AQSQID: 490030003

Site Name: Brigham City

Location: Brigham City, UT

Reporting: True, Located: True

Current AQI: 46.0

Brigham City UT, US: 41.492802, -112.0187

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 27, 2019, midnight 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 60.0 ppb (46) N/A N/A 3.1 μg/m3 (13) 46.0
 
May 26, 2019, 11 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 60.0 ppb (46) N/A N/A 4.1 μg/m3 (17) 46.0
 
May 26, 2019, 10 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 N/A 2.9 μg/m3 (12) 47.0
 
May 26, 2019, 9 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 N/A 2.8 μg/m3 (12) 47.0
 
May 26, 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 2.6 μg/m3 (11) 46.0
 
May 26, 2019, 7 p.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 2.4 μg/m3 (10) 44.0
 
May 26, 2019, 6 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 2.3 μg/m3 (10) 37.0
 
May 26, 2019, 5 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A N/A 3.2 μg/m3 (13) 29.0
 
May 26, 2019, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A N/A 3.0 μg/m3 (12) 27.0
 
May 26, 2019, 3 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) N/A N/A 3.3 μg/m3 (14) 23.0
 
May 26, 2019, 2 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) N/A N/A 3.7 μg/m3 (15) 19.0
 
May 26, 2019, 1 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) N/A N/A 4.0 μg/m3 (17) 18.0
 
May 26, 2019, noon 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) N/A N/A 4.1 μg/m3 (17) 20.0
 
May 26, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.6 μg/m3 (15) 25.0
 
May 26, 2019, 10 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 2.7 μg/m3 (11) 33.0
 
May 26, 2019, 9 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 2.1 μg/m3 (9) 35.0
 
May 26, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.3 μg/m3 (10) 10.0
 
May 26, 2019, 7 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 2.6 μg/m3 (11) 32.0
 
May 26, 2019, 6 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
May 26, 2019, 5 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 2.5 μg/m3 (10) 35.0
 
May 26, 2019, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 3.6 μg/m3 (15) 34.0
 
May 26, 2019, 3 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) N/A N/A 4.0 μg/m3 (17) 32.0
 
May 26, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 3.5 μg/m3 (15) 34.0
 
May 26, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 3.2 μg/m3 (13) 35.0
 
May 26, 2019, midnight 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 3.4 μg/m3 (14) 35.0
 
May 25, 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 3.2 μg/m3 (13) 38.0
 
May 25, 2019, 10 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 N/A 2.6 μg/m3 (11) 41.0
 
May 25, 2019, 9 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 2.7 μg/m3 (11) 38.0
 
May 25, 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 N/A 2.8 μg/m3 (12) 38.0
 
May 25, 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 N/A 2.3 μg/m3 (10) 36.0
 
May 25, 2019, 6 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 N/A 2.3 μg/m3 (10) 35.0
 
May 25, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 3.8 μg/m3 (16) 32.0
 
May 25, 2019, 4 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 4.6 μg/m3 (19) 28.0
 
May 25, 2019, 3 p.m. 11.0 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 25, 2019, 2 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A 16.0 ppb (12) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 25, 2019, 1 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (18) N/A N/A 6.5 μg/m3 (27) 27.0
 
May 25, 2019, noon 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) N/A N/A 5.5 μg/m3 (23) 23.0
 
May 25, 2019, 11 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 4.7 μg/m3 (20) 20.0
 
May 25, 2019, 10 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 3.2 μg/m3 (13) 25.0
 
May 25, 2019, 9 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) N/A N/A 3.9 μg/m3 (16) 18.0
 
May 25, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.7 μg/m3 (15) 15.0
 
May 25, 2019, 7 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 3.5 μg/m3 (15) 28.0
 
May 25, 2019, 6 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A N/A 3.8 μg/m3 (16) 29.0
 
May 25, 2019, 5 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
May 25, 2019, 4 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) N/A N/A 4.7 μg/m3 (20) 33.0
 
May 25, 2019, 3 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) N/A N/A 5.1 μg/m3 (21) 27.0
 
May 25, 2019, 2 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 4.3 μg/m3 (18) 32.0
 
May 25, 2019, 1 a.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 3.7 μg/m3 (15) 37.0
 
May 25, 2019, midnight 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 4.2 μg/m3 (18) 34.0
 
May 24, 2019, 11 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 N/A 4.2 μg/m3 (18) 33.0
 
May 24, 2019, 10 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 N/A 4.0 μg/m3 (17) 34.0
 
May 24, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 3.6 μg/m3 (15) 36.0
 
May 24, 2019, 8 p.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 3.0 μg/m3 (12) 35.0
 
May 24, 2019, 7 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 2.5 μg/m3 (10) 38.0
 
May 24, 2019, 6 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 2.5 μg/m3 (10) 37.0
 
May 24, 2019, 5 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 2.0 μg/m3 (8) 37.0
 
May 24, 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 N/A 1.5 μg/m3 (6) 37.0
 
May 24, 2019, 3 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 2.4 μg/m3 (10) 34.0
 
May 24, 2019, 2 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) N/A N/A 2.1 μg/m3 (9) 31.0
 
May 24, 2019, 1 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) N/A N/A 2.2 μg/m3 (9) 32.0
 
May 24, 2019, noon 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 1.2 μg/m3 (5) 34.0
 
May 24, 2019, 11 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 0.7 μg/m3 (3) 36.0
 
May 24, 2019, 10 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 0.9 μg/m3 (4) 38.0
 
May 24, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 0.8 μg/m3 (3) 37.0
 
May 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
May 24, 2019, 7 a.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 N/A 0.8 μg/m3 (3) 40.0
 
May 24, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 0.4 μg/m3 (2) 44.0
 
May 24, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 0.8 μg/m3 (3) 42.0
 
May 24, 2019, 4 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 0.6 μg/m3 (2) 44.0
 
May 24, 2019, 3 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (44) N/A N/A 1.0 μg/m3 (4) 44.0
 
May 24, 2019, 2 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 52.0 ppb (40) N/A N/A 2.9 μg/m3 (12) 40.0
 
May 24, 2019, 1 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) N/A N/A 2.4 μg/m3 (10) 43.0
 
May 24, 2019, midnight 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) N/A N/A 2.4 μg/m3 (10) 42.0
 
May 23, 2019, 11 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) N/A N/A 3.0 μg/m3 (12) 43.0
 
May 23, 2019, 10 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
May 23, 2019, 9 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 1.2 μg/m3 (5) 36.0
 
May 23, 2019, 8 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 1.5 μg/m3 (6) 35.0
 
May 23, 2019, 7 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 1.0 μg/m3 (4) 35.0
 
May 23, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 0.9 μg/m3 (4) 35.0
 
May 23, 2019, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 1.0 μg/m3 (4) 35.0
 
May 23, 2019, 4 p.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 1.0 μg/m3 (4) 35.0
 
May 23, 2019, 3 p.m. 3.0 ppb (3) 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
 
May 23, 2019, 2 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 0.8 μg/m3 (3) 35.0
 
May 23, 2019, 1 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.1 μg/m3 (5) 35.0
 
May 23, 2019, noon 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 1.4 μg/m3 (6) 35.0
 
May 23, 2019, 11 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (35) N/A N/A 1.2 μg/m3 (5) 35.0
 
May 23, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.1 μg/m3 (5) 35.0
 
May 23, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
May 23, 2019, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
May 23, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A N/A N/A 2.2 μg/m3 (9) 9.0
 
May 23, 2019, 5 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
May 23, 2019, 4 a.m. 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.7 μg/m3 (7) 7.0
 
May 23, 2019, 3 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
May 23, 2019, 2 a.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 N/A 1.5 μg/m3 (6) 33.0
 
May 23, 2019, 1 a.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 N/A 1.1 μg/m3 (5) 33.0
 
May 23, 2019, midnight 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 0.8 μg/m3 (3) 32.0
 
May 22, 2019, 11 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
May 22, 2019, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
May 22, 2019, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 1.0 μg/m3 (4) 32.0
 
May 22, 2019, 8 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 0.9 μg/m3 (4) 31.0
 
May 22, 2019, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 1.4 μg/m3 (6) 30.0
 
May 22, 2019, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 2.9 μg/m3 (12) 31.0
 
May 22, 2019, 5 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 4.1 μg/m3 (17) 31.0
 
May 22, 2019, 4 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) N/A N/A 3.5 μg/m3 (15) 29.0
 
May 22, 2019, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 1.8 μg/m3 (8) 31.0
 
May 22, 2019, 2 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 0.8 μg/m3 (3) 31.0
 
May 22, 2019, 1 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A N/A 1.2 μg/m3 (5) 28.0
 
May 22, 2019, noon 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 1.6 μg/m3 (7) 25.0
 
May 22, 2019, 11 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) N/A N/A 4.6 μg/m3 (19) 25.0
 
May 22, 2019, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A N/A 3.1 μg/m3 (13) 29.0
 
May 22, 2019, 9 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 3.1 μg/m3 (13) 30.0
 
May 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.9 μg/m3 (12) 12.0
 
May 22, 2019, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 2.1 μg/m3 (9) 35.0
 
May 22, 2019, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.9 μg/m3 (8) 35.0
 
May 22, 2019, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 1.3 μg/m3 (5) 34.0
 
May 22, 2019, 4 a.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 N/A 1.0 μg/m3 (4) 32.0
 
May 22, 2019, 3 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A N/A 1.3 μg/m3 (5) 29.0
 
May 22, 2019, 2 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 1.4 μg/m3 (6) 25.0
 
May 22, 2019, 1 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 0.8 μg/m3 (3) 29.0
 
May 22, 2019, midnight 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 0.7 μg/m3 (3) 32.0
 
May 21, 2019, 11 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 0.8 μg/m3 (3) 30.0
 
May 21, 2019, 10 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
May 21, 2019, 9 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 0.6 μg/m3 (2) 29.0
 
May 21, 2019, 8 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 N/A 0.5 μg/m3 (2) 31.0
 
May 21, 2019, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 1.0 μg/m3 (4) 30.0
 
May 21, 2019, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 1.2 μg/m3 (5) 30.0
 
May 21, 2019, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 1.8 μg/m3 (8) 31.0
 
May 21, 2019, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 0.9 μg/m3 (4) 32.0
 
May 21, 2019, 3 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 0.9 μg/m3 (4) 30.0
 
May 21, 2019, 2 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 1.9 μg/m3 (8) 27.0
 
May 21, 2019, 1 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 N/A 1.6 μg/m3 (7) 25.0
 
May 21, 2019, noon 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 1.1 μg/m3 (5) 25.0
 
May 21, 2019, 11 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 1.4 μg/m3 (6) 28.0
 
May 21, 2019, 10 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 N/A 0.6 μg/m3 (2) 29.0
 
May 21, 2019, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 0.8 μg/m3 (3) 28.0
 
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
May 21, 2019, 7 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) N/A N/A 1.5 μg/m3 (6) 24.0
 
May 21, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) N/A N/A 1.3 μg/m3 (5) 25.0
 
May 21, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A N/A 1.2 μg/m3 (5) 29.0
 
May 21, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 1.3 μg/m3 (5) 32.0
 
May 21, 2019, 3 a.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 N/A 0.9 μg/m3 (4) 32.0
 
May 21, 2019, 2 a.m. 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 0.7 μg/m3 (3) 33.0
 
May 21, 2019, 1 a.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 N/A 0.8 μg/m3 (3) 33.0
 
May 21, 2019, midnight 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 0.7 μg/m3 (3) 36.0
 
May 20, 2019, 11 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 0.7 μg/m3 (3) 36.0
 
May 20, 2019, 10 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 0.5 μg/m3 (2) 37.0
 
May 20, 2019, 9 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 0.4 μg/m3 (2) 37.0
 
May 20, 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 N/A 0.9 μg/m3 (4) 38.0
 
May 20, 2019, 7 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 4.1 μg/m3 (17) 33.0
 
May 20, 2019, 6 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 7.4 μg/m3 (31) 31.0
 
May 20, 2019, 5 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 20, 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 N/A 2.1 μg/m3 (9) 37.0
 
May 20, 2019, 3 p.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 2.3 μg/m3 (10) 38.0
 
May 20, 2019, 2 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 3.1 μg/m3 (13) 36.0
 
May 20, 2019, 1 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 1.8 μg/m3 (8) 35.0
 
May 20, 2019, noon 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 1.2 μg/m3 (5) 37.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 1.7 μg/m3 (7) 35.0
 
May 20, 2019, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 1.8 μg/m3 (8) 36.0
 
May 20, 2019, 9 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 N/A 1.7 μg/m3 (7) 37.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
May 20, 2019, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 1.4 μg/m3 (6) 44.0
 
May 20, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) 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
 
May 20, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 56.0 ppb (43) N/A N/A 1.6 μg/m3 (7) 43.0
 
May 20, 2019, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 1.6 μg/m3 (7) 42.0
 
May 20, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) N/A N/A 1.1 μg/m3 (5) 42.0
 
May 20, 2019, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 57.0 ppb (44) N/A N/A 1.4 μg/m3 (6) 44.0
 
May 20, 2019, 1 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (41) N/A N/A 3.3 μg/m3 (14) 41.0