ID: 880

AQSQID: 511130003

Site Name: Shenandoah Np

Added: April 21, 2020, 6:24 p.m.

Updated: April 10, 2021, 5:42 p.m.

Location: Luray (Big Meadows Air Quality Rd), VA

Reporting: True, Located: True

Current AQI: 38.0

Luray (Big Meadows Air Quality Rd) VA, US: 38.5231, -78.4347

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 10, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.2 μg/m3 (18) 38.0
 
April 10, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.4 μg/m3 (15) 36.0
 
April 10, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
April 10, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 4.1 μg/m3 (18) 28.0
 
April 10, 2021, noon N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 5.0 μg/m3 (21) 44.0
 
April 10, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.4 μg/m3 (27) 46.0
 
April 10, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 3.2 μg/m3 (14) 45.0
 
April 10, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.1 μg/m3 (13) 43.0
 
April 10, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.1 μg/m3 (13) 43.0
 
April 10, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.4 μg/m3 (10) 40.0
 
April 10, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 0.2 μg/m3 (1) 37.0
 
April 10, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.5 μg/m3 (7) 38.0
 
April 10, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.8 μg/m3 (16) 38.0
 
April 10, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 4.7 μg/m3 (20) 38.0
 
April 10, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.0 μg/m3 (9) 35.0
 
April 10, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.7 μg/m3 (16) 34.0
 
April 10, 2021, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 7.9 μg/m3 (33) 38.0
 
April 9, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 9.0 μg/m3 (38) 42.0
 
April 9, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 6.5 μg/m3 (28) 38.0
 
April 9, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.7 μg/m3 (24) 36.0
 
April 9, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 7.6 μg/m3 (32) 38.0
 
April 9, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 6.7 μg/m3 (28) 38.0
 
April 9, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 8.6 μg/m3 (36) 40.0
 
April 9, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 8.2 μg/m3 (35) 41.0
 
April 9, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.2 μg/m3 (22) 36.0
 
April 9, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 3.9 μg/m3 (17) 37.0
 
April 9, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 4.9 μg/m3 (21) 35.0
 
April 9, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 2.5 μg/m3 (11) 35.0
 
April 9, 2021, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.2 μg/m3 (14) 35.0
 
April 9, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.9 μg/m3 (13) 34.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 2.1 μg/m3 (9) 34.0
 
April 9, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 1.6 μg/m3 (7) 34.0
 
April 9, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 0.5 μg/m3 (3) 34.0
 
April 9, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 1.5 μg/m3 (7) 36.0
 
April 9, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A -0.2 μg/m3 (0) 36.0
 
April 9, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 9, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.6 μg/m3 (11) 36.0
 
April 9, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.2 μg/m3 (10) 36.0
 
April 9, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 2.5 μg/m3 (11) 36.0
 
April 9, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.4 μg/m3 (10) 37.0
 
April 9, 2021, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.4 μg/m3 (19) 39.0
 
April 8, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 4.0 μg/m3 (17) 50.0
 
April 8, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 4.8 μg/m3 (20) 51.0
 
April 8, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 7.5 μg/m3 (32) 58.0
 
April 8, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 6.2 μg/m3 (26) 55.0
 
April 8, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 5.4 μg/m3 (23) 55.0
 
April 8, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 5.4 μg/m3 (23) 55.0
 
April 8, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 6.4 μg/m3 (27) 58.0
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 6.1 μg/m3 (26) 68.0
 
April 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 7.6 μg/m3 (32) 68.0
 
April 8, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 7.7 μg/m3 (33) 61.0
 
April 8, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 5.5 μg/m3 (23) 61.0
 
April 8, 2021, noon N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 6.1 μg/m3 (26) 58.0
 
April 8, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 10.1 μg/m3 (43) 61.0
 
April 8, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 11.7 μg/m3 (49) 55.0
 
April 8, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 13.3 μg/m3 (54) 54.0
 
April 8, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 12.7 μg/m3 (53) 53.0
 
April 8, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 12.0 μg/m3 (50) 68.0
 
April 8, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 12.9 μg/m3 (53) 68.0
 
April 8, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 12.3 μg/m3 (52) 58.0
 
April 8, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 12.2 μg/m3 (52) 61.0
 
April 8, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 10.9 μg/m3 (46) 65.0
 
April 8, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 11.6 μg/m3 (49) 68.0
 
April 8, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 11.8 μg/m3 (50) 68.0
 
April 8, 2021, midnight N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 14.0 μg/m3 (55) 65.0
 
April 7, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 16.5 μg/m3 (61) 65.0
 
April 7, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 17.5 μg/m3 (63) 71.0
 
April 7, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 22.5 μg/m3 (73) 81.0
 
April 7, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 17.2 μg/m3 (62) 74.0
 
April 7, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 10.6 μg/m3 (45) 65.0
 
April 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 9.5 μg/m3 (40) 61.0
 
April 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 9.5 μg/m3 (40) 61.0
 
April 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 10.4 μg/m3 (44) 61.0
 
April 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 10.6 μg/m3 (45) 61.0
 
April 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 11.7 μg/m3 (49) 58.0
 
April 7, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 10.9 μg/m3 (46) 58.0
 
April 7, 2021, noon N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 11.0 μg/m3 (46) 58.0
 
April 7, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 11.3 μg/m3 (48) 61.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 11.2 μg/m3 (47) 65.0
 
April 7, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 11.7 μg/m3 (49) 68.0
 
April 7, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 11.6 μg/m3 (49) 71.0
 
April 7, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 12.9 μg/m3 (53) 74.0
 
April 7, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 11.5 μg/m3 (48) 78.0
 
April 7, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 8.7 μg/m3 (37) 78.0
 
April 7, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 19.7 μg/m3 (67) 81.0
 
April 7, 2021, midnight N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 12.9 μg/m3 (53) 78.0
 
April 6, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 11.7 μg/m3 (49) 74.0
 
April 6, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 12.7 μg/m3 (53) 74.0
 
April 6, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 10.0 μg/m3 (42) 74.0
 
April 6, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 9.6 μg/m3 (40) 71.0
 
April 6, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 9.8 μg/m3 (41) 74.0
 
April 6, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 13.7 μg/m3 (55) 81.0
 
April 6, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.2 μg/m3 (56) 56.0
 
April 6, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 12.5 μg/m3 (52) 81.0
 
April 6, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 12.3 μg/m3 (52) 71.0
 
April 6, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 14.4 μg/m3 (56) 68.0
 
April 6, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 12.9 μg/m3 (53) 65.0
 
April 6, 2021, noon N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 11.3 μg/m3 (48) 65.0
 
April 6, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 12.6 μg/m3 (53) 65.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 10.0 μg/m3 (42) 58.0
 
April 6, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 7.5 μg/m3 (32) 51.0
 
April 6, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 6.9 μg/m3 (29) 51.0
 
April 6, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 9.6 μg/m3 (40) 49.0
 
April 6, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 9.1 μg/m3 (38) 55.0
 
April 6, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 6.3 μg/m3 (27) 55.0
 
April 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 7.4 μg/m3 (31) 55.0
 
April 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 9.1 μg/m3 (38) 50.0
 
April 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 19.3 μg/m3 (67) 67.0
 
April 6, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 31.5 μg/m3 (92) 92.0
 
April 6, 2021, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 47.4 μg/m3 (131) 131.0
 
April 5, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 27.2 μg/m3 (83) 83.0
 
April 5, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 67.0 ppb (91) N/A N/A N/A 91.0
 
April 5, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 18.3 μg/m3 (65) 65.0
 
April 5, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 5.5 μg/m3 (23) 50.0
 
April 5, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 4.2 μg/m3 (18) 50.0
 
April 5, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 5.2 μg/m3 (22) 50.0
 
April 5, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 6.3 μg/m3 (27) 50.0
 
April 5, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 5.5 μg/m3 (23) 50.0
 
April 5, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 4.7 μg/m3 (20) 49.0
 
April 5, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 4.1 μg/m3 (18) 49.0
 
April 5, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 7.8 μg/m3 (33) 50.0
 
April 5, 2021, noon N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 8.6 μg/m3 (36) 50.0
 
April 5, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 8.2 μg/m3 (35) 50.0
 
April 5, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 7.7 μg/m3 (33) 48.0
 
April 5, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 7.6 μg/m3 (32) 47.0
 
April 5, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 7.2 μg/m3 (31) 48.0
 
April 5, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 6.4 μg/m3 (27) 49.0
 
April 5, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 7.8 μg/m3 (33) 50.0
 
April 5, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 7.9 μg/m3 (33) 55.0
 
April 5, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 8.6 μg/m3 (36) 55.0
 
April 5, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 8.5 μg/m3 (36) 55.0
 
April 5, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 8.1 μg/m3 (34) 55.0
 
April 5, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 8.4 μg/m3 (36) 51.0
 
April 5, 2021, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 8.1 μg/m3 (34) 55.0
 
April 4, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 7.5 μg/m3 (32) 55.0
 
April 4, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 7.8 μg/m3 (33) 55.0
 
April 4, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 6.2 μg/m3 (26) 51.0
 
April 4, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 6.4 μg/m3 (27) 51.0
 
April 4, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 7.2 μg/m3 (31) 51.0
 
April 4, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 8.5 μg/m3 (36) 55.0
 
April 4, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 9.2 μg/m3 (39) 55.0
 
April 4, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 10.6 μg/m3 (45) 50.0
 
April 4, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 8.5 μg/m3 (36) 49.0
 
April 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 6.4 μg/m3 (27) 47.0
 
April 4, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.7 μg/m3 (24) 46.0
 
April 4, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 5.8 μg/m3 (25) 45.0
 
April 4, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.7 μg/m3 (28) 45.0
 
April 4, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.3 μg/m3 (18) 43.0
 
April 4, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.0 μg/m3 (17) 43.0
 
April 4, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 3.9 μg/m3 (17) 44.0
 
April 4, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 3.7 μg/m3 (16) 45.0
 
April 4, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 4.1 μg/m3 (18) 46.0
 
April 4, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 4.4 μg/m3 (19) 46.0
 
April 4, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 4.7 μg/m3 (20) 45.0
 
April 4, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.9 μg/m3 (21) 43.0
 
April 4, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.9 μg/m3 (17) 43.0
 
April 4, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.2 μg/m3 (14) 43.0
 
April 4, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 5.5 μg/m3 (23) 42.0
 
April 3, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.7 μg/m3 (12) 42.0
 
April 3, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.8 μg/m3 (12) 43.0
 
April 3, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 3.0 μg/m3 (13) 44.0
 
April 3, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 2.5 μg/m3 (11) 44.0
 
April 3, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 2.9 μg/m3 (13) 43.0
 
April 3, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.2 μg/m3 (10) 42.0
 
April 3, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.3 μg/m3 (10) 41.0
 
April 3, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.4 μg/m3 (10) 40.0
 
April 3, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 2.4 μg/m3 (10) 40.0
 
April 3, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 3.4 μg/m3 (15) 41.0