AQSQID: 060370016

Site Name: Glendora - Laurel

Location: Glendora, CA

Reporting: True, Located: True

Current AQI: 45.0

Glendora CA, US: 34.1439, -117.8508

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 25, 2019, 9 p.m. 15.1 ppb (14) 2.5 ppb (2) N/A 13.0 ppb (12) N/A N/A 59.0 ppb (45) 0.47 ppb (5) N/A N/A 45.0
 
March 25, 2019, 8 p.m. 18.8 ppb (17) 3.7 ppb (3) N/A 15.0 ppb (14) N/A N/A 51.0 ppb (39) 0.49 ppb (5) N/A N/A 39.0
 
March 25, 2019, 7 p.m. 27.0 ppb (25) 6.7 ppb (6) N/A 20.0 ppb (19) N/A N/A 41.0 ppb (32) 0.55 ppb (6) N/A N/A 32.0
 
March 25, 2019, 6 p.m. 36.2 ppb (34) 11.1 ppb (10) N/A 25.0 ppb (23) N/A N/A 30.0 ppb (23) 0.63 ppb (7) N/A N/A 34.0
 
March 25, 2019, 5 p.m. 31.2 ppb (29) 9.9 ppb (9) N/A 21.0 ppb (19) N/A N/A 28.0 ppb (22) 0.59 ppb (7) N/A N/A 29.0
 
March 25, 2019, 4 p.m. 22.0 ppb (20) 5.8 ppb (5) N/A 16.0 ppb (15) N/A N/A 28.0 ppb (22) 0.47 ppb (5) N/A N/A 22.0
 
March 25, 2019, 3 p.m. 11.8 ppb (11) 2.6 ppb (2) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.38 ppb (4) N/A N/A 26.0
 
March 25, 2019, 2 p.m. 5.8 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.32 ppb (4) N/A N/A 30.0
 
March 25, 2019, 1 p.m. 5.9 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.32 ppb (4) N/A N/A 25.0
 
March 25, 2019, noon 4.1 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.31 ppb (3) N/A N/A 23.0
 
March 25, 2019, 11 a.m. 3.6 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.3 ppb (3) N/A N/A 22.0
 
March 25, 2019, 10 a.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.31 ppb (3) N/A N/A 25.0
 
March 25, 2019, 9 a.m. 5.2 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.34 ppb (4) N/A N/A 17.0
 
March 25, 2019, 8 a.m. 6.1 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) 0.36 ppb (4) N/A N/A 16.0
 
March 25, 2019, 7 a.m. 7.1 ppb (7) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) 0.38 ppb (4) N/A N/A 16.0
 
March 25, 2019, 6 a.m. 7.3 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.39 ppb (4) N/A N/A 17.0
 
March 25, 2019, 5 a.m. 7.5 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.4 ppb (4) N/A N/A 22.0
 
March 25, 2019, 4 a.m. 8.1 ppb (8) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.42 ppb (5) N/A N/A 24.0
 
March 25, 2019, 3 a.m. 8.2 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.41 ppb (5) N/A N/A 30.0
 
March 25, 2019, 2 a.m. 11.2 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 47.0 ppb (36) 0.42 ppb (5) N/A N/A 36.0
 
March 25, 2019, 1 a.m. 7.6 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 65.0 ppb (50) 0.4 ppb (4) N/A N/A 50.0
 
March 25, 2019, midnight 5.3 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 68.0 ppb (52) 0.39 ppb (4) N/A N/A 52.0
 
March 24, 2019, 11 p.m. 3.7 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 64.0 ppb (49) 0.36 ppb (4) N/A N/A 49.0
 
March 24, 2019, 10 p.m. 3.4 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 62.0 ppb (48) 0.35 ppb (4) N/A N/A 48.0
 
March 24, 2019, 9 p.m. 3.5 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (45) 0.35 ppb (4) N/A N/A 45.0
 
March 24, 2019, 8 p.m. 3.4 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (41) 0.33 ppb (4) N/A N/A 41.0
 
March 24, 2019, 7 p.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.34 ppb (4) N/A N/A 36.0
 
March 24, 2019, 6 p.m. 4.4 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) 0.34 ppb (4) N/A N/A 32.0
 
March 24, 2019, 5 p.m. 4.3 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.33 ppb (4) N/A N/A 29.0
 
March 24, 2019, 4 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.3 ppb (3) N/A N/A 29.0
 
March 24, 2019, 3 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.29 ppb (3) N/A N/A 22.0
 
March 24, 2019, 2 p.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) 0.29 ppb (3) N/A N/A 21.0
 
March 24, 2019, 1 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) 0.29 ppb (3) N/A N/A 18.0
 
March 24, 2019, noon 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) 0.3 ppb (3) N/A N/A 18.0
 
March 24, 2019, 11 a.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.31 ppb (3) N/A N/A 17.0
 
March 24, 2019, 10 a.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.32 ppb (4) N/A N/A 17.0
 
March 24, 2019, 9 a.m. 3.7 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.33 ppb (4) N/A N/A 15.0
 
March 24, 2019, 8 a.m. 4.6 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) 0.31 ppb (3) N/A N/A 19.0
 
March 24, 2019, 7 a.m. 5.6 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.33 ppb (4) N/A N/A 21.0
 
March 24, 2019, 6 a.m. 6.2 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.32 ppb (4) N/A N/A 21.0
 
March 24, 2019, 5 a.m. 6.9 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (19) 0.34 ppb (4) N/A N/A 19.0
 
March 24, 2019, 4 a.m. 6.5 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.33 ppb (4) N/A N/A 20.0
 
March 24, 2019, 3 a.m. 5.8 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.32 ppb (4) N/A N/A 22.0
 
March 24, 2019, 2 a.m. 6.3 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.33 ppb (4) N/A N/A 25.0
 
March 24, 2019, 1 a.m. 6.4 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.36 ppb (4) N/A N/A 34.0
 
March 24, 2019, midnight 7.6 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 46.0 ppb (35) 0.35 ppb (4) N/A N/A 35.0
 
March 23, 2019, 11 p.m. 6.4 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 49.0 ppb (38) 0.36 ppb (4) N/A N/A 38.0
 
March 23, 2019, 10 p.m. 7.2 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (41) 0.39 ppb (4) N/A N/A 41.0
 
March 23, 2019, 9 p.m. 6.0 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (41) 0.37 ppb (4) N/A N/A 41.0
 
March 23, 2019, 8 p.m. 5.5 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) 0.35 ppb (4) N/A N/A 36.0
 
March 23, 2019, 7 p.m. 5.1 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.34 ppb (4) N/A N/A 32.0
 
March 23, 2019, 6 p.m. 6.0 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.34 ppb (4) N/A N/A 31.0
 
March 23, 2019, 5 p.m. 4.3 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.29 ppb (3) N/A N/A 31.0
 
March 23, 2019, 4 p.m. 3.8 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.27 ppb (3) N/A N/A 28.0
 
March 23, 2019, 3 p.m. 5.0 ppb (5) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.3 ppb (3) N/A N/A 18.0
 
March 23, 2019, 2 p.m. 4.6 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) 0.31 ppb (3) N/A N/A 12.0
 
March 23, 2019, 1 p.m. 4.0 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 14.0 ppb (11) 0.31 ppb (3) N/A N/A 11.0
 
March 23, 2019, noon 4.4 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) 0.32 ppb (4) N/A N/A 10.0
 
March 23, 2019, 11 a.m. 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) 0.34 ppb (4) N/A N/A 12.0
 
March 23, 2019, 10 a.m. 5.8 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 15.0 ppb (12) 0.34 ppb (4) N/A N/A 12.0
 
March 23, 2019, 9 a.m. 6.2 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (11) 0.35 ppb (4) N/A N/A 11.0
 
March 23, 2019, 8 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (11) 0.35 ppb (4) N/A N/A 11.0
 
March 23, 2019, 7 a.m. 6.1 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) 0.36 ppb (4) N/A N/A 13.0
 
March 23, 2019, 6 a.m. 6.8 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) 0.36 ppb (4) N/A N/A 15.0
 
March 23, 2019, 5 a.m. 7.0 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) 0.37 ppb (4) N/A N/A 16.0
 
March 23, 2019, 4 a.m. 8.0 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.38 ppb (4) N/A N/A 17.0
 
March 23, 2019, 3 a.m. 11.5 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 28.0 ppb (22) 0.4 ppb (4) N/A N/A 22.0
 
March 23, 2019, 2 a.m. 12.4 ppb (11) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 37.0 ppb (28) 0.39 ppb (4) N/A N/A 28.0
 
March 23, 2019, 1 a.m. 13.0 ppb (12) 0.9 ppb (1) N/A 12.0 ppb (11) N/A N/A 44.0 ppb (34) 0.4 ppb (4) N/A N/A 34.0
 
March 23, 2019, midnight 14.5 ppb (13) 1.7 ppb (2) N/A 13.0 ppb (12) N/A N/A 47.0 ppb (36) 0.43 ppb (5) N/A N/A 36.0
 
March 22, 2019, 11 p.m. 11.8 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A N/A 50.0 ppb (38) 0.43 ppb (5) N/A N/A 38.0
 
March 22, 2019, 10 p.m. 9.7 ppb (9) 2.1 ppb (2) N/A 8.0 ppb (7) N/A N/A 48.0 ppb (37) 0.4 ppb (4) N/A N/A 37.0
 
March 22, 2019, 9 p.m. 10.6 ppb (10) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A 45.0 ppb (35) 0.4 ppb (4) N/A N/A 35.0
 
March 22, 2019, 8 p.m. 9.1 ppb (8) 2.3 ppb (2) N/A 7.0 ppb (6) N/A N/A 45.0 ppb (35) 0.36 ppb (4) N/A N/A 35.0
 
March 22, 2019, 7 p.m. 7.8 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.35 ppb (4) N/A N/A 33.0
 
March 22, 2019, 6 p.m. 9.4 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.34 ppb (4) N/A N/A 32.0
 
March 22, 2019, 5 p.m. 9.1 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.33 ppb (4) 10.0 μg/m3 (9) 0.6 μg/m3 (2) 31.0
 
March 22, 2019, 4 p.m. 9.2 ppb (9) 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A 33.0 ppb (25) 0.32 ppb (4) 9.0 μg/m3 (8) 3.1 μg/m3 (13) 25.0
 
March 22, 2019, 3 p.m. 4.4 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) 0.3 ppb (3) 6.0 μg/m3 (5) 5.5 μg/m3 (23) 23.0
 
March 22, 2019, 2 p.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.27 ppb (3) -1.0 μg/m3 (0) 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 1 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) 0.27 ppb (3) -1.0 μg/m3 (0) 7.2 μg/m3 (30) 30.0
 
March 22, 2019, noon 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) 0.27 ppb (3) 4.0 μg/m3 (4) 9.3 μg/m3 (39) 39.0
 
March 22, 2019, 11 a.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) 0.3 ppb (3) 5.0 μg/m3 (5) 5.5 μg/m3 (23) 23.0
 
March 22, 2019, 10 a.m. 7.2 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) 0.31 ppb (3) 7.0 μg/m3 (6) 5.7 μg/m3 (24) 24.0
 
March 22, 2019, 9 a.m. 9.2 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) 0.33 ppb (4) 16.0 μg/m3 (15) 6.6 μg/m3 (28) 28.0
 
March 22, 2019, 8 a.m. 7.5 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.32 ppb (4) 7.0 μg/m3 (6) 7.6 μg/m3 (32) 32.0
 
March 22, 2019, 7 a.m. 5.7 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.31 ppb (3) 5.0 μg/m3 (5) 10.5 μg/m3 (44) 44.0
 
March 22, 2019, 6 a.m. 5.1 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (18) 0.31 ppb (3) 6.0 μg/m3 (5) 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 5 a.m. 10.0 ppb (9) 0.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.34 ppb (4) 7.0 μg/m3 (6) 6.9 μg/m3 (29) 29.0
 
March 22, 2019, 4 a.m. 5.7 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.32 ppb (4) 7.0 μg/m3 (6) 8.4 μg/m3 (35) 35.0
 
March 22, 2019, 3 a.m. 5.4 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.32 ppb (4) 8.0 μg/m3 (7) 12.2 μg/m3 (50) 50.0
 
March 22, 2019, 2 a.m. 6.3 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.32 ppb (4) 9.0 μg/m3 (8) 7.3 μg/m3 (30) 30.0
 
March 22, 2019, 1 a.m. 9.5 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.34 ppb (4) 9.0 μg/m3 (8) 5.7 μg/m3 (24) 30.0
 
March 22, 2019, midnight 8.8 ppb (8) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A 44.0 ppb (34) 0.34 ppb (4) 8.0 μg/m3 (7) 7.9 μg/m3 (33) 34.0
 
March 21, 2019, 11 p.m. 9.0 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A 45.0 ppb (35) 0.35 ppb (4) 7.0 μg/m3 (6) 8.8 μg/m3 (37) 37.0
 
March 21, 2019, 10 p.m. 9.8 ppb (9) 1.8 ppb (2) N/A 8.0 ppb (7) N/A N/A 43.0 ppb (33) 0.35 ppb (4) 8.0 μg/m3 (7) 8.1 μg/m3 (34) 34.0
 
March 21, 2019, 9 p.m. 8.1 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.34 ppb (4) 7.0 μg/m3 (6) 7.9 μg/m3 (33) 34.0
 
March 21, 2019, 8 p.m. 8.2 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.34 ppb (4) 7.0 μg/m3 (6) 6.7 μg/m3 (28) 33.0
 
March 21, 2019, 7 p.m. 6.4 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.34 ppb (4) 8.0 μg/m3 (7) 10.1 μg/m3 (42) 42.0
 
March 21, 2019, 6 p.m. 8.1 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.32 ppb (4) 8.0 μg/m3 (7) 6.6 μg/m3 (28) 32.0
 
March 21, 2019, 5 p.m. 6.9 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.32 ppb (4) 15.0 μg/m3 (14) 7.6 μg/m3 (32) 32.0
 
March 21, 2019, 4 p.m. 6.2 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.31 ppb (3) 27.0 μg/m3 (25) 7.6 μg/m3 (32) 32.0
 
March 21, 2019, 3 p.m. 10.1 ppb (9) 1.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) N/A 17.0 μg/m3 (15) 8.6 μg/m3 (36) 36.0
 
March 21, 2019, 2 p.m. 9.1 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 17.0 ppb (13) 0.3 ppb (3) 5.0 μg/m3 (5) 5.3 μg/m3 (22) 22.0
 
March 21, 2019, 1 p.m. 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) 0.26 ppb (3) 3.0 μg/m3 (3) 6.7 μg/m3 (28) 28.0
 
March 21, 2019, noon 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) 0.26 ppb (3) 0.0 μg/m3 (0) 8.6 μg/m3 (36) 36.0
 
March 21, 2019, 11 a.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) 0.26 ppb (3) -4.0 μg/m3 (0) 6.8 μg/m3 (28) 28.0
 
March 21, 2019, 10 a.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.26 ppb (3) 2.0 μg/m3 (2) 5.5 μg/m3 (23) 23.0
 
March 21, 2019, 9 a.m. 2.8 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.27 ppb (3) 1.0 μg/m3 (1) 6.5 μg/m3 (27) 27.0
 
March 21, 2019, 8 a.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) 0.27 ppb (3) 1.0 μg/m3 (1) 6.6 μg/m3 (28) 28.0
 
March 21, 2019, 7 a.m. 2.9 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) 0.28 ppb (3) 0.0 μg/m3 (0) 5.5 μg/m3 (23) 23.0
 
March 21, 2019, 6 a.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.28 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
March 21, 2019, 5 a.m. 3.9 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.29 ppb (3) -2.0 μg/m3 (0) 4.8 μg/m3 (20) 20.0
 
March 21, 2019, 4 a.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) 0.29 ppb (3) -5.0 μg/m3 (0) 6.2 μg/m3 (26) 26.0
 
March 21, 2019, 3 a.m. 2.8 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.29 ppb (3) N/A 8.3 μg/m3 (35) 35.0
 
March 21, 2019, 2 a.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.31 ppb (3) N/A 3.8 μg/m3 (16) 26.0
 
March 21, 2019, 1 a.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.31 ppb (3) -1.0 μg/m3 (0) 4.1 μg/m3 (17) 32.0
 
March 21, 2019, midnight 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.32 ppb (4) 4.0 μg/m3 (4) 5.2 μg/m3 (22) 31.0
 
March 20, 2019, 11 p.m. 7.0 ppb (6) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.34 ppb (4) 5.0 μg/m3 (5) 4.8 μg/m3 (20) 33.0
 
March 20, 2019, 10 p.m. 6.4 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.33 ppb (4) 3.0 μg/m3 (3) 5.7 μg/m3 (24) 34.0
 
March 20, 2019, 9 p.m. 7.3 ppb (7) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.31 ppb (3) 5.0 μg/m3 (5) 5.9 μg/m3 (25) 29.0
 
March 20, 2019, 8 p.m. 27.5 ppb (25) 18.4 ppb (17) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) 0.29 ppb (3) 6.0 μg/m3 (5) 5.4 μg/m3 (23) 25.0
 
March 20, 2019, 7 p.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.28 ppb (3) 4.0 μg/m3 (4) 6.6 μg/m3 (28) 30.0
 
March 20, 2019, 6 p.m. 5.7 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.32 ppb (4) 18.0 μg/m3 (16) 9.1 μg/m3 (38) 38.0
 
March 20, 2019, 5 p.m. 5.0 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.31 ppb (3) 13.0 μg/m3 (12) 9.8 μg/m3 (41) 41.0
 
March 20, 2019, 4 p.m. 4.6 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.29 ppb (3) 11.0 μg/m3 (10) 8.2 μg/m3 (34) 34.0
 
March 20, 2019, 3 p.m. 4.0 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.29 ppb (3) 12.0 μg/m3 (11) 12.4 μg/m3 (51) 51.0
 
March 20, 2019, 2 p.m. 4.6 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.3 ppb (3) 11.0 μg/m3 (10) 12.2 μg/m3 (50) 50.0
 
March 20, 2019, 1 p.m. 4.1 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.26 ppb (3) 11.0 μg/m3 (10) 9.5 μg/m3 (40) 40.0
 
March 20, 2019, noon 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.26 ppb (3) 11.0 μg/m3 (10) 14.4 μg/m3 (55) 55.0
 
March 20, 2019, 11 a.m. 1.8 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.27 ppb (3) 8.0 μg/m3 (7) 8.5 μg/m3 (35) 35.0
 
March 20, 2019, 10 a.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.27 ppb (3) 10.0 μg/m3 (9) 10.5 μg/m3 (44) 44.0
 
March 20, 2019, 9 a.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.29 ppb (3) 12.0 μg/m3 (11) 8.8 μg/m3 (37) 37.0
 
March 20, 2019, 8 a.m. 3.7 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.29 ppb (3) 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 7 a.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) 0.31 ppb (3) 13.0 μg/m3 (12) 10.5 μg/m3 (44) 44.0
 
March 20, 2019, 6 a.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.33 ppb (4) 14.0 μg/m3 (13) 10.5 μg/m3 (44) 44.0
 
March 20, 2019, 5 a.m. 5.9 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) 0.36 ppb (4) 17.0 μg/m3 (15) 12.7 μg/m3 (51) 51.0
 
March 20, 2019, 4 a.m. 6.3 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.36 ppb (4) 19.0 μg/m3 (17) 11.5 μg/m3 (48) 48.0
 
March 20, 2019, 3 a.m. 7.5 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.37 ppb (4) 16.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 2 a.m. 6.8 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.35 ppb (4) 21.0 μg/m3 (19) 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 1 a.m. 6.9 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.34 ppb (4) 21.0 μg/m3 (19) 14.2 μg/m3 (55) 55.0
 
March 20, 2019, midnight 7.6 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 53.0 ppb (41) 0.36 ppb (4) 27.0 μg/m3 (25) 12.6 μg/m3 (51) 51.0
 
March 19, 2019, 11 p.m. 9.3 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 57.0 ppb (44) 0.35 ppb (4) 29.0 μg/m3 (26) 11.7 μg/m3 (49) 49.0
 
March 19, 2019, 10 p.m. 8.6 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 59.0 ppb (45) 0.34 ppb (4) 29.0 μg/m3 (26) 10.0 μg/m3 (42) 45.0
 
March 19, 2019, 9 p.m. 9.1 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 58.0 ppb (45) 0.34 ppb (4) 27.0 μg/m3 (25) 15.7 μg/m3 (58) 58.0
 
March 19, 2019, 8 p.m. 18.7 ppb (17) 4.0 ppb (4) N/A 15.0 ppb (14) N/A N/A 49.0 ppb (38) 0.45 ppb (5) 39.0 μg/m3 (35) 18.6 μg/m3 (64) 64.0
 
March 19, 2019, 7 p.m. 33.2 ppb (31) 8.5 ppb (8) N/A 25.0 ppb (23) N/A N/A 38.0 ppb (29) 0.53 ppb (6) 40.0 μg/m3 (36) 15.7 μg/m3 (58) 58.0
 
March 19, 2019, 6 p.m. 31.3 ppb (29) 7.8 ppb (7) N/A 23.0 ppb (21) N/A N/A 37.0 ppb (28) 0.52 ppb (6) 36.0 μg/m3 (33) 13.5 μg/m3 (53) 53.0
 
March 19, 2019, 5 p.m. 50.4 ppb (47) 17.9 ppb (17) N/A 32.0 ppb (30) N/A N/A 19.0 ppb (15) 0.65 ppb (7) 41.0 μg/m3 (37) 16.9 μg/m3 (60) 60.0
 
March 19, 2019, 4 p.m. 42.7 ppb (40) 15.0 ppb (14) N/A 28.0 ppb (26) N/A N/A 16.0 ppb (12) 0.59 ppb (7) 32.0 μg/m3 (29) 12.2 μg/m3 (50) 50.0
 
March 19, 2019, 3 p.m. 27.7 ppb (26) 7.9 ppb (7) N/A 20.0 ppb (19) N/A N/A 15.0 ppb (12) 0.5 ppb (6) 33.0 μg/m3 (30) 8.1 μg/m3 (34) 34.0
 
March 19, 2019, 2 p.m. 10.1 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) 0.38 ppb (4) 8.0 μg/m3 (7) 10.5 μg/m3 (44) 44.0
 
March 19, 2019, 1 p.m. 5.1 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.28 ppb (3) 8.0 μg/m3 (7) 4.8 μg/m3 (20) 24.0
 
March 19, 2019, noon 4.0 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.26 ppb (3) 8.0 μg/m3 (7) 6.6 μg/m3 (28) 28.0
 
March 19, 2019, 11 a.m. 7.4 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 21.0 ppb (16) 0.32 ppb (4) 10.0 μg/m3 (9) 9.8 μg/m3 (41) 41.0
 
March 19, 2019, 10 a.m. 6.7 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) 0.31 ppb (3) 11.0 μg/m3 (10) 9.3 μg/m3 (39) 39.0
 
March 19, 2019, 9 a.m. 8.3 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 23.0 ppb (18) 0.35 ppb (4) 12.0 μg/m3 (11) 11.1 μg/m3 (46) 46.0
 
March 19, 2019, 8 a.m. 7.9 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.36 ppb (4) 12.0 μg/m3 (11) 8.6 μg/m3 (36) 36.0
 
March 19, 2019, 7 a.m. 6.6 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.37 ppb (4) 15.0 μg/m3 (14) 5.2 μg/m3 (22) 23.0
 
March 19, 2019, 6 a.m. 8.4 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.39 ppb (4) 14.0 μg/m3 (13) 16.2 μg/m3 (59) 59.0
 
March 19, 2019, 5 a.m. 12.5 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.44 ppb (5) 17.0 μg/m3 (15) 10.3 μg/m3 (43) 43.0
 
March 19, 2019, 4 a.m. 13.2 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 32.0 ppb (25) 0.44 ppb (5) 18.0 μg/m3 (16) 16.2 μg/m3 (59) 59.0
 
March 19, 2019, 3 a.m. 14.3 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A 36.0 ppb (28) 0.43 ppb (5) 25.0 μg/m3 (23) 12.7 μg/m3 (51) 51.0
 
March 19, 2019, 2 a.m. 17.1 ppb (16) 0.8 ppb (1) N/A 16.0 ppb (15) N/A N/A 45.0 ppb (35) 0.43 ppb (5) 27.0 μg/m3 (25) 11.7 μg/m3 (49) 49.0
 
March 19, 2019, 1 a.m. 16.0 ppb (15) 0.9 ppb (1) N/A 15.0 ppb (14) N/A N/A 58.0 ppb (45) 0.4 ppb (4) 30.0 μg/m3 (27) 8.8 μg/m3 (37) 45.0
 
March 19, 2019, midnight 16.8 ppb (16) 1.5 ppb (1) N/A 15.0 ppb (14) N/A N/A 65.0 ppb (50) 0.42 ppb (5) 36.0 μg/m3 (33) 15.4 μg/m3 (57) 57.0
 
March 18, 2019, 11 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 74.0 ppb (57) 0.37 ppb (4) 23.0 μg/m3 (21) 10.1 μg/m3 (42) 57.0
 
March 18, 2019, 10 p.m. 11.8 ppb (11) 1.5 ppb (1) N/A 10.0 ppb (9) N/A N/A 73.0 ppb (57) 0.41 ppb (5) 30.0 μg/m3 (27) 11.7 μg/m3 (49) 57.0