AQSQID: 490050007

Site Name: Smithfield

Location: Smithfield, UT

Reporting: False, Located: True

Current AQI: None

Smithfield UT, US: 41.842778, -111.85194

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A 3.0 μg/m3 (3) 4.5 μg/m3 (19) 36.0
 
March 22, 2019, 9 p.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 3.0 μg/m3 (3) 4.2 μg/m3 (18) 35.0
 
March 22, 2019, 8 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A 0.0 μg/m3 (0) 0.1 μg/m3 (0) 36.0
 
March 22, 2019, 7 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 2.0 μg/m3 (2) 3.1 μg/m3 (13) 36.0
 
March 22, 2019, 6 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A 1.0 μg/m3 (1) 2.3 μg/m3 (10) 38.0
 
March 22, 2019, 5 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A -1.0 μg/m3 (0) 0.3 μg/m3 (1) 38.0
 
March 22, 2019, 4 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 1.0 μg/m3 (1) 1.6 μg/m3 (7) 37.0
 
March 22, 2019, 3 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A 1.0 μg/m3 (1) 1.8 μg/m3 (8) 33.0
 
March 22, 2019, 2 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 1.0 μg/m3 (4) 31.0
 
March 22, 2019, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) N/A 1.0 μg/m3 (1) 1.9 μg/m3 (8) 33.0
 
March 22, 2019, noon 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A 3.0 μg/m3 (3) 3.9 μg/m3 (16) 36.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 3.0 μg/m3 (3) 3.6 μg/m3 (15) 34.0
 
March 22, 2019, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A 2.0 μg/m3 (2) 2.7 μg/m3 (11) 32.0
 
March 22, 2019, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A 2.0 μg/m3 (2) 2.2 μg/m3 (9) 35.0
 
March 22, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 38.0
 
March 22, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 35.0
 
March 22, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) N/A 8.0 μg/m3 (7) 6.1 μg/m3 (25) 39.0
 
March 22, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) N/A 12.0 μg/m3 (11) 4.0 μg/m3 (17) 40.0
 
March 22, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A 10.0 μg/m3 (9) 6.1 μg/m3 (25) 35.0
 
March 22, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A 6.0 μg/m3 (5) 2.2 μg/m3 (9) 36.0
 
March 22, 2019, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A 12.0 μg/m3 (11) 5.6 μg/m3 (23) 35.0
 
March 22, 2019, 1 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 37.0
 
March 22, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 40.0
 
March 21, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 42.0
 
March 21, 2019, 10 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A 7.0 μg/m3 (6) 3.8 μg/m3 (16) 42.0
 
March 21, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) N/A 9.0 μg/m3 (8) 4.1 μg/m3 (17) 42.0
 
March 21, 2019, 8 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 39.0
 
March 21, 2019, 7 p.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 9.0 μg/m3 (8) 2.5 μg/m3 (10) 42.0
 
March 21, 2019, 6 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) N/A 12.0 μg/m3 (11) 5.4 μg/m3 (23) 30.0
 
March 21, 2019, 5 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A 12.0 μg/m3 (11) 7.3 μg/m3 (30) 30.0
 
March 21, 2019, 4 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) N/A 14.0 μg/m3 (13) 4.7 μg/m3 (20) 20.0
 
March 21, 2019, 3 p.m. 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 2.7 μg/m3 (11) 22.0
 
March 21, 2019, 2 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 3.4 μg/m3 (14) 22.0
 
March 21, 2019, 1 p.m. 11.0 ppb (10) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) N/A 5.0 μg/m3 (5) 1.6 μg/m3 (7) 18.0
 
March 21, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 1.8 μg/m3 (8) 22.0
 
March 21, 2019, 11 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 21.0
 
March 21, 2019, 10 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 1.9 μg/m3 (8) 26.0
 
March 21, 2019, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A 6.0 μg/m3 (5) 3.5 μg/m3 (15) 31.0
 
March 21, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 26.0
 
March 21, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) -1.3 μg/m3 (0) 29.0
 
March 21, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) 2.3 μg/m3 (10) 30.0
 
March 21, 2019, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 33.0
 
March 21, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 38.0
 
March 21, 2019, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 39.0
 
March 21, 2019, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 60.0 ppb (46) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (4) 46.0
 
March 21, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) N/A 5.0 μg/m3 (5) -0.2 μg/m3 (0) 43.0
 
March 21, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 58.0 ppb (45) N/A 6.0 μg/m3 (5) 1.4 μg/m3 (6) 45.0
 
March 20, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 62.0 ppb (48) N/A 5.0 μg/m3 (5) -1.5 μg/m3 (0) 48.0
 
March 20, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 62.0 ppb (48) N/A 1.0 μg/m3 (1) -0.8 μg/m3 (0) 48.0
 
March 20, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 62.0 ppb (48) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 48.0
 
March 20, 2019, 8 p.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 61.0 ppb (47) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 47.0
 
March 20, 2019, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 59.0 ppb (45) N/A 9.0 μg/m3 (8) 3.5 μg/m3 (15) 45.0
 
March 20, 2019, 6 p.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 7.0 μg/m3 (6) 4.4 μg/m3 (18) 43.0
 
March 20, 2019, 5 p.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 4.0 μg/m3 (4) 1.4 μg/m3 (6) 41.0
 
March 20, 2019, 4 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 5.0 μg/m3 (5) 2.4 μg/m3 (10) 37.0
 
March 20, 2019, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 28.0
 
March 20, 2019, 2 p.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) N/A 19.0 μg/m3 (17) 4.9 μg/m3 (20) 20.0
 
March 20, 2019, 1 p.m. 31.0 ppb (29) 3.0 ppb (3) N/A 28.0 ppb (26) N/A N/A 16.0 ppb (12) N/A 12.0 μg/m3 (11) 5.0 μg/m3 (21) 29.0
 
March 20, 2019, noon 12.0 ppb (11) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 23.0
 
March 20, 2019, 11 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 3.1 μg/m3 (13) 27.0
 
March 20, 2019, 10 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 4.7 μg/m3 (20) 28.0
 
March 20, 2019, 9 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) N/A 7.0 μg/m3 (6) 5.6 μg/m3 (23) 23.0
 
March 20, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) 2.5 μg/m3 (10) 27.0
 
March 20, 2019, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 3.6 μg/m3 (15) 27.0
 
March 20, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) 3.2 μg/m3 (13) 32.0
 
March 20, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 35.0
 
March 20, 2019, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 4.1 μg/m3 (17) 36.0
 
March 20, 2019, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 36.0
 
March 20, 2019, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 41.0
 
March 20, 2019, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 42.0
 
March 20, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A 6.0 μg/m3 (5) 3.6 μg/m3 (15) 42.0
 
March 19, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 43.0
 
March 19, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 43.0
 
March 19, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A 4.0 μg/m3 (4) 2.6 μg/m3 (11) 43.0
 
March 19, 2019, 8 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A 7.0 μg/m3 (6) 4.5 μg/m3 (19) 42.0
 
March 19, 2019, 7 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 6.0 μg/m3 (5) 3.9 μg/m3 (16) 38.0
 
March 19, 2019, 6 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 8.0 μg/m3 (7) 6.4 μg/m3 (27) 38.0
 
March 19, 2019, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 4.2 μg/m3 (18) 35.0
 
March 19, 2019, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A 11.0 μg/m3 (10) 6.4 μg/m3 (27) 32.0
 
March 19, 2019, 3 p.m. 14.0 ppb (13) 7.0 ppb (6) N/A 8.0 ppb (7) N/A N/A 30.0 ppb (23) N/A 23.0 μg/m3 (21) 8.4 μg/m3 (35) 35.0
 
March 19, 2019, 2 p.m. 46.0 ppb (43) 19.0 ppb (18) N/A 28.0 ppb (26) N/A N/A 14.0 ppb (11) N/A 14.0 μg/m3 (13) 4.8 μg/m3 (20) 43.0
 
March 19, 2019, 1 p.m. 28.0 ppb (26) 5.0 ppb (5) N/A 24.0 ppb (22) N/A N/A 13.0 ppb (10) N/A 6.0 μg/m3 (5) 2.8 μg/m3 (12) 26.0
 
March 19, 2019, noon 18.0 ppb (17) 1.0 ppb (1) N/A 17.0 ppb (16) N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 5.3 μg/m3 (22) 22.0
 
March 19, 2019, 11 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A 20.0 ppb (15) N/A 10.0 μg/m3 (9) 8.7 μg/m3 (36) 36.0
 
March 19, 2019, 10 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) N/A 7.0 μg/m3 (6) 5.8 μg/m3 (24) 24.0
 
March 19, 2019, 9 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 4.9 μg/m3 (20) 20.0
 
March 19, 2019, 8 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 21.0
 
March 19, 2019, 7 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) 4.7 μg/m3 (20) 21.0
 
March 19, 2019, 6 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 5 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) N/A 11.0 μg/m3 (10) 6.7 μg/m3 (28) 28.0
 
March 19, 2019, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A 10.0 μg/m3 (9) 3.8 μg/m3 (16) 27.0
 
March 19, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 0.9 μg/m3 (4) 27.0
 
March 19, 2019, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) -0.7 μg/m3 (0) 28.0
 
March 19, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A 10.0 μg/m3 (9) 4.3 μg/m3 (18) 29.0
 
March 19, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A -1.0 μg/m3 (0) -1.7 μg/m3 (0) 38.0
 
March 18, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A 6.0 μg/m3 (5) 3.5 μg/m3 (15) 38.0
 
March 18, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A 2.0 μg/m3 (2) 1.4 μg/m3 (6) 38.0
 
March 18, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A 5.0 μg/m3 (5) 5.7 μg/m3 (24) 39.0
 
March 18, 2019, 8 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 8.0 μg/m3 (7) 6.5 μg/m3 (27) 38.0
 
March 18, 2019, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A 5.0 μg/m3 (5) 3.7 μg/m3 (15) 35.0
 
March 18, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 5.4 μg/m3 (23) 32.0
 
March 18, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 33.0
 
March 18, 2019, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A 6.0 μg/m3 (5) 3.8 μg/m3 (16) 31.0
 
March 18, 2019, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 2 p.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) N/A 12.0 μg/m3 (11) 6.6 μg/m3 (28) 28.0
 
March 18, 2019, 1 p.m. 27.0 ppb (25) 4.0 ppb (4) N/A 24.0 ppb (22) N/A N/A 15.0 ppb (12) N/A 10.0 μg/m3 (9) 5.6 μg/m3 (23) 25.0
 
March 18, 2019, noon 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A 17.0 ppb (13) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
March 18, 2019, 11 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 4.5 μg/m3 (19) 22.0
 
March 18, 2019, 10 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A 8.0 μg/m3 (7) 7.2 μg/m3 (30) 30.0
 
March 18, 2019, 9 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 6.5 μg/m3 (27) 27.0
 
March 18, 2019, 8 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 3.7 μg/m3 (15) 22.0
 
March 18, 2019, 7 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 0.5 μg/m3 (2) 23.0
 
March 18, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 25.0
 
March 18, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 25.0
 
March 18, 2019, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) 2.1 μg/m3 (9) 25.0
 
March 18, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 2.7 μg/m3 (11) 26.0
 
March 18, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 4.2 μg/m3 (18) 32.0
 
March 18, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 33.0
 
March 18, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A -3.0 μg/m3 (0) -1.9 μg/m3 (0) 39.0
 
March 17, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) N/A 7.0 μg/m3 (6) 6.4 μg/m3 (27) 41.0
 
March 17, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 40.0
 
March 17, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A 4.0 μg/m3 (4) 3.9 μg/m3 (16) 40.0
 
March 17, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A 5.0 μg/m3 (5) 4.2 μg/m3 (18) 39.0
 
March 17, 2019, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A 10.0 μg/m3 (9) 9.2 μg/m3 (38) 40.0
 
March 17, 2019, 6 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A 6.0 μg/m3 (5) 4.5 μg/m3 (19) 37.0
 
March 17, 2019, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) 3.6 μg/m3 (15) 34.0
 
March 17, 2019, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A 7.0 μg/m3 (6) 5.9 μg/m3 (25) 28.0
 
March 17, 2019, 3 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A 5.0 μg/m3 (5) 4.7 μg/m3 (20) 31.0
 
March 17, 2019, 2 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) N/A 10.0 μg/m3 (9) 8.5 μg/m3 (35) 35.0
 
March 17, 2019, 1 p.m. 17.0 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A 17.0 ppb (13) N/A 9.0 μg/m3 (8) 7.7 μg/m3 (32) 32.0
 
March 17, 2019, noon 13.0 ppb (12) 1.0 ppb (1) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) N/A 8.0 μg/m3 (7) 6.9 μg/m3 (29) 29.0
 
March 17, 2019, 11 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 10 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) 7.6 μg/m3 (32) 32.0
 
March 17, 2019, 9 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 8.9 μg/m3 (37) 37.0
 
March 17, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A 13.0 μg/m3 (12) 10.4 μg/m3 (43) 43.0
 
March 17, 2019, 7 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 20.0 ppb (15) N/A 15.0 μg/m3 (14) 11.7 μg/m3 (49) 49.0
 
March 17, 2019, 6 a.m. 13.0 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) N/A 14.0 μg/m3 (13) 9.7 μg/m3 (40) 40.0
 
March 17, 2019, 5 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) N/A 11.0 μg/m3 (10) 6.7 μg/m3 (28) 28.0
 
March 17, 2019, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 5.4 μg/m3 (23) 25.0
 
March 17, 2019, 3 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A 24.0 μg/m3 (22) 21.5 μg/m3 (70) 70.0
 
March 17, 2019, 2 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) N/A 15.0 μg/m3 (14) 12.3 μg/m3 (51) 51.0
 
March 17, 2019, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 5.9 μg/m3 (25) 35.0
 
March 17, 2019, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 54.0 ppb (42) N/A 3.0 μg/m3 (3) 2.9 μg/m3 (12) 42.0
 
March 16, 2019, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A 3.0 μg/m3 (3) 3.3 μg/m3 (14) 42.0
 
March 16, 2019, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (42) N/A 2.0 μg/m3 (2) 2.1 μg/m3 (9) 42.0
 
March 16, 2019, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A 4.0 μg/m3 (4) 3.4 μg/m3 (14) 40.0
 
March 16, 2019, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A 4.0 μg/m3 (4) 3.5 μg/m3 (15) 39.0
 
March 16, 2019, 7 p.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 3.0 μg/m3 (3) 1.9 μg/m3 (8) 38.0
 
March 16, 2019, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A 3.0 μg/m3 (3) 3.2 μg/m3 (13) 38.0
 
March 16, 2019, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 33.0
 
March 16, 2019, 4 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A 5.0 μg/m3 (5) 4.8 μg/m3 (20) 32.0
 
March 16, 2019, 3 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 29.0
 
March 16, 2019, 2 p.m. 16.0 ppb (15) 5.0 ppb (5) N/A 12.0 ppb (11) N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 6.9 μg/m3 (29) 29.0
 
March 16, 2019, 1 p.m. 10.0 ppb (9) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 5.7 μg/m3 (24) 24.0
 
March 16, 2019, noon 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) N/A 9.0 μg/m3 (8) 6.7 μg/m3 (28) 28.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 8.0 μg/m3 (7) 6.2 μg/m3 (26) 26.0
 
March 16, 2019, 10 a.m. 15.0 ppb (14) 0.0 ppb (0) N/A 15.0 ppb (14) N/A N/A 17.0 ppb (13) N/A 7.0 μg/m3 (6) 5.4 μg/m3 (23) 23.0
 
March 16, 2019, 9 a.m. 13.0 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 5.2 μg/m3 (22) 22.0
 
March 16, 2019, 8 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 4.8 μg/m3 (20) 20.0
 
March 16, 2019, 7 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 4.6 μg/m3 (19) 22.0
 
March 16, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 27.0
 
March 16, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 3.9 μg/m3 (16) 25.0
 
March 16, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 2.2 μg/m3 (9) 26.0
 
March 16, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) 2.6 μg/m3 (11) 33.0
 
March 16, 2019, 2 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A 6.0 μg/m3 (5) 4.4 μg/m3 (18) 32.0
 
March 16, 2019, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A 2.0 μg/m3 (2) 2.3 μg/m3 (10) 33.0
 
March 16, 2019, midnight 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (18) 36.0
 
March 15, 2019, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 48.0 ppb (37) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 37.0