ID: 497

AQSQID: 260810020

Site Name: Grand Rapids

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

Updated: March 6, 2021, 5:32 p.m.

Location: Grand Rapids (Belknap Lookout), MI

Reporting: True, Located: True

Current AQI: 37.0

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
March 6, 2021, 4 p.m. N/A N/A 3.6 ppb (4) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
March 6, 2021, 3 p.m. N/A N/A 4.5 ppb (5) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.22 ppb (3) N/A 3.7 μg/m3 (16) 36.0
 
March 6, 2021, 2 p.m. N/A N/A 5.6 ppb (6) N/A N/A 1.0 ppb (2) 36.0 ppb (34) 0.25 ppb (3) N/A 4.8 μg/m3 (20) 34.0
 
March 6, 2021, 1 p.m. N/A N/A 17.3 ppb (17) N/A N/A 1.0 ppb (2) 26.0 ppb (25) 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 6, 2021, noon N/A N/A 18.0 ppb (17) N/A N/A 1.0 ppb (2) 22.0 ppb (21) 0.33 ppb (4) N/A 5.6 μg/m3 (24) 24.0
 
March 6, 2021, 11 a.m. N/A N/A 20.5 ppb (20) N/A N/A 1.0 ppb (2) 19.0 ppb (18) 0.3 ppb (4) N/A 5.8 μg/m3 (25) 25.0
 
March 6, 2021, 10 a.m. N/A N/A 15.6 ppb (15) N/A N/A 1.0 ppb (2) 23.0 ppb (22) 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 6, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) 0.25 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
March 6, 2021, 8 a.m. N/A N/A 8.3 ppb (8) N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 5.1 μg/m3 (22) 29.0
 
March 6, 2021, 7 a.m. N/A N/A 7.0 ppb (7) N/A N/A 1.0 ppb (2) N/A 0.22 ppb (3) N/A 5.3 μg/m3 (23) 23.0
 
March 6, 2021, 6 a.m. N/A N/A 4.9 ppb (5) N/A N/A N/A 35.0 ppb (33) 0.22 ppb (3) N/A 5.7 μg/m3 (24) 33.0
 
March 6, 2021, 5 a.m. N/A N/A 5.7 ppb (6) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.24 ppb (3) N/A 6.1 μg/m3 (26) 32.0
 
March 6, 2021, 4 a.m. N/A N/A 6.6 ppb (7) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.27 ppb (4) N/A 5.6 μg/m3 (24) 31.0
 
March 6, 2021, 3 a.m. N/A N/A 6.2 ppb (6) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.25 ppb (3) N/A 4.8 μg/m3 (20) 32.0
 
March 6, 2021, 2 a.m. N/A N/A 6.6 ppb (7) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.25 ppb (3) N/A 4.3 μg/m3 (18) 32.0
 
March 6, 2021, 1 a.m. N/A N/A 5.5 ppb (6) N/A N/A 1.0 ppb (2) 36.0 ppb (34) 0.24 ppb (3) N/A 3.9 μg/m3 (17) 34.0
 
March 6, 2021, midnight N/A N/A 5.7 ppb (6) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.25 ppb (3) N/A 3.7 μg/m3 (16) 35.0
 
March 5, 2021, 11 p.m. N/A N/A 4.7 ppb (5) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.24 ppb (3) N/A 3.5 μg/m3 (15) 36.0
 
March 5, 2021, 10 p.m. N/A N/A 5.3 ppb (5) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.24 ppb (3) N/A 3.6 μg/m3 (16) 37.0
 
March 5, 2021, 9 p.m. N/A N/A 5.5 ppb (6) N/A N/A 1.0 ppb (2) 41.0 ppb (38) 0.23 ppb (3) N/A 3.6 μg/m3 (16) 38.0
 
March 5, 2021, 8 p.m. N/A N/A 6.0 ppb (6) N/A N/A 1.0 ppb (2) 41.0 ppb (38) 0.24 ppb (3) N/A 5.3 μg/m3 (23) 38.0
 
March 5, 2021, 7 p.m. N/A N/A 6.3 ppb (6) N/A N/A 1.0 ppb (2) 41.0 ppb (38) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 38.0
 
March 5, 2021, 6 p.m. N/A N/A 6.6 ppb (7) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.25 ppb (3) N/A 6.8 μg/m3 (29) 38.0
 
March 5, 2021, 5 p.m. N/A N/A 7.1 ppb (7) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.24 ppb (3) N/A 7.7 μg/m3 (33) 36.0
 
March 5, 2021, 4 p.m. N/A N/A 10.2 ppb (10) N/A N/A 1.0 ppb (2) 35.0 ppb (33) 0.26 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
March 5, 2021, 3 p.m. N/A N/A 7.8 ppb (8) N/A N/A 1.0 ppb (2) 35.0 ppb (33) 0.26 ppb (4) N/A 6.6 μg/m3 (28) 33.0
 
March 5, 2021, 2 p.m. N/A N/A 18.3 ppb (18) N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.32 ppb (4) N/A 6.9 μg/m3 (29) 29.0
 
March 5, 2021, 1 p.m. N/A N/A 32.8 ppb (31) N/A N/A 1.0 ppb (2) 17.0 ppb (16) 0.42 ppb (5) N/A 7.7 μg/m3 (33) 33.0
 
March 5, 2021, noon N/A N/A 40.7 ppb (39) N/A N/A 1.0 ppb (2) 8.0 ppb (8) 0.45 ppb (6) N/A 7.4 μg/m3 (31) 39.0
 
March 5, 2021, 11 a.m. N/A N/A 23.0 ppb (22) N/A N/A 1.0 ppb (2) 16.0 ppb (15) 0.33 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
March 5, 2021, 10 a.m. N/A N/A 18.9 ppb (18) N/A N/A 1.0 ppb (2) 20.0 ppb (19) 0.32 ppb (4) N/A 6.1 μg/m3 (26) 26.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) 0.29 ppb (4) N/A 5.7 μg/m3 (24) 24.0
 
March 5, 2021, 8 a.m. N/A N/A 13.1 ppb (13) N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
March 5, 2021, 7 a.m. N/A N/A 13.5 ppb (13) N/A N/A 1.0 ppb (2) N/A 0.25 ppb (3) N/A 5.4 μg/m3 (23) 23.0
 
March 5, 2021, 6 a.m. N/A N/A 10.6 ppb (10) N/A N/A N/A 29.0 ppb (27) 0.24 ppb (3) N/A 5.5 μg/m3 (23) 27.0
 
March 5, 2021, 5 a.m. N/A N/A 7.6 ppb (8) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.24 ppb (3) N/A 5.8 μg/m3 (25) 29.0
 
March 5, 2021, 4 a.m. N/A N/A 8.0 ppb (8) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
March 5, 2021, 3 a.m. N/A N/A 6.9 ppb (7) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.23 ppb (3) N/A 5.3 μg/m3 (23) 31.0
 
March 5, 2021, 2 a.m. N/A N/A 9.9 ppb (10) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.27 ppb (4) N/A 5.3 μg/m3 (23) 29.0
 
March 5, 2021, 1 a.m. N/A N/A 17.4 ppb (17) N/A N/A 1.0 ppb (2) 24.0 ppb (23) 0.36 ppb (5) N/A 5.9 μg/m3 (25) 25.0
 
March 5, 2021, midnight N/A N/A 11.2 ppb (11) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.29 ppb (4) N/A 5.3 μg/m3 (23) 29.0
 
March 4, 2021, 11 p.m. N/A N/A 8.4 ppb (8) N/A N/A 1.0 ppb (2) 35.0 ppb (33) 0.3 ppb (4) N/A 4.8 μg/m3 (20) 33.0
 
March 4, 2021, 10 p.m. N/A N/A 4.5 ppb (5) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.23 ppb (3) N/A 4.5 μg/m3 (19) 38.0
 
March 4, 2021, 9 p.m. N/A N/A 6.8 ppb (7) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.23 ppb (3) N/A 4.9 μg/m3 (21) 37.0
 
March 4, 2021, 8 p.m. N/A N/A 5.4 ppb (6) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.23 ppb (3) N/A 5.3 μg/m3 (23) 37.0
 
March 4, 2021, 7 p.m. N/A N/A 6.3 ppb (6) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.23 ppb (3) N/A 6.6 μg/m3 (28) 36.0
 
March 4, 2021, 6 p.m. N/A N/A 7.5 ppb (8) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
March 4, 2021, 5 p.m. N/A N/A 5.6 ppb (6) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.22 ppb (3) N/A 4.7 μg/m3 (20) 35.0
 
March 4, 2021, 4 p.m. N/A N/A 5.9 ppb (6) N/A N/A 1.0 ppb (2) N/A 0.28 ppb (4) N/A 5.3 μg/m3 (23) 23.0
 
March 4, 2021, 3 p.m. N/A N/A 7.9 ppb (8) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
March 4, 2021, 2 p.m. N/A N/A 6.7 ppb (7) N/A N/A 1.0 ppb (2) 35.0 ppb (33) 0.22 ppb (3) N/A 4.1 μg/m3 (18) 33.0
 
March 4, 2021, 1 p.m. N/A N/A 8.6 ppb (9) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.23 ppb (3) N/A 4.4 μg/m3 (19) 31.0
 
March 4, 2021, noon N/A N/A 8.6 ppb (9) N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.28 ppb (4) N/A 4.6 μg/m3 (20) 30.0
 
March 4, 2021, 11 a.m. N/A N/A 6.5 ppb (7) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.22 ppb (3) N/A 4.6 μg/m3 (20) 32.0
 
March 4, 2021, 10 a.m. N/A N/A 5.1 ppb (5) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.19 ppb (3) N/A 4.7 μg/m3 (20) 31.0
 
March 4, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.2 ppb (3) N/A 5.2 μg/m3 (22) 30.0
 
March 4, 2021, 8 a.m. N/A N/A 4.4 ppb (5) N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 5.5 μg/m3 (23) 30.0
 
March 4, 2021, 7 a.m. N/A N/A 4.1 ppb (4) N/A N/A 1.0 ppb (2) N/A 0.21 ppb (3) N/A 5.8 μg/m3 (25) 25.0
 
March 4, 2021, 6 a.m. N/A N/A 5.1 ppb (5) N/A N/A N/A 31.0 ppb (29) 0.21 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
March 4, 2021, 5 a.m. N/A N/A 8.3 ppb (8) N/A N/A 1.0 ppb (2) 27.0 ppb (25) 0.24 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
March 4, 2021, 4 a.m. N/A N/A 11.6 ppb (11) N/A N/A 1.0 ppb (2) 23.0 ppb (22) 0.29 ppb (4) N/A 8.8 μg/m3 (37) 37.0
 
March 4, 2021, 3 a.m. N/A N/A 9.0 ppb (9) N/A N/A 1.0 ppb (2) 26.0 ppb (25) 0.26 ppb (4) N/A 7.9 μg/m3 (33) 33.0
 
March 4, 2021, 2 a.m. N/A N/A 7.2 ppb (7) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.23 ppb (3) N/A 8.7 μg/m3 (37) 37.0
 
March 4, 2021, 1 a.m. N/A N/A 7.8 ppb (8) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.24 ppb (3) N/A 11.9 μg/m3 (50) 50.0
 
March 4, 2021, midnight N/A N/A 11.3 ppb (11) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.27 ppb (4) N/A 14.5 μg/m3 (57) 57.0
 
March 3, 2021, 11 p.m. N/A N/A 8.1 ppb (8) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.25 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 10 p.m. N/A N/A 7.3 ppb (7) N/A N/A 1.0 ppb (2) 41.0 ppb (38) 0.24 ppb (3) N/A 12.1 μg/m3 (51) 51.0
 
March 3, 2021, 9 p.m. N/A N/A 9.6 ppb (10) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.25 ppb (3) N/A 14.4 μg/m3 (56) 56.0
 
March 3, 2021, 8 p.m. N/A N/A 8.7 ppb (9) N/A N/A 1.0 ppb (2) 42.0 ppb (39) 0.23 ppb (3) N/A 15.3 μg/m3 (58) 58.0
 
March 3, 2021, 7 p.m. N/A N/A 8.3 ppb (8) N/A N/A 1.0 ppb (2) 42.0 ppb (39) 0.22 ppb (3) N/A 14.7 μg/m3 (57) 57.0
 
March 3, 2021, 6 p.m. N/A N/A 8.4 ppb (8) N/A N/A 1.0 ppb (2) 42.0 ppb (39) 0.23 ppb (3) N/A 15.1 μg/m3 (58) 58.0
 
March 3, 2021, 5 p.m. N/A N/A 8.4 ppb (8) N/A N/A 2.0 ppb (3) 40.0 ppb (38) 0.24 ppb (3) N/A 15.0 μg/m3 (58) 58.0
 
March 3, 2021, 4 p.m. N/A N/A 10.9 ppb (11) N/A N/A 2.0 ppb (3) 34.0 ppb (32) 0.25 ppb (3) N/A 15.2 μg/m3 (58) 58.0
 
March 3, 2021, 3 p.m. N/A N/A 11.2 ppb (11) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.26 ppb (4) N/A 14.4 μg/m3 (56) 56.0
 
March 3, 2021, 2 p.m. N/A N/A 15.1 ppb (15) N/A N/A 1.0 ppb (2) 25.0 ppb (24) 0.29 ppb (4) N/A 15.8 μg/m3 (59) 59.0
 
March 3, 2021, 1 p.m. N/A N/A 25.5 ppb (25) N/A N/A 1.0 ppb (2) 14.0 ppb (13) 0.39 ppb (5) N/A 17.4 μg/m3 (63) 63.0
 
March 3, 2021, noon N/A N/A 26.0 ppb (25) N/A N/A 1.0 ppb (2) 10.0 ppb (10) 0.39 ppb (5) N/A 17.3 μg/m3 (62) 62.0
 
March 3, 2021, 11 a.m. N/A N/A 16.3 ppb (16) N/A N/A 1.0 ppb (2) 18.0 ppb (17) 0.3 ppb (4) N/A 15.4 μg/m3 (58) 58.0
 
March 3, 2021, 10 a.m. N/A N/A 11.4 ppb (11) N/A N/A 1.0 ppb (2) 24.0 ppb (23) 0.26 ppb (4) N/A 14.1 μg/m3 (56) 56.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) 0.24 ppb (3) N/A 12.6 μg/m3 (53) 53.0
 
March 3, 2021, 8 a.m. N/A N/A 8.1 ppb (8) N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 12.2 μg/m3 (52) 52.0
 
March 3, 2021, 7 a.m. N/A N/A 6.9 ppb (7) N/A N/A 1.0 ppb (2) N/A 0.24 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 6 a.m. N/A N/A 6.6 ppb (7) N/A N/A N/A 32.0 ppb (30) 0.23 ppb (3) N/A 12.6 μg/m3 (53) 53.0
 
March 3, 2021, 5 a.m. N/A N/A 7.4 ppb (7) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.22 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
March 3, 2021, 4 a.m. N/A N/A 7.8 ppb (8) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.22 ppb (3) N/A 12.8 μg/m3 (53) 53.0
 
March 3, 2021, 3 a.m. N/A N/A 8.4 ppb (8) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.23 ppb (3) N/A N/A 29.0
 
March 3, 2021, 2 a.m. N/A N/A 10.6 ppb (10) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.23 ppb (3) N/A 11.7 μg/m3 (49) 49.0
 
March 3, 2021, 1 a.m. N/A N/A 14.0 ppb (14) N/A N/A 1.0 ppb (2) 29.0 ppb (27) 0.24 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 3, 2021, midnight N/A N/A 10.7 ppb (11) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.24 ppb (3) N/A 10.2 μg/m3 (43) 43.0
 
March 2, 2021, 11 p.m. N/A N/A 8.5 ppb (9) N/A N/A 1.0 ppb (2) 36.0 ppb (34) 0.22 ppb (3) N/A 9.6 μg/m3 (40) 40.0
 
March 2, 2021, 10 p.m. N/A N/A 7.6 ppb (8) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.22 ppb (3) N/A 8.1 μg/m3 (34) 37.0
 
March 2, 2021, 9 p.m. N/A N/A 7.0 ppb (7) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.2 ppb (3) N/A 6.9 μg/m3 (29) 38.0
 
March 2, 2021, 8 p.m. N/A N/A 6.7 ppb (7) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.2 ppb (3) N/A 6.9 μg/m3 (29) 38.0
 
March 2, 2021, 7 p.m. N/A N/A 6.7 ppb (7) N/A N/A 1.0 ppb (2) 41.0 ppb (38) 0.2 ppb (3) N/A N/A 38.0
 
March 2, 2021, 6 p.m. N/A N/A 7.4 ppb (7) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.19 ppb (3) N/A 7.0 μg/m3 (30) 38.0
 
March 2, 2021, 5 p.m. N/A N/A 7.3 ppb (7) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.18 ppb (3) N/A 7.2 μg/m3 (31) 37.0
 
March 2, 2021, 4 p.m. N/A N/A 7.8 ppb (8) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.19 ppb (3) N/A 8.0 μg/m3 (34) 35.0
 
March 2, 2021, 3 p.m. N/A N/A 8.4 ppb (8) N/A N/A 1.0 ppb (2) N/A 0.2 ppb (3) N/A 8.2 μg/m3 (35) 35.0
 
March 2, 2021, 2 p.m. N/A N/A 13.3 ppb (13) N/A N/A N/A N/A 0.24 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
March 2, 2021, 1 p.m. N/A N/A 29.9 ppb (29) N/A N/A 1.0 ppb (2) 19.0 ppb (18) 0.55 ppb (7) N/A 10.1 μg/m3 (43) 43.0
 
March 2, 2021, noon N/A N/A 39.2 ppb (37) N/A N/A 1.0 ppb (2) 9.0 ppb (9) 0.41 ppb (5) N/A 8.1 μg/m3 (34) 37.0
 
March 2, 2021, 11 a.m. N/A N/A 39.9 ppb (38) N/A N/A 1.0 ppb (2) 6.0 ppb (6) 0.33 ppb (4) N/A 7.9 μg/m3 (33) 38.0
 
March 2, 2021, 10 a.m. N/A N/A 32.2 ppb (31) N/A N/A 1.0 ppb (2) 10.0 ppb (10) 0.29 ppb (4) N/A 7.9 μg/m3 (33) 33.0
 
March 2, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 10.0 ppb (10) 0.28 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
March 2, 2021, 8 a.m. N/A N/A 42.2 ppb (40) N/A N/A 1.0 ppb (2) 8.0 ppb (8) N/A N/A 8.0 μg/m3 (34) 40.0
 
March 2, 2021, 7 a.m. N/A N/A 52.8 ppb (50) N/A N/A 1.0 ppb (2) N/A 0.42 ppb (5) N/A 8.4 μg/m3 (36) 50.0
 
March 2, 2021, 6 a.m. N/A N/A 64.0 ppb (62) N/A N/A N/A 1.0 ppb (1) 0.47 ppb (6) N/A 8.2 μg/m3 (35) 62.0
 
March 2, 2021, 5 a.m. N/A N/A 42.0 ppb (40) N/A N/A 1.0 ppb (2) 4.0 ppb (4) 0.33 ppb (4) N/A 7.5 μg/m3 (32) 40.0
 
March 2, 2021, 4 a.m. N/A N/A 20.1 ppb (19) N/A N/A 1.0 ppb (2) 19.0 ppb (18) 0.26 ppb (4) N/A 5.8 μg/m3 (25) 25.0
 
March 2, 2021, 3 a.m. N/A N/A 12.4 ppb (12) N/A N/A 1.0 ppb (2) 29.0 ppb (27) 0.22 ppb (3) N/A 5.5 μg/m3 (23) 27.0
 
March 2, 2021, 2 a.m. N/A N/A 10.5 ppb (10) N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.21 ppb (3) N/A 4.9 μg/m3 (21) 30.0
 
March 2, 2021, 1 a.m. N/A N/A 8.9 ppb (9) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.18 ppb (3) N/A 4.2 μg/m3 (18) 32.0
 
March 2, 2021, midnight N/A N/A 5.9 ppb (6) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.18 ppb (3) N/A 4.1 μg/m3 (18) 35.0
 
March 1, 2021, 11 p.m. N/A N/A 5.0 ppb (5) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 36.0
 
March 1, 2021, 10 p.m. N/A N/A 4.7 ppb (5) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 38.0
 
March 1, 2021, 9 p.m. N/A N/A 5.3 ppb (5) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.16 ppb (3) N/A 4.2 μg/m3 (18) 38.0
 
March 1, 2021, 8 p.m. N/A N/A 5.2 ppb (5) N/A N/A 1.0 ppb (2) 40.0 ppb (38) 0.16 ppb (3) N/A 4.4 μg/m3 (19) 38.0
 
March 1, 2021, 7 p.m. N/A N/A 6.4 ppb (7) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.17 ppb (3) N/A 4.4 μg/m3 (19) 36.0
 
March 1, 2021, 6 p.m. N/A N/A 4.6 ppb (5) N/A N/A 1.0 ppb (2) 39.0 ppb (37) 0.15 ppb (2) N/A 3.8 μg/m3 (16) 37.0
 
March 1, 2021, 5 p.m. N/A N/A 4.6 ppb (5) N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 4.3 μg/m3 (18) 37.0
 
March 1, 2021, 4 p.m. N/A N/A 4.6 ppb (5) N/A N/A 1.0 ppb (2) 38.0 ppb (36) 0.28 ppb (4) N/A 3.8 μg/m3 (16) 36.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) 0.28 ppb (4) N/A N/A 34.0
 
March 1, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.28 ppb (4) N/A 5.4 μg/m3 (23) 32.0
 
March 1, 2021, 1 p.m. N/A N/A 10.0 ppb (10) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.31 ppb (4) N/A 5.2 μg/m3 (22) 28.0
 
March 1, 2021, noon N/A N/A 8.6 ppb (9) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.31 ppb (4) N/A 5.2 μg/m3 (22) 29.0
 
March 1, 2021, 11 a.m. N/A N/A 6.9 ppb (7) N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.3 ppb (4) N/A 5.2 μg/m3 (22) 30.0
 
March 1, 2021, 10 a.m. N/A N/A 4.6 ppb (5) N/A N/A 1.0 ppb (2) 35.0 ppb (33) 0.29 ppb (4) N/A 4.6 μg/m3 (20) 33.0
 
March 1, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.29 ppb (4) N/A 4.1 μg/m3 (18) 32.0
 
March 1, 2021, 8 a.m. N/A N/A 2.6 ppb (3) N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 3.3 μg/m3 (14) 32.0
 
March 1, 2021, 7 a.m. N/A N/A 2.4 ppb (3) N/A N/A 1.0 ppb (2) N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 1, 2021, 6 a.m. N/A N/A 2.7 ppb (3) N/A N/A N/A 33.0 ppb (31) 0.28 ppb (4) N/A 4.4 μg/m3 (19) 31.0
 
March 1, 2021, 5 a.m. N/A N/A 2.9 ppb (3) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.28 ppb (4) N/A 5.7 μg/m3 (24) 31.0
 
March 1, 2021, 4 a.m. N/A N/A 3.6 ppb (4) N/A N/A 1.0 ppb (2) 31.0 ppb (29) 0.29 ppb (4) N/A 7.2 μg/m3 (31) 31.0
 
March 1, 2021, 3 a.m. N/A N/A 3.9 ppb (4) N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.31 ppb (4) N/A 8.6 μg/m3 (36) 36.0
 
March 1, 2021, 2 a.m. N/A N/A 4.5 ppb (5) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.33 ppb (4) N/A 8.6 μg/m3 (36) 36.0
 
March 1, 2021, 1 a.m. N/A N/A 5.3 ppb (5) N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.31 ppb (4) N/A 13.9 μg/m3 (55) 55.0
 
March 1, 2021, midnight N/A N/A 6.4 ppb (7) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.32 ppb (4) N/A 14.7 μg/m3 (57) 57.0
 
Feb. 28, 2021, 11 p.m. N/A N/A 5.9 ppb (6) N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.32 ppb (4) N/A 13.5 μg/m3 (54) 54.0
 
Feb. 28, 2021, 10 p.m. N/A N/A 6.1 ppb (6) N/A N/A 1.0 ppb (2) 25.0 ppb (24) 0.34 ppb (4) N/A 9.3 μg/m3 (39) 39.0
 
Feb. 28, 2021, 9 p.m. N/A N/A 6.2 ppb (6) N/A N/A 1.0 ppb (2) 23.0 ppb (22) 0.34 ppb (4) N/A 9.4 μg/m3 (40) 40.0
 
Feb. 28, 2021, 8 p.m. N/A N/A 10.5 ppb (10) N/A N/A 1.0 ppb (2) 19.0 ppb (18) 0.38 ppb (5) N/A 12.6 μg/m3 (53) 53.0
 
Feb. 28, 2021, 7 p.m. N/A N/A 11.1 ppb (11) N/A N/A 1.0 ppb (2) 20.0 ppb (19) 0.38 ppb (5) N/A 13.9 μg/m3 (55) 55.0
 
Feb. 28, 2021, 6 p.m. N/A N/A 16.4 ppb (16) N/A N/A 1.0 ppb (2) 17.0 ppb (16) 0.41 ppb (5) N/A 13.5 μg/m3 (54) 54.0
 
Feb. 28, 2021, 5 p.m. N/A N/A 11.4 ppb (11) N/A N/A 1.0 ppb (2) 21.0 ppb (20) 0.38 ppb (5) N/A 14.2 μg/m3 (56) 56.0
 
Feb. 28, 2021, 4 p.m. N/A N/A 10.2 ppb (10) N/A N/A 1.0 ppb (2) 26.0 ppb (25) 0.35 ppb (4) N/A 16.9 μg/m3 (62) 62.0
 
Feb. 28, 2021, 3 p.m. N/A N/A 8.4 ppb (8) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.33 ppb (4) N/A 16.7 μg/m3 (61) 61.0
 
Feb. 28, 2021, 2 p.m. N/A N/A 9.1 ppb (9) N/A N/A 1.0 ppb (2) 29.0 ppb (27) 0.33 ppb (4) N/A 18.9 μg/m3 (66) 66.0
 
Feb. 28, 2021, 1 p.m. N/A N/A 8.2 ppb (8) N/A N/A 1.0 ppb (2) 29.0 ppb (27) 0.32 ppb (4) N/A 19.3 μg/m3 (67) 67.0
 
Feb. 28, 2021, noon N/A N/A 7.3 ppb (7) N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.32 ppb (4) N/A 19.0 μg/m3 (66) 66.0
 
Feb. 28, 2021, 11 a.m. N/A N/A 7.8 ppb (8) N/A N/A 1.0 ppb (2) 29.0 ppb (27) 0.32 ppb (4) N/A 20.3 μg/m3 (69) 69.0
 
Feb. 28, 2021, 10 a.m. N/A N/A 18.4 ppb (18) N/A N/A 1.0 ppb (2) 14.0 ppb (13) 0.45 ppb (6) N/A 27.0 μg/m3 (83) 83.0
 
Feb. 28, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 10.0 ppb (10) 0.49 ppb (6) N/A 28.5 μg/m3 (86) 86.0
 
Feb. 28, 2021, 8 a.m. N/A N/A 34.0 ppb (33) N/A N/A 1.0 ppb (2) 1.0 ppb (1) N/A N/A 31.2 μg/m3 (92) 92.0
 
Feb. 28, 2021, 7 a.m. N/A N/A 57.3 ppb (55) N/A N/A 1.0 ppb (2) N/A 0.81 ppb (10) N/A 32.4 μg/m3 (94) 94.0
 
Feb. 28, 2021, 6 a.m. N/A N/A 62.7 ppb (61) N/A N/A N/A 1.0 ppb (1) 0.87 ppb (11) N/A 32.6 μg/m3 (95) 95.0
 
Feb. 28, 2021, 5 a.m. N/A N/A 58.8 ppb (57) N/A N/A 1.0 ppb (2) 1.0 ppb (1) 0.95 ppb (11) N/A 33.3 μg/m3 (96) 96.0
 
Feb. 28, 2021, 4 a.m. N/A N/A 77.3 ppb (76) N/A N/A 1.0 ppb (2) 1.0 ppb (1) 1.06 ppb (13) N/A 34.7 μg/m3 (99) 99.0
 
Feb. 28, 2021, 3 a.m. N/A N/A 80.9 ppb (80) N/A N/A 1.0 ppb (2) 1.0 ppb (1) 1.14 ppb (13) N/A 33.6 μg/m3 (97) 97.0
 
Feb. 28, 2021, 2 a.m. N/A N/A 80.5 ppb (80) N/A N/A 1.0 ppb (2) 1.0 ppb (1) 1.14 ppb (13) N/A 34.1 μg/m3 (98) 98.0
 
Feb. 28, 2021, 1 a.m. N/A N/A 64.5 ppb (63) N/A N/A 1.0 ppb (2) 1.0 ppb (1) 0.93 ppb (11) N/A 27.9 μg/m3 (85) 85.0
 
Feb. 28, 2021, midnight N/A N/A 40.5 ppb (39) N/A N/A 1.0 ppb (2) 4.0 ppb (4) 0.69 ppb (8) N/A 25.1 μg/m3 (79) 79.0
 
Feb. 27, 2021, 11 p.m. N/A N/A 22.5 ppb (22) N/A N/A 1.0 ppb (2) 22.0 ppb (21) 0.51 ppb (6) N/A 20.4 μg/m3 (69) 69.0
 
Feb. 27, 2021, 10 p.m. N/A N/A 13.1 ppb (13) N/A N/A 1.0 ppb (2) 34.0 ppb (32) 0.4 ppb (5) N/A 18.9 μg/m3 (66) 66.0
 
Feb. 27, 2021, 9 p.m. N/A N/A 12.0 ppb (12) N/A N/A 1.0 ppb (2) 36.0 ppb (34) 0.37 ppb (5) N/A 18.7 μg/m3 (65) 65.0
 
Feb. 27, 2021, 8 p.m. N/A N/A 11.5 ppb (11) N/A N/A 1.0 ppb (2) 37.0 ppb (35) 0.34 ppb (4) N/A 19.2 μg/m3 (66) 66.0
 
Feb. 27, 2021, 7 p.m. N/A N/A 12.2 ppb (12) N/A N/A 2.0 ppb (3) 34.0 ppb (32) 0.33 ppb (4) N/A 20.6 μg/m3 (69) 69.0
 
Feb. 27, 2021, 6 p.m. N/A N/A 12.8 ppb (13) N/A N/A 1.0 ppb (2) 32.0 ppb (30) 0.34 ppb (4) N/A 22.6 μg/m3 (74) 74.0
 
Feb. 27, 2021, 5 p.m. N/A N/A 14.5 ppb (14) N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.36 ppb (5) N/A 24.3 μg/m3 (77) 77.0