ID: 2435

AQSQID: 300870001

Site Name: Birney

Added: April 21, 2020, 6:24 p.m.

Updated: April 20, 2021, 10:44 a.m.

Location: Birney (Tongue Riv Rd), MT

Reporting: True, Located: True

Current AQI: 39.0

Birney (Tongue Riv Rd) MT, US: 45.366151, -106.48982

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 13.0 μg/m3 (13) 3.1 μg/m3 (13) 39.0
 
April 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 14.0 μg/m3 (13) 1.1 μg/m3 (5) 40.0
 
April 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 9.0 μg/m3 (9) 0.6 μg/m3 (3) 41.0
 
April 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 7.0 μg/m3 (7) 7.6 μg/m3 (32) 39.0
 
April 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 7.0 μg/m3 (7) 2.3 μg/m3 (10) 38.0
 
April 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 9.0 μg/m3 (9) 1.8 μg/m3 (8) 38.0
 
April 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 3.0 μg/m3 (3) 0.2 μg/m3 (1) 38.0
 
April 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (15) 38.0
 
April 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 11.0 μg/m3 (11) -1.0 μg/m3 (0) 40.0
 
April 20, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 15.0 μg/m3 (14) N/A 39.0
 
April 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 5.0 μg/m3 (5) 1.3 μg/m3 (6) 39.0
 
April 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 1.0 μg/m3 (1) -0.6 μg/m3 (0) 39.0
 
April 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 4.0 μg/m3 (4) -0.8 μg/m3 (0) 39.0
 
April 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 4.0 μg/m3 (4) 2.4 μg/m3 (10) 40.0
 
April 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 11.0 μg/m3 (11) 6.2 μg/m3 (26) 40.0
 
April 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 8.0 μg/m3 (8) 0.9 μg/m3 (4) 41.0
 
April 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 7.0 μg/m3 (7) 1.3 μg/m3 (6) 39.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 4.0 μg/m3 (4) 3.2 μg/m3 (14) 37.0
 
April 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 1.0 μg/m3 (1) 0.5 μg/m3 (3) 36.0
 
April 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 0.0 μg/m3 (0) -0.8 μg/m3 (0) 36.0
 
April 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 8.0 μg/m3 (8) -4.1 μg/m3 (0) 33.0
 
April 19, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A -2.0 μg/m3 (0) 2.2 μg/m3 (10) 31.0
 
April 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 10.0 μg/m3 (10) 0.4 μg/m3 (2) 34.0
 
April 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 7.9 μg/m3 (33) 35.0
 
April 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 13.0 μg/m3 (13) 12.1 μg/m3 (51) 51.0
 
April 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 10.0 μg/m3 (10) 20.4 μg/m3 (69) 69.0
 
April 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -1.0 μg/m3 (0) -2.1 μg/m3 (0) 34.0
 
April 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 3.0 μg/m3 (3) N/A 36.0
 
April 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 3.0 μg/m3 (3) -0.1 μg/m3 (0) 40.0
 
April 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 9.0 μg/m3 (9) 6.3 μg/m3 (27) 47.0
 
April 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 4.0 μg/m3 (4) N/A 44.0
 
April 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 7.0 μg/m3 (7) 8.1 μg/m3 (34) 34.0
 
April 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 6.0 μg/m3 (6) 10.2 μg/m3 (43) 43.0
 
April 19, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 17.0 μg/m3 (16) 6.2 μg/m3 (26) 33.0
 
April 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 9.0 μg/m3 (9) 7.0 μg/m3 (30) 35.0
 
April 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 22.0 μg/m3 (21) 7.7 μg/m3 (33) 39.0
 
April 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 22.0 μg/m3 (21) 5.8 μg/m3 (25) 42.0
 
April 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 26.0 μg/m3 (25) 9.1 μg/m3 (38) 41.0
 
April 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 32.0 μg/m3 (30) 5.8 μg/m3 (25) 41.0
 
April 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 24.0 μg/m3 (23) 3.4 μg/m3 (15) 41.0
 
April 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 20.0 μg/m3 (19) 3.1 μg/m3 (13) 38.0
 
April 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 15.0 μg/m3 (14) -2.6 μg/m3 (0) 38.0
 
April 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 22.0 μg/m3 (21) -1.3 μg/m3 (0) 32.0
 
April 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 12.0 μg/m3 (12) -0.4 μg/m3 (0) 21.0
 
April 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 5.0 μg/m3 (5) 1.4 μg/m3 (6) 21.0
 
April 18, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 7.0 μg/m3 (7) 2.9 μg/m3 (13) 23.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 8.0 μg/m3 (8) 1.3 μg/m3 (6) 25.0
 
April 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 6.0 μg/m3 (6) 5.4 μg/m3 (23) 25.0
 
April 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 13.0 μg/m3 (13) 7.9 μg/m3 (33) 33.0
 
April 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 12.0 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 2.0 μg/m3 (2) 2.3 μg/m3 (10) 25.0
 
April 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 8.0 μg/m3 (8) 4.8 μg/m3 (20) 24.0
 
April 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 18.0 μg/m3 (17) 5.2 μg/m3 (22) 25.0
 
April 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 22.0 μg/m3 (21) 4.4 μg/m3 (19) 25.0
 
April 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 8.0 μg/m3 (8) 5.7 μg/m3 (24) 28.0
 
April 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 17.0 μg/m3 (16) 5.2 μg/m3 (22) 32.0
 
April 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 5.0 μg/m3 (5) 2.4 μg/m3 (10) 39.0
 
April 18, 2021, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 15.0 μg/m3 (14) 7.2 μg/m3 (31) 43.0
 
April 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 7.0 μg/m3 (7) 1.8 μg/m3 (8) 41.0
 
April 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A -2.0 μg/m3 (0) 1.3 μg/m3 (6) 42.0
 
April 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 11.0 μg/m3 (11) 1.5 μg/m3 (7) 41.0
 
April 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 5.0 μg/m3 (5) 2.2 μg/m3 (10) 43.0
 
April 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 4.0 μg/m3 (4) 3.8 μg/m3 (16) 44.0
 
April 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 3.0 μg/m3 (3) 3.3 μg/m3 (14) 43.0
 
April 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 10.0 μg/m3 (10) 5.6 μg/m3 (24) 43.0
 
April 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 0.0 μg/m3 (0) -1.7 μg/m3 (0) 38.0
 
April 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.0 μg/m3 (9) 26.0
 
April 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 0.0 μg/m3 (0) N/A 16.0
 
April 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 1.0 μg/m3 (1) N/A 14.0
 
April 17, 2021, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 14.0 μg/m3 (13) 7.3 μg/m3 (31) 31.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 8.0 μg/m3 (8) 8.6 μg/m3 (36) 36.0
 
April 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 11.0 μg/m3 (11) 5.3 μg/m3 (23) 23.0
 
April 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
April 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 1.6 μg/m3 (7) 17.0
 
April 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (13) 19.0
 
April 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 11.0 μg/m3 (11) 5.6 μg/m3 (24) 25.0
 
April 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 10.0 μg/m3 (10) 3.2 μg/m3 (14) 30.0
 
April 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 8.0 μg/m3 (8) 4.6 μg/m3 (20) 37.0
 
April 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 12.0 μg/m3 (12) 4.9 μg/m3 (21) 35.0
 
April 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 18.0 μg/m3 (17) 8.4 μg/m3 (36) 36.0
 
April 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 11.0 μg/m3 (11) 3.1 μg/m3 (13) 39.0
 
April 17, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 13.0 μg/m3 (13) 4.9 μg/m3 (21) 41.0
 
April 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 2.0 μg/m3 (2) 4.4 μg/m3 (19) 41.0
 
April 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 7.0 μg/m3 (7) 0.9 μg/m3 (4) 38.0
 
April 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) -2.4 μg/m3 (0) 35.0
 
April 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (2) 31.0
 
April 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 2.0 μg/m3 (2) 1.7 μg/m3 (8) 30.0
 
April 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 33.0
 
April 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 1.0 μg/m3 (1) 0.2 μg/m3 (1) 34.0
 
April 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.0 μg/m3 (0) N/A 31.0
 
April 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 6.0 μg/m3 (6) 2.5 μg/m3 (11) 25.0
 
April 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 9.0 μg/m3 (9) 2.2 μg/m3 (10) 24.0
 
April 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 16.0
 
April 16, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 4.0 μg/m3 (4) 4.1 μg/m3 (18) 18.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 7.0 μg/m3 (7) 1.9 μg/m3 (8) 17.0
 
April 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 4.0 μg/m3 (4) 4.3 μg/m3 (18) 20.0
 
April 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 4.0 μg/m3 (4) 5.8 μg/m3 (25) 25.0
 
April 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 8.0 μg/m3 (8) 7.7 μg/m3 (33) 33.0
 
April 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 0.0 μg/m3 (0) 4.5 μg/m3 (19) 21.0
 
April 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 1.0 μg/m3 (1) 3.7 μg/m3 (16) 19.0
 
April 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 9.0 μg/m3 (9) 4.4 μg/m3 (19) 21.0
 
April 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 10.0 μg/m3 (10) 5.8 μg/m3 (25) 25.0
 
April 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 1.0 μg/m3 (1) 3.4 μg/m3 (15) 25.0
 
April 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 6.0 μg/m3 (6) 6.1 μg/m3 (26) 26.0
 
April 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 7.0 μg/m3 (7) 8.1 μg/m3 (34) 34.0
 
April 16, 2021, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 3.0 μg/m3 (3) 8.3 μg/m3 (35) 35.0
 
April 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 11.1 μg/m3 (47) 47.0
 
April 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A -3.0 μg/m3 (0) 7.6 μg/m3 (32) 32.0
 
April 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 28.0
 
April 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 13.0 μg/m3 (13) N/A 29.0
 
April 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 37.0 μg/m3 (35) 24.1 μg/m3 (77) 77.0
 
April 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 6.0 μg/m3 (6) 6.5 μg/m3 (28) 28.0
 
April 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) 13.4 μg/m3 (54) 54.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A -2.0 μg/m3 (0) 15.5 μg/m3 (59) 59.0
 
April 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A -2.6 μg/m3 (0) 26.0
 
April 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 2.0 μg/m3 (2) 0.1 μg/m3 (1) 25.0
 
April 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 24.0
 
April 15, 2021, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 2.0 μg/m3 (2) 4.5 μg/m3 (19) 23.0
 
April 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 2.0 μg/m3 (2) 1.9 μg/m3 (8) 24.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) 2.8 μg/m3 (12) 25.0
 
April 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 6.0 μg/m3 (6) 3.7 μg/m3 (16) 25.0
 
April 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) 1.0 μg/m3 (5) 26.0
 
April 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 27.0
 
April 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 3.0 μg/m3 (3) 2.8 μg/m3 (12) 27.0
 
April 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 3.0 μg/m3 (3) 0.6 μg/m3 (3) 29.0
 
April 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 1.0 μg/m3 (1) 1.4 μg/m3 (6) 30.0
 
April 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.0 μg/m3 (1) 6.6 μg/m3 (28) 31.0
 
April 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 6.0 μg/m3 (6) 1.1 μg/m3 (5) 31.0
 
April 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 4.0 μg/m3 (4) 1.1 μg/m3 (5) 34.0
 
April 15, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 17.0 μg/m3 (16) 4.0 μg/m3 (17) 34.0
 
April 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 29.0 μg/m3 (27) 6.6 μg/m3 (28) 35.0
 
April 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 19.0 μg/m3 (18) 4.6 μg/m3 (20) 35.0
 
April 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 6.0 μg/m3 (6) 0.9 μg/m3 (4) 35.0
 
April 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 6.0 μg/m3 (6) 0.2 μg/m3 (1) 34.0
 
April 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 20.0 μg/m3 (19) 2.9 μg/m3 (13) 32.0
 
April 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 24.0 μg/m3 (23) 1.9 μg/m3 (8) 32.0
 
April 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 7.0 μg/m3 (7) 1.2 μg/m3 (5) 32.0
 
April 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 2.0 μg/m3 (2) 6.2 μg/m3 (26) 33.0
 
April 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.9 μg/m3 (13) 34.0
 
April 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) 2.3 μg/m3 (10) 35.0
 
April 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 4.0 μg/m3 (4) -1.7 μg/m3 (0) 36.0
 
April 14, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 2.0 μg/m3 (2) 4.2 μg/m3 (18) 36.0
 
April 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 1.0 μg/m3 (1) -0.9 μg/m3 (0) 36.0
 
April 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 1.0 μg/m3 (1) 1.5 μg/m3 (7) 36.0
 
April 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 37.0
 
April 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 10.0 μg/m3 (10) 0.0 μg/m3 (0) 37.0
 
April 14, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 17.0 μg/m3 (16) 2.3 μg/m3 (10) 36.0
 
April 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 1.0 μg/m3 (1) 1.1 μg/m3 (5) 37.0
 
April 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -1.0 μg/m3 (0) 3.3 μg/m3 (14) 37.0
 
April 14, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 6.0 μg/m3 (6) 0.0 μg/m3 (0) 37.0
 
April 14, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 0.0 μg/m3 (0) 3.3 μg/m3 (14) 38.0
 
April 14, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 3.0 μg/m3 (3) 3.6 μg/m3 (16) 38.0
 
April 14, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 5.0 μg/m3 (5) 6.2 μg/m3 (26) 37.0
 
April 14, 2021, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 0.0 μg/m3 (0) 4.2 μg/m3 (18) 38.0
 
April 13, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 6.0 μg/m3 (6) 1.2 μg/m3 (5) 39.0
 
April 13, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 6.0 μg/m3 (6) 1.4 μg/m3 (6) 40.0
 
April 13, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 3.0 μg/m3 (3) -1.3 μg/m3 (0) 40.0
 
April 13, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A N/A 41.0
 
April 13, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 3.0 μg/m3 (3) -2.8 μg/m3 (0) 40.0
 
April 13, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 0.0 μg/m3 (0) -1.2 μg/m3 (0) 41.0
 
April 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 40.0
 
April 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 3.0 μg/m3 (3) N/A 39.0
 
April 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 3.0 μg/m3 (3) -2.5 μg/m3 (0) 38.0
 
April 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 1.0 μg/m3 (1) 0.8 μg/m3 (4) 38.0
 
April 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 4.0 μg/m3 (4) 7.5 μg/m3 (32) 38.0
 
April 13, 2021, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 7.0 μg/m3 (7) 4.3 μg/m3 (18) 41.0
 
April 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 7.0 μg/m3 (7) 3.1 μg/m3 (13) 39.0
 
April 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 6.0 μg/m3 (6) 1.4 μg/m3 (6) 39.0