ID: 638

AQSQID: 371590021

Site Name: Rockwell

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

Updated: April 21, 2021, 7:45 p.m.

Location: Rockwell (W St), NC

Reporting: True, Located: True

Current AQI: 53.0

Rockwell (W St) NC, US: 35.551868, -80.395039

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 21, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 53.0 ppb (50) N/A N/A -4.0 μg/m3 (0) 50.0
 
April 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 14.0 μg/m3 (55) 55.0
 
April 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 12.0 μg/m3 (50) 50.0
 
April 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 21, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 28.0 ppb (26) N/A N/A 14.0 μg/m3 (55) 55.0
 
April 21, 2021, 10 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 21, 2021, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 21, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
April 21, 2021, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 8.0 μg/m3 (34) 36.0
 
April 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 21, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 14.0 μg/m3 (55) 55.0
 
April 21, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 21, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) N/A N/A 8.0 μg/m3 (34) 43.0
 
April 21, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 6.0 μg/m3 (25) 45.0
 
April 21, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 4.0 μg/m3 (17) 46.0
 
April 21, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) N/A N/A 6.0 μg/m3 (25) 47.0
 
April 20, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 52.0 ppb (49) N/A N/A 9.0 μg/m3 (38) 49.0
 
April 20, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 55.0 ppb (51) N/A N/A 11.0 μg/m3 (46) 51.0
 
April 20, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 56.0 ppb (55) N/A N/A 10.0 μg/m3 (42) 55.0
 
April 20, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 56.0 ppb (55) N/A N/A 2.0 μg/m3 (9) 55.0
 
April 20, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 55.0 ppb (51) N/A N/A 8.0 μg/m3 (34) 51.0
 
April 20, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 54.0 ppb (50) N/A N/A 12.0 μg/m3 (50) 50.0
 
April 20, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 53.0 ppb (50) N/A N/A 11.0 μg/m3 (46) 50.0
 
April 20, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 9.0 μg/m3 (38) 47.0
 
April 20, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 10.0 μg/m3 (42) 45.0
 
April 20, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 15.0 μg/m3 (58) 58.0
 
April 20, 2021, 1 p.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 33.0 ppb (31) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, noon N/A N/A N/A 9.0 ppb (9) N/A N/A 11.0 ppb (11) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 11 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 2.0 ppb (2) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 10 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 9 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 2.0 ppb (2) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, 8 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 4.0 ppb (4) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 10.0 ppb (10) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 20, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 12.0 ppb (12) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 20, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 16.0 ppb (15) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, 2 a.m. N/A N/A N/A 11.0 ppb (11) N/A N/A 18.0 ppb (17) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 20, 2021, 1 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 26.0 ppb (25) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, midnight N/A N/A N/A 6.0 ppb (6) N/A N/A 37.0 ppb (35) N/A N/A 8.0 μg/m3 (34) 35.0
 
April 19, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 7.0 μg/m3 (30) 44.0
 
April 19, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 6.0 μg/m3 (25) 47.0
 
April 19, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 4.0 μg/m3 (17) 47.0
 
April 19, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 51.0 ppb (48) N/A N/A 3.0 μg/m3 (13) 48.0
 
April 19, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 19, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 19, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 19, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 2.0 μg/m3 (9) 44.0
 
April 19, 2021, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 6.0 μg/m3 (25) 43.0
 
April 19, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 3.0 μg/m3 (13) 42.0
 
April 19, 2021, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 8.0 μg/m3 (34) 38.0
 
April 19, 2021, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 1.0 μg/m3 (5) 36.0
 
April 19, 2021, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
April 19, 2021, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 1.0 μg/m3 (5) 34.0
 
April 19, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 7 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 17.0 ppb (16) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 14.0 μg/m3 (55) 55.0
 
April 19, 2021, 5 a.m. N/A N/A N/A 17.0 ppb (17) N/A N/A 8.0 ppb (8) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 17.0 ppb (16) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 3 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 2 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 25.0 ppb (24) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 1 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
April 19, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) N/A N/A 7.0 μg/m3 (30) 36.0
 
April 18, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
April 18, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 52.0 ppb (49) N/A N/A -1.0 μg/m3 (0) 49.0
 
April 18, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 51.0 ppb (48) N/A N/A 9.0 μg/m3 (38) 48.0
 
April 18, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
April 18, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 9.0 μg/m3 (38) 46.0
 
April 18, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 5.0 μg/m3 (21) 46.0
 
April 18, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 6.0 μg/m3 (25) 45.0
 
April 18, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 8.0 μg/m3 (34) 44.0
 
April 18, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
April 18, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
April 18, 2021, 1 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) N/A N/A 3.0 μg/m3 (13) 31.0
 
April 18, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 11 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 3.0 μg/m3 (13) 24.0
 
April 18, 2021, 10 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 26.0 ppb (25) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 23.0 ppb (22) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 18, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 18.0 ppb (17) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 18, 2021, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
April 18, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) N/A N/A 8.0 μg/m3 (34) 41.0
 
April 17, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 52.0 ppb (49) N/A N/A 2.0 μg/m3 (9) 49.0
 
April 17, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 54.0 ppb (50) N/A N/A 4.0 μg/m3 (17) 50.0
 
April 17, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 53.0 ppb (50) N/A N/A 11.0 μg/m3 (46) 50.0
 
April 17, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 51.0 ppb (48) N/A N/A 3.0 μg/m3 (13) 48.0
 
April 17, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 2.0 μg/m3 (9) 44.0
 
April 17, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 3.0 μg/m3 (13) 42.0
 
April 17, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
April 17, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 2.0 μg/m3 (9) 42.0
 
April 17, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
April 17, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
April 17, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
April 17, 2021, noon N/A N/A N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) N/A N/A 0.0 μg/m3 (0) 26.0
 
April 17, 2021, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 20.0 ppb (19) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 17, 2021, 10 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 20.0 ppb (19) N/A N/A 3.0 μg/m3 (13) 19.0
 
April 17, 2021, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 23.0 ppb (22) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
April 17, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 17.0 ppb (16) N/A N/A 18.0 μg/m3 (64) 64.0
 
April 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 16.0 μg/m3 (60) 60.0
 
April 17, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 13.0 ppb (13) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 17, 2021, 4 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A 20.0 ppb (19) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 17, 2021, 3 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 18.0 ppb (17) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 2 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 24.0 ppb (23) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 17, 2021, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 28.0 ppb (26) N/A N/A 0.0 μg/m3 (0) 26.0
 
April 17, 2021, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A 37.0 ppb (35) N/A N/A 1.0 μg/m3 (5) 35.0
 
April 16, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 4.0 μg/m3 (17) 43.0
 
April 16, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 3.0 μg/m3 (13) 46.0
 
April 16, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
April 16, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 3.0 μg/m3 (13) 46.0
 
April 16, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 6.0 μg/m3 (25) 46.0
 
April 16, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 3.0 μg/m3 (13) 44.0
 
April 16, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
April 16, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) N/A N/A 7.0 μg/m3 (30) 40.0
 
April 16, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
April 16, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) N/A N/A 2.0 μg/m3 (9) 34.0
 
April 16, 2021, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 6.0 μg/m3 (25) 30.0
 
April 16, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) N/A N/A -3.0 μg/m3 (0) 25.0
 
April 16, 2021, 11 a.m. N/A N/A N/A 12.0 ppb (12) N/A N/A 10.0 ppb (10) N/A N/A 3.0 μg/m3 (13) 13.0
 
April 16, 2021, 10 a.m. N/A N/A N/A 10.0 ppb (10) N/A N/A 14.0 ppb (13) N/A N/A 3.0 μg/m3 (13) 13.0
 
April 16, 2021, 9 a.m. N/A N/A N/A 7.0 ppb (7) N/A N/A 19.0 ppb (18) N/A N/A 3.0 μg/m3 (13) 18.0
 
April 16, 2021, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
April 16, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
April 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 7.0 μg/m3 (30) 31.0
 
April 16, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0
 
April 16, 2021, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 2.0 μg/m3 (9) 33.0
 
April 16, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
April 16, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
April 16, 2021, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 4.0 μg/m3 (17) 39.0
 
April 16, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 8.0 μg/m3 (34) 42.0
 
April 15, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 48.0 ppb (45) N/A N/A 4.0 μg/m3 (17) 45.0
 
April 15, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 4.0 μg/m3 (17) 46.0
 
April 15, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 7.0 μg/m3 (30) 47.0
 
April 15, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 15, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 15, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 3.0 μg/m3 (13) 44.0
 
April 15, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
April 15, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A -3.0 μg/m3 (0) 42.0
 
April 15, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 1.0 μg/m3 (5) 39.0
 
April 15, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 15, 2021, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A 28.0 ppb (26) N/A N/A 12.0 μg/m3 (50) 50.0
 
April 15, 2021, noon N/A N/A N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 15, 2021, 11 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 9.0 ppb (9) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 15, 2021, 10 a.m. N/A N/A N/A 8.0 ppb (8) N/A N/A 14.0 ppb (13) N/A N/A 9.0 μg/m3 (38) 38.0
 
April 15, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 15, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
April 15, 2021, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
April 15, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 8.0 μg/m3 (34) 39.0
 
April 15, 2021, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) N/A N/A 11.0 μg/m3 (46) 46.0
 
April 15, 2021, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 9.0 μg/m3 (38) 44.0
 
April 15, 2021, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 15, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) N/A N/A 15.0 μg/m3 (58) 58.0
 
April 15, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 46.0 ppb (43) N/A N/A 14.0 μg/m3 (55) 55.0
 
April 15, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 15.0 μg/m3 (58) 58.0
 
April 14, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) N/A N/A 12.0 μg/m3 (50) 50.0
 
April 14, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) N/A N/A 7.0 μg/m3 (30) 50.0
 
April 14, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 59.0 ppb (65) N/A N/A 11.0 μg/m3 (46) 65.0
 
April 14, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 66.0 ppb (87) N/A N/A 15.0 μg/m3 (58) 87.0
 
April 14, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A 66.0 ppb (87) N/A N/A 8.0 μg/m3 (34) 87.0