ID: 712

AQSQID: 420450002

Site Name: Chester

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

Updated: Jan. 23, 2021, 7:31 p.m.

Location: Chester (S Chester), PA

Reporting: True, Located: True

Current AQI: 32.0

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. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 12.3 μg/m3 (52) 52.0
 
Jan. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 7.8 μg/m3 (33) 33.0
 
Jan. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 4.9 μg/m3 (21) 29.0
 
Jan. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.2 μg/m3 (22) 27.0
 
Jan. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
Jan. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2021, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 10.9 μg/m3 (46) 46.0
 
Jan. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 10.7 μg/m3 (45) 45.0
 
Jan. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 8.9 μg/m3 (38) 38.0
 
Jan. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 14.6 μg/m3 (57) 57.0
 
Jan. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 15.5 μg/m3 (59) 59.0
 
Jan. 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.6 μg/m3 (57) 57.0
 
Jan. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 14.5 μg/m3 (57) 57.0
 
Jan. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 13.0 μg/m3 (53) 53.0
 
Jan. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 10.4 μg/m3 (44) 44.0
 
Jan. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 10.4 μg/m3 (44) 44.0
 
Jan. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 10.9 μg/m3 (46) 46.0
 
Jan. 16, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 9.5 μg/m3 (40) 40.0
 
Jan. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.4 μg/m3 (31) 40.0
 
Jan. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.8 μg/m3 (33) 40.0
 
Jan. 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 8.3 μg/m3 (35) 40.0
 
Jan. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 17.3 μg/m3 (62) 62.0
 
Jan. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 31.4 μg/m3 (92) 92.0
 
Jan. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 35.1 μg/m3 (100) 100.0
 
Jan. 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 38.2 μg/m3 (108) 108.0
 
Jan. 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 36.8 μg/m3 (105) 105.0
 
Jan. 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 34.5 μg/m3 (99) 99.0
 
Jan. 15, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 30.0 μg/m3 (89) 89.0
 
Jan. 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 31.0 μg/m3 (91) 91.0
 
Jan. 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 28.9 μg/m3 (87) 87.0
 
Jan. 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 26.6 μg/m3 (82) 82.0
 
Jan. 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 25.9 μg/m3 (81) 81.0
 
Jan. 15, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 26.6 μg/m3 (82) 82.0
 
Jan. 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 27.2 μg/m3 (83) 83.0
 
Jan. 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 27.2 μg/m3 (83) 83.0
 
Jan. 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 26.9 μg/m3 (83) 83.0
 
Jan. 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 29.8 μg/m3 (89) 89.0
 
Jan. 15, 2021, 2 a.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 (92) 92.0
 
Jan. 15, 2021, 1 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 (88) 88.0
 
Jan. 15, 2021, midnight N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 24.8 μg/m3 (78) 78.0
 
Jan. 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 24.4 μg/m3 (77) 77.0
 
Jan. 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 21.9 μg/m3 (72) 72.0
 
Jan. 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 16.1 μg/m3 (60) 60.0
 
Jan. 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 16.9 μg/m3 (62) 62.0
 
Jan. 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 15.9 μg/m3 (59) 59.0
 
Jan. 14, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 20.5 μg/m3 (69) 69.0
 
Jan. 14, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 26.7 μg/m3 (82) 82.0
 
Jan. 14, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A 35.1 μg/m3 (100) 100.0
 
Jan. 14, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 35.8 μg/m3 (102) 102.0
 
Jan. 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 32.0 μg/m3 (93) 93.0
 
Jan. 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 28.7 μg/m3 (86) 86.0
 
Jan. 14, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 27.4 μg/m3 (84) 84.0
 
Jan. 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 26.4 μg/m3 (82) 82.0
 
Jan. 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 25.9 μg/m3 (81) 81.0
 
Jan. 14, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 26.4 μg/m3 (82) 82.0
 
Jan. 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 26.9 μg/m3 (83) 83.0
 
Jan. 14, 2021, 7 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
 
Jan. 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 23.2 μg/m3 (75) 75.0
 
Jan. 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 32.9 μg/m3 (95) 95.0
 
Jan. 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 45.6 μg/m3 (126) 126.0
 
Jan. 13, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 42.0 μg/m3 (118) 118.0
 
Jan. 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 40.3 μg/m3 (113) 113.0
 
Jan. 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 39.1 μg/m3 (110) 110.0
 
Jan. 13, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 38.9 μg/m3 (110) 110.0
 
Jan. 13, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 37.0 μg/m3 (105) 105.0
 
Jan. 13, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 36.9 μg/m3 (105) 105.0
 
Jan. 13, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 37.5 μg/m3 (106) 106.0
 
Jan. 13, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 36.7 μg/m3 (104) 104.0
 
Jan. 13, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 35.8 μg/m3 (102) 102.0
 
Jan. 13, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 35.5 μg/m3 (101) 101.0
 
Jan. 13, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 34.1 μg/m3 (98) 98.0
 
Jan. 13, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 34.5 μg/m3 (99) 99.0
 
Jan. 13, 2021, midnight N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A N/A 34.3 μg/m3 (98) 98.0
 
Jan. 12, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 31.5 μg/m3 (92) 92.0
 
Jan. 12, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 31.9 μg/m3 (93) 93.0
 
Jan. 12, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 30.1 μg/m3 (89) 89.0
 
Jan. 12, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 28.6 μg/m3 (86) 86.0
 
Jan. 12, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 27.0 μg/m3 (83) 83.0
 
Jan. 12, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 28.0 μg/m3 (85) 85.0
 
Jan. 12, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 27.8 μg/m3 (85) 85.0
 
Jan. 12, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 29.8 μg/m3 (89) 89.0
 
Jan. 12, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 30.0 μg/m3 (89) 89.0
 
Jan. 12, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 33.8 μg/m3 (97) 97.0
 
Jan. 12, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 36.7 μg/m3 (104) 104.0
 
Jan. 12, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 34.7 μg/m3 (99) 99.0
 
Jan. 12, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 33.3 μg/m3 (96) 96.0
 
Jan. 12, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 31.7 μg/m3 (93) 93.0
 
Jan. 12, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 33.7 μg/m3 (97) 97.0
 
Jan. 12, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 35.3 μg/m3 (100) 100.0
 
Jan. 12, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 33.5 μg/m3 (97) 97.0
 
Jan. 12, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 33.3 μg/m3 (96) 96.0
 
Jan. 12, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 26.0 μg/m3 (81) 81.0
 
Jan. 12, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 25.5 μg/m3 (80) 80.0
 
Jan. 12, 2021, midnight N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 22.6 μg/m3 (74) 74.0
 
Jan. 11, 2021, 11 p.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
 
Jan. 11, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 18.1 μg/m3 (64) 64.0
 
Jan. 11, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 15.3 μg/m3 (58) 58.0
 
Jan. 11, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 15.1 μg/m3 (58) 58.0
 
Jan. 11, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 15.7 μg/m3 (59) 59.0
 
Jan. 11, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 16.0 μg/m3 (60) 60.0
 
Jan. 11, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 18.4 μg/m3 (65) 65.0
 
Jan. 11, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 20.3 μg/m3 (69) 69.0
 
Jan. 11, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 20.9 μg/m3 (70) 70.0
 
Jan. 11, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 19.8 μg/m3 (68) 68.0
 
Jan. 11, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 20.2 μg/m3 (69) 69.0
 
Jan. 11, 2021, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 25.3 μg/m3 (79) 79.0
 
Jan. 11, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 22.5 μg/m3 (73) 73.0
 
Jan. 11, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 20.5 μg/m3 (69) 69.0
 
Jan. 11, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 23.4 μg/m3 (75) 75.0
 
Jan. 11, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 23.8 μg/m3 (76) 76.0
 
Jan. 11, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 25.2 μg/m3 (79) 79.0
 
Jan. 11, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (79) 79.0
 
Jan. 11, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 22.9 μg/m3 (74) 74.0
 
Jan. 11, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 25.2 μg/m3 (79) 79.0
 
Jan. 11, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 24.7 μg/m3 (78) 78.0
 
Jan. 11, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 21.5 μg/m3 (71) 71.0
 
Jan. 11, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 17.7 μg/m3 (63) 63.0
 
Jan. 11, 2021, midnight N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 10, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 10.2 μg/m3 (43) 43.0
 
Jan. 10, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 7.5 μg/m3 (32) 32.0
 
Jan. 10, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.2 μg/m3 (26) 32.0
 
Jan. 10, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.3 μg/m3 (23) 34.0
 
Jan. 10, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.1 μg/m3 (22) 34.0
 
Jan. 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
Jan. 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.3 μg/m3 (23) 34.0
 
Jan. 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 4.5 μg/m3 (19) 33.0
 
Jan. 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 4.4 μg/m3 (19) 33.0
 
Jan. 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 4.8 μg/m3 (20) 30.0
 
Jan. 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 5.1 μg/m3 (22) 22.0
 
Jan. 10, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 4.6 μg/m3 (20) 20.0
 
Jan. 10, 2021, 11 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
 
Jan. 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.6 μg/m3 (16) 26.0
 
Jan. 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.5 μg/m3 (15) 29.0
 
Jan. 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.4 μg/m3 (15) 32.0
 
Jan. 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.5 μg/m3 (15) 33.0
 
Jan. 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.4 μg/m3 (15) 15.0
 
Jan. 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.3 μg/m3 (14) 35.0
 
Jan. 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.3 μg/m3 (14) 36.0
 
Jan. 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.6 μg/m3 (16) 35.0
 
Jan. 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
Jan. 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
Jan. 10, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.3 μg/m3 (14) 37.0
 
Jan. 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.7 μg/m3 (16) 37.0
 
Jan. 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.6 μg/m3 (16) 35.0
 
Jan. 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
Jan. 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 2.8 μg/m3 (12) 38.0
 
Jan. 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
Jan. 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 3.1 μg/m3 (13) 37.0
 
Jan. 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.1 μg/m3 (13) 37.0
 
Jan. 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 3.2 μg/m3 (14) 35.0
 
Jan. 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.4 μg/m3 (15) 33.0
 
Jan. 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.2 μg/m3 (14) 32.0
 
Jan. 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.5 μg/m3 (15) 30.0
 
Jan. 9, 2021, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.7 μg/m3 (16) 28.0
 
Jan. 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 4.8 μg/m3 (20) 28.0
 
Jan. 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.0 μg/m3 (21) 27.0
 
Jan. 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.8 μg/m3 (25) 27.0
 
Jan. 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 5.9 μg/m3 (25) 27.0
 
Jan. 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 6.0 μg/m3 (25) 26.0
 
Jan. 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.8 μg/m3 (29) 29.0
 
Jan. 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 9.2 μg/m3 (39) 39.0
 
Jan. 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 9.6 μg/m3 (40) 40.0
 
Jan. 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 10.6 μg/m3 (45) 45.0
 
Jan. 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 15.2 μg/m3 (58) 58.0