ID: 245

AQSQID: 061112002

Site Name: Simi Valley - Cochran Street

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

Updated: Feb. 28, 2021, 6:32 a.m.

Location: Simi Valley (Simi Valley High School), CA

Reporting: True, Located: True

Current AQI: 42.0

Simi Valley (Simi Valley High School) CA, US: 34.2775, -118.6847

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 45.0 μg/m3 (42) 5.0 μg/m3 (21) 42.0
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 29.0 μg/m3 (27) 2.0 μg/m3 (9) 43.0
 
Feb. 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 26.0 μg/m3 (25) 2.0 μg/m3 (9) 43.0
 
Feb. 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 28.0 μg/m3 (26) 2.0 μg/m3 (9) 44.0
 
Feb. 28, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 24.0 μg/m3 (23) 2.0 μg/m3 (9) 43.0
 
Feb. 28, 2021, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 19.0 μg/m3 (18) 3.0 μg/m3 (13) 43.0
 
Feb. 27, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 14.0 μg/m3 (13) 1.0 μg/m3 (5) 44.0
 
Feb. 27, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 13.0 μg/m3 (13) 1.0 μg/m3 (5) 45.0
 
Feb. 27, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 8.0 μg/m3 (8) 2.0 μg/m3 (9) 44.0
 
Feb. 27, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 43.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 14.0 μg/m3 (13) 4.0 μg/m3 (17) 43.0
 
Feb. 27, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 14.0 μg/m3 (13) 5.0 μg/m3 (21) 42.0
 
Feb. 27, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (13) 40.0
 
Feb. 27, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 18.0 μg/m3 (17) 5.0 μg/m3 (21) 38.0
 
Feb. 27, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 21.0 μg/m3 (20) 7.0 μg/m3 (30) 38.0
 
Feb. 27, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 19.0 μg/m3 (18) 6.0 μg/m3 (25) 42.0
 
Feb. 27, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 31.0 μg/m3 (29) 6.0 μg/m3 (25) 44.0
 
Feb. 27, 2021, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 17.0 μg/m3 (16) 3.0 μg/m3 (13) 41.0
 
Feb. 27, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 14.0 μg/m3 (13) 4.0 μg/m3 (17) 42.0
 
Feb. 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 13.0 μg/m3 (13) 4.0 μg/m3 (17) 38.0
 
Feb. 27, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Feb. 27, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
Feb. 27, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 33.0 μg/m3 (31) 15.0 μg/m3 (58) 58.0
 
Feb. 27, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 29.0 μg/m3 (27) 14.0 μg/m3 (55) 55.0
 
Feb. 27, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 33.0 μg/m3 (31) 17.0 μg/m3 (62) 62.0
 
Feb. 27, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 31.0 μg/m3 (29) 11.0 μg/m3 (46) 46.0
 
Feb. 27, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 18.0 μg/m3 (17) 13.0 μg/m3 (53) 53.0
 
Feb. 27, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 31.0 μg/m3 (29) 10.0 μg/m3 (42) 42.0
 
Feb. 27, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 17.0 μg/m3 (16) 5.0 μg/m3 (21) 46.0
 
Feb. 27, 2021, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 21.0 μg/m3 (20) 5.0 μg/m3 (21) 46.0
 
Feb. 26, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A 19.0 μg/m3 (18) 6.0 μg/m3 (25) 48.0
 
Feb. 26, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 22.0 μg/m3 (21) 6.0 μg/m3 (25) 47.0
 
Feb. 26, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 30.0 μg/m3 (28) 5.0 μg/m3 (21) 47.0
 
Feb. 26, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 22.0 μg/m3 (21) 2.0 μg/m3 (9) 45.0
 
Feb. 26, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 17.0 μg/m3 (16) 1.0 μg/m3 (5) 42.0
 
Feb. 26, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 42.0
 
Feb. 26, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 7.0 μg/m3 (7) 3.0 μg/m3 (13) 43.0
 
Feb. 26, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 18.0 μg/m3 (17) 4.0 μg/m3 (17) 38.0
 
Feb. 26, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 16.0 μg/m3 (15) 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 15.0 μg/m3 (14) 8.0 μg/m3 (34) 34.0
 
Feb. 26, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 19.0 μg/m3 (18) 4.0 μg/m3 (17) 39.0
 
Feb. 26, 2021, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 12.0 μg/m3 (12) 5.0 μg/m3 (21) 41.0
 
Feb. 26, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 12.0 μg/m3 (12) 4.0 μg/m3 (17) 43.0
 
Feb. 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 16.0 μg/m3 (15) 3.0 μg/m3 (13) 42.0
 
Feb. 26, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 2.0 μg/m3 (9) 14.0
 
Feb. 26, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 15.0 μg/m3 (14) 1.0 μg/m3 (5) 41.0
 
Feb. 26, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 42.0
 
Feb. 26, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 42.0
 
Feb. 26, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 41.0
 
Feb. 26, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 13.0 μg/m3 (13) 2.0 μg/m3 (9) 33.0
 
Feb. 26, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 38.0
 
Feb. 26, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 8.0 μg/m3 (8) -1.0 μg/m3 (0) 42.0
 
Feb. 26, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 11.0 μg/m3 (11) -1.0 μg/m3 (0) 43.0
 
Feb. 26, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (12) 0.0 μg/m3 (0) 12.0
 
Feb. 25, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 13.0 μg/m3 (13) 1.0 μg/m3 (5) 44.0
 
Feb. 25, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 22.0 μg/m3 (21) 3.0 μg/m3 (13) 44.0
 
Feb. 25, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 19.0 μg/m3 (18) 3.0 μg/m3 (13) 44.0
 
Feb. 25, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 25.0 μg/m3 (24) 4.0 μg/m3 (17) 44.0
 
Feb. 25, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 35.0 μg/m3 (33) 3.0 μg/m3 (13) 44.0
 
Feb. 25, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 31.0 μg/m3 (29) 3.0 μg/m3 (13) 44.0
 
Feb. 25, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 43.0 μg/m3 (40) 2.0 μg/m3 (9) 44.0
 
Feb. 25, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 44.0 μg/m3 (41) 5.0 μg/m3 (21) 46.0
 
Feb. 25, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 56.0 μg/m3 (52) 7.0 μg/m3 (30) 52.0
 
Feb. 25, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 71.0 μg/m3 (59) 5.0 μg/m3 (21) 59.0
 
Feb. 25, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 102.0 μg/m3 (75) 8.0 μg/m3 (34) 75.0
 
Feb. 25, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 166.0 μg/m3 (107) 14.0 μg/m3 (55) 107.0
 
Feb. 25, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 195.0 μg/m3 (121) 17.0 μg/m3 (62) 121.0
 
Feb. 25, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 301.0 μg/m3 (174) 28.0 μg/m3 (85) 174.0
 
Feb. 25, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 126.0 μg/m3 (87) 11.0 μg/m3 (46) 87.0
 
Feb. 25, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 51.0 μg/m3 (48) 8.0 μg/m3 (34) 48.0
 
Feb. 25, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 29.0 μg/m3 (27) 8.0 μg/m3 (34) 45.0
 
Feb. 25, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 22.0 μg/m3 (21) 6.0 μg/m3 (25) 45.0
 
Feb. 25, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 29.0 μg/m3 (27) 8.0 μg/m3 (34) 44.0
 
Feb. 25, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 29.0 μg/m3 (27) 11.0 μg/m3 (46) 46.0
 
Feb. 25, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 27.0 μg/m3 (25) 11.0 μg/m3 (46) 46.0
 
Feb. 25, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 24.0 μg/m3 (23) 10.0 μg/m3 (42) 50.0
 
Feb. 25, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A 21.0 μg/m3 (20) 7.0 μg/m3 (30) 58.0
 
Feb. 25, 2021, midnight N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A 29.0 μg/m3 (27) 10.0 μg/m3 (42) 61.0
 
Feb. 24, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A 26.0 μg/m3 (25) 9.0 μg/m3 (38) 58.0
 
Feb. 24, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A 29.0 μg/m3 (27) 9.0 μg/m3 (38) 51.0
 
Feb. 24, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A 29.0 μg/m3 (27) 2.0 μg/m3 (9) 50.0
 
Feb. 24, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A 12.0 μg/m3 (12) 4.0 μg/m3 (17) 51.0
 
Feb. 24, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 9.0 μg/m3 (9) 6.0 μg/m3 (25) 47.0
 
Feb. 24, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 11.0 μg/m3 (11) 4.0 μg/m3 (17) 45.0
 
Feb. 24, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 12.0 μg/m3 (12) 6.0 μg/m3 (25) 41.0
 
Feb. 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 19.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
Feb. 24, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 30.0 μg/m3 (28) 10.0 μg/m3 (42) 42.0
 
Feb. 24, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 23.0 μg/m3 (22) 11.0 μg/m3 (46) 46.0
 
Feb. 24, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 19.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
Feb. 24, 2021, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 16.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
Feb. 24, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 17.0 μg/m3 (16) 11.0 μg/m3 (46) 46.0
 
Feb. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 18.0 μg/m3 (17) 10.0 μg/m3 (42) 42.0
 
Feb. 24, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (25) 5.0 μg/m3 (21) 25.0
 
Feb. 24, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 18.0 μg/m3 (17) 7.0 μg/m3 (30) 30.0
 
Feb. 24, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 19.0 μg/m3 (18) 10.0 μg/m3 (42) 42.0
 
Feb. 24, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 22.0 μg/m3 (21) 6.0 μg/m3 (25) 25.0
 
Feb. 24, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 18.0 μg/m3 (17) 8.0 μg/m3 (34) 34.0
 
Feb. 24, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 21.0 μg/m3 (20) 4.0 μg/m3 (17) 20.0
 
Feb. 24, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 28.0
 
Feb. 24, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (13) 36.0
 
Feb. 24, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 12.0 μg/m3 (12) 1.0 μg/m3 (5) 41.0
 
Feb. 24, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 42.0
 
Feb. 23, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 17.0 μg/m3 (16) 3.0 μg/m3 (13) 42.0
 
Feb. 23, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 3.0 μg/m3 (3) -2.0 μg/m3 (0) 42.0
 
Feb. 23, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 2.0 μg/m3 (2) -3.0 μg/m3 (0) 42.0
 
Feb. 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 3.0 μg/m3 (3) -3.0 μg/m3 (0) 40.0
 
Feb. 23, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 1.0 μg/m3 (1) -2.0 μg/m3 (0) 40.0
 
Feb. 23, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 3.0 μg/m3 (3) -1.0 μg/m3 (0) 39.0
 
Feb. 23, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 0.0 μg/m3 (0) 35.0
 
Feb. 23, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 16.0
 
Feb. 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 17.0 μg/m3 (16) 4.0 μg/m3 (17) 17.0
 
Feb. 23, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 13.0
 
Feb. 23, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (13) 13.0
 
Feb. 23, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (9) 16.0
 
Feb. 23, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 17.0
 
Feb. 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 2.0 μg/m3 (2) 0.0 μg/m3 (0) 21.0
 
Feb. 23, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 9.0
 
Feb. 23, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 7.0 μg/m3 (7) 4.0 μg/m3 (17) 30.0
 
Feb. 23, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 11.0 μg/m3 (11) 1.0 μg/m3 (5) 32.0
 
Feb. 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 7.0 μg/m3 (7) 1.0 μg/m3 (5) 34.0
 
Feb. 23, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (13) 34.0
 
Feb. 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (5) 38.0
 
Feb. 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 7.0 μg/m3 (7) -1.0 μg/m3 (0) 39.0
 
Feb. 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 4.0 μg/m3 (4) -1.0 μg/m3 (0) 40.0
 
Feb. 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 3.0 μg/m3 (3) -3.0 μg/m3 (0) 40.0
 
Feb. 23, 2021, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 5.0 μg/m3 (5) -1.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 9.0 μg/m3 (9) 0.0 μg/m3 (0) 41.0
 
Feb. 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 10.0 μg/m3 (10) -1.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 7.0 μg/m3 (7) -1.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 10.0 μg/m3 (10) 1.0 μg/m3 (5) 39.0
 
Feb. 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 17.0 μg/m3 (16) 0.0 μg/m3 (0) 39.0
 
Feb. 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 16.0 μg/m3 (15) -3.0 μg/m3 (0) 39.0
 
Feb. 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 15.0 μg/m3 (14) -2.0 μg/m3 (0) 39.0
 
Feb. 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 8.0 μg/m3 (8) -2.0 μg/m3 (0) 38.0
 
Feb. 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 6.0 μg/m3 (6) -2.0 μg/m3 (0) 38.0
 
Feb. 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 4.0 μg/m3 (4) -1.0 μg/m3 (0) 39.0
 
Feb. 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 5.0 μg/m3 (5) -1.0 μg/m3 (0) 39.0
 
Feb. 22, 2021, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 5.0 μg/m3 (5) -2.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 7.0 μg/m3 (7) -1.0 μg/m3 (0) 40.0
 
Feb. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 41.0
 
Feb. 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 9.0
 
Feb. 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 7.0 μg/m3 (7) 1.0 μg/m3 (5) 42.0
 
Feb. 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 43.0
 
Feb. 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (13) 43.0
 
Feb. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 43.0
 
Feb. 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 43.0
 
Feb. 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 42.0
 
Feb. 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 42.0
 
Feb. 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 6.0 μg/m3 (6) -1.0 μg/m3 (0) 41.0
 
Feb. 22, 2021, midnight N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 42.0
 
Feb. 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 43.0
 
Feb. 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 6.0 μg/m3 (6) -1.0 μg/m3 (0) 43.0
 
Feb. 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 43.0
 
Feb. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A 13.0 μg/m3 (13) 2.0 μg/m3 (9) 42.0
 
Feb. 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 16.0 μg/m3 (15) 2.0 μg/m3 (9) 41.0
 
Feb. 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A 9.0 μg/m3 (9) 0.0 μg/m3 (0) 41.0
 
Feb. 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 8.0 μg/m3 (8) -2.0 μg/m3 (0) 40.0
 
Feb. 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 11.0 μg/m3 (11) 1.0 μg/m3 (5) 39.0
 
Feb. 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 15.0 μg/m3 (14) 4.0 μg/m3 (17) 38.0
 
Feb. 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 7.0 μg/m3 (7) 4.0 μg/m3 (17) 38.0
 
Feb. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 10.0 μg/m3 (10) 5.0 μg/m3 (21) 38.0
 
Feb. 21, 2021, noon N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 9.0 μg/m3 (9) 5.0 μg/m3 (21) 39.0
 
Feb. 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 11.0 μg/m3 (11) 8.0 μg/m3 (34) 38.0
 
Feb. 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 9.0 μg/m3 (9) 7.0 μg/m3 (30) 38.0
 
Feb. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 13.0
 
Feb. 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 12.0 μg/m3 (12) -1.0 μg/m3 (0) 38.0
 
Feb. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 15.0 μg/m3 (14) 3.0 μg/m3 (13) 38.0
 
Feb. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 15.0 μg/m3 (14) 4.0 μg/m3 (17) 39.0