AQSQID: 420450002

Site Name: Ches

Location: Chester, PA

Reporting: True, Located: True

Current AQI: 72.0

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. 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 22.5 μg/m3 (72) 72.0
 
Jan. 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 21.2 μg/m3 (70) 70.0
 
Jan. 20, 2019, noon N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 23.8 μg/m3 (75) 75.0
 
Jan. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 27.5 μg/m3 (83) 83.0
 
Jan. 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 20.3 μg/m3 (68) 68.0
 
Jan. 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 22.3 μg/m3 (72) 72.0
 
Jan. 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 21.3 μg/m3 (70) 70.0
 
Jan. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 21.7 μg/m3 (71) 71.0
 
Jan. 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 22.3 μg/m3 (72) 72.0
 
Jan. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 26.6 μg/m3 (81) 81.0
 
Jan. 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 29.6 μg/m3 (87) 87.0
 
Jan. 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 34.2 μg/m3 (97) 97.0
 
Jan. 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 36.2 μg/m3 (102) 102.0
 
Jan. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 33.9 μg/m3 (97) 97.0
 
Jan. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 34.6 μg/m3 (98) 98.0
 
Jan. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 33.7 μg/m3 (96) 96.0
 
Jan. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 31.1 μg/m3 (91) 91.0
 
Jan. 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 25.8 μg/m3 (79) 79.0
 
Jan. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 27.4 μg/m3 (83) 83.0
 
Jan. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 23.7 μg/m3 (75) 75.0
 
Jan. 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 24.0 μg/m3 (76) 76.0
 
Jan. 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 25.0 μg/m3 (78) 78.0
 
Jan. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 26.9 μg/m3 (82) 82.0
 
Jan. 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 30.4 μg/m3 (89) 89.0
 
Jan. 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 33.1 μg/m3 (95) 95.0
 
Jan. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 37.9 μg/m3 (106) 106.0
 
Jan. 19, 2019, noon N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A 37.1 μg/m3 (104) 104.0
 
Jan. 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 41.5 μg/m3 (115) 115.0
 
Jan. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 43.3 μg/m3 (120) 120.0
 
Jan. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 44.0 μg/m3 (121) 121.0
 
Jan. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 44.2 μg/m3 (122) 122.0
 
Jan. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 50.7 μg/m3 (138) 138.0
 
Jan. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 56.6 μg/m3 (151) 151.0
 
Jan. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 58.4 μg/m3 (152) 152.0
 
Jan. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 59.6 μg/m3 (152) 152.0
 
Jan. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 57.1 μg/m3 (151) 151.0
 
Jan. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 53.6 μg/m3 (145) 145.0
 
Jan. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 50.2 μg/m3 (137) 137.0
 
Jan. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 47.3 μg/m3 (130) 130.0
 
Jan. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 45.9 μg/m3 (126) 126.0
 
Jan. 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 40.5 μg/m3 (112) 112.0
 
Jan. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A 39.8 μg/m3 (111) 111.0
 
Jan. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 36.9 μg/m3 (104) 104.0
 
Jan. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A 42.2 μg/m3 (117) 117.0
 
Jan. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A N/A 3.0
 
Jan. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A N/A 3.0
 
Jan. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 18, 2019, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A N/A 11.0
 
Jan. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A N/A 14.0
 
Jan. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A N/A 8.0
 
Jan. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
Jan. 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 N/A 22.0
 
Jan. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A N/A 24.0
 
Jan. 18, 2019, 2 a.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
 
Jan. 18, 2019, 1 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
 
Jan. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A N/A 21.0
 
Jan. 17, 2019, 11 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
 
Jan. 17, 2019, 10 p.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
 
Jan. 17, 2019, 9 p.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
 
Jan. 17, 2019, 8 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
 
Jan. 17, 2019, 7 p.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
 
Jan. 17, 2019, 6 p.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
 
Jan. 17, 2019, 5 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
 
Jan. 17, 2019, 4 p.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
 
Jan. 17, 2019, 3 p.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
 
Jan. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 17, 2019, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A N/A 9.0
 
Jan. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A N/A 16.0
 
Jan. 17, 2019, 7 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
 
Jan. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A N/A N/A 9.0
 
Jan. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A N/A 11.0
 
Jan. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A N/A 13.0
 
Jan. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A N/A 17.0
 
Jan. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A N/A 12.0
 
Jan. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A N/A 14.0
 
Jan. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A N/A 16.0
 
Jan. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A N/A 13.0
 
Jan. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A N/A 7.0
 
Jan. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A N/A 4.0
 
Jan. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 16, 2019, noon N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A N/A
Jan. 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 1.0
 
Jan. 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 1.0
 
Jan. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 1.0
 
Jan. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A N/A 3.0
 
Jan. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A N/A 8.0
 
Jan. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A N/A 10.0
 
Jan. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
Jan. 15, 2019, 7 p.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
 
Jan. 15, 2019, 6 p.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
 
Jan. 15, 2019, 5 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
 
Jan. 15, 2019, 4 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
 
Jan. 15, 2019, 3 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
 
Jan. 15, 2019, 2 p.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
 
Jan. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 15, 2019, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 1.0
 
Jan. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 1.0
 
Jan. 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 N/A 1.0
 
Jan. 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 N/A N/A
Jan. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A N/A 4.0
 
Jan. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 2.0
 
Jan. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A N/A 4.0
 
Jan. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A N/A N/A 5.0
 
Jan. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A N/A 8.0
 
Jan. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A N/A 8.0
 
Jan. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A N/A 7.0
 
Jan. 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A N/A 8.0
 
Jan. 14, 2019, 9 p.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
 
Jan. 14, 2019, 8 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
 
Jan. 14, 2019, 7 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
 
Jan. 14, 2019, 6 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
 
Jan. 14, 2019, 5 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
 
Jan. 14, 2019, 4 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
 
Jan. 14, 2019, 3 p.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
 
Jan. 14, 2019, 2 p.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
 
Jan. 14, 2019, 1 p.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
 
Jan. 14, 2019, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 14, 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
 
Jan. 14, 2019, 9 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
 
Jan. 14, 2019, 8 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
 
Jan. 14, 2019, 7 a.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
 
Jan. 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Jan. 14, 2019, 5 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
 
Jan. 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
Jan. 14, 2019, 3 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
 
Jan. 14, 2019, 2 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
 
Jan. 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 14, 2019, midnight N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A N/A 15.0
 
Jan. 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A N/A 12.0
 
Jan. 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A N/A 11.0
 
Jan. 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A N/A 13.0
 
Jan. 13, 2019, 8 p.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
 
Jan. 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
Jan. 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A N/A 19.0
 
Jan. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A N/A 18.0
 
Jan. 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A N/A 15.0