ID: 2975

AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

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

Updated: March 6, 2021, 6:32 a.m.

Location: Pleasanton (Dougherty), CA

Reporting: True, Located: True

Current AQI: 13.0

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
March 6, 2021, 5 a.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
March 6, 2021, 4 a.m. 2.8 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 6, 2021, 3 a.m. 7.7 ppb (8) 2.3 ppb (3) 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
 
March 6, 2021, 2 a.m. 18.4 ppb (18) 6.9 ppb (7) N/A 12.0 ppb (12) N/A N/A N/A 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 6, 2021, 1 a.m. 5.9 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 6, 2021, midnight 13.2 ppb (13) 4.5 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.3 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
March 5, 2021, 11 p.m. 14.9 ppb (15) 5.2 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.4 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
March 5, 2021, 10 p.m. 24.7 ppb (24) 10.0 ppb (10) N/A 15.0 ppb (15) N/A N/A N/A 0.39 ppb (5) N/A 0.0 μg/m3 (0) 24.0
 
March 5, 2021, 9 p.m. 20.7 ppb (20) 8.0 ppb (8) N/A 13.0 ppb (13) N/A N/A N/A 0.37 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 5, 2021, 8 p.m. 18.8 ppb (18) 7.1 ppb (7) N/A 12.0 ppb (12) N/A N/A N/A 0.31 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 5, 2021, 7 p.m. 38.3 ppb (37) 16.9 ppb (16) N/A 21.0 ppb (20) N/A N/A N/A 0.49 ppb (6) N/A 8.0 μg/m3 (34) 37.0
 
March 5, 2021, 6 p.m. 56.6 ppb (54) 29.8 ppb (29) N/A 27.0 ppb (26) N/A N/A N/A 0.63 ppb (7) N/A 8.0 μg/m3 (34) 54.0
 
March 5, 2021, 5 p.m. 52.3 ppb (50) 28.3 ppb (27) N/A 24.0 ppb (23) N/A N/A N/A 0.59 ppb (7) N/A 10.0 μg/m3 (42) 50.0
 
March 5, 2021, 4 p.m. 50.3 ppb (48) 28.6 ppb (27) N/A 22.0 ppb (21) N/A N/A N/A 0.52 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
March 5, 2021, 3 p.m. 59.3 ppb (57) 36.6 ppb (35) N/A 23.0 ppb (22) N/A N/A N/A 0.67 ppb (8) N/A 10.0 μg/m3 (42) 57.0
 
March 5, 2021, 2 p.m. 67.9 ppb (66) 43.6 ppb (42) N/A 24.0 ppb (23) N/A N/A N/A 0.73 ppb (8) N/A 7.0 μg/m3 (30) 66.0
 
March 5, 2021, 1 p.m. 43.1 ppb (41) 22.7 ppb (22) N/A 20.0 ppb (19) N/A N/A N/A 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 5, 2021, noon 20.0 ppb (19) 2.5 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 5, 2021, 11 a.m. 21.9 ppb (21) 3.4 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 9 a.m. 21.3 ppb (21) 7.4 ppb (7) N/A 14.0 ppb (14) N/A N/A N/A 0.4 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 8 a.m. 22.5 ppb (22) 8.2 ppb (8) N/A 14.0 ppb (14) N/A N/A N/A 0.46 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
March 5, 2021, 7 a.m. 19.3 ppb (19) 1.7 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.4 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 5, 2021, 6 a.m. 29.7 ppb (29) 10.6 ppb (10) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 5, 2021, 5 a.m. 33.7 ppb (32) 10.4 ppb (10) N/A 23.0 ppb (22) N/A N/A N/A 0.58 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 5, 2021, 4 a.m. 35.9 ppb (34) 8.7 ppb (9) N/A 27.0 ppb (26) N/A N/A N/A 0.69 ppb (8) N/A 18.0 μg/m3 (64) 64.0
 
March 5, 2021, 3 a.m. 32.4 ppb (31) 9.5 ppb (9) N/A 23.0 ppb (22) N/A N/A N/A 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 5, 2021, 2 a.m. 26.6 ppb (26) 6.6 ppb (7) N/A 20.0 ppb (19) N/A N/A N/A 0.5 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
March 5, 2021, 1 a.m. 31.4 ppb (30) 10.0 ppb (10) N/A 22.0 ppb (21) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
March 5, 2021, midnight 15.8 ppb (15) 3.7 ppb (4) N/A 12.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 11 p.m. 20.6 ppb (20) 6.8 ppb (7) N/A 14.0 ppb (14) N/A N/A N/A 0.37 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 10 p.m. 18.2 ppb (18) 6.4 ppb (7) 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 4, 2021, 9 p.m. 25.3 ppb (24) 9.7 ppb (10) N/A 16.0 ppb (16) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 8 p.m. 31.1 ppb (30) 11.7 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.48 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 7 p.m. 33.1 ppb (32) 14.3 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.48 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
March 4, 2021, 6 p.m. 34.5 ppb (33) 14.8 ppb (14) N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
March 4, 2021, 5 p.m. 65.2 ppb (63) 35.3 ppb (34) N/A 30.0 ppb (29) N/A N/A N/A 0.57 ppb (7) N/A 17.0 μg/m3 (62) 63.0
 
March 4, 2021, 4 p.m. 56.1 ppb (54) 30.8 ppb (30) N/A 25.0 ppb (24) N/A N/A N/A 0.55 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
March 4, 2021, 3 p.m. 52.6 ppb (50) 26.8 ppb (26) N/A 26.0 ppb (25) N/A N/A N/A 0.56 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 2 p.m. 37.1 ppb (35) 13.1 ppb (13) N/A 24.0 ppb (23) N/A N/A N/A 0.5 ppb (6) N/A 8.0 μg/m3 (34) 35.0
 
March 4, 2021, 1 p.m. 21.9 ppb (21) 4.8 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.34 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 4, 2021, noon 21.8 ppb (21) 3.8 ppb (4) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 4, 2021, 11 a.m. 22.4 ppb (22) 7.0 ppb (7) N/A 15.0 ppb (15) N/A N/A N/A 0.3 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 4, 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 4, 2021, 9 a.m. 18.1 ppb (18) 2.9 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 8 a.m. 17.2 ppb (17) 4.4 ppb (5) N/A 13.0 ppb (13) N/A N/A N/A 0.34 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
March 4, 2021, 7 a.m. 14.1 ppb (14) 4.4 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.38 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 6 a.m. 19.8 ppb (19) 5.2 ppb (5) N/A 15.0 ppb (15) N/A N/A N/A 0.45 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 5 a.m. 21.2 ppb (20) 6.2 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.47 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 4 a.m. 16.2 ppb (16) 4.4 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 4, 2021, 3 a.m. 12.7 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 2 a.m. 12.1 ppb (12) 3.4 ppb (4) N/A 9.0 ppb (9) N/A N/A N/A 0.36 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 1 a.m. 15.7 ppb (15) 4.7 ppb (5) 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 4, 2021, midnight 18.5 ppb (18) 5.6 ppb (6) N/A 13.0 ppb (13) N/A N/A N/A 0.32 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 11 p.m. 13.6 ppb (13) 2.8 ppb (3) N/A 11.0 ppb (11) N/A N/A N/A 0.29 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 10 p.m. 10.2 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 9 p.m. 28.3 ppb (27) 8.0 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
March 3, 2021, 8 p.m. 33.8 ppb (32) 12.2 ppb (12) N/A 22.0 ppb (21) N/A N/A N/A 0.43 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 5 p.m. 33.3 ppb (32) 14.1 ppb (14) N/A 19.0 ppb (18) N/A N/A N/A 0.56 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 4 p.m. 88.3 ppb (88) 58.9 ppb (57) N/A 29.0 ppb (28) N/A N/A N/A 0.8 ppb (10) N/A 13.0 μg/m3 (53) 88.0
 
March 3, 2021, 3 p.m. 62.6 ppb (61) 35.8 ppb (34) N/A 27.0 ppb (26) N/A N/A N/A 0.7 ppb (8) N/A 16.0 μg/m3 (60) 61.0
 
March 3, 2021, 2 p.m. 54.8 ppb (52) 30.8 ppb (30) N/A 24.0 ppb (23) N/A N/A N/A 0.68 ppb (8) N/A 9.0 μg/m3 (38) 52.0
 
March 3, 2021, 1 p.m. 44.3 ppb (42) 21.4 ppb (21) N/A 23.0 ppb (22) N/A N/A N/A 0.57 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, noon 36.3 ppb (35) 12.0 ppb (12) N/A 24.0 ppb (23) N/A N/A N/A 0.46 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 11 a.m. 35.2 ppb (34) 12.3 ppb (12) N/A 23.0 ppb (22) N/A N/A N/A 0.48 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 10 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
 
March 3, 2021, 9 a.m. 21.1 ppb (20) 6.4 ppb (7) N/A 15.0 ppb (15) N/A N/A N/A 0.44 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 8 a.m. 13.2 ppb (13) 1.1 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 7 a.m. 24.5 ppb (24) 5.8 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A 0.55 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, 6 a.m. 19.7 ppb (19) 2.2 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.53 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
March 3, 2021, 5 a.m. 15.8 ppb (15) 0.8 ppb (1) N/A 15.0 ppb (15) N/A N/A N/A 0.47 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 4 a.m. 21.6 ppb (21) 1.8 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A 0.51 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 3 a.m. 38.9 ppb (37) 5.7 ppb (6) N/A 33.0 ppb (32) N/A N/A N/A 0.71 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 2 a.m. 22.4 ppb (22) 1.8 ppb (2) N/A 21.0 ppb (20) N/A N/A N/A 0.5 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
March 3, 2021, 1 a.m. 23.7 ppb (23) 2.5 ppb (3) N/A 21.0 ppb (20) N/A N/A N/A 0.47 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, midnight 25.9 ppb (25) 4.2 ppb (4) N/A 22.0 ppb (21) N/A N/A N/A 0.47 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 11 p.m. 44.8 ppb (43) 14.7 ppb (14) N/A 30.0 ppb (29) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (34) 43.0
 
March 2, 2021, 10 p.m. 34.3 ppb (33) 10.9 ppb (11) N/A 23.0 ppb (22) N/A N/A N/A 0.49 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 9 p.m. 37.7 ppb (36) 13.4 ppb (13) N/A 24.0 ppb (23) N/A N/A N/A 0.55 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
March 2, 2021, 8 p.m. 20.9 ppb (20) 5.8 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 2, 2021, 7 p.m. 35.1 ppb (34) 13.9 ppb (14) N/A 21.0 ppb (20) N/A N/A N/A 0.5 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 6 p.m. 52.3 ppb (50) 24.9 ppb (24) N/A 27.0 ppb (26) N/A N/A N/A 0.61 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
March 2, 2021, 5 p.m. 97.3 ppb (98) 61.7 ppb (60) N/A 36.0 ppb (34) N/A N/A N/A 0.79 ppb (10) N/A 19.0 μg/m3 (66) 98.0
 
March 2, 2021, 4 p.m. 50.1 ppb (48) 24.6 ppb (24) N/A 26.0 ppb (25) N/A N/A N/A 0.57 ppb (7) N/A 8.0 μg/m3 (34) 48.0
 
March 2, 2021, 3 p.m. 65.5 ppb (64) 36.9 ppb (35) N/A 29.0 ppb (28) N/A N/A N/A 0.71 ppb (8) N/A 13.0 μg/m3 (53) 64.0
 
March 2, 2021, 2 p.m. 65.8 ppb (64) 39.8 ppb (38) N/A 26.0 ppb (25) N/A N/A N/A 0.64 ppb (7) N/A 9.0 μg/m3 (38) 64.0
 
March 2, 2021, 1 p.m. 54.1 ppb (52) 28.3 ppb (27) N/A 26.0 ppb (25) N/A N/A N/A 0.55 ppb (7) N/A 11.0 μg/m3 (46) 52.0
 
March 2, 2021, noon 43.4 ppb (41) 19.8 ppb (19) N/A 24.0 ppb (23) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 41.0
 
March 2, 2021, 11 a.m. 31.4 ppb (30) 10.7 ppb (11) N/A 21.0 ppb (20) N/A N/A N/A 0.39 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 10 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
 
March 2, 2021, 9 a.m. 22.0 ppb (21) 2.8 ppb (3) N/A 19.0 ppb (18) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 8 a.m. 18.3 ppb (18) 3.6 ppb (4) N/A 15.0 ppb (15) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 7 a.m. 18.1 ppb (18) 2.2 ppb (3) N/A 16.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 6 a.m. 19.7 ppb (19) 3.3 ppb (4) N/A 16.0 ppb (16) N/A N/A N/A 0.46 ppb (6) N/A 4.0 μg/m3 (17) 19.0
 
March 2, 2021, 5 a.m. 31.0 ppb (30) 7.8 ppb (8) N/A 23.0 ppb (22) N/A N/A N/A 0.57 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 4 a.m. 25.9 ppb (25) 6.0 ppb (6) N/A 20.0 ppb (19) N/A N/A N/A 0.52 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
March 2, 2021, 3 a.m. 28.5 ppb (27) 7.5 ppb (8) N/A 21.0 ppb (20) N/A N/A N/A 0.49 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
March 2, 2021, 2 a.m. 14.3 ppb (14) 0.8 ppb (1) N/A 13.0 ppb (13) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 2, 2021, 1 a.m. 4.4 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 2, 2021, midnight 3.7 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 11 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
March 1, 2021, 10 p.m. 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 9 p.m. 3.4 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
March 1, 2021, 8 p.m. 4.6 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 7 p.m. 6.8 ppb (7) 1.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 1, 2021, 6 p.m. 43.0 ppb (41) 19.4 ppb (19) N/A 24.0 ppb (23) N/A N/A N/A 0.47 ppb (6) N/A N/A 41.0
 
March 1, 2021, 5 p.m. 90.6 ppb (90) 58.8 ppb (57) N/A 32.0 ppb (31) N/A N/A N/A 0.82 ppb (10) N/A 14.0 μg/m3 (55) 90.0
 
March 1, 2021, 4 p.m. 67.9 ppb (66) 43.3 ppb (41) N/A 25.0 ppb (24) N/A N/A N/A 0.72 ppb (8) N/A 21.0 μg/m3 (70) 70.0
 
March 1, 2021, 3 p.m. 87.6 ppb (87) 60.5 ppb (58) N/A 27.0 ppb (26) N/A N/A N/A 0.78 ppb (10) N/A 11.0 μg/m3 (46) 87.0
 
March 1, 2021, 2 p.m. 75.3 ppb (74) 49.8 ppb (47) N/A 26.0 ppb (25) N/A N/A N/A 0.83 ppb (10) N/A 9.0 μg/m3 (38) 74.0
 
March 1, 2021, 1 p.m. 60.2 ppb (58) 36.3 ppb (35) N/A 24.0 ppb (23) N/A N/A N/A 0.55 ppb (7) N/A 6.0 μg/m3 (25) 58.0
 
March 1, 2021, noon 35.4 ppb (34) 13.6 ppb (13) N/A 22.0 ppb (21) N/A N/A N/A 0.48 ppb (6) N/A 6.0 μg/m3 (25) 34.0
 
March 1, 2021, 11 a.m. 23.8 ppb (23) 4.6 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 1, 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 1, 2021, 9 a.m. 16.7 ppb (16) 4.9 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 5 a.m. 22.9 ppb (22) 5.5 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.56 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
March 1, 2021, 4 a.m. 23.2 ppb (22) 6.3 ppb (6) N/A 17.0 ppb (17) N/A N/A N/A 0.59 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
March 1, 2021, 3 a.m. 20.4 ppb (20) 4.5 ppb (5) N/A 16.0 ppb (16) N/A N/A N/A 0.59 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
March 1, 2021, 2 a.m. 23.4 ppb (23) 6.2 ppb (6) N/A 17.0 ppb (17) N/A N/A N/A 0.53 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
March 1, 2021, 1 a.m. 20.8 ppb (20) 5.9 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.72 ppb (8) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, midnight 8.1 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 28, 2021, 11 p.m. 6.8 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 10 p.m. 11.8 ppb (12) 4.5 ppb (5) N/A 7.0 ppb (7) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 9 p.m. 10.7 ppb (11) 4.1 ppb (4) N/A 7.0 ppb (7) N/A N/A N/A 0.48 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 28, 2021, 8 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 28, 2021, 7 p.m. 10.0 ppb (10) 4.1 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.46 ppb (6) N/A 2.0 μg/m3 (9) 10.0
 
Feb. 28, 2021, 6 p.m. 13.7 ppb (13) 5.9 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.49 ppb (6) N/A 2.0 μg/m3 (9) 13.0
 
Feb. 28, 2021, 5 p.m. 14.7 ppb (14) 5.9 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.47 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 4 p.m. 20.7 ppb (20) 9.0 ppb (9) N/A 12.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 28, 2021, 3 p.m. 37.9 ppb (36) 21.1 ppb (20) N/A 17.0 ppb (17) N/A N/A N/A 0.68 ppb (8) N/A 4.0 μg/m3 (17) 36.0
 
Feb. 28, 2021, 2 p.m. 21.4 ppb (21) 7.2 ppb (7) N/A 14.0 ppb (14) N/A N/A N/A 0.49 ppb (6) N/A 2.0 μg/m3 (9) 21.0
 
Feb. 28, 2021, 1 p.m. 20.7 ppb (20) 6.0 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 28, 2021, noon 16.1 ppb (16) 3.0 ppb (3) N/A 13.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 28, 2021, 11 a.m. 15.3 ppb (15) 2.8 ppb (3) N/A 13.0 ppb (13) N/A N/A N/A 0.45 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 28, 2021, 2 a.m. 15.3 ppb (15) 5.6 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.49 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 1 a.m. 15.8 ppb (15) 6.2 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 28, 2021, midnight 10.7 ppb (11) 4.5 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 27, 2021, 11 p.m. 9.4 ppb (9) 3.8 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.3 ppb (4) N/A 1.0 μg/m3 (5) 9.0
 
Feb. 27, 2021, 10 p.m. 15.2 ppb (15) 6.3 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 9 p.m. 13.6 ppb (13) 6.0 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.44 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 27, 2021, 8 p.m. 16.9 ppb (16) 7.3 ppb (7) N/A 10.0 ppb (10) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 27, 2021, 7 p.m. 18.7 ppb (18) 8.4 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.53 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 6 p.m. 20.0 ppb (19) 8.4 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.54 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 5 p.m. 23.9 ppb (23) 10.7 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.57 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 27, 2021, 4 p.m. 15.4 ppb (15) 5.6 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.39 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 27, 2021, 3 p.m. 19.8 ppb (19) 7.2 ppb (7) N/A 13.0 ppb (13) N/A N/A N/A 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 27, 2021, 2 p.m. 31.8 ppb (30) 14.7 ppb (14) N/A 17.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 27, 2021, 1 p.m. 23.8 ppb (23) 11.1 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 27, 2021, noon 21.4 ppb (21) 6.0 ppb (6) N/A 15.0 ppb (15) N/A N/A N/A 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 27, 2021, 4 a.m. 6.2 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 27, 2021, 3 a.m. 10.9 ppb (11) 2.0 ppb (2) N/A 9.0 ppb (9) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 2 a.m. 8.1 ppb (8) 1.1 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 27, 2021, 1 a.m. 7.3 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 27, 2021, midnight 6.6 ppb (7) 1.2 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 26, 2021, 11 p.m. 11.8 ppb (12) 3.4 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 10 p.m. 10.8 ppb (11) 2.8 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 9 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (12) N/A N/A N/A 0.32 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
Feb. 26, 2021, 8 p.m. 43.0 ppb (41) 21.8 ppb (21) N/A 21.0 ppb (20) N/A N/A N/A 0.47 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 26, 2021, 7 p.m. 26.3 ppb (25) 11.3 ppb (11) N/A 15.0 ppb (15) N/A N/A N/A 0.48 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 26, 2021, 6 p.m. 52.2 ppb (50) 30.6 ppb (29) N/A 22.0 ppb (21) N/A N/A N/A 0.61 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 26, 2021, 5 p.m. 47.3 ppb (45) 26.5 ppb (25) N/A 21.0 ppb (20) N/A N/A N/A 0.55 ppb (7) N/A 9.0 μg/m3 (38) 45.0
 
Feb. 26, 2021, 4 p.m. 39.5 ppb (38) 21.3 ppb (21) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 38.0
 
Feb. 26, 2021, 3 p.m. 41.8 ppb (40) 21.0 ppb (20) N/A 21.0 ppb (20) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 40.0
 
Feb. 26, 2021, 2 p.m. 63.8 ppb (62) 40.0 ppb (38) N/A 24.0 ppb (23) N/A N/A N/A 0.62 ppb (7) N/A 8.0 μg/m3 (34) 62.0
 
Feb. 26, 2021, 1 p.m. 55.2 ppb (53) 33.1 ppb (32) N/A 22.0 ppb (21) N/A N/A N/A 0.51 ppb (6) N/A 6.0 μg/m3 (25) 53.0
 
Feb. 26, 2021, noon 32.8 ppb (31) 11.1 ppb (11) N/A 22.0 ppb (21) N/A N/A N/A 0.39 ppb (5) N/A 6.0 μg/m3 (25) 31.0