ID: 2157

AQSQID: 490130002

Site Name: Roosvelt

Added: April 21, 2020, 6:24 p.m.

Updated: April 22, 2021, 10:44 a.m.

Location: Roosevelt (W 200 S), UT

Reporting: True, Located: True

Current AQI: 24.0

Roosevelt (W 200 S) UT, US: 40.2943, -110.009

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 22, 2021, 9 a.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 3.1 μg/m3 (13) 24.0
 
April 22, 2021, 8 a.m. 2.6 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 2.7 μg/m3 (12) 32.0
 
April 22, 2021, 7 a.m. 2.2 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
April 22, 2021, 6 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 3.4 μg/m3 (15) 42.0
 
April 22, 2021, 5 a.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A 2.9 μg/m3 (13) 41.0
 
April 22, 2021, 4 a.m. 2.4 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 3.1 μg/m3 (13) 41.0
 
April 22, 2021, 3 a.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 4.4 μg/m3 (19) 43.0
 
April 22, 2021, 2 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 3.3 μg/m3 (14) 42.0
 
April 22, 2021, 1 a.m. 1.7 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 3.1 μg/m3 (13) 45.0
 
April 22, 2021, midnight 1.6 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 2.9 μg/m3 (13) 47.0
 
April 21, 2021, 11 p.m. 1.6 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.6 μg/m3 (11) 46.0
 
April 21, 2021, 10 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 2.5 μg/m3 (11) 47.0
 
April 21, 2021, 9 p.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.4 μg/m3 (10) 46.0
 
April 21, 2021, 8 p.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 2.5 μg/m3 (11) 44.0
 
April 21, 2021, 7 p.m. 2.6 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 2.8 μg/m3 (12) 42.0
 
April 21, 2021, 6 p.m. 2.7 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 3.0 μg/m3 (13) 41.0
 
April 21, 2021, 5 p.m. 2.4 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 2.9 μg/m3 (13) 39.0
 
April 21, 2021, 4 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
April 21, 2021, 3 p.m. 2.7 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
April 21, 2021, 2 p.m. 3.4 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) N/A N/A 3.2 μg/m3 (14) 35.0
 
April 21, 2021, 1 p.m. 5.0 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) N/A N/A 3.1 μg/m3 (13) 33.0
 
April 21, 2021, noon 4.4 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
April 21, 2021, 11 a.m. 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) N/A N/A 2.8 μg/m3 (12) 32.0
 
April 21, 2021, 10 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 2.9 μg/m3 (13) 29.0
 
April 21, 2021, 9 a.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 2.8 μg/m3 (12) 30.0
 
April 21, 2021, 8 a.m. 4.1 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
April 21, 2021, 7 a.m. 5.1 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (30) N/A N/A 3.4 μg/m3 (15) 30.0
 
April 21, 2021, 6 a.m. 4.4 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
April 21, 2021, 5 a.m. 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 2.6 μg/m3 (11) 31.0
 
April 21, 2021, 4 a.m. 3.1 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) N/A N/A 2.6 μg/m3 (11) 36.0
 
April 21, 2021, 3 a.m. 5.4 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (39) N/A N/A 2.9 μg/m3 (13) 39.0
 
April 21, 2021, 2 a.m. 3.4 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (44) N/A N/A 2.7 μg/m3 (12) 44.0
 
April 21, 2021, 1 a.m. 1.5 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (49) N/A N/A 2.7 μg/m3 (12) 49.0
 
April 21, 2021, midnight 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.3 μg/m3 (10) 46.0
 
April 20, 2021, 11 p.m. 1.6 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.4 μg/m3 (10) 46.0
 
April 20, 2021, 10 p.m. 1.6 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 2.6 μg/m3 (11) 47.0
 
April 20, 2021, 9 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 2.6 μg/m3 (11) 47.0
 
April 20, 2021, 8 p.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 2.5 μg/m3 (11) 46.0
 
April 20, 2021, 7 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 2.2 μg/m3 (10) 44.0
 
April 20, 2021, 6 p.m. 1.3 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
April 20, 2021, 5 p.m. 1.3 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) N/A N/A 1.8 μg/m3 (8) 40.0
 
April 20, 2021, 4 p.m. 1.5 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 1.7 μg/m3 (8) 39.0
 
April 20, 2021, 3 p.m. 1.4 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 1.6 μg/m3 (7) 39.0
 
April 20, 2021, 2 p.m. 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 1.4 μg/m3 (6) 39.0
 
April 20, 2021, 1 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 1.5 μg/m3 (7) 38.0
 
April 20, 2021, noon 1.8 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 1.4 μg/m3 (6) 38.0
 
April 20, 2021, 11 a.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 1.3 μg/m3 (6) 34.0
 
April 20, 2021, 10 a.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 1.3 μg/m3 (6) 29.0
 
April 20, 2021, 9 a.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (29) N/A N/A 1.1 μg/m3 (5) 29.0
 
April 20, 2021, 8 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) N/A N/A 1.1 μg/m3 (5) 34.0
 
April 20, 2021, 7 a.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A 1.2 μg/m3 (5) 36.0
 
April 20, 2021, 6 a.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A 1.2 μg/m3 (5) 36.0
 
April 20, 2021, 5 a.m. 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A 1.3 μg/m3 (6) 36.0
 
April 20, 2021, 4 a.m. 1.3 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
April 20, 2021, 3 a.m. 1.8 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 3.1 μg/m3 (13) 34.0
 
April 20, 2021, 2 a.m. 3.8 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) N/A N/A 1.7 μg/m3 (8) 39.0
 
April 20, 2021, 1 a.m. 1.9 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) N/A N/A 1.8 μg/m3 (8) 40.0
 
April 20, 2021, midnight 1.4 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 3.3 μg/m3 (14) 42.0
 
April 19, 2021, 11 p.m. 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) N/A N/A 3.0 μg/m3 (13) 43.0
 
April 19, 2021, 10 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 4.0 μg/m3 (17) 47.0
 
April 19, 2021, 9 p.m. 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 54.0 ppb (50) N/A N/A 4.2 μg/m3 (18) 50.0
 
April 19, 2021, 8 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (51) N/A N/A 5.4 μg/m3 (23) 51.0
 
April 19, 2021, 7 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (49) N/A N/A 4.9 μg/m3 (21) 49.0
 
April 19, 2021, 6 p.m. 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 6.0 μg/m3 (25) 47.0
 
April 19, 2021, 5 p.m. 2.5 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 5.4 μg/m3 (23) 43.0
 
April 19, 2021, 4 p.m. 5.1 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) N/A N/A 5.7 μg/m3 (24) 36.0
 
April 19, 2021, 3 p.m. 6.3 ppb (6) 2.5 ppb (3) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) N/A N/A 5.9 μg/m3 (25) 31.0
 
April 19, 2021, 2 p.m. 6.1 ppb (6) 2.3 ppb (3) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (26) N/A N/A 5.3 μg/m3 (23) 26.0
 
April 19, 2021, 1 p.m. 9.1 ppb (9) 2.5 ppb (3) N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) N/A N/A 5.0 μg/m3 (21) 23.0
 
April 19, 2021, noon 9.5 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) N/A N/A 5.3 μg/m3 (23) 25.0
 
April 19, 2021, 11 a.m. 5.5 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
April 19, 2021, 10 a.m. 3.3 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) N/A N/A 4.3 μg/m3 (18) 32.0
 
April 19, 2021, 9 a.m. 3.3 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 4.3 μg/m3 (18) 33.0
 
April 19, 2021, 8 a.m. 3.3 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) N/A N/A 3.9 μg/m3 (17) 35.0
 
April 19, 2021, 7 a.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 3.7 μg/m3 (16) 33.0
 
April 19, 2021, 6 a.m. 2.7 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 3.3 μg/m3 (14) 33.0
 
April 19, 2021, 5 a.m. 2.8 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 3.0 μg/m3 (13) 27.0
 
April 19, 2021, 4 a.m. 3.8 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 32.0
 
April 19, 2021, 3 a.m. 4.3 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) N/A N/A 2.9 μg/m3 (13) 34.0
 
April 19, 2021, 2 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) N/A N/A 2.4 μg/m3 (10) 38.0
 
April 19, 2021, 1 a.m. 1.8 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 2.3 μg/m3 (10) 41.0
 
April 19, 2021, midnight 1.1 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 2.3 μg/m3 (10) 45.0
 
April 18, 2021, 11 p.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 2.5 μg/m3 (11) 45.0
 
April 18, 2021, 10 p.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 2.8 μg/m3 (12) 45.0
 
April 18, 2021, 9 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 2.7 μg/m3 (12) 45.0
 
April 18, 2021, 8 p.m. 1.0 ppb (1) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 2.9 μg/m3 (13) 45.0
 
April 18, 2021, 7 p.m. 1.3 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 3.7 μg/m3 (16) 47.0
 
April 18, 2021, 6 p.m. 1.6 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 4.3 μg/m3 (18) 45.0
 
April 18, 2021, 5 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 4.5 μg/m3 (19) 42.0
 
April 18, 2021, 4 p.m. 3.2 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 5.3 μg/m3 (23) 38.0
 
April 18, 2021, 3 p.m. 6.7 ppb (7) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (31) N/A N/A 6.6 μg/m3 (28) 31.0
 
April 18, 2021, 2 p.m. 6.7 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) N/A N/A 6.4 μg/m3 (27) 27.0
 
April 18, 2021, 1 p.m. 5.0 ppb (5) 1.5 ppb (2) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) N/A N/A 5.9 μg/m3 (25) 25.0
 
April 18, 2021, noon 6.4 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) N/A N/A 5.8 μg/m3 (25) 25.0
 
April 18, 2021, 11 a.m. 6.6 ppb (7) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (19) N/A N/A 5.9 μg/m3 (25) 25.0
 
April 18, 2021, 10 a.m. 3.9 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (24) N/A N/A 5.1 μg/m3 (22) 24.0
 
April 18, 2021, 9 a.m. 3.3 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (19) N/A N/A 3.5 μg/m3 (15) 19.0
 
April 18, 2021, 8 a.m. 3.6 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (23) N/A N/A 3.2 μg/m3 (14) 23.0
 
April 18, 2021, 7 a.m. 3.3 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) N/A N/A 3.5 μg/m3 (15) 25.0
 
April 18, 2021, 6 a.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) N/A N/A 2.8 μg/m3 (12) 31.0
 
April 18, 2021, 5 a.m. 2.9 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 2.6 μg/m3 (11) 38.0
 
April 18, 2021, 4 a.m. 2.7 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) N/A N/A 3.0 μg/m3 (13) 39.0
 
April 18, 2021, 3 a.m. 2.7 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 2.7 μg/m3 (12) 41.0
 
April 18, 2021, 2 a.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 2.5 μg/m3 (11) 44.0
 
April 18, 2021, 1 a.m. 2.0 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 2.1 μg/m3 (9) 44.0
 
April 18, 2021, midnight 1.2 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 1.8 μg/m3 (8) 45.0
 
April 17, 2021, 11 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 1.7 μg/m3 (8) 44.0
 
April 17, 2021, 10 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 1.7 μg/m3 (8) 46.0
 
April 17, 2021, 9 p.m. 1.1 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) N/A N/A 1.7 μg/m3 (8) 47.0
 
April 17, 2021, 8 p.m. 1.1 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 1.6 μg/m3 (7) 46.0
 
April 17, 2021, 7 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) N/A N/A 1.5 μg/m3 (7) 46.0
 
April 17, 2021, 6 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) N/A N/A 1.5 μg/m3 (7) 45.0
 
April 17, 2021, 5 p.m. 1.0 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) N/A N/A 1.4 μg/m3 (6) 44.0
 
April 17, 2021, 4 p.m. 1.5 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 1.1 μg/m3 (5) 39.0
 
April 17, 2021, 3 p.m. 2.3 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 1.1 μg/m3 (5) 32.0
 
April 17, 2021, 2 p.m. 5.5 ppb (6) 2.3 ppb (3) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (25) N/A N/A 2.0 μg/m3 (9) 25.0
 
April 17, 2021, 1 p.m. 6.6 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (13) N/A N/A 2.5 μg/m3 (11) 13.0
 
April 17, 2021, noon 4.7 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 14.0 ppb (13) N/A N/A 2.4 μg/m3 (10) 13.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.0 μg/m3 (9) 18.0
 
April 17, 2021, 10 a.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (19) N/A N/A 2.3 μg/m3 (10) 19.0
 
April 17, 2021, 9 a.m. 3.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) N/A N/A 1.9 μg/m3 (8) 26.0
 
April 17, 2021, 8 a.m. 2.9 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 2.4 μg/m3 (10) 29.0
 
April 17, 2021, 7 a.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) N/A N/A 2.0 μg/m3 (9) 33.0
 
April 17, 2021, 6 a.m. 2.3 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 1.4 μg/m3 (6) 34.0
 
April 17, 2021, 5 a.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 1.5 μg/m3 (7) 32.0
 
April 17, 2021, 4 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 1.3 μg/m3 (6) 31.0
 
April 17, 2021, 3 a.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 1.1 μg/m3 (5) 33.0
 
April 17, 2021, 2 a.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 1.1 μg/m3 (5) 33.0
 
April 17, 2021, 1 a.m. 2.2 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 1.0 μg/m3 (5) 36.0
 
April 17, 2021, midnight 2.1 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) N/A N/A 0.9 μg/m3 (4) 37.0
 
April 16, 2021, 11 p.m. 1.6 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
April 16, 2021, 10 p.m. 1.4 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 0.8 μg/m3 (4) 38.0
 
April 16, 2021, 9 p.m. 1.6 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
April 16, 2021, 8 p.m. 1.5 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
April 16, 2021, 7 p.m. 1.5 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 16, 2021, 6 p.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 1.5 μg/m3 (7) 38.0
 
April 16, 2021, 5 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 2.8 μg/m3 (12) 34.0
 
April 16, 2021, 4 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
April 16, 2021, 3 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
April 16, 2021, 2 p.m. 4.2 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 2.5 μg/m3 (11) 27.0
 
April 16, 2021, 1 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A N/A 2.6 μg/m3 (11) 29.0
 
April 16, 2021, noon 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 2.1 μg/m3 (9) 30.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 1.6 μg/m3 (7) 29.0
 
April 16, 2021, 10 a.m. 1.9 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 1.8 μg/m3 (8) 30.0
 
April 16, 2021, 9 a.m. 1.6 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) N/A N/A 1.6 μg/m3 (7) 32.0
 
April 16, 2021, 8 a.m. 1.4 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) N/A N/A 2.0 μg/m3 (9) 33.0
 
April 16, 2021, 7 a.m. 1.9 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 2.1 μg/m3 (9) 29.0
 
April 16, 2021, 6 a.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 2.3 μg/m3 (10) 31.0
 
April 16, 2021, 5 a.m. 2.8 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (36) N/A N/A 3.5 μg/m3 (15) 36.0
 
April 16, 2021, 4 a.m. 1.7 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) N/A N/A 1.9 μg/m3 (8) 40.0
 
April 16, 2021, 3 a.m. 1.9 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 2.3 μg/m3 (10) 39.0
 
April 16, 2021, 2 a.m. 2.4 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 2.0 μg/m3 (9) 39.0
 
April 16, 2021, 1 a.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 38.0
 
April 16, 2021, midnight 2.0 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 1.3 μg/m3 (6) 43.0
 
April 15, 2021, 11 p.m. 2.5 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 1.5 μg/m3 (7) 46.0
 
April 15, 2021, 10 p.m. 2.1 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 1.3 μg/m3 (6) 44.0
 
April 15, 2021, 9 p.m. 2.6 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
April 15, 2021, 8 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) N/A N/A 2.8 μg/m3 (12) 43.0
 
April 15, 2021, 7 p.m. 2.1 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 3.6 μg/m3 (16) 42.0
 
April 15, 2021, 6 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 3.4 μg/m3 (15) 38.0
 
April 15, 2021, 5 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A 3.3 μg/m3 (14) 36.0
 
April 15, 2021, 4 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) N/A N/A 3.1 μg/m3 (13) 31.0
 
April 15, 2021, 3 p.m. 2.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 2.9 μg/m3 (13) 30.0
 
April 15, 2021, 2 p.m. 2.7 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) N/A N/A 3.1 μg/m3 (13) 28.0
 
April 15, 2021, 1 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) N/A N/A 2.9 μg/m3 (13) 27.0
 
April 15, 2021, noon 3.0 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (28) N/A N/A 2.9 μg/m3 (13) 28.0
 
April 15, 2021, 11 a.m. 2.6 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 2.7 μg/m3 (12) 29.0
 
April 15, 2021, 10 a.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) N/A N/A 2.3 μg/m3 (10) 28.0