AQSQID: 380130004

Site Name: Lostwood Nwr

Location: Burke Co, ND

Reporting: True, Located: True

Current AQI: 28.0

Burke Co ND, US: 48.641899, -102.402199

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 24, 2019, 10 p.m. 0.0 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 28.0
 
March 24, 2019, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 5.0 μg/m3 (5) 1.1 μg/m3 (5) 28.0
 
March 24, 2019, 8 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (7) 28.0
 
March 24, 2019, 7 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 26.0
 
March 24, 2019, 6 p.m. 0.0 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 5.0 μg/m3 (5) 4.1 μg/m3 (17) 25.0
 
March 24, 2019, 5 p.m. 0.0 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 25.0
 
March 24, 2019, 4 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 5.0 μg/m3 (5) -0.5 μg/m3 (0) 25.0
 
March 24, 2019, 3 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 5.0 μg/m3 (5) 0.5 μg/m3 (2) 25.0
 
March 24, 2019, 2 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 5.0 μg/m3 (5) 0.3 μg/m3 (1) 25.0
 
March 24, 2019, 1 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 5.0 μg/m3 (5) -1.0 μg/m3 (0) 25.0
 
March 24, 2019, noon 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 4.0 μg/m3 (4) -0.6 μg/m3 (0) 26.0
 
March 24, 2019, 11 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 5.0 μg/m3 (5) -3.9 μg/m3 (0) 26.0
 
March 24, 2019, 10 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 4.0 μg/m3 (4) N/A 28.0
 
March 24, 2019, 9 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 3.0 μg/m3 (3) N/A 29.0
 
March 24, 2019, 8 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 3.0 μg/m3 (3) -4.3 μg/m3 (0) 29.0
 
March 24, 2019, 7 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 5.0 μg/m3 (5) 1.5 μg/m3 (6) 28.0
 
March 24, 2019, 6 a.m. 0.1 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 28.0
 
March 24, 2019, 5 a.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 7.0 μg/m3 (6) 6.6 μg/m3 (28) 28.0
 
March 24, 2019, 4 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 9.0 μg/m3 (8) 7.4 μg/m3 (31) 31.0
 
March 24, 2019, 3 a.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 9.0 μg/m3 (8) 5.3 μg/m3 (22) 22.0
 
March 24, 2019, 2 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 12.0 μg/m3 (11) 3.3 μg/m3 (14) 22.0
 
March 24, 2019, 1 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 16.0 μg/m3 (15) 2.7 μg/m3 (11) 23.0
 
March 24, 2019, midnight 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 14.0 μg/m3 (13) 4.1 μg/m3 (17) 26.0
 
March 23, 2019, 11 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 11.0 μg/m3 (10) 3.6 μg/m3 (15) 32.0
 
March 23, 2019, 10 p.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 11.0 μg/m3 (10) 2.5 μg/m3 (10) 34.0
 
March 23, 2019, 9 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 9.0 μg/m3 (8) 1.3 μg/m3 (5) 32.0
 
March 23, 2019, 8 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 9.0 μg/m3 (8) 0.2 μg/m3 (1) 32.0
 
March 23, 2019, 7 p.m. 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 34.0
 
March 23, 2019, 6 p.m. 3.5 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 9.0 μg/m3 (8) 4.6 μg/m3 (19) 31.0
 
March 23, 2019, 5 p.m. 5.7 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 9.0 μg/m3 (8) 0.5 μg/m3 (2) 28.0
 
March 23, 2019, 4 p.m. 4.9 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 4.2 μg/m3 (18) 28.0
 
March 23, 2019, 3 p.m. 4.9 ppb (5) 1.4 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 8.0 μg/m3 (7) 7.7 μg/m3 (32) 32.0
 
March 23, 2019, 2 p.m. 4.7 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 7.0 μg/m3 (6) 6.4 μg/m3 (27) 27.0
 
March 23, 2019, 1 p.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 6.0 μg/m3 (5) 2.4 μg/m3 (10) 19.0
 
March 23, 2019, noon 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 6.0 μg/m3 (5) -1.0 μg/m3 (0) 22.0
 
March 23, 2019, 11 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 22.0
 
March 23, 2019, 10 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 5.0 μg/m3 (5) 0.9 μg/m3 (4) 23.0
 
March 23, 2019, 9 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 4.0 μg/m3 (4) 2.3 μg/m3 (10) 24.0
 
March 23, 2019, 8 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 4.0 μg/m3 (4) 2.9 μg/m3 (12) 25.0
 
March 23, 2019, 7 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 4.0 μg/m3 (4) 3.5 μg/m3 (15) 26.0
 
March 23, 2019, 6 a.m. 1.1 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) 1.8 μg/m3 (8) 27.0
 
March 23, 2019, 5 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 27.0
 
March 23, 2019, 4 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 2.4 μg/m3 (10) 27.0
 
March 23, 2019, 3 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 4.0 μg/m3 (4) 1.5 μg/m3 (6) 28.0
 
March 23, 2019, 2 a.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 31.0
 
March 23, 2019, 1 a.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 31.0
 
March 23, 2019, midnight 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 32.0
 
March 22, 2019, 11 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) N/A 7.0 μg/m3 (6) 5.7 μg/m3 (24) 34.0
 
March 22, 2019, 10 p.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 45.0 ppb (35) N/A 9.0 μg/m3 (8) 3.7 μg/m3 (15) 35.0
 
March 22, 2019, 9 p.m. 2.0 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 47.0 ppb (36) N/A 8.0 μg/m3 (7) 5.6 μg/m3 (23) 36.0
 
March 22, 2019, 8 p.m. 2.3 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 3.6 μg/m3 (15) 35.0
 
March 22, 2019, 7 p.m. 2.4 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 1.7 μg/m3 (7) 35.0
 
March 22, 2019, 6 p.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 47.0 ppb (36) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 36.0
 
March 22, 2019, 5 p.m. 1.9 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) N/A 6.0 μg/m3 (5) 7.2 μg/m3 (30) 34.0
 
March 22, 2019, 4 p.m. 4.1 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A 3.0 ppb (4) 42.0 ppb (32) N/A 6.0 μg/m3 (5) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 3 p.m. 1.5 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 5.4 μg/m3 (23) 33.0
 
March 22, 2019, 2 p.m. 0.7 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 34.0
 
March 22, 2019, 1 p.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 5.0 μg/m3 (5) 5.3 μg/m3 (22) 32.0
 
March 22, 2019, noon 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 5.0 μg/m3 (5) -1.5 μg/m3 (0) 31.0
 
March 22, 2019, 11 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) N/A 6.0 μg/m3 (5) -2.4 μg/m3 (0) 31.0
 
March 22, 2019, 10 a.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 5.0 μg/m3 (5) -2.9 μg/m3 (0) 32.0
 
March 22, 2019, 9 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 4.0 μg/m3 (4) -1.9 μg/m3 (0) 32.0
 
March 22, 2019, 8 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 3.0 μg/m3 (3) -1.0 μg/m3 (0) 32.0
 
March 22, 2019, 7 a.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 4.0 μg/m3 (4) N/A 31.0
 
March 22, 2019, 6 a.m. 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 3.0 μg/m3 (3) N/A 33.0
 
March 22, 2019, 5 a.m. 0.2 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 4.0 μg/m3 (4) 2.7 μg/m3 (11) 32.0
 
March 22, 2019, 4 a.m. 0.4 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 5.0 μg/m3 (5) 4.1 μg/m3 (17) 32.0
 
March 22, 2019, 3 a.m. 0.5 ppb (0) 0.1 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 5.0 μg/m3 (5) 0.1 μg/m3 (0) 31.0
 
March 22, 2019, 2 a.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 2.2 μg/m3 (9) 28.0
 
March 22, 2019, 1 a.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 6.0 μg/m3 (5) 2.9 μg/m3 (12) 29.0
 
March 22, 2019, midnight 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 6.0 μg/m3 (5) 1.5 μg/m3 (6) 32.0
 
March 21, 2019, 11 p.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 7.0 μg/m3 (6) 1.6 μg/m3 (7) 33.0
 
March 21, 2019, 10 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 5.0 μg/m3 (5) 3.1 μg/m3 (13) 34.0
 
March 21, 2019, 9 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 7.0 μg/m3 (6) 4.8 μg/m3 (20) 34.0
 
March 21, 2019, 8 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 7.0 μg/m3 (6) 7.8 μg/m3 (32) 35.0
 
March 21, 2019, 7 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 9.0 μg/m3 (8) N/A 35.0
 
March 21, 2019, 6 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) N/A 8.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A N/A 32.0
 
March 21, 2019, 3 p.m. 4.9 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 4.0 ppb (6) 42.0 ppb (32) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 32.0
 
March 21, 2019, 2 p.m. 6.4 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 7.0 ppb (10) 40.0 ppb (31) N/A 7.0 μg/m3 (6) 7.6 μg/m3 (32) 32.0
 
March 21, 2019, 1 p.m. 6.1 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A 2.0 ppb (3) 38.0 ppb (29) N/A 6.0 μg/m3 (5) 10.1 μg/m3 (42) 42.0
 
March 21, 2019, noon 5.0 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 7.0 μg/m3 (6) 9.5 μg/m3 (40) 40.0
 
March 21, 2019, 11 a.m. 5.2 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 6.0 μg/m3 (5) 10.6 μg/m3 (44) 44.0
 
March 21, 2019, 10 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) N/A 7.0 μg/m3 (6) 11.8 μg/m3 (49) 49.0
 
March 21, 2019, 9 a.m. 5.3 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 7.0 μg/m3 (6) 10.6 μg/m3 (44) 44.0
 
March 21, 2019, 8 a.m. 5.3 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 8.0 μg/m3 (7) 11.2 μg/m3 (47) 47.0
 
March 21, 2019, 7 a.m. 5.7 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 10.0 μg/m3 (9) 13.2 μg/m3 (53) 53.0
 
March 21, 2019, 6 a.m. 5.3 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 42.0 ppb (32) N/A 10.0 μg/m3 (9) 9.1 μg/m3 (38) 38.0
 
March 21, 2019, 5 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 44.0 ppb (34) N/A 8.0 μg/m3 (7) 6.3 μg/m3 (26) 34.0
 
March 21, 2019, 4 a.m. 4.0 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 10.0 μg/m3 (9) 8.5 μg/m3 (35) 35.0
 
March 21, 2019, 3 a.m. 4.5 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 2 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 17.0 μg/m3 (15) 10.2 μg/m3 (42) 42.0
 
March 21, 2019, 1 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 15.0 μg/m3 (14) 8.9 μg/m3 (37) 38.0
 
March 21, 2019, midnight 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 36.0
 
March 20, 2019, 11 p.m. 3.5 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 13.0 μg/m3 (12) 9.4 μg/m3 (39) 39.0
 
March 20, 2019, 10 p.m. 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 12.0 μg/m3 (11) 10.3 μg/m3 (43) 43.0
 
March 20, 2019, 9 p.m. 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 12.0 μg/m3 (11) 7.6 μg/m3 (32) 39.0
 
March 20, 2019, 8 p.m. 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 9.0 μg/m3 (8) 7.1 μg/m3 (30) 39.0
 
March 20, 2019, 7 p.m. 5.2 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 51.0 ppb (39) N/A 10.0 μg/m3 (9) 6.2 μg/m3 (26) 39.0
 
March 20, 2019, 6 p.m. 8.3 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A 8.0 ppb (11) 45.0 ppb (35) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 35.0
 
March 20, 2019, 5 p.m. 4.3 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 46.0 ppb (35) N/A 8.0 μg/m3 (7) 7.9 μg/m3 (33) 35.0
 
March 20, 2019, 4 p.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 8.0 μg/m3 (7) 7.8 μg/m3 (32) 32.0
 
March 20, 2019, 3 p.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 10.6 μg/m3 (44) 44.0
 
March 20, 2019, 2 p.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 10.9 μg/m3 (45) 45.0
 
March 20, 2019, 1 p.m. 3.7 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 8.3 μg/m3 (35) 35.0
 
March 20, 2019, noon 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 8.1 μg/m3 (34) 34.0
 
March 20, 2019, 11 a.m. 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) 5.1 μg/m3 (21) 21.0
 
March 20, 2019, 10 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) 6.4 μg/m3 (27) 27.0
 
March 20, 2019, 9 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 10.1 μg/m3 (42) 42.0
 
March 20, 2019, 8 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 7.8 μg/m3 (32) 32.0
 
March 20, 2019, 7 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) 9.7 μg/m3 (40) 40.0
 
March 20, 2019, 6 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 5 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 9.5 μg/m3 (40) 40.0
 
March 20, 2019, 4 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 5.3 μg/m3 (22) 22.0
 
March 20, 2019, 3 a.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 18.0
 
March 20, 2019, 2 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 6.5 μg/m3 (27) 27.0
 
March 20, 2019, 1 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 6.8 μg/m3 (28) 28.0
 
March 20, 2019, midnight 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (6) 3.8 μg/m3 (16) 16.0
 
March 19, 2019, 11 p.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 12.0
 
March 19, 2019, 10 p.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 19.0
 
March 19, 2019, 9 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 4.4 μg/m3 (18) 18.0
 
March 19, 2019, 8 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 2.2 μg/m3 (9) 9.0
 
March 19, 2019, 7 p.m. 4.3 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 4.9 μg/m3 (20) 20.0
 
March 19, 2019, 6 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (6) 7.4 μg/m3 (31) 31.0
 
March 19, 2019, 5 p.m. 3.0 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 8.0 μg/m3 (7) 9.8 μg/m3 (41) 41.0
 
March 19, 2019, 4 p.m. 3.2 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (9) 14.7 μg/m3 (56) 56.0
 
March 19, 2019, 3 p.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 8.0 μg/m3 (7) 6.1 μg/m3 (25) 25.0
 
March 19, 2019, 2 p.m. 3.0 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (6) 2.7 μg/m3 (11) 11.0
 
March 19, 2019, 1 p.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 12.0
 
March 19, 2019, noon 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) -1.1 μg/m3 (0) 6.0
 
March 19, 2019, 11 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) -1.4 μg/m3 (0) 5.0
 
March 19, 2019, 10 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 6.0 μg/m3 (5) 0.7 μg/m3 (3) 5.0
 
March 19, 2019, 9 a.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 1.9 μg/m3 (8) 8.0
 
March 19, 2019, 8 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 3.2 μg/m3 (13) 13.0
 
March 19, 2019, 7 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 2.7 μg/m3 (11) 11.0
 
March 19, 2019, 6 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 6.6 μg/m3 (28) 28.0
 
March 19, 2019, 5 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 12.6 μg/m3 (51) 51.0
 
March 19, 2019, 4 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 5.5 μg/m3 (23) 23.0
 
March 19, 2019, 3 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 7.4 μg/m3 (31) 31.0
 
March 19, 2019, 2 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 17.0
 
March 19, 2019, 1 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 10.0 μg/m3 (9) 2.8 μg/m3 (12) 12.0
 
March 19, 2019, midnight 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
March 18, 2019, 11 p.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 19.0
 
March 18, 2019, 10 p.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 8.0 μg/m3 (7) 2.3 μg/m3 (10) 10.0
 
March 18, 2019, 9 p.m. 2.8 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 12.0
 
March 18, 2019, 8 p.m. 3.0 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 4.4 μg/m3 (18) 18.0
 
March 18, 2019, 7 p.m. 4.9 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 9.0 μg/m3 (8) 7.1 μg/m3 (30) 30.0
 
March 18, 2019, 6 p.m. 5.5 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 7.6 μg/m3 (32) 32.0
 
March 18, 2019, 5 p.m. 4.8 ppb (4) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (6) 7.6 μg/m3 (32) 32.0
 
March 18, 2019, 4 p.m. 5.3 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 13.8 μg/m3 (54) 54.0
 
March 18, 2019, 3 p.m. 5.5 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 4.0 μg/m3 (4) 5.8 μg/m3 (24) 24.0
 
March 18, 2019, 2 p.m. 4.4 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 1 p.m. 4.5 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (3) 6.8 μg/m3 (28) 28.0
 
March 18, 2019, noon 5.5 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 3.0 μg/m3 (3) 7.5 μg/m3 (31) 31.0
 
March 18, 2019, 11 a.m. 6.4 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) 9.1 μg/m3 (38) 38.0
 
March 18, 2019, 10 a.m. 7.4 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) 4.9 μg/m3 (20) 20.0
 
March 18, 2019, 9 a.m. 7.1 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 5.0 μg/m3 (5) 5.1 μg/m3 (21) 21.0
 
March 18, 2019, 8 a.m. 6.8 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 4.9 μg/m3 (20) 20.0
 
March 18, 2019, 7 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) 8.5 μg/m3 (35) 35.0
 
March 18, 2019, 6 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) N/A N/A 4.0 μg/m3 (4) 7.6 μg/m3 (32) 32.0
 
March 18, 2019, 5 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 2.0 ppb (3) N/A N/A 7.0 μg/m3 (6) 4.3 μg/m3 (18) 18.0
 
March 18, 2019, 4 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 2.9 μg/m3 (12) 12.0
 
March 18, 2019, 3 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 4.0 μg/m3 (4) -2.2 μg/m3 (0) 4.0
 
March 18, 2019, 2 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 4.0 μg/m3 (4) N/A 4.0
 
March 18, 2019, 1 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) N/A 5.0
 
March 18, 2019, midnight 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 7.0
 
March 17, 2019, 11 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 7.4 μg/m3 (31) 31.0