AQSQID: 060376012

Site Name: Santa Clarita

Location: Santa Clarita, CA

Reporting: True, Located: True

Current AQI: 44.0

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
Sept. 19, 2019, 3 p.m. 21.5 ppb (20) 4.7 ppb (4) N/A 17.0 ppb (16) N/A N/A 18.0 ppb (14) 0.26 ppb (3) N/A 10.6 μg/m3 (44) 44.0
 
Sept. 19, 2019, 2 p.m. 13.6 ppb (13) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.16 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
Sept. 19, 2019, 1 p.m. 11.7 ppb (11) -0.7 ppb (0) N/A 12.0 ppb (11) N/A N/A 20.0 ppb (15) 0.15 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
Sept. 19, 2019, noon 11.0 ppb (10) -0.7 ppb (0) N/A 12.0 ppb (11) N/A N/A 22.0 ppb (17) 0.14 ppb (2) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 19, 2019, 11 a.m. 13.3 ppb (12) -1.4 ppb (0) N/A 15.0 ppb (14) N/A N/A 19.0 ppb (15) 0.19 ppb (2) N/A 12.8 μg/m3 (52) 52.0
 
Sept. 19, 2019, 10 a.m. 13.1 ppb (12) -1.4 ppb (0) N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) 0.21 ppb (2) N/A 9.4 μg/m3 (39) 39.0
 
Sept. 19, 2019, 9 a.m. 14.8 ppb (14) -1.4 ppb (0) N/A 16.0 ppb (15) N/A N/A 18.0 ppb (14) 0.24 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 19, 2019, 8 a.m. 20.5 ppb (19) -0.9 ppb (0) N/A 21.0 ppb (19) N/A N/A 11.0 ppb (8) 0.23 ppb (3) N/A 11.1 μg/m3 (46) 46.0
 
Sept. 19, 2019, 7 a.m. 17.3 ppb (16) -1.6 ppb (0) N/A 19.0 ppb (18) N/A N/A 16.0 ppb (12) 0.18 ppb (2) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 19, 2019, 6 a.m. 15.6 ppb (14) -1.5 ppb (0) N/A 17.0 ppb (16) N/A N/A 19.0 ppb (15) 0.19 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
Sept. 19, 2019, 5 a.m. 9.6 ppb (9) -1.6 ppb (0) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.18 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
Sept. 19, 2019, 4 a.m. 3.8 ppb (4) -1.6 ppb (0) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.08 ppb (1) N/A 5.2 μg/m3 (22) 31.0
 
Sept. 19, 2019, 3 a.m. 3.8 ppb (4) -1.6 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.09 ppb (1) N/A 7.4 μg/m3 (31) 35.0
 
Sept. 19, 2019, 2 a.m. 4.8 ppb (4) -1.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 47.0 ppb (36) 0.1 ppb (1) N/A 5.9 μg/m3 (25) 36.0
 
Sept. 19, 2019, 1 a.m. 4.0 ppb (4) -1.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) 0.08 ppb (1) N/A 5.0 μg/m3 (21) 39.0
 
Sept. 19, 2019, midnight 4.1 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (43) 0.08 ppb (1) N/A 7.1 μg/m3 (30) 43.0
 
Sept. 18, 2019, 11 p.m. 5.5 ppb (5) -1.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 62.0 ppb (48) 0.12 ppb (1) N/A 8.6 μg/m3 (36) 48.0
 
Sept. 18, 2019, 10 p.m. 7.0 ppb (6) -1.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 76.0 ppb (59) 0.16 ppb (2) N/A 12.6 μg/m3 (51) 59.0
 
Sept. 18, 2019, 9 p.m. 7.7 ppb (7) -1.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 78.0 ppb (61) 0.2 ppb (2) N/A 10.8 μg/m3 (45) 61.0
 
Sept. 18, 2019, 8 p.m. 9.5 ppb (9) -0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 67.0 ppb (52) 0.22 ppb (2) N/A 8.4 μg/m3 (35) 52.0
 
Sept. 18, 2019, 7 p.m. 8.6 ppb (8) -0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 57.0 ppb (44) 0.19 ppb (2) N/A 6.6 μg/m3 (28) 44.0
 
Sept. 18, 2019, 6 p.m. 10.6 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 49.0 ppb (38) 0.2 ppb (2) N/A 3.5 μg/m3 (15) 38.0
 
Sept. 18, 2019, 5 p.m. 13.3 ppb (12) 1.5 ppb (1) N/A 12.0 ppb (11) N/A N/A 42.0 ppb (32) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 32.0
 
Sept. 18, 2019, 4 p.m. 16.1 ppb (15) 3.0 ppb (3) N/A 13.0 ppb (12) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 2.2 μg/m3 (9) 26.0
 
Sept. 18, 2019, 3 p.m. 36.6 ppb (34) 13.3 ppb (12) N/A 23.0 ppb (21) N/A N/A 17.0 ppb (13) 0.4 ppb (4) N/A 3.0 μg/m3 (12) 34.0
 
Sept. 18, 2019, 2 p.m. 81.1 ppb (79) 51.4 ppb (48) N/A 30.0 ppb (28) N/A N/A 3.0 ppb (2) 0.58 ppb (6) N/A 15.7 μg/m3 (58) 79.0
 
Sept. 18, 2019, 1 p.m. 40.3 ppb (37) 14.7 ppb (14) N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.35 ppb (4) N/A 7.6 μg/m3 (32) 37.0
 
Sept. 18, 2019, noon 10.5 ppb (10) -1.4 ppb (0) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.22 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
Sept. 18, 2019, 11 a.m. 7.7 ppb (7) -1.6 ppb (0) N/A 9.0 ppb (8) N/A N/A 20.0 ppb (15) 0.15 ppb (2) N/A 2.5 μg/m3 (10) 15.0
 
Sept. 18, 2019, 10 a.m. 10.4 ppb (10) -1.5 ppb (0) 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
 
Sept. 18, 2019, 9 a.m. 9.6 ppb (9) -1.6 ppb (0) N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
Sept. 18, 2019, 8 a.m. 8.6 ppb (8) -1.6 ppb (0) N/A 10.0 ppb (9) N/A N/A 22.0 ppb (17) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 7 a.m. 11.7 ppb (11) -1.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) 0.22 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
Sept. 18, 2019, 6 a.m. 13.3 ppb (12) -1.3 ppb (0) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.28 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 18, 2019, 5 a.m. 15.1 ppb (14) -1.6 ppb (0) N/A 17.0 ppb (16) N/A N/A 19.0 ppb (15) 0.17 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
Sept. 18, 2019, 4 a.m. 6.4 ppb (6) -1.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.1 ppb (1) N/A 6.2 μg/m3 (26) 26.0
 
Sept. 18, 2019, 3 a.m. 6.2 ppb (6) -1.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 38.0 ppb (29) 0.09 ppb (1) N/A 4.7 μg/m3 (20) 29.0
 
Sept. 18, 2019, 2 a.m. 4.4 ppb (4) -1.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 46.0 ppb (35) 0.08 ppb (1) N/A 7.1 μg/m3 (30) 35.0
 
Sept. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
Sept. 18, 2019, midnight 6.4 ppb (6) -1.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 61.0 ppb (47) 0.17 ppb (2) N/A 6.9 μg/m3 (29) 47.0
 
Sept. 17, 2019, 11 p.m. 6.0 ppb (6) -1.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 75.0 ppb (58) 0.24 ppb (3) N/A 6.2 μg/m3 (26) 58.0
 
Sept. 17, 2019, 10 p.m. 6.1 ppb (6) -1.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 79.0 ppb (62) 0.29 ppb (3) N/A 3.9 μg/m3 (16) 62.0
 
Sept. 17, 2019, 9 p.m. 6.6 ppb (6) -0.7 ppb (0) N/A 7.0 ppb (6) N/A N/A 72.0 ppb (56) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 56.0
 
Sept. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.3 μg/m3 (1) 1.0
 
Sept. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -0.4 μg/m3 (0) N/A
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.32 ppb (4) N/A 7.9 μg/m3 (33) 33.0
 
Sept. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.38 ppb (4) N/A 4.2 μg/m3 (18) 18.0
 
Sept. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.23 ppb (3) N/A 2.2 μg/m3 (9) 10.0
 
Sept. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.16 ppb (2) N/A 2.5 μg/m3 (10) 15.0
 
Sept. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.18 ppb (2) N/A 2.3 μg/m3 (10) 15.0
 
Sept. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.23 ppb (3) N/A 2.5 μg/m3 (10) 15.0
 
Sept. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.27 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
Sept. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.28 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
Sept. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.29 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.26 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.14 ppb (2) N/A 7.4 μg/m3 (31) 34.0
 
Sept. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.17 ppb (2) N/A 3.2 μg/m3 (13) 30.0
 
Sept. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.14 ppb (2) N/A 0.6 μg/m3 (2) 31.0
 
Sept. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.14 ppb (2) N/A 1.5 μg/m3 (6) 37.0
 
Sept. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) 0.13 ppb (1) N/A 4.9 μg/m3 (20) 44.0
 
Sept. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) 0.14 ppb (2) N/A 9.1 μg/m3 (38) 49.0
 
Sept. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (51) 0.17 ppb (2) N/A 6.2 μg/m3 (26) 51.0
 
Sept. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) 0.17 ppb (2) N/A 2.7 μg/m3 (11) 45.0
 
Sept. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.17 ppb (2) N/A 5.6 μg/m3 (23) 41.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.23 ppb (3) N/A 7.6 μg/m3 (32) 38.0
 
Sept. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.24 ppb (3) N/A 7.6 μg/m3 (32) 34.0
 
Sept. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.26 ppb (3) N/A 11.3 μg/m3 (47) 47.0
 
Sept. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.32 ppb (4) N/A 12.8 μg/m3 (52) 52.0
 
Sept. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.55 ppb (6) N/A 14.7 μg/m3 (56) 56.0
 
Sept. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.42 ppb (5) N/A 10.3 μg/m3 (43) 43.0
 
Sept. 16, 2019, noon N/A N/A N/A N/A N/A N/A 9.0 ppb (7) 0.33 ppb (4) N/A 10.9 μg/m3 (45) 45.0
 
Sept. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.28 ppb (3) N/A 8.4 μg/m3 (35) 35.0
 
Sept. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.27 ppb (3) N/A 8.9 μg/m3 (37) 37.0
 
Sept. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.3 ppb (3) N/A 10.4 μg/m3 (43) 43.0
 
Sept. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Sept. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.33 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.35 ppb (4) N/A 10.6 μg/m3 (44) 44.0
 
Sept. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.34 ppb (4) N/A 11.6 μg/m3 (48) 48.0
 
Sept. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.25 ppb (3) N/A 12.3 μg/m3 (51) 51.0
 
Sept. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.23 ppb (3) N/A 12.1 μg/m3 (50) 50.0
 
Sept. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.26 ppb (3) N/A 15.7 μg/m3 (58) 58.0
 
Sept. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (50) 0.17 ppb (2) N/A 8.6 μg/m3 (36) 50.0
 
Sept. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 72.0 ppb (56) 0.16 ppb (2) N/A 10.6 μg/m3 (44) 56.0
 
Sept. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 79.0 ppb (62) 0.18 ppb (2) N/A 12.1 μg/m3 (50) 62.0
 
Sept. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 84.0 ppb (66) 0.23 ppb (3) N/A 6.9 μg/m3 (29) 66.0
 
Sept. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 80.0 ppb (62) 0.21 ppb (2) N/A 5.4 μg/m3 (23) 62.0
 
Sept. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 81.0 ppb (63) 0.21 ppb (2) N/A 6.6 μg/m3 (28) 63.0
 
Sept. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 76.0 ppb (59) 0.25 ppb (3) N/A 7.1 μg/m3 (30) 59.0
 
Sept. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 69.0 ppb (53) 0.25 ppb (3) N/A 6.6 μg/m3 (28) 53.0
 
Sept. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) 0.2 ppb (2) N/A 6.4 μg/m3 (27) 46.0
 
Sept. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.3 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.42 ppb (5) N/A 7.6 μg/m3 (32) 32.0
 
Sept. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.34 ppb (4) N/A 8.4 μg/m3 (35) 35.0
 
Sept. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.34 ppb (4) N/A 5.9 μg/m3 (25) 25.0
 
Sept. 15, 2019, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.32 ppb (4) N/A 1.8 μg/m3 (8) 19.0
 
Sept. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.34 ppb (4) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) N/A 5.4 μg/m3 (23) 23.0
 
Sept. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.34 ppb (4) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.35 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.38 ppb (4) N/A 9.9 μg/m3 (41) 41.0
 
Sept. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.43 ppb (5) N/A 8.4 μg/m3 (35) 35.0
 
Sept. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.44 ppb (5) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.41 ppb (5) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.35 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) 0.23 ppb (3) N/A 3.4 μg/m3 (14) 39.0
 
Sept. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (50) 0.18 ppb (2) N/A 4.2 μg/m3 (18) 50.0
 
Sept. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 82.0 ppb (64) 0.19 ppb (2) N/A 7.9 μg/m3 (33) 64.0
 
Sept. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 96.0 ppb (76) 0.23 ppb (3) N/A 6.4 μg/m3 (27) 76.0
 
Sept. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 90.0 ppb (71) 0.21 ppb (2) N/A 2.7 μg/m3 (11) 71.0
 
Sept. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 81.0 ppb (63) 0.19 ppb (2) N/A 5.4 μg/m3 (23) 63.0
 
Sept. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 86.0 ppb (68) 0.21 ppb (2) N/A 8.1 μg/m3 (34) 68.0
 
Sept. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 84.0 ppb (66) 0.22 ppb (2) N/A 6.9 μg/m3 (29) 66.0
 
Sept. 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 76.0 ppb (59) 0.23 ppb (3) N/A 4.4 μg/m3 (18) 59.0
 
Sept. 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) 0.23 ppb (3) N/A 4.5 μg/m3 (19) 45.0
 
Sept. 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.47 ppb (5) N/A 9.3 μg/m3 (39) 39.0
 
Sept. 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.78 ppb (9) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.45 ppb (5) N/A 8.4 μg/m3 (35) 35.0
 
Sept. 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.33 ppb (4) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 14, 2019, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.27 ppb (3) N/A 0.9 μg/m3 (4) 16.0
 
Sept. 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.25 ppb (3) N/A 1.3 μg/m3 (5) 18.0
 
Sept. 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 0.8 μg/m3 (3) 20.0
 
Sept. 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 3.7 μg/m3 (15) 19.0
 
Sept. 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.34 ppb (4) N/A 4.5 μg/m3 (19) 19.0
 
Sept. 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.34 ppb (4) N/A 3.0 μg/m3 (12) 21.0
 
Sept. 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.37 ppb (4) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.42 ppb (5) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.39 ppb (4) N/A 4.9 μg/m3 (20) 22.0
 
Sept. 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.37 ppb (4) N/A 1.5 μg/m3 (6) 24.0
 
Sept. 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.34 ppb (4) N/A -1.4 μg/m3 (0) 35.0
 
Sept. 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) 0.19 ppb (2) N/A -2.1 μg/m3 (0) 48.0
 
Sept. 14, 2019, midnight N/A N/A N/A N/A N/A N/A 69.0 ppb (53) 0.19 ppb (2) N/A 3.7 μg/m3 (15) 53.0
 
Sept. 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 79.0 ppb (62) 0.23 ppb (3) N/A 8.1 μg/m3 (34) 62.0
 
Sept. 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 97.0 ppb (77) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 77.0
 
Sept. 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 79.0 ppb (62) 0.22 ppb (2) N/A 2.0 μg/m3 (8) 62.0
 
Sept. 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 84.0 ppb (66) 0.26 ppb (3) N/A 2.4 μg/m3 (10) 66.0
 
Sept. 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (50) 0.18 ppb (2) N/A 0.6 μg/m3 (2) 50.0
 
Sept. 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.28 ppb (3) N/A 0.8 μg/m3 (3) 38.0
 
Sept. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.25 ppb (3) N/A 4.4 μg/m3 (18) 35.0
 
Sept. 13, 2019, 3 p.m. 70.6 ppb (68) 36.2 ppb (34) N/A 34.0 ppb (31) N/A N/A 12.0 ppb (9) 0.79 ppb (9) N/A 22.4 μg/m3 (72) 72.0
 
Sept. 13, 2019, 2 p.m. 43.8 ppb (41) 16.9 ppb (16) N/A 27.0 ppb (25) N/A N/A 9.0 ppb (7) 0.61 ppb (7) N/A 8.9 μg/m3 (37) 41.0
 
Sept. 13, 2019, 1 p.m. 32.2 ppb (30) 7.9 ppb (7) N/A 24.0 ppb (22) N/A N/A 6.0 ppb (5) 0.44 ppb (5) N/A 4.3 μg/m3 (18) 30.0
 
Sept. 13, 2019, noon 19.4 ppb (18) 1.3 ppb (1) N/A 18.0 ppb (17) N/A N/A 10.0 ppb (8) 0.3 ppb (3) N/A 6.5 μg/m3 (27) 27.0
 
Sept. 13, 2019, 11 a.m. 18.0 ppb (17) 1.1 ppb (1) N/A 17.0 ppb (16) N/A N/A 13.0 ppb (10) 0.21 ppb (2) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 13, 2019, 10 a.m. 14.6 ppb (14) 1.4 ppb (1) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) 0.22 ppb (2) N/A 2.6 μg/m3 (11) 14.0
 
Sept. 13, 2019, 9 a.m. 10.7 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) 0.22 ppb (2) N/A 3.3 μg/m3 (14) 18.0
 
Sept. 13, 2019, 8 a.m. 13.0 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 13, 2019, 7 a.m. 11.8 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) 0.22 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
Sept. 13, 2019, 6 a.m. 15.7 ppb (15) 0.8 ppb (1) N/A 15.0 ppb (14) N/A N/A 19.0 ppb (15) 0.26 ppb (3) N/A 9.9 μg/m3 (41) 41.0
 
Sept. 13, 2019, 5 a.m. 26.0 ppb (24) 2.6 ppb (2) N/A 23.0 ppb (21) N/A N/A 12.0 ppb (9) 0.25 ppb (3) N/A 11.4 μg/m3 (48) 48.0
 
Sept. 13, 2019, 4 a.m. 16.5 ppb (15) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A 23.0 ppb (18) 0.25 ppb (3) N/A 12.2 μg/m3 (50) 50.0
 
Sept. 13, 2019, 3 a.m. 7.9 ppb (7) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 38.0 ppb (29) 0.17 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
Sept. 13, 2019, 2 a.m. 5.8 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (38) 0.16 ppb (2) N/A 8.7 μg/m3 (36) 38.0
 
Sept. 13, 2019, 1 a.m. 4.4 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 60.0 ppb (46) 0.18 ppb (2) N/A 7.7 μg/m3 (32) 46.0
 
Sept. 13, 2019, midnight 4.8 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 68.0 ppb (52) 0.19 ppb (2) N/A 5.2 μg/m3 (22) 52.0
 
Sept. 12, 2019, 11 p.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 78.0 ppb (61) 0.2 ppb (2) N/A 2.6 μg/m3 (11) 61.0
 
Sept. 12, 2019, 10 p.m. 4.1 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 80.0 ppb (62) 0.2 ppb (2) N/A 1.4 μg/m3 (6) 62.0
 
Sept. 12, 2019, 9 p.m. 4.9 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 81.0 ppb (63) 0.21 ppb (2) N/A 1.2 μg/m3 (5) 63.0
 
Sept. 12, 2019, 8 p.m. 4.4 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 77.0 ppb (60) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 60.0
 
Sept. 12, 2019, 7 p.m. 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 70.0 ppb (54) 0.19 ppb (2) N/A 1.6 μg/m3 (7) 54.0
 
Sept. 12, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) 0.14 ppb (2) N/A 0.7 μg/m3 (3) 45.0
 
Sept. 12, 2019, 5 p.m. 12.8 ppb (12) 2.9 ppb (3) N/A 10.0 ppb (9) N/A N/A 50.0 ppb (38) 0.22 ppb (2) N/A 7.2 μg/m3 (30) 38.0
 
Sept. 12, 2019, 4 p.m. 25.9 ppb (24) 7.8 ppb (7) N/A 18.0 ppb (17) N/A N/A 35.0 ppb (27) 0.39 ppb (4) N/A 10.4 μg/m3 (43) 43.0