ID: 2155

AQSQID: 060070008

Site Name: Chico - East

Added: April 21, 2020, 6:24 p.m.

Updated: Sept. 21, 2021, 5:05 p.m.

Location: Chico (E Ave), CA

Reporting: True, Located: True

Current AQI: 66.0

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
Sept. 21, 2021, 3 p.m. 25.6 ppb (25) 11.4 ppb (11) N/A 14.0 ppb (14) N/A N/A 10.0 ppb (10) 0.48 ppb (6) 84.0 μg/m3 (66) 8.0 μg/m3 (34) 66.0
 
Sept. 21, 2021, 2 p.m. 35.1 ppb (34) 19.7 ppb (19) N/A 15.0 ppb (15) N/A N/A 3.0 ppb (3) 0.39 ppb (5) 40.0 μg/m3 (38) 8.0 μg/m3 (34) 38.0
 
Sept. 21, 2021, 1 p.m. 26.8 ppb (26) 14.4 ppb (14) N/A 12.0 ppb (12) N/A N/A 5.0 ppb (5) 0.31 ppb (4) 21.0 μg/m3 (20) 1.0 μg/m3 (5) 26.0
 
Sept. 21, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (15) 0.0 μg/m3 (0) 15.0
 
Sept. 21, 2021, 11 a.m. 5.8 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 14.0 ppb (13) 0.21 ppb (3) 19.0 μg/m3 (18) 2.0 μg/m3 (9) 18.0
 
Sept. 21, 2021, 10 a.m. 5.9 ppb (6) 0.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (13) 0.21 ppb (3) 20.0 μg/m3 (19) 3.0 μg/m3 (13) 19.0
 
Sept. 21, 2021, 9 a.m. 5.1 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (15) 0.21 ppb (3) 13.0 μg/m3 (13) 3.0 μg/m3 (13) 15.0
 
Sept. 21, 2021, 8 a.m. 5.7 ppb (6) 0.5 ppb (1) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (16) 0.23 ppb (3) 16.0 μg/m3 (15) 3.0 μg/m3 (13) 16.0
 
Sept. 21, 2021, 7 a.m. 5.7 ppb (6) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (18) 0.21 ppb (3) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2021, 6 a.m. 5.0 ppb (5) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 24.0 ppb (23) 0.21 ppb (3) 11.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2021, 5 a.m. 8.3 ppb (8) 0.3 ppb (1) N/A 8.0 ppb (8) N/A N/A 25.0 ppb (24) 0.27 ppb (4) 19.0 μg/m3 (18) 7.0 μg/m3 (30) 30.0
 
Sept. 21, 2021, 4 a.m. 12.1 ppb (12) 0.9 ppb (1) N/A 11.0 ppb (11) N/A N/A 22.0 ppb (21) 0.3 ppb (4) 15.0 μg/m3 (14) 2.0 μg/m3 (9) 21.0
 
Sept. 21, 2021, 3 a.m. 4.7 ppb (5) 0.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (31) 0.25 ppb (3) 17.0 μg/m3 (16) 2.0 μg/m3 (9) 31.0
 
Sept. 21, 2021, 2 a.m. 2.2 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.2 ppb (3) 19.0 μg/m3 (18) 1.0 μg/m3 (5) 36.0
 
Sept. 21, 2021, 1 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.19 ppb (3) 20.0 μg/m3 (19) 0.0 μg/m3 (0) 37.0
 
Sept. 21, 2021, midnight 2.3 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.2 ppb (3) 36.0 μg/m3 (34) 1.0 μg/m3 (5) 38.0
 
Sept. 20, 2021, 11 p.m. 2.3 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.2 ppb (3) 26.0 μg/m3 (25) 1.0 μg/m3 (5) 37.0
 
Sept. 20, 2021, 10 p.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.2 ppb (3) 47.0 μg/m3 (44) 3.0 μg/m3 (13) 44.0
 
Sept. 20, 2021, 9 p.m. 2.4 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.2 ppb (3) 65.0 μg/m3 (56) 3.0 μg/m3 (13) 56.0
 
Sept. 20, 2021, 8 p.m. 2.0 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.17 ppb (3) 59.0 μg/m3 (53) 1.0 μg/m3 (5) 53.0
 
Sept. 20, 2021, 7 p.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.18 ppb (3) 49.0 μg/m3 (46) 0.0 μg/m3 (0) 46.0
 
Sept. 20, 2021, 6 p.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.19 ppb (3) 47.0 μg/m3 (44) 4.0 μg/m3 (17) 44.0
 
Sept. 20, 2021, 5 p.m. 2.7 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) 0.19 ppb (3) 34.0 μg/m3 (32) 4.0 μg/m3 (17) 32.0
 
Sept. 20, 2021, 4 p.m. 3.2 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) 0.19 ppb (3) 37.0 μg/m3 (35) 1.0 μg/m3 (5) 35.0
 
Sept. 20, 2021, 3 p.m. 7.8 ppb (8) 2.2 ppb (3) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (19) 0.23 ppb (3) 29.0 μg/m3 (27) 2.0 μg/m3 (9) 27.0
 
Sept. 20, 2021, 2 p.m. 12.1 ppb (12) 2.3 ppb (3) N/A 10.0 ppb (10) N/A N/A 11.0 ppb (11) 0.27 ppb (4) 18.0 μg/m3 (17) 3.0 μg/m3 (13) 17.0
 
Sept. 20, 2021, 1 p.m. 7.9 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (7) N/A N/A 14.0 ppb (13) 0.24 ppb (3) 8.0 μg/m3 (8) 1.0 μg/m3 (5) 13.0
 
Sept. 20, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (3) 0.0 μg/m3 (0) 3.0
 
Sept. 20, 2021, 11 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.18 ppb (3) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 25.0
 
Sept. 20, 2021, 10 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.18 ppb (3) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 25.0
 
Sept. 20, 2021, 9 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) 0.18 ppb (3) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 26.0
 
Sept. 20, 2021, 8 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (25) 0.19 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 25.0
 
Sept. 20, 2021, 7 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.19 ppb (3) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 25.0
 
Sept. 20, 2021, 6 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) 0.19 ppb (3) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 27.0
 
Sept. 20, 2021, 5 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) 0.18 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 28.0
 
Sept. 20, 2021, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) 0.18 ppb (3) 8.0 μg/m3 (8) 6.0 μg/m3 (25) 27.0
 
Sept. 20, 2021, 3 a.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.2 ppb (3) 13.0 μg/m3 (13) 6.0 μg/m3 (25) 30.0
 
Sept. 20, 2021, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.2 ppb (3) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 33.0
 
Sept. 20, 2021, 1 a.m. 1.6 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.18 ppb (3) 7.0 μg/m3 (7) 0.0 μg/m3 (0) 36.0
 
Sept. 20, 2021, midnight 1.6 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) 0.18 ppb (3) 9.0 μg/m3 (9) 0.0 μg/m3 (0) 38.0
 
Sept. 19, 2021, 11 p.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) 0.18 ppb (3) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 38.0
 
Sept. 19, 2021, 10 p.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.18 ppb (3) 9.0 μg/m3 (9) 1.0 μg/m3 (5) 37.0
 
Sept. 19, 2021, 9 p.m. 2.0 ppb (2) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.18 ppb (3) 9.0 μg/m3 (9) 1.0 μg/m3 (5) 37.0
 
Sept. 19, 2021, 8 p.m. 2.1 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.17 ppb (3) 1.0 μg/m3 (1) 1.0 μg/m3 (5) 36.0
 
Sept. 19, 2021, 7 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.18 ppb (3) 3.0 μg/m3 (3) 2.0 μg/m3 (9) 34.0
 
Sept. 19, 2021, 6 p.m. 3.4 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.17 ppb (3) 5.0 μg/m3 (5) 3.0 μg/m3 (13) 30.0
 
Sept. 19, 2021, 5 p.m. 3.8 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (25) 0.18 ppb (3) 8.0 μg/m3 (8) 2.0 μg/m3 (9) 25.0
 
Sept. 19, 2021, 4 p.m. 4.0 ppb (4) 1.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (20) 0.17 ppb (3) 12.0 μg/m3 (12) 2.0 μg/m3 (9) 20.0
 
Sept. 19, 2021, 3 p.m. 3.7 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (16) 0.17 ppb (3) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 2 p.m. 4.1 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 14.0 ppb (13) 0.17 ppb (3) 8.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 1 p.m. 3.6 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 13.0 ppb (13) 0.16 ppb (3) 6.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 11 a.m. 2.8 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (14) 0.16 ppb (3) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 14.0
 
Sept. 19, 2021, 10 a.m. 2.8 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (14) 0.16 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 14.0
 
Sept. 19, 2021, 9 a.m. 2.5 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (14) 0.16 ppb (3) 11.0 μg/m3 (11) 2.0 μg/m3 (9) 14.0
 
Sept. 19, 2021, 8 a.m. 2.6 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (15) 0.17 ppb (3) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 15.0
 
Sept. 19, 2021, 7 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 16.0 ppb (15) 0.18 ppb (3) 8.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2021, 6 a.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (15) 0.16 ppb (3) 10.0 μg/m3 (10) 2.0 μg/m3 (9) 15.0
 
Sept. 19, 2021, 5 a.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (14) 0.17 ppb (3) 8.0 μg/m3 (8) 0.0 μg/m3 (0) 14.0
 
Sept. 19, 2021, 4 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 14.0 ppb (13) 0.17 ppb (3) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 13.0
 
Sept. 19, 2021, 3 a.m. 2.9 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 14.0 ppb (13) 0.18 ppb (3) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 2 a.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 14.0 ppb (13) 0.19 ppb (3) 14.0 μg/m3 (13) 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 1 a.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (17) 0.19 ppb (3) 16.0 μg/m3 (15) 1.0 μg/m3 (5) 17.0
 
Sept. 19, 2021, midnight 3.5 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (17) 0.18 ppb (3) 16.0 μg/m3 (15) 2.0 μg/m3 (9) 17.0
 
Sept. 18, 2021, 11 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 26.0 ppb (25) 0.19 ppb (3) 48.0 μg/m3 (45) 2.0 μg/m3 (9) 45.0
 
Sept. 18, 2021, 10 p.m. 2.7 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) 0.19 ppb (3) 40.0 μg/m3 (38) 5.0 μg/m3 (21) 38.0
 
Sept. 18, 2021, 9 p.m. 3.1 ppb (3) 0.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.19 ppb (3) 35.0 μg/m3 (33) 5.0 μg/m3 (21) 33.0
 
Sept. 18, 2021, 8 p.m. 3.1 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) 0.2 ppb (3) 46.0 μg/m3 (43) 8.0 μg/m3 (34) 43.0
 
Sept. 18, 2021, 7 p.m. 3.4 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) 0.2 ppb (3) 54.0 μg/m3 (50) 8.0 μg/m3 (34) 50.0
 
Sept. 18, 2021, 6 p.m. 3.3 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.22 ppb (3) 75.0 μg/m3 (61) 16.0 μg/m3 (60) 61.0
 
Sept. 18, 2021, 5 p.m. 3.6 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.23 ppb (3) 56.0 μg/m3 (52) 8.0 μg/m3 (34) 52.0
 
Sept. 18, 2021, 4 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.23 ppb (3) 34.0 μg/m3 (32) 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 3 p.m. 3.7 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) 0.23 ppb (3) 31.0 μg/m3 (29) 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2021, 2 p.m. 3.1 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.23 ppb (3) 29.0 μg/m3 (27) 17.0 μg/m3 (62) 62.0
 
Sept. 18, 2021, 1 p.m. 2.4 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) 0.22 ppb (3) 24.0 μg/m3 (23) 16.0 μg/m3 (60) 60.0
 
Sept. 18, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 40.0 μg/m3 (38) 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 11 a.m. 2.2 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) 0.23 ppb (3) 45.0 μg/m3 (42) 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 10 a.m. 2.2 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.24 ppb (3) 33.0 μg/m3 (31) 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 9 a.m. 2.9 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.29 ppb (4) 32.0 μg/m3 (30) 20.0 μg/m3 (68) 68.0
 
Sept. 18, 2021, 8 a.m. 2.9 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) 0.34 ppb (4) 42.0 μg/m3 (39) 27.0 μg/m3 (83) 83.0
 
Sept. 18, 2021, 7 a.m. 3.1 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (45) 0.36 ppb (5) 45.0 μg/m3 (42) 32.0 μg/m3 (93) 93.0
 
Sept. 18, 2021, 6 a.m. 3.0 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.35 ppb (4) 50.0 μg/m3 (47) 29.0 μg/m3 (87) 87.0
 
Sept. 18, 2021, 5 a.m. 3.0 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.34 ppb (4) 46.0 μg/m3 (43) 27.0 μg/m3 (83) 83.0
 
Sept. 18, 2021, 4 a.m. 3.0 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.29 ppb (4) 48.0 μg/m3 (45) 19.0 μg/m3 (66) 66.0
 
Sept. 18, 2021, 3 a.m. 3.3 ppb (4) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (50) 0.26 ppb (4) 56.0 μg/m3 (52) 16.0 μg/m3 (60) 60.0
 
Sept. 18, 2021, 2 a.m. 4.5 ppb (5) 0.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (51) 0.28 ppb (4) 57.0 μg/m3 (52) 11.0 μg/m3 (46) 52.0
 
Sept. 18, 2021, 1 a.m. 4.2 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 60.0 ppb (68) 0.26 ppb (4) 47.0 μg/m3 (44) 15.0 μg/m3 (58) 68.0
 
Sept. 18, 2021, midnight 4.3 ppb (5) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 59.0 ppb (65) 0.24 ppb (3) 44.0 μg/m3 (41) 5.0 μg/m3 (21) 65.0
 
Sept. 17, 2021, 11 p.m. 4.0 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 62.0 ppb (74) 0.26 ppb (4) 53.0 μg/m3 (50) 15.0 μg/m3 (58) 74.0
 
Sept. 17, 2021, 10 p.m. 3.7 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (50) 0.23 ppb (3) 58.0 μg/m3 (53) 15.0 μg/m3 (58) 58.0
 
Sept. 17, 2021, 9 p.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.2 ppb (3) 74.0 μg/m3 (61) 9.0 μg/m3 (38) 61.0
 
Sept. 17, 2021, 8 p.m. 4.7 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (50) 0.21 ppb (3) 54.0 μg/m3 (50) 15.0 μg/m3 (58) 58.0
 
Sept. 17, 2021, 7 p.m. 5.1 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (46) 0.21 ppb (3) 51.0 μg/m3 (48) 10.0 μg/m3 (42) 48.0
 
Sept. 17, 2021, 6 p.m. 5.1 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (40) 0.2 ppb (3) 46.0 μg/m3 (43) 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, 5 p.m. 8.6 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (7) N/A N/A 32.0 ppb (30) 0.21 ppb (3) 82.0 μg/m3 (65) 13.0 μg/m3 (53) 65.0
 
Sept. 17, 2021, 4 p.m. 13.9 ppb (14) 3.7 ppb (4) N/A 10.0 ppb (10) N/A N/A 24.0 ppb (23) 0.27 ppb (4) 55.0 μg/m3 (51) 16.0 μg/m3 (60) 60.0
 
Sept. 17, 2021, 3 p.m. 22.7 ppb (22) 7.1 ppb (7) N/A 16.0 ppb (16) N/A N/A N/A 0.36 ppb (5) 53.0 μg/m3 (50) 16.0 μg/m3 (60) 60.0
 
Sept. 17, 2021, 2 p.m. 23.4 ppb (23) 5.5 ppb (6) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (6) 89.0 μg/m3 (68) 14.0 μg/m3 (55) 68.0
 
Sept. 17, 2021, 1 p.m. 13.0 ppb (13) 1.4 ppb (2) N/A 12.0 ppb (12) N/A N/A N/A 0.2 ppb (3) 26.0 μg/m3 (25) 17.0 μg/m3 (62) 62.0
 
Sept. 17, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 26.0 μg/m3 (25) 14.0 μg/m3 (55) 55.0
 
Sept. 17, 2021, 11 a.m. 8.1 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.12 ppb (2) 21.0 μg/m3 (20) 15.0 μg/m3 (58) 58.0
 
Sept. 17, 2021, 10 a.m. 7.6 ppb (8) 0.4 ppb (1) N/A 7.0 ppb (7) N/A N/A N/A 0.13 ppb (2) 28.0 μg/m3 (26) 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, 9 a.m. 3.6 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.12 ppb (2) 28.0 μg/m3 (26) 12.0 μg/m3 (50) 50.0
 
Sept. 17, 2021, 8 a.m. 3.5 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) 22.0 μg/m3 (21) 12.0 μg/m3 (50) 50.0
 
Sept. 17, 2021, 7 a.m. 2.8 ppb (3) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (3) 29.0 μg/m3 (27) 11.0 μg/m3 (46) 46.0
 
Sept. 17, 2021, 6 a.m. 3.9 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) 40.0 μg/m3 (38) 18.0 μg/m3 (64) 64.0
 
Sept. 17, 2021, 5 a.m. 6.1 ppb (6) 0.3 ppb (1) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (4) 36.0 μg/m3 (34) 17.0 μg/m3 (62) 62.0
 
Sept. 17, 2021, 4 a.m. 8.2 ppb (8) 0.4 ppb (1) N/A 8.0 ppb (8) N/A N/A N/A 0.37 ppb (5) 40.0 μg/m3 (38) 18.0 μg/m3 (64) 64.0
 
Sept. 17, 2021, 3 a.m. 9.3 ppb (9) 0.3 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A 0.46 ppb (6) 50.0 μg/m3 (47) 19.0 μg/m3 (66) 66.0
 
Sept. 17, 2021, 2 a.m. 8.8 ppb (9) 0.3 ppb (1) N/A 9.0 ppb (9) N/A N/A N/A 0.49 ppb (6) 51.0 μg/m3 (48) 12.0 μg/m3 (50) 50.0
 
Sept. 17, 2021, 1 a.m. 5.1 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.45 ppb (6) 50.0 μg/m3 (47) 13.0 μg/m3 (53) 53.0
 
Sept. 17, 2021, midnight 3.5 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (48) 0.43 ppb (5) 51.0 μg/m3 (48) 12.0 μg/m3 (50) 50.0
 
Sept. 16, 2021, 11 p.m. 4.2 ppb (4) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.44 ppb (5) 79.0 μg/m3 (63) 16.0 μg/m3 (60) 63.0
 
Sept. 16, 2021, 10 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (49) 0.39 ppb (5) 66.0 μg/m3 (57) 12.0 μg/m3 (50) 57.0
 
Sept. 16, 2021, 9 p.m. 4.3 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (47) 0.36 ppb (5) 62.0 μg/m3 (55) 13.0 μg/m3 (53) 55.0
 
Sept. 16, 2021, 8 p.m. 4.4 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) 103.0 μg/m3 (75) 15.0 μg/m3 (58) 75.0
 
Sept. 16, 2021, 7 p.m. 4.4 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A N/A 71.0 μg/m3 (59) 14.0 μg/m3 (55) 59.0
 
Sept. 16, 2021, 6 p.m. 5.1 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (38) N/A 50.0 μg/m3 (47) 12.0 μg/m3 (50) 50.0
 
Sept. 16, 2021, 5 p.m. 8.0 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) N/A 32.0 μg/m3 (30) 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 4 p.m. 9.8 ppb (10) 2.3 ppb (3) N/A 8.0 ppb (8) N/A N/A 29.0 ppb (27) N/A 41.0 μg/m3 (38) 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 3 p.m. 12.1 ppb (12) 2.5 ppb (3) N/A 10.0 ppb (10) N/A N/A 24.0 ppb (23) N/A 37.0 μg/m3 (35) 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 2 p.m. 15.5 ppb (15) 2.4 ppb (3) N/A 13.0 ppb (13) N/A N/A 15.0 ppb (14) N/A 55.0 μg/m3 (51) 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 1 p.m. 10.0 ppb (10) 0.6 ppb (1) N/A 10.0 ppb (10) N/A N/A 17.0 ppb (16) N/A 29.0 μg/m3 (27) 14.0 μg/m3 (55) 55.0
 
Sept. 16, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (26) 16.0 μg/m3 (60) 60.0
 
Sept. 16, 2021, 11 a.m. 4.0 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (28) N/A 26.0 μg/m3 (25) 14.0 μg/m3 (55) 55.0
 
Sept. 16, 2021, 10 a.m. 4.0 ppb (4) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) N/A 31.0 μg/m3 (29) 13.0 μg/m3 (53) 53.0
 
Sept. 16, 2021, 9 a.m. 3.6 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A 30.0 μg/m3 (28) 11.0 μg/m3 (46) 46.0
 
Sept. 16, 2021, 8 a.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) 0.24 ppb (3) 28.0 μg/m3 (26) 19.0 μg/m3 (66) 66.0
 
Sept. 16, 2021, 7 a.m. 3.7 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.24 ppb (3) 38.0 μg/m3 (36) 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 6 a.m. 4.9 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (34) 0.25 ppb (3) 39.0 μg/m3 (37) 16.0 μg/m3 (60) 60.0
 
Sept. 16, 2021, 5 a.m. 5.2 ppb (5) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (37) 0.27 ppb (4) 44.0 μg/m3 (41) 16.0 μg/m3 (60) 60.0
 
Sept. 16, 2021, 4 a.m. 4.4 ppb (5) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (48) 0.28 ppb (4) 51.0 μg/m3 (48) 17.0 μg/m3 (62) 62.0
 
Sept. 16, 2021, 3 a.m. 4.6 ppb (5) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (58) 0.34 ppb (4) 51.0 μg/m3 (48) 25.0 μg/m3 (79) 79.0
 
Sept. 16, 2021, 2 a.m. 5.6 ppb (6) 0.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (55) 0.36 ppb (5) 60.0 μg/m3 (54) 24.0 μg/m3 (77) 77.0
 
Sept. 16, 2021, 1 a.m. 5.5 ppb (6) 0.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (55) 0.34 ppb (4) 59.0 μg/m3 (53) 20.0 μg/m3 (68) 68.0
 
Sept. 16, 2021, midnight 4.7 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.33 ppb (4) 53.0 μg/m3 (50) 18.0 μg/m3 (64) 64.0
 
Sept. 15, 2021, 11 p.m. 4.4 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 64.0 ppb (81) 0.36 ppb (5) 64.0 μg/m3 (56) 24.0 μg/m3 (77) 81.0
 
Sept. 15, 2021, 10 p.m. 4.8 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 62.0 ppb (74) 0.35 ppb (4) 67.0 μg/m3 (57) 23.0 μg/m3 (74) 74.0
 
Sept. 15, 2021, 9 p.m. 4.9 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 58.0 ppb (61) 0.36 ppb (5) 92.0 μg/m3 (70) 24.0 μg/m3 (77) 77.0
 
Sept. 15, 2021, 8 p.m. 6.1 ppb (6) 1.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (55) 0.34 ppb (4) 121.0 μg/m3 (84) 25.0 μg/m3 (79) 84.0
 
Sept. 15, 2021, 7 p.m. 6.0 ppb (6) 1.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (50) 0.33 ppb (4) 100.0 μg/m3 (74) 25.0 μg/m3 (79) 79.0
 
Sept. 15, 2021, 6 p.m. 7.4 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A N/A 48.0 ppb (45) 0.33 ppb (4) 87.0 μg/m3 (67) 22.0 μg/m3 (72) 72.0
 
Sept. 15, 2021, 5 p.m. 9.6 ppb (10) 1.4 ppb (2) N/A 8.0 ppb (8) N/A N/A 44.0 ppb (41) 0.34 ppb (4) 50.0 μg/m3 (47) 22.0 μg/m3 (72) 72.0
 
Sept. 15, 2021, 4 p.m. 12.8 ppb (13) 2.1 ppb (2) N/A 11.0 ppb (11) N/A N/A 34.0 ppb (32) 0.43 ppb (5) 54.0 μg/m3 (50) 22.0 μg/m3 (72) 72.0
 
Sept. 15, 2021, 3 p.m. 15.0 ppb (15) 3.0 ppb (3) N/A 12.0 ppb (12) N/A N/A 23.0 ppb (22) 0.55 ppb (7) 126.0 μg/m3 (87) 29.0 μg/m3 (87) 87.0
 
Sept. 15, 2021, 2 p.m. 16.4 ppb (16) 2.6 ppb (3) N/A 14.0 ppb (14) N/A N/A 13.0 ppb (13) 0.55 ppb (7) 72.0 μg/m3 (60) 36.0 μg/m3 (103) 103.0
 
Sept. 15, 2021, 1 p.m. 15.5 ppb (15) 1.8 ppb (2) N/A 14.0 ppb (14) N/A N/A 12.0 ppb (12) 0.64 ppb (7) 49.0 μg/m3 (46) 27.0 μg/m3 (83) 83.0
 
Sept. 15, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A 54.0 μg/m3 (50) 30.0 μg/m3 (89) 89.0
 
Sept. 15, 2021, 11 a.m. 9.1 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A N/A 22.0 ppb (21) 0.35 ppb (4) 53.0 μg/m3 (50) 32.0 μg/m3 (93) 93.0
 
Sept. 15, 2021, 10 a.m. 8.0 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (7) N/A N/A 28.0 ppb (26) 0.33 ppb (4) 47.0 μg/m3 (44) 31.0 μg/m3 (91) 91.0
 
Sept. 15, 2021, 9 a.m. 7.7 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (7) N/A N/A 35.0 ppb (33) 0.31 ppb (4) 48.0 μg/m3 (45) 29.0 μg/m3 (87) 87.0
 
Sept. 15, 2021, 8 a.m. 6.2 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (42) 0.33 ppb (4) 48.0 μg/m3 (45) 29.0 μg/m3 (87) 87.0
 
Sept. 15, 2021, 7 a.m. 4.6 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (49) 0.34 ppb (4) 44.0 μg/m3 (41) 24.0 μg/m3 (77) 77.0
 
Sept. 15, 2021, 6 a.m. 4.6 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (51) 0.3 ppb (4) 46.0 μg/m3 (43) 27.0 μg/m3 (83) 83.0
 
Sept. 15, 2021, 5 a.m. 6.5 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (50) 0.33 ppb (4) 45.0 μg/m3 (42) 28.0 μg/m3 (85) 85.0
 
Sept. 15, 2021, 4 a.m. 7.6 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (7) N/A N/A 50.0 ppb (47) 0.37 ppb (5) 54.0 μg/m3 (50) 29.0 μg/m3 (87) 87.0
 
Sept. 15, 2021, 3 a.m. 8.9 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (8) N/A N/A 49.0 ppb (46) 0.41 ppb (5) 69.0 μg/m3 (58) 34.0 μg/m3 (98) 98.0
 
Sept. 15, 2021, 2 a.m. 9.0 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (8) N/A N/A 54.0 ppb (50) 0.42 ppb (5) 64.0 μg/m3 (56) 33.0 μg/m3 (95) 95.0
 
Sept. 15, 2021, 1 a.m. 6.3 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 64.0 ppb (81) 0.33 ppb (4) 56.0 μg/m3 (52) 26.0 μg/m3 (81) 81.0
 
Sept. 15, 2021, midnight 5.9 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 61.0 ppb (71) 0.34 ppb (4) 54.0 μg/m3 (50) 30.0 μg/m3 (89) 89.0
 
Sept. 14, 2021, 11 p.m. 5.9 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 67.0 ppb (91) 0.34 ppb (4) 84.0 μg/m3 (66) 29.0 μg/m3 (87) 91.0
 
Sept. 14, 2021, 10 p.m. 6.1 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 67.0 ppb (91) 0.34 ppb (4) 87.0 μg/m3 (67) 33.0 μg/m3 (95) 95.0
 
Sept. 14, 2021, 9 p.m. 6.3 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 65.0 ppb (84) 0.36 ppb (5) 95.0 μg/m3 (71) 42.0 μg/m3 (118) 118.0
 
Sept. 14, 2021, 8 p.m. 6.4 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 61.0 ppb (71) 0.37 ppb (5) 84.0 μg/m3 (66) 37.0 μg/m3 (105) 105.0
 
Sept. 14, 2021, 7 p.m. 7.5 ppb (8) 1.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 57.0 ppb (58) 0.4 ppb (5) 122.0 μg/m3 (85) 44.0 μg/m3 (122) 122.0
 
Sept. 14, 2021, 6 p.m. 8.2 ppb (8) 1.2 ppb (2) N/A 7.0 ppb (7) N/A N/A 49.0 ppb (46) 0.41 ppb (5) 93.0 μg/m3 (70) 42.0 μg/m3 (118) 118.0
 
Sept. 14, 2021, 5 p.m. 10.1 ppb (10) 1.5 ppb (2) N/A 9.0 ppb (9) N/A N/A 43.0 ppb (40) 0.41 ppb (5) 73.0 μg/m3 (60) 36.0 μg/m3 (103) 103.0
 
Sept. 14, 2021, 4 p.m. 15.2 ppb (15) 3.4 ppb (4) N/A 12.0 ppb (12) N/A N/A 32.0 ppb (30) 0.48 ppb (6) 77.0 μg/m3 (62) 45.0 μg/m3 (125) 125.0