ID: 861

AQSQID: 490353006

Site Name: Hawthorne

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

Updated: April 22, 2021, 10:45 a.m.

Location: Salt Lake City (Liberty Wells), UT

Reporting: True, Located: True

Current AQI: 32.0

Salt Lake City (Liberty Wells) UT, US: 40.733501, -111.871696

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 22, 2021, 9 a.m. 4.6 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 34.0 ppb (32) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 32.0
 
April 22, 2021, 8 a.m. 4.0 ppb (4) 0.1 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 43.0 ppb (40) 0.1 ppb (2) N/A 3.2 μg/m3 (14) 40.0
 
April 22, 2021, 7 a.m. 2.1 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) 0.1 ppb (2) N/A 4.2 μg/m3 (18) 43.0
 
April 22, 2021, 6 a.m. 1.3 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 2.0 ppb (3) 48.0 ppb (45) 0.0 ppb (0) N/A 3.3 μg/m3 (14) 45.0
 
April 22, 2021, 5 a.m. 1.9 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 47.0 ppb (44) 0.0 ppb (0) N/A 2.8 μg/m3 (12) 44.0
 
April 22, 2021, 4 a.m. 1.8 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 48.0 ppb (45) 0.0 ppb (0) N/A 2.7 μg/m3 (12) 45.0
 
April 22, 2021, 3 a.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 47.0 ppb (44) 0.0 ppb (0) N/A 2.9 μg/m3 (13) 44.0
 
April 22, 2021, 2 a.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 46.0 ppb (43) 0.0 ppb (0) N/A 2.7 μg/m3 (12) 43.0
 
April 22, 2021, 1 a.m. 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) 0.1 ppb (2) N/A 2.8 μg/m3 (12) 43.0
 
April 22, 2021, midnight 2.5 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 45.0 ppb (42) 0.0 ppb (0) N/A 2.8 μg/m3 (12) 42.0
 
April 21, 2021, 11 p.m. 2.6 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 44.0 ppb (41) 0.1 ppb (2) N/A 2.6 μg/m3 (11) 41.0
 
April 21, 2021, 10 p.m. 3.0 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) 0.1 ppb (2) N/A 2.8 μg/m3 (12) 40.0
 
April 21, 2021, 9 p.m. 2.4 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) 0.1 ppb (2) N/A 2.4 μg/m3 (10) 39.0
 
April 21, 2021, 8 p.m. 2.6 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 41.0 ppb (38) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 38.0
 
April 21, 2021, 7 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 40.0 ppb (38) 0.1 ppb (2) N/A 3.1 μg/m3 (13) 38.0
 
April 21, 2021, 6 p.m. 3.2 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 39.0 ppb (37) 0.1 ppb (2) N/A 2.8 μg/m3 (12) 37.0
 
April 21, 2021, 5 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 39.0 ppb (37) 0.1 ppb (2) N/A 2.7 μg/m3 (12) 37.0
 
April 21, 2021, 4 p.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 36.0
 
April 21, 2021, 3 p.m. 3.2 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 37.0 ppb (35) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 35.0
 
April 21, 2021, 2 p.m. 3.3 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 37.0 ppb (35) 0.1 ppb (2) N/A 2.4 μg/m3 (10) 35.0
 
April 21, 2021, 1 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 35.0
 
April 21, 2021, noon 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 38.0 ppb (36) 0.1 ppb (2) N/A 1.8 μg/m3 (8) 36.0
 
April 21, 2021, 11 a.m. 62.0 ppb (60) 23.7 ppb (23) N/A N/A N/A 2.0 ppb (3) N/A 0.1 ppb (2) N/A 1.8 μg/m3 (8) 60.0
 
April 21, 2021, 10 a.m. 1.5 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 43.0 ppb (40) 0.1 ppb (2) N/A 1.8 μg/m3 (8) 40.0
 
April 21, 2021, 9 a.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 2.0 ppb (3) 36.0 ppb (34) 0.1 ppb (2) N/A 1.9 μg/m3 (8) 34.0
 
April 21, 2021, 8 a.m. 1.6 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 44.0 ppb (41) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 41.0
 
April 21, 2021, 7 a.m. 1.8 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 45.0 ppb (42) 0.1 ppb (2) N/A 2.5 μg/m3 (11) 42.0
 
April 21, 2021, 6 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 46.0 ppb (43) 0.1 ppb (2) N/A 2.8 μg/m3 (12) 43.0
 
April 21, 2021, 5 a.m. 7.4 ppb (7) 0.3 ppb (1) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 41.0 ppb (38) 0.1 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
April 21, 2021, 4 a.m. 12.4 ppb (12) 0.3 ppb (1) N/A 12.0 ppb (12) N/A 2.0 ppb (3) 31.0 ppb (29) 0.2 ppb (3) N/A 5.4 μg/m3 (23) 29.0
 
April 21, 2021, 3 a.m. 10.5 ppb (10) 0.4 ppb (1) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 35.0 ppb (33) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 33.0
 
April 21, 2021, 2 a.m. 6.3 ppb (6) 0.1 ppb (1) N/A 6.0 ppb (6) N/A 2.0 ppb (3) 43.0 ppb (40) 0.1 ppb (2) N/A 5.3 μg/m3 (23) 40.0
 
April 21, 2021, 1 a.m. 3.6 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 48.0 ppb (45) 0.1 ppb (2) N/A 4.1 μg/m3 (18) 45.0
 
April 21, 2021, midnight 3.4 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 50.0 ppb (47) 0.1 ppb (2) N/A 3.8 μg/m3 (16) 47.0
 
April 20, 2021, 11 p.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 51.0 ppb (48) 0.1 ppb (2) N/A 4.5 μg/m3 (19) 48.0
 
April 20, 2021, 10 p.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 50.0 ppb (47) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 47.0
 
April 20, 2021, 9 p.m. 5.0 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 50.0 ppb (47) 0.1 ppb (2) N/A 5.6 μg/m3 (24) 47.0
 
April 20, 2021, 8 p.m. 5.2 ppb (5) 1.3 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 49.0 ppb (46) 0.1 ppb (2) N/A 4.4 μg/m3 (19) 46.0
 
April 20, 2021, 7 p.m. 6.3 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 47.0 ppb (44) 0.1 ppb (2) N/A N/A 44.0
 
April 20, 2021, 6 p.m. 4.7 ppb (5) 1.4 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 45.0 ppb (42) 0.1 ppb (2) N/A 3.4 μg/m3 (15) 42.0
 
April 20, 2021, 5 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 38.0
 
April 20, 2021, 4 p.m. 3.4 ppb (4) 1.3 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 35.0
 
April 20, 2021, 3 p.m. 3.5 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) 0.1 ppb (2) N/A 1.9 μg/m3 (8) 33.0
 
April 20, 2021, 2 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 2.1 μg/m3 (9) 32.0
 
April 20, 2021, 1 p.m. 3.8 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
April 20, 2021, noon 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 35.0 ppb (33) 0.1 ppb (2) N/A 1.9 μg/m3 (8) 33.0
 
April 20, 2021, 11 a.m. 1.7 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.0 ppb (0) N/A 2.2 μg/m3 (10) 34.0
 
April 20, 2021, 10 a.m. 1.2 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 36.0 ppb (34) 0.0 ppb (0) N/A 2.2 μg/m3 (10) 34.0
 
April 20, 2021, 9 a.m. 1.3 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) 0.1 ppb (2) N/A 2.3 μg/m3 (10) 28.0
 
April 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.4 μg/m3 (10) 10.0
 
April 20, 2021, 7 a.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 33.0 ppb (31) 0.0 ppb (0) N/A 2.1 μg/m3 (9) 31.0
 
April 20, 2021, 6 a.m. 9.8 ppb (10) 0.6 ppb (1) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 28.0 ppb (26) 0.1 ppb (2) N/A 2.3 μg/m3 (10) 26.0
 
April 20, 2021, 5 a.m. 14.2 ppb (14) 1.2 ppb (2) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 22.0 ppb (21) 0.1 ppb (2) N/A 2.3 μg/m3 (10) 21.0
 
April 20, 2021, 4 a.m. 9.5 ppb (9) 0.3 ppb (1) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 25.0 ppb (24) 0.1 ppb (2) N/A 3.6 μg/m3 (16) 24.0
 
April 20, 2021, 3 a.m. 4.9 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 32.0 ppb (30) 0.0 ppb (0) N/A 2.7 μg/m3 (12) 30.0
 
April 20, 2021, 2 a.m. 4.4 ppb (5) 0.1 ppb (1) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 35.0 ppb (33) 0.0 ppb (0) N/A 2.5 μg/m3 (11) 33.0
 
April 20, 2021, 1 a.m. 3.1 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 39.0 ppb (37) 0.1 ppb (2) N/A 2.6 μg/m3 (11) 37.0
 
April 20, 2021, midnight 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) 0.0 ppb (0) N/A 4.4 μg/m3 (19) 39.0
 
April 19, 2021, 11 p.m. 2.6 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) 0.0 ppb (0) N/A 7.7 μg/m3 (33) 40.0
 
April 19, 2021, 10 p.m. 3.2 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 41.0 ppb (38) 0.0 ppb (0) N/A 36.4 μg/m3 (104) 104.0
 
April 19, 2021, 9 p.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) 0.0 ppb (0) N/A 9.5 μg/m3 (40) 40.0
 
April 19, 2021, 8 p.m. 2.3 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 42.0 ppb (39) 0.1 ppb (2) N/A 2.7 μg/m3 (12) 39.0
 
April 19, 2021, 7 p.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 43.0 ppb (40) 0.1 ppb (2) N/A 3.1 μg/m3 (13) 40.0
 
April 19, 2021, 6 p.m. 2.4 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 43.0 ppb (40) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 40.0
 
April 19, 2021, 5 p.m. 4.2 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) 0.1 ppb (2) N/A 2.8 μg/m3 (12) 41.0
 
April 19, 2021, 4 p.m. 14.1 ppb (14) 5.0 ppb (5) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 36.0 ppb (34) 0.2 ppb (3) N/A 4.3 μg/m3 (18) 34.0
 
April 19, 2021, 3 p.m. 17.7 ppb (17) 5.9 ppb (6) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 31.0 ppb (29) 0.2 ppb (3) N/A 5.2 μg/m3 (22) 29.0
 
April 19, 2021, 2 p.m. 36.8 ppb (35) 14.7 ppb (14) N/A 22.0 ppb (21) N/A 1.0 ppb (2) 20.0 ppb (19) 0.3 ppb (4) N/A 5.9 μg/m3 (25) 35.0
 
April 19, 2021, 1 p.m. 61.2 ppb (59) 29.4 ppb (28) N/A 32.0 ppb (31) N/A 1.0 ppb (2) 5.0 ppb (5) 0.6 ppb (7) N/A 6.8 μg/m3 (29) 59.0
 
April 19, 2021, noon 39.2 ppb (37) 9.7 ppb (10) N/A 30.0 ppb (29) N/A 1.0 ppb (2) 4.0 ppb (4) 0.4 ppb (5) N/A 5.0 μg/m3 (21) 37.0
 
April 19, 2021, 11 a.m. 23.4 ppb (23) 2.2 ppb (3) N/A 21.0 ppb (20) N/A 1.0 ppb (2) 10.0 ppb (10) N/A N/A 4.4 μg/m3 (19) 23.0
 
April 19, 2021, 10 a.m. 17.8 ppb (17) 2.1 ppb (2) N/A 16.0 ppb (16) N/A 1.0 ppb (2) 16.0 ppb (15) 0.1 ppb (2) N/A 3.7 μg/m3 (16) 17.0
 
April 19, 2021, 9 a.m. 14.7 ppb (14) 0.6 ppb (1) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 13.0 ppb (13) 0.1 ppb (2) N/A 3.4 μg/m3 (15) 15.0
 
April 19, 2021, 8 a.m. 8.9 ppb (9) 1.4 ppb (2) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 27.0 ppb (25) 0.1 ppb (2) N/A 2.9 μg/m3 (13) 25.0
 
April 19, 2021, 7 a.m. 7.8 ppb (8) 0.4 ppb (1) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 30.0 ppb (28) 0.1 ppb (2) N/A 2.7 μg/m3 (12) 28.0
 
April 19, 2021, 6 a.m. 16.4 ppb (16) 1.2 ppb (2) N/A 15.0 ppb (15) N/A 1.0 ppb (2) 19.0 ppb (18) 0.2 ppb (3) N/A 4.4 μg/m3 (19) 19.0
 
April 19, 2021, 5 a.m. 13.4 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 24.0 ppb (23) 0.2 ppb (3) N/A 3.8 μg/m3 (16) 23.0
 
April 19, 2021, 4 a.m. 4.9 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 36.0 ppb (34) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
April 19, 2021, 3 a.m. 7.2 ppb (7) 0.5 ppb (1) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 3.4 μg/m3 (15) 32.0
 
April 19, 2021, 2 a.m. 12.2 ppb (12) 0.9 ppb (1) N/A 11.0 ppb (11) N/A 1.0 ppb (2) 33.0 ppb (31) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
April 19, 2021, 1 a.m. 3.3 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 45.0 ppb (42) 0.1 ppb (2) N/A 2.5 μg/m3 (11) 42.0
 
April 19, 2021, midnight 2.6 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 47.0 ppb (44) 0.1 ppb (2) N/A 2.4 μg/m3 (10) 44.0
 
April 18, 2021, 11 p.m. 1.8 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 49.0 ppb (46) 0.1 ppb (2) N/A 2.5 μg/m3 (11) 46.0
 
April 18, 2021, 10 p.m. 2.1 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 50.0 ppb (47) 0.0 ppb (0) N/A 3.3 μg/m3 (14) 47.0
 
April 18, 2021, 9 p.m. 2.3 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 51.0 ppb (48) 0.0 ppb (0) N/A 3.3 μg/m3 (14) 48.0
 
April 18, 2021, 8 p.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 52.0 ppb (49) 0.1 ppb (2) N/A 3.4 μg/m3 (15) 49.0
 
April 18, 2021, 7 p.m. 4.4 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 52.0 ppb (49) 0.1 ppb (2) N/A 4.5 μg/m3 (19) 49.0
 
April 18, 2021, 6 p.m. 5.5 ppb (6) 1.4 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 48.0 ppb (45) 0.1 ppb (2) N/A 3.3 μg/m3 (14) 45.0
 
April 18, 2021, 5 p.m. 9.8 ppb (10) 2.9 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 44.0 ppb (41) 0.1 ppb (2) N/A 3.5 μg/m3 (15) 41.0
 
April 18, 2021, 4 p.m. 11.8 ppb (12) 3.8 ppb (4) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A 4.0 μg/m3 (17) 36.0
 
April 18, 2021, 3 p.m. 12.1 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 3.7 μg/m3 (16) 32.0
 
April 18, 2021, 2 p.m. 17.3 ppb (17) 5.2 ppb (5) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 29.0 ppb (27) 0.1 ppb (2) N/A 3.9 μg/m3 (17) 27.0
 
April 18, 2021, 1 p.m. 42.0 ppb (40) 13.3 ppb (13) N/A 29.0 ppb (28) N/A 1.0 ppb (2) 11.0 ppb (11) 0.3 ppb (4) N/A 5.8 μg/m3 (25) 40.0
 
April 18, 2021, noon 36.2 ppb (35) 5.6 ppb (6) N/A 31.0 ppb (30) N/A 1.0 ppb (2) 7.0 ppb (7) 0.2 ppb (3) N/A 6.5 μg/m3 (28) 35.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 8.0 ppb (8) 0.2 ppb (3) N/A 6.1 μg/m3 (26) 26.0
 
April 18, 2021, 10 a.m. 11.4 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (11) N/A 1.0 ppb (2) 27.0 ppb (25) 0.1 ppb (2) N/A 2.8 μg/m3 (12) 25.0
 
April 18, 2021, 9 a.m. 14.3 ppb (14) 0.5 ppb (1) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 23.0 ppb (22) 0.2 ppb (3) N/A 3.1 μg/m3 (13) 22.0
 
April 18, 2021, 8 a.m. 13.7 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 27.0 ppb (25) 0.2 ppb (3) N/A 3.3 μg/m3 (14) 25.0
 
April 18, 2021, 7 a.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 42.0 ppb (39) 0.1 ppb (2) N/A 1.8 μg/m3 (8) 39.0
 
April 18, 2021, 6 a.m. 6.8 ppb (7) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 36.0 ppb (34) 0.1 ppb (2) N/A 3.1 μg/m3 (13) 34.0
 
April 18, 2021, 5 a.m. 15.3 ppb (15) 0.9 ppb (1) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 24.0 ppb (23) 0.2 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
April 18, 2021, 4 a.m. 13.0 ppb (13) 1.2 ppb (2) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 29.0 ppb (27) 0.2 ppb (3) N/A 18.5 μg/m3 (65) 65.0
 
April 18, 2021, 3 a.m. 14.1 ppb (14) 0.8 ppb (1) N/A 13.0 ppb (13) N/A 1.0 ppb (2) 31.0 ppb (29) 0.2 ppb (3) N/A 5.3 μg/m3 (23) 29.0
 
April 18, 2021, 2 a.m. 6.5 ppb (7) 0.2 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 42.0 ppb (39) 0.1 ppb (2) N/A 3.8 μg/m3 (16) 39.0
 
April 18, 2021, 1 a.m. 3.7 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 47.0 ppb (44) 0.1 ppb (2) N/A 3.1 μg/m3 (13) 44.0
 
April 18, 2021, midnight 2.6 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 48.0 ppb (45) 0.1 ppb (2) N/A 2.4 μg/m3 (10) 45.0
 
April 17, 2021, 11 p.m. 2.5 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 49.0 ppb (46) 0.1 ppb (2) N/A 1.9 μg/m3 (8) 46.0
 
April 17, 2021, 10 p.m. 1.6 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 50.0 ppb (47) 0.1 ppb (2) N/A 1.4 μg/m3 (6) 47.0
 
April 17, 2021, 9 p.m. 1.3 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 50.0 ppb (47) 0.0 ppb (0) N/A 1.2 μg/m3 (5) 47.0
 
April 17, 2021, 8 p.m. 1.4 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 49.0 ppb (46) 0.1 ppb (2) N/A 1.1 μg/m3 (5) 46.0
 
April 17, 2021, 7 p.m. 1.9 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 47.0 ppb (44) 0.1 ppb (2) N/A 1.0 μg/m3 (5) 44.0
 
April 17, 2021, 6 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 45.0 ppb (42) 0.1 ppb (2) N/A 1.0 μg/m3 (5) 42.0
 
April 17, 2021, 5 p.m. 2.8 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 41.0 ppb (38) 0.1 ppb (2) N/A 3.8 μg/m3 (16) 38.0
 
April 17, 2021, 4 p.m. 2.5 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A 2.3 μg/m3 (10) 36.0
 
April 17, 2021, 3 p.m. 2.6 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 0.8 μg/m3 (4) 35.0
 
April 17, 2021, 2 p.m. 2.7 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 0.7 μg/m3 (3) 35.0
 
April 17, 2021, 1 p.m. 2.4 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) 0.1 ppb (2) N/A 1.0 μg/m3 (5) 34.0
 
April 17, 2021, noon 2.5 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 36.0 ppb (34) 0.1 ppb (2) N/A 0.9 μg/m3 (4) 34.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) 0.1 ppb (2) N/A 0.8 μg/m3 (4) 34.0
 
April 17, 2021, 10 a.m. 1.4 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 0.7 μg/m3 (3) 35.0
 
April 17, 2021, 9 a.m. 1.4 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 30.0 ppb (28) 0.1 ppb (2) N/A 0.7 μg/m3 (3) 28.0
 
April 17, 2021, 8 a.m. 1.4 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A 0.8 μg/m3 (4) 36.0
 
April 17, 2021, 7 a.m. 1.8 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 39.0 ppb (37) 0.1 ppb (2) N/A 0.5 μg/m3 (3) 37.0
 
April 17, 2021, 6 a.m. 1.5 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A -0.2 μg/m3 (0) 36.0
 
April 17, 2021, 5 a.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A -0.2 μg/m3 (0) 36.0
 
April 17, 2021, 4 a.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A -0.2 μg/m3 (0) 36.0
 
April 17, 2021, 3 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 38.0 ppb (36) 0.1 ppb (2) N/A -0.2 μg/m3 (0) 36.0
 
April 17, 2021, 2 a.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 36.0 ppb (34) 0.1 ppb (2) N/A -0.4 μg/m3 (0) 34.0
 
April 17, 2021, 1 a.m. 4.7 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 0.0 μg/m3 (0) 35.0
 
April 17, 2021, midnight 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 40.0 ppb (38) 0.1 ppb (2) N/A 1.5 μg/m3 (7) 38.0
 
April 16, 2021, 11 p.m. 6.7 ppb (7) 1.6 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 39.0 ppb (37) 0.1 ppb (2) N/A 1.7 μg/m3 (8) 37.0
 
April 16, 2021, 10 p.m. 8.8 ppb (9) 2.2 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 2.2 μg/m3 (10) 35.0
 
April 16, 2021, 9 p.m. 7.6 ppb (8) 2.4 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 35.0 ppb (33) 0.1 ppb (2) N/A 1.6 μg/m3 (7) 33.0
 
April 16, 2021, 8 p.m. 7.3 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 1.1 μg/m3 (5) 32.0
 
April 16, 2021, 7 p.m. 6.1 ppb (6) 2.2 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 0.8 μg/m3 (4) 32.0
 
April 16, 2021, 6 p.m. 3.4 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 0.0 μg/m3 (0) 32.0
 
April 16, 2021, 5 p.m. 3.9 ppb (4) 1.5 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 32.0 ppb (30) 0.1 ppb (2) N/A -0.1 μg/m3 (0) 30.0
 
April 16, 2021, 4 p.m. 4.5 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 31.0 ppb (29) 0.1 ppb (2) N/A -0.2 μg/m3 (0) 29.0
 
April 16, 2021, 3 p.m. 4.2 ppb (4) 1.4 ppb (2) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 29.0 ppb (27) 0.0 ppb (0) N/A -0.2 μg/m3 (0) 27.0
 
April 16, 2021, 2 p.m. 8.3 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 26.0 ppb (25) 0.1 ppb (2) N/A 0.1 μg/m3 (1) 25.0
 
April 16, 2021, 1 p.m. 19.7 ppb (19) 2.2 ppb (3) N/A 18.0 ppb (17) N/A 1.0 ppb (2) 22.0 ppb (21) 0.2 ppb (3) N/A 4.3 μg/m3 (18) 21.0
 
April 16, 2021, noon 17.1 ppb (17) 0.7 ppb (1) N/A 16.0 ppb (16) N/A 1.0 ppb (2) 23.0 ppb (22) 0.1 ppb (2) N/A 3.8 μg/m3 (16) 22.0
 
April 16, 2021, 11 a.m. 11.9 ppb (12) 0.4 ppb (1) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 26.0 ppb (25) 0.1 ppb (2) N/A 1.8 μg/m3 (8) 25.0
 
April 16, 2021, 10 a.m. 8.5 ppb (9) 0.2 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 28.0 ppb (26) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 26.0
 
April 16, 2021, 9 a.m. 8.2 ppb (8) 0.1 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 24.0 ppb (23) 0.1 ppb (2) N/A 3.3 μg/m3 (14) 23.0
 
April 16, 2021, 8 a.m. 6.4 ppb (7) 0.1 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 33.0 ppb (31) 0.0 ppb (0) N/A 2.3 μg/m3 (10) 31.0
 
April 16, 2021, 7 a.m. 9.8 ppb (10) 0.7 ppb (1) N/A 9.0 ppb (9) N/A 1.0 ppb (2) 30.0 ppb (28) 0.1 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
April 16, 2021, 6 a.m. 16.8 ppb (16) 0.6 ppb (1) N/A 16.0 ppb (16) N/A 1.0 ppb (2) 21.0 ppb (20) 0.1 ppb (2) N/A 3.9 μg/m3 (17) 20.0
 
April 16, 2021, 5 a.m. 21.3 ppb (21) 1.1 ppb (2) N/A 20.0 ppb (19) N/A 1.0 ppb (2) 13.0 ppb (13) 0.2 ppb (3) N/A 5.1 μg/m3 (22) 22.0
 
April 16, 2021, 4 a.m. 19.5 ppb (19) 1.4 ppb (2) N/A 18.0 ppb (17) N/A 1.0 ppb (2) 18.0 ppb (17) 0.2 ppb (3) N/A 3.9 μg/m3 (17) 19.0
 
April 16, 2021, 3 a.m. 12.8 ppb (13) 0.7 ppb (1) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 25.0 ppb (24) 0.1 ppb (2) N/A 3.5 μg/m3 (15) 24.0
 
April 16, 2021, 2 a.m. 6.4 ppb (7) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 32.0
 
April 16, 2021, 1 a.m. 4.8 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 2.3 μg/m3 (10) 35.0
 
April 16, 2021, midnight 6.8 ppb (7) 1.4 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) 37.0 ppb (35) 0.1 ppb (2) N/A 2.4 μg/m3 (10) 35.0
 
April 15, 2021, 11 p.m. 10.5 ppb (10) 2.2 ppb (3) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 34.0 ppb (32) 0.1 ppb (2) N/A 1.9 μg/m3 (8) 32.0
 
April 15, 2021, 10 p.m. 9.3 ppb (9) 1.6 ppb (2) N/A 8.0 ppb (8) N/A 1.0 ppb (2) 35.0 ppb (33) 0.1 ppb (2) N/A 2.3 μg/m3 (10) 33.0
 
April 15, 2021, 9 p.m. 6.5 ppb (7) 1.2 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 3.3 μg/m3 (14) 33.0
 
April 15, 2021, 8 p.m. 13.6 ppb (13) 3.2 ppb (4) N/A 10.0 ppb (10) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 4.1 μg/m3 (18) 32.0
 
April 15, 2021, 7 p.m. 16.1 ppb (16) 5.0 ppb (5) N/A 11.0 ppb (11) N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 8.2 μg/m3 (35) 35.0
 
April 15, 2021, 6 p.m. 18.5 ppb (18) 6.8 ppb (7) N/A 12.0 ppb (12) N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 11.3 μg/m3 (48) 48.0
 
April 15, 2021, 5 p.m. 34.8 ppb (33) 14.5 ppb (14) N/A 20.0 ppb (19) N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 13.9 μg/m3 (55) 55.0
 
April 15, 2021, 4 p.m. 35.9 ppb (34) 10.8 ppb (11) N/A 25.0 ppb (24) N/A 1.0 ppb (2) 10.0 ppb (10) 0.2 ppb (3) N/A 12.2 μg/m3 (52) 52.0
 
April 15, 2021, 3 p.m. 20.7 ppb (20) 4.1 ppb (4) N/A 17.0 ppb (17) N/A 1.0 ppb (2) 17.0 ppb (16) 0.1 ppb (2) N/A 8.6 μg/m3 (36) 36.0
 
April 15, 2021, 2 p.m. 5.3 ppb (5) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 29.0 ppb (27) 0.0 ppb (0) N/A 3.2 μg/m3 (14) 27.0
 
April 15, 2021, 1 p.m. 4.7 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 30.0 ppb (28) 0.0 ppb (0) N/A 2.6 μg/m3 (11) 28.0
 
April 15, 2021, noon 3.6 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 31.0 ppb (29) 0.0 ppb (0) N/A 2.2 μg/m3 (10) 29.0
 
April 15, 2021, 11 a.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) 0.0 ppb (0) N/A 2.1 μg/m3 (9) 29.0
 
April 15, 2021, 10 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) 0.0 ppb (0) N/A 1.9 μg/m3 (8) 29.0