ID: 972

AQSQID: 060376012

Site Name: Santa Clarita

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

Updated: April 20, 2021, 9:43 a.m.

Location: Newhall (Newhall), CA

Reporting: True, Located: True

Current AQI: 27.0

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
April 20, 2021, 8 a.m. 11.4 ppb (11) -0.9 ppb (0) N/A 12.0 ppb (12) N/A N/A 22.0 ppb (21) 0.3 ppb (4) N/A 6.4 μg/m3 (27) 27.0
 
April 20, 2021, 7 a.m. 12.3 ppb (12) -1.0 ppb (0) N/A 13.0 ppb (13) N/A N/A 25.0 ppb (24) 0.28 ppb (4) N/A 7.4 μg/m3 (31) 31.0
 
April 20, 2021, 6 a.m. 15.2 ppb (15) -1.0 ppb (0) N/A 16.0 ppb (16) N/A N/A 21.0 ppb (20) 0.34 ppb (4) N/A 10.2 μg/m3 (43) 43.0
 
April 20, 2021, 5 a.m. 12.3 ppb (12) -1.0 ppb (0) N/A 13.0 ppb (13) N/A N/A 27.0 ppb (25) 0.3 ppb (4) N/A 9.1 μg/m3 (38) 38.0
 
April 20, 2021, 4 a.m. 8.7 ppb (9) -1.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 33.0 ppb (31) 0.24 ppb (3) N/A 6.4 μg/m3 (27) 31.0
 
April 20, 2021, 3 a.m. 5.9 ppb (6) -1.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 44.0 ppb (41) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 41.0
 
April 20, 2021, 2 a.m. 4.7 ppb (5) -0.8 ppb (0) N/A 6.0 ppb (6) N/A N/A 55.0 ppb (51) 0.19 ppb (3) N/A 0.6 μg/m3 (3) 51.0
 
April 20, 2021, 1 a.m. 2.8 ppb (3) -0.8 ppb (0) N/A 4.0 ppb (4) N/A N/A 59.0 ppb (65) 0.17 ppb (3) N/A 0.1 μg/m3 (1) 65.0
 
April 20, 2021, midnight 2.0 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (65) 0.16 ppb (3) N/A 3.3 μg/m3 (14) 65.0
 
April 19, 2021, 11 p.m. 1.4 ppb (2) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 62.0 ppb (74) 0.16 ppb (3) N/A 2.4 μg/m3 (10) 74.0
 
April 19, 2021, 10 p.m. 2.0 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 65.0 ppb (84) 0.17 ppb (3) N/A 1.6 μg/m3 (7) 84.0
 
April 19, 2021, 9 p.m. 1.9 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 66.0 ppb (87) 0.17 ppb (3) N/A -0.3 μg/m3 (0) 87.0
 
April 19, 2021, 8 p.m. 1.8 ppb (2) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 61.0 ppb (71) 0.16 ppb (3) N/A 1.4 μg/m3 (6) 71.0
 
April 19, 2021, 7 p.m. 5.1 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 66.0 ppb (87) 0.21 ppb (3) N/A 3.5 μg/m3 (15) 87.0
 
April 19, 2021, 6 p.m. 1.6 ppb (2) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 61.0 ppb (71) 0.15 ppb (2) N/A -0.3 μg/m3 (0) 71.0
 
April 19, 2021, 5 p.m. 2.2 ppb (3) -0.7 ppb (0) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (65) 0.16 ppb (3) N/A -0.5 μg/m3 (0) 65.0
 
April 19, 2021, 4 p.m. 8.0 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (7) N/A N/A 50.0 ppb (47) 0.19 ppb (3) N/A 2.6 μg/m3 (11) 47.0
 
April 19, 2021, 3 p.m. 47.9 ppb (46) 18.7 ppb (18) N/A 29.0 ppb (28) N/A N/A 19.0 ppb (18) 0.58 ppb (7) N/A 5.9 μg/m3 (25) 46.0
 
April 19, 2021, 2 p.m. 45.1 ppb (43) 15.8 ppb (15) N/A 29.0 ppb (28) N/A N/A 11.0 ppb (11) 0.6 ppb (7) N/A 5.0 μg/m3 (21) 43.0
 
April 19, 2021, 1 p.m. 34.4 ppb (33) 7.9 ppb (8) N/A 27.0 ppb (26) N/A N/A 10.0 ppb (10) 0.44 ppb (5) N/A 0.7 μg/m3 (3) 33.0
 
April 19, 2021, noon 16.2 ppb (16) -0.8 ppb (0) N/A 17.0 ppb (17) N/A N/A 18.0 ppb (17) 0.31 ppb (4) N/A 2.9 μg/m3 (13) 17.0
 
April 19, 2021, 11 a.m. 8.7 ppb (9) -1.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 23.0 ppb (22) 0.22 ppb (3) N/A 7.2 μg/m3 (31) 31.0
 
April 19, 2021, 10 a.m. 11.4 ppb (11) -1.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 21.0 ppb (20) 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 19, 2021, 9 a.m. 7.8 ppb (8) -1.0 ppb (0) N/A 9.0 ppb (9) N/A N/A 27.0 ppb (25) 0.19 ppb (3) N/A 3.7 μg/m3 (16) 25.0
 
April 19, 2021, 8 a.m. 3.7 ppb (4) -1.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (31) 0.19 ppb (3) N/A 6.9 μg/m3 (29) 31.0
 
April 19, 2021, 7 a.m. 5.3 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (30) 0.22 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
April 19, 2021, 6 a.m. 7.2 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 32.0 ppb (30) 0.26 ppb (4) N/A 4.3 μg/m3 (18) 30.0
 
April 19, 2021, 5 a.m. 11.0 ppb (11) -1.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 30.0 ppb (28) 0.3 ppb (4) N/A 5.2 μg/m3 (22) 28.0
 
April 19, 2021, 4 a.m. 6.0 ppb (6) -1.1 ppb (0) N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.26 ppb (4) N/A 4.7 μg/m3 (20) 38.0
 
April 19, 2021, 3 a.m. 3.2 ppb (4) -1.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (50) 0.19 ppb (3) N/A 2.4 μg/m3 (10) 50.0
 
April 19, 2021, 2 a.m. 2.4 ppb (3) -0.9 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (51) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 51.0
 
April 19, 2021, 1 a.m. 1.5 ppb (2) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (51) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 51.0
 
April 19, 2021, midnight 0.0 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (50) 0.15 ppb (2) N/A 0.1 μg/m3 (1) 50.0
 
April 18, 2021, 11 p.m. -0.5 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (48) 0.14 ppb (2) N/A -1.5 μg/m3 (0) 48.0
 
April 18, 2021, 10 p.m. -0.6 ppb (0) -1.1 ppb (0) N/A 0.0 ppb (0) N/A N/A 51.0 ppb (48) 0.14 ppb (2) N/A -0.5 μg/m3 (0) 48.0
 
April 18, 2021, 9 p.m. -0.5 ppb (0) -1.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 50.0 ppb (47) 0.13 ppb (2) N/A -1.0 μg/m3 (0) 47.0
 
April 18, 2021, 8 p.m. -0.5 ppb (0) -1.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (46) 0.13 ppb (2) N/A -1.2 μg/m3 (0) 46.0
 
April 18, 2021, 7 p.m. -0.5 ppb (0) -1.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) 0.12 ppb (2) N/A 1.6 μg/m3 (7) 46.0
 
April 18, 2021, 6 p.m. -0.3 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.12 ppb (2) N/A 4.2 μg/m3 (18) 45.0
 
April 18, 2021, 5 p.m. -0.4 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.13 ppb (2) N/A 2.9 μg/m3 (13) 45.0
 
April 18, 2021, 4 p.m. 0.0 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.13 ppb (2) N/A 0.9 μg/m3 (4) 43.0
 
April 18, 2021, 3 p.m. 7.0 ppb (7) 1.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (36) 0.2 ppb (3) N/A 2.6 μg/m3 (11) 36.0
 
April 18, 2021, 2 p.m. 16.0 ppb (16) 4.0 ppb (4) N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) 0.39 ppb (5) N/A 3.8 μg/m3 (16) 17.0
 
April 18, 2021, 1 p.m. 6.7 ppb (7) -0.8 ppb (0) N/A 8.0 ppb (8) N/A N/A 22.0 ppb (21) 0.24 ppb (3) N/A 3.1 μg/m3 (13) 21.0
 
April 18, 2021, noon 4.7 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (22) 0.22 ppb (3) N/A 1.9 μg/m3 (8) 22.0
 
April 18, 2021, 11 a.m. 4.7 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
April 18, 2021, 10 a.m. 6.9 ppb (7) -0.8 ppb (0) N/A 8.0 ppb (8) N/A N/A 24.0 ppb (23) 0.24 ppb (3) N/A 6.5 μg/m3 (28) 28.0
 
April 18, 2021, 9 a.m. 6.0 ppb (6) -1.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 27.0 ppb (25) 0.24 ppb (3) N/A 4.5 μg/m3 (19) 25.0
 
April 18, 2021, 8 a.m. 7.3 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 27.0 ppb (25) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 18, 2021, 7 a.m. 8.7 ppb (9) -1.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 27.0 ppb (25) 0.29 ppb (4) N/A 9.4 μg/m3 (40) 40.0
 
April 18, 2021, 6 a.m. 10.4 ppb (10) -1.0 ppb (0) N/A 11.0 ppb (11) N/A N/A 26.0 ppb (25) 0.33 ppb (4) N/A 7.7 μg/m3 (33) 33.0
 
April 18, 2021, 5 a.m. 12.5 ppb (12) -1.0 ppb (0) N/A 14.0 ppb (14) N/A N/A 27.0 ppb (25) 0.35 ppb (4) N/A 8.4 μg/m3 (36) 36.0
 
April 18, 2021, 4 a.m. 9.3 ppb (9) -1.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 30.0 ppb (28) 0.28 ppb (4) N/A 11.6 μg/m3 (49) 49.0
 
April 18, 2021, 3 a.m. 5.2 ppb (5) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (35) 0.2 ppb (3) N/A 15.6 μg/m3 (59) 59.0
 
April 18, 2021, 2 a.m. 5.4 ppb (6) -1.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 48.0 ppb (45) 0.23 ppb (3) N/A 9.7 μg/m3 (41) 45.0
 
April 18, 2021, 1 a.m. 4.2 ppb (4) -0.8 ppb (0) N/A 5.0 ppb (5) N/A N/A 58.0 ppb (61) 0.18 ppb (3) N/A 13.4 μg/m3 (54) 61.0
 
April 18, 2021, midnight 5.1 ppb (5) -0.7 ppb (0) N/A 6.0 ppb (6) N/A N/A 67.0 ppb (91) 0.24 ppb (3) N/A 16.5 μg/m3 (61) 91.0
 
April 17, 2021, 11 p.m. 6.0 ppb (6) -0.6 ppb (0) N/A 7.0 ppb (7) N/A N/A 75.0 ppb (104) 0.3 ppb (4) N/A 17.2 μg/m3 (62) 104.0
 
April 17, 2021, 10 p.m. 1.4 ppb (2) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (65) 0.19 ppb (3) N/A 3.5 μg/m3 (15) 65.0
 
April 17, 2021, 9 p.m. 2.7 ppb (3) -0.8 ppb (0) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (65) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 65.0
 
April 17, 2021, 8 p.m. 3.0 ppb (3) -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (58) 0.21 ppb (3) N/A 0.1 μg/m3 (1) 58.0
 
April 17, 2021, 7 p.m. 0.2 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (48) 0.13 ppb (2) N/A 3.1 μg/m3 (13) 48.0
 
April 17, 2021, 6 p.m. 0.7 ppb (1) -0.8 ppb (0) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) 0.13 ppb (2) N/A 7.2 μg/m3 (31) 48.0
 
April 17, 2021, 5 p.m. 6.3 ppb (6) 0.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 47.0 ppb (44) 0.2 ppb (3) N/A 5.5 μg/m3 (23) 44.0
 
April 17, 2021, 4 p.m. 14.4 ppb (14) 2.8 ppb (3) N/A 12.0 ppb (12) N/A N/A 37.0 ppb (35) 0.32 ppb (4) N/A 3.7 μg/m3 (16) 35.0
 
April 17, 2021, 3 p.m. 18.7 ppb (18) 4.5 ppb (5) N/A 14.0 ppb (14) N/A N/A 26.0 ppb (25) 0.37 ppb (5) N/A 6.7 μg/m3 (28) 28.0
 
April 17, 2021, 2 p.m. 18.9 ppb (18) 4.3 ppb (5) N/A 15.0 ppb (15) N/A N/A 16.0 ppb (15) 0.38 ppb (5) N/A 10.9 μg/m3 (46) 46.0
 
April 17, 2021, 1 p.m. 14.1 ppb (14) -0.1 ppb (0) N/A 14.0 ppb (14) N/A N/A 7.0 ppb (7) 0.34 ppb (4) N/A 11.6 μg/m3 (49) 49.0
 
April 17, 2021, noon 11.9 ppb (12) -0.6 ppb (0) N/A 13.0 ppb (13) N/A N/A 9.0 ppb (9) 0.33 ppb (4) N/A 9.9 μg/m3 (42) 42.0
 
April 17, 2021, 11 a.m. 9.8 ppb (10) -0.9 ppb (0) N/A 11.0 ppb (11) N/A N/A 18.0 ppb (17) 0.28 ppb (4) N/A 9.1 μg/m3 (38) 38.0
 
April 17, 2021, 10 a.m. 13.9 ppb (14) -0.7 ppb (0) N/A 15.0 ppb (15) N/A N/A 13.0 ppb (13) 0.32 ppb (4) N/A 10.6 μg/m3 (45) 45.0
 
April 17, 2021, 9 a.m. 17.9 ppb (17) -0.6 ppb (0) N/A 19.0 ppb (18) N/A N/A 13.0 ppb (13) 0.35 ppb (4) N/A 12.6 μg/m3 (53) 53.0
 
April 17, 2021, 8 a.m. 18.3 ppb (18) -0.6 ppb (0) N/A 19.0 ppb (18) N/A N/A 15.0 ppb (14) 0.4 ppb (5) N/A 13.4 μg/m3 (54) 54.0
 
April 17, 2021, 7 a.m. 17.8 ppb (17) -0.9 ppb (0) N/A 19.0 ppb (18) N/A N/A 19.0 ppb (18) 0.39 ppb (5) N/A 11.1 μg/m3 (47) 47.0
 
April 17, 2021, 6 a.m. 15.3 ppb (15) -0.9 ppb (0) N/A 16.0 ppb (16) N/A N/A 20.0 ppb (19) 0.4 ppb (5) N/A 7.9 μg/m3 (33) 33.0
 
April 17, 2021, 5 a.m. 15.7 ppb (15) -0.9 ppb (0) N/A 17.0 ppb (17) N/A N/A 25.0 ppb (24) 0.37 ppb (5) N/A 19.2 μg/m3 (66) 66.0
 
April 17, 2021, 4 a.m. 10.5 ppb (10) -1.0 ppb (0) N/A 11.0 ppb (11) N/A N/A 33.0 ppb (31) 0.25 ppb (3) N/A 10.7 μg/m3 (45) 45.0
 
April 17, 2021, 3 a.m. 11.1 ppb (11) -1.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 41.0 ppb (38) 0.24 ppb (3) N/A 10.9 μg/m3 (46) 46.0
 
April 17, 2021, 2 a.m. 12.1 ppb (12) -0.9 ppb (0) N/A 13.0 ppb (13) N/A N/A 44.0 ppb (41) 0.24 ppb (3) N/A 13.6 μg/m3 (55) 55.0
 
April 17, 2021, 1 a.m. 8.3 ppb (8) -0.6 ppb (0) N/A 9.0 ppb (9) N/A N/A 54.0 ppb (50) 0.21 ppb (3) N/A 12.1 μg/m3 (51) 51.0
 
April 17, 2021, midnight 6.2 ppb (6) -0.5 ppb (0) N/A 7.0 ppb (7) N/A N/A 60.0 ppb (68) 0.18 ppb (3) N/A 9.7 μg/m3 (41) 68.0
 
April 16, 2021, 11 p.m. 6.9 ppb (7) -0.3 ppb (0) N/A 7.0 ppb (7) N/A N/A 64.0 ppb (81) 0.2 ppb (3) N/A 8.7 μg/m3 (37) 81.0
 
April 16, 2021, 10 p.m. 7.5 ppb (8) -0.2 ppb (0) N/A 8.0 ppb (8) N/A N/A 70.0 ppb (100) 0.23 ppb (3) N/A 15.6 μg/m3 (59) 100.0
 
April 16, 2021, 9 p.m. 8.3 ppb (8) -0.1 ppb (0) N/A 8.0 ppb (8) N/A N/A 71.0 ppb (101) 0.25 ppb (3) N/A 10.4 μg/m3 (44) 101.0
 
April 16, 2021, 8 p.m. 8.1 ppb (8) 0.1 ppb (1) N/A 8.0 ppb (8) N/A N/A 65.0 ppb (84) 0.25 ppb (3) N/A 22.6 μg/m3 (74) 84.0
 
April 16, 2021, 7 p.m. 11.2 ppb (11) 1.1 ppb (2) N/A 10.0 ppb (10) N/A N/A 57.0 ppb (58) 0.25 ppb (3) N/A 12.1 μg/m3 (51) 58.0
 
April 16, 2021, 6 p.m. 16.0 ppb (16) 2.9 ppb (3) N/A 13.0 ppb (13) N/A N/A 47.0 ppb (44) 0.31 ppb (4) N/A 15.6 μg/m3 (59) 59.0
 
April 16, 2021, 5 p.m. 14.5 ppb (14) 3.2 ppb (4) N/A 11.0 ppb (11) N/A N/A 43.0 ppb (40) 0.27 ppb (4) N/A 6.2 μg/m3 (26) 40.0
 
April 16, 2021, 4 p.m. 14.3 ppb (14) 3.0 ppb (3) N/A 11.0 ppb (11) N/A N/A 40.0 ppb (38) 0.24 ppb (3) N/A 6.9 μg/m3 (29) 38.0
 
April 16, 2021, 3 p.m. 32.1 ppb (31) 12.3 ppb (12) N/A 20.0 ppb (19) N/A N/A 17.0 ppb (16) 0.42 ppb (5) N/A 8.4 μg/m3 (36) 36.0
 
April 16, 2021, 2 p.m. 30.7 ppb (29) 10.4 ppb (10) N/A 20.0 ppb (19) N/A N/A 11.0 ppb (11) 0.48 ppb (6) N/A 7.4 μg/m3 (31) 31.0
 
April 16, 2021, 1 p.m. 22.6 ppb (22) 4.6 ppb (5) N/A 18.0 ppb (17) N/A N/A 3.0 ppb (3) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 16, 2021, noon 14.4 ppb (14) 0.1 ppb (1) N/A 14.0 ppb (14) N/A N/A 5.0 ppb (5) 0.33 ppb (4) N/A 5.7 μg/m3 (24) 24.0
 
April 16, 2021, 11 a.m. 10.5 ppb (10) -0.1 ppb (0) N/A 11.0 ppb (11) N/A N/A 9.0 ppb (9) 0.33 ppb (4) N/A 7.5 μg/m3 (32) 32.0
 
April 16, 2021, 10 a.m. 11.4 ppb (11) -0.7 ppb (0) N/A 12.0 ppb (12) N/A N/A 9.0 ppb (9) 0.3 ppb (4) N/A 11.4 μg/m3 (48) 48.0
 
April 16, 2021, 9 a.m. 11.6 ppb (11) -0.8 ppb (0) N/A 12.0 ppb (12) N/A N/A 13.0 ppb (13) 0.33 ppb (4) N/A 9.7 μg/m3 (41) 41.0
 
April 16, 2021, 8 a.m. 11.4 ppb (11) -0.8 ppb (0) N/A 12.0 ppb (12) N/A N/A 14.0 ppb (13) 0.3 ppb (4) N/A 5.2 μg/m3 (22) 22.0
 
April 16, 2021, 7 a.m. 12.3 ppb (12) -0.8 ppb (0) N/A 13.0 ppb (13) N/A N/A 14.0 ppb (13) 0.28 ppb (4) N/A 8.7 μg/m3 (37) 37.0
 
April 16, 2021, 6 a.m. 11.8 ppb (12) -0.8 ppb (0) N/A 13.0 ppb (13) N/A N/A 17.0 ppb (16) 0.27 ppb (4) N/A 11.6 μg/m3 (49) 49.0
 
April 16, 2021, 5 a.m. 6.8 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 28.0 ppb (26) 0.17 ppb (3) N/A 9.7 μg/m3 (41) 41.0
 
April 16, 2021, 4 a.m. 6.6 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 35.0 ppb (33) 0.16 ppb (3) N/A 11.4 μg/m3 (48) 48.0
 
April 16, 2021, 3 a.m. 12.9 ppb (13) -1.0 ppb (0) N/A 14.0 ppb (14) N/A N/A 33.0 ppb (31) 0.23 ppb (3) N/A 13.1 μg/m3 (54) 54.0
 
April 16, 2021, 2 a.m. 10.7 ppb (11) -0.6 ppb (0) N/A 11.0 ppb (11) N/A N/A 39.0 ppb (37) 0.21 ppb (3) N/A 13.6 μg/m3 (55) 55.0
 
April 16, 2021, 1 a.m. 7.3 ppb (7) -0.6 ppb (0) N/A 8.0 ppb (8) N/A N/A 48.0 ppb (45) 0.19 ppb (3) N/A 15.6 μg/m3 (59) 59.0
 
April 16, 2021, midnight 7.3 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 55.0 ppb (51) 0.18 ppb (3) N/A 9.2 μg/m3 (39) 51.0
 
April 15, 2021, 11 p.m. 9.1 ppb (9) 0.3 ppb (1) N/A 9.0 ppb (9) N/A N/A 60.0 ppb (68) 0.21 ppb (3) N/A 10.6 μg/m3 (45) 68.0
 
April 15, 2021, 10 p.m. 9.8 ppb (10) 0.4 ppb (1) N/A 9.0 ppb (9) N/A N/A 63.0 ppb (78) 0.25 ppb (3) N/A 17.9 μg/m3 (64) 78.0
 
April 15, 2021, 9 p.m. 13.7 ppb (13) 1.4 ppb (2) N/A 12.0 ppb (12) N/A N/A 59.0 ppb (65) 0.27 ppb (4) N/A 14.8 μg/m3 (57) 65.0
 
April 15, 2021, 8 p.m. 17.3 ppb (17) 2.9 ppb (3) N/A 14.0 ppb (14) N/A N/A 51.0 ppb (48) 0.29 ppb (4) N/A 18.4 μg/m3 (65) 65.0
 
April 15, 2021, 7 p.m. 19.0 ppb (18) 4.2 ppb (4) N/A 15.0 ppb (15) N/A N/A 43.0 ppb (40) 0.3 ppb (4) N/A 13.9 μg/m3 (55) 55.0
 
April 15, 2021, 6 p.m. 20.0 ppb (19) 5.1 ppb (5) N/A 15.0 ppb (15) N/A N/A 39.0 ppb (37) 0.28 ppb (4) N/A 15.1 μg/m3 (58) 58.0
 
April 15, 2021, 5 p.m. 5.6 ppb (6) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (45) 0.16 ppb (3) N/A 11.1 μg/m3 (47) 47.0
 
April 15, 2021, 4 p.m. 12.5 ppb (12) 2.4 ppb (3) N/A 10.0 ppb (10) N/A N/A 40.0 ppb (38) 0.21 ppb (3) N/A 11.9 μg/m3 (50) 50.0
 
April 15, 2021, 3 p.m. 29.8 ppb (29) 12.0 ppb (12) N/A 18.0 ppb (17) N/A N/A 17.0 ppb (16) 0.36 ppb (5) N/A 12.2 μg/m3 (52) 52.0
 
April 15, 2021, 2 p.m. 32.0 ppb (31) 15.5 ppb (15) N/A 17.0 ppb (17) N/A N/A 6.0 ppb (6) 0.44 ppb (5) N/A 11.2 μg/m3 (47) 47.0
 
April 15, 2021, 1 p.m. 23.7 ppb (23) 7.7 ppb (8) N/A 16.0 ppb (16) N/A N/A 2.0 ppb (2) 0.38 ppb (5) N/A 8.5 μg/m3 (36) 36.0
 
April 15, 2021, noon 16.5 ppb (16) 1.5 ppb (2) N/A 15.0 ppb (15) N/A N/A 3.0 ppb (3) 0.27 ppb (4) N/A 7.7 μg/m3 (33) 33.0
 
April 15, 2021, 11 a.m. 7.1 ppb (7) -0.8 ppb (0) N/A 8.0 ppb (8) N/A N/A 11.0 ppb (11) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 15, 2021, 10 a.m. 9.9 ppb (10) -0.8 ppb (0) N/A 11.0 ppb (11) N/A N/A 11.0 ppb (11) 0.22 ppb (3) N/A 7.2 μg/m3 (31) 31.0
 
April 15, 2021, 9 a.m. 7.0 ppb (7) -0.9 ppb (0) N/A 8.0 ppb (8) N/A N/A 16.0 ppb (15) 0.21 ppb (3) N/A 10.2 μg/m3 (43) 43.0
 
April 15, 2021, 8 a.m. 7.2 ppb (7) -0.8 ppb (0) N/A 8.0 ppb (8) N/A N/A 17.0 ppb (16) 0.23 ppb (3) N/A 10.6 μg/m3 (45) 45.0
 
April 15, 2021, 7 a.m. 7.6 ppb (8) -1.0 ppb (0) N/A 9.0 ppb (9) N/A N/A 23.0 ppb (22) 0.24 ppb (3) N/A 10.4 μg/m3 (44) 44.0
 
April 15, 2021, 6 a.m. 6.8 ppb (7) -1.0 ppb (0) N/A 8.0 ppb (8) N/A N/A 28.0 ppb (26) 0.21 ppb (3) N/A 12.3 μg/m3 (52) 52.0
 
April 15, 2021, 5 a.m. 13.8 ppb (14) -0.3 ppb (0) N/A 14.0 ppb (14) N/A N/A 32.0 ppb (30) 0.23 ppb (3) N/A 11.9 μg/m3 (50) 50.0
 
April 15, 2021, 4 a.m. 6.1 ppb (6) -1.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 41.0 ppb (38) 0.2 ppb (3) N/A 11.6 μg/m3 (49) 49.0
 
April 15, 2021, 3 a.m. 3.6 ppb (4) -1.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (42) 0.15 ppb (2) N/A 8.9 μg/m3 (38) 42.0
 
April 15, 2021, 2 a.m. 3.2 ppb (4) -0.8 ppb (0) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (45) 0.14 ppb (2) N/A 9.6 μg/m3 (40) 45.0
 
April 15, 2021, 1 a.m. 3.0 ppb (3) -0.7 ppb (0) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (47) 0.14 ppb (2) N/A 7.7 μg/m3 (33) 47.0
 
April 15, 2021, midnight 3.0 ppb (3) -0.6 ppb (0) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (50) 0.14 ppb (2) N/A 3.4 μg/m3 (15) 50.0
 
April 14, 2021, 11 p.m. 3.3 ppb (4) -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (58) 0.14 ppb (2) N/A 5.2 μg/m3 (22) 58.0
 
April 14, 2021, 10 p.m. 3.0 ppb (3) -0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (65) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 65.0
 
April 14, 2021, 9 p.m. 3.1 ppb (3) -0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.14 ppb (2) N/A 7.9 μg/m3 (33) 61.0
 
April 14, 2021, 8 p.m. 3.6 ppb (4) -0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (58) 0.14 ppb (2) N/A 9.9 μg/m3 (42) 58.0
 
April 14, 2021, 7 p.m. 3.6 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (51) 0.14 ppb (2) N/A 7.9 μg/m3 (33) 51.0
 
April 14, 2021, 6 p.m. 4.2 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.15 ppb (2) N/A 8.9 μg/m3 (38) 48.0
 
April 14, 2021, 5 p.m. 5.1 ppb (5) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (44) 0.16 ppb (3) N/A 7.7 μg/m3 (33) 44.0
 
April 14, 2021, 4 p.m. 5.0 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (42) 0.16 ppb (3) N/A 7.2 μg/m3 (31) 42.0
 
April 14, 2021, 3 p.m. 3.7 ppb (4) -0.6 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (42) 0.16 ppb (3) N/A 10.6 μg/m3 (45) 45.0
 
April 14, 2021, 2 p.m. 8.6 ppb (9) 0.2 ppb (1) N/A 8.0 ppb (8) N/A N/A 36.0 ppb (34) 0.31 ppb (4) N/A 10.4 μg/m3 (44) 44.0
 
April 14, 2021, 1 p.m. 9.0 ppb (9) -0.5 ppb (0) N/A 9.0 ppb (9) N/A N/A 28.0 ppb (26) 0.2 ppb (3) N/A 8.9 μg/m3 (38) 38.0
 
April 14, 2021, noon 4.6 ppb (5) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) 0.18 ppb (3) N/A 10.1 μg/m3 (43) 43.0
 
April 14, 2021, 11 a.m. 4.0 ppb (4) -1.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.15 ppb (2) N/A 5.9 μg/m3 (25) 34.0
 
April 14, 2021, 10 a.m. 1.5 ppb (2) -1.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) 0.15 ppb (2) N/A 4.5 μg/m3 (19) 41.0
 
April 14, 2021, 9 a.m. 3.8 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) 0.14 ppb (2) N/A 6.9 μg/m3 (29) 37.0
 
April 14, 2021, 8 a.m. 1.6 ppb (2) -1.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) 0.15 ppb (2) N/A 7.2 μg/m3 (31) 39.0
 
April 14, 2021, 7 a.m. 1.5 ppb (2) -1.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A 9.1 μg/m3 (38) 40.0
 
April 14, 2021, 6 a.m. 1.5 ppb (2) -1.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.13 ppb (2) N/A 10.4 μg/m3 (44) 44.0
 
April 14, 2021, 5 a.m. 1.9 ppb (2) -1.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.11 ppb (2) N/A 10.6 μg/m3 (45) 45.0
 
April 14, 2021, 4 a.m. 2.0 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A 14.8 μg/m3 (57) 57.0
 
April 14, 2021, 3 a.m. 2.7 ppb (3) -1.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (41) 0.13 ppb (2) N/A 12.1 μg/m3 (51) 51.0
 
April 14, 2021, 2 a.m. 5.3 ppb (5) -0.8 ppb (0) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (40) 0.14 ppb (2) N/A 11.6 μg/m3 (49) 49.0
 
April 14, 2021, 1 a.m. 5.1 ppb (5) -0.9 ppb (0) N/A 6.0 ppb (6) N/A N/A 46.0 ppb (43) 0.14 ppb (2) N/A 11.1 μg/m3 (47) 47.0
 
April 14, 2021, midnight 5.4 ppb (6) -0.8 ppb (0) N/A 6.0 ppb (6) N/A N/A 48.0 ppb (45) 0.15 ppb (2) N/A 10.9 μg/m3 (46) 46.0
 
April 13, 2021, 11 p.m. 5.1 ppb (5) -0.9 ppb (0) N/A 6.0 ppb (6) N/A N/A 50.0 ppb (47) 0.13 ppb (2) N/A 10.1 μg/m3 (43) 47.0
 
April 13, 2021, 10 p.m. 7.5 ppb (8) -0.4 ppb (0) N/A 8.0 ppb (8) N/A N/A 46.0 ppb (43) 0.14 ppb (2) N/A 16.5 μg/m3 (61) 61.0
 
April 13, 2021, 9 p.m. 7.5 ppb (8) -0.1 ppb (0) N/A 8.0 ppb (8) N/A N/A 49.0 ppb (46) 0.16 ppb (3) N/A 12.4 μg/m3 (52) 52.0
 
April 13, 2021, 8 p.m. 7.4 ppb (7) 0.2 ppb (1) N/A 7.0 ppb (7) N/A N/A 49.0 ppb (46) 0.15 ppb (2) N/A 10.1 μg/m3 (43) 46.0
 
April 13, 2021, 7 p.m. 5.8 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (42) 0.14 ppb (2) N/A 11.1 μg/m3 (47) 47.0
 
April 13, 2021, 6 p.m. 5.1 ppb (5) -0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (41) 0.14 ppb (2) N/A 12.6 μg/m3 (53) 53.0
 
April 13, 2021, 5 p.m. 7.2 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 38.0 ppb (36) 0.16 ppb (3) N/A 15.6 μg/m3 (59) 59.0
 
April 13, 2021, 4 p.m. 9.1 ppb (9) 0.1 ppb (1) N/A 9.0 ppb (9) N/A N/A 37.0 ppb (35) 0.2 ppb (3) N/A 12.6 μg/m3 (53) 53.0
 
April 13, 2021, 3 p.m. 11.8 ppb (12) 0.2 ppb (1) N/A 12.0 ppb (12) N/A N/A 32.0 ppb (30) 0.18 ppb (3) N/A 18.0 μg/m3 (64) 64.0
 
April 13, 2021, 2 p.m. 11.8 ppb (12) 0.2 ppb (1) N/A 12.0 ppb (12) N/A N/A 28.0 ppb (26) 0.2 ppb (3) N/A 13.1 μg/m3 (54) 54.0
 
April 13, 2021, 1 p.m. 8.1 ppb (8) -0.7 ppb (0) N/A 9.0 ppb (9) N/A N/A 30.0 ppb (28) 0.17 ppb (3) N/A 15.1 μg/m3 (58) 58.0
 
April 13, 2021, noon 4.2 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) 0.14 ppb (2) N/A 12.4 μg/m3 (52) 52.0
 
April 13, 2021, 11 a.m. 3.7 ppb (4) -1.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (31) 0.11 ppb (2) N/A 12.4 μg/m3 (52) 52.0
 
April 13, 2021, 10 a.m. 4.1 ppb (4) -1.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (31) 0.12 ppb (2) N/A 18.5 μg/m3 (65) 65.0
 
April 13, 2021, 9 a.m. 3.1 ppb (3) -1.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) 0.1 ppb (2) N/A 11.9 μg/m3 (50) 50.0