AQSQID: 100032004

Site Name: Mlk

Location: Wilmington, DE

Reporting: True, Located: True

Current AQI: 33.0

Wilmington DE, US: 39.7394, -75.5581

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) N/A 4.1 μg/m3 (17) 33.0
 
May 25, 2019, 8 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 4.2 μg/m3 (18) 33.0
 
May 25, 2019, 7 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 4.1 μg/m3 (17) 33.0
 
May 25, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.13 ppb (1) N/A 3.7 μg/m3 (15) 32.0
 
May 25, 2019, 5 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 40.0 ppb (31) 0.13 ppb (1) N/A 3.7 μg/m3 (15) 31.0
 
May 25, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) N/A 3.8 μg/m3 (16) 31.0
 
May 25, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.12 ppb (1) N/A 4.4 μg/m3 (18) 30.0
 
May 25, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) N/A 4.4 μg/m3 (18) 28.0
 
May 25, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.12 ppb (1) N/A 4.4 μg/m3 (18) 27.0
 
May 25, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.13 ppb (1) N/A 4.6 μg/m3 (19) 26.0
 
May 25, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) N/A 5.2 μg/m3 (22) 23.0
 
May 25, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 25, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.15 ppb (2) N/A 4.3 μg/m3 (18) 21.0
 
May 25, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A 4.1 μg/m3 (17) 24.0
 
May 25, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.14 ppb (2) N/A 4.3 μg/m3 (18) 25.0
 
May 25, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) N/A 4.4 μg/m3 (18) 26.0
 
May 25, 2019, 5 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 4.5 μg/m3 (19) 27.0
 
May 25, 2019, 4 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 5.1 μg/m3 (21) 28.0
 
May 25, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) N/A 5.3 μg/m3 (22) 32.0
 
May 25, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.19 ppb (2) N/A 5.2 μg/m3 (22) 33.0
 
May 25, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.28 ppb (3) N/A 4.8 μg/m3 (20) 31.0
 
May 25, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.29 ppb (3) N/A 4.3 μg/m3 (18) 30.0
 
May 24, 2019, 11 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 3.3 μg/m3 (14) 34.0
 
May 24, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.22 ppb (2) N/A 3.1 μg/m3 (13) 37.0
 
May 24, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) N/A 3.1 μg/m3 (13) 37.0
 
May 24, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 36.0
 
May 24, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) N/A 3.3 μg/m3 (14) 35.0
 
May 24, 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 3.3 μg/m3 (14) 35.0
 
May 24, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) N/A 3.7 μg/m3 (15) 35.0
 
May 24, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.12 ppb (1) N/A 4.1 μg/m3 (17) 35.0
 
May 24, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A 3.9 μg/m3 (16) 34.0
 
May 24, 2019, 2 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 3.3 μg/m3 (14) 33.0
 
May 24, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) 0.21 ppb (2) N/A 5.1 μg/m3 (21) 35.0
 
May 23, 2019, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 47.0 ppb (36) 0.22 ppb (2) N/A 9.5 μg/m3 (40) 40.0
 
May 23, 2019, 10 p.m. N/A N/A N/A N/A N/A 3.0 ppb (4) 46.0 ppb (35) 0.25 ppb (3) N/A 10.1 μg/m3 (42) 42.0
 
May 23, 2019, 9 p.m. N/A N/A N/A N/A N/A 4.0 ppb (6) 42.0 ppb (32) 0.28 ppb (3) N/A 9.5 μg/m3 (40) 40.0
 
May 23, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) 0.25 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
May 23, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) 0.22 ppb (2) N/A 7.2 μg/m3 (30) 32.0
 
May 23, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) 0.17 ppb (2) N/A 6.3 μg/m3 (26) 33.0
 
May 23, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) N/A 6.5 μg/m3 (27) 28.0
 
May 23, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.17 ppb (2) N/A 5.7 μg/m3 (24) 25.0
 
May 23, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.17 ppb (2) N/A 4.9 μg/m3 (20) 27.0
 
May 23, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A 4.5 μg/m3 (19) 28.0
 
May 23, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 32.0 ppb (25) 0.13 ppb (1) N/A 4.3 μg/m3 (18) 25.0
 
May 23, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 4.9 μg/m3 (20) 22.0
 
May 23, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 22.0 ppb (17) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
May 23, 2019, 10 a.m. N/A N/A N/A N/A N/A 7.0 ppb (10) 25.0 ppb (19) 0.16 ppb (2) N/A 4.2 μg/m3 (18) 19.0
 
May 23, 2019, 9 a.m. N/A N/A N/A N/A N/A 5.0 ppb (7) 29.0 ppb (22) 0.13 ppb (1) N/A 3.9 μg/m3 (16) 22.0
 
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 31.0 ppb (24) 0.12 ppb (1) N/A 3.7 μg/m3 (15) 24.0
 
May 23, 2019, 7 a.m. N/A N/A N/A N/A N/A 5.0 ppb (7) 30.0 ppb (23) 0.12 ppb (1) N/A 3.7 μg/m3 (15) 23.0
 
May 23, 2019, 6 a.m. N/A N/A N/A N/A N/A 9.0 ppb (13) 30.0 ppb (23) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 23.0
 
May 23, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 28.0 ppb (22) 0.14 ppb (2) N/A 4.3 μg/m3 (18) 22.0
 
May 23, 2019, 4 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 30.0 ppb (23) 0.17 ppb (2) N/A 4.5 μg/m3 (19) 23.0
 
May 23, 2019, 3 a.m. N/A N/A N/A N/A N/A 3.0 ppb (4) 24.0 ppb (18) 0.21 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
May 23, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 21.0 ppb (16) 0.2 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
May 23, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) N/A 5.5 μg/m3 (23) 24.0
 
May 23, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) N/A 4.7 μg/m3 (20) 31.0
 
May 22, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 35.0
 
May 22, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) 0.16 ppb (2) N/A 4.3 μg/m3 (18) 38.0
 
May 22, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 51.0 ppb (39) 0.19 ppb (2) N/A 4.1 μg/m3 (17) 39.0
 
May 22, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 54.0 ppb (42) 0.19 ppb (2) N/A 4.5 μg/m3 (19) 42.0
 
May 22, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 4.6 μg/m3 (19) 41.0
 
May 22, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) 0.16 ppb (2) N/A 4.7 μg/m3 (20) 38.0
 
May 22, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 46.0 ppb (35) 0.17 ppb (2) N/A 4.7 μg/m3 (20) 35.0
 
May 22, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) N/A 4.2 μg/m3 (18) 32.0
 
May 22, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) 0.14 ppb (2) N/A 4.1 μg/m3 (17) 30.0
 
May 22, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) N/A 3.5 μg/m3 (15) 28.0
 
May 22, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 22.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.21 ppb (2) N/A 3.5 μg/m3 (15) 20.0
 
May 22, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.23 ppb (3) N/A 3.5 μg/m3 (15) 18.0
 
May 22, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 18.0 ppb (14) 0.22 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
May 22, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.17 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
May 22, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.14 ppb (2) N/A 3.1 μg/m3 (13) 19.0
 
May 22, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 24.0
 
May 22, 2019, 6 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 3.0 μg/m3 (12) 27.0
 
May 22, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.12 ppb (1) N/A 3.0 μg/m3 (12) 28.0
 
May 22, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) N/A 3.1 μg/m3 (13) 28.0
 
May 22, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 3.2 μg/m3 (13) 28.0
 
May 22, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.22 ppb (2) N/A 4.2 μg/m3 (18) 21.0
 
May 22, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
May 22, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) N/A 3.6 μg/m3 (15) 22.0
 
May 21, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.17 ppb (2) N/A 3.5 μg/m3 (15) 25.0
 
May 21, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) N/A 3.2 μg/m3 (13) 29.0
 
May 21, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 3.1 μg/m3 (13) 29.0
 
May 21, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) N/A 3.1 μg/m3 (13) 29.0
 
May 21, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 3.2 μg/m3 (13) 28.0
 
May 21, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.14 ppb (2) N/A 3.1 μg/m3 (13) 29.0
 
May 21, 2019, 5 p.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 2.9 μg/m3 (12) 28.0
 
May 21, 2019, 4 p.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 2.8 μg/m3 (12) 28.0
 
May 21, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.13 ppb (1) N/A 2.9 μg/m3 (12) 28.0
 
May 21, 2019, 2 p.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 3.1 μg/m3 (13) 25.0
 
May 21, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) N/A 3.6 μg/m3 (15) 21.0
 
May 21, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 3.7 μg/m3 (15) 20.0
 
May 21, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) N/A 3.8 μg/m3 (16) 20.0
 
May 21, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.13 ppb (1) N/A 3.2 μg/m3 (13) 24.0
 
May 21, 2019, 9 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 3.4 μg/m3 (14) 24.0
 
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 26.0
 
May 21, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 28.0
 
May 21, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 28.0
 
May 21, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 29.0
 
May 21, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.11 ppb (1) N/A 6.1 μg/m3 (25) 29.0
 
May 21, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) N/A 7.0 μg/m3 (29) 31.0
 
May 21, 2019, 2 a.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 7.2 μg/m3 (30) 32.0
 
May 21, 2019, 1 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 6.3 μg/m3 (26) 33.0
 
May 21, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 6.3 μg/m3 (26) 38.0
 
May 20, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
May 20, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.22 ppb (2) N/A 11.5 μg/m3 (48) 48.0
 
May 20, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 61.0 ppb (47) 0.24 ppb (3) N/A 11.7 μg/m3 (49) 49.0
 
May 20, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 63.0 ppb (48) 0.2 ppb (2) N/A 11.4 μg/m3 (48) 48.0
 
May 20, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 61.0 ppb (47) 0.19 ppb (2) N/A 11.3 μg/m3 (47) 47.0
 
May 20, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 65.0 ppb (50) 0.2 ppb (2) N/A 11.7 μg/m3 (49) 50.0
 
May 20, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 66.0 ppb (51) 0.2 ppb (2) N/A 12.0 μg/m3 (50) 51.0
 
May 20, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 65.0 ppb (50) 0.18 ppb (2) N/A 12.4 μg/m3 (51) 51.0
 
May 20, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 58.0 ppb (45) N/A N/A 12.9 μg/m3 (52) 52.0
 
May 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A 0.18 ppb (2) N/A 12.8 μg/m3 (52) 52.0
 
May 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A 0.18 ppb (2) N/A 12.7 μg/m3 (51) 51.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 12.4 μg/m3 (51) 51.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.25 ppb (3) N/A 13.2 μg/m3 (53) 53.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
May 20, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 29.0 ppb (22) 0.18 ppb (2) N/A 13.6 μg/m3 (53) 53.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.15 ppb (2) N/A 13.3 μg/m3 (53) 53.0
 
May 20, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.17 ppb (2) N/A 13.9 μg/m3 (54) 54.0
 
May 20, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A 14.2 μg/m3 (55) 55.0
 
May 20, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.17 ppb (2) N/A 14.5 μg/m3 (55) 55.0
 
May 20, 2019, 4 a.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 14.1 μg/m3 (54) 54.0
 
May 20, 2019, 3 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 13.1 μg/m3 (52) 52.0
 
May 20, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) 0.19 ppb (2) N/A 12.8 μg/m3 (52) 52.0
 
May 20, 2019, 1 a.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 13.0 μg/m3 (52) 52.0
 
May 20, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.19 ppb (2) N/A 13.1 μg/m3 (52) 52.0
 
May 19, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.2 ppb (2) N/A 12.4 μg/m3 (51) 51.0
 
May 19, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.2 ppb (2) N/A 12.3 μg/m3 (51) 51.0
 
May 19, 2019, 9 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 11.9 μg/m3 (50) 50.0
 
May 19, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.2 ppb (2) N/A 11.5 μg/m3 (48) 48.0
 
May 19, 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 11.2 μg/m3 (47) 47.0
 
May 19, 2019, 6 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 11.1 μg/m3 (46) 46.0
 
May 19, 2019, 5 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 10.8 μg/m3 (45) 45.0
 
May 19, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) N/A 9.5 μg/m3 (40) 40.0
 
May 19, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 9.1 μg/m3 (38) 38.0
 
May 19, 2019, 2 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 8.6 μg/m3 (36) 36.0
 
May 19, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) N/A 8.5 μg/m3 (35) 35.0
 
May 19, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.15 ppb (2) N/A 8.1 μg/m3 (34) 34.0
 
May 19, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.15 ppb (2) N/A 7.6 μg/m3 (32) 32.0
 
May 19, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.16 ppb (2) N/A 7.2 μg/m3 (30) 30.0
 
May 19, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.15 ppb (2) N/A 7.2 μg/m3 (30) 30.0
 
May 19, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) 0.15 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
May 19, 2019, 7 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 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.15 ppb (2) N/A 6.8 μg/m3 (28) 29.0
 
May 19, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) N/A 6.9 μg/m3 (29) 29.0
 
May 19, 2019, 4 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 6.6 μg/m3 (28) 30.0
 
May 19, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
May 19, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) N/A 5.2 μg/m3 (22) 33.0
 
May 19, 2019, 1 a.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 5.9 μg/m3 (25) 34.0
 
May 19, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 44.0 ppb (34) 0.15 ppb (2) N/A 7.2 μg/m3 (30) 34.0
 
May 18, 2019, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 47.0 ppb (36) 0.16 ppb (2) N/A 8.3 μg/m3 (35) 36.0
 
May 18, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) N/A 10.7 μg/m3 (45) 45.0
 
May 18, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 59.0 ppb (45) 0.18 ppb (2) N/A 10.7 μg/m3 (45) 45.0
 
May 18, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 63.0 ppb (48) 0.17 ppb (2) N/A 9.8 μg/m3 (41) 48.0
 
May 18, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 66.0 ppb (51) 0.17 ppb (2) N/A 9.6 μg/m3 (40) 51.0
 
May 18, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 65.0 ppb (50) 0.16 ppb (2) N/A 8.8 μg/m3 (37) 50.0
 
May 18, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 59.0 ppb (45) 0.15 ppb (2) N/A 8.2 μg/m3 (34) 45.0
 
May 18, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 55.0 ppb (42) 0.14 ppb (2) N/A 7.3 μg/m3 (30) 42.0
 
May 18, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.15 ppb (2) N/A 6.9 μg/m3 (29) 38.0
 
May 18, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) N/A 5.2 μg/m3 (22) 35.0
 
May 18, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A 4.9 μg/m3 (20) 34.0
 
May 18, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 7.8 μg/m3 (32) 32.0
 
May 18, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 18, 2019, 10 a.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 10.8 μg/m3 (45) 45.0
 
May 18, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.15 ppb (2) N/A 12.3 μg/m3 (51) 51.0