AQSQID: 060410001

Site Name: San Rafael

Location: San Rafael (Montecito/Happy Valley), CA

Reporting: True, Located: True

Current AQI: 25.0

San Rafael (Montecito/Happy Valley) CA, US: 37.9722, -122.5189

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 28, 2020, 2 p.m. 13.4 ppb (12) 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 1 p.m. 13.5 ppb (12) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A 10.0 ppb (8) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 28, 2020, noon 10.4 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 7.0 ppb (5) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 28, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 28, 2020, 10 a.m. 17.9 ppb (17) 1.7 ppb (2) N/A 16.0 ppb (15) N/A N/A 5.0 ppb (4) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 28, 2020, 9 a.m. 16.6 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 7.0 ppb (5) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 8 a.m. 16.5 ppb (15) 1.5 ppb (1) N/A 15.0 ppb (14) N/A N/A 8.0 ppb (6) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 28, 2020, 7 a.m. 13.3 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 13.0 ppb (10) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 28, 2020, 6 a.m. 7.9 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 28, 2020, 5 a.m. 6.2 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 28, 2020, 4 a.m. 10.4 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 28, 2020, 3 a.m. 21.2 ppb (20) 4.3 ppb (4) N/A 17.0 ppb (16) N/A N/A 20.0 ppb (15) 0.37 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 28, 2020, 2 a.m. 13.0 ppb (12) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 28, 2020, 1 a.m. 14.9 ppb (14) 3.9 ppb (4) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.31 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 28, 2020, midnight 8.1 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 11 p.m. 5.7 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 25.0
 
Jan. 27, 2020, 10 p.m. 7.2 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 24.0
 
Jan. 27, 2020, 9 p.m. 10.4 ppb (10) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 27, 2020, 8 p.m. 10.6 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 7 p.m. 12.2 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 27, 2020, 6 p.m. 22.4 ppb (21) 7.8 ppb (7) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2020, 5 p.m. 42.6 ppb (39) 17.9 ppb (17) N/A 25.0 ppb (23) N/A N/A 7.0 ppb (5) 0.51 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 27, 2020, 4 p.m. 65.3 ppb (62) 35.8 ppb (33) N/A 30.0 ppb (28) N/A N/A 2.0 ppb (2) 0.77 ppb (9) N/A 7.0 μg/m3 (29) 62.0
 
Jan. 27, 2020, 3 p.m. 61.6 ppb (58) 35.6 ppb (33) N/A 26.0 ppb (24) N/A N/A 0.0 ppb (0) 0.74 ppb (8) N/A 5.0 μg/m3 (21) 58.0
 
Jan. 27, 2020, 2 p.m. 28.4 ppb (26) 8.2 ppb (8) N/A 20.0 ppb (19) N/A N/A 3.0 ppb (2) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 27, 2020, 1 p.m. 30.3 ppb (28) 9.1 ppb (8) N/A 21.0 ppb (19) N/A N/A 2.0 ppb (2) 0.35 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 27, 2020, noon 15.0 ppb (14) 1.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 8.0 ppb (6) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 27, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 27, 2020, 10 a.m. 5.9 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 27, 2020, 9 a.m. 8.4 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 21.0 ppb (16) 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 27, 2020, 8 a.m. 5.8 ppb (5) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 27, 2020, 7 a.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 27, 2020, 6 a.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, 5 a.m. 3.7 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 27, 2020, 4 a.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, 3 a.m. 3.9 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, 2 a.m. 4.5 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 27, 2020, 1 a.m. 6.3 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 27, 2020, midnight 6.0 ppb (6) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 26, 2020, 11 p.m. 4.1 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 29.0
 
Jan. 26, 2020, 10 p.m. 4.1 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 26, 2020, 9 p.m. 4.4 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 26, 2020, 8 p.m. 4.4 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.22 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 26, 2020, 7 p.m. 3.8 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 26, 2020, 6 p.m. 3.6 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 26, 2020, 5 p.m. 4.6 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 26, 2020, 4 p.m. 8.4 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 26, 2020, 3 p.m. 8.5 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.28 ppb (3) N/A 1.0 μg/m3 (4) 15.0
 
Jan. 26, 2020, 2 p.m. 7.5 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.26 ppb (3) N/A -2.0 μg/m3 (0) 15.0
 
Jan. 26, 2020, 1 p.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 22.0
 
Jan. 26, 2020, noon 4.5 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 26, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Jan. 26, 2020, 10 a.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 20.0
 
Jan. 26, 2020, 9 a.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 18.0
 
Jan. 26, 2020, 8 a.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 19.0
 
Jan. 26, 2020, 7 a.m. 3.7 ppb (3) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.22 ppb (2) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 26, 2020, 6 a.m. 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (16) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 26, 2020, 5 a.m. 6.1 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (15) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 26, 2020, 4 a.m. 10.0 ppb (9) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 17.0 ppb (13) 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 26, 2020, 3 a.m. 14.7 ppb (14) 0.8 ppb (1) N/A 14.0 ppb (13) N/A N/A 13.0 ppb (10) 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 26, 2020, 2 a.m. 14.1 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) 0.38 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 26, 2020, 1 a.m. 14.6 ppb (14) 0.9 ppb (1) N/A 14.0 ppb (13) N/A N/A 16.0 ppb (12) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 26, 2020, midnight 14.9 ppb (14) 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 25, 2020, 11 p.m. 14.5 ppb (13) 2.8 ppb (3) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.34 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 25, 2020, 10 p.m. 13.6 ppb (13) 3.5 ppb (3) N/A 10.0 ppb (9) N/A N/A 20.0 ppb (15) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, 9 p.m. 13.2 ppb (12) 3.8 ppb (4) N/A 9.0 ppb (8) N/A N/A 19.0 ppb (15) 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 8 p.m. 12.0 ppb (11) 3.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 7 p.m. 16.1 ppb (15) 4.9 ppb (5) N/A 11.0 ppb (10) N/A N/A 12.0 ppb (9) 0.36 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 25, 2020, 6 p.m. 15.4 ppb (14) 4.6 ppb (4) N/A 11.0 ppb (10) N/A N/A 9.0 ppb (7) 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 25, 2020, 5 p.m. 18.4 ppb (17) 6.5 ppb (6) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) 0.46 ppb (5) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 25, 2020, 4 p.m. 17.4 ppb (16) 4.5 ppb (4) N/A 13.0 ppb (12) N/A N/A 3.0 ppb (2) 0.39 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 25, 2020, 3 p.m. 19.0 ppb (18) 4.7 ppb (4) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 25, 2020, 2 p.m. 24.8 ppb (23) 6.5 ppb (6) N/A 18.0 ppb (17) N/A N/A 0.0 ppb (0) 0.37 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 25, 2020, 1 p.m. 17.9 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A 2.0 ppb (2) 0.29 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, noon 14.8 ppb (14) 0.6 ppb (1) N/A 14.0 ppb (13) N/A N/A 7.0 ppb (5) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 25, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, 10 a.m. 16.9 ppb (16) 0.5 ppb (0) N/A 16.0 ppb (15) N/A N/A 3.0 ppb (2) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 25, 2020, 9 a.m. 19.6 ppb (18) 0.9 ppb (1) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 8 a.m. 19.8 ppb (18) 1.9 ppb (2) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) 0.38 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 25, 2020, 7 a.m. 18.8 ppb (17) 5.3 ppb (5) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 25, 2020, 6 a.m. 21.0 ppb (19) 5.6 ppb (5) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) 0.48 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 25, 2020, 5 a.m. 15.9 ppb (15) 3.3 ppb (3) N/A 13.0 ppb (12) N/A N/A 4.0 ppb (3) 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 25, 2020, 4 a.m. 18.0 ppb (17) 1.4 ppb (1) N/A 17.0 ppb (16) N/A N/A 7.0 ppb (5) 0.4 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 25, 2020, 3 a.m. 18.3 ppb (17) 1.7 ppb (2) N/A 17.0 ppb (16) N/A N/A 10.0 ppb (8) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, 2 a.m. 23.7 ppb (22) 1.7 ppb (2) N/A 22.0 ppb (20) N/A N/A 9.0 ppb (7) 0.38 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 25, 2020, 1 a.m. 15.8 ppb (15) 1.5 ppb (1) N/A 14.0 ppb (13) N/A N/A 15.0 ppb (12) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 25, 2020, midnight 15.9 ppb (15) 2.1 ppb (2) N/A 14.0 ppb (13) N/A N/A 18.0 ppb (14) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 24, 2020, 11 p.m. 22.2 ppb (21) 5.3 ppb (5) N/A 17.0 ppb (16) N/A N/A 14.0 ppb (11) 0.32 ppb (4) N/A N/A 21.0
 
Jan. 24, 2020, 10 p.m. 19.7 ppb (18) 5.3 ppb (5) N/A 14.0 ppb (13) N/A N/A 17.0 ppb (13) 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, 9 p.m. 23.9 ppb (22) 9.6 ppb (9) N/A 14.0 ppb (13) N/A N/A 17.0 ppb (13) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 24, 2020, 8 p.m. 32.0 ppb (30) 15.4 ppb (14) N/A 17.0 ppb (16) N/A N/A 13.0 ppb (10) 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 24, 2020, 7 p.m. 45.0 ppb (42) 26.6 ppb (25) N/A 18.0 ppb (17) N/A N/A 8.0 ppb (6) 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2020, 6 p.m. 46.7 ppb (43) 28.5 ppb (26) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.45 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 24, 2020, 5 p.m. 32.1 ppb (30) 16.3 ppb (15) N/A 16.0 ppb (15) N/A N/A 6.0 ppb (5) 0.48 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 24, 2020, 4 p.m. 51.0 ppb (47) 31.3 ppb (29) N/A 20.0 ppb (19) N/A N/A 2.0 ppb (2) 0.76 ppb (8) N/A 8.0 μg/m3 (33) 47.0
 
Jan. 24, 2020, 3 p.m. 50.9 ppb (47) 31.7 ppb (29) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) 0.8 ppb (9) N/A 5.0 μg/m3 (21) 47.0
 
Jan. 24, 2020, 2 p.m. 49.8 ppb (46) 28.8 ppb (27) N/A 21.0 ppb (19) N/A N/A 0.0 ppb (0) 0.72 ppb (8) N/A 2.0 μg/m3 (8) 46.0
 
Jan. 24, 2020, 1 p.m. 35.6 ppb (33) 19.3 ppb (18) N/A 16.0 ppb (15) N/A N/A 0.0 ppb (0) 0.48 ppb (5) N/A 5.0 μg/m3 (21) 33.0
 
Jan. 24, 2020, noon 20.7 ppb (19) 9.0 ppb (8) N/A 12.0 ppb (11) N/A N/A 1.0 ppb (1) 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, 11 a.m. 19.3 ppb (18) 6.5 ppb (6) N/A 13.0 ppb (12) N/A N/A 0.0 ppb (0) 0.38 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 24, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 24, 2020, 9 a.m. 21.2 ppb (20) 7.0 ppb (6) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) 0.5 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, 8 a.m. 19.1 ppb (18) 5.1 ppb (5) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) 0.48 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 24, 2020, 7 a.m. 18.0 ppb (17) 3.9 ppb (4) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, 6 a.m. 19.5 ppb (18) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A 4.0 ppb (3) 0.53 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, 5 a.m. 23.6 ppb (22) 5.4 ppb (5) N/A 18.0 ppb (17) N/A N/A 3.0 ppb (2) 0.59 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 24, 2020, 4 a.m. 28.4 ppb (26) 6.1 ppb (6) N/A 22.0 ppb (20) N/A N/A 4.0 ppb (3) 0.57 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, 3 a.m. 22.2 ppb (21) 3.6 ppb (3) N/A 19.0 ppb (18) N/A N/A 11.0 ppb (8) 0.48 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 24, 2020, 2 a.m. 22.0 ppb (20) 4.5 ppb (4) N/A 17.0 ppb (16) N/A N/A 15.0 ppb (12) 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, 1 a.m. 19.9 ppb (18) 3.6 ppb (3) N/A 16.0 ppb (15) N/A N/A 16.0 ppb (12) 0.46 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 24, 2020, midnight 17.1 ppb (16) 3.9 ppb (4) N/A 13.0 ppb (12) N/A N/A 18.0 ppb (14) 0.45 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 11 p.m. 15.0 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A 21.0 ppb (16) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 10 p.m. 13.2 ppb (12) 3.2 ppb (3) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) 0.36 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 9 p.m. 10.9 ppb (10) 2.8 ppb (3) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2020, 8 p.m. 10.0 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 17.0
 
Jan. 23, 2020, 7 p.m. 8.7 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) 0.31 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 6 p.m. 24.2 ppb (22) 11.0 ppb (10) N/A 13.0 ppb (12) N/A N/A 14.0 ppb (11) 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2020, 5 p.m. 29.1 ppb (27) 11.3 ppb (10) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (8) 0.5 ppb (6) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 23, 2020, 4 p.m. 55.8 ppb (52) 32.5 ppb (30) N/A 23.0 ppb (21) N/A N/A 3.0 ppb (2) 0.78 ppb (9) N/A 7.0 μg/m3 (29) 52.0
 
Jan. 23, 2020, 3 p.m. 59.0 ppb (55) 33.8 ppb (31) N/A 25.0 ppb (23) N/A N/A 2.0 ppb (2) 0.84 ppb (9) N/A 7.0 μg/m3 (29) 55.0
 
Jan. 23, 2020, 2 p.m. 51.8 ppb (48) 29.9 ppb (28) N/A 22.0 ppb (20) N/A N/A 0.0 ppb (0) 0.72 ppb (8) N/A 7.0 μg/m3 (29) 48.0
 
Jan. 23, 2020, 1 p.m. 34.6 ppb (32) 15.0 ppb (14) N/A 20.0 ppb (19) N/A N/A 2.0 ppb (2) 0.54 ppb (6) N/A 7.0 μg/m3 (29) 32.0
 
Jan. 23, 2020, noon 23.2 ppb (21) 7.0 ppb (6) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) 0.39 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 23, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 10 a.m. 21.1 ppb (20) 7.5 ppb (7) N/A 14.0 ppb (13) N/A N/A 2.0 ppb (2) 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2020, 9 a.m. 22.9 ppb (21) 9.4 ppb (9) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 23, 2020, 8 a.m. 24.5 ppb (23) 9.1 ppb (8) N/A 15.0 ppb (14) N/A N/A 1.0 ppb (1) 0.46 ppb (5) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 23, 2020, 7 a.m. 24.4 ppb (23) 8.2 ppb (8) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) 0.5 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 6 a.m. 33.4 ppb (31) 13.8 ppb (13) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.63 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2020, 5 a.m. 28.7 ppb (27) 9.3 ppb (9) N/A 19.0 ppb (18) N/A N/A 3.0 ppb (2) 0.58 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 4 a.m. 29.4 ppb (27) 9.2 ppb (9) N/A 20.0 ppb (19) N/A N/A 5.0 ppb (4) 0.61 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2020, 3 a.m. 21.2 ppb (20) 3.0 ppb (3) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (8) 0.46 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 2 a.m. 20.5 ppb (19) 3.0 ppb (3) N/A 18.0 ppb (17) N/A N/A 14.0 ppb (11) 0.46 ppb (5) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 23, 2020, 1 a.m. 14.6 ppb (14) 1.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 23, 2020, midnight 20.8 ppb (19) 3.8 ppb (4) N/A 17.0 ppb (16) N/A N/A 25.0 ppb (19) 0.37 ppb (4) N/A 3.0 μg/m3 (12) 19.0
 
Jan. 22, 2020, 11 p.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 28.0
 
Jan. 22, 2020, 10 p.m. 10.8 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2020, 9 p.m. 11.7 ppb (11) 4.2 ppb (4) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2020, 8 p.m. 13.7 ppb (13) 5.6 ppb (5) N/A 8.0 ppb (7) N/A N/A 19.0 ppb (15) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2020, 7 p.m. 15.2 ppb (14) 6.6 ppb (6) N/A 9.0 ppb (8) N/A N/A 17.0 ppb (13) 0.39 ppb (4) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 22, 2020, 6 p.m. 15.8 ppb (15) 7.3 ppb (7) N/A 9.0 ppb (8) N/A N/A 14.0 ppb (11) 0.4 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2020, 5 p.m. 23.7 ppb (22) 10.9 ppb (10) N/A 13.0 ppb (12) N/A N/A 13.0 ppb (10) 0.47 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2020, 4 p.m. 36.6 ppb (34) 19.1 ppb (18) N/A 18.0 ppb (17) N/A N/A 4.0 ppb (3) 0.69 ppb (8) N/A 5.0 μg/m3 (21) 34.0
 
Jan. 22, 2020, 3 p.m. 37.9 ppb (35) 16.8 ppb (16) N/A 21.0 ppb (19) N/A N/A 1.0 ppb (1) 0.62 ppb (7) N/A 4.0 μg/m3 (17) 35.0
 
Jan. 22, 2020, 2 p.m. 25.7 ppb (24) 7.5 ppb (7) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.43 ppb (5) N/A 3.0 μg/m3 (12) 24.0
 
Jan. 22, 2020, 1 p.m. 18.0 ppb (17) 3.8 ppb (4) N/A 14.0 ppb (13) N/A N/A 6.0 ppb (5) 0.4 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2020, noon 10.9 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 12.0 ppb (9) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
Jan. 22, 2020, 10 a.m. 23.5 ppb (22) 6.3 ppb (6) N/A 17.0 ppb (16) N/A N/A 2.0 ppb (2) 0.37 ppb (4) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 22, 2020, 9 a.m. 14.5 ppb (13) 1.4 ppb (1) N/A 13.0 ppb (12) N/A N/A 9.0 ppb (7) 0.36 ppb (4) N/A 3.0 μg/m3 (12) 13.0
 
Jan. 22, 2020, 8 a.m. 11.3 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 12.0 ppb (9) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 22, 2020, 7 a.m. 8.3 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.32 ppb (4) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 22, 2020, 6 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 19.0
 
Jan. 22, 2020, 5 a.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
Jan. 22, 2020, 4 a.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 22, 2020, 3 a.m. 4.3 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
Jan. 22, 2020, 2 a.m. 7.0 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.31 ppb (3) N/A 1.0 μg/m3 (4) 24.0
 
Jan. 22, 2020, 1 a.m. 6.0 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 22, 2020, midnight 5.9 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 21, 2020, 11 p.m. 4.8 ppb (4) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
Jan. 21, 2020, 10 p.m. 3.8 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 27.0
 
Jan. 21, 2020, 9 p.m. 3.6 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2020, 8 p.m. 4.0 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2020, 7 p.m. 4.9 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2020, 6 p.m. 6.7 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
Jan. 21, 2020, 5 p.m. 26.0 ppb (24) 6.4 ppb (6) N/A 20.0 ppb (19) N/A N/A 17.0 ppb (13) 0.44 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2020, 4 p.m. 34.5 ppb (32) 7.4 ppb (7) N/A 27.0 ppb (25) N/A N/A 11.0 ppb (8) 0.48 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2020, 3 p.m. 18.3 ppb (17) 2.7 ppb (3) N/A 16.0 ppb (15) N/A N/A 21.0 ppb (16) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0