AQSQID: 310550019

Site Name: Ncore

Location: Omaha, NE

Reporting: True, Located: True

Current AQI: 25.0

Omaha NE, US: 41.2474, -95.9731

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 6 a.m. N/A 2.3 ppb (2) 18.5 ppb (17) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.23 ppb (3) 21.0 μg/m3 (19) 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 5 a.m. N/A 1.8 ppb (2) 19.0 ppb (18) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.29 ppb (3) 22.0 μg/m3 (20) 5.0 μg/m3 (21) 21.0
 
March 19, 2019, 4 a.m. N/A 3.0 ppb (3) 19.1 ppb (18) N/A N/A 1.0 ppb (1) 27.0 ppb (21) 0.25 ppb (3) 24.0 μg/m3 (22) 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 3 a.m. N/A 1.5 ppb (1) 17.6 ppb (16) N/A N/A 1.0 ppb (1) 28.0 ppb (22) 0.25 ppb (3) 25.0 μg/m3 (23) 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 2 a.m. N/A 1.9 ppb (2) 26.7 ppb (25) N/A N/A 1.0 ppb (1) 20.0 ppb (15) 0.31 ppb (3) 52.0 μg/m3 (47) 8.0 μg/m3 (33) 47.0
 
March 19, 2019, 1 a.m. N/A 2.6 ppb (2) 21.7 ppb (20) N/A N/A 1.0 ppb (1) 26.0 ppb (20) 0.27 ppb (3) 40.0 μg/m3 (36) 7.0 μg/m3 (29) 36.0
 
March 19, 2019, midnight N/A 1.0 ppb (1) 12.8 ppb (12) N/A N/A 1.0 ppb (1) 34.0 ppb (26) 0.22 ppb (2) 25.0 μg/m3 (23) 6.0 μg/m3 (25) 26.0
 
March 18, 2019, 11 p.m. N/A 1.3 ppb (1) 10.2 ppb (9) N/A N/A 1.0 ppb (1) 37.0 ppb (28) 0.2 ppb (2) 21.0 μg/m3 (19) 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 10 p.m. N/A 1.6 ppb (1) 9.1 ppb (8) N/A N/A 2.0 ppb (3) 39.0 ppb (30) 0.2 ppb (2) 24.0 μg/m3 (22) 6.0 μg/m3 (25) 30.0
 
March 18, 2019, 9 p.m. N/A 2.5 ppb (2) 11.0 ppb (10) N/A N/A 2.0 ppb (3) 38.0 ppb (29) 0.21 ppb (2) 28.0 μg/m3 (25) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 8 p.m. N/A 2.0 ppb (2) 9.0 ppb (8) N/A N/A 1.0 ppb (1) 40.0 ppb (31) 0.21 ppb (2) 21.0 μg/m3 (19) 7.0 μg/m3 (29) 31.0
 
March 18, 2019, 7 p.m. N/A 3.4 ppb (3) 12.0 ppb (11) N/A N/A 2.0 ppb (3) 37.0 ppb (28) 0.22 ppb (2) 28.0 μg/m3 (25) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 6 p.m. N/A 4.6 ppb (4) 14.3 ppb (13) N/A N/A 2.0 ppb (3) 35.0 ppb (27) 0.22 ppb (2) 29.0 μg/m3 (26) 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 5 p.m. N/A 3.6 ppb (3) 11.8 ppb (11) N/A N/A 2.0 ppb (3) 38.0 ppb (29) 0.26 ppb (3) 31.0 μg/m3 (28) 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 4 p.m. N/A 6.2 ppb (6) 18.4 ppb (17) N/A N/A 6.0 ppb (9) 33.0 ppb (25) 0.3 ppb (3) 33.0 μg/m3 (30) 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 3 p.m. N/A 15.0 ppb (14) 35.5 ppb (33) N/A N/A 11.0 ppb (16) 21.0 ppb (16) 0.35 ppb (4) 33.0 μg/m3 (30) 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 2 p.m. N/A 10.6 ppb (10) 29.9 ppb (28) N/A N/A 2.0 ppb (3) 20.0 ppb (15) 0.33 ppb (4) 23.0 μg/m3 (21) 19.0 μg/m3 (65) 65.0
 
March 18, 2019, 1 p.m. N/A 1.7 ppb (2) 15.9 ppb (15) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.29 ppb (3) 22.0 μg/m3 (20) 19.0 μg/m3 (65) 65.0
 
March 18, 2019, noon N/A 1.3 ppb (1) 20.3 ppb (19) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.34 ppb (4) 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 11 a.m. N/A 0.4 ppb (0) 15.0 ppb (14) N/A N/A 0.0 ppb (0) 23.0 ppb (18) N/A 8.0 μg/m3 (7) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 10 a.m. N/A 0.1 ppb (0) 8.9 ppb (8) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.23 ppb (3) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 9 a.m. N/A 0.1 ppb (0) 5.2 ppb (5) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.22 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 8 a.m. N/A 0.1 ppb (0) 5.1 ppb (5) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) 8.0 μg/m3 (7) 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 7 a.m. N/A 0.3 ppb (0) 4.8 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 28.0
 
March 18, 2019, 6 a.m. N/A 0.0 ppb (0) 4.2 ppb (4) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 28.0
 
March 18, 2019, 5 a.m. N/A 0.1 ppb (0) 7.3 ppb (7) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.23 ppb (3) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 27.0
 
March 18, 2019, 4 a.m. N/A 0.0 ppb (0) 10.1 ppb (9) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.25 ppb (3) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 3 a.m. N/A 0.0 ppb (0) 10.0 ppb (9) N/A N/A 0.0 ppb (0) 30.0 ppb (23) 0.3 ppb (3) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 23.0
 
March 18, 2019, 2 a.m. N/A 0.0 ppb (0) 6.5 ppb (6) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.25 ppb (3) 18.0 μg/m3 (16) 3.0 μg/m3 (12) 28.0
 
March 18, 2019, 1 a.m. N/A 0.0 ppb (0) 7.5 ppb (7) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.25 ppb (3) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 28.0
 
March 18, 2019, midnight N/A 0.0 ppb (0) 4.6 ppb (4) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.21 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 32.0
 
March 17, 2019, 11 p.m. N/A 0.1 ppb (0) 2.8 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 35.0
 
March 17, 2019, 10 p.m. N/A 0.1 ppb (0) 2.3 ppb (2) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 35.0
 
March 17, 2019, 9 p.m. N/A 0.2 ppb (0) 2.3 ppb (2) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 13.0 μg/m3 (12) 8.0 μg/m3 (33) 35.0
 
March 17, 2019, 8 p.m. N/A 0.3 ppb (0) 2.6 ppb (2) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.18 ppb (2) 12.0 μg/m3 (11) 7.0 μg/m3 (29) 34.0
 
March 17, 2019, 7 p.m. N/A 0.3 ppb (0) 2.9 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 35.0
 
March 17, 2019, 6 p.m. N/A 0.5 ppb (0) 3.3 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 14.0 μg/m3 (13) 7.0 μg/m3 (29) 35.0
 
March 17, 2019, 5 p.m. N/A 0.8 ppb (1) 4.2 ppb (4) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 34.0
 
March 17, 2019, 4 p.m. N/A 1.5 ppb (1) 6.2 ppb (6) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.22 ppb (2) 16.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 3 p.m. N/A 2.5 ppb (2) 9.3 ppb (9) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.23 ppb (3) 17.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 2 p.m. N/A 4.6 ppb (4) 15.9 ppb (15) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.26 ppb (3) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 21.0
 
March 17, 2019, 1 p.m. N/A 2.4 ppb (2) 16.0 ppb (15) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
March 17, 2019, noon N/A 0.5 ppb (0) 14.5 ppb (13) N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.35 ppb (4) 9.0 μg/m3 (8) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 11 a.m. N/A 0.0 ppb (0) 9.8 ppb (9) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 10 a.m. N/A 0.3 ppb (0) 10.2 ppb (9) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 9 a.m. N/A 0.1 ppb (0) 6.6 ppb (6) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 8 a.m. N/A 0.0 ppb (0) 4.9 ppb (5) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.18 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 7 a.m. N/A 0.1 ppb (0) 5.4 ppb (5) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.18 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 27.0
 
March 17, 2019, 6 a.m. N/A 0.2 ppb (0) 5.3 ppb (5) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.18 ppb (2) 13.0 μg/m3 (12) 4.0 μg/m3 (17) 28.0
 
March 17, 2019, 5 a.m. N/A 0.2 ppb (0) 5.0 ppb (5) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 30.0
 
March 17, 2019, 4 a.m. N/A 0.2 ppb (0) 5.1 ppb (5) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 30.0
 
March 17, 2019, 3 a.m. N/A 0.2 ppb (0) 5.2 ppb (5) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) 12.0 μg/m3 (11) 3.0 μg/m3 (12) 31.0
 
March 17, 2019, 2 a.m. N/A 0.2 ppb (0) 4.8 ppb (4) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 29.0
 
March 17, 2019, 1 a.m. N/A 0.2 ppb (0) 5.3 ppb (5) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 31.0
 
March 17, 2019, midnight N/A 0.1 ppb (0) 3.6 ppb (3) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 33.0
 
March 16, 2019, 11 p.m. N/A 0.2 ppb (0) 2.5 ppb (2) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 35.0
 
March 16, 2019, 10 p.m. N/A 0.2 ppb (0) 2.1 ppb (2) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.16 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 35.0
 
March 16, 2019, 9 p.m. N/A 0.2 ppb (0) 1.9 ppb (2) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 35.0
 
March 16, 2019, 8 p.m. N/A 0.3 ppb (0) 2.1 ppb (2) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 35.0
 
March 16, 2019, 7 p.m. N/A 0.4 ppb (0) 2.3 ppb (2) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 35.0
 
March 16, 2019, 6 p.m. N/A 0.7 ppb (1) 3.1 ppb (3) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 32.0
 
March 16, 2019, 5 p.m. N/A 1.6 ppb (1) 5.4 ppb (5) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 28.0
 
March 16, 2019, 4 p.m. N/A 2.3 ppb (2) 6.5 ppb (6) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.22 ppb (2) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 24.0
 
March 16, 2019, 3 p.m. N/A 3.8 ppb (4) 10.5 ppb (10) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.23 ppb (3) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 18.0
 
March 16, 2019, 2 p.m. N/A 2.9 ppb (3) 9.9 ppb (9) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.22 ppb (2) 17.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 1 p.m. N/A 3.2 ppb (3) 15.8 ppb (15) N/A N/A N/A 21.0 ppb (16) 0.24 ppb (3) 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
March 16, 2019, noon N/A 9.9 ppb (9) 39.9 ppb (37) N/A N/A 0.0 ppb (0) 3.0 ppb (2) N/A 20.0 μg/m3 (18) 8.0 μg/m3 (33) 37.0
 
March 16, 2019, 11 a.m. N/A 5.7 ppb (5) 32.8 ppb (30) N/A N/A 0.0 ppb (0) 7.0 ppb (5) 0.36 ppb (4) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 30.0
 
March 16, 2019, 10 a.m. N/A 0.2 ppb (0) 13.5 ppb (12) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.23 ppb (3) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 15.0
 
March 16, 2019, 9 a.m. N/A 0.2 ppb (0) 14.1 ppb (13) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.22 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 8 a.m. N/A 0.0 ppb (0) 20.3 ppb (19) N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.24 ppb (3) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 7 a.m. N/A 2.1 ppb (2) 31.0 ppb (29) N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.34 ppb (4) 25.0 μg/m3 (23) 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 6 a.m. N/A 2.9 ppb (3) 34.5 ppb (32) N/A N/A 0.0 ppb (0) 5.0 ppb (4) 0.43 ppb (5) 32.0 μg/m3 (29) 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 5 a.m. N/A 0.3 ppb (0) 22.2 ppb (21) N/A N/A 0.0 ppb (0) 14.0 ppb (11) 0.37 ppb (4) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 4 a.m. N/A 0.2 ppb (0) 12.7 ppb (12) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.42 ppb (5) 15.0 μg/m3 (14) 3.0 μg/m3 (12) 18.0
 
March 16, 2019, 3 a.m. N/A 0.0 ppb (0) 10.1 ppb (9) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.26 ppb (3) 16.0 μg/m3 (15) 2.0 μg/m3 (8) 20.0
 
March 16, 2019, 2 a.m. N/A 0.2 ppb (0) 11.2 ppb (10) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.25 ppb (3) 21.0 μg/m3 (19) 2.0 μg/m3 (8) 21.0
 
March 16, 2019, 1 a.m. N/A 0.2 ppb (0) 8.4 ppb (8) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.2 ppb (2) 15.0 μg/m3 (14) 1.0 μg/m3 (4) 24.0
 
March 16, 2019, midnight N/A 0.2 ppb (0) 3.9 ppb (4) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.17 ppb (2) 15.0 μg/m3 (14) 2.0 μg/m3 (8) 29.0
 
March 15, 2019, 11 p.m. N/A 0.3 ppb (0) 2.5 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 32.0
 
March 15, 2019, 10 p.m. N/A 0.4 ppb (0) 2.8 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.16 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 35.0
 
March 15, 2019, 9 p.m. N/A 0.5 ppb (0) 3.1 ppb (3) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) 19.0 μg/m3 (17) 8.0 μg/m3 (33) 35.0
 
March 15, 2019, 8 p.m. N/A 0.6 ppb (1) 2.8 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 15.0 μg/m3 (14) 7.0 μg/m3 (29) 35.0
 
March 15, 2019, 7 p.m. N/A 0.6 ppb (1) 2.9 ppb (3) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) 17.0 μg/m3 (15) 6.0 μg/m3 (25) 34.0
 
March 15, 2019, 6 p.m. N/A 0.6 ppb (1) 3.0 ppb (3) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) 18.0 μg/m3 (16) 5.0 μg/m3 (21) 34.0
 
March 15, 2019, 5 p.m. N/A 0.8 ppb (1) 3.7 ppb (3) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.21 ppb (2) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 33.0
 
March 15, 2019, 4 p.m. N/A 1.2 ppb (1) 3.6 ppb (3) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.21 ppb (2) N/A N/A 32.0
 
March 15, 2019, 3 p.m. N/A 0.8 ppb (1) 3.6 ppb (3) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.21 ppb (2) N/A N/A 32.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.22 ppb (2) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 30.0
 
March 15, 2019, 1 p.m. N/A 0.6 ppb (1) 4.9 ppb (5) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.22 ppb (2) 15.0 μg/m3 (14) -1.0 μg/m3 (0) 28.0
 
March 15, 2019, noon N/A 0.3 ppb (0) 4.6 ppb (4) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.21 ppb (2) 7.0 μg/m3 (6) -2.0 μg/m3 (0) 29.0
 
March 15, 2019, 11 a.m. N/A 0.2 ppb (0) 3.5 ppb (3) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.19 ppb (2) 10.0 μg/m3 (9) -4.0 μg/m3 (0) 29.0
 
March 15, 2019, 10 a.m. N/A 0.1 ppb (0) 2.4 ppb (2) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.19 ppb (2) 10.0 μg/m3 (9) N/A 31.0
 
March 15, 2019, 9 a.m. N/A 0.1 ppb (0) 2.1 ppb (2) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) 9.0 μg/m3 (8) N/A 31.0
 
March 15, 2019, 8 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 6.0 μg/m3 (5) -3.0 μg/m3 (0) 32.0
 
March 15, 2019, 7 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 32.0
 
March 15, 2019, 6 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 33.0
 
March 15, 2019, 5 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 35.0
 
March 15, 2019, 4 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.17 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 34.0
 
March 15, 2019, 3 a.m. N/A 0.1 ppb (0) 1.3 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 32.0
 
March 15, 2019, 2 a.m. N/A 0.1 ppb (0) 1.4 ppb (1) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 32.0
 
March 15, 2019, 1 a.m. N/A 0.1 ppb (0) 1.7 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 32.0
 
March 15, 2019, midnight N/A 0.2 ppb (0) 2.1 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 32.0
 
March 14, 2019, 11 p.m. N/A 0.2 ppb (0) 2.2 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 32.0
 
March 14, 2019, 10 p.m. N/A 0.3 ppb (0) 2.0 ppb (2) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.17 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 34.0
 
March 14, 2019, 9 p.m. N/A 0.4 ppb (0) 2.3 ppb (2) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.18 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 34.0
 
March 14, 2019, 8 p.m. N/A 0.4 ppb (0) 2.4 ppb (2) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 33.0
 
March 14, 2019, 7 p.m. N/A 0.4 ppb (0) 2.4 ppb (2) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 33.0
 
March 14, 2019, 6 p.m. N/A 0.4 ppb (0) 2.6 ppb (2) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) 0.0 μg/m3 (0) -2.0 μg/m3 (0) 33.0
 
March 14, 2019, 5 p.m. N/A 0.4 ppb (0) 2.4 ppb (2) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) -1.0 μg/m3 (0) -3.0 μg/m3 (0) 33.0
 
March 14, 2019, 4 p.m. N/A 0.4 ppb (0) 2.7 ppb (3) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.2 ppb (2) 2.0 μg/m3 (2) -4.0 μg/m3 (0) 32.0
 
March 14, 2019, 3 p.m. N/A 0.4 ppb (0) 2.6 ppb (2) N/A N/A 0.0 ppb (0) N/A 0.2 ppb (2) 2.0 μg/m3 (2) -2.0 μg/m3 (0) 2.0
 
March 14, 2019, 2 p.m. N/A 0.3 ppb (0) 2.5 ppb (2) N/A N/A 0.0 ppb (0) N/A 0.2 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 8.0
 
March 14, 2019, 1 p.m. N/A 0.2 ppb (0) 2.7 ppb (3) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 25.0
 
March 14, 2019, noon N/A 0.4 ppb (0) 8.8 ppb (8) N/A N/A 0.0 ppb (0) 25.0 ppb (19) 0.24 ppb (3) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 19.0
 
March 14, 2019, 11 a.m. N/A 0.4 ppb (0) 5.8 ppb (5) N/A N/A N/A 30.0 ppb (23) 0.22 ppb (2) 1.0 μg/m3 (1) 4.0 μg/m3 (17) 23.0
 
March 14, 2019, 10 a.m. N/A 0.3 ppb (0) 3.6 ppb (3) N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.18 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 25.0
 
March 14, 2019, 9 a.m. N/A 0.1 ppb (0) 1.2 ppb (1) N/A N/A 0.0 ppb (0) 31.0 ppb (24) 0.17 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 24.0
 
March 14, 2019, 8 a.m. N/A 0.3 ppb (0) 2.2 ppb (2) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.17 ppb (2) 17.0 μg/m3 (15) 4.0 μg/m3 (17) 25.0
 
March 14, 2019, 7 a.m. N/A 0.2 ppb (0) 2.2 ppb (2) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.16 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 27.0
 
March 14, 2019, 6 a.m. N/A 0.3 ppb (0) 3.0 ppb (3) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 28.0
 
March 14, 2019, 5 a.m. N/A 1.0 ppb (1) 3.6 ppb (3) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
March 14, 2019, 4 a.m. N/A 0.3 ppb (0) 2.5 ppb (2) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 29.0
 
March 14, 2019, 3 a.m. N/A 0.1 ppb (0) 2.2 ppb (2) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 30.0
 
March 14, 2019, 2 a.m. N/A 0.4 ppb (0) 2.9 ppb (3) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) -1.0 μg/m3 (0) 1.0 μg/m3 (4) 30.0
 
March 14, 2019, 1 a.m. N/A 0.9 ppb (1) 5.1 ppb (5) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 30.0
 
March 14, 2019, midnight N/A 1.0 ppb (1) 5.6 ppb (5) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 32.0
 
March 13, 2019, 11 p.m. N/A 1.1 ppb (1) 5.2 ppb (5) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 32.0
 
March 13, 2019, 10 p.m. N/A 1.5 ppb (1) 5.8 ppb (5) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 31.0
 
March 13, 2019, 9 p.m. N/A 2.2 ppb (2) 6.1 ppb (6) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.2 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 25.0
 
March 13, 2019, 8 p.m. N/A 2.7 ppb (3) 6.5 ppb (6) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.21 ppb (2) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 13, 2019, 7 p.m. N/A 2.2 ppb (2) 6.7 ppb (6) N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.19 ppb (2) 4.0 μg/m3 (4) 7.0 μg/m3 (29) 29.0
 
March 13, 2019, 6 p.m. N/A 1.7 ppb (2) 5.8 ppb (5) N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.18 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 16.0
 
March 13, 2019, 5 p.m. N/A 0.8 ppb (1) 4.3 ppb (4) N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.22 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 16.0
 
March 13, 2019, 4 p.m. N/A 0.8 ppb (1) 7.0 ppb (6) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.24 ppb (3) 1.0 μg/m3 (1) 4.0 μg/m3 (17) 17.0
 
March 13, 2019, 3 p.m. N/A 0.6 ppb (1) 6.5 ppb (6) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.24 ppb (3) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 13.0
 
March 13, 2019, 2 p.m. N/A 1.1 ppb (1) 7.7 ppb (7) N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.24 ppb (3) -1.0 μg/m3 (0) 3.0 μg/m3 (12) 12.0
 
March 13, 2019, 1 p.m. N/A 0.9 ppb (1) 9.5 ppb (9) N/A N/A N/A 9.0 ppb (7) 0.25 ppb (3) -1.0 μg/m3 (0) 3.0 μg/m3 (12) 12.0
 
March 13, 2019, noon N/A 0.7 ppb (1) 10.6 ppb (10) N/A N/A 0.0 ppb (0) 9.0 ppb (7) N/A 0.0 μg/m3 (0) 1.0 μg/m3 (4) 10.0
 
March 13, 2019, 11 a.m. N/A 0.5 ppb (0) 11.7 ppb (11) N/A N/A 0.0 ppb (0) 9.0 ppb (7) 0.26 ppb (3) -2.0 μg/m3 (0) 0.0 μg/m3 (0) 11.0
 
March 13, 2019, 10 a.m. N/A 0.5 ppb (0) 13.8 ppb (13) N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.27 ppb (3) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 13.0
 
March 13, 2019, 9 a.m. N/A 0.1 ppb (0) 9.1 ppb (8) N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.26 ppb (3) -1.0 μg/m3 (0) 1.0 μg/m3 (4) 10.0
 
March 13, 2019, 8 a.m. N/A 1.3 ppb (1) 7.5 ppb (7) N/A N/A 0.0 ppb (0) 16.0 ppb (12) 0.23 ppb (3) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 12.0
 
March 13, 2019, 7 a.m. N/A 4.6 ppb (4) 14.8 ppb (14) N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.25 ppb (3) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 14.0
 
March 13, 2019, 6 a.m. N/A 4.5 ppb (4) 14.9 ppb (14) N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.25 ppb (3) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 14.0
 
March 13, 2019, 5 a.m. N/A 3.1 ppb (3) 18.8 ppb (17) N/A N/A 0.0 ppb (0) 8.0 ppb (6) 0.31 ppb (3) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 17.0
 
March 13, 2019, 4 a.m. N/A 5.9 ppb (5) 19.9 ppb (18) N/A N/A 0.0 ppb (0) 10.0 ppb (8) 0.28 ppb (3) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 18.0
 
March 13, 2019, 3 a.m. N/A 6.0 ppb (6) 19.5 ppb (18) N/A N/A 0.0 ppb (0) 12.0 ppb (9) 0.27 ppb (3) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 18.0
 
March 13, 2019, 2 a.m. N/A 2.6 ppb (2) 14.9 ppb (14) N/A N/A 0.0 ppb (0) 15.0 ppb (12) 0.28 ppb (3) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 14.0
 
March 13, 2019, 1 a.m. N/A 2.9 ppb (3) 13.6 ppb (13) N/A N/A 0.0 ppb (0) 17.0 ppb (13) 0.25 ppb (3) 9.0 μg/m3 (8) 1.0 μg/m3 (4) 13.0
 
March 13, 2019, midnight N/A 2.9 ppb (3) 13.5 ppb (12) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.25 ppb (3) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 15.0
 
March 12, 2019, 11 p.m. N/A 3.3 ppb (3) 12.8 ppb (12) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.25 ppb (3) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 15.0
 
March 12, 2019, 10 p.m. N/A 4.0 ppb (4) 14.7 ppb (14) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.26 ppb (3) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 15.0
 
March 12, 2019, 9 p.m. N/A 2.4 ppb (2) 11.3 ppb (10) N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.28 ppb (3) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 17.0
 
March 12, 2019, 8 p.m. N/A 4.2 ppb (4) 15.9 ppb (15) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.26 ppb (3) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 15.0
 
March 12, 2019, 7 p.m. N/A 4.2 ppb (4) 16.9 ppb (16) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.24 ppb (3) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 6 p.m. N/A 7.5 ppb (7) 21.3 ppb (20) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.24 ppb (3) 13.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 5 p.m. N/A 6.7 ppb (6) 19.1 ppb (18) N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.24 ppb (3) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 4 p.m. N/A 7.4 ppb (7) 22.8 ppb (21) N/A N/A 0.0 ppb (0) 19.0 ppb (15) 0.27 ppb (3) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 12, 2019, 3 p.m. N/A 5.4 ppb (5) 20.1 ppb (19) N/A N/A 0.0 ppb (0) 21.0 ppb (16) 0.27 ppb (3) 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 12, 2019, 2 p.m. N/A 6.5 ppb (6) 22.8 ppb (21) N/A N/A 0.0 ppb (0) 20.0 ppb (15) 0.25 ppb (3) 9.0 μg/m3 (8) 9.0 μg/m3 (38) 38.0
 
March 12, 2019, 1 p.m. N/A 4.3 ppb (4) 21.2 ppb (20) N/A N/A 0.0 ppb (0) 22.0 ppb (17) 0.25 ppb (3) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
March 12, 2019, noon N/A 4.3 ppb (4) 17.6 ppb (16) N/A N/A 0.0 ppb (0) 26.0 ppb (20) 0.24 ppb (3) 17.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 12, 2019, 11 a.m. N/A 4.5 ppb (4) 16.8 ppb (16) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.23 ppb (3) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
March 12, 2019, 10 a.m. N/A 3.9 ppb (4) 16.4 ppb (15) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.21 ppb (2) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 25.0
 
March 12, 2019, 9 a.m. N/A 3.0 ppb (3) 16.3 ppb (15) N/A N/A 0.0 ppb (0) 28.0 ppb (22) 0.21 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
March 12, 2019, 8 a.m. N/A 2.4 ppb (2) 14.4 ppb (13) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 25.0
 
March 12, 2019, 7 a.m. N/A 3.7 ppb (3) 16.1 ppb (15) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0