ID: 2424

AQSQID: 300270006

Site Name: Lewistown

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

Updated: April 20, 2021, 8:44 a.m.

Location: Lewistown (E Aztec Dr), MT

Reporting: True, Located: True

Current AQI: 38.0

Lewistown (E Aztec Dr) MT, US: 47.048537, -109.455315

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 20, 2021, 7 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) -3.9 μg/m3 (0) 38.0
 
April 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 37.0
 
April 20, 2021, 5 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) 0.9 μg/m3 (4) 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 4.0 μg/m3 (4) 3.5 μg/m3 (15) 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 8.0 μg/m3 (8) 3.1 μg/m3 (13) 38.0
 
April 20, 2021, 2 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) 4.8 μg/m3 (20) 39.0
 
April 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 10.0 μg/m3 (10) 4.8 μg/m3 (20) 40.0
 
April 20, 2021, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 18.0 μg/m3 (17) 5.7 μg/m3 (24) 41.0
 
April 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 14.0 μg/m3 (13) 2.6 μg/m3 (11) 42.0
 
April 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 0.0 μg/m3 (0) 3.7 μg/m3 (16) 43.0
 
April 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 10.0 μg/m3 (10) 6.1 μg/m3 (26) 42.0
 
April 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 13.0 μg/m3 (13) 1.6 μg/m3 (7) 42.0
 
April 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 16.0 μg/m3 (15) 8.5 μg/m3 (36) 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 9.0 μg/m3 (9) 3.4 μg/m3 (15) 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 5.0 μg/m3 (5) 0.6 μg/m3 (3) 38.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 6.0 μg/m3 (6) 6.1 μg/m3 (26) 37.0
 
April 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 6.1 μg/m3 (26) 26.0
 
April 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 2.3 μg/m3 (10) 10.0
 
April 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 1.9 μg/m3 (8) 8.0
 
April 19, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 0.1 μg/m3 (1) 5.0
 
April 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 2.0 μg/m3 (2) 4.9 μg/m3 (21) 35.0
 
April 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 1.0 μg/m3 (1) 2.1 μg/m3 (9) 38.0
 
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) 0.0 μg/m3 (0) 38.0
 
April 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 5.0 μg/m3 (5) 2.5 μg/m3 (11) 38.0
 
April 19, 2021, 7 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) 5.6 μg/m3 (24) 37.0
 
April 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 5.0 μg/m3 (5) -1.4 μg/m3 (0) 38.0
 
April 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 8.0 μg/m3 (8) 0.4 μg/m3 (2) 39.0
 
April 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 8.0 μg/m3 (8) 3.5 μg/m3 (15) 40.0
 
April 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 7.0 μg/m3 (7) -1.2 μg/m3 (0) 42.0
 
April 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 14.0 μg/m3 (13) 3.2 μg/m3 (14) 37.0
 
April 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 9.0 μg/m3 (9) 0.0 μg/m3 (0) 32.0
 
April 19, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 10.0 μg/m3 (10) 2.3 μg/m3 (10) 32.0
 
April 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 17.0 μg/m3 (16) 10.9 μg/m3 (46) 46.0
 
April 18, 2021, 10 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) 5.5 μg/m3 (23) 33.0
 
April 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 14.0 μg/m3 (13) 2.3 μg/m3 (10) 36.0
 
April 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 13.0 μg/m3 (13) 6.0 μg/m3 (25) 37.0
 
April 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 11.0 μg/m3 (11) 5.2 μg/m3 (22) 39.0
 
April 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 14.0 μg/m3 (13) 3.2 μg/m3 (14) 39.0
 
April 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 22.0 μg/m3 (21) 6.6 μg/m3 (28) 39.0
 
April 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 18.0 μg/m3 (17) 7.7 μg/m3 (33) 46.0
 
April 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 16.0 μg/m3 (15) 11.1 μg/m3 (47) 47.0
 
April 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 11.0 μg/m3 (11) 9.7 μg/m3 (41) 41.0
 
April 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 9.0 μg/m3 (9) 5.1 μg/m3 (22) 34.0
 
April 18, 2021, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 13.0 μg/m3 (13) 4.8 μg/m3 (20) 31.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 11.0 μg/m3 (11) 9.6 μg/m3 (40) 40.0
 
April 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 18.0 μg/m3 (17) 10.2 μg/m3 (43) 43.0
 
April 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 15.0 μg/m3 (14) 2.1 μg/m3 (9) 34.0
 
April 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 15.0 μg/m3 (14) 8.1 μg/m3 (34) 35.0
 
April 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 12.0 μg/m3 (12) 5.9 μg/m3 (25) 38.0
 
April 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 13.0 μg/m3 (13) 6.3 μg/m3 (27) 34.0
 
April 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 12.0 μg/m3 (12) 3.9 μg/m3 (17) 37.0
 
April 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 16.0 μg/m3 (15) 6.4 μg/m3 (27) 36.0
 
April 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 20.0 μg/m3 (19) 5.6 μg/m3 (24) 36.0
 
April 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 21.0 μg/m3 (20) 5.3 μg/m3 (23) 40.0
 
April 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A 15.0 μg/m3 (14) 6.2 μg/m3 (26) 51.0
 
April 18, 2021, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A 17.0 μg/m3 (16) 2.9 μg/m3 (13) 55.0
 
April 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A 16.0 μg/m3 (15) 7.9 μg/m3 (33) 55.0
 
April 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 8.0 μg/m3 (8) 3.4 μg/m3 (15) 50.0
 
April 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 9.0 μg/m3 (9) 0.2 μg/m3 (1) 49.0
 
April 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 7.0 μg/m3 (7) 5.5 μg/m3 (23) 48.0
 
April 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 2.0 μg/m3 (2) 4.9 μg/m3 (21) 49.0
 
April 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 6.0 μg/m3 (6) 3.9 μg/m3 (17) 49.0
 
April 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 10.0 μg/m3 (10) 2.3 μg/m3 (10) 49.0
 
April 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 7.0 μg/m3 (7) 7.4 μg/m3 (31) 48.0
 
April 17, 2021, 3 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) 4.7 μg/m3 (20) 43.0
 
April 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 2.0 μg/m3 (2) 10.0 μg/m3 (42) 42.0
 
April 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 7.0 μg/m3 (7) 5.1 μg/m3 (22) 30.0
 
April 17, 2021, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 9.0 μg/m3 (9) 4.9 μg/m3 (21) 29.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 10.0 μg/m3 (10) 6.6 μg/m3 (28) 31.0
 
April 17, 2021, 10 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) 4.1 μg/m3 (18) 30.0
 
April 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 11.0 μg/m3 (11) 7.6 μg/m3 (32) 32.0
 
April 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 12.0 μg/m3 (12) 9.0 μg/m3 (38) 38.0
 
April 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 16.0 μg/m3 (15) 11.5 μg/m3 (48) 48.0
 
April 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 12.0 μg/m3 (12) 5.7 μg/m3 (24) 27.0
 
April 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 19.0 μg/m3 (18) 6.6 μg/m3 (28) 30.0
 
April 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 17.0 μg/m3 (16) 6.9 μg/m3 (29) 35.0
 
April 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 16.0 μg/m3 (15) 5.5 μg/m3 (23) 38.0
 
April 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 12.0 μg/m3 (12) 4.8 μg/m3 (20) 39.0
 
April 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 13.0 μg/m3 (13) 6.2 μg/m3 (26) 45.0
 
April 17, 2021, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 15.0 μg/m3 (14) 8.7 μg/m3 (37) 48.0
 
April 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 20.0 μg/m3 (19) 10.2 μg/m3 (43) 48.0
 
April 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 8.0 μg/m3 (8) 7.3 μg/m3 (31) 48.0
 
April 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 12.0 μg/m3 (12) 2.8 μg/m3 (12) 48.0
 
April 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 10.0 μg/m3 (10) 1.4 μg/m3 (6) 49.0
 
April 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 6.0 μg/m3 (6) 5.6 μg/m3 (24) 46.0
 
April 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 1.0 μg/m3 (1) 2.2 μg/m3 (10) 44.0
 
April 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 3.0 μg/m3 (3) 1.9 μg/m3 (8) 41.0
 
April 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 5.0 μg/m3 (5) -1.8 μg/m3 (0) 38.0
 
April 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 3.0 μg/m3 (3) -3.3 μg/m3 (0) 36.0
 
April 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A -2.0 μg/m3 (0) -0.5 μg/m3 (0) 31.0
 
April 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 0.6 μg/m3 (3) 24.0
 
April 16, 2021, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 3.7 μg/m3 (16) 24.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 3.0 μg/m3 (3) 1.6 μg/m3 (7) 26.0
 
April 16, 2021, 10 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) 6.3 μg/m3 (27) 27.0
 
April 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 25.0
 
April 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 0.0 μg/m3 (0) 0.2 μg/m3 (1) 24.0
 
April 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 2.0 μg/m3 (2) -2.4 μg/m3 (0) 25.0
 
April 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 3.0 μg/m3 (3) 6.6 μg/m3 (28) 28.0
 
April 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 2.0 μg/m3 (2) 2.9 μg/m3 (13) 27.0
 
April 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 30.0
 
April 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 30.0
 
April 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 6.0 μg/m3 (6) 1.8 μg/m3 (8) 35.0
 
April 16, 2021, 1 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) 1.0 μg/m3 (5) 38.0
 
April 16, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 7.0 μg/m3 (7) -1.5 μg/m3 (0) 39.0
 
April 15, 2021, 11 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) -4.1 μg/m3 (0) 38.0
 
April 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 0.0 μg/m3 (0) 2.9 μg/m3 (13) 37.0
 
April 15, 2021, 9 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) 0.7 μg/m3 (3) 36.0
 
April 15, 2021, 8 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) 0.8 μg/m3 (4) 36.0
 
April 15, 2021, 7 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) 0.6 μg/m3 (3) 35.0
 
April 15, 2021, 6 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) 4.4 μg/m3 (19) 35.0
 
April 15, 2021, 5 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) 3.6 μg/m3 (16) 35.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) 2.1 μg/m3 (9) 35.0
 
April 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 38.0 μg/m3 (36) 1.5 μg/m3 (7) 36.0
 
April 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A N/A 32.0
 
April 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 1.0 μg/m3 (1) 1.6 μg/m3 (7) 32.0
 
April 15, 2021, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 4.0 μg/m3 (4) 0.2 μg/m3 (1) 32.0
 
April 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 2.0 μg/m3 (2) 2.6 μg/m3 (11) 32.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 0.0 μg/m3 (0) -0.9 μg/m3 (0) 33.0
 
April 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 4.0 μg/m3 (4) -2.0 μg/m3 (0) 32.0
 
April 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 3.0 μg/m3 (3) 3.1 μg/m3 (13) 31.0
 
April 15, 2021, 7 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) 4.5 μg/m3 (19) 31.0
 
April 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 1.0 μg/m3 (1) 2.4 μg/m3 (10) 32.0
 
April 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 4.0 μg/m3 (4) -2.2 μg/m3 (0) 32.0
 
April 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 2.0 μg/m3 (2) 2.1 μg/m3 (9) 33.0
 
April 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 1.0 μg/m3 (1) 1.1 μg/m3 (5) 34.0
 
April 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 35.0
 
April 15, 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) -1.4 μg/m3 (0) 36.0
 
April 15, 2021, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 3.0 μg/m3 (3) -1.0 μg/m3 (0) 36.0
 
April 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -1.0 μg/m3 (0) -1.4 μg/m3 (0) 37.0
 
April 14, 2021, 10 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) 1.2 μg/m3 (5) 38.0
 
April 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 1.0 μg/m3 (1) -1.9 μg/m3 (0) 38.0
 
April 14, 2021, 8 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) 3.1 μg/m3 (13) 38.0
 
April 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 1.0 μg/m3 (1) 2.9 μg/m3 (13) 38.0
 
April 14, 2021, 6 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) 1.4 μg/m3 (6) 38.0
 
April 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A -3.0 μg/m3 (0) 2.5 μg/m3 (11) 39.0
 
April 14, 2021, 4 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) 11.3 μg/m3 (48) 48.0
 
April 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A -3.0 μg/m3 (0) 5.2 μg/m3 (22) 38.0
 
April 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 0.0 μg/m3 (0) -1.0 μg/m3 (0) 37.0
 
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) 2.7 μg/m3 (12) 36.0
 
April 14, 2021, noon 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, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 2.0 μg/m3 (2) 4.8 μg/m3 (20) 36.0
 
April 14, 2021, 10 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) -0.5 μg/m3 (0) 37.0
 
April 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 1.0 μg/m3 (1) 4.7 μg/m3 (20) 37.0
 
April 14, 2021, 8 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) 2.3 μg/m3 (10) 36.0
 
April 14, 2021, 7 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) -0.1 μg/m3 (0) 35.0
 
April 14, 2021, 6 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) -1.3 μg/m3 (0) 36.0
 
April 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 4.0 μg/m3 (4) 1.9 μg/m3 (8) 37.0
 
April 14, 2021, 4 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) 3.3 μg/m3 (14) 38.0
 
April 14, 2021, 3 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) 0.6 μg/m3 (3) 37.0
 
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) -0.7 μg/m3 (0) 38.0
 
April 14, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 6.0 μg/m3 (6) 3.6 μg/m3 (16) 38.0
 
April 14, 2021, midnight N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 8.0 μg/m3 (8) -0.8 μg/m3 (0) 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 2.0 μg/m3 (2) -2.5 μg/m3 (0) 39.0
 
April 13, 2021, 10 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) 2.2 μg/m3 (10) 39.0
 
April 13, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 9.0 μg/m3 (9) 0.0 μg/m3 (0) 40.0
 
April 13, 2021, 8 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) 1.1 μg/m3 (5) 39.0
 
April 13, 2021, 7 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) 2.7 μg/m3 (12) 39.0
 
April 13, 2021, 6 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) 6.6 μg/m3 (28) 39.0
 
April 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 40.0
 
April 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 8.0 μg/m3 (8) 4.2 μg/m3 (18) 40.0
 
April 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 8.0 μg/m3 (8) 15.6 μg/m3 (59) 59.0
 
April 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 0.0 μg/m3 (0) 4.6 μg/m3 (20) 37.0
 
April 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 35.0
 
April 13, 2021, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 2.0 μg/m3 (2) -2.1 μg/m3 (0) 30.0
 
April 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (8) 32.0
 
April 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 2.0 μg/m3 (2) 1.1 μg/m3 (5) 38.0
 
April 13, 2021, 9 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) -0.8 μg/m3 (0) 38.0
 
April 13, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 6.0 μg/m3 (6) 5.3 μg/m3 (23) 38.0