ID: 895

AQSQID: 530330080

Site Name: Seattle-Beacon Hill

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

Updated: March 6, 2021, 7:32 a.m.

Location: Seattle (N Beacon Hill), WA

Reporting: True, Located: True

Current AQI: 27.0

Seattle (N Beacon Hill) WA, US: 47.568236, -122.308628

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 6, 2021, 6 a.m. N/A 0.0 ppb (0) 10.9 ppb (11) 11.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (27) 0.18 ppb (3) N/A 0.0 μg/m3 (0) 27.0
 
March 6, 2021, 5 a.m. N/A 0.0 ppb (0) 11.0 ppb (11) 11.0 ppb (11) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 28.0
 
March 6, 2021, 4 a.m. N/A 0.3 ppb (1) 11.7 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 30.0 ppb (28) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 28.0
 
March 6, 2021, 3 a.m. N/A 0.3 ppb (1) 18.6 ppb (18) 18.0 ppb (17) N/A 0.0 ppb (0) 20.0 ppb (19) 0.32 ppb (4) N/A 2.0 μg/m3 (9) 19.0
 
March 6, 2021, 2 a.m. N/A 0.3 ppb (1) 17.8 ppb (17) 18.0 ppb (17) N/A 0.0 ppb (0) 23.0 ppb (22) 0.26 ppb (4) N/A 2.0 μg/m3 (9) 22.0
 
March 6, 2021, 1 a.m. N/A 0.8 ppb (1) 15.2 ppb (15) 15.0 ppb (15) N/A 0.0 ppb (0) 28.0 ppb (26) 0.23 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
March 6, 2021, midnight N/A 0.5 ppb (1) 7.9 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 34.0
 
March 5, 2021, 11 p.m. N/A 0.4 ppb (1) 5.9 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 36.0
 
March 5, 2021, 10 p.m. N/A 0.9 ppb (1) 7.6 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 32.0
 
March 5, 2021, 9 p.m. N/A 1.3 ppb (2) 10.9 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 31.0 ppb (29) 0.19 ppb (3) N/A 2.0 μg/m3 (9) 29.0
 
March 5, 2021, 8 p.m. N/A 1.0 ppb (1) 8.7 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
March 5, 2021, 7 p.m. N/A 0.7 ppb (1) 7.4 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
March 5, 2021, 6 p.m. N/A 0.4 ppb (1) 4.5 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 39.0
 
March 5, 2021, 5 p.m. N/A 1.0 ppb (1) 8.8 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 33.0
 
March 5, 2021, 4 p.m. N/A 2.5 ppb (3) 21.1 ppb (20) 19.0 ppb (18) N/A 0.0 ppb (0) 18.0 ppb (17) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
March 5, 2021, 3 p.m. N/A 3.2 ppb (4) 22.0 ppb (21) 19.0 ppb (18) N/A 0.0 ppb (0) 9.0 ppb (9) 0.27 ppb (4) N/A 4.0 μg/m3 (17) 21.0
 
March 5, 2021, 2 p.m. N/A 0.7 ppb (1) 18.0 ppb (17) 17.0 ppb (17) N/A 0.0 ppb (0) 7.0 ppb (7) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 5, 2021, 1 p.m. N/A 0.4 ppb (1) 14.0 ppb (14) 14.0 ppb (14) N/A 0.0 ppb (0) 14.0 ppb (13) 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 5, 2021, noon N/A 0.7 ppb (1) 18.9 ppb (18) 16.0 ppb (16) N/A 0.0 ppb (0) 9.0 ppb (9) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 5, 2021, 11 a.m. N/A 4.6 ppb (5) 31.2 ppb (30) N/A N/A 0.0 ppb (0) 3.0 ppb (3) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
March 5, 2021, 10 a.m. N/A 3.1 ppb (3) 19.3 ppb (19) 17.0 ppb (17) N/A 0.0 ppb (0) 14.0 ppb (13) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 19.0
 
March 5, 2021, 9 a.m. N/A 0.0 ppb (0) 4.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (22) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 22.0
 
March 5, 2021, 8 a.m. N/A 0.0 ppb (0) 3.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (25) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
March 5, 2021, 7 a.m. N/A 0.1 ppb (1) 5.4 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
March 5, 2021, 6 a.m. N/A 0.2 ppb (1) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 29.0
 
March 5, 2021, 5 a.m. N/A 0.2 ppb (1) 4.5 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
March 5, 2021, 4 a.m. N/A 0.2 ppb (1) 6.1 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (30) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
March 5, 2021, 3 a.m. N/A 0.1 ppb (1) 9.4 ppb (9) 9.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (27) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 27.0
 
March 5, 2021, 2 a.m. N/A 0.3 ppb (1) 12.3 ppb (12) 12.0 ppb (12) N/A 0.0 ppb (0) 27.0 ppb (25) 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 5, 2021, 1 a.m. N/A 0.8 ppb (1) 18.5 ppb (18) 18.0 ppb (17) N/A 0.0 ppb (0) 19.0 ppb (18) 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
March 5, 2021, midnight N/A 1.8 ppb (2) 21.0 ppb (20) 19.0 ppb (18) N/A 0.0 ppb (0) 18.0 ppb (17) 0.38 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 11 p.m. N/A 1.2 ppb (2) 20.0 ppb (19) 19.0 ppb (18) N/A 0.0 ppb (0) 19.0 ppb (18) 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 4, 2021, 10 p.m. N/A 1.9 ppb (2) 17.3 ppb (17) 15.0 ppb (15) N/A 0.0 ppb (0) 22.0 ppb (21) 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 9 p.m. N/A 2.9 ppb (3) 18.2 ppb (18) 15.0 ppb (15) N/A 0.0 ppb (0) 21.0 ppb (20) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 8 p.m. N/A 3.9 ppb (4) 17.4 ppb (17) 13.0 ppb (13) N/A 0.0 ppb (0) 21.0 ppb (20) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 7 p.m. N/A 3.8 ppb (4) 12.8 ppb (13) 8.0 ppb (8) N/A 0.0 ppb (0) 23.0 ppb (22) 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 4, 2021, 6 p.m. N/A 4.3 ppb (5) 13.4 ppb (13) 8.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (21) 0.21 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 5 p.m. N/A 6.7 ppb (7) 20.5 ppb (20) 13.0 ppb (13) N/A 0.0 ppb (0) 17.0 ppb (16) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 4 p.m. N/A 9.6 ppb (10) 29.8 ppb (29) 20.0 ppb (19) N/A 0.0 ppb (0) 10.0 ppb (10) 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 3 p.m. N/A 9.8 ppb (10) 33.8 ppb (32) 24.0 ppb (23) N/A 0.0 ppb (0) 6.0 ppb (6) 0.31 ppb (4) N/A 7.0 μg/m3 (30) 32.0
 
March 4, 2021, 2 p.m. N/A 3.2 ppb (4) 26.3 ppb (25) 23.0 ppb (22) N/A 0.0 ppb (0) 8.0 ppb (8) 0.26 ppb (4) N/A 5.0 μg/m3 (21) 25.0
 
March 4, 2021, 1 p.m. N/A 1.0 ppb (1) 20.4 ppb (20) 18.0 ppb (17) N/A 0.0 ppb (0) 13.0 ppb (13) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 4, 2021, noon N/A 0.8 ppb (1) 17.3 ppb (17) N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 4, 2021, 11 a.m. N/A 0.6 ppb (1) 17.2 ppb (17) N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 4, 2021, 10 a.m. N/A 1.0 ppb (1) 14.8 ppb (14) 13.0 ppb (13) N/A 0.0 ppb (0) 19.0 ppb (18) 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 4, 2021, 9 a.m. N/A 0.3 ppb (1) 11.1 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 20.0 ppb (19) 0.22 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 8 a.m. N/A 1.5 ppb (2) 22.9 ppb (22) 20.0 ppb (19) N/A 0.0 ppb (0) 11.0 ppb (11) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 7 a.m. N/A 2.5 ppb (3) 33.6 ppb (32) 30.0 ppb (29) N/A 0.0 ppb (0) 4.0 ppb (4) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 4, 2021, 6 a.m. N/A 5.4 ppb (6) 34.2 ppb (33) 29.0 ppb (28) N/A 0.0 ppb (0) 5.0 ppb (5) 0.28 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 5 a.m. N/A 0.7 ppb (1) 17.2 ppb (17) 15.0 ppb (15) N/A 0.0 ppb (0) 16.0 ppb (15) 0.29 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 4 a.m. N/A 4.8 ppb (5) 31.5 ppb (30) 25.0 ppb (24) N/A 0.0 ppb (0) 9.0 ppb (9) 0.34 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 3 a.m. N/A 15.2 ppb (15) 49.2 ppb (47) 34.0 ppb (33) N/A 1.0 ppb (2) 6.0 ppb (6) 0.31 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 2 a.m. N/A 3.5 ppb (4) 31.3 ppb (30) 28.0 ppb (27) N/A 1.0 ppb (2) 14.0 ppb (13) 0.35 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 1 a.m. N/A 0.3 ppb (1) 9.5 ppb (9) 9.0 ppb (9) N/A 1.0 ppb (2) 34.0 ppb (32) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 32.0
 
March 4, 2021, midnight N/A 4.5 ppb (5) 18.1 ppb (18) 12.0 ppb (12) N/A 1.0 ppb (2) 29.0 ppb (27) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
March 3, 2021, 11 p.m. N/A 12.5 ppb (12) 34.9 ppb (33) 23.0 ppb (22) N/A 2.0 ppb (3) 20.0 ppb (19) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 33.0
 
March 3, 2021, 10 p.m. N/A 22.6 ppb (22) 49.2 ppb (47) 27.0 ppb (26) N/A 2.0 ppb (3) 15.0 ppb (14) 0.25 ppb (3) N/A 7.0 μg/m3 (30) 47.0
 
March 3, 2021, 9 p.m. N/A 17.5 ppb (17) 39.0 ppb (37) 22.0 ppb (21) N/A 1.0 ppb (2) 18.0 ppb (17) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 37.0
 
March 3, 2021, 8 p.m. N/A 43.5 ppb (42) 69.1 ppb (68) 25.0 ppb (24) N/A 2.0 ppb (3) 11.0 ppb (11) 0.3 ppb (4) N/A 9.0 μg/m3 (38) 68.0
 
March 3, 2021, 7 p.m. N/A 37.1 ppb (35) 60.9 ppb (59) 24.0 ppb (23) N/A 1.0 ppb (2) 12.0 ppb (12) 0.36 ppb (5) N/A 15.0 μg/m3 (58) 59.0
 
March 3, 2021, 6 p.m. N/A 26.0 ppb (25) 45.5 ppb (43) 19.0 ppb (18) N/A 1.0 ppb (2) 11.0 ppb (11) 0.33 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 5 p.m. N/A 38.2 ppb (37) 61.2 ppb (59) 22.0 ppb (21) N/A 2.0 ppb (3) 8.0 ppb (8) 0.46 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
March 3, 2021, 4 p.m. N/A 14.3 ppb (14) 28.5 ppb (27) 14.0 ppb (14) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 5.0 μg/m3 (21) 27.0
 
March 3, 2021, 3 p.m. N/A 11.5 ppb (11) 28.0 ppb (27) 16.0 ppb (16) N/A 0.0 ppb (0) 4.0 ppb (4) 0.31 ppb (4) N/A 5.0 μg/m3 (21) 27.0
 
March 3, 2021, 2 p.m. N/A 14.6 ppb (14) 33.6 ppb (32) 19.0 ppb (18) N/A 0.0 ppb (0) 3.0 ppb (3) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 32.0
 
March 3, 2021, 1 p.m. N/A 9.1 ppb (9) 25.9 ppb (25) 17.0 ppb (17) N/A 0.0 ppb (0) 2.0 ppb (2) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 3, 2021, noon N/A 2.6 ppb (3) 18.7 ppb (18) 16.0 ppb (16) N/A 0.0 ppb (0) 3.0 ppb (3) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 3, 2021, 11 a.m. N/A 1.3 ppb (2) 13.0 ppb (13) 12.0 ppb (12) N/A 0.0 ppb (0) 6.0 ppb (6) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 3, 2021, 10 a.m. N/A 0.5 ppb (1) 19.0 ppb (18) 18.0 ppb (17) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 9 a.m. N/A 2.2 ppb (3) 22.2 ppb (21) 19.0 ppb (18) N/A 0.0 ppb (0) 8.0 ppb (8) 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 8 a.m. N/A 0.1 ppb (1) 16.9 ppb (16) 16.0 ppb (16) N/A 0.0 ppb (0) 9.0 ppb (9) 0.29 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, 7 a.m. N/A 0.1 ppb (1) 17.1 ppb (17) 17.0 ppb (17) N/A N/A 11.0 ppb (11) 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
March 3, 2021, 6 a.m. N/A 0.2 ppb (1) 14.1 ppb (14) 14.0 ppb (14) N/A N/A 14.0 ppb (13) 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 5 a.m. N/A 0.7 ppb (1) 13.5 ppb (13) 12.0 ppb (12) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 4 a.m. N/A 1.2 ppb (2) 16.7 ppb (16) 15.0 ppb (15) N/A 0.0 ppb (0) 15.0 ppb (14) 0.43 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
March 3, 2021, 3 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 20.0 ppb (19) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 3, 2021, 2 a.m. N/A 0.5 ppb (1) 15.8 ppb (15) 15.0 ppb (15) N/A 0.0 ppb (0) 21.0 ppb (20) 0.28 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 3, 2021, 1 a.m. N/A 1.4 ppb (2) 17.1 ppb (17) 15.0 ppb (15) N/A 0.0 ppb (0) 24.0 ppb (23) 0.29 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
March 3, 2021, midnight N/A 2.0 ppb (2) 14.8 ppb (14) 13.0 ppb (13) N/A 0.0 ppb (0) 28.0 ppb (26) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 26.0
 
March 2, 2021, 11 p.m. N/A 3.4 ppb (4) 16.0 ppb (16) 13.0 ppb (13) N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 27.0
 
March 2, 2021, 10 p.m. N/A 3.5 ppb (4) 15.6 ppb (15) 12.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 27.0
 
March 2, 2021, 9 p.m. N/A 2.5 ppb (3) 11.8 ppb (12) 9.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (29) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
March 2, 2021, 8 p.m. N/A 1.5 ppb (2) 7.0 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 32.0
 
March 2, 2021, 7 p.m. N/A 0.8 ppb (1) 5.6 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 34.0
 
March 2, 2021, 6 p.m. N/A 0.5 ppb (1) 6.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
March 2, 2021, 5 p.m. N/A 0.4 ppb (1) 8.1 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 32.0 ppb (30) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 30.0
 
March 2, 2021, 3 p.m. N/A 0.1 ppb (1) 5.1 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
March 2, 2021, 2 p.m. N/A 5.3 ppb (5) 3.6 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 32.0
 
March 2, 2021, 1 p.m. N/A 0.0 ppb (0) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 31.0
 
March 2, 2021, noon N/A 0.0 ppb (0) 3.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 30.0
 
March 2, 2021, 11 a.m. N/A 0.0 ppb (0) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 33.0
 
March 2, 2021, 10 a.m. N/A 0.0 ppb (0) 3.5 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 32.0
 
March 2, 2021, 9 a.m. N/A 0.2 ppb (1) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
March 2, 2021, 8 a.m. N/A 0.0 ppb (0) 7.6 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (27) 0.18 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 7 a.m. N/A 1.1 ppb (2) 31.5 ppb (30) 30.0 ppb (29) N/A 0.0 ppb (0) 8.0 ppb (8) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 6 a.m. N/A 0.1 ppb (1) 10.9 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 24.0 ppb (23) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 5 a.m. N/A 0.0 ppb (0) 9.3 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (24) 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 4 a.m. N/A 0.5 ppb (1) 17.8 ppb (17) 17.0 ppb (17) N/A 0.0 ppb (0) 13.0 ppb (13) 0.29 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 3 a.m. N/A 4.2 ppb (4) 32.5 ppb (31) 28.0 ppb (27) N/A 0.0 ppb (0) 6.0 ppb (6) 0.28 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 2, 2021, 2 a.m. N/A 0.8 ppb (1) 14.3 ppb (14) 14.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (22) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 2, 2021, 1 a.m. N/A 0.1 ppb (1) 8.4 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
March 2, 2021, midnight N/A 0.2 ppb (1) 5.4 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 11 p.m. N/A 1.2 ppb (2) 7.0 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 34.0
 
March 1, 2021, 10 p.m. N/A 2.9 ppb (3) 11.0 ppb (11) 8.0 ppb (8) N/A 0.0 ppb (0) 23.0 ppb (22) 0.19 ppb (3) N/A 2.0 μg/m3 (9) 22.0
 
March 1, 2021, 9 p.m. N/A 2.4 ppb (3) 8.7 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (13) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 13.0
 
March 1, 2021, 8 p.m. N/A 3.9 ppb (4) 13.0 ppb (13) 9.0 ppb (9) N/A 0.0 ppb (0) 11.0 ppb (11) 0.19 ppb (3) N/A 2.0 μg/m3 (9) 13.0
 
March 1, 2021, 7 p.m. N/A 7.8 ppb (8) 20.8 ppb (20) 13.0 ppb (13) N/A 1.0 ppb (2) 7.0 ppb (7) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 1, 2021, 6 p.m. N/A 17.8 ppb (17) 38.6 ppb (37) 21.0 ppb (20) N/A 1.0 ppb (2) 3.0 ppb (3) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 37.0
 
March 1, 2021, 5 p.m. N/A 10.8 ppb (11) 27.0 ppb (26) 17.0 ppb (17) N/A 0.0 ppb (0) 3.0 ppb (3) 0.29 ppb (4) N/A 5.0 μg/m3 (21) 26.0
 
March 1, 2021, 4 p.m. N/A 15.0 ppb (15) 31.5 ppb (30) 16.0 ppb (16) N/A 0.0 ppb (0) N/A 0.3 ppb (4) N/A 4.0 μg/m3 (17) 30.0
 
March 1, 2021, 3 p.m. N/A 6.2 ppb (6) 16.8 ppb (16) 11.0 ppb (11) N/A 0.0 ppb (0) 8.0 ppb (8) 0.19 ppb (3) N/A 0.0 μg/m3 (0) 16.0
 
March 1, 2021, 2 p.m. N/A 0.3 ppb (1) 8.1 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 8.0 ppb (8) 0.18 ppb (3) N/A -1.0 μg/m3 (0) 8.0
 
March 1, 2021, 1 p.m. N/A 0.2 ppb (1) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (9) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 9.0
 
March 1, 2021, noon N/A 0.4 ppb (1) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 10.0 ppb (10) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 10.0
 
March 1, 2021, 11 a.m. N/A 0.3 ppb (1) 6.8 ppb (7) N/A N/A 0.0 ppb (0) 10.0 ppb (10) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 10.0
 
March 1, 2021, 10 a.m. N/A 0.7 ppb (1) 8.3 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 9.0 ppb (9) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 1, 2021, 9 a.m. N/A 0.6 ppb (1) 9.9 ppb (10) 9.0 ppb (9) N/A 0.0 ppb (0) 8.0 ppb (8) 0.19 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 1, 2021, 8 a.m. N/A 0.7 ppb (1) 8.8 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 9.0 ppb (9) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 1, 2021, 7 a.m. N/A 0.3 ppb (1) 9.3 ppb (9) 9.0 ppb (9) N/A 0.0 ppb (0) 8.0 ppb (8) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 1, 2021, 6 a.m. N/A 0.3 ppb (1) 10.4 ppb (10) 10.0 ppb (10) N/A 0.0 ppb (0) 9.0 ppb (9) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 1, 2021, 5 a.m. N/A 0.2 ppb (1) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (13) 0.21 ppb (3) N/A 1.0 μg/m3 (5) 13.0
 
March 1, 2021, 4 a.m. N/A 0.0 ppb (0) 6.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (13) 0.22 ppb (3) N/A 178.0 μg/m3 (229) 229.0
 
March 1, 2021, 3 a.m. N/A 0.1 ppb (1) 6.9 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 1, 2021, 2 a.m. N/A 0.0 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (17) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 1, 2021, 1 a.m. N/A 0.0 ppb (0) 3.6 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (19) 0.19 ppb (3) N/A 2.0 μg/m3 (9) 19.0
 
March 1, 2021, midnight N/A 0.1 ppb (1) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (20) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 20.0
 
Feb. 28, 2021, 11 p.m. N/A 0.4 ppb (1) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.18 ppb (3) N/A 0.0 μg/m3 (0) 21.0
 
Feb. 28, 2021, 10 p.m. N/A 0.3 ppb (1) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.18 ppb (3) N/A 0.0 μg/m3 (0) 21.0
 
Feb. 28, 2021, 9 p.m. N/A 0.7 ppb (1) 4.7 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (19) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 19.0
 
Feb. 28, 2021, 8 p.m. N/A 1.3 ppb (2) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (18) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 18.0
 
Feb. 28, 2021, 7 p.m. N/A 1.3 ppb (2) 7.7 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (17) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 17.0
 
Feb. 28, 2021, 6 p.m. N/A 0.7 ppb (1) 5.1 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (18) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
Feb. 28, 2021, 5 p.m. N/A 1.0 ppb (1) 8.4 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 17.0 ppb (16) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 16.0
 
Feb. 28, 2021, 4 p.m. N/A 0.4 ppb (1) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (16) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 16.0
 
Feb. 28, 2021, 3 p.m. N/A 0.2 ppb (1) 7.4 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 16.0 ppb (15) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 15.0
 
Feb. 28, 2021, 2 p.m. N/A 0.1 ppb (1) 6.6 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 15.0
 
Feb. 28, 2021, 1 p.m. N/A 0.1 ppb (1) 5.9 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 15.0
 
Feb. 28, 2021, noon N/A 0.1 ppb (1) 6.2 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (15) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 15.0
 
Feb. 28, 2021, 11 a.m. N/A 0.4 ppb (1) 8.6 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 15.0 ppb (14) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 14.0
 
Feb. 28, 2021, 10 a.m. N/A 0.4 ppb (1) 6.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.18 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 28, 2021, 9 a.m. N/A 0.5 ppb (1) 11.1 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 16.0 ppb (15) 0.18 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 8 a.m. N/A 0.1 ppb (1) 5.5 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (19) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 28, 2021, 7 a.m. N/A 0.0 ppb (0) 2.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (22) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 22.0
 
Feb. 28, 2021, 6 a.m. N/A 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 5 a.m. N/A 0.0 ppb (0) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 28, 2021, 4 a.m. N/A 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 3 a.m. N/A 0.0 ppb (0) 3.5 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (22) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 2 a.m. N/A 0.0 ppb (0) 5.6 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 21.0 ppb (20) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 28, 2021, 1 a.m. N/A 0.3 ppb (1) 4.5 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (21) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 21.0
 
Feb. 28, 2021, midnight N/A 0.4 ppb (1) 4.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (22) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
Feb. 27, 2021, 11 p.m. N/A 1.0 ppb (1) 5.4 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (23) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Feb. 27, 2021, 10 p.m. N/A 0.7 ppb (1) 4.4 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
Feb. 27, 2021, 9 p.m. N/A 1.3 ppb (2) 7.0 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 23.0 ppb (22) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
Feb. 27, 2021, 8 p.m. N/A 1.7 ppb (2) 7.6 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (21) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 7 p.m. N/A 2.0 ppb (2) 10.4 ppb (10) 8.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (18) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 6 p.m. N/A 1.5 ppb (2) 8.6 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 18.0 ppb (17) 0.21 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 5 p.m. N/A 4.3 ppb (5) 14.0 ppb (14) 9.0 ppb (9) N/A 0.0 ppb (0) 12.0 ppb (12) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 27, 2021, 4 p.m. N/A 5.0 ppb (5) 18.1 ppb (18) 12.0 ppb (12) N/A 0.0 ppb (0) 10.0 ppb (10) 0.26 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 27, 2021, 3 p.m. N/A 1.0 ppb (1) 12.7 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 11.0 ppb (11) 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 2 p.m. N/A 0.1 ppb (1) 11.8 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 12.0 ppb (12) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 1 p.m. N/A 0.1 ppb (1) 9.5 ppb (9) 9.0 ppb (9) N/A 0.0 ppb (0) 14.0 ppb (13) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Feb. 27, 2021, noon N/A 0.8 ppb (1) 9.4 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 15.0 ppb (14) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 14.0
 
Feb. 27, 2021, 11 a.m. N/A 0.7 ppb (1) 9.2 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 15.0 ppb (14) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 14.0
 
Feb. 27, 2021, 10 a.m. N/A 0.7 ppb (1) 11.6 ppb (11) 11.0 ppb (11) N/A 0.0 ppb (0) 13.0 ppb (13) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 9 a.m. N/A 0.3 ppb (1) 12.3 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 15.0 ppb (14) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 8 a.m. N/A 0.1 ppb (1) 6.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (19) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 27, 2021, 7 a.m. N/A 0.1 ppb (1) 6.2 ppb (6) 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
Feb. 27, 2021, 6 a.m. N/A 0.2 ppb (1) 5.8 ppb (6) 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 21.0