ID: 972

AQSQID: 060376012

Site Name: Santa Clarita

Added: April 21, 2020, 6:24 p.m.

Updated: Jan. 21, 2021, 8:32 p.m.

Location: Newhall (Newhall), CA

Reporting: True, Located: True

Current AQI: 34.0

Newhall (Newhall) CA, US: 34.3833, -118.5283

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2021, 7 p.m. 3.4 ppb (4) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.12 ppb (2) N/A 5.5 μg/m3 (23) 34.0
 
Jan. 21, 2021, 6 p.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) 0.14 ppb (2) N/A 2.8 μg/m3 (12) 30.0
 
Jan. 21, 2021, 5 p.m. 16.8 ppb (16) 6.4 ppb (7) N/A 10.0 ppb (10) N/A N/A 24.0 ppb (23) 0.18 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
Jan. 21, 2021, 4 p.m. 66.7 ppb (65) 40.4 ppb (39) N/A 26.0 ppb (25) N/A N/A 7.0 ppb (7) 0.51 ppb (6) N/A 5.5 μg/m3 (23) 65.0
 
Jan. 21, 2021, 3 p.m. 52.0 ppb (50) 28.4 ppb (27) N/A 24.0 ppb (23) N/A N/A 2.0 ppb (2) 0.45 ppb (6) N/A 2.4 μg/m3 (10) 50.0
 
Jan. 21, 2021, 2 p.m. 21.7 ppb (21) 1.6 ppb (2) N/A 20.0 ppb (19) N/A N/A 3.0 ppb (3) 0.27 ppb (4) N/A 4.5 μg/m3 (19) 21.0
 
Jan. 21, 2021, 1 p.m. 13.4 ppb (13) -0.3 ppb (0) N/A 14.0 ppb (14) N/A N/A 8.0 ppb (8) 0.2 ppb (3) N/A 3.3 μg/m3 (14) 14.0
 
Jan. 21, 2021, noon 6.8 ppb (7) -0.7 ppb (0) N/A 8.0 ppb (8) N/A N/A 13.0 ppb (13) 0.13 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
Jan. 21, 2021, 11 a.m. 6.1 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 17.0 ppb (16) 0.12 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2021, 10 a.m. 6.4 ppb (7) -0.8 ppb (0) N/A 7.0 ppb (7) N/A N/A 22.0 ppb (21) 0.13 ppb (2) N/A 4.5 μg/m3 (19) 21.0
 
Jan. 21, 2021, 9 a.m. 8.1 ppb (8) -0.8 ppb (0) N/A 9.0 ppb (9) N/A N/A 17.0 ppb (16) 0.15 ppb (2) N/A 7.2 μg/m3 (31) 31.0
 
Jan. 21, 2021, 8 a.m. 5.3 ppb (5) -0.9 ppb (0) N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.15 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Jan. 21, 2021, 7 a.m. 3.6 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (25) 0.12 ppb (2) N/A 7.7 μg/m3 (33) 33.0
 
Jan. 21, 2021, 6 a.m. 3.2 ppb (4) -0.7 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) 0.13 ppb (2) N/A 8.2 μg/m3 (35) 35.0
 
Jan. 21, 2021, 5 a.m. 3.9 ppb (4) -0.7 ppb (0) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) 0.13 ppb (2) N/A 7.4 μg/m3 (31) 31.0
 
Jan. 21, 2021, 4 a.m. 2.9 ppb (3) -0.7 ppb (0) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.11 ppb (2) N/A 5.7 μg/m3 (24) 29.0
 
Jan. 21, 2021, 3 a.m. 1.3 ppb (2) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.11 ppb (2) N/A 2.9 μg/m3 (13) 31.0
 
Jan. 21, 2021, 2 a.m. 1.2 ppb (2) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.11 ppb (2) N/A 1.6 μg/m3 (7) 32.0
 
Jan. 21, 2021, 1 a.m. 1.0 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.12 ppb (2) N/A 2.6 μg/m3 (11) 33.0
 
Jan. 21, 2021, midnight 0.5 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 3.8 μg/m3 (16) 36.0
 
Jan. 20, 2021, 11 p.m. 0.4 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.11 ppb (2) N/A 3.6 μg/m3 (16) 37.0
 
Jan. 20, 2021, 10 p.m. 0.2 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.1 ppb (2) N/A 3.3 μg/m3 (14) 37.0
 
Jan. 20, 2021, 9 p.m. 0.2 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.1 ppb (2) N/A 5.2 μg/m3 (22) 37.0
 
Jan. 20, 2021, 8 p.m. 0.5 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A 2.9 μg/m3 (13) 34.0
 
Jan. 20, 2021, 7 p.m. 0.3 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A -0.5 μg/m3 (0) 34.0
 
Jan. 20, 2021, 6 p.m. 0.2 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A -1.2 μg/m3 (0) 34.0
 
Jan. 20, 2021, 5 p.m. 0.8 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) 0.11 ppb (2) N/A 2.6 μg/m3 (11) 33.0
 
Jan. 20, 2021, 4 p.m. 1.4 ppb (2) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.12 ppb (2) N/A 1.1 μg/m3 (5) 32.0
 
Jan. 20, 2021, 3 p.m. 2.6 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.13 ppb (2) N/A -3.0 μg/m3 (0) 31.0
 
Jan. 20, 2021, 2 p.m. 0.8 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.12 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
Jan. 20, 2021, 1 p.m. 0.2 ppb (1) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) 0.12 ppb (2) N/A 6.7 μg/m3 (28) 33.0
 
Jan. 20, 2021, noon 0.1 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.12 ppb (2) N/A 1.6 μg/m3 (7) 34.0
 
Jan. 20, 2021, 11 a.m. 0.1 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A -1.0 μg/m3 (0) 34.0
 
Jan. 20, 2021, 10 a.m. -0.1 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.11 ppb (2) N/A 2.9 μg/m3 (13) 34.0
 
Jan. 20, 2021, 9 a.m. -0.3 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 20, 2021, 8 a.m. -0.4 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.12 ppb (2) N/A -0.5 μg/m3 (0) 36.0
 
Jan. 20, 2021, 7 a.m. -0.4 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.12 ppb (2) N/A 2.1 μg/m3 (9) 36.0
 
Jan. 20, 2021, 6 a.m. -0.3 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.13 ppb (2) N/A 5.9 μg/m3 (25) 36.0
 
Jan. 20, 2021, 5 a.m. 0.7 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.26 ppb (4) N/A 5.5 μg/m3 (23) 35.0
 
Jan. 20, 2021, 2 a.m. 0.3 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.12 ppb (2) N/A 6.1 μg/m3 (26) 36.0
 
Jan. 20, 2021, 1 a.m. 0.3 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.12 ppb (2) N/A 6.2 μg/m3 (26) 36.0
 
Jan. 20, 2021, midnight 0.1 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 3.5 μg/m3 (15) 36.0
 
Jan. 19, 2021, 11 p.m. -0.2 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.11 ppb (2) N/A 8.4 μg/m3 (36) 37.0
 
Jan. 19, 2021, 10 p.m. -0.2 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.12 ppb (2) N/A 12.8 μg/m3 (53) 53.0
 
Jan. 19, 2021, 9 p.m. -0.1 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 7.6 μg/m3 (32) 36.0
 
Jan. 19, 2021, 8 p.m. 0.0 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 3.5 μg/m3 (15) 36.0
 
Jan. 19, 2021, 7 p.m. -0.4 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 2.5 μg/m3 (11) 36.0
 
Jan. 19, 2021, 6 p.m. 0.4 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.12 ppb (2) N/A 3.2 μg/m3 (14) 35.0
 
Jan. 19, 2021, 5 p.m. 1.0 ppb (1) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.13 ppb (2) N/A 7.6 μg/m3 (32) 34.0
 
Jan. 19, 2021, 4 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.14 ppb (2) N/A 10.1 μg/m3 (43) 43.0
 
Jan. 19, 2021, 3 p.m. 1.1 ppb (2) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.12 ppb (2) N/A 8.9 μg/m3 (38) 38.0
 
Jan. 19, 2021, 2 p.m. 0.1 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.11 ppb (2) N/A 3.2 μg/m3 (14) 38.0
 
Jan. 19, 2021, 1 p.m. -0.3 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.11 ppb (2) N/A 4.9 μg/m3 (21) 38.0
 
Jan. 19, 2021, noon -0.6 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.1 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
Jan. 19, 2021, 11 a.m. -0.4 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.1 ppb (2) N/A 4.9 μg/m3 (21) 37.0
 
Jan. 19, 2021, 10 a.m. 0.4 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.11 ppb (2) N/A 0.8 μg/m3 (4) 35.0
 
Jan. 19, 2021, 9 a.m. 13.1 ppb (13) -0.5 ppb (0) N/A 14.0 ppb (14) N/A N/A 19.0 ppb (18) 0.2 ppb (3) N/A 1.8 μg/m3 (8) 18.0
 
Jan. 19, 2021, 8 a.m. 11.1 ppb (11) -0.7 ppb (0) N/A 12.0 ppb (12) N/A N/A 14.0 ppb (13) 0.21 ppb (3) N/A 3.7 μg/m3 (16) 16.0
 
Jan. 19, 2021, 7 a.m. 9.4 ppb (9) -0.9 ppb (0) N/A 10.0 ppb (10) N/A N/A 18.0 ppb (17) 0.19 ppb (3) N/A 6.1 μg/m3 (26) 26.0
 
Jan. 19, 2021, 6 a.m. 12.1 ppb (12) -0.9 ppb (0) N/A 13.0 ppb (13) N/A N/A 15.0 ppb (14) 0.24 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
Jan. 19, 2021, 5 a.m. 17.1 ppb (17) -0.6 ppb (0) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (11) 0.28 ppb (4) N/A 1.8 μg/m3 (8) 17.0
 
Jan. 19, 2021, 4 a.m. 23.5 ppb (23) 0.3 ppb (1) N/A 23.0 ppb (22) N/A N/A 9.0 ppb (9) 0.3 ppb (4) N/A 0.8 μg/m3 (4) 23.0
 
Jan. 19, 2021, 3 a.m. 15.2 ppb (15) -0.5 ppb (0) N/A 16.0 ppb (16) N/A N/A 18.0 ppb (17) 0.27 ppb (4) N/A 0.8 μg/m3 (4) 17.0
 
Jan. 19, 2021, 2 a.m. 14.8 ppb (14) -0.4 ppb (0) N/A 15.0 ppb (15) N/A N/A 22.0 ppb (21) 0.29 ppb (4) N/A 3.2 μg/m3 (14) 21.0
 
Jan. 19, 2021, 1 a.m. 2.7 ppb (3) -0.8 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.12 ppb (2) N/A 0.1 μg/m3 (1) 34.0
 
Jan. 19, 2021, midnight 0.2 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.1 ppb (2) N/A N/A 38.0
 
Jan. 18, 2021, 11 p.m. 0.0 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.1 ppb (2) N/A -3.5 μg/m3 (0) 38.0
 
Jan. 18, 2021, 10 p.m. 0.0 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.09 ppb (2) N/A -3.3 μg/m3 (0) 38.0
 
Jan. 18, 2021, 9 p.m. 0.0 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.09 ppb (2) N/A -3.0 μg/m3 (0) 37.0
 
Jan. 18, 2021, 8 p.m. 0.5 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.09 ppb (2) N/A 0.6 μg/m3 (3) 36.0
 
Jan. 18, 2021, 7 p.m. 0.4 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.08 ppb (2) N/A 2.9 μg/m3 (13) 36.0
 
Jan. 18, 2021, 6 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.07 ppb (2) N/A 9.3 μg/m3 (39) 39.0
 
Jan. 18, 2021, 5 p.m. 18.3 ppb (18) 7.4 ppb (7) N/A 11.0 ppb (11) N/A N/A 27.0 ppb (25) 0.18 ppb (3) N/A 4.9 μg/m3 (21) 25.0
 
Jan. 18, 2021, 4 p.m. 37.1 ppb (35) 16.0 ppb (16) N/A 21.0 ppb (20) N/A N/A 11.0 ppb (11) 0.31 ppb (4) N/A -1.5 μg/m3 (0) 35.0
 
Jan. 18, 2021, 3 p.m. 49.3 ppb (47) 22.4 ppb (22) N/A 27.0 ppb (26) N/A N/A 3.0 ppb (3) 0.39 ppb (5) N/A 1.6 μg/m3 (7) 47.0
 
Jan. 18, 2021, 2 p.m. 35.1 ppb (34) 11.6 ppb (11) N/A 24.0 ppb (23) N/A N/A 1.0 ppb (1) 0.44 ppb (5) N/A 3.1 μg/m3 (13) 34.0
 
Jan. 18, 2021, 1 p.m. 11.0 ppb (11) -0.7 ppb (0) N/A 12.0 ppb (12) N/A N/A 10.0 ppb (10) 0.22 ppb (3) N/A 2.8 μg/m3 (12) 12.0
 
Jan. 18, 2021, noon 8.2 ppb (8) -0.7 ppb (0) N/A 9.0 ppb (9) N/A N/A 12.0 ppb (12) 0.2 ppb (3) N/A 4.2 μg/m3 (18) 18.0
 
Jan. 18, 2021, 11 a.m. 8.0 ppb (8) -0.8 ppb (0) N/A 9.0 ppb (9) N/A N/A 12.0 ppb (12) 0.17 ppb (3) N/A 0.4 μg/m3 (2) 12.0
 
Jan. 18, 2021, 10 a.m. 5.9 ppb (6) -0.9 ppb (0) N/A 7.0 ppb (7) N/A N/A 16.0 ppb (15) 0.17 ppb (3) N/A -4.9 μg/m3 (0) 15.0
 
Jan. 18, 2021, 9 a.m. 7.0 ppb (7) -0.9 ppb (0) N/A 8.0 ppb (8) N/A N/A 15.0 ppb (14) 0.2 ppb (3) N/A -1.8 μg/m3 (0) 14.0
 
Jan. 18, 2021, 8 a.m. 7.3 ppb (7) -0.9 ppb (0) N/A 8.0 ppb (8) N/A N/A 17.0 ppb (16) 0.22 ppb (3) N/A 2.5 μg/m3 (11) 16.0
 
Jan. 18, 2021, 7 a.m. 9.7 ppb (10) -0.9 ppb (0) N/A 11.0 ppb (11) N/A N/A 15.0 ppb (14) 0.23 ppb (3) N/A 2.7 μg/m3 (12) 14.0
 
Jan. 18, 2021, 6 a.m. 11.9 ppb (12) -0.8 ppb (0) N/A 13.0 ppb (13) N/A N/A 13.0 ppb (13) 0.26 ppb (4) N/A 1.3 μg/m3 (6) 13.0
 
Jan. 18, 2021, 5 a.m. 13.2 ppb (13) -0.9 ppb (0) N/A 14.0 ppb (14) N/A N/A 14.0 ppb (13) 0.3 ppb (4) N/A 2.0 μg/m3 (9) 14.0
 
Jan. 18, 2021, 4 a.m. 14.1 ppb (14) -0.9 ppb (0) N/A 15.0 ppb (15) N/A N/A 13.0 ppb (13) 0.33 ppb (4) N/A 5.9 μg/m3 (25) 25.0
 
Jan. 18, 2021, 3 a.m. 17.2 ppb (17) -0.6 ppb (0) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (11) 0.36 ppb (5) N/A 2.5 μg/m3 (11) 17.0
 
Jan. 18, 2021, 2 a.m. 16.1 ppb (16) -0.5 ppb (0) N/A 17.0 ppb (17) N/A N/A 17.0 ppb (16) 0.42 ppb (5) N/A 0.1 μg/m3 (1) 17.0
 
Jan. 18, 2021, 1 a.m. 6.8 ppb (7) -0.3 ppb (0) N/A 7.0 ppb (7) N/A N/A 31.0 ppb (29) 0.18 ppb (3) N/A 2.7 μg/m3 (12) 29.0
 
Jan. 18, 2021, midnight 0.3 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.1 ppb (2) N/A N/A 38.0
 
Jan. 17, 2021, 11 p.m. 0.2 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A N/A 39.0
 
Jan. 17, 2021, 10 p.m. 0.4 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A 1.1 μg/m3 (5) 39.0
 
Jan. 17, 2021, 9 p.m. 0.4 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) 0.11 ppb (2) N/A 5.9 μg/m3 (25) 39.0
 
Jan. 17, 2021, 8 p.m. -0.2 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.1 ppb (2) N/A -4.0 μg/m3 (0) 38.0
 
Jan. 17, 2021, 7 p.m. -0.3 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.1 ppb (2) N/A N/A 38.0
 
Jan. 17, 2021, 6 p.m. -0.4 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.09 ppb (2) N/A 7.8 μg/m3 (33) 38.0
 
Jan. 17, 2021, 5 p.m. 0.6 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.1 ppb (2) N/A 1.3 μg/m3 (6) 37.0
 
Jan. 17, 2021, 4 p.m. 2.8 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.13 ppb (2) N/A 2.2 μg/m3 (10) 31.0
 
Jan. 17, 2021, 3 p.m. 2.5 ppb (3) -0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.12 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
Jan. 17, 2021, 2 p.m. 1.1 ppb (2) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.1 ppb (2) N/A 1.7 μg/m3 (8) 32.0
 
Jan. 17, 2021, 1 p.m. 1.9 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.11 ppb (2) N/A -0.6 μg/m3 (0) 31.0
 
Jan. 17, 2021, noon 2.0 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.1 ppb (2) N/A -3.0 μg/m3 (0) 31.0
 
Jan. 17, 2021, 11 a.m. 0.7 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.11 ppb (2) N/A -0.1 μg/m3 (0) 31.0
 
Jan. 17, 2021, 10 a.m. 3.4 ppb (4) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.11 ppb (2) N/A 0.6 μg/m3 (3) 30.0
 
Jan. 17, 2021, 9 a.m. 1.3 ppb (2) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.1 ppb (2) N/A 1.6 μg/m3 (7) 32.0
 
Jan. 17, 2021, 8 a.m. 3.4 ppb (4) -0.9 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) 0.13 ppb (2) N/A 2.2 μg/m3 (10) 28.0
 
Jan. 17, 2021, 7 a.m. 5.2 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (25) 0.13 ppb (2) N/A -0.1 μg/m3 (0) 25.0
 
Jan. 17, 2021, 6 a.m. 9.1 ppb (9) -0.5 ppb (0) N/A 10.0 ppb (10) N/A N/A 20.0 ppb (19) 0.19 ppb (3) N/A -0.3 μg/m3 (0) 19.0
 
Jan. 17, 2021, 5 a.m. 13.5 ppb (13) -0.5 ppb (0) N/A 14.0 ppb (14) N/A N/A 18.0 ppb (17) 0.22 ppb (3) N/A 21.8 μg/m3 (72) 72.0
 
Jan. 17, 2021, 4 a.m. 15.3 ppb (15) -0.2 ppb (0) N/A 16.0 ppb (16) N/A N/A 17.0 ppb (16) 0.3 ppb (4) N/A 3.7 μg/m3 (16) 16.0
 
Jan. 17, 2021, 3 a.m. 11.3 ppb (11) -0.7 ppb (0) N/A 12.0 ppb (12) N/A N/A 22.0 ppb (21) 0.23 ppb (3) N/A 10.1 μg/m3 (43) 43.0
 
Jan. 17, 2021, 2 a.m. 3.5 ppb (4) -0.7 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.13 ppb (2) N/A 5.4 μg/m3 (23) 30.0
 
Jan. 17, 2021, 1 a.m. 0.7 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.09 ppb (2) N/A -0.1 μg/m3 (0) 35.0
 
Jan. 17, 2021, midnight -0.1 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.08 ppb (2) N/A -3.3 μg/m3 (0) 37.0
 
Jan. 16, 2021, 11 p.m. -0.3 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.08 ppb (2) N/A 1.1 μg/m3 (5) 37.0
 
Jan. 16, 2021, 10 p.m. 0.0 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.08 ppb (2) N/A -0.1 μg/m3 (0) 38.0
 
Jan. 16, 2021, 9 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.08 ppb (2) N/A -4.5 μg/m3 (0) 38.0
 
Jan. 16, 2021, 8 p.m. -0.1 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.08 ppb (2) N/A 7.6 μg/m3 (32) 38.0
 
Jan. 16, 2021, 7 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.07 ppb (2) N/A 5.4 μg/m3 (23) 38.0
 
Jan. 16, 2021, 6 p.m. 0.6 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.07 ppb (2) N/A -0.8 μg/m3 (0) 37.0
 
Jan. 16, 2021, 5 p.m. 7.8 ppb (8) 2.4 ppb (3) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) 0.13 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 16, 2021, 4 p.m. 43.6 ppb (42) 19.5 ppb (19) N/A 24.0 ppb (23) N/A N/A 9.0 ppb (9) 0.68 ppb (8) N/A 2.1 μg/m3 (9) 42.0
 
Jan. 16, 2021, 3 p.m. 26.1 ppb (25) 6.8 ppb (7) N/A 19.0 ppb (18) N/A N/A 6.0 ppb (6) 0.33 ppb (4) N/A 0.6 μg/m3 (3) 25.0
 
Jan. 16, 2021, 2 p.m. 16.1 ppb (16) 0.9 ppb (1) N/A 15.0 ppb (15) N/A N/A 8.0 ppb (8) 0.23 ppb (3) N/A 1.4 μg/m3 (6) 16.0
 
Jan. 16, 2021, 1 p.m. 11.3 ppb (11) -0.6 ppb (0) N/A 12.0 ppb (12) N/A N/A 10.0 ppb (10) 0.18 ppb (3) N/A 2.6 μg/m3 (11) 12.0
 
Jan. 16, 2021, noon 8.7 ppb (9) -0.6 ppb (0) N/A 9.0 ppb (9) N/A N/A 11.0 ppb (11) 0.16 ppb (3) N/A -0.8 μg/m3 (0) 11.0
 
Jan. 16, 2021, 11 a.m. 14.4 ppb (14) 0.1 ppb (1) N/A 14.0 ppb (14) N/A N/A 8.0 ppb (8) 0.19 ppb (3) N/A -2.8 μg/m3 (0) 14.0
 
Jan. 16, 2021, 10 a.m. 14.2 ppb (14) 1.2 ppb (2) N/A 13.0 ppb (13) N/A N/A 10.0 ppb (10) 0.22 ppb (3) N/A -0.6 μg/m3 (0) 14.0
 
Jan. 16, 2021, 9 a.m. 11.0 ppb (11) -0.8 ppb (0) N/A 12.0 ppb (12) N/A N/A 12.0 ppb (12) 0.25 ppb (3) N/A 0.1 μg/m3 (1) 12.0
 
Jan. 16, 2021, 8 a.m. 13.1 ppb (13) -0.6 ppb (0) N/A 14.0 ppb (14) N/A N/A 9.0 ppb (9) 0.27 ppb (4) N/A 1.8 μg/m3 (8) 14.0
 
Jan. 16, 2021, 7 a.m. 15.8 ppb (15) -0.5 ppb (0) N/A 16.0 ppb (16) N/A N/A 9.0 ppb (9) 0.3 ppb (4) N/A 3.0 μg/m3 (13) 16.0
 
Jan. 16, 2021, 6 a.m. 12.9 ppb (13) -0.5 ppb (0) N/A 13.0 ppb (13) N/A N/A 12.0 ppb (12) 0.24 ppb (3) N/A 3.2 μg/m3 (14) 14.0
 
Jan. 16, 2021, 5 a.m. 27.4 ppb (26) 5.1 ppb (5) N/A 22.0 ppb (21) N/A N/A 7.0 ppb (7) 0.35 ppb (4) N/A 16.2 μg/m3 (60) 60.0
 
Jan. 16, 2021, 4 a.m. 18.9 ppb (18) -0.5 ppb (0) N/A 19.0 ppb (18) N/A N/A 11.0 ppb (11) 0.27 ppb (4) N/A 5.9 μg/m3 (25) 25.0
 
Jan. 16, 2021, 3 a.m. 24.2 ppb (23) -0.1 ppb (0) N/A 24.0 ppb (23) N/A N/A 11.0 ppb (11) 0.33 ppb (4) N/A N/A 23.0
 
Jan. 16, 2021, 2 a.m. 16.5 ppb (16) -0.1 ppb (0) N/A 17.0 ppb (17) N/A N/A 21.0 ppb (20) 0.28 ppb (4) N/A N/A 20.0
 
Jan. 16, 2021, 1 a.m. 3.4 ppb (4) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) 0.13 ppb (2) N/A -3.0 μg/m3 (0) 33.0
 
Jan. 16, 2021, midnight 2.0 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A -2.1 μg/m3 (0) 36.0
 
Jan. 15, 2021, 11 p.m. 0.8 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.1 ppb (2) N/A -2.8 μg/m3 (0) 38.0
 
Jan. 15, 2021, 10 p.m. 0.7 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.09 ppb (2) N/A -1.8 μg/m3 (0) 38.0
 
Jan. 15, 2021, 9 p.m. 0.3 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.09 ppb (2) N/A 0.1 μg/m3 (1) 38.0
 
Jan. 15, 2021, 8 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.08 ppb (2) N/A -2.3 μg/m3 (0) 38.0
 
Jan. 15, 2021, 7 p.m. 0.1 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.09 ppb (2) N/A N/A 38.0
 
Jan. 15, 2021, 6 p.m. 0.1 ppb (1) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 38.0
 
Jan. 15, 2021, 5 p.m. 1.6 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.11 ppb (2) N/A 5.9 μg/m3 (25) 35.0
 
Jan. 15, 2021, 4 p.m. 6.1 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) 0.14 ppb (2) N/A 3.2 μg/m3 (14) 29.0
 
Jan. 15, 2021, 3 p.m. 5.0 ppb (5) 0.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) 0.16 ppb (3) N/A 1.3 μg/m3 (6) 30.0
 
Jan. 15, 2021, 2 p.m. 2.7 ppb (3) -0.6 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.12 ppb (2) N/A 0.6 μg/m3 (3) 30.0
 
Jan. 15, 2021, 1 p.m. 0.7 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.1 ppb (2) N/A 0.3 μg/m3 (2) 32.0
 
Jan. 15, 2021, noon 0.4 ppb (1) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) 0.1 ppb (2) N/A -1.8 μg/m3 (0) 33.0
 
Jan. 15, 2021, 11 a.m. 1.4 ppb (2) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 15, 2021, 10 a.m. 3.8 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (24) 0.12 ppb (2) N/A -2.8 μg/m3 (0) 24.0
 
Jan. 15, 2021, 9 a.m. 6.2 ppb (6) -1.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 23.0 ppb (22) 0.14 ppb (2) N/A N/A 22.0
 
Jan. 15, 2021, 8 a.m. 7.3 ppb (7) -0.9 ppb (0) N/A 8.0 ppb (8) N/A N/A 19.0 ppb (18) 0.17 ppb (3) N/A -0.1 μg/m3 (0) 18.0
 
Jan. 15, 2021, 7 a.m. 2.3 ppb (3) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (28) 0.11 ppb (2) N/A 14.7 μg/m3 (57) 57.0
 
Jan. 15, 2021, 6 a.m. 1.6 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.1 ppb (2) N/A 12.3 μg/m3 (52) 52.0
 
Jan. 15, 2021, 5 a.m. 3.5 ppb (4) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) 0.1 ppb (2) N/A 9.1 μg/m3 (38) 38.0
 
Jan. 15, 2021, 4 a.m. 5.8 ppb (6) -0.6 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (28) 0.12 ppb (2) N/A 2.2 μg/m3 (10) 28.0
 
Jan. 15, 2021, 3 a.m. 7.1 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 28.0 ppb (26) 0.15 ppb (2) N/A 3.7 μg/m3 (16) 26.0
 
Jan. 15, 2021, 2 a.m. 5.3 ppb (5) -0.9 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (29) 0.16 ppb (3) N/A 5.7 μg/m3 (24) 29.0
 
Jan. 15, 2021, 1 a.m. 3.1 ppb (3) -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.15 ppb (2) N/A 3.7 μg/m3 (16) 34.0
 
Jan. 15, 2021, midnight 2.4 ppb (3) -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) 0.11 ppb (2) N/A 16.2 μg/m3 (60) 60.0
 
Jan. 14, 2021, 11 p.m. 1.6 ppb (2) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.11 ppb (2) N/A -2.1 μg/m3 (0) 37.0
 
Jan. 14, 2021, 10 p.m. 0.8 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.11 ppb (2) N/A -2.5 μg/m3 (0) 38.0
 
Jan. 14, 2021, 9 p.m. 0.4 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.1 ppb (2) N/A 0.1 μg/m3 (1) 38.0
 
Jan. 14, 2021, 8 p.m. 0.8 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.09 ppb (2) N/A 6.8 μg/m3 (29) 37.0
 
Jan. 14, 2021, 7 p.m. 0.8 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) 0.09 ppb (2) N/A 5.6 μg/m3 (24) 36.0
 
Jan. 14, 2021, 6 p.m. 0.6 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.07 ppb (2) N/A -3.5 μg/m3 (0) 35.0