AQSQID: 300830002

Site Name: Sidney 201

Location: Richland Co, MT

Reporting: True, Located: True

Current AQI: 33.0

Richland Co MT, US: 47.8679, -104.676864

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 5.0 μg/m3 (5) 5.1 μg/m3 (21) 33.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) 3.5 μg/m3 (15) 32.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 0.0 μg/m3 (0) 1.1 μg/m3 (5) 32.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A -1.0 μg/m3 (0) 0.0 μg/m3 (0) 34.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 11.0 μg/m3 (10) 1.3 μg/m3 (5) 35.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 3.9 μg/m3 (16) 33.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 9.0 μg/m3 (8) 4.7 μg/m3 (20) 32.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 13.0 μg/m3 (12) 4.6 μg/m3 (19) 32.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 8.0 μg/m3 (7) 6.5 μg/m3 (27) 28.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 22.0 μg/m3 (20) 6.1 μg/m3 (25) 30.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 9.0 μg/m3 (8) 9.1 μg/m3 (38) 38.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 7.0 μg/m3 (6) 11.7 μg/m3 (49) 49.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 11.0 μg/m3 (10) 4.3 μg/m3 (18) 38.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 15.0 μg/m3 (14) 1.8 μg/m3 (8) 38.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 12.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 12.0 μg/m3 (11) 7.1 μg/m3 (30) 38.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 18.0 μg/m3 (16) 6.4 μg/m3 (27) 36.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 7.0 μg/m3 (6) 8.5 μg/m3 (35) 35.0
 
March 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 9.0 μg/m3 (8) 9.2 μg/m3 (38) 38.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 6.0 μg/m3 (5) 12.5 μg/m3 (51) 51.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 7.0 μg/m3 (6) 7.2 μg/m3 (30) 33.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 11.0 μg/m3 (10) 4.4 μg/m3 (18) 33.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 14.0 μg/m3 (13) 6.6 μg/m3 (28) 33.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 12.0 μg/m3 (11) 5.1 μg/m3 (21) 33.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 35.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 1.0 μg/m3 (1) 6.7 μg/m3 (28) 35.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 5.0 μg/m3 (5) 6.2 μg/m3 (26) 35.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 13.0 μg/m3 (12) 3.6 μg/m3 (15) 36.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 36.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 4.0 μg/m3 (4) 4.7 μg/m3 (20) 37.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 5.0 μg/m3 (5) 3.9 μg/m3 (16) 37.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) 7.6 μg/m3 (32) 38.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 6.2 μg/m3 (26) 37.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 6.0 μg/m3 (5) 6.5 μg/m3 (27) 37.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 17.0 μg/m3 (15) 7.9 μg/m3 (33) 36.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 23.0 μg/m3 (21) -2.5 μg/m3 (0) 36.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 10.0 μg/m3 (9) 4.8 μg/m3 (20) 37.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 37.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 7.5 μg/m3 (31) 36.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 6.0 μg/m3 (5) 6.3 μg/m3 (26) 34.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A -3.0 μg/m3 (0) 2.4 μg/m3 (10) 35.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A -2.0 μg/m3 (0) 7.9 μg/m3 (33) 35.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 3.0 μg/m3 (3) 5.3 μg/m3 (22) 34.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 7.0 μg/m3 (6) 6.6 μg/m3 (28) 34.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 14.0 μg/m3 (13) 3.4 μg/m3 (14) 34.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 16.0 μg/m3 (15) 3.7 μg/m3 (15) 34.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 16.0 μg/m3 (15) 9.4 μg/m3 (39) 39.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 14.0 μg/m3 (13) 4.0 μg/m3 (17) 33.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 15.0 μg/m3 (14) 6.3 μg/m3 (26) 34.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 13.0 μg/m3 (12) 4.6 μg/m3 (19) 33.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 11.0 μg/m3 (10) 5.7 μg/m3 (24) 33.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 1.8 μg/m3 (8) 33.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 12.0 μg/m3 (11) 6.2 μg/m3 (26) 33.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 10.0 μg/m3 (9) 5.3 μg/m3 (22) 32.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 8.0 μg/m3 (7) 10.4 μg/m3 (43) 43.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 7.0 μg/m3 (6) 8.5 μg/m3 (35) 35.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 6.8 μg/m3 (28) 34.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 7.0 μg/m3 (6) 8.1 μg/m3 (34) 37.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 8.0 μg/m3 (7) 5.3 μg/m3 (22) 39.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 39.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 5.0 μg/m3 (5) 5.1 μg/m3 (21) 38.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 38.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 0.0 μg/m3 (0) 3.7 μg/m3 (15) 37.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 0.0 μg/m3 (0) 4.0 μg/m3 (17) 36.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A -2.0 μg/m3 (0) 3.7 μg/m3 (15) 36.0
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 9.0 μg/m3 (8) 5.9 μg/m3 (25) 36.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 9.0 μg/m3 (8) 0.6 μg/m3 (2) 36.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 18.0 μg/m3 (16) -3.5 μg/m3 (0) 37.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 10.0 μg/m3 (9) 1.4 μg/m3 (6) 37.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 37.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 7.0 μg/m3 (6) 2.8 μg/m3 (12) 38.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 12.0 μg/m3 (11) 2.7 μg/m3 (11) 38.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 10.0 μg/m3 (9) 1.7 μg/m3 (7) 38.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 5.0 μg/m3 (5) 0.3 μg/m3 (1) 36.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 1.0 μg/m3 (1) 1.4 μg/m3 (6) 32.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 1.0 μg/m3 (1) 6.3 μg/m3 (26) 32.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 6.0 μg/m3 (5) 4.3 μg/m3 (18) 32.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 7.0 μg/m3 (6) 3.1 μg/m3 (13) 32.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 4.0 μg/m3 (4) 0.6 μg/m3 (2) 32.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) 6.0 μg/m3 (25) 31.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 8.0 μg/m3 (7) 3.8 μg/m3 (16) 32.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 5.0 μg/m3 (5) 8.4 μg/m3 (35) 35.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A -3.0 μg/m3 (0) -1.1 μg/m3 (0) 38.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 39.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 7.0 μg/m3 (6) 3.5 μg/m3 (15) 41.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 7.0 μg/m3 (6) 4.3 μg/m3 (18) 41.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A -1.0 μg/m3 (0) 3.7 μg/m3 (15) 39.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 6.5 μg/m3 (27) 38.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 7.0 μg/m3 (6) 8.1 μg/m3 (34) 38.0
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 11.0 μg/m3 (10) 4.6 μg/m3 (19) 38.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 0.0 μg/m3 (0) 2.0 μg/m3 (8) 37.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 12.0 μg/m3 (11) 2.2 μg/m3 (9) 35.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 4.6 μg/m3 (19) 34.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 12.0 μg/m3 (11) 4.7 μg/m3 (20) 34.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 14.0 μg/m3 (13) 1.2 μg/m3 (5) 34.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) 1.6 μg/m3 (7) 35.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 14.0 μg/m3 (13) 7.8 μg/m3 (32) 35.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) 6.8 μg/m3 (28) 35.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.7 μg/m3 (36) 37.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 39.0
 
March 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 3.0 μg/m3 (3) 3.8 μg/m3 (16) 42.0
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 2.0 μg/m3 (2) 2.7 μg/m3 (11) 44.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 6.0 μg/m3 (5) 4.1 μg/m3 (17) 45.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 6.0 μg/m3 (5) 2.6 μg/m3 (11) 44.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 1.0 μg/m3 (1) 4.4 μg/m3 (18) 43.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (12) 42.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 5.0 μg/m3 (5) 3.5 μg/m3 (15) 43.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A -1.0 μg/m3 (0) 3.0 μg/m3 (12) 44.0
 
March 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 0.0 μg/m3 (0) 3.5 μg/m3 (15) 44.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 0.0 μg/m3 (0) 4.8 μg/m3 (20) 43.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 1.0 μg/m3 (1) 7.0 μg/m3 (29) 42.0
 
March 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 0.0 μg/m3 (0) 4.6 μg/m3 (19) 40.0
 
March 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A -3.0 μg/m3 (0) 5.9 μg/m3 (25) 38.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 0.0 μg/m3 (0) 4.3 μg/m3 (18) 38.0
 
March 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 3.0 μg/m3 (3) 7.1 μg/m3 (30) 36.0
 
March 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 6.0 μg/m3 (5) 1.7 μg/m3 (7) 36.0
 
March 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 11.0 μg/m3 (10) 7.3 μg/m3 (30) 36.0
 
March 16, 2019, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 13.0 μg/m3 (12) 8.7 μg/m3 (36) 37.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 12.0 μg/m3 (11) 10.3 μg/m3 (43) 43.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 17.0 μg/m3 (15) 11.6 μg/m3 (48) 48.0
 
March 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 15.0 μg/m3 (14) 12.3 μg/m3 (51) 51.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 15.0 μg/m3 (14) 16.9 μg/m3 (60) 60.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 13.0 μg/m3 (12) 20.6 μg/m3 (68) 68.0
 
March 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 12.0 μg/m3 (11) 4.9 μg/m3 (20) 37.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 14.0 μg/m3 (13) 8.0 μg/m3 (33) 37.0
 
March 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 14.0 μg/m3 (13) 3.3 μg/m3 (14) 38.0
 
March 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 8.0 μg/m3 (7) 6.1 μg/m3 (25) 38.0
 
March 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 3.0 μg/m3 (3) 4.9 μg/m3 (20) 39.0
 
March 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 4.0 μg/m3 (4) 7.5 μg/m3 (31) 38.0
 
March 16, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 39.0
 
March 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 0.0 μg/m3 (0) 4.7 μg/m3 (20) 38.0
 
March 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 38.0
 
March 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A -3.0 μg/m3 (0) 0.0 μg/m3 (0) 38.0
 
March 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 0.0 μg/m3 (0) 4.9 μg/m3 (20) 38.0
 
March 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 0.0 μg/m3 (0) 2.4 μg/m3 (10) 38.0
 
March 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 8.0 μg/m3 (7) 3.6 μg/m3 (15) 38.0
 
March 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A -2.0 μg/m3 (0) 4.3 μg/m3 (18) 37.0
 
March 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.5 μg/m3 (23) 38.0
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A -0.7 μg/m3 (0) 36.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 7.0 μg/m3 (6) 0.2 μg/m3 (1) 35.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 10.0 μg/m3 (9) 9.3 μg/m3 (39) 39.0
 
March 15, 2019, noon N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 5.9 μg/m3 (25) 36.0
 
March 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 10.0 μg/m3 (9) 4.4 μg/m3 (18) 37.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) 3.6 μg/m3 (15) 15.0
 
March 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 8.5 μg/m3 (35) 35.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 11.1 μg/m3 (46) 46.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 11.6 μg/m3 (48) 48.0
 
March 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 7.7 μg/m3 (32) 32.0
 
March 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 24.0 μg/m3 (22) 6.5 μg/m3 (27) 37.0
 
March 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 17.0 μg/m3 (15) 10.5 μg/m3 (44) 44.0
 
March 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 12.0 μg/m3 (11) 10.6 μg/m3 (44) 44.0
 
March 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 5.0 μg/m3 (5) 6.7 μg/m3 (28) 38.0
 
March 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 1.0 μg/m3 (1) 7.4 μg/m3 (31) 39.0
 
March 15, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 10.0 μg/m3 (9) 6.2 μg/m3 (26) 42.0
 
March 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 16.0 μg/m3 (15) 6.2 μg/m3 (26) 41.0
 
March 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 6.0 μg/m3 (5) 5.3 μg/m3 (22) 40.0
 
March 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 1.0 μg/m3 (1) 3.1 μg/m3 (13) 41.0
 
March 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 4.0 μg/m3 (4) 7.3 μg/m3 (30) 42.0
 
March 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A -1.0 μg/m3 (0) 8.4 μg/m3 (35) 42.0
 
March 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 40.0
 
March 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 38.0
 
March 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 11.0 μg/m3 (10) 10.9 μg/m3 (45) 45.0
 
March 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 10.0 μg/m3 (9) 14.1 μg/m3 (54) 54.0
 
March 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 10.0 μg/m3 (9) 2.9 μg/m3 (12) 35.0
 
March 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 16.0 μg/m3 (15) 5.7 μg/m3 (24) 35.0
 
March 14, 2019, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 11.0 μg/m3 (10) 6.3 μg/m3 (26) 35.0
 
March 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 12.0 μg/m3 (11) 3.5 μg/m3 (15) 36.0