ID: 2975

AQSQID: 060010015

Site Name: Pleasanton - Owens Ct.

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

Updated: Sept. 25, 2021, 8 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
Sept. 25, 2021, 5 a.m. 13.7 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (13) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2021, 4 a.m. 14.1 ppb (14) 2.4 ppb (3) N/A 12.0 ppb (12) N/A N/A N/A 0.53 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 25, 2021, 3 a.m. 23.7 ppb (23) 7.0 ppb (7) N/A 17.0 ppb (17) N/A N/A N/A 0.73 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2021, 2 a.m. 27.5 ppb (26) 8.2 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.76 ppb (10) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 25, 2021, 1 a.m. 16.7 ppb (16) 2.9 ppb (3) N/A 14.0 ppb (14) N/A N/A N/A 0.69 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 25, 2021, midnight 22.1 ppb (21) 4.4 ppb (5) N/A 18.0 ppb (17) N/A N/A N/A 0.64 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 24, 2021, 11 p.m. 31.4 ppb (30) 8.0 ppb (8) N/A 23.0 ppb (22) N/A N/A N/A 0.84 ppb (10) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2021, 10 p.m. 32.1 ppb (31) 7.9 ppb (8) N/A 24.0 ppb (23) N/A N/A N/A 0.8 ppb (10) N/A 7.0 μg/m3 (30) 31.0
 
Sept. 24, 2021, 9 p.m. 32.7 ppb (31) 8.3 ppb (8) N/A 24.0 ppb (23) N/A N/A N/A 0.67 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 24, 2021, 8 p.m. 31.8 ppb (30) 8.8 ppb (9) N/A 23.0 ppb (22) N/A N/A N/A 0.62 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 24, 2021, 7 p.m. 27.0 ppb (26) 5.4 ppb (6) N/A 22.0 ppb (21) N/A N/A N/A 0.68 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2021, 6 p.m. 15.7 ppb (15) 2.8 ppb (3) N/A 13.0 ppb (13) N/A N/A N/A 0.57 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 24, 2021, 5 p.m. 27.8 ppb (27) 7.6 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.65 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 24, 2021, 4 p.m. 26.0 ppb (25) 7.5 ppb (8) N/A 19.0 ppb (18) N/A N/A N/A 0.59 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2021, 3 p.m. 63.9 ppb (62) 34.4 ppb (33) N/A 30.0 ppb (29) N/A N/A N/A 0.85 ppb (10) N/A 12.0 μg/m3 (50) 62.0
 
Sept. 24, 2021, 2 p.m. 78.4 ppb (77) 47.5 ppb (45) N/A 31.0 ppb (30) N/A N/A N/A 0.91 ppb (11) N/A 17.0 μg/m3 (62) 77.0
 
Sept. 24, 2021, 1 p.m. 68.7 ppb (67) 39.9 ppb (38) N/A 29.0 ppb (28) N/A N/A N/A 0.79 ppb (10) N/A 14.0 μg/m3 (55) 67.0
 
Sept. 24, 2021, noon 42.3 ppb (40) 17.1 ppb (17) N/A 25.0 ppb (24) N/A N/A N/A 0.62 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2021, 11 a.m. 34.0 ppb (33) 10.6 ppb (10) N/A 23.0 ppb (22) N/A N/A N/A 0.52 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 24, 2021, 9 a.m. 17.6 ppb (17) 3.8 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.48 ppb (6) N/A N/A 17.0
 
Sept. 24, 2021, 8 a.m. 24.1 ppb (23) 5.1 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A 0.56 ppb (7) N/A N/A 23.0
 
Sept. 24, 2021, 7 a.m. 24.2 ppb (23) 4.0 ppb (4) N/A 20.0 ppb (19) N/A N/A N/A 0.63 ppb (7) N/A N/A 23.0
 
Sept. 24, 2021, 6 a.m. 16.4 ppb (16) 0.7 ppb (1) N/A 16.0 ppb (16) N/A N/A N/A 0.55 ppb (7) N/A N/A 16.0
 
Sept. 24, 2021, 5 a.m. 13.8 ppb (14) 0.0 ppb (0) N/A 14.0 ppb (14) N/A N/A N/A 0.54 ppb (6) N/A N/A 14.0
 
Sept. 24, 2021, 4 a.m. 16.9 ppb (16) 0.0 ppb (0) N/A 17.0 ppb (17) N/A N/A N/A 0.58 ppb (7) N/A N/A 17.0
 
Sept. 24, 2021, 3 a.m. 18.6 ppb (18) 0.3 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A 0.6 ppb (7) N/A N/A 18.0
 
Sept. 24, 2021, 2 a.m. 19.8 ppb (19) 1.1 ppb (2) N/A 19.0 ppb (18) N/A N/A N/A 0.73 ppb (8) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 24, 2021, 1 a.m. 40.6 ppb (39) 4.6 ppb (5) N/A 36.0 ppb (34) N/A N/A N/A 0.96 ppb (12) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 24, 2021, midnight 27.4 ppb (26) 2.2 ppb (3) N/A 25.0 ppb (24) N/A N/A N/A 0.73 ppb (8) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 23, 2021, 11 p.m. 20.8 ppb (20) 4.3 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.57 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2021, 10 p.m. 21.6 ppb (21) 5.7 ppb (6) N/A 16.0 ppb (16) N/A N/A N/A 0.56 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2021, 9 p.m. 12.3 ppb (12) 2.3 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.47 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2021, 8 p.m. 24.8 ppb (24) 5.5 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A 0.66 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 23, 2021, 7 p.m. 30.7 ppb (29) 8.9 ppb (9) N/A 22.0 ppb (21) N/A N/A N/A 0.73 ppb (8) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 23, 2021, 6 p.m. 13.2 ppb (13) 2.8 ppb (3) N/A 10.0 ppb (10) N/A N/A N/A 0.48 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2021, 5 p.m. 16.2 ppb (16) 3.7 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.48 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 23, 2021, 4 p.m. 24.4 ppb (24) 8.0 ppb (8) N/A 17.0 ppb (17) N/A N/A N/A 0.58 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2021, 3 p.m. 30.4 ppb (29) 11.9 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.66 ppb (8) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 23, 2021, 2 p.m. 32.5 ppb (31) 11.3 ppb (11) N/A 21.0 ppb (20) N/A N/A N/A 0.64 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 23, 2021, 1 p.m. 50.5 ppb (48) 24.3 ppb (23) N/A 26.0 ppb (25) N/A N/A N/A 0.71 ppb (8) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 23, 2021, noon 17.2 ppb (17) 1.1 ppb (2) N/A 16.0 ppb (16) N/A N/A N/A 0.52 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2021, 11 a.m. 13.6 ppb (13) 0.3 ppb (1) N/A 13.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 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
 
Sept. 23, 2021, 9 a.m. 15.5 ppb (15) 2.6 ppb (3) N/A 13.0 ppb (13) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 23, 2021, 8 a.m. 13.4 ppb (13) 0.5 ppb (1) N/A 13.0 ppb (13) N/A N/A N/A 0.49 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 23, 2021, 7 a.m. 15.7 ppb (15) 1.4 ppb (2) N/A 14.0 ppb (14) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2021, 6 a.m. 17.6 ppb (17) 2.4 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.53 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2021, 5 a.m. 25.0 ppb (24) 3.7 ppb (4) N/A 21.0 ppb (20) N/A N/A N/A 0.69 ppb (8) N/A 5.0 μg/m3 (21) 24.0
 
Sept. 23, 2021, 4 a.m. 22.1 ppb (21) 1.8 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A 0.67 ppb (8) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2021, 3 a.m. 18.0 ppb (17) 2.7 ppb (3) N/A 15.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 23, 2021, 2 a.m. 9.7 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 2.0 μg/m3 (9) 10.0
 
Sept. 23, 2021, 1 a.m. 22.5 ppb (22) 7.3 ppb (7) N/A 15.0 ppb (15) N/A N/A N/A 0.49 ppb (6) N/A 2.0 μg/m3 (9) 22.0
 
Sept. 23, 2021, midnight 18.4 ppb (18) 4.2 ppb (4) N/A 14.0 ppb (14) N/A N/A N/A 0.49 ppb (6) N/A 1.0 μg/m3 (5) 18.0
 
Sept. 22, 2021, 11 p.m. 23.9 ppb (23) 8.2 ppb (8) N/A 16.0 ppb (16) N/A N/A N/A 0.57 ppb (7) N/A 0.0 μg/m3 (0) 23.0
 
Sept. 22, 2021, 10 p.m. 19.1 ppb (19) 5.9 ppb (6) N/A 13.0 ppb (13) N/A N/A N/A 0.48 ppb (6) N/A 4.0 μg/m3 (17) 19.0
 
Sept. 22, 2021, 9 p.m. 14.2 ppb (14) 3.5 ppb (4) N/A 11.0 ppb (11) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2021, 8 p.m. 22.7 ppb (22) 7.6 ppb (8) N/A 15.0 ppb (15) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2021, 7 p.m. 30.4 ppb (29) 10.4 ppb (10) N/A 20.0 ppb (19) N/A N/A N/A 0.59 ppb (7) N/A 3.0 μg/m3 (13) 29.0
 
Sept. 22, 2021, 6 p.m. 27.4 ppb (26) 8.5 ppb (9) N/A 19.0 ppb (18) N/A N/A N/A 0.54 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 22, 2021, 5 p.m. 31.7 ppb (30) 11.5 ppb (11) N/A 20.0 ppb (19) N/A N/A N/A 0.6 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 22, 2021, 4 p.m. 15.7 ppb (15) 3.2 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.55 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 22, 2021, 3 p.m. 34.5 ppb (33) 12.7 ppb (12) N/A 22.0 ppb (21) N/A N/A N/A 0.64 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2021, 2 p.m. 68.1 ppb (67) 39.5 ppb (38) N/A 29.0 ppb (28) N/A N/A N/A 0.85 ppb (10) N/A 15.0 μg/m3 (58) 67.0
 
Sept. 22, 2021, 1 p.m. 32.9 ppb (32) 9.6 ppb (10) N/A 23.0 ppb (22) N/A N/A N/A 0.62 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 22, 2021, noon 39.2 ppb (37) 17.1 ppb (17) N/A 22.0 ppb (21) N/A N/A N/A 0.59 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2021, 11 a.m. 40.9 ppb (39) 17.0 ppb (17) N/A 24.0 ppb (23) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (34) 39.0
 
Sept. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2021, 9 a.m. 12.6 ppb (12) 0.0 ppb (0) 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
 
Sept. 22, 2021, 8 a.m. 10.0 ppb (10) 0.4 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2021, 7 a.m. 10.0 ppb (10) 0.7 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 22, 2021, 6 a.m. 10.8 ppb (11) 0.2 ppb (1) N/A 11.0 ppb (11) N/A N/A N/A 0.54 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2021, 5 a.m. 19.1 ppb (19) 3.1 ppb (3) N/A 16.0 ppb (16) N/A N/A N/A 0.65 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2021, 4 a.m. 5.9 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 22, 2021, 3 a.m. 4.7 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.4 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2021, 2 a.m. 13.8 ppb (14) 0.8 ppb (1) N/A 13.0 ppb (13) N/A N/A N/A 0.56 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2021, 1 a.m. 18.5 ppb (18) 0.9 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A 0.73 ppb (8) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 22, 2021, midnight 19.3 ppb (19) 0.9 ppb (1) N/A 18.0 ppb (17) N/A N/A N/A 0.6 ppb (7) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 21, 2021, 11 p.m. 6.0 ppb (6) 0.1 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2021, 10 p.m. 6.7 ppb (7) 0.2 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.47 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 21, 2021, 9 p.m. 12.4 ppb (12) 1.8 ppb (2) N/A 11.0 ppb (11) N/A N/A N/A 0.47 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 21, 2021, 8 p.m. 15.6 ppb (15) 3.2 ppb (4) N/A 13.0 ppb (13) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2021, 7 p.m. 27.4 ppb (26) 7.4 ppb (7) N/A 20.0 ppb (19) N/A N/A N/A 0.58 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2021, 6 p.m. 38.9 ppb (37) 16.3 ppb (16) N/A 23.0 ppb (22) N/A N/A N/A 0.94 ppb (11) N/A 7.0 μg/m3 (30) 37.0
 
Sept. 21, 2021, 4 p.m. 78.4 ppb (77) 42.5 ppb (41) N/A 36.0 ppb (34) N/A N/A N/A 0.71 ppb (8) N/A 19.0 μg/m3 (66) 77.0
 
Sept. 21, 2021, 3 p.m. 83.1 ppb (82) 52.2 ppb (50) N/A 31.0 ppb (30) N/A N/A N/A 0.96 ppb (12) N/A N/A 82.0
 
Sept. 21, 2021, 2 p.m. 83.0 ppb (82) 55.1 ppb (53) N/A 28.0 ppb (27) N/A N/A N/A 0.92 ppb (11) N/A 6.0 μg/m3 (25) 82.0
 
Sept. 21, 2021, 1 p.m. 55.9 ppb (54) 33.4 ppb (32) N/A 23.0 ppb (22) N/A N/A N/A 0.61 ppb (7) N/A 3.0 μg/m3 (13) 54.0
 
Sept. 21, 2021, noon 49.0 ppb (47) 26.5 ppb (25) N/A 23.0 ppb (22) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 47.0
 
Sept. 21, 2021, 11 a.m. 35.5 ppb (34) 13.3 ppb (13) N/A 22.0 ppb (21) N/A N/A N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 34.0
 
Sept. 21, 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
 
Sept. 21, 2021, 9 a.m. 26.3 ppb (25) 7.4 ppb (7) N/A 19.0 ppb (18) N/A N/A N/A 0.36 ppb (5) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 21, 2021, 8 a.m. 19.6 ppb (19) 4.3 ppb (5) N/A 15.0 ppb (15) N/A N/A N/A 0.36 ppb (5) N/A 2.0 μg/m3 (9) 19.0
 
Sept. 21, 2021, 7 a.m. 21.9 ppb (21) 5.1 ppb (5) N/A 17.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2021, 6 a.m. 22.4 ppb (22) 5.6 ppb (6) N/A 17.0 ppb (17) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 21, 2021, 5 a.m. 23.0 ppb (22) 4.3 ppb (5) N/A 19.0 ppb (18) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 22.0
 
Sept. 21, 2021, 4 a.m. 23.8 ppb (23) 2.2 ppb (3) N/A 22.0 ppb (21) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 23.0
 
Sept. 21, 2021, 3 a.m. 18.0 ppb (17) N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 17.0
 
Sept. 21, 2021, 2 a.m. 21.4 ppb (21) N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 21.0
 
Sept. 21, 2021, 1 a.m. 34.2 ppb (33) N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 33.0
 
Sept. 21, 2021, midnight 29.4 ppb (28) N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 28.0
 
Sept. 20, 2021, 11 p.m. 34.1 ppb (33) N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 33.0
 
Sept. 20, 2021, 10 p.m. 25.3 ppb (24) N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 24.0
 
Sept. 20, 2021, 9 p.m. 12.3 ppb (12) N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 8 p.m. 5.8 ppb (6) N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2021, 7 p.m. 31.4 ppb (30) 13.0 ppb (13) N/A 18.0 ppb (17) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 30.0
 
Sept. 20, 2021, 6 p.m. 30.0 ppb (29) 13.9 ppb (14) N/A 16.0 ppb (16) N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 29.0
 
Sept. 20, 2021, 5 p.m. 35.3 ppb (34) 17.5 ppb (17) N/A 18.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 3.0 μg/m3 (13) 34.0
 
Sept. 20, 2021, 4 p.m. 39.6 ppb (38) 19.4 ppb (19) N/A 20.0 ppb (19) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 38.0
 
Sept. 20, 2021, 3 p.m. 80.0 ppb (79) 55.7 ppb (53) N/A 24.0 ppb (23) N/A N/A N/A 0.98 ppb (12) N/A 9.0 μg/m3 (38) 79.0
 
Sept. 20, 2021, 2 p.m. 65.6 ppb (64) 45.4 ppb (43) N/A 20.0 ppb (19) N/A N/A N/A 0.85 ppb (10) N/A 7.0 μg/m3 (30) 64.0
 
Sept. 20, 2021, 1 p.m. 19.1 ppb (19) 3.9 ppb (4) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, noon 26.3 ppb (25) 12.7 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.55 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 20, 2021, 11 a.m. 8.7 ppb (9) 0.4 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.38 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 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
 
Sept. 20, 2021, 9 a.m. 7.4 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.36 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 20, 2021, 8 a.m. 7.3 ppb (7) 0.1 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.37 ppb (5) N/A 1.0 μg/m3 (5) 7.0
 
Sept. 20, 2021, 7 a.m. 8.2 ppb (8) 0.1 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.38 ppb (5) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 20, 2021, 6 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2021, 5 a.m. 4.4 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 4 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 3 a.m. 8.8 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 2 a.m. 11.7 ppb (12) 2.7 ppb (3) N/A 9.0 ppb (9) N/A N/A N/A 0.52 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2021, 1 a.m. 4.6 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, midnight 4.0 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 19, 2021, 11 p.m. 3.4 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 10 p.m. 4.0 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (5) 5.0
 
Sept. 19, 2021, 9 p.m. 9.4 ppb (9) 3.4 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 8 p.m. 9.8 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.57 ppb (7) N/A 2.0 μg/m3 (9) 10.0
 
Sept. 19, 2021, 7 p.m. 11.1 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 2.0 μg/m3 (9) 11.0
 
Sept. 19, 2021, 6 p.m. 8.6 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 5 p.m. 8.8 ppb (9) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 4 p.m. 7.4 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A 1.0 μg/m3 (5) 7.0
 
Sept. 19, 2021, 3 p.m. 4.8 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 2 p.m. 10.3 ppb (10) 2.8 ppb (3) N/A 8.0 ppb (8) N/A N/A N/A 0.42 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 1 p.m. 5.2 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (4) N/A -1.0 μg/m3 (0) 5.0
 
Sept. 19, 2021, noon 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.28 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 11 a.m. 4.5 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 9 a.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.26 ppb (4) N/A -1.0 μg/m3 (0) 4.0
 
Sept. 19, 2021, 8 a.m. 5.5 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (4) N/A -3.0 μg/m3 (0) 6.0
 
Sept. 19, 2021, 7 a.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.27 ppb (4) N/A 1.0 μg/m3 (5) 5.0
 
Sept. 19, 2021, 6 a.m. 2.6 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 5 a.m. 9.5 ppb (9) 3.3 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.47 ppb (6) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 4 a.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.28 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 19, 2021, 3 a.m. 5.4 ppb (6) 1.4 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 2 a.m. 10.0 ppb (10) 3.7 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.47 ppb (6) N/A 2.0 μg/m3 (9) 10.0
 
Sept. 19, 2021, 1 a.m. 10.7 ppb (11) 4.3 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.51 ppb (6) N/A 1.0 μg/m3 (5) 11.0
 
Sept. 19, 2021, midnight 14.5 ppb (14) 7.2 ppb (7) N/A 7.0 ppb (7) N/A N/A N/A 0.66 ppb (8) N/A 0.0 μg/m3 (0) 14.0
 
Sept. 18, 2021, 11 p.m. 12.2 ppb (12) 5.7 ppb (6) N/A 7.0 ppb (7) N/A N/A N/A 0.49 ppb (6) N/A 2.0 μg/m3 (9) 12.0
 
Sept. 18, 2021, 10 p.m. 7.2 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.39 ppb (5) N/A N/A 7.0
 
Sept. 18, 2021, 9 p.m. 7.2 ppb (7) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.37 ppb (5) N/A N/A 7.0
 
Sept. 18, 2021, 8 p.m. 7.4 ppb (7) 2.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.36 ppb (5) N/A N/A 7.0
 
Sept. 18, 2021, 7 p.m. 8.0 ppb (8) 3.1 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.41 ppb (5) N/A N/A 8.0
 
Sept. 18, 2021, 6 p.m. 9.3 ppb (9) 3.7 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.42 ppb (5) N/A N/A 9.0
 
Sept. 18, 2021, 5 p.m. 10.5 ppb (10) 4.3 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.47 ppb (6) N/A N/A 10.0
 
Sept. 18, 2021, 4 p.m. 16.1 ppb (16) 7.2 ppb (7) N/A 9.0 ppb (9) N/A N/A N/A 0.59 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2021, 3 p.m. 4.5 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.39 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 2 p.m. 4.7 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 18, 2021, 1 p.m. 6.0 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.39 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, noon 2.2 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 11 a.m. 3.3 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.35 ppb (4) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 18, 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
 
Sept. 18, 2021, 9 a.m. 2.8 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.36 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 18, 2021, 8 a.m. 4.6 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 7 a.m. 4.7 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.38 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 6 a.m. 8.5 ppb (9) 1.9 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.48 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 5 a.m. 9.0 ppb (9) 1.7 ppb (2) N/A 7.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 14.0 μg/m3 (55) 55.0