AQSQID: 420450002

Site Name: Ches

Location: Chester, PA

Reporting: True, Located: True

Current AQI: 68.0

Chester PA, US: 39.8356, -75.3725

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 20.5 μg/m3 (68) 68.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 20.2 μg/m3 (67) 67.0
 
March 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 20.6 μg/m3 (68) 68.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 20.3 μg/m3 (68) 68.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 20.6 μg/m3 (68) 68.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 17.3 μg/m3 (61) 61.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A N/A 15.2 μg/m3 (57) 57.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 12.9 μg/m3 (52) 52.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 12.1 μg/m3 (50) 50.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 8 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
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 18, 2019, 6 p.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
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 5.3 μg/m3 (22) 29.0
 
March 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 5.2 μg/m3 (22) 28.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 5.0 μg/m3 (21) 25.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 4.4 μg/m3 (18) 24.0
 
March 18, 2019, 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
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.1 μg/m3 (21) 22.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 4.7 μg/m3 (20) 20.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 4.5 μg/m3 (19) 19.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 4.7 μg/m3 (20) 21.0
 
March 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 5.5 μg/m3 (23) 23.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 6.2 μg/m3 (26) 26.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.9 μg/m3 (29) 29.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A N/A 7.1 μg/m3 (30) 30.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 5.1 μg/m3 (21) 27.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 5.4 μg/m3 (23) 28.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 4.8 μg/m3 (20) 31.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.1 μg/m3 (21) 36.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 5.7 μg/m3 (24) 35.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.1 μg/m3 (25) 36.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 6.4 μg/m3 (27) 35.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 6.7 μg/m3 (28) 34.0
 
March 17, 2019, 5 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
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 6.4 μg/m3 (27) 32.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 5.7 μg/m3 (24) 31.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 4.8 μg/m3 (20) 32.0
 
March 17, 2019, 1 p.m. 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
 
March 17, 2019, noon 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
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 4.6 μg/m3 (19) 25.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 4.2 μg/m3 (18) 25.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.7 μg/m3 (15) 25.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 3.5 μg/m3 (15) 27.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 3.4 μg/m3 (14) 27.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.5 μg/m3 (15) 15.0
 
March 17, 2019, 5 a.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
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.1 μg/m3 (13) 34.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.1 μg/m3 (17) 33.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.4 μg/m3 (18) 33.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 4.8 μg/m3 (20) 32.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 5.1 μg/m3 (21) 33.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
March 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 6.3 μg/m3 (26) 33.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 7.7 μg/m3 (32) 33.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 16, 2019, 6 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 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 7.0 μg/m3 (29) 35.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 7.7 μg/m3 (32) 34.0
 
March 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 5.1 μg/m3 (21) 30.0
 
March 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.5 μg/m3 (15) 28.0
 
March 16, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 3.4 μg/m3 (14) 26.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 3.2 μg/m3 (13) 26.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 2.9 μg/m3 (12) 27.0
 
March 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 2.4 μg/m3 (10) 29.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 2.5 μg/m3 (10) 29.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 2.5 μg/m3 (10) 28.0
 
March 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.6 μg/m3 (19) 19.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
March 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 4.2 μg/m3 (18) 32.0
 
March 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.4 μg/m3 (18) 33.0
 
March 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 5.6 μg/m3 (23) 32.0
 
March 16, 2019, 1 a.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
 
March 16, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 15, 2019, 11 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 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 9.4 μg/m3 (39) 39.0
 
March 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 4 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
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.8 μg/m3 (32) 32.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 8.5 μg/m3 (35) 35.0
 
March 15, 2019, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 8.4 μg/m3 (35) 35.0
 
March 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 7.6 μg/m3 (32) 35.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 7.2 μg/m3 (30) 34.0
 
March 15, 2019, 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 (28) 28.0
 
March 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 7.3 μg/m3 (30) 34.0
 
March 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 7.3 μg/m3 (30) 36.0
 
March 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.8 μg/m3 (28) 37.0
 
March 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 6.2 μg/m3 (26) 38.0
 
March 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 6.2 μg/m3 (26) 38.0
 
March 15, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 6.5 μg/m3 (27) 39.0
 
March 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.4 μg/m3 (27) 37.0
 
March 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 6.5 μg/m3 (27) 39.0
 
March 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 6.6 μg/m3 (28) 41.0
 
March 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.0 μg/m3 (29) 42.0
 
March 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.4 μg/m3 (31) 42.0
 
March 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 9.2 μg/m3 (38) 39.0
 
March 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 10.1 μg/m3 (42) 42.0
 
March 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 8.8 μg/m3 (37) 37.0
 
March 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 14, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 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 7.7 μg/m3 (32) 32.0
 
March 14, 2019, 10 a.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
 
March 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 6.5 μg/m3 (27) 28.0
 
March 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.5 μg/m3 (27) 28.0
 
March 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 7.1 μg/m3 (30) 32.0
 
March 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.5 μg/m3 (27) 27.0
 
March 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.5 μg/m3 (27) 36.0
 
March 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 6.9 μg/m3 (29) 34.0
 
March 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.3 μg/m3 (26) 36.0
 
March 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.3 μg/m3 (26) 36.0
 
March 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 6.2 μg/m3 (26) 38.0
 
March 14, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 6.6 μg/m3 (28) 38.0
 
March 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.9 μg/m3 (37) 38.0
 
March 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 9.4 μg/m3 (39) 39.0
 
March 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 7.9 μg/m3 (33) 35.0
 
March 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 11.3 μg/m3 (47) 47.0
 
March 13, 2019, noon N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 14.6 μg/m3 (56) 56.0
 
March 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 14.1 μg/m3 (54) 54.0
 
March 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 12.7 μg/m3 (51) 51.0
 
March 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 13.5 μg/m3 (53) 53.0
 
March 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.2 μg/m3 (53) 53.0
 
March 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 12.6 μg/m3 (51) 51.0
 
March 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 13, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 8.2 μg/m3 (34) 34.0
 
March 13, 2019, midnight N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.1 μg/m3 (30) 30.0
 
March 12, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 7.0 μg/m3 (29) 35.0
 
March 12, 2019, 10 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
 
March 12, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.7 μg/m3 (32) 38.0
 
March 12, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.7 μg/m3 (32) 38.0
 
March 12, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.0 μg/m3 (33) 38.0
 
March 12, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.0 μg/m3 (33) 37.0
 
March 12, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 7.8 μg/m3 (32) 37.0
 
March 12, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.9 μg/m3 (29) 36.0
 
March 12, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.7 μg/m3 (28) 36.0
 
March 12, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 7.1 μg/m3 (30) 35.0
 
March 12, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 12, 2019, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 12, 2019, 11 a.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 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 12, 2019, 9 a.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
 
March 12, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 7.3 μg/m3 (30) 35.0