ID: 507

AQSQID: 261470005

Site Name: Port Huron

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

Updated: June 23, 2021, 4:51 p.m.

Location: Port Huron (Dove St), MI

Reporting: True, Located: True

Current AQI: 43.0

Port Huron (Dove St) MI, US: 42.9533, -82.4564

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
June 23, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 3.4 μg/m3 (15) 43.0
 
June 23, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 3.8 μg/m3 (16) 40.0
 
June 23, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 5.1 μg/m3 (22) 36.0
 
June 23, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A N/A 5.2 μg/m3 (22) 22.0
 
June 23, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 6.0 ppb (6) N/A N/A 6.9 μg/m3 (29) 29.0
 
June 23, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 1.0 ppb (1) N/A N/A 6.2 μg/m3 (26) 26.0
 
June 23, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 1.0 ppb (1) N/A N/A 5.7 μg/m3 (24) 24.0
 
June 23, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 3.0 ppb (3) N/A N/A 4.7 μg/m3 (20) 20.0
 
June 23, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 5.0 ppb (5) N/A N/A 4.6 μg/m3 (20) 20.0
 
June 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 4.7 μg/m3 (20) 20.0
 
June 23, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.5 μg/m3 (19) 19.0
 
June 23, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 14.0 ppb (13) N/A N/A 4.9 μg/m3 (21) 21.0
 
June 23, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 5.1 μg/m3 (22) 22.0
 
June 23, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) N/A N/A 5.6 μg/m3 (24) 24.0
 
June 23, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A N/A 3.1 μg/m3 (13) 17.0
 
June 23, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 2.9 μg/m3 (13) 22.0
 
June 22, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 2.1 μg/m3 (9) 25.0
 
June 22, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 1.5 μg/m3 (7) 24.0
 
June 22, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 1.9 μg/m3 (8) 25.0
 
June 22, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 2.2 μg/m3 (10) 25.0
 
June 22, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 1.8 μg/m3 (8) 26.0
 
June 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
June 22, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 2.3 μg/m3 (10) 10.0
 
June 22, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 1.9 μg/m3 (8) 24.0
 
June 22, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 1.5 μg/m3 (7) 23.0
 
June 22, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 1.4 μg/m3 (6) 22.0
 
June 22, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 1.4 μg/m3 (6) 20.0
 
June 22, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A N/A 2.4 μg/m3 (10) 17.0
 
June 22, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 14.0 ppb (13) N/A N/A 2.6 μg/m3 (11) 13.0
 
June 22, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 12.0 ppb (12) N/A N/A 2.5 μg/m3 (11) 12.0
 
June 22, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 16.0 ppb (15) N/A N/A 2.4 μg/m3 (10) 15.0
 
June 22, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 19.0 ppb (18) N/A N/A 2.5 μg/m3 (11) 18.0
 
June 22, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 2.8 μg/m3 (12) 19.0
 
June 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 3.3 μg/m3 (14) 23.0
 
June 22, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 2.9 μg/m3 (13) 13.0
 
June 22, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
June 22, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 2.5 μg/m3 (11) 20.0
 
June 22, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) N/A N/A 2.9 μg/m3 (13) 16.0
 
June 22, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 16.0 ppb (15) N/A N/A 3.4 μg/m3 (15) 15.0
 
June 22, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 4.0 μg/m3 (17) 19.0
 
June 21, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 3.8 μg/m3 (16) 22.0
 
June 21, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 3.1 μg/m3 (13) 28.0
 
June 21, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
June 21, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 1.4 μg/m3 (6) 34.0
 
June 21, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 2.4 μg/m3 (10) 31.0
 
June 21, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
June 21, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 6.1 μg/m3 (26) 38.0
 
June 21, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 5.9 μg/m3 (25) 42.0
 
June 21, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 4.8 μg/m3 (20) 41.0
 
June 21, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 44.0 ppb (41) N/A N/A 4.1 μg/m3 (18) 41.0
 
June 21, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 3.4 μg/m3 (15) 42.0
 
June 21, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 3.1 μg/m3 (13) 39.0
 
June 21, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
June 21, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
June 21, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 6.9 μg/m3 (29) 40.0
 
June 21, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 6.3 μg/m3 (27) 37.0
 
June 21, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 6.2 μg/m3 (26) 40.0
 
June 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.9 μg/m3 (25) 36.0
 
June 21, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.7 μg/m3 (20) 20.0
 
June 21, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 4.5 μg/m3 (19) 43.0
 
June 21, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 10.1 μg/m3 (43) 44.0
 
June 21, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 9.3 μg/m3 (39) 50.0
 
June 21, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 60.0 ppb (68) N/A N/A 7.7 μg/m3 (33) 68.0
 
June 21, 2021, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) 65.0 ppb (84) N/A N/A 6.3 μg/m3 (27) 84.0
 
June 20, 2021, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 65.0 ppb (84) N/A N/A 7.0 μg/m3 (30) 84.0
 
June 20, 2021, 10 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) 66.0 ppb (87) N/A N/A 13.8 μg/m3 (55) 87.0
 
June 20, 2021, 9 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) 73.0 ppb (103) N/A N/A 16.0 μg/m3 (60) 103.0
 
June 20, 2021, 8 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) 71.0 ppb (101) N/A N/A 13.4 μg/m3 (54) 101.0
 
June 20, 2021, 7 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) 64.0 ppb (81) N/A N/A 9.9 μg/m3 (42) 81.0
 
June 20, 2021, 6 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) 61.0 ppb (71) N/A N/A 9.4 μg/m3 (40) 71.0
 
June 20, 2021, 5 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) 60.0 ppb (68) N/A N/A 12.0 μg/m3 (50) 68.0
 
June 20, 2021, 4 p.m. N/A N/A N/A N/A N/A 10.0 ppb (15) 56.0 ppb (55) N/A N/A 14.4 μg/m3 (56) 56.0
 
June 20, 2021, 3 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) 48.0 ppb (45) N/A N/A 8.5 μg/m3 (36) 45.0
 
June 20, 2021, 2 p.m. N/A N/A N/A N/A N/A 12.0 ppb (18) 47.0 ppb (44) N/A N/A 9.1 μg/m3 (38) 44.0
 
June 20, 2021, 1 p.m. N/A N/A N/A N/A N/A 10.0 ppb (15) 41.0 ppb (38) N/A N/A 7.9 μg/m3 (33) 38.0
 
June 20, 2021, noon N/A N/A N/A N/A N/A 9.0 ppb (13) 38.0 ppb (36) N/A N/A 7.6 μg/m3 (32) 36.0
 
June 20, 2021, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 19.0 ppb (18) N/A N/A 13.2 μg/m3 (54) 54.0
 
June 20, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 4.0 ppb (4) N/A N/A 18.3 μg/m3 (65) 65.0
 
June 20, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 4.0 ppb (4) N/A N/A 13.9 μg/m3 (55) 55.0
 
June 20, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 6.0 ppb (6) N/A N/A 12.6 μg/m3 (53) 53.0
 
June 20, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 6.0 ppb (6) N/A N/A 8.7 μg/m3 (37) 37.0
 
June 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 8.7 μg/m3 (37) 37.0
 
June 20, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.9 μg/m3 (38) 38.0
 
June 20, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 7.8 μg/m3 (33) 33.0
 
June 20, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 7.8 μg/m3 (33) 33.0
 
June 20, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 6.4 μg/m3 (27) 27.0
 
June 20, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 5.7 μg/m3 (24) 37.0
 
June 20, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 46.0 ppb (43) N/A N/A 4.7 μg/m3 (20) 43.0
 
June 19, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 49.0 ppb (46) N/A N/A 3.8 μg/m3 (16) 46.0
 
June 19, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 3.6 μg/m3 (16) 45.0
 
June 19, 2021, 9 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 48.0 ppb (45) N/A N/A 4.0 μg/m3 (17) 45.0
 
June 19, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 4.9 μg/m3 (21) 39.0
 
June 19, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 3.8 μg/m3 (16) 44.0
 
June 19, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 50.0 ppb (47) N/A N/A 3.2 μg/m3 (14) 47.0
 
June 19, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 54.0 ppb (50) N/A N/A 4.3 μg/m3 (18) 50.0
 
June 19, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 8.7 μg/m3 (37) 44.0
 
June 19, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A N/A 12.3 μg/m3 (52) 52.0
 
June 19, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 12.0 μg/m3 (50) 50.0
 
June 19, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 11.6 μg/m3 (49) 49.0
 
June 19, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 11.0 μg/m3 (46) 46.0
 
June 19, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 11.5 μg/m3 (48) 48.0
 
June 19, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 12.6 μg/m3 (53) 53.0
 
June 19, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 13.6 μg/m3 (55) 55.0
 
June 19, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 14.4 μg/m3 (56) 56.0
 
June 19, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 15.1 μg/m3 (58) 58.0
 
June 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 13.9 μg/m3 (55) 55.0
 
June 19, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 12.5 μg/m3 (52) 52.0
 
June 19, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 55.0 ppb (51) N/A N/A 12.1 μg/m3 (51) 51.0
 
June 19, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 11.5 μg/m3 (48) 49.0
 
June 19, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 11.8 μg/m3 (50) 50.0
 
June 19, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 53.0 ppb (50) N/A N/A 10.6 μg/m3 (45) 50.0
 
June 19, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 57.0 ppb (58) N/A N/A 9.8 μg/m3 (41) 58.0
 
June 18, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 57.0 ppb (58) N/A N/A 9.1 μg/m3 (38) 58.0
 
June 18, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 58.0 ppb (61) N/A N/A 8.9 μg/m3 (38) 61.0
 
June 18, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 59.0 ppb (65) N/A N/A 8.0 μg/m3 (34) 65.0
 
June 18, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 60.0 ppb (68) N/A N/A 8.4 μg/m3 (36) 68.0
 
June 18, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 65.0 ppb (84) N/A N/A 10.6 μg/m3 (45) 84.0
 
June 18, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 60.0 ppb (68) N/A N/A 11.7 μg/m3 (49) 68.0
 
June 18, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 57.0 ppb (58) N/A N/A 10.5 μg/m3 (44) 58.0
 
June 18, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 54.0 ppb (50) N/A N/A 7.9 μg/m3 (33) 50.0
 
June 18, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 48.0 ppb (45) N/A N/A 7.4 μg/m3 (31) 45.0
 
June 18, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 8.1 μg/m3 (34) 38.0
 
June 18, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 8.1 μg/m3 (34) 37.0
 
June 18, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 7.5 μg/m3 (32) 39.0
 
June 18, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 7.9 μg/m3 (33) 40.0
 
June 18, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 8.0 μg/m3 (34) 40.0
 
June 18, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 9.8 μg/m3 (41) 41.0
 
June 18, 2021, 8 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 36.0 ppb (34) N/A N/A 10.0 μg/m3 (42) 42.0
 
June 18, 2021, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 35.0 ppb (33) N/A N/A 8.8 μg/m3 (37) 37.0
 
June 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 8.5 μg/m3 (36) 36.0
 
June 18, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.5 μg/m3 (32) 32.0
 
June 18, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 59.0 ppb (65) N/A N/A 6.7 μg/m3 (28) 65.0
 
June 18, 2021, 3 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 58.0 ppb (61) N/A N/A 7.5 μg/m3 (32) 61.0
 
June 18, 2021, 2 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 55.0 ppb (51) N/A N/A 7.5 μg/m3 (32) 51.0
 
June 18, 2021, 1 a.m. N/A N/A N/A N/A N/A 6.0 ppb (9) 57.0 ppb (58) N/A N/A 7.5 μg/m3 (32) 58.0
 
June 18, 2021, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) 73.0 ppb (103) N/A N/A 7.6 μg/m3 (32) 103.0
 
June 17, 2021, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 77.0 ppb (105) N/A N/A 7.5 μg/m3 (32) 105.0
 
June 17, 2021, 10 p.m. N/A N/A N/A N/A N/A 5.0 ppb (8) 79.0 ppb (106) N/A N/A 7.6 μg/m3 (32) 106.0
 
June 17, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 79.0 ppb (106) N/A N/A 7.3 μg/m3 (31) 106.0
 
June 17, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 78.0 ppb (105) N/A N/A 7.5 μg/m3 (32) 105.0
 
June 17, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 78.0 ppb (105) N/A N/A 7.6 μg/m3 (32) 105.0
 
June 17, 2021, 6 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 76.0 ppb (104) N/A N/A 7.5 μg/m3 (32) 104.0
 
June 17, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 68.0 ppb (94) N/A N/A 7.1 μg/m3 (30) 94.0
 
June 17, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 58.0 ppb (61) N/A N/A 6.3 μg/m3 (27) 61.0
 
June 17, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 54.0 ppb (50) N/A N/A 5.6 μg/m3 (24) 50.0
 
June 17, 2021, 2 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 47.0 ppb (44) N/A N/A 5.7 μg/m3 (24) 44.0
 
June 17, 2021, 1 p.m. N/A N/A N/A N/A N/A 7.0 ppb (10) 39.0 ppb (37) N/A N/A 5.2 μg/m3 (22) 37.0
 
June 17, 2021, noon N/A N/A N/A N/A N/A 5.0 ppb (8) 32.0 ppb (30) N/A N/A 7.0 μg/m3 (30) 30.0
 
June 17, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 13.0 ppb (13) N/A N/A 8.9 μg/m3 (38) 38.0
 
June 17, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 1.0 ppb (1) N/A N/A 8.8 μg/m3 (37) 37.0
 
June 17, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 0.0 ppb (0) N/A N/A 9.6 μg/m3 (40) 40.0
 
June 17, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 0.0 ppb (0) N/A N/A 8.7 μg/m3 (37) 37.0
 
June 17, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 2.0 ppb (2) N/A N/A 7.8 μg/m3 (33) 33.0
 
June 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 6.3 μg/m3 (27) 27.0
 
June 17, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.3 μg/m3 (31) 31.0
 
June 17, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 12.0 ppb (12) N/A N/A 6.6 μg/m3 (28) 28.0
 
June 17, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 6.7 μg/m3 (28) 28.0
 
June 17, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
June 17, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 4.9 μg/m3 (21) 28.0
 
June 17, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 4.1 μg/m3 (18) 32.0
 
June 16, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 3.9 μg/m3 (17) 33.0
 
June 16, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.7 μg/m3 (16) 34.0
 
June 16, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 3.9 μg/m3 (17) 33.0
 
June 16, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 4.2 μg/m3 (18) 33.0
 
June 16, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 3.7 μg/m3 (16) 33.0
 
June 16, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.9 μg/m3 (17) 34.0
 
June 16, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.4 μg/m3 (15) 34.0
 
June 16, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.3 μg/m3 (14) 34.0