AQSQID: 300750001

Site Name: Broadus

Location: Powder River Co, MT

Reporting: True, Located: True

Current AQI: 29.0

Powder River Co MT, US: 45.440295, -105.37028

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 26, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 10.0 μg/m3 (9) 6.1 μg/m3 (25) 29.0
 
March 26, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 15.0 μg/m3 (14) 12.1 μg/m3 (50) 50.0
 
March 26, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 18.0 μg/m3 (16) 5.1 μg/m3 (21) 22.0
 
March 26, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 8.0 μg/m3 (7) 8.2 μg/m3 (34) 34.0
 
March 26, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 8.4 μg/m3 (35) 35.0
 
March 26, 2019, 2 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) 3.7 μg/m3 (15) 16.0
 
March 26, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 19.0
 
March 26, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 5.2 μg/m3 (22) 22.0
 
March 26, 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) 6.5 μg/m3 (27) 27.0
 
March 26, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 26, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 15.0 μg/m3 (14) 10.2 μg/m3 (42) 42.0
 
March 26, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 13.0 μg/m3 (12) -4.0 μg/m3 (0) 14.0
 
March 26, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) N/A 15.0
 
March 26, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 7.0 μg/m3 (6) 6.1 μg/m3 (25) 25.0
 
March 26, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 7.0 μg/m3 (29) 29.0
 
March 26, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 5.0 μg/m3 (5) -0.7 μg/m3 (0) 14.0
 
March 26, 2019, 3 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) 7.0 μg/m3 (29) 29.0
 
March 26, 2019, 2 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) -1.5 μg/m3 (0) 18.0
 
March 26, 2019, 1 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) -0.4 μg/m3 (0) 20.0
 
March 26, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 11.9 μg/m3 (50) 50.0
 
March 25, 2019, 11 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) 13.7 μg/m3 (54) 54.0
 
March 25, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 5.0 μg/m3 (5) 4.9 μg/m3 (20) 25.0
 
March 25, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) 4.4 μg/m3 (18) 22.0
 
March 25, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 19.0
 
March 25, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 7.0 μg/m3 (6) 11.0 μg/m3 (46) 46.0
 
March 25, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 11.0 μg/m3 (10) 13.6 μg/m3 (53) 53.0
 
March 25, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 12.0 μg/m3 (11) 17.2 μg/m3 (61) 61.0
 
March 25, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 3.6 μg/m3 (15) 15.0
 
March 25, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 14.0 μg/m3 (13) -3.6 μg/m3 (0) 15.0
 
March 25, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 4.7 μg/m3 (20) 20.0
 
March 25, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 3.6 μg/m3 (15) 15.0
 
March 25, 2019, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 3.0 μg/m3 (3) 3.2 μg/m3 (13) 15.0
 
March 25, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 15.0
 
March 25, 2019, 10 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) 7.3 μg/m3 (30) 30.0
 
March 25, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) -0.3 μg/m3 (0) 18.0
 
March 25, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 9.0 μg/m3 (8) -1.3 μg/m3 (0) 20.0
 
March 25, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 16.0 μg/m3 (15) -4.1 μg/m3 (0) 22.0
 
March 25, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 11.0 μg/m3 (10) 12.2 μg/m3 (50) 50.0
 
March 25, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 10.0 μg/m3 (9) 7.8 μg/m3 (32) 32.0
 
March 25, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 11.0 μg/m3 (10) 7.4 μg/m3 (31) 31.0
 
March 25, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 14.0 μg/m3 (13) 7.3 μg/m3 (30) 30.0
 
March 25, 2019, 2 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) 15.1 μg/m3 (57) 57.0
 
March 25, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 17.0 μg/m3 (15) 8.6 μg/m3 (36) 36.0
 
March 25, 2019, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 17.0 μg/m3 (15) 15.7 μg/m3 (58) 58.0
 
March 24, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 9.0 μg/m3 (8) 14.3 μg/m3 (55) 55.0
 
March 24, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 11.0 μg/m3 (10) 6.6 μg/m3 (28) 28.0
 
March 24, 2019, 9 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) 16.3 μg/m3 (59) 59.0
 
March 24, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 19.0 μg/m3 (17) 9.9 μg/m3 (41) 41.0
 
March 24, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 12.0 μg/m3 (11) 13.7 μg/m3 (54) 54.0
 
March 24, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 10.0 μg/m3 (9) 9.9 μg/m3 (41) 41.0
 
March 24, 2019, 5 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) 16.0 μg/m3 (59) 59.0
 
March 24, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 4.4 μg/m3 (18) 21.0
 
March 24, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 2.9 μg/m3 (12) 17.0
 
March 24, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 14.0
 
March 24, 2019, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 8.2 μg/m3 (34) 34.0
 
March 24, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 9.0 μg/m3 (8) 2.4 μg/m3 (10) 12.0
 
March 24, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 9.0 μg/m3 (8) 6.3 μg/m3 (26) 26.0
 
March 24, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 7.6 μg/m3 (32) 32.0
 
March 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 18.0 μg/m3 (16) 8.7 μg/m3 (36) 36.0
 
March 24, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 11.0 μg/m3 (10) 3.7 μg/m3 (15) 18.0
 
March 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 11.0 μg/m3 (10) 5.8 μg/m3 (24) 24.0
 
March 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 23.0 μg/m3 (21) 10.6 μg/m3 (44) 44.0
 
March 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 18.0 μg/m3 (16) 6.2 μg/m3 (26) 26.0
 
March 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 10.0 μg/m3 (9) 3.6 μg/m3 (15) 20.0
 
March 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 22.0 μg/m3 (20) 5.9 μg/m3 (25) 25.0
 
March 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 26.0 μg/m3 (24) 4.8 μg/m3 (20) 27.0
 
March 24, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 48.0 μg/m3 (44) 11.8 μg/m3 (49) 49.0
 
March 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 3.0 μg/m3 (3) N/A 32.0
 
March 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 4.7 μg/m3 (20) 32.0
 
March 23, 2019, 9 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) 3.8 μg/m3 (16) 34.0
 
March 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 8.0 μg/m3 (7) 5.2 μg/m3 (22) 33.0
 
March 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 12.0 μg/m3 (11) 1.7 μg/m3 (7) 30.0
 
March 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 15.0 μg/m3 (14) 8.4 μg/m3 (35) 35.0
 
March 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 15.0 μg/m3 (14) 12.4 μg/m3 (51) 51.0
 
March 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 14.0 μg/m3 (13) 15.1 μg/m3 (57) 57.0
 
March 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 12.0 μg/m3 (11) 5.9 μg/m3 (25) 25.0
 
March 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 10.7 μg/m3 (45) 45.0
 
March 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 8.4 μg/m3 (35) 35.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 4.6 μg/m3 (19) 22.0
 
March 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 10.0 μg/m3 (9) 14.6 μg/m3 (56) 56.0
 
March 23, 2019, 10 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) 3.4 μg/m3 (14) 19.0
 
March 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 7.0 μg/m3 (6) 2.7 μg/m3 (11) 19.0
 
March 23, 2019, 8 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) 18.8 μg/m3 (64) 64.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A -1.0 μg/m3 (0) 10.5 μg/m3 (44) 44.0
 
March 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 3.0 μg/m3 (3) 3.5 μg/m3 (15) 27.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) -2.1 μg/m3 (0) 30.0
 
March 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 13.0 μg/m3 (12) 4.3 μg/m3 (18) 28.0
 
March 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 24.0 μg/m3 (22) 4.2 μg/m3 (18) 28.0
 
March 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 28.0
 
March 23, 2019, 1 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) 5.9 μg/m3 (25) 25.0
 
March 23, 2019, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 24.0 μg/m3 (22) 6.4 μg/m3 (27) 27.0
 
March 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 15.0 μg/m3 (14) 7.2 μg/m3 (30) 30.0
 
March 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 41.0 μg/m3 (37) 7.5 μg/m3 (31) 37.0
 
March 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 54.0 μg/m3 (49) 9.5 μg/m3 (40) 49.0
 
March 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 62.0 μg/m3 (54) 12.1 μg/m3 (50) 54.0
 
March 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 9.0 μg/m3 (8) 4.1 μg/m3 (17) 35.0
 
March 22, 2019, 6 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) 8.5 μg/m3 (35) 35.0
 
March 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 74.0 μg/m3 (60) 13.0 μg/m3 (52) 60.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 49.0 μg/m3 (45) 20.2 μg/m3 (67) 67.0
 
March 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 23.0 μg/m3 (21) 21.2 μg/m3 (70) 70.0
 
March 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 21.0 μg/m3 (19) 10.1 μg/m3 (42) 42.0
 
March 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 14.0 μg/m3 (13) 2.9 μg/m3 (12) 25.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 3.3 μg/m3 (14) 25.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 8.0 μg/m3 (7) 1.6 μg/m3 (7) 25.0
 
March 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) -0.1 μg/m3 (0) 28.0
 
March 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 5.0 μg/m3 (5) 8.6 μg/m3 (36) 36.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 6.0 μg/m3 (5) 10.1 μg/m3 (42) 42.0
 
March 22, 2019, 7 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) -2.7 μg/m3 (0) 35.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 2.0 μg/m3 (2) 3.7 μg/m3 (15) 36.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 4.0 μg/m3 (4) 1.1 μg/m3 (5) 35.0
 
March 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 39.0
 
March 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 10.0 μg/m3 (9) -0.2 μg/m3 (0) 39.0
 
March 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 17.0 μg/m3 (15) -1.7 μg/m3 (0) 39.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 4.0 μg/m3 (4) 1.5 μg/m3 (6) 42.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 3.0 μg/m3 (3) 4.8 μg/m3 (20) 42.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 21.0 μg/m3 (19) 11.1 μg/m3 (46) 46.0
 
March 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A 43.0 μg/m3 (39) 9.4 μg/m3 (39) 45.0
 
March 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 69.0 μg/m3 (57) 13.7 μg/m3 (54) 57.0
 
March 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 28.0 μg/m3 (25) 8.6 μg/m3 (36) 45.0
 
March 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 13.0 μg/m3 (12) 7.8 μg/m3 (32) 41.0
 
March 21, 2019, 6 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) -1.2 μg/m3 (0) 35.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 14.0 μg/m3 (13) 8.3 μg/m3 (35) 35.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 22.0 μg/m3 (20) 21.0 μg/m3 (69) 69.0
 
March 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 30.0 μg/m3 (27) 43.3 μg/m3 (120) 120.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 21.0 μg/m3 (19) 16.9 μg/m3 (60) 60.0
 
March 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) 7.7 μg/m3 (32) 32.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 6.2 μg/m3 (26) 26.0
 
March 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 24.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 25.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 4.1 μg/m3 (17) 26.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 2.3 μg/m3 (10) 28.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 5.0 μg/m3 (5) -3.0 μg/m3 (0) 29.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 12.0 μg/m3 (11) 7.1 μg/m3 (30) 32.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 13.0 μg/m3 (12) 0.8 μg/m3 (3) 33.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 12.0 μg/m3 (11) 2.7 μg/m3 (11) 34.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 20.0 μg/m3 (18) -0.1 μg/m3 (0) 35.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 5.0 μg/m3 (5) N/A 40.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 0.0 μg/m3 (0) -0.9 μg/m3 (0) 44.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 0.0 μg/m3 (0) 6.1 μg/m3 (25) 44.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A 2.0 μg/m3 (2) 18.6 μg/m3 (64) 64.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A 7.0 μg/m3 (6) 0.8 μg/m3 (3) 48.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) N/A 1.0 μg/m3 (1) 2.3 μg/m3 (10) 49.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A 3.0 μg/m3 (3) 2.9 μg/m3 (12) 48.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A 10.0 μg/m3 (9) 2.6 μg/m3 (11) 47.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 44.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 13.0 μg/m3 (12) 7.3 μg/m3 (30) 42.0
 
March 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 14.0 μg/m3 (13) 12.5 μg/m3 (51) 51.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 22.0 μg/m3 (20) 17.0 μg/m3 (61) 61.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 10.0 μg/m3 (9) 6.9 μg/m3 (29) 35.0
 
March 20, 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) 4.3 μg/m3 (18) 36.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 6.0 μg/m3 (5) -2.7 μg/m3 (0) 38.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 40.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 38.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 0.0 μg/m3 (0) 9.4 μg/m3 (39) 39.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 3.0 μg/m3 (3) 6.0 μg/m3 (25) 34.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 6.0 μg/m3 (5) 2.9 μg/m3 (12) 33.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 9.0 μg/m3 (8) 2.7 μg/m3 (11) 35.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 11.0 μg/m3 (10) 5.6 μg/m3 (23) 35.0
 
March 20, 2019, 3 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) 4.5 μg/m3 (19) 37.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 9.0 μg/m3 (8) 1.1 μg/m3 (5) 40.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A 7.0 μg/m3 (6) 4.3 μg/m3 (18) 40.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 42.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 7.0 μg/m3 (6) 2.8 μg/m3 (12) 42.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A 8.0 μg/m3 (7) 2.6 μg/m3 (11) 44.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A 18.0 μg/m3 (16) 7.6 μg/m3 (32) 45.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A 11.0 μg/m3 (10) 0.0 μg/m3 (0) 42.0