ID: 335

AQSQID: 170310001

Site Name: Alsip

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

Updated: April 11, 2021, 3:43 a.m.

Location: Alsip (Howes Landing Boat Launch), IL

Reporting: True, Located: True

Current AQI: 41.0

Alsip (Howes Landing Boat Launch) IL, US: 41.6708, -87.7325

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 11, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.9 μg/m3 (25) 41.0
 
April 11, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 6.5 μg/m3 (28) 43.0
 
April 11, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 8.2 μg/m3 (35) 49.0
 
April 10, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 11.9 μg/m3 (50) 50.0
 
April 10, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 18.0 μg/m3 (64) 64.0
 
April 10, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 11.8 μg/m3 (50) 50.0
 
April 10, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 10.6 μg/m3 (45) 45.0
 
April 10, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 13.1 μg/m3 (54) 54.0
 
April 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 10.2 μg/m3 (43) 43.0
 
April 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 6.1 μg/m3 (26) 26.0
 
April 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 8.4 μg/m3 (36) 36.0
 
April 10, 2021, noon N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 8.5 μg/m3 (36) 36.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 10.8 μg/m3 (46) 46.0
 
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 12.1 μg/m3 (51) 51.0
 
April 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 5.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 9.6 μg/m3 (40) 40.0
 
April 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A 7.3 μg/m3 (31) 31.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 5.4 μg/m3 (23) 23.0
 
April 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 5.9 μg/m3 (25) 25.0
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 6.5 μg/m3 (28) 31.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.1 μg/m3 (26) 36.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 6.5 μg/m3 (28) 36.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 8.3 μg/m3 (35) 38.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 8.5 μg/m3 (36) 37.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 8.9 μg/m3 (38) 38.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 7.5 μg/m3 (32) 35.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 8.3 μg/m3 (35) 35.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 5.4 μg/m3 (23) 23.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.1 μg/m3 (26) 26.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.3 μg/m3 (27) 27.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 0.0
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 5.6 μg/m3 (24) 24.0
 
April 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.1 μg/m3 (26) 26.0
 
April 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.5 μg/m3 (32) 32.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 8.6 μg/m3 (36) 36.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.5 μg/m3 (28) 28.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 4.6 μg/m3 (20) 42.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.7 μg/m3 (24) 41.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.9 μg/m3 (25) 25.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 5.3 μg/m3 (23) 45.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.9 μg/m3 (25) 43.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 6.9 μg/m3 (29) 43.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 6.3 μg/m3 (27) 38.0
 
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 5.9 μg/m3 (25) 42.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 6.7 μg/m3 (28) 44.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A N/A 44.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 9.0 μg/m3 (38) 45.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 8.1 μg/m3 (34) 48.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 9.2 μg/m3 (39) 39.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 10.7 μg/m3 (45) 45.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 11.7 μg/m3 (49) 49.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 10.6 μg/m3 (45) 45.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 8.2 μg/m3 (35) 35.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 12.6 μg/m3 (53) 53.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 10.9 μg/m3 (46) 46.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 10.1 μg/m3 (43) 43.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.3 μg/m3 (35) 35.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.8 μg/m3 (50) 50.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.3 μg/m3 (58) 58.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.7 μg/m3 (41) 41.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.7 μg/m3 (45) 45.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.2 μg/m3 (47) 47.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.9 μg/m3 (55) 55.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.4 μg/m3 (48) 48.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.5 μg/m3 (52) 52.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.2 μg/m3 (47) 47.0
 
April 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.1 μg/m3 (51) 51.0
 
April 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.2 μg/m3 (62) 62.0
 
April 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.3 μg/m3 (62) 62.0
 
April 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.4 μg/m3 (58) 58.0
 
April 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.3 μg/m3 (60) 60.0
 
April 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.6 μg/m3 (55) 55.0
 
April 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.6 μg/m3 (53) 53.0
 
April 7, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.2 μg/m3 (54) 54.0
 
April 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
April 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.4 μg/m3 (48) 48.0
 
April 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.3 μg/m3 (43) 43.0
 
April 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.6 μg/m3 (45) 45.0
 
April 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.2 μg/m3 (58) 58.0
 
April 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.6 μg/m3 (49) 49.0
 
April 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.8 μg/m3 (50) 50.0
 
April 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.1 μg/m3 (47) 47.0
 
April 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.5 μg/m3 (52) 52.0
 
April 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.9 μg/m3 (62) 62.0
 
April 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.6 μg/m3 (61) 61.0
 
April 6, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.7 μg/m3 (55) 55.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.5 μg/m3 (63) 63.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.2 μg/m3 (60) 60.0
 
April 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.3 μg/m3 (58) 58.0
 
April 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.9 μg/m3 (53) 53.0
 
April 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.5 μg/m3 (57) 57.0
 
April 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.5 μg/m3 (59) 59.0
 
April 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.9 μg/m3 (64) 64.0
 
April 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.3 μg/m3 (54) 54.0
 
April 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.8 μg/m3 (61) 61.0
 
April 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.2 μg/m3 (58) 58.0
 
April 6, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.7 μg/m3 (49) 49.0
 
April 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.9 μg/m3 (46) 46.0
 
April 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.8 μg/m3 (55) 55.0
 
April 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.6 μg/m3 (55) 55.0
 
April 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.8 μg/m3 (53) 53.0
 
April 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 13.3 μg/m3 (54) 54.0
 
April 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 14.8 μg/m3 (57) 57.0
 
April 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.7 μg/m3 (55) 55.0
 
April 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.8 μg/m3 (63) 63.0
 
April 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 16.6 μg/m3 (61) 61.0
 
April 5, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 19.3 μg/m3 (67) 67.0
 
April 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 17.2 μg/m3 (62) 62.0
 
April 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 18.9 μg/m3 (66) 66.0
 
April 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 16.1 μg/m3 (60) 60.0
 
April 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 20.9 μg/m3 (70) 70.0
 
April 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 0.0
April 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 19.5 μg/m3 (67) 67.0
 
April 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 19.9 μg/m3 (68) 68.0
 
April 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 20.1 μg/m3 (68) 68.0
 
April 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 18.0 μg/m3 (64) 64.0
 
April 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 17.2 μg/m3 (62) 62.0
 
April 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 14.7 μg/m3 (57) 57.0
 
April 5, 2021, midnight N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 11.2 μg/m3 (47) 47.0
 
April 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.3 μg/m3 (43) 43.0
 
April 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 11.8 μg/m3 (50) 50.0
 
April 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 11.3 μg/m3 (48) 48.0
 
April 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 12.6 μg/m3 (53) 53.0
 
April 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 13.4 μg/m3 (54) 54.0
 
April 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 14.9 μg/m3 (57) 57.0
 
April 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 18.8 μg/m3 (66) 66.0
 
April 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 17.4 μg/m3 (63) 63.0
 
April 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 13.2 μg/m3 (54) 54.0
 
April 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 12.2 μg/m3 (52) 52.0
 
April 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 13.7 μg/m3 (55) 55.0
 
April 4, 2021, noon N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 15.5 μg/m3 (59) 59.0
 
April 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 22.2 μg/m3 (73) 73.0
 
April 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 23.1 μg/m3 (75) 75.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 31.1 μg/m3 (91) 91.0
 
April 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 31.9 μg/m3 (93) 93.0
 
April 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 0.0
April 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 0.0
April 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 24.7 μg/m3 (78) 78.0
 
April 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 27.5 μg/m3 (84) 84.0
 
April 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 28.8 μg/m3 (87) 87.0
 
April 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 24.2 μg/m3 (77) 77.0
 
April 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 18.2 μg/m3 (64) 64.0
 
April 4, 2021, midnight N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 15.3 μg/m3 (58) 58.0
 
April 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 11.9 μg/m3 (50) 50.0