AQSQID: 840060374010

Site Name: North Holywood

Location: N Hollywood (N Hollywood), CA

Reporting: True, Located: True

Current AQI: 43.0

N Hollywood (N Hollywood) CA, US: 34.181977, -118.363036

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 30, 2020, 9 a.m. 9.4 ppb (9) -0.7 ppb (0) N/A 10.0 ppb (9) N/A N/A 14.0 ppb (11) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 30, 2020, 8 a.m. 7.4 ppb (7) -0.7 ppb (0) N/A 8.0 ppb (7) N/A N/A 19.0 ppb (15) N/A N/A 12.3 μg/m3 (51) 51.0
 
March 30, 2020, 7 a.m. 7.9 ppb (7) -0.6 ppb (0) N/A 9.0 ppb (8) N/A N/A 20.0 ppb (15) N/A N/A 11.4 μg/m3 (48) 48.0
 
March 30, 2020, 6 a.m. 4.9 ppb (5) -0.9 ppb (0) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 30, 2020, 5 a.m. 4.4 ppb (4) -0.8 ppb (0) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 30, 2020, 4 a.m. 2.1 ppb (2) -0.9 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 10.5 μg/m3 (44) 44.0
 
March 30, 2020, 3 a.m. 1.1 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 9.5 μg/m3 (40) 40.0
 
March 30, 2020, 2 a.m. N/A -0.8 ppb (0) N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 30, 2020, 1 a.m. -0.3 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 30, 2020, midnight -0.6 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 7.8 μg/m3 (32) 38.0
 
March 29, 2020, 11 p.m. -0.4 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 9.7 μg/m3 (40) 40.0
 
March 29, 2020, 10 p.m. 0.2 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) N/A N/A 9.2 μg/m3 (38) 40.0
 
March 29, 2020, 9 p.m. 0.6 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 51.0 ppb (39) N/A N/A 7.3 μg/m3 (30) 39.0
 
March 29, 2020, 8 p.m. 0.9 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 29, 2020, 7 p.m. 1.7 ppb (2) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 13.3 μg/m3 (53) 53.0
 
March 29, 2020, 6 p.m. 1.6 ppb (1) -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 12.8 μg/m3 (52) 52.0
 
March 29, 2020, 5 p.m. 2.4 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 29, 2020, 4 p.m. 4.8 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) N/A N/A 15.9 μg/m3 (58) 58.0
 
March 29, 2020, 3 p.m. 10.0 ppb (9) 1.9 ppb (2) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 29, 2020, 2 p.m. 27.3 ppb (25) 10.8 ppb (10) N/A 16.0 ppb (15) N/A N/A 7.0 ppb (5) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 29, 2020, 1 p.m. 22.0 ppb (20) 3.5 ppb (3) N/A 19.0 ppb (18) N/A N/A 1.0 ppb (1) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 29, 2020, noon 22.4 ppb (21) 4.2 ppb (4) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 29, 2020, 11 a.m. 19.4 ppb (18) 1.6 ppb (1) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 29, 2020, 10 a.m. 17.7 ppb (16) 0.8 ppb (1) N/A 17.0 ppb (16) N/A N/A 3.0 ppb (2) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 29, 2020, 9 a.m. 14.5 ppb (13) -0.1 ppb (0) N/A 15.0 ppb (14) N/A N/A 9.0 ppb (7) N/A N/A 14.7 μg/m3 (56) 56.0
 
March 29, 2020, 8 a.m. 10.8 ppb (10) -0.5 ppb (0) N/A 11.0 ppb (10) N/A N/A 18.0 ppb (14) N/A N/A 15.5 μg/m3 (57) 57.0
 
March 29, 2020, 7 a.m. 10.2 ppb (9) -0.7 ppb (0) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) N/A N/A 12.6 μg/m3 (51) 51.0
 
March 29, 2020, 6 a.m. 8.5 ppb (8) -0.7 ppb (0) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) N/A N/A 11.6 μg/m3 (48) 48.0
 
March 29, 2020, 5 a.m. 4.9 ppb (5) -0.8 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 13.1 μg/m3 (52) 52.0
 
March 29, 2020, 4 a.m. 3.9 ppb (4) -0.8 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) N/A N/A 15.3 μg/m3 (57) 57.0
 
March 29, 2020, 3 a.m. 4.5 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 29, 2020, 2 a.m. 2.2 ppb (2) -0.8 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 5.5 μg/m3 (23) 34.0
 
March 29, 2020, 1 a.m. 0.4 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) N/A N/A 7.7 μg/m3 (32) 38.0
 
March 29, 2020, midnight 0.2 ppb (0) -0.8 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 28, 2020, 11 p.m. 1.0 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) N/A N/A 8.7 μg/m3 (36) 42.0
 
March 28, 2020, 10 p.m. 1.6 ppb (1) -0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) N/A N/A 8.8 μg/m3 (37) 41.0
 
March 28, 2020, 9 p.m. 2.0 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 7.5 μg/m3 (31) 38.0
 
March 28, 2020, 8 p.m. 2.2 ppb (2) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 6.8 μg/m3 (28) 37.0
 
March 28, 2020, 7 p.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 8.2 μg/m3 (34) 34.0
 
March 28, 2020, 6 p.m. 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 28, 2020, 5 p.m. 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 28, 2020, 4 p.m. 12.4 ppb (11) 3.1 ppb (3) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) N/A N/A 11.3 μg/m3 (47) 47.0
 
March 28, 2020, 3 p.m. 26.2 ppb (24) 8.6 ppb (8) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 28, 2020, 2 p.m. 30.0 ppb (28) 9.6 ppb (9) N/A 20.0 ppb (19) N/A N/A 9.0 ppb (7) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 28, 2020, 1 p.m. 27.7 ppb (26) 3.4 ppb (3) N/A 24.0 ppb (22) N/A N/A 2.0 ppb (2) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 28, 2020, noon 28.5 ppb (26) 6.3 ppb (6) N/A 22.0 ppb (20) N/A N/A 1.0 ppb (1) N/A N/A 9.3 μg/m3 (39) 39.0
 
March 28, 2020, 11 a.m. 20.6 ppb (19) 1.4 ppb (1) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) N/A N/A 9.6 μg/m3 (40) 40.0
 
March 28, 2020, 10 a.m. 21.2 ppb (20) 1.4 ppb (1) N/A 20.0 ppb (19) N/A N/A 3.0 ppb (2) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 28, 2020, 9 a.m. 19.4 ppb (18) 0.3 ppb (0) N/A 19.0 ppb (18) N/A N/A 4.0 ppb (3) N/A N/A 12.7 μg/m3 (51) 51.0
 
March 28, 2020, 8 a.m. 15.1 ppb (14) -0.2 ppb (0) N/A 15.0 ppb (14) N/A N/A 10.0 ppb (8) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 28, 2020, 7 a.m. 13.6 ppb (13) -0.5 ppb (0) N/A 14.0 ppb (13) N/A N/A 14.0 ppb (11) N/A N/A 15.2 μg/m3 (57) 57.0
 
March 28, 2020, 6 a.m. 13.2 ppb (12) -0.4 ppb (0) N/A 14.0 ppb (13) N/A N/A 13.0 ppb (10) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 28, 2020, 5 a.m. 9.6 ppb (9) -0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 23.0 ppb (18) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 28, 2020, 4 a.m. 4.4 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 28, 2020, 3 a.m. 2.3 ppb (2) -0.9 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 6.5 μg/m3 (27) 28.0
 
March 28, 2020, 2 a.m. 0.9 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A N/A 5.8 μg/m3 (24) 31.0
 
March 28, 2020, 1 a.m. 0.4 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 28, 2020, midnight -0.4 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 5.3 μg/m3 (22) 36.0
 
March 27, 2020, 11 p.m. -0.3 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 48.0 ppb (37) N/A N/A 3.1 μg/m3 (13) 37.0
 
March 27, 2020, 10 p.m. 0.0 ppb (0) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 3.6 μg/m3 (15) 36.0
 
March 27, 2020, 9 p.m. -0.1 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 3.1 μg/m3 (13) 36.0
 
March 27, 2020, 8 p.m. -0.3 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A 49.0 ppb (38) N/A N/A 3.3 μg/m3 (14) 38.0
 
March 27, 2020, 7 p.m. -0.4 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
March 27, 2020, 6 p.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 3.5 μg/m3 (15) 33.0
 
March 27, 2020, 5 p.m. 0.7 ppb (1) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 2.0 μg/m3 (8) 32.0
 
March 27, 2020, 4 p.m. 1.2 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 4.6 μg/m3 (19) 32.0
 
March 27, 2020, 3 p.m. 5.5 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 27, 2020, 2 p.m. 13.1 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 26.0 ppb (20) N/A N/A 6.3 μg/m3 (26) 26.0
 
March 27, 2020, 1 p.m. 9.7 ppb (9) -0.7 ppb (0) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) N/A N/A 19.3 μg/m3 (66) 66.0
 
March 27, 2020, noon 12.3 ppb (11) -0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 23.0 ppb (18) N/A N/A -0.9 μg/m3 (0) 18.0
 
March 27, 2020, 11 a.m. 5.5 ppb (5) -0.8 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) N/A N/A 4.8 μg/m3 (20) 23.0
 
March 27, 2020, 10 a.m. 4.1 ppb (4) -0.8 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 27, 2020, 9 a.m. 4.0 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 27, 2020, 8 a.m. 8.6 ppb (8) -0.7 ppb (0) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) N/A N/A 4.9 μg/m3 (20) 20.0
 
March 27, 2020, 7 a.m. 12.4 ppb (11) -0.7 ppb (0) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) N/A N/A 7.4 μg/m3 (31) 31.0
 
March 27, 2020, 6 a.m. 12.4 ppb (11) -0.7 ppb (0) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) N/A N/A 8.4 μg/m3 (35) 35.0
 
March 27, 2020, 5 a.m. 9.1 ppb (8) -0.8 ppb (0) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) N/A N/A 4.4 μg/m3 (18) 20.0
 
March 27, 2020, 4 a.m. 4.1 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) N/A N/A 4.5 μg/m3 (19) 26.0
 
March 27, 2020, 3 a.m. 4.0 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 27, 2020, 2 a.m. 1.9 ppb (2) -1.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) N/A N/A 4.5 μg/m3 (19) 32.0
 
March 27, 2020, 1 a.m. 0.8 ppb (1) -0.8 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) N/A N/A 4.3 μg/m3 (18) 33.0
 
March 27, 2020, midnight -0.3 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 3.1 μg/m3 (13) 34.0
 
March 26, 2020, 11 p.m. -0.8 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 45.0 ppb (35) N/A N/A 2.8 μg/m3 (12) 35.0
 
March 26, 2020, 10 p.m. -0.6 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (35) N/A N/A 4.8 μg/m3 (20) 35.0
 
March 26, 2020, 9 p.m. -0.5 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 4.3 μg/m3 (18) 36.0
 
March 26, 2020, 8 p.m. 0.6 ppb (1) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) N/A N/A 2.8 μg/m3 (12) 36.0
 
March 26, 2020, 7 p.m. -0.1 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A 47.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
March 26, 2020, 6 p.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) N/A N/A 7.5 μg/m3 (31) 35.0
 
March 26, 2020, 5 p.m. 1.4 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 7.2 μg/m3 (30) 34.0
 
March 26, 2020, 4 p.m. 14.2 ppb (13) 4.1 ppb (4) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 26, 2020, 3 p.m. 38.3 ppb (35) 18.0 ppb (17) N/A 20.0 ppb (19) N/A N/A 14.0 ppb (11) N/A N/A 7.1 μg/m3 (30) 35.0
 
March 26, 2020, 2 p.m. 56.0 ppb (52) 32.7 ppb (30) N/A 23.0 ppb (21) N/A N/A 2.0 ppb (2) N/A N/A 6.1 μg/m3 (25) 52.0
 
March 26, 2020, 1 p.m. 36.6 ppb (34) 14.4 ppb (13) N/A 22.0 ppb (20) N/A N/A 1.0 ppb (1) N/A N/A 6.8 μg/m3 (28) 34.0
 
March 26, 2020, noon 29.2 ppb (27) 6.5 ppb (6) N/A 23.0 ppb (21) N/A N/A 1.0 ppb (1) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 26, 2020, 11 a.m. 17.9 ppb (17) 0.0 ppb (0) N/A 18.0 ppb (17) N/A N/A 7.0 ppb (5) N/A N/A 6.1 μg/m3 (25) 25.0
 
March 26, 2020, 10 a.m. 11.3 ppb (10) -0.6 ppb (0) N/A 12.0 ppb (11) N/A N/A 13.0 ppb (10) N/A N/A 4.9 μg/m3 (20) 20.0
 
March 26, 2020, 9 a.m. 5.4 ppb (5) -0.8 ppb (0) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) N/A N/A 3.7 μg/m3 (15) 21.0
 
March 26, 2020, 8 a.m. 1.1 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A N/A 3.7 μg/m3 (15) 28.0
 
March 26, 2020, 7 a.m. -0.2 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 6.2 μg/m3 (26) 32.0
 
March 26, 2020, 6 a.m. 0.0 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 26, 2020, 5 a.m. 0.1 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 4.8 μg/m3 (20) 32.0
 
March 26, 2020, 4 a.m. 0.7 ppb (1) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 2.6 μg/m3 (11) 32.0
 
March 26, 2020, 3 a.m. -0.1 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 6.5 μg/m3 (27) 34.0
 
March 26, 2020, 2 a.m. -0.1 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 5.5 μg/m3 (23) 34.0
 
March 26, 2020, 1 a.m. -0.5 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 3.1 μg/m3 (13) 32.0
 
March 26, 2020, midnight -1.0 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 3.3 μg/m3 (14) 32.0
 
March 25, 2020, 11 p.m. -0.9 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 42.0 ppb (32) N/A N/A 3.6 μg/m3 (15) 32.0
 
March 25, 2020, 10 p.m. -1.0 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 43.0 ppb (33) N/A N/A 4.1 μg/m3 (17) 33.0
 
March 25, 2020, 9 p.m. -1.2 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 43.0 ppb (33) N/A N/A 6.3 μg/m3 (26) 33.0
 
March 25, 2020, 8 p.m. -0.9 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 4.8 μg/m3 (20) 34.0
 
March 25, 2020, 7 p.m. 0.1 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 2.6 μg/m3 (11) 34.0
 
March 25, 2020, 6 p.m. 1.0 ppb (1) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 4.3 μg/m3 (18) 33.0
 
March 25, 2020, 5 p.m. 0.3 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 5.7 μg/m3 (24) 34.0
 
March 25, 2020, 4 p.m. 7.5 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 25, 2020, 3 p.m. 15.3 ppb (14) 3.2 ppb (3) N/A 12.0 ppb (11) N/A N/A 21.0 ppb (16) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 25, 2020, 2 p.m. 11.9 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) N/A N/A 8.4 μg/m3 (35) 35.0
 
March 25, 2020, 1 p.m. 9.1 ppb (8) -0.7 ppb (0) N/A 10.0 ppb (9) N/A N/A 21.0 ppb (16) N/A N/A 8.9 μg/m3 (37) 37.0
 
March 25, 2020, noon 6.1 ppb (6) -0.8 ppb (0) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 25, 2020, 11 a.m. 4.0 ppb (4) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
March 25, 2020, 10 a.m. 2.1 ppb (2) -0.9 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) N/A N/A 4.3 μg/m3 (18) 25.0
 
March 25, 2020, 9 a.m. 1.6 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A N/A 3.3 μg/m3 (14) 27.0
 
March 25, 2020, 8 a.m. 0.5 ppb (0) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 4.5 μg/m3 (19) 29.0
 
March 25, 2020, 7 a.m. 0.5 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) N/A N/A 5.3 μg/m3 (22) 29.0
 
March 25, 2020, 6 a.m. 0.6 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 5.0 μg/m3 (21) 30.0
 
March 25, 2020, 5 a.m. 0.9 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 3.3 μg/m3 (14) 30.0
 
March 25, 2020, 4 a.m. 0.5 ppb (0) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 5.5 μg/m3 (23) 30.0
 
March 25, 2020, 3 a.m. 0.6 ppb (1) -0.9 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) N/A N/A 6.0 μg/m3 (25) 30.0
 
March 25, 2020, 2 a.m. 0.7 ppb (1) -0.9 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 3.6 μg/m3 (15) 29.0
 
March 25, 2020, 1 a.m. -0.4 ppb (0) -0.9 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 4.1 μg/m3 (17) 32.0
 
March 25, 2020, midnight -0.4 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 43.0 ppb (33) N/A N/A 5.8 μg/m3 (24) 33.0
 
March 24, 2020, 11 p.m. -0.6 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 7.5 μg/m3 (31) 34.0
 
March 24, 2020, 10 p.m. -0.5 ppb (0) -0.7 ppb (0) N/A 0.0 ppb (0) N/A N/A 44.0 ppb (34) N/A N/A 4.6 μg/m3 (19) 34.0
 
March 24, 2020, 9 p.m. -0.4 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 45.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
March 24, 2020, 8 p.m. 1.0 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 6.3 μg/m3 (26) 34.0
 
March 24, 2020, 7 p.m. 5.4 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A N/A 5.3 μg/m3 (22) 29.0
 
March 24, 2020, 6 p.m. 6.3 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A N/A 25.0
 
March 24, 2020, 5 p.m. 5.3 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A N/A 25.0
 
March 24, 2020, 4 p.m. 19.8 ppb (18) 6.6 ppb (6) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) N/A N/A 12.5 μg/m3 (51) 51.0
 
March 24, 2020, 3 p.m. 39.1 ppb (36) 21.0 ppb (19) N/A 18.0 ppb (17) N/A N/A 4.0 ppb (3) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 24, 2020, 2 p.m. 40.8 ppb (38) 22.6 ppb (21) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) N/A N/A 8.4 μg/m3 (35) 38.0
 
March 24, 2020, 1 p.m. 33.7 ppb (31) 16.9 ppb (16) N/A 17.0 ppb (16) N/A N/A 0.0 ppb (0) N/A N/A 6.1 μg/m3 (25) 31.0
 
March 24, 2020, noon 30.9 ppb (29) 14.9 ppb (14) N/A 16.0 ppb (15) N/A N/A 0.0 ppb (0) N/A N/A 5.4 μg/m3 (23) 29.0
 
March 24, 2020, 11 a.m. 23.6 ppb (22) 9.5 ppb (9) N/A 14.0 ppb (13) N/A N/A 0.0 ppb (0) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 24, 2020, 10 a.m. 21.7 ppb (20) 7.3 ppb (7) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) N/A N/A 9.1 μg/m3 (38) 38.0
 
March 24, 2020, 9 a.m. 14.3 ppb (13) 0.2 ppb (0) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 24, 2020, 8 a.m. 13.0 ppb (12) -0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 6.0 ppb (5) N/A N/A 6.7 μg/m3 (28) 28.0
 
March 24, 2020, 7 a.m. 13.5 ppb (12) -0.4 ppb (0) N/A 14.0 ppb (13) N/A N/A 9.0 ppb (7) N/A N/A 6.2 μg/m3 (26) 26.0
 
March 24, 2020, 6 a.m. 10.4 ppb (10) -0.7 ppb (0) N/A 11.0 ppb (10) N/A N/A 15.0 ppb (12) N/A N/A 6.7 μg/m3 (28) 28.0
 
March 24, 2020, 5 a.m. 5.6 ppb (5) -0.9 ppb (0) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
March 24, 2020, 4 a.m. 3.9 ppb (4) -1.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 4.8 μg/m3 (20) 25.0
 
March 24, 2020, 3 a.m. 0.5 ppb (0) -1.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A N/A 5.5 μg/m3 (23) 29.0
 
March 24, 2020, 2 a.m. 1.1 ppb (1) -0.7 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A N/A 4.5 μg/m3 (19) 30.0
 
March 24, 2020, 1 a.m. -0.3 ppb (0) -1.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) N/A N/A 3.6 μg/m3 (15) 32.0
 
March 24, 2020, midnight -0.5 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) N/A N/A 3.3 μg/m3 (14) 32.0
 
March 23, 2020, 11 p.m. -0.2 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) N/A N/A 5.3 μg/m3 (22) 32.0
 
March 23, 2020, 10 p.m. -0.8 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 45.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 23, 2020, 9 p.m. -0.5 ppb (0) -0.8 ppb (0) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (35) N/A N/A 5.3 μg/m3 (22) 35.0
 
March 23, 2020, 8 p.m. -0.3 ppb (0) -0.6 ppb (0) N/A 0.0 ppb (0) N/A N/A 46.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
March 23, 2020, 7 p.m. 0.2 ppb (0) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) N/A N/A 3.8 μg/m3 (16) 34.0
 
March 23, 2020, 6 p.m. 0.7 ppb (1) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) N/A N/A 5.5 μg/m3 (23) 33.0
 
March 23, 2020, 5 p.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 6.5 μg/m3 (27) 32.0
 
March 23, 2020, 4 p.m. 6.0 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) N/A N/A 7.7 μg/m3 (32) 32.0
 
March 23, 2020, 3 p.m. 21.0 ppb (19) 7.0 ppb (6) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) N/A N/A 5.5 μg/m3 (23) 23.0
 
March 23, 2020, 2 p.m. 22.0 ppb (20) 5.5 ppb (5) N/A 16.0 ppb (15) N/A N/A 8.0 ppb (6) N/A N/A 3.3 μg/m3 (14) 20.0
 
March 23, 2020, 1 p.m. 6.0 ppb (6) -0.7 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 4.7 μg/m3 (20) 20.0
 
March 23, 2020, noon 7.1 ppb (7) -0.6 ppb (0) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) N/A N/A 4.2 μg/m3 (18) 18.0
 
March 23, 2020, 11 a.m. 3.5 ppb (3) -0.8 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) N/A N/A 3.7 μg/m3 (15) 18.0
 
March 23, 2020, 10 a.m. 3.7 ppb (3) -0.9 ppb (0) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (18) N/A N/A 6.0 μg/m3 (25) 25.0