AQSQID: 170314201

Site Name: Northbrk

Location: Nbrook (Braeside), IL

Reporting: True, Located: True

Current AQI: 34.0

Nbrook (Braeside) IL, US: 42.1406, -87.7994

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 6, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 8.1 μg/m3 (34) 34.0
 
April 6, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 7.9 μg/m3 (33) 33.0
 
April 6, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 6, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 5.6 μg/m3 (23) 25.0
 
April 6, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 11.7 μg/m3 (49) 49.0
 
April 6, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 11.9 μg/m3 (50) 50.0
 
April 6, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 6, 2020, noon N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 6, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 7.5 μg/m3 (31) 31.0
 
April 6, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 8.2 μg/m3 (34) 34.0
 
April 6, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 6, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 7.8 μg/m3 (32) 32.0
 
April 6, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 6.1 μg/m3 (25) 25.0
 
April 6, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 8.3 μg/m3 (35) 35.0
 
April 6, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 6, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 9.3 μg/m3 (39) 39.0
 
April 6, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 7.2 μg/m3 (30) 30.0
 
April 6, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 7.2 μg/m3 (30) 30.0
 
April 6, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 5.1 μg/m3 (21) 25.0
 
April 6, 2020, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 5.5 μg/m3 (23) 31.0
 
April 5, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A -4.2 μg/m3 (0) 31.0
 
April 5, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A -6.5 μg/m3 (0) 31.0
 
April 5, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 2.7 μg/m3 (11) 30.0
 
April 5, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 6.3 μg/m3 (26) 30.0
 
April 5, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 0.5 μg/m3 (2) 31.0
 
April 5, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.4 μg/m3 (18) 30.0
 
April 5, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 3.0 μg/m3 (12) 29.0
 
April 5, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 1.5 μg/m3 (6) 29.0
 
April 5, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 1.4 μg/m3 (6) 26.0
 
April 5, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A -5.6 μg/m3 (0) 25.0
 
April 5, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A -2.2 μg/m3 (0) 22.0
 
April 5, 2020, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.1 μg/m3 (5) 21.0
 
April 5, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 6.1 μg/m3 (25) 25.0
 
April 5, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 2.7 μg/m3 (11) 19.0
 
April 5, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 4.4 μg/m3 (18) 18.0
 
April 5, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 5, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 8.6 μg/m3 (36) 36.0
 
April 5, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 7.8 μg/m3 (32) 32.0
 
April 5, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 1.5 μg/m3 (6) 8.0
 
April 5, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 3.9 μg/m3 (16) 16.0
 
April 5, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 5.6 μg/m3 (23) 23.0
 
April 5, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 4.8 μg/m3 (20) 20.0
 
April 5, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 9.6 μg/m3 (40) 40.0
 
April 5, 2020, midnight N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 6.4 μg/m3 (27) 27.0
 
April 4, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 2.5 μg/m3 (10) 22.0
 
April 4, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A -0.5 μg/m3 (0) 21.0
 
April 4, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 2.1 μg/m3 (9) 22.0
 
April 4, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 2.7 μg/m3 (11) 18.0
 
April 4, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 2.0 μg/m3 (8) 17.0
 
April 4, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 3.3 μg/m3 (14) 14.0
 
April 4, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 1.7 μg/m3 (7) 15.0
 
April 4, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 1.3 μg/m3 (5) 15.0
 
April 4, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 5.4 μg/m3 (23) 23.0
 
April 4, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 4.4 μg/m3 (18) 18.0
 
April 4, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 3.3 μg/m3 (14) 14.0
 
April 4, 2020, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 4.1 μg/m3 (17) 17.0
 
April 4, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 4.5 μg/m3 (19) 19.0
 
April 4, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 4.6 μg/m3 (19) 19.0
 
April 4, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 3.3 μg/m3 (14) 14.0
 
April 4, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 6.6 μg/m3 (28) 28.0
 
April 4, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 4, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 11.5 μg/m3 (48) 48.0
 
April 4, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 18.6 μg/m3 (64) 64.0
 
April 4, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 13.8 μg/m3 (54) 54.0
 
April 4, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 12.1 μg/m3 (50) 50.0
 
April 4, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 13.5 μg/m3 (53) 53.0
 
April 4, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 11.2 μg/m3 (47) 47.0
 
April 4, 2020, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 12.3 μg/m3 (51) 51.0
 
April 3, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 12.2 μg/m3 (50) 50.0
 
April 3, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 9.7 μg/m3 (40) 40.0
 
April 3, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.2 μg/m3 (34) 38.0
 
April 3, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 9.5 μg/m3 (40) 40.0
 
April 3, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 10.7 μg/m3 (45) 45.0
 
April 3, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 13.6 μg/m3 (53) 53.0
 
April 3, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 9.8 μg/m3 (41) 41.0
 
April 3, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 3, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 10.3 μg/m3 (43) 43.0
 
April 3, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 1.5 μg/m3 (6) 14.0
 
April 3, 2020, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 1.3 μg/m3 (5) 10.0
 
April 3, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 1.7 μg/m3 (7) 12.0
 
April 3, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
April 3, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 0.8 μg/m3 (3) 24.0
 
April 3, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 4.8 μg/m3 (20) 22.0
 
April 3, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 3.1 μg/m3 (13) 13.0
 
April 3, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 0.8 μg/m3 (3) 12.0
 
April 3, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 5.4 μg/m3 (23) 23.0
 
April 3, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 1.3 μg/m3 (5) 15.0
 
April 3, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 1.8 μg/m3 (8) 18.0
 
April 3, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 2.6 μg/m3 (11) 20.0
 
April 3, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.3 μg/m3 (5) 21.0
 
April 3, 2020, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.5 μg/m3 (10) 23.0
 
April 2, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.9 μg/m3 (16) 25.0
 
April 2, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 5.9 μg/m3 (25) 27.0
 
April 2, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 1.1 μg/m3 (5) 28.0
 
April 2, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 0.7 μg/m3 (3) 26.0
 
April 2, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 0.8 μg/m3 (3) 26.0
 
April 2, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A -1.9 μg/m3 (0) 26.0
 
April 2, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A -1.8 μg/m3 (0) 26.0
 
April 2, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A -2.2 μg/m3 (0) 25.0
 
April 2, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 1.0 μg/m3 (4) 20.0
 
April 2, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 0.4 μg/m3 (2) 17.0
 
April 2, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 6.9 μg/m3 (29) 29.0
 
April 2, 2020, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 11.3 μg/m3 (47) 47.0
 
April 2, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 2, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.2 μg/m3 (42) 42.0
 
April 2, 2020, 9 a.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 2, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.7 μg/m3 (28) 28.0
 
April 2, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 7.1 μg/m3 (30) 30.0
 
April 2, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 4.6 μg/m3 (19) 19.0
 
April 2, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 4.8 μg/m3 (20) 20.0
 
April 2, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 2.7 μg/m3 (11) 16.0
 
April 2, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 2.2 μg/m3 (9) 18.0
 
April 2, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 7.3 μg/m3 (30) 30.0
 
April 2, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 7.9 μg/m3 (33) 33.0
 
April 2, 2020, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 4.3 μg/m3 (18) 21.0
 
April 1, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 6.8 μg/m3 (28) 28.0
 
April 1, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 4.6 μg/m3 (19) 23.0
 
April 1, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 0.0 μg/m3 (0) 22.0
 
April 1, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
April 1, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 4.3 μg/m3 (18) 22.0
 
April 1, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 2.7 μg/m3 (11) 22.0
 
April 1, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 3.6 μg/m3 (15) 20.0
 
April 1, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 1, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 1, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 2.4 μg/m3 (10) 16.0
 
April 1, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 8.3 μg/m3 (35) 35.0
 
April 1, 2020, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 1, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 5.6 μg/m3 (23) 23.0
 
April 1, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 4.6 μg/m3 (19) 19.0
 
April 1, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 4.8 μg/m3 (20) 20.0
 
April 1, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 3.7 μg/m3 (15) 16.0
 
April 1, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 0.2 μg/m3 (1) 17.0
 
April 1, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A -2.3 μg/m3 (0) 18.0
 
April 1, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.2 μg/m3 (5) 22.0
 
April 1, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.2 μg/m3 (22) 22.0
 
April 1, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 1.8 μg/m3 (8) 22.0
 
April 1, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.8 μg/m3 (16) 22.0
 
April 1, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.8 μg/m3 (24) 24.0
 
April 1, 2020, midnight N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
March 31, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A -3.7 μg/m3 (0) 22.0
 
March 31, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 31, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.6 μg/m3 (23) 23.0
 
March 31, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
March 31, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 0.7 μg/m3 (3) 22.0
 
March 31, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 0.8 μg/m3 (3) 23.0
 
March 31, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A -1.1 μg/m3 (0) 23.0
 
March 31, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 6.5 μg/m3 (27) 27.0
 
March 31, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 1.0 μg/m3 (4) 22.0
 
March 31, 2020, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.9 μg/m3 (25) 25.0
 
March 31, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A -0.3 μg/m3 (0) 24.0
 
March 31, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 3.1 μg/m3 (13) 25.0
 
March 31, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 4.4 μg/m3 (18) 25.0
 
March 31, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 2.6 μg/m3 (11) 25.0
 
March 31, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.7 μg/m3 (15) 25.0
 
March 31, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 5.0 μg/m3 (21) 25.0
 
March 31, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 4.8 μg/m3 (20) 25.0
 
March 31, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.8 μg/m3 (28) 28.0
 
March 31, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 2.4 μg/m3 (10) 30.0
 
March 31, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 3.5 μg/m3 (15) 29.0
 
March 31, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 7.0 μg/m3 (29) 30.0
 
March 31, 2020, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 2.1 μg/m3 (9) 28.0
 
March 30, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 2.0 μg/m3 (8) 31.0
 
March 30, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A -0.7 μg/m3 (0) 31.0
 
March 30, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 1.3 μg/m3 (5) 30.0
 
March 30, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.2 μg/m3 (18) 30.0