ID: 1406

AQSQID: 410470041

Site Name: Salem - State Hospital

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

Updated: July 31, 2021, 4:55 a.m.

Location: Salem (23rd St Neast), OR

Reporting: True, Located: True

Current AQI: 45.0

Salem (23rd St Neast) OR, US: 44.943114, -123.005934

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 24, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A 3.9 μg/m3 (17) 35.0
 
July 23, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
July 23, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.1 μg/m3 (18) 39.0
 
July 23, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.2 μg/m3 (14) 38.0
 
July 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 2.8 μg/m3 (12) 37.0
 
July 23, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.1 μg/m3 (13) 33.0
 
July 23, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.2 μg/m3 (14) 27.0
 
July 23, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 3.1 μg/m3 (13) 23.0
 
July 23, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.3 μg/m3 (14) 17.0
 
July 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 3.2 μg/m3 (14) 15.0
 
July 23, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 3.8 μg/m3 (16) 16.0
 
July 23, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 3.3 μg/m3 (14) 14.0
 
July 23, 2021, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 3.2 μg/m3 (14) 15.0
 
July 23, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.5 μg/m3 (11) 19.0
 
July 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.5 μg/m3 (11) 18.0
 
July 23, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.6 μg/m3 (11) 19.0
 
July 23, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.8 μg/m3 (12) 20.0
 
July 23, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.1 μg/m3 (13) 22.0
 
July 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.8 μg/m3 (12) 21.0
 
July 23, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
July 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 2.5 μg/m3 (11) 22.0
 
July 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.6 μg/m3 (11) 23.0
 
July 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 2.7 μg/m3 (12) 23.0
 
July 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.5 μg/m3 (15) 26.0
 
July 23, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 3.2 μg/m3 (14) 32.0
 
July 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.3 μg/m3 (10) 32.0
 
July 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 2.7 μg/m3 (12) 31.0
 
July 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 2.5 μg/m3 (11) 30.0
 
July 22, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 2.4 μg/m3 (10) 28.0
 
July 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.4 μg/m3 (10) 26.0
 
July 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 2.6 μg/m3 (11) 24.0
 
July 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.6 μg/m3 (11) 20.0
 
July 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.7 μg/m3 (12) 19.0
 
July 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 2.9 μg/m3 (13) 16.0
 
July 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 3.0 μg/m3 (13) 13.0
 
July 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A N/A 3.5 μg/m3 (15) 15.0
 
July 22, 2021, noon N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A N/A 2.9 μg/m3 (13) 13.0
 
July 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A N/A 2.9 μg/m3 (13) 13.0
 
July 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 2.7 μg/m3 (12) 12.0
 
July 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 2.8 μg/m3 (12) 12.0
 
July 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 2.4 μg/m3 (10) 13.0
 
July 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.2 μg/m3 (10) 15.0
 
July 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.2 μg/m3 (10) 18.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.2 μg/m3 (10) 19.0
 
July 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.2 μg/m3 (10) 20.0
 
July 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 2.3 μg/m3 (10) 22.0
 
July 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
July 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 2.9 μg/m3 (13) 27.0
 
July 22, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.0 μg/m3 (13) 27.0
 
July 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.2 μg/m3 (14) 27.0
 
July 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 4.5 μg/m3 (19) 25.0
 
July 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 7.9 μg/m3 (33) 33.0
 
July 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 19.0 μg/m3 (66) 66.0
 
July 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 31.6 μg/m3 (93) 93.0
 
July 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 2.8 μg/m3 (12) 24.0
 
July 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.9 μg/m3 (13) 21.0
 
July 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.8 μg/m3 (12) 18.0
 
July 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 2.9 μg/m3 (13) 16.0
 
July 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.9 μg/m3 (13) 15.0
 
July 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.6 μg/m3 (11) 15.0
 
July 21, 2021, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 2.6 μg/m3 (11) 14.0
 
July 21, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 2.4 μg/m3 (10) 17.0
 
July 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.3 μg/m3 (10) 19.0
 
July 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.3 μg/m3 (10) 19.0
 
July 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.6 μg/m3 (11) 21.0
 
July 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.8 μg/m3 (12) 20.0
 
July 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.9 μg/m3 (13) 21.0
 
July 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 3.0 μg/m3 (13) 21.0
 
July 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.2 μg/m3 (14) 22.0
 
July 21, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.5 μg/m3 (15) 22.0
 
July 21, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.8 μg/m3 (16) 22.0
 
July 21, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 4.5 μg/m3 (19) 23.0
 
July 21, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.8 μg/m3 (16) 29.0
 
July 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.9 μg/m3 (17) 31.0
 
July 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 14.8 μg/m3 (57) 57.0
 
July 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 4.6 μg/m3 (20) 26.0
 
July 20, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 8.4 μg/m3 (36) 36.0
 
July 20, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 12.3 μg/m3 (52) 52.0
 
July 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 13.1 μg/m3 (54) 54.0
 
July 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 15.1 μg/m3 (58) 58.0
 
July 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 4.3 μg/m3 (18) 18.0
 
July 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 6.1 μg/m3 (26) 26.0
 
July 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 3.4 μg/m3 (15) 15.0
 
July 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A N/A 2.3 μg/m3 (10) 10.0
 
July 20, 2021, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 1.7 μg/m3 (8) 13.0
 
July 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 1.7 μg/m3 (8) 14.0
 
July 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 1.8 μg/m3 (8) 14.0
 
July 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A N/A 2.0 μg/m3 (9) 14.0
 
July 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 2.0 μg/m3 (9) 17.0
 
July 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 2.0 μg/m3 (9) 17.0
 
July 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.1 μg/m3 (9) 18.0
 
July 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.1 μg/m3 (9) 18.0
 
July 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.0 μg/m3 (9) 19.0
 
July 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 2.0 μg/m3 (9) 21.0
 
July 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 2.2 μg/m3 (10) 24.0
 
July 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 2.4 μg/m3 (10) 25.0
 
July 20, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
July 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.1 μg/m3 (13) 28.0
 
July 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.4 μg/m3 (15) 31.0
 
July 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.3 μg/m3 (14) 31.0
 
July 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 2.8 μg/m3 (12) 32.0
 
July 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.7 μg/m3 (16) 33.0
 
July 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.9 μg/m3 (17) 28.0
 
July 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 4.2 μg/m3 (18) 21.0
 
July 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.8 μg/m3 (16) 17.0
 
July 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 3.3 μg/m3 (14) 14.0
 
July 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 3.0 μg/m3 (13) 13.0
 
July 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A N/A 2.8 μg/m3 (12) 12.0
 
July 19, 2021, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 2.8 μg/m3 (12) 12.0
 
July 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A N/A 2.7 μg/m3 (12) 13.0
 
July 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 2.7 μg/m3 (12) 12.0
 
July 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 2.7 μg/m3 (12) 13.0
 
July 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.7 μg/m3 (12) 15.0
 
July 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.8 μg/m3 (12) 15.0
 
July 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 3.2 μg/m3 (14) 16.0
 
July 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.1 μg/m3 (13) 17.0
 
July 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 3.2 μg/m3 (14) 19.0
 
July 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 3.3 μg/m3 (14) 19.0
 
July 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A N/A 3.5 μg/m3 (15) 23.0
 
July 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A 3.2 μg/m3 (14) 31.0
 
July 19, 2021, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 3.2 μg/m3 (14) 34.0
 
July 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
July 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.1 μg/m3 (13) 30.0
 
July 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.6 μg/m3 (16) 29.0
 
July 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.7 μg/m3 (16) 29.0
 
July 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A N/A 3.4 μg/m3 (15) 26.0
 
July 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A N/A 3.2 μg/m3 (14) 25.0
 
July 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 3.3 μg/m3 (14) 22.0
 
July 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 3.3 μg/m3 (14) 18.0
 
July 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 3.2 μg/m3 (14) 16.0
 
July 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 3.0 μg/m3 (13) 15.0
 
July 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 3.0 μg/m3 (13) 15.0
 
July 18, 2021, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 2.7 μg/m3 (12) 16.0
 
July 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.6 μg/m3 (11) 18.0
 
July 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.6 μg/m3 (11) 18.0
 
July 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 2.6 μg/m3 (11) 16.0
 
July 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 3.2 μg/m3 (14) 17.0
 
July 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A N/A 2.6 μg/m3 (11) 19.0
 
July 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.5 μg/m3 (11) 20.0
 
July 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.4 μg/m3 (10) 20.0
 
July 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.6 μg/m3 (11) 20.0
 
July 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.7 μg/m3 (12) 20.0
 
July 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A N/A 2.8 μg/m3 (12) 20.0
 
July 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 3.1 μg/m3 (13) 21.0
 
July 18, 2021, midnight N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 3.4 μg/m3 (15) 24.0
 
July 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
July 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.1 μg/m3 (13) 30.0
 
July 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A N/A 3.5 μg/m3 (15) 30.0
 
July 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A N/A 3.4 μg/m3 (15) 28.0
 
July 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A N/A 3.5 μg/m3 (15) 27.0
 
July 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A N/A 3.5 μg/m3 (15) 24.0
 
July 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 3.2 μg/m3 (14) 18.0
 
July 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A N/A 3.2 μg/m3 (14) 16.0
 
July 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 3.0 μg/m3 (13) 13.0
 
July 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 2.6 μg/m3 (11) 12.0
 
July 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A N/A 2.4 μg/m3 (10) 10.0
 
July 17, 2021, noon N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A N/A 2.4 μg/m3 (10) 10.0
 
July 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A N/A 2.2 μg/m3 (10) 10.0
 
July 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 2.1 μg/m3 (9) 12.0
 
July 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A N/A 2.3 μg/m3 (10) 12.0
 
July 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A N/A 2.2 μg/m3 (10) 13.0
 
July 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.2 μg/m3 (10) 15.0
 
July 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A 2.3 μg/m3 (10) 15.0
 
July 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 2.2 μg/m3 (10) 17.0
 
July 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A N/A 2.4 μg/m3 (10) 17.0
 
July 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.1 μg/m3 (9) 18.0
 
July 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A N/A 2.2 μg/m3 (10) 18.0
 
July 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A N/A 2.7 μg/m3 (12) 22.0