AQSQID: 061112002

Site Name: Simi Valley - Cochran Street

Location: Simi Valley, CA

Reporting: True, Located: True

Current AQI: 30.0

Simi Valley CA, US: 34.2775, -118.6847

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 18, 2019, 6 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) 3.0 μg/m3 (12) 30.0
 
Jan. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 26.0
 
Jan. 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 12.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 16.0 μg/m3 (15) 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 4.0 ppb (3) N/A 12.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 13.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 11 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) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 24.0 μg/m3 (22) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 21.0 μg/m3 (19) 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 22.0 μg/m3 (20) 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 25.0 μg/m3 (23) 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 27.0 μg/m3 (25) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 26.0 μg/m3 (24) 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 19.0 μg/m3 (17) 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 21.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 26.0
 
Jan. 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 15.0 μg/m3 (14) 4.0 μg/m3 (17) 25.0
 
Jan. 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 26.0
 
Jan. 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 26.0
 
Jan. 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A -2.0 μg/m3 (0) 4.0 μg/m3 (17) 25.0
 
Jan. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 1.0 μg/m3 (1) 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 23.0
 
Jan. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -2.0 μg/m3 (0) 2.0 μg/m3 (8) 22.0
 
Jan. 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -2.0 μg/m3 (0) 3.0 μg/m3 (12) 22.0
 
Jan. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A -3.0 μg/m3 (0) 2.0 μg/m3 (8) 24.0
 
Jan. 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A -3.0 μg/m3 (0) 1.0 μg/m3 (4) 26.0
 
Jan. 17, 2019, 1 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) 1.0 μg/m3 (4) 27.0
 
Jan. 17, 2019, noon N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (4) 28.0
 
Jan. 17, 2019, 11 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) 0.0 μg/m3 (0) 28.0
 
Jan. 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 0.0 μg/m3 (0) 2.0 μg/m3 (8) 29.0
 
Jan. 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A -2.0 μg/m3 (0) 2.0 μg/m3 (8) 22.0
 
Jan. 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 0.0 μg/m3 (0) 3.0 μg/m3 (12) 19.0
 
Jan. 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 5 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) 2.0 μg/m3 (8) 16.0
 
Jan. 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (8) 18.0
 
Jan. 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 1.0 μg/m3 (1) 4.0 μg/m3 (17) 18.0
 
Jan. 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (8) 19.0
 
Jan. 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 18.0
 
Jan. 17, 2019, midnight N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (12) 18.0
 
Jan. 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A -4.0 μg/m3 (0) 4.0 μg/m3 (17) 20.0
 
Jan. 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 0.0 μg/m3 (0) 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 21.0
 
Jan. 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 19.0
 
Jan. 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 1.0 μg/m3 (1) 1.0 μg/m3 (4) 17.0
 
Jan. 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 2.0 μg/m3 (2) 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 2.0 μg/m3 (2) 5.0 μg/m3 (21) 22.0
 
Jan. 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 21.0
 
Jan. 16, 2019, 3 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. 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 6.0 μg/m3 (5) 0.0 μg/m3 (0) 8.0
 
Jan. 16, 2019, 1 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) -1.0 μg/m3 (0) 25.0
 
Jan. 16, 2019, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 7.0 μg/m3 (6) 0.0 μg/m3 (0) 25.0
 
Jan. 16, 2019, 11 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) 1.0 μg/m3 (4) 25.0
 
Jan. 16, 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) 4.0 μg/m3 (17) 25.0
 
Jan. 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 28.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 29.0
 
Jan. 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 2.0 μg/m3 (2) -4.0 μg/m3 (0) 29.0
 
Jan. 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 2.0 μg/m3 (2) -2.0 μg/m3 (0) 31.0
 
Jan. 16, 2019, 4 a.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. 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 30.0
 
Jan. 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 30.0
 
Jan. 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
Jan. 16, 2019, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 12.0 μg/m3 (11) 5.0 μg/m3 (21) 28.0
 
Jan. 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 7.0 μg/m3 (6) 7.0 μg/m3 (29) 31.0
 
Jan. 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 29.0
 
Jan. 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 30.0
 
Jan. 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
Jan. 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 30.0
 
Jan. 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
Jan. 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 21.0
 
Jan. 15, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 22.0
 
Jan. 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 22.0
 
Jan. 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
Jan. 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
Jan. 15, 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) 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 1.0 μg/m3 (1) 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 2.0 μg/m3 (2) 3.0 μg/m3 (12) 22.0
 
Jan. 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) -1.0 μg/m3 (0) 25.0
 
Jan. 14, 2019, 10 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) 2.0 μg/m3 (8) 28.0
 
Jan. 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 26.0
 
Jan. 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 2.0 μg/m3 (2) 4.0 μg/m3 (17) 28.0
 
Jan. 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (12) 29.0
 
Jan. 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 31.0
 
Jan. 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 32.0
 
Jan. 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 28.0
 
Jan. 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 24.0
 
Jan. 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Jan. 14, 2019, 1 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) 3.0 μg/m3 (12) 24.0
 
Jan. 14, 2019, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 2.0 μg/m3 (2) 4.0 μg/m3 (17) 27.0
 
Jan. 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 26.0
 
Jan. 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 8.0 μg/m3 (7) 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 14.0 μg/m3 (13) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 15.0 μg/m3 (14) 14.0 μg/m3 (54) 54.0
 
Jan. 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 16.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 13.0 μg/m3 (12) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 9.0 μg/m3 (8) 4.0 μg/m3 (17) 28.0
 
Jan. 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 28.0
 
Jan. 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
Jan. 13, 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) 3.0 μg/m3 (12) 28.0
 
Jan. 13, 2019, 7 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) 1.0 μg/m3 (4) 29.0
 
Jan. 13, 2019, 6 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) -1.0 μg/m3 (0) 29.0
 
Jan. 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 7.0 μg/m3 (6) 1.0 μg/m3 (4) 18.0
 
Jan. 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 12.0
 
Jan. 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 12.0
 
Jan. 13, 2019, noon N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
Jan. 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 2.0 μg/m3 (2) 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 12.0
 
Jan. 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 0.0 μg/m3 (0) 22.0
 
Jan. 13, 2019, 7 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) 1.0 μg/m3 (4) 28.0
 
Jan. 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (12) 30.0
 
Jan. 13, 2019, 5 a.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. 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 1.0 μg/m3 (1) 4.0 μg/m3 (17) 30.0
 
Jan. 13, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
Jan. 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 27.0
 
Jan. 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 26.0
 
Jan. 13, 2019, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 26.0
 
Jan. 12, 2019, 11 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. 12, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 29.0
 
Jan. 12, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 4.0 μg/m3 (4) 6.0 μg/m3 (25) 28.0
 
Jan. 12, 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) 2.0 μg/m3 (8) 28.0
 
Jan. 12, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 27.0
 
Jan. 12, 2019, 6 p.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. 12, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 28.0
 
Jan. 12, 2019, 4 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. 12, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 0.0 μg/m3 (0) -1.0 μg/m3 (0) 29.0
 
Jan. 12, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A -1.0 μg/m3 (0) 1.0 μg/m3 (4) 30.0
 
Jan. 12, 2019, 1 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) 2.0 μg/m3 (8) 31.0
 
Jan. 12, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (8) 33.0
 
Jan. 12, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 32.0
 
Jan. 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 31.0
 
Jan. 12, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 8.0 μg/m3 (33) 33.0
 
Jan. 12, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 27.0 μg/m3 (25) 19.0 μg/m3 (65) 65.0
 
Jan. 12, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 26.0 μg/m3 (24) 16.0 μg/m3 (59) 59.0
 
Jan. 12, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 20.0 μg/m3 (18) 16.0 μg/m3 (59) 59.0
 
Jan. 12, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 30.0 μg/m3 (27) 19.0 μg/m3 (65) 65.0
 
Jan. 12, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 49.0 μg/m3 (45) 34.0 μg/m3 (97) 97.0
 
Jan. 12, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 62.0 μg/m3 (54) 41.0 μg/m3 (114) 114.0
 
Jan. 12, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A 54.0 μg/m3 (49) 32.0 μg/m3 (93) 93.0
 
Jan. 12, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 27.0 μg/m3 (25) 15.0 μg/m3 (56) 56.0
 
Jan. 12, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 27.0 μg/m3 (25) 10.0 μg/m3 (42) 42.0
 
Jan. 11, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 24.0 μg/m3 (22) 12.0 μg/m3 (50) 50.0
 
Jan. 11, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 34.0 μg/m3 (31) 13.0 μg/m3 (52) 52.0
 
Jan. 11, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 32.0 μg/m3 (29) 20.0 μg/m3 (67) 67.0
 
Jan. 11, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 34.0 μg/m3 (31) 17.0 μg/m3 (61) 61.0
 
Jan. 11, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 29.0 μg/m3 (26) 15.0 μg/m3 (56) 56.0