AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

Location: Pleasanton (Dougherty), CA

Reporting: True, Located: True

Current AQI: 46.0

Pleasanton (Dougherty) CA, US: 37.701222, -121.903019

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 7, 2020, 11 a.m. 16.9 ppb (16) 5.2 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
April 7, 2020, 9 a.m. 10.7 ppb (10) 2.3 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2020, 8 a.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
April 7, 2020, 7 a.m. 15.3 ppb (14) 3.7 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 6 a.m. 17.8 ppb (16) 4.1 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 7, 2020, 5 a.m. 14.5 ppb (13) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 4 a.m. 16.8 ppb (16) 3.4 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 3 a.m. 14.3 ppb (13) 3.6 ppb (3) N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 7, 2020, 2 a.m. 12.9 ppb (12) 4.1 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 1 a.m. 12.1 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.39 ppb (4) N/A 3.0 μg/m3 (12) 12.0
 
April 7, 2020, midnight 4.3 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A -1.0 μg/m3 (0) 4.0
 
April 6, 2020, 11 p.m. 10.0 ppb (9) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A 2.0 μg/m3 (8) 9.0
 
April 6, 2020, 10 p.m. 4.9 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
April 6, 2020, 9 p.m. 4.4 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 6, 2020, 8 p.m. 10.0 ppb (9) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 7 p.m. 33.2 ppb (31) 13.5 ppb (12) N/A 20.0 ppb (19) N/A N/A N/A 0.39 ppb (4) N/A 2.0 μg/m3 (8) 31.0
 
April 6, 2020, 6 p.m. 23.4 ppb (22) 9.7 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 22.0
 
April 6, 2020, 5 p.m. 41.2 ppb (38) 20.9 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 38.0
 
April 6, 2020, 4 p.m. 37.2 ppb (34) 17.7 ppb (16) N/A 20.0 ppb (19) N/A N/A N/A 0.38 ppb (4) N/A 7.0 μg/m3 (29) 34.0
 
April 6, 2020, 3 p.m. 38.8 ppb (36) 20.4 ppb (19) N/A 19.0 ppb (18) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 36.0
 
April 6, 2020, 2 p.m. 47.8 ppb (44) 26.6 ppb (25) N/A 21.0 ppb (19) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 44.0
 
April 6, 2020, 1 p.m. 43.7 ppb (40) 24.8 ppb (23) N/A 19.0 ppb (18) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 40.0
 
April 6, 2020, noon 37.4 ppb (35) 19.8 ppb (18) N/A 18.0 ppb (17) N/A N/A N/A 0.36 ppb (4) N/A 7.0 μg/m3 (29) 35.0
 
April 6, 2020, 11 a.m. 31.5 ppb (29) 14.4 ppb (13) N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
April 6, 2020, 10 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
 
April 6, 2020, 9 a.m. 13.0 ppb (12) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 6, 2020, 8 a.m. 17.8 ppb (16) 3.2 ppb (3) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 7 a.m. 9.4 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 6, 2020, 6 a.m. 11.8 ppb (11) 2.1 ppb (2) N/A 10.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
April 6, 2020, 5 a.m. 8.3 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 6, 2020, 4 a.m. 5.9 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
April 6, 2020, 3 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 2 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2020, 1 a.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 6, 2020, midnight 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 5, 2020, 11 p.m. 6.7 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 5, 2020, 10 p.m. 5.8 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2020, 9 p.m. 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 8 p.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 7 p.m. 4.3 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 6 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 5 p.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 5, 2020, 4 p.m. 1.9 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 3 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 2020, 2 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
April 5, 2020, 1 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
April 5, 2020, noon 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A -2.0 μg/m3 (0) 2.0
 
April 5, 2020, 11 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 5, 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 5, 2020, 9 a.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
April 5, 2020, 8 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 7 a.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 6 a.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 5 a.m. 5.2 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 4 a.m. 4.2 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 3 a.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, 2 a.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 5, 2020, 1 a.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
April 5, 2020, midnight 1.8 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 11 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
April 4, 2020, 10 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
April 4, 2020, 9 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 8 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 7 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) N/A -3.0 μg/m3 (0) 2.0
 
April 4, 2020, 6 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
April 4, 2020, 5 p.m. 3.4 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 4 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 3 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 2 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, noon 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 11 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
April 4, 2020, 10 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
 
April 4, 2020, 9 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 8 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 7 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 6 a.m. 4.7 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2020, 5 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 4 a.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 3 a.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 2 a.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.1 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 1 a.m. 2.3 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.08 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2020, midnight 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.07 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2020, 11 p.m. 5.3 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.12 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 10 p.m. 6.4 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.12 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
April 3, 2020, 9 p.m. 15.0 ppb (14) 5.6 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 14.0
 
April 3, 2020, 8 p.m. 18.6 ppb (17) 7.9 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 3, 2020, 7 p.m. 22.6 ppb (21) 10.5 ppb (10) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 6 p.m. 21.5 ppb (20) 10.0 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A 0.3 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2020, 5 p.m. 20.9 ppb (19) 9.4 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 4 p.m. 22.6 ppb (21) 9.8 ppb (9) N/A 13.0 ppb (12) N/A N/A N/A 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 3, 2020, 3 p.m. 47.6 ppb (44) 25.4 ppb (24) N/A 22.0 ppb (20) N/A N/A N/A 0.33 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
April 3, 2020, 2 p.m. 58.2 ppb (54) 32.8 ppb (30) N/A 25.0 ppb (23) N/A N/A N/A 0.38 ppb (4) N/A 10.0 μg/m3 (42) 54.0
 
April 3, 2020, 1 p.m. 54.2 ppb (50) 30.7 ppb (28) N/A 24.0 ppb (22) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 50.0
 
April 3, 2020, noon 46.9 ppb (43) 25.7 ppb (24) N/A 21.0 ppb (19) N/A N/A N/A 0.31 ppb (3) N/A 7.0 μg/m3 (29) 43.0
 
April 3, 2020, 11 a.m. 29.9 ppb (28) 14.6 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
April 3, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2020, 9 a.m. 12.5 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
April 3, 2020, 8 a.m. 17.2 ppb (16) 5.3 ppb (5) N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2020, 7 a.m. 13.8 ppb (13) 3.7 ppb (3) N/A 10.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
April 3, 2020, 6 a.m. 5.7 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2020, 5 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 4 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2020, 3 a.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2020, 2 a.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.09 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2020, 1 a.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.07 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2020, midnight 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.07 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
April 2, 2020, 11 p.m. 6.7 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.11 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
April 2, 2020, 10 p.m. 6.6 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.11 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
April 2, 2020, 9 p.m. 27.6 ppb (26) 12.2 ppb (11) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
April 2, 2020, 8 p.m. 25.2 ppb (23) 11.3 ppb (10) N/A 14.0 ppb (13) N/A N/A N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 23.0
 
April 2, 2020, 7 p.m. 29.5 ppb (27) 13.8 ppb (13) N/A 16.0 ppb (15) N/A N/A N/A 0.27 ppb (3) N/A 3.0 μg/m3 (12) 27.0
 
April 2, 2020, 6 p.m. 30.4 ppb (28) 14.6 ppb (14) N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 0.0 μg/m3 (0) 28.0
 
April 2, 2020, 5 p.m. 20.1 ppb (19) 8.2 ppb (8) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
April 2, 2020, 4 p.m. 37.6 ppb (35) 18.3 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 35.0
 
April 2, 2020, 3 p.m. 62.5 ppb (59) 42.0 ppb (39) N/A 21.0 ppb (19) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (29) 59.0
 
April 2, 2020, 2 p.m. 73.6 ppb (71) 50.9 ppb (47) N/A 23.0 ppb (21) N/A N/A N/A 0.48 ppb (5) N/A 6.0 μg/m3 (25) 71.0
 
April 2, 2020, 1 p.m. 37.5 ppb (35) 19.5 ppb (18) N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (3) N/A 7.0 μg/m3 (29) 35.0
 
April 2, 2020, noon 41.7 ppb (39) 24.7 ppb (23) N/A 17.0 ppb (16) N/A N/A N/A 0.26 ppb (3) N/A 8.0 μg/m3 (33) 39.0
 
April 2, 2020, 11 a.m. 34.5 ppb (32) 17.7 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
April 2, 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 2, 2020, 9 a.m. 6.2 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
April 2, 2020, 8 a.m. 7.2 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2020, 7 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2020, 6 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2020, 5 a.m. 4.5 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2020, 4 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
April 2, 2020, 3 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.12 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
April 2, 2020, 2 a.m. 2.4 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.08 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
April 2, 2020, 1 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.06 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2020, midnight 3.5 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.07 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
April 1, 2020, 11 p.m. 3.9 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.06 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
April 1, 2020, 10 p.m. 5.6 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.1 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
April 1, 2020, 9 p.m. 5.9 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.1 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
April 1, 2020, 8 p.m. 8.9 ppb (8) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 1, 2020, 7 p.m. 12.7 ppb (12) 4.4 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 1, 2020, 6 p.m. 295.2 ppb (137) 288.2 ppb (136) N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 137.0
 
April 1, 2020, 5 p.m. 23.0 ppb (21) 9.1 ppb (8) N/A 14.0 ppb (13) N/A N/A N/A 0.55 ppb (6) N/A N/A 21.0
 
April 1, 2020, 4 p.m. 23.8 ppb (22) 9.9 ppb (9) N/A 14.0 ppb (13) N/A N/A N/A 0.37 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
April 1, 2020, 3 p.m. 25.4 ppb (24) 9.5 ppb (9) N/A 16.0 ppb (15) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
April 1, 2020, 2 p.m. 19.5 ppb (18) 2.6 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.39 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
April 1, 2020, 1 p.m. 15.7 ppb (15) 0.9 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 1, 2020, noon 10.7 ppb (10) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 1, 2020, 11 a.m. 10.8 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 1, 2020, 10 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 1, 2020, 9 a.m. 3.7 ppb (3) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 1, 2020, 8 a.m. 5.2 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A -1.0 μg/m3 (0) 5.0
 
April 1, 2020, 7 a.m. 3.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (3) N/A -1.0 μg/m3 (0) 4.0
 
April 1, 2020, 6 a.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
April 1, 2020, 5 a.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 1, 2020, 4 a.m. 6.8 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 1, 2020, 3 a.m. 4.4 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 1, 2020, 2 a.m. 3.4 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
April 1, 2020, 1 a.m. 3.3 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
April 1, 2020, midnight 5.0 ppb (5) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (4) 5.0
 
March 31, 2020, 11 p.m. 7.1 ppb (7) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.28 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
March 31, 2020, 10 p.m. 7.7 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 31, 2020, 9 p.m. 8.9 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 31, 2020, 8 p.m. 15.6 ppb (14) 5.8 ppb (5) N/A 10.0 ppb (9) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 31, 2020, 7 p.m. 21.7 ppb (20) 9.1 ppb (8) N/A 13.0 ppb (12) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 31, 2020, 6 p.m. 24.0 ppb (22) 11.2 ppb (10) N/A 13.0 ppb (12) N/A N/A N/A 0.4 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 31, 2020, 5 p.m. 27.8 ppb (26) 13.5 ppb (12) N/A 14.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 31, 2020, 4 p.m. 40.4 ppb (37) 23.0 ppb (21) N/A 17.0 ppb (16) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 37.0
 
March 31, 2020, 3 p.m. 34.2 ppb (32) 17.6 ppb (16) N/A 17.0 ppb (16) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 32.0
 
March 31, 2020, 2 p.m. 18.4 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 2.0 μg/m3 (8) 17.0
 
March 31, 2020, 1 p.m. 34.6 ppb (32) 18.6 ppb (17) N/A 16.0 ppb (15) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 32.0
 
March 31, 2020, noon 16.3 ppb (15) 7.3 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.32 ppb (4) N/A 3.0 μg/m3 (12) 15.0