AQSQID: 060371201

Site Name: Reseda

Location: LA, CA

Reporting: True, Located: True

Current AQI: 55.0

LA CA, US: 34.1992, -118.5331

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2019, 4 p.m. 6.1 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.24 ppb (3) N/A 14.5 μg/m3 (55) 55.0
 
May 25, 2019, 3 p.m. 8.3 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.28 ppb (3) N/A 9.9 μg/m3 (41) 41.0
 
May 25, 2019, 2 p.m. 10.0 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 25, 2019, 1 p.m. 6.7 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.25 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
May 25, 2019, noon 10.2 ppb (9) 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.31 ppb (3) N/A 8.5 μg/m3 (35) 35.0
 
May 25, 2019, 11 a.m. 15.4 ppb (14) 0.1 ppb (0) N/A 15.0 ppb (14) N/A N/A 10.0 ppb (8) 0.4 ppb (4) N/A 8.5 μg/m3 (35) 35.0
 
May 25, 2019, 10 a.m. 16.0 ppb (15) 0.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 11.0 ppb (8) 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
May 25, 2019, 9 a.m. 12.8 ppb (12) -0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) 0.45 ppb (5) N/A 12.1 μg/m3 (50) 50.0
 
May 25, 2019, 8 a.m. 13.1 ppb (12) 0.3 ppb (0) N/A 13.0 ppb (12) N/A N/A 18.0 ppb (14) 0.47 ppb (5) N/A 15.6 μg/m3 (58) 58.0
 
May 25, 2019, 7 a.m. 13.1 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) 0.42 ppb (5) N/A 16.8 μg/m3 (60) 60.0
 
May 25, 2019, 6 a.m. 8.2 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.31 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
May 25, 2019, 5 a.m. 5.8 ppb (5) -0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) 0.28 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
May 25, 2019, 4 a.m. 6.3 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) 0.29 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
May 25, 2019, 3 a.m. 5.1 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.25 ppb (3) N/A 11.9 μg/m3 (50) 50.0
 
May 25, 2019, 2 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.22 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
May 25, 2019, 1 a.m. 4.3 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 38.0
 
May 25, 2019, midnight 4.4 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) 0.24 ppb (3) N/A 8.8 μg/m3 (37) 39.0
 
May 24, 2019, 11 p.m. 3.6 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) 0.23 ppb (3) N/A 9.2 μg/m3 (38) 42.0
 
May 24, 2019, 10 p.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.22 ppb (2) N/A 6.1 μg/m3 (25) 40.0
 
May 24, 2019, 9 p.m. 3.0 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.2 ppb (2) N/A 7.5 μg/m3 (31) 38.0
 
May 24, 2019, 8 p.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.22 ppb (2) N/A 10.5 μg/m3 (44) 44.0
 
May 24, 2019, 7 p.m. 5.2 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (37) 0.25 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
May 24, 2019, 6 p.m. 7.1 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.25 ppb (3) N/A 8.5 μg/m3 (35) 35.0
 
May 24, 2019, 5 p.m. 4.7 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.22 ppb (2) N/A 5.6 μg/m3 (23) 33.0
 
May 24, 2019, 4 p.m. 5.2 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.22 ppb (2) N/A 7.5 μg/m3 (31) 32.0
 
May 24, 2019, 3 p.m. 12.6 ppb (12) 3.8 ppb (4) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) 0.29 ppb (3) N/A 10.9 μg/m3 (45) 45.0
 
May 24, 2019, 2 p.m. 26.4 ppb (24) 12.3 ppb (11) N/A 14.0 ppb (13) N/A N/A 13.0 ppb (10) 0.46 ppb (5) N/A 9.3 μg/m3 (39) 39.0
 
May 24, 2019, 1 p.m. 33.4 ppb (31) 18.2 ppb (17) N/A 15.0 ppb (14) N/A N/A 5.0 ppb (4) 0.48 ppb (5) N/A 7.5 μg/m3 (31) 31.0
 
May 24, 2019, noon 22.0 ppb (20) 7.6 ppb (7) N/A 14.0 ppb (13) N/A N/A 3.0 ppb (2) 0.39 ppb (4) N/A 6.5 μg/m3 (27) 27.0
 
May 24, 2019, 11 a.m. 16.6 ppb (15) 1.8 ppb (2) N/A 15.0 ppb (14) N/A N/A 4.0 ppb (3) 0.31 ppb (3) N/A 3.8 μg/m3 (16) 16.0
 
May 24, 2019, 10 a.m. 15.7 ppb (15) 1.7 ppb (2) N/A 14.0 ppb (13) N/A N/A 5.0 ppb (4) 0.34 ppb (4) N/A 6.3 μg/m3 (26) 26.0
 
May 24, 2019, 9 a.m. 17.1 ppb (16) 1.2 ppb (1) N/A 16.0 ppb (15) N/A N/A 5.0 ppb (4) 0.39 ppb (4) N/A 6.8 μg/m3 (28) 28.0
 
May 24, 2019, 8 a.m. 18.6 ppb (17) 1.2 ppb (1) N/A 17.0 ppb (16) N/A N/A 4.0 ppb (3) 0.41 ppb (5) N/A 9.2 μg/m3 (38) 38.0
 
May 24, 2019, 7 a.m. 17.9 ppb (17) 0.6 ppb (1) N/A 17.0 ppb (16) N/A N/A 7.0 ppb (5) 0.39 ppb (4) N/A 10.9 μg/m3 (45) 45.0
 
May 24, 2019, 6 a.m. 13.0 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) 0.35 ppb (4) N/A 6.8 μg/m3 (28) 28.0
 
May 24, 2019, 5 a.m. 7.3 ppb (7) -0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
May 24, 2019, 4 a.m. 5.7 ppb (5) -0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.23 ppb (3) N/A 12.6 μg/m3 (51) 51.0
 
May 24, 2019, 3 a.m. 4.3 ppb (4) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.21 ppb (2) N/A 10.2 μg/m3 (42) 42.0
 
May 24, 2019, 2 a.m. 1.7 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 24, 2019, 1 a.m. 2.0 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
May 24, 2019, midnight 1.7 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) 0.18 ppb (2) N/A 7.3 μg/m3 (30) 33.0
 
May 23, 2019, 11 p.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.19 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
May 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.6 μg/m3 (56) 56.0
 
May 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 17.1 μg/m3 (61) 61.0
 
May 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.6 μg/m3 (44) 44.0
 
May 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.2 μg/m3 (47) 47.0
 
May 23, 2019, 6 p.m. 13.7 ppb (13) 1.7 ppb (2) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.28 ppb (3) N/A 8.8 μg/m3 (37) 37.0
 
May 23, 2019, 5 p.m. 14.9 ppb (14) 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.28 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
May 23, 2019, 4 p.m. 14.9 ppb (14) 2.1 ppb (2) N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.29 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
May 23, 2019, 3 p.m. 11.9 ppb (11) 1.3 ppb (1) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.29 ppb (3) N/A 9.9 μg/m3 (41) 41.0
 
May 23, 2019, 2 p.m. 14.9 ppb (14) 1.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) 0.33 ppb (4) N/A 10.4 μg/m3 (43) 43.0
 
May 23, 2019, 1 p.m. 16.3 ppb (15) 0.9 ppb (1) N/A 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.33 ppb (4) N/A 9.4 μg/m3 (39) 39.0
 
May 23, 2019, noon 16.5 ppb (15) 1.7 ppb (2) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.37 ppb (4) N/A 11.6 μg/m3 (48) 48.0
 
May 23, 2019, 11 a.m. 13.0 ppb (12) -0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.34 ppb (4) N/A 10.6 μg/m3 (44) 44.0
 
May 23, 2019, 10 a.m. 13.8 ppb (13) 0.2 ppb (0) N/A 14.0 ppb (13) N/A N/A 20.0 ppb (15) 0.31 ppb (3) N/A 11.9 μg/m3 (50) 50.0
 
May 23, 2019, 9 a.m. 12.5 ppb (12) -0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 23.0 ppb (18) 0.32 ppb (4) N/A 8.7 μg/m3 (36) 36.0
 
May 23, 2019, 8 a.m. 13.3 ppb (12) 0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 24.0 ppb (18) 0.31 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
May 23, 2019, 7 a.m. 12.7 ppb (12) -0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.31 ppb (3) N/A 5.1 μg/m3 (21) 22.0
 
May 23, 2019, 6 a.m. 11.0 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.29 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
May 23, 2019, 5 a.m. 10.8 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.31 ppb (3) N/A 9.5 μg/m3 (40) 40.0
 
May 23, 2019, 4 a.m. 13.2 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A N/A 31.0 ppb (24) 0.33 ppb (4) N/A 6.8 μg/m3 (28) 28.0
 
May 23, 2019, 3 a.m. 10.7 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 38.0 ppb (29) 0.3 ppb (3) N/A 2.9 μg/m3 (12) 29.0
 
May 23, 2019, 2 a.m. 5.7 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 46.0 ppb (35) 0.25 ppb (3) N/A 2.3 μg/m3 (10) 35.0
 
May 23, 2019, 1 a.m. 4.9 ppb (5) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.22 ppb (2) N/A 5.1 μg/m3 (21) 35.0
 
May 23, 2019, midnight 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 35.0
 
May 22, 2019, 11 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.19 ppb (2) N/A 7.3 μg/m3 (30) 35.0
 
May 22, 2019, 10 p.m. 5.8 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.23 ppb (3) N/A 6.3 μg/m3 (26) 32.0
 
May 22, 2019, 9 p.m. 5.9 ppb (5) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.23 ppb (3) N/A 5.3 μg/m3 (22) 32.0
 
May 22, 2019, 8 p.m. 3.4 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.2 ppb (2) N/A 5.1 μg/m3 (21) 38.0
 
May 22, 2019, 7 p.m. 2.5 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.18 ppb (2) N/A 4.6 μg/m3 (19) 38.0
 
May 22, 2019, 6 p.m. 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.18 ppb (2) N/A 3.6 μg/m3 (15) 38.0
 
May 22, 2019, 5 p.m. 2.4 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.18 ppb (2) N/A 1.1 μg/m3 (5) 36.0
 
May 22, 2019, 4 p.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.19 ppb (2) N/A 0.6 μg/m3 (2) 35.0
 
May 22, 2019, 3 p.m. 9.4 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A 35.0 ppb (27) 0.26 ppb (3) N/A 3.1 μg/m3 (13) 27.0
 
May 22, 2019, 2 p.m. 11.4 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) 0.28 ppb (3) N/A 5.3 μg/m3 (22) 23.0
 
May 22, 2019, 1 p.m. 17.1 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A N/A 22.0 ppb (17) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
May 22, 2019, noon 13.1 ppb (12) 2.3 ppb (2) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.26 ppb (3) N/A 0.6 μg/m3 (2) 18.0
 
May 22, 2019, 11 a.m. 3.9 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A 0.3 μg/m3 (1) 25.0
 
May 22, 2019, 10 a.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 5.5 μg/m3 (23) 28.0
 
May 22, 2019, 9 a.m. 2.7 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.18 ppb (2) N/A 8.8 μg/m3 (37) 37.0
 
May 22, 2019, 8 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.18 ppb (2) N/A 8.5 μg/m3 (35) 35.0
 
May 22, 2019, 7 a.m. 3.5 ppb (3) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) 0.19 ppb (2) N/A 7.8 μg/m3 (32) 32.0
 
May 22, 2019, 6 a.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.18 ppb (2) N/A 8.6 μg/m3 (36) 36.0
 
May 22, 2019, 5 a.m. 3.4 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.19 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
May 22, 2019, 4 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.19 ppb (2) N/A 5.8 μg/m3 (24) 29.0
 
May 22, 2019, 3 a.m. 4.2 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.2 ppb (2) N/A 7.3 μg/m3 (30) 31.0
 
May 22, 2019, 2 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.18 ppb (2) N/A 9.7 μg/m3 (40) 40.0
 
May 22, 2019, 1 a.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.19 ppb (2) N/A 8.8 μg/m3 (37) 37.0
 
May 22, 2019, midnight 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.19 ppb (2) N/A 5.8 μg/m3 (24) 36.0
 
May 21, 2019, 11 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.18 ppb (2) N/A 5.6 μg/m3 (23) 38.0
 
May 21, 2019, 10 p.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.18 ppb (2) N/A 9.2 μg/m3 (38) 38.0
 
May 21, 2019, 9 p.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.19 ppb (2) N/A 12.2 μg/m3 (50) 50.0
 
May 21, 2019, 8 p.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.19 ppb (2) N/A 4.6 μg/m3 (19) 36.0
 
May 21, 2019, 7 p.m. 3.5 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.18 ppb (2) N/A 1.6 μg/m3 (7) 35.0
 
May 21, 2019, 6 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.19 ppb (2) N/A 7.3 μg/m3 (30) 36.0
 
May 21, 2019, 5 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.2 ppb (2) N/A 10.2 μg/m3 (42) 42.0
 
May 21, 2019, 4 p.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.18 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
May 21, 2019, 3 p.m. 5.0 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.19 ppb (2) N/A 6.6 μg/m3 (28) 32.0
 
May 21, 2019, 2 p.m. 7.6 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.25 ppb (3) N/A 5.3 μg/m3 (22) 28.0
 
May 21, 2019, 1 p.m. 7.1 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.23 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
May 21, 2019, noon 5.8 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.22 ppb (2) N/A 7.5 μg/m3 (31) 31.0
 
May 21, 2019, 11 a.m. 4.2 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 30.0
 
May 21, 2019, 10 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.17 ppb (2) N/A 9.4 μg/m3 (39) 39.0
 
May 21, 2019, 9 a.m. 4.1 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.18 ppb (2) N/A 6.3 μg/m3 (26) 31.0
 
May 21, 2019, 8 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.2 ppb (2) N/A 2.6 μg/m3 (11) 30.0
 
May 21, 2019, 7 a.m. 8.8 ppb (8) -0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.29 ppb (3) N/A 2.6 μg/m3 (11) 22.0
 
May 21, 2019, 6 a.m. 9.8 ppb (9) 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.32 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
May 21, 2019, 5 a.m. 5.9 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
May 21, 2019, 4 a.m. 3.9 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.2 ppb (2) N/A 0.8 μg/m3 (3) 33.0
 
May 21, 2019, 3 a.m. 3.5 ppb (3) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.19 ppb (2) N/A 3.4 μg/m3 (14) 35.0
 
May 21, 2019, 2 a.m. 3.5 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.19 ppb (2) N/A 3.8 μg/m3 (16) 38.0
 
May 21, 2019, 1 a.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) 0.18 ppb (2) N/A 5.3 μg/m3 (22) 39.0
 
May 21, 2019, midnight 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
May 20, 2019, 11 p.m. 3.9 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) 0.2 ppb (2) N/A 2.4 μg/m3 (10) 42.0
 
May 20, 2019, 10 p.m. 3.6 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) 0.19 ppb (2) N/A 4.3 μg/m3 (18) 42.0
 
May 20, 2019, 9 p.m. 3.5 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) 0.2 ppb (2) N/A 1.4 μg/m3 (6) 42.0
 
May 20, 2019, 8 p.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) 0.18 ppb (2) N/A -0.2 μg/m3 (0) 44.0
 
May 20, 2019, 7 p.m. 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) 0.18 ppb (2) N/A 1.4 μg/m3 (6) 43.0
 
May 20, 2019, 6 p.m. 3.2 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 54.0 ppb (42) 0.2 ppb (2) N/A 1.6 μg/m3 (7) 42.0
 
May 20, 2019, 5 p.m. 4.3 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.19 ppb (2) N/A 1.6 μg/m3 (7) 38.0
 
May 20, 2019, 4 p.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.21 ppb (2) N/A 2.8 μg/m3 (12) 35.0
 
May 20, 2019, 3 p.m. 5.9 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.22 ppb (2) N/A 6.1 μg/m3 (25) 33.0
 
May 20, 2019, 2 p.m. 15.4 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.3 ppb (3) N/A 4.8 μg/m3 (20) 23.0
 
May 20, 2019, 1 p.m. 13.7 ppb (13) 2.1 ppb (2) N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) 0.34 ppb (4) N/A 3.3 μg/m3 (14) 18.0
 
May 20, 2019, noon 12.1 ppb (11) 2.9 ppb (3) N/A 9.0 ppb (8) N/A N/A 36.0 ppb (28) 0.26 ppb (3) N/A 6.3 μg/m3 (26) 28.0
 
May 20, 2019, 11 a.m. 1.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) 0.16 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
May 20, 2019, 10 a.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) 0.17 ppb (2) N/A 5.8 μg/m3 (24) 35.0
 
May 20, 2019, 9 a.m. 1.0 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.16 ppb (2) N/A 4.8 μg/m3 (20) 35.0
 
May 20, 2019, 8 a.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.18 ppb (2) N/A 6.6 μg/m3 (28) 35.0
 
May 20, 2019, 7 a.m. 1.2 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) 0.16 ppb (2) N/A 8.8 μg/m3 (37) 37.0
 
May 20, 2019, 6 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.17 ppb (2) N/A 7.3 μg/m3 (30) 35.0
 
May 20, 2019, 5 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.18 ppb (2) N/A 6.6 μg/m3 (28) 36.0
 
May 20, 2019, 4 a.m. 1.7 ppb (2) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.18 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
May 20, 2019, 3 a.m. 1.3 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) 0.19 ppb (2) N/A 6.6 μg/m3 (28) 38.0
 
May 20, 2019, 2 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.18 ppb (2) N/A 5.1 μg/m3 (21) 37.0
 
May 20, 2019, 1 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) 0.16 ppb (2) N/A 6.3 μg/m3 (26) 37.0
 
May 20, 2019, midnight 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) 0.17 ppb (2) N/A 7.3 μg/m3 (30) 38.0
 
May 19, 2019, 11 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) 0.16 ppb (2) N/A 5.6 μg/m3 (23) 41.0
 
May 19, 2019, 10 p.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) 0.17 ppb (2) N/A 4.6 μg/m3 (19) 42.0
 
May 19, 2019, 9 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 55.0 ppb (42) 0.17 ppb (2) N/A 6.1 μg/m3 (25) 42.0
 
May 19, 2019, 8 p.m. 2.8 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.18 ppb (2) N/A 6.1 μg/m3 (25) 40.0
 
May 19, 2019, 7 p.m. 6.2 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.21 ppb (2) N/A 6.8 μg/m3 (28) 33.0
 
May 19, 2019, 6 p.m. 8.0 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 38.0 ppb (29) 0.25 ppb (3) N/A 7.6 μg/m3 (32) 32.0
 
May 19, 2019, 5 p.m. 7.2 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 31.0
 
May 19, 2019, 4 p.m. 6.6 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.24 ppb (3) N/A 5.5 μg/m3 (23) 32.0
 
May 19, 2019, 3 p.m. 3.8 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.21 ppb (2) N/A 3.8 μg/m3 (16) 35.0
 
May 19, 2019, 2 p.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.19 ppb (2) N/A 4.8 μg/m3 (20) 33.0
 
May 19, 2019, 1 p.m. 2.9 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.2 ppb (2) N/A 6.8 μg/m3 (28) 32.0
 
May 19, 2019, noon 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.18 ppb (2) N/A 6.6 μg/m3 (28) 35.0
 
May 19, 2019, 11 a.m. 1.5 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.17 ppb (2) N/A 4.3 μg/m3 (18) 38.0
 
May 19, 2019, 10 a.m. 1.5 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.17 ppb (2) N/A 3.6 μg/m3 (15) 38.0
 
May 19, 2019, 9 a.m. 1.5 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.16 ppb (2) N/A 7.6 μg/m3 (32) 38.0
 
May 19, 2019, 8 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.17 ppb (2) N/A 8.2 μg/m3 (34) 40.0
 
May 19, 2019, 7 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 52.0 ppb (40) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 40.0
 
May 19, 2019, 6 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.2 ppb (2) N/A 9.9 μg/m3 (41) 41.0
 
May 19, 2019, 5 a.m. 5.3 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.26 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
May 19, 2019, 4 a.m. 4.4 ppb (4) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) 0.21 ppb (2) N/A 7.3 μg/m3 (30) 36.0
 
May 19, 2019, 3 a.m. 4.0 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (38) 0.21 ppb (2) N/A 9.7 μg/m3 (40) 40.0
 
May 19, 2019, 2 a.m. 5.0 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.22 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
May 19, 2019, 1 a.m. 4.3 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) 0.22 ppb (2) N/A 11.1 μg/m3 (46) 46.0
 
May 19, 2019, midnight 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) 0.2 ppb (2) N/A 11.6 μg/m3 (48) 48.0
 
May 18, 2019, 11 p.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) 0.18 ppb (2) N/A 13.5 μg/m3 (53) 53.0
 
May 18, 2019, 10 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 59.0 ppb (45) 0.19 ppb (2) N/A 9.6 μg/m3 (40) 45.0
 
May 18, 2019, 9 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) 0.18 ppb (2) N/A 9.4 μg/m3 (39) 45.0
 
May 18, 2019, 8 p.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 58.0 ppb (45) 0.21 ppb (2) N/A 9.9 μg/m3 (41) 45.0
 
May 18, 2019, 7 p.m. 3.8 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 58.0 ppb (45) 0.22 ppb (2) N/A 8.8 μg/m3 (37) 45.0
 
May 18, 2019, 6 p.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) 0.23 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
May 18, 2019, 5 p.m. 5.5 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) 0.24 ppb (3) N/A 11.9 μg/m3 (50) 50.0