 12.0
 
Jan. 14, 2019, 6 a.m. 14.6 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) 0.37 ppb (4) N/A 5.5 μg/m3 (23) 23.0
 
Jan. 14, 2019, 5 a.m. 18.4 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 4 a.m. 21.6 ppb (20) 6.6 ppb (6) N/A 15.0 ppb (14) N/A N/A 6.0 ppb (5) 0.43 ppb (5) N/A 5.8 μg/m3 (24) 24.0
 
Jan. 14, 2019, 3 a.m. 17.9 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A N/A 8.0 ppb (6) 0.42 ppb (5) N/A 10.7 μg/m3 (45) 45.0
 
Jan. 14, 2019, 2 a.m. 19.9 ppb (18) 3.6 ppb (3) N/A 16.0 ppb (15) N/A N/A 12.0 ppb (9) 0.49 ppb (5) N/A 9.7 μg/m3 (40) 40.0
 
Jan. 14, 2019, 1 a.m. 12.1 ppb (11) 2.3 ppb (2) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.32 ppb (4) N/A 4.3 μg/m3 (18) 20.0
 
Jan. 14, 2019, midnight 12.2 ppb (11) 2.1 ppb (2) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) 0.29 ppb (3) N/A 3.8 μg/m3 (16) 23.0
 
Jan. 13, 2019, 11 p.m. 14.0 ppb (13) 3.3 ppb (3) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.27 ppb (3) N/A 2.4 μg/m3 (10) 23.0
 
Jan. 13, 2019, 10 p.m. 6.0 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.17 ppb (2) N/A -1.5 μg/m3 (0) 26.0
 
Jan. 13, 2019, 9 p.m. 4.1 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.12 ppb (1) N/A -2.5 μg/m3 (0) 27.0
 
Jan. 13, 2019, 8 p.m. 3.9 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.11 ppb (1) N/A -1.0 μg/m3 (0) 27.0
 
Jan. 13, 2019, 7 p.m. 7.8 ppb (7) 3.6 ppb (3) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.15 ppb (2) N/A -1.5 μg/m3 (0) 23.0
 
Jan. 13, 2019, 6 p.m. 10.6 ppb (10) 5.2 ppb (5) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.17 ppb (2) N/A -0.3 μg/m3 (0) 19.0
 
Jan. 13, 2019, 5 p.m. 12.9 ppb (12) 6.3 ppb (6) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.23 ppb (3) N/A 3.4 μg/m3 (14) 15.0
 
Jan. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.5 μg/m3 (6) 6.0
 
Jan. 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -2.2 μg/m3 (0) N/A
Jan. 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -0.3 μg/m3 (0) N/A
Jan. 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.2 μg/m3 (13) 13.0
 
Jan. 13, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.3 μg/m3 (30) 30.0
 
Jan. 13, 2019, 5 a.m. 3.8 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.16 ppb (2) N/A 0.4 μg/m3 (2) 25.0
 
Jan. 13, 2019, 4 a.m. 2.7 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 26.0
 
Jan. 13, 2019, 3 a.m. 3.4 ppb (3) 1.9 ppb (2) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.16 ppb (2) N/A 1.2 μg/m3 (5) 25.0
 
Jan. 13, 2019, 2 a.m. 4.3 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.19 ppb (2) N/A 3.8 μg/m3 (16) 23.0
 
Jan. 13, 2019, 1 a.m. 4.6 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.16 ppb (2) N/A 2.6 μg/m3 (11) 22.0
 
Jan. 13, 2019, midnight 4.9 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.15 ppb (2) N/A 0.7 μg/m3 (3) 22.0
 
Jan. 12, 2019, 11 p.m. 4.2 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.14 ppb (2) N/A -2.1 μg/m3 (0) 25.0
 
Jan. 12, 2019, 10 p.m. 4.7 ppb (4) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.13 ppb (1) N/A -2.8 μg/m3 (0) 27.0
 
Jan. 12, 2019, 9 p.m. 6.1 ppb (6) 2.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.19 ppb (2) N/A -4.0 μg/m3 (0) 28.0
 
Jan. 12, 2019, 8 p.m. 6.6 ppb (6) 3.1 ppb (3) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.16 ppb (2) N/A -2.3 μg/m3 (0) 27.0
 
Jan. 12, 2019, 7 p.m. 7.8 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A 1.2 μg/m3 (5) 25.0
 
Jan. 12, 2019, 6 p.m. 8.6 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.18 ppb (2) N/A 3.3 μg/m3 (14) 23.0
 
Jan. 12, 2019, 5 p.m. 7.0 ppb (6) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 12, 2019, 4 p.m. 5.7 ppb (5) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.17 ppb (2) N/A 2.4 μg/m3 (10) 25.0
 
Jan. 12, 2019, 3 p.m. 6.9 ppb (6) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.18 ppb (2) N/A 1.2 μg/m3 (5) 25.0
 
Jan. 12, 2019, 2 p.m. 7.5 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.19 ppb (2) N/A 1.2 μg/m3 (5) 24.0
 
Jan. 12, 2019, 1 p.m. 3.9 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.17 ppb (2) N/A -2.5 μg/m3 (0) 28.0
 
Jan. 12, 2019, noon 3.2 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.16 ppb (2) N/A -4.0 μg/m3 (0) 28.0
 
Jan. 12, 2019, 11 a.m. 3.4 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.15 ppb (2) N/A 3.8 μg/m3 (16) 27.0
 
Jan. 12, 2019, 10 a.m. 7.4 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.21 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
Jan. 12, 2019, 9 a.m. 22.4 ppb (21) 5.8 ppb (5) N/A 17.0 ppb (16) N/A N/A 7.0 ppb (5) 0.48 ppb (5) N/A 26.4 μg/m3 (81) 81.0
 
Jan. 12, 2019, 8 a.m. 33.5 ppb (31) 15.6 ppb (14) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) 0.64 ppb (7) N/A 28.7 μg/m3 (86) 86.0
 
Jan. 12, 2019, 7 a.m. 37.9 ppb (35) 17.9 ppb (17) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.64 ppb (7) N/A 22.4 μg/m3 (72) 72.0
 
Jan. 12, 2019, 6 a.m. 38.0 ppb (35) 17.8 ppb (16) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.6 ppb (7) N/A 20.5 μg/m3 (68) 68.0
 
Jan. 12, 2019, 5 a.m. 44.2 ppb (41) 17.8 ppb (16) N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.71 ppb (8) N/A 27.7 μg/m3 (83) 83.0
 
Jan. 12, 2019, 4 a.m. 41.1 ppb (38) 10.0 ppb (9) N/A 31.0 ppb (29) N/A N/A 2.0 ppb (2) 0.63 ppb (7) N/A 32.0 μg/m3 (93) 93.0
 
Jan. 12, 2019, 3 a.m. 29.0 ppb (27) 2.5 ppb (2) N/A 26.0 ppb (24) N/A N/A 11.0 ppb (8) 0.43 ppb (5) N/A 23.9 μg/m3 (75) 75.0
 
Jan. 12, 2019, 2 a.m. 29.0 ppb (27) 2.8 ppb (3) N/A 26.0 ppb (24) N/A N/A 12.0 ppb (9) 0.46 ppb (5) N/A 24.4 μg/m3 (76) 76.0
 
Jan. 12, 2019, 1 a.m. 34.7 ppb (32) 3.8 ppb (4) N/A 31.0 ppb (29) N/A N/A 12.0 ppb (9) 0.5 ppb (6) N/A 21.7 μg/m3 (71) 71.0
 
Jan. 12, 2019, midnight 31.4 ppb (29) 4.6 ppb (4) N/A 27.0 ppb (25) N/A N/A 18.0 ppb (14) 0.45 ppb (5) N/A 24.4 μg/m3 (76) 76.0
 
Jan. 11, 2019, 11 p.m. 28.1 ppb (26) 6.1 ppb (6) N/A 22.0 ppb (20) N/A N/A 25.0 ppb (19) 0.38 ppb (4) N/A 22.9 μg/m3 (73) 73.0
 
Jan. 11, 2019, 10 p.m. 29.0 ppb (27) 9.0 ppb (8) N/A 20.0 ppb (19) N/A N/A 25.0 ppb (19) 0.4 ppb (4) N/A 17.7 μg/m3 (62) 62.0
 
Jan. 11, 2019, 9 p.m. 24.3 ppb (23) 8.2 ppb (8) N/A 16.0 ppb (15) N/A N/A 26.0 ppb (20) 0.39 ppb (4) N/A 15.6 μg/m3 (58) 58.0
 
Jan. 11, 2019, 8 p.m. 20.3 ppb (19) 8.3 ppb (8) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.31 ppb (3) N/A 2.3 μg/m3 (10) 22.0
 
Jan. 11, 2019, 7 p.m. 24.4 ppb (23) 11.6 ppb (11) N/A 13.0 ppb (12) N/A N/A 24.0 ppb (18) 0.3 ppb (3) N/A 5.2 μg/m3 (22) 23.0
 
Jan. 11, 2019, 6 p.m. 36.6 ppb (34) 20.0 ppb (19) N/A 17.0 ppb (16) N/A N/A 11.0 ppb (8) 0.46 ppb (5) N/A 9.9 μg/m3 (41) 41.0
 
Jan. 11, 2019, 5 p.m. 65.5 ppb (62) 52.2 ppb (48) N/A 13.0 ppb (12) N/A N/A 4.0 ppb (3) 0.72 ppb (8) N/A 11.2 μg/m3 (47) 62.0
 
Jan. 11, 2019, 4 p.m. 80.8 ppb (79) 69.1 ppb (66) N/A 12.0 ppb (11) N/A N/A 3.0 ppb (2) 0.78 ppb (9) N/A 17.5 μg/m3 (62) 79.0
 
Jan. 11, 2019, 3 p.m. 62.2 ppb (59) 54.5 ppb (51) N/A 8.0 ppb (7) N/A N/A 2.0 ppb (2) 0.81 ppb (9) N/A 11.9 μg/m3 (50) 59.0
 
Jan. 11, 2019, 2 p.m. 32.2 ppb (30) 25.4 ppb (24) N/A 7.0 ppb (6) N/A N/A 2.0 ppb (2) 0.44 ppb (5) N/A 12.4 μg/m3 (51) 51.0
 
Jan. 11, 2019, 1 p.m. 24.4 ppb (23) 18.1 ppb (17) N/A 6.0 ppb (6) N/A N/A 2.0 ppb (2) 0.41 ppb (5) N/A 9.7 μg/m3 (40) 40.0