AQSQID: 270370480

Site Name: Lakeville - Near Road

Location: Lakeville, MN

Reporting: True, Located: True

Current AQI: 21.0

Lakeville MN, US: 44.706123, -93.285803

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 10 p.m. 18.1 ppb (17) 4.8 ppb (4) N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 9 p.m. 14.0 ppb (13) 3.8 ppb (4) N/A 10.0 ppb (9) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 8 p.m. 19.1 ppb (18) 6.6 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 7 p.m. 21.2 ppb (20) 7.8 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 0.0 μg/m3 (0) 20.0
 
March 22, 2019, 6 p.m. 20.1 ppb (19) 7.5 ppb (7) N/A 13.0 ppb (12) N/A N/A N/A 0.25 ppb (3) N/A 1.0 μg/m3 (4) 19.0
 
March 22, 2019, 5 p.m. 11.5 ppb (11) 3.4 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
March 22, 2019, 4 p.m. 19.4 ppb (18) 6.8 ppb (6) N/A 13.0 ppb (12) N/A N/A N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 22, 2019, 3 p.m. 24.3 ppb (23) 8.3 ppb (8) N/A 16.0 ppb (15) N/A N/A N/A 0.29 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 2 p.m. 15.3 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 1 p.m. 9.4 ppb (9) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 22, 2019, noon 8.2 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 11 a.m. 5.8 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 10 a.m. 14.4 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
March 22, 2019, 9 a.m. 26.8 ppb (25) 4.4 ppb (4) N/A 22.0 ppb (20) N/A N/A N/A 0.26 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
March 22, 2019, 8 a.m. 13.7 ppb (13) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
March 22, 2019, 7 a.m. 25.9 ppb (24) 1.1 ppb (1) N/A 25.0 ppb (23) N/A N/A N/A 0.29 ppb (3) N/A 22.0 μg/m3 (71) 71.0
 
March 22, 2019, 6 a.m. 24.8 ppb (23) 2.0 ppb (2) N/A 23.0 ppb (21) N/A N/A N/A 0.28 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
March 22, 2019, 5 a.m. 4.7 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
March 22, 2019, 4 a.m. 4.1 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
March 22, 2019, 3 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
March 22, 2019, 2 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
March 22, 2019, 1 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 22, 2019, midnight 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 21, 2019, 11 p.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
March 21, 2019, 10 p.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 9 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 8 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 7 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 6 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 5 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 4 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 3 p.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 2 p.m. 4.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 1 p.m. 5.7 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 21, 2019, noon 13.1 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 21, 2019, 11 a.m. 23.5 ppb (22) 1.8 ppb (2) N/A 22.0 ppb (20) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 10 a.m. 8.9 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 9 a.m. 21.9 ppb (20) 2.3 ppb (2) N/A 20.0 ppb (19) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 8 a.m. 17.2 ppb (16) 2.4 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 7 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 6 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 4 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 3 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 2 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 1 a.m. 6.6 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, midnight 6.7 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 20, 2019, 11 p.m. 14.6 ppb (14) 2.2 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 20, 2019, 10 p.m. 5.6 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 9 p.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 8 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 7 p.m. 2.9 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 6 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 5 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 4 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 3 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 2 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 1 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, noon 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 11 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 10 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 9 a.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 8 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 7 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 6 a.m. 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 5 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 4 a.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 3 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 2 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 1 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, midnight 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 10 p.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 9 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 19, 2019, 8 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 7 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 6 p.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 19, 2019, 5 p.m. 1.7 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 19, 2019, 4 p.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 19, 2019, 3 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 2 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 1 p.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 19, 2019, noon 13.4 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 11 a.m. 23.4 ppb (22) 3.5 ppb (3) N/A 20.0 ppb (19) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 10 a.m. 19.6 ppb (18) 2.7 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 9 a.m. 10.2 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 8 a.m. 8.7 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 7 a.m. 9.3 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 6 a.m. 11.6 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 5 a.m. 18.0 ppb (17) 0.1 ppb (0) N/A 18.0 ppb (17) N/A N/A N/A 0.26 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 4 a.m. 22.6 ppb (21) 0.0 ppb (0) N/A 23.0 ppb (21) N/A N/A N/A 0.32 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
March 19, 2019, 3 a.m. 30.5 ppb (28) 0.7 ppb (1) N/A 30.0 ppb (28) N/A N/A N/A 0.35 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 2 a.m. 11.6 ppb (11) 0.2 ppb (0) N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 1 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, midnight 3.3 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 11 p.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 10 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 9 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 8 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 7 p.m. 3.3 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 6 p.m. 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 5 p.m. 4.1 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 4 p.m. 3.7 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 3 p.m. 4.7 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 2 p.m. 5.6 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 1 p.m. 3.9 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, noon 5.7 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 11 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 10 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 9 a.m. 3.9 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 7 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
March 18, 2019, 6 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
March 18, 2019, 5 a.m. 4.8 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 3 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 2 a.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 1 a.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, midnight 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 11 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 10 p.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 9 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 8 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 7 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 6 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 5 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.19 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 3 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
March 17, 2019, 1 p.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.21 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, noon 1.4 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.2 ppb (2) N/A 20.0 μg/m3 (67) 67.0
 
March 17, 2019, 11 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 9 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 8 a.m. 2.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 7 a.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 6 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 5 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 4 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 3 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 2 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 1 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, midnight 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 11 p.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 10 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 9 p.m. 0.9 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 16, 2019, 8 p.m. 1.1 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 1.0 μg/m3 (4) 4.0
 
March 16, 2019, 7 p.m. 1.2 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
March 16, 2019, 6 p.m. 1.4 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 5 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 4 p.m. 5.2 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 3 p.m. 6.3 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 2 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 1 p.m. 5.2 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, noon 6.2 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 11 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 9 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 8 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 7 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 6 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 5 a.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 4 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 3 a.m. 1.1 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 2 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 1 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, midnight 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, 11 p.m. 0.7 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0