AQSQID: 100032004

Site Name: Mlk

Location: Wilmington, DE

Reporting: True, Located: True

Current AQI: 54.0

Wilmington DE, US: 39.7394, -75.5581

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 25, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.28 ppb (3) N/A 13.9 μg/m3 (54) 54.0
 
March 25, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.3 ppb (3) N/A 13.2 μg/m3 (53) 53.0
 
March 25, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.31 ppb (3) N/A 12.1 μg/m3 (50) 50.0
 
March 25, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.31 ppb (3) N/A 11.2 μg/m3 (47) 47.0
 
March 25, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.31 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
March 25, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.26 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
March 25, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 25, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.25 ppb (3) N/A 7.5 μg/m3 (31) 32.0
 
March 25, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A 0.26 ppb (3) N/A 7.3 μg/m3 (30) 30.0
 
March 25, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A 0.42 ppb (5) N/A 8.9 μg/m3 (37) 37.0
 
March 25, 2019, noon N/A N/A N/A N/A N/A 2.0 ppb (3) 4.0 ppb (3) 0.56 ppb (6) N/A 10.2 μg/m3 (42) 42.0
 
March 25, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (1) 0.59 ppb (7) N/A 7.9 μg/m3 (33) 33.0
 
March 25, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 0.0 ppb (0) 0.47 ppb (5) N/A 6.7 μg/m3 (28) 28.0
 
March 25, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 6.0 ppb (5) 0.31 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
March 25, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.26 ppb (3) N/A 4.6 μg/m3 (19) 19.0
 
March 25, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.23 ppb (3) N/A 4.4 μg/m3 (18) 25.0
 
March 25, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.27 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
March 25, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.26 ppb (3) N/A 4.3 μg/m3 (18) 22.0
 
March 25, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.23 ppb (3) N/A 4.1 μg/m3 (17) 28.0
 
March 25, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.23 ppb (3) N/A 3.9 μg/m3 (16) 32.0
 
March 25, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.22 ppb (2) N/A 3.7 μg/m3 (15) 33.0
 
March 25, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.22 ppb (2) N/A 3.8 μg/m3 (16) 32.0
 
March 25, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.24 ppb (3) N/A 4.6 μg/m3 (19) 32.0
 
March 24, 2019, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 48.0 ppb (37) 0.21 ppb (2) N/A 3.8 μg/m3 (16) 37.0
 
March 24, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 52.0 ppb (40) 0.18 ppb (2) N/A 3.2 μg/m3 (13) 40.0
 
March 24, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 54.0 ppb (42) 0.18 ppb (2) N/A 3.3 μg/m3 (14) 42.0
 
March 24, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 54.0 ppb (42) 0.2 ppb (2) N/A 3.2 μg/m3 (13) 42.0
 
March 24, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.19 ppb (2) N/A 3.9 μg/m3 (16) 39.0
 
March 24, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) N/A 4.3 μg/m3 (18) 38.0
 
March 24, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.18 ppb (2) N/A 4.9 μg/m3 (20) 38.0
 
March 24, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) 0.18 ppb (2) N/A 5.6 μg/m3 (23) 38.0
 
March 24, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 47.0 ppb (36) 0.18 ppb (2) N/A 5.7 μg/m3 (24) 36.0
 
March 24, 2019, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 32.0
 
March 24, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.23 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
March 24, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 19.0 ppb (15) 0.3 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
March 24, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 5.0 ppb (4) 0.4 ppb (4) N/A 6.9 μg/m3 (29) 29.0
 
March 24, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 3.0 ppb (2) 0.33 ppb (4) N/A 6.3 μg/m3 (26) 26.0
 
March 24, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.31 ppb (3) N/A 5.8 μg/m3 (24) 24.0
 
March 24, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.28 ppb (3) N/A 5.4 μg/m3 (23) 23.0
 
March 24, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.29 ppb (3) N/A 4.5 μg/m3 (19) 19.0
 
March 24, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
March 24, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.23 ppb (3) N/A 3.5 μg/m3 (15) 22.0
 
March 24, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.25 ppb (3) N/A 3.4 μg/m3 (14) 25.0
 
March 24, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.23 ppb (3) N/A 3.7 μg/m3 (15) 25.0
 
March 24, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.25 ppb (3) N/A 3.3 μg/m3 (14) 26.0
 
March 24, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.21 ppb (2) N/A 3.1 μg/m3 (13) 28.0
 
March 24, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.22 ppb (2) N/A 2.7 μg/m3 (11) 28.0
 
March 23, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 32.0
 
March 23, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 33.0
 
March 23, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 34.0
 
March 23, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 34.0
 
March 23, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 2.1 μg/m3 (9) 32.0
 
March 23, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) N/A 2.3 μg/m3 (10) 33.0
 
March 23, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) N/A 2.5 μg/m3 (10) 34.0
 
March 23, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 32.0
 
March 23, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) N/A 2.9 μg/m3 (12) 31.0
 
March 23, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.14 ppb (2) N/A 2.7 μg/m3 (11) 27.0
 
March 23, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A 2.9 μg/m3 (12) 25.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 2.7 μg/m3 (11) 25.0
 
March 23, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.15 ppb (2) N/A 2.5 μg/m3 (10) 22.0
 
March 23, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A 2.5 μg/m3 (10) 22.0
 
March 23, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.12 ppb (1) N/A 2.3 μg/m3 (10) 23.0
 
March 23, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.12 ppb (1) N/A 2.1 μg/m3 (9) 24.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) N/A 1.8 μg/m3 (8) 25.0
 
March 23, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) N/A 1.4 μg/m3 (6) 25.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 27.0
 
March 23, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 1.1 μg/m3 (5) 28.0
 
March 23, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 1.4 μg/m3 (6) 28.0
 
March 23, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) N/A 1.6 μg/m3 (7) 28.0
 
March 23, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 27.0
 
March 23, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.17 ppb (2) N/A 2.5 μg/m3 (10) 27.0
 
March 22, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.19 ppb (2) N/A 2.8 μg/m3 (12) 28.0
 
March 22, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) N/A 3.9 μg/m3 (16) 30.0
 
March 22, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 30.0
 
March 22, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.18 ppb (2) N/A 6.1 μg/m3 (25) 32.0
 
March 22, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.18 ppb (2) N/A 7.5 μg/m3 (31) 32.0
 
March 22, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.18 ppb (2) N/A 7.3 μg/m3 (30) 32.0
 
March 22, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.19 ppb (2) N/A 5.8 μg/m3 (24) 32.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.21 ppb (2) N/A 4.8 μg/m3 (20) 32.0
 
March 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.23 ppb (3) N/A 5.4 μg/m3 (23) 32.0
 
March 22, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.21 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
March 22, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.22 ppb (2) N/A 10.3 μg/m3 (43) 43.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.27 ppb (3) N/A 5.6 μg/m3 (23) 23.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.23 ppb (3) N/A 2.7 μg/m3 (11) 23.0
 
March 22, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.18 ppb (2) N/A 1.1 μg/m3 (5) 27.0
 
March 22, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.16 ppb (2) N/A 0.5 μg/m3 (2) 27.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) N/A 0.6 μg/m3 (2) 30.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) N/A 0.7 μg/m3 (3) 30.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.18 ppb (2) N/A 1.3 μg/m3 (5) 28.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 1.1 μg/m3 (5) 33.0
 
March 22, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) N/A 3.2 μg/m3 (13) 33.0
 
March 22, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) N/A 4.4 μg/m3 (18) 33.0
 
March 22, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 30.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) N/A 5.2 μg/m3 (22) 31.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) N/A 6.1 μg/m3 (25) 32.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.2 ppb (2) N/A 6.3 μg/m3 (26) 32.0
 
March 21, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.2 ppb (2) N/A 6.5 μg/m3 (27) 32.0
 
March 21, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.24 ppb (3) N/A 5.5 μg/m3 (23) 30.0
 
March 21, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.26 ppb (3) N/A 6.3 μg/m3 (26) 29.0
 
March 21, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.31 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
March 21, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.27 ppb (3) N/A 5.5 μg/m3 (23) 28.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.32 ppb (4) N/A 5.6 μg/m3 (23) 23.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.25 ppb (3) N/A 6.2 μg/m3 (26) 26.0
 
March 21, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.23 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.26 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
March 21, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.28 ppb (3) N/A 6.7 μg/m3 (28) 28.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.26 ppb (3) N/A 7.6 μg/m3 (32) 32.0
 
March 21, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.25 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.22 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.22 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) N/A 6.8 μg/m3 (28) 30.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) N/A 6.3 μg/m3 (26) 31.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 32.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) N/A 5.7 μg/m3 (24) 34.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 33.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.18 ppb (2) N/A 5.2 μg/m3 (22) 34.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) N/A 5.2 μg/m3 (22) 33.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) N/A 4.9 μg/m3 (20) 35.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.21 ppb (2) N/A 4.8 μg/m3 (20) 35.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.22 ppb (2) N/A 4.7 μg/m3 (20) 36.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.21 ppb (2) N/A 4.7 μg/m3 (20) 37.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) N/A 5.1 μg/m3 (21) 39.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.35 ppb (4) N/A 19.9 μg/m3 (67) 67.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.49 ppb (5) N/A 25.9 μg/m3 (80) 80.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 2.0 ppb (2) 0.79 ppb (9) N/A 25.9 μg/m3 (80) 80.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 1.0 ppb (1) 0.81 ppb (9) N/A 20.1 μg/m3 (67) 67.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 1.0 ppb (1) 0.51 ppb (6) N/A 18.2 μg/m3 (63) 63.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.33 ppb (4) N/A 16.4 μg/m3 (59) 59.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 6.0 ppb (5) 0.33 ppb (4) N/A 15.7 μg/m3 (58) 58.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.3 ppb (3) N/A 14.6 μg/m3 (56) 56.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.28 ppb (3) N/A 13.5 μg/m3 (53) 53.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.3 ppb (3) N/A 12.6 μg/m3 (51) 51.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.3 ppb (3) N/A 12.3 μg/m3 (51) 51.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 2.0 ppb (2) 0.45 ppb (5) N/A 15.7 μg/m3 (58) 58.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 2.0 ppb (2) 0.44 ppb (5) N/A 14.7 μg/m3 (56) 56.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.43 ppb (5) N/A 9.6 μg/m3 (40) 40.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.24 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.27 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.24 ppb (3) N/A 7.5 μg/m3 (31) 34.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.23 ppb (3) N/A 6.4 μg/m3 (27) 35.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 34.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) N/A 5.9 μg/m3 (25) 35.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.16 ppb (2) N/A 5.4 μg/m3 (23) 35.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) N/A 5.4 μg/m3 (23) 33.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.19 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) N/A 5.8 μg/m3 (24) 31.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) N/A 5.1 μg/m3 (21) 30.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.24 ppb (3) N/A 6.4 μg/m3 (27) 27.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.39 ppb (4) N/A 8.8 μg/m3 (37) 37.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 6.0 ppb (5) 0.5 ppb (6) N/A 10.6 μg/m3 (44) 44.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.34 ppb (4) N/A 10.4 μg/m3 (43) 43.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.26 ppb (3) N/A 12.3 μg/m3 (51) 51.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.23 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.25 ppb (3) N/A 15.4 μg/m3 (57) 57.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) N/A 17.2 μg/m3 (61) 61.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.26 ppb (3) N/A 15.3 μg/m3 (57) 57.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.33 ppb (4) N/A 15.4 μg/m3 (57) 57.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.4 ppb (4) N/A 15.7 μg/m3 (58) 58.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.39 ppb (4) N/A 13.5 μg/m3 (53) 53.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.37 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.33 ppb (4) N/A 12.5 μg/m3 (51) 51.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.25 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.25 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.28 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.27 ppb (3) N/A 7.5 μg/m3 (31) 31.0