AQSQID: 260810020

Site Name: Grand Rapids

Location: Grand Rapids, MI

Reporting: True, Located: True

Current AQI: 29.0

Grand Rapids MI, US: 42.984699, -85.671097

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 19, 2019, 5 a.m. N/A N/A 4.3 ppb (4) N/A N/A 1.0 ppb (1) 38.0 ppb (29) 0.4 ppb (4) N/A 6.6 μg/m3 (28) 29.0
 
Sept. 19, 2019, 4 a.m. N/A N/A 4.0 ppb (4) N/A N/A 1.0 ppb (1) 36.0 ppb (28) 0.4 ppb (4) N/A 5.1 μg/m3 (21) 28.0
 
Sept. 19, 2019, 3 a.m. N/A N/A 4.1 ppb (4) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.41 ppb (5) N/A 3.0 μg/m3 (12) 28.0
 
Sept. 19, 2019, 2 a.m. N/A N/A 7.1 ppb (7) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.46 ppb (5) N/A 2.5 μg/m3 (10) 25.0
 
Sept. 19, 2019, 1 a.m. N/A N/A 17.4 ppb (16) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.63 ppb (7) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 19, 2019, midnight N/A N/A 15.1 ppb (14) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.62 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 11 p.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.45 ppb (5) N/A 3.6 μg/m3 (15) 32.0
 
Sept. 18, 2019, 10 p.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.42 ppb (5) N/A 4.3 μg/m3 (18) 35.0
 
Sept. 18, 2019, 9 p.m. N/A N/A 5.4 ppb (5) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.4 ppb (4) N/A 4.4 μg/m3 (18) 35.0
 
Sept. 18, 2019, 8 p.m. N/A N/A 6.8 ppb (6) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.43 ppb (5) N/A 4.9 μg/m3 (20) 35.0
 
Sept. 18, 2019, 7 p.m. N/A N/A 6.2 ppb (6) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.42 ppb (5) N/A 6.2 μg/m3 (26) 38.0
 
Sept. 18, 2019, 6 p.m. N/A N/A 8.1 ppb (8) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.44 ppb (5) N/A 5.9 μg/m3 (25) 38.0
 
Sept. 18, 2019, 5 p.m. N/A N/A 6.9 ppb (6) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.46 ppb (5) N/A 6.6 μg/m3 (28) 36.0
 
Sept. 18, 2019, 4 p.m. N/A N/A 6.0 ppb (6) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.44 ppb (5) N/A 7.1 μg/m3 (30) 32.0
 
Sept. 18, 2019, 3 p.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.44 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 2 p.m. N/A N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.44 ppb (5) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 18, 2019, 1 p.m. N/A N/A 10.7 ppb (10) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.46 ppb (5) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 18, 2019, noon N/A N/A 12.9 ppb (12) N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2019, 11 a.m. N/A N/A 15.9 ppb (15) N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.55 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2019, 10 a.m. N/A N/A 21.3 ppb (20) N/A N/A 0.0 ppb (0) 5.0 ppb (4) 0.6 ppb (7) N/A 10.3 μg/m3 (43) 43.0
 
Sept. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 11.0 ppb (8) 0.56 ppb (6) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 18, 2019, 8 a.m. N/A N/A 7.3 ppb (7) N/A N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A 11.5 μg/m3 (48) 48.0
 
Sept. 18, 2019, 7 a.m. N/A N/A 7.5 ppb (7) N/A N/A 0.0 ppb (0) N/A 0.43 ppb (5) N/A 10.6 μg/m3 (44) 44.0
 
Sept. 18, 2019, 6 a.m. N/A N/A 6.2 ppb (6) N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.42 ppb (5) N/A 12.5 μg/m3 (51) 51.0
 
Sept. 18, 2019, 5 a.m. N/A N/A 12.4 ppb (11) N/A N/A 0.0 ppb (0) 6.0 ppb (5) 0.48 ppb (5) N/A 9.5 μg/m3 (40) 40.0
 
Sept. 18, 2019, 4 a.m. N/A N/A 11.4 ppb (11) N/A N/A 0.0 ppb (0) 6.0 ppb (5) 0.49 ppb (5) N/A 8.6 μg/m3 (36) 36.0
 
Sept. 18, 2019, 3 a.m. N/A N/A 10.9 ppb (10) N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.5 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 2 a.m. N/A N/A 12.7 ppb (12) N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.48 ppb (5) N/A 9.1 μg/m3 (38) 38.0
 
Sept. 18, 2019, 1 a.m. N/A N/A 11.6 ppb (11) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.5 ppb (6) N/A 6.5 μg/m3 (27) 27.0
 
Sept. 18, 2019, midnight N/A N/A 10.7 ppb (10) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.51 ppb (6) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 17, 2019, 11 p.m. N/A N/A 6.4 ppb (6) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.41 ppb (5) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 17, 2019, 10 p.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.4 ppb (4) N/A 6.3 μg/m3 (26) 26.0
 
Sept. 17, 2019, 9 p.m. N/A N/A 5.6 ppb (5) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.41 ppb (5) N/A 6.7 μg/m3 (28) 28.0
 
Sept. 17, 2019, 8 p.m. N/A N/A 5.7 ppb (5) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.41 ppb (5) N/A 7.2 μg/m3 (30) 30.0
 
Sept. 17, 2019, 7 p.m. N/A N/A 6.2 ppb (6) N/A N/A N/A 28.0 ppb (22) 0.39 ppb (4) N/A 8.3 μg/m3 (35) 35.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.39 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
Sept. 17, 2019, 5 p.m. N/A N/A 6.9 ppb (6) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 17, 2019, 4 p.m. N/A N/A 8.4 ppb (8) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.39 ppb (4) N/A 5.6 μg/m3 (23) 23.0
 
Sept. 17, 2019, 3 p.m. N/A N/A 7.7 ppb (7) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.39 ppb (4) N/A 7.5 μg/m3 (31) 31.0
 
Sept. 17, 2019, 2 p.m. N/A N/A 6.7 ppb (6) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.38 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
Sept. 17, 2019, 1 p.m. N/A N/A 10.9 ppb (10) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.45 ppb (5) N/A 7.4 μg/m3 (31) 31.0
 
Sept. 17, 2019, noon N/A N/A 14.2 ppb (13) N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.53 ppb (6) N/A 7.1 μg/m3 (30) 30.0
 
Sept. 17, 2019, 11 a.m. N/A N/A 10.9 ppb (10) N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.47 ppb (5) N/A 6.9 μg/m3 (29) 29.0
 
Sept. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.4 ppb (4) N/A 6.1 μg/m3 (25) 25.0
 
Sept. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.38 ppb (4) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 17, 2019, 8 a.m. N/A N/A 2.6 ppb (2) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.33 ppb (4) N/A 4.6 μg/m3 (19) 19.0
 
Sept. 17, 2019, 7 a.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.34 ppb (4) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 17, 2019, 6 a.m. N/A N/A 5.5 ppb (5) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.39 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
Sept. 17, 2019, 5 a.m. N/A N/A 12.3 ppb (11) N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.52 ppb (6) N/A 9.3 μg/m3 (39) 39.0
 
Sept. 17, 2019, 4 a.m. N/A N/A 18.5 ppb (17) N/A N/A 0.0 ppb (0) 5.0 ppb (4) 0.6 ppb (7) N/A 11.6 μg/m3 (48) 48.0
 
Sept. 17, 2019, 3 a.m. N/A N/A 21.5 ppb (20) N/A N/A 0.0 ppb (0) 7.0 ppb (5) 0.6 ppb (7) N/A 11.1 μg/m3 (46) 46.0
 
Sept. 17, 2019, 2 a.m. N/A N/A 18.7 ppb (17) N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.56 ppb (6) N/A 9.8 μg/m3 (41) 41.0
 
Sept. 17, 2019, 1 a.m. N/A N/A 15.9 ppb (15) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.54 ppb (6) N/A 10.2 μg/m3 (42) 42.0
 
Sept. 17, 2019, midnight N/A N/A 13.9 ppb (13) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.52 ppb (6) N/A 9.2 μg/m3 (38) 38.0
 
Sept. 16, 2019, 11 p.m. N/A N/A 10.1 ppb (9) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.44 ppb (5) N/A 7.3 μg/m3 (30) 30.0
 
Sept. 16, 2019, 10 p.m. N/A N/A 7.7 ppb (7) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.4 ppb (4) N/A 6.7 μg/m3 (28) 28.0
 
Sept. 16, 2019, 9 p.m. N/A N/A 5.8 ppb (5) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.38 ppb (4) N/A 7.2 μg/m3 (30) 31.0
 
Sept. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.38 ppb (4) N/A 7.4 μg/m3 (31) 32.0
 
Sept. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.38 ppb (4) N/A 7.1 μg/m3 (30) 33.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.37 ppb (4) N/A 7.8 μg/m3 (32) 32.0
 
Sept. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.37 ppb (4) N/A 8.2 μg/m3 (34) 34.0
 
Sept. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.37 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
Sept. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.41 ppb (5) N/A 9.5 μg/m3 (40) 40.0
 
Sept. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.45 ppb (5) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 16, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.48 ppb (5) N/A 11.4 μg/m3 (48) 48.0
 
Sept. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.46 ppb (5) N/A 11.2 μg/m3 (47) 47.0
 
Sept. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.43 ppb (5) N/A 9.7 μg/m3 (40) 40.0
 
Sept. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.41 ppb (5) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.35 ppb (4) N/A 9.5 μg/m3 (40) 40.0
 
Sept. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.35 ppb (4) N/A 8.9 μg/m3 (37) 37.0
 
Sept. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.36 ppb (4) N/A 9.3 μg/m3 (39) 39.0
 
Sept. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.37 ppb (4) N/A 8.8 μg/m3 (37) 37.0
 
Sept. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.38 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Sept. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.39 ppb (4) N/A 10.5 μg/m3 (44) 44.0
 
Sept. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.44 ppb (5) N/A 12.7 μg/m3 (51) 51.0
 
Sept. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.47 ppb (5) N/A 13.5 μg/m3 (53) 53.0
 
Sept. 16, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.43 ppb (5) N/A 10.8 μg/m3 (45) 45.0
 
Sept. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.36 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) 0.34 ppb (4) N/A 10.3 μg/m3 (43) 43.0
 
Sept. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) 0.34 ppb (4) N/A 9.7 μg/m3 (40) 40.0
 
Sept. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.34 ppb (4) N/A 8.5 μg/m3 (35) 35.0
 
Sept. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.32 ppb (4) N/A 7.6 μg/m3 (32) 32.0
 
Sept. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.3 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
Sept. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.29 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.29 ppb (3) N/A 5.6 μg/m3 (23) 28.0
 
Sept. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.28 ppb (3) N/A 4.2 μg/m3 (18) 28.0
 
Sept. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 35.0 ppb (27) 0.28 ppb (3) N/A 4.1 μg/m3 (17) 27.0
 
Sept. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 35.0 ppb (27) 0.28 ppb (3) N/A 5.6 μg/m3 (23) 27.0
 
Sept. 15, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.27 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
Sept. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.28 ppb (3) N/A 5.4 μg/m3 (23) 25.0
 
Sept. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 31.0 ppb (24) 0.29 ppb (3) N/A 4.1 μg/m3 (17) 24.0
 
Sept. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 28.0 ppb (22) 0.3 ppb (3) N/A 7.1 μg/m3 (30) 30.0
 
Sept. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.36 ppb (4) N/A 8.6 μg/m3 (36) 36.0
 
Sept. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.38 ppb (4) N/A 8.5 μg/m3 (35) 35.0
 
Sept. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.41 ppb (5) N/A 9.4 μg/m3 (39) 39.0
 
Sept. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.46 ppb (5) N/A 10.1 μg/m3 (42) 42.0
 
Sept. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.54 ppb (6) N/A 14.3 μg/m3 (55) 55.0
 
Sept. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.57 ppb (6) N/A 16.7 μg/m3 (60) 60.0
 
Sept. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.57 ppb (6) N/A 14.9 μg/m3 (56) 56.0
 
Sept. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.49 ppb (5) N/A 10.3 μg/m3 (43) 43.0
 
Sept. 15, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.34 ppb (4) N/A 5.7 μg/m3 (24) 24.0
 
Sept. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.27 ppb (3) N/A 4.8 μg/m3 (20) 27.0
 
Sept. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.25 ppb (3) N/A 4.5 μg/m3 (19) 27.0
 
Sept. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.24 ppb (3) N/A 4.3 μg/m3 (18) 25.0
 
Sept. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.24 ppb (3) N/A 4.6 μg/m3 (19) 25.0
 
Sept. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.24 ppb (3) N/A 3.8 μg/m3 (16) 25.0
 
Sept. 14, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Sept. 14, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.24 ppb (3) N/A 4.8 μg/m3 (20) 25.0
 
Sept. 14, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.23 ppb (3) N/A 4.7 μg/m3 (20) 23.0
 
Sept. 14, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.23 ppb (3) N/A 4.6 μg/m3 (19) 21.0
 
Sept. 14, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.23 ppb (3) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 14, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.25 ppb (3) N/A 4.2 μg/m3 (18) 18.0
 
Sept. 14, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.24 ppb (3) N/A 4.3 μg/m3 (18) 18.0
 
Sept. 14, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.22 ppb (2) N/A 4.9 μg/m3 (20) 20.0
 
Sept. 14, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 4.1 μg/m3 (17) 18.0
 
Sept. 14, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.21 ppb (2) N/A 3.4 μg/m3 (14) 18.0
 
Sept. 14, 2019, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 21.0 ppb (16) 0.22 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
Sept. 14, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 21.0 ppb (16) 0.23 ppb (3) N/A 4.3 μg/m3 (18) 18.0
 
Sept. 14, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 3.2 μg/m3 (13) 18.0
 
Sept. 14, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 2.3 μg/m3 (10) 18.0
 
Sept. 14, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.23 ppb (3) N/A 2.3 μg/m3 (10) 17.0
 
Sept. 14, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.22 ppb (2) N/A 3.3 μg/m3 (14) 16.0
 
Sept. 14, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.22 ppb (2) N/A 2.5 μg/m3 (10) 18.0
 
Sept. 14, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 24.0 ppb (18) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 18.0
 
Sept. 13, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 27.0 ppb (21) 0.24 ppb (3) N/A 3.3 μg/m3 (14) 21.0
 
Sept. 13, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.23 ppb (3) N/A 3.5 μg/m3 (15) 25.0
 
Sept. 13, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.23 ppb (3) N/A 5.2 μg/m3 (22) 30.0
 
Sept. 13, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A N/A 6.8 μg/m3 (28) 30.0
 
Sept. 13, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
Sept. 13, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 6.2 μg/m3 (26) 26.0
 
Sept. 13, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 12.3 μg/m3 (51) 51.0
 
Sept. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 13.0 μg/m3 (52) 52.0
 
Sept. 13, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 10.7 μg/m3 (45) 45.0
 
Sept. 13, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.94 ppb (10) N/A 7.9 μg/m3 (33) 33.0
 
Sept. 13, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.98 ppb (11) N/A 5.9 μg/m3 (25) 25.0
 
Sept. 13, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.98 ppb (11) N/A 4.8 μg/m3 (20) 20.0
 
Sept. 13, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.94 ppb (10) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 13, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.9 ppb (10) N/A 5.5 μg/m3 (23) 23.0
 
Sept. 13, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.87 ppb (10) N/A 5.4 μg/m3 (23) 23.0
 
Sept. 13, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.84 ppb (9) N/A 2.6 μg/m3 (11) 16.0
 
Sept. 13, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.85 ppb (9) N/A 3.6 μg/m3 (15) 15.0
 
Sept. 13, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.87 ppb (10) N/A 4.1 μg/m3 (17) 17.0
 
Sept. 13, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.89 ppb (10) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 13, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.88 ppb (10) N/A 5.4 μg/m3 (23) 23.0
 
Sept. 13, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.86 ppb (10) N/A 2.9 μg/m3 (12) 12.0
 
Sept. 13, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.86 ppb (10) N/A 2.4 μg/m3 (10) 10.0
 
Sept. 13, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.87 ppb (10) N/A 4.6 μg/m3 (19) 19.0
 
Sept. 13, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.88 ppb (10) N/A 5.2 μg/m3 (22) 22.0
 
Sept. 12, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.88 ppb (10) N/A 4.7 μg/m3 (20) 20.0
 
Sept. 12, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.89 ppb (10) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 12, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.92 ppb (10) N/A 4.1 μg/m3 (17) 17.0
 
Sept. 12, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.92 ppb (10) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 12, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.88 ppb (10) N/A 3.8 μg/m3 (16) 16.0
 
Sept. 12, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.87 ppb (10) N/A 3.2 μg/m3 (13) 13.0
 
Sept. 12, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.87 ppb (10) N/A 4.4 μg/m3 (18) 18.0
 
Sept. 12, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.87 ppb (10) N/A 4.3 μg/m3 (18) 18.0
 
Sept. 12, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.86 ppb (10) N/A 4.1 μg/m3 (17) 17.0
 
Sept. 12, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.85 ppb (9) N/A 4.5 μg/m3 (19) 19.0
 
Sept. 12, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.85 ppb (9) N/A 3.6 μg/m3 (15) 15.0
 
Sept. 12, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.85 ppb (9) N/A 1.8 μg/m3 (8) 10.0
 
Sept. 12, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.83 ppb (9) N/A 0.8 μg/m3 (3) 10.0
 
Sept. 12, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.82 ppb (9) N/A -0.2 μg/m3 (0) 11.0
 
Sept. 12, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.81 ppb (9) N/A -0.5 μg/m3 (0) 12.0
 
Sept. 12, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.87 ppb (10) N/A 3.7 μg/m3 (15) 15.0
 
Sept. 12, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.85 ppb (9) N/A 6.4 μg/m3 (27) 27.0
 
Sept. 12, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.83 ppb (9) N/A 3.7 μg/m3 (15) 24.0