AQSQID: 060711004

Site Name: Upland

Location: Upland, CA

Reporting: True, Located: True

Current AQI: 26.0

Upland CA, US: 34.0986, -117.6733

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 21, 2019, 11 a.m. 4.3 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.17 ppb (2) 13.0 μg/m3 (12) -0.7 μg/m3 (0) 26.0
 
May 21, 2019, 10 a.m. 3.8 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.16 ppb (2) 14.0 μg/m3 (13) -0.4 μg/m3 (0) 26.0
 
May 21, 2019, 9 a.m. 2.3 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 15.0 μg/m3 (14) 0.3 μg/m3 (1) 28.0
 
May 21, 2019, 8 a.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.16 ppb (2) 14.0 μg/m3 (13) 2.5 μg/m3 (10) 29.0
 
May 21, 2019, 7 a.m. 5.2 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.18 ppb (2) 17.0 μg/m3 (15) 0.1 μg/m3 (0) 26.0
 
May 21, 2019, 6 a.m. 5.8 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.2 ppb (2) 16.0 μg/m3 (15) 1.6 μg/m3 (7) 25.0
 
May 21, 2019, 5 a.m. 4.7 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.2 ppb (2) 13.0 μg/m3 (12) 0.5 μg/m3 (2) 29.0
 
May 21, 2019, 4 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.18 ppb (2) 12.0 μg/m3 (11) -1.6 μg/m3 (0) 33.0
 
May 21, 2019, 3 a.m. 5.1 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.2 ppb (2) 17.0 μg/m3 (15) 2.7 μg/m3 (11) 33.0
 
May 21, 2019, 2 a.m. 5.5 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.21 ppb (2) 18.0 μg/m3 (16) 2.5 μg/m3 (10) 34.0
 
May 21, 2019, 1 a.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.2 ppb (2) 19.0 μg/m3 (17) -0.1 μg/m3 (0) 38.0
 
May 21, 2019, midnight 4.8 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (38) 0.2 ppb (2) 19.0 μg/m3 (17) -0.1 μg/m3 (0) 38.0
 
May 20, 2019, 11 p.m. 4.4 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (42) 0.2 ppb (2) 18.0 μg/m3 (16) 0.4 μg/m3 (2) 42.0
 
May 20, 2019, 10 p.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 54.0 ppb (42) 0.21 ppb (2) 20.0 μg/m3 (18) 2.5 μg/m3 (10) 42.0
 
May 20, 2019, 9 p.m. 5.8 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (38) 0.23 ppb (3) 21.0 μg/m3 (19) 2.7 μg/m3 (11) 38.0
 
May 20, 2019, 8 p.m. 5.7 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) 0.22 ppb (2) 14.0 μg/m3 (13) 2.3 μg/m3 (10) 36.0
 
May 20, 2019, 7 p.m. 7.0 ppb (6) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.23 ppb (3) 12.0 μg/m3 (11) 1.8 μg/m3 (8) 33.0
 
May 20, 2019, 6 p.m. 6.7 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.21 ppb (2) 10.0 μg/m3 (9) 4.4 μg/m3 (18) 32.0
 
May 20, 2019, 5 p.m. 6.6 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.21 ppb (2) 8.0 μg/m3 (7) 6.1 μg/m3 (25) 31.0
 
May 20, 2019, 4 p.m. 5.9 ppb (5) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.2 ppb (2) 11.0 μg/m3 (10) 3.4 μg/m3 (14) 29.0
 
May 20, 2019, 3 p.m. 4.8 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.19 ppb (2) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 28.0
 
May 20, 2019, 2 p.m. 6.4 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.22 ppb (2) 19.0 μg/m3 (17) 0.7 μg/m3 (3) 25.0
 
May 20, 2019, 1 p.m. 8.9 ppb (8) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.24 ppb (3) 14.0 μg/m3 (13) -3.4 μg/m3 (0) 19.0
 
May 20, 2019, noon 7.2 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.22 ppb (2) 15.0 μg/m3 (14) -3.7 μg/m3 (0) 22.0
 
May 20, 2019, 11 a.m. 5.6 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.19 ppb (2) 13.0 μg/m3 (12) 2.7 μg/m3 (11) 24.0
 
May 20, 2019, 10 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.18 ppb (2) 13.0 μg/m3 (12) 4.1 μg/m3 (17) 26.0
 
May 20, 2019, 9 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 12.0 μg/m3 (11) 1.8 μg/m3 (8) 28.0
 
May 20, 2019, 8 a.m. 3.2 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 28.0
 
May 20, 2019, 7 a.m. 2.3 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) 0.17 ppb (2) 11.0 μg/m3 (10) 0.0 μg/m3 (0) 30.0
 
May 20, 2019, 6 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.17 ppb (2) 12.0 μg/m3 (11) 1.3 μg/m3 (5) 31.0
 
May 20, 2019, 5 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.18 ppb (2) 19.0 μg/m3 (17) 5.4 μg/m3 (23) 28.0
 
May 20, 2019, 4 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) 0.17 ppb (2) 13.0 μg/m3 (12) 6.4 μg/m3 (27) 31.0
 
May 20, 2019, 3 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.18 ppb (2) 22.0 μg/m3 (20) 0.3 μg/m3 (1) 32.0
 
May 20, 2019, 2 a.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.19 ppb (2) 20.0 μg/m3 (18) -0.1 μg/m3 (0) 33.0
 
May 20, 2019, 1 a.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.18 ppb (2) 12.0 μg/m3 (11) 4.6 μg/m3 (19) 37.0
 
May 20, 2019, midnight 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.17 ppb (2) 10.0 μg/m3 (9) 5.4 μg/m3 (23) 38.0
 
May 19, 2019, 11 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) 0.17 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 39.0
 
May 19, 2019, 10 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (38) 0.17 ppb (2) 4.0 μg/m3 (4) 0.1 μg/m3 (0) 38.0
 
May 19, 2019, 9 p.m. 1.0 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (35) 0.16 ppb (2) 6.0 μg/m3 (5) 1.1 μg/m3 (5) 35.0
 
May 19, 2019, 8 p.m. 1.8 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) 0.17 ppb (2) 5.0 μg/m3 (5) 0.9 μg/m3 (4) 32.0
 
May 19, 2019, 7 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.17 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 34.0
 
May 19, 2019, 6 p.m. 3.3 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.17 ppb (2) 6.0 μg/m3 (5) 7.1 μg/m3 (30) 36.0
 
May 19, 2019, 5 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.17 ppb (2) 7.0 μg/m3 (6) 1.5 μg/m3 (6) 35.0
 
May 19, 2019, 4 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.16 ppb (2) 6.0 μg/m3 (5) 0.3 μg/m3 (1) 35.0
 
May 19, 2019, 3 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) 0.18 ppb (2) 6.0 μg/m3 (5) 1.3 μg/m3 (5) 33.0
 
May 19, 2019, 2 p.m. 3.6 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.17 ppb (2) 10.0 μg/m3 (9) -1.4 μg/m3 (0) 33.0
 
May 19, 2019, 1 p.m. 3.8 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.17 ppb (2) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 30.0
 
May 19, 2019, noon 3.9 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.17 ppb (2) 11.0 μg/m3 (10) 1.3 μg/m3 (5) 29.0
 
May 19, 2019, 11 a.m. 1.4 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.16 ppb (2) 9.0 μg/m3 (8) -0.2 μg/m3 (0) 32.0
 
May 19, 2019, 10 a.m. 1.4 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) 0.16 ppb (2) 7.0 μg/m3 (6) 0.3 μg/m3 (1) 32.0
 
May 19, 2019, 9 a.m. 2.4 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.17 ppb (2) 10.0 μg/m3 (9) 2.2 μg/m3 (9) 28.0
 
May 19, 2019, 8 a.m. 4.4 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.22 ppb (2) 17.0 μg/m3 (15) 6.4 μg/m3 (27) 27.0
 
May 19, 2019, 7 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.22 ppb (2) 25.0 μg/m3 (23) 6.9 μg/m3 (29) 29.0
 
May 19, 2019, 6 a.m. 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.23 ppb (3) 20.0 μg/m3 (18) 8.6 μg/m3 (36) 36.0
 
May 19, 2019, 5 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 36.0 ppb (28) 0.24 ppb (3) 29.0 μg/m3 (26) 8.1 μg/m3 (34) 34.0
 
May 19, 2019, 4 a.m. 8.1 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.23 ppb (3) 28.0 μg/m3 (25) 6.2 μg/m3 (26) 26.0
 
May 19, 2019, 3 a.m. 8.4 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.24 ppb (3) 24.0 μg/m3 (22) 4.0 μg/m3 (17) 27.0
 
May 19, 2019, 2 a.m. 6.6 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.23 ppb (3) 27.0 μg/m3 (25) 8.4 μg/m3 (35) 35.0
 
May 19, 2019, 1 a.m. 6.1 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 50.0 ppb (38) 0.22 ppb (2) 30.0 μg/m3 (27) 11.1 μg/m3 (46) 46.0
 
May 19, 2019, midnight 4.7 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (42) 0.21 ppb (2) 28.0 μg/m3 (25) 7.9 μg/m3 (33) 42.0
 
May 18, 2019, 11 p.m. 3.3 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (45) 0.2 ppb (2) 26.0 μg/m3 (24) 10.6 μg/m3 (44) 45.0
 
May 18, 2019, 10 p.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 65.0 ppb (50) 0.23 ppb (3) 27.0 μg/m3 (25) 11.0 μg/m3 (46) 50.0
 
May 18, 2019, 9 p.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 63.0 ppb (48) 0.21 ppb (2) 15.0 μg/m3 (14) 5.9 μg/m3 (25) 48.0
 
May 18, 2019, 8 p.m. 3.4 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (45) 0.21 ppb (2) 24.0 μg/m3 (22) 6.4 μg/m3 (27) 45.0
 
May 18, 2019, 7 p.m. 5.8 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.23 ppb (3) 27.0 μg/m3 (25) 9.3 μg/m3 (39) 40.0
 
May 18, 2019, 6 p.m. 7.2 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 50.0 ppb (38) 0.25 ppb (3) 22.0 μg/m3 (20) 9.8 μg/m3 (41) 41.0
 
May 18, 2019, 5 p.m. 11.9 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A N/A 43.0 ppb (33) 0.27 ppb (3) 30.0 μg/m3 (27) 12.0 μg/m3 (50) 50.0
 
May 18, 2019, 4 p.m. 18.1 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A 32.0 ppb (25) 0.31 ppb (3) 28.0 μg/m3 (25) 16.4 μg/m3 (59) 59.0
 
May 18, 2019, 3 p.m. 20.8 ppb (19) 6.3 ppb (6) N/A 15.0 ppb (14) N/A N/A 25.0 ppb (19) 0.32 ppb (4) 30.0 μg/m3 (27) 20.2 μg/m3 (67) 67.0
 
May 18, 2019, 2 p.m. 28.7 ppb (27) 10.3 ppb (10) N/A 18.0 ppb (17) N/A N/A 16.0 ppb (12) 0.39 ppb (4) 26.0 μg/m3 (24) 9.5 μg/m3 (40) 40.0
 
May 18, 2019, 1 p.m. 26.4 ppb (24) 7.7 ppb (7) N/A 19.0 ppb (18) N/A N/A 7.0 ppb (5) 0.41 ppb (5) 15.0 μg/m3 (14) 3.9 μg/m3 (16) 24.0
 
May 18, 2019, noon 17.4 ppb (16) 1.2 ppb (1) N/A 16.0 ppb (15) N/A N/A 9.0 ppb (7) 0.37 ppb (4) 21.0 μg/m3 (19) 2.2 μg/m3 (9) 19.0
 
May 18, 2019, 11 a.m. 16.0 ppb (15) 0.7 ppb (1) N/A 15.0 ppb (14) N/A N/A 11.0 ppb (8) 0.3 ppb (3) 26.0 μg/m3 (24) 3.0 μg/m3 (12) 24.0
 
May 18, 2019, 10 a.m. 12.1 ppb (11) 0.2 ppb (0) N/A 12.0 ppb (11) N/A N/A 14.0 ppb (11) 0.28 ppb (3) 20.0 μg/m3 (18) 1.3 μg/m3 (5) 18.0
 
May 18, 2019, 9 a.m. 11.3 ppb (10) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 13.0 ppb (10) 0.34 ppb (4) 18.0 μg/m3 (16) 6.6 μg/m3 (28) 28.0
 
May 18, 2019, 8 a.m. 12.3 ppb (11) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 13.0 ppb (10) 0.32 ppb (4) 15.0 μg/m3 (14) 8.8 μg/m3 (37) 37.0
 
May 18, 2019, 7 a.m. 12.8 ppb (12) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.31 ppb (3) 27.0 μg/m3 (25) 6.8 μg/m3 (28) 28.0
 
May 18, 2019, 6 a.m. 12.1 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A N/A 22.0 ppb (17) 0.31 ppb (3) 23.0 μg/m3 (21) 5.2 μg/m3 (22) 22.0
 
May 18, 2019, 5 a.m. 10.6 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) 0.26 ppb (3) 24.0 μg/m3 (22) 5.6 μg/m3 (23) 25.0
 
May 18, 2019, 4 a.m. 9.7 ppb (9) 0.7 ppb (1) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) 0.25 ppb (3) 27.0 μg/m3 (25) 7.6 μg/m3 (32) 32.0
 
May 18, 2019, 3 a.m. 8.3 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 40.0 ppb (31) 0.24 ppb (3) 21.0 μg/m3 (19) 6.6 μg/m3 (28) 31.0
 
May 18, 2019, 2 a.m. 6.8 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.22 ppb (2) 21.0 μg/m3 (19) 2.5 μg/m3 (10) 33.0
 
May 18, 2019, 1 a.m. 4.7 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (37) 0.19 ppb (2) 22.0 μg/m3 (20) 4.5 μg/m3 (19) 37.0
 
May 18, 2019, midnight 4.7 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) 0.2 ppb (2) 21.0 μg/m3 (19) 5.9 μg/m3 (25) 41.0
 
May 17, 2019, 11 p.m. 4.4 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 56.0 ppb (43) 0.2 ppb (2) 22.0 μg/m3 (20) 4.2 μg/m3 (18) 43.0
 
May 17, 2019, 10 p.m. 5.7 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 58.0 ppb (45) 0.22 ppb (2) 26.0 μg/m3 (24) 4.9 μg/m3 (20) 45.0
 
May 17, 2019, 9 p.m. 6.6 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (41) 0.23 ppb (3) 25.0 μg/m3 (23) 2.8 μg/m3 (12) 41.0
 
May 17, 2019, 8 p.m. 4.6 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (38) 0.19 ppb (2) 21.0 μg/m3 (19) 2.3 μg/m3 (10) 38.0
 
May 17, 2019, 7 p.m. 5.3 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.19 ppb (2) 18.0 μg/m3 (16) 5.2 μg/m3 (22) 35.0
 
May 17, 2019, 6 p.m. 5.3 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.19 ppb (2) 21.0 μg/m3 (19) 7.1 μg/m3 (30) 33.0
 
May 17, 2019, 5 p.m. 7.4 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.21 ppb (2) 24.0 μg/m3 (22) 8.3 μg/m3 (35) 35.0
 
May 17, 2019, 4 p.m. 5.4 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.19 ppb (2) 20.0 μg/m3 (18) 8.1 μg/m3 (34) 34.0
 
May 17, 2019, 3 p.m. 8.9 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) 0.21 ppb (2) 29.0 μg/m3 (26) 8.1 μg/m3 (34) 34.0
 
May 17, 2019, 2 p.m. 43.8 ppb (41) 20.6 ppb (19) N/A 23.0 ppb (21) N/A N/A 7.0 ppb (5) 0.47 ppb (5) 33.0 μg/m3 (30) 4.6 μg/m3 (19) 41.0
 
May 17, 2019, 1 p.m. 31.6 ppb (29) 12.1 ppb (11) N/A 20.0 ppb (19) N/A N/A 5.0 ppb (4) 0.48 ppb (5) 24.0 μg/m3 (22) 3.4 μg/m3 (14) 29.0
 
May 17, 2019, noon 15.1 ppb (14) 3.5 ppb (3) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) 0.3 ppb (3) 21.0 μg/m3 (19) 7.3 μg/m3 (30) 30.0
 
May 17, 2019, 11 a.m. 7.4 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.24 ppb (3) 18.0 μg/m3 (16) 6.6 μg/m3 (28) 28.0
 
May 17, 2019, 10 a.m. 5.2 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.22 ppb (2) 23.0 μg/m3 (21) 3.7 μg/m3 (15) 21.0
 
May 17, 2019, 9 a.m. 3.0 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.2 ppb (2) 22.0 μg/m3 (20) 2.5 μg/m3 (10) 27.0
 
May 17, 2019, 8 a.m. 3.1 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.2 ppb (2) 23.0 μg/m3 (21) 3.5 μg/m3 (15) 28.0
 
May 17, 2019, 7 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.19 ppb (2) 21.0 μg/m3 (19) 4.9 μg/m3 (20) 28.0
 
May 17, 2019, 6 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.2 ppb (2) 18.0 μg/m3 (16) 2.7 μg/m3 (11) 28.0
 
May 17, 2019, 5 a.m. 4.5 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.21 ppb (2) 22.0 μg/m3 (20) -0.1 μg/m3 (0) 29.0
 
May 17, 2019, 4 a.m. 4.8 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.21 ppb (2) 21.0 μg/m3 (19) 0.3 μg/m3 (1) 31.0
 
May 17, 2019, 3 a.m. 3.8 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.21 ppb (2) 19.0 μg/m3 (17) 3.5 μg/m3 (15) 33.0
 
May 17, 2019, 2 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.21 ppb (2) 15.0 μg/m3 (14) 6.6 μg/m3 (28) 35.0
 
May 17, 2019, 1 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.2 ppb (2) 16.0 μg/m3 (15) 2.2 μg/m3 (9) 36.0
 
May 17, 2019, midnight 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.2 ppb (2) 22.0 μg/m3 (20) 2.1 μg/m3 (9) 37.0
 
May 16, 2019, 11 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.2 ppb (2) 31.0 μg/m3 (28) 7.4 μg/m3 (31) 38.0
 
May 16, 2019, 10 p.m. 3.0 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (39) 0.19 ppb (2) 26.0 μg/m3 (24) 11.1 μg/m3 (46) 46.0
 
May 16, 2019, 9 p.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.2 ppb (2) 23.0 μg/m3 (21) 7.9 μg/m3 (33) 38.0
 
May 16, 2019, 8 p.m. 4.8 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.2 ppb (2) 12.0 μg/m3 (11) 4.2 μg/m3 (18) 32.0
 
May 16, 2019, 7 p.m. 9.2 ppb (9) 2.5 ppb (2) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) 0.21 ppb (2) 6.0 μg/m3 (5) 3.2 μg/m3 (13) 20.0
 
May 16, 2019, 6 p.m. 7.0 ppb (6) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) 0.22 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 18.0
 
May 16, 2019, 5 p.m. 5.7 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.21 ppb (2) 4.0 μg/m3 (4) 3.5 μg/m3 (15) 20.0
 
May 16, 2019, 4 p.m. 8.0 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.23 ppb (3) 7.0 μg/m3 (6) 1.1 μg/m3 (5) 20.0
 
May 16, 2019, 3 p.m. 5.0 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.21 ppb (2) 8.0 μg/m3 (7) 2.7 μg/m3 (11) 21.0
 
May 16, 2019, 2 p.m. 5.4 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.22 ppb (2) 9.0 μg/m3 (8) 3.2 μg/m3 (13) 19.0
 
May 16, 2019, 1 p.m. 5.7 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.21 ppb (2) 12.0 μg/m3 (11) -1.1 μg/m3 (0) 19.0
 
May 16, 2019, noon 5.1 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.21 ppb (2) 14.0 μg/m3 (13) 0.6 μg/m3 (2) 21.0
 
May 16, 2019, 11 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (18) 0.2 ppb (2) 18.0 μg/m3 (16) 3.5 μg/m3 (15) 18.0
 
May 16, 2019, 10 a.m. 5.9 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.21 ppb (2) 13.0 μg/m3 (12) 5.4 μg/m3 (23) 23.0
 
May 16, 2019, 9 a.m. 6.9 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.21 ppb (2) 13.0 μg/m3 (12) 4.2 μg/m3 (18) 18.0
 
May 16, 2019, 8 a.m. 5.9 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.22 ppb (2) 14.0 μg/m3 (13) 2.5 μg/m3 (10) 18.0
 
May 16, 2019, 7 a.m. 6.8 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.22 ppb (2) 16.0 μg/m3 (15) 4.7 μg/m3 (20) 20.0
 
May 16, 2019, 6 a.m. 8.4 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.24 ppb (3) 19.0 μg/m3 (17) 5.9 μg/m3 (25) 25.0
 
May 16, 2019, 5 a.m. 7.8 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.24 ppb (3) 18.0 μg/m3 (16) 6.4 μg/m3 (27) 27.0
 
May 16, 2019, 4 a.m. 8.2 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.24 ppb (3) 17.0 μg/m3 (15) 6.4 μg/m3 (27) 27.0
 
May 16, 2019, 3 a.m. 7.7 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 33.0 ppb (25) 0.22 ppb (2) 19.0 μg/m3 (17) 4.5 μg/m3 (19) 25.0
 
May 16, 2019, 2 a.m. 9.3 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.24 ppb (3) 20.0 μg/m3 (18) 5.2 μg/m3 (22) 27.0
 
May 16, 2019, 1 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 43.0 ppb (33) 0.26 ppb (3) 20.0 μg/m3 (18) 7.4 μg/m3 (31) 33.0
 
May 16, 2019, midnight 9.3 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 47.0 ppb (36) 0.29 ppb (3) 24.0 μg/m3 (22) 11.3 μg/m3 (47) 47.0
 
May 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 31.0 μg/m3 (28) 13.5 μg/m3 (53) 53.0
 
May 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 37.0 μg/m3 (34) 11.0 μg/m3 (46) 46.0
 
May 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 31.0 μg/m3 (28) 15.9 μg/m3 (58) 58.0
 
May 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 34.0 μg/m3 (31) 14.3 μg/m3 (55) 55.0
 
May 15, 2019, 7 p.m. 13.6 ppb (13) 2.4 ppb (2) N/A 11.0 ppb (10) N/A N/A 43.0 ppb (33) 0.32 ppb (4) 34.0 μg/m3 (31) 20.6 μg/m3 (68) 68.0
 
May 15, 2019, 6 p.m. 15.7 ppb (15) 3.2 ppb (3) N/A 13.0 ppb (12) N/A N/A 36.0 ppb (28) 0.34 ppb (4) 41.0 μg/m3 (37) 18.1 μg/m3 (63) 63.0
 
May 15, 2019, 5 p.m. 23.4 ppb (22) 5.7 ppb (5) N/A 18.0 ppb (17) N/A N/A 29.0 ppb (22) 0.38 ppb (4) 50.0 μg/m3 (45) 26.2 μg/m3 (80) 80.0
 
May 15, 2019, 4 p.m. 23.8 ppb (22) 5.3 ppb (5) N/A 18.0 ppb (17) N/A N/A 25.0 ppb (19) 0.39 ppb (4) 42.0 μg/m3 (38) 24.7 μg/m3 (77) 77.0
 
May 15, 2019, 3 p.m. 20.2 ppb (19) 2.8 ppb (3) N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.4 ppb (4) 52.0 μg/m3 (47) 30.6 μg/m3 (90) 90.0
 
May 15, 2019, 2 p.m. 18.1 ppb (17) 2.2 ppb (2) N/A 16.0 ppb (15) N/A N/A 19.0 ppb (15) 0.39 ppb (4) 48.0 μg/m3 (44) 34.0 μg/m3 (97) 97.0
 
May 15, 2019, 1 p.m. 11.7 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.34 ppb (4) 37.0 μg/m3 (34) 33.5 μg/m3 (96) 96.0
 
May 15, 2019, noon 10.9 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.33 ppb (4) 39.0 μg/m3 (35) 22.1 μg/m3 (71) 71.0
 
May 15, 2019, 11 a.m. 10.9 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 28.0 ppb (22) 0.31 ppb (3) 34.0 μg/m3 (31) 19.4 μg/m3 (66) 66.0
 
May 15, 2019, 10 a.m. 11.3 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.32 ppb (4) 30.0 μg/m3 (27) 22.1 μg/m3 (71) 71.0
 
May 15, 2019, 9 a.m. 14.5 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.35 ppb (4) 36.0 μg/m3 (33) 21.4 μg/m3 (70) 70.0
 
May 15, 2019, 8 a.m. 16.1 ppb (15) 0.0 ppb (0) N/A 16.0 ppb (15) N/A N/A 19.0 ppb (15) 0.36 ppb (4) 29.0 μg/m3 (26) 18.7 μg/m3 (64) 64.0
 
May 15, 2019, 7 a.m. 16.3 ppb (15) 0.1 ppb (0) N/A 16.0 ppb (15) N/A N/A 19.0 ppb (15) 0.34 ppb (4) 26.0 μg/m3 (24) 14.0 μg/m3 (54) 54.0
 
May 15, 2019, 6 a.m. 17.1 ppb (16) 0.1 ppb (0) N/A 17.0 ppb (16) N/A N/A 26.0 ppb (20) 0.36 ppb (4) 29.0 μg/m3 (26) 12.6 μg/m3 (51) 51.0
 
May 15, 2019, 5 a.m. 16.4 ppb (15) 0.0 ppb (0) N/A 16.0 ppb (15) N/A N/A 31.0 ppb (24) 0.35 ppb (4) 28.0 μg/m3 (25) 11.8 μg/m3 (49) 49.0
 
May 15, 2019, 4 a.m. 18.1 ppb (17) 0.0 ppb (0) N/A 18.0 ppb (17) N/A N/A 32.0 ppb (25) 0.35 ppb (4) 28.0 μg/m3 (25) 11.1 μg/m3 (46) 46.0
 
May 15, 2019, 3 a.m. 18.3 ppb (17) 0.5 ppb (0) N/A 18.0 ppb (17) N/A N/A 39.0 ppb (30) 0.34 ppb (4) 32.0 μg/m3 (29) 11.8 μg/m3 (49) 49.0
 
May 15, 2019, 2 a.m. 14.7 ppb (14) 0.1 ppb (0) N/A 15.0 ppb (14) N/A N/A 50.0 ppb (38) 0.32 ppb (4) 38.0 μg/m3 (35) 13.8 μg/m3 (54) 54.0
 
May 15, 2019, 1 a.m. 14.1 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 59.0 ppb (45) 0.32 ppb (4) 43.0 μg/m3 (39) 13.7 μg/m3 (54) 54.0
 
May 15, 2019, midnight 9.6 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 74.0 ppb (57) 0.32 ppb (4) 40.0 μg/m3 (36) 8.1 μg/m3 (34) 57.0
 
May 14, 2019, 11 p.m. 8.8 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 73.0 ppb (57) 0.32 ppb (4) 38.0 μg/m3 (35) 6.6 μg/m3 (28) 57.0
 
May 14, 2019, 10 p.m. 7.5 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 75.0 ppb (58) 0.31 ppb (3) 40.0 μg/m3 (36) 10.6 μg/m3 (44) 58.0
 
May 14, 2019, 9 p.m. 10.7 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 66.0 ppb (51) 0.34 ppb (4) N/A 18.6 μg/m3 (64) 64.0
 
May 14, 2019, 8 p.m. 11.2 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 64.0 ppb (49) 0.35 ppb (4) N/A 20.1 μg/m3 (67) 67.0
 
May 14, 2019, 7 p.m. 15.2 ppb (14) 2.4 ppb (2) N/A 13.0 ppb (12) N/A N/A 49.0 ppb (38) 0.39 ppb (4) 47.0 μg/m3 (43) 18.6 μg/m3 (64) 64.0
 
May 14, 2019, 6 p.m. 21.5 ppb (20) 4.7 ppb (4) N/A 17.0 ppb (16) N/A N/A 39.0 ppb (30) 0.41 ppb (5) 54.0 μg/m3 (49) 27.5 μg/m3 (83) 83.0
 
May 14, 2019, 5 p.m. 26.5 ppb (25) 7.7 ppb (7) N/A 19.0 ppb (18) N/A N/A 28.0 ppb (22) 0.43 ppb (5) 53.0 μg/m3 (48) 33.3 μg/m3 (95) 95.0
 
May 14, 2019, 4 p.m. 27.1 ppb (25) 6.9 ppb (6) N/A 20.0 ppb (19) N/A N/A 21.0 ppb (16) 0.42 ppb (5) 55.0 μg/m3 (50) 37.6 μg/m3 (105) 105.0
 
May 14, 2019, 3 p.m. 26.3 ppb (24) 5.3 ppb (5) N/A 21.0 ppb (19) N/A N/A 15.0 ppb (12) 0.41 ppb (5) N/A 39.1 μg/m3 (109) 109.0
 
May 14, 2019, 2 p.m. 19.5 ppb (18) 2.8 ppb (3) N/A 17.0 ppb (16) N/A N/A 16.0 ppb (12) 0.4 ppb (4) N/A 31.3 μg/m3 (91) 91.0
 
May 14, 2019, 1 p.m. 9.8 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 22.0 ppb (17) 0.34 ppb (4) N/A 28.4 μg/m3 (85) 85.0
 
May 14, 2019, noon 8.8 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 23.0 ppb (18) 0.31 ppb (3) N/A 23.8 μg/m3 (75) 75.0