ID: 5320

AQSQID: 000102503

Site Name: Terrace Skeena Middle School

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

Updated: July 28, 2021, 7:53 p.m.

Location: Terrace (Munroe St), CC

Reporting: True, Located: True

Current AQI: 20.0

Terrace (Munroe St) CC, CA: 54.5217, -128.6075

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 28, 2021, 6 p.m. N/A 1.4 ppb (2) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A 4.8 μg/m3 (20) 20.0
 
July 28, 2021, 5 p.m. N/A 2.3 ppb (3) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 5.6 μg/m3 (24) 24.0
 
July 28, 2021, 4 p.m. N/A 5.1 ppb (5) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 4.5 μg/m3 (19) 19.0
 
July 28, 2021, 3 p.m. N/A 2.7 ppb (3) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 3.4 μg/m3 (15) 15.0
 
July 28, 2021, 2 p.m. N/A 1.1 ppb (2) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 3.2 μg/m3 (14) 14.0
 
July 28, 2021, 1 p.m. N/A 1.6 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 3.0 μg/m3 (13) 13.0
 
July 28, 2021, noon N/A 0.6 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 3.0 μg/m3 (13) 13.0
 
July 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
July 28, 2021, 10 a.m. N/A 0.1 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 3.1 μg/m3 (13) 13.0
 
July 28, 2021, 9 a.m. N/A 0.1 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 3.4 μg/m3 (15) 15.0
 
July 28, 2021, 8 a.m. N/A 0.1 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 3.7 μg/m3 (16) 16.0
 
July 28, 2021, 7 a.m. N/A 0.5 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 7.0 ppb (7) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 28, 2021, 6 a.m. N/A 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 14.0 ppb (13) N/A N/A 4.0 μg/m3 (17) 17.0
 
July 28, 2021, 5 a.m. N/A 0.2 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 2.7 μg/m3 (12) 19.0
 
July 28, 2021, 4 a.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 2.5 μg/m3 (11) 21.0
 
July 28, 2021, 3 a.m. N/A 0.2 ppb (1) N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A N/A 2.3 μg/m3 (10) 22.0
 
July 28, 2021, 2 a.m. N/A 0.2 ppb (1) N/A N/A N/A 1.0 ppb (2) 24.0 ppb (23) N/A N/A 2.3 μg/m3 (10) 23.0
 
July 28, 2021, 1 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 2.7 μg/m3 (12) 24.0
 
July 28, 2021, midnight N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 3.0 μg/m3 (13) 24.0
 
July 27, 2021, 11 p.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 2.3 μg/m3 (10) 25.0
 
July 27, 2021, 10 p.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 2.4 μg/m3 (10) 25.0
 
July 27, 2021, 9 p.m. N/A 0.0 ppb (0) N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 2.4 μg/m3 (10) 23.0
 
July 27, 2021, 8 p.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 2.8 μg/m3 (12) 23.0
 
July 27, 2021, 7 p.m. N/A 0.4 ppb (1) N/A N/A N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A 4.0 μg/m3 (17) 22.0
 
July 27, 2021, 6 p.m. N/A 0.4 ppb (1) N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 4.5 μg/m3 (19) 20.0
 
July 27, 2021, 5 p.m. N/A 0.5 ppb (1) N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 4.1 μg/m3 (18) 18.0
 
July 27, 2021, 4 p.m. N/A 1.4 ppb (2) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 13.0 ppb (13) N/A N/A 4.0 μg/m3 (17) 17.0
 
July 27, 2021, 3 p.m. N/A 0.5 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 4.0 μg/m3 (17) 17.0
 
July 27, 2021, 2 p.m. N/A 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 4.0 μg/m3 (17) 17.0
 
July 27, 2021, 1 p.m. N/A 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 27, 2021, noon N/A 0.6 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 10.0 ppb (10) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 27, 2021, 11 a.m. N/A 0.1 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 10.0 ppb (10) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.3 μg/m3 (14) 14.0
 
July 27, 2021, 9 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 27, 2021, 8 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 13.0 ppb (13) N/A N/A 3.4 μg/m3 (15) 15.0
 
July 27, 2021, 7 a.m. N/A 0.0 ppb (0) N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 3.2 μg/m3 (14) 16.0
 
July 27, 2021, 6 a.m. N/A 0.0 ppb (0) N/A N/A N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 3.4 μg/m3 (15) 17.0
 
July 27, 2021, 5 a.m. N/A 0.1 ppb (1) N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A N/A 3.2 μg/m3 (14) 17.0
 
July 27, 2021, 4 a.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 3.4 μg/m3 (15) 19.0
 
July 27, 2021, 3 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 3.5 μg/m3 (15) 20.0
 
July 27, 2021, 2 a.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 4.2 μg/m3 (18) 20.0
 
July 27, 2021, 1 a.m. N/A 0.3 ppb (1) N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 4.6 μg/m3 (20) 20.0
 
July 27, 2021, midnight N/A 0.5 ppb (1) N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 4.0 μg/m3 (17) 20.0
 
July 26, 2021, 11 p.m. N/A 0.7 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 2.4 μg/m3 (10) 18.0
 
July 26, 2021, 10 p.m. N/A 1.5 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 2.5 μg/m3 (11) 14.0
 
July 26, 2021, 9 p.m. N/A 1.2 ppb (2) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 4.2 μg/m3 (18) 18.0
 
July 26, 2021, 8 p.m. N/A 1.1 ppb (2) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 10.0 ppb (10) N/A N/A 3.6 μg/m3 (16) 16.0
 
July 26, 2021, 7 p.m. N/A 1.7 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 9.0 ppb (9) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 26, 2021, 6 p.m. N/A 2.8 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 3.7 μg/m3 (16) 16.0
 
July 26, 2021, 5 p.m. N/A 1.5 ppb (2) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 2.0 μg/m3 (9) 9.0
 
July 26, 2021, 4 p.m. N/A 2.3 ppb (3) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 3.4 μg/m3 (15) 15.0
 
July 26, 2021, 3 p.m. N/A 3.3 ppb (4) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 2.0 μg/m3 (9) 9.0
 
July 26, 2021, 2 p.m. N/A 1.9 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 26, 2021, 1 p.m. N/A 0.9 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.1 μg/m3 (5) 5.0
 
July 26, 2021, noon N/A 0.4 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.6 μg/m3 (7) 7.0
 
July 26, 2021, 11 a.m. N/A 0.1 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 26, 2021, 10 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 2.3 μg/m3 (10) 10.0
 
July 26, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.1 μg/m3 (13) 13.0
 
July 26, 2021, 8 a.m. N/A 0.1 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 3.1 μg/m3 (13) 13.0
 
July 26, 2021, 7 a.m. N/A 0.1 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 2.9 μg/m3 (13) 13.0
 
July 26, 2021, 6 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 7.0 ppb (7) N/A N/A 2.3 μg/m3 (10) 10.0
 
July 26, 2021, 5 a.m. N/A 0.3 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 2.5 μg/m3 (11) 11.0
 
July 26, 2021, 4 a.m. N/A 0.6 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 13.0 ppb (13) N/A N/A 2.3 μg/m3 (10) 13.0
 
July 26, 2021, 3 a.m. N/A 0.3 ppb (1) N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 2.5 μg/m3 (11) 14.0
 
July 26, 2021, 2 a.m. N/A 0.2 ppb (1) N/A N/A N/A 1.0 ppb (2) 16.0 ppb (15) N/A N/A 2.7 μg/m3 (12) 15.0
 
July 26, 2021, 1 a.m. N/A 0.0 ppb (0) N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) N/A N/A 2.7 μg/m3 (12) 16.0
 
July 26, 2021, midnight N/A 0.0 ppb (0) N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 2.5 μg/m3 (11) 16.0
 
July 25, 2021, 11 p.m. N/A 0.3 ppb (1) N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 1.4 μg/m3 (6) 16.0
 
July 25, 2021, 10 p.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 1.4 μg/m3 (6) 16.0
 
July 25, 2021, 9 p.m. N/A 0.3 ppb (1) N/A N/A N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 1.4 μg/m3 (6) 16.0
 
July 25, 2021, 8 p.m. N/A 0.4 ppb (1) N/A N/A N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 1.9 μg/m3 (8) 15.0
 
July 25, 2021, 7 p.m. N/A 0.2 ppb (1) N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 2.6 μg/m3 (11) 14.0
 
July 25, 2021, 6 p.m. N/A 1.9 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 9.0 ppb (9) N/A N/A 3.4 μg/m3 (15) 15.0
 
July 25, 2021, 5 p.m. N/A 0.7 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 3.1 μg/m3 (13) 13.0
 
July 25, 2021, 4 p.m. N/A 0.9 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 7.0 ppb (7) N/A N/A 2.2 μg/m3 (10) 10.0
 
July 25, 2021, 3 p.m. N/A 1.9 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 1.6 μg/m3 (7) 7.0
 
July 25, 2021, 2 p.m. N/A 4.2 ppb (4) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.6 μg/m3 (7) 7.0
 
July 25, 2021, 1 p.m. N/A 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 1.7 μg/m3 (8) 8.0
 
July 25, 2021, noon N/A 0.7 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 25, 2021, 11 a.m. N/A 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.7 μg/m3 (8) 8.0
 
July 25, 2021, 10 a.m. N/A 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.8 μg/m3 (8) 8.0
 
July 25, 2021, 9 a.m. N/A 0.5 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 2.0 μg/m3 (9) 9.0
 
July 25, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.3 μg/m3 (10) 10.0
 
July 25, 2021, 7 a.m. N/A 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 3.2 μg/m3 (14) 14.0
 
July 25, 2021, 6 a.m. N/A 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 2.6 μg/m3 (11) 11.0
 
July 25, 2021, 5 a.m. N/A 0.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 7.0 ppb (7) N/A N/A 7.1 μg/m3 (30) 30.0
 
July 25, 2021, 4 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 1.9 μg/m3 (8) 14.0
 
July 25, 2021, 3 a.m. N/A 0.1 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 0.9 μg/m3 (4) 17.0
 
July 25, 2021, 2 a.m. N/A 0.5 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 1.1 μg/m3 (5) 15.0
 
July 25, 2021, 1 a.m. N/A 0.5 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 1.0 μg/m3 (5) 17.0
 
July 25, 2021, midnight N/A 0.3 ppb (1) N/A N/A N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 0.8 μg/m3 (4) 19.0
 
July 24, 2021, 11 p.m. N/A 1.2 ppb (2) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 0.9 μg/m3 (4) 18.0
 
July 24, 2021, 10 p.m. N/A 0.5 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 0.6 μg/m3 (3) 18.0
 
July 24, 2021, 9 p.m. N/A 0.2 ppb (1) N/A N/A N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 0.7 μg/m3 (3) 19.0
 
July 24, 2021, 8 p.m. N/A 0.4 ppb (1) N/A N/A N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 1.2 μg/m3 (5) 20.0
 
July 24, 2021, 7 p.m. N/A 0.3 ppb (1) N/A N/A N/A 1.0 ppb (2) 21.0 ppb (20) N/A N/A 1.7 μg/m3 (8) 20.0
 
July 24, 2021, 6 p.m. N/A 0.2 ppb (1) N/A N/A N/A 1.0 ppb (2) 22.0 ppb (21) N/A N/A 1.7 μg/m3 (8) 21.0
 
July 24, 2021, 5 p.m. N/A 0.3 ppb (1) N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 1.4 μg/m3 (6) 19.0
 
July 24, 2021, 4 p.m. N/A 0.4 ppb (1) N/A N/A N/A 2.0 ppb (3) 18.0 ppb (17) N/A N/A 3.6 μg/m3 (16) 17.0
 
July 24, 2021, 3 p.m. N/A 0.3 ppb (1) N/A N/A N/A 1.0 ppb (2) 13.0 ppb (13) N/A N/A 1.5 μg/m3 (7) 13.0
 
July 24, 2021, 2 p.m. N/A 0.4 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 0.7 μg/m3 (3) 11.0
 
July 24, 2021, 1 p.m. N/A 1.3 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 1.5 μg/m3 (7) 7.0
 
July 24, 2021, noon N/A 0.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 1.3 μg/m3 (6) 6.0
 
July 24, 2021, 11 a.m. N/A 0.2 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 0.7 μg/m3 (3) 11.0
 
July 24, 2021, 10 a.m. N/A 0.0 ppb (0) N/A N/A N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 0.4 μg/m3 (2) 15.0
 
July 24, 2021, 9 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 0.6 μg/m3 (3) 15.0
 
July 24, 2021, 8 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 0.9 μg/m3 (4) 15.0
 
July 24, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 24, 2021, 6 a.m. N/A 0.1 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 1.3 μg/m3 (6) 17.0
 
July 24, 2021, 5 a.m. N/A 0.2 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 1.4 μg/m3 (6) 18.0
 
July 24, 2021, 4 a.m. N/A 0.0 ppb (0) N/A N/A N/A 2.0 ppb (3) 21.0 ppb (20) N/A N/A 1.1 μg/m3 (5) 20.0
 
July 24, 2021, 3 a.m. N/A 0.1 ppb (1) N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A N/A 0.6 μg/m3 (3) 19.0
 
July 24, 2021, 2 a.m. N/A 0.1 ppb (1) N/A N/A N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 0.4 μg/m3 (2) 18.0
 
July 24, 2021, 1 a.m. N/A 0.2 ppb (1) N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) N/A N/A 0.3 μg/m3 (2) 16.0
 
July 24, 2021, midnight N/A 0.5 ppb (1) N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 0.7 μg/m3 (3) 14.0
 
July 23, 2021, 11 p.m. N/A 0.4 ppb (1) N/A -1.0 ppb (0) N/A 1.0 ppb (2) 14.0 ppb (13) N/A N/A 1.4 μg/m3 (6) 13.0
 
July 23, 2021, 10 p.m. N/A 0.5 ppb (1) N/A -1.0 ppb (0) N/A 1.0 ppb (2) 15.0 ppb (14) N/A N/A 1.2 μg/m3 (5) 14.0
 
July 23, 2021, 9 p.m. N/A 0.4 ppb (1) N/A N/A N/A 0.0 ppb (0) 13.0 ppb (13) N/A N/A 1.2 μg/m3 (5) 13.0
 
July 23, 2021, 8 p.m. N/A 0.8 ppb (1) N/A N/A N/A 1.0 ppb (2) 12.0 ppb (12) N/A N/A 1.4 μg/m3 (6) 12.0
 
July 23, 2021, 7 p.m. N/A 0.9 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 2.1 μg/m3 (9) 9.0
 
July 23, 2021, 6 p.m. N/A 0.9 ppb (1) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 7.0 ppb (7) N/A N/A 2.8 μg/m3 (12) 12.0
 
July 23, 2021, 5 p.m. N/A 0.8 ppb (1) N/A -1.0 ppb (0) N/A 1.0 ppb (2) 8.0 ppb (8) N/A N/A 2.0 μg/m3 (9) 9.0
 
July 23, 2021, 4 p.m. N/A 3.4 ppb (4) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 5.0 ppb (5) N/A N/A 2.4 μg/m3 (10) 10.0
 
July 23, 2021, 3 p.m. N/A 3.4 ppb (4) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 2.9 μg/m3 (13) 13.0
 
July 23, 2021, 2 p.m. N/A 1.4 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 2.3 μg/m3 (10) 10.0
 
July 23, 2021, 1 p.m. N/A 0.4 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 1.6 μg/m3 (7) 7.0
 
July 23, 2021, noon N/A 0.2 ppb (1) N/A -1.0 ppb (0) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 1.3 μg/m3 (6) 6.0
 
July 23, 2021, 11 a.m. N/A 0.1 ppb (1) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 1.3 μg/m3 (6) 6.0
 
July 23, 2021, 10 a.m. N/A 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 1.6 μg/m3 (7) 7.0
 
July 23, 2021, 9 a.m. N/A 0.0 ppb (0) N/A 0.0 ppb (0) N/A 1.0 ppb (2) 8.0 ppb (8) N/A N/A 1.1 μg/m3 (5) 8.0
 
July 23, 2021, 8 a.m. N/A -0.1 ppb (0) N/A N/A N/A 1.0 ppb (2) 11.0 ppb (11) N/A N/A 2.4 μg/m3 (10) 11.0
 
July 23, 2021, 7 a.m. N/A 0.0 ppb (0) N/A N/A N/A 1.0 ppb (2) 14.0 ppb (13) N/A N/A 1.0 μg/m3 (5) 13.0
 
July 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 23, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.5 μg/m3 (3) 3.0
 
July 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.5 μg/m3 (3) 3.0
 
July 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
July 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 23, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
July 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 22, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
July 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
July 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
July 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.6 μg/m3 (3) 3.0
 
July 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.6 μg/m3 (3) 3.0
 
July 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.6 μg/m3 (3) 3.0
 
July 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.6 μg/m3 (3) 3.0
 
July 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
July 22, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.2 μg/m3 (5) 5.0
 
July 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
July 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.3 μg/m3 (6) 6.0
 
July 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
July 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.8 μg/m3 (4) 4.0
 
July 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.7 μg/m3 (3) 3.0
 
July 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 22, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
July 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
July 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0
 
July 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
July 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.9 μg/m3 (4) 4.0