ID: 1011

AQSQID: 170314007

Site Name: Desplns

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

Updated: April 10, 2021, 6:44 p.m.

Location: Des Plaines (Metropolitan Square), IL

Reporting: True, Located: True

Current AQI: 20.0

Des Plaines (Metropolitan Square) IL, US: 42.0603, -87.8631

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A -1.8 μg/m3 (0) 20.0
 
April 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A -5.6 μg/m3 (0) 17.0
 
April 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.6 μg/m3 (11) 15.0
 
April 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 5.5 μg/m3 (23) 23.0
 
April 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 8.5 μg/m3 (36) 36.0
 
April 10, 2021, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 10.6 μg/m3 (45) 45.0
 
April 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 11.4 μg/m3 (48) 48.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 9.9 μg/m3 (42) 42.0
 
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 8.6 μg/m3 (36) 36.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 13.3 μg/m3 (54) 54.0
 
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 11.2 μg/m3 (47) 47.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 9.9 μg/m3 (42) 42.0
 
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 8.6 μg/m3 (36) 36.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 6.1 μg/m3 (26) 26.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 4.2 μg/m3 (18) 18.0
 
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 7.7 μg/m3 (33) 33.0
 
April 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 7.7 μg/m3 (33) 33.0
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 5.2 μg/m3 (22) 29.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.3 μg/m3 (14) 29.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 5.5 μg/m3 (23) 31.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.2 μg/m3 (10) 30.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.5 μg/m3 (7) 26.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 4.9 μg/m3 (21) 26.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 2.9 μg/m3 (13) 24.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 4.2 μg/m3 (18) 18.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 4.5 μg/m3 (19) 19.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 2.1 μg/m3 (9) 12.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.0 μg/m3 (13) 22.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 0.6 μg/m3 (3) 24.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 2.4 μg/m3 (10) 24.0
 
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 4.9 μg/m3 (21) 24.0
 
April 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 25.0
 
April 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 3.8 μg/m3 (16) 24.0
 
April 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 6.3 μg/m3 (27) 27.0
 
April 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 7.2 μg/m3 (31) 31.0
 
April 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 8.9 μg/m3 (38) 38.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 8.9 μg/m3 (38) 38.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 7.9 μg/m3 (33) 33.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 8.1 μg/m3 (34) 34.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 6.8 μg/m3 (29) 29.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 6.4 μg/m3 (27) 27.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.6 μg/m3 (16) 25.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 0.9 μg/m3 (4) 20.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 4.1 μg/m3 (18) 33.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 9.4 μg/m3 (40) 40.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 7.8 μg/m3 (33) 33.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 4.1 μg/m3 (18) 20.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 14.2 μg/m3 (56) 56.0
 
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 12.1 μg/m3 (51) 51.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 9.7 μg/m3 (41) 41.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 7.8 μg/m3 (33) 33.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 7.6 μg/m3 (32) 32.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 8.8 μg/m3 (37) 37.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.6 μg/m3 (20) 34.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 15.1 μg/m3 (58) 58.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 15.8 μg/m3 (59) 59.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 15.4 μg/m3 (58) 58.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 11.7 μg/m3 (49) 49.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 11.5 μg/m3 (48) 48.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 12.5 μg/m3 (52) 52.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 15.8 μg/m3 (59) 59.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 15.6 μg/m3 (59) 59.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 12.7 μg/m3 (53) 53.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 15.4 μg/m3 (58) 58.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 11.9 μg/m3 (50) 50.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 5.9 μg/m3 (25) 35.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 11.8 μg/m3 (50) 50.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 13.4 μg/m3 (54) 54.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 17.5 μg/m3 (63) 63.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 16.6 μg/m3 (61) 61.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 17.8 μg/m3 (63) 63.0
 
April 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 17.1 μg/m3 (62) 62.0
 
April 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 16.7 μg/m3 (61) 61.0
 
April 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 21.6 μg/m3 (71) 71.0
 
April 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 22.8 μg/m3 (74) 74.0
 
April 7, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 24.6 μg/m3 (78) 78.0
 
April 7, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 18.0 μg/m3 (64) 64.0
 
April 7, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 16.9 μg/m3 (62) 62.0
 
April 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 19.2 μg/m3 (66) 66.0
 
April 7, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 20.2 μg/m3 (69) 69.0
 
April 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 15.5 μg/m3 (59) 59.0
 
April 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 12.8 μg/m3 (53) 53.0
 
April 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 11.5 μg/m3 (48) 48.0
 
April 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 15.6 μg/m3 (59) 59.0
 
April 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 16.4 μg/m3 (61) 61.0
 
April 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 16.5 μg/m3 (61) 61.0
 
April 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 9.2 μg/m3 (39) 44.0
 
April 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 11.8 μg/m3 (50) 50.0
 
April 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 17.2 μg/m3 (62) 62.0
 
April 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 15.3 μg/m3 (58) 58.0
 
April 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 17.7 μg/m3 (63) 63.0
 
April 6, 2021, noon N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 15.6 μg/m3 (59) 59.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 16.8 μg/m3 (61) 61.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 16.4 μg/m3 (61) 61.0
 
April 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 17.5 μg/m3 (63) 63.0
 
April 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 20.8 μg/m3 (70) 70.0
 
April 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 12.7 μg/m3 (53) 53.0
 
April 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 15.8 μg/m3 (59) 59.0
 
April 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 21.0 μg/m3 (70) 70.0
 
April 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 19.4 μg/m3 (67) 67.0
 
April 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 21.1 μg/m3 (70) 70.0
 
April 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 18.8 μg/m3 (66) 66.0
 
April 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 16.0 μg/m3 (60) 60.0
 
April 6, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 21.8 μg/m3 (72) 72.0
 
April 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 20.1 μg/m3 (68) 68.0
 
April 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 16.7 μg/m3 (61) 61.0
 
April 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 16.8 μg/m3 (61) 61.0
 
April 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 15.4 μg/m3 (58) 58.0
 
April 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 18.7 μg/m3 (65) 65.0
 
April 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 20.0 μg/m3 (68) 68.0
 
April 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 16.1 μg/m3 (60) 60.0
 
April 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 14.7 μg/m3 (57) 57.0
 
April 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 15.2 μg/m3 (58) 58.0
 
April 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 15.2 μg/m3 (58) 58.0
 
April 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 12.6 μg/m3 (53) 53.0
 
April 5, 2021, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 7.7 μg/m3 (33) 35.0
 
April 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.6 μg/m3 (28) 41.0
 
April 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 14.1 μg/m3 (56) 56.0
 
April 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 18.5 μg/m3 (65) 65.0
 
April 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 21.9 μg/m3 (72) 72.0
 
April 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 27.6 μg/m3 (84) 84.0
 
April 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 24.3 μg/m3 (77) 77.0
 
April 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 26.8 μg/m3 (82) 82.0
 
April 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 39.1 μg/m3 (110) 110.0
 
April 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 45.6 μg/m3 (126) 126.0
 
April 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 36.9 μg/m3 (105) 105.0
 
April 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 31.3 μg/m3 (92) 92.0
 
April 5, 2021, midnight N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 22.4 μg/m3 (73) 73.0
 
April 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 22.2 μg/m3 (73) 81.0
 
April 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (84) N/A N/A 23.0 μg/m3 (74) 84.0
 
April 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (87) N/A N/A 19.7 μg/m3 (67) 87.0
 
April 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 68.0 ppb (94) N/A N/A 21.3 μg/m3 (71) 94.0
 
April 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 67.0 ppb (91) N/A N/A 33.2 μg/m3 (96) 96.0
 
April 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 36.8 μg/m3 (105) 105.0
 
April 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 41.6 μg/m3 (117) 117.0
 
April 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 33.9 μg/m3 (97) 97.0
 
April 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 39.4 μg/m3 (111) 111.0
 
April 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 44.7 μg/m3 (124) 124.0
 
April 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 49.8 μg/m3 (137) 137.0
 
April 4, 2021, noon N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 50.5 μg/m3 (138) 138.0
 
April 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 59.2 μg/m3 (153) 153.0
 
April 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 63.2 μg/m3 (155) 155.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 62.7 μg/m3 (155) 155.0
 
April 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 57.8 μg/m3 (153) 153.0
 
April 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 51.4 μg/m3 (141) 141.0
 
April 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 54.9 μg/m3 (149) 149.0
 
April 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 54.8 μg/m3 (149) 149.0
 
April 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 60.0 μg/m3 (154) 154.0
 
April 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 55.2 μg/m3 (150) 150.0
 
April 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 37.9 μg/m3 (107) 107.0
 
April 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 30.4 μg/m3 (90) 90.0
 
April 4, 2021, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 29.1 μg/m3 (87) 87.0
 
April 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 27.3 μg/m3 (83) 83.0
 
April 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 22.6 μg/m3 (74) 74.0
 
April 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 22.5 μg/m3 (73) 73.0
 
April 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 24.9 μg/m3 (78) 78.0
 
April 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 24.0 μg/m3 (77) 77.0
 
April 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 25.9 μg/m3 (81) 81.0