AQSQID: 000030310

Site Name: Sydney

Location: Sydney (Welton St), CC

Reporting: True, Located: True

Current AQI: 35.0

Sydney (Welton St) CC, CA: 46.1425, -60.1728

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 1 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 7.0 μg/m3 (29) 35.0
 
March 23, 2019, noon N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 7.0 μg/m3 (29) 34.0
 
March 23, 2019, 11 a.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 23, 2019, 10 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 1.0 μg/m3 (4) 35.0
 
March 23, 2019, 9 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 3.0 μg/m3 (12) 36.0
 
March 23, 2019, 8 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 3.0 μg/m3 (12) 37.0
 
March 23, 2019, 7 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) N/A N/A 2.0 μg/m3 (8) 38.0
 
March 23, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 1.0 μg/m3 (4) 38.0
 
March 23, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 1.0 μg/m3 (4) 38.0
 
March 23, 2019, 4 a.m. N/A 0.0 ppb (0) 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
 
March 23, 2019, 3 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 23, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 23, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
March 23, 2019, midnight N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
March 22, 2019, 11 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
March 22, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 22, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 22, 2019, 8 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 8.0 μg/m3 (33) 36.0
 
March 22, 2019, 5 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 8.0 μg/m3 (33) 36.0
 
March 22, 2019, 4 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 3 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 2 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 1 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 7.0 μg/m3 (29) 35.0
 
March 22, 2019, noon N/A 2.0 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 22, 2019, 11 a.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 0.0 μg/m3 (0) 34.0
 
March 22, 2019, 10 a.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 0.0 μg/m3 (0) 33.0
 
March 22, 2019, 9 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 3.0 μg/m3 (12) 33.0
 
March 22, 2019, 8 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 22, 2019, 7 a.m. N/A 0.0 ppb (0) 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
 
March 22, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 22, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
March 22, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
March 22, 2019, 3 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
March 22, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 8.0 μg/m3 (33) 34.0
 
March 22, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 22, 2019, midnight N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 21, 2019, 11 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 21, 2019, 10 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 21, 2019, 9 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 21, 2019, 8 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 21, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 21, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 8.0 μg/m3 (33) 36.0
 
March 21, 2019, 5 p.m. N/A 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 21, 2019, 4 p.m. N/A 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 21, 2019, 3 p.m. N/A 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 21, 2019, 2 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) N/A N/A 7.0 μg/m3 (29) 33.0
 
March 21, 2019, 1 p.m. N/A 2.0 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 42.0 ppb (32) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, noon N/A 2.0 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 42.0 ppb (32) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 11 a.m. N/A 4.0 ppb (4) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 10 a.m. N/A 3.0 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 9 a.m. N/A 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
March 21, 2019, 8 a.m. N/A 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 7 a.m. N/A 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
March 21, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
March 21, 2019, 3 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 1 a.m. N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 21, 2019, midnight N/A 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 11 p.m. N/A 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 20, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
March 20, 2019, 8 p.m. N/A 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 20, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 5.0 μg/m3 (21) 34.0
 
March 20, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 3.0 μg/m3 (12) 34.0
 
March 20, 2019, 5 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 20, 2019, 4 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
March 20, 2019, 3 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
March 20, 2019, 2 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 20, 2019, 1 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A N/A 31.0
 
March 20, 2019, noon N/A 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) N/A N/A N/A 25.0
 
March 20, 2019, 11 a.m. N/A 9.0 ppb (8) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 15.0 ppb (12) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 10 a.m. N/A 3.0 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 20, 2019, 9 a.m. N/A 2.0 ppb (2) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 8 a.m. N/A 1.0 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 20, 2019, 7 a.m. N/A 1.0 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 3 a.m. N/A 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 4.0 μg/m3 (17) 23.0
 
March 20, 2019, midnight N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 4.0 μg/m3 (17) 27.0
 
March 19, 2019, 11 p.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 5.0 μg/m3 (21) 27.0
 
March 19, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
March 19, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 6.0 μg/m3 (25) 30.0
 
March 19, 2019, 8 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 19, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 7.0 μg/m3 (29) 32.0
 
March 19, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 2.0 μg/m3 (8) 32.0
 
March 19, 2019, 5 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 19, 2019, 4 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
March 19, 2019, 3 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
March 19, 2019, 2 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 3.0 μg/m3 (12) 31.0
 
March 19, 2019, 1 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 5.0 μg/m3 (21) 30.0
 
March 19, 2019, noon N/A 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 11 a.m. N/A 5.0 ppb (5) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 10 a.m. N/A 4.0 ppb (4) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 9 a.m. N/A 2.0 ppb (2) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 8 a.m. N/A 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 4.0 μg/m3 (17) 24.0
 
March 19, 2019, 7 a.m. N/A 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 4.0 μg/m3 (17) 25.0
 
March 19, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 3 a.m. N/A 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 19, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 2.0 μg/m3 (8) 32.0
 
March 19, 2019, 1 a.m. N/A -1.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 19, 2019, midnight N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 3.0 μg/m3 (12) 31.0
 
March 18, 2019, 11 p.m. N/A -1.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 4.0 μg/m3 (17) 31.0
 
March 18, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
March 18, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 7.0 μg/m3 (29) 35.0
 
March 18, 2019, 8 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 18, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 18, 2019, 6 p.m. N/A 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 18, 2019, 5 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
March 18, 2019, 4 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 3 p.m. N/A 2.0 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 18, 2019, 2 p.m. N/A 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 18, 2019, 1 p.m. N/A 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, noon N/A 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 11 a.m. N/A 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 10 a.m. N/A 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 5.0 μg/m3 (21) 28.0
 
March 18, 2019, 9 a.m. N/A 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 2.0 μg/m3 (8) 28.0
 
March 18, 2019, 8 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 5.0 μg/m3 (21) 30.0
 
March 18, 2019, 7 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
March 18, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 4.0 μg/m3 (17) 31.0
 
March 18, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 3.0 μg/m3 (12) 30.0
 
March 18, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 18, 2019, 3 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 18, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 18, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 18, 2019, midnight N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
March 17, 2019, 11 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 7.0 μg/m3 (29) 34.0
 
March 17, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 17, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 17, 2019, 8 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 17, 2019, 7 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
March 17, 2019, 6 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 17, 2019, 5 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 17, 2019, 4 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 17, 2019, 3 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 17, 2019, 2 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
March 17, 2019, 1 p.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 3.0 μg/m3 (12) 34.0
 
March 17, 2019, noon N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 17, 2019, 11 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
March 17, 2019, 10 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 4.0 μg/m3 (17) 32.0
 
March 17, 2019, 9 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
March 17, 2019, 8 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 5.0 μg/m3 (21) 30.0
 
March 17, 2019, 7 a.m. N/A -1.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
March 17, 2019, 6 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 2.0 μg/m3 (8) 28.0
 
March 17, 2019, 5 a.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 1.0 μg/m3 (4) 26.0
 
March 17, 2019, 4 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 4.0 μg/m3 (17) 24.0
 
March 17, 2019, 3 a.m. N/A 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 2 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 2.0 μg/m3 (8) 25.0
 
March 17, 2019, 1 a.m. N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 3.0 μg/m3 (12) 27.0
 
March 17, 2019, midnight N/A 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 16, 2019, 11 p.m. N/A 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 3.0 μg/m3 (12) 28.0
 
March 16, 2019, 10 p.m. N/A 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 16, 2019, 9 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 8.0 μg/m3 (33) 34.0
 
March 16, 2019, 8 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 16, 2019, 7 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 2.0 μg/m3 (8) 35.0
 
March 16, 2019, 6 p.m. N/A 1.0 ppb (1) 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
 
March 16, 2019, 5 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 1.0 μg/m3 (4) 35.0
 
March 16, 2019, 4 p.m. N/A 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 1.0 μg/m3 (4) 36.0
 
March 16, 2019, 3 p.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A 0.0 μg/m3 (0) 38.0
 
March 16, 2019, 2 p.m. N/A 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) N/A N/A -1.0 μg/m3 (0) 38.0