ID: 2566

AQSQID: 490050007

Site Name: Smithfield

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

Updated: May 25, 2022, 5:28 a.m.

Location: Smithfield (W 220 N), UT

Reporting: True, Located: True

Current AQI: 37.0

Smithfield (W 220 N) UT, US: 41.842778, -111.85194

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2022, 3 a.m. 5.4 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) N/A N/A 7.4 μg/m3 (31) 37.0
 
May 25, 2022, 2 a.m. 2.9 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) N/A N/A 10.4 μg/m3 (44) 44.0
 
May 25, 2022, 1 a.m. 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 8.1 μg/m3 (34) 46.0
 
May 25, 2022, midnight 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (50) N/A N/A 4.7 μg/m3 (20) 50.0
 
May 24, 2022, 11 p.m. 2.4 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) N/A N/A 4.3 μg/m3 (18) 50.0
 
May 24, 2022, 10 p.m. 2.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (49) N/A N/A 3.6 μg/m3 (16) 49.0
 
May 24, 2022, 9 p.m. 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) N/A N/A 3.7 μg/m3 (16) 48.0
 
May 24, 2022, 8 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) N/A N/A 4.0 μg/m3 (17) 47.0
 
May 24, 2022, 7 p.m. 2.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) N/A N/A 3.7 μg/m3 (16) 47.0
 
May 24, 2022, 6 p.m. 2.4 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 3.7 μg/m3 (16) 46.0
 
May 24, 2022, 5 p.m. 2.8 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (44) N/A N/A 4.5 μg/m3 (19) 44.0
 
May 24, 2022, 4 p.m. 3.7 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) N/A N/A 4.3 μg/m3 (18) 39.0
 
May 24, 2022, 3 p.m. 4.7 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) N/A N/A 5.4 μg/m3 (23) 26.0
 
May 24, 2022, 2 p.m. 5.0 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (25) N/A N/A 4.8 μg/m3 (20) 25.0
 
May 24, 2022, 1 p.m. 8.8 ppb (9) 3.8 ppb (4) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) N/A N/A 5.7 μg/m3 (24) 24.0
 
May 24, 2022, noon 13.5 ppb (13) 3.2 ppb (4) N/A 11.0 ppb (11) N/A N/A 17.0 ppb (16) N/A N/A 4.5 μg/m3 (19) 19.0
 
May 24, 2022, 10 a.m. 4.2 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (23) N/A N/A 3.9 μg/m3 (17) 23.0
 
May 24, 2022, 9 a.m. 5.8 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (22) N/A N/A 3.2 μg/m3 (14) 22.0
 
May 24, 2022, 8 a.m. 5.7 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) N/A N/A 2.6 μg/m3 (11) 29.0
 
May 24, 2022, 6 a.m. 3.8 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (34) N/A N/A 2.5 μg/m3 (11) 34.0
 
May 24, 2022, 5 a.m. 3.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 2.2 μg/m3 (10) 38.0
 
May 24, 2022, 5 a.m. 3.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 2.2 μg/m3 (10) 38.0
 
May 24, 2022, 4 a.m. 3.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
May 24, 2022, 4 a.m. 3.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
May 24, 2022, 3 a.m. 5.4 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) N/A N/A 3.0 μg/m3 (13) 32.0
 
May 24, 2022, 3 a.m. 5.4 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (32) N/A N/A 3.0 μg/m3 (13) 32.0
 
May 24, 2022, 2 a.m. 3.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
May 24, 2022, 2 a.m. 3.2 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
May 24, 2022, 1 a.m. 2.5 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 1.8 μg/m3 (8) 41.0
 
May 24, 2022, 1 a.m. 2.5 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 1.8 μg/m3 (8) 41.0
 
May 24, 2022, midnight 2.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 1.6 μg/m3 (7) 42.0
 
May 24, 2022, midnight 2.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 1.6 μg/m3 (7) 42.0
 
May 23, 2022, 11 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 2.0 μg/m3 (9) 43.0
 
May 23, 2022, 11 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 2.0 μg/m3 (9) 43.0
 
May 23, 2022, 8 p.m. 1.6 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
May 23, 2022, 7 p.m. 1.5 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
May 23, 2022, 6 p.m. 1.5 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) N/A N/A 1.4 μg/m3 (6) 34.0
 
May 23, 2022, 3 p.m. 3.1 ppb (3) 1.3 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 2.2 μg/m3 (10) 34.0
 
May 23, 2022, 2 p.m. 4.9 ppb (5) 2.4 ppb (3) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 2.6 μg/m3 (11) 27.0
 
May 23, 2022, 11 a.m. 11.8 ppb (12) 2.9 ppb (3) N/A 9.0 ppb (9) N/A N/A 16.0 ppb (15) N/A N/A 2.5 μg/m3 (11) 15.0
 
May 23, 2022, 10 a.m. 8.2 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A 19.0 ppb (18) N/A N/A 2.7 μg/m3 (12) 18.0
 
May 23, 2022, 10 a.m. 8.2 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (7) N/A N/A 19.0 ppb (18) N/A N/A 2.7 μg/m3 (12) 18.0
 
May 23, 2022, 9 a.m. 6.1 ppb (6) 1.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) N/A N/A 2.5 μg/m3 (11) 21.0
 
May 23, 2022, 3 a.m. 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) N/A N/A 1.6 μg/m3 (7) 37.0
 
May 23, 2022, 2 a.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) N/A N/A 1.9 μg/m3 (8) 40.0
 
May 23, 2022, 1 a.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 1.8 μg/m3 (8) 44.0
 
May 23, 2022, midnight 2.0 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 1.8 μg/m3 (8) 44.0
 
May 22, 2022, 11 p.m. 2.7 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 1.9 μg/m3 (8) 38.0
 
May 22, 2022, 9 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 1.6 μg/m3 (7) 41.0
 
May 22, 2022, 8 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 1.6 μg/m3 (7) 44.0
 
May 22, 2022, 7 p.m. 1.7 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (45) N/A N/A 1.5 μg/m3 (7) 45.0
 
May 22, 2022, 6 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (45) N/A N/A 1.0 μg/m3 (5) 45.0
 
May 22, 2022, 5 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 1.7 μg/m3 (8) 38.0
 
May 22, 2022, 4 p.m. 2.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 1.7 μg/m3 (8) 34.0
 
May 22, 2022, 3 p.m. 2.8 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 1.9 μg/m3 (8) 29.0
 
May 22, 2022, 2 p.m. 3.0 ppb (3) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) N/A N/A 1.6 μg/m3 (7) 28.0
 
May 22, 2022, 1 p.m. 4.3 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 2.3 μg/m3 (10) 24.0
 
May 22, 2022, 1 p.m. 4.3 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 2.3 μg/m3 (10) 24.0
 
May 22, 2022, noon 4.9 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (17) N/A N/A 2.9 μg/m3 (13) 17.0
 
May 22, 2022, 11 a.m. 4.5 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (20) N/A N/A 3.3 μg/m3 (14) 20.0
 
May 22, 2022, 10 a.m. 4.9 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (20) N/A N/A 2.9 μg/m3 (13) 20.0
 
May 22, 2022, 9 a.m. 4.2 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (22) N/A N/A 3.2 μg/m3 (14) 22.0
 
May 22, 2022, 8 a.m. 4.9 ppb (5) 1.4 ppb (2) N/A 4.0 ppb (4) N/A N/A 21.0 ppb (20) N/A N/A 3.1 μg/m3 (13) 20.0
 
May 22, 2022, 7 a.m. 4.9 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (18) N/A N/A 4.4 μg/m3 (19) 19.0
 
May 22, 2022, 5 a.m. 4.0 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) N/A N/A 2.6 μg/m3 (11) 28.0
 
May 22, 2022, 3 a.m. 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 2.7 μg/m3 (12) 38.0
 
May 22, 2022, 2 a.m. 2.3 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) N/A N/A 2.1 μg/m3 (9) 40.0
 
May 22, 2022, 1 a.m. 1.7 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 1.4 μg/m3 (6) 42.0
 
May 22, 2022, midnight 2.4 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 3.8 μg/m3 (16) 43.0
 
May 21, 2022, 11 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 1.4 μg/m3 (6) 42.0
 
May 21, 2022, 10 p.m. 1.7 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 1.3 μg/m3 (6) 42.0
 
May 21, 2022, 9 p.m. 1.6 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A 1.3 μg/m3 (6) 41.0
 
May 21, 2022, 8 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) N/A N/A 1.3 μg/m3 (6) 40.0
 
May 21, 2022, 7 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 1.3 μg/m3 (6) 39.0
 
May 21, 2022, 6 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 1.5 μg/m3 (7) 39.0
 
May 21, 2022, 5 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 1.6 μg/m3 (7) 38.0
 
May 21, 2022, 4 p.m. 2.4 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 1.8 μg/m3 (8) 36.0
 
May 21, 2022, 3 p.m. 3.0 ppb (3) 1.4 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 1.9 μg/m3 (8) 32.0
 
May 21, 2022, 2 p.m. 4.0 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 3.1 μg/m3 (13) 27.0
 
May 21, 2022, 1 p.m. 4.7 ppb (5) 2.3 ppb (3) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 2.5 μg/m3 (11) 24.0
 
May 21, 2022, 1 p.m. 4.7 ppb (5) 2.3 ppb (3) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 2.5 μg/m3 (11) 24.0
 
May 21, 2022, noon 6.2 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (24) N/A N/A 2.2 μg/m3 (10) 24.0
 
May 21, 2022, 10 a.m. 3.5 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (21) N/A N/A 2.1 μg/m3 (9) 21.0
 
May 21, 2022, 9 a.m. 3.4 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) N/A N/A 2.2 μg/m3 (10) 24.0
 
May 21, 2022, 8 a.m. 3.7 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (21) N/A N/A 2.6 μg/m3 (11) 21.0
 
May 21, 2022, 4 a.m. 5.5 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) N/A N/A 3.3 μg/m3 (14) 26.0
 
May 21, 2022, 3 a.m. 4.3 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 1.4 μg/m3 (6) 29.0
 
May 21, 2022, 2 a.m. 3.4 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) N/A N/A 1.1 μg/m3 (5) 35.0
 
May 21, 2022, 1 a.m. 2.9 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
May 21, 2022, midnight 2.6 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
May 20, 2022, 11 p.m. 2.3 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 0.8 μg/m3 (4) 39.0
 
May 20, 2022, 10 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 0.8 μg/m3 (4) 38.0
 
May 20, 2022, 9 p.m. 2.2 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
May 20, 2022, 7 p.m. 2.1 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) N/A N/A 1.1 μg/m3 (5) 37.0
 
May 20, 2022, 6 p.m. 2.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 1.0 μg/m3 (5) 34.0
 
May 20, 2022, 5 p.m. 2.7 ppb (3) 1.3 ppb (2) 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
 
May 20, 2022, 4 p.m. 2.6 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 1.2 μg/m3 (5) 32.0
 
May 20, 2022, 3 p.m. 3.5 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 1.0 μg/m3 (5) 33.0
 
May 20, 2022, 2 p.m. 5.1 ppb (5) 2.4 ppb (3) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) N/A N/A 1.7 μg/m3 (8) 26.0
 
May 20, 2022, 1 p.m. 5.8 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) N/A N/A 2.2 μg/m3 (10) 23.0
 
May 20, 2022, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 1.7 μg/m3 (8) 26.0
 
May 20, 2022, 10 a.m. 5.0 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 1.7 μg/m3 (8) 27.0
 
May 20, 2022, 9 a.m. 4.4 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 2.3 μg/m3 (10) 30.0
 
May 20, 2022, 8 a.m. 3.7 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 2.4 μg/m3 (10) 34.0
 
May 20, 2022, 7 a.m. 3.8 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 2.4 μg/m3 (10) 34.0
 
May 20, 2022, 6 a.m. 3.3 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 2.3 μg/m3 (10) 38.0
 
May 20, 2022, 5 a.m. 3.4 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 2.5 μg/m3 (11) 38.0
 
May 20, 2022, 4 a.m. 3.4 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 4.1 μg/m3 (18) 41.0
 
May 20, 2022, 3 a.m. 3.5 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 3.8 μg/m3 (16) 41.0
 
May 20, 2022, 2 a.m. 3.6 ppb (4) 1.7 ppb (2) 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
 
May 20, 2022, 1 a.m. 3.1 ppb (3) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 3.2 μg/m3 (14) 43.0
 
May 20, 2022, 1 a.m. 3.1 ppb (3) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 3.2 μg/m3 (14) 43.0
 
May 20, 2022, midnight 3.4 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 5.6 μg/m3 (24) 42.0
 
May 20, 2022, midnight 3.4 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 5.6 μg/m3 (24) 42.0
 
May 19, 2022, 11 p.m. 3.3 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) N/A N/A 9.5 μg/m3 (40) 42.0
 
May 19, 2022, 10 p.m. 3.9 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (41) N/A N/A 6.4 μg/m3 (27) 41.0
 
May 19, 2022, 9 p.m. 3.1 ppb (3) 1.6 ppb (2) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 4.7 μg/m3 (20) 44.0
 
May 19, 2022, 8 p.m. 3.2 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 3.7 μg/m3 (16) 41.0
 
May 19, 2022, 7 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
May 19, 2022, 7 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
May 19, 2022, 4 p.m. 3.2 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) N/A N/A 4.5 μg/m3 (19) 31.0
 
May 19, 2022, 2 p.m. 4.6 ppb (5) 1.6 ppb (2) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (25) N/A N/A 7.1 μg/m3 (30) 30.0
 
May 19, 2022, 6 a.m. 4.5 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) N/A N/A 4.2 μg/m3 (18) 33.0
 
May 19, 2022, 5 a.m. 4.1 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) N/A N/A 3.7 μg/m3 (16) 37.0
 
May 19, 2022, 4 a.m. 3.5 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) N/A N/A 4.6 μg/m3 (20) 39.0
 
May 19, 2022, 3 a.m. 5.6 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) N/A N/A 5.1 μg/m3 (22) 36.0
 
May 19, 2022, 2 a.m. 4.3 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (43) N/A N/A 5.3 μg/m3 (23) 43.0
 
May 19, 2022, 1 a.m. 2.4 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (45) N/A N/A 5.1 μg/m3 (22) 45.0
 
May 18, 2022, 11 p.m. 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 4.6 μg/m3 (20) 46.0
 
May 18, 2022, 10 p.m. 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (50) N/A N/A 5.0 μg/m3 (21) 50.0
 
May 18, 2022, 9 p.m. 2.5 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (50) N/A N/A 6.5 μg/m3 (28) 50.0
 
May 18, 2022, 8 p.m. 5.3 ppb (5) 2.5 ppb (3) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) N/A N/A 7.4 μg/m3 (31) 50.0
 
May 18, 2022, 7 p.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) N/A N/A 8.0 μg/m3 (34) 50.0
 
May 18, 2022, 5 p.m. 3.8 ppb (4) 1.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (46) N/A N/A 6.6 μg/m3 (28) 46.0
 
May 18, 2022, 4 p.m. 2.9 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 6.8 μg/m3 (29) 38.0
 
May 18, 2022, 4 p.m. 2.9 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) N/A N/A 6.8 μg/m3 (29) 38.0
 
May 18, 2022, 3 p.m. 4.7 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 7.3 μg/m3 (31) 33.0
 
May 18, 2022, 3 p.m. 4.7 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 7.3 μg/m3 (31) 33.0
 
May 18, 2022, 2 p.m. 6.1 ppb (6) 2.4 ppb (3) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 6.9 μg/m3 (29) 29.0
 
May 18, 2022, 2 p.m. 6.1 ppb (6) 2.4 ppb (3) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 6.9 μg/m3 (29) 29.0
 
May 18, 2022, 1 p.m. 18.8 ppb (18) 7.3 ppb (7) N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) N/A N/A 8.1 μg/m3 (34) 34.0
 
May 18, 2022, 1 p.m. 18.8 ppb (18) 7.3 ppb (7) N/A 12.0 ppb (12) N/A N/A 18.0 ppb (17) N/A N/A 8.1 μg/m3 (34) 34.0
 
May 18, 2022, noon 9.5 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) N/A N/A 6.9 μg/m3 (29) 29.0
 
May 18, 2022, noon 9.5 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (7) N/A N/A 18.0 ppb (17) N/A N/A 6.9 μg/m3 (29) 29.0
 
May 18, 2022, 11 a.m. 4.1 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (22) N/A N/A 5.8 μg/m3 (25) 25.0
 
May 18, 2022, 10 a.m. 3.8 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (21) N/A N/A 5.3 μg/m3 (23) 23.0
 
May 18, 2022, 2 a.m. 3.7 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
May 18, 2022, 1 a.m. 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 4.2 μg/m3 (18) 43.0
 
May 18, 2022, midnight 2.4 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 3.5 μg/m3 (15) 46.0
 
May 17, 2022, 11 p.m. 2.1 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) N/A N/A 3.6 μg/m3 (16) 47.0
 
May 17, 2022, 10 p.m. 2.3 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 3.5 μg/m3 (15) 46.0
 
May 17, 2022, 9 p.m. 2.1 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 3.5 μg/m3 (15) 46.0
 
May 17, 2022, 9 p.m. 2.1 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (46) N/A N/A 3.5 μg/m3 (15) 46.0
 
May 17, 2022, 8 p.m. 2.5 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (45) N/A N/A 3.8 μg/m3 (16) 45.0
 
May 17, 2022, 7 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 5.3 μg/m3 (23) 43.0
 
May 17, 2022, 7 p.m. 2.8 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 5.3 μg/m3 (23) 43.0
 
May 17, 2022, 6 p.m. 3.6 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) N/A N/A 4.5 μg/m3 (19) 42.0
 
May 17, 2022, 6 p.m. 3.6 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) N/A N/A 4.5 μg/m3 (19) 42.0
 
May 17, 2022, 5 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
May 17, 2022, 5 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
May 17, 2022, 4 p.m. 4.0 ppb (4) 1.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
May 17, 2022, 4 p.m. 4.0 ppb (4) 1.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
May 17, 2022, 3 p.m. 7.8 ppb (8) 3.7 ppb (4) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (25) N/A N/A 6.3 μg/m3 (27) 27.0
 
May 17, 2022, 3 p.m. 7.8 ppb (8) 3.7 ppb (4) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (25) N/A N/A 6.3 μg/m3 (27) 27.0
 
May 17, 2022, 2 p.m. 8.0 ppb (8) 4.1 ppb (4) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (17) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 17, 2022, noon 6.2 ppb (6) 2.2 ppb (3) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (15) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 17, 2022, noon 6.2 ppb (6) 2.2 ppb (3) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (15) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 17, 2022, 10 a.m. 3.3 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (20) N/A N/A 4.6 μg/m3 (20) 20.0