ID: 2421

AQSQID: 300750001

Site Name: Broadus

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

Updated: April 22, 2021, 11:44 a.m.

Location: Broadus (Big Powder Riv E Rd), MT

Reporting: True, Located: True

Current AQI: 32.0

Broadus (Big Powder Riv E Rd) MT, US: 45.440295, -105.37028

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 8.0 μg/m3 (8) 1.9 μg/m3 (8) 32.0
 
April 22, 2021, 9 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) 4.3 μg/m3 (18) 34.0
 
April 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 3.0 μg/m3 (3) 7.5 μg/m3 (32) 33.0
 
April 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 7.0 μg/m3 (7) 12.5 μg/m3 (52) 52.0
 
April 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 6.0 μg/m3 (6) 0.5 μg/m3 (3) 34.0
 
April 22, 2021, 5 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) 0.6 μg/m3 (3) 35.0
 
April 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 38.0
 
April 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 15.0 μg/m3 (14) -0.4 μg/m3 (0) 39.0
 
April 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 6.0 μg/m3 (6) 0.2 μg/m3 (1) 45.0
 
April 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 5.0 μg/m3 (5) -1.8 μg/m3 (0) 49.0
 
April 22, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 8.0 μg/m3 (8) 7.7 μg/m3 (33) 49.0
 
April 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 4.0 μg/m3 (4) 14.2 μg/m3 (56) 56.0
 
April 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 6.3 μg/m3 (27) 35.0
 
April 20, 2021, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 4.0 μg/m3 (4) 3.3 μg/m3 (14) 34.0
 
April 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) -0.9 μg/m3 (0) 35.0
 
April 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 7.0 μg/m3 (7) 0.0 μg/m3 (0) 37.0
 
April 20, 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) 3.8 μg/m3 (16) 37.0
 
April 20, 2021, 8 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) N/A 37.0
 
April 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 9.0 μg/m3 (9) N/A 37.0
 
April 20, 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) 2.2 μg/m3 (10) 37.0
 
April 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 4.0 μg/m3 (4) -2.7 μg/m3 (0) 38.0
 
April 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 3.0 μg/m3 (3) 3.4 μg/m3 (15) 37.0
 
April 20, 2021, 3 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) 4.4 μg/m3 (19) 36.0
 
April 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 5.0 μg/m3 (5) -0.9 μg/m3 (0) 34.0
 
April 20, 2021, 1 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) 4.0 μg/m3 (17) 36.0
 
April 20, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 4.0 μg/m3 (4) 3.7 μg/m3 (16) 37.0
 
April 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 7.0 μg/m3 (7) -1.6 μg/m3 (0) 38.0
 
April 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 2.0 μg/m3 (2) 1.3 μg/m3 (6) 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 3.0 μg/m3 (3) 2.9 μg/m3 (13) 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 5.0 μg/m3 (5) 5.5 μg/m3 (23) 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 6.0 μg/m3 (6) 0.5 μg/m3 (3) 40.0
 
April 19, 2021, 6 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) 4.8 μg/m3 (20) 39.0
 
April 19, 2021, 5 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) 5.7 μg/m3 (24) 38.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 4.8 μg/m3 (20) 35.0
 
April 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 9.0 μg/m3 (9) -1.0 μg/m3 (0) 33.0
 
April 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 5.0 μg/m3 (5) 2.1 μg/m3 (9) 34.0
 
April 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 8.0 μg/m3 (8) 5.5 μg/m3 (23) 35.0
 
April 19, 2021, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 1.8 μg/m3 (8) 35.0
 
April 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 35.0
 
April 19, 2021, 10 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) 3.2 μg/m3 (14) 37.0
 
April 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 4.0 μg/m3 (4) 2.9 μg/m3 (13) 38.0
 
April 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) 2.5 μg/m3 (11) 35.0
 
April 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 2.0 μg/m3 (2) 2.6 μg/m3 (11) 34.0
 
April 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) -0.9 μg/m3 (0) 35.0
 
April 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) 1.8 μg/m3 (8) 35.0
 
April 19, 2021, 4 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) 3.1 μg/m3 (13) 37.0
 
April 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 6.0 μg/m3 (6) 2.1 μg/m3 (9) 40.0
 
April 19, 2021, 2 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) 2.7 μg/m3 (12) 36.0
 
April 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 5.0 μg/m3 (5) -0.1 μg/m3 (0) 34.0
 
April 19, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.0 μg/m3 (2) 1.4 μg/m3 (6) 31.0
 
April 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 5.0 μg/m3 (5) -4.0 μg/m3 (0) 32.0
 
April 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 15.0 μg/m3 (14) -4.2 μg/m3 (0) 35.0
 
April 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 17.0 μg/m3 (16) 0.3 μg/m3 (2) 37.0
 
April 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 42.0 μg/m3 (39) 8.6 μg/m3 (36) 41.0
 
April 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 39.0 μg/m3 (37) 7.6 μg/m3 (32) 42.0
 
April 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 19.0 μg/m3 (18) 3.0 μg/m3 (13) 40.0
 
April 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 29.0 μg/m3 (27) 3.3 μg/m3 (14) 39.0
 
April 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 33.0 μg/m3 (31) 11.3 μg/m3 (48) 48.0
 
April 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 10.0 μg/m3 (10) 17.3 μg/m3 (62) 62.0
 
April 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 15.0 μg/m3 (14) 7.6 μg/m3 (32) 32.0
 
April 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 9.0 μg/m3 (9) 5.8 μg/m3 (25) 25.0
 
April 18, 2021, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 5.0 μg/m3 (5) 2.9 μg/m3 (13) 24.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 6.0 μg/m3 (6) 3.2 μg/m3 (14) 25.0
 
April 18, 2021, 10 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) 0.9 μg/m3 (4) 24.0
 
April 18, 2021, 9 a.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 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 4.0 μg/m3 (4) 7.7 μg/m3 (33) 33.0
 
April 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 0.0 μg/m3 (0) 3.6 μg/m3 (16) 18.0
 
April 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 1.0 μg/m3 (1) -2.0 μg/m3 (0) 18.0
 
April 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 0.1 μg/m3 (1) 23.0
 
April 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 1.8 μg/m3 (8) 33.0
 
April 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 21.0 μg/m3 (20) -1.2 μg/m3 (0) 31.0
 
April 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 64.0 μg/m3 (56) 1.4 μg/m3 (6) 56.0
 
April 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 19.0 μg/m3 (18) -1.3 μg/m3 (0) 39.0
 
April 18, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 19.0 μg/m3 (18) 3.8 μg/m3 (16) 42.0
 
April 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 17.0 μg/m3 (16) 0.0 μg/m3 (0) 43.0
 
April 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 12.0 μg/m3 (12) 3.5 μg/m3 (15) 44.0
 
April 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 9.0 μg/m3 (9) 0.9 μg/m3 (4) 45.0
 
April 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 4.0 μg/m3 (4) 4.9 μg/m3 (21) 45.0
 
April 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 4.0 μg/m3 (4) 1.1 μg/m3 (5) 45.0
 
April 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 7.0 μg/m3 (7) 0.9 μg/m3 (4) 44.0
 
April 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 9.0 μg/m3 (9) 8.8 μg/m3 (37) 43.0
 
April 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 11.0 μg/m3 (11) 12.4 μg/m3 (52) 52.0
 
April 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 14.0 μg/m3 (13) 14.6 μg/m3 (57) 57.0
 
April 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 9.0 μg/m3 (9) 6.6 μg/m3 (28) 28.0
 
April 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 12.0 μg/m3 (12) 9.3 μg/m3 (39) 39.0
 
April 17, 2021, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 8.0 μg/m3 (8) 2.5 μg/m3 (11) 14.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 10.0 μg/m3 (10) 7.0 μg/m3 (30) 30.0
 
April 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 11.0 μg/m3 (11) 2.0 μg/m3 (9) 13.0
 
April 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 10.0 μg/m3 (10) 4.9 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) 7.4 μg/m3 (31) 31.0
 
April 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 14.0 μg/m3 (13) 6.9 μg/m3 (29) 29.0
 
April 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 11.0 μg/m3 (11) 3.3 μg/m3 (14) 21.0
 
April 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 9.0 μg/m3 (9) 6.0 μg/m3 (25) 26.0
 
April 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 10.0 μg/m3 (10) 1.4 μg/m3 (6) 24.0
 
April 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 8.0 μg/m3 (8) 0.4 μg/m3 (2) 30.0
 
April 17, 2021, 2 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) -0.7 μg/m3 (0) 35.0
 
April 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 6.0 μg/m3 (6) 0.3 μg/m3 (2) 38.0
 
April 17, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 11.0 μg/m3 (11) 2.4 μg/m3 (10) 41.0
 
April 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 4.0 μg/m3 (4) -3.4 μg/m3 (0) 43.0
 
April 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 9.0 μg/m3 (9) 2.8 μg/m3 (12) 39.0
 
April 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 7.0 μg/m3 (7) 7.7 μg/m3 (33) 37.0
 
April 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 4.0 μg/m3 (4) 5.1 μg/m3 (22) 35.0
 
April 16, 2021, 7 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) 4.2 μg/m3 (18) 36.0
 
April 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) 3.2 μg/m3 (14) 35.0
 
April 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) 4.4 μg/m3 (19) 35.0
 
April 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) 10.9 μg/m3 (46) 46.0
 
April 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 10.0 μg/m3 (10) 13.9 μg/m3 (55) 55.0
 
April 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 5.0 μg/m3 (5) 4.1 μg/m3 (18) 28.0
 
April 16, 2021, 1 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) 5.8 μg/m3 (25) 25.0
 
April 16, 2021, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 6.0 μg/m3 (6) 1.5 μg/m3 (7) 25.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 3.0 μg/m3 (3) 5.3 μg/m3 (23) 25.0
 
April 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 25.0
 
April 16, 2021, 9 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) 0.0 μg/m3 (0) 25.0
 
April 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 7.0 μg/m3 (7) 6.3 μg/m3 (27) 27.0
 
April 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 10.0 μg/m3 (10) 9.8 μg/m3 (41) 41.0
 
April 16, 2021, 6 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) 0.7 μg/m3 (3) 27.0
 
April 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 8.0 μg/m3 (8) 2.3 μg/m3 (10) 27.0
 
April 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 5.0 μg/m3 (5) 0.8 μg/m3 (4) 29.0
 
April 16, 2021, 3 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) 3.2 μg/m3 (14) 31.0
 
April 16, 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) 4.8 μg/m3 (20) 31.0
 
April 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 4.0 μg/m3 (4) 3.9 μg/m3 (17) 33.0
 
April 16, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) 8.0 μg/m3 (34) 35.0
 
April 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 6.8 μg/m3 (29) 35.0
 
April 15, 2021, 10 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 15, 2021, 9 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) 2.9 μg/m3 (13) 33.0
 
April 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 32.0
 
April 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 5.0 μg/m3 (5) 2.3 μg/m3 (10) 30.0
 
April 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.0 μg/m3 (1) 7.5 μg/m3 (32) 32.0
 
April 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.0 μg/m3 (2) 7.1 μg/m3 (30) 31.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 7.0 μg/m3 (7) 8.1 μg/m3 (34) 34.0
 
April 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 15.0 μg/m3 (14) 14.0 μg/m3 (55) 55.0
 
April 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 12.0 μg/m3 (12) 10.8 μg/m3 (46) 46.0
 
April 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 30.0 μg/m3 (28) 14.0 μg/m3 (55) 55.0
 
April 15, 2021, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 21.0 μg/m3 (20) 5.0 μg/m3 (21) 22.0
 
April 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 15.0 μg/m3 (14) 5.7 μg/m3 (24) 24.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 16.0 μg/m3 (15) 5.3 μg/m3 (23) 24.0
 
April 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 9.0 μg/m3 (9) -2.7 μg/m3 (0) 22.0
 
April 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A -1.0 μg/m3 (0) 7.7 μg/m3 (33) 33.0
 
April 15, 2021, 7 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) 13.0 μg/m3 (53) 53.0
 
April 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 7.0 μg/m3 (7) 1.6 μg/m3 (7) 25.0
 
April 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 7.0 μg/m3 (7) -1.6 μg/m3 (0) 27.0
 
April 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (15) 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 5.0 μg/m3 (5) 1.9 μg/m3 (8) 31.0
 
April 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 21.0 μg/m3 (20) 3.1 μg/m3 (13) 32.0
 
April 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 24.0 μg/m3 (23) 4.1 μg/m3 (18) 32.0
 
April 15, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 53.0 μg/m3 (50) 4.4 μg/m3 (19) 50.0
 
April 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 37.0 μg/m3 (35) 2.7 μg/m3 (12) 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 28.0 μg/m3 (26) 0.2 μg/m3 (1) 35.0
 
April 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 26.0 μg/m3 (25) 5.7 μg/m3 (24) 36.0
 
April 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 20.0 μg/m3 (19) 2.8 μg/m3 (12) 37.0
 
April 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 21.0 μg/m3 (20) 2.4 μg/m3 (10) 37.0
 
April 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 15.0 μg/m3 (14) 2.5 μg/m3 (11) 38.0
 
April 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 9.0 μg/m3 (9) 6.0 μg/m3 (25) 36.0
 
April 14, 2021, 4 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) 2.4 μg/m3 (10) 35.0
 
April 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 22.0 μg/m3 (21) 0.7 μg/m3 (3) 34.0
 
April 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 33.0 μg/m3 (31) 2.8 μg/m3 (12) 33.0
 
April 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 13.0 μg/m3 (13) -0.4 μg/m3 (0) 34.0
 
April 14, 2021, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) 0.5 μg/m3 (3) 35.0
 
April 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 35.0
 
April 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 3.0 μg/m3 (3) 6.2 μg/m3 (26) 35.0
 
April 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 5.0 μg/m3 (5) 15.9 μg/m3 (59) 59.0
 
April 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -3.0 μg/m3 (0) 4.5 μg/m3 (19) 34.0
 
April 14, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A -4.0 μg/m3 (0) 0.6 μg/m3 (3) 32.0
 
April 14, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A -2.0 μg/m3 (0) 0.8 μg/m3 (4) 34.0
 
April 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 1.0 μg/m3 (1) -1.0 μg/m3 (0) 35.0
 
April 14, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) -1.2 μg/m3 (0) 35.0
 
April 14, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 4.0 μg/m3 (4) -0.9 μg/m3 (0) 35.0
 
April 14, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 4.0 μg/m3 (4) 3.9 μg/m3 (17) 35.0