AQSQID: 210610501

Site Name: Mammoth Cave Np

Location: Edmonson Co, KY

Reporting: True, Located: True

Current AQI: 56.0

Edmonson Co KY, US: 37.1314, -86.1481

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 24, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 14.8 μg/m3 (56) 56.0
 
March 24, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 14.9 μg/m3 (56) 56.0
 
March 24, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 13.9 μg/m3 (54) 54.0
 
March 24, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 13.1 μg/m3 (52) 52.0
 
March 24, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 14.4 μg/m3 (55) 55.0
 
March 24, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 24, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 17.3 μg/m3 (61) 61.0
 
March 24, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 24, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 8.2 μg/m3 (34) 38.0
 
March 24, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 9.9 μg/m3 (41) 41.0
 
March 24, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 24, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 24, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 7.6 μg/m3 (32) 34.0
 
March 24, 2019, 10 a.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 24, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 5.9 μg/m3 (25) 35.0
 
March 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.3 μg/m3 (26) 26.0
 
March 24, 2019, 7 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 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 7.5 μg/m3 (31) 37.0
 
March 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.0 μg/m3 (29) 38.0
 
March 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 4.8 μg/m3 (20) 38.0
 
March 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.9 μg/m3 (20) 38.0
 
March 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.1 μg/m3 (25) 40.0
 
March 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 7.3 μg/m3 (30) 40.0
 
March 24, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 8.1 μg/m3 (34) 42.0
 
March 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
March 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 4.6 μg/m3 (19) 42.0
 
March 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 2.8 μg/m3 (12) 42.0
 
March 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 2.3 μg/m3 (10) 43.0
 
March 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 2.0 μg/m3 (8) 42.0
 
March 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 2.9 μg/m3 (12) 40.0
 
March 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 2.8 μg/m3 (12) 38.0
 
March 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 3.7 μg/m3 (15) 37.0
 
March 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 3.3 μg/m3 (14) 37.0
 
March 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.4 μg/m3 (18) 34.0
 
March 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 6.7 μg/m3 (28) 31.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 7.0 μg/m3 (29) 33.0
 
March 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 6.6 μg/m3 (28) 35.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.7 μg/m3 (24) 37.0
 
March 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.5 μg/m3 (23) 37.0
 
March 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 10.3 μg/m3 (43) 43.0
 
March 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 23, 2019, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 8.2 μg/m3 (34) 43.0
 
March 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 7.4 μg/m3 (31) 43.0
 
March 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 7.5 μg/m3 (31) 43.0
 
March 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 5.3 μg/m3 (22) 42.0
 
March 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 4.3 μg/m3 (18) 39.0
 
March 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 5.3 μg/m3 (22) 38.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.4 μg/m3 (18) 36.0
 
March 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 6.1 μg/m3 (25) 32.0
 
March 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 9.9 μg/m3 (41) 41.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.8 μg/m3 (32) 32.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 12.7 μg/m3 (51) 51.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 12.4 μg/m3 (51) 51.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 8.5 μg/m3 (35) 35.0
 
March 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 14.5 μg/m3 (55) 55.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 11.2 μg/m3 (47) 47.0
 
March 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 11.2 μg/m3 (47) 47.0
 
March 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 9.4 μg/m3 (39) 39.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.8 μg/m3 (37) 37.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 12.1 μg/m3 (50) 50.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 15.6 μg/m3 (58) 58.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 15.5 μg/m3 (57) 57.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 12.4 μg/m3 (51) 51.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 9.7 μg/m3 (40) 44.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A 9.4 μg/m3 (39) 45.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A N/A 8.3 μg/m3 (35) 47.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 7.3 μg/m3 (30) 46.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A N/A 6.7 μg/m3 (28) 47.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A N/A 5.3 μg/m3 (22) 48.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 5.1 μg/m3 (21) 45.0
 
March 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.5 μg/m3 (23) 42.0
 
March 20, 2019, 3 p.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 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 9.8 μg/m3 (41) 41.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 8.6 μg/m3 (36) 38.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.7 μg/m3 (32) 39.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.2 μg/m3 (30) 39.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.2 μg/m3 (30) 30.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 7.6 μg/m3 (32) 35.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 8.3 μg/m3 (35) 36.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 7.8 μg/m3 (32) 35.0
 
March 20, 2019, 4 a.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
 
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 8.2 μg/m3 (34) 40.0
 
March 20, 2019, 2 a.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 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 8.1 μg/m3 (34) 42.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 9.2 μg/m3 (38) 43.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 8.2 μg/m3 (34) 42.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 6.6 μg/m3 (28) 43.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 5.7 μg/m3 (24) 43.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 5.9 μg/m3 (25) 43.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 3.8 μg/m3 (16) 43.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 3.7 μg/m3 (15) 42.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 4.5 μg/m3 (19) 42.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 5.2 μg/m3 (22) 41.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 6.3 μg/m3 (26) 39.0
 
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 8.1 μg/m3 (34) 35.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 10.3 μg/m3 (43) 43.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.9 μg/m3 (45) 45.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 7.3 μg/m3 (30) 37.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.6 μg/m3 (28) 37.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.4 μg/m3 (23) 37.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 7.7 μg/m3 (32) 35.0
 
March 19, 2019, 3 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 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 7.2 μg/m3 (30) 38.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.5 μg/m3 (27) 40.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.6 μg/m3 (32) 41.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 5.9 μg/m3 (25) 41.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 6.3 μg/m3 (26) 41.0
 
March 18, 2019, 9 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 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.6 μg/m3 (15) 40.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 1.2 μg/m3 (5) 40.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.2 μg/m3 (9) 39.0
 
March 18, 2019, 5 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 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 4.2 μg/m3 (18) 37.0
 
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 4.6 μg/m3 (19) 36.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 6.2 μg/m3 (26) 33.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 7.9 μg/m3 (33) 33.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 6.7 μg/m3 (28) 29.0
 
March 18, 2019, 11 a.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
 
March 18, 2019, 10 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, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 6.4 μg/m3 (27) 32.0
 
March 18, 2019, 8 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 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 6.6 μg/m3 (28) 34.0
 
March 18, 2019, 6 a.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 18, 2019, 5 a.m. 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, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 8.2 μg/m3 (34) 35.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 9.0 μg/m3 (38) 39.0