AQSQID: 060376012

Site Name: Santa Clarita

Location: Santa Clarita, CA

Reporting: True, Located: True

Current AQI: 31.0

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
July 20, 2019, 1 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.09 ppb (1) N/A -0.6 μg/m3 (0) 31.0
 
July 20, 2019, midnight 6.3 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (41) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 41.0
 
July 19, 2019, 11 p.m. 6.9 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 66.0 ppb (51) 0.13 ppb (1) N/A 7.7 μg/m3 (32) 51.0
 
July 19, 2019, 10 p.m. 7.5 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 62.0 ppb (48) 0.12 ppb (1) N/A 5.7 μg/m3 (24) 48.0
 
July 19, 2019, 9 p.m. 8.0 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 58.0 ppb (45) 0.13 ppb (1) N/A 8.0 μg/m3 (33) 45.0
 
July 19, 2019, 8 p.m. 12.3 ppb (11) 2.7 ppb (3) N/A 10.0 ppb (9) N/A N/A 51.0 ppb (39) 0.18 ppb (2) N/A 8.5 μg/m3 (35) 39.0
 
July 19, 2019, 7 p.m. 13.0 ppb (12) 3.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 40.0 ppb (31) 0.16 ppb (2) N/A 15.3 μg/m3 (57) 57.0
 
July 19, 2019, 6 p.m. 13.2 ppb (12) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.16 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
July 19, 2019, 5 p.m. 15.3 ppb (14) 5.4 ppb (5) N/A 10.0 ppb (9) N/A N/A 33.0 ppb (25) 0.17 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
July 19, 2019, 4 p.m. 18.0 ppb (17) 7.1 ppb (7) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.19 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
July 19, 2019, 3 p.m. 18.8 ppb (17) 7.8 ppb (7) N/A 11.0 ppb (10) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A 13.1 μg/m3 (52) 52.0
 
July 19, 2019, 2 p.m. 16.8 ppb (16) 6.3 ppb (6) N/A 11.0 ppb (10) N/A N/A 15.0 ppb (12) 0.17 ppb (2) N/A 12.6 μg/m3 (51) 51.0
 
July 19, 2019, 1 p.m. 9.7 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 16.0 ppb (12) 0.12 ppb (1) N/A 7.9 μg/m3 (33) 33.0
 
July 19, 2019, noon 13.0 ppb (12) 1.2 ppb (1) N/A 12.0 ppb (11) N/A N/A 12.0 ppb (9) 0.13 ppb (1) N/A 4.3 μg/m3 (18) 18.0
 
July 19, 2019, 11 a.m. 19.9 ppb (18) 1.4 ppb (1) N/A 19.0 ppb (18) N/A N/A 6.0 ppb (5) 0.14 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
July 19, 2019, 10 a.m. 19.8 ppb (18) 1.0 ppb (1) N/A 19.0 ppb (18) N/A N/A 8.0 ppb (6) 0.13 ppb (1) N/A 7.7 μg/m3 (32) 32.0
 
July 19, 2019, 9 a.m. 17.7 ppb (16) 0.9 ppb (1) N/A 17.0 ppb (16) N/A N/A 10.0 ppb (8) 0.22 ppb (2) N/A 8.2 μg/m3 (34) 34.0
 
July 19, 2019, 8 a.m. 13.5 ppb (12) 0.7 ppb (1) N/A 13.0 ppb (12) N/A N/A 13.0 ppb (10) 0.22 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
July 19, 2019, 7 a.m. 7.4 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.08 ppb (1) N/A 10.4 μg/m3 (43) 43.0
 
July 19, 2019, 6 a.m. 7.4 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) 0.09 ppb (1) N/A 6.2 μg/m3 (26) 26.0
 
July 19, 2019, 5 a.m. 14.2 ppb (13) 0.5 ppb (0) N/A 14.0 ppb (13) N/A N/A 25.0 ppb (19) 0.19 ppb (2) N/A 4.3 μg/m3 (18) 19.0
 
July 19, 2019, 4 a.m. 20.8 ppb (19) 4.4 ppb (4) N/A 16.0 ppb (15) N/A N/A 25.0 ppb (19) 0.19 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
July 19, 2019, 3 a.m. 8.5 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.12 ppb (1) N/A 3.5 μg/m3 (15) 27.0
 
July 19, 2019, 2 a.m. 8.5 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 21.0
 
July 19, 2019, 1 a.m. 5.0 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) 0.06 ppb (1) N/A 1.2 μg/m3 (5) 19.0
 
July 19, 2019, midnight 3.4 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.05 ppb (1) N/A 0.7 μg/m3 (3) 20.0
 
July 18, 2019, 11 p.m. 3.2 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.04 ppb (0) N/A 2.8 μg/m3 (12) 24.0
 
July 18, 2019, 10 p.m. 4.3 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
July 18, 2019, 9 p.m. 5.4 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.08 ppb (1) N/A 10.7 μg/m3 (45) 45.0
 
July 18, 2019, 8 p.m. 7.9 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 69.0 ppb (53) 0.15 ppb (2) N/A 13.4 μg/m3 (53) 53.0
 
July 18, 2019, 7 p.m. 9.3 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 64.0 ppb (49) 0.16 ppb (2) N/A 13.9 μg/m3 (54) 54.0
 
July 18, 2019, 6 p.m. 12.3 ppb (11) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A 53.0 ppb (41) 0.19 ppb (2) N/A 16.5 μg/m3 (60) 60.0
 
July 18, 2019, 5 p.m. 17.0 ppb (16) 5.2 ppb (5) N/A 12.0 ppb (11) N/A N/A 42.0 ppb (32) 0.22 ppb (2) N/A 12.9 μg/m3 (52) 52.0
 
July 18, 2019, 4 p.m. 16.1 ppb (15) 4.6 ppb (4) N/A 12.0 ppb (11) N/A N/A 35.0 ppb (27) 0.2 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
July 18, 2019, 3 p.m. 23.1 ppb (21) 8.5 ppb (8) N/A 15.0 ppb (14) N/A N/A 24.0 ppb (18) 0.25 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
July 18, 2019, 2 p.m. 18.6 ppb (17) 6.5 ppb (6) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.17 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
July 18, 2019, 1 p.m. 19.0 ppb (18) 6.3 ppb (6) N/A 13.0 ppb (12) N/A N/A 6.0 ppb (5) 0.33 ppb (4) N/A 12.1 μg/m3 (50) 50.0
 
July 18, 2019, noon 14.5 ppb (13) 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) 0.25 ppb (3) N/A 12.9 μg/m3 (52) 52.0
 
July 18, 2019, 11 a.m. 12.2 ppb (11) 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A 10.0 ppb (8) 0.2 ppb (2) N/A 13.6 μg/m3 (53) 53.0
 
July 18, 2019, 10 a.m. 12.7 ppb (12) 1.2 ppb (1) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.16 ppb (2) N/A 13.1 μg/m3 (52) 52.0
 
July 18, 2019, 9 a.m. 14.0 ppb (13) 1.2 ppb (1) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) 0.14 ppb (2) N/A 7.7 μg/m3 (32) 32.0
 
July 18, 2019, 8 a.m. 7.4 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 18.0
 
July 18, 2019, 7 a.m. 10.3 ppb (10) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.11 ppb (1) N/A 17.0 μg/m3 (61) 61.0
 
July 18, 2019, 6 a.m. 11.5 ppb (11) 0.8 ppb (1) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.17 ppb (2) N/A 11.9 μg/m3 (50) 50.0
 
July 18, 2019, 5 a.m. 17.8 ppb (16) 1.1 ppb (1) N/A 17.0 ppb (16) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 11.7 μg/m3 (49) 49.0
 
July 18, 2019, 4 a.m. 18.7 ppb (17) 1.6 ppb (1) N/A 17.0 ppb (16) N/A N/A 30.0 ppb (23) 0.14 ppb (2) N/A 14.8 μg/m3 (56) 56.0
 
July 18, 2019, 3 a.m. 10.6 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 42.0 ppb (32) 0.15 ppb (2) N/A 12.2 μg/m3 (50) 50.0
 
July 18, 2019, 2 a.m. 9.2 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 53.0 ppb (41) 0.14 ppb (2) N/A 11.6 μg/m3 (48) 48.0
 
July 18, 2019, 1 a.m. 7.8 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 62.0 ppb (48) 0.13 ppb (1) N/A 10.9 μg/m3 (45) 48.0
 
July 18, 2019, midnight 7.1 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 68.0 ppb (52) 0.14 ppb (2) N/A 14.8 μg/m3 (56) 56.0
 
July 17, 2019, 11 p.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 68.0 ppb (52) 0.14 ppb (2) N/A 8.2 μg/m3 (34) 52.0
 
July 17, 2019, 10 p.m. 7.0 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 69.0 ppb (53) 0.16 ppb (2) N/A 12.6 μg/m3 (51) 53.0
 
July 17, 2019, 9 p.m. 7.0 ppb (6) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 69.0 ppb (53) 0.2 ppb (2) N/A 12.6 μg/m3 (51) 53.0
 
July 17, 2019, 8 p.m. 8.9 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 69.0 ppb (53) 0.24 ppb (3) N/A 13.4 μg/m3 (53) 53.0
 
July 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (61) 61.0
 
July 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 18.0 μg/m3 (63) 63.0
 
July 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 19.2 μg/m3 (65) 65.0
 
July 17, 2019, 4 p.m. 17.7 ppb (16) 4.8 ppb (4) N/A 13.0 ppb (12) N/A N/A 37.0 ppb (28) 0.22 ppb (2) N/A 17.5 μg/m3 (62) 62.0
 
July 17, 2019, 3 p.m. 17.7 ppb (16) 5.5 ppb (5) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.19 ppb (2) N/A 18.5 μg/m3 (64) 64.0
 
July 17, 2019, 2 p.m. 17.6 ppb (16) 5.7 ppb (5) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.13 ppb (1) N/A 9.4 μg/m3 (39) 39.0
 
July 17, 2019, 1 p.m. 12.8 ppb (12) 2.3 ppb (2) N/A 11.0 ppb (10) N/A N/A 13.0 ppb (10) 0.14 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
July 17, 2019, noon 17.8 ppb (16) 1.7 ppb (2) N/A 16.0 ppb (15) N/A N/A 8.0 ppb (6) 0.25 ppb (3) N/A 19.7 μg/m3 (66) 66.0
 
July 17, 2019, 11 a.m. 25.9 ppb (24) 3.2 ppb (3) N/A 23.0 ppb (21) N/A N/A 4.0 ppb (3) 0.21 ppb (2) N/A 18.2 μg/m3 (63) 63.0
 
July 17, 2019, 10 a.m. 20.7 ppb (19) 1.5 ppb (1) N/A 19.0 ppb (18) N/A N/A 9.0 ppb (7) 0.22 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
July 17, 2019, 9 a.m. 16.3 ppb (15) 1.2 ppb (1) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.21 ppb (2) N/A 19.2 μg/m3 (65) 65.0
 
July 17, 2019, 8 a.m. 15.8 ppb (15) 1.2 ppb (1) N/A 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.22 ppb (2) N/A 18.4 μg/m3 (64) 64.0
 
July 17, 2019, 7 a.m. 19.0 ppb (18) 1.1 ppb (1) N/A 18.0 ppb (17) N/A N/A 23.0 ppb (18) 0.24 ppb (3) N/A 16.5 μg/m3 (60) 60.0
 
July 17, 2019, 6 a.m. 20.5 ppb (19) 1.2 ppb (1) N/A 19.0 ppb (18) N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 23.1 μg/m3 (74) 74.0
 
July 17, 2019, 5 a.m. 20.2 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A N/A 32.0 ppb (25) 0.28 ppb (3) N/A 20.0 μg/m3 (67) 67.0
 
July 17, 2019, 4 a.m. 14.9 ppb (14) 0.5 ppb (0) N/A 14.0 ppb (13) N/A N/A 46.0 ppb (35) 0.23 ppb (3) N/A 11.1 μg/m3 (46) 46.0
 
July 17, 2019, 3 a.m. 14.7 ppb (14) 0.7 ppb (1) N/A 14.0 ppb (13) N/A N/A 56.0 ppb (43) 0.22 ppb (2) N/A 18.7 μg/m3 (64) 64.0
 
July 17, 2019, 2 a.m. 11.4 ppb (11) 0.8 ppb (1) N/A 11.0 ppb (10) N/A N/A 70.0 ppb (54) 0.21 ppb (2) N/A 18.5 μg/m3 (64) 64.0
 
July 17, 2019, 1 a.m. 8.2 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 81.0 ppb (63) 0.18 ppb (2) N/A 18.0 μg/m3 (63) 63.0
 
July 17, 2019, midnight 7.7 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 81.0 ppb (63) 0.17 ppb (2) N/A 16.5 μg/m3 (60) 63.0
 
July 16, 2019, 11 p.m. 6.3 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 83.0 ppb (65) 0.18 ppb (2) N/A 11.9 μg/m3 (50) 65.0
 
July 16, 2019, 10 p.m. 7.0 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 91.0 ppb (72) 0.24 ppb (3) N/A 12.4 μg/m3 (51) 72.0
 
July 16, 2019, 9 p.m. 8.0 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 96.0 ppb (76) 0.29 ppb (3) N/A 13.9 μg/m3 (54) 76.0
 
July 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.1 μg/m3 (50) 50.0
 
July 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.4 μg/m3 (48) 48.0
 
July 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.4 μg/m3 (51) 51.0
 
July 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.7 μg/m3 (40) 40.0
 
July 16, 2019, 4 p.m. 13.2 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A 44.0 ppb (34) 0.2 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
July 16, 2019, 3 p.m. 29.8 ppb (28) 11.0 ppb (10) N/A 19.0 ppb (18) N/A N/A 24.0 ppb (18) 0.31 ppb (3) N/A 10.4 μg/m3 (43) 43.0
 
July 16, 2019, 2 p.m. 44.2 ppb (41) 20.7 ppb (19) N/A 24.0 ppb (22) N/A N/A 11.0 ppb (8) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 41.0
 
July 16, 2019, 1 p.m. 30.2 ppb (28) 12.1 ppb (11) N/A 18.0 ppb (17) N/A N/A 9.0 ppb (7) 0.27 ppb (3) N/A 6.2 μg/m3 (26) 28.0
 
July 16, 2019, noon 10.7 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 17.0 ppb (13) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 16, 2019, 11 a.m. 7.0 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (15) 0.13 ppb (1) N/A 8.2 μg/m3 (34) 34.0
 
July 16, 2019, 10 a.m. 7.2 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 20.0 ppb (15) 0.14 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
July 16, 2019, 9 a.m. 7.2 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 21.0 ppb (16) 0.13 ppb (1) N/A 1.8 μg/m3 (8) 16.0
 
July 16, 2019, 8 a.m. 5.9 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (18) 0.14 ppb (2) N/A 2.6 μg/m3 (11) 18.0
 
July 16, 2019, 7 a.m. 8.1 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 21.0 ppb (16) 0.17 ppb (2) N/A 3.5 μg/m3 (15) 16.0
 
July 16, 2019, 6 a.m. 12.6 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 20.0 ppb (15) 0.24 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
July 16, 2019, 5 a.m. 22.1 ppb (20) 0.9 ppb (1) N/A 21.0 ppb (19) N/A N/A 18.0 ppb (14) 0.4 ppb (4) N/A 6.7 μg/m3 (28) 28.0
 
July 16, 2019, 4 a.m. 22.8 ppb (21) 0.5 ppb (0) N/A 22.0 ppb (20) N/A N/A 27.0 ppb (21) 0.44 ppb (5) N/A 10.7 μg/m3 (45) 45.0
 
July 16, 2019, 3 a.m. 20.8 ppb (19) 0.7 ppb (1) N/A 20.0 ppb (19) N/A N/A 46.0 ppb (35) 0.37 ppb (4) N/A 13.6 μg/m3 (53) 53.0
 
July 16, 2019, 2 a.m. 16.2 ppb (15) 0.7 ppb (1) N/A 15.0 ppb (14) N/A N/A 65.0 ppb (50) 0.3 ppb (3) N/A 13.9 μg/m3 (54) 54.0
 
July 16, 2019, 1 a.m. 8.8 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 83.0 ppb (65) 0.21 ppb (2) N/A 12.8 μg/m3 (52) 65.0
 
July 16, 2019, midnight 8.2 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 87.0 ppb (68) 0.2 ppb (2) N/A 10.4 μg/m3 (43) 68.0
 
July 15, 2019, 11 p.m. 9.4 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 90.0 ppb (71) 0.21 ppb (2) N/A 10.9 μg/m3 (45) 71.0
 
July 15, 2019, 10 p.m. 9.4 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 100.0 ppb (79) 0.24 ppb (3) N/A 10.7 μg/m3 (45) 79.0
 
July 15, 2019, 9 p.m. 6.2 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 96.0 ppb (76) 0.25 ppb (3) N/A 5.2 μg/m3 (22) 76.0
 
July 15, 2019, 8 p.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 65.0 ppb (50) 0.13 ppb (1) N/A 2.3 μg/m3 (10) 50.0
 
July 15, 2019, 7 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 66.0 ppb (51) 0.12 ppb (1) N/A 1.8 μg/m3 (8) 51.0
 
July 15, 2019, 6 p.m. 3.6 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 70.0 ppb (54) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 54.0
 
July 15, 2019, 5 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 65.0 ppb (50) 0.12 ppb (1) N/A 2.3 μg/m3 (10) 50.0
 
July 15, 2019, 4 p.m. 11.0 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A 55.0 ppb (42) 0.17 ppb (2) N/A -1.1 μg/m3 (0) 42.0
 
July 15, 2019, 3 p.m. 28.4 ppb (26) 7.4 ppb (7) N/A 21.0 ppb (19) N/A N/A 37.0 ppb (28) 0.4 ppb (4) N/A 5.7 μg/m3 (24) 28.0
 
July 15, 2019, 2 p.m. 40.3 ppb (37) 13.2 ppb (12) N/A 27.0 ppb (25) N/A N/A 19.0 ppb (15) 0.37 ppb (4) N/A 9.4 μg/m3 (39) 39.0
 
July 15, 2019, 1 p.m. 29.3 ppb (27) 5.8 ppb (5) N/A 23.0 ppb (21) N/A N/A 14.0 ppb (11) 0.29 ppb (3) N/A 4.7 μg/m3 (20) 27.0
 
July 15, 2019, noon 13.6 ppb (13) 1.1 ppb (1) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.18 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
July 15, 2019, 11 a.m. 6.2 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.13 ppb (1) N/A 6.7 μg/m3 (28) 28.0
 
July 15, 2019, 10 a.m. 6.4 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) 0.17 ppb (2) N/A 11.4 μg/m3 (48) 48.0
 
July 15, 2019, 9 a.m. 8.2 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.18 ppb (2) N/A 7.7 μg/m3 (32) 32.0
 
July 15, 2019, 8 a.m. 9.5 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) 0.24 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
July 15, 2019, 7 a.m. 12.4 ppb (11) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 21.0 ppb (16) 0.26 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
July 15, 2019, 6 a.m. 17.5 ppb (16) 0.7 ppb (1) N/A 17.0 ppb (16) N/A N/A 19.0 ppb (15) 0.39 ppb (4) N/A 12.9 μg/m3 (52) 52.0
 
July 15, 2019, 5 a.m. 9.7 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.19 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
July 15, 2019, 4 a.m. 6.7 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.15 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
July 15, 2019, 3 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.1 ppb (1) N/A 10.6 μg/m3 (44) 44.0
 
July 15, 2019, 2 a.m. 4.3 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) 0.12 ppb (1) N/A 9.7 μg/m3 (40) 42.0
 
July 15, 2019, 1 a.m. 3.5 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) 0.08 ppb (1) N/A 4.5 μg/m3 (19) 40.0
 
July 15, 2019, midnight 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 63.0 ppb (48) 0.11 ppb (1) N/A 7.4 μg/m3 (31) 48.0
 
July 14, 2019, 11 p.m. 3.7 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 85.0 ppb (67) 0.16 ppb (2) N/A 11.2 μg/m3 (47) 67.0
 
July 14, 2019, 10 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 83.0 ppb (65) 0.16 ppb (2) N/A 6.7 μg/m3 (28) 65.0
 
July 14, 2019, 9 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 75.0 ppb (58) 0.15 ppb (2) N/A 6.7 μg/m3 (28) 58.0
 
July 14, 2019, 8 p.m. 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 83.0 ppb (65) 0.17 ppb (2) N/A 11.6 μg/m3 (48) 65.0
 
July 14, 2019, 7 p.m. 4.3 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 77.0 ppb (60) 0.15 ppb (2) N/A 13.1 μg/m3 (52) 60.0
 
July 14, 2019, 6 p.m. 5.4 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 78.0 ppb (61) 0.2 ppb (2) N/A 9.4 μg/m3 (39) 61.0
 
July 14, 2019, 5 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 71.0 ppb (55) 0.12 ppb (1) N/A 6.2 μg/m3 (26) 55.0
 
July 14, 2019, 4 p.m. 6.4 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 64.0 ppb (49) 0.18 ppb (2) N/A 20.7 μg/m3 (69) 69.0
 
July 14, 2019, 3 p.m. 8.0 ppb (7) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 48.0 ppb (37) 0.19 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
July 14, 2019, 2 p.m. 10.1 ppb (9) 2.1 ppb (2) N/A 8.0 ppb (7) N/A N/A 30.0 ppb (23) 0.23 ppb (3) N/A 8.4 μg/m3 (35) 35.0
 
July 14, 2019, 1 p.m. 14.3 ppb (13) 2.3 ppb (2) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.26 ppb (3) N/A 17.2 μg/m3 (61) 61.0
 
July 14, 2019, noon 11.8 ppb (11) 1.2 ppb (1) N/A 11.0 ppb (10) N/A N/A 17.0 ppb (13) 0.24 ppb (3) N/A 18.7 μg/m3 (64) 64.0
 
July 14, 2019, 11 a.m. 11.7 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 21.0 ppb (16) 0.22 ppb (2) N/A 9.2 μg/m3 (38) 38.0
 
July 14, 2019, 10 a.m. 14.0 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.22 ppb (2) N/A 14.4 μg/m3 (55) 55.0
 
July 14, 2019, 9 a.m. 9.1 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) 0.25 ppb (3) N/A 20.7 μg/m3 (69) 69.0
 
July 14, 2019, 8 a.m. 9.4 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) 0.27 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
July 14, 2019, 7 a.m. 4.8 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.08 ppb (1) N/A 11.1 μg/m3 (46) 46.0
 
July 14, 2019, 6 a.m. 7.9 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.15 ppb (2) N/A 13.4 μg/m3 (53) 53.0
 
July 14, 2019, 5 a.m. 12.0 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 48.0 ppb (37) 0.24 ppb (3) N/A 18.7 μg/m3 (64) 64.0
 
July 14, 2019, 4 a.m. 8.4 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 52.0 ppb (40) 0.18 ppb (2) N/A 13.9 μg/m3 (54) 54.0
 
July 14, 2019, 3 a.m. 10.6 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 72.0 ppb (56) 0.25 ppb (3) N/A 21.9 μg/m3 (71) 71.0
 
July 14, 2019, 2 a.m. 8.1 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 81.0 ppb (63) 0.23 ppb (3) N/A 14.4 μg/m3 (55) 63.0
 
July 14, 2019, 1 a.m. 6.6 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 90.0 ppb (71) 0.19 ppb (2) N/A 14.7 μg/m3 (56) 71.0
 
July 14, 2019, midnight 4.8 ppb (4) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 103.0 ppb (82) 0.17 ppb (2) N/A 18.7 μg/m3 (64) 82.0
 
July 13, 2019, 11 p.m. 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 103.0 ppb (82) 0.17 ppb (2) N/A 17.0 μg/m3 (61) 82.0
 
July 13, 2019, 10 p.m. 5.5 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 106.0 ppb (84) 0.17 ppb (2) N/A 16.8 μg/m3 (60) 84.0
 
July 13, 2019, 9 p.m. 6.7 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 109.0 ppb (87) 0.2 ppb (2) N/A 17.0 μg/m3 (61) 87.0
 
July 13, 2019, 8 p.m. 9.1 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 100.0 ppb (79) 0.24 ppb (3) N/A 12.6 μg/m3 (51) 79.0
 
July 13, 2019, 7 p.m. 11.1 ppb (10) 1.4 ppb (1) N/A 10.0 ppb (9) N/A N/A 90.0 ppb (71) 0.27 ppb (3) N/A 11.6 μg/m3 (48) 71.0
 
July 13, 2019, 6 p.m. 14.5 ppb (13) 1.7 ppb (2) N/A 13.0 ppb (12) N/A N/A 82.0 ppb (64) 0.33 ppb (4) N/A 21.9 μg/m3 (71) 71.0
 
July 13, 2019, 5 p.m. 11.2 ppb (10) 1.7 ppb (2) N/A 10.0 ppb (9) N/A N/A 67.0 ppb (52) 0.24 ppb (3) N/A 9.4 μg/m3 (39) 52.0
 
July 13, 2019, 4 p.m. 12.6 ppb (12) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 51.0 ppb (39) 0.24 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
July 13, 2019, 3 p.m. 19.8 ppb (18) 5.5 ppb (5) N/A 14.0 ppb (13) N/A N/A 32.0 ppb (25) 0.32 ppb (4) N/A 13.4 μg/m3 (53) 53.0
 
July 13, 2019, 2 p.m. 28.9 ppb (27) 9.9 ppb (9) N/A 19.0 ppb (18) N/A N/A 18.0 ppb (14) 0.43 ppb (5) N/A 14.1 μg/m3 (54) 54.0
 
July 13, 2019, 1 p.m. 17.1 ppb (16) 2.6 ppb (2) N/A 14.0 ppb (13) N/A N/A 14.0 ppb (11) 0.27 ppb (3) N/A 8.4 μg/m3 (35) 35.0
 
July 13, 2019, noon 15.3 ppb (14) 1.3 ppb (1) N/A 14.0 ppb (13) N/A N/A 12.0 ppb (9) 0.23 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
July 13, 2019, 11 a.m. 10.1 ppb (9) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.19 ppb (2) N/A 11.1 μg/m3 (46) 46.0
 
July 13, 2019, 10 a.m. 12.9 ppb (12) 1.2 ppb (1) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.21 ppb (2) N/A 15.5 μg/m3 (57) 57.0
 
July 13, 2019, 9 a.m. 25.3 ppb (23) 2.0 ppb (2) N/A 23.0 ppb (21) N/A N/A 10.0 ppb (8) 0.24 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
July 13, 2019, 8 a.m. 12.3 ppb (11) 0.8 ppb (1) N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) 0.25 ppb (3) N/A 10.4 μg/m3 (43) 43.0
 
July 13, 2019, 7 a.m. 14.2 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) 0.26 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
July 13, 2019, 6 a.m. 19.9 ppb (18) 0.8 ppb (1) N/A 19.0 ppb (18) N/A N/A 20.0 ppb (15) 0.31 ppb (3) N/A 16.3 μg/m3 (59) 59.0
 
July 13, 2019, 5 a.m. 11.8 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 32.0 ppb (25) 0.28 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
July 13, 2019, 4 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.06 ppb (1) N/A 10.4 μg/m3 (43) 43.0
 
July 13, 2019, 3 a.m. 6.2 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 48.0 ppb (37) 0.07 ppb (1) N/A 11.1 μg/m3 (46) 46.0
 
July 13, 2019, 2 a.m. 5.6 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 58.0 ppb (45) 0.09 ppb (1) N/A 12.4 μg/m3 (51) 51.0