ID: 2435

AQSQID: 300870001

Site Name: Birney

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

Updated: Jan. 16, 2022, 10:32 a.m.

Location: Birney (Tongue Riv Rd), MT

Reporting: False, Located: True

Current AQI: None

Birney (Tongue Riv Rd) MT, US: 45.366151, -106.48982

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Nov. 2, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Nov. 2, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Nov. 2, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 15.0
 
Nov. 2, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 10.0
 
Nov. 2, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 0.0 μg/m3 (0) 3.9 μg/m3 (17) 17.0
 
Nov. 2, 2021, noon N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 0.0 μg/m3 (0) 1.3 μg/m3 (6) 8.0
 
Nov. 2, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 0.0 μg/m3 (0) 3.5 μg/m3 (15) 15.0
 
Nov. 2, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 0.0 μg/m3 (0) 2.8 μg/m3 (12) 12.0
 
Nov. 2, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 0.0 μg/m3 (0) 9.3 μg/m3 (39) 39.0
 
Nov. 2, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 0.0 μg/m3 (0) 7.8 μg/m3 (33) 33.0
 
Nov. 2, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 0.0 μg/m3 (0) -1.7 μg/m3 (0) 11.0
 
Nov. 2, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 14.0
 
Nov. 2, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 0.0 μg/m3 (0) -3.8 μg/m3 (0) 12.0
 
Nov. 2, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 14.0
 
Nov. 2, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 0.0 μg/m3 (0) 0.8 μg/m3 (4) 14.0
 
Nov. 2, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 0.0 μg/m3 (0) 3.1 μg/m3 (13) 18.0
 
Nov. 2, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 0.0 μg/m3 (0) 3.8 μg/m3 (16) 23.0
 
Nov. 2, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) 13.3 μg/m3 (54) 54.0
 
Nov. 1, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.0 μg/m3 (0) 18.4 μg/m3 (65) 65.0
 
Nov. 1, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 0.0 μg/m3 (0) 4.6 μg/m3 (20) 35.0
 
Nov. 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) 4.1 μg/m3 (18) 34.0
 
Nov. 1, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) -2.4 μg/m3 (0) 34.0
 
Nov. 1, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 0.0 μg/m3 (0) 2.6 μg/m3 (11) 31.0
 
Nov. 1, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (2) 29.0
 
Nov. 1, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 0.0 μg/m3 (0) -0.6 μg/m3 (0) 27.0
 
Nov. 1, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 0.0 μg/m3 (0) 13.5 μg/m3 (54) 54.0
 
Nov. 1, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 0.0 μg/m3 (0) 10.5 μg/m3 (44) 44.0
 
Nov. 1, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 0.0 μg/m3 (0) 3.0 μg/m3 (13) 13.0
 
Nov. 1, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 0.0 μg/m3 (0) 3.5 μg/m3 (15) 15.0
 
Nov. 1, 2021, noon N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 0.0 μg/m3 (0) 0.8 μg/m3 (4) 9.0
 
Nov. 1, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 0.0 μg/m3 (0) 0.5 μg/m3 (3) 11.0
 
Nov. 1, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 0.0 μg/m3 (0) 3.4 μg/m3 (15) 15.0
 
Nov. 1, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 13.0
 
Nov. 1, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 0.0 μg/m3 (0) 10.1 μg/m3 (43) 43.0
 
Nov. 1, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 0.0 μg/m3 (0) 12.9 μg/m3 (53) 53.0
 
Nov. 1, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 0.0 μg/m3 (0) 0.0 μg/m3 (0) 15.0
 
Nov. 1, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 0.0 μg/m3 (0) 0.7 μg/m3 (3) 20.0
 
Nov. 1, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 0.0 μg/m3 (0) 0.5 μg/m3 (3) 21.0
 
Nov. 1, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 0.0 μg/m3 (0) 4.8 μg/m3 (20) 24.0
 
Nov. 1, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) 3.6 μg/m3 (16) 25.0
 
Nov. 1, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) 9.9 μg/m3 (42) 42.0
 
Nov. 1, 2021, midnight N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 7.1 μg/m3 (30) 30.0
 
Oct. 31, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 29.0
 
Oct. 31, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 0.0 μg/m3 (0) 3.9 μg/m3 (17) 33.0
 
Oct. 31, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) 4.0 μg/m3 (17) 34.0
 
Oct. 31, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) 4.0 μg/m3 (17) 34.0
 
Oct. 31, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 0.0 μg/m3 (0) 2.8 μg/m3 (12) 34.0
 
Oct. 31, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 0.0 μg/m3 (0) 3.3 μg/m3 (14) 33.0
 
Oct. 31, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.0 μg/m3 (0) 5.5 μg/m3 (23) 32.0
 
Oct. 31, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 0.0 μg/m3 (0) 3.9 μg/m3 (17) 30.0
 
Oct. 31, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) 14.0 μg/m3 (55) 55.0
 
Oct. 31, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (2) 18.0
 
Oct. 31, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 0.0 μg/m3 (0) 1.6 μg/m3 (7) 18.0
 
Oct. 31, 2021, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 0.0 μg/m3 (0) 5.5 μg/m3 (23) 23.0
 
Oct. 31, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 0.0 μg/m3 (0) -0.2 μg/m3 (0) 23.0
 
Oct. 31, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) 1.8 μg/m3 (8) 26.0
 
Oct. 31, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 0.0 μg/m3 (0) 2.1 μg/m3 (9) 23.0
 
Oct. 31, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 0.0 μg/m3 (0) 0.3 μg/m3 (2) 26.0
 
Oct. 31, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 0.0 μg/m3 (0) 2.5 μg/m3 (11) 28.0
 
Oct. 31, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 0.0 μg/m3 (0) 3.9 μg/m3 (17) 29.0
 
Oct. 31, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 0.0 μg/m3 (0) 4.7 μg/m3 (20) 27.0
 
Oct. 31, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 0.0 μg/m3 (0) 4.8 μg/m3 (20) 23.0
 
Oct. 31, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 0.0 μg/m3 (0) 6.1 μg/m3 (26) 26.0
 
Oct. 31, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) -0.7 μg/m3 (0) 25.0
 
Oct. 31, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) 2.5 μg/m3 (11) 25.0
 
Oct. 31, 2021, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) 4.0 μg/m3 (17) 25.0
 
Oct. 30, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) -4.4 μg/m3 (0) 25.0
 
Oct. 30, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 0.0 μg/m3 (0) 1.9 μg/m3 (8) 27.0
 
Oct. 30, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 0.0 μg/m3 (0) 0.5 μg/m3 (3) 28.0
 
Oct. 30, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 0.0 μg/m3 (0) -1.0 μg/m3 (0) 27.0
 
Oct. 30, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) 0.9 μg/m3 (4) 25.0
 
Oct. 30, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) 1.5 μg/m3 (7) 25.0
 
Oct. 30, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 0.0 μg/m3 (0) 5.6 μg/m3 (24) 25.0
 
Oct. 30, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 0.0 μg/m3 (0) 7.2 μg/m3 (31) 31.0
 
Oct. 30, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 2.0 μg/m3 (2) 0.8 μg/m3 (4) 26.0
 
Oct. 30, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 0.0 μg/m3 (0) 1.7 μg/m3 (8) 22.0
 
Oct. 30, 2021, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 3.0 μg/m3 (3) 5.8 μg/m3 (25) 25.0
 
Oct. 30, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (9) 30.0
 
Oct. 30, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 3.0 μg/m3 (3) 3.7 μg/m3 (16) 31.0
 
Oct. 30, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 14.0 μg/m3 (13) 3.2 μg/m3 (14) 26.0
 
Oct. 30, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 8.0 μg/m3 (8) 10.8 μg/m3 (46) 46.0
 
Oct. 30, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 6.0 μg/m3 (6) 8.6 μg/m3 (36) 36.0
 
Oct. 30, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 3.0 μg/m3 (3) 0.5 μg/m3 (3) 22.0
 
Oct. 30, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 5.0 μg/m3 (5) 1.5 μg/m3 (7) 13.0
 
Oct. 30, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 2.0 μg/m3 (2) 2.5 μg/m3 (11) 15.0
 
Oct. 30, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 10.0 μg/m3 (10) 1.9 μg/m3 (8) 13.0
 
Oct. 30, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 21.0 μg/m3 (20) 4.8 μg/m3 (20) 20.0
 
Oct. 30, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 13.0 μg/m3 (13) 6.9 μg/m3 (29) 29.0
 
Oct. 30, 2021, midnight N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 18.0 μg/m3 (17) 4.5 μg/m3 (19) 19.0
 
Oct. 29, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 14.0 μg/m3 (13) 8.4 μg/m3 (36) 36.0
 
Oct. 29, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 10.0 μg/m3 (10) 4.0 μg/m3 (17) 20.0
 
Oct. 29, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 13.0 μg/m3 (13) 0.5 μg/m3 (3) 20.0
 
Oct. 29, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 7.0 μg/m3 (7) 2.3 μg/m3 (10) 21.0
 
Oct. 29, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 4.0 μg/m3 (4) 0.8 μg/m3 (4) 20.0
 
Oct. 29, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 7.0 μg/m3 (7) 1.6 μg/m3 (7) 18.0
 
Oct. 29, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 1.0 μg/m3 (1) 2.5 μg/m3 (11) 16.0
 
Oct. 29, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 7.0 μg/m3 (7) 0.7 μg/m3 (3) 14.0
 
Oct. 29, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 3.0 μg/m3 (3) -3.9 μg/m3 (0) 12.0
 
Oct. 29, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (5) 9.0
 
Oct. 29, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 0.0 μg/m3 (0) 4.5 μg/m3 (19) 19.0
 
Oct. 29, 2021, noon N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 0.0 μg/m3 (0) 1.5 μg/m3 (7) 10.0
 
Oct. 29, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 2.0 μg/m3 (2) 2.3 μg/m3 (10) 13.0
 
Oct. 29, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 6.0 μg/m3 (6) 2.5 μg/m3 (11) 13.0
 
Oct. 29, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 1.0 μg/m3 (1) 7.8 μg/m3 (33) 33.0
 
Oct. 29, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A -1.0 μg/m3 (0) 3.4 μg/m3 (15) 15.0
 
Oct. 29, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 2.0 μg/m3 (2) N/A 16.0
 
Oct. 29, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 0.0 μg/m3 (0) 2.9 μg/m3 (13) 18.0
 
Oct. 29, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 4.0 μg/m3 (4) 0.0 μg/m3 (0) 17.0
 
Oct. 29, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 2.0 μg/m3 (2) 1.5 μg/m3 (7) 18.0
 
Oct. 29, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 6.0 μg/m3 (6) 0.3 μg/m3 (2) 21.0
 
Oct. 29, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 16.0 μg/m3 (15) 4.1 μg/m3 (18) 18.0
 
Oct. 29, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 18.0 μg/m3 (17) 2.6 μg/m3 (11) 21.0
 
Oct. 29, 2021, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 16.0 μg/m3 (15) 12.8 μg/m3 (53) 53.0
 
Oct. 28, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 14.0 μg/m3 (13) 9.8 μg/m3 (41) 41.0
 
Oct. 28, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 39.0
 
Oct. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 7.0 μg/m3 (7) 3.8 μg/m3 (16) 40.0
 
Oct. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 7.0 μg/m3 (7) 1.4 μg/m3 (6) 39.0
 
Oct. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 4.0 μg/m3 (4) 6.2 μg/m3 (26) 38.0
 
Oct. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 37.0
 
Oct. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 1.0 μg/m3 (1) 4.6 μg/m3 (20) 33.0
 
Oct. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 9.0 μg/m3 (9) 4.2 μg/m3 (18) 25.0
 
Oct. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 11.0 μg/m3 (11) 9.3 μg/m3 (39) 39.0
 
Oct. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 0.0 μg/m3 (0) -1.2 μg/m3 (0) 15.0
 
Oct. 28, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 2.0 μg/m3 (2) 1.9 μg/m3 (8) 18.0
 
Oct. 28, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 8.0 μg/m3 (8) 1.7 μg/m3 (8) 17.0
 
Oct. 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 1.0 μg/m3 (1) 2.7 μg/m3 (12) 21.0
 
Oct. 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 1.0 μg/m3 (1) 3.0 μg/m3 (13) 25.0
 
Oct. 28, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (19) 30.0
 
Oct. 28, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 6.0 μg/m3 (6) 5.1 μg/m3 (22) 29.0
 
Oct. 28, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 2.0 μg/m3 (2) 9.9 μg/m3 (42) 42.0
 
Oct. 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 2.0 μg/m3 (2) 1.1 μg/m3 (5) 31.0
 
Oct. 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 5.0 μg/m3 (5) 2.1 μg/m3 (9) 31.0
 
Oct. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 11.0 μg/m3 (11) 6.8 μg/m3 (29) 32.0
 
Oct. 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 6.0 μg/m3 (6) 4.3 μg/m3 (18) 33.0
 
Oct. 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 13.0 μg/m3 (13) 4.6 μg/m3 (20) 35.0
 
Oct. 28, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 18.0 μg/m3 (17) 6.7 μg/m3 (28) 36.0
 
Oct. 28, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 20.0 μg/m3 (19) 4.7 μg/m3 (20) 37.0
 
Oct. 27, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 22.0 μg/m3 (21) 0.7 μg/m3 (3) 38.0
 
Oct. 27, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 18.0 μg/m3 (17) 10.7 μg/m3 (45) 45.0
 
Oct. 27, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 4.0 μg/m3 (4) 7.4 μg/m3 (31) 37.0
 
Oct. 27, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A -3.0 μg/m3 (0) -0.1 μg/m3 (0) 38.0
 
Oct. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 6.0 μg/m3 (6) 0.8 μg/m3 (4) 37.0
 
Oct. 27, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A N/A -4.8 μg/m3 (0) 35.0
 
Oct. 27, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 0.0 μg/m3 (0) -0.7 μg/m3 (0) 22.0
 
Oct. 27, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 0.0 μg/m3 (0) 5.5 μg/m3 (23) 23.0
 
Oct. 27, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.9 μg/m3 (38) 38.0
 
Oct. 27, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) 4.9 μg/m3 (21) 21.0
 
Oct. 27, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (1) -1.1 μg/m3 (0) 1.0
 
Oct. 27, 2021, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 0.0 μg/m3 (0) 1.1 μg/m3 (5) 15.0
 
Oct. 27, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 4.0 μg/m3 (4) 4.2 μg/m3 (18) 18.0
 
Oct. 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (19) 19.0
 
Oct. 27, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 0.0 μg/m3 (0) 2.1 μg/m3 (9) 9.0
 
Oct. 27, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 1.0 μg/m3 (1) 15.0 μg/m3 (58) 58.0
 
Oct. 27, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A -1.0 μg/m3 (0) 9.8 μg/m3 (41) 41.0
 
Oct. 27, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 3.0 μg/m3 (3) -2.3 μg/m3 (0) 14.0
 
Oct. 27, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 4.0 μg/m3 (4) 3.6 μg/m3 (16) 16.0
 
Oct. 27, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 6.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
Oct. 27, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 4.0 μg/m3 (4) 7.2 μg/m3 (31) 31.0
 
Oct. 27, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 3.0 μg/m3 (3) -0.2 μg/m3 (0) 20.0
 
Oct. 27, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 4.0 μg/m3 (4) 7.7 μg/m3 (33) 33.0
 
Oct. 27, 2021, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 12.0 μg/m3 (12) 4.5 μg/m3 (19) 27.0
 
Oct. 26, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 5.0 μg/m3 (5) 8.3 μg/m3 (35) 35.0
 
Oct. 26, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.0 μg/m3 (1) 9.7 μg/m3 (41) 41.0
 
Oct. 26, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 7.0 μg/m3 (7) N/A 32.0
 
Oct. 26, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.0 μg/m3 (0) 1.4 μg/m3 (6) 32.0
 
Oct. 26, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 0.0 μg/m3 (0) -1.6 μg/m3 (0) 32.0
 
Oct. 26, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 1.0 μg/m3 (1) 2.6 μg/m3 (11) 33.0
 
Oct. 26, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 1.0 μg/m3 (1) 4.9 μg/m3 (21) 31.0