AQSQID: 420450002

Site Name: Chester

Location: Chester (S Chester), PA

Reporting: True, Located: True

Current AQI: 35.0

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
April 2, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 5.5 μg/m3 (23) 35.0
 
April 2, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 6.7 μg/m3 (28) 35.0
 
April 2, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
April 2, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
April 2, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 5.6 μg/m3 (23) 27.0
 
April 2, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
April 2, 2020, noon N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 6.6 μg/m3 (28) 32.0
 
April 2, 2020, 11 a.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
 
April 2, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 6.3 μg/m3 (26) 27.0
 
April 2, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.2 μg/m3 (26) 28.0
 
April 2, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 5.8 μg/m3 (24) 30.0
 
April 2, 2020, 7 a.m. 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 2, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.6 μg/m3 (23) 23.0
 
April 2, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 5.5 μg/m3 (23) 33.0
 
April 2, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 5.6 μg/m3 (23) 34.0
 
April 2, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.2 μg/m3 (22) 35.0
 
April 2, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 5.6 μg/m3 (23) 33.0
 
April 2, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 5.5 μg/m3 (23) 29.0
 
April 2, 2020, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 5.3 μg/m3 (22) 28.0
 
April 1, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 4.7 μg/m3 (20) 32.0
 
April 1, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 5.2 μg/m3 (22) 32.0
 
April 1, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 7.6 μg/m3 (32) 33.0
 
April 1, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 8.3 μg/m3 (35) 35.0
 
April 1, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 7.8 μg/m3 (32) 36.0
 
April 1, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 8.4 μg/m3 (35) 36.0
 
April 1, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 8.8 μg/m3 (37) 37.0
 
April 1, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 8.3 μg/m3 (35) 35.0
 
April 1, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 9.1 μg/m3 (38) 38.0
 
April 1, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 9.5 μg/m3 (40) 40.0
 
April 1, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 9.7 μg/m3 (40) 40.0
 
April 1, 2020, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 14.4 μg/m3 (55) 55.0
 
April 1, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 14.5 μg/m3 (55) 55.0
 
April 1, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 12.6 μg/m3 (51) 51.0
 
April 1, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 10.9 μg/m3 (45) 45.0
 
April 1, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 13.5 μg/m3 (53) 53.0
 
April 1, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 13.8 μg/m3 (54) 54.0
 
April 1, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.6 μg/m3 (48) 48.0
 
April 1, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 8.1 μg/m3 (34) 34.0
 
April 1, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.3 μg/m3 (30) 30.0
 
April 1, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 8.0 μg/m3 (33) 33.0
 
April 1, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 6.3 μg/m3 (26) 29.0
 
April 1, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 5.2 μg/m3 (22) 32.0
 
April 1, 2020, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 6.2 μg/m3 (26) 31.0
 
March 31, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 31, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 6.6 μg/m3 (28) 31.0
 
March 31, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 7.0 μg/m3 (29) 31.0
 
March 31, 2020, 8 p.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, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 4.7 μg/m3 (20) 28.0
 
March 31, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 5.1 μg/m3 (21) 28.0
 
March 31, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 4.5 μg/m3 (19) 28.0
 
March 31, 2020, 4 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 (14) 29.0
 
March 31, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 3.2 μg/m3 (13) 30.0
 
March 31, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 3.0 μg/m3 (12) 31.0
 
March 31, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 2.8 μg/m3 (12) 28.0
 
March 31, 2020, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
March 31, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 31, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 5.8 μg/m3 (24) 24.0
 
March 31, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 31, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 12.6 μg/m3 (51) 51.0
 
March 31, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
March 31, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 5.5 μg/m3 (23) 23.0
 
March 31, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 6.1 μg/m3 (25) 25.0
 
March 31, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 31, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 31, 2020, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 17.4 μg/m3 (61) 61.0
 
March 30, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 22.3 μg/m3 (72) 72.0
 
March 30, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 17.8 μg/m3 (62) 62.0
 
March 30, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 18.7 μg/m3 (64) 64.0
 
March 30, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 30, 2020, 7 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
 
March 30, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 13.8 μg/m3 (54) 54.0
 
March 30, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 30, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 30, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 13.8 μg/m3 (54) 54.0
 
March 30, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 30, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 30, 2020, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 14.5 μg/m3 (55) 55.0
 
March 30, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 30, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 16.9 μg/m3 (60) 60.0
 
March 30, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 13.8 μg/m3 (54) 54.0
 
March 30, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 12.7 μg/m3 (51) 51.0
 
March 30, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 30, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.2 μg/m3 (42) 42.0
 
March 30, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 12.9 μg/m3 (52) 52.0
 
March 30, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 14.4 μg/m3 (55) 55.0
 
March 30, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 30, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 17.9 μg/m3 (63) 63.0
 
March 30, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 17.6 μg/m3 (62) 62.0
 
March 30, 2020, midnight N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 18.7 μg/m3 (64) 64.0
 
March 29, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 23.3 μg/m3 (74) 74.0
 
March 29, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 19.6 μg/m3 (66) 66.0
 
March 29, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 17.8 μg/m3 (62) 62.0
 
March 29, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 17.8 μg/m3 (62) 62.0
 
March 29, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 15.7 μg/m3 (58) 58.0
 
March 29, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 16.9 μg/m3 (60) 60.0
 
March 29, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 12.7 μg/m3 (51) 51.0
 
March 29, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 10.6 μg/m3 (44) 44.0
 
March 29, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 11.1 μg/m3 (46) 46.0
 
March 29, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 29, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 11.3 μg/m3 (47) 47.0
 
March 29, 2020, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 8.4 μg/m3 (35) 35.0
 
March 29, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 29, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 15.1 μg/m3 (57) 57.0
 
March 29, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 29, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 29, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 11.1 μg/m3 (46) 46.0
 
March 29, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.5 μg/m3 (40) 40.0
 
March 29, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 29, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 12.3 μg/m3 (51) 51.0
 
March 29, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 13.1 μg/m3 (52) 52.0
 
March 29, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 12.3 μg/m3 (51) 51.0
 
March 29, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 11.3 μg/m3 (47) 47.0
 
March 29, 2020, midnight 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
 
March 28, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 11.3 μg/m3 (47) 47.0
 
March 28, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 28, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 8.5 μg/m3 (35) 35.0
 
March 28, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 8.5 μg/m3 (35) 35.0
 
March 28, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 28, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 28, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 6.6 μg/m3 (28) 35.0
 
March 28, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 9.7 μg/m3 (40) 40.0
 
March 28, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 28, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 14.6 μg/m3 (56) 56.0
 
March 28, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 15.6 μg/m3 (58) 58.0
 
March 28, 2020, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 16.3 μg/m3 (59) 59.0
 
March 28, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 19.7 μg/m3 (66) 66.0
 
March 28, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 19.6 μg/m3 (66) 66.0
 
March 28, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 21.7 μg/m3 (71) 71.0
 
March 28, 2020, 8 a.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
 
March 28, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 16.1 μg/m3 (59) 59.0
 
March 28, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.1 μg/m3 (46) 46.0
 
March 28, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 28, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 20.2 μg/m3 (67) 67.0
 
March 28, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 19.1 μg/m3 (65) 65.0
 
March 28, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 18.1 μg/m3 (63) 63.0
 
March 28, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 17.4 μg/m3 (61) 61.0
 
March 28, 2020, midnight N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 27, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 27, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.5 μg/m3 (27) 37.0
 
March 27, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 6.9 μg/m3 (29) 38.0
 
March 27, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.4 μg/m3 (35) 37.0
 
March 27, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 27, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 27, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 11.6 μg/m3 (48) 48.0
 
March 27, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 27, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 27, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 13.1 μg/m3 (52) 52.0
 
March 27, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 13.6 μg/m3 (53) 53.0
 
March 27, 2020, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 16.1 μg/m3 (59) 59.0
 
March 27, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 16.9 μg/m3 (60) 60.0
 
March 27, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 15.1 μg/m3 (57) 57.0
 
March 27, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 12.9 μg/m3 (52) 52.0
 
March 27, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 27, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 27, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.4 μg/m3 (51) 51.0
 
March 27, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 27, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 27, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 27, 2020, 2 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
 
March 27, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 27, 2020, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 26, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 10.1 μg/m3 (42) 42.0
 
March 26, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 26, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 26, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 18.3 μg/m3 (63) 63.0
 
March 26, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 15.8 μg/m3 (58) 58.0