ID: 2975

AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

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

Updated: April 11, 2021, 6:43 a.m.

Location: Pleasanton (Dougherty), CA

Reporting: True, Located: True

Current AQI: 38.0

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 4, 2021, 5 a.m. 9.8 ppb (10) 2.3 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 4, 2021, 4 a.m. 6.0 ppb (6) 1.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 4, 2021, 3 a.m. 6.4 ppb (7) 1.4 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 2 a.m. 8.2 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.37 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
April 4, 2021, 1 a.m. 8.5 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2021, midnight 9.1 ppb (9) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2021, 11 p.m. 8.1 ppb (8) 2.5 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 3, 2021, 10 p.m. 9.7 ppb (10) 3.3 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2021, 9 p.m. 9.1 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 3, 2021, 8 p.m. 7.1 ppb (7) 2.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 3, 2021, 7 p.m. 11.0 ppb (11) 4.2 ppb (4) N/A 7.0 ppb (7) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 6 p.m. 6.6 ppb (7) 2.2 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 3, 2021, 5 p.m. 8.3 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2021, 4 p.m. 6.3 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, 3 p.m. 5.2 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
April 3, 2021, 2 p.m. 11.1 ppb (11) 3.1 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.3 ppb (4) N/A N/A 11.0
 
April 3, 2021, 1 p.m. 3.5 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 3, 2021, noon 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 3, 2021, 11 a.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 3, 2021, 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 (34) 34.0
 
April 3, 2021, 9 a.m. 3.4 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
April 3, 2021, 8 a.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 3, 2021, 7 a.m. 5.4 ppb (6) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 3, 2021, 6 a.m. 5.1 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2021, 5 a.m. 3.7 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 3, 2021, 4 a.m. 5.2 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 3, 2021, 3 a.m. 8.6 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 3, 2021, 2 a.m. 11.7 ppb (12) 2.9 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.27 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2021, 1 a.m. 15.2 ppb (15) 3.7 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 3, 2021, midnight 15.7 ppb (15) 3.9 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 2, 2021, 11 p.m. 22.5 ppb (22) 6.5 ppb (7) N/A 16.0 ppb (16) N/A N/A N/A 0.45 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 2, 2021, 10 p.m. 28.0 ppb (27) 9.0 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.39 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 2, 2021, 9 p.m. 28.9 ppb (28) 9.8 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 2, 2021, 8 p.m. 31.9 ppb (31) 10.2 ppb (10) N/A 22.0 ppb (21) N/A N/A N/A 0.39 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 2, 2021, 7 p.m. 37.8 ppb (36) 14.0 ppb (14) N/A 24.0 ppb (23) N/A N/A N/A 0.5 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
April 2, 2021, 6 p.m. 47.9 ppb (46) 20.0 ppb (19) N/A 28.0 ppb (27) N/A N/A N/A 0.59 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
April 2, 2021, 5 p.m. 47.2 ppb (45) 20.1 ppb (19) N/A 27.0 ppb (26) N/A N/A N/A 0.6 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
April 2, 2021, 4 p.m. 66.9 ppb (65) 33.3 ppb (32) N/A 34.0 ppb (33) N/A N/A N/A 0.6 ppb (7) N/A 7.0 μg/m3 (30) 65.0
 
April 2, 2021, 3 p.m. 29.9 ppb (29) 10.3 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 29.0
 
April 2, 2021, 2 p.m. 69.1 ppb (68) 35.8 ppb (34) N/A 33.0 ppb (32) N/A N/A N/A 0.6 ppb (7) N/A 7.0 μg/m3 (30) 68.0
 
April 2, 2021, 1 p.m. 62.5 ppb (61) 31.2 ppb (30) N/A 31.0 ppb (30) N/A N/A N/A 0.52 ppb (6) N/A 9.0 μg/m3 (38) 61.0
 
April 2, 2021, noon 58.1 ppb (56) 28.4 ppb (27) N/A 30.0 ppb (29) N/A N/A N/A 0.54 ppb (6) N/A 11.0 μg/m3 (46) 56.0
 
April 2, 2021, 11 a.m. 23.8 ppb (23) 6.6 ppb (7) N/A 17.0 ppb (17) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2021, 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 2, 2021, 9 a.m. 20.0 ppb (19) 3.5 ppb (4) N/A 17.0 ppb (17) N/A N/A N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2021, 8 a.m. 17.3 ppb (17) 4.0 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 2, 2021, 7 a.m. 22.0 ppb (21) 4.7 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 2, 2021, 6 a.m. 14.2 ppb (14) 1.7 ppb (2) N/A 13.0 ppb (13) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 2, 2021, 5 a.m. 11.9 ppb (12) 0.7 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 2, 2021, 4 a.m. 12.0 ppb (12) 0.5 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 2, 2021, 3 a.m. 12.0 ppb (12) 0.6 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 2, 2021, 2 a.m. 21.1 ppb (20) 4.1 ppb (4) N/A 17.0 ppb (17) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
April 2, 2021, 1 a.m. 11.3 ppb (11) 1.7 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.3 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 2, 2021, midnight 17.7 ppb (17) 3.3 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 1, 2021, 11 p.m. 11.2 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 1, 2021, 10 p.m. 8.5 ppb (9) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 1, 2021, 9 p.m. 14.0 ppb (14) 3.8 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 1, 2021, 8 p.m. 11.0 ppb (11) 2.7 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 1, 2021, 7 p.m. 33.3 ppb (32) 10.2 ppb (10) N/A 23.0 ppb (22) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 32.0
 
April 1, 2021, 6 p.m. 43.7 ppb (42) 15.7 ppb (15) N/A 28.0 ppb (27) N/A N/A N/A 0.49 ppb (6) N/A 4.0 μg/m3 (17) 42.0
 
April 1, 2021, 5 p.m. 29.1 ppb (28) 9.8 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 1, 2021, 4 p.m. 52.0 ppb (50) 24.6 ppb (24) N/A 27.0 ppb (26) N/A N/A N/A 0.54 ppb (6) N/A 6.0 μg/m3 (25) 50.0
 
April 1, 2021, 3 p.m. 94.6 ppb (95) 58.9 ppb (57) N/A 36.0 ppb (34) N/A N/A N/A 0.75 ppb (10) N/A 6.0 μg/m3 (25) 95.0
 
April 1, 2021, 2 p.m. 79.9 ppb (79) 47.2 ppb (45) N/A 33.0 ppb (32) N/A N/A N/A 0.68 ppb (8) N/A 2.0 μg/m3 (9) 79.0
 
April 1, 2021, 1 p.m. 59.7 ppb (58) 30.7 ppb (29) N/A 29.0 ppb (28) N/A N/A N/A 0.47 ppb (6) N/A 2.0 μg/m3 (9) 58.0
 
April 1, 2021, noon 49.7 ppb (47) 22.9 ppb (22) N/A 27.0 ppb (26) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (13) 47.0
 
April 1, 2021, 11 a.m. 36.7 ppb (35) 13.7 ppb (13) N/A 23.0 ppb (22) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 35.0
 
April 1, 2021, 10 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, 2021, 9 a.m. 24.1 ppb (23) 8.3 ppb (8) N/A 16.0 ppb (16) N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
April 1, 2021, 8 a.m. 18.1 ppb (18) 3.9 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 1, 2021, 7 a.m. 21.2 ppb (20) 5.0 ppb (5) N/A 16.0 ppb (16) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 1, 2021, 6 a.m. 14.8 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 1, 2021, 5 a.m. 28.7 ppb (28) 6.0 ppb (6) N/A 23.0 ppb (22) N/A N/A N/A 0.38 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 1, 2021, 4 a.m. 29.2 ppb (28) 5.4 ppb (6) N/A 24.0 ppb (23) N/A N/A N/A 0.48 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 1, 2021, 3 a.m. 30.6 ppb (29) 4.5 ppb (5) N/A 26.0 ppb (25) N/A N/A N/A 0.54 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
April 1, 2021, 2 a.m. 24.0 ppb (23) 5.0 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A 0.57 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
April 1, 2021, 1 a.m. 16.6 ppb (16) 3.3 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.39 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 1, 2021, midnight 15.0 ppb (15) 3.5 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 31, 2021, 11 p.m. 13.8 ppb (14) 3.7 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 31, 2021, 10 p.m. 16.8 ppb (16) 5.5 ppb (6) N/A 11.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (13) 16.0
 
March 31, 2021, 9 p.m. 6.8 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
March 31, 2021, 8 p.m. 16.2 ppb (16) 5.1 ppb (5) N/A 11.0 ppb (11) N/A N/A N/A 0.3 ppb (4) N/A 3.0 μg/m3 (13) 16.0
 
March 31, 2021, 7 p.m. 16.5 ppb (16) 6.3 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 31, 2021, 6 p.m. 26.1 ppb (25) 10.5 ppb (10) N/A 16.0 ppb (16) N/A N/A N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
March 31, 2021, 5 p.m. 42.6 ppb (41) 20.0 ppb (19) N/A 23.0 ppb (22) N/A N/A N/A 0.39 ppb (5) N/A 4.0 μg/m3 (17) 41.0
 
March 31, 2021, 4 p.m. 79.6 ppb (79) 47.1 ppb (45) N/A 33.0 ppb (32) N/A N/A N/A 0.63 ppb (7) N/A 6.0 μg/m3 (25) 79.0
 
March 31, 2021, 3 p.m. 85.3 ppb (85) 52.6 ppb (50) N/A 33.0 ppb (32) N/A N/A N/A 0.67 ppb (8) N/A 8.0 μg/m3 (34) 85.0
 
March 31, 2021, 2 p.m. 80.2 ppb (79) 48.0 ppb (46) N/A 32.0 ppb (31) N/A N/A N/A 0.64 ppb (7) N/A 8.0 μg/m3 (34) 79.0
 
March 31, 2021, 1 p.m. 67.4 ppb (66) 33.9 ppb (32) N/A 33.0 ppb (32) N/A N/A N/A 0.51 ppb (6) N/A 2.0 μg/m3 (9) 66.0
 
March 31, 2021, noon 58.2 ppb (56) 27.7 ppb (27) N/A 31.0 ppb (30) N/A N/A N/A 0.45 ppb (6) N/A 4.0 μg/m3 (17) 56.0
 
March 31, 2021, 11 a.m. 25.1 ppb (24) 7.4 ppb (7) N/A 18.0 ppb (17) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
March 31, 2021, 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 (13) 13.0
 
March 31, 2021, 9 a.m. 28.2 ppb (27) 5.6 ppb (6) N/A 23.0 ppb (22) N/A N/A N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 31, 2021, 8 a.m. 18.6 ppb (18) 2.9 ppb (3) N/A 16.0 ppb (16) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 31, 2021, 7 a.m. 11.7 ppb (12) 1.5 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 31, 2021, 6 a.m. 18.3 ppb (18) 2.7 ppb (3) N/A 16.0 ppb (16) N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 18.0
 
March 31, 2021, 5 a.m. 19.4 ppb (19) 2.8 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 19.0
 
March 31, 2021, 4 a.m. 14.9 ppb (15) 1.2 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.22 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 31, 2021, 3 a.m. 23.7 ppb (23) 5.7 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 23.0
 
March 31, 2021, 2 a.m. 27.6 ppb (27) 8.4 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.46 ppb (6) N/A 4.0 μg/m3 (17) 27.0
 
March 31, 2021, 1 a.m. 23.3 ppb (22) 9.0 ppb (9) N/A 14.0 ppb (14) N/A N/A N/A 0.51 ppb (6) N/A 1.0 μg/m3 (5) 22.0
 
March 31, 2021, midnight 19.0 ppb (18) 7.5 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 1.0 μg/m3 (5) 18.0
 
March 30, 2021, 11 p.m. 24.1 ppb (23) 10.6 ppb (10) N/A 14.0 ppb (14) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 23.0
 
March 30, 2021, 10 p.m. 29.6 ppb (28) 12.9 ppb (13) N/A 17.0 ppb (17) N/A N/A N/A 0.32 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
March 30, 2021, 9 p.m. 30.8 ppb (30) 13.5 ppb (13) N/A 17.0 ppb (17) N/A N/A N/A 0.37 ppb (5) N/A 3.0 μg/m3 (13) 30.0
 
March 30, 2021, 8 p.m. 37.4 ppb (36) 17.2 ppb (17) N/A 20.0 ppb (19) N/A N/A N/A 0.36 ppb (5) N/A 1.0 μg/m3 (5) 36.0
 
March 30, 2021, 7 p.m. 33.4 ppb (32) 15.0 ppb (15) N/A 18.0 ppb (17) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (5) 32.0
 
March 30, 2021, 6 p.m. 38.9 ppb (37) 17.9 ppb (17) N/A 21.0 ppb (20) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 37.0
 
March 30, 2021, 5 p.m. 31.0 ppb (30) 13.7 ppb (13) N/A 17.0 ppb (17) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 30, 2021, 4 p.m. 44.3 ppb (42) 19.2 ppb (19) N/A 25.0 ppb (24) N/A N/A N/A 0.27 ppb (4) N/A N/A 42.0
 
March 30, 2021, 3 p.m. 40.5 ppb (39) 16.1 ppb (16) N/A 25.0 ppb (24) N/A N/A N/A 0.38 ppb (5) N/A 3.0 μg/m3 (13) 39.0
 
March 30, 2021, 2 p.m. 50.0 ppb (48) 17.7 ppb (17) N/A 32.0 ppb (31) N/A N/A N/A 0.61 ppb (7) N/A 2.0 μg/m3 (9) 48.0
 
March 30, 2021, 1 p.m. 56.3 ppb (54) 21.7 ppb (21) N/A 35.0 ppb (34) N/A N/A N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 54.0
 
March 30, 2021, noon 45.5 ppb (43) 13.6 ppb (13) N/A 32.0 ppb (31) N/A N/A N/A 0.37 ppb (5) N/A 1.0 μg/m3 (5) 43.0
 
March 30, 2021, 11 a.m. 35.6 ppb (34) 10.4 ppb (10) N/A 25.0 ppb (24) N/A N/A N/A 0.29 ppb (4) N/A 2.0 μg/m3 (9) 34.0
 
March 30, 2021, 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 (13) 13.0
 
March 30, 2021, 9 a.m. 19.9 ppb (19) 2.8 ppb (3) N/A 17.0 ppb (17) N/A N/A N/A 0.29 ppb (4) N/A 2.0 μg/m3 (9) 19.0
 
March 30, 2021, 8 a.m. 27.2 ppb (26) 3.1 ppb (3) N/A 24.0 ppb (23) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
March 30, 2021, 7 a.m. 28.3 ppb (27) 4.8 ppb (5) N/A 23.0 ppb (22) N/A N/A N/A 0.36 ppb (5) N/A 4.0 μg/m3 (17) 27.0
 
March 30, 2021, 6 a.m. 13.5 ppb (13) 1.2 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 30, 2021, 5 a.m. 15.7 ppb (15) 1.7 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 30, 2021, 4 a.m. 13.5 ppb (13) 1.5 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 30, 2021, 3 a.m. 14.1 ppb (14) 0.9 ppb (1) N/A 13.0 ppb (13) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 30, 2021, 2 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (17) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
March 30, 2021, 1 a.m. 23.2 ppb (22) 5.8 ppb (6) N/A 17.0 ppb (17) N/A N/A N/A 0.49 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
March 30, 2021, midnight 19.0 ppb (18) 5.8 ppb (6) N/A 13.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
March 29, 2021, 11 p.m. 17.2 ppb (17) 5.5 ppb (6) N/A 12.0 ppb (12) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 29, 2021, 10 p.m. 18.8 ppb (18) 7.2 ppb (7) N/A 12.0 ppb (12) N/A N/A N/A 0.37 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 29, 2021, 9 p.m. 18.1 ppb (18) 6.7 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 29, 2021, 8 p.m. 20.1 ppb (19) 7.8 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.37 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 29, 2021, 7 p.m. 14.8 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 29, 2021, 6 p.m. 22.1 ppb (21) 10.0 ppb (10) N/A 12.0 ppb (12) N/A N/A N/A 0.37 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 29, 2021, 5 p.m. 39.5 ppb (38) 20.3 ppb (20) N/A 19.0 ppb (18) N/A N/A N/A 0.47 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
March 29, 2021, 4 p.m. 40.9 ppb (39) 21.6 ppb (21) N/A 19.0 ppb (18) N/A N/A N/A 0.47 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
March 29, 2021, 3 p.m. 47.2 ppb (45) 24.5 ppb (24) N/A 23.0 ppb (22) N/A N/A N/A 0.51 ppb (6) N/A 10.0 μg/m3 (42) 45.0
 
March 29, 2021, 2 p.m. 50.8 ppb (48) 26.9 ppb (26) N/A 24.0 ppb (23) N/A N/A N/A 0.59 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
March 29, 2021, 1 p.m. 44.8 ppb (43) 22.5 ppb (22) N/A 22.0 ppb (21) N/A N/A N/A 0.56 ppb (7) N/A 10.0 μg/m3 (42) 43.0
 
March 29, 2021, noon 33.8 ppb (32) 16.0 ppb (16) N/A 18.0 ppb (17) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 29, 2021, 11 a.m. 7.7 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 29, 2021, 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 (30) 30.0
 
March 29, 2021, 9 a.m. 12.5 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
March 29, 2021, 8 a.m. 10.5 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 29, 2021, 7 a.m. 12.2 ppb (12) 1.9 ppb (2) N/A 10.0 ppb (10) N/A N/A N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 29, 2021, 6 a.m. 17.4 ppb (17) 2.4 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.4 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
March 29, 2021, 5 a.m. 10.3 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
March 29, 2021, 4 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
March 29, 2021, 3 a.m. 13.0 ppb (13) 2.2 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A 0.31 ppb (4) N/A 2.0 μg/m3 (9) 13.0
 
March 29, 2021, 2 a.m. 20.5 ppb (20) 5.3 ppb (5) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 3.0 μg/m3 (13) 20.0
 
March 29, 2021, 1 a.m. 7.3 ppb (7) 1.3 ppb (2) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 29, 2021, midnight 5.6 ppb (6) 1.4 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 28, 2021, 11 p.m. 5.5 ppb (6) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
March 28, 2021, 10 p.m. 6.0 ppb (6) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 28, 2021, 9 p.m. 9.2 ppb (9) 2.4 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.4 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
March 28, 2021, 8 p.m. 8.6 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.4 ppb (5) N/A 1.0 μg/m3 (5) 9.0
 
March 28, 2021, 7 p.m. 14.3 ppb (14) 4.4 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.58 ppb (7) N/A 1.0 μg/m3 (5) 14.0
 
March 28, 2021, 6 p.m. 19.7 ppb (19) 7.0 ppb (7) N/A 13.0 ppb (13) N/A N/A N/A 0.63 ppb (7) N/A 2.0 μg/m3 (9) 19.0
 
March 28, 2021, 5 p.m. 14.5 ppb (14) 5.3 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.49 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
March 28, 2021, 4 p.m. 20.3 ppb (20) 9.1 ppb (9) N/A 11.0 ppb (11) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
March 28, 2021, 3 p.m. 29.2 ppb (28) 15.5 ppb (15) N/A 14.0 ppb (14) N/A N/A N/A 0.63 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
March 28, 2021, 2 p.m. 22.2 ppb (21) 10.9 ppb (11) N/A 11.0 ppb (11) N/A N/A N/A 0.49 ppb (6) N/A 4.0 μg/m3 (17) 21.0
 
March 28, 2021, 1 p.m. 20.6 ppb (20) 8.1 ppb (8) N/A 13.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 3.0 μg/m3 (13) 20.0
 
March 28, 2021, noon 14.6 ppb (14) 3.6 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.35 ppb (4) N/A 3.0 μg/m3 (13) 14.0
 
March 28, 2021, 11 a.m. 9.8 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 28, 2021, 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
 
March 28, 2021, 9 a.m. 9.7 ppb (10) 2.9 ppb (3) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 28, 2021, 8 a.m. 11.9 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.4 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
March 28, 2021, 7 a.m. 12.4 ppb (12) 2.7 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 28, 2021, 6 a.m. 9.2 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0