AQSQID: 420450002

Site Name: Chester

Location: Chester (S Chester), PA

Reporting: True, Located: True

Current AQI: 97.0

Chester (S Chester) PA, US: 39.8356, -75.3725

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 24, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 34.0 μg/m3 (97) 97.0
 
Jan. 24, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 40.5 μg/m3 (112) 112.0
 
Jan. 24, 2020, midnight N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 35.2 μg/m3 (99) 99.0
 
Jan. 23, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 33.9 μg/m3 (97) 97.0
 
Jan. 23, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 31.5 μg/m3 (91) 91.0
 
Jan. 23, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 36.9 μg/m3 (104) 104.0
 
Jan. 23, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A 31.9 μg/m3 (92) 92.0
 
Jan. 23, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 32.4 μg/m3 (93) 93.0
 
Jan. 23, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 34.0 μg/m3 (97) 97.0
 
Jan. 23, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 28.5 μg/m3 (85) 85.0
 
Jan. 23, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 33.2 μg/m3 (95) 95.0
 
Jan. 23, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 39.5 μg/m3 (110) 110.0
 
Jan. 23, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 42.0 μg/m3 (116) 116.0
 
Jan. 23, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 42.2 μg/m3 (117) 117.0
 
Jan. 23, 2020, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 41.2 μg/m3 (114) 114.0
 
Jan. 23, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 37.2 μg/m3 (104) 104.0
 
Jan. 23, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 36.3 μg/m3 (102) 102.0
 
Jan. 23, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 34.9 μg/m3 (99) 99.0
 
Jan. 23, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 35.9 μg/m3 (101) 101.0
 
Jan. 23, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 35.0 μg/m3 (99) 99.0
 
Jan. 23, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 32.6 μg/m3 (94) 94.0
 
Jan. 23, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 31.2 μg/m3 (91) 91.0
 
Jan. 23, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 35.7 μg/m3 (100) 100.0
 
Jan. 23, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 32.1 μg/m3 (93) 93.0
 
Jan. 23, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 29.4 μg/m3 (87) 87.0
 
Jan. 23, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 28.1 μg/m3 (84) 84.0
 
Jan. 23, 2020, midnight N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 23.3 μg/m3 (74) 74.0
 
Jan. 22, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 25.6 μg/m3 (79) 79.0
 
Jan. 22, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 17.9 μg/m3 (63) 63.0
 
Jan. 22, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 15.0 μg/m3 (56) 56.0
 
Jan. 22, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 16.1 μg/m3 (59) 59.0
 
Jan. 22, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 15.3 μg/m3 (57) 57.0
 
Jan. 22, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 12.1 μg/m3 (50) 50.0
 
Jan. 22, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 14.1 μg/m3 (54) 54.0
 
Jan. 22, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 12.6 μg/m3 (51) 51.0
 
Jan. 22, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 15.1 μg/m3 (57) 57.0
 
Jan. 22, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 16.6 μg/m3 (60) 60.0
 
Jan. 22, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 18.2 μg/m3 (63) 63.0
 
Jan. 22, 2020, noon N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 17.1 μg/m3 (61) 61.0
 
Jan. 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 15.6 μg/m3 (58) 58.0
 
Jan. 22, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A 18.1 μg/m3 (63) 63.0
 
Jan. 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 18.9 μg/m3 (65) 65.0
 
Jan. 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 18.1 μg/m3 (63) 63.0
 
Jan. 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 15.5 μg/m3 (57) 57.0
 
Jan. 22, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 15.3 μg/m3 (57) 57.0
 
Jan. 22, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 14.4 μg/m3 (55) 55.0
 
Jan. 22, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 15.9 μg/m3 (58) 58.0
 
Jan. 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 12.6 μg/m3 (51) 51.0
 
Jan. 22, 2020, midnight N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 11.3 μg/m3 (47) 47.0
 
Jan. 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 13.7 μg/m3 (54) 54.0
 
Jan. 21, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 21, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 6.5 μg/m3 (27) 27.0
 
Jan. 21, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 7.2 μg/m3 (30) 30.0
 
Jan. 21, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 6.9 μg/m3 (29) 29.0
 
Jan. 21, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 21, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.9 μg/m3 (29) 29.0
 
Jan. 21, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 21, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 21, 2020, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 8.4 μg/m3 (35) 35.0
 
Jan. 21, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
Jan. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 5.8 μg/m3 (24) 25.0
 
Jan. 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.1 μg/m3 (21) 21.0
 
Jan. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
Jan. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 8.9 μg/m3 (37) 37.0
 
Jan. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 9.9 μg/m3 (41) 41.0
 
Jan. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.2 μg/m3 (22) 22.0
 
Jan. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 4.0 μg/m3 (17) 27.0
 
Jan. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 3.6 μg/m3 (15) 29.0
 
Jan. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.4 μg/m3 (14) 32.0
 
Jan. 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.6 μg/m3 (15) 32.0
 
Jan. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.5 μg/m3 (15) 32.0
 
Jan. 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.5 μg/m3 (15) 32.0
 
Jan. 20, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 3.2 μg/m3 (13) 31.0
 
Jan. 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 3.6 μg/m3 (15) 30.0
 
Jan. 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 3.9 μg/m3 (16) 28.0
 
Jan. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 4.0 μg/m3 (17) 27.0
 
Jan. 20, 2020, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 4.1 μg/m3 (17) 25.0
 
Jan. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 3.7 μg/m3 (15) 27.0
 
Jan. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.8 μg/m3 (16) 28.0
 
Jan. 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 4.2 μg/m3 (18) 27.0
 
Jan. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.7 μg/m3 (56) 56.0
 
Jan. 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 14.9 μg/m3 (56) 56.0
 
Jan. 20, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 15.2 μg/m3 (57) 57.0
 
Jan. 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 15.9 μg/m3 (58) 58.0
 
Jan. 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 16.6 μg/m3 (60) 60.0
 
Jan. 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 15.9 μg/m3 (58) 58.0
 
Jan. 20, 2020, midnight N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 15.9 μg/m3 (58) 58.0
 
Jan. 19, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 14.3 μg/m3 (55) 55.0
 
Jan. 19, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 12.9 μg/m3 (52) 52.0
 
Jan. 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 11.7 μg/m3 (49) 49.0
 
Jan. 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 8.5 μg/m3 (35) 35.0
 
Jan. 19, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 7.6 μg/m3 (32) 32.0
 
Jan. 19, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 10.4 μg/m3 (43) 43.0
 
Jan. 19, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 11.1 μg/m3 (46) 46.0
 
Jan. 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 9.5 μg/m3 (40) 40.0
 
Jan. 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 12.3 μg/m3 (51) 51.0
 
Jan. 19, 2020, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 13.1 μg/m3 (52) 52.0
 
Jan. 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 12.6 μg/m3 (51) 51.0
 
Jan. 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 12.8 μg/m3 (52) 52.0
 
Jan. 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 12.9 μg/m3 (52) 52.0
 
Jan. 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 11.9 μg/m3 (50) 50.0
 
Jan. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 11.2 μg/m3 (47) 47.0
 
Jan. 19, 2020, 6 a.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
 
Jan. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 19, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 8.7 μg/m3 (36) 36.0
 
Jan. 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 8.3 μg/m3 (35) 35.0
 
Jan. 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 6.9 μg/m3 (29) 29.0
 
Jan. 19, 2020, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 18, 2020, 11 p.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
 
Jan. 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 8.2 μg/m3 (34) 34.0
 
Jan. 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 7.7 μg/m3 (32) 32.0
 
Jan. 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 18, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 7.2 μg/m3 (30) 30.0
 
Jan. 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 7.9 μg/m3 (33) 33.0
 
Jan. 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 7.9 μg/m3 (33) 33.0
 
Jan. 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 8.7 μg/m3 (36) 36.0
 
Jan. 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 8.3 μg/m3 (35) 35.0
 
Jan. 18, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 8.5 μg/m3 (35) 35.0
 
Jan. 18, 2020, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 6.4 μg/m3 (27) 27.0
 
Jan. 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 18, 2020, 10 a.m. 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
 
Jan. 18, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 6.5 μg/m3 (27) 27.0
 
Jan. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 7.5 μg/m3 (31) 31.0
 
Jan. 18, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 18, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 8.4 μg/m3 (35) 35.0
 
Jan. 18, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 9.4 μg/m3 (39) 39.0
 
Jan. 18, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 11.1 μg/m3 (46) 46.0
 
Jan. 18, 2020, 2 a.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
 
Jan. 18, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 18, 2020, midnight N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 6.4 μg/m3 (27) 27.0
 
Jan. 17, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 17, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 4.8 μg/m3 (20) 25.0
 
Jan. 17, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 4.4 μg/m3 (18) 28.0
 
Jan. 17, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 4.6 μg/m3 (19) 28.0
 
Jan. 17, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 5.0 μg/m3 (21) 27.0
 
Jan. 17, 2020, 5 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
 
Jan. 17, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 17, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 9.3 μg/m3 (39) 39.0
 
Jan. 17, 2020, noon 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
 
Jan. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 6.4 μg/m3 (27) 27.0
 
Jan. 17, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
Jan. 17, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
Jan. 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 4.2 μg/m3 (18) 22.0
 
Jan. 17, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 3.4 μg/m3 (14) 23.0
 
Jan. 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.1 μg/m3 (13) 13.0
 
Jan. 17, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 2.9 μg/m3 (12) 24.0
 
Jan. 17, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 3.3 μg/m3 (14) 24.0
 
Jan. 17, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 3.7 μg/m3 (15) 25.0