AQSQID: 270530962

Site Name: Minneapolis-Near Road

Location: Minneapolis (E 18th St), MN

Reporting: True, Located: True

Current AQI: 35.0

Minneapolis (E 18th St) MN, US: 44.9653, -93.2551

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 21, 2019, 10 a.m. 37.6 ppb (35) 8.7 ppb (8) N/A 29.0 ppb (27) N/A N/A 15.0 ppb (12) 0.53 ppb (6) N/A 5.0 μg/m3 (21) 35.0
 
March 21, 2019, 9 a.m. 25.5 ppb (24) 4.0 ppb (4) N/A 22.0 ppb (20) N/A N/A 22.0 ppb (17) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
March 21, 2019, 8 a.m. 15.7 ppb (15) 2.2 ppb (2) N/A 14.0 ppb (13) N/A N/A 29.0 ppb (22) 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 7 a.m. 9.0 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.36 ppb (4) N/A 6.0 μg/m3 (25) 28.0
 
March 21, 2019, 6 a.m. 7.6 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.37 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 21, 2019, 5 a.m. 11.3 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 4 a.m. 14.8 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (11) N/A N/A 33.0 ppb (25) 0.43 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 3 a.m. 15.5 ppb (14) 3.7 ppb (3) N/A 12.0 ppb (11) N/A N/A 34.0 ppb (26) 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 2 a.m. 17.0 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A 35.0 ppb (27) 0.49 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 1 a.m. 21.3 ppb (20) 6.0 ppb (6) N/A 15.0 ppb (14) N/A N/A 34.0 ppb (26) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, midnight 21.1 ppb (20) 5.9 ppb (5) N/A 15.0 ppb (14) N/A N/A 36.0 ppb (28) 0.5 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 11 p.m. 21.0 ppb (19) 5.8 ppb (5) N/A 15.0 ppb (14) N/A N/A 35.0 ppb (27) 0.52 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 10 p.m. 27.7 ppb (26) 9.1 ppb (8) N/A 19.0 ppb (18) N/A N/A 34.0 ppb (26) 0.59 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 9 p.m. 26.0 ppb (24) 8.2 ppb (8) N/A 18.0 ppb (17) N/A N/A 36.0 ppb (28) 0.54 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 8 p.m. 24.2 ppb (22) 8.8 ppb (8) N/A 16.0 ppb (15) N/A N/A 39.0 ppb (30) 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 7 p.m. 25.7 ppb (24) 9.7 ppb (9) N/A 16.0 ppb (15) N/A N/A 40.0 ppb (31) 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 6 p.m. 35.5 ppb (33) 14.1 ppb (13) N/A 21.0 ppb (19) N/A N/A 37.0 ppb (28) 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 5 p.m. 39.0 ppb (36) 15.9 ppb (15) N/A 23.0 ppb (21) N/A N/A 31.0 ppb (24) 0.53 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 4 p.m. 38.1 ppb (35) 16.4 ppb (15) N/A 22.0 ppb (20) N/A N/A 33.0 ppb (25) 0.48 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 3 p.m. 36.5 ppb (34) 13.9 ppb (13) N/A 23.0 ppb (21) N/A N/A 32.0 ppb (25) 0.49 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 2 p.m. 19.2 ppb (18) 5.3 ppb (5) N/A 14.0 ppb (13) N/A N/A 39.0 ppb (30) 0.42 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 1 p.m. 18.1 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A N/A 37.0 ppb (28) 0.44 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
March 20, 2019, noon 14.6 ppb (14) 1.3 ppb (1) N/A 13.0 ppb (12) N/A N/A 37.0 ppb (28) 0.44 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 11 a.m. 11.3 ppb (10) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 38.0 ppb (29) 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 10 a.m. 7.8 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 40.0 ppb (31) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 9 a.m. 6.2 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.38 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 8 a.m. 6.6 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.37 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 7 a.m. 8.6 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 6 a.m. 8.4 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 40.0 ppb (31) 0.41 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 5 a.m. 11.3 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 4 a.m. 11.7 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 34.0 ppb (26) 0.44 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 3 a.m. 12.4 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A 34.0 ppb (26) 0.49 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 2 a.m. 13.1 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 33.0 ppb (25) 0.46 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 1 a.m. 13.4 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 34.0 ppb (26) 0.45 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, midnight 12.1 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 35.0 ppb (27) 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 11 p.m. 7.9 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.45 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 10 p.m. 7.1 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.43 ppb (5) N/A 7.0 μg/m3 (29) 33.0
 
March 19, 2019, 9 p.m. 6.6 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 33.0
 
March 19, 2019, 8 p.m. 6.7 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 33.0
 
March 19, 2019, 7 p.m. 8.3 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 32.0
 
March 19, 2019, 6 p.m. 7.7 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 31.0
 
March 19, 2019, 5 p.m. 7.4 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.39 ppb (4) N/A 5.0 μg/m3 (21) 31.0
 
March 19, 2019, 4 p.m. 7.4 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.38 ppb (4) N/A 6.0 μg/m3 (25) 31.0
 
March 19, 2019, 3 p.m. 8.5 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 38.0 ppb (29) 0.39 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
March 19, 2019, 2 p.m. 12.7 ppb (12) 2.4 ppb (2) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 26.0
 
March 19, 2019, 1 p.m. 40.3 ppb (37) 10.6 ppb (10) N/A 30.0 ppb (28) N/A N/A 17.0 ppb (13) 0.62 ppb (7) N/A 7.0 μg/m3 (29) 37.0
 
March 19, 2019, noon 61.5 ppb (58) 17.9 ppb (17) N/A 44.0 ppb (41) N/A N/A 5.0 ppb (4) 0.95 ppb (11) N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 11 a.m. 46.2 ppb (43) 7.6 ppb (7) N/A 39.0 ppb (36) N/A N/A 7.0 ppb (5) 0.63 ppb (7) N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 10 a.m. 38.0 ppb (35) 4.3 ppb (4) N/A 34.0 ppb (31) N/A N/A 12.0 ppb (9) 0.57 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
March 19, 2019, 9 a.m. 33.8 ppb (31) 2.4 ppb (2) N/A 32.0 ppb (30) N/A N/A 16.0 ppb (12) 0.53 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
March 19, 2019, 8 a.m. 33.0 ppb (31) 1.6 ppb (1) N/A 32.0 ppb (30) N/A N/A 17.0 ppb (13) 0.46 ppb (5) N/A 20.0 μg/m3 (67) 67.0
 
March 19, 2019, 7 a.m. 33.9 ppb (31) 1.8 ppb (2) N/A 32.0 ppb (30) N/A N/A 18.0 ppb (14) 0.5 ppb (6) N/A 22.0 μg/m3 (71) 71.0
 
March 19, 2019, 6 a.m. 43.7 ppb (40) 3.6 ppb (3) N/A 40.0 ppb (37) N/A N/A 12.0 ppb (9) 0.58 ppb (6) N/A 25.0 μg/m3 (78) 78.0
 
March 19, 2019, 5 a.m. 37.8 ppb (35) 2.1 ppb (2) N/A 36.0 ppb (33) N/A N/A 17.0 ppb (13) 0.59 ppb (7) N/A 24.0 μg/m3 (76) 76.0
 
March 19, 2019, 4 a.m. 32.1 ppb (30) 1.9 ppb (2) N/A 30.0 ppb (28) N/A N/A 25.0 ppb (19) 0.47 ppb (5) N/A 20.0 μg/m3 (67) 67.0
 
March 19, 2019, 3 a.m. 28.1 ppb (26) 1.9 ppb (2) N/A 26.0 ppb (24) N/A N/A 31.0 ppb (24) 0.52 ppb (6) N/A 21.0 μg/m3 (69) 69.0
 
March 19, 2019, 2 a.m. 25.1 ppb (23) 2.0 ppb (2) N/A 23.0 ppb (21) N/A N/A 34.0 ppb (26) 0.53 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
March 19, 2019, 1 a.m. 18.1 ppb (17) 1.0 ppb (1) N/A 17.0 ppb (16) N/A N/A 41.0 ppb (32) 0.48 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
March 19, 2019, midnight 15.3 ppb (14) 1.3 ppb (1) N/A 14.0 ppb (13) N/A N/A 43.0 ppb (33) 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 11 p.m. 10.6 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A 48.0 ppb (37) 0.41 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 10 p.m. 15.6 ppb (14) 2.9 ppb (3) N/A 13.0 ppb (12) N/A N/A 45.0 ppb (35) 0.48 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 9 p.m. 16.6 ppb (15) 4.6 ppb (4) N/A 12.0 ppb (11) N/A N/A 46.0 ppb (35) 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 8 p.m. 17.1 ppb (16) 4.8 ppb (4) N/A 12.0 ppb (11) N/A N/A 43.0 ppb (33) 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 7 p.m. 13.0 ppb (12) 4.1 ppb (4) N/A 9.0 ppb (8) N/A N/A 46.0 ppb (35) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 35.0
 
March 18, 2019, 6 p.m. 24.4 ppb (23) 9.3 ppb (9) N/A 15.0 ppb (14) N/A N/A 42.0 ppb (32) 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 5 p.m. 27.9 ppb (26) 9.5 ppb (9) N/A 19.0 ppb (18) N/A N/A 39.0 ppb (30) 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 4 p.m. 29.3 ppb (27) 10.5 ppb (10) N/A 19.0 ppb (18) N/A N/A 37.0 ppb (28) 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 3 p.m. 42.0 ppb (39) 15.2 ppb (14) N/A 27.0 ppb (25) N/A N/A 33.0 ppb (25) 0.49 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 2 p.m. 51.0 ppb (47) 19.5 ppb (18) N/A 32.0 ppb (30) N/A N/A 27.0 ppb (21) 0.55 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 1 p.m. 46.3 ppb (43) 16.9 ppb (16) N/A 30.0 ppb (28) N/A N/A 26.0 ppb (20) 0.53 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, noon 33.5 ppb (31) 4.1 ppb (4) N/A 29.0 ppb (27) N/A N/A 24.0 ppb (18) 0.49 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 11 a.m. 28.9 ppb (27) 2.3 ppb (2) N/A 27.0 ppb (25) N/A N/A 25.0 ppb (19) 0.49 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 10 a.m. 20.8 ppb (19) 1.2 ppb (1) N/A 20.0 ppb (19) N/A N/A 33.0 ppb (25) 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 9 a.m. 17.2 ppb (16) 1.6 ppb (1) N/A 16.0 ppb (15) N/A N/A 38.0 ppb (29) 0.41 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 8 a.m. 17.4 ppb (16) 2.6 ppb (2) N/A 15.0 ppb (14) N/A N/A 40.0 ppb (31) 0.41 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 7 a.m. 12.4 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A 42.0 ppb (32) 0.4 ppb (4) N/A 20.0 μg/m3 (67) 67.0
 
March 18, 2019, 6 a.m. 22.8 ppb (21) 1.7 ppb (2) N/A 21.0 ppb (19) N/A N/A 29.0 ppb (22) 0.42 ppb (5) N/A 25.0 μg/m3 (78) 78.0
 
March 18, 2019, 5 a.m. 32.6 ppb (30) 4.0 ppb (4) N/A 29.0 ppb (27) N/A N/A 20.0 ppb (15) 0.51 ppb (6) N/A 26.0 μg/m3 (80) 80.0
 
March 18, 2019, 4 a.m. 23.6 ppb (22) 2.6 ppb (2) N/A 21.0 ppb (19) N/A N/A 29.0 ppb (22) 0.49 ppb (5) N/A 23.0 μg/m3 (73) 73.0
 
March 18, 2019, 3 a.m. 27.9 ppb (26) 6.4 ppb (6) N/A 22.0 ppb (20) N/A N/A 30.0 ppb (23) 0.55 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
March 18, 2019, 2 a.m. 27.5 ppb (25) 5.6 ppb (5) N/A 22.0 ppb (20) N/A N/A 34.0 ppb (26) 0.53 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 1 a.m. 27.2 ppb (25) 5.9 ppb (5) N/A 21.0 ppb (19) N/A N/A 35.0 ppb (27) 0.48 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
March 18, 2019, midnight 22.6 ppb (21) 4.5 ppb (4) N/A 18.0 ppb (17) N/A N/A 40.0 ppb (31) 0.53 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
March 17, 2019, 11 p.m. 21.4 ppb (20) 4.0 ppb (4) N/A 17.0 ppb (16) N/A N/A 41.0 ppb (32) 0.56 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 10 p.m. 18.8 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A 44.0 ppb (34) 0.51 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 9 p.m. 21.4 ppb (20) 5.1 ppb (5) N/A 16.0 ppb (15) N/A N/A 43.0 ppb (33) 0.55 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 8 p.m. 13.6 ppb (13) 3.3 ppb (3) N/A 10.0 ppb (9) N/A N/A 49.0 ppb (38) 0.49 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 7 p.m. 16.1 ppb (15) 4.1 ppb (4) N/A 12.0 ppb (11) N/A N/A 46.0 ppb (35) 0.5 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 6 p.m. 12.8 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A 47.0 ppb (36) 0.44 ppb (5) N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 5 p.m. 13.4 ppb (12) 3.2 ppb (3) N/A 10.0 ppb (9) N/A N/A 45.0 ppb (35) 0.43 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 4 p.m. 13.7 ppb (13) 2.7 ppb (3) N/A 11.0 ppb (10) N/A N/A 42.0 ppb (32) 0.42 ppb (5) N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 3 p.m. 12.2 ppb (11) 1.7 ppb (2) N/A 11.0 ppb (10) N/A N/A 43.0 ppb (33) 0.39 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 2 p.m. 14.0 ppb (13) 1.7 ppb (2) N/A 12.0 ppb (11) N/A N/A 40.0 ppb (31) 0.37 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 1 p.m. 13.1 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 39.0 ppb (30) 0.35 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, noon 11.9 ppb (11) 1.3 ppb (1) N/A 11.0 ppb (10) N/A N/A 41.0 ppb (32) 0.34 ppb (4) N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 11 a.m. 8.8 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 43.0 ppb (33) 0.35 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
March 17, 2019, 10 a.m. 8.2 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 9 a.m. 10.8 ppb (10) 1.1 ppb (1) N/A 10.0 ppb (9) N/A N/A 38.0 ppb (29) 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 8 a.m. 8.9 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 7 a.m. 11.8 ppb (11) 1.5 ppb (1) N/A 10.0 ppb (9) N/A N/A 38.0 ppb (29) 0.38 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 6 a.m. 14.1 ppb (13) 2.2 ppb (2) N/A 12.0 ppb (11) N/A N/A 37.0 ppb (28) 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 5 a.m. 17.8 ppb (16) 2.9 ppb (3) N/A 15.0 ppb (14) N/A N/A 34.0 ppb (26) 0.44 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 4 a.m. 17.7 ppb (16) 2.1 ppb (2) N/A 16.0 ppb (15) N/A N/A 33.0 ppb (25) 0.41 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 3 a.m. 16.1 ppb (15) 1.7 ppb (2) N/A 15.0 ppb (14) N/A N/A 35.0 ppb (27) 0.4 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 2 a.m. 16.9 ppb (16) 1.3 ppb (1) N/A 16.0 ppb (15) N/A N/A 34.0 ppb (26) 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 1 a.m. 19.2 ppb (18) 2.2 ppb (2) N/A 17.0 ppb (16) N/A N/A 33.0 ppb (25) 0.45 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, midnight 21.7 ppb (20) 4.9 ppb (5) N/A 17.0 ppb (16) N/A N/A 34.0 ppb (26) 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 11 p.m. 16.1 ppb (15) 4.1 ppb (4) N/A 12.0 ppb (11) N/A N/A 40.0 ppb (31) 0.49 ppb (5) N/A 7.0 μg/m3 (29) 31.0
 
March 16, 2019, 10 p.m. 13.8 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A 43.0 ppb (33) 0.45 ppb (5) N/A 6.0 μg/m3 (25) 33.0
 
March 16, 2019, 9 p.m. 16.0 ppb (15) 4.7 ppb (4) N/A 11.0 ppb (10) N/A N/A 41.0 ppb (32) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 8 p.m. 15.5 ppb (14) 4.9 ppb (5) N/A 11.0 ppb (10) N/A N/A 40.0 ppb (31) 0.44 ppb (5) N/A 6.0 μg/m3 (25) 31.0
 
March 16, 2019, 7 p.m. 16.4 ppb (15) 5.4 ppb (5) N/A 11.0 ppb (10) N/A N/A 38.0 ppb (29) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 6 p.m. 13.4 ppb (12) 4.3 ppb (4) N/A 9.0 ppb (8) N/A N/A 40.0 ppb (31) 0.42 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 5 p.m. 17.7 ppb (16) 6.9 ppb (6) N/A 11.0 ppb (10) N/A N/A 36.0 ppb (28) 0.44 ppb (5) N/A 6.0 μg/m3 (25) 28.0
 
March 16, 2019, 4 p.m. 17.9 ppb (17) 6.3 ppb (6) N/A 12.0 ppb (11) N/A N/A 34.0 ppb (26) 0.44 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 3 p.m. 24.2 ppb (22) 8.6 ppb (8) N/A 16.0 ppb (15) N/A N/A 31.0 ppb (24) 0.46 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 2 p.m. 30.1 ppb (28) 11.4 ppb (11) N/A 19.0 ppb (18) N/A N/A 29.0 ppb (22) 0.47 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
March 16, 2019, 1 p.m. 33.0 ppb (31) 10.2 ppb (9) N/A 23.0 ppb (21) N/A N/A 24.0 ppb (18) 0.5 ppb (6) N/A 6.0 μg/m3 (25) 31.0
 
March 16, 2019, noon 22.8 ppb (21) 5.1 ppb (5) N/A 18.0 ppb (17) N/A N/A 27.0 ppb (21) 0.42 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 11 a.m. 18.1 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A N/A 30.0 ppb (23) 0.39 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 10 a.m. 11.9 ppb (11) 1.8 ppb (2) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.34 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
March 16, 2019, 9 a.m. 12.5 ppb (12) 1.8 ppb (2) N/A 11.0 ppb (10) N/A N/A 33.0 ppb (25) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 8 a.m. 11.8 ppb (11) 1.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 7 a.m. 12.5 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A 35.0 ppb (27) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 27.0
 
March 16, 2019, 6 a.m. 11.4 ppb (11) 1.9 ppb (2) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 16, 2019, 5 a.m. 11.6 ppb (11) 1.5 ppb (1) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) 0.38 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 16, 2019, 4 a.m. 14.6 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (11) N/A N/A 36.0 ppb (28) 0.36 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 16, 2019, 3 a.m. 17.3 ppb (16) 3.7 ppb (3) N/A 14.0 ppb (13) N/A N/A 34.0 ppb (26) 0.4 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
March 16, 2019, 2 a.m. 17.4 ppb (16) 3.5 ppb (3) N/A 14.0 ppb (13) N/A N/A 34.0 ppb (26) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 26.0
 
March 16, 2019, 1 a.m. 20.2 ppb (19) 5.2 ppb (5) N/A 15.0 ppb (14) N/A N/A 34.0 ppb (26) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 26.0
 
March 16, 2019, midnight 18.5 ppb (17) 5.0 ppb (5) N/A 14.0 ppb (13) N/A N/A 35.0 ppb (27) 0.45 ppb (5) N/A 4.0 μg/m3 (17) 27.0
 
March 15, 2019, 11 p.m. 18.8 ppb (17) 5.7 ppb (5) N/A 13.0 ppb (12) N/A N/A 35.0 ppb (27) 0.47 ppb (5) N/A 5.0 μg/m3 (21) 27.0
 
March 15, 2019, 10 p.m. 18.2 ppb (17) 6.6 ppb (6) N/A 12.0 ppb (11) N/A N/A 37.0 ppb (28) 0.42 ppb (5) N/A 5.0 μg/m3 (21) 28.0
 
March 15, 2019, 9 p.m. 16.6 ppb (15) 5.8 ppb (5) N/A 11.0 ppb (10) N/A N/A 38.0 ppb (29) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 29.0
 
March 15, 2019, 8 p.m. 20.8 ppb (19) 7.4 ppb (7) N/A 13.0 ppb (12) N/A N/A 36.0 ppb (28) 0.43 ppb (5) N/A 5.0 μg/m3 (21) 28.0
 
March 15, 2019, 7 p.m. 24.8 ppb (23) 9.9 ppb (9) N/A 15.0 ppb (14) N/A N/A 35.0 ppb (27) 0.43 ppb (5) N/A 5.0 μg/m3 (21) 27.0
 
March 15, 2019, 6 p.m. 17.4 ppb (16) 6.7 ppb (6) N/A 11.0 ppb (10) N/A N/A 37.0 ppb (28) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 28.0
 
March 15, 2019, 5 p.m. 21.8 ppb (20) 8.8 ppb (8) N/A 13.0 ppb (12) N/A N/A 34.0 ppb (26) 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 4 p.m. 30.9 ppb (29) 13.2 ppb (12) N/A 18.0 ppb (17) N/A N/A 30.0 ppb (23) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 29.0
 
March 15, 2019, 3 p.m. 32.9 ppb (30) 13.7 ppb (13) N/A 19.0 ppb (18) N/A N/A 28.0 ppb (22) 0.43 ppb (5) N/A 6.0 μg/m3 (25) 30.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.49 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.46 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 11 a.m. 25.1 ppb (23) 8.2 ppb (8) N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) 0.39 ppb (4) N/A 4.0 μg/m3 (17) 23.0
 
March 15, 2019, 10 a.m. 20.4 ppb (19) 5.0 ppb (5) N/A 15.0 ppb (14) N/A N/A 29.0 ppb (22) 0.35 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
March 15, 2019, 9 a.m. 14.3 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A 33.0 ppb (25) 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, 8 a.m. 8.7 ppb (8) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
March 15, 2019, 7 a.m. 9.7 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 27.0
 
March 15, 2019, 6 a.m. 10.4 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
March 15, 2019, 5 a.m. 9.5 ppb (9) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 15, 2019, 4 a.m. 17.1 ppb (16) 3.2 ppb (3) N/A 14.0 ppb (13) N/A N/A 35.0 ppb (27) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 27.0
 
March 15, 2019, 3 a.m. 21.8 ppb (20) 4.2 ppb (4) N/A 18.0 ppb (17) N/A N/A 33.0 ppb (25) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, 2 a.m. 23.2 ppb (21) 6.6 ppb (6) N/A 17.0 ppb (16) N/A N/A 29.0 ppb (22) 0.48 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 15, 2019, 1 a.m. 17.5 ppb (16) 5.0 ppb (5) N/A 13.0 ppb (12) N/A N/A 30.0 ppb (23) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, midnight 21.9 ppb (20) 8.2 ppb (8) N/A 14.0 ppb (13) N/A N/A 25.0 ppb (19) 0.45 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 11 p.m. 22.5 ppb (21) 9.8 ppb (9) N/A 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.47 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 14, 2019, 10 p.m. 19.4 ppb (18) 8.2 ppb (8) N/A 11.0 ppb (10) N/A N/A 18.0 ppb (14) 0.48 ppb (5) N/A 4.0 μg/m3 (17) 18.0
 
March 14, 2019, 9 p.m. 20.9 ppb (19) 8.9 ppb (8) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.51 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 8 p.m. 29.8 ppb (28) 13.9 ppb (13) N/A 16.0 ppb (15) N/A N/A 15.0 ppb (12) 0.55 ppb (6) N/A 4.0 μg/m3 (17) 28.0
 
March 14, 2019, 7 p.m. 48.2 ppb (45) 27.4 ppb (25) N/A 21.0 ppb (19) N/A N/A N/A 0.67 ppb (7) N/A 8.0 μg/m3 (33) 45.0
 
March 14, 2019, 6 p.m. 104.1 ppb (101) 72.3 ppb (69) N/A 32.0 ppb (30) N/A N/A 3.0 ppb (2) 0.84 ppb (9) N/A 15.0 μg/m3 (56) 101.0
 
March 14, 2019, 5 p.m. 117.1 ppb (103) 83.3 ppb (81) N/A 34.0 ppb (31) N/A N/A N/A 0.98 ppb (11) N/A 13.0 μg/m3 (52) 103.0
 
March 14, 2019, 4 p.m. 138.6 ppb (107) 101.2 ppb (100) N/A 37.0 ppb (34) N/A N/A N/A 1.04 ppb (12) N/A 19.0 μg/m3 (65) 107.0
 
March 14, 2019, 3 p.m. 126.7 ppb (105) 88.8 ppb (87) N/A 38.0 ppb (35) N/A N/A 2.0 ppb (2) 0.9 ppb (10) N/A 15.0 μg/m3 (56) 105.0
 
March 14, 2019, 2 p.m. 102.7 ppb (100) 68.7 ppb (66) N/A 34.0 ppb (31) N/A N/A 2.0 ppb (2) 0.92 ppb (10) N/A 18.0 μg/m3 (63) 100.0
 
March 14, 2019, 1 p.m. 72.1 ppb (69) 37.0 ppb (34) N/A 35.0 ppb (32) N/A N/A 2.0 ppb (2) 0.84 ppb (9) N/A 10.0 μg/m3 (42) 69.0
 
March 14, 2019, noon 113.3 ppb (102) 76.1 ppb (74) N/A 37.0 ppb (34) N/A N/A 1.0 ppb (1) 0.98 ppb (11) N/A 11.0 μg/m3 (46) 102.0
 
March 14, 2019, 11 a.m. 109.8 ppb (102) 75.7 ppb (73) N/A 34.0 ppb (31) N/A N/A 2.0 ppb (2) 0.99 ppb (11) N/A 9.0 μg/m3 (38) 102.0