ID: 2076

AQSQID: 000091701

Site Name: Steeper

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

Updated: April 13, 2021, 3:43 a.m.

Location: Alberta (Yellowhead Co), CC

Reporting: True, Located: True

Current AQI: 45.0

Alberta (Yellowhead Co) CC, CA: 53.1325, -117.09111

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 12, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.7 μg/m3 (3) 45.0
 
April 12, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.7 μg/m3 (3) 44.0
 
April 12, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.8 μg/m3 (4) 43.0
 
April 12, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 45.0 ppb (42) N/A N/A 0.8 μg/m3 (4) 42.0
 
April 12, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 0.9 μg/m3 (4) 39.0
 
April 12, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 1.2 μg/m3 (5) 37.0
 
April 12, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 1.0 μg/m3 (5) 35.0
 
April 12, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 0.8 μg/m3 (4) 32.0
 
April 12, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 0.9 μg/m3 (4) 34.0
 
April 12, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 0.8 μg/m3 (4) 32.0
 
April 12, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 0.6 μg/m3 (3) 35.0
 
April 12, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.6 μg/m3 (3) 3.0
 
April 12, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 0.5 μg/m3 (3) 37.0
 
April 12, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.6 μg/m3 (3) 38.0
 
April 12, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.5 μg/m3 (3) 38.0
 
April 12, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.4 μg/m3 (2) 38.0
 
April 12, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.4 μg/m3 (2) 38.0
 
April 12, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.3 μg/m3 (2) 40.0
 
April 12, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.3 μg/m3 (2) 40.0
 
April 12, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.4 μg/m3 (2) 40.0
 
April 12, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.4 μg/m3 (2) 42.0
 
April 12, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.4 μg/m3 (2) 41.0
 
April 11, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.5 μg/m3 (3) 42.0
 
April 11, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.4 μg/m3 (2) 42.0
 
April 11, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.4 μg/m3 (2) 42.0
 
April 11, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.5 μg/m3 (3) 42.0
 
April 11, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.3 μg/m3 (2) 43.0
 
April 11, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.3 μg/m3 (2) 44.0
 
April 11, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.3 μg/m3 (2) 44.0
 
April 11, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.3 μg/m3 (2) 41.0
 
April 11, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 0.4 μg/m3 (2) 37.0
 
April 11, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 0.4 μg/m3 (2) 37.0
 
April 11, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 0.4 μg/m3 (2) 34.0
 
April 11, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 0.6 μg/m3 (3) 32.0
 
April 11, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
April 11, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
April 11, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 1.0 μg/m3 (5) 31.0
 
April 11, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 1.0 μg/m3 (5) 34.0
 
April 11, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 1.1 μg/m3 (5) 35.0
 
April 11, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 1.2 μg/m3 (5) 36.0
 
April 11, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 1.2 μg/m3 (5) 36.0
 
April 11, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 11, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.7 μg/m3 (3) 41.0
 
April 11, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.7 μg/m3 (3) 41.0
 
April 11, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.7 μg/m3 (3) 41.0
 
April 11, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.6 μg/m3 (3) 41.0
 
April 10, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.6 μg/m3 (3) 42.0
 
April 10, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.7 μg/m3 (3) 43.0
 
April 10, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.6 μg/m3 (3) 40.0
 
April 10, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.5 μg/m3 (3) 41.0
 
April 10, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.5 μg/m3 (3) 42.0
 
April 10, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.5 μg/m3 (3) 43.0
 
April 10, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.5 μg/m3 (3) 44.0
 
April 10, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.4 μg/m3 (2) 43.0
 
April 10, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.9 μg/m3 (4) 40.0
 
April 10, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 1.3 μg/m3 (6) 38.0
 
April 10, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.6 μg/m3 (3) 40.0
 
April 10, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.6 μg/m3 (3) 42.0
 
April 10, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 1.2 μg/m3 (5) 44.0
 
April 10, 2021, 10 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
 
April 10, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.5 μg/m3 (3) 45.0
 
April 10, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 0.5 μg/m3 (3) 46.0
 
April 10, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 0.5 μg/m3 (3) 46.0
 
April 10, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.6 μg/m3 (3) 47.0
 
April 10, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.7 μg/m3 (3) 47.0
 
April 10, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.8 μg/m3 (4) 47.0
 
April 10, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.8 μg/m3 (4) 47.0
 
April 10, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.8 μg/m3 (4) 47.0
 
April 10, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 0.9 μg/m3 (4) 46.0
 
April 10, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.9 μg/m3 (4) 47.0
 
April 9, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.0 μg/m3 (5) 47.0
 
April 9, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 1.0 μg/m3 (5) 48.0
 
April 9, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 1.1 μg/m3 (5) 48.0
 
April 9, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 1.1 μg/m3 (5) 48.0
 
April 9, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
April 9, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
April 9, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
April 9, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.2 μg/m3 (5) 47.0
 
April 9, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.1 μg/m3 (5) 47.0
 
April 9, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.0 μg/m3 (5) 47.0
 
April 9, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.0 μg/m3 (5) 47.0
 
April 9, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.1 μg/m3 (5) 47.0
 
April 9, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.0 μg/m3 (5) 47.0
 
April 9, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
April 9, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 0.8 μg/m3 (4) 47.0
 
April 9, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 0.8 μg/m3 (4) 46.0
 
April 9, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.7 μg/m3 (3) 45.0
 
April 9, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.7 μg/m3 (3) 44.0
 
April 9, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.6 μg/m3 (3) 43.0
 
April 9, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.5 μg/m3 (3) 43.0
 
April 9, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.5 μg/m3 (3) 43.0
 
April 9, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.6 μg/m3 (3) 43.0
 
April 9, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.6 μg/m3 (3) 45.0
 
April 9, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.6 μg/m3 (3) 45.0
 
April 8, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.7 μg/m3 (3) 45.0
 
April 8, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 0.6 μg/m3 (3) 46.0
 
April 8, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.6 μg/m3 (3) 45.0
 
April 8, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.5 μg/m3 (3) 44.0
 
April 8, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.5 μg/m3 (3) 43.0
 
April 8, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.8 μg/m3 (4) 43.0
 
April 8, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 1.0 μg/m3 (5) 42.0
 
April 8, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 1.0 μg/m3 (5) 40.0
 
April 8, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
April 8, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 0.7 μg/m3 (3) 37.0
 
April 8, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 0.6 μg/m3 (3) 38.0
 
April 8, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 0.6 μg/m3 (3) 38.0
 
April 8, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.6 μg/m3 (3) 38.0
 
April 8, 2021, 10 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
 
April 8, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.6 μg/m3 (3) 41.0
 
April 8, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 0.6 μg/m3 (3) 39.0
 
April 8, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 0.4 μg/m3 (2) 38.0
 
April 8, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.5 μg/m3 (3) 40.0
 
April 8, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.5 μg/m3 (3) 38.0
 
April 8, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 0.4 μg/m3 (2) 39.0
 
April 8, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.5 μg/m3 (3) 38.0
 
April 8, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.4 μg/m3 (2) 40.0
 
April 8, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 0.6 μg/m3 (3) 43.0
 
April 8, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 0.9 μg/m3 (4) 44.0
 
April 7, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 1.0 μg/m3 (5) 46.0
 
April 7, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.2 μg/m3 (5) 47.0
 
April 7, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.6 μg/m3 (7) 47.0
 
April 7, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.8 μg/m3 (8) 47.0
 
April 7, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.4 μg/m3 (6) 47.0
 
April 7, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 1.8 μg/m3 (8) 47.0
 
April 7, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 2.2 μg/m3 (10) 47.0
 
April 7, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 3.6 μg/m3 (16) 49.0
 
April 7, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 4.6 μg/m3 (20) 48.0
 
April 7, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 4.8 μg/m3 (20) 47.0
 
April 7, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 6.3 μg/m3 (27) 46.0
 
April 7, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 7.0 μg/m3 (30) 42.0
 
April 7, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 7.2 μg/m3 (31) 41.0
 
April 7, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.5 μg/m3 (32) 32.0
 
April 7, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 7.7 μg/m3 (33) 46.0
 
April 7, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 7.0 μg/m3 (30) 42.0
 
April 7, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 6.7 μg/m3 (28) 42.0
 
April 7, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 6.7 μg/m3 (28) 43.0
 
April 7, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 6.5 μg/m3 (28) 45.0
 
April 7, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 6.6 μg/m3 (28) 46.0
 
April 7, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 6.9 μg/m3 (29) 47.0
 
April 7, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 8.2 μg/m3 (35) 48.0
 
April 7, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 8.4 μg/m3 (36) 49.0
 
April 7, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 8.7 μg/m3 (37) 49.0
 
April 6, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 9.0 μg/m3 (38) 50.0
 
April 6, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 9.2 μg/m3 (39) 50.0
 
April 6, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 7.3 μg/m3 (31) 48.0
 
April 6, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 7.0 μg/m3 (30) 47.0
 
April 6, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 6.8 μg/m3 (29) 46.0
 
April 6, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 6.1 μg/m3 (26) 44.0
 
April 6, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 5.8 μg/m3 (25) 41.0
 
April 6, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 5.8 μg/m3 (25) 43.0
 
April 6, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 5.5 μg/m3 (23) 40.0
 
April 6, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.1 μg/m3 (22) 38.0
 
April 6, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 5.1 μg/m3 (22) 40.0
 
April 6, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 5.1 μg/m3 (22) 42.0
 
April 6, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 5.2 μg/m3 (22) 43.0
 
April 6, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.4 μg/m3 (23) 23.0
 
April 6, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 5.2 μg/m3 (22) 46.0
 
April 6, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 5.2 μg/m3 (22) 47.0
 
April 6, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 5.6 μg/m3 (24) 47.0
 
April 6, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 5.9 μg/m3 (25) 47.0
 
April 6, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 6.1 μg/m3 (26) 46.0
 
April 6, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 6.0 μg/m3 (25) 46.0
 
April 6, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 6.2 μg/m3 (26) 47.0
 
April 6, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 6.8 μg/m3 (29) 48.0
 
April 6, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 54.0 ppb (50) N/A N/A 6.9 μg/m3 (29) 50.0
 
April 6, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 54.0 ppb (50) N/A N/A 8.0 μg/m3 (34) 50.0
 
April 5, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 54.0 ppb (50) N/A N/A 8.4 μg/m3 (36) 50.0
 
April 5, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 55.0 ppb (51) N/A N/A 9.6 μg/m3 (40) 51.0