ID: 7876

AQSQID: 840180890034

Site Name: East Chicago - Marina

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

Updated: May 6, 2021, 7:47 p.m.

Location: E Chicago (Indiana Harbor), IN

Reporting: True, Located: True

Current AQI: 20.0

E Chicago (Indiana Harbor) IN, US: 41.653446, -87.435435

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 6, 2021, 6 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 4.6 μg/m3 (20) 20.0
 
May 6, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.2 μg/m3 (31) 31.0
 
May 6, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 6, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.8 μg/m3 (25) 25.0
 
May 6, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.1 μg/m3 (22) 22.0
 
May 6, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.9 μg/m3 (21) 21.0
 
May 6, 2021, noon 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
 
May 6, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 6, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.2 μg/m3 (18) 18.0
 
May 6, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 6, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
May 6, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
May 6, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.3 μg/m3 (27) 27.0
 
May 6, 2021, 5 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.7 μg/m3 (28) 28.0
 
May 6, 2021, 4 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 6, 2021, 3 a.m. N/A N/A N/A N/A N/A 8.0 ppb (12) N/A N/A N/A 8.7 μg/m3 (37) 37.0
 
May 6, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
May 6, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 2.7 μg/m3 (12) 12.0
 
May 6, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.2 μg/m3 (14) 14.0
 
May 5, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.2 μg/m3 (14) 14.0
 
May 5, 2021, 10 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
 
May 5, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 1.9 μg/m3 (8) 8.0
 
May 5, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 2.5 μg/m3 (11) 11.0
 
May 5, 2021, 7 p.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
 
May 5, 2021, 6 p.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
 
May 5, 2021, 5 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A 3.9 μg/m3 (17) 17.0
 
May 5, 2021, 4 p.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
May 5, 2021, 3 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.3 μg/m3 (31) 31.0
 
May 5, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.2 μg/m3 (14) 14.0
 
May 5, 2021, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 4.6 μg/m3 (20) 20.0
 
May 5, 2021, 10 a.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A 7.9 μg/m3 (33) 33.0
 
May 5, 2021, 9 a.m. N/A N/A N/A N/A N/A 6.0 ppb (9) N/A N/A N/A 8.6 μg/m3 (36) 36.0
 
May 5, 2021, 8 a.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A 6.7 μg/m3 (28) 28.0
 
May 5, 2021, 7 a.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A 7.7 μg/m3 (33) 33.0
 
May 5, 2021, 6 a.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 13.5 μg/m3 (54) 54.0
 
May 5, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
May 5, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.2 μg/m3 (39) 39.0
 
May 5, 2021, 3 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.1 μg/m3 (34) 34.0
 
May 5, 2021, 2 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.6 μg/m3 (32) 32.0
 
May 5, 2021, 1 a.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
May 5, 2021, midnight N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A 13.1 μg/m3 (54) 54.0
 
May 4, 2021, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 12.2 μg/m3 (52) 52.0
 
May 4, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.7 μg/m3 (41) 41.0
 
May 4, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
May 4, 2021, 8 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 10.8 μg/m3 (46) 46.0
 
May 4, 2021, 7 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 8.2 μg/m3 (35) 35.0
 
May 4, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.9 μg/m3 (17) 17.0
 
May 4, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.7 μg/m3 (16) 16.0
 
May 4, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.8 μg/m3 (16) 16.0
 
May 4, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.6 μg/m3 (16) 16.0
 
May 4, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.1 μg/m3 (22) 22.0
 
May 4, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
May 4, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.8 μg/m3 (25) 25.0
 
May 4, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.9 μg/m3 (21) 21.0
 
May 4, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
May 4, 2021, 9 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.5 μg/m3 (36) 36.0
 
May 4, 2021, 8 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
May 4, 2021, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.8 μg/m3 (37) 37.0
 
May 4, 2021, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
May 4, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.8 μg/m3 (41) 41.0
 
May 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.3 μg/m3 (23) 23.0
 
May 4, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.3 μg/m3 (39) 39.0
 
May 4, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 4, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.8 μg/m3 (33) 33.0
 
May 4, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 3, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.7 μg/m3 (28) 28.0
 
May 3, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 3, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 3, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.7 μg/m3 (33) 33.0
 
May 3, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.8 μg/m3 (33) 33.0
 
May 3, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.5 μg/m3 (40) 40.0
 
May 3, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.2 μg/m3 (39) 39.0
 
May 3, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.5 μg/m3 (36) 36.0
 
May 3, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.7 μg/m3 (33) 33.0
 
May 3, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.9 μg/m3 (33) 33.0
 
May 3, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.5 μg/m3 (36) 36.0
 
May 3, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.8 μg/m3 (41) 41.0
 
May 3, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
May 3, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.5 μg/m3 (40) 40.0
 
May 3, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.5 μg/m3 (36) 36.0
 
May 3, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.2 μg/m3 (39) 39.0
 
May 3, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
May 3, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.3 μg/m3 (35) 35.0
 
May 3, 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
 
May 3, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 3, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.2 μg/m3 (26) 26.0
 
May 3, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.1 μg/m3 (26) 26.0
 
May 3, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.3 μg/m3 (27) 27.0
 
May 3, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 2, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
May 2, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.7 μg/m3 (33) 33.0
 
May 2, 2021, 9 p.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
 
May 2, 2021, 8 p.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
 
May 2, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
May 2, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 2, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
May 2, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
May 2, 2021, 2 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.7 μg/m3 (33) 33.0
 
May 2, 2021, 1 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
May 2, 2021, noon N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 7.2 μg/m3 (31) 31.0
 
May 2, 2021, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
May 2, 2021, 10 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 2, 2021, 9 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 2, 2021, 8 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.7 μg/m3 (28) 28.0
 
May 2, 2021, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
May 2, 2021, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
May 2, 2021, 5 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.7 μg/m3 (33) 33.0
 
May 2, 2021, 4 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.6 μg/m3 (32) 32.0
 
May 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.3 μg/m3 (31) 31.0
 
May 2, 2021, 2 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
 
May 2, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
May 2, 2021, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
May 1, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 1, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
May 1, 2021, 9 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 1, 2021, 8 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.5 μg/m3 (32) 32.0
 
May 1, 2021, 7 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 1, 2021, 6 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
May 1, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
May 1, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.5 μg/m3 (28) 28.0
 
May 1, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.8 μg/m3 (20) 20.0
 
May 1, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.9 μg/m3 (21) 21.0
 
May 1, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.4 μg/m3 (23) 23.0
 
May 1, 2021, noon N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 6.1 μg/m3 (26) 26.0
 
May 1, 2021, 11 a.m. N/A N/A N/A N/A N/A 8.0 ppb (12) N/A N/A N/A 8.2 μg/m3 (35) 35.0
 
May 1, 2021, 10 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
May 1, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.5 μg/m3 (28) 28.0
 
May 1, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.2 μg/m3 (31) 31.0
 
May 1, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 10.1 μg/m3 (43) 43.0
 
May 1, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.6 μg/m3 (40) 40.0
 
May 1, 2021, 5 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 9.9 μg/m3 (42) 42.0
 
May 1, 2021, 4 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 9.8 μg/m3 (41) 41.0
 
May 1, 2021, 3 a.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A 9.2 μg/m3 (39) 39.0
 
May 1, 2021, 2 a.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
May 1, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.3 μg/m3 (14) 14.0
 
May 1, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.2 μg/m3 (14) 14.0
 
April 30, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 3.2 μg/m3 (14) 14.0
 
April 30, 2021, 7 p.m. N/A N/A N/A N/A N/A 10.0 ppb (15) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
April 30, 2021, 6 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 4.1 μg/m3 (18) 18.0
 
April 30, 2021, 5 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A 4.3 μg/m3 (18) 18.0
 
April 30, 2021, 4 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 6.3 μg/m3 (27) 27.0
 
April 30, 2021, 3 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A 7.6 μg/m3 (32) 32.0
 
April 30, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
April 30, 2021, 1 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 10.2 μg/m3 (43) 43.0
 
April 30, 2021, noon N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.3 μg/m3 (35) 35.0
 
April 30, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
April 30, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.2 μg/m3 (35) 35.0
 
April 30, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 10.8 μg/m3 (46) 46.0
 
April 30, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 8.5 μg/m3 (36) 36.0
 
April 30, 2021, 7 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.6 μg/m3 (36) 36.0
 
April 30, 2021, 6 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.9 μg/m3 (38) 38.0
 
April 30, 2021, 5 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
April 30, 2021, 4 a.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A 12.3 μg/m3 (52) 52.0
 
April 30, 2021, 2 a.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 13.1 μg/m3 (54) 54.0
 
April 30, 2021, 1 a.m. N/A N/A N/A N/A N/A 5.0 ppb (8) N/A N/A N/A 14.2 μg/m3 (56) 56.0
 
April 30, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 6.3 μg/m3 (27) 27.0
 
April 29, 2021, 11 p.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
 
April 29, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.2 μg/m3 (18) 18.0
 
April 29, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 4.3 μg/m3 (18) 18.0
 
April 29, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 5.1 μg/m3 (22) 22.0
 
April 29, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
April 29, 2021, 6 p.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
 
April 29, 2021, 5 p.m. N/A N/A N/A N/A N/A 3.0 ppb (5) N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
April 29, 2021, 4 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 8.3 μg/m3 (35) 35.0
 
April 29, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A 9.8 μg/m3 (41) 41.0
 
April 29, 2021, 2 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A 11.9 μg/m3 (50) 50.0
 
April 29, 2021, 1 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
April 29, 2021, noon N/A N/A N/A N/A N/A 4.0 ppb (6) N/A N/A N/A 12.1 μg/m3 (51) 51.0