AQSQID: 300830002

Site Name: Sidney 201

Location: Richland Co, MT

Reporting: True, Located: True

Current AQI: 40.0

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
Sept. 22, 2019, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 14.0 μg/m3 (13) 9.7 μg/m3 (40) 40.0
 
Sept. 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 15.6 μg/m3 (58) 58.0
 
Sept. 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 10.0 μg/m3 (9) 19.1 μg/m3 (65) 65.0
 
Sept. 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 18.4 μg/m3 (64) 64.0
 
Sept. 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 5.9 μg/m3 (25) 25.0
 
Sept. 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 12.0 μg/m3 (11) 3.1 μg/m3 (13) 18.0
 
Sept. 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 8.0 μg/m3 (7) 2.6 μg/m3 (11) 17.0
 
Sept. 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) 6.1 μg/m3 (25) 25.0
 
Sept. 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
Sept. 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 12.0 μg/m3 (11) 4.5 μg/m3 (19) 19.0
 
Sept. 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 12.0 μg/m3 (11) 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) -2.0 μg/m3 (0) 16.0
 
Sept. 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 4.0 μg/m3 (4) 0.5 μg/m3 (2) 17.0
 
Sept. 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 3.8 μg/m3 (16) 18.0
 
Sept. 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 14.1 μg/m3 (54) 54.0
 
Sept. 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 22.4 μg/m3 (72) 72.0
 
Sept. 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 6.8 μg/m3 (28) 28.0
 
Sept. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) 7.4 μg/m3 (31) 31.0
 
Sept. 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 34.0 μg/m3 (31) 10.1 μg/m3 (42) 42.0
 
Sept. 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) -1.3 μg/m3 (0) 20.0
 
Sept. 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 25.0 μg/m3 (23) 8.3 μg/m3 (35) 35.0
 
Sept. 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 43.0 μg/m3 (39) 8.9 μg/m3 (37) 39.0
 
Sept. 21, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 34.0 μg/m3 (31) 4.7 μg/m3 (20) 31.0
 
Sept. 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 3.0 μg/m3 (3) 11.7 μg/m3 (49) 49.0
 
Sept. 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 20.0 μg/m3 (18) 12.2 μg/m3 (50) 50.0
 
Sept. 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 16.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 16.0 μg/m3 (15) 12.2 μg/m3 (50) 50.0
 
Sept. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 20.0 μg/m3 (18) 13.2 μg/m3 (53) 53.0
 
Sept. 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 20.0 μg/m3 (18) 1.0 μg/m3 (4) 21.0
 
Sept. 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 21.0 μg/m3 (19) N/A 19.0
 
Sept. 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 16.0 μg/m3 (15) -7.3 μg/m3 (0) 15.0
 
Sept. 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 10.0 μg/m3 (9) -3.8 μg/m3 (0) 10.0
 
Sept. 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 11.0 μg/m3 (10) 6.3 μg/m3 (26) 26.0
 
Sept. 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 12.0 μg/m3 (11) 5.7 μg/m3 (24) 24.0
 
Sept. 20, 2019, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 8.0 μg/m3 (7) 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 10.0 μg/m3 (9) 7.7 μg/m3 (32) 32.0
 
Sept. 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 9.0 μg/m3 (8) 3.6 μg/m3 (15) 15.0
 
Sept. 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 7.0 μg/m3 (6) 3.2 μg/m3 (13) 14.0
 
Sept. 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 12.0 μg/m3 (11) 3.0 μg/m3 (12) 14.0
 
Sept. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 8.0 μg/m3 (7) -3.8 μg/m3 (0) 19.0
 
Sept. 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 15.0 μg/m3 (14) 1.0 μg/m3 (4) 23.0
 
Sept. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 15.0 μg/m3 (14) 6.8 μg/m3 (28) 28.0
 
Sept. 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 27.0 μg/m3 (25) 9.9 μg/m3 (41) 41.0
 
Sept. 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 33.0 μg/m3 (30) 4.3 μg/m3 (18) 30.0
 
Sept. 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 31.0 μg/m3 (28) -4.8 μg/m3 (0) 28.0
 
Sept. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 28.0 μg/m3 (25) -4.5 μg/m3 (0) 25.0
 
Sept. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 23.0 μg/m3 (21) N/A 29.0
 
Sept. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 24.0 μg/m3 (22) N/A 34.0
 
Sept. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 21.0 μg/m3 (19) 3.8 μg/m3 (16) 35.0
 
Sept. 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 24.0 μg/m3 (22) 7.9 μg/m3 (33) 35.0
 
Sept. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 22.0 μg/m3 (20) 1.4 μg/m3 (6) 35.0
 
Sept. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 24.0 μg/m3 (22) 0.1 μg/m3 (0) 33.0
 
Sept. 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 21.0 μg/m3 (19) -1.0 μg/m3 (0) 33.0
 
Sept. 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 15.0 μg/m3 (14) -1.2 μg/m3 (0) 31.0
 
Sept. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 17.0 μg/m3 (15) N/A 28.0
 
Sept. 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 10.0 μg/m3 (9) N/A 25.0
 
Sept. 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 3.0 μg/m3 (3) N/A 19.0
 
Sept. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) -0.6 μg/m3 (0) 16.0
 
Sept. 19, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 2.4 μg/m3 (10) 18.0
 
Sept. 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 0.6 μg/m3 (2) 18.0
 
Sept. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 6.6 μg/m3 (28) 28.0
 
Sept. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 4.7 μg/m3 (20) 20.0
 
Sept. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 12.0 μg/m3 (50) 50.0
 
Sept. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 0.0 μg/m3 (0) 9.9 μg/m3 (41) 41.0
 
Sept. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 2.1 μg/m3 (9) 23.0
 
Sept. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 3.7 μg/m3 (15) 24.0
 
Sept. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 2.2 μg/m3 (9) 24.0
 
Sept. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 25.0
 
Sept. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 14.0 μg/m3 (13) 7.8 μg/m3 (32) 32.0
 
Sept. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 13.0 μg/m3 (12) 8.8 μg/m3 (37) 37.0
 
Sept. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 8.7 μg/m3 (36) 36.0
 
Sept. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A -1.0 μg/m3 (0) 9.6 μg/m3 (40) 40.0
 
Sept. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 6.0 μg/m3 (5) 2.2 μg/m3 (9) 29.0
 
Sept. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A -3.0 μg/m3 (0) 0.8 μg/m3 (3) 29.0
 
Sept. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 1.0 μg/m3 (1) 3.4 μg/m3 (14) 29.0
 
Sept. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 6.0 μg/m3 (5) 4.2 μg/m3 (18) 29.0
 
Sept. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 13.0 μg/m3 (12) 7.0 μg/m3 (29) 29.0
 
Sept. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 13.0 μg/m3 (12) 14.4 μg/m3 (55) 55.0
 
Sept. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 19.0 μg/m3 (17) 19.4 μg/m3 (66) 66.0
 
Sept. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 26.0 μg/m3 (24) 23.3 μg/m3 (74) 74.0
 
Sept. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 13.0 μg/m3 (12) 10.4 μg/m3 (43) 43.0
 
Sept. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 14.0 μg/m3 (13) 14.7 μg/m3 (56) 56.0
 
Sept. 18, 2019, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 14.0 μg/m3 (13) 11.8 μg/m3 (49) 49.0
 
Sept. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 12.0 μg/m3 (11) 13.1 μg/m3 (52) 52.0
 
Sept. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 17.0 μg/m3 (15) 11.6 μg/m3 (48) 48.0
 
Sept. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 14.0 μg/m3 (13) 10.6 μg/m3 (44) 44.0
 
Sept. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 18.0 μg/m3 (16) 9.5 μg/m3 (40) 40.0
 
Sept. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 21.0 μg/m3 (19) 12.5 μg/m3 (51) 51.0
 
Sept. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 17.0 μg/m3 (15) 7.9 μg/m3 (33) 33.0
 
Sept. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 17.0 μg/m3 (15) 5.3 μg/m3 (22) 22.0
 
Sept. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 13.0 μg/m3 (12) 4.7 μg/m3 (20) 21.0
 
Sept. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 21.0 μg/m3 (19) 4.6 μg/m3 (19) 22.0
 
Sept. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 39.0 μg/m3 (35) 4.7 μg/m3 (20) 35.0
 
Sept. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 32.0 μg/m3 (29) 6.2 μg/m3 (26) 29.0
 
Sept. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 30.0 μg/m3 (27) 12.4 μg/m3 (51) 51.0
 
Sept. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 27.0 μg/m3 (25) 3.2 μg/m3 (13) 34.0
 
Sept. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 31.0 μg/m3 (28) 0.5 μg/m3 (2) 35.0
 
Sept. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 25.0 μg/m3 (23) 5.3 μg/m3 (22) 32.0
 
Sept. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 24.0 μg/m3 (22) 6.3 μg/m3 (26) 32.0
 
Sept. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 23.0 μg/m3 (21) 1.2 μg/m3 (5) 35.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 22.0 μg/m3 (20) -1.1 μg/m3 (0) 32.0
 
Sept. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 20.0 μg/m3 (18) -1.3 μg/m3 (0) 29.0
 
Sept. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 16.0 μg/m3 (15) N/A 27.0
 
Sept. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 14.0 μg/m3 (13) -5.2 μg/m3 (0) 24.0
 
Sept. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 2.1 μg/m3 (9) 24.0
 
Sept. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 6.1 μg/m3 (25) 25.0
 
Sept. 17, 2019, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 9.2 μg/m3 (38) 38.0
 
Sept. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 15.0 μg/m3 (14) 14.4 μg/m3 (55) 55.0
 
Sept. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 20.0 μg/m3 (18) 20.6 μg/m3 (68) 68.0
 
Sept. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 21.0 μg/m3 (19) 15.1 μg/m3 (57) 57.0
 
Sept. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 20.0 μg/m3 (18) 7.6 μg/m3 (32) 32.0
 
Sept. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 19.0 μg/m3 (17) 11.8 μg/m3 (49) 49.0
 
Sept. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 16.0 μg/m3 (15) 5.4 μg/m3 (23) 24.0
 
Sept. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 20.0 μg/m3 (18) 11.9 μg/m3 (50) 50.0
 
Sept. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 24.0 μg/m3 (22) -1.2 μg/m3 (0) 29.0
 
Sept. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 26.0 μg/m3 (24) -3.7 μg/m3 (0) 28.0
 
Sept. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 22.0 μg/m3 (20) N/A 31.0
 
Sept. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 16.0 μg/m3 (15) N/A 32.0
 
Sept. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 20.0 μg/m3 (18) -1.1 μg/m3 (0) 36.0
 
Sept. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 19.0 μg/m3 (17) 10.8 μg/m3 (45) 45.0
 
Sept. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 21.0 μg/m3 (19) 9.6 μg/m3 (40) 40.0
 
Sept. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 19.0 μg/m3 (17) 14.1 μg/m3 (54) 54.0
 
Sept. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 19.0 μg/m3 (17) 23.7 μg/m3 (75) 75.0
 
Sept. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 24.0 μg/m3 (22) 14.1 μg/m3 (54) 54.0
 
Sept. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 14.0 μg/m3 (13) 4.0 μg/m3 (17) 29.0
 
Sept. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 16.0 μg/m3 (15) 0.2 μg/m3 (1) 29.0
 
Sept. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 9.0 μg/m3 (8) N/A 25.0
 
Sept. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 12.0 μg/m3 (11) -3.8 μg/m3 (0) 18.0
 
Sept. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 8.0 μg/m3 (7) 4.2 μg/m3 (18) 20.0
 
Sept. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 10.0 μg/m3 (9) 5.6 μg/m3 (23) 23.0
 
Sept. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 7.0 μg/m3 (6) 3.2 μg/m3 (13) 17.0
 
Sept. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 2.6 μg/m3 (11) 22.0
 
Sept. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 9.0 μg/m3 (8) 8.6 μg/m3 (36) 36.0
 
Sept. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 12.0 μg/m3 (11) 3.0 μg/m3 (12) 25.0
 
Sept. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 13.0 μg/m3 (12) N/A 25.0
 
Sept. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 2.9 μg/m3 (12) 29.0
 
Sept. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 13.0 μg/m3 (12) 12.9 μg/m3 (52) 52.0
 
Sept. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 19.0 μg/m3 (17) 10.1 μg/m3 (42) 42.0
 
Sept. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 21.0 μg/m3 (19) 3.7 μg/m3 (15) 27.0
 
Sept. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 20.0 μg/m3 (18) 3.1 μg/m3 (13) 28.0
 
Sept. 16, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 6.1 μg/m3 (25) 25.0
 
Sept. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 20.0 μg/m3 (18) 3.1 μg/m3 (13) 18.0
 
Sept. 15, 2019, 10 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) 6.5 μg/m3 (27) 34.0
 
Sept. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 26.0 μg/m3 (24) 7.9 μg/m3 (33) 33.0
 
Sept. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 22.0 μg/m3 (20) 13.0 μg/m3 (52) 52.0
 
Sept. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 6.0 μg/m3 (5) 11.2 μg/m3 (47) 47.0
 
Sept. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 14.0 μg/m3 (13) 3.2 μg/m3 (13) 28.0
 
Sept. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 5.3 μg/m3 (22) 26.0
 
Sept. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) -3.4 μg/m3 (0) 24.0
 
Sept. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) N/A 22.0
 
Sept. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) N/A 18.0
 
Sept. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) -1.2 μg/m3 (0) 20.0
 
Sept. 15, 2019, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) 6.3 μg/m3 (26) 26.0
 
Sept. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) -0.9 μg/m3 (0) 22.0
 
Sept. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 22.0
 
Sept. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 1.0 μg/m3 (1) 1.6 μg/m3 (7) 22.0
 
Sept. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 4.1 μg/m3 (17) 22.0
 
Sept. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 10.6 μg/m3 (44) 44.0
 
Sept. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 9.0 μg/m3 (8) 2.4 μg/m3 (10) 22.0
 
Sept. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) -1.3 μg/m3 (0) 21.0
 
Sept. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 27.0 μg/m3 (25) 2.1 μg/m3 (9) 25.0
 
Sept. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) 0.4 μg/m3 (2) 22.0
 
Sept. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 28.0 μg/m3 (25) 0.2 μg/m3 (1) 25.0