AQSQID: 260810020

Site Name: Grand Rapids

Location: Grand Rapids, MI

Reporting: False, Located: True

Current AQI: None

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
May 17, 2019, 7 a.m. N/A N/A 9.7 ppb (9) N/A N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 10.6 μg/m3 (44) 44.0
 
May 17, 2019, 6 a.m. N/A N/A 12.9 ppb (12) N/A N/A N/A 18.0 ppb (14) 0.25 ppb (3) N/A 14.1 μg/m3 (54) 54.0
 
May 17, 2019, 5 a.m. N/A N/A 24.2 ppb (22) N/A N/A 0.0 ppb (0) 7.0 ppb (5) 0.34 ppb (4) N/A 16.9 μg/m3 (60) 60.0
 
May 17, 2019, 4 a.m. N/A N/A 23.1 ppb (21) N/A N/A 0.0 ppb (0) 11.0 ppb (8) 0.38 ppb (4) N/A 16.4 μg/m3 (59) 59.0
 
May 17, 2019, 3 a.m. N/A N/A 15.5 ppb (14) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.29 ppb (3) N/A 16.4 μg/m3 (59) 59.0
 
May 17, 2019, 2 a.m. N/A N/A 8.6 ppb (8) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 9.1 μg/m3 (38) 38.0
 
May 17, 2019, 1 a.m. N/A N/A 7.6 ppb (7) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) N/A 9.1 μg/m3 (38) 38.0
 
May 17, 2019, midnight N/A N/A 6.8 ppb (6) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 7.3 μg/m3 (30) 34.0
 
May 16, 2019, 11 p.m. N/A N/A 5.5 ppb (5) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.14 ppb (2) N/A 7.8 μg/m3 (32) 35.0
 
May 16, 2019, 10 p.m. N/A N/A 7.5 ppb (7) N/A N/A 1.0 ppb (1) 44.0 ppb (34) 0.16 ppb (2) N/A 10.1 μg/m3 (42) 42.0
 
May 16, 2019, 9 p.m. N/A N/A 6.6 ppb (6) N/A N/A 1.0 ppb (1) 48.0 ppb (37) 0.15 ppb (2) N/A 8.1 μg/m3 (34) 37.0
 
May 16, 2019, 8 p.m. N/A N/A 6.7 ppb (6) N/A N/A 1.0 ppb (1) 51.0 ppb (39) 0.14 ppb (2) N/A 7.6 μg/m3 (32) 39.0
 
May 16, 2019, 7 p.m. N/A N/A 10.6 ppb (10) N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.15 ppb (2) N/A 9.3 μg/m3 (39) 39.0
 
May 16, 2019, 6 p.m. N/A N/A 15.4 ppb (14) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) N/A 7.7 μg/m3 (32) 32.0
 
May 16, 2019, 5 p.m. N/A N/A 20.4 ppb (19) N/A N/A 1.0 ppb (1) 34.0 ppb (26) 0.21 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
May 16, 2019, 4 p.m. N/A N/A 11.8 ppb (11) N/A N/A 1.0 ppb (1) 39.0 ppb (30) 0.2 ppb (2) N/A 12.7 μg/m3 (51) 51.0
 
May 16, 2019, 3 p.m. N/A N/A 10.5 ppb (10) N/A N/A 2.0 ppb (3) 42.0 ppb (32) 0.24 ppb (3) N/A 17.8 μg/m3 (62) 62.0
 
May 16, 2019, 2 p.m. N/A N/A 14.0 ppb (13) N/A N/A 3.0 ppb (4) 38.0 ppb (29) 0.26 ppb (3) N/A 13.8 μg/m3 (54) 54.0
 
May 16, 2019, 1 p.m. N/A N/A 28.9 ppb (27) N/A N/A 2.0 ppb (3) 29.0 ppb (22) 0.26 ppb (3) N/A 15.4 μg/m3 (57) 57.0
 
May 16, 2019, noon N/A N/A 50.8 ppb (47) N/A N/A 1.0 ppb (1) 21.0 ppb (16) 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 16, 2019, 11 a.m. N/A N/A 20.2 ppb (19) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.27 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
May 16, 2019, 10 a.m. N/A N/A 22.9 ppb (21) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.29 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
May 16, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 7.0 ppb (5) 0.28 ppb (3) N/A 12.7 μg/m3 (51) 51.0
 
May 16, 2019, 8 a.m. N/A N/A 16.3 ppb (15) N/A N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 11.6 μg/m3 (48) 48.0
 
May 16, 2019, 7 a.m. N/A N/A 16.5 ppb (15) N/A N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 11.6 μg/m3 (48) 48.0
 
May 16, 2019, 6 a.m. N/A N/A 21.3 ppb (20) N/A N/A N/A 11.0 ppb (8) 0.28 ppb (3) N/A 14.7 μg/m3 (56) 56.0
 
May 16, 2019, 5 a.m. N/A N/A 15.2 ppb (14) N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.29 ppb (3) N/A 13.9 μg/m3 (54) 54.0
 
May 16, 2019, 4 a.m. N/A N/A 20.6 ppb (19) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.35 ppb (4) N/A 12.6 μg/m3 (51) 51.0
 
May 16, 2019, 3 a.m. N/A N/A 21.8 ppb (20) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.33 ppb (4) N/A 13.2 μg/m3 (53) 53.0
 
May 16, 2019, 2 a.m. N/A N/A 10.7 ppb (10) N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.21 ppb (2) N/A 10.3 μg/m3 (43) 43.0
 
May 16, 2019, 1 a.m. N/A N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) 44.0 ppb (34) 0.24 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
May 16, 2019, midnight N/A N/A 7.6 ppb (7) N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.19 ppb (2) N/A 10.2 μg/m3 (42) 42.0
 
May 15, 2019, 11 p.m. N/A N/A 6.4 ppb (6) N/A N/A 1.0 ppb (1) 51.0 ppb (39) 0.15 ppb (2) N/A 7.9 μg/m3 (33) 39.0
 
May 15, 2019, 10 p.m. N/A N/A 7.5 ppb (7) N/A N/A 1.0 ppb (1) 51.0 ppb (39) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 39.0
 
May 15, 2019, 9 p.m. N/A N/A 7.3 ppb (7) N/A N/A 1.0 ppb (1) 51.0 ppb (39) 0.15 ppb (2) N/A 8.4 μg/m3 (35) 39.0
 
May 15, 2019, 8 p.m. N/A N/A 9.6 ppb (9) N/A N/A 2.0 ppb (3) 49.0 ppb (38) 0.28 ppb (3) N/A 10.5 μg/m3 (44) 44.0
 
May 15, 2019, 7 p.m. N/A N/A 7.6 ppb (7) N/A N/A 1.0 ppb (1) 50.0 ppb (38) 0.18 ppb (2) N/A 11.6 μg/m3 (48) 48.0
 
May 15, 2019, 6 p.m. N/A N/A 6.1 ppb (6) N/A N/A 1.0 ppb (1) 53.0 ppb (41) 0.14 ppb (2) N/A N/A 41.0
 
May 15, 2019, 5 p.m. N/A N/A 5.9 ppb (5) N/A N/A 1.0 ppb (1) 53.0 ppb (41) 0.14 ppb (2) N/A 8.3 μg/m3 (35) 41.0
 
May 15, 2019, 4 p.m. N/A N/A 5.7 ppb (5) N/A N/A 1.0 ppb (1) 52.0 ppb (40) 0.14 ppb (2) N/A 7.2 μg/m3 (30) 40.0
 
May 15, 2019, 3 p.m. N/A N/A 6.7 ppb (6) N/A N/A 1.0 ppb (1) 49.0 ppb (38) 0.14 ppb (2) N/A 7.6 μg/m3 (32) 38.0
 
May 15, 2019, 2 p.m. N/A N/A 9.3 ppb (9) N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.16 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
May 15, 2019, 1 p.m. N/A N/A 27.5 ppb (25) N/A N/A 1.0 ppb (1) 25.0 ppb (19) 0.26 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
May 15, 2019, noon N/A N/A 39.9 ppb (37) N/A N/A 1.0 ppb (1) 13.0 ppb (10) 0.34 ppb (4) N/A 11.5 μg/m3 (48) 48.0
 
May 15, 2019, 11 a.m. N/A N/A 61.2 ppb (58) N/A N/A 1.0 ppb (1) 5.0 ppb (4) 0.51 ppb (6) N/A 13.5 μg/m3 (53) 58.0
 
May 15, 2019, 10 a.m. N/A N/A 61.1 ppb (58) N/A N/A 1.0 ppb (1) 1.0 ppb (1) 0.51 ppb (6) N/A 12.5 μg/m3 (51) 58.0
 
May 15, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 1.0 ppb (1) 0.41 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
May 15, 2019, 8 a.m. N/A N/A 30.9 ppb (29) N/A N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 13.2 μg/m3 (53) 53.0
 
May 15, 2019, 7 a.m. N/A N/A 29.5 ppb (27) N/A N/A 0.0 ppb (0) N/A 0.3 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
May 15, 2019, 6 a.m. N/A N/A 31.7 ppb (29) N/A N/A N/A 2.0 ppb (2) 0.37 ppb (4) N/A 12.2 μg/m3 (50) 50.0
 
May 15, 2019, 5 a.m. N/A N/A 31.9 ppb (30) N/A N/A 0.0 ppb (0) 3.0 ppb (2) 0.39 ppb (4) N/A 14.4 μg/m3 (55) 55.0
 
May 15, 2019, 4 a.m. N/A N/A 25.1 ppb (23) N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.3 ppb (3) N/A 13.9 μg/m3 (54) 54.0
 
May 15, 2019, 3 a.m. N/A N/A 24.3 ppb (23) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.3 ppb (3) N/A 9.8 μg/m3 (41) 41.0
 
May 15, 2019, 2 a.m. N/A N/A 12.8 ppb (12) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.22 ppb (2) N/A 8.5 μg/m3 (35) 35.0
 
May 15, 2019, 1 a.m. N/A N/A 7.4 ppb (7) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) N/A 4.5 μg/m3 (19) 32.0
 
May 15, 2019, midnight N/A N/A 6.0 ppb (6) N/A N/A 1.0 ppb (1) 46.0 ppb (35) 0.23 ppb (3) N/A 4.7 μg/m3 (20) 35.0
 
May 14, 2019, 11 p.m. N/A N/A 6.5 ppb (6) N/A N/A 1.0 ppb (1) 48.0 ppb (37) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
May 14, 2019, 10 p.m. N/A N/A 7.3 ppb (7) N/A N/A 2.0 ppb (3) 48.0 ppb (37) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
May 14, 2019, 9 p.m. N/A N/A 7.6 ppb (7) N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.21 ppb (2) N/A 6.4 μg/m3 (27) 36.0
 
May 14, 2019, 8 p.m. N/A N/A 5.8 ppb (5) N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.19 ppb (2) N/A 6.1 μg/m3 (25) 36.0
 
May 14, 2019, 7 p.m. N/A N/A 7.9 ppb (7) N/A N/A 2.0 ppb (3) 44.0 ppb (34) 0.25 ppb (3) N/A 5.6 μg/m3 (23) 34.0
 
May 14, 2019, 6 p.m. N/A N/A 6.2 ppb (6) N/A N/A 1.0 ppb (1) 45.0 ppb (35) 0.19 ppb (2) N/A 4.8 μg/m3 (20) 35.0
 
May 14, 2019, 5 p.m. N/A N/A 5.1 ppb (5) N/A N/A 1.0 ppb (1) 44.0 ppb (34) 0.14 ppb (2) N/A 3.6 μg/m3 (15) 34.0
 
May 14, 2019, 4 p.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.12 ppb (1) N/A 3.4 μg/m3 (14) 34.0
 
May 14, 2019, 3 p.m. N/A N/A 5.7 ppb (5) N/A N/A 1.0 ppb (1) 39.0 ppb (30) 0.13 ppb (1) N/A 5.3 μg/m3 (22) 30.0
 
May 14, 2019, 2 p.m. N/A N/A 7.0 ppb (6) N/A N/A 1.0 ppb (1) 36.0 ppb (28) 0.14 ppb (2) N/A 4.1 μg/m3 (17) 28.0
 
May 14, 2019, 1 p.m. N/A N/A 13.7 ppb (13) N/A N/A 1.0 ppb (1) 30.0 ppb (23) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 23.0
 
May 14, 2019, noon N/A N/A 49.1 ppb (45) N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.41 ppb (5) N/A 7.3 μg/m3 (30) 45.0
 
May 13, 2019, 8 a.m. N/A N/A 4.4 ppb (4) N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
May 13, 2019, 7 a.m. N/A N/A 4.7 ppb (4) N/A N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 4.7 μg/m3 (20) 20.0
 
May 13, 2019, 6 a.m. N/A N/A 4.8 ppb (4) N/A N/A N/A 31.0 ppb (24) 0.13 ppb (1) N/A 4.7 μg/m3 (20) 24.0
 
May 13, 2019, 5 a.m. N/A N/A 5.4 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) N/A 5.1 μg/m3 (21) 25.0
 
May 13, 2019, 4 a.m. N/A N/A 5.4 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
May 13, 2019, 3 a.m. N/A N/A 5.4 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
May 13, 2019, 2 a.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.16 ppb (2) N/A 4.7 μg/m3 (20) 26.0
 
May 13, 2019, 1 a.m. N/A N/A 4.6 ppb (4) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.16 ppb (2) N/A 5.2 μg/m3 (22) 27.0
 
May 13, 2019, midnight N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.16 ppb (2) N/A 6.2 μg/m3 (26) 27.0
 
May 12, 2019, 11 p.m. N/A N/A 5.8 ppb (5) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
May 12, 2019, 10 p.m. N/A N/A 5.8 ppb (5) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 12, 2019, 9 p.m. N/A N/A 6.5 ppb (6) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 6.6 μg/m3 (28) 29.0
 
May 12, 2019, 8 p.m. N/A N/A 5.3 ppb (5) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) N/A 4.9 μg/m3 (20) 32.0
 
May 12, 2019, 7 p.m. N/A N/A 6.2 ppb (6) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) N/A 4.3 μg/m3 (18) 34.0
 
May 12, 2019, 6 p.m. N/A N/A 4.6 ppb (4) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) N/A 3.4 μg/m3 (14) 35.0
 
May 12, 2019, 5 p.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 3.6 μg/m3 (15) 32.0
 
May 12, 2019, 4 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) N/A 3.4 μg/m3 (14) 33.0
 
May 12, 2019, 3 p.m. N/A N/A 5.2 ppb (5) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.15 ppb (2) N/A 3.2 μg/m3 (13) 29.0
 
May 12, 2019, 2 p.m. N/A N/A 5.1 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 3.7 μg/m3 (15) 25.0
 
May 12, 2019, 1 p.m. N/A N/A 4.4 ppb (4) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 3.5 μg/m3 (15) 24.0
 
May 12, 2019, noon N/A N/A 5.9 ppb (5) N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 3.5 μg/m3 (15) 22.0
 
May 12, 2019, 11 a.m. N/A N/A 6.4 ppb (6) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 12, 2019, 10 a.m. N/A N/A 6.0 ppb (6) N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) N/A 4.7 μg/m3 (20) 23.0
 
May 12, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) N/A 4.5 μg/m3 (19) 25.0
 
May 12, 2019, 8 a.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 3.0 μg/m3 (12) 25.0
 
May 12, 2019, 7 a.m. N/A N/A 3.9 ppb (4) N/A N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
May 12, 2019, 6 a.m. N/A N/A 5.1 ppb (5) N/A N/A N/A 33.0 ppb (25) 0.16 ppb (2) N/A 2.2 μg/m3 (9) 25.0
 
May 12, 2019, 5 a.m. N/A N/A 5.6 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 3.6 μg/m3 (15) 25.0
 
May 12, 2019, 4 a.m. N/A N/A 4.8 ppb (4) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 3.9 μg/m3 (16) 25.0
 
May 12, 2019, 3 a.m. N/A N/A 6.2 ppb (6) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.16 ppb (2) N/A 5.9 μg/m3 (25) 26.0
 
May 12, 2019, 2 a.m. N/A N/A 4.9 ppb (5) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.16 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
May 12, 2019, 1 a.m. N/A N/A 3.6 ppb (3) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 3.9 μg/m3 (16) 31.0
 
May 12, 2019, midnight N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) N/A 3.2 μg/m3 (13) 32.0
 
May 11, 2019, 11 p.m. N/A N/A 2.8 ppb (3) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) N/A 4.4 μg/m3 (18) 30.0
 
May 11, 2019, 10 p.m. N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A 5.1 μg/m3 (21) 30.0
 
May 11, 2019, 9 p.m. N/A N/A 5.5 ppb (5) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 6.6 μg/m3 (28) 31.0
 
May 11, 2019, 8 p.m. N/A N/A 4.2 ppb (4) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 3.8 μg/m3 (16) 31.0
 
May 11, 2019, 7 p.m. N/A N/A 3.2 ppb (3) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.15 ppb (2) N/A 3.5 μg/m3 (15) 31.0
 
May 11, 2019, 6 p.m. N/A N/A 2.8 ppb (3) N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.14 ppb (2) N/A 3.3 μg/m3 (14) 32.0
 
May 11, 2019, 5 p.m. N/A N/A 2.6 ppb (2) N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
May 11, 2019, 4 p.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) N/A 2.6 μg/m3 (11) 32.0
 
May 11, 2019, 3 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 32.0
 
May 11, 2019, 2 p.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 28.0
 
May 11, 2019, 1 p.m. N/A N/A 4.4 ppb (4) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) N/A 2.8 μg/m3 (12) 25.0
 
May 11, 2019, noon N/A N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A 3.8 μg/m3 (16) 24.0
 
May 11, 2019, 11 a.m. N/A N/A 12.4 ppb (11) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.27 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
May 11, 2019, 10 a.m. N/A N/A 25.9 ppb (24) N/A N/A 0.0 ppb (0) 3.0 ppb (2) 0.35 ppb (4) N/A 8.5 μg/m3 (35) 35.0
 
May 11, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 3.0 ppb (2) 0.29 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
May 11, 2019, 8 a.m. N/A N/A 18.1 ppb (17) N/A N/A 0.0 ppb (0) 6.0 ppb (5) N/A N/A 9.5 μg/m3 (40) 40.0
 
May 11, 2019, 7 a.m. N/A N/A 16.0 ppb (15) N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 8.5 μg/m3 (35) 35.0
 
May 11, 2019, 6 a.m. N/A N/A 11.7 ppb (11) N/A N/A N/A 17.0 ppb (13) 0.21 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
May 11, 2019, 5 a.m. N/A N/A 8.5 ppb (8) N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.19 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
May 11, 2019, 4 a.m. N/A N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 10.2 μg/m3 (42) 42.0
 
May 11, 2019, 3 a.m. N/A N/A 12.1 ppb (11) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.24 ppb (3) N/A 9.8 μg/m3 (41) 41.0
 
May 11, 2019, 2 a.m. N/A N/A 14.3 ppb (13) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.25 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
May 11, 2019, 1 a.m. N/A N/A 12.1 ppb (11) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.22 ppb (2) N/A 4.8 μg/m3 (20) 25.0
 
May 11, 2019, midnight N/A N/A 7.1 ppb (7) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) N/A 5.2 μg/m3 (22) 29.0
 
May 10, 2019, 11 p.m. N/A N/A 4.2 ppb (4) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) N/A 3.8 μg/m3 (16) 31.0
 
May 10, 2019, 10 p.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.13 ppb (1) N/A 4.2 μg/m3 (18) 30.0
 
May 10, 2019, 9 p.m. N/A N/A 4.8 ppb (4) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
May 10, 2019, 8 p.m. N/A N/A 4.8 ppb (4) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) N/A 3.8 μg/m3 (16) 31.0
 
May 10, 2019, 7 p.m. N/A N/A 5.9 ppb (5) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 2.9 μg/m3 (12) 28.0
 
May 10, 2019, 6 p.m. N/A N/A 4.7 ppb (4) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 2.1 μg/m3 (9) 28.0
 
May 10, 2019, 5 p.m. N/A N/A 4.8 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 28.0
 
May 10, 2019, 4 p.m. N/A N/A 5.7 ppb (5) N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 26.0
 
May 10, 2019, 3 p.m. N/A N/A 6.8 ppb (6) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) N/A 4.2 μg/m3 (18) 25.0
 
May 10, 2019, 2 p.m. N/A N/A 9.3 ppb (9) N/A N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 1.8 μg/m3 (8) 24.0
 
May 10, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 1.5 μg/m3 (6) 23.0
 
May 10, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 4.4 μg/m3 (18) 20.0
 
May 10, 2019, 11 a.m. N/A N/A 7.8 ppb (7) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 4.9 μg/m3 (20) 20.0
 
May 10, 2019, 10 a.m. N/A N/A 5.1 ppb (5) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 22.0
 
May 10, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A 2.4 μg/m3 (10) 22.0
 
May 10, 2019, 8 a.m. N/A N/A 2.8 ppb (3) N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
May 10, 2019, 7 a.m. N/A N/A 2.4 ppb (2) N/A N/A 0.0 ppb (0) N/A 0.13 ppb (1) N/A 1.5 μg/m3 (6) 6.0
 
May 10, 2019, 6 a.m. N/A N/A 2.5 ppb (2) N/A N/A N/A 27.0 ppb (21) 0.13 ppb (1) N/A 2.6 μg/m3 (11) 21.0
 
May 10, 2019, 5 a.m. N/A N/A 2.8 ppb (3) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.13 ppb (1) N/A 4.6 μg/m3 (19) 22.0
 
May 10, 2019, 4 a.m. N/A N/A 3.4 ppb (3) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 4.3 μg/m3 (18) 20.0
 
May 10, 2019, 3 a.m. N/A N/A 3.5 ppb (3) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 3.5 μg/m3 (15) 20.0
 
May 10, 2019, 2 a.m. N/A N/A 4.2 ppb (4) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A 3.6 μg/m3 (15) 20.0
 
May 10, 2019, 1 a.m. N/A N/A 4.3 ppb (4) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) N/A 4.8 μg/m3 (20) 25.0
 
May 10, 2019, midnight N/A N/A 3.8 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) N/A 2.5 μg/m3 (10) 28.0
 
May 9, 2019, 11 p.m. N/A N/A 4.8 ppb (4) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 2.1 μg/m3 (9) 28.0
 
May 9, 2019, 10 p.m. N/A N/A 4.1 ppb (4) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A 1.5 μg/m3 (6) 30.0
 
May 9, 2019, 9 p.m. N/A N/A 3.7 ppb (3) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) N/A 2.3 μg/m3 (10) 32.0
 
May 9, 2019, 8 p.m. N/A N/A 4.2 ppb (4) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 35.0
 
May 9, 2019, 7 p.m. N/A N/A 5.8 ppb (5) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 7.4 μg/m3 (31) 38.0
 
May 9, 2019, 6 p.m. N/A N/A 7.1 ppb (7) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) N/A 8.7 μg/m3 (36) 36.0
 
May 9, 2019, 5 p.m. N/A N/A 7.9 ppb (7) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) N/A 11.1 μg/m3 (46) 46.0
 
May 9, 2019, 4 p.m. N/A N/A 24.1 ppb (22) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.3 ppb (3) N/A 20.2 μg/m3 (67) 67.0
 
May 9, 2019, 3 p.m. N/A N/A 23.6 ppb (22) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.29 ppb (3) N/A 16.7 μg/m3 (60) 60.0
 
May 9, 2019, 2 p.m. N/A N/A 17.1 ppb (16) N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.3 ppb (3) N/A 10.1 μg/m3 (42) 42.0
 
May 9, 2019, 1 p.m. N/A N/A 19.2 ppb (18) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.27 ppb (3) N/A 9.3 μg/m3 (39) 39.0
 
May 9, 2019, noon N/A N/A 8.3 ppb (8) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.21 ppb (2) N/A 6.8 μg/m3 (28) 28.0
 
May 9, 2019, 11 a.m. N/A N/A 10.9 ppb (10) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.2 ppb (2) N/A 6.1 μg/m3 (25) 25.0
 
May 9, 2019, 10 a.m. N/A N/A 5.5 ppb (5) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A 3.5 μg/m3 (15) 21.0
 
May 9, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.19 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
May 9, 2019, 8 a.m. N/A N/A 6.5 ppb (6) N/A N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 13.1 μg/m3 (52) 52.0
 
May 9, 2019, 7 a.m. N/A N/A 3.4 ppb (3) N/A N/A 1.0 ppb (1) N/A 0.14 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
May 9, 2019, 6 a.m. N/A N/A 3.3 ppb (3) N/A N/A N/A 39.0 ppb (30) 0.13 ppb (1) N/A 5.6 μg/m3 (23) 30.0
 
May 9, 2019, 5 a.m. N/A N/A 3.5 ppb (3) N/A N/A 1.0 ppb (1) 38.0 ppb (29) 0.14 ppb (2) N/A 3.6 μg/m3 (15) 29.0