AQSQID: 060750005

Site Name: San Francisco

Location: San Francisco (Potrero Hill), CA

Reporting: True, Located: True

Current AQI: 31.0

San Francisco (Potrero Hill) CA, US: 37.7658, -122.3978

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 6, 2020, 4 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 31.0
 
April 6, 2020, 3 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 31.0
 
April 6, 2020, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
April 6, 2020, 1 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
April 6, 2020, midnight 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 30.0
 
April 5, 2020, 11 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 31.0
 
April 5, 2020, 10 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 30.0
 
April 5, 2020, 9 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.24 ppb (3) N/A 0.0 μg/m3 (0) 29.0
 
April 5, 2020, 8 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.25 ppb (3) N/A 1.0 μg/m3 (4) 28.0
 
April 5, 2020, 7 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 27.0
 
April 5, 2020, 6 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
April 5, 2020, 5 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
April 5, 2020, 4 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
April 5, 2020, 3 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
April 5, 2020, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 26.0
 
April 5, 2020, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
April 5, 2020, noon 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
April 5, 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
 
April 5, 2020, 10 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 27.0
 
April 5, 2020, 9 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 27.0
 
April 5, 2020, 8 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 27.0
 
April 5, 2020, 7 a.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 27.0
 
April 5, 2020, 6 a.m. 1.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
April 5, 2020, 5 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2020, 4 a.m. 2.8 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
April 5, 2020, 3 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.28 ppb (3) N/A 1.0 μg/m3 (4) 24.0
 
April 5, 2020, 2 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A -1.0 μg/m3 (0) 24.0
 
April 5, 2020, 1 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
April 5, 2020, midnight 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 23.0
 
April 4, 2020, 11 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 22.0
 
April 4, 2020, 10 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
April 4, 2020, 9 p.m. 3.9 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 23.0
 
April 4, 2020, 8 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) 0.26 ppb (3) N/A 0.0 μg/m3 (0) 24.0
 
April 4, 2020, 7 p.m. 5.7 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.27 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
April 4, 2020, 6 p.m. 6.0 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.28 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
April 4, 2020, 5 p.m. 8.3 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
April 4, 2020, 4 p.m. 6.5 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A 1.0 μg/m3 (4) 24.0
 
April 4, 2020, 3 p.m. 7.2 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
April 4, 2020, 2 p.m. 4.7 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 26.0
 
April 4, 2020, 1 p.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 1.0 μg/m3 (4) 26.0
 
April 4, 2020, noon 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.25 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
April 4, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
April 4, 2020, 10 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 27.0
 
April 4, 2020, 9 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
April 4, 2020, 8 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
April 4, 2020, 7 a.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 0.0 μg/m3 (0) 26.0
 
April 4, 2020, 6 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A 0.0 μg/m3 (0) 25.0
 
April 4, 2020, 5 a.m. 5.3 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 23.0
 
April 4, 2020, 4 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
April 4, 2020, 3 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 4, 2020, 2 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 1 a.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
April 4, 2020, midnight 3.5 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 3, 2020, 11 p.m. 3.7 ppb (3) 0.9 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
 
April 3, 2020, 10 p.m. 3.7 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 3, 2020, 9 p.m. 4.4 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 3, 2020, 8 p.m. 5.0 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 3, 2020, 7 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 6 p.m. 9.3 ppb (9) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
April 3, 2020, 5 p.m. 10.2 ppb (9) 3.2 ppb (3) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 22.0
 
April 3, 2020, 4 p.m. 18.3 ppb (17) 5.9 ppb (5) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
April 3, 2020, 3 p.m. 23.5 ppb (22) 8.9 ppb (8) N/A 15.0 ppb (14) N/A N/A 22.0 ppb (17) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
April 3, 2020, 2 p.m. 20.6 ppb (19) 5.6 ppb (5) N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 19.0
 
April 3, 2020, 1 p.m. 15.6 ppb (14) 0.5 ppb (0) N/A 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.31 ppb (3) N/A 2.0 μg/m3 (8) 16.0
 
April 3, 2020, noon 8.5 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 21.0
 
April 3, 2020, 11 a.m. 5.9 ppb (5) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
April 3, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 9 a.m. 3.6 ppb (3) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 3, 2020, 8 a.m. 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 3, 2020, 7 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
April 3, 2020, 6 a.m. 7.9 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 5 a.m. 7.1 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 4 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 3, 2020, 3 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
April 3, 2020, 2 a.m. 3.8 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 3, 2020, 1 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, midnight 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 2, 2020, 11 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
April 2, 2020, 10 p.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
April 2, 2020, 9 p.m. 5.8 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 24.0
 
April 2, 2020, 8 p.m. 5.0 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
April 2, 2020, 7 p.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.25 ppb (3) N/A N/A 27.0
 
April 2, 2020, 6 p.m. 5.6 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 27.0
 
April 2, 2020, 5 p.m. 10.0 ppb (9) 3.8 ppb (4) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 24.0
 
April 2, 2020, 4 p.m. 13.8 ppb (13) 5.5 ppb (5) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2020, 3 p.m. 28.6 ppb (26) 11.3 ppb (10) N/A 17.0 ppb (16) N/A N/A 18.0 ppb (14) 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 2, 2020, 2 p.m. 54.4 ppb (50) 22.1 ppb (20) N/A 32.0 ppb (30) N/A N/A 4.0 ppb (3) 0.52 ppb (6) N/A 9.0 μg/m3 (38) 50.0
 
April 2, 2020, 1 p.m. 32.4 ppb (30) 4.4 ppb (4) N/A 28.0 ppb (26) N/A N/A 4.0 ppb (3) 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
April 2, 2020, noon 29.1 ppb (27) 2.4 ppb (2) N/A 27.0 ppb (25) N/A N/A 6.0 ppb (5) 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
April 2, 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
 
April 2, 2020, 10 a.m. 12.7 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 16.0 ppb (12) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2020, 9 a.m. 13.1 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 18.0 ppb (14) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 2, 2020, 8 a.m. 8.7 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2020, 7 a.m. 8.3 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
April 2, 2020, 6 a.m. 10.5 ppb (10) 0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 2, 2020, 5 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2020, 4 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
April 2, 2020, 3 a.m. 4.2 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 2, 2020, 2 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
April 2, 2020, 1 a.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 2, 2020, midnight 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 1, 2020, 11 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 1, 2020, 10 p.m. 3.2 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 1, 2020, 9 p.m. 4.0 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
April 1, 2020, 8 p.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
April 1, 2020, 7 p.m. 3.7 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
April 1, 2020, 6 p.m. 6.4 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
April 1, 2020, 5 p.m. 7.5 ppb (7) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
April 1, 2020, 4 p.m. 9.3 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.29 ppb (3) N/A 3.0 μg/m3 (12) 26.0
 
April 1, 2020, 3 p.m. 16.3 ppb (15) 3.8 ppb (4) N/A 12.0 ppb (11) N/A N/A 25.0 ppb (19) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 1, 2020, 2 p.m. 12.4 ppb (11) 1.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 1, 2020, 1 p.m. 7.6 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 1, 2020, noon 5.5 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
April 1, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
April 1, 2020, 10 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
April 1, 2020, 9 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.23 ppb (3) N/A 1.0 μg/m3 (4) 31.0
 
April 1, 2020, 8 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.23 ppb (3) N/A 1.0 μg/m3 (4) 23.0
 
April 1, 2020, 7 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) 0.23 ppb (3) N/A 1.0 μg/m3 (4) 18.0
 
April 1, 2020, 6 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 18.0
 
April 1, 2020, 5 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.25 ppb (3) N/A 0.0 μg/m3 (0) 21.0
 
April 1, 2020, 4 a.m. 2.5 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A -2.0 μg/m3 (0) 21.0
 
April 1, 2020, 3 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
April 1, 2020, 2 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
April 1, 2020, 1 a.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
April 1, 2020, midnight 2.3 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
March 31, 2020, 11 p.m. 3.3 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 20.0
 
March 31, 2020, 10 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
March 31, 2020, 9 p.m. 5.0 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 31, 2020, 8 p.m. 5.8 ppb (5) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 21.0
 
March 31, 2020, 7 p.m. 9.3 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 0.0 μg/m3 (0) 20.0
 
March 31, 2020, 6 p.m. 10.7 ppb (10) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
March 31, 2020, 5 p.m. 7.9 ppb (7) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.33 ppb (4) N/A 2.0 μg/m3 (8) 21.0
 
March 31, 2020, 4 p.m. 7.4 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.28 ppb (3) N/A 1.0 μg/m3 (4) 20.0
 
March 31, 2020, 3 p.m. 12.1 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A 23.0 ppb (18) 0.29 ppb (3) N/A 1.0 μg/m3 (4) 18.0
 
March 31, 2020, 2 p.m. 8.0 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 20.0
 
March 31, 2020, 1 p.m. 4.3 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.26 ppb (3) N/A -2.0 μg/m3 (0) 22.0
 
March 31, 2020, noon 3.6 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.24 ppb (3) N/A -1.0 μg/m3 (0) 22.0
 
March 31, 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
 
March 31, 2020, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
March 31, 2020, 9 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
March 31, 2020, 8 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 19.0
 
March 31, 2020, 7 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
March 31, 2020, 6 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.24 ppb (3) N/A -1.0 μg/m3 (0) 22.0
 
March 31, 2020, 5 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.26 ppb (3) N/A 0.0 μg/m3 (0) 23.0
 
March 31, 2020, 4 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
March 31, 2020, 3 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
March 31, 2020, 2 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
March 31, 2020, 1 a.m. 2.7 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 27.0
 
March 31, 2020, midnight 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 26.0
 
March 30, 2020, 11 p.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.23 ppb (3) N/A 0.0 μg/m3 (0) 26.0
 
March 30, 2020, 10 p.m. 3.8 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
March 30, 2020, 9 p.m. 3.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 1.0 μg/m3 (4) 25.0
 
March 30, 2020, 8 p.m. 5.9 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
March 30, 2020, 7 p.m. 8.5 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 24.0
 
March 30, 2020, 6 p.m. 13.9 ppb (13) 3.2 ppb (3) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
March 30, 2020, 5 p.m. 9.4 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 24.0
 
March 30, 2020, 4 p.m. 8.8 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
March 30, 2020, 3 p.m. 14.7 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A N/A 25.0 ppb (19) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 19.0
 
March 30, 2020, 2 p.m. 13.6 ppb (13) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 23.0 ppb (18) 0.33 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
March 30, 2020, 1 p.m. 10.9 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.28 ppb (3) N/A 1.0 μg/m3 (4) 20.0
 
March 30, 2020, noon 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 0.0 μg/m3 (0) 24.0
 
March 30, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
March 30, 2020, 10 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 23.0
 
March 30, 2020, 9 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 23.0
 
March 30, 2020, 8 a.m. 4.2 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
March 30, 2020, 7 a.m. 4.2 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
March 30, 2020, 6 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.26 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
March 30, 2020, 5 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 28.0