AQSQID: 511130003

Site Name: Shenandoah Np

Location: Madison Co, VA

Reporting: True, Located: True

Current AQI: 40.0

Madison Co VA, US: 38.5231, -78.4347

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.6 μg/m3 (19) 40.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 4.6 μg/m3 (19) 39.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.1 μg/m3 (21) 39.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 4.6 μg/m3 (19) 39.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 3.5 μg/m3 (15) 39.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 0.8 μg/m3 (3) 40.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 1.1 μg/m3 (5) 40.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.8 μg/m3 (24) 39.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 4.3 μg/m3 (18) 38.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.8 μg/m3 (20) 36.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.7 μg/m3 (20) 20.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.6 μg/m3 (19) 35.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.5 μg/m3 (23) 35.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 5.4 μg/m3 (23) 34.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 5.3 μg/m3 (22) 34.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 6.1 μg/m3 (25) 34.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.4 μg/m3 (23) 35.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.5 μg/m3 (23) 35.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 4.2 μg/m3 (18) 35.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 4.8 μg/m3 (20) 35.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 4.6 μg/m3 (19) 35.0
 
March 19, 2019, 3 a.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 19, 2019, 2 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
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 5.8 μg/m3 (24) 35.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 6.8 μg/m3 (28) 35.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.4 μg/m3 (23) 36.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 4.5 μg/m3 (19) 37.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.3 μg/m3 (18) 36.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.4 μg/m3 (14) 36.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.4 μg/m3 (27) 36.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.4 μg/m3 (23) 36.0
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.2 μg/m3 (18) 36.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.9 μg/m3 (20) 36.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.2 μg/m3 (18) 36.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 5.6 μg/m3 (23) 35.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.3 μg/m3 (22) 36.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.8 μg/m3 (20) 36.0
 
March 18, 2019, 10 a.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 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.8 μg/m3 (20) 33.0
 
March 18, 2019, 7 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 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.2 μg/m3 (18) 33.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.0 μg/m3 (17) 33.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.3 μg/m3 (14) 36.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 2.9 μg/m3 (12) 37.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.2 μg/m3 (13) 36.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 4.1 μg/m3 (17) 37.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.3 μg/m3 (14) 38.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.2 μg/m3 (13) 38.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 2.7 μg/m3 (11) 38.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 2.6 μg/m3 (11) 38.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 2.1 μg/m3 (9) 37.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.5 μg/m3 (6) 36.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.7 μg/m3 (7) 36.0
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 2.9 μg/m3 (12) 35.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.1 μg/m3 (13) 35.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.2 μg/m3 (18) 34.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.8 μg/m3 (16) 34.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.2 μg/m3 (13) 34.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.0 μg/m3 (17) 33.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.2 μg/m3 (18) 34.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.5 μg/m3 (19) 33.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.0 μg/m3 (12) 34.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.6 μg/m3 (15) 35.0
 
March 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.4 μg/m3 (14) 35.0
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 35.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.8 μg/m3 (16) 36.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.3 μg/m3 (18) 36.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 4.7 μg/m3 (20) 37.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.1 μg/m3 (21) 38.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.9 μg/m3 (16) 38.0
 
March 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 2.9 μg/m3 (12) 38.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.2 μg/m3 (13) 38.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
March 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 1.7 μg/m3 (7) 39.0
 
March 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 38.0
 
March 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.5 μg/m3 (15) 36.0
 
March 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.2 μg/m3 (13) 35.0
 
March 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.1 μg/m3 (17) 34.0
 
March 16, 2019, noon 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 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 2.2 μg/m3 (9) 33.0
 
March 16, 2019, 10 a.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 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 2.6 μg/m3 (11) 32.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 2.2 μg/m3 (9) 30.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 1.3 μg/m3 (5) 30.0
 
March 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 1.1 μg/m3 (5) 31.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 3.0 μg/m3 (12) 31.0
 
March 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.0 μg/m3 (8) 32.0
 
March 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 2.8 μg/m3 (12) 34.0
 
March 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 3.7 μg/m3 (15) 36.0
 
March 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
March 16, 2019, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
March 15, 2019, 11 p.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
 
March 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.9 μg/m3 (16) 33.0
 
March 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 4.2 μg/m3 (18) 31.0
 
March 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 5.4 μg/m3 (23) 30.0
 
March 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.6 μg/m3 (19) 30.0
 
March 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 5.7 μg/m3 (24) 32.0
 
March 15, 2019, 5 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 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 5.3 μg/m3 (22) 32.0
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 5.7 μg/m3 (24) 32.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 6.7 μg/m3 (28) 32.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 6.6 μg/m3 (28) 32.0
 
March 15, 2019, noon 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, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 8.4 μg/m3 (35) 35.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 8.0 μg/m3 (33) 35.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 7.9 μg/m3 (33) 36.0
 
March 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 7.4 μg/m3 (31) 36.0
 
March 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.1 μg/m3 (25) 37.0
 
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 6.0 μg/m3 (25) 37.0
 
March 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.3 μg/m3 (22) 38.0
 
March 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.6 μg/m3 (23) 39.0
 
March 15, 2019, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 5.9 μg/m3 (25) 40.0
 
March 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 5.9 μg/m3 (25) 40.0
 
March 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.4 μg/m3 (27) 40.0
 
March 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.3 μg/m3 (26) 40.0
 
March 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 6.5 μg/m3 (27) 41.0
 
March 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.2 μg/m3 (30) 41.0
 
March 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.9 μg/m3 (33) 42.0
 
March 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 8.0 μg/m3 (33) 42.0
 
March 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 9.2 μg/m3 (38) 42.0
 
March 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.4 μg/m3 (31) 41.0
 
March 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.2 μg/m3 (30) 42.0
 
March 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 8.7 μg/m3 (36) 42.0
 
March 14, 2019, noon N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 12.1 μg/m3 (50) 50.0
 
March 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 10.6 μg/m3 (44) 44.0
 
March 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 7.9 μg/m3 (33) 44.0
 
March 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 4.9 μg/m3 (20) 43.0
 
March 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.9 μg/m3 (25) 42.0
 
March 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 6.3 μg/m3 (26) 42.0
 
March 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 6.4 μg/m3 (27) 42.0
 
March 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.7 μg/m3 (24) 42.0
 
March 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.9 μg/m3 (25) 42.0
 
March 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.2 μg/m3 (22) 42.0
 
March 14, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.6 μg/m3 (23) 42.0
 
March 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.3 μg/m3 (22) 22.0
 
March 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
March 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.4 μg/m3 (23) 42.0
 
March 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0
 
March 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 5.7 μg/m3 (24) 40.0
 
March 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.3 μg/m3 (18) 40.0
 
March 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 4.2 μg/m3 (18) 42.0
 
March 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
March 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.6 μg/m3 (19) 40.0
 
March 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.2 μg/m3 (18) 38.0
 
March 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.3 μg/m3 (18) 40.0
 
March 13, 2019, noon N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.6 μg/m3 (19) 40.0
 
March 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.5 μg/m3 (23) 39.0
 
March 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.8 μg/m3 (24) 39.0
 
March 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.5 μg/m3 (23) 39.0
 
March 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.7 μg/m3 (15) 38.0
 
March 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
March 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.6 μg/m3 (15) 38.0
 
March 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 2.5 μg/m3 (10) 40.0