AQSQID: 490353013

Site Name: Herriman #3

Location: Herriman, UT

Reporting: True, Located: True

Current AQI: 38.0

Herriman UT, US: 40.496408, -112.036305

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 11 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 1.6 μg/m3 (7) 38.0
 
March 23, 2019, 10 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 1.6 μg/m3 (7) 38.0
 
March 23, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 4.1 μg/m3 (17) 38.0
 
March 23, 2019, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 3.7 μg/m3 (15) 38.0
 
March 23, 2019, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 7.0 μg/m3 (29) 38.0
 
March 23, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 7.3 μg/m3 (30) 38.0
 
March 23, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 5.3 μg/m3 (22) 36.0
 
March 23, 2019, 4 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 5.5 μg/m3 (23) 34.0
 
March 22, 2019, 10 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
March 22, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
March 22, 2019, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 0.6 μg/m3 (2) 38.0
 
March 22, 2019, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
March 22, 2019, 6 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 1.2 μg/m3 (5) 38.0
 
March 22, 2019, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 1.4 μg/m3 (6) 38.0
 
March 22, 2019, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 1.2 μg/m3 (5) 39.0
 
March 22, 2019, 3 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 1.2 μg/m3 (5) 38.0
 
March 22, 2019, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 1.0 μg/m3 (4) 37.0
 
March 22, 2019, 1 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 1.1 μg/m3 (5) 36.0
 
March 22, 2019, noon 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 1.1 μg/m3 (5) 37.0
 
March 22, 2019, 11 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
March 22, 2019, 10 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 0.7 μg/m3 (3) 35.0
 
March 22, 2019, 9 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
March 22, 2019, 8 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
March 22, 2019, 7 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 0.6 μg/m3 (2) 38.0
 
March 22, 2019, 6 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 0.6 μg/m3 (2) 38.0
 
March 22, 2019, 5 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
March 22, 2019, 4 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 0.5 μg/m3 (2) 39.0
 
March 22, 2019, 3 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 0.4 μg/m3 (2) 40.0
 
March 22, 2019, 2 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A N/A 0.6 μg/m3 (2) 41.0
 
March 22, 2019, 1 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A N/A 1.0 μg/m3 (4) 40.0
 
March 22, 2019, midnight 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) N/A N/A 2.7 μg/m3 (11) 42.0
 
March 21, 2019, 11 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 55.0 ppb (42) N/A N/A 4.1 μg/m3 (17) 42.0
 
March 21, 2019, 10 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (42) N/A N/A 3.6 μg/m3 (15) 42.0
 
March 21, 2019, 9 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) N/A N/A 3.4 μg/m3 (14) 40.0
 
March 21, 2019, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.5 μg/m3 (6) 42.0
 
March 21, 2019, 7 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) N/A N/A 1.4 μg/m3 (6) 40.0
 
March 21, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) N/A N/A 0.9 μg/m3 (4) 41.0
 
March 21, 2019, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) N/A N/A 0.4 μg/m3 (2) 39.0
 
March 21, 2019, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) N/A N/A 0.6 μg/m3 (2) 38.0
 
March 21, 2019, 3 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) N/A N/A 1.5 μg/m3 (6) 41.0
 
March 21, 2019, 2 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) N/A N/A 1.6 μg/m3 (7) 39.0
 
March 21, 2019, 1 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) N/A N/A 1.8 μg/m3 (8) 41.0
 
March 21, 2019, noon 5.0 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) N/A N/A 2.1 μg/m3 (9) 39.0
 
March 21, 2019, 11 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
March 21, 2019, 10 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) N/A N/A 1.5 μg/m3 (6) 34.0
 
March 21, 2019, 9 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 1.3 μg/m3 (5) 38.0
 
March 21, 2019, 8 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) N/A N/A 1.3 μg/m3 (5) 39.0
 
March 21, 2019, 7 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 1.2 μg/m3 (5) 44.0
 
March 21, 2019, 6 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 1.3 μg/m3 (5) 44.0
 
March 21, 2019, 5 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.4 μg/m3 (6) 43.0
 
March 21, 2019, 4 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.5 μg/m3 (6) 43.0
 
March 21, 2019, 3 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 1.8 μg/m3 (8) 44.0
 
March 21, 2019, 2 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 1.9 μg/m3 (8) 44.0
 
March 21, 2019, 1 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A N/A 1.7 μg/m3 (7) 42.0
 
March 21, 2019, midnight 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) N/A N/A 1.7 μg/m3 (7) 44.0
 
March 20, 2019, 11 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) N/A N/A 2.0 μg/m3 (8) 45.0
 
March 20, 2019, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 1.9 μg/m3 (8) 46.0
 
March 20, 2019, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 1.8 μg/m3 (8) 46.0
 
March 20, 2019, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 1.9 μg/m3 (8) 46.0
 
March 20, 2019, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 2.0 μg/m3 (8) 46.0
 
March 20, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 60.0 ppb (46) N/A N/A 2.4 μg/m3 (10) 46.0
 
March 20, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) N/A N/A 2.2 μg/m3 (9) 45.0
 
March 20, 2019, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) N/A N/A 2.0 μg/m3 (8) 45.0
 
March 20, 2019, 3 p.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A 49.0 ppb (38) N/A N/A 2.6 μg/m3 (11) 38.0
 
March 20, 2019, 2 p.m. 15.0 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A N/A 41.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
March 20, 2019, 1 p.m. 20.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A 33.0 ppb (25) N/A N/A 2.3 μg/m3 (10) 25.0
 
March 20, 2019, noon 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 42.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
March 20, 2019, 11 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) N/A N/A 1.5 μg/m3 (6) 38.0
 
March 20, 2019, 10 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.5 μg/m3 (6) 42.0
 
March 20, 2019, 9 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.5 μg/m3 (6) 42.0
 
March 20, 2019, 8 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 1.7 μg/m3 (7) 38.0
 
March 20, 2019, 7 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) N/A N/A 2.0 μg/m3 (8) 38.0
 
March 20, 2019, 6 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) N/A N/A 3.2 μg/m3 (13) 36.0
 
March 20, 2019, 5 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) N/A N/A 3.7 μg/m3 (15) 39.0
 
March 20, 2019, 4 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 49.0 ppb (38) N/A N/A 4.4 μg/m3 (18) 38.0
 
March 20, 2019, 3 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 41.0 ppb (32) N/A N/A 5.9 μg/m3 (25) 32.0
 
March 20, 2019, 2 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 41.0 ppb (32) N/A N/A 7.5 μg/m3 (31) 32.0
 
March 20, 2019, 1 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 50.0 ppb (38) N/A N/A 8.2 μg/m3 (34) 38.0
 
March 20, 2019, midnight 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 58.0 ppb (45) N/A N/A 7.0 μg/m3 (29) 45.0
 
March 19, 2019, 11 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 58.0 ppb (45) N/A N/A 6.2 μg/m3 (26) 45.0
 
March 19, 2019, 10 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) N/A N/A 7.5 μg/m3 (31) 43.0
 
March 19, 2019, 9 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 54.0 ppb (42) N/A N/A 6.7 μg/m3 (28) 42.0
 
March 19, 2019, 8 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) N/A N/A 4.7 μg/m3 (20) 42.0
 
March 19, 2019, 7 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) N/A N/A 4.6 μg/m3 (19) 42.0
 
March 19, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (41) N/A N/A 5.4 μg/m3 (23) 41.0
 
March 19, 2019, 5 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) N/A N/A 5.8 μg/m3 (24) 39.0
 
March 19, 2019, 4 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A 46.0 ppb (35) N/A N/A 5.6 μg/m3 (23) 35.0
 
March 19, 2019, 3 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A 41.0 ppb (32) N/A N/A 4.9 μg/m3 (20) 32.0
 
March 19, 2019, 2 p.m. 28.0 ppb (26) 8.0 ppb (7) N/A 20.0 ppb (19) N/A N/A 24.0 ppb (18) N/A N/A 4.7 μg/m3 (20) 26.0
 
March 19, 2019, 1 p.m. 18.0 ppb (17) 2.0 ppb (2) N/A 16.0 ppb (15) N/A N/A 24.0 ppb (18) N/A N/A 3.7 μg/m3 (15) 18.0
 
March 19, 2019, noon 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 27.0 ppb (21) N/A N/A 2.9 μg/m3 (12) 21.0
 
March 19, 2019, 11 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 26.0 ppb (20) N/A N/A 2.5 μg/m3 (10) 20.0
 
March 19, 2019, 10 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 26.0 ppb (20) N/A N/A 2.5 μg/m3 (10) 20.0
 
March 19, 2019, 9 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 24.0 ppb (18) N/A N/A 2.4 μg/m3 (10) 18.0
 
March 19, 2019, 8 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) N/A N/A 2.4 μg/m3 (10) 20.0
 
March 19, 2019, 7 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
March 19, 2019, 6 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 25.0 ppb (19) N/A N/A 2.9 μg/m3 (12) 19.0
 
March 19, 2019, 5 a.m. 17.0 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A 24.0 ppb (18) N/A N/A 3.7 μg/m3 (15) 18.0
 
March 19, 2019, 4 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 4.0 μg/m3 (17) 27.0
 
March 19, 2019, 3 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 4.6 μg/m3 (19) 27.0
 
March 19, 2019, 2 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) N/A N/A 5.1 μg/m3 (21) 32.0
 
March 19, 2019, 1 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (38) N/A N/A 6.3 μg/m3 (26) 38.0
 
March 19, 2019, midnight 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 51.0 ppb (39) N/A N/A 6.9 μg/m3 (29) 39.0
 
March 18, 2019, 11 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 54.0 ppb (42) N/A N/A 10.6 μg/m3 (44) 44.0
 
March 18, 2019, 10 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 54.0 ppb (42) N/A N/A 13.3 μg/m3 (53) 53.0
 
March 18, 2019, 9 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 9.0 ppb (8) N/A N/A 52.0 ppb (40) N/A N/A 14.7 μg/m3 (56) 56.0
 
March 18, 2019, 8 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 55.0 ppb (42) N/A N/A 13.2 μg/m3 (53) 53.0
 
March 18, 2019, 7 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 53.0 ppb (41) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 6 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A 46.0 ppb (35) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 18, 2019, 5 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A 45.0 ppb (35) N/A N/A 9.9 μg/m3 (41) 41.0
 
March 18, 2019, 4 p.m. 20.0 ppb (19) 6.0 ppb (6) N/A 13.0 ppb (12) N/A N/A 39.0 ppb (30) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 18, 2019, 3 p.m. 27.0 ppb (25) 8.0 ppb (7) N/A 19.0 ppb (18) N/A N/A 30.0 ppb (23) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 2 p.m. 27.0 ppb (25) 6.0 ppb (6) N/A 21.0 ppb (19) N/A N/A 22.0 ppb (17) N/A N/A 7.3 μg/m3 (30) 30.0
 
March 18, 2019, 1 p.m. 26.0 ppb (24) 2.0 ppb (2) N/A 25.0 ppb (23) N/A N/A 19.0 ppb (15) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 18, 2019, noon 33.0 ppb (31) 1.0 ppb (1) N/A 32.0 ppb (30) N/A N/A 13.0 ppb (10) N/A N/A 7.8 μg/m3 (32) 32.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 6.4 μg/m3 (27) 27.0
 
March 18, 2019, 10 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 6.3 μg/m3 (26) 26.0
 
March 18, 2019, 9 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 34.0 ppb (26) N/A N/A 6.4 μg/m3 (27) 27.0
 
March 18, 2019, 8 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A N/A 29.0 ppb (22) N/A N/A 6.8 μg/m3 (28) 28.0
 
March 18, 2019, 7 a.m. 17.0 ppb (16) 1.0 ppb (1) N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 18, 2019, 6 a.m. 13.0 ppb (12) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 31.0 ppb (24) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 18, 2019, 5 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 6.3 μg/m3 (26) 28.0
 
March 18, 2019, 4 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 18, 2019, 3 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 38.0 ppb (29) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 2 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 18, 2019, 1 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 50.0 ppb (38) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, midnight 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 56.0 ppb (43) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 17, 2019, 11 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 57.0 ppb (44) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 17, 2019, 10 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 55.0 ppb (42) N/A N/A 15.7 μg/m3 (58) 58.0
 
March 17, 2019, 9 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 59.0 ppb (45) N/A N/A 14.5 μg/m3 (55) 55.0
 
March 17, 2019, 8 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 59.0 ppb (45) N/A N/A 13.2 μg/m3 (53) 53.0
 
March 17, 2019, 7 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (43) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 51.0 ppb (39) N/A N/A 14.6 μg/m3 (56) 56.0
 
March 17, 2019, 5 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A 47.0 ppb (36) N/A N/A 16.1 μg/m3 (59) 59.0
 
March 17, 2019, 4 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A 41.0 ppb (32) N/A N/A 15.7 μg/m3 (58) 58.0
 
March 17, 2019, 3 p.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A 39.0 ppb (30) N/A N/A 16.8 μg/m3 (60) 60.0
 
March 17, 2019, 2 p.m. 20.0 ppb (19) 4.0 ppb (4) N/A 17.0 ppb (16) N/A N/A 27.0 ppb (21) N/A N/A 17.6 μg/m3 (62) 62.0
 
March 17, 2019, 1 p.m. 17.0 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A 25.0 ppb (19) N/A N/A 19.5 μg/m3 (66) 66.0
 
March 17, 2019, noon 13.0 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 27.0 ppb (21) N/A N/A 16.8 μg/m3 (60) 60.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 16.7 μg/m3 (60) 60.0
 
March 17, 2019, 10 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 17, 2019, 9 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 31.0 ppb (24) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 17, 2019, 8 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) N/A N/A 13.6 μg/m3 (53) 53.0
 
March 17, 2019, 7 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 36.0 ppb (28) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 17, 2019, 6 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 17, 2019, 5 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A 26.0 ppb (20) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 17, 2019, 4 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 31.0 ppb (24) N/A N/A 6.5 μg/m3 (27) 27.0
 
March 17, 2019, 3 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 36.0 ppb (28) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 17, 2019, 2 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 1 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 49.0 ppb (38) N/A N/A 11.1 μg/m3 (46) 46.0
 
March 17, 2019, midnight 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 58.0 ppb (45) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 16, 2019, 11 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 59.0 ppb (45) N/A N/A 15.4 μg/m3 (57) 57.0
 
March 16, 2019, 10 p.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A 54.0 ppb (42) N/A N/A 14.5 μg/m3 (55) 55.0
 
March 16, 2019, 9 p.m. 23.0 ppb (21) 7.0 ppb (6) N/A 16.0 ppb (15) N/A N/A 45.0 ppb (35) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 16, 2019, 8 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A 49.0 ppb (38) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 16, 2019, 7 p.m. 15.0 ppb (14) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A 46.0 ppb (35) N/A N/A 15.9 μg/m3 (58) 58.0
 
March 16, 2019, 6 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A 43.0 ppb (33) N/A N/A 15.6 μg/m3 (58) 58.0
 
March 16, 2019, 5 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A 41.0 ppb (32) N/A N/A 14.1 μg/m3 (54) 54.0
 
March 16, 2019, 4 p.m. 16.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (10) N/A N/A 37.0 ppb (28) N/A N/A 14.6 μg/m3 (56) 56.0
 
March 16, 2019, 3 p.m. 23.0 ppb (21) 7.0 ppb (6) N/A 16.0 ppb (15) N/A N/A 30.0 ppb (23) N/A N/A 14.7 μg/m3 (56) 56.0
 
March 16, 2019, 2 p.m. 21.0 ppb (19) 4.0 ppb (4) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 16, 2019, 1 p.m. 18.0 ppb (17) 1.0 ppb (1) N/A 17.0 ppb (16) N/A N/A 22.0 ppb (17) N/A N/A 13.6 μg/m3 (53) 53.0
 
March 16, 2019, noon 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A 21.0 ppb (16) N/A N/A 12.2 μg/m3 (50) 50.0
 
March 16, 2019, 11 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A N/A N/A 11.6 μg/m3 (48) 48.0
 
March 16, 2019, 10 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 28.0 ppb (22) N/A N/A 10.3 μg/m3 (43) 43.0
 
March 16, 2019, 9 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 16, 2019, 8 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) N/A N/A 11.1 μg/m3 (46) 46.0
 
March 16, 2019, 7 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A N/A 28.0 ppb (22) N/A N/A 10.1 μg/m3 (42) 42.0