ID: 874

AQSQID: 510590030

Site Name: Franconia

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

Updated: May 21, 2022, 1:32 a.m.

Location: Alexandria (Groveton Heights), VA

Reporting: True, Located: True

Current AQI: 59.0

Alexandria (Groveton Heights) VA, US: 38.771702, -77.108902

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 12, 2022, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A 12.0 μg/m3 (12) 5.9 μg/m3 (25) 33.0
 
May 12, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A 14.0 μg/m3 (13) 6.2 μg/m3 (26) 33.0
 
May 12, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (30) 30.0
 
May 12, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (30) 30.0
 
May 12, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A 23.0 μg/m3 (22) 7.6 μg/m3 (32) 32.0
 
May 12, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A 23.0 μg/m3 (22) 7.6 μg/m3 (32) 32.0
 
May 12, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A 16.0 μg/m3 (15) 7.5 μg/m3 (32) 32.0
 
May 12, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A 16.0 μg/m3 (15) 7.5 μg/m3 (32) 32.0
 
May 12, 2022, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A 18.0 μg/m3 (17) 7.8 μg/m3 (33) 33.0
 
May 12, 2022, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A 18.0 μg/m3 (17) 7.8 μg/m3 (33) 33.0
 
May 12, 2022, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 16.0 μg/m3 (15) 7.7 μg/m3 (33) 33.0
 
May 12, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 15.0 μg/m3 (14) 7.5 μg/m3 (32) 32.0
 
May 12, 2022, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A 10.0 μg/m3 (10) 5.9 μg/m3 (25) 25.0
 
May 12, 2022, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A 10.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
May 12, 2022, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) N/A 11.0 μg/m3 (11) 6.1 μg/m3 (26) 26.0
 
May 12, 2022, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A 14.0 μg/m3 (13) 7.4 μg/m3 (31) 37.0
 
May 12, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A 13.0 μg/m3 (13) 7.7 μg/m3 (33) 40.0
 
May 11, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 46.0 ppb (43) N/A 17.0 μg/m3 (16) 8.2 μg/m3 (35) 43.0
 
May 11, 2022, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) N/A 17.0 μg/m3 (16) 8.8 μg/m3 (37) 45.0
 
May 11, 2022, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 51.0 ppb (48) N/A 23.0 μg/m3 (22) 10.0 μg/m3 (42) 48.0
 
May 11, 2022, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 52.0 ppb (49) N/A 18.0 μg/m3 (17) 10.6 μg/m3 (45) 49.0
 
May 11, 2022, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 53.0 ppb (50) N/A 17.0 μg/m3 (16) 10.3 μg/m3 (43) 50.0
 
May 11, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 52.0 ppb (49) N/A 16.0 μg/m3 (15) 9.4 μg/m3 (40) 49.0
 
May 11, 2022, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 50.0 ppb (47) N/A 17.0 μg/m3 (16) 9.1 μg/m3 (38) 47.0
 
May 11, 2022, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A 16.0 μg/m3 (15) 9.6 μg/m3 (40) 44.0
 
May 11, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) N/A 17.0 μg/m3 (16) 10.6 μg/m3 (45) 45.0
 
May 11, 2022, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 45.0 ppb (42) N/A 20.0 μg/m3 (19) 12.2 μg/m3 (52) 52.0
 
May 11, 2022, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 45.0 ppb (42) N/A 20.0 μg/m3 (19) 12.2 μg/m3 (52) 52.0
 
May 11, 2022, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) N/A 19.0 μg/m3 (18) 12.4 μg/m3 (52) 52.0
 
May 11, 2022, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) N/A 19.0 μg/m3 (18) 12.4 μg/m3 (52) 52.0
 
May 11, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) N/A 14.0 μg/m3 (13) 5.6 μg/m3 (24) 34.0
 
May 11, 2022, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 13.0 μg/m3 (13) 5.9 μg/m3 (25) 30.0
 
May 11, 2022, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 14.0 μg/m3 (13) 6.1 μg/m3 (26) 30.0
 
May 11, 2022, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) N/A 13.0 μg/m3 (13) 6.0 μg/m3 (25) 30.0
 
May 11, 2022, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A 12.0 μg/m3 (12) 5.9 μg/m3 (25) 41.0
 
May 11, 2022, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (44) N/A 12.0 μg/m3 (12) 5.7 μg/m3 (24) 44.0
 
May 11, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) N/A 11.0 μg/m3 (11) 5.2 μg/m3 (22) 43.0
 
May 11, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 58.0 ppb (61) N/A 14.0 μg/m3 (13) 5.0 μg/m3 (21) 61.0
 
May 10, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 60.0 ppb (68) N/A 13.0 μg/m3 (13) 4.8 μg/m3 (20) 68.0
 
May 10, 2022, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 61.0 ppb (71) N/A 14.0 μg/m3 (13) 4.5 μg/m3 (19) 71.0
 
May 10, 2022, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 59.0 ppb (65) N/A 13.0 μg/m3 (13) 4.5 μg/m3 (19) 65.0
 
May 10, 2022, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 58.0 ppb (61) N/A 15.0 μg/m3 (14) 4.6 μg/m3 (20) 61.0
 
May 10, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 57.0 ppb (58) N/A 13.0 μg/m3 (13) 4.4 μg/m3 (19) 58.0
 
May 10, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 55.0 ppb (51) N/A 16.0 μg/m3 (15) 4.6 μg/m3 (20) 51.0
 
May 10, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 53.0 ppb (50) N/A 15.0 μg/m3 (14) 4.6 μg/m3 (20) 50.0
 
May 10, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 14.0 μg/m3 (13) 4.5 μg/m3 (19) 48.0
 
May 10, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (13) 4.8 μg/m3 (20) 20.0
 
May 10, 2022, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (46) N/A 11.0 μg/m3 (11) 4.7 μg/m3 (20) 46.0
 
May 10, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) N/A 12.0 μg/m3 (12) 4.9 μg/m3 (21) 45.0
 
May 10, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) N/A 12.0 μg/m3 (12) 4.9 μg/m3 (21) 45.0
 
May 10, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A 10.0 μg/m3 (10) 5.1 μg/m3 (22) 41.0
 
May 10, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A 10.0 μg/m3 (10) 5.1 μg/m3 (22) 41.0
 
May 10, 2022, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) N/A 11.0 μg/m3 (11) 5.2 μg/m3 (22) 39.0
 
May 10, 2022, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) N/A 11.0 μg/m3 (11) 5.3 μg/m3 (23) 39.0
 
May 10, 2022, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A 12.0 μg/m3 (12) 5.5 μg/m3 (23) 37.0
 
May 10, 2022, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A 13.0 μg/m3 (13) 6.0 μg/m3 (25) 32.0
 
May 10, 2022, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (32) N/A 12.0 μg/m3 (12) 6.3 μg/m3 (27) 32.0
 
May 10, 2022, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 13.0 μg/m3 (13) 6.7 μg/m3 (28) 28.0
 
May 10, 2022, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 13.0 μg/m3 (13) 6.7 μg/m3 (28) 28.0
 
May 10, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A 11.0 μg/m3 (11) 6.0 μg/m3 (25) 33.0
 
May 10, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A 11.0 μg/m3 (11) 6.0 μg/m3 (25) 33.0
 
May 10, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A 12.0 μg/m3 (12) 6.9 μg/m3 (29) 38.0
 
May 10, 2022, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A 12.0 μg/m3 (12) 6.9 μg/m3 (29) 38.0
 
May 10, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 50.0 ppb (47) N/A 11.0 μg/m3 (11) 5.3 μg/m3 (23) 47.0
 
May 10, 2022, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 50.0 ppb (47) N/A 11.0 μg/m3 (11) 5.3 μg/m3 (23) 47.0
 
May 9, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 54.0 ppb (50) N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 50.0
 
May 9, 2022, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 54.0 ppb (50) N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 50.0
 
May 9, 2022, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 58.0 ppb (61) N/A 12.0 μg/m3 (12) 5.0 μg/m3 (21) 61.0
 
May 9, 2022, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 60.0 ppb (68) N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 68.0
 
May 9, 2022, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 60.0 ppb (68) N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 68.0
 
May 9, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 55.0 ppb (51) N/A 9.0 μg/m3 (9) 4.5 μg/m3 (19) 51.0
 
May 9, 2022, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A 10.0 μg/m3 (10) 4.1 μg/m3 (18) 36.0
 
May 9, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (32) N/A 9.0 μg/m3 (9) 4.0 μg/m3 (17) 32.0
 
May 9, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) N/A 9.0 μg/m3 (9) 4.5 μg/m3 (19) 25.0
 
May 9, 2022, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) N/A 10.0 μg/m3 (10) 5.2 μg/m3 (22) 22.0
 
May 9, 2022, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A 11.0 μg/m3 (11) 5.4 μg/m3 (23) 23.0
 
May 9, 2022, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A 10.0 μg/m3 (10) 5.5 μg/m3 (23) 23.0
 
May 9, 2022, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (13) N/A 10.0 μg/m3 (10) 6.1 μg/m3 (26) 26.0
 
May 9, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) N/A 11.0 μg/m3 (11) 6.1 μg/m3 (26) 26.0
 
May 9, 2022, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) N/A 10.0 μg/m3 (10) 5.4 μg/m3 (23) 31.0
 
May 9, 2022, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (40) N/A 10.0 μg/m3 (10) 5.3 μg/m3 (23) 40.0
 
May 8, 2022, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) N/A 10.0 μg/m3 (10) 5.2 μg/m3 (22) 43.0
 
May 8, 2022, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) N/A 11.0 μg/m3 (11) 5.5 μg/m3 (23) 43.0
 
May 8, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
May 8, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
May 8, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (10) 4.8 μg/m3 (20) 20.0
 
May 8, 2022, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 10.0 μg/m3 (10) 4.6 μg/m3 (20) 20.0
 
May 8, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 8.0 μg/m3 (8) 4.5 μg/m3 (19) 19.0
 
May 8, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 8.0 μg/m3 (8) 4.5 μg/m3 (19) 19.0
 
May 8, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (7) 4.2 μg/m3 (18) 18.0
 
May 8, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (7) 4.2 μg/m3 (18) 18.0
 
May 8, 2022, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
May 8, 2022, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (7) 4.4 μg/m3 (19) 19.0
 
May 8, 2022, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (7) 4.4 μg/m3 (19) 19.0
 
May 8, 2022, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (7) 4.2 μg/m3 (18) 18.0
 
May 8, 2022, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 7.0 μg/m3 (7) 4.2 μg/m3 (18) 18.0
 
May 8, 2022, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 4.0 μg/m3 (4) 3.2 μg/m3 (14) 14.0
 
May 8, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 4.0 μg/m3 (4) 3.2 μg/m3 (14) 14.0
 
May 8, 2022, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (3) 2.7 μg/m3 (12) 12.0
 
May 8, 2022, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 10.0
 
May 7, 2022, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 1.3 μg/m3 (6) 6.0
 
May 7, 2022, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 1.0 μg/m3 (5) 5.0
 
May 7, 2022, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
May 7, 2022, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (3) 1.2 μg/m3 (5) 5.0
 
May 7, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (3) 1.6 μg/m3 (7) 7.0
 
May 7, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 3.0 μg/m3 (3) 1.6 μg/m3 (7) 7.0
 
May 7, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
May 7, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
May 7, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 0.7 μg/m3 (3) 3.0
 
May 7, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 0.7 μg/m3 (3) 3.0
 
May 7, 2022, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 0.6 μg/m3 (3) 3.0
 
May 7, 2022, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 0.5 μg/m3 (3) 3.0
 
May 7, 2022, noon N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 0.6 μg/m3 (3) 3.0
 
May 7, 2022, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 1.0 μg/m3 (1) 0.5 μg/m3 (3) 3.0
 
May 7, 2022, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 0.5 μg/m3 (3) 3.0
 
May 7, 2022, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 0.7 μg/m3 (3) 3.0
 
May 7, 2022, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (2) 0.7 μg/m3 (3) 3.0
 
May 7, 2022, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 3.0 μg/m3 (3) 1.3 μg/m3 (6) 20.0
 
May 7, 2022, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 1.8 μg/m3 (8) 8.0
 
May 7, 2022, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 5.0 μg/m3 (5) 1.8 μg/m3 (8) 20.0
 
May 7, 2022, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 20.0
 
May 7, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 4.0 μg/m3 (4) 1.7 μg/m3 (8) 20.0
 
May 6, 2022, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) N/A 11.0 μg/m3 (11) 5.4 μg/m3 (23) 23.0
 
May 6, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A 11.0 μg/m3 (11) 6.2 μg/m3 (26) 26.0
 
May 6, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A 11.0 μg/m3 (11) 6.2 μg/m3 (26) 26.0
 
May 6, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 10.0 μg/m3 (10) 5.5 μg/m3 (23) 23.0
 
May 6, 2022, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 10.0 μg/m3 (10) 5.5 μg/m3 (23) 23.0
 
May 6, 2022, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A 9.0 μg/m3 (9) 4.8 μg/m3 (20) 20.0
 
May 6, 2022, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (13) N/A N/A 7.9 μg/m3 (33) 33.0
 
May 6, 2022, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (13) N/A N/A 7.4 μg/m3 (31) 31.0
 
May 6, 2022, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (13) N/A N/A 7.4 μg/m3 (31) 31.0
 
May 6, 2022, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 6.8 μg/m3 (29) 29.0
 
May 6, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 6, 2022, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 6, 2022, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 6.5 μg/m3 (28) 28.0
 
May 6, 2022, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 6, 2022, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 5, 2022, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
May 5, 2022, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
May 5, 2022, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.1 μg/m3 (22) 33.0
 
May 5, 2022, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 5.6 μg/m3 (24) 34.0
 
May 5, 2022, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
May 5, 2022, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
May 5, 2022, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.6 μg/m3 (24) 29.0
 
May 5, 2022, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
May 5, 2022, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 5.1 μg/m3 (22) 24.0
 
May 5, 2022, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 4.2 μg/m3 (18) 24.0
 
May 5, 2022, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 3.8 μg/m3 (16) 24.0
 
May 5, 2022, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 7.9 μg/m3 (33) 33.0
 
May 5, 2022, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 7.9 μg/m3 (33) 33.0
 
May 5, 2022, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 6.9 μg/m3 (29) 33.0
 
May 5, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.8 μg/m3 (25) 34.0
 
May 5, 2022, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 5.8 μg/m3 (25) 34.0
 
May 5, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.2 μg/m3 (22) 37.0
 
May 5, 2022, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.2 μg/m3 (22) 37.0
 
May 5, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.7 μg/m3 (24) 38.0
 
May 5, 2022, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.7 μg/m3 (24) 38.0
 
May 5, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 9.4 μg/m3 (40) 40.0
 
May 5, 2022, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 9.4 μg/m3 (40) 40.0
 
May 4, 2022, 11 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 13.3 μg/m3 (54) 54.0
 
May 4, 2022, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 12.7 μg/m3 (53) 53.0
 
May 4, 2022, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 7.7 μg/m3 (33) 33.0
 
May 4, 2022, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 6.1 μg/m3 (26) 26.0
 
May 4, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 5.0 μg/m3 (21) 21.0
 
May 4, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 5.0 μg/m3 (21) 21.0
 
May 4, 2022, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 4.2 μg/m3 (18) 18.0
 
May 4, 2022, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 4.2 μg/m3 (18) 18.0
 
May 4, 2022, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 3.4 μg/m3 (15) 17.0