AQSQID: 060070008

Site Name: Chico - East

Location: Chico, CA

Reporting: True, Located: True

Current AQI: 22.0

Chico CA, US: 39.76161, -121.84048

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 18, 2019, 4 a.m. 6.3 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) 0.22 ppb (2) 14.0 μg/m3 (13) 1.0 μg/m3 (4) 22.0
 
Jan. 18, 2019, 3 a.m. 6.6 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) 0.22 ppb (2) 11.0 μg/m3 (10) 1.0 μg/m3 (4) 22.0
 
Jan. 18, 2019, 2 a.m. 11.3 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.28 ppb (3) 16.0 μg/m3 (15) 2.0 μg/m3 (8) 21.0
 
Jan. 18, 2019, 1 a.m. 12.2 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.29 ppb (3) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 20.0
 
Jan. 18, 2019, midnight 5.4 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.18 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 28.0
 
Jan. 17, 2019, 11 p.m. 5.4 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.17 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 28.0
 
Jan. 17, 2019, 10 p.m. 6.2 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.18 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 28.0
 
Jan. 17, 2019, 9 p.m. 6.0 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 12.0 μg/m3 (11) 1.0 μg/m3 (4) 27.0
 
Jan. 17, 2019, 8 p.m. 6.9 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.17 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
Jan. 17, 2019, 7 p.m. 5.2 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 28.0
 
Jan. 17, 2019, 6 p.m. 7.3 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.17 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 25.0
 
Jan. 17, 2019, 5 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.17 ppb (2) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 26.0
 
Jan. 17, 2019, 4 p.m. 5.9 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 27.0
 
Jan. 17, 2019, 3 p.m. 5.2 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.17 ppb (2) 18.0 μg/m3 (16) 4.0 μg/m3 (17) 25.0
 
Jan. 17, 2019, 2 p.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.15 ppb (2) 18.0 μg/m3 (16) 5.0 μg/m3 (21) 25.0
 
Jan. 17, 2019, 1 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.12 ppb (1) 25.0 μg/m3 (23) 4.0 μg/m3 (17) 26.0
 
Jan. 17, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (17) 3.0 μg/m3 (12) 17.0
 
Jan. 17, 2019, 11 a.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.13 ppb (1) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 25.0
 
Jan. 17, 2019, 10 a.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.14 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 25.0
 
Jan. 17, 2019, 9 a.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.14 ppb (2) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 25.0
 
Jan. 17, 2019, 8 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.14 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 24.0
 
Jan. 17, 2019, 7 a.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.13 ppb (1) 7.0 μg/m3 (6) -1.0 μg/m3 (0) 25.0
 
Jan. 17, 2019, 6 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.14 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 27.0
 
Jan. 17, 2019, 5 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (12) 28.0
 
Jan. 17, 2019, 4 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 28.0
 
Jan. 17, 2019, 3 a.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 28.0
 
Jan. 17, 2019, 2 a.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 28.0
 
Jan. 17, 2019, 1 a.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.14 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 28.0
 
Jan. 17, 2019, midnight 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.14 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 28.0
 
Jan. 16, 2019, 11 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.16 ppb (2) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 26.0
 
Jan. 16, 2019, 10 p.m. 4.4 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.17 ppb (2) 9.0 μg/m3 (8) -2.0 μg/m3 (0) 25.0
 
Jan. 16, 2019, 9 p.m. 3.1 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.15 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 25.0
 
Jan. 16, 2019, 8 p.m. 2.9 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.15 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 26.0
 
Jan. 16, 2019, 7 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.16 ppb (2) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 25.0
 
Jan. 16, 2019, 6 p.m. 4.2 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.17 ppb (2) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 24.0
 
Jan. 16, 2019, 5 p.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.16 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 24.0
 
Jan. 16, 2019, 4 p.m. 5.4 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.18 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 23.0
 
Jan. 16, 2019, 3 p.m. 5.2 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) 0.17 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 22.0
 
Jan. 16, 2019, 2 p.m. 4.4 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) 0.16 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 22.0
 
Jan. 16, 2019, 1 p.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.14 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 23.0
 
Jan. 16, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -1.0 μg/m3 (0) 5.0
 
Jan. 16, 2019, 11 a.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.15 ppb (2) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 24.0
 
Jan. 16, 2019, 10 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.15 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 24.0
 
Jan. 16, 2019, 9 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.17 ppb (2) 7.0 μg/m3 (6) 1.0 μg/m3 (4) 22.0
 
Jan. 16, 2019, 8 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) 0.18 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 21.0
 
Jan. 16, 2019, 7 a.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.17 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 23.0
 
Jan. 16, 2019, 6 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.16 ppb (2) 7.0 μg/m3 (6) -2.0 μg/m3 (0) 27.0
 
Jan. 16, 2019, 5 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.19 ppb (2) 9.0 μg/m3 (8) -2.0 μg/m3 (0) 26.0
 
Jan. 16, 2019, 4 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 5.0 μg/m3 (5) N/A 27.0
 
Jan. 16, 2019, 3 a.m. 3.6 ppb (3) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 2.0 μg/m3 (2) N/A 27.0
 
Jan. 16, 2019, 2 a.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.17 ppb (2) 3.0 μg/m3 (3) -2.0 μg/m3 (0) 28.0
 
Jan. 16, 2019, 1 a.m. 4.0 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.18 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 26.0
 
Jan. 16, 2019, midnight 5.2 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.18 ppb (2) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 26.0
 
Jan. 15, 2019, 11 p.m. 6.2 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.19 ppb (2) 4.0 μg/m3 (4) -2.0 μg/m3 (0) 25.0
 
Jan. 15, 2019, 10 p.m. 5.5 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.19 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 25.0
 
Jan. 15, 2019, 9 p.m. 4.9 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.16 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 24.0
 
Jan. 15, 2019, 8 p.m. 4.4 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.16 ppb (2) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 25.0
 
Jan. 15, 2019, 7 p.m. 4.0 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.15 ppb (2) 2.0 μg/m3 (2) -2.0 μg/m3 (0) 25.0
 
Jan. 15, 2019, 6 p.m. 5.2 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 23.0
 
Jan. 15, 2019, 5 p.m. 6.5 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.16 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2019, 4 p.m. 20.8 ppb (19) 4.7 ppb (4) N/A 16.0 ppb (15) N/A N/A 14.0 ppb (11) 0.37 ppb (4) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2019, 3 p.m. 16.7 ppb (15) 3.3 ppb (3) N/A 14.0 ppb (13) N/A N/A 16.0 ppb (12) 0.3 ppb (3) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
Jan. 15, 2019, 2 p.m. 14.5 ppb (13) 2.2 ppb (2) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.22 ppb (2) 10.0 μg/m3 (9) 0.0 μg/m3 (0) 14.0
 
Jan. 15, 2019, 1 p.m. 6.5 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.15 ppb (2) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 18.0
 
Jan. 15, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 1.0 μg/m3 (4) 11.0
 
Jan. 15, 2019, 11 a.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.12 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 25.0
 
Jan. 15, 2019, 10 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.11 ppb (1) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 25.0
 
Jan. 15, 2019, 9 a.m. 7.7 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) 0.29 ppb (3) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
Jan. 15, 2019, 8 a.m. 12.8 ppb (12) 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A 5.0 ppb (4) 0.43 ppb (5) 26.0 μg/m3 (24) 19.0 μg/m3 (65) 65.0
 
Jan. 15, 2019, 7 a.m. 10.3 ppb (10) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 10.0 ppb (8) 0.29 ppb (3) 19.0 μg/m3 (17) 16.0 μg/m3 (59) 59.0
 
Jan. 15, 2019, 6 a.m. 9.6 ppb (9) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) 0.33 ppb (4) 28.0 μg/m3 (25) 29.0 μg/m3 (86) 86.0
 
Jan. 15, 2019, 5 a.m. 15.2 ppb (14) 1.8 ppb (2) N/A 13.0 ppb (12) N/A N/A 8.0 ppb (6) 0.41 ppb (5) 27.0 μg/m3 (25) 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 4 a.m. 21.5 ppb (20) 4.7 ppb (4) N/A 17.0 ppb (16) N/A N/A 4.0 ppb (3) 0.53 ppb (6) 33.0 μg/m3 (30) 28.0 μg/m3 (84) 84.0
 
Jan. 15, 2019, 3 a.m. 34.3 ppb (32) 12.1 ppb (11) N/A 22.0 ppb (20) N/A N/A 2.0 ppb (2) 0.64 ppb (7) 37.0 μg/m3 (34) 28.0 μg/m3 (84) 84.0
 
Jan. 15, 2019, 2 a.m. 35.0 ppb (32) 12.3 ppb (11) N/A 23.0 ppb (21) N/A N/A 4.0 ppb (3) 0.65 ppb (7) 28.0 μg/m3 (25) 18.0 μg/m3 (63) 63.0
 
Jan. 15, 2019, 1 a.m. 16.8 ppb (16) 1.8 ppb (2) N/A 15.0 ppb (14) N/A N/A 12.0 ppb (9) 0.36 ppb (4) 21.0 μg/m3 (19) 12.0 μg/m3 (50) 50.0
 
Jan. 15, 2019, midnight 16.4 ppb (15) 3.2 ppb (3) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) 0.36 ppb (4) 33.0 μg/m3 (30) 21.0 μg/m3 (69) 69.0
 
Jan. 14, 2019, 11 p.m. 17.7 ppb (16) 3.8 ppb (4) N/A 14.0 ppb (13) N/A N/A 16.0 ppb (12) 0.31 ppb (3) 28.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 10 p.m. 7.5 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.2 ppb (2) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 18.0
 
Jan. 14, 2019, 9 p.m. 7.2 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.23 ppb (3) 14.0 μg/m3 (13) 15.0 μg/m3 (56) 56.0
 
Jan. 14, 2019, 8 p.m. 7.7 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.19 ppb (2) 14.0 μg/m3 (13) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 7 p.m. 7.6 ppb (7) 2.7 ppb (3) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) 0.19 ppb (2) 19.0 μg/m3 (17) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 6 p.m. 7.4 ppb (7) 3.3 ppb (3) N/A 4.0 ppb (4) N/A N/A 17.0 ppb (13) 0.19 ppb (2) 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 5 p.m. 10.8 ppb (10) 4.7 ppb (4) N/A 6.0 ppb (6) N/A N/A 10.0 ppb (8) 0.21 ppb (2) 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 4 p.m. 15.4 ppb (14) 6.2 ppb (6) N/A 9.0 ppb (8) N/A N/A 5.0 ppb (4) 0.28 ppb (3) 22.0 μg/m3 (20) 12.0 μg/m3 (50) 50.0
 
Jan. 14, 2019, 3 p.m. 19.5 ppb (18) 8.7 ppb (8) N/A 11.0 ppb (10) N/A N/A 3.0 ppb (2) 0.39 ppb (4) 54.0 μg/m3 (49) 19.0 μg/m3 (65) 65.0
 
Jan. 14, 2019, 2 p.m. 16.0 ppb (15) 5.1 ppb (5) N/A 11.0 ppb (10) N/A N/A 3.0 ppb (2) 0.26 ppb (3) 17.0 μg/m3 (15) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 1 p.m. 14.2 ppb (13) 3.1 ppb (3) N/A 11.0 ppb (10) N/A N/A 3.0 ppb (2) 0.2 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
Jan. 14, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) N/A 14.0
 
Jan. 14, 2019, 11 a.m. 14.7 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (11) N/A N/A 3.0 ppb (2) 0.29 ppb (3) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 10 a.m. 16.3 ppb (15) 4.8 ppb (4) N/A 12.0 ppb (11) N/A N/A 2.0 ppb (2) 0.32 ppb (4) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 9 a.m. 12.0 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A 3.0 ppb (2) 0.3 ppb (3) 20.0 μg/m3 (18) 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 8 a.m. 10.9 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A N/A 5.0 ppb (4) 0.29 ppb (3) 20.0 μg/m3 (18) 8.0 μg/m3 (33) 33.0
 
Jan. 14, 2019, 7 a.m. 12.9 ppb (12) 1.9 ppb (2) N/A 11.0 ppb (10) N/A N/A 6.0 ppb (5) 0.41 ppb (5) 21.0 μg/m3 (19) 7.0 μg/m3 (29) 29.0
 
Jan. 14, 2019, 6 a.m. 10.5 ppb (10) 2.3 ppb (2) N/A 8.0 ppb (7) N/A N/A 11.0 ppb (8) 0.35 ppb (4) 13.0 μg/m3 (12) 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 5 a.m. 11.1 ppb (10) 2.6 ppb (2) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) 0.3 ppb (3) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 4 a.m. 27.4 ppb (25) 8.9 ppb (8) N/A 18.0 ppb (17) N/A N/A 4.0 ppb (3) 0.68 ppb (8) 44.0 μg/m3 (40) 26.0 μg/m3 (80) 80.0
 
Jan. 14, 2019, 3 a.m. 27.5 ppb (25) 7.7 ppb (7) N/A 20.0 ppb (19) N/A N/A 6.0 ppb (5) 0.74 ppb (8) 45.0 μg/m3 (41) 28.0 μg/m3 (84) 84.0
 
Jan. 14, 2019, 2 a.m. 44.6 ppb (41) 19.1 ppb (18) N/A 26.0 ppb (24) N/A N/A 3.0 ppb (2) 0.89 ppb (10) 57.0 μg/m3 (51) 31.0 μg/m3 (90) 90.0
 
Jan. 14, 2019, 1 a.m. 38.5 ppb (36) 12.1 ppb (11) N/A 27.0 ppb (25) N/A N/A 7.0 ppb (5) 0.64 ppb (7) 36.0 μg/m3 (33) 18.0 μg/m3 (63) 63.0
 
Jan. 14, 2019, midnight 5.9 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.24 ppb (3) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 24.0
 
Jan. 13, 2019, 11 p.m. 3.2 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.16 ppb (2) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 27.0
 
Jan. 13, 2019, 10 p.m. 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.15 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 9 p.m. 3.2 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (23) 0.16 ppb (2) 8.0 μg/m3 (7) 11.0 μg/m3 (46) 46.0
 
Jan. 13, 2019, 8 p.m. 3.5 ppb (3) 1.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) 0.16 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 7 p.m. 3.1 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.16 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 20.0
 
Jan. 13, 2019, 6 p.m. 5.4 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) 0.18 ppb (2) 13.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 5 p.m. 15.6 ppb (14) 7.9 ppb (7) N/A 8.0 ppb (7) N/A N/A 11.0 ppb (8) 0.3 ppb (3) 17.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
Jan. 13, 2019, 4 p.m. 20.4 ppb (19) 11.0 ppb (10) N/A 9.0 ppb (8) N/A N/A 5.0 ppb (4) 0.3 ppb (3) 21.0 μg/m3 (19) 12.0 μg/m3 (50) 50.0
 
Jan. 13, 2019, 3 p.m. 38.4 ppb (36) 27.5 ppb (25) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) 0.44 ppb (5) 27.0 μg/m3 (25) 18.0 μg/m3 (63) 63.0
 
Jan. 13, 2019, 2 p.m. 34.2 ppb (32) 22.2 ppb (21) N/A 12.0 ppb (11) N/A N/A 1.0 ppb (1) 0.5 ppb (6) 31.0 μg/m3 (28) 23.0 μg/m3 (73) 73.0
 
Jan. 13, 2019, 1 p.m. 20.7 ppb (19) 10.5 ppb (10) N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) 0.36 ppb (4) 23.0 μg/m3 (21) 18.0 μg/m3 (63) 63.0
 
Jan. 13, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 18.0 μg/m3 (16) 10.0 μg/m3 (42) 42.0
 
Jan. 13, 2019, 11 a.m. 8.7 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 6.0 ppb (5) 0.33 ppb (4) 20.0 μg/m3 (18) 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, 10 a.m. 5.2 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 12.0 ppb (9) 0.27 ppb (3) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 9 a.m. 6.1 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) 0.25 ppb (3) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 8 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.18 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 7 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) 0.18 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 6 a.m. 5.6 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.21 ppb (2) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 5 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 22.0 ppb (17) 0.17 ppb (2) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
Jan. 13, 2019, 4 a.m. 14.1 ppb (13) 2.7 ppb (3) N/A 11.0 ppb (10) N/A N/A 15.0 ppb (12) 0.3 ppb (3) 24.0 μg/m3 (22) 15.0 μg/m3 (56) 56.0
 
Jan. 13, 2019, 3 a.m. 27.9 ppb (26) 7.6 ppb (7) N/A 20.0 ppb (19) N/A N/A 7.0 ppb (5) 0.62 ppb (7) 48.0 μg/m3 (44) 27.0 μg/m3 (82) 82.0
 
Jan. 13, 2019, 2 a.m. 31.0 ppb (29) 7.9 ppb (7) N/A 23.0 ppb (21) N/A N/A 5.0 ppb (4) 0.62 ppb (7) 45.0 μg/m3 (41) 21.0 μg/m3 (69) 69.0
 
Jan. 13, 2019, 1 a.m. 26.6 ppb (25) 6.0 ppb (6) N/A 21.0 ppb (19) N/A N/A 10.0 ppb (8) 0.52 ppb (6) 30.0 μg/m3 (27) 8.0 μg/m3 (33) 33.0
 
Jan. 13, 2019, midnight 6.6 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (20) 0.21 ppb (2) 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
Jan. 12, 2019, 11 p.m. 5.9 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.2 ppb (2) 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
Jan. 12, 2019, 10 p.m. 5.2 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.19 ppb (2) 14.0 μg/m3 (13) 7.0 μg/m3 (29) 29.0
 
Jan. 12, 2019, 9 p.m. 6.0 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.2 ppb (2) 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
Jan. 12, 2019, 8 p.m. 7.6 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.22 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
Jan. 12, 2019, 7 p.m. 16.9 ppb (16) 7.2 ppb (7) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) 0.3 ppb (3) 15.0 μg/m3 (14) 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 6 p.m. 19.9 ppb (18) 8.9 ppb (8) N/A 11.0 ppb (10) N/A N/A 13.0 ppb (10) 0.32 ppb (4) 18.0 μg/m3 (16) 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 5 p.m. 30.0 ppb (28) 17.0 ppb (16) N/A 13.0 ppb (12) N/A N/A 8.0 ppb (6) 0.4 ppb (4) 21.0 μg/m3 (19) 11.0 μg/m3 (46) 46.0
 
Jan. 12, 2019, 4 p.m. 48.4 ppb (45) 37.2 ppb (34) N/A 11.0 ppb (10) N/A N/A 2.0 ppb (2) 0.52 ppb (6) 22.0 μg/m3 (20) 14.0 μg/m3 (54) 54.0
 
Jan. 12, 2019, 3 p.m. 44.9 ppb (42) 33.9 ppb (31) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) 0.53 ppb (6) 23.0 μg/m3 (21) 16.0 μg/m3 (59) 59.0
 
Jan. 12, 2019, 2 p.m. 39.3 ppb (36) 28.5 ppb (26) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) 0.49 ppb (5) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 36.0
 
Jan. 12, 2019, 1 p.m. 26.4 ppb (24) 17.5 ppb (16) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.39 ppb (4) 20.0 μg/m3 (18) 6.0 μg/m3 (25) 25.0
 
Jan. 12, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 11.0 μg/m3 (46) 46.0
 
Jan. 12, 2019, 11 a.m. 23.7 ppb (22) 15.1 ppb (14) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.56 ppb (6) 20.0 μg/m3 (18) 13.0 μg/m3 (52) 52.0
 
Jan. 12, 2019, 10 a.m. 22.1 ppb (20) 14.0 ppb (13) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.55 ppb (6) 25.0 μg/m3 (23) 15.0 μg/m3 (56) 56.0
 
Jan. 12, 2019, 9 a.m. 22.6 ppb (21) 14.3 ppb (13) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.6 ppb (7) 24.0 μg/m3 (22) 8.0 μg/m3 (33) 33.0
 
Jan. 12, 2019, 8 a.m. 18.3 ppb (17) 10.2 ppb (9) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.46 ppb (5) 22.0 μg/m3 (20) 9.0 μg/m3 (38) 38.0
 
Jan. 12, 2019, 7 a.m. 17.8 ppb (16) 9.5 ppb (9) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.6 ppb (7) 30.0 μg/m3 (27) 20.0 μg/m3 (67) 67.0
 
Jan. 12, 2019, 6 a.m. 18.1 ppb (17) 9.1 ppb (8) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.56 ppb (6) 24.0 μg/m3 (22) 17.0 μg/m3 (61) 61.0
 
Jan. 12, 2019, 5 a.m. 18.2 ppb (17) 6.8 ppb (6) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) 0.48 ppb (5) 29.0 μg/m3 (26) 23.0 μg/m3 (73) 73.0
 
Jan. 12, 2019, 4 a.m. 15.2 ppb (14) 4.2 ppb (4) N/A 11.0 ppb (10) N/A N/A 4.0 ppb (3) 0.44 ppb (5) 30.0 μg/m3 (27) 17.0 μg/m3 (61) 61.0
 
Jan. 12, 2019, 3 a.m. 11.4 ppb (11) 2.1 ppb (2) N/A 9.0 ppb (8) N/A N/A 5.0 ppb (4) 0.32 ppb (4) 18.0 μg/m3 (16) 10.0 μg/m3 (42) 42.0
 
Jan. 12, 2019, 2 a.m. 12.3 ppb (11) 1.8 ppb (2) N/A 11.0 ppb (10) N/A N/A 7.0 ppb (5) 0.37 ppb (4) 30.0 μg/m3 (27) 16.0 μg/m3 (59) 59.0
 
Jan. 12, 2019, 1 a.m. 10.6 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 9.0 ppb (7) 0.3 ppb (3) 18.0 μg/m3 (16) 11.0 μg/m3 (46) 46.0
 
Jan. 12, 2019, midnight 7.3 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (11) 0.25 ppb (3) 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
Jan. 11, 2019, 11 p.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 18.0 ppb (14) 0.2 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2019, 10 p.m. 4.1 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.19 ppb (2) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 15.0
 
Jan. 11, 2019, 9 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 21.0 ppb (16) 0.17 ppb (2) 12.0 μg/m3 (11) 1.0 μg/m3 (4) 16.0
 
Jan. 11, 2019, 8 p.m. 3.9 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) 0.18 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2019, 7 p.m. 4.3 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.18 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2019, 6 p.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 17.0 ppb (13) 0.18 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 13.0
 
Jan. 11, 2019, 5 p.m. 8.4 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A 10.0 ppb (8) 0.19 ppb (2) 12.0 μg/m3 (11) 1.0 μg/m3 (4) 11.0
 
Jan. 11, 2019, 4 p.m. 13.4 ppb (12) 4.2 ppb (4) N/A 9.0 ppb (8) N/A N/A 7.0 ppb (5) 0.26 ppb (3) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2019, 3 p.m. 15.4 ppb (14) 5.2 ppb (5) N/A 10.0 ppb (9) N/A N/A 5.0 ppb (4) 0.24 ppb (3) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 14.0
 
Jan. 11, 2019, 2 p.m. 8.1 ppb (8) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (6) 0.18 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 8.0
 
Jan. 11, 2019, 1 p.m. 6.0 ppb (6) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) 0.17 ppb (2) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 10.0
 
Jan. 11, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 1.0 μg/m3 (4) 5.0
 
Jan. 11, 2019, 11 a.m. 4.1 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 13.0 ppb (10) 0.18 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
Jan. 11, 2019, 10 a.m. 12.3 ppb (11) 4.4 ppb (4) N/A 8.0 ppb (7) N/A N/A 5.0 ppb (4) 0.31 ppb (3) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Jan. 11, 2019, 9 a.m. 42.3 ppb (39) 35.1 ppb (32) N/A 7.0 ppb (6) N/A N/A 1.0 ppb (1) 1.02 ppb (11) 52.0 μg/m3 (47) 39.0 μg/m3 (109) 109.0
 
Jan. 11, 2019, 8 a.m. 36.2 ppb (34) 28.1 ppb (26) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.69 ppb (8) 41.0 μg/m3 (37) 24.0 μg/m3 (76) 76.0
 
Jan. 11, 2019, 7 a.m. 32.5 ppb (30) 24.4 ppb (23) N/A 8.0 ppb (7) N/A N/A 1.0 ppb (1) 0.77 ppb (9) 41.0 μg/m3 (37) 28.0 μg/m3 (84) 84.0
 
Jan. 11, 2019, 6 a.m. 32.5 ppb (30) 23.2 ppb (21) N/A 9.0 ppb (8) N/A N/A 1.0 ppb (1) 0.72 ppb (8) 36.0 μg/m3 (33) 22.0 μg/m3 (71) 71.0
 
Jan. 11, 2019, 5 a.m. 22.2 ppb (21) 13.2 ppb (12) N/A 9.0 ppb (8) N/A N/A 2.0 ppb (2) 0.53 ppb (6) 27.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0