ID: 497

AQSQID: 260810020

Site Name: Grand Rapids

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

Updated: Sept. 22, 2021, 9:03 a.m.

Location: Grand Rapids (Belknap Lookout), MI

Reporting: True, Located: True

Current AQI: 13.0

Grand Rapids (Belknap Lookout) MI, US: 42.984699, -85.671097

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 22, 2021, 7 a.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) N/A 0.25 ppb (3) 8.0 μg/m3 (8) 3.1 μg/m3 (13) 13.0
 
Sept. 22, 2021, 6 a.m. N/A N/A 3.9 ppb (4) N/A N/A N/A 21.0 ppb (20) 0.25 ppb (3) 12.0 μg/m3 (12) 6.3 μg/m3 (27) 27.0
 
Sept. 22, 2021, 5 a.m. N/A N/A 3.4 ppb (4) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.27 ppb (4) 8.0 μg/m3 (8) 3.1 μg/m3 (13) 22.0
 
Sept. 22, 2021, 4 a.m. N/A N/A 3.3 ppb (4) N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.22 ppb (3) 8.0 μg/m3 (8) 3.2 μg/m3 (14) 23.0
 
Sept. 22, 2021, 3 a.m. N/A N/A 5.4 ppb (6) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) 8.0 μg/m3 (8) 3.2 μg/m3 (14) 22.0
 
Sept. 22, 2021, 2 a.m. N/A N/A 4.6 ppb (5) N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.29 ppb (4) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 26.0
 
Sept. 22, 2021, 1 a.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.25 ppb (3) 8.0 μg/m3 (8) 2.4 μg/m3 (10) 25.0
 
Sept. 22, 2021, midnight N/A N/A 4.7 ppb (5) N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.26 ppb (4) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 24.0
 
Sept. 21, 2021, 11 p.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.28 ppb (4) 9.0 μg/m3 (9) 3.7 μg/m3 (16) 22.0
 
Sept. 21, 2021, 10 p.m. N/A N/A 7.1 ppb (7) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.29 ppb (4) 9.0 μg/m3 (9) 3.7 μg/m3 (16) 22.0
 
Sept. 21, 2021, 9 p.m. N/A N/A 8.7 ppb (9) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.32 ppb (4) 10.0 μg/m3 (10) 4.3 μg/m3 (18) 22.0
 
Sept. 21, 2021, 8 p.m. N/A N/A 11.7 ppb (12) N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.33 ppb (4) 10.0 μg/m3 (10) 4.6 μg/m3 (20) 20.0
 
Sept. 21, 2021, 7 p.m. N/A N/A 8.5 ppb (9) N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.29 ppb (4) 9.0 μg/m3 (9) 4.3 μg/m3 (18) 20.0
 
Sept. 21, 2021, 6 p.m. N/A N/A 7.7 ppb (8) N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.28 ppb (4) 9.0 μg/m3 (9) 4.2 μg/m3 (18) 18.0
 
Sept. 21, 2021, 5 p.m. N/A N/A 9.2 ppb (9) N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.28 ppb (4) 9.0 μg/m3 (9) 4.2 μg/m3 (18) 18.0
 
Sept. 21, 2021, 4 p.m. N/A N/A 8.8 ppb (9) N/A N/A 0.0 ppb (0) 20.0 ppb (19) 0.28 ppb (4) 8.0 μg/m3 (8) 3.7 μg/m3 (16) 19.0
 
Sept. 21, 2021, 3 p.m. N/A N/A 6.7 ppb (7) N/A N/A 0.0 ppb (0) 20.0 ppb (19) 0.26 ppb (4) 5.0 μg/m3 (5) 2.9 μg/m3 (13) 19.0
 
Sept. 21, 2021, 2 p.m. N/A N/A 6.1 ppb (6) N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.26 ppb (4) 5.0 μg/m3 (5) 2.8 μg/m3 (12) 18.0
 
Sept. 21, 2021, 1 p.m. N/A N/A 7.0 ppb (7) N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.23 ppb (3) 5.0 μg/m3 (5) 2.1 μg/m3 (9) 30.0
 
Sept. 21, 2021, noon N/A N/A 8.8 ppb (9) N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.24 ppb (3) 5.0 μg/m3 (5) 2.6 μg/m3 (11) 30.0
 
Sept. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.22 ppb (3) 8.0 μg/m3 (8) 4.3 μg/m3 (18) 29.0
 
Sept. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.21 ppb (3) 10.0 μg/m3 (10) 5.4 μg/m3 (23) 23.0
 
Sept. 21, 2021, 9 a.m. N/A N/A 5.4 ppb (6) N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.2 ppb (3) 11.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2021, 8 a.m. N/A N/A 4.9 ppb (5) N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 10.0 μg/m3 (10) 4.8 μg/m3 (20) 20.0
 
Sept. 21, 2021, 7 a.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) N/A 0.2 ppb (3) 9.0 μg/m3 (9) 4.7 μg/m3 (20) 20.0
 
Sept. 21, 2021, 6 a.m. N/A N/A 2.4 ppb (3) N/A N/A N/A 24.0 ppb (23) 0.19 ppb (3) 9.0 μg/m3 (9) 4.9 μg/m3 (21) 23.0
 
Sept. 21, 2021, 5 a.m. N/A N/A 3.3 ppb (4) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.2 ppb (3) 9.0 μg/m3 (9) 5.0 μg/m3 (21) 22.0
 
Sept. 21, 2021, 4 a.m. N/A N/A 4.9 ppb (5) N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.2 ppb (3) 8.0 μg/m3 (8) 4.6 μg/m3 (20) 21.0
 
Sept. 21, 2021, 3 a.m. N/A N/A 4.4 ppb (5) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.2 ppb (3) 8.0 μg/m3 (8) 3.5 μg/m3 (15) 22.0
 
Sept. 21, 2021, 2 a.m. N/A N/A 3.3 ppb (4) N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.2 ppb (3) 7.0 μg/m3 (7) 2.9 μg/m3 (13) 24.0
 
Sept. 21, 2021, 1 a.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.19 ppb (3) 8.0 μg/m3 (8) 2.6 μg/m3 (11) 24.0
 
Sept. 21, 2021, midnight N/A N/A 3.7 ppb (4) N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.2 ppb (3) 8.0 μg/m3 (8) 3.5 μg/m3 (15) 24.0
 
Sept. 20, 2021, 11 p.m. N/A N/A 4.3 ppb (5) N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.23 ppb (3) 8.0 μg/m3 (8) 4.4 μg/m3 (19) 23.0
 
Sept. 20, 2021, 10 p.m. N/A N/A 6.4 ppb (7) N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.25 ppb (3) 10.0 μg/m3 (10) 5.2 μg/m3 (22) 23.0
 
Sept. 20, 2021, 9 p.m. N/A N/A 7.4 ppb (7) N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.25 ppb (3) 9.0 μg/m3 (9) 4.8 μg/m3 (20) 23.0
 
Sept. 20, 2021, 8 p.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.25 ppb (3) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2021, 7 p.m. N/A N/A 8.9 ppb (9) N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.25 ppb (3) 15.0 μg/m3 (14) 6.7 μg/m3 (28) 28.0
 
Sept. 20, 2021, 6 p.m. N/A N/A 11.8 ppb (12) N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.26 ppb (4) 17.0 μg/m3 (16) 8.9 μg/m3 (38) 38.0
 
Sept. 20, 2021, 5 p.m. N/A N/A 8.3 ppb (8) N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.27 ppb (4) 17.0 μg/m3 (16) 9.7 μg/m3 (41) 41.0
 
Sept. 20, 2021, 4 p.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.28 ppb (4) 16.0 μg/m3 (15) 9.6 μg/m3 (40) 40.0
 
Sept. 20, 2021, 3 p.m. N/A N/A 9.7 ppb (10) N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.3 ppb (4) 21.0 μg/m3 (20) 10.8 μg/m3 (46) 46.0
 
Sept. 20, 2021, 2 p.m. N/A N/A 11.2 ppb (11) N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.31 ppb (4) 21.0 μg/m3 (20) 10.6 μg/m3 (45) 45.0
 
Sept. 20, 2021, 1 p.m. N/A N/A 10.4 ppb (10) N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.3 ppb (4) 23.0 μg/m3 (22) 10.8 μg/m3 (46) 46.0
 
Sept. 20, 2021, noon N/A N/A 14.1 ppb (14) N/A N/A 1.0 ppb (2) 24.0 ppb (23) 0.37 ppb (5) 21.0 μg/m3 (20) 10.4 μg/m3 (44) 44.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.34 ppb (4) 22.0 μg/m3 (21) 9.8 μg/m3 (41) 41.0
 
Sept. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.26 ppb (4) 17.0 μg/m3 (16) 9.5 μg/m3 (40) 40.0
 
Sept. 20, 2021, 9 a.m. N/A N/A 4.9 ppb (5) N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.24 ppb (3) 22.0 μg/m3 (21) 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2021, 8 a.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A 17.0 μg/m3 (16) 10.1 μg/m3 (43) 43.0
 
Sept. 20, 2021, 7 a.m. N/A N/A 3.8 ppb (4) N/A N/A 1.0 ppb (2) N/A 0.23 ppb (3) 16.0 μg/m3 (15) 9.6 μg/m3 (40) 40.0
 
Sept. 20, 2021, 6 a.m. N/A N/A 3.5 ppb (4) N/A N/A N/A 45.0 ppb (42) 0.23 ppb (3) 18.0 μg/m3 (17) 9.8 μg/m3 (41) 42.0
 
Sept. 20, 2021, 5 a.m. N/A N/A 3.3 ppb (4) N/A N/A 1.0 ppb (2) 47.0 ppb (44) 0.23 ppb (3) 19.0 μg/m3 (18) 10.3 μg/m3 (43) 44.0
 
Sept. 20, 2021, 4 a.m. N/A N/A 3.2 ppb (4) N/A N/A 0.0 ppb (0) 47.0 ppb (44) 0.24 ppb (3) 19.0 μg/m3 (18) 10.7 μg/m3 (45) 45.0
 
Sept. 20, 2021, 3 a.m. N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.24 ppb (3) 18.0 μg/m3 (17) 10.3 μg/m3 (43) 43.0
 
Sept. 20, 2021, 2 a.m. N/A N/A 3.8 ppb (4) N/A N/A 0.0 ppb (0) 44.0 ppb (41) 0.26 ppb (4) 20.0 μg/m3 (19) 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2021, 1 a.m. N/A N/A 5.3 ppb (5) N/A N/A 0.0 ppb (0) 43.0 ppb (40) 0.31 ppb (4) 22.0 μg/m3 (21) 11.6 μg/m3 (49) 49.0
 
Sept. 20, 2021, midnight N/A N/A 7.8 ppb (8) N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.35 ppb (4) 23.0 μg/m3 (22) 11.7 μg/m3 (49) 49.0
 
Sept. 19, 2021, 11 p.m. N/A N/A 5.5 ppb (6) N/A N/A 0.0 ppb (0) 47.0 ppb (44) 0.31 ppb (4) 23.0 μg/m3 (22) 11.0 μg/m3 (46) 46.0
 
Sept. 19, 2021, 10 p.m. N/A N/A 3.8 ppb (4) N/A N/A 0.0 ppb (0) 52.0 ppb (49) 0.26 ppb (4) 22.0 μg/m3 (21) 10.7 μg/m3 (45) 49.0
 
Sept. 19, 2021, 9 p.m. N/A N/A 3.3 ppb (4) N/A N/A 0.0 ppb (0) 55.0 ppb (51) 0.23 ppb (3) 20.0 μg/m3 (19) 10.2 μg/m3 (43) 51.0
 
Sept. 19, 2021, 8 p.m. N/A N/A 3.4 ppb (4) N/A N/A 0.0 ppb (0) 55.0 ppb (51) 0.23 ppb (3) 21.0 μg/m3 (20) 9.7 μg/m3 (41) 51.0
 
Sept. 19, 2021, 7 p.m. N/A N/A 3.3 ppb (4) N/A N/A 0.0 ppb (0) 55.0 ppb (51) 0.23 ppb (3) 20.0 μg/m3 (19) 9.7 μg/m3 (41) 51.0
 
Sept. 19, 2021, 6 p.m. N/A N/A 3.4 ppb (4) N/A N/A 1.0 ppb (2) 50.0 ppb (47) 0.23 ppb (3) 18.0 μg/m3 (17) 8.2 μg/m3 (35) 47.0
 
Sept. 19, 2021, 5 p.m. N/A N/A 3.8 ppb (4) N/A N/A 1.0 ppb (2) 42.0 ppb (39) 0.23 ppb (3) 15.0 μg/m3 (14) 6.9 μg/m3 (29) 39.0
 
Sept. 19, 2021, 4 p.m. N/A N/A 4.2 ppb (4) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.24 ppb (3) 14.0 μg/m3 (13) 6.2 μg/m3 (26) 32.0
 
Sept. 19, 2021, 3 p.m. N/A N/A 4.4 ppb (5) N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.24 ppb (3) 14.0 μg/m3 (13) 5.6 μg/m3 (24) 26.0
 
Sept. 19, 2021, 2 p.m. N/A N/A 4.4 ppb (5) N/A N/A 1.0 ppb (2) 21.0 ppb (20) 0.23 ppb (3) 14.0 μg/m3 (13) 5.2 μg/m3 (22) 22.0
 
Sept. 19, 2021, 1 p.m. N/A N/A 4.8 ppb (5) N/A N/A 1.0 ppb (2) 17.0 ppb (16) 0.23 ppb (3) 15.0 μg/m3 (14) 5.3 μg/m3 (23) 23.0
 
Sept. 19, 2021, noon N/A N/A 5.1 ppb (5) N/A N/A 1.0 ppb (2) 15.0 ppb (14) 0.23 ppb (3) 13.0 μg/m3 (13) 5.7 μg/m3 (24) 24.0
 
Sept. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) 0.24 ppb (3) 16.0 μg/m3 (15) 6.6 μg/m3 (28) 28.0
 
Sept. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) 0.22 ppb (3) 15.0 μg/m3 (14) 5.9 μg/m3 (25) 25.0
 
Sept. 19, 2021, 9 a.m. N/A N/A 2.9 ppb (3) N/A N/A 0.0 ppb (0) 18.0 ppb (17) 0.22 ppb (3) 13.0 μg/m3 (13) 5.9 μg/m3 (25) 25.0
 
Sept. 19, 2021, 8 a.m. N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 19.0 ppb (18) N/A 16.0 μg/m3 (15) 6.1 μg/m3 (26) 26.0
 
Sept. 19, 2021, 7 a.m. N/A N/A 4.4 ppb (5) N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) 17.0 μg/m3 (16) 6.3 μg/m3 (27) 27.0
 
Sept. 19, 2021, 6 a.m. N/A N/A 4.6 ppb (5) N/A N/A N/A 21.0 ppb (20) 0.22 ppb (3) 17.0 μg/m3 (16) 5.6 μg/m3 (24) 24.0
 
Sept. 19, 2021, 5 a.m. N/A N/A 4.2 ppb (4) N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.23 ppb (3) 17.0 μg/m3 (16) 4.9 μg/m3 (21) 21.0
 
Sept. 19, 2021, 4 a.m. N/A N/A 3.3 ppb (4) N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.21 ppb (3) 19.0 μg/m3 (18) 4.6 μg/m3 (20) 23.0
 
Sept. 19, 2021, 3 a.m. N/A N/A 3.1 ppb (3) N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.21 ppb (3) 16.0 μg/m3 (15) 4.8 μg/m3 (20) 25.0
 
Sept. 19, 2021, 2 a.m. N/A N/A 5.3 ppb (5) N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.24 ppb (3) 18.0 μg/m3 (17) 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 1 a.m. N/A N/A 6.2 ppb (6) N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.26 ppb (4) 21.0 μg/m3 (20) 7.6 μg/m3 (32) 32.0
 
Sept. 19, 2021, midnight N/A N/A 8.4 ppb (8) N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.31 ppb (4) 19.0 μg/m3 (18) 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 11 p.m. N/A N/A 6.8 ppb (7) N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.25 ppb (3) 20.0 μg/m3 (19) 5.9 μg/m3 (25) 35.0
 
Sept. 18, 2021, 10 p.m. N/A N/A 6.1 ppb (6) N/A N/A 0.0 ppb (0) 41.0 ppb (38) 0.25 ppb (3) 19.0 μg/m3 (18) 5.8 μg/m3 (25) 38.0
 
Sept. 18, 2021, 9 p.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 43.0 ppb (40) 0.22 ppb (3) 16.0 μg/m3 (15) 5.8 μg/m3 (25) 40.0
 
Sept. 18, 2021, 8 p.m. N/A N/A 3.7 ppb (4) N/A N/A 0.0 ppb (0) 43.0 ppb (40) 0.22 ppb (3) 17.0 μg/m3 (16) 5.5 μg/m3 (23) 40.0
 
Sept. 18, 2021, 7 p.m. N/A N/A 4.2 ppb (4) N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.21 ppb (3) 18.0 μg/m3 (17) 5.2 μg/m3 (22) 38.0
 
Sept. 18, 2021, 6 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.2 ppb (3) 20.0 μg/m3 (19) 4.8 μg/m3 (20) 37.0
 
Sept. 18, 2021, 5 p.m. N/A N/A 3.4 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) 17.0 μg/m3 (16) 4.4 μg/m3 (19) 34.0
 
Sept. 18, 2021, 4 p.m. N/A N/A 3.2 ppb (4) N/A N/A 0.0 ppb (0) 34.0 ppb (32) 0.19 ppb (3) 16.0 μg/m3 (15) 4.1 μg/m3 (18) 32.0
 
Sept. 18, 2021, 3 p.m. N/A N/A 3.5 ppb (4) N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.2 ppb (3) 18.0 μg/m3 (17) 4.1 μg/m3 (18) 30.0
 
Sept. 18, 2021, 2 p.m. N/A N/A 3.4 ppb (4) N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.19 ppb (3) 17.0 μg/m3 (16) 4.1 μg/m3 (18) 28.0
 
Sept. 18, 2021, 1 p.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) 17.0 μg/m3 (16) 4.5 μg/m3 (19) 28.0
 
Sept. 18, 2021, noon N/A N/A 4.6 ppb (5) N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.22 ppb (3) 17.0 μg/m3 (16) 5.3 μg/m3 (23) 27.0
 
Sept. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.23 ppb (3) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 29.0
 
Sept. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.22 ppb (3) 13.0 μg/m3 (13) 5.7 μg/m3 (24) 31.0
 
Sept. 18, 2021, 9 a.m. N/A N/A 4.4 ppb (5) N/A N/A 0.0 ppb (0) 34.0 ppb (32) 0.23 ppb (3) 16.0 μg/m3 (15) 7.2 μg/m3 (31) 32.0
 
Sept. 18, 2021, 8 a.m. N/A N/A 4.6 ppb (5) N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A 14.0 μg/m3 (13) 7.1 μg/m3 (30) 33.0
 
Sept. 18, 2021, 7 a.m. N/A N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) N/A 0.26 ppb (4) 18.0 μg/m3 (17) 10.8 μg/m3 (46) 46.0
 
Sept. 18, 2021, 6 a.m. N/A N/A 5.4 ppb (6) N/A N/A N/A 45.0 ppb (42) 0.26 ppb (4) 20.0 μg/m3 (19) 12.8 μg/m3 (53) 53.0
 
Sept. 18, 2021, 5 a.m. N/A N/A 5.4 ppb (6) N/A N/A 0.0 ppb (0) 50.0 ppb (47) 0.26 ppb (4) 20.0 μg/m3 (19) 13.6 μg/m3 (55) 55.0
 
Sept. 18, 2021, 4 a.m. N/A N/A 10.5 ppb (10) N/A N/A 1.0 ppb (2) 50.0 ppb (47) 0.35 ppb (4) 26.0 μg/m3 (25) 15.1 μg/m3 (58) 58.0
 
Sept. 18, 2021, 3 a.m. N/A N/A 17.6 ppb (17) N/A N/A 1.0 ppb (2) 41.0 ppb (38) 0.46 ppb (6) 29.0 μg/m3 (27) 15.2 μg/m3 (58) 58.0
 
Sept. 18, 2021, 2 a.m. N/A N/A 13.3 ppb (13) N/A N/A 1.0 ppb (2) 49.0 ppb (46) 0.4 ppb (5) 24.0 μg/m3 (23) 13.9 μg/m3 (55) 55.0
 
Sept. 18, 2021, 1 a.m. N/A N/A 24.0 ppb (23) N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.58 ppb (7) 24.0 μg/m3 (23) 13.9 μg/m3 (55) 55.0
 
Sept. 18, 2021, midnight N/A N/A 23.1 ppb (22) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.53 ppb (6) 25.0 μg/m3 (24) 12.2 μg/m3 (52) 52.0
 
Sept. 17, 2021, 11 p.m. N/A N/A 12.2 ppb (12) N/A N/A 1.0 ppb (2) 57.0 ppb (58) 0.35 ppb (4) 18.0 μg/m3 (17) 9.1 μg/m3 (38) 58.0
 
Sept. 17, 2021, 10 p.m. N/A N/A 6.5 ppb (7) N/A N/A 1.0 ppb (2) 66.0 ppb (87) 0.25 ppb (3) 18.0 μg/m3 (17) 8.7 μg/m3 (37) 87.0
 
Sept. 17, 2021, 9 p.m. N/A N/A 5.0 ppb (5) N/A N/A 1.0 ppb (2) 65.0 ppb (84) 0.21 ppb (3) 17.0 μg/m3 (16) 8.3 μg/m3 (35) 84.0
 
Sept. 17, 2021, 8 p.m. N/A N/A 5.6 ppb (6) N/A N/A 1.0 ppb (2) 63.0 ppb (78) 0.2 ppb (3) 24.0 μg/m3 (23) 8.4 μg/m3 (36) 78.0
 
Sept. 17, 2021, 7 p.m. N/A N/A 5.4 ppb (6) N/A N/A 1.0 ppb (2) 63.0 ppb (78) 0.19 ppb (3) 18.0 μg/m3 (17) 7.7 μg/m3 (33) 78.0
 
Sept. 17, 2021, 6 p.m. N/A N/A 4.8 ppb (5) N/A N/A 0.0 ppb (0) 57.0 ppb (58) 0.19 ppb (3) 17.0 μg/m3 (16) 7.7 μg/m3 (33) 58.0
 
Sept. 17, 2021, 5 p.m. N/A N/A 5.0 ppb (5) N/A N/A 1.0 ppb (2) 53.0 ppb (50) 0.2 ppb (3) 18.0 μg/m3 (17) 9.1 μg/m3 (38) 50.0
 
Sept. 17, 2021, 4 p.m. N/A N/A 6.2 ppb (6) N/A N/A 1.0 ppb (2) 50.0 ppb (47) 0.23 ppb (3) 22.0 μg/m3 (21) 10.8 μg/m3 (46) 47.0
 
Sept. 17, 2021, 3 p.m. N/A N/A 7.7 ppb (8) N/A N/A 1.0 ppb (2) 42.0 ppb (39) 0.22 ppb (3) 23.0 μg/m3 (22) 11.9 μg/m3 (50) 50.0
 
Sept. 17, 2021, 2 p.m. N/A N/A 11.9 ppb (12) N/A N/A 2.0 ppb (3) 33.0 ppb (31) 0.24 ppb (3) 22.0 μg/m3 (21) 11.6 μg/m3 (49) 49.0
 
Sept. 17, 2021, 1 p.m. N/A N/A 17.3 ppb (17) N/A N/A 1.0 ppb (2) 26.0 ppb (25) 0.27 ppb (4) 22.0 μg/m3 (21) 10.2 μg/m3 (43) 43.0
 
Sept. 17, 2021, noon N/A N/A 24.1 ppb (23) N/A N/A 0.0 ppb (0) 17.0 ppb (16) 0.35 ppb (4) 19.0 μg/m3 (18) 8.9 μg/m3 (38) 38.0
 
Sept. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (13) 0.35 ppb (4) 16.0 μg/m3 (15) 7.7 μg/m3 (33) 33.0
 
Sept. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) 0.28 ppb (4) 13.0 μg/m3 (13) 6.8 μg/m3 (29) 29.0
 
Sept. 17, 2021, 9 a.m. N/A N/A 9.3 ppb (9) N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.2 ppb (3) 10.0 μg/m3 (10) 5.7 μg/m3 (24) 24.0
 
Sept. 17, 2021, 8 a.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 33.0 ppb (31) N/A 10.0 μg/m3 (10) 5.0 μg/m3 (21) 31.0
 
Sept. 17, 2021, 7 a.m. N/A N/A 4.4 ppb (5) N/A N/A 0.0 ppb (0) N/A 0.18 ppb (3) 9.0 μg/m3 (9) 4.9 μg/m3 (21) 21.0
 
Sept. 17, 2021, 6 a.m. N/A N/A 3.9 ppb (4) N/A N/A N/A 34.0 ppb (32) 0.18 ppb (3) 9.0 μg/m3 (9) 4.6 μg/m3 (20) 32.0
 
Sept. 17, 2021, 5 a.m. N/A N/A 3.2 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) 10.0 μg/m3 (10) 4.7 μg/m3 (20) 34.0
 
Sept. 17, 2021, 4 a.m. N/A N/A 3.2 ppb (4) N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.19 ppb (3) 9.0 μg/m3 (9) 4.9 μg/m3 (21) 37.0
 
Sept. 17, 2021, 3 a.m. N/A N/A 7.8 ppb (8) N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.25 ppb (3) 13.0 μg/m3 (13) 7.0 μg/m3 (30) 34.0
 
Sept. 17, 2021, 2 a.m. N/A N/A 25.6 ppb (25) N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.49 ppb (6) 17.0 μg/m3 (16) 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2021, 1 a.m. N/A N/A 20.2 ppb (20) N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.43 ppb (5) 19.0 μg/m3 (18) 9.0 μg/m3 (38) 38.0
 
Sept. 15, 2021, 3 p.m. N/A N/A 5.6 ppb (6) N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.19 ppb (3) 12.0 μg/m3 (12) 5.6 μg/m3 (24) 29.0
 
Sept. 15, 2021, 2 p.m. N/A N/A 6.5 ppb (7) N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) N/A N/A 25.0
 
Sept. 15, 2021, 1 p.m. N/A N/A 23.6 ppb (23) N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A 19.0 μg/m3 (18) 9.2 μg/m3 (39) 39.0
 
Sept. 15, 2021, noon N/A N/A 34.4 ppb (33) N/A N/A 0.0 ppb (0) 6.0 ppb (6) 0.74 ppb (8) 15.0 μg/m3 (14) 7.2 μg/m3 (31) 33.0
 
Sept. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 7.0 ppb (7) 0.64 ppb (7) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (13) 0.51 ppb (6) 11.0 μg/m3 (11) 5.3 μg/m3 (23) 23.0
 
Sept. 15, 2021, 9 a.m. N/A N/A 7.9 ppb (8) N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.51 ppb (6) 11.0 μg/m3 (11) 5.4 μg/m3 (23) 23.0
 
Sept. 15, 2021, 8 a.m. N/A N/A 9.6 ppb (10) N/A N/A 0.0 ppb (0) 14.0 ppb (13) N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2021, 7 a.m. N/A N/A 6.8 ppb (7) N/A N/A 0.0 ppb (0) N/A 0.45 ppb (6) 11.0 μg/m3 (11) 5.2 μg/m3 (22) 22.0
 
Sept. 15, 2021, 6 a.m. N/A N/A 5.2 ppb (5) N/A N/A N/A 20.0 ppb (19) 0.46 ppb (6) 9.0 μg/m3 (9) 4.6 μg/m3 (20) 20.0
 
Sept. 15, 2021, 5 a.m. N/A N/A 5.1 ppb (5) N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.46 ppb (6) 8.0 μg/m3 (8) 4.6 μg/m3 (20) 21.0
 
Sept. 15, 2021, 4 a.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.51 ppb (6) 12.0 μg/m3 (12) 5.7 μg/m3 (24) 24.0
 
Sept. 15, 2021, 3 a.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.48 ppb (6) 10.0 μg/m3 (10) 4.6 μg/m3 (20) 22.0
 
Sept. 15, 2021, 2 a.m. N/A N/A 8.1 ppb (8) N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.49 ppb (6) 10.0 μg/m3 (10) 4.5 μg/m3 (19) 22.0
 
Sept. 15, 2021, 1 a.m. N/A N/A 8.2 ppb (8) N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.5 ppb (6) 10.0 μg/m3 (10) 4.5 μg/m3 (19) 25.0
 
Sept. 15, 2021, midnight N/A N/A 5.8 ppb (6) N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.46 ppb (6) 9.0 μg/m3 (9) 3.8 μg/m3 (16) 29.0
 
Sept. 14, 2021, 11 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.44 ppb (5) 10.0 μg/m3 (10) 3.8 μg/m3 (16) 33.0
 
Sept. 14, 2021, 10 p.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.44 ppb (5) 13.0 μg/m3 (13) 5.3 μg/m3 (23) 34.0
 
Sept. 14, 2021, 9 p.m. N/A N/A 6.5 ppb (7) N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.46 ppb (6) 25.0 μg/m3 (24) 13.0 μg/m3 (53) 53.0
 
Sept. 14, 2021, 8 p.m. N/A N/A 5.3 ppb (5) N/A N/A 0.0 ppb (0) 51.0 ppb (48) 0.44 ppb (5) 31.0 μg/m3 (29) 13.8 μg/m3 (55) 55.0
 
Sept. 14, 2021, 7 p.m. N/A N/A 5.6 ppb (6) N/A N/A 0.0 ppb (0) 58.0 ppb (61) 0.43 ppb (5) 27.0 μg/m3 (25) 13.8 μg/m3 (55) 61.0
 
Sept. 14, 2021, 6 p.m. N/A N/A 6.4 ppb (7) N/A N/A 1.0 ppb (2) 53.0 ppb (50) 0.44 ppb (5) 31.0 μg/m3 (29) 14.2 μg/m3 (56) 56.0
 
Sept. 14, 2021, 5 p.m. N/A N/A 60.7 ppb (59) N/A N/A 1.0 ppb (2) 48.0 ppb (45) 0.43 ppb (5) 30.0 μg/m3 (28) 13.4 μg/m3 (54) 59.0
 
Sept. 14, 2021, 4 p.m. N/A N/A 111.7 ppb (104) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.42 ppb (5) 30.0 μg/m3 (28) 13.2 μg/m3 (54) 104.0
 
Sept. 14, 2021, 3 p.m. N/A N/A 47.8 ppb (46) N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.44 ppb (5) 28.0 μg/m3 (26) 13.3 μg/m3 (54) 54.0
 
Sept. 14, 2021, 2 p.m. N/A N/A 9.4 ppb (9) N/A N/A 1.0 ppb (2) N/A 0.43 ppb (5) 26.0 μg/m3 (25) 13.4 μg/m3 (54) 54.0
 
Sept. 14, 2021, 1 p.m. N/A N/A 19.2 ppb (19) N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.45 ppb (6) 26.0 μg/m3 (25) 12.9 μg/m3 (53) 53.0
 
Sept. 14, 2021, noon N/A N/A 14.4 ppb (14) N/A N/A 0.0 ppb (0) 17.0 ppb (16) 0.48 ppb (6) 26.0 μg/m3 (25) 13.6 μg/m3 (55) 55.0
 
Sept. 14, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (13) 0.52 ppb (6) 26.0 μg/m3 (25) 14.5 μg/m3 (57) 57.0
 
Sept. 14, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.52 ppb (6) 28.0 μg/m3 (26) 15.7 μg/m3 (59) 59.0
 
Sept. 14, 2021, 9 a.m. N/A N/A 8.8 ppb (9) N/A N/A 0.0 ppb (0) 19.0 ppb (18) 0.48 ppb (6) 26.0 μg/m3 (25) 15.5 μg/m3 (59) 59.0
 
Sept. 14, 2021, 8 a.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 10.0 ppb (10) N/A 28.0 μg/m3 (26) 15.9 μg/m3 (59) 59.0
 
Sept. 14, 2021, 7 a.m. N/A N/A 7.0 ppb (7) N/A N/A 0.0 ppb (0) N/A 0.48 ppb (6) 28.0 μg/m3 (26) 17.1 μg/m3 (62) 62.0
 
Sept. 14, 2021, 6 a.m. N/A N/A 5.4 ppb (6) N/A N/A N/A 10.0 ppb (10) 0.46 ppb (6) 28.0 μg/m3 (26) 16.9 μg/m3 (62) 62.0
 
Sept. 14, 2021, 5 a.m. N/A N/A 4.9 ppb (5) N/A N/A 0.0 ppb (0) 11.0 ppb (11) 0.45 ppb (6) 27.0 μg/m3 (25) 16.5 μg/m3 (61) 61.0
 
Sept. 14, 2021, 4 a.m. N/A N/A 4.4 ppb (5) N/A N/A 0.0 ppb (0) 13.0 ppb (13) 0.47 ppb (6) 25.0 μg/m3 (24) 14.2 μg/m3 (56) 56.0
 
Sept. 14, 2021, 3 a.m. N/A N/A 3.6 ppb (4) N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.44 ppb (5) 19.0 μg/m3 (18) 10.8 μg/m3 (46) 46.0
 
Sept. 14, 2021, 2 a.m. N/A N/A 5.6 ppb (6) N/A N/A 0.0 ppb (0) 15.0 ppb (14) 0.45 ppb (6) 17.0 μg/m3 (16) 9.9 μg/m3 (42) 42.0
 
Sept. 14, 2021, 1 a.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 15.0 ppb (14) 0.45 ppb (6) 15.0 μg/m3 (14) 8.5 μg/m3 (36) 36.0
 
Sept. 14, 2021, midnight N/A N/A 5.1 ppb (5) N/A N/A 0.0 ppb (0) 16.0 ppb (15) 0.46 ppb (6) 16.0 μg/m3 (15) 7.7 μg/m3 (33) 33.0
 
Sept. 13, 2021, 11 p.m. N/A N/A 7.8 ppb (8) N/A N/A 0.0 ppb (0) 14.0 ppb (13) 0.51 ppb (6) 14.0 μg/m3 (13) 7.4 μg/m3 (31) 31.0