AQSQID: 061010003

Site Name: Yuba City

Location: Yuba City, CA

Reporting: True, Located: True

Current AQI: 29.0

Yuba City CA, US: 39.1389, -121.6175

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2019, 9 p.m. 3.6 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A 21.0 μg/m3 (19) N/A 29.0
 
May 25, 2019, 8 p.m. 3.6 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A 22.0 μg/m3 (20) N/A 28.0
 
May 25, 2019, 7 p.m. 3.8 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A 17.0 μg/m3 (15) N/A 24.0
 
May 25, 2019, 6 p.m. 5.1 ppb (5) 2.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 19.0 μg/m3 (17) N/A 19.0
 
May 25, 2019, 5 p.m. 4.5 ppb (4) 2.3 ppb (2) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A 21.0 μg/m3 (19) N/A 19.0
 
May 25, 2019, 4 p.m. 4.7 ppb (4) 2.3 ppb (2) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A 16.0 μg/m3 (15) N/A 16.0
 
May 25, 2019, 3 p.m. 4.6 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) N/A 18.0 μg/m3 (16) N/A 16.0
 
May 25, 2019, 2 p.m. 4.3 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A 18.0 μg/m3 (16) N/A 16.0
 
May 25, 2019, 1 p.m. 4.5 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) N/A 15.0 μg/m3 (14) N/A 16.0
 
May 25, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) N/A 13.0
 
May 25, 2019, 11 a.m. 4.2 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 20.0 ppb (15) N/A 13.0 μg/m3 (12) N/A 15.0
 
May 25, 2019, 10 a.m. 4.4 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) N/A 11.0 μg/m3 (10) N/A 14.0
 
May 25, 2019, 9 a.m. 5.0 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) N/A 9.0 μg/m3 (8) N/A 15.0
 
May 25, 2019, 8 a.m. 4.9 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) N/A 8.0 μg/m3 (7) N/A 15.0
 
May 25, 2019, 7 a.m. 5.5 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A 13.0 μg/m3 (12) N/A 15.0
 
May 25, 2019, 6 a.m. 4.6 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) N/A 14.0 μg/m3 (13) N/A 16.0
 
May 25, 2019, 5 a.m. 5.3 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) N/A 17.0 μg/m3 (15) N/A 18.0
 
May 25, 2019, 4 a.m. 5.5 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) N/A 13.0 μg/m3 (12) N/A 20.0
 
May 25, 2019, 3 a.m. 5.5 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) N/A 14.0 μg/m3 (13) N/A 23.0
 
May 25, 2019, 2 a.m. 4.7 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) N/A 15.0 μg/m3 (14) N/A 25.0
 
May 25, 2019, 1 a.m. 5.0 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A 14.0 μg/m3 (13) N/A 29.0
 
May 25, 2019, midnight 4.0 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A 13.0 μg/m3 (12) N/A 30.0
 
May 24, 2019, 11 p.m. 3.7 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A 12.0 μg/m3 (11) N/A 30.0
 
May 24, 2019, 10 p.m. 3.8 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) N/A 18.0 μg/m3 (16) N/A 29.0
 
May 24, 2019, 9 p.m. 3.9 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A 18.0 μg/m3 (16) N/A 28.0
 
May 24, 2019, 8 p.m. 3.8 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A 19.0 μg/m3 (17) N/A 26.0
 
May 24, 2019, 7 p.m. 4.0 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A 16.0 μg/m3 (15) N/A 24.0
 
May 24, 2019, 6 p.m. 4.3 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A 25.0 μg/m3 (23) N/A 24.0
 
May 24, 2019, 5 p.m. 5.0 ppb (5) 2.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) N/A 16.0 μg/m3 (15) N/A 21.0
 
May 24, 2019, 4 p.m. 5.6 ppb (5) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) N/A 22.0 μg/m3 (20) N/A 20.0
 
May 24, 2019, 3 p.m. 5.6 ppb (5) 2.8 ppb (3) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) N/A 19.0 μg/m3 (17) N/A 17.0
 
May 24, 2019, 2 p.m. 5.5 ppb (5) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) N/A 23.0 μg/m3 (21) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 1 p.m. 6.0 ppb (6) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) N/A 19.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
May 24, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 17.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
May 24, 2019, 11 a.m. 4.7 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 16.0 ppb (12) N/A 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 10 a.m. 4.5 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 16.0 ppb (12) N/A 6.0 μg/m3 (5) 10.0 μg/m3 (42) 42.0
 
May 24, 2019, 9 a.m. 4.0 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 17.0 ppb (13) N/A 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 8 a.m. 5.1 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) N/A 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 7 a.m. 6.6 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (13) N/A 5.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 24, 2019, 6 a.m. 5.4 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
May 24, 2019, 5 a.m. 4.8 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 4 a.m. 4.9 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 9.0 μg/m3 (38) 38.0
 
May 24, 2019, 3 a.m. 5.0 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 20.0
 
May 24, 2019, 2 a.m. 4.6 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
May 24, 2019, 1 a.m. 4.3 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) N/A 28.0 μg/m3 (25) 9.0 μg/m3 (38) 38.0
 
May 24, 2019, midnight 3.8 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 26.0
 
May 23, 2019, 11 p.m. 3.7 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A 3.0 μg/m3 (3) 6.0 μg/m3 (25) 26.0
 
May 23, 2019, 10 p.m. 3.7 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 25.0
 
May 23, 2019, 9 p.m. 4.3 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A 13.0 μg/m3 (12) 6.0 μg/m3 (25) 25.0
 
May 23, 2019, 8 p.m. 7.0 ppb (6) 3.6 ppb (3) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
May 23, 2019, 7 p.m. 5.0 ppb (5) 2.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A 13.0 μg/m3 (12) 6.0 μg/m3 (25) 26.0
 
May 23, 2019, 6 p.m. 4.0 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
May 23, 2019, 5 p.m. 4.5 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) N/A 19.0 μg/m3 (17) 6.0 μg/m3 (25) 25.0
 
May 23, 2019, 4 p.m. 5.2 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 20.0 μg/m3 (18) 8.0 μg/m3 (33) 33.0
 
May 23, 2019, 3 p.m. 7.1 ppb (7) 3.8 ppb (4) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) N/A 16.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
May 23, 2019, 2 p.m. 6.8 ppb (6) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A 17.0 ppb (13) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
May 23, 2019, 1 p.m. 5.0 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) N/A 7.0 μg/m3 (6) 8.0 μg/m3 (33) 33.0
 
May 23, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 23, 2019, 11 a.m. 3.1 ppb (3) 1.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 18.0
 
May 23, 2019, 10 a.m. 3.0 ppb (3) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 23.0 ppb (18) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 18.0
 
May 23, 2019, 9 a.m. 2.6 ppb (2) 1.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 18.0
 
May 23, 2019, 8 a.m. 2.9 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) N/A 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 23, 2019, 7 a.m. 4.8 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) N/A 5.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 23, 2019, 6 a.m. 4.6 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
May 23, 2019, 5 a.m. 5.8 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 23, 2019, 4 a.m. 7.5 ppb (7) 2.2 ppb (2) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 23, 2019, 3 a.m. 5.0 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 19.0
 
May 23, 2019, 2 a.m. 4.3 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
May 23, 2019, 1 a.m. 4.3 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
May 23, 2019, midnight 4.1 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 22, 2019, 11 p.m. 3.9 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 10 p.m. 5.0 ppb (5) 2.7 ppb (3) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 22.0
 
May 22, 2019, 9 p.m. 3.7 ppb (3) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 25.0
 
May 22, 2019, 8 p.m. 3.8 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 7 p.m. 4.2 ppb (4) 2.3 ppb (2) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 22.0
 
May 22, 2019, 6 p.m. 4.4 ppb (4) 2.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 20.0
 
May 22, 2019, 5 p.m. 5.4 ppb (5) 3.1 ppb (3) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 21.0
 
May 22, 2019, 4 p.m. 5.0 ppb (5) 2.8 ppb (3) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 22.0
 
May 22, 2019, 3 p.m. 7.4 ppb (7) 3.3 ppb (3) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
May 22, 2019, 2 p.m. 16.2 ppb (15) 6.4 ppb (6) N/A 10.0 ppb (9) N/A N/A 15.0 ppb (12) N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 17.0
 
May 22, 2019, 1 p.m. 16.2 ppb (15) 4.3 ppb (4) N/A 12.0 ppb (11) N/A N/A 9.0 ppb (7) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 11 a.m. 7.4 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (13) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
May 22, 2019, 10 a.m. 4.1 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 19.0
 
May 22, 2019, 9 a.m. 3.2 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 23.0
 
May 22, 2019, 8 a.m. 4.2 ppb (4) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
May 22, 2019, 7 a.m. 3.6 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 20.0
 
May 22, 2019, 6 a.m. 3.6 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 5 a.m. 3.4 ppb (3) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 22, 2019, 4 a.m. 3.7 ppb (3) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) N/A 1.0 μg/m3 (1) 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 3 a.m. 4.0 ppb (4) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 24.0
 
May 22, 2019, 2 a.m. 6.3 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
May 22, 2019, 1 a.m. 4.4 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 26.0
 
May 22, 2019, midnight 3.5 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A 7.0 μg/m3 (6) 1.0 μg/m3 (4) 28.0
 
May 21, 2019, 11 p.m. 8.5 ppb (8) 4.1 ppb (4) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 28.0
 
May 21, 2019, 10 p.m. 7.0 ppb (6) 3.8 ppb (4) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
May 21, 2019, 9 p.m. 3.4 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 30.0
 
May 21, 2019, 8 p.m. 3.2 ppb (3) 1.9 ppb (2) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 29.0
 
May 21, 2019, 7 p.m. 3.2 ppb (3) 1.9 ppb (2) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A 6.0 μg/m3 (5) 6.0 μg/m3 (25) 28.0
 
May 21, 2019, 6 p.m. 3.2 ppb (3) 1.9 ppb (2) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 28.0
 
May 21, 2019, 5 p.m. 3.2 ppb (3) 1.7 ppb (2) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 28.0
 
May 21, 2019, 4 p.m. 4.4 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
May 21, 2019, 3 p.m. 5.3 ppb (5) 2.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 25.0
 
May 21, 2019, 2 p.m. 7.6 ppb (7) 3.3 ppb (3) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
May 21, 2019, 1 p.m. 7.7 ppb (7) 3.2 ppb (3) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) N/A 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
May 21, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
May 21, 2019, 11 a.m. 5.5 ppb (5) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
May 21, 2019, 10 a.m. 4.6 ppb (4) 2.4 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
May 21, 2019, 9 a.m. 3.9 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
May 21, 2019, 8 a.m. 3.1 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) N/A 8.0 μg/m3 (7) 16.0 μg/m3 (59) 59.0
 
May 21, 2019, 7 a.m. 3.0 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
May 21, 2019, 6 a.m. 3.0 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
May 21, 2019, 5 a.m. 3.3 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 28.0
 
May 21, 2019, 4 a.m. 3.1 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 30.0
 
May 21, 2019, 3 a.m. 3.1 ppb (3) 1.7 ppb (2) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 31.0
 
May 21, 2019, 2 a.m. 3.1 ppb (3) 1.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) 3.0 μg/m3 (12) 31.0
 
May 21, 2019, 1 a.m. 6.0 ppb (6) 2.8 ppb (3) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 28.0
 
May 21, 2019, midnight 5.0 ppb (5) 2.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) 5.0 μg/m3 (21) 31.0
 
May 20, 2019, 11 p.m. 3.8 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 34.0
 
May 20, 2019, 10 p.m. 3.3 ppb (3) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 36.0
 
May 20, 2019, 9 p.m. 3.5 ppb (3) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 37.0
 
May 20, 2019, 8 p.m. 4.0 ppb (4) 2.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 34.0
 
May 20, 2019, 7 p.m. 4.2 ppb (4) 2.3 ppb (2) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 31.0
 
May 20, 2019, 6 p.m. 3.9 ppb (4) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 27.0
 
May 20, 2019, 5 p.m. 5.0 ppb (5) 2.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
May 20, 2019, 4 p.m. 6.8 ppb (6) 3.4 ppb (3) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
May 20, 2019, 3 p.m. 8.9 ppb (8) 5.0 ppb (5) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) N/A 20.0 μg/m3 (18) 3.0 μg/m3 (12) 18.0
 
May 20, 2019, 2 p.m. 18.0 ppb (17) 11.7 ppb (11) N/A 6.0 ppb (6) N/A N/A 5.0 ppb (4) N/A 18.0 μg/m3 (16) 7.0 μg/m3 (29) 29.0
 
May 20, 2019, 1 p.m. 21.4 ppb (20) 12.6 ppb (12) N/A 9.0 ppb (8) N/A N/A 2.0 ppb (2) N/A 14.0 μg/m3 (13) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, 11 a.m. 15.0 ppb (14) 6.2 ppb (6) N/A 9.0 ppb (8) N/A N/A 0.0 ppb (0) N/A 15.0 μg/m3 (14) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, 10 a.m. 14.4 ppb (13) 4.6 ppb (4) N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
May 20, 2019, 9 a.m. 13.1 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A N/A 3.0 ppb (2) N/A 4.0 μg/m3 (4) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, 8 a.m. 11.9 ppb (11) 4.3 ppb (4) N/A 8.0 ppb (7) N/A N/A 7.0 ppb (5) N/A 7.0 μg/m3 (6) 11.0 μg/m3 (46) 46.0
 
May 20, 2019, 7 a.m. 13.8 ppb (13) 3.4 ppb (3) N/A 10.0 ppb (9) N/A N/A 5.0 ppb (4) N/A 12.0 μg/m3 (11) 11.0 μg/m3 (46) 46.0
 
May 20, 2019, 6 a.m. 15.1 ppb (14) 3.6 ppb (3) N/A 12.0 ppb (11) N/A N/A 7.0 ppb (5) N/A 14.0 μg/m3 (13) 12.0 μg/m3 (50) 50.0
 
May 20, 2019, 5 a.m. 17.3 ppb (16) 3.6 ppb (3) N/A 14.0 ppb (13) N/A N/A 8.0 ppb (6) N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
May 20, 2019, 4 a.m. 14.1 ppb (13) 2.7 ppb (3) N/A 11.0 ppb (10) N/A N/A 10.0 ppb (8) N/A 6.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 20, 2019, 3 a.m. 7.7 ppb (7) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
May 20, 2019, 2 a.m. 4.8 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 26.0
 
May 20, 2019, 1 a.m. 4.1 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 28.0
 
May 20, 2019, midnight 4.8 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) N/A 1.0 μg/m3 (1) 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 11 p.m. 4.3 ppb (4) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 30.0
 
May 19, 2019, 10 p.m. 4.5 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (31) N/A 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
May 19, 2019, 9 p.m. 8.7 ppb (8) 4.4 ppb (4) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 8.0 μg/m3 (33) 33.0
 
May 19, 2019, 8 p.m. 8.4 ppb (8) 4.1 ppb (4) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 35.0
 
May 19, 2019, 7 p.m. 4.0 ppb (4) 2.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 35.0
 
May 19, 2019, 6 p.m. 6.1 ppb (6) 2.7 ppb (3) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (30) N/A 4.0 μg/m3 (4) 6.0 μg/m3 (25) 30.0
 
May 19, 2019, 5 p.m. 6.6 ppb (6) 2.5 ppb (2) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (20) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 4 p.m. 6.1 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 3 p.m. 5.5 ppb (5) 2.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) N/A 10.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
May 19, 2019, 2 p.m. 5.5 ppb (5) 2.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 1 p.m. 6.0 ppb (6) 2.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) N/A 5.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 19, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 8.0 μg/m3 (33) 33.0
 
May 19, 2019, 11 a.m. 4.9 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 18.0
 
May 19, 2019, 10 a.m. 4.9 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (8) 19.0
 
May 19, 2019, 9 a.m. 4.8 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 20.0
 
May 19, 2019, 8 a.m. 5.6 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) N/A 16.0
 
May 19, 2019, 7 a.m. 6.0 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 6 a.m. 5.6 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 5 a.m. 4.5 ppb (4) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) N/A 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 4 a.m. 6.3 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 18.0
 
May 19, 2019, 3 a.m. 5.8 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 18.0
 
May 19, 2019, 2 a.m. 7.0 ppb (6) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) N/A 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 1 a.m. 5.9 ppb (5) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) N/A 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
May 19, 2019, midnight 5.2 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
May 18, 2019, 11 p.m. 5.1 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (22) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 22.0
 
May 18, 2019, 10 p.m. 5.8 ppb (5) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) N/A 16.0 μg/m3 (15) 5.0 μg/m3 (21) 22.0