AQSQID: 170314007

Site Name: Desplns

Location: Cook Co, IL

Reporting: True, Located: True

Current AQI: 33.0

Cook Co IL, US: 42.0603, -87.8631

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A N/A 33.0
 
May 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A N/A 35.0
 
May 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A N/A 34.0
 
May 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A N/A 33.0
 
May 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A N/A 32.0
 
May 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A N/A 30.0
 
May 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A N/A 28.0
 
May 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A N/A 27.0
 
May 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
May 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A N/A 25.0
 
May 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A N/A 23.0
 
May 23, 2019, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
May 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A N/A 17.0
 
May 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A N/A 20.0
 
May 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A N/A 25.0
 
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A N/A 18.0
 
May 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A N/A 20.0
 
May 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A N/A 21.0
 
May 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A N/A 22.0
 
May 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A N/A 25.0
 
May 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A N/A 29.0
 
May 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A N/A 32.0
 
May 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A N/A 36.0
 
May 23, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
May 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
May 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
May 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A N/A 45.0
 
May 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A N/A 45.0
 
May 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
May 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
May 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A N/A 39.0
 
May 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A N/A 38.0
 
May 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A N/A 33.0
 
May 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A N/A 22.0
 
May 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A N/A 12.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A N/A 8.0
 
May 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 7.7 μg/m3 (32) 32.0
 
May 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 8.7 μg/m3 (36) 36.0
 
May 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 7.9 μg/m3 (33) 33.0
 
May 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 15.8 μg/m3 (58) 58.0
 
May 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 13.1 μg/m3 (52) 52.0
 
May 22, 2019, 5 a.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
 
May 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A -0.9 μg/m3 (0) 23.0
 
May 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 4.0 μg/m3 (17) 21.0
 
May 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 3.1 μg/m3 (13) 18.0
 
May 22, 2019, 1 a.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
 
May 22, 2019, midnight N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.9 μg/m3 (25) 25.0
 
May 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 11.4 μg/m3 (48) 48.0
 
May 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 11.8 μg/m3 (49) 49.0
 
May 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 3.1 μg/m3 (13) 20.0
 
May 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A -1.1 μg/m3 (0) 25.0
 
May 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 6.5 μg/m3 (27) 27.0
 
May 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 8.1 μg/m3 (34) 34.0
 
May 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 30.9 μg/m3 (90) 90.0
 
May 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 37.6 μg/m3 (105) 105.0
 
May 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 17.1 μg/m3 (61) 61.0
 
May 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 10.9 μg/m3 (45) 45.0
 
May 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 28.4 μg/m3 (85) 85.0
 
May 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 30.3 μg/m3 (89) 89.0
 
May 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 18.8 μg/m3 (64) 64.0
 
May 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 11.4 μg/m3 (48) 48.0
 
May 18, 2019, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 4.9 μg/m3 (20) 20.0
 
May 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 7.4 μg/m3 (31) 31.0
 
May 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 6.6 μg/m3 (28) 28.0
 
May 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 2.4 μg/m3 (10) 20.0
 
May 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.9 μg/m3 (8) 21.0
 
May 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 2.2 μg/m3 (9) 21.0
 
May 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 3.0 μg/m3 (12) 21.0
 
May 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 2.8 μg/m3 (12) 22.0
 
May 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 1.5 μg/m3 (6) 22.0
 
May 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 1.5 μg/m3 (6) 21.0
 
May 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 4.2 μg/m3 (18) 19.0
 
May 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A -0.5 μg/m3 (0) 18.0
 
May 18, 2019, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 2.0 μg/m3 (8) 20.0
 
May 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 4.2 μg/m3 (18) 20.0
 
May 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A -2.3 μg/m3 (0) 20.0
 
May 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 2.2 μg/m3 (9) 20.0
 
May 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 0.9 μg/m3 (4) 20.0
 
May 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A -0.2 μg/m3 (0) 19.0
 
May 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 0.8 μg/m3 (3) 19.0
 
May 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 0.6 μg/m3 (2) 19.0
 
May 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 5.0 μg/m3 (21) 21.0
 
May 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 4.8 μg/m3 (20) 20.0
 
May 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 0.7 μg/m3 (3) 22.0
 
May 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 0.0 μg/m3 (0) 21.0
 
May 17, 2019, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 0.2 μg/m3 (1) 20.0
 
May 17, 2019, 11 a.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 (9) 22.0
 
May 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 0.9 μg/m3 (4) 24.0
 
May 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 5.8 μg/m3 (24) 28.0
 
May 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 14.6 μg/m3 (56) 56.0
 
May 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 17.3 μg/m3 (61) 61.0
 
May 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 15.1 μg/m3 (57) 57.0
 
May 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 16.0 μg/m3 (59) 59.0
 
May 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 11.7 μg/m3 (49) 49.0
 
May 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 15.2 μg/m3 (57) 57.0
 
May 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 20.3 μg/m3 (68) 68.0
 
May 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 23.1 μg/m3 (74) 74.0
 
May 17, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 19.3 μg/m3 (66) 66.0
 
May 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 11.4 μg/m3 (48) 48.0
 
May 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A -3.3 μg/m3 (0) 29.0
 
May 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 6.1 μg/m3 (25) 29.0
 
May 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 4.3 μg/m3 (18) 27.0
 
May 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 5.7 μg/m3 (24) 27.0
 
May 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 14.3 μg/m3 (55) 55.0
 
May 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 15.8 μg/m3 (58) 58.0
 
May 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 8.7 μg/m3 (36) 36.0
 
May 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 12.1 μg/m3 (50) 50.0
 
May 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 12.3 μg/m3 (51) 51.0
 
May 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 16.5 μg/m3 (60) 60.0
 
May 16, 2019, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 17.8 μg/m3 (62) 62.0
 
May 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 15.2 μg/m3 (57) 57.0
 
May 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 15.3 μg/m3 (57) 57.0
 
May 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 17.3 μg/m3 (61) 61.0
 
May 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 17.5 μg/m3 (62) 62.0
 
May 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 19.6 μg/m3 (66) 66.0
 
May 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 19.1 μg/m3 (65) 65.0
 
May 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 16.1 μg/m3 (59) 59.0
 
May 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 16.1 μg/m3 (59) 59.0
 
May 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 17.2 μg/m3 (61) 61.0
 
May 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 14.9 μg/m3 (56) 56.0
 
May 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 11.1 μg/m3 (46) 46.0
 
May 16, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 9.7 μg/m3 (40) 42.0
 
May 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 13.4 μg/m3 (53) 53.0
 
May 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A 12.3 μg/m3 (51) 51.0
 
May 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (50) N/A N/A 8.2 μg/m3 (34) 50.0
 
May 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (50) N/A N/A 9.5 μg/m3 (40) 50.0
 
May 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) N/A N/A 8.7 μg/m3 (36) 49.0
 
May 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A 6.3 μg/m3 (26) 45.0
 
May 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 8.9 μg/m3 (37) 42.0
 
May 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.6 μg/m3 (32) 39.0
 
May 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 9.2 μg/m3 (38) 38.0
 
May 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.5 μg/m3 (44) 44.0
 
May 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
May 15, 2019, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 17.7 μg/m3 (62) 62.0
 
May 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 18.9 μg/m3 (65) 65.0
 
May 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 18.4 μg/m3 (64) 64.0
 
May 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 20.2 μg/m3 (67) 67.0
 
May 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 19.0 μg/m3 (65) 65.0
 
May 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 9.7 μg/m3 (40) 40.0
 
May 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 11.1 μg/m3 (46) 46.0
 
May 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 15.6 μg/m3 (58) 58.0
 
May 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 10.2 μg/m3 (42) 42.0
 
May 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 10.3 μg/m3 (43) 43.0
 
May 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 8.0 μg/m3 (33) 33.0
 
May 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 4.4 μg/m3 (18) 32.0
 
May 15, 2019, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.1 μg/m3 (21) 38.0
 
May 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 3.6 μg/m3 (15) 39.0
 
May 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.0 μg/m3 (29) 39.0
 
May 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A -0.5 μg/m3 (0) 39.0
 
May 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 7.5 μg/m3 (31) 38.0
 
May 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.3 μg/m3 (14) 36.0
 
May 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.5 μg/m3 (15) 36.0
 
May 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.1 μg/m3 (21) 35.0
 
May 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 8.4 μg/m3 (35) 35.0
 
May 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 12.0 μg/m3 (50) 50.0
 
May 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.3 μg/m3 (22) 22.0
 
May 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 9.9 μg/m3 (41) 41.0
 
May 14, 2019, noon N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 18.9 μg/m3 (65) 65.0
 
May 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 23.3 μg/m3 (74) 74.0
 
May 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 15.7 μg/m3 (58) 58.0
 
May 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 20.1 μg/m3 (67) 67.0
 
May 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 15.4 μg/m3 (57) 57.0
 
May 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 19.3 μg/m3 (66) 66.0
 
May 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 18.5 μg/m3 (64) 64.0
 
May 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 11.4 μg/m3 (48) 48.0