AQSQID: 380650002

Site Name: Hannover

Location: Oliver Co, ND

Reporting: True, Located: True

Current AQI: 18.0

Oliver Co ND, US: 47.1858, -101.4281

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 21, 2019, 10 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 23.0 ppb (18) N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 18.0
 
Sept. 21, 2019, 9 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 18.0 ppb (14) N/A -3.0 μg/m3 (0) 2.4 μg/m3 (10) 14.0
 
Sept. 21, 2019, 8 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 9.0 μg/m3 (8) 1.2 μg/m3 (5) 16.0
 
Sept. 21, 2019, 7 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 0.0 μg/m3 (0) 1.2 μg/m3 (5) 24.0
 
Sept. 21, 2019, 6 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) N/A -2.0 μg/m3 (0) -0.5 μg/m3 (0) 15.0
 
Sept. 21, 2019, 5 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 22.0 ppb (17) N/A 7.0 μg/m3 (6) -0.3 μg/m3 (0) 17.0
 
Sept. 21, 2019, 4 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 18.0
 
Sept. 21, 2019, 3 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 22.0
 
Sept. 21, 2019, 2 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 29.0 ppb (22) N/A -4.0 μg/m3 (0) N/A 22.0
 
Sept. 21, 2019, 1 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 23.0 ppb (18) N/A 5.0 μg/m3 (5) 45.3 μg/m3 (124) 124.0
 
Sept. 21, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 16.0 ppb (12) N/A 6.0 μg/m3 (5) 6.2 μg/m3 (26) 26.0
 
Sept. 20, 2019, 11 p.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 21.0 ppb (16) N/A 15.0 μg/m3 (14) 4.4 μg/m3 (18) 18.0
 
Sept. 20, 2019, 10 p.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 11.0 μg/m3 (10) 6.9 μg/m3 (29) 29.0
 
Sept. 20, 2019, 9 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 8.0 μg/m3 (7) 14.3 μg/m3 (55) 55.0
 
Sept. 20, 2019, 8 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 23.0 μg/m3 (21) 8.8 μg/m3 (37) 37.0
 
Sept. 20, 2019, 7 p.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 19.0 μg/m3 (17) 5.6 μg/m3 (23) 23.0
 
Sept. 20, 2019, 6 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 22.0 μg/m3 (20) 3.8 μg/m3 (16) 21.0
 
Sept. 20, 2019, 5 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 21.0 μg/m3 (19) 2.9 μg/m3 (12) 22.0
 
Sept. 20, 2019, 4 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 20.0
 
Sept. 20, 2019, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 20.0 ppb (15) N/A 13.0 μg/m3 (12) 1.7 μg/m3 (7) 15.0
 
Sept. 20, 2019, 2 p.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 21.0 ppb (16) N/A 17.0 μg/m3 (15) 2.5 μg/m3 (10) 16.0
 
Sept. 20, 2019, 1 p.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 11.0 μg/m3 (10) 4.6 μg/m3 (19) 19.0
 
Sept. 20, 2019, noon 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 13.0 μg/m3 (12) 2.6 μg/m3 (11) 18.0
 
Sept. 20, 2019, 11 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 13.0 μg/m3 (12) 3.2 μg/m3 (13) 20.0
 
Sept. 20, 2019, 10 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 21.0
 
Sept. 20, 2019, 9 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 11.0 μg/m3 (10) 2.9 μg/m3 (12) 23.0
 
Sept. 20, 2019, 8 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 14.0 μg/m3 (13) 1.5 μg/m3 (6) 24.0
 
Sept. 20, 2019, 7 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 13.0 μg/m3 (12) 2.1 μg/m3 (9) 25.0
 
Sept. 20, 2019, 6 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 19.0 μg/m3 (17) 3.5 μg/m3 (15) 26.0
 
Sept. 20, 2019, 5 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 24.0 μg/m3 (22) 5.2 μg/m3 (22) 24.0
 
Sept. 20, 2019, 4 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 21.0 μg/m3 (19) 8.1 μg/m3 (34) 34.0
 
Sept. 20, 2019, 3 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 23.0 μg/m3 (21) 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2019, 2 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 24.0 μg/m3 (22) 6.7 μg/m3 (28) 28.0
 
Sept. 20, 2019, 1 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 25.0 μg/m3 (23) 6.7 μg/m3 (28) 28.0
 
Sept. 20, 2019, midnight 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 34.0 μg/m3 (31) 5.7 μg/m3 (24) 31.0
 
Sept. 19, 2019, 11 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 26.0 μg/m3 (24) 4.9 μg/m3 (20) 31.0
 
Sept. 19, 2019, 10 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) N/A 26.0 μg/m3 (24) 4.6 μg/m3 (19) 32.0
 
Sept. 19, 2019, 9 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) N/A 26.0 μg/m3 (24) 2.2 μg/m3 (9) 32.0
 
Sept. 19, 2019, 8 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 20.0 μg/m3 (18) 2.2 μg/m3 (9) 31.0
 
Sept. 19, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 23.0 μg/m3 (21) 3.3 μg/m3 (14) 31.0
 
Sept. 19, 2019, 6 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 17.0 μg/m3 (15) 4.1 μg/m3 (17) 30.0
 
Sept. 19, 2019, 5 p.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 26.0 μg/m3 (24) 3.6 μg/m3 (15) 29.0
 
Sept. 19, 2019, 4 p.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 24.0 μg/m3 (22) 5.8 μg/m3 (24) 28.0
 
Sept. 19, 2019, 3 p.m. 6.0 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 3.0 ppb (4) 27.0 ppb (21) N/A 29.0 μg/m3 (26) 5.3 μg/m3 (22) 26.0
 
Sept. 19, 2019, 2 p.m. 9.2 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 7.0 ppb (10) 20.0 ppb (15) N/A 27.0 μg/m3 (25) 5.4 μg/m3 (23) 25.0
 
Sept. 19, 2019, 1 p.m. 7.2 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 3.0 ppb (4) 19.0 ppb (15) N/A 22.0 μg/m3 (20) 5.8 μg/m3 (24) 24.0
 
Sept. 19, 2019, noon 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 25.0 ppb (19) N/A 16.0 μg/m3 (15) 4.3 μg/m3 (18) 19.0
 
Sept. 19, 2019, 11 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 10.0 μg/m3 (9) 3.8 μg/m3 (16) 22.0
 
Sept. 19, 2019, 10 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 12.0 μg/m3 (11) 1.5 μg/m3 (6) 22.0
 
Sept. 19, 2019, 9 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 7.0 μg/m3 (6) 0.4 μg/m3 (2) 26.0
 
Sept. 19, 2019, 8 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 10.0 μg/m3 (9) 0.2 μg/m3 (1) 27.0
 
Sept. 19, 2019, 7 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 1.5 μg/m3 (6) 28.0
 
Sept. 19, 2019, 6 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 6.0 μg/m3 (5) 2.7 μg/m3 (11) 28.0
 
Sept. 19, 2019, 5 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 7.0 μg/m3 (6) 3.3 μg/m3 (14) 28.0
 
Sept. 19, 2019, 4 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 5.0 μg/m3 (5) 4.6 μg/m3 (19) 28.0
 
Sept. 19, 2019, 3 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 27.0
 
Sept. 19, 2019, 2 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 12.0 μg/m3 (11) 3.6 μg/m3 (15) 25.0
 
Sept. 19, 2019, 1 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 16.0 μg/m3 (15) 3.5 μg/m3 (15) 27.0
 
Sept. 19, 2019, midnight 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 21.0 μg/m3 (19) 5.7 μg/m3 (24) 28.0
 
Sept. 18, 2019, 11 p.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 3.0 ppb (4) 39.0 ppb (30) N/A 24.0 μg/m3 (22) 5.6 μg/m3 (23) 30.0
 
Sept. 18, 2019, 10 p.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 42.0 ppb (32) N/A 19.0 μg/m3 (17) 5.1 μg/m3 (21) 32.0
 
Sept. 18, 2019, 9 p.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 44.0 ppb (34) N/A 15.0 μg/m3 (14) 6.5 μg/m3 (27) 34.0
 
Sept. 18, 2019, 8 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 15.0 μg/m3 (14) 5.5 μg/m3 (23) 33.0
 
Sept. 18, 2019, 7 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 13.0 μg/m3 (12) 7.5 μg/m3 (31) 32.0
 
Sept. 18, 2019, 6 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 17.0 μg/m3 (15) 5.9 μg/m3 (25) 29.0
 
Sept. 18, 2019, 5 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 19.0 μg/m3 (17) 6.3 μg/m3 (26) 26.0
 
Sept. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 30.0 ppb (23) N/A 23.0 μg/m3 (21) 8.9 μg/m3 (37) 37.0
 
Sept. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A 5.0 ppb (7) 23.0 ppb (18) N/A 24.0 μg/m3 (22) 5.6 μg/m3 (23) 23.0
 
Sept. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A 5.0 ppb (7) 21.0 ppb (16) N/A 16.0 μg/m3 (15) 6.4 μg/m3 (27) 27.0
 
Sept. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 21.0 ppb (16) N/A 13.0 μg/m3 (12) 4.6 μg/m3 (19) 19.0
 
Sept. 18, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 26.0 ppb (20) N/A 10.0 μg/m3 (9) 0.9 μg/m3 (4) 20.0
 
Sept. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 27.0 ppb (21) N/A 10.0 μg/m3 (9) 1.1 μg/m3 (5) 21.0
 
Sept. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) N/A 6.0 μg/m3 (5) 2.4 μg/m3 (10) 25.0
 
Sept. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 38.0 ppb (29) N/A 5.0 μg/m3 (5) 4.6 μg/m3 (19) 29.0
 
Sept. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A 6.0 μg/m3 (5) 6.8 μg/m3 (28) 30.0
 
Sept. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A 5.0 μg/m3 (5) 5.4 μg/m3 (23) 30.0
 
Sept. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 35.0 ppb (27) N/A 6.0 μg/m3 (5) 7.3 μg/m3 (30) 30.0
 
Sept. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 31.0 ppb (24) N/A 17.0 μg/m3 (15) 2.7 μg/m3 (11) 24.0
 
Sept. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 34.0 ppb (26) N/A 17.0 μg/m3 (15) 4.4 μg/m3 (18) 26.0
 
Sept. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A 18.0 μg/m3 (16) 6.6 μg/m3 (28) 30.0
 
Sept. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) N/A 35.0 μg/m3 (32) 6.1 μg/m3 (25) 32.0
 
Sept. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 27.0 ppb (21) N/A 23.0 μg/m3 (21) 5.3 μg/m3 (22) 22.0
 
Sept. 18, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 27.0 ppb (21) N/A 34.0 μg/m3 (31) 7.6 μg/m3 (32) 32.0
 
Sept. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 29.0 ppb (22) N/A 26.0 μg/m3 (24) 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 30.0 ppb (23) N/A 37.0 μg/m3 (34) 6.8 μg/m3 (28) 34.0
 
Sept. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) N/A 34.0 μg/m3 (31) 8.3 μg/m3 (35) 35.0
 
Sept. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 36.0 ppb (28) N/A 30.0 μg/m3 (27) 8.2 μg/m3 (34) 34.0
 
Sept. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 34.0 ppb (26) N/A 24.0 μg/m3 (22) 10.2 μg/m3 (42) 42.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) N/A 29.0 μg/m3 (26) 9.4 μg/m3 (39) 39.0
 
Sept. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) N/A 27.0 μg/m3 (25) 8.6 μg/m3 (36) 36.0
 
Sept. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 26.0 ppb (20) N/A 26.0 μg/m3 (24) 10.5 μg/m3 (44) 44.0
 
Sept. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 26.0 ppb (20) N/A 27.0 μg/m3 (25) 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 24.0 ppb (18) N/A 21.0 μg/m3 (19) 9.5 μg/m3 (40) 40.0
 
Sept. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 21.0 ppb (16) N/A 19.0 μg/m3 (17) 10.8 μg/m3 (45) 45.0
 
Sept. 17, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) N/A 18.0 μg/m3 (16) 9.7 μg/m3 (40) 40.0
 
Sept. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) N/A 20.0 μg/m3 (18) 6.8 μg/m3 (28) 28.0
 
Sept. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) N/A 18.0 μg/m3 (16) 8.8 μg/m3 (37) 37.0
 
Sept. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 23.0 ppb (18) N/A 17.0 μg/m3 (15) 8.7 μg/m3 (36) 36.0
 
Sept. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 23.0 ppb (18) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
Sept. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 26.0 ppb (20) N/A 16.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 28.0 ppb (22) N/A 19.0 μg/m3 (17) 9.5 μg/m3 (40) 40.0
 
Sept. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 28.0 ppb (22) N/A 17.0 μg/m3 (15) 8.3 μg/m3 (35) 35.0
 
Sept. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 30.0 ppb (23) N/A 20.0 μg/m3 (18) 7.4 μg/m3 (31) 31.0
 
Sept. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 29.0 ppb (22) N/A 22.0 μg/m3 (20) 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 29.0 ppb (22) N/A 24.0 μg/m3 (22) 8.1 μg/m3 (34) 34.0
 
Sept. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 30.0 ppb (23) N/A 22.0 μg/m3 (20) 6.9 μg/m3 (29) 29.0
 
Sept. 17, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 31.0 ppb (24) N/A 24.0 μg/m3 (22) 23.0 μg/m3 (73) 73.0
 
Sept. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 34.0 ppb (26) N/A 27.0 μg/m3 (25) 5.0 μg/m3 (21) 26.0
 
Sept. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 40.0 ppb (31) N/A 30.0 μg/m3 (27) 3.7 μg/m3 (15) 31.0
 
Sept. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A 29.0 μg/m3 (26) 5.2 μg/m3 (22) 30.0
 
Sept. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 36.0 ppb (28) N/A 28.0 μg/m3 (25) 7.6 μg/m3 (32) 32.0
 
Sept. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A 24.0 μg/m3 (22) 7.7 μg/m3 (32) 32.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (11) 4.5 μg/m3 (19) 19.0
 
Sept. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 23.0 μg/m3 (21) 4.7 μg/m3 (20) 21.0
 
Sept. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 41.6 μg/m3 (115) 115.0
 
Sept. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Sept. 16, 2019, 2 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 16.0 μg/m3 (15) 7.3 μg/m3 (30) 30.0
 
Sept. 16, 2019, 1 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 18.0 ppb (14) N/A 11.0 μg/m3 (10) 7.6 μg/m3 (32) 32.0
 
Sept. 16, 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 13.0 μg/m3 (12) 2.9 μg/m3 (12) 15.0
 
Sept. 16, 2019, 11 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 6.0 μg/m3 (5) 3.3 μg/m3 (14) 15.0
 
Sept. 16, 2019, 10 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) N/A 10.0 μg/m3 (9) 4.1 μg/m3 (17) 17.0
 
Sept. 16, 2019, 9 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 21.0 ppb (16) N/A 10.0 μg/m3 (9) 4.8 μg/m3 (20) 20.0
 
Sept. 16, 2019, 8 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 21.0 ppb (16) N/A 11.0 μg/m3 (10) 5.3 μg/m3 (22) 22.0
 
Sept. 16, 2019, 7 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 11.0 μg/m3 (10) 4.2 μg/m3 (18) 18.0
 
Sept. 16, 2019, 6 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 25.0 ppb (19) N/A 12.0 μg/m3 (11) 1.6 μg/m3 (7) 19.0
 
Sept. 16, 2019, 5 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 14.0 μg/m3 (13) 2.0 μg/m3 (8) 21.0
 
Sept. 16, 2019, 4 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 16.0 μg/m3 (15) 4.5 μg/m3 (19) 22.0
 
Sept. 16, 2019, 3 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 18.0 μg/m3 (16) 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 18.0 μg/m3 (16) 5.0 μg/m3 (21) 22.0
 
Sept. 16, 2019, 1 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 22.0 μg/m3 (20) 1.9 μg/m3 (8) 25.0
 
Sept. 16, 2019, midnight 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 15.0 μg/m3 (14) -0.2 μg/m3 (0) 25.0
 
Sept. 15, 2019, 11 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 14.0 μg/m3 (13) 0.9 μg/m3 (4) 28.0
 
Sept. 15, 2019, 10 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 21.0 μg/m3 (19) 0.9 μg/m3 (4) 28.0
 
Sept. 15, 2019, 9 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 14.0 μg/m3 (13) 1.9 μg/m3 (8) 30.0
 
Sept. 15, 2019, 8 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 10.0 μg/m3 (9) 3.2 μg/m3 (13) 29.0
 
Sept. 15, 2019, 7 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 13.0 μg/m3 (12) 3.5 μg/m3 (15) 28.0
 
Sept. 15, 2019, 6 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 13.0 μg/m3 (12) 5.6 μg/m3 (23) 28.0
 
Sept. 15, 2019, 5 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 26.0
 
Sept. 15, 2019, 4 p.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 11.0 μg/m3 (10) 1.4 μg/m3 (6) 25.0
 
Sept. 15, 2019, 3 p.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 10.0 μg/m3 (9) 0.5 μg/m3 (2) 18.0
 
Sept. 15, 2019, 2 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 19.0 ppb (15) N/A 15.0 μg/m3 (14) 1.0 μg/m3 (4) 15.0
 
Sept. 15, 2019, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 22.0 ppb (17) N/A 17.0 μg/m3 (15) 2.7 μg/m3 (11) 17.0
 
Sept. 15, 2019, noon 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 23.0
 
Sept. 15, 2019, 11 a.m. 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 24.0
 
Sept. 15, 2019, 10 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 8.0 μg/m3 (7) 4.3 μg/m3 (18) 18.0
 
Sept. 15, 2019, 9 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 9.0 μg/m3 (8) 2.8 μg/m3 (12) 18.0
 
Sept. 15, 2019, 8 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 10.0 μg/m3 (9) 1.6 μg/m3 (7) 21.0
 
Sept. 15, 2019, 7 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 9.0 μg/m3 (8) 3.2 μg/m3 (13) 22.0
 
Sept. 15, 2019, 6 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 10.0 μg/m3 (9) 0.6 μg/m3 (2) 22.0
 
Sept. 15, 2019, 5 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 8.0 μg/m3 (7) -1.2 μg/m3 (0) 22.0
 
Sept. 15, 2019, 4 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 21.0
 
Sept. 15, 2019, 3 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 13.0 μg/m3 (12) 5.2 μg/m3 (22) 22.0
 
Sept. 15, 2019, 2 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 3.0 ppb (4) 36.0 ppb (28) N/A 11.0 μg/m3 (10) 2.1 μg/m3 (9) 28.0
 
Sept. 15, 2019, 1 a.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 6.0 μg/m3 (5) 3.3 μg/m3 (14) 29.0
 
Sept. 15, 2019, midnight 1.2 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 3.0 ppb (4) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (7) 27.0
 
Sept. 14, 2019, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 13.0 μg/m3 (12) -1.0 μg/m3 (0) 28.0
 
Sept. 14, 2019, 10 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 7.0 μg/m3 (6) 0.7 μg/m3 (3) 30.0
 
Sept. 14, 2019, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 7.0 μg/m3 (6) -1.3 μg/m3 (0) 28.0
 
Sept. 14, 2019, 8 p.m. 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 7.0 μg/m3 (6) -1.1 μg/m3 (0) 30.0
 
Sept. 14, 2019, 7 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 5.0 μg/m3 (5) 0.6 μg/m3 (2) 31.0
 
Sept. 14, 2019, 6 p.m. 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 3.0 μg/m3 (3) 1.9 μg/m3 (8) 30.0
 
Sept. 14, 2019, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (27) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 27.0
 
Sept. 14, 2019, 4 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 3.0 ppb (4) 33.0 ppb (25) N/A 5.0 μg/m3 (5) 2.4 μg/m3 (10) 25.0
 
Sept. 14, 2019, 3 p.m. 4.4 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 5.0 ppb (7) 28.0 ppb (22) N/A 7.0 μg/m3 (6) 4.2 μg/m3 (18) 22.0
 
Sept. 14, 2019, 2 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 29.0 ppb (22) N/A 7.0 μg/m3 (6) 5.4 μg/m3 (23) 23.0
 
Sept. 14, 2019, 1 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 12.0 μg/m3 (11) 3.8 μg/m3 (16) 19.0
 
Sept. 14, 2019, noon 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 24.0
 
Sept. 14, 2019, 11 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 6.0 μg/m3 (5) 2.4 μg/m3 (10) 21.0