ID: 1155

AQSQID: 100032004

Site Name: Mlk

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

Updated: May 14, 2021, 10:47 p.m.

Location: Wilmington (Justison Landing), DE

Reporting: True, Located: True

Current AQI: 55.0

Wilmington (Justison Landing) DE, US: 39.7394, -75.5581

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 14, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 56.0 ppb (55) 0.19 ppb (3) N/A 5.7 μg/m3 (24) 55.0
 
May 14, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 56.0 ppb (55) 0.18 ppb (3) N/A 5.3 μg/m3 (23) 55.0
 
May 14, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 53.0 ppb (50) 0.2 ppb (3) N/A 5.4 μg/m3 (23) 50.0
 
May 14, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 51.0 ppb (48) 0.17 ppb (3) N/A 5.1 μg/m3 (22) 48.0
 
May 14, 2021, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) N/A 4.7 μg/m3 (20) 45.0
 
May 14, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 4.7 μg/m3 (20) 43.0
 
May 14, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 44.0 ppb (41) 0.2 ppb (3) N/A 6.3 μg/m3 (27) 41.0
 
May 14, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) 0.2 ppb (3) N/A 4.7 μg/m3 (20) 39.0
 
May 14, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.22 ppb (3) N/A 4.9 μg/m3 (21) 36.0
 
May 14, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) 0.25 ppb (3) N/A 5.8 μg/m3 (25) 28.0
 
May 14, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.24 ppb (3) N/A 6.3 μg/m3 (27) 27.0
 
May 14, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.26 ppb (4) N/A 6.5 μg/m3 (28) 28.0
 
May 14, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.21 ppb (3) N/A 6.8 μg/m3 (29) 29.0
 
May 14, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.2 ppb (3) N/A 6.8 μg/m3 (29) 29.0
 
May 14, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.22 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
May 14, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.27 ppb (4) N/A 10.8 μg/m3 (46) 46.0
 
May 14, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) 0.29 ppb (4) N/A 8.4 μg/m3 (36) 36.0
 
May 14, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) 0.34 ppb (4) N/A 8.1 μg/m3 (34) 34.0
 
May 14, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.21 ppb (3) N/A 5.4 μg/m3 (23) 27.0
 
May 14, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.26 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
May 14, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.36 ppb (5) N/A 7.4 μg/m3 (31) 31.0
 
May 14, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.3 ppb (4) N/A 6.4 μg/m3 (27) 30.0
 
May 13, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 38.0
 
May 13, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (40) 0.2 ppb (3) N/A 4.2 μg/m3 (18) 40.0
 
May 13, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) 0.2 ppb (3) N/A 4.1 μg/m3 (18) 45.0
 
May 13, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 50.0 ppb (47) 0.18 ppb (3) N/A 4.3 μg/m3 (18) 47.0
 
May 13, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (46) 0.2 ppb (3) N/A 4.2 μg/m3 (18) 46.0
 
May 13, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) 0.19 ppb (3) N/A 4.3 μg/m3 (18) 46.0
 
May 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 42.0
 
May 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.17 ppb (3) N/A 3.9 μg/m3 (17) 40.0
 
May 13, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.19 ppb (3) N/A 3.9 μg/m3 (17) 38.0
 
May 13, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (32) 0.22 ppb (3) N/A 3.9 μg/m3 (17) 32.0
 
May 13, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.24 ppb (3) N/A 4.2 μg/m3 (18) 29.0
 
May 13, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.22 ppb (3) N/A 3.9 μg/m3 (17) 26.0
 
May 13, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.23 ppb (3) N/A 3.6 μg/m3 (16) 23.0
 
May 13, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) 0.23 ppb (3) N/A 3.8 μg/m3 (16) 17.0
 
May 13, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) 0.19 ppb (3) N/A 3.6 μg/m3 (16) 17.0
 
May 13, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.17 ppb (3) N/A 3.7 μg/m3 (16) 24.0
 
May 13, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.18 ppb (3) N/A 4.1 μg/m3 (18) 26.0
 
May 13, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 4.3 μg/m3 (18) 25.0
 
May 13, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.2 ppb (3) N/A 4.2 μg/m3 (18) 25.0
 
May 13, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.22 ppb (3) N/A 4.5 μg/m3 (19) 23.0
 
May 13, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.23 ppb (3) N/A 4.8 μg/m3 (20) 24.0
 
May 13, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.29 ppb (4) N/A 5.2 μg/m3 (22) 22.0
 
May 13, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.35 ppb (4) N/A 6.8 μg/m3 (29) 29.0
 
May 13, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.32 ppb (4) N/A 6.4 μg/m3 (27) 27.0
 
May 12, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.21 ppb (3) N/A 3.7 μg/m3 (16) 31.0
 
May 12, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) N/A 3.4 μg/m3 (15) 36.0
 
May 12, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) N/A 3.4 μg/m3 (15) 38.0
 
May 12, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.19 ppb (3) N/A 3.3 μg/m3 (14) 37.0
 
May 12, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) N/A 3.3 μg/m3 (14) 38.0
 
May 12, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) N/A 3.4 μg/m3 (15) 36.0
 
May 12, 2021, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.19 ppb (3) N/A 3.2 μg/m3 (14) 35.0
 
May 12, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) N/A 3.2 μg/m3 (14) 34.0
 
May 12, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) N/A 3.1 μg/m3 (13) 31.0
 
May 12, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.22 ppb (3) N/A 3.4 μg/m3 (15) 28.0
 
May 12, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 3.8 μg/m3 (16) 25.0
 
May 12, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.19 ppb (3) N/A 3.5 μg/m3 (15) 25.0
 
May 12, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (19) 0.19 ppb (3) N/A 3.2 μg/m3 (14) 19.0
 
May 12, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.18 ppb (3) N/A 2.6 μg/m3 (11) 21.0
 
May 12, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.16 ppb (3) N/A 1.6 μg/m3 (7) 23.0
 
May 12, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.16 ppb (3) N/A 1.5 μg/m3 (7) 22.0
 
May 12, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.15 ppb (2) N/A 1.2 μg/m3 (5) 26.0
 
May 12, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 1.3 μg/m3 (6) 28.0
 
May 12, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 28.0
 
May 12, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 2.6 μg/m3 (11) 29.0
 
May 12, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) N/A 3.7 μg/m3 (16) 30.0
 
May 12, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 36.0
 
May 12, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) 0.19 ppb (3) N/A 5.4 μg/m3 (23) 38.0
 
May 12, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) 0.18 ppb (3) N/A 5.1 μg/m3 (22) 41.0
 
May 11, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.2 ppb (3) N/A 5.6 μg/m3 (24) 43.0
 
May 11, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (44) 0.18 ppb (3) N/A 5.6 μg/m3 (24) 44.0
 
May 11, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (44) 0.18 ppb (3) N/A 4.8 μg/m3 (20) 44.0
 
May 11, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (44) 0.18 ppb (3) N/A 4.5 μg/m3 (19) 44.0
 
May 11, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) 0.19 ppb (3) N/A 5.4 μg/m3 (23) 45.0
 
May 11, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 45.0
 
May 11, 2021, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (46) 0.18 ppb (3) N/A 7.1 μg/m3 (30) 46.0
 
May 11, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (45) 0.18 ppb (3) N/A 7.3 μg/m3 (31) 45.0
 
May 11, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) 0.21 ppb (3) N/A 7.5 μg/m3 (32) 42.0
 
May 11, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) 0.2 ppb (3) N/A 5.8 μg/m3 (25) 39.0
 
May 11, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) N/A 4.2 μg/m3 (18) 34.0
 
May 11, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.2 ppb (3) N/A 3.6 μg/m3 (16) 16.0
 
May 10, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (40) 0.19 ppb (3) N/A 3.3 μg/m3 (14) 40.0
 
May 10, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) 0.19 ppb (3) N/A 3.3 μg/m3 (14) 39.0
 
May 10, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 3.2 μg/m3 (14) 36.0
 
May 10, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
May 10, 2021, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.19 ppb (3) N/A 3.2 μg/m3 (14) 35.0
 
May 10, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) N/A 2.1 μg/m3 (9) 33.0
 
May 10, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
May 10, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.2 ppb (3) N/A 2.9 μg/m3 (13) 29.0
 
May 10, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 3.6 μg/m3 (16) 26.0
 
May 10, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 3.2 μg/m3 (14) 25.0
 
May 10, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.22 ppb (3) N/A 3.5 μg/m3 (15) 24.0
 
May 10, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.21 ppb (3) N/A 4.9 μg/m3 (21) 23.0
 
May 10, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.21 ppb (3) N/A 10.1 μg/m3 (43) 43.0
 
May 10, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.21 ppb (3) N/A 7.8 μg/m3 (33) 33.0
 
May 10, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.21 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
May 10, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.23 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
May 10, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.23 ppb (3) N/A 7.3 μg/m3 (31) 31.0
 
May 10, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.2 ppb (3) N/A 6.7 μg/m3 (28) 35.0
 
May 10, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.2 ppb (3) N/A 6.1 μg/m3 (26) 34.0
 
May 10, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.21 ppb (3) N/A 5.9 μg/m3 (25) 35.0
 
May 10, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.21 ppb (3) N/A 5.6 μg/m3 (24) 37.0
 
May 10, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 38.0
 
May 9, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.21 ppb (3) N/A 4.9 μg/m3 (21) 37.0
 
May 9, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 37.0
 
May 9, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (32) 0.2 ppb (3) N/A 5.7 μg/m3 (24) 32.0
 
May 9, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) N/A 5.8 μg/m3 (25) 33.0
 
May 9, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) N/A 5.6 μg/m3 (24) 33.0
 
May 9, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) N/A 5.6 μg/m3 (24) 33.0
 
May 9, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) 0.18 ppb (3) N/A 5.5 μg/m3 (23) 31.0
 
May 9, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.18 ppb (3) N/A 5.1 μg/m3 (22) 30.0
 
May 9, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A 5.7 μg/m3 (24) 27.0
 
May 9, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.19 ppb (3) N/A 6.3 μg/m3 (27) 27.0
 
May 9, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.19 ppb (3) N/A 5.9 μg/m3 (25) 27.0
 
May 9, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.18 ppb (3) N/A 5.1 μg/m3 (22) 26.0
 
May 9, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
May 9, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.19 ppb (3) N/A 5.2 μg/m3 (22) 23.0
 
May 9, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) N/A 5.8 μg/m3 (25) 25.0
 
May 9, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
May 9, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.19 ppb (3) N/A 6.5 μg/m3 (28) 28.0
 
May 9, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.22 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
May 9, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.22 ppb (3) N/A 7.5 μg/m3 (32) 32.0
 
May 9, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.23 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
May 9, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
May 9, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.23 ppb (3) N/A 5.4 μg/m3 (23) 25.0
 
May 9, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.22 ppb (3) N/A 3.8 μg/m3 (16) 28.0
 
May 9, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (31) 0.23 ppb (3) N/A 3.6 μg/m3 (16) 31.0
 
May 8, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.2 ppb (3) N/A 4.1 μg/m3 (18) 34.0
 
May 8, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.2 ppb (3) N/A 5.5 μg/m3 (23) 35.0
 
May 8, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.19 ppb (3) N/A 5.6 μg/m3 (24) 36.0
 
May 8, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) N/A 7.1 μg/m3 (30) 36.0
 
May 8, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.19 ppb (3) N/A 6.5 μg/m3 (28) 38.0
 
May 8, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.18 ppb (3) N/A 5.9 μg/m3 (25) 38.0
 
May 8, 2021, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.19 ppb (3) N/A 5.6 μg/m3 (24) 36.0
 
May 8, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) 0.18 ppb (3) N/A 5.2 μg/m3 (22) 38.0
 
May 8, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) N/A 5.8 μg/m3 (25) 34.0
 
May 8, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) 0.18 ppb (3) N/A 4.8 μg/m3 (20) 30.0
 
May 8, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.18 ppb (3) N/A 4.7 μg/m3 (20) 26.0
 
May 8, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.19 ppb (3) N/A 6.1 μg/m3 (26) 26.0
 
May 8, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (19) 0.19 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
May 8, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) 0.2 ppb (3) N/A 7.8 μg/m3 (33) 33.0
 
May 8, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) 0.2 ppb (3) N/A 7.7 μg/m3 (33) 33.0
 
May 8, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) 0.38 ppb (5) N/A 7.4 μg/m3 (31) 31.0
 
May 8, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) 0.2 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
May 8, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 4.9 μg/m3 (21) 26.0
 
May 8, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A 5.4 μg/m3 (23) 27.0
 
May 8, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) 0.22 ppb (3) N/A 6.8 μg/m3 (29) 29.0
 
May 8, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (28) 0.22 ppb (3) N/A 6.2 μg/m3 (26) 28.0
 
May 8, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
May 8, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) 0.21 ppb (3) N/A 6.8 μg/m3 (29) 35.0
 
May 8, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.22 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
May 7, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) 0.22 ppb (3) N/A 6.5 μg/m3 (28) 33.0
 
May 7, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) 0.2 ppb (3) N/A 4.1 μg/m3 (18) 39.0
 
May 7, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) 0.19 ppb (3) N/A 3.7 μg/m3 (16) 41.0
 
May 7, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 46.0 ppb (43) 0.18 ppb (3) N/A 3.5 μg/m3 (15) 43.0
 
May 7, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 3.7 μg/m3 (16) 43.0
 
May 7, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) 0.18 ppb (3) N/A 3.9 μg/m3 (17) 42.0
 
May 7, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 40.0
 
May 7, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) 0.2 ppb (3) N/A 3.6 μg/m3 (16) 37.0
 
May 7, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) 0.21 ppb (3) N/A 3.9 μg/m3 (17) 32.0
 
May 7, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) 0.21 ppb (3) N/A 3.6 μg/m3 (16) 30.0
 
May 7, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) 0.28 ppb (4) N/A 3.5 μg/m3 (15) 26.0
 
May 7, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 2.8 μg/m3 (12) 29.0
 
May 7, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) 0.18 ppb (3) N/A 3.1 μg/m3 (13) 27.0
 
May 7, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) 0.2 ppb (3) N/A 3.8 μg/m3 (16) 25.0
 
May 7, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) 0.26 ppb (4) N/A 5.5 μg/m3 (23) 23.0
 
May 7, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) 0.27 ppb (4) N/A 5.7 μg/m3 (24) 24.0