AQSQID: 060070008

Site Name: Chico - East

Location: Chico (E Ave), CA

Reporting: True, Located: True

Current AQI: 21.0

Chico (E Ave) CA, US: 39.76168, -121.84047

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 8, 2020, 10 a.m. 0.7 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 18.0 ppb (14) 0.15 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
April 8, 2020, 9 a.m. 0.4 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 18.0 ppb (14) 0.13 ppb (1) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
April 8, 2020, 8 a.m. 1.5 ppb (1) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (12) 0.14 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 12.0
 
April 8, 2020, 7 a.m. 2.5 ppb (2) -0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) 0.15 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 12.0
 
April 8, 2020, 6 a.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) 0.17 ppb (2) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 5 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 16.0 ppb (12) 0.18 ppb (2) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 17.0
 
April 8, 2020, 4 a.m. 1.5 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.17 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 25.0
 
April 8, 2020, 3 a.m. 3.3 ppb (3) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) 0.17 ppb (2) 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
April 8, 2020, 2 a.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.17 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
April 8, 2020, 1 a.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.16 ppb (2) 7.0 μg/m3 (6) -1.0 μg/m3 (0) 29.0
 
April 8, 2020, midnight 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.16 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 29.0
 
April 7, 2020, 11 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) 0.16 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 30.0
 
April 7, 2020, 10 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.16 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 31.0
 
April 7, 2020, 9 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (30) 0.17 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 30.0
 
April 7, 2020, 8 p.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.15 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 28.0
 
April 7, 2020, 7 p.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.16 ppb (2) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 28.0
 
April 7, 2020, 6 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.16 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
April 7, 2020, 5 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (22) 0.16 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 22.0
 
April 7, 2020, 4 p.m. 4.3 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) 0.17 ppb (2) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
April 7, 2020, 3 p.m. 5.8 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) 0.19 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 12.0
 
April 7, 2020, 2 p.m. 6.9 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 9.0 ppb (7) 0.17 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
April 7, 2020, 1 p.m. 6.9 ppb (6) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 10.0 ppb (8) 0.21 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
April 7, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 11 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 10.0 ppb (8) 0.17 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
April 7, 2020, 10 a.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 9.0 ppb (7) 0.18 ppb (2) 1.0 μg/m3 (1) 6.0 μg/m3 (25) 25.0
 
April 7, 2020, 9 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 12.0 ppb (9) 0.17 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 9.0
 
April 7, 2020, 8 a.m. 1.1 ppb (1) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 13.0 ppb (10) 0.17 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 12.0
 
April 7, 2020, 7 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (12) 0.18 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
April 7, 2020, 6 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 20.0 ppb (15) 0.21 ppb (2) 9.0 μg/m3 (8) 7.0 μg/m3 (29) 29.0
 
April 7, 2020, 5 a.m. 6.5 ppb (6) -0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 18.0 ppb (14) 0.27 ppb (3) 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
April 7, 2020, 4 a.m. 5.2 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.25 ppb (3) 10.0 μg/m3 (9) 9.0 μg/m3 (38) 38.0
 
April 7, 2020, 3 a.m. 3.3 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.19 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 23.0
 
April 7, 2020, 2 a.m. 1.9 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.17 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 28.0
 
April 7, 2020, 1 a.m. 1.1 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.16 ppb (2) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 28.0
 
April 7, 2020, midnight 0.5 ppb (0) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.15 ppb (2) -1.0 μg/m3 (0) 1.0 μg/m3 (4) 29.0
 
April 6, 2020, 11 p.m. 0.4 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 1.0 μg/m3 (1) -2.0 μg/m3 (0) 29.0
 
April 6, 2020, 10 p.m. 0.2 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 29.0
 
April 6, 2020, 9 p.m. 0.4 ppb (0) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.14 ppb (2) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 29.0
 
April 6, 2020, 8 p.m. 0.5 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 2.0 μg/m3 (2) 5.0 μg/m3 (21) 29.0
 
April 6, 2020, 7 p.m. 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.15 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 30.0
 
April 6, 2020, 6 p.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (12) 29.0
 
April 6, 2020, 5 p.m. 2.6 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.15 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 26.0
 
April 6, 2020, 4 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) 0.15 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
April 6, 2020, 3 p.m. 10.0 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) 0.23 ppb (3) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 2 p.m. 10.7 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 10.0 ppb (8) 0.3 ppb (3) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 1 p.m. 8.8 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 14.0 ppb (11) 0.23 ppb (3) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
April 6, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 8.0
 
April 6, 2020, 11 a.m. 3.9 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) 0.21 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 15.0
 
April 6, 2020, 10 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) 0.16 ppb (2) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 18.0
 
April 6, 2020, 9 a.m. 1.8 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.15 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 20.0
 
April 6, 2020, 8 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (17) 0.21 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 25.0
 
April 6, 2020, 7 a.m. 4.1 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.22 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
April 6, 2020, 6 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.24 ppb (3) 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
April 6, 2020, 5 a.m. 5.7 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.29 ppb (3) 8.0 μg/m3 (7) 12.0 μg/m3 (50) 50.0
 
April 6, 2020, 4 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.2 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 27.0
 
April 6, 2020, 3 a.m. 1.6 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.16 ppb (2) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 29.0
 
April 6, 2020, 2 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (27) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 27.0
 
April 6, 2020, 1 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.15 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 25.0
 
April 6, 2020, midnight 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.16 ppb (2) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 25.0
 
April 5, 2020, 11 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.16 ppb (2) 1.0 μg/m3 (1) 0.0 μg/m3 (0) 25.0
 
April 5, 2020, 10 p.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.15 ppb (2) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 25.0
 
April 5, 2020, 9 p.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) 0.15 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 26.0
 
April 5, 2020, 8 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.16 ppb (2) 0.0 μg/m3 (0) 2.0 μg/m3 (8) 25.0
 
April 5, 2020, 7 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.16 ppb (2) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 24.0
 
April 5, 2020, 6 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.16 ppb (2) 0.0 μg/m3 (0) 2.0 μg/m3 (8) 25.0
 
April 5, 2020, 5 p.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.16 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 20.0
 
April 5, 2020, 4 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) 0.15 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 18.0
 
April 5, 2020, 3 p.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) 0.15 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (12) 22.0
 
April 5, 2020, 2 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.15 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 23.0
 
April 5, 2020, 1 p.m. 0.9 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.14 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 23.0
 
April 5, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 4.0
 
April 5, 2020, 11 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.15 ppb (2) 1.0 μg/m3 (1) 4.0 μg/m3 (17) 23.0
 
April 5, 2020, 10 a.m. 0.7 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.15 ppb (2) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 22.0
 
April 5, 2020, 9 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.17 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 22.0
 
April 5, 2020, 8 a.m. 0.8 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) 0.17 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 20.0
 
April 5, 2020, 7 a.m. 1.2 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) 0.18 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 20.0
 
April 5, 2020, 6 a.m. 1.2 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.18 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 22.0
 
April 5, 2020, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.19 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 22.0
 
April 5, 2020, 4 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.19 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 23.0
 
April 5, 2020, 3 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) 0.16 ppb (2) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 21.0
 
April 5, 2020, 2 a.m. 1.1 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 24.0 ppb (18) 0.16 ppb (2) 8.0 μg/m3 (7) -1.0 μg/m3 (0) 18.0
 
April 5, 2020, 1 a.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 25.0 ppb (19) 0.17 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 19.0
 
April 5, 2020, midnight 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) 0.17 ppb (2) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 21.0
 
April 4, 2020, 11 p.m. 1.7 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) 0.17 ppb (2) -1.0 μg/m3 (0) 2.0 μg/m3 (8) 21.0
 
April 4, 2020, 10 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (22) 0.18 ppb (2) 3.0 μg/m3 (3) 7.0 μg/m3 (29) 29.0
 
April 4, 2020, 9 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (21) 0.19 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 8 p.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.19 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 7 p.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.19 ppb (2) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 6 p.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.19 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 5 p.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (20) 0.17 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 20.0
 
April 4, 2020, 4 p.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.16 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 20.0
 
April 4, 2020, 3 p.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.17 ppb (2) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 2 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) 0.18 ppb (2) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 1 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.18 ppb (2) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 17.0
 
April 4, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 3.0 μg/m3 (12) 12.0
 
April 4, 2020, 11 a.m. 4.6 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (18) 0.19 ppb (2) 13.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
April 4, 2020, 10 a.m. 6.0 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) 0.25 ppb (3) 12.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
April 4, 2020, 9 a.m. 6.3 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (18) 0.23 ppb (3) 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
April 4, 2020, 8 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.18 ppb (2) 9.0 μg/m3 (8) 1.0 μg/m3 (4) 24.0
 
April 4, 2020, 7 a.m. 1.1 ppb (1) -0.6 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.18 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 25.0
 
April 4, 2020, 6 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.17 ppb (2) 4.0 μg/m3 (4) 7.0 μg/m3 (29) 29.0
 
April 4, 2020, 5 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.2 ppb (2) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 4 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.18 ppb (2) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 25.0
 
April 4, 2020, 3 a.m. 6.2 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.24 ppb (3) 20.0 μg/m3 (18) 6.0 μg/m3 (25) 25.0
 
April 4, 2020, 2 a.m. 5.2 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) 0.23 ppb (3) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 28.0
 
April 4, 2020, 1 a.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.16 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 36.0
 
April 4, 2020, midnight 0.4 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.15 ppb (2) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 36.0
 
April 3, 2020, 11 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.15 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 36.0
 
April 3, 2020, 10 p.m. 0.5 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.16 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 35.0
 
April 3, 2020, 9 p.m. 0.4 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) 0.15 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 32.0
 
April 3, 2020, 8 p.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 28.0
 
April 3, 2020, 7 p.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) 0.17 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 26.0
 
April 3, 2020, 6 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.16 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
April 3, 2020, 5 p.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.15 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 23.0
 
April 3, 2020, 4 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) 0.14 ppb (2) 10.0 μg/m3 (9) 0.0 μg/m3 (0) 21.0
 
April 3, 2020, 3 p.m. 7.0 ppb (6) 1.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 21.0 ppb (16) 0.18 ppb (2) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 16.0
 
April 3, 2020, 2 p.m. 15.5 ppb (14) 3.3 ppb (3) N/A 12.0 ppb (11) N/A N/A 11.0 ppb (8) 0.21 ppb (2) 15.0 μg/m3 (14) 3.0 μg/m3 (12) 14.0
 
April 3, 2020, 1 p.m. 12.3 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 8.0 ppb (6) 0.31 ppb (3) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 11.0
 
April 3, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 2.0 μg/m3 (8) 8.0
 
April 3, 2020, 11 a.m. 7.0 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 14.0 ppb (11) 0.2 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 17.0
 
April 3, 2020, 10 a.m. 6.4 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 16.0 ppb (12) 0.19 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
April 3, 2020, 9 a.m. 4.4 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) 0.18 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
April 3, 2020, 8 a.m. 5.8 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) 0.18 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (12) 15.0
 
April 3, 2020, 7 a.m. 1.3 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (20) 0.17 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 20.0
 
April 3, 2020, 6 a.m. 2.2 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (18) 0.17 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 18.0
 
April 3, 2020, 5 a.m. 4.2 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.2 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 18.0
 
April 3, 2020, 4 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) 0.2 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 19.0
 
April 3, 2020, 3 a.m. 11.6 ppb (11) 0.7 ppb (1) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.3 ppb (3) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 17.0
 
April 3, 2020, 2 a.m. 3.8 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.22 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 27.0
 
April 3, 2020, 1 a.m. 0.3 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) 0.16 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 32.0
 
April 3, 2020, midnight 0.3 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 33.0
 
April 2, 2020, 11 p.m. 0.1 ppb (0) -0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (32) 0.16 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 32.0
 
April 2, 2020, 10 p.m. 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.16 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 30.0
 
April 2, 2020, 9 p.m. 0.3 ppb (0) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 28.0
 
April 2, 2020, 8 p.m. 0.1 ppb (0) -0.3 ppb (0) N/A 0.0 ppb (0) N/A N/A 35.0 ppb (27) 0.16 ppb (2) 12.0 μg/m3 (11) -1.0 μg/m3 (0) 27.0
 
April 2, 2020, 7 p.m. 0.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.16 ppb (2) 10.0 μg/m3 (9) 0.0 μg/m3 (0) 25.0
 
April 2, 2020, 6 p.m. 0.8 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) 0.16 ppb (2) 9.0 μg/m3 (8) -1.0 μg/m3 (0) 24.0
 
April 2, 2020, 5 p.m. 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.15 ppb (2) 14.0 μg/m3 (13) 2.0 μg/m3 (8) 22.0
 
April 2, 2020, 4 p.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) 0.14 ppb (2) N/A N/A 20.0
 
April 2, 2020, 3 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 18.0
 
April 2, 2020, 2 p.m. 5.5 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) 0.15 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 16.0
 
April 2, 2020, 1 p.m. 1.4 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) 0.12 ppb (1) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 19.0
 
April 2, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 4.0 μg/m3 (17) 17.0
 
April 2, 2020, 11 a.m. 1.1 ppb (1) -0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 25.0 ppb (19) 0.14 ppb (2) 1.0 μg/m3 (1) 5.0 μg/m3 (21) 21.0
 
April 2, 2020, 10 a.m. 0.8 ppb (1) -0.6 ppb (0) N/A 1.0 ppb (1) N/A N/A 26.0 ppb (20) 0.14 ppb (2) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 20.0
 
April 2, 2020, 9 a.m. 0.5 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (21) 0.14 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 21.0
 
April 2, 2020, 8 a.m. 0.5 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.15 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 22.0
 
April 2, 2020, 7 a.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.14 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 22.0
 
April 2, 2020, 6 a.m. 0.7 ppb (1) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 28.0 ppb (22) 0.16 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 22.0
 
April 2, 2020, 5 a.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 29.0 ppb (22) 0.16 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 22.0
 
April 2, 2020, 4 a.m. 0.8 ppb (1) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (25) 0.15 ppb (2) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 25.0
 
April 2, 2020, 3 a.m. 3.1 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.18 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 25.0
 
April 2, 2020, 2 a.m. 0.5 ppb (0) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.15 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 30.0
 
April 2, 2020, 1 a.m. 0.2 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) 0.14 ppb (2) 1.0 μg/m3 (1) 0.0 μg/m3 (0) 33.0
 
April 2, 2020, midnight 0.6 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) 0.14 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 33.0
 
April 1, 2020, 11 p.m. 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 42.0 ppb (32) 0.14 ppb (2) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 32.0
 
April 1, 2020, 10 p.m. 0.3 ppb (0) -0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) 0.14 ppb (2) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 32.0
 
April 1, 2020, 9 p.m. 0.0 ppb (0) -0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.14 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 31.0
 
April 1, 2020, 8 p.m. 0.3 ppb (0) -0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.14 ppb (2) 11.0 μg/m3 (10) 0.0 μg/m3 (0) 31.0
 
April 1, 2020, 7 p.m. 0.4 ppb (0) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.14 ppb (2) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 29.0
 
April 1, 2020, 6 p.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (28) 0.14 ppb (2) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 28.0
 
April 1, 2020, 5 p.m. 1.1 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (26) 0.13 ppb (1) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 26.0
 
April 1, 2020, 4 p.m. 1.3 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (24) 0.13 ppb (1) 21.0 μg/m3 (19) 3.0 μg/m3 (12) 24.0
 
April 1, 2020, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (23) 0.12 ppb (1) 16.0 μg/m3 (15) 3.0 μg/m3 (12) 23.0
 
April 1, 2020, 2 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.12 ppb (1) 17.0 μg/m3 (15) 1.0 μg/m3 (4) 25.0
 
April 1, 2020, 1 p.m. 0.8 ppb (1) -0.7 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (25) 0.11 ppb (1) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
April 1, 2020, noon N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 8.0
 
April 1, 2020, 11 a.m. 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A N/A 36.0 ppb (28) 0.11 ppb (1) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 28.0