AQSQID: 381010003

Site Name: Ryder

Location: Maryfield, ND

Reporting: True, Located: True

Current AQI: 22.0

Maryfield ND, US: 49.940861, -101.571583

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 19, 2019, 4 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (18) 22.0
 
May 19, 2019, 3 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 2.0 μg/m3 (2) 3.8 μg/m3 (16) 20.0
 
May 19, 2019, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 4.0 μg/m3 (4) 1.3 μg/m3 (5) 17.0
 
May 19, 2019, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 4.0 μg/m3 (4) -1.3 μg/m3 (0) 15.0
 
May 19, 2019, noon 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 4.0 μg/m3 (4) -0.4 μg/m3 (0) 15.0
 
May 19, 2019, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 18.0 ppb (14) N/A 6.0 μg/m3 (5) 0.5 μg/m3 (2) 14.0
 
May 19, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 5.0 μg/m3 (5) -1.4 μg/m3 (0) 15.0
 
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) 19.0 ppb (15) N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 15.0
 
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) 19.0 ppb (15) N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 15.0
 
May 19, 2019, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 6.0 μg/m3 (5) -0.7 μg/m3 (0) 15.0
 
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) 23.0 ppb (18) N/A 6.0 μg/m3 (5) 0.2 μg/m3 (1) 18.0
 
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) 22.0 ppb (17) N/A 7.0 μg/m3 (6) -0.3 μg/m3 (0) 17.0
 
May 19, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 9.0 μg/m3 (8) -0.3 μg/m3 (0) 18.0
 
May 19, 2019, 3 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) N/A 10.0 μg/m3 (9) 0.7 μg/m3 (3) 19.0
 
May 19, 2019, 2 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) N/A 10.0 μg/m3 (9) 1.8 μg/m3 (8) 22.0
 
May 19, 2019, 1 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) N/A 9.0 μg/m3 (8) 0.9 μg/m3 (4) 22.0
 
May 19, 2019, midnight 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 10.0 μg/m3 (9) 0.8 μg/m3 (3) 25.0
 
May 18, 2019, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 25.0
 
May 18, 2019, 10 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 10.0 μg/m3 (9) 3.3 μg/m3 (14) 25.0
 
May 18, 2019, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 11.0 μg/m3 (10) 0.7 μg/m3 (3) 25.0
 
May 18, 2019, 8 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 12.0 μg/m3 (11) 1.5 μg/m3 (6) 24.0
 
May 18, 2019, 7 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 11.0 μg/m3 (10) 0.2 μg/m3 (1) 23.0
 
May 18, 2019, 6 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 13.0 μg/m3 (12) 0.1 μg/m3 (0) 22.0
 
May 18, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 10.0 μg/m3 (9) 1.5 μg/m3 (6) 20.0
 
May 18, 2019, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 6.0 μg/m3 (5) 1.3 μg/m3 (5) 18.0
 
May 18, 2019, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 18.0
 
May 18, 2019, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 5.0 μg/m3 (5) 2.1 μg/m3 (9) 16.0
 
May 18, 2019, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 17.0
 
May 18, 2019, noon 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 17.0
 
May 18, 2019, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 18.0
 
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) 25.0 ppb (19) N/A 6.0 μg/m3 (5) 0.4 μg/m3 (2) 19.0
 
May 18, 2019, 9 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) N/A 5.0 μg/m3 (5) 0.7 μg/m3 (3) 22.0
 
May 18, 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) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 19.0
 
May 18, 2019, 7 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) N/A 4.0 μg/m3 (4) 4.9 μg/m3 (20) 21.0
 
May 18, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 5.0 μg/m3 (5) 5.6 μg/m3 (23) 23.0
 
May 18, 2019, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 7.0 μg/m3 (6) 0.9 μg/m3 (4) 25.0
 
May 18, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 7.0 μg/m3 (6) -0.9 μg/m3 (0) 23.0
 
May 18, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 8.0 μg/m3 (7) 2.2 μg/m3 (9) 18.0
 
May 18, 2019, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 9.0 μg/m3 (8) 3.9 μg/m3 (16) 18.0
 
May 18, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 12.0 μg/m3 (11) 1.8 μg/m3 (8) 20.0
 
May 18, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 11.0 μg/m3 (10) 0.7 μg/m3 (3) 22.0
 
May 17, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 8.0 μg/m3 (7) 0.0 μg/m3 (0) 25.0
 
May 17, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 9.0 μg/m3 (8) 0.2 μg/m3 (1) 26.0
 
May 17, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 5.0 μg/m3 (5) 1.7 μg/m3 (7) 28.0
 
May 17, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 27.0
 
May 17, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 3.0 μg/m3 (3) 1.7 μg/m3 (7) 25.0
 
May 17, 2019, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 3.0 μg/m3 (3) 3.5 μg/m3 (15) 22.0
 
May 17, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 22.0
 
May 17, 2019, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 5.0 μg/m3 (5) -2.0 μg/m3 (0) 20.0
 
May 17, 2019, 3 p.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) N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 19.0
 
May 17, 2019, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 20.0
 
May 17, 2019, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 20.0
 
May 17, 2019, noon 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 5.0 μg/m3 (5) 4.4 μg/m3 (18) 19.0
 
May 17, 2019, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 8.0 μg/m3 (7) 2.8 μg/m3 (12) 20.0
 
May 17, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 7.0 μg/m3 (6) 1.2 μg/m3 (5) 21.0
 
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) 25.0 ppb (19) N/A 6.0 μg/m3 (5) 0.3 μg/m3 (1) 19.0
 
May 17, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 7.0 μg/m3 (6) 0.5 μg/m3 (2) 19.0
 
May 17, 2019, 7 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) N/A 7.0 μg/m3 (6) 0.6 μg/m3 (2) 20.0
 
May 17, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 22.0
 
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) 28.0 ppb (22) N/A 6.0 μg/m3 (5) 3.1 μg/m3 (13) 22.0
 
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) 26.0 ppb (20) N/A 11.0 μg/m3 (10) 3.2 μg/m3 (13) 20.0
 
May 17, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 17.0 μg/m3 (15) 2.9 μg/m3 (12) 22.0
 
May 17, 2019, 2 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) N/A 12.0 μg/m3 (11) 2.4 μg/m3 (10) 26.0
 
May 17, 2019, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 11.0 μg/m3 (10) 3.0 μg/m3 (12) 31.0
 
May 17, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 9.0 μg/m3 (8) 3.6 μg/m3 (15) 31.0
 
May 16, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 9.0 μg/m3 (8) 2.6 μg/m3 (11) 33.0
 
May 16, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 33.0
 
May 16, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 8.0 μg/m3 (7) 2.4 μg/m3 (10) 32.0
 
May 16, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 7.0 μg/m3 (6) 3.4 μg/m3 (14) 32.0
 
May 16, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 7.0 μg/m3 (6) 4.9 μg/m3 (20) 29.0
 
May 16, 2019, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (11) 28.0
 
May 16, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 5.0 μg/m3 (5) 2.9 μg/m3 (12) 27.0
 
May 16, 2019, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 2.3 μg/m3 (10) 25.0
 
May 16, 2019, 3 p.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) N/A 4.0 μg/m3 (4) 2.2 μg/m3 (9) 22.0
 
May 16, 2019, 2 p.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) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 22.0
 
May 16, 2019, 1 p.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) N/A 3.0 μg/m3 (3) -0.4 μg/m3 (0) 22.0
 
May 16, 2019, noon 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 5.0 μg/m3 (5) -0.3 μg/m3 (0) 22.0
 
May 16, 2019, 11 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) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 22.0
 
May 16, 2019, 10 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) N/A 4.0 μg/m3 (4) 3.9 μg/m3 (16) 22.0
 
May 16, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 5.0 μg/m3 (5) 3.5 μg/m3 (15) 20.0
 
May 16, 2019, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 8.0 μg/m3 (7) 6.4 μg/m3 (27) 27.0
 
May 16, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 6.0 μg/m3 (5) 12.1 μg/m3 (50) 50.0
 
May 16, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 16.0 μg/m3 (15) N/A 16.0
 
May 16, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 20.0 μg/m3 (18) N/A 21.0
 
May 16, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 10.0 μg/m3 (9) N/A 24.0
 
May 16, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 25.0 μg/m3 (23) 3.2 μg/m3 (13) 26.0
 
May 16, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 9.0 μg/m3 (8) 3.3 μg/m3 (14) 28.0
 
May 16, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 12.0 μg/m3 (11) 5.8 μg/m3 (24) 31.0
 
May 16, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 12.0 μg/m3 (11) 6.9 μg/m3 (29) 33.0
 
May 15, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 10.0 μg/m3 (9) 7.3 μg/m3 (30) 34.0
 
May 15, 2019, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 34.0
 
May 15, 2019, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 14.0 μg/m3 (13) 6.4 μg/m3 (27) 32.0
 
May 15, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 16.0 μg/m3 (15) 4.7 μg/m3 (20) 32.0
 
May 15, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 12.0 μg/m3 (11) 6.1 μg/m3 (25) 31.0
 
May 15, 2019, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 15.0 μg/m3 (14) 8.3 μg/m3 (35) 35.0
 
May 15, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 21.0 μg/m3 (19) 9.5 μg/m3 (40) 40.0
 
May 15, 2019, 4 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 22.0 μg/m3 (20) 9.5 μg/m3 (40) 40.0
 
May 15, 2019, 3 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 22.0 μg/m3 (20) 7.6 μg/m3 (32) 32.0
 
May 15, 2019, 2 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 19.0 μg/m3 (17) 6.1 μg/m3 (25) 25.0
 
May 15, 2019, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 27.0
 
May 15, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 11.0 μg/m3 (10) 4.4 μg/m3 (18) 18.0
 
May 15, 2019, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 12.0 μg/m3 (11) 4.1 μg/m3 (17) 17.0
 
May 15, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 11.0 μg/m3 (10) 5.7 μg/m3 (24) 24.0
 
May 15, 2019, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 12.0 μg/m3 (11) 3.8 μg/m3 (16) 18.0
 
May 15, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 13.0 μg/m3 (12) 4.8 μg/m3 (20) 20.0
 
May 15, 2019, 7 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) N/A 14.0 μg/m3 (13) 6.4 μg/m3 (27) 27.0
 
May 15, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 16.0 μg/m3 (15) 4.7 μg/m3 (20) 22.0
 
May 15, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 18.0 μg/m3 (16) 6.7 μg/m3 (28) 28.0
 
May 15, 2019, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 19.0 μg/m3 (17) 7.6 μg/m3 (32) 32.0
 
May 15, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 19.0 μg/m3 (17) 5.6 μg/m3 (23) 33.0
 
May 15, 2019, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 15.0 μg/m3 (14) 5.6 μg/m3 (23) 36.0
 
May 15, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 14.0 μg/m3 (13) 7.0 μg/m3 (29) 37.0
 
May 15, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 29.0 μg/m3 (26) 4.4 μg/m3 (18) 38.0
 
May 14, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 19.0 μg/m3 (17) 3.8 μg/m3 (16) 38.0
 
May 14, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 13.0 μg/m3 (12) 2.8 μg/m3 (12) 12.0
 
May 14, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 21.0 μg/m3 (19) 2.6 μg/m3 (11) 19.0
 
May 14, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 15.0 μg/m3 (14) 3.2 μg/m3 (13) 14.0
 
May 14, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 14.0 μg/m3 (13) 2.6 μg/m3 (11) 13.0
 
May 14, 2019, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 13.0 μg/m3 (12) 2.2 μg/m3 (9) 12.0
 
May 14, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 16.0 μg/m3 (15) 3.9 μg/m3 (16) 35.0
 
May 14, 2019, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 16.0 μg/m3 (15) 4.1 μg/m3 (17) 33.0
 
May 14, 2019, 3 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 17.0 μg/m3 (15) 2.9 μg/m3 (12) 32.0
 
May 14, 2019, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 16.0 μg/m3 (15) 7.1 μg/m3 (30) 31.0
 
May 14, 2019, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 15.0 μg/m3 (14) 8.1 μg/m3 (34) 34.0
 
May 14, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 16.0 μg/m3 (15) 5.5 μg/m3 (23) 25.0
 
May 14, 2019, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 17.0 μg/m3 (15) 6.6 μg/m3 (28) 28.0
 
May 14, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 16.0 μg/m3 (15) 8.5 μg/m3 (35) 35.0
 
May 14, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 17.0 μg/m3 (15) 5.5 μg/m3 (23) 26.0
 
May 14, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 18.0 μg/m3 (16) 5.5 μg/m3 (23) 25.0
 
May 14, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 18.0 μg/m3 (16) 5.4 μg/m3 (23) 28.0
 
May 14, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 17.0 μg/m3 (15) 3.3 μg/m3 (14) 26.0
 
May 14, 2019, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 22.0 μg/m3 (20) 3.0 μg/m3 (12) 24.0
 
May 14, 2019, 4 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 19.0 μg/m3 (17) 4.1 μg/m3 (17) 29.0
 
May 14, 2019, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 16.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
May 14, 2019, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 13.0 μg/m3 (12) 2.1 μg/m3 (9) 28.0
 
May 14, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 14.0 μg/m3 (13) 2.2 μg/m3 (9) 30.0
 
May 14, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 14.0 μg/m3 (13) 4.0 μg/m3 (17) 35.0
 
May 13, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 11.0 μg/m3 (10) 4.1 μg/m3 (17) 36.0
 
May 13, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 12.0 μg/m3 (11) 3.4 μg/m3 (14) 36.0
 
May 13, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 10.0 μg/m3 (9) 2.7 μg/m3 (11) 35.0
 
May 13, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 8.0 μg/m3 (7) 2.2 μg/m3 (9) 35.0
 
May 13, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 7.0 μg/m3 (6) N/A 32.0
 
May 13, 2019, 6 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 9.0 μg/m3 (8) N/A 29.0
 
May 13, 2019, 5 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 5.0 μg/m3 (5) N/A 26.0
 
May 13, 2019, 4 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 24.0
 
May 13, 2019, 3 p.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) N/A 9.0 μg/m3 (8) 5.5 μg/m3 (23) 23.0
 
May 13, 2019, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 8.0 μg/m3 (7) 4.4 μg/m3 (18) 21.0
 
May 13, 2019, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 9.0 μg/m3 (8) 5.3 μg/m3 (22) 22.0
 
May 13, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 9.0 μg/m3 (8) 5.9 μg/m3 (25) 25.0
 
May 13, 2019, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 8.0 μg/m3 (7) 4.6 μg/m3 (19) 19.0
 
May 13, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 8.0 μg/m3 (7) 3.4 μg/m3 (14) 18.0
 
May 13, 2019, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 8.0 μg/m3 (7) 3.8 μg/m3 (16) 21.0
 
May 13, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 12.0 μg/m3 (11) 4.6 μg/m3 (19) 21.0
 
May 13, 2019, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 10.0 μg/m3 (9) 6.8 μg/m3 (28) 28.0
 
May 13, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 10.0 μg/m3 (9) 7.5 μg/m3 (31) 31.0
 
May 13, 2019, 5 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 11.0 μg/m3 (10) 7.8 μg/m3 (32) 32.0
 
May 13, 2019, 4 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 14.0 μg/m3 (13) 9.5 μg/m3 (40) 40.0
 
May 13, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 16.0 μg/m3 (15) 8.6 μg/m3 (36) 36.0
 
May 13, 2019, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 31.0 μg/m3 (28) 11.7 μg/m3 (49) 49.0
 
May 13, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 17.0 μg/m3 (15) 11.1 μg/m3 (46) 46.0
 
May 13, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) N/A 23.0 μg/m3 (21) 11.5 μg/m3 (48) 48.0
 
May 12, 2019, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 48.0 ppb (37) N/A 12.0 μg/m3 (11) 7.3 μg/m3 (30) 37.0
 
May 12, 2019, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 13.0 μg/m3 (12) 8.0 μg/m3 (33) 37.0
 
May 12, 2019, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 11.0 μg/m3 (10) 7.2 μg/m3 (30) 38.0
 
May 12, 2019, 8 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 13.0 μg/m3 (12) 7.7 μg/m3 (32) 35.0
 
May 12, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 14.0 μg/m3 (13) 4.9 μg/m3 (20) 34.0
 
May 12, 2019, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 33.0
 
May 12, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 11.0 μg/m3 (10) 7.4 μg/m3 (31) 32.0