AQSQID: 060210003

Site Name: Willows-Colusa

Location: Willows, CA

Reporting: True, Located: True

Current AQI: 29.0

Willows CA, US: 39.533889, -122.190833

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 29.0
 
Jan. 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
Jan. 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 12.0
 
Jan. 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) N/A 15.0 μg/m3 (14) 4.0 μg/m3 (17) 17.0
 
Jan. 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 19.0 μg/m3 (17) 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A 17.0 μg/m3 (15) 14.0 μg/m3 (54) 54.0
 
Jan. 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A 21.0 μg/m3 (19) 21.0 μg/m3 (69) 69.0
 
Jan. 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 12.0 μg/m3 (11) 14.0 μg/m3 (54) 54.0
 
Jan. 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
Jan. 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 14.0
 
Jan. 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) -1.0 μg/m3 (0) 18.0
 
Jan. 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 20.0
 
Jan. 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 3.0 μg/m3 (12) 22.0
 
Jan. 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) 5.0 μg/m3 (21) 21.0
 
Jan. 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 19.0 μg/m3 (17) 0.0 μg/m3 (0) 17.0
 
Jan. 23, 2019, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 1.0 μg/m3 (1) -2.0 μg/m3 (0) 28.0
 
Jan. 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 30.0
 
Jan. 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 30.0
 
Jan. 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 29.0
 
Jan. 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 1.0 μg/m3 (4) 28.0
 
Jan. 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 27.0
 
Jan. 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 26.0
 
Jan. 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 25.0
 
Jan. 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 24.0
 
Jan. 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 25.0
 
Jan. 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 25.0
 
Jan. 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (8) 26.0
 
Jan. 22, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 22.0
 
Jan. 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 23.0
 
Jan. 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (4) 22.0
 
Jan. 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 23.0
 
Jan. 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (4) 24.0
 
Jan. 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 25.0
 
Jan. 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 21.0
 
Jan. 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 18.0
 
Jan. 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 16.0
 
Jan. 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 18.0
 
Jan. 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 21.0
 
Jan. 22, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 0.0 μg/m3 (0) -1.0 μg/m3 (0) 28.0
 
Jan. 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A -1.0 μg/m3 (0) -1.0 μg/m3 (0) 31.0
 
Jan. 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 0.0 μg/m3 (0) 3.0 μg/m3 (12) 31.0
 
Jan. 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 29.0
 
Jan. 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 28.0
 
Jan. 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 25.0
 
Jan. 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 23.0
 
Jan. 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 11.0
 
Jan. 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 12.0
 
Jan. 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 12.0 μg/m3 (11) 2.0 μg/m3 (8) 11.0
 
Jan. 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 8.0 μg/m3 (7) 1.0 μg/m3 (4) 8.0
 
Jan. 21, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 8.0
 
Jan. 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (4) 22.0
 
Jan. 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 1.0 μg/m3 (4) 25.0
 
Jan. 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 20.0
 
Jan. 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 18.0
 
Jan. 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 22.0
 
Jan. 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 25.0
 
Jan. 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) -1.0 μg/m3 (0) 30.0
 
Jan. 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) -1.0 μg/m3 (0) 28.0
 
Jan. 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 2.0 μg/m3 (2) -2.0 μg/m3 (0) 32.0
 
Jan. 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 2.0 μg/m3 (2) -2.0 μg/m3 (0) 32.0
 
Jan. 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 1.0 μg/m3 (1) -1.0 μg/m3 (0) 34.0
 
Jan. 21, 2019, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 0.0 μg/m3 (0) 2.0 μg/m3 (8) 34.0
 
Jan. 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A -1.0 μg/m3 (0) 4.0 μg/m3 (17) 35.0
 
Jan. 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 0.0 μg/m3 (0) 3.0 μg/m3 (12) 33.0
 
Jan. 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 1.0 μg/m3 (1) 1.0 μg/m3 (4) 33.0
 
Jan. 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 32.0
 
Jan. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 2.0 μg/m3 (2) N/A 25.0
 
Jan. 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) N/A 18.0
 
Jan. 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) N/A 15.0
 
Jan. 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 15.0 μg/m3 (14) 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 15.0 μg/m3 (14) 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 14.0 μg/m3 (13) 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 12.0
 
Jan. 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 13.0
 
Jan. 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 30.0 μg/m3 (27) 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 14.0 μg/m3 (13) 5.0 μg/m3 (21) 27.0
 
Jan. 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 7.0 μg/m3 (29) 29.0
 
Jan. 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 18.0
 
Jan. 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
Jan. 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 15.0
 
Jan. 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 15.0
 
Jan. 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 15.0
 
Jan. 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 15.0
 
Jan. 19, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) 2.0 μg/m3 (8) 8.0
 
Jan. 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 12.0
 
Jan. 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 12.0
 
Jan. 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
Jan. 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 9.0 μg/m3 (8) 2.0 μg/m3 (8) 19.0
 
Jan. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 19.0
 
Jan. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 20.0
 
Jan. 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 19.0
 
Jan. 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 12.0 μg/m3 (11) 4.0 μg/m3 (17) 18.0
 
Jan. 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 13.0 μg/m3 (12) 3.0 μg/m3 (12) 19.0
 
Jan. 19, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 14.0 μg/m3 (13) 5.0 μg/m3 (21) 23.0
 
Jan. 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 18.0 μg/m3 (16) 5.0 μg/m3 (21) 27.0
 
Jan. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 14.0 μg/m3 (13) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 22.0
 
Jan. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 18.0
 
Jan. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 9.0 μg/m3 (8) N/A 8.0
 
Jan. 18, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 25.0
 
Jan. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 25.0
 
Jan. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 23.0
 
Jan. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 23.0
 
Jan. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 25.0
 
Jan. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 11.0 μg/m3 (10) 3.0 μg/m3 (12) 28.0
 
Jan. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 10.0 μg/m3 (9) 5.0 μg/m3 (21) 30.0
 
Jan. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 30.0
 
Jan. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 4.0 μg/m3 (4) -2.0 μg/m3 (0) 32.0
 
Jan. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 34.0
 
Jan. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 34.0
 
Jan. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 35.0
 
Jan. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 34.0
 
Jan. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (4) 34.0
 
Jan. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 33.0
 
Jan. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 33.0
 
Jan. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 32.0
 
Jan. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 12.0 μg/m3 (11) 5.0 μg/m3 (21) 32.0
 
Jan. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 18.0 μg/m3 (16) 6.0 μg/m3 (25) 31.0
 
Jan. 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 13.0 μg/m3 (12) 7.0 μg/m3 (29) 32.0
 
Jan. 17, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 13.0 μg/m3 (12) 3.0 μg/m3 (12) 32.0
 
Jan. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 32.0
 
Jan. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 32.0
 
Jan. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 32.0
 
Jan. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 25.0
 
Jan. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 27.0
 
Jan. 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 28.0
 
Jan. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 1.0 μg/m3 (4) 27.0
 
Jan. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 27.0
 
Jan. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 28.0
 
Jan. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (12) 28.0
 
Jan. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (8) 28.0
 
Jan. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (4) 30.0