AQSQID: 490353013

Site Name: Herriman #3

Location: Herriman (Foothills), UT

Reporting: True, Located: True

Current AQI: 35.0

Herriman (Foothills) UT, US: 40.496408, -112.036305

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 4, 2020, 1 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
April 4, 2020, midnight 3.8 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 3.4 μg/m3 (14) 36.0
 
April 3, 2020, 11 p.m. 3.8 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 3.4 μg/m3 (14) 36.0
 
April 3, 2020, 10 p.m. 2.2 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 2.8 μg/m3 (12) 37.0
 
April 3, 2020, 9 p.m. 0.8 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 2.1 μg/m3 (9) 38.0
 
April 3, 2020, 8 p.m. 1.1 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 2.0 μg/m3 (8) 37.0
 
April 3, 2020, 7 p.m. 1.2 ppb (1) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 2.1 μg/m3 (9) 36.0
 
April 3, 2020, 6 p.m. 1.9 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
 
April 3, 2020, 5 p.m. 1.9 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 2.2 μg/m3 (9) 35.0
 
April 3, 2020, 4 p.m. 1.6 ppb (1) 0.8 ppb (1) 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
 
April 3, 2020, 3 p.m. 8.4 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
April 3, 2020, 2 p.m. 8.2 ppb (8) 2.8 ppb (3) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 2.6 μg/m3 (11) 27.0
 
April 3, 2020, 1 p.m. 6.9 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) N/A N/A 2.5 μg/m3 (10) 25.0
 
April 3, 2020, noon 10.6 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) N/A N/A 1.9 μg/m3 (8) 19.0
 
April 3, 2020, 11 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) N/A N/A 1.7 μg/m3 (7) 25.0
 
April 3, 2020, 10 a.m. 3.7 ppb (3) 0.5 ppb (0) 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
 
April 3, 2020, 9 a.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) N/A N/A 1.6 μg/m3 (7) 24.0
 
April 3, 2020, 8 a.m. 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 1.6 μg/m3 (7) 25.0
 
April 3, 2020, 7 a.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) N/A N/A 1.8 μg/m3 (8) 26.0
 
April 3, 2020, 6 a.m. 3.7 ppb (3) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) N/A N/A 2.1 μg/m3 (9) 26.0
 
April 3, 2020, 5 a.m. 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A N/A 2.1 μg/m3 (9) 26.0
 
April 3, 2020, 4 a.m. 3.2 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A N/A 2.2 μg/m3 (9) 25.0
 
April 3, 2020, 3 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) N/A N/A 3.0 μg/m3 (12) 25.0
 
April 3, 2020, 2 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 3.4 μg/m3 (14) 28.0
 
April 3, 2020, 1 a.m. 1.6 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 2.9 μg/m3 (12) 32.0
 
April 3, 2020, midnight 2.2 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 2.8 μg/m3 (12) 34.0
 
April 2, 2020, 11 p.m. 2.0 ppb (2) 0.9 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
 
April 2, 2020, 10 p.m. 2.5 ppb (2) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 2.7 μg/m3 (11) 34.0
 
April 2, 2020, 9 p.m. 2.3 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 2.8 μg/m3 (12) 34.0
 
April 2, 2020, 8 p.m. 1.8 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 3.6 μg/m3 (15) 34.0
 
April 2, 2020, 7 p.m. 1.7 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
April 2, 2020, 6 p.m. 2.5 ppb (2) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 3.1 μg/m3 (13) 35.0
 
April 2, 2020, 5 p.m. 3.2 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 4.8 μg/m3 (20) 31.0
 
April 2, 2020, 4 p.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A N/A 5.4 μg/m3 (23) 25.0
 
April 2, 2020, 3 p.m. 3.3 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 5.2 μg/m3 (22) 28.0
 
April 2, 2020, 2 p.m. 4.1 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) N/A N/A 6.3 μg/m3 (26) 26.0
 
April 2, 2020, 1 p.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 4.5 μg/m3 (19) 31.0
 
April 2, 2020, noon 3.9 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) N/A N/A 2.8 μg/m3 (12) 32.0
 
April 2, 2020, 11 a.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
April 2, 2020, 10 a.m. 1.8 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 1.9 μg/m3 (8) 35.0
 
April 2, 2020, 9 a.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 1.7 μg/m3 (7) 38.0
 
April 2, 2020, 8 a.m. 1.8 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 1.7 μg/m3 (7) 38.0
 
April 2, 2020, 7 a.m. 1.6 ppb (1) 0.4 ppb (0) 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
 
April 2, 2020, 6 a.m. 1.7 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) N/A N/A 1.3 μg/m3 (5) 37.0
 
April 2, 2020, 5 a.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 1.0 μg/m3 (4) 36.0
 
April 2, 2020, 4 a.m. 1.3 ppb (1) 0.4 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
 
April 2, 2020, 3 a.m. 1.5 ppb (1) 0.5 ppb (0) 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
 
April 2, 2020, 2 a.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 1.6 μg/m3 (7) 32.0
 
April 2, 2020, 1 a.m. 1.2 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 2.2 μg/m3 (9) 33.0
 
April 2, 2020, midnight 1.9 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
April 1, 2020, 11 p.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) N/A N/A 4.7 μg/m3 (20) 33.0
 
April 1, 2020, 10 p.m. 4.5 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 5.6 μg/m3 (23) 35.0
 
April 1, 2020, 9 p.m. 4.4 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 5.8 μg/m3 (24) 35.0
 
April 1, 2020, 8 p.m. 4.3 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 5.8 μg/m3 (24) 34.0
 
April 1, 2020, 7 p.m. 5.1 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 5.6 μg/m3 (23) 32.0
 
April 1, 2020, 6 p.m. 4.3 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A N/A 4.7 μg/m3 (20) 30.0
 
April 1, 2020, 5 p.m. 3.4 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 3.4 μg/m3 (14) 30.0
 
April 1, 2020, 4 p.m. 3.1 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 2.4 μg/m3 (10) 29.0
 
April 1, 2020, 3 p.m. 1.9 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) N/A N/A 1.3 μg/m3 (5) 29.0
 
April 1, 2020, 2 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
April 1, 2020, 1 p.m. 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) N/A N/A 1.1 μg/m3 (5) 24.0
 
April 1, 2020, noon 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A N/A 0.5 μg/m3 (2) 27.0
 
April 1, 2020, 11 a.m. 1.4 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) N/A N/A 1.4 μg/m3 (6) 26.0
 
April 1, 2020, 10 a.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) N/A N/A 1.2 μg/m3 (5) 26.0
 
April 1, 2020, 9 a.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) N/A N/A 1.8 μg/m3 (8) 27.0
 
April 1, 2020, 8 a.m. 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 2.4 μg/m3 (10) 30.0
 
April 1, 2020, 7 a.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 2.9 μg/m3 (12) 32.0
 
April 1, 2020, 6 a.m. 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 3.7 μg/m3 (15) 32.0
 
April 1, 2020, 5 a.m. 0.4 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 2.0 μg/m3 (8) 36.0
 
April 1, 2020, 4 a.m. 0.3 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 48.0 ppb (37) N/A N/A 1.9 μg/m3 (8) 37.0
 
April 1, 2020, 3 a.m. 0.9 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
April 1, 2020, 2 a.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 2.7 μg/m3 (11) 32.0
 
April 1, 2020, 1 a.m. 0.5 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
April 1, 2020, midnight 0.4 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 50.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
March 31, 2020, 11 p.m. 0.4 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 50.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
March 31, 2020, 10 p.m. 0.5 ppb (0) 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A 50.0 ppb (38) N/A N/A 2.4 μg/m3 (10) 38.0
 
March 31, 2020, 9 p.m. 0.6 ppb (1) 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 2.4 μg/m3 (10) 38.0
 
March 31, 2020, 8 p.m. 0.5 ppb (0) 0.5 ppb (0) N/A 0.0 ppb (0) N/A N/A 48.0 ppb (37) N/A N/A 2.4 μg/m3 (10) 37.0
 
March 31, 2020, 7 p.m. 0.4 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
March 31, 2020, 6 p.m. 0.5 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 2.4 μg/m3 (10) 38.0
 
March 31, 2020, 5 p.m. 6.0 ppb (6) 3.6 ppb (3) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 2.4 μg/m3 (10) 36.0
 
March 31, 2020, 4 p.m. 73.0 ppb (70) 44.1 ppb (41) N/A 29.0 ppb (27) N/A N/A 40.0 ppb (31) N/A N/A 3.2 μg/m3 (13) 70.0
 
March 31, 2020, 3 p.m. 53.3 ppb (49) 33.7 ppb (31) N/A 20.0 ppb (19) N/A N/A 39.0 ppb (30) N/A N/A 2.6 μg/m3 (11) 49.0
 
March 31, 2020, 2 p.m. 2.3 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 2.0 μg/m3 (8) 30.0
 
March 31, 2020, 1 p.m. 3.4 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 2.1 μg/m3 (9) 28.0
 
March 31, 2020, noon 1.6 ppb (1) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 1.8 μg/m3 (8) 31.0
 
March 31, 2020, 11 a.m. 0.6 ppb (1) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 42.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
March 31, 2020, 10 a.m. 0.5 ppb (0) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 43.0 ppb (33) N/A N/A 2.0 μg/m3 (8) 33.0
 
March 31, 2020, 9 a.m. 0.6 ppb (1) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 2.3 μg/m3 (10) 34.0
 
March 31, 2020, 8 a.m. 0.7 ppb (1) 0.4 ppb (0) 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
 
March 31, 2020, 7 a.m. 0.7 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 2.4 μg/m3 (10) 36.0
 
March 31, 2020, 6 a.m. 0.7 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 2.4 μg/m3 (10) 36.0
 
March 31, 2020, 5 a.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
March 31, 2020, 4 a.m. 0.9 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 2.2 μg/m3 (9) 35.0
 
March 31, 2020, 3 a.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 1.8 μg/m3 (8) 34.0
 
March 31, 2020, 2 a.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 1.6 μg/m3 (7) 34.0
 
March 31, 2020, 1 a.m. 1.2 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 1.6 μg/m3 (7) 35.0
 
March 31, 2020, midnight 1.4 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 1.7 μg/m3 (7) 35.0
 
March 30, 2020, 11 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 3.2 μg/m3 (13) 35.0
 
March 30, 2020, 10 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 3.1 μg/m3 (13) 35.0
 
March 30, 2020, 9 p.m. 3.2 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
March 30, 2020, 8 p.m. 3.8 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 3.2 μg/m3 (13) 34.0
 
March 30, 2020, 7 p.m. 4.0 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 30, 2020, 6 p.m. 4.8 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 3.4 μg/m3 (14) 31.0
 
March 30, 2020, 5 p.m. 6.6 ppb (6) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) N/A N/A 3.7 μg/m3 (15) 28.0
 
March 30, 2020, 4 p.m. 5.9 ppb (5) 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) N/A N/A 3.7 μg/m3 (15) 27.0
 
March 30, 2020, 3 p.m. 4.0 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 2.8 μg/m3 (12) 28.0
 
March 30, 2020, 2 p.m. 9.9 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) N/A N/A 4.3 μg/m3 (18) 18.0
 
March 30, 2020, 1 p.m. 10.4 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 20.0 ppb (15) N/A N/A 3.4 μg/m3 (14) 15.0
 
March 30, 2020, noon 10.0 ppb (9) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) N/A N/A 2.5 μg/m3 (10) 18.0
 
March 30, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 2.3 μg/m3 (10) 23.0
 
March 30, 2020, 10 a.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A N/A 2.2 μg/m3 (9) 25.0
 
March 30, 2020, 9 a.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A N/A 2.7 μg/m3 (11) 27.0
 
March 30, 2020, 8 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 2.4 μg/m3 (10) 29.0
 
March 30, 2020, 7 a.m. 2.7 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A N/A 2.9 μg/m3 (12) 26.0
 
March 30, 2020, 6 a.m. 2.7 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) N/A N/A 2.8 μg/m3 (12) 24.0
 
March 30, 2020, 5 a.m. 2.7 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) N/A N/A 3.1 μg/m3 (13) 22.0
 
March 30, 2020, 4 a.m. 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A N/A 3.4 μg/m3 (14) 20.0
 
March 30, 2020, 3 a.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 3.4 μg/m3 (14) 28.0
 
March 30, 2020, 2 a.m. 1.8 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 3.4 μg/m3 (14) 33.0
 
March 30, 2020, 1 a.m. 1.4 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 3.4 μg/m3 (14) 35.0
 
March 30, 2020, midnight 1.0 ppb (1) 0.4 ppb (0) 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
 
March 29, 2020, 11 p.m. 0.8 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 2.8 μg/m3 (12) 35.0
 
March 29, 2020, 10 p.m. 0.9 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
March 29, 2020, 9 p.m. 0.7 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 3.9 μg/m3 (16) 35.0
 
March 29, 2020, 8 p.m. 0.6 ppb (1) 0.4 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 3.6 μg/m3 (15) 36.0
 
March 29, 2020, 7 p.m. 0.8 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 3.9 μg/m3 (16) 35.0
 
March 29, 2020, 6 p.m. 0.7 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) N/A N/A 3.9 μg/m3 (16) 35.0
 
March 29, 2020, 5 p.m. 1.1 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 3.8 μg/m3 (16) 34.0
 
March 29, 2020, 4 p.m. 1.3 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 3.8 μg/m3 (16) 33.0
 
March 29, 2020, 3 p.m. 1.0 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 3.0 μg/m3 (12) 33.0
 
March 29, 2020, 2 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 4.6 μg/m3 (19) 30.0
 
March 29, 2020, 1 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 4.6 μg/m3 (19) 28.0
 
March 29, 2020, noon 2.1 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 4.6 μg/m3 (19) 29.0
 
March 29, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.5 μg/m3 (19) 30.0
 
March 29, 2020, 10 a.m. 3.6 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A N/A 3.7 μg/m3 (15) 27.0
 
March 29, 2020, 9 a.m. 4.6 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 29, 2020, 8 a.m. 3.8 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 29, 2020, 7 a.m. 3.2 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A N/A 5.0 μg/m3 (21) 28.0
 
March 29, 2020, 6 a.m. 1.6 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 32.0
 
March 29, 2020, 5 a.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 4.6 μg/m3 (19) 28.0
 
March 29, 2020, 4 a.m. 2.8 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A N/A 4.2 μg/m3 (18) 31.0
 
March 29, 2020, 3 a.m. 4.8 ppb (4) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) N/A N/A 4.2 μg/m3 (18) 28.0
 
March 29, 2020, 2 a.m. 5.5 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) N/A N/A 5.6 μg/m3 (23) 26.0
 
March 29, 2020, 1 a.m. 4.6 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A N/A 5.4 μg/m3 (23) 31.0
 
March 29, 2020, midnight 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 5.3 μg/m3 (22) 34.0
 
March 28, 2020, 11 p.m. 2.8 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 6.9 μg/m3 (29) 36.0
 
March 28, 2020, 10 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 8.5 μg/m3 (35) 36.0
 
March 28, 2020, 9 p.m. 2.6 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 7.9 μg/m3 (33) 35.0
 
March 28, 2020, 8 p.m. 2.4 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 6.7 μg/m3 (28) 35.0
 
March 28, 2020, 7 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) N/A N/A 7.4 μg/m3 (31) 35.0
 
March 28, 2020, 6 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 28, 2020, 5 p.m. 2.7 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 28, 2020, 4 p.m. 3.2 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 5.7 μg/m3 (24) 35.0
 
March 28, 2020, 3 p.m. 6.0 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) N/A N/A 6.7 μg/m3 (28) 32.0
 
March 28, 2020, 2 p.m. 12.6 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A N/A 28.0 ppb (22) N/A N/A 7.4 μg/m3 (31) 31.0
 
March 28, 2020, 1 p.m. 9.6 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 28, 2020, noon 8.5 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 30.0 ppb (23) N/A N/A 7.5 μg/m3 (31) 31.0
 
March 28, 2020, 11 a.m. 7.5 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A N/A N/A N/A 7.1 μg/m3 (30) 30.0
 
March 28, 2020, 10 a.m. 6.7 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 4.7 μg/m3 (20) 26.0
 
March 28, 2020, 9 a.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A N/A 3.9 μg/m3 (16) 31.0
 
March 28, 2020, 8 a.m. 3.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
March 28, 2020, 7 a.m. 3.7 ppb (3) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) N/A N/A 3.8 μg/m3 (16) 30.0
 
March 28, 2020, 6 a.m. 3.2 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 3.4 μg/m3 (14) 32.0
 
March 28, 2020, 5 a.m. 1.6 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 3.2 μg/m3 (13) 33.0
 
March 28, 2020, 4 a.m. 2.8 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) N/A N/A 3.2 μg/m3 (13) 32.0
 
March 28, 2020, 3 a.m. 3.8 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) N/A N/A 3.7 μg/m3 (15) 30.0
 
March 28, 2020, 2 a.m. 2.8 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 2.8 μg/m3 (12) 32.0