AQSQID: 380150003

Site Name: Bismarck Residential

Location: Bismarck, ND

Reporting: True, Located: True

Current AQI: 29.0

Bismarck ND, US: 46.8253, -100.7681

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 5 p.m. 2.2 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 4 p.m. 2.7 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
March 23, 2019, 3 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 27.0
 
March 23, 2019, 2 p.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 27.0
 
March 23, 2019, 1 p.m. 5.5 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (26) 0.2 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
March 23, 2019, noon 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
March 23, 2019, 11 a.m. 6.4 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 10 a.m. 7.9 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 23, 2019, 9 a.m. 5.2 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 27.0
 
March 23, 2019, 8 a.m. 4.3 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 28.0
 
March 23, 2019, 7 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 29.0
 
March 23, 2019, 6 a.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) N/A 1.9 μg/m3 (8) 30.0
 
March 23, 2019, 5 a.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) N/A 4.9 μg/m3 (20) 31.0
 
March 23, 2019, 4 a.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 31.0
 
March 23, 2019, 3 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) N/A 2.9 μg/m3 (12) 30.0
 
March 23, 2019, 2 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 2.0 μg/m3 (8) 31.0
 
March 23, 2019, 1 a.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 32.0
 
March 23, 2019, midnight 1.0 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 33.0
 
March 22, 2019, 11 p.m. 0.8 ppb (1) 0.4 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 34.0
 
March 22, 2019, 10 p.m. 0.6 ppb (1) 0.4 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 35.0
 
March 22, 2019, 9 p.m. 0.9 ppb (1) 0.5 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 35.0
 
March 22, 2019, 8 p.m. 1.4 ppb (1) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 35.0
 
March 22, 2019, 7 p.m. 0.9 ppb (1) 0.5 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 2.9 μg/m3 (12) 34.0
 
March 22, 2019, 6 p.m. 1.4 ppb (1) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 5.9 μg/m3 (25) 33.0
 
March 22, 2019, 5 p.m. 2.7 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 4 p.m. 4.8 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) N/A 7.0 μg/m3 (29) 30.0
 
March 22, 2019, 3 p.m. 6.2 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
March 22, 2019, 2 p.m. 12.5 ppb (12) 3.8 ppb (4) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 1 p.m. 21.6 ppb (20) 4.5 ppb (4) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 24.0 ppb (18) 0.22 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 22, 2019, noon 29.5 ppb (27) 5.6 ppb (5) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 16.0 ppb (12) 0.25 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
March 22, 2019, 11 a.m. 15.1 ppb (14) 0.3 ppb (0) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 27.0 ppb (21) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 10 a.m. 8.4 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) 0.17 ppb (2) N/A 11.9 μg/m3 (50) 50.0
 
March 22, 2019, 9 a.m. 5.1 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 22, 2019, 8 a.m. 7.5 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 7 a.m. 6.5 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.19 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
March 22, 2019, 6 a.m. 4.7 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
March 22, 2019, 5 a.m. 5.4 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 4 a.m. 5.5 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 22, 2019, 3 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.16 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 22, 2019, 2 a.m. 4.9 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 22, 2019, 1 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) 0.2 ppb (2) N/A 6.1 μg/m3 (25) 32.0
 
March 22, 2019, midnight 5.7 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.19 ppb (2) N/A 6.9 μg/m3 (29) 34.0
 
March 21, 2019, 11 p.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.18 ppb (2) N/A 8.9 μg/m3 (37) 38.0
 
March 21, 2019, 10 p.m. 3.0 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.18 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
March 21, 2019, 9 p.m. 2.9 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 54.0 ppb (42) 0.18 ppb (2) N/A 8.0 μg/m3 (33) 42.0
 
March 21, 2019, 8 p.m. 3.4 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 54.0 ppb (42) 0.19 ppb (2) N/A 9.9 μg/m3 (41) 42.0
 
March 21, 2019, 7 p.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 50.0 ppb (38) 0.2 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 21, 2019, 6 p.m. 5.0 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 46.0 ppb (35) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 5 p.m. 5.9 ppb (5) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 41.0 ppb (32) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
March 21, 2019, 4 p.m. 6.2 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
March 21, 2019, 3 p.m. 9.2 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.22 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 21, 2019, 2 p.m. 24.6 ppb (23) 9.0 ppb (8) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 23.0 ppb (18) 0.33 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 1 p.m. 37.2 ppb (34) 10.5 ppb (10) N/A 27.0 ppb (25) N/A 2.0 ppb (3) 14.0 ppb (11) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 34.0
 
March 21, 2019, noon 14.3 ppb (13) 0.7 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 25.0 ppb (19) 0.24 ppb (3) N/A 8.9 μg/m3 (37) 37.0
 
March 21, 2019, 11 a.m. 12.8 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 24.0 ppb (18) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 10 a.m. 8.3 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (24) 0.23 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
March 21, 2019, 9 a.m. 6.8 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.22 ppb (2) N/A 14.9 μg/m3 (56) 56.0
 
March 21, 2019, 8 a.m. 8.4 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (27) 0.23 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
March 21, 2019, 7 a.m. 9.7 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 35.0 ppb (27) 0.25 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
March 21, 2019, 6 a.m. 12.8 ppb (12) 0.6 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 35.0 ppb (27) 0.27 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
March 21, 2019, 5 a.m. 16.0 ppb (15) 0.6 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 32.0 ppb (25) 0.32 ppb (4) N/A 18.9 μg/m3 (65) 65.0
 
March 21, 2019, 4 a.m. 23.5 ppb (22) 1.1 ppb (1) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 26.0 ppb (20) 0.39 ppb (4) N/A 20.9 μg/m3 (69) 69.0
 
March 21, 2019, 3 a.m. 22.7 ppb (21) 0.5 ppb (0) N/A 22.0 ppb (20) N/A 1.0 ppb (1) 26.0 ppb (20) 0.38 ppb (4) N/A 11.1 μg/m3 (46) 46.0
 
March 21, 2019, 2 a.m. 14.0 ppb (13) 0.4 ppb (0) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 38.0 ppb (29) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 21, 2019, 1 a.m. 12.2 ppb (11) 0.2 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 40.0 ppb (31) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, midnight 4.0 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 48.0 ppb (37) 0.2 ppb (2) N/A 8.0 μg/m3 (33) 37.0
 
March 20, 2019, 11 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
March 20, 2019, 10 p.m. 3.3 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 38.0
 
March 20, 2019, 9 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 50.0 ppb (38) 0.18 ppb (2) N/A 4.9 μg/m3 (20) 38.0
 
March 20, 2019, 8 p.m. 4.3 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 48.0 ppb (37) 0.19 ppb (2) N/A 7.9 μg/m3 (33) 37.0
 
March 20, 2019, 7 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
March 20, 2019, 6 p.m. 4.1 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) N/A 7.9 μg/m3 (33) 35.0
 
March 20, 2019, 5 p.m. 4.2 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.19 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 20, 2019, 4 p.m. 4.3 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 3 p.m. 4.7 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) N/A 11.9 μg/m3 (50) 50.0
 
March 20, 2019, 2 p.m. 4.5 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.2 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
March 20, 2019, 1 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, noon 7.7 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 11 a.m. 6.8 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 35.0 ppb (27) 0.2 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 20, 2019, 10 a.m. 3.5 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 9 a.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 30.0
 
March 20, 2019, 8 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.18 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
March 20, 2019, 7 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.18 ppb (2) N/A 4.9 μg/m3 (20) 29.0
 
March 20, 2019, 6 a.m. 4.3 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 38.0 ppb (29) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 29.0
 
March 20, 2019, 5 a.m. 6.9 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 26.0
 
March 20, 2019, 4 a.m. 3.6 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 5.9 μg/m3 (25) 28.0
 
March 20, 2019, 3 a.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) N/A 3.9 μg/m3 (16) 30.0
 
March 20, 2019, 2 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 1.0 μg/m3 (4) 30.0
 
March 20, 2019, 1 a.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 30.0
 
March 20, 2019, midnight 3.4 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) N/A 3.9 μg/m3 (16) 32.0
 
March 19, 2019, 11 p.m. 3.5 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 19, 2019, 10 p.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
March 19, 2019, 9 p.m. 4.9 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 35.0
 
March 19, 2019, 8 p.m. 5.6 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 47.0 ppb (36) 0.18 ppb (2) N/A N/A 36.0
 
March 19, 2019, 7 p.m. 17.0 ppb (16) 6.4 ppb (6) N/A 11.0 ppb (10) N/A 6.0 ppb (9) N/A 0.18 ppb (2) N/A N/A 16.0
 
March 19, 2019, 6 p.m. 23.8 ppb (22) 9.8 ppb (9) N/A 14.0 ppb (13) N/A 8.0 ppb (11) N/A 0.19 ppb (2) N/A N/A 22.0
 
March 19, 2019, 5 p.m. 12.7 ppb (12) 4.3 ppb (4) N/A 8.0 ppb (7) N/A 2.0 ppb (3) 36.0 ppb (28) 0.2 ppb (2) N/A 19.0 μg/m3 (65) 65.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A 8.0 ppb (11) 32.0 ppb (25) 0.2 ppb (2) N/A 45.8 μg/m3 (126) 126.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
March 19, 2019, 2 p.m. 9.7 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 1 p.m. 9.6 ppb (9) 1.3 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 30.0 ppb (23) 0.23 ppb (3) N/A 12.1 μg/m3 (50) 50.0
 
March 19, 2019, noon 9.2 ppb (9) 0.6 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 30.0 ppb (23) 0.23 ppb (3) N/A 13.9 μg/m3 (54) 54.0
 
March 19, 2019, 11 a.m. 7.6 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.21 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 19, 2019, 10 a.m. 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) 0.18 ppb (2) N/A 18.8 μg/m3 (64) 64.0
 
March 19, 2019, 9 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 15.1 μg/m3 (57) 57.0
 
March 19, 2019, 8 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.18 ppb (2) N/A 7.2 μg/m3 (30) 30.0
 
March 19, 2019, 7 a.m. 4.0 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
March 19, 2019, 6 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 19, 2019, 5 a.m. 4.1 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 27.0
 
March 19, 2019, 4 a.m. 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 3.9 μg/m3 (16) 28.0
 
March 19, 2019, 3 a.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) N/A 4.9 μg/m3 (20) 31.0
 
March 19, 2019, 2 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 19, 2019, 1 a.m. 9.5 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 30.0
 
March 19, 2019, midnight 5.5 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 18, 2019, 11 p.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.19 ppb (2) N/A 3.9 μg/m3 (16) 36.0
 
March 18, 2019, 10 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 37.0
 
March 18, 2019, 9 p.m. 2.2 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
March 18, 2019, 8 p.m. 2.2 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 38.0
 
March 18, 2019, 7 p.m. 2.1 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 37.0
 
March 18, 2019, 6 p.m. 1.9 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 37.0
 
March 18, 2019, 5 p.m. 1.7 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.18 ppb (2) N/A 3.9 μg/m3 (16) 36.0
 
March 18, 2019, 4 p.m. 1.8 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) N/A 5.9 μg/m3 (25) 35.0
 
March 18, 2019, 3 p.m. 6.2 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) 0.22 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
March 18, 2019, 2 p.m. 18.7 ppb (17) 4.8 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 35.0 ppb (27) 0.33 ppb (4) N/A 10.9 μg/m3 (45) 45.0
 
March 18, 2019, 1 p.m. 24.7 ppb (23) 3.8 ppb (4) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 27.0 ppb (21) 0.4 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
March 18, 2019, noon 20.1 ppb (19) 1.2 ppb (1) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 28.0 ppb (22) 0.36 ppb (4) N/A 5.1 μg/m3 (21) 22.0
 
March 18, 2019, 11 a.m. 19.0 ppb (18) 1.3 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 28.0 ppb (22) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 22.0
 
March 18, 2019, 10 a.m. 12.0 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 34.0 ppb (26) 0.24 ppb (3) N/A 5.9 μg/m3 (25) 26.0
 
March 18, 2019, 9 a.m. 8.6 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 18, 2019, 8 a.m. 10.5 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 34.0 ppb (26) 0.22 ppb (2) N/A 6.1 μg/m3 (25) 26.0
 
March 18, 2019, 7 a.m. 6.9 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
March 18, 2019, 6 a.m. 12.7 ppb (12) 0.3 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
March 18, 2019, 5 a.m. 18.0 ppb (17) 0.8 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 32.0 ppb (25) 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 4 a.m. 14.0 ppb (13) 0.2 ppb (0) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 37.0 ppb (28) 0.23 ppb (3) N/A 11.9 μg/m3 (50) 50.0
 
March 18, 2019, 3 a.m. 16.7 ppb (15) 0.4 ppb (0) N/A 16.0 ppb (15) N/A 4.0 ppb (6) 35.0 ppb (27) 0.24 ppb (3) N/A 7.1 μg/m3 (30) 30.0
 
March 18, 2019, 2 a.m. 18.7 ppb (17) 0.3 ppb (0) N/A 18.0 ppb (17) N/A 8.0 ppb (11) 34.0 ppb (26) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 1 a.m. 10.3 ppb (10) 0.2 ppb (0) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 42.0 ppb (32) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 32.0
 
March 18, 2019, midnight 5.2 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 48.0 ppb (37) 0.2 ppb (2) N/A 6.9 μg/m3 (29) 37.0
 
March 17, 2019, 11 p.m. 4.7 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 50.0 ppb (38) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
March 17, 2019, 10 p.m. 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 53.0 ppb (41) 0.18 ppb (2) N/A 7.9 μg/m3 (33) 41.0
 
March 17, 2019, 9 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 55.0 ppb (42) 0.19 ppb (2) N/A 11.9 μg/m3 (50) 50.0
 
March 17, 2019, 8 p.m. 3.9 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 55.0 ppb (42) 0.19 ppb (2) N/A 6.1 μg/m3 (25) 42.0
 
March 17, 2019, 7 p.m. 3.7 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 53.0 ppb (41) 0.19 ppb (2) N/A 8.9 μg/m3 (37) 41.0
 
March 17, 2019, 6 p.m. 3.5 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 50.0 ppb (38) 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 5 p.m. 3.9 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 48.0 ppb (37) 0.19 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 17, 2019, 4 p.m. 4.7 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 44.0 ppb (34) 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 3 p.m. 5.8 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 42.0 ppb (32) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 32.0
 
March 17, 2019, 2 p.m. 6.3 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) N/A 6.9 μg/m3 (29) 32.0
 
March 17, 2019, 1 p.m. 10.2 ppb (9) 1.3 ppb (1) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 38.0 ppb (29) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, noon 5.1 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 42.0 ppb (32) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 32.0
 
March 17, 2019, 11 a.m. 8.7 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 39.0 ppb (30) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 30.0
 
March 17, 2019, 10 a.m. 8.9 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 39.0 ppb (30) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 30.0
 
March 17, 2019, 9 a.m. 7.4 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
March 17, 2019, 8 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 17, 2019, 7 a.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) N/A 3.9 μg/m3 (16) 33.0
 
March 17, 2019, 6 a.m. 9.5 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (29) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 29.0
 
March 17, 2019, 5 a.m. 7.8 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (30) 0.2 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
March 17, 2019, 4 a.m. 10.4 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 37.0 ppb (28) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 3 a.m. 9.4 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 40.0 ppb (31) 0.23 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
March 17, 2019, 2 a.m. 8.9 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 1 a.m. 6.0 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 48.0 ppb (37) 0.21 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 17, 2019, midnight 5.3 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 49.0 ppb (38) 0.2 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 16, 2019, 11 p.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 48.0 ppb (37) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 10 p.m. 4.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.19 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 16, 2019, 9 p.m. 4.5 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 46.0 ppb (35) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 8 p.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 16, 2019, 7 p.m. 7.2 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 44.0 ppb (34) 0.17 ppb (2) N/A 15.9 μg/m3 (58) 58.0
 
March 16, 2019, 6 p.m. 10.8 ppb (10) 2.9 ppb (3) N/A 8.0 ppb (7) N/A 2.0 ppb (3) 38.0 ppb (29) 0.19 ppb (2) N/A 13.0 μg/m3 (52) 52.0