AQSQID: 490570002

Site Name: Ogden #2

Location: Ogden, UT

Reporting: True, Located: True

Current AQI: 104.0

Ogden UT, US: 41.206402, -111.975197

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 1 p.m. 123.0 ppb (104) 83.0 ppb (81) N/A 40.0 ppb (37) N/A N/A 3.0 ppb (2) 1.1 ppb (12) N/A 6.5 μg/m3 (27) 104.0
 
March 19, 2019, noon 67.0 ppb (64) 29.0 ppb (27) N/A 37.0 ppb (34) N/A N/A 2.0 ppb (2) 1.1 ppb (12) N/A 5.2 μg/m3 (22) 64.0
 
March 19, 2019, 11 a.m. 48.0 ppb (44) 13.0 ppb (12) N/A 35.0 ppb (32) N/A N/A 4.0 ppb (3) 0.6 ppb (7) N/A 4.5 μg/m3 (19) 44.0
 
March 19, 2019, 10 a.m. 34.0 ppb (31) 4.0 ppb (4) N/A 29.0 ppb (27) N/A N/A 7.0 ppb (5) 0.4 ppb (4) N/A 3.7 μg/m3 (15) 31.0
 
March 19, 2019, 9 a.m. 31.0 ppb (29) 4.0 ppb (4) N/A 27.0 ppb (25) N/A N/A 10.0 ppb (8) 2.0 ppb (22) N/A 3.4 μg/m3 (14) 29.0
 
March 19, 2019, 8 a.m. 34.0 ppb (31) 4.0 ppb (4) N/A 29.0 ppb (27) N/A N/A 8.0 ppb (6) 1.0 ppb (11) N/A 3.3 μg/m3 (14) 31.0
 
March 19, 2019, 7 a.m. 33.0 ppb (31) 4.0 ppb (4) N/A 29.0 ppb (27) N/A N/A 7.0 ppb (5) 0.9 ppb (10) N/A 3.8 μg/m3 (16) 31.0
 
March 19, 2019, 6 a.m. 43.0 ppb (40) 9.0 ppb (8) N/A 34.0 ppb (31) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 4.2 μg/m3 (18) 40.0
 
March 19, 2019, 5 a.m. 45.0 ppb (42) 9.0 ppb (8) N/A 36.0 ppb (33) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 4.8 μg/m3 (20) 42.0
 
March 19, 2019, 4 a.m. 51.0 ppb (47) 15.0 ppb (14) N/A 37.0 ppb (34) N/A N/A 5.0 ppb (4) 0.4 ppb (4) N/A 5.5 μg/m3 (23) 47.0
 
March 19, 2019, 3 a.m. 33.0 ppb (31) 3.0 ppb (3) N/A 30.0 ppb (28) N/A N/A 13.0 ppb (10) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 31.0
 
March 19, 2019, 2 a.m. 20.0 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A N/A 31.0 ppb (24) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 24.0
 
March 19, 2019, 1 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 40.0 ppb (31) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 31.0
 
March 19, 2019, midnight 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 1.3 μg/m3 (5) 35.0
 
March 18, 2019, 11 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.0 ppb (0) N/A 1.6 μg/m3 (7) 36.0
 
March 18, 2019, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.0 ppb (0) N/A 3.6 μg/m3 (15) 38.0
 
March 18, 2019, 9 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 38.0
 
March 18, 2019, 8 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A 47.0 ppb (36) 0.0 ppb (0) N/A 8.6 μg/m3 (36) 36.0
 
March 18, 2019, 7 p.m. 17.0 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 9.9 μg/m3 (41) 41.0
 
March 18, 2019, 6 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 11.0 ppb (10) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 9.5 μg/m3 (40) 40.0
 
March 18, 2019, 5 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A N/A 46.0 ppb (35) 0.0 ppb (0) N/A 8.1 μg/m3 (34) 35.0
 
March 18, 2019, 4 p.m. 32.0 ppb (30) 12.0 ppb (11) N/A 20.0 ppb (19) N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A 8.9 μg/m3 (37) 37.0
 
March 18, 2019, 3 p.m. 76.0 ppb (73) 38.0 ppb (35) N/A 38.0 ppb (35) N/A N/A 15.0 ppb (12) 0.3 ppb (3) N/A 10.1 μg/m3 (42) 73.0
 
March 18, 2019, 2 p.m. 133.0 ppb (106) 92.0 ppb (90) N/A 41.0 ppb (38) N/A N/A 4.0 ppb (3) 1.4 ppb (16) N/A 7.2 μg/m3 (30) 106.0
 
March 18, 2019, 1 p.m. 90.0 ppb (88) 51.0 ppb (47) N/A 39.0 ppb (36) N/A N/A 2.0 ppb (2) 0.8 ppb (9) N/A 5.0 μg/m3 (21) 88.0
 
March 18, 2019, noon 68.0 ppb (65) 31.0 ppb (29) N/A 36.0 ppb (33) N/A N/A 2.0 ppb (2) 0.6 ppb (7) N/A 4.5 μg/m3 (19) 65.0
 
March 18, 2019, 11 a.m. 50.0 ppb (46) 16.0 ppb (15) N/A 33.0 ppb (31) N/A N/A 2.0 ppb (2) N/A N/A 3.1 μg/m3 (13) 46.0
 
March 18, 2019, 10 a.m. 43.0 ppb (40) 11.0 ppb (10) N/A 32.0 ppb (30) N/A N/A 3.0 ppb (2) 0.3 ppb (3) N/A 2.8 μg/m3 (12) 40.0
 
March 18, 2019, 9 a.m. 32.0 ppb (30) 4.0 ppb (4) N/A 28.0 ppb (26) N/A N/A 5.0 ppb (4) 0.3 ppb (3) N/A 2.7 μg/m3 (11) 30.0
 
March 18, 2019, 8 a.m. 29.0 ppb (27) 3.0 ppb (3) N/A 26.0 ppb (24) N/A N/A 7.0 ppb (5) 0.2 ppb (2) N/A 2.8 μg/m3 (12) 27.0
 
March 18, 2019, 7 a.m. 31.0 ppb (29) 4.0 ppb (4) N/A 26.0 ppb (24) N/A N/A 5.0 ppb (4) 0.3 ppb (3) N/A 4.8 μg/m3 (20) 29.0
 
March 18, 2019, 6 a.m. 34.0 ppb (31) 6.0 ppb (6) N/A 28.0 ppb (26) N/A N/A 5.0 ppb (4) 0.3 ppb (3) N/A 4.2 μg/m3 (18) 31.0
 
March 18, 2019, 5 a.m. 38.0 ppb (35) 7.0 ppb (6) N/A 31.0 ppb (29) N/A N/A 4.0 ppb (3) 0.4 ppb (4) N/A 6.7 μg/m3 (28) 35.0
 
March 18, 2019, 4 a.m. 44.0 ppb (41) 9.0 ppb (8) N/A 34.0 ppb (31) N/A N/A 4.0 ppb (3) 0.5 ppb (6) N/A 5.7 μg/m3 (24) 41.0
 
March 18, 2019, 3 a.m. 43.0 ppb (40) 8.0 ppb (7) N/A 35.0 ppb (32) N/A N/A 7.0 ppb (5) 0.5 ppb (6) N/A 4.8 μg/m3 (20) 40.0
 
March 18, 2019, 2 a.m. 28.0 ppb (26) 2.0 ppb (2) N/A 26.0 ppb (24) N/A N/A 20.0 ppb (15) 0.3 ppb (3) N/A 3.9 μg/m3 (16) 26.0
 
March 18, 2019, 1 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 2.3 μg/m3 (10) 35.0
 
March 18, 2019, midnight 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) 0.0 ppb (0) N/A 4.3 μg/m3 (18) 39.0
 
March 17, 2019, 11 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (42) 0.0 ppb (0) N/A 5.3 μg/m3 (22) 42.0
 
March 17, 2019, 10 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 56.0 ppb (43) 0.0 ppb (0) N/A 6.9 μg/m3 (29) 43.0
 
March 17, 2019, 9 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 55.0 ppb (42) 0.0 ppb (0) N/A 9.7 μg/m3 (40) 42.0
 
March 17, 2019, 8 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (41) 0.0 ppb (0) N/A 11.1 μg/m3 (46) 46.0
 
March 17, 2019, 7 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (41) 0.0 ppb (0) N/A 11.7 μg/m3 (49) 49.0
 
March 17, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 49.0 ppb (38) 0.1 ppb (1) N/A 7.8 μg/m3 (32) 38.0
 
March 17, 2019, 5 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 6.1 μg/m3 (25) 34.0
 
March 17, 2019, 4 p.m. 26.0 ppb (24) 10.0 ppb (9) N/A 16.0 ppb (15) N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A 7.1 μg/m3 (30) 30.0
 
March 17, 2019, 3 p.m. 52.0 ppb (48) 24.0 ppb (22) N/A 28.0 ppb (26) N/A N/A 18.0 ppb (14) 0.2 ppb (2) N/A 7.6 μg/m3 (32) 48.0
 
March 17, 2019, 2 p.m. 59.0 ppb (55) 28.0 ppb (26) N/A 31.0 ppb (29) N/A N/A 7.0 ppb (5) 0.5 ppb (6) N/A 6.9 μg/m3 (29) 55.0
 
March 17, 2019, 1 p.m. 53.0 ppb (49) 19.0 ppb (18) N/A 34.0 ppb (31) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 6.6 μg/m3 (28) 49.0
 
March 17, 2019, noon 49.0 ppb (45) 16.0 ppb (15) N/A 33.0 ppb (31) N/A N/A 2.0 ppb (2) 0.5 ppb (6) N/A 8.2 μg/m3 (34) 45.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 9.9 μg/m3 (41) 41.0
 
March 17, 2019, 10 a.m. 45.0 ppb (42) 11.0 ppb (10) N/A 34.0 ppb (31) N/A N/A 3.0 ppb (2) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 42.0
 
March 17, 2019, 9 a.m. 42.0 ppb (39) 9.0 ppb (8) N/A 32.0 ppb (30) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 6.2 μg/m3 (26) 39.0
 
March 17, 2019, 8 a.m. 43.0 ppb (40) 10.0 ppb (9) N/A 32.0 ppb (30) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 7.6 μg/m3 (32) 40.0
 
March 17, 2019, 7 a.m. 56.0 ppb (52) 22.0 ppb (20) N/A 34.0 ppb (31) N/A N/A 2.0 ppb (2) 0.6 ppb (7) N/A 11.9 μg/m3 (50) 52.0
 
March 17, 2019, 6 a.m. 54.0 ppb (50) 18.0 ppb (17) N/A 36.0 ppb (33) N/A N/A 3.0 ppb (2) 0.6 ppb (7) N/A 15.5 μg/m3 (57) 57.0
 
March 17, 2019, 5 a.m. 68.0 ppb (65) 28.0 ppb (26) N/A 40.0 ppb (37) N/A N/A 2.0 ppb (2) 0.7 ppb (8) N/A 11.6 μg/m3 (48) 65.0
 
March 17, 2019, 4 a.m. 67.0 ppb (64) 24.0 ppb (22) N/A 43.0 ppb (40) N/A N/A 3.0 ppb (2) 0.7 ppb (8) N/A 11.8 μg/m3 (49) 64.0
 
March 17, 2019, 3 a.m. 60.0 ppb (56) 13.0 ppb (12) N/A 47.0 ppb (44) N/A N/A 4.0 ppb (3) 0.5 ppb (6) N/A 11.3 μg/m3 (47) 56.0
 
March 17, 2019, 2 a.m. 62.0 ppb (59) 13.0 ppb (12) N/A N/A N/A N/A 9.0 ppb (7) 0.2 ppb (2) N/A 7.2 μg/m3 (30) 59.0
 
March 17, 2019, 1 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 46.0 ppb (35) 0.1 ppb (1) N/A 9.3 μg/m3 (39) 39.0
 
March 17, 2019, midnight 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 51.0 ppb (39) 0.0 ppb (0) N/A 7.4 μg/m3 (31) 39.0
 
March 16, 2019, 11 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.0 ppb (0) N/A 6.5 μg/m3 (27) 40.0
 
March 16, 2019, 10 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) 0.0 ppb (0) N/A 7.5 μg/m3 (31) 39.0
 
March 16, 2019, 9 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 50.0 ppb (38) 0.0 ppb (0) N/A 8.6 μg/m3 (36) 38.0
 
March 16, 2019, 8 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A 49.0 ppb (38) 0.0 ppb (0) N/A 8.6 μg/m3 (36) 38.0
 
March 16, 2019, 7 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A 49.0 ppb (38) 0.0 ppb (0) N/A 7.5 μg/m3 (31) 38.0
 
March 16, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 49.0 ppb (38) 0.0 ppb (0) N/A 6.3 μg/m3 (26) 38.0
 
March 16, 2019, 5 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 6.5 μg/m3 (27) 34.0
 
March 16, 2019, 4 p.m. 33.0 ppb (31) 13.0 ppb (12) N/A 19.0 ppb (18) N/A N/A 31.0 ppb (24) 0.1 ppb (1) N/A 7.0 μg/m3 (29) 31.0
 
March 16, 2019, 3 p.m. 60.0 ppb (56) 30.0 ppb (28) N/A 30.0 ppb (28) N/A N/A 19.0 ppb (15) 0.4 ppb (4) N/A 7.2 μg/m3 (30) 56.0
 
March 16, 2019, 2 p.m. 87.0 ppb (85) 50.0 ppb (46) N/A 36.0 ppb (33) N/A N/A 6.0 ppb (5) 0.7 ppb (8) N/A 6.5 μg/m3 (27) 85.0
 
March 16, 2019, 1 p.m. 70.0 ppb (67) 33.0 ppb (31) N/A 36.0 ppb (33) N/A N/A 3.0 ppb (2) 0.6 ppb (7) N/A 5.8 μg/m3 (24) 67.0
 
March 16, 2019, noon 60.0 ppb (56) 24.0 ppb (22) N/A 36.0 ppb (33) N/A N/A 2.0 ppb (2) 0.5 ppb (6) N/A 4.5 μg/m3 (19) 56.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) 0.5 ppb (6) N/A 4.8 μg/m3 (20) 20.0
 
March 16, 2019, 10 a.m. 52.0 ppb (48) 16.0 ppb (15) N/A 36.0 ppb (33) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A 5.4 μg/m3 (23) 48.0
 
March 16, 2019, 9 a.m. 52.0 ppb (48) 16.0 ppb (15) N/A 36.0 ppb (33) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 7.8 μg/m3 (32) 48.0
 
March 16, 2019, 8 a.m. 48.0 ppb (44) 12.0 ppb (11) N/A 35.0 ppb (32) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 6.6 μg/m3 (28) 44.0
 
March 16, 2019, 7 a.m. 51.0 ppb (47) 15.0 ppb (14) N/A 35.0 ppb (32) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 8.3 μg/m3 (35) 47.0
 
March 16, 2019, 6 a.m. 58.0 ppb (54) 23.0 ppb (21) N/A 35.0 ppb (32) N/A N/A 2.0 ppb (2) 0.6 ppb (7) N/A 8.8 μg/m3 (37) 54.0
 
March 16, 2019, 5 a.m. 56.0 ppb (52) 20.0 ppb (19) N/A 36.0 ppb (33) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 9.7 μg/m3 (40) 52.0
 
March 16, 2019, 4 a.m. 53.0 ppb (49) 17.0 ppb (16) N/A 36.0 ppb (33) N/A N/A 4.0 ppb (3) 0.6 ppb (7) N/A 10.3 μg/m3 (43) 49.0
 
March 16, 2019, 3 a.m. 36.0 ppb (33) 6.0 ppb (6) N/A 31.0 ppb (29) N/A N/A 10.0 ppb (8) 0.4 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 2 a.m. 21.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A 27.0 ppb (21) 0.2 ppb (2) N/A 14.1 μg/m3 (54) 54.0
 
March 16, 2019, 1 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A 10.2 μg/m3 (42) 42.0
 
March 16, 2019, midnight 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 9.7 μg/m3 (40) 40.0
 
March 15, 2019, 11 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 7.8 μg/m3 (32) 35.0
 
March 15, 2019, 10 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 8.9 μg/m3 (37) 37.0
 
March 15, 2019, 9 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.0 ppb (0) N/A 6.2 μg/m3 (26) 35.0
 
March 15, 2019, 8 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 4.7 μg/m3 (20) 35.0
 
March 15, 2019, 7 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 4.2 μg/m3 (18) 35.0
 
March 15, 2019, 6 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 35.0
 
March 15, 2019, 5 p.m. 9.0 ppb (8) 5.0 ppb (5) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.0 ppb (0) N/A 4.4 μg/m3 (18) 32.0
 
March 15, 2019, 4 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 32.0
 
March 15, 2019, 3 p.m. 75.0 ppb (72) 44.0 ppb (41) N/A 31.0 ppb (29) N/A N/A 17.0 ppb (13) 0.7 ppb (8) N/A 7.7 μg/m3 (32) 72.0
 
March 15, 2019, 2 p.m. 129.0 ppb (105) 90.0 ppb (88) N/A 39.0 ppb (36) N/A N/A 4.0 ppb (3) 1.3 ppb (14) N/A 7.8 μg/m3 (32) 105.0
 
March 15, 2019, 1 p.m. 80.0 ppb (78) 42.0 ppb (39) N/A 38.0 ppb (35) N/A N/A 3.0 ppb (2) 0.7 ppb (8) N/A 5.9 μg/m3 (25) 78.0
 
March 15, 2019, noon 88.0 ppb (86) 48.0 ppb (44) N/A 40.0 ppb (37) N/A N/A 3.0 ppb (2) 0.6 ppb (7) N/A 5.7 μg/m3 (24) 86.0
 
March 15, 2019, 11 a.m. 72.0 ppb (69) 35.0 ppb (32) N/A 37.0 ppb (34) N/A N/A N/A 0.4 ppb (4) N/A 4.7 μg/m3 (20) 69.0
 
March 15, 2019, 10 a.m. 56.0 ppb (52) 21.0 ppb (19) N/A 35.0 ppb (32) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A 4.3 μg/m3 (18) 52.0
 
March 15, 2019, 9 a.m. 44.0 ppb (41) 9.0 ppb (8) N/A 34.0 ppb (31) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A 3.5 μg/m3 (15) 41.0
 
March 15, 2019, 8 a.m. 48.0 ppb (44) 13.0 ppb (12) N/A 35.0 ppb (32) N/A N/A 2.0 ppb (2) 0.4 ppb (4) N/A 4.8 μg/m3 (20) 44.0
 
March 15, 2019, 7 a.m. 57.0 ppb (53) 20.0 ppb (19) N/A 37.0 ppb (34) N/A N/A 2.0 ppb (2) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 53.0
 
March 15, 2019, 6 a.m. 53.0 ppb (49) 16.0 ppb (15) N/A 37.0 ppb (34) N/A N/A 3.0 ppb (2) 0.3 ppb (3) N/A 6.4 μg/m3 (27) 49.0
 
March 15, 2019, 5 a.m. 40.0 ppb (37) 5.0 ppb (5) N/A 35.0 ppb (32) N/A N/A 5.0 ppb (4) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 37.0
 
March 15, 2019, 4 a.m. 39.0 ppb (36) 6.0 ppb (6) N/A 33.0 ppb (31) N/A N/A 10.0 ppb (8) 0.3 ppb (3) N/A 5.7 μg/m3 (24) 36.0
 
March 15, 2019, 3 a.m. 27.0 ppb (25) 1.0 ppb (1) N/A 25.0 ppb (23) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 5.3 μg/m3 (22) 25.0
 
March 15, 2019, 2 a.m. 16.0 ppb (15) 1.0 ppb (1) N/A 15.0 ppb (14) N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 25.0
 
March 15, 2019, 1 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 1.6 μg/m3 (7) 34.0
 
March 15, 2019, midnight 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 46.0 ppb (35) 0.0 ppb (0) N/A 2.0 μg/m3 (8) 35.0
 
March 14, 2019, 11 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) 0.0 ppb (0) N/A 2.0 μg/m3 (8) 36.0
 
March 14, 2019, 10 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.0 ppb (0) N/A 2.2 μg/m3 (9) 38.0
 
March 14, 2019, 9 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) 0.0 ppb (0) N/A 2.7 μg/m3 (11) 39.0
 
March 14, 2019, 8 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.0 ppb (0) N/A 2.5 μg/m3 (10) 38.0
 
March 14, 2019, 7 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 38.0
 
March 14, 2019, 6 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.0 ppb (0) N/A 2.4 μg/m3 (10) 37.0
 
March 14, 2019, 5 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) 0.0 ppb (0) N/A 2.1 μg/m3 (9) 36.0
 
March 14, 2019, 4 p.m. 12.0 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 32.0
 
March 14, 2019, 3 p.m. 38.0 ppb (35) 17.0 ppb (16) N/A 20.0 ppb (19) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 4.7 μg/m3 (20) 35.0
 
March 14, 2019, 2 p.m. 79.0 ppb (77) 43.0 ppb (40) N/A 36.0 ppb (33) N/A N/A 7.0 ppb (5) 0.4 ppb (4) N/A 6.1 μg/m3 (25) 77.0
 
March 14, 2019, 1 p.m. 72.0 ppb (69) 31.0 ppb (29) N/A 41.0 ppb (38) N/A N/A 4.0 ppb (3) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 69.0
 
March 14, 2019, noon 50.0 ppb (46) 21.0 ppb (19) N/A 29.0 ppb (27) N/A N/A 19.0 ppb (15) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 46.0
 
March 14, 2019, 11 a.m. 25.0 ppb (23) 7.0 ppb (6) N/A 17.0 ppb (16) N/A N/A 25.0 ppb (19) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 23.0
 
March 14, 2019, 10 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A 24.0 ppb (18) 0.0 ppb (0) N/A 2.3 μg/m3 (10) 18.0
 
March 14, 2019, 9 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 30.0 ppb (23) 0.0 ppb (0) N/A 1.8 μg/m3 (8) 23.0
 
March 14, 2019, 8 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.0 ppb (0) N/A 1.3 μg/m3 (5) 30.0
 
March 14, 2019, 7 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.0 ppb (0) N/A 1.3 μg/m3 (5) 30.0
 
March 14, 2019, 6 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 38.0 ppb (29) 0.0 ppb (0) N/A 1.4 μg/m3 (6) 29.0
 
March 14, 2019, 5 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) 0.0 ppb (0) N/A 1.4 μg/m3 (6) 28.0
 
March 14, 2019, 4 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 39.0 ppb (30) 0.0 ppb (0) N/A 1.0 μg/m3 (4) 30.0
 
March 14, 2019, 3 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 40.0 ppb (31) 0.0 ppb (0) N/A 1.0 μg/m3 (4) 31.0
 
March 14, 2019, 2 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A 1.4 μg/m3 (6) 32.0
 
March 14, 2019, 1 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.0 ppb (0) N/A 1.2 μg/m3 (5) 32.0
 
March 14, 2019, midnight 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.0 ppb (0) N/A 1.0 μg/m3 (4) 33.0
 
March 13, 2019, 11 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 1.2 μg/m3 (5) 34.0
 
March 13, 2019, 10 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 1.0 μg/m3 (4) 34.0
 
March 13, 2019, 9 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 0.8 μg/m3 (3) 35.0
 
March 13, 2019, 8 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.0 ppb (0) N/A 0.8 μg/m3 (3) 35.0
 
March 13, 2019, 7 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 0.9 μg/m3 (4) 34.0
 
March 13, 2019, 6 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 0.9 μg/m3 (4) 34.0
 
March 13, 2019, 5 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 0.7 μg/m3 (3) 35.0
 
March 13, 2019, 4 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.0 ppb (0) N/A 0.7 μg/m3 (3) 33.0
 
March 13, 2019, 3 p.m. 15.0 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (9) N/A N/A 42.0 ppb (32) 0.0 ppb (0) N/A 0.9 μg/m3 (4) 32.0
 
March 13, 2019, 2 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 0.8 μg/m3 (3) 34.0
 
March 13, 2019, 1 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 0.7 μg/m3 (3) 35.0
 
March 13, 2019, noon 10.0 ppb (9) 5.0 ppb (5) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 0.7 μg/m3 (3) 34.0
 
March 13, 2019, 11 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.0 ppb (0) N/A 0.8 μg/m3 (3) 34.0
 
March 13, 2019, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.0 ppb (0) N/A 0.8 μg/m3 (3) 35.0
 
March 13, 2019, 9 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.0 ppb (0) N/A 0.6 μg/m3 (2) 32.0
 
March 13, 2019, 8 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.0 ppb (0) N/A 0.6 μg/m3 (2) 30.0
 
March 13, 2019, 7 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.0 ppb (0) N/A 1.4 μg/m3 (6) 30.0
 
March 12, 2019, 5 p.m. 17.0 ppb (16) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 9.3 μg/m3 (39) 39.0
 
March 12, 2019, 4 p.m. 25.0 ppb (23) 9.0 ppb (8) N/A 16.0 ppb (15) N/A N/A 39.0 ppb (30) 0.1 ppb (1) N/A 11.1 μg/m3 (46) 46.0
 
March 12, 2019, 3 p.m. 49.0 ppb (45) 20.0 ppb (19) N/A 29.0 ppb (27) N/A N/A 27.0 ppb (21) 0.4 ppb (4) N/A 11.5 μg/m3 (48) 48.0
 
March 12, 2019, 2 p.m. 106.0 ppb (101) 61.0 ppb (57) N/A 45.0 ppb (42) N/A N/A 6.0 ppb (5) 1.0 ppb (11) N/A 12.0 μg/m3 (50) 101.0
 
March 12, 2019, 1 p.m. 89.0 ppb (87) 44.0 ppb (41) N/A 45.0 ppb (42) N/A N/A 3.0 ppb (2) 0.8 ppb (9) N/A 10.6 μg/m3 (44) 87.0
 
March 12, 2019, noon 88.0 ppb (86) 45.0 ppb (42) N/A 43.0 ppb (40) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 13.0 μg/m3 (52) 86.0
 
March 12, 2019, 11 a.m. 56.0 ppb (52) 18.0 ppb (17) N/A 38.0 ppb (35) N/A N/A 3.0 ppb (2) 0.5 ppb (6) N/A 8.4 μg/m3 (35) 52.0
 
March 12, 2019, 10 a.m. 51.0 ppb (47) 15.0 ppb (14) N/A 35.0 ppb (32) N/A N/A 3.0 ppb (2) 0.4 ppb (4) N/A 7.1 μg/m3 (30) 47.0
 
March 12, 2019, 9 a.m. 37.0 ppb (34) 5.0 ppb (5) N/A 32.0 ppb (30) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 6.4 μg/m3 (27) 34.0
 
March 12, 2019, 8 a.m. 39.0 ppb (36) 5.0 ppb (5) N/A 34.0 ppb (31) N/A N/A 4.0 ppb (3) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 36.0
 
March 12, 2019, 7 a.m. 38.0 ppb (35) 4.0 ppb (4) N/A 33.0 ppb (31) N/A N/A 6.0 ppb (5) 0.3 ppb (3) N/A 8.9 μg/m3 (37) 37.0
 
March 12, 2019, 6 a.m. 42.0 ppb (39) 6.0 ppb (6) N/A 36.0 ppb (33) N/A N/A 5.0 ppb (4) 0.3 ppb (3) N/A 9.2 μg/m3 (38) 39.0
 
March 12, 2019, 5 a.m. 52.0 ppb (48) 11.0 ppb (10) N/A 40.0 ppb (37) N/A N/A 4.0 ppb (3) 0.4 ppb (4) N/A 13.8 μg/m3 (54) 54.0
 
March 12, 2019, 4 a.m. 45.0 ppb (42) 6.0 ppb (6) N/A 39.0 ppb (36) N/A N/A 6.0 ppb (5) 0.4 ppb (4) N/A 12.3 μg/m3 (51) 51.0
 
March 12, 2019, 3 a.m. 34.0 ppb (31) 2.0 ppb (2) N/A 32.0 ppb (30) N/A N/A 16.0 ppb (12) 0.3 ppb (3) N/A 11.3 μg/m3 (47) 47.0
 
March 12, 2019, 2 a.m. 23.0 ppb (21) 1.0 ppb (1) N/A 22.0 ppb (20) N/A N/A 34.0 ppb (26) 0.1 ppb (1) N/A 9.1 μg/m3 (38) 38.0
 
March 12, 2019, 1 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 47.0 ppb (36) 0.0 ppb (0) N/A 7.6 μg/m3 (32) 36.0