AQSQID: 000091701

Site Name: Steeper

Location: 40 Hwy, CC

Reporting: True, Located: True

Current AQI: 38.0

40 Hwy CC, CA: 53.1325, -117.09111

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 24, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A -1.4 μg/m3 (0) 38.0
 
May 23, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A -1.9 μg/m3 (0) 35.0
 
May 23, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 0.5 μg/m3 (2) 34.0
 
May 23, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A -0.2 μg/m3 (0) 35.0
 
May 23, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
May 23, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A -0.9 μg/m3 (0) 36.0
 
May 23, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 0.3 μg/m3 (1) 36.0
 
May 23, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A -0.4 μg/m3 (0) 38.0
 
May 23, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A -0.6 μg/m3 (0) 28.0
 
May 23, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 2.6 μg/m3 (11) 25.0
 
May 23, 2019, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A -0.2 μg/m3 (0) 27.0
 
May 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) N/A
May 23, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A -0.1 μg/m3 (0) 21.0
 
May 23, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A -1.1 μg/m3 (0) 14.0
 
May 23, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 0.9 μg/m3 (4) 17.0
 
May 23, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 1.4 μg/m3 (6) 18.0
 
May 23, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 1.1 μg/m3 (5) 29.0
 
May 23, 2019, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 2.4 μg/m3 (10) 28.0
 
May 23, 2019, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 2.0 μg/m3 (8) 30.0
 
May 23, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 3.4 μg/m3 (14) 33.0
 
May 23, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
May 22, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 2.4 μg/m3 (10) 35.0
 
May 22, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 1.9 μg/m3 (8) 36.0
 
May 22, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 0.7 μg/m3 (3) 36.0
 
May 22, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 0.6 μg/m3 (2) 35.0
 
May 22, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 1.7 μg/m3 (7) 34.0
 
May 22, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 2.5 μg/m3 (10) 35.0
 
May 22, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 1.4 μg/m3 (6) 35.0
 
May 22, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 2.2 μg/m3 (9) 33.0
 
May 22, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 1.1 μg/m3 (5) 32.0
 
May 22, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 2.2 μg/m3 (9) 29.0
 
May 22, 2019, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
May 22, 2019, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 1.5 μg/m3 (6) 30.0
 
May 22, 2019, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 1.8 μg/m3 (8) 29.0
 
May 22, 2019, 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
 
May 22, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
May 22, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 0.5 μg/m3 (2) 28.0
 
May 22, 2019, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 1.4 μg/m3 (6) 23.0
 
May 22, 2019, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 1.7 μg/m3 (7) 25.0
 
May 22, 2019, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 1.0 μg/m3 (4) 27.0
 
May 22, 2019, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 1.8 μg/m3 (8) 28.0
 
May 22, 2019, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 1.6 μg/m3 (7) 30.0
 
May 22, 2019, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 1.4 μg/m3 (6) 32.0
 
May 22, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 1.8 μg/m3 (8) 34.0
 
May 21, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 1.6 μg/m3 (7) 36.0
 
May 21, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 1.3 μg/m3 (5) 37.0
 
May 21, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 4.3 μg/m3 (18) 35.0
 
May 21, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 2.3 μg/m3 (10) 35.0
 
May 21, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 3.6 μg/m3 (15) 34.0
 
May 21, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 2.7 μg/m3 (11) 33.0
 
May 21, 2019, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 4.5 μg/m3 (19) 29.0
 
May 21, 2019, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 3.6 μg/m3 (15) 27.0
 
May 21, 2019, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 3.1 μg/m3 (13) 27.0
 
May 21, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 3.7 μg/m3 (15) 25.0
 
May 21, 2019, noon N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 2.5 μg/m3 (10) 25.0
 
May 21, 2019, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 1.6 μg/m3 (7) 25.0
 
May 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.8 μg/m3 (8) 8.0
 
May 21, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 1.2 μg/m3 (5) 27.0
 
May 21, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
May 21, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 0.7 μg/m3 (3) 35.0
 
May 21, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 0.6 μg/m3 (2) 35.0
 
May 21, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 1.0 μg/m3 (4) 36.0
 
May 21, 2019, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 1.8 μg/m3 (8) 38.0
 
May 21, 2019, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (39) N/A N/A 1.6 μg/m3 (7) 39.0
 
May 21, 2019, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) N/A N/A 1.3 μg/m3 (5) 41.0
 
May 21, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 54.0 ppb (42) N/A N/A 0.6 μg/m3 (2) 42.0
 
May 21, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 56.0 ppb (43) N/A N/A 2.0 μg/m3 (8) 43.0
 
May 20, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 59.0 ppb (45) N/A N/A 1.5 μg/m3 (6) 45.0
 
May 20, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 59.0 ppb (45) N/A N/A 2.2 μg/m3 (9) 45.0
 
May 20, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 55.0 ppb (42) N/A N/A 1.2 μg/m3 (5) 42.0
 
May 20, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) N/A N/A 2.6 μg/m3 (11) 41.0
 
May 20, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 54.0 ppb (42) N/A N/A 1.9 μg/m3 (8) 42.0
 
May 20, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 54.0 ppb (42) N/A N/A 1.0 μg/m3 (4) 42.0
 
May 20, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (39) N/A N/A 1.7 μg/m3 (7) 39.0
 
May 20, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) N/A N/A 2.7 μg/m3 (11) 38.0
 
May 20, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) N/A N/A 2.2 μg/m3 (9) 38.0
 
May 20, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 0.6 μg/m3 (2) 34.0
 
May 20, 2019, noon N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.8 μg/m3 (3) 30.0
 
May 20, 2019, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 0.3 μg/m3 (1) 32.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.1 μg/m3 (0) N/A
May 20, 2019, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A -0.2 μg/m3 (0) 34.0
 
May 20, 2019, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 0.3 μg/m3 (1) 35.0
 
May 20, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A -0.9 μg/m3 (0) 36.0
 
May 20, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A -0.1 μg/m3 (0) 35.0
 
May 20, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 0.6 μg/m3 (2) 35.0
 
May 20, 2019, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 2.1 μg/m3 (9) 35.0
 
May 20, 2019, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 1.6 μg/m3 (7) 35.0
 
May 20, 2019, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 1.4 μg/m3 (6) 37.0
 
May 20, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 0.7 μg/m3 (3) 38.0
 
May 20, 2019, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 0.3 μg/m3 (1) 38.0
 
May 19, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.4 μg/m3 (2) 2.0
 
May 19, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
May 19, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
May 19, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
May 19, 2019, 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 0.0 μg/m3 (0) N/A
May 19, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 0.3 μg/m3 (1) 38.0
 
May 19, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 0.2 μg/m3 (1) 35.0
 
May 19, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 0.7 μg/m3 (3) 32.0
 
May 19, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 0.5 μg/m3 (2) 28.0
 
May 19, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 1.3 μg/m3 (5) 22.0
 
May 19, 2019, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 2.0 μg/m3 (8) 18.0
 
May 19, 2019, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 0.4 μg/m3 (2) 16.0
 
May 19, 2019, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 0.1 μg/m3 (0) 19.0
 
May 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.5 μg/m3 (2) 2.0
 
May 19, 2019, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A -0.7 μg/m3 (0) 27.0
 
May 19, 2019, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A -0.4 μg/m3 (0) 29.0
 
May 19, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A -0.2 μg/m3 (0) 30.0
 
May 19, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.1 μg/m3 (0) 30.0
 
May 19, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.3 μg/m3 (1) 30.0
 
May 19, 2019, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.0 μg/m3 (0) 30.0
 
May 19, 2019, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A -0.8 μg/m3 (0) 32.0
 
May 19, 2019, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 0.4 μg/m3 (2) 35.0
 
May 19, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 0.7 μg/m3 (3) 35.0
 
May 19, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 0.2 μg/m3 (1) 35.0
 
May 18, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A -0.2 μg/m3 (0) 35.0
 
May 18, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A -0.6 μg/m3 (0) 37.0
 
May 18, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A -1.1 μg/m3 (0) 36.0
 
May 18, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 0.0 μg/m3 (0) 36.0
 
May 18, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 1.0 μg/m3 (4) 32.0
 
May 18, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
May 18, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 1.7 μg/m3 (7) 25.0
 
May 18, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A 2.3 μg/m3 (10) 25.0
 
May 18, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 0.8 μg/m3 (3) 24.0
 
May 18, 2019, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 1.8 μg/m3 (8) 24.0
 
May 18, 2019, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 1.0 μg/m3 (4) 25.0
 
May 18, 2019, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 0.1 μg/m3 (0) 25.0
 
May 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -0.1 μg/m3 (0) N/A
May 18, 2019, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A -0.8 μg/m3 (0) 25.0
 
May 18, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A -1.2 μg/m3 (0) 23.0
 
May 18, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A -0.9 μg/m3 (0) 24.0
 
May 18, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A -0.2 μg/m3 (0) 25.0
 
May 18, 2019, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 0.3 μg/m3 (1) 26.0
 
May 18, 2019, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 0.5 μg/m3 (2) 26.0
 
May 18, 2019, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 0.5 μg/m3 (2) 26.0
 
May 18, 2019, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 0.8 μg/m3 (3) 27.0
 
May 18, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 1.0 μg/m3 (4) 28.0
 
May 18, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 1.0 μg/m3 (4) 31.0
 
May 17, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 1.0 μg/m3 (4) 32.0
 
May 17, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 1.8 μg/m3 (8) 32.0
 
May 17, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
May 17, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 1.8 μg/m3 (8) 27.0
 
May 17, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 2.6 μg/m3 (11) 27.0
 
May 17, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
May 17, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 2.4 μg/m3 (10) 25.0
 
May 17, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 2.3 μg/m3 (10) 26.0
 
May 17, 2019, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 0.4 μg/m3 (2) 25.0
 
May 17, 2019, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 1.1 μg/m3 (5) 22.0
 
May 17, 2019, noon N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 1.6 μg/m3 (7) 19.0
 
May 17, 2019, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 1.7 μg/m3 (7) 19.0
 
May 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (3) 3.0
 
May 17, 2019, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 0.9 μg/m3 (4) 22.0
 
May 17, 2019, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 0.7 μg/m3 (3) 21.0
 
May 17, 2019, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 0.0 μg/m3 (0) 22.0
 
May 17, 2019, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A -0.5 μg/m3 (0) 22.0
 
May 17, 2019, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 0.0 μg/m3 (0) 22.0
 
May 17, 2019, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 0.4 μg/m3 (2) 22.0
 
May 17, 2019, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 1.8 μg/m3 (8) 24.0
 
May 17, 2019, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 1.0 μg/m3 (4) 26.0
 
May 17, 2019, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 0.8 μg/m3 (3) 28.0
 
May 17, 2019, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A -0.3 μg/m3 (0) 29.0
 
May 16, 2019, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A -0.5 μg/m3 (0) 30.0
 
May 16, 2019, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A -0.4 μg/m3 (0) 29.0
 
May 16, 2019, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A -0.9 μg/m3 (0) 27.0
 
May 16, 2019, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A -1.2 μg/m3 (0) 26.0
 
May 16, 2019, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A -0.3 μg/m3 (0) 25.0
 
May 16, 2019, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 0.7 μg/m3 (3) 24.0
 
May 16, 2019, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 0.5 μg/m3 (2) 23.0
 
May 16, 2019, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A -0.3 μg/m3 (0) 22.0