ID: 2076

AQSQID: 000091701

Site Name: Steeper

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

Updated: April 16, 2021, 2:45 p.m.

Location: Alberta (Yellowhead Co), CC

Reporting: True, Located: True

Current AQI: 47.0

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 2, 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 1.5 μg/m3 (7) 48.0
 
April 2, 2021, 1 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 1.5 μg/m3 (7) 48.0
 
April 2, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 1.8 μg/m3 (8) 48.0
 
April 1, 2021, 11 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 1.9 μg/m3 (8) 49.0
 
April 1, 2021, 10 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 2.0 μg/m3 (9) 49.0
 
April 1, 2021, 9 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 2.0 μg/m3 (9) 49.0
 
April 1, 2021, 8 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 2.2 μg/m3 (10) 49.0
 
April 1, 2021, 7 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 2.7 μg/m3 (12) 49.0
 
April 1, 2021, 6 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 2.9 μg/m3 (13) 49.0
 
April 1, 2021, 5 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 3.3 μg/m3 (14) 49.0
 
April 1, 2021, 4 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 4.0 μg/m3 (17) 50.0
 
April 1, 2021, 3 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 4.4 μg/m3 (19) 50.0
 
April 1, 2021, 2 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 4.7 μg/m3 (20) 50.0
 
April 1, 2021, 1 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 4.7 μg/m3 (20) 50.0
 
April 1, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 5.0 μg/m3 (21) 50.0
 
March 31, 2021, 11 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 4.9 μg/m3 (21) 49.0
 
March 31, 2021, 10 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 4.5 μg/m3 (19) 49.0
 
March 31, 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 4.6 μg/m3 (20) 48.0
 
March 31, 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 4.3 μg/m3 (18) 48.0
 
March 31, 2021, 7 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 4.3 μg/m3 (18) 48.0
 
March 31, 2021, 6 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 4.5 μg/m3 (19) 49.0
 
March 31, 2021, 5 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 4.4 μg/m3 (19) 49.0
 
March 31, 2021, 4 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 4.1 μg/m3 (18) 48.0
 
March 31, 2021, 3 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 3.5 μg/m3 (15) 47.0
 
March 31, 2021, 2 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 2.6 μg/m3 (11) 46.0
 
March 31, 2021, 1 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 2.6 μg/m3 (11) 45.0
 
March 31, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 2.7 μg/m3 (12) 45.0
 
March 31, 2021, 11 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 2.2 μg/m3 (10) 44.0
 
March 31, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.6 μg/m3 (7) 7.0
 
March 31, 2021, 9 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 1.4 μg/m3 (6) 43.0
 
March 31, 2021, 8 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 0.9 μg/m3 (4) 43.0
 
March 31, 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 0.7 μg/m3 (3) 42.0
 
March 31, 2021, 6 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 0.7 μg/m3 (3) 42.0
 
March 31, 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 0.7 μg/m3 (3) 43.0
 
March 31, 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 0.8 μg/m3 (4) 43.0
 
March 31, 2021, 3 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 0.9 μg/m3 (4) 44.0
 
March 31, 2021, 2 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 0.9 μg/m3 (4) 44.0
 
March 31, 2021, 1 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 1.0 μg/m3 (5) 46.0
 
March 31, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
March 30, 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 1.2 μg/m3 (5) 47.0
 
March 30, 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 1.1 μg/m3 (5) 47.0
 
March 30, 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 1.2 μg/m3 (5) 47.0
 
March 30, 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 1.5 μg/m3 (7) 47.0
 
March 30, 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 2.2 μg/m3 (10) 47.0
 
March 30, 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 2.3 μg/m3 (10) 47.0
 
March 30, 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 2.3 μg/m3 (10) 47.0
 
March 30, 2021, 4 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 1.9 μg/m3 (8) 45.0
 
March 30, 2021, 3 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 1.8 μg/m3 (8) 43.0
 
March 30, 2021, 2 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 1.7 μg/m3 (8) 44.0
 
March 30, 2021, 1 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 1.6 μg/m3 (7) 43.0
 
March 30, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 1.6 μg/m3 (7) 44.0
 
March 30, 2021, 11 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 1.5 μg/m3 (7) 43.0
 
March 30, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
March 30, 2021, 9 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 1.1 μg/m3 (5) 43.0
 
March 30, 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 1.0 μg/m3 (5) 42.0
 
March 30, 2021, 7 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 0.8 μg/m3 (4) 40.0
 
March 30, 2021, 6 a.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 0.9 μg/m3 (4) 37.0
 
March 30, 2021, 5 a.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 1.0 μg/m3 (5) 37.0
 
March 30, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 1.1 μg/m3 (5) 38.0
 
March 30, 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 1.0 μg/m3 (5) 40.0
 
March 30, 2021, 2 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 0.9 μg/m3 (4) 40.0
 
March 30, 2021, 1 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 0.9 μg/m3 (4) 40.0
 
March 30, 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 1.0 μg/m3 (5) 41.0
 
March 29, 2021, 11 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 0.9 μg/m3 (4) 41.0
 
March 29, 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 1.0 μg/m3 (5) 42.0
 
March 29, 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 1.1 μg/m3 (5) 42.0
 
March 29, 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 1.0 μg/m3 (5) 42.0
 
March 29, 2021, 7 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 1.0 μg/m3 (5) 41.0
 
March 29, 2021, 6 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 1.1 μg/m3 (5) 40.0
 
March 29, 2021, 5 p.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 1.0 μg/m3 (5) 39.0
 
March 29, 2021, 4 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 0.9 μg/m3 (4) 38.0
 
March 29, 2021, 3 p.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 1.0 μg/m3 (5) 38.0
 
March 29, 2021, 2 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 1.0 μg/m3 (5) 37.0
 
March 29, 2021, 1 p.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 1.1 μg/m3 (5) 38.0
 
March 29, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 1.1 μg/m3 (5) 38.0
 
March 29, 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 1.1 μg/m3 (5) 38.0
 
March 29, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
March 29, 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 1.3 μg/m3 (6) 37.0
 
March 29, 2021, 8 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 1.4 μg/m3 (6) 36.0
 
March 29, 2021, 7 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 1.3 μg/m3 (6) 36.0
 
March 29, 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 1.3 μg/m3 (6) 36.0
 
March 29, 2021, 5 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 1.0 μg/m3 (5) 35.0
 
March 29, 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 0.8 μg/m3 (4) 43.0
 
March 29, 2021, 3 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 1.0 μg/m3 (5) 48.0
 
March 29, 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 1.0 μg/m3 (5) 48.0
 
March 29, 2021, 1 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 1.0 μg/m3 (5) 46.0
 
March 29, 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
 
March 28, 2021, 11 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 1.0 μg/m3 (5) 47.0
 
March 28, 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 1.2 μg/m3 (5) 48.0
 
March 28, 2021, 9 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 1.0 μg/m3 (5) 47.0
 
March 28, 2021, 8 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 0.5 μg/m3 (3) 45.0
 
March 28, 2021, 7 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 0.2 μg/m3 (1) 44.0
 
March 28, 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 0.2 μg/m3 (1) 44.0
 
March 28, 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 0.2 μg/m3 (1) 44.0
 
March 28, 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 0.2 μg/m3 (1) 43.0
 
March 28, 2021, 3 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 0.2 μg/m3 (1) 43.0
 
March 28, 2021, 2 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 0.2 μg/m3 (1) 42.0
 
March 28, 2021, 1 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 0.2 μg/m3 (1) 42.0
 
March 28, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 0.1 μg/m3 (1) 41.0
 
March 28, 2021, 11 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 0.2 μg/m3 (1) 42.0
 
March 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.2 μg/m3 (1) 1.0
 
March 28, 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 0.2 μg/m3 (1) 41.0
 
March 28, 2021, 8 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 0.2 μg/m3 (1) 41.0
 
March 28, 2021, 7 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 0.2 μg/m3 (1) 41.0
 
March 28, 2021, 6 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 0.3 μg/m3 (2) 41.0
 
March 28, 2021, 5 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 0.3 μg/m3 (2) 41.0
 
March 28, 2021, 4 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
 
March 28, 2021, 3 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
 
March 28, 2021, 2 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
 
March 28, 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
 
March 28, 2021, midnight 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
 
March 27, 2021, 11 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
 
March 27, 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 0.5 μg/m3 (3) 44.0
 
March 27, 2021, 9 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 0.6 μg/m3 (3) 44.0
 
March 27, 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 0.7 μg/m3 (3) 44.0
 
March 27, 2021, 7 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
 
March 27, 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 0.6 μg/m3 (3) 43.0
 
March 27, 2021, 5 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
 
March 27, 2021, 4 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 0.3 μg/m3 (2) 38.0
 
March 27, 2021, 3 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 0.3 μg/m3 (2) 40.0
 
March 27, 2021, 2 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 0.3 μg/m3 (2) 40.0
 
March 27, 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 0.5 μg/m3 (3) 40.0
 
March 27, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.8 μg/m3 (4) 38.0
 
March 27, 2021, 11 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 0.8 μg/m3 (4) 39.0
 
March 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
March 27, 2021, 9 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 1.2 μg/m3 (5) 38.0
 
March 27, 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 1.2 μg/m3 (5) 34.0
 
March 27, 2021, 7 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 1.1 μg/m3 (5) 30.0
 
March 27, 2021, 6 a.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 1.0 μg/m3 (5) 32.0
 
March 27, 2021, 5 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 0.9 μg/m3 (4) 34.0
 
March 27, 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
 
March 27, 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 0.7 μg/m3 (3) 38.0
 
March 27, 2021, 2 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 0.7 μg/m3 (3) 36.0
 
March 27, 2021, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
March 27, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
March 26, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 0.9 μg/m3 (4) 38.0
 
March 26, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 1.2 μg/m3 (5) 39.0
 
March 26, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 1.2 μg/m3 (5) 39.0
 
March 26, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 1.4 μg/m3 (6) 39.0
 
March 26, 2021, 7 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 1.8 μg/m3 (8) 38.0
 
March 26, 2021, 6 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 1.7 μg/m3 (8) 37.0
 
March 26, 2021, 5 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 1.5 μg/m3 (7) 38.0
 
March 26, 2021, 4 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 1.4 μg/m3 (6) 34.0
 
March 26, 2021, 3 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 1.4 μg/m3 (6) 32.0
 
March 26, 2021, 2 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 1.5 μg/m3 (7) 34.0
 
March 26, 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 1.6 μg/m3 (7) 34.0
 
March 26, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 1.5 μg/m3 (7) 28.0
 
March 26, 2021, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 1.4 μg/m3 (6) 21.0
 
March 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.4 μg/m3 (6) 6.0
 
March 26, 2021, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 1.6 μg/m3 (7) 23.0
 
March 26, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 1.6 μg/m3 (7) 26.0
 
March 26, 2021, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.6 μg/m3 (7) 27.0
 
March 26, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 1.7 μg/m3 (8) 25.0
 
March 26, 2021, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 1.8 μg/m3 (8) 25.0
 
March 26, 2021, 4 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 1.6 μg/m3 (7) 25.0
 
March 26, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 1.4 μg/m3 (6) 26.0
 
March 26, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.3 μg/m3 (6) 27.0
 
March 26, 2021, 1 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.3 μg/m3 (6) 27.0
 
March 26, 2021, midnight N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 1.4 μg/m3 (6) 28.0
 
March 25, 2021, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 1.4 μg/m3 (6) 28.0
 
March 25, 2021, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 1.3 μg/m3 (6) 28.0
 
March 25, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 1.2 μg/m3 (5) 27.0
 
March 25, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 1.3 μg/m3 (6) 26.0
 
March 25, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 1.2 μg/m3 (5) 26.0
 
March 25, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 1.2 μg/m3 (5) 25.0
 
March 25, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 1.3 μg/m3 (6) 24.0
 
March 25, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 1.6 μg/m3 (7) 24.0
 
March 25, 2021, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 1.4 μg/m3 (6) 24.0