AQSQID: 380150003

Site Name: Bismarck Residential

Location: Bismarck, ND

Reporting: True, Located: True

Current AQI: 25.0

Bismarck ND, US: 46.8253, -100.7681

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 22, 2019, noon 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 25.0
 
May 22, 2019, 11 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 28.0
 
May 22, 2019, 10 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 1.9 μg/m3 (8) 31.0
 
May 22, 2019, 9 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 25.0
 
May 22, 2019, 8 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 23.0
 
May 22, 2019, 7 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) 0.12 ppb (1) N/A 1.9 μg/m3 (8) 22.0
 
May 22, 2019, 6 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.12 ppb (1) N/A 3.9 μg/m3 (16) 23.0
 
May 22, 2019, 5 a.m. 2.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 22.0
 
May 22, 2019, 4 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.12 ppb (1) N/A 3.9 μg/m3 (16) 23.0
 
May 22, 2019, 3 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) N/A 4.9 μg/m3 (20) 25.0
 
May 22, 2019, 2 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 1.0 μg/m3 (4) 27.0
 
May 22, 2019, 1 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 28.0
 
May 22, 2019, midnight 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) N/A -0.9 μg/m3 (0) 29.0
 
May 21, 2019, 11 p.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 0.9 μg/m3 (4) 31.0
 
May 21, 2019, 10 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) N/A 2.9 μg/m3 (12) 31.0
 
May 21, 2019, 9 p.m. 2.4 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 2.0 μg/m3 (8) 28.0
 
May 21, 2019, 8 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 2.0 μg/m3 (8) 26.0
 
May 21, 2019, 7 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 25.0
 
May 21, 2019, 6 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) N/A 1.9 μg/m3 (8) 25.0
 
May 21, 2019, 5 p.m. 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 25.0
 
May 21, 2019, 4 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 25.0
 
May 21, 2019, 3 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 23.0
 
May 21, 2019, 2 p.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 18.0
 
May 21, 2019, 1 p.m. 5.1 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (15) 0.13 ppb (1) N/A 1.9 μg/m3 (8) 15.0
 
May 21, 2019, noon 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 15.0
 
May 21, 2019, 11 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (16) 0.12 ppb (1) N/A 2.0 μg/m3 (8) 16.0
 
May 21, 2019, 10 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 18.0
 
May 21, 2019, 9 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (18) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 18.0
 
May 21, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.12 ppb (1) N/A 1.0 μg/m3 (4) 15.0
 
May 21, 2019, 7 a.m. 5.4 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (15) 0.14 ppb (2) N/A 1.9 μg/m3 (8) 15.0
 
May 21, 2019, 6 a.m. 6.5 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (15) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 15.0
 
May 21, 2019, 5 a.m. 8.2 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 15.0
 
May 21, 2019, 4 a.m. 4.4 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 26.0 ppb (20) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 20.0
 
May 21, 2019, 3 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.15 ppb (2) N/A 3.9 μg/m3 (16) 22.0
 
May 21, 2019, 2 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 3.0 μg/m3 (12) 24.0
 
May 21, 2019, 1 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 27.0
 
May 21, 2019, midnight 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) N/A 1.9 μg/m3 (8) 29.0
 
May 20, 2019, 11 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) N/A 14.7 μg/m3 (56) 56.0
 
May 20, 2019, 10 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) N/A 3.2 μg/m3 (13) 31.0
 
May 20, 2019, 9 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 32.0
 
May 20, 2019, 8 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.13 ppb (1) N/A 0.9 μg/m3 (4) 29.0
 
May 20, 2019, 7 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) N/A 2.9 μg/m3 (12) 28.0
 
May 20, 2019, 6 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 2.0 μg/m3 (8) 28.0
 
May 20, 2019, 5 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) N/A 0.0 μg/m3 (0) 27.0
 
May 20, 2019, 4 p.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) N/A 0.9 μg/m3 (4) 27.0
 
May 20, 2019, 3 p.m. 6.3 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 29.0 ppb (22) 0.14 ppb (2) N/A 4.9 μg/m3 (20) 22.0
 
May 20, 2019, 2 p.m. 20.5 ppb (19) 9.0 ppb (8) N/A 12.0 ppb (11) N/A 1.0 ppb (1) 17.0 ppb (13) 0.24 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
May 20, 2019, 1 p.m. 45.2 ppb (42) 26.2 ppb (24) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 5.0 ppb (4) 0.51 ppb (6) N/A 4.0 μg/m3 (17) 42.0
 
May 20, 2019, noon 54.6 ppb (51) 36.8 ppb (34) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 3.0 ppb (2) 0.64 ppb (7) N/A 4.0 μg/m3 (17) 51.0
 
May 20, 2019, 11 a.m. 22.3 ppb (21) 7.7 ppb (7) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 8.0 ppb (6) 0.29 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
May 20, 2019, 10 a.m. 11.6 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 11.0 ppb (8) 0.19 ppb (2) N/A 3.9 μg/m3 (16) 16.0
 
May 20, 2019, 9 a.m. 8.1 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.17 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
May 20, 2019, 8 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 17.0 ppb (13) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
May 20, 2019, 7 a.m. 4.7 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (14) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 14.0
 
May 20, 2019, 6 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (15) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 15.0
 
May 20, 2019, 5 a.m. 6.2 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 17.0 ppb (13) 0.16 ppb (2) N/A 0.9 μg/m3 (4) 13.0
 
May 20, 2019, 4 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (15) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 15.0
 
May 20, 2019, 3 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 15.0
 
May 20, 2019, 2 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 1.0 μg/m3 (4) 17.0
 
May 20, 2019, 1 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 18.0
 
May 20, 2019, midnight 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A -1.9 μg/m3 (0) 19.0
 
May 19, 2019, 11 p.m. 1.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A -2.0 μg/m3 (0) 21.0
 
May 19, 2019, 10 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A -2.0 μg/m3 (0) 21.0
 
May 19, 2019, 9 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 21.0
 
May 19, 2019, 8 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A 1.9 μg/m3 (8) 21.0
 
May 19, 2019, 7 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 20.0
 
May 19, 2019, 6 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 19.0
 
May 19, 2019, 5 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) 0.13 ppb (1) N/A 0.9 μg/m3 (4) 18.0
 
May 19, 2019, 4 p.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (16) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 16.0
 
May 19, 2019, 3 p.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 15.0
 
May 19, 2019, 2 p.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) 0.13 ppb (1) N/A 0.9 μg/m3 (4) 15.0
 
May 19, 2019, 1 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.13 ppb (1) N/A 3.9 μg/m3 (16) 16.0
 
May 19, 2019, noon 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) 0.13 ppb (1) N/A 6.9 μg/m3 (29) 29.0
 
May 19, 2019, 11 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 18.0
 
May 19, 2019, 10 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.13 ppb (1) N/A 2.0 μg/m3 (8) 18.0
 
May 19, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) 0.13 ppb (1) N/A 2.0 μg/m3 (8) 19.0
 
May 19, 2019, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 19.0
 
May 19, 2019, 7 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) 0.13 ppb (1) N/A 0.9 μg/m3 (4) 19.0
 
May 19, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 21.0
 
May 19, 2019, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 22.0
 
May 19, 2019, 4 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.13 ppb (1) N/A -0.9 μg/m3 (0) 20.0
 
May 19, 2019, 3 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) 0.13 ppb (1) N/A 0.9 μg/m3 (4) 18.0
 
May 19, 2019, 2 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 2.9 μg/m3 (12) 20.0
 
May 19, 2019, 1 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.11 ppb (1) N/A 3.0 μg/m3 (12) 21.0
 
May 19, 2019, midnight 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.12 ppb (1) N/A 3.9 μg/m3 (16) 19.0
 
May 18, 2019, 11 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.12 ppb (1) N/A 4.0 μg/m3 (17) 19.0
 
May 18, 2019, 10 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.12 ppb (1) N/A 3.0 μg/m3 (12) 19.0
 
May 18, 2019, 9 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.12 ppb (1) N/A 3.9 μg/m3 (16) 20.0
 
May 18, 2019, 8 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) 0.12 ppb (1) N/A 3.0 μg/m3 (12) 18.0
 
May 18, 2019, 7 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) 0.12 ppb (1) N/A 3.9 μg/m3 (16) 17.0
 
May 18, 2019, 6 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) 0.12 ppb (1) N/A 5.9 μg/m3 (25) 25.0
 
May 18, 2019, 5 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
May 18, 2019, 4 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.12 ppb (1) N/A 7.9 μg/m3 (33) 33.0
 
May 18, 2019, 3 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.12 ppb (1) N/A 8.9 μg/m3 (37) 37.0
 
May 18, 2019, 2 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) 0.12 ppb (1) N/A 2.2 μg/m3 (9) 23.0
 
May 18, 2019, 1 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 20.0
 
May 18, 2019, noon 1.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.11 ppb (1) N/A 3.9 μg/m3 (16) 20.0
 
May 18, 2019, 11 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) 0.11 ppb (1) N/A 2.0 μg/m3 (8) 20.0
 
May 18, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) 0.11 ppb (1) N/A 2.9 μg/m3 (12) 22.0
 
May 18, 2019, 9 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.11 ppb (1) N/A 3.0 μg/m3 (12) 25.0
 
May 18, 2019, 8 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.11 ppb (1) N/A 3.9 μg/m3 (16) 24.0
 
May 18, 2019, 7 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) 0.11 ppb (1) N/A 4.9 μg/m3 (20) 25.0
 
May 18, 2019, 6 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 25.0
 
May 18, 2019, 5 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.12 ppb (1) N/A 3.0 μg/m3 (12) 20.0
 
May 18, 2019, 4 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) 0.11 ppb (1) N/A 3.0 μg/m3 (12) 18.0
 
May 18, 2019, 3 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.11 ppb (1) N/A 5.8 μg/m3 (24) 24.0
 
May 18, 2019, 2 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 18, 2019, 1 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 6.1 μg/m3 (25) 25.0
 
May 18, 2019, midnight 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
May 17, 2019, 11 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 24.0
 
May 17, 2019, 10 p.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 4.9 μg/m3 (20) 22.0
 
May 17, 2019, 9 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 25.0
 
May 17, 2019, 8 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 24.0
 
May 17, 2019, 7 p.m. 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 22.0
 
May 17, 2019, 6 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A -1.9 μg/m3 (0) 19.0
 
May 17, 2019, 5 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 18.0
 
May 17, 2019, 4 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 18.0
 
May 17, 2019, 3 p.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A -0.9 μg/m3 (0) 19.0
 
May 17, 2019, 2 p.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) N/A -1.0 μg/m3 (0) 21.0
 
May 17, 2019, 1 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 0.9 μg/m3 (4) 20.0
 
May 17, 2019, noon 4.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (18) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 18.0
 
May 17, 2019, 11 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 19.0
 
May 17, 2019, 10 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 20.0
 
May 17, 2019, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 20.0
 
May 17, 2019, 8 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 20.0
 
May 17, 2019, 7 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 20.0
 
May 17, 2019, 6 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.13 ppb (1) N/A 2.8 μg/m3 (12) 21.0
 
May 17, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) N/A 3.9 μg/m3 (16) 23.0
 
May 17, 2019, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 26.0
 
May 17, 2019, 3 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 29.0
 
May 17, 2019, 2 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 5.9 μg/m3 (25) 29.0
 
May 17, 2019, 1 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 3.1 μg/m3 (13) 33.0
 
May 17, 2019, midnight 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 31.0
 
May 16, 2019, 11 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
May 16, 2019, 10 p.m. 1.7 ppb (2) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 29.0
 
May 16, 2019, 9 p.m. 1.7 ppb (2) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 28.0
 
May 16, 2019, 8 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A 3.9 μg/m3 (16) 27.0
 
May 16, 2019, 7 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 26.0
 
May 16, 2019, 6 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 25.0
 
May 16, 2019, 5 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A -0.8 μg/m3 (0) 23.0
 
May 16, 2019, 4 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A 0.9 μg/m3 (4) 21.0
 
May 16, 2019, 3 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
May 16, 2019, 2 p.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.15 ppb (2) N/A 7.8 μg/m3 (32) 32.0
 
May 16, 2019, 1 p.m. 6.7 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
May 16, 2019, noon 3.5 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) N/A 6.1 μg/m3 (25) 25.0
 
May 16, 2019, 11 a.m. 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 19.0 ppb (15) 0.17 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
May 16, 2019, 10 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) 0.15 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
May 16, 2019, 9 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) 0.15 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 16, 2019, 8 a.m. 4.3 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) 0.15 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 16, 2019, 7 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2019, 6 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 33.0 ppb (25) 0.14 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2019, 5 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 32.0 ppb (25) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2019, 4 a.m. 10.1 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
May 16, 2019, 3 a.m. 10.5 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 34.0 ppb (26) 0.19 ppb (2) N/A 3.1 μg/m3 (13) 26.0
 
May 16, 2019, 2 a.m. 5.8 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 5.8 μg/m3 (24) 31.0
 
May 16, 2019, 1 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
May 16, 2019, midnight 2.6 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 33.0
 
May 15, 2019, 11 p.m. 3.4 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) N/A 6.8 μg/m3 (28) 30.0
 
May 15, 2019, 10 p.m. 3.2 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
May 15, 2019, 9 p.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) N/A 16.7 μg/m3 (60) 60.0
 
May 15, 2019, 8 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
May 15, 2019, 7 p.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 16.8 μg/m3 (60) 60.0
 
May 15, 2019, 6 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 28.5 μg/m3 (85) 85.0
 
May 15, 2019, 5 p.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.16 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
May 15, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
May 15, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) N/A N/A 32.0
 
May 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A N/A 29.0
 
May 15, 2019, 1 p.m. 4.3 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A N/A 25.0