AQSQID: 060711004

Site Name: Upland

Location: Upland, CA

Reporting: True, Located: True

Current AQI: 17.0

Upland CA, US: 34.0986, -117.6733

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 24, 2019, 1 p.m. 10.1 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 16.0 ppb (12) 0.34 ppb (4) 13.0 μg/m3 (12) 4.1 μg/m3 (17) 17.0
 
March 24, 2019, noon 6.6 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) 0.32 ppb (4) 12.0 μg/m3 (11) 5.6 μg/m3 (23) 23.0
 
March 24, 2019, 11 a.m. 4.3 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) 0.23 ppb (3) 13.0 μg/m3 (12) 4.7 μg/m3 (20) 20.0
 
March 24, 2019, 10 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.23 ppb (3) 18.0 μg/m3 (16) 5.4 μg/m3 (23) 23.0
 
March 24, 2019, 9 a.m. 6.8 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 21.0 ppb (16) 0.26 ppb (3) 10.0 μg/m3 (9) 5.4 μg/m3 (23) 23.0
 
March 24, 2019, 8 a.m. 7.4 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.27 ppb (3) 12.0 μg/m3 (11) 4.4 μg/m3 (18) 18.0
 
March 24, 2019, 7 a.m. 5.0 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.25 ppb (3) 15.0 μg/m3 (14) 4.7 μg/m3 (20) 22.0
 
March 24, 2019, 6 a.m. 5.7 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) 0.25 ppb (3) 16.0 μg/m3 (15) 2.1 μg/m3 (9) 22.0
 
March 24, 2019, 5 a.m. 6.9 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.25 ppb (3) 13.0 μg/m3 (12) 0.6 μg/m3 (2) 22.0
 
March 24, 2019, 4 a.m. 8.0 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 27.0 ppb (21) 0.26 ppb (3) 12.0 μg/m3 (11) 3.7 μg/m3 (15) 21.0
 
March 24, 2019, 3 a.m. 8.2 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.28 ppb (3) 12.0 μg/m3 (11) 4.6 μg/m3 (19) 22.0
 
March 24, 2019, 2 a.m. 7.8 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.29 ppb (3) 20.0 μg/m3 (18) 3.2 μg/m3 (13) 28.0
 
March 24, 2019, 1 a.m. 6.8 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.29 ppb (3) 20.0 μg/m3 (18) 2.7 μg/m3 (11) 35.0
 
March 24, 2019, midnight 5.8 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) 0.27 ppb (3) 20.0 μg/m3 (18) 5.7 μg/m3 (24) 36.0
 
March 23, 2019, 11 p.m. 6.0 ppb (6) 0.4 ppb (0) N/A 6.0 ppb (6) N/A N/A 50.0 ppb (38) 0.28 ppb (3) 28.0 μg/m3 (25) 6.4 μg/m3 (27) 38.0
 
March 23, 2019, 10 p.m. 5.7 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.28 ppb (3) 23.0 μg/m3 (21) 5.9 μg/m3 (25) 40.0
 
March 23, 2019, 9 p.m. 4.4 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) 0.26 ppb (3) 12.0 μg/m3 (11) 6.4 μg/m3 (27) 40.0
 
March 23, 2019, 8 p.m. 4.4 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.25 ppb (3) 18.0 μg/m3 (16) 5.4 μg/m3 (23) 35.0
 
March 23, 2019, 7 p.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.26 ppb (3) 17.0 μg/m3 (15) 6.6 μg/m3 (28) 31.0
 
March 23, 2019, 6 p.m. 9.8 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.31 ppb (3) 21.0 μg/m3 (19) 7.5 μg/m3 (31) 31.0
 
March 23, 2019, 5 p.m. 7.7 ppb (7) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.28 ppb (3) 30.0 μg/m3 (27) 10.0 μg/m3 (42) 42.0
 
March 23, 2019, 4 p.m. 7.9 ppb (7) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.28 ppb (3) 16.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
March 23, 2019, 3 p.m. 9.4 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.32 ppb (4) 22.0 μg/m3 (20) 6.8 μg/m3 (28) 28.0
 
March 23, 2019, 2 p.m. 18.3 ppb (17) 2.0 ppb (2) N/A 16.0 ppb (15) N/A N/A 15.0 ppb (12) 0.41 ppb (5) 30.0 μg/m3 (27) 4.8 μg/m3 (20) 27.0
 
March 23, 2019, 1 p.m. 17.1 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A N/A 7.0 ppb (5) 0.42 ppb (5) 19.0 μg/m3 (17) 7.5 μg/m3 (31) 31.0
 
March 23, 2019, noon 19.3 ppb (18) 2.3 ppb (2) N/A 17.0 ppb (16) N/A N/A 5.0 ppb (4) 0.44 ppb (5) 24.0 μg/m3 (22) 11.0 μg/m3 (46) 46.0
 
March 23, 2019, 11 a.m. 17.9 ppb (17) 1.1 ppb (1) N/A 17.0 ppb (16) N/A N/A 4.0 ppb (3) 0.47 ppb (5) 25.0 μg/m3 (23) 11.0 μg/m3 (46) 46.0
 
March 23, 2019, 10 a.m. 18.8 ppb (17) 1.3 ppb (1) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.48 ppb (5) 19.0 μg/m3 (17) 8.7 μg/m3 (36) 36.0
 
March 23, 2019, 9 a.m. 20.7 ppb (19) 2.3 ppb (2) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.58 ppb (6) 37.0 μg/m3 (34) 4.1 μg/m3 (17) 34.0
 
March 23, 2019, 8 a.m. 22.0 ppb (20) 2.7 ppb (3) N/A 19.0 ppb (18) N/A N/A 4.0 ppb (3) 0.56 ppb (6) 19.0 μg/m3 (17) 3.4 μg/m3 (14) 20.0
 
March 23, 2019, 7 a.m. 20.1 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A N/A 9.0 ppb (7) 0.46 ppb (5) 20.0 μg/m3 (18) 7.3 μg/m3 (30) 30.0
 
March 23, 2019, 6 a.m. 26.9 ppb (25) 3.9 ppb (4) N/A 23.0 ppb (21) N/A N/A 10.0 ppb (8) 0.48 ppb (5) 17.0 μg/m3 (15) 6.8 μg/m3 (28) 28.0
 
March 23, 2019, 5 a.m. 15.4 ppb (14) 0.2 ppb (0) N/A 15.0 ppb (14) N/A N/A 26.0 ppb (20) 0.36 ppb (4) 20.0 μg/m3 (18) 6.1 μg/m3 (25) 25.0
 
March 23, 2019, 4 a.m. 14.2 ppb (13) 0.3 ppb (0) N/A 14.0 ppb (13) N/A N/A 28.0 ppb (22) 0.34 ppb (4) 21.0 μg/m3 (19) 4.9 μg/m3 (20) 22.0
 
March 23, 2019, 3 a.m. 12.0 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A N/A 34.0 ppb (26) 0.31 ppb (3) 20.0 μg/m3 (18) 2.3 μg/m3 (10) 26.0
 
March 23, 2019, 2 a.m. 11.5 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 40.0 ppb (31) 0.31 ppb (3) 18.0 μg/m3 (16) -0.4 μg/m3 (0) 31.0
 
March 23, 2019, 1 a.m. 10.7 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 42.0 ppb (32) 0.29 ppb (3) 20.0 μg/m3 (18) 3.2 μg/m3 (13) 32.0
 
March 23, 2019, midnight 10.7 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 48.0 ppb (37) 0.32 ppb (4) 28.0 μg/m3 (25) 9.1 μg/m3 (38) 38.0
 
March 22, 2019, 11 p.m. 8.2 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 50.0 ppb (38) 0.3 ppb (3) 20.0 μg/m3 (18) 6.9 μg/m3 (29) 38.0
 
March 22, 2019, 10 p.m. 8.6 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 49.0 ppb (38) 0.28 ppb (3) 16.0 μg/m3 (15) 4.2 μg/m3 (18) 38.0
 
March 22, 2019, 9 p.m. 9.5 ppb (9) 1.7 ppb (2) N/A 8.0 ppb (7) N/A N/A 46.0 ppb (35) 0.28 ppb (3) 19.0 μg/m3 (17) 4.7 μg/m3 (20) 35.0
 
March 22, 2019, 8 p.m. 8.7 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A 45.0 ppb (35) 0.27 ppb (3) 20.0 μg/m3 (18) 2.2 μg/m3 (9) 35.0
 
March 22, 2019, 7 p.m. 8.2 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.27 ppb (3) 85.0 μg/m3 (65) 0.1 μg/m3 (0) 65.0
 
March 22, 2019, 6 p.m. 8.2 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.26 ppb (3) 10.0 μg/m3 (9) 17.6 μg/m3 (62) 62.0
 
March 22, 2019, 5 p.m. 12.1 ppb (11) 2.9 ppb (3) N/A 9.0 ppb (8) N/A N/A 38.0 ppb (29) 0.28 ppb (3) 20.0 μg/m3 (18) 11.2 μg/m3 (47) 47.0
 
March 22, 2019, 4 p.m. 22.0 ppb (20) 5.7 ppb (5) N/A 16.0 ppb (15) N/A N/A 28.0 ppb (22) 0.33 ppb (4) 17.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 3 p.m. 35.9 ppb (33) 12.1 ppb (11) N/A 24.0 ppb (22) N/A N/A 13.0 ppb (10) 0.48 ppb (5) 24.0 μg/m3 (22) 17.1 μg/m3 (61) 61.0
 
March 22, 2019, 2 p.m. 40.2 ppb (37) 19.0 ppb (18) N/A 21.0 ppb (19) N/A N/A 4.0 ppb (3) 0.61 ppb (7) 25.0 μg/m3 (23) 8.0 μg/m3 (33) 37.0
 
March 22, 2019, 1 p.m. 22.9 ppb (21) 5.1 ppb (5) N/A 18.0 ppb (17) N/A N/A 6.0 ppb (5) 0.56 ppb (6) 24.0 μg/m3 (22) 9.7 μg/m3 (40) 40.0
 
March 22, 2019, noon 18.5 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A 14.0 ppb (11) 0.45 ppb (5) 21.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 11 a.m. 11.8 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 24.0 ppb (18) 0.34 ppb (4) 20.0 μg/m3 (18) 8.8 μg/m3 (37) 37.0
 
March 22, 2019, 10 a.m. 9.9 ppb (9) 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.29 ppb (3) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 9 a.m. 6.5 ppb (6) -0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 33.0 ppb (25) 0.26 ppb (3) 13.0 μg/m3 (12) 4.1 μg/m3 (17) 25.0
 
March 22, 2019, 8 a.m. 7.8 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.27 ppb (3) 13.0 μg/m3 (12) -1.2 μg/m3 (0) 25.0
 
March 22, 2019, 7 a.m. 7.7 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.26 ppb (3) 13.0 μg/m3 (12) -0.7 μg/m3 (0) 25.0
 
March 22, 2019, 6 a.m. 7.1 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.26 ppb (3) 11.0 μg/m3 (10) 1.5 μg/m3 (6) 26.0
 
March 22, 2019, 5 a.m. 10.1 ppb (9) 0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.28 ppb (3) N/A 2.3 μg/m3 (10) 22.0
 
March 22, 2019, 4 a.m. 12.8 ppb (12) 0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.3 ppb (3) 12.0 μg/m3 (11) 0.3 μg/m3 (1) 22.0
 
March 22, 2019, 3 a.m. 10.6 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) 0.29 ppb (3) 14.0 μg/m3 (13) -0.7 μg/m3 (0) 25.0
 
March 22, 2019, 2 a.m. 7.9 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.26 ppb (3) 12.0 μg/m3 (11) -0.7 μg/m3 (0) 28.0
 
March 22, 2019, 1 a.m. 7.9 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.27 ppb (3) 8.0 μg/m3 (7) -0.7 μg/m3 (0) 32.0
 
March 22, 2019, midnight 7.3 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.27 ppb (3) 9.0 μg/m3 (8) 0.1 μg/m3 (0) 34.0
 
March 21, 2019, 11 p.m. 7.2 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.27 ppb (3) 12.0 μg/m3 (11) -0.4 μg/m3 (0) 34.0
 
March 21, 2019, 10 p.m. 7.2 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.26 ppb (3) 9.0 μg/m3 (8) 0.3 μg/m3 (1) 35.0
 
March 21, 2019, 9 p.m. 6.5 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.25 ppb (3) 10.0 μg/m3 (9) 0.3 μg/m3 (1) 34.0
 
March 21, 2019, 8 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.25 ppb (3) 12.0 μg/m3 (11) 1.0 μg/m3 (4) 32.0
 
March 21, 2019, 7 p.m. 7.9 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.26 ppb (3) 10.0 μg/m3 (9) 5.1 μg/m3 (21) 32.0
 
March 21, 2019, 6 p.m. 6.7 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.25 ppb (3) 12.0 μg/m3 (11) 6.3 μg/m3 (26) 32.0
 
March 21, 2019, 5 p.m. 8.7 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 38.0 ppb (29) 0.25 ppb (3) 14.0 μg/m3 (13) 3.0 μg/m3 (12) 29.0
 
March 21, 2019, 4 p.m. 10.3 ppb (10) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.28 ppb (3) 13.0 μg/m3 (12) 5.3 μg/m3 (22) 26.0
 
March 21, 2019, 3 p.m. 11.4 ppb (11) 1.2 ppb (1) N/A 10.0 ppb (9) N/A N/A 33.0 ppb (25) 0.29 ppb (3) 21.0 μg/m3 (19) 7.5 μg/m3 (31) 31.0
 
March 21, 2019, 2 p.m. 12.7 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) 0.31 ppb (3) N/A 2.2 μg/m3 (9) 22.0
 
March 21, 2019, 1 p.m. 10.8 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.27 ppb (3) 27.0 μg/m3 (25) -0.5 μg/m3 (0) 25.0
 
March 21, 2019, noon 8.9 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) 0.25 ppb (3) 24.0 μg/m3 (22) 0.0 μg/m3 (0) 24.0
 
March 21, 2019, 11 a.m. 7.2 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.25 ppb (3) 19.0 μg/m3 (17) 2.2 μg/m3 (9) 24.0
 
March 21, 2019, 10 a.m. 7.7 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.27 ppb (3) 24.0 μg/m3 (22) 0.5 μg/m3 (2) 22.0
 
March 21, 2019, 9 a.m. 9.5 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.28 ppb (3) 19.0 μg/m3 (17) -2.2 μg/m3 (0) 21.0
 
March 21, 2019, 8 a.m. 10.2 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.29 ppb (3) 21.0 μg/m3 (19) 3.2 μg/m3 (13) 21.0
 
March 21, 2019, 7 a.m. 17.5 ppb (16) 0.5 ppb (0) N/A 17.0 ppb (16) N/A N/A 20.0 ppb (15) 0.37 ppb (4) 29.0 μg/m3 (26) 6.6 μg/m3 (28) 28.0
 
March 21, 2019, 6 a.m. 25.4 ppb (24) 0.8 ppb (1) N/A 25.0 ppb (23) N/A N/A 10.0 ppb (8) 0.42 ppb (5) 18.0 μg/m3 (16) 7.3 μg/m3 (30) 30.0
 
March 21, 2019, 5 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) 0.38 ppb (4) 13.0 μg/m3 (12) 5.1 μg/m3 (21) 21.0
 
March 21, 2019, 4 a.m. 18.3 ppb (17) 0.8 ppb (1) N/A 18.0 ppb (17) N/A N/A 20.0 ppb (15) 0.36 ppb (4) 12.0 μg/m3 (11) -2.9 μg/m3 (0) 17.0
 
March 21, 2019, 3 a.m. 15.4 ppb (14) 0.8 ppb (1) N/A 15.0 ppb (14) N/A N/A 26.0 ppb (20) 0.33 ppb (4) 12.0 μg/m3 (11) -2.1 μg/m3 (0) 20.0
 
March 21, 2019, 2 a.m. 13.2 ppb (12) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) 0.31 ppb (3) 13.0 μg/m3 (12) 2.5 μg/m3 (10) 22.0
 
March 21, 2019, 1 a.m. 5.7 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.25 ppb (3) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 35.0
 
March 21, 2019, midnight 9.7 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.3 ppb (3) 8.0 μg/m3 (7) 2.8 μg/m3 (12) 30.0
 
March 20, 2019, 11 p.m. 10.9 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 38.0 ppb (29) 0.29 ppb (3) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 29.0
 
March 20, 2019, 10 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.25 ppb (3) 2.0 μg/m3 (2) -1.1 μg/m3 (0) 32.0
 
March 20, 2019, 9 p.m. 7.5 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.27 ppb (3) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 32.0
 
March 20, 2019, 8 p.m. 9.9 ppb (9) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.27 ppb (3) 12.0 μg/m3 (11) 6.9 μg/m3 (29) 30.0
 
March 20, 2019, 7 p.m. 8.6 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.26 ppb (3) 20.0 μg/m3 (18) 5.0 μg/m3 (21) 34.0
 
March 20, 2019, 6 p.m. 9.0 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.25 ppb (3) 15.0 μg/m3 (14) 8.1 μg/m3 (34) 34.0
 
March 20, 2019, 5 p.m. 10.4 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 38.0 ppb (29) 0.27 ppb (3) 16.0 μg/m3 (15) 9.1 μg/m3 (38) 38.0
 
March 20, 2019, 4 p.m. 12.7 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.29 ppb (3) 19.0 μg/m3 (17) 6.6 μg/m3 (28) 28.0
 
March 20, 2019, 3 p.m. 13.1 ppb (12) 2.4 ppb (2) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.3 ppb (3) 22.0 μg/m3 (20) 6.1 μg/m3 (25) 25.0
 
March 20, 2019, 2 p.m. 11.6 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.29 ppb (3) 22.0 μg/m3 (20) 7.8 μg/m3 (32) 32.0
 
March 20, 2019, 1 p.m. 9.4 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) 0.27 ppb (3) 18.0 μg/m3 (16) 9.3 μg/m3 (39) 39.0
 
March 20, 2019, noon 10.3 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.31 ppb (3) 17.0 μg/m3 (15) 4.6 μg/m3 (19) 21.0
 
March 20, 2019, 11 a.m. 5.2 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.26 ppb (3) 19.0 μg/m3 (17) 1.5 μg/m3 (6) 28.0
 
March 20, 2019, 10 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.21 ppb (2) 15.0 μg/m3 (14) 5.4 μg/m3 (23) 32.0
 
March 20, 2019, 9 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.23 ppb (3) 19.0 μg/m3 (17) 4.4 μg/m3 (18) 29.0
 
March 20, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.23 ppb (3) 20.0 μg/m3 (18) 2.5 μg/m3 (10) 32.0
 
March 20, 2019, 7 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.22 ppb (2) 17.0 μg/m3 (15) 3.5 μg/m3 (15) 33.0
 
March 20, 2019, 6 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.24 ppb (3) 19.0 μg/m3 (17) 5.9 μg/m3 (25) 32.0
 
March 20, 2019, 5 a.m. 5.3 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.26 ppb (3) 24.0 μg/m3 (22) 5.4 μg/m3 (23) 30.0
 
March 20, 2019, 4 a.m. 7.5 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.28 ppb (3) 22.0 μg/m3 (20) 4.7 μg/m3 (20) 28.0
 
March 20, 2019, 3 a.m. 10.5 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.32 ppb (4) 27.0 μg/m3 (25) 6.4 μg/m3 (27) 27.0
 
March 20, 2019, 2 a.m. 9.7 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 38.0 ppb (29) 0.29 ppb (3) 30.0 μg/m3 (27) 6.1 μg/m3 (25) 29.0
 
March 20, 2019, 1 a.m. 10.1 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 44.0 ppb (34) 0.3 ppb (3) 24.0 μg/m3 (22) 7.4 μg/m3 (31) 34.0
 
March 20, 2019, midnight 8.7 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 54.0 ppb (42) 0.29 ppb (3) N/A 6.9 μg/m3 (29) 42.0
 
March 19, 2019, 11 p.m. 7.2 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 59.0 ppb (45) 0.29 ppb (3) 150.0 μg/m3 (98) 5.6 μg/m3 (23) 98.0
 
March 19, 2019, 10 p.m. 6.5 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 61.0 ppb (47) 0.29 ppb (3) N/A 16.4 μg/m3 (59) 59.0
 
March 19, 2019, 9 p.m. 8.7 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 61.0 ppb (47) 0.32 ppb (4) N/A 12.5 μg/m3 (51) 51.0
 
March 19, 2019, 8 p.m. 15.0 ppb (14) 2.3 ppb (2) N/A 13.0 ppb (12) N/A N/A 55.0 ppb (42) 0.38 ppb (4) N/A 10.1 μg/m3 (42) 42.0
 
March 19, 2019, 7 p.m. 19.2 ppb (18) 3.4 ppb (3) N/A 16.0 ppb (15) N/A N/A 51.0 ppb (39) 0.35 ppb (4) N/A N/A 39.0
 
March 19, 2019, 6 p.m. 19.6 ppb (18) 3.2 ppb (3) N/A 16.0 ppb (15) N/A N/A 49.0 ppb (38) 0.38 ppb (4) N/A N/A 38.0
 
March 19, 2019, 5 p.m. 40.4 ppb (37) 12.1 ppb (11) N/A 28.0 ppb (26) N/A N/A 30.0 ppb (23) 0.52 ppb (6) 44.0 μg/m3 (40) 11.3 μg/m3 (47) 47.0
 
March 19, 2019, 4 p.m. 32.2 ppb (30) 7.9 ppb (7) N/A 24.0 ppb (22) N/A N/A 27.0 ppb (21) 0.43 ppb (5) 32.0 μg/m3 (29) 9.3 μg/m3 (39) 39.0
 
March 19, 2019, 3 p.m. 48.8 ppb (45) 17.8 ppb (16) N/A 31.0 ppb (29) N/A N/A 15.0 ppb (12) 0.62 ppb (7) 38.0 μg/m3 (35) 10.3 μg/m3 (43) 45.0
 
March 19, 2019, 2 p.m. 68.1 ppb (65) 30.3 ppb (28) N/A 38.0 ppb (35) N/A N/A 3.0 ppb (2) 0.9 ppb (10) 47.0 μg/m3 (43) 8.8 μg/m3 (37) 65.0
 
March 19, 2019, 1 p.m. 51.9 ppb (48) 15.3 ppb (14) N/A 37.0 ppb (34) N/A N/A 2.0 ppb (2) 0.72 ppb (8) 48.0 μg/m3 (44) 8.1 μg/m3 (34) 48.0
 
March 19, 2019, noon 43.8 ppb (41) 9.7 ppb (9) N/A 34.0 ppb (31) N/A N/A 4.0 ppb (3) 0.66 ppb (7) 47.0 μg/m3 (43) 6.4 μg/m3 (27) 43.0
 
March 19, 2019, 11 a.m. 25.9 ppb (24) 1.2 ppb (1) N/A 25.0 ppb (23) N/A N/A 10.0 ppb (8) 0.42 ppb (5) 28.0 μg/m3 (25) 2.3 μg/m3 (10) 25.0
 
March 19, 2019, 10 a.m. 21.4 ppb (20) 0.3 ppb (0) N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.38 ppb (4) 28.0 μg/m3 (25) 5.6 μg/m3 (23) 25.0
 
March 19, 2019, 9 a.m. 19.1 ppb (18) 0.6 ppb (1) N/A 19.0 ppb (18) N/A N/A 17.0 ppb (13) 0.39 ppb (4) 19.0 μg/m3 (17) 8.6 μg/m3 (36) 36.0
 
March 19, 2019, 8 a.m. 24.2 ppb (22) 2.0 ppb (2) N/A 22.0 ppb (20) N/A N/A 13.0 ppb (10) 0.46 ppb (5) 23.0 μg/m3 (21) 4.9 μg/m3 (20) 22.0
 
March 19, 2019, 7 a.m. 22.2 ppb (21) 0.5 ppb (0) N/A 22.0 ppb (20) N/A N/A 16.0 ppb (12) 0.44 ppb (5) 29.0 μg/m3 (26) 6.1 μg/m3 (25) 26.0
 
March 19, 2019, 6 a.m. 26.1 ppb (24) 1.1 ppb (1) N/A 25.0 ppb (23) N/A N/A 15.0 ppb (12) 0.49 ppb (5) 32.0 μg/m3 (29) 7.6 μg/m3 (32) 32.0
 
March 19, 2019, 5 a.m. 22.3 ppb (21) 0.6 ppb (1) N/A 22.0 ppb (20) N/A N/A 27.0 ppb (21) 0.48 ppb (5) 29.0 μg/m3 (26) 6.9 μg/m3 (29) 29.0
 
March 19, 2019, 4 a.m. 21.7 ppb (20) 1.1 ppb (1) N/A 21.0 ppb (19) N/A N/A 34.0 ppb (26) 0.4 ppb (4) 31.0 μg/m3 (28) 5.6 μg/m3 (23) 28.0
 
March 19, 2019, 3 a.m. 17.6 ppb (16) 0.5 ppb (0) N/A 17.0 ppb (16) N/A N/A 43.0 ppb (33) 0.36 ppb (4) 27.0 μg/m3 (25) 5.1 μg/m3 (21) 33.0
 
March 19, 2019, 2 a.m. 14.1 ppb (13) 0.3 ppb (0) N/A 14.0 ppb (13) N/A N/A 51.0 ppb (39) 0.35 ppb (4) 25.0 μg/m3 (23) 1.8 μg/m3 (8) 39.0
 
March 19, 2019, 1 a.m. 11.9 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A 57.0 ppb (44) 0.32 ppb (4) 29.0 μg/m3 (26) 0.3 μg/m3 (1) 44.0
 
March 19, 2019, midnight 8.6 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 63.0 ppb (48) 0.29 ppb (3) 24.0 μg/m3 (22) 2.5 μg/m3 (10) 48.0
 
March 18, 2019, 11 p.m. 6.1 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 68.0 ppb (52) 0.27 ppb (3) 29.0 μg/m3 (26) 4.2 μg/m3 (18) 52.0
 
March 18, 2019, 10 p.m. 9.6 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 65.0 ppb (50) 0.32 ppb (4) 25.0 μg/m3 (23) 3.2 μg/m3 (13) 50.0
 
March 18, 2019, 9 p.m. 6.8 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 58.0 ppb (45) 0.26 ppb (3) 28.0 μg/m3 (25) -2.7 μg/m3 (0) 45.0
 
March 18, 2019, 8 p.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) 0.22 ppb (2) 10.0 μg/m3 (9) -3.4 μg/m3 (0) 41.0
 
March 18, 2019, 7 p.m. 6.1 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (38) 0.24 ppb (3) 19.0 μg/m3 (17) 2.3 μg/m3 (10) 38.0
 
March 18, 2019, 6 p.m. 32.2 ppb (30) 9.5 ppb (9) N/A 23.0 ppb (21) N/A N/A 34.0 ppb (26) 0.38 ppb (4) 37.0 μg/m3 (34) 4.6 μg/m3 (19) 34.0
 
March 18, 2019, 5 p.m. 49.6 ppb (46) 17.4 ppb (16) N/A 32.0 ppb (30) N/A N/A 22.0 ppb (17) 0.53 ppb (6) 54.0 μg/m3 (49) 5.9 μg/m3 (25) 49.0
 
March 18, 2019, 4 p.m. 45.2 ppb (42) 15.8 ppb (15) N/A 29.0 ppb (27) N/A N/A 21.0 ppb (16) 0.58 ppb (6) 44.0 μg/m3 (40) 4.4 μg/m3 (18) 42.0
 
March 18, 2019, 3 p.m. 38.1 ppb (35) 14.8 ppb (14) N/A 23.0 ppb (21) N/A N/A 20.0 ppb (15) 0.68 ppb (8) 32.0 μg/m3 (29) 3.9 μg/m3 (16) 35.0
 
March 18, 2019, 2 p.m. 59.8 ppb (56) 24.2 ppb (22) N/A 36.0 ppb (33) N/A N/A 5.0 ppb (4) 0.71 ppb (8) 40.0 μg/m3 (36) 6.1 μg/m3 (25) 56.0
 
March 18, 2019, 1 p.m. 43.1 ppb (40) 11.1 ppb (10) N/A 32.0 ppb (30) N/A N/A 4.0 ppb (3) 0.61 ppb (7) 27.0 μg/m3 (25) 5.1 μg/m3 (21) 40.0
 
March 18, 2019, noon 34.6 ppb (32) 5.1 ppb (5) N/A 29.0 ppb (27) N/A N/A 7.0 ppb (5) 0.53 ppb (6) 27.0 μg/m3 (25) 7.1 μg/m3 (30) 32.0
 
March 18, 2019, 11 a.m. 18.7 ppb (17) 0.4 ppb (0) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) 0.54 ppb (6) 58.0 μg/m3 (52) 6.4 μg/m3 (27) 52.0
 
March 18, 2019, 10 a.m. 16.5 ppb (15) 0.2 ppb (0) N/A 16.0 ppb (15) N/A N/A 18.0 ppb (14) 0.51 ppb (6) 16.0 μg/m3 (15) 3.7 μg/m3 (15) 15.0
 
March 18, 2019, 9 a.m. 18.1 ppb (17) 0.4 ppb (0) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) 0.38 ppb (4) 25.0 μg/m3 (23) 4.4 μg/m3 (18) 23.0
 
March 18, 2019, 8 a.m. 15.0 ppb (14) 0.5 ppb (0) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.42 ppb (5) 27.0 μg/m3 (25) 6.4 μg/m3 (27) 27.0
 
March 18, 2019, 7 a.m. 17.2 ppb (16) 0.6 ppb (1) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.54 ppb (6) 29.0 μg/m3 (26) 6.4 μg/m3 (27) 27.0
 
March 18, 2019, 6 a.m. 16.9 ppb (16) 0.2 ppb (0) N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) 0.44 ppb (5) 25.0 μg/m3 (23) 10.6 μg/m3 (44) 44.0
 
March 18, 2019, 5 a.m. 24.2 ppb (22) 1.0 ppb (1) N/A 23.0 ppb (21) N/A N/A 23.0 ppb (18) 0.51 ppb (6) 32.0 μg/m3 (29) 10.1 μg/m3 (42) 42.0
 
March 18, 2019, 4 a.m. 20.9 ppb (19) 0.5 ppb (0) N/A 20.0 ppb (19) N/A N/A 31.0 ppb (24) 0.46 ppb (5) 29.0 μg/m3 (26) 3.0 μg/m3 (12) 26.0
 
March 18, 2019, 3 a.m. 18.7 ppb (17) 1.2 ppb (1) N/A 18.0 ppb (17) N/A N/A 41.0 ppb (32) 0.4 ppb (4) 24.0 μg/m3 (22) 2.9 μg/m3 (12) 32.0
 
March 18, 2019, 2 a.m. 15.7 ppb (15) 0.2 ppb (0) N/A 16.0 ppb (15) N/A N/A 49.0 ppb (38) 0.38 ppb (4) 28.0 μg/m3 (25) 0.1 μg/m3 (0) 38.0
 
March 18, 2019, 1 a.m. 8.6 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 59.0 ppb (45) 0.31 ppb (3) 30.0 μg/m3 (27) -0.2 μg/m3 (0) 45.0
 
March 18, 2019, midnight 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (44) 0.24 ppb (3) 22.0 μg/m3 (20) 3.4 μg/m3 (14) 44.0
 
March 17, 2019, 11 p.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) 0.22 ppb (2) 18.0 μg/m3 (16) 4.4 μg/m3 (18) 43.0
 
March 17, 2019, 10 p.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) 0.22 ppb (2) 12.0 μg/m3 (11) -0.7 μg/m3 (0) 43.0
 
March 17, 2019, 9 p.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (42) 0.21 ppb (2) 15.0 μg/m3 (14) -3.6 μg/m3 (0) 42.0
 
March 17, 2019, 8 p.m. 5.6 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (41) 0.23 ppb (3) 22.0 μg/m3 (20) -0.7 μg/m3 (0) 41.0
 
March 17, 2019, 7 p.m. 10.2 ppb (9) 1.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 50.0 ppb (38) 0.28 ppb (3) 22.0 μg/m3 (20) 0.1 μg/m3 (0) 38.0
 
March 17, 2019, 6 p.m. 10.8 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A 45.0 ppb (35) 0.3 ppb (3) 21.0 μg/m3 (19) 2.0 μg/m3 (8) 35.0
 
March 17, 2019, 5 p.m. 12.0 ppb (11) 2.6 ppb (2) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.32 ppb (4) 19.0 μg/m3 (17) 1.6 μg/m3 (7) 30.0
 
March 17, 2019, 4 p.m. 11.1 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) 0.3 ppb (3) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 28.0
 
March 17, 2019, 3 p.m. 17.4 ppb (16) 3.9 ppb (4) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) 0.41 ppb (5) 20.0 μg/m3 (18) 2.7 μg/m3 (11) 21.0
 
March 17, 2019, 2 p.m. 23.7 ppb (22) 3.8 ppb (4) N/A 20.0 ppb (19) N/A N/A 15.0 ppb (12) 0.58 ppb (6) 21.0 μg/m3 (19) 0.3 μg/m3 (1) 22.0