ID: 2435

AQSQID: 300870001

Site Name: Birney

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

Updated: Sept. 28, 2021, 9:01 p.m.

Location: Birney (Tongue Riv Rd), MT

Reporting: True, Located: True

Current AQI: 48.0

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
Sept. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (24) 11.3 μg/m3 (48) 48.0
 
Sept. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (20) 8.3 μg/m3 (35) 35.0
 
Sept. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 24.0 μg/m3 (23) 6.6 μg/m3 (28) 28.0
 
Sept. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 2.8 μg/m3 (12) 18.0
 
Sept. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (26) 2.6 μg/m3 (11) 26.0
 
Sept. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 28.0 μg/m3 (26) 7.0 μg/m3 (30) 30.0
 
Sept. 28, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 13.0 μg/m3 (13) 8.7 μg/m3 (37) 37.0
 
Sept. 28, 2021, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 14.0 μg/m3 (13) 9.4 μg/m3 (40) 40.0
 
Sept. 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 13.0 μg/m3 (13) 6.6 μg/m3 (28) 28.0
 
Sept. 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 16.0 μg/m3 (15) 10.7 μg/m3 (45) 45.0
 
Sept. 28, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 15.0 μg/m3 (14) 8.3 μg/m3 (35) 35.0
 
Sept. 28, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 16.0 μg/m3 (15) 9.3 μg/m3 (39) 39.0
 
Sept. 28, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 12.0 μg/m3 (12) 7.6 μg/m3 (32) 32.0
 
Sept. 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 25.0 μg/m3 (24) 9.3 μg/m3 (39) 39.0
 
Sept. 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 24.0 μg/m3 (23) 14.0 μg/m3 (55) 55.0
 
Sept. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 31.0 μg/m3 (29) 11.1 μg/m3 (47) 47.0
 
Sept. 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 75.0 μg/m3 (61) 23.8 μg/m3 (76) 76.0
 
Sept. 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 132.0 μg/m3 (90) 33.7 μg/m3 (97) 97.0
 
Sept. 28, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 45.0 μg/m3 (125) 125.0
 
Sept. 28, 2021, midnight N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 33.5 μg/m3 (97) 97.0
 
Sept. 27, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 16.0 μg/m3 (15) 16.4 μg/m3 (61) 61.0
 
Sept. 27, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 16.0 μg/m3 (15) 7.9 μg/m3 (33) 50.0
 
Sept. 27, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 19.0 μg/m3 (18) 11.1 μg/m3 (47) 50.0
 
Sept. 27, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A 18.0 μg/m3 (17) 12.1 μg/m3 (51) 51.0
 
Sept. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A 16.0 μg/m3 (15) 9.6 μg/m3 (40) 49.0
 
Sept. 27, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A 12.0 μg/m3 (12) 4.5 μg/m3 (19) 47.0
 
Sept. 27, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 17.0 μg/m3 (16) 5.5 μg/m3 (23) 36.0
 
Sept. 27, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 22.0 μg/m3 (21) 6.3 μg/m3 (27) 28.0
 
Sept. 27, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 23.0 μg/m3 (22) 4.9 μg/m3 (21) 23.0
 
Sept. 27, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 19.0 μg/m3 (18) 7.4 μg/m3 (31) 31.0
 
Sept. 27, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 14.0 μg/m3 (13) 8.7 μg/m3 (37) 37.0
 
Sept. 27, 2021, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 20.0 μg/m3 (19) 6.9 μg/m3 (29) 29.0
 
Sept. 27, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 40.0 μg/m3 (38) 9.4 μg/m3 (40) 40.0
 
Sept. 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 11.0 μg/m3 (11) 3.7 μg/m3 (16) 17.0
 
Sept. 27, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Sept. 27, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 20.0 μg/m3 (19) 6.5 μg/m3 (28) 28.0
 
Sept. 27, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 20.0 μg/m3 (19) 2.9 μg/m3 (13) 20.0
 
Sept. 27, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 10.0 μg/m3 (10) 2.3 μg/m3 (10) 24.0
 
Sept. 27, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 15.0 μg/m3 (14) 5.3 μg/m3 (23) 23.0
 
Sept. 27, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 16.0 μg/m3 (15) 4.6 μg/m3 (20) 21.0
 
Sept. 27, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 17.0 μg/m3 (16) 4.8 μg/m3 (20) 24.0
 
Sept. 27, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 18.0 μg/m3 (17) 12.4 μg/m3 (52) 52.0
 
Sept. 27, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 20.0 μg/m3 (19) 11.8 μg/m3 (50) 50.0
 
Sept. 27, 2021, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 15.0 μg/m3 (14) 9.1 μg/m3 (38) 38.0
 
Sept. 26, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 16.0 μg/m3 (15) 14.2 μg/m3 (56) 56.0
 
Sept. 26, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 18.0 μg/m3 (17) 7.0 μg/m3 (30) 40.0
 
Sept. 26, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 60.0 μg/m3 (54) 15.0 μg/m3 (58) 58.0
 
Sept. 26, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 58.0 μg/m3 (53) 14.2 μg/m3 (56) 56.0
 
Sept. 26, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 55.0 μg/m3 (51) 16.9 μg/m3 (62) 62.0
 
Sept. 26, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 25.0 μg/m3 (24) 7.4 μg/m3 (31) 38.0
 
Sept. 26, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 29.0 μg/m3 (27) 6.4 μg/m3 (27) 33.0
 
Sept. 26, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 24.0 μg/m3 (23) 8.6 μg/m3 (36) 36.0
 
Sept. 26, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 18.0 μg/m3 (17) 3.8 μg/m3 (16) 26.0
 
Sept. 26, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 29.0 μg/m3 (27) 5.9 μg/m3 (25) 27.0
 
Sept. 26, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 29.0 μg/m3 (27) 7.8 μg/m3 (33) 33.0
 
Sept. 26, 2021, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 17.0 μg/m3 (16) 4.1 μg/m3 (18) 20.0
 
Sept. 26, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 9.0 μg/m3 (9) 4.7 μg/m3 (20) 20.0
 
Sept. 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 8.0 μg/m3 (8) 6.4 μg/m3 (27) 27.0
 
Sept. 26, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 12.0 μg/m3 (12) 5.5 μg/m3 (23) 23.0
 
Sept. 26, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 27.0 μg/m3 (25) 7.2 μg/m3 (31) 31.0
 
Sept. 26, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 36.0 μg/m3 (34) 12.0 μg/m3 (50) 50.0
 
Sept. 26, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 14.0 μg/m3 (13) 6.3 μg/m3 (27) 27.0
 
Sept. 26, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 30.0 μg/m3 (28) 6.8 μg/m3 (29) 29.0
 
Sept. 26, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 101.0 μg/m3 (74) 23.2 μg/m3 (75) 75.0
 
Sept. 26, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 226.0 μg/m3 (137) 47.0 μg/m3 (130) 137.0
 
Sept. 26, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 253.0 μg/m3 (150) 52.4 μg/m3 (143) 150.0
 
Sept. 26, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 121.0 μg/m3 (84) 31.9 μg/m3 (93) 93.0
 
Sept. 26, 2021, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 39.0 μg/m3 (37) 9.8 μg/m3 (41) 41.0
 
Sept. 25, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 26.0 μg/m3 (25) 4.9 μg/m3 (21) 37.0
 
Sept. 25, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 11.0 μg/m3 (11) 0.5 μg/m3 (3) 37.0
 
Sept. 25, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 29.0 μg/m3 (27) 9.2 μg/m3 (39) 39.0
 
Sept. 25, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 25.0 μg/m3 (24) 6.9 μg/m3 (29) 38.0
 
Sept. 25, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 15.0 μg/m3 (14) 0.9 μg/m3 (4) 38.0
 
Sept. 25, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 10.0 μg/m3 (10) -0.1 μg/m3 (0) 33.0
 
Sept. 25, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 33.0 μg/m3 (31) 7.2 μg/m3 (31) 31.0
 
Sept. 25, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 26.0 μg/m3 (25) 7.9 μg/m3 (33) 33.0
 
Sept. 25, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 19.0 μg/m3 (18) 4.8 μg/m3 (20) 20.0
 
Sept. 25, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 6.0 μg/m3 (6) 3.2 μg/m3 (14) 21.0
 
Sept. 25, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 9.0 μg/m3 (9) -0.5 μg/m3 (0) 19.0
 
Sept. 25, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 10.0 μg/m3 (10) 4.1 μg/m3 (18) 18.0
 
Sept. 25, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 22.0
 
Sept. 25, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 13.0 μg/m3 (13) 4.6 μg/m3 (20) 20.0
 
Sept. 25, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 2.9 μg/m3 (13) 17.0
 
Sept. 25, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 3.0 μg/m3 (3) 3.4 μg/m3 (15) 18.0
 
Sept. 25, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 0.0 μg/m3 (0) 7.7 μg/m3 (33) 33.0
 
Sept. 25, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 10.0 μg/m3 (10) 2.8 μg/m3 (12) 20.0
 
Sept. 25, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 45.0 μg/m3 (42) 8.9 μg/m3 (38) 42.0
 
Sept. 25, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 182.0 μg/m3 (115) 31.6 μg/m3 (93) 115.0
 
Sept. 25, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A 52.6 μg/m3 (144) 144.0
 
Sept. 25, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 107.0 μg/m3 (77) 23.2 μg/m3 (75) 77.0
 
Sept. 25, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 27.0 μg/m3 (25) 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A -1.0 μg/m3 (0) 7.0 μg/m3 (30) 37.0
 
Sept. 24, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A -1.5 μg/m3 (0) 38.0
 
Sept. 24, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 6.0 μg/m3 (6) 2.8 μg/m3 (12) 38.0
 
Sept. 24, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 10.0 μg/m3 (10) 4.1 μg/m3 (18) 38.0
 
Sept. 24, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 12.0 μg/m3 (12) 4.9 μg/m3 (21) 37.0
 
Sept. 24, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 48.0 μg/m3 (45) 9.0 μg/m3 (38) 45.0
 
Sept. 24, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 44.0 μg/m3 (41) 7.4 μg/m3 (31) 41.0
 
Sept. 24, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 22.0 μg/m3 (21) 2.1 μg/m3 (9) 30.0
 
Sept. 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 19.0 μg/m3 (18) 4.6 μg/m3 (20) 26.0
 
Sept. 24, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 18.0 μg/m3 (17) 5.3 μg/m3 (23) 23.0
 
Sept. 24, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 73.0 μg/m3 (60) 6.7 μg/m3 (28) 60.0
 
Sept. 24, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 120.0 μg/m3 (84) 13.3 μg/m3 (54) 84.0
 
Sept. 24, 2021, noon N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 34.0 μg/m3 (32) 4.7 μg/m3 (20) 32.0
 
Sept. 24, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 24.0 μg/m3 (23) 4.3 μg/m3 (18) 23.0
 
Sept. 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 10.0 μg/m3 (10) 5.5 μg/m3 (23) 23.0
 
Sept. 24, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 11.0 μg/m3 (11) 4.5 μg/m3 (19) 19.0
 
Sept. 24, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 14.0 μg/m3 (13) 1.9 μg/m3 (8) 15.0
 
Sept. 24, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 9.0 μg/m3 (9) -3.3 μg/m3 (0) 20.0
 
Sept. 24, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 12.0 μg/m3 (12) 3.3 μg/m3 (14) 21.0
 
Sept. 24, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 17.0 μg/m3 (16) 6.9 μg/m3 (29) 29.0
 
Sept. 24, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 27.0 μg/m3 (25) 2.4 μg/m3 (10) 27.0
 
Sept. 24, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 31.0 μg/m3 (29) 9.0 μg/m3 (38) 38.0
 
Sept. 24, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 61.0 μg/m3 (54) 9.7 μg/m3 (41) 54.0
 
Sept. 24, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 25.0 μg/m3 (24) 9.1 μg/m3 (38) 38.0
 
Sept. 24, 2021, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 17.0 μg/m3 (16) 6.2 μg/m3 (26) 32.0
 
Sept. 23, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 7.0 μg/m3 (7) 4.1 μg/m3 (18) 35.0
 
Sept. 23, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 9.0 μg/m3 (9) 4.6 μg/m3 (20) 37.0
 
Sept. 23, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 10.0 μg/m3 (10) 0.6 μg/m3 (3) 38.0
 
Sept. 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 9.0 μg/m3 (9) 6.3 μg/m3 (27) 38.0
 
Sept. 23, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 12.0 μg/m3 (12) 2.0 μg/m3 (9) 38.0
 
Sept. 23, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 11.0 μg/m3 (11) 1.2 μg/m3 (5) 38.0
 
Sept. 23, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 7.0 μg/m3 (7) 9.5 μg/m3 (40) 40.0
 
Sept. 23, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 13.0 μg/m3 (13) 3.7 μg/m3 (16) 36.0
 
Sept. 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 10.0 μg/m3 (10) -4.8 μg/m3 (0) 24.0
 
Sept. 23, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 15.0 μg/m3 (14) -0.3 μg/m3 (0) 17.0
 
Sept. 23, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 53.0 μg/m3 (50) 3.3 μg/m3 (14) 50.0
 
Sept. 23, 2021, noon N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 45.0 μg/m3 (42) 6.5 μg/m3 (28) 42.0
 
Sept. 23, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 10.0 μg/m3 (10) 0.8 μg/m3 (4) 11.0
 
Sept. 23, 2021, 10 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) 5.0 μg/m3 (21) 21.0
 
Sept. 23, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 8.0 μg/m3 (8) 2.5 μg/m3 (11) 16.0
 
Sept. 23, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 13.0 μg/m3 (13) 9.2 μg/m3 (39) 39.0
 
Sept. 23, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 16.0 μg/m3 (15) 14.6 μg/m3 (57) 57.0
 
Sept. 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 7.0 μg/m3 (7) -1.5 μg/m3 (0) 15.0
 
Sept. 23, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 13.0 μg/m3 (13) 2.4 μg/m3 (10) 16.0
 
Sept. 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 27.0 μg/m3 (25) 2.4 μg/m3 (10) 25.0
 
Sept. 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 43.0 μg/m3 (40) 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 43.0 μg/m3 (40) 6.8 μg/m3 (29) 40.0
 
Sept. 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 18.0 μg/m3 (17) 4.6 μg/m3 (20) 26.0
 
Sept. 23, 2021, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 12.0 μg/m3 (12) 4.1 μg/m3 (18) 30.0
 
Sept. 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 21.0 μg/m3 (20) 3.4 μg/m3 (15) 38.0
 
Sept. 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 17.0 μg/m3 (16) 5.2 μg/m3 (22) 38.0
 
Sept. 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 37.0 μg/m3 (35) 4.4 μg/m3 (19) 38.0
 
Sept. 22, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A 30.0 μg/m3 (28) 8.2 μg/m3 (35) 38.0
 
Sept. 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 32.0 μg/m3 (30) 4.7 μg/m3 (20) 37.0
 
Sept. 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A 4.0 μg/m3 (4) -1.4 μg/m3 (0) 33.0
 
Sept. 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 3.0 μg/m3 (3) 0.5 μg/m3 (3) 28.0
 
Sept. 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 1.0 μg/m3 (1) -3.3 μg/m3 (0) 28.0
 
Sept. 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 12.0 μg/m3 (12) -3.7 μg/m3 (0) 22.0
 
Sept. 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 22.0 μg/m3 (21) 1.0 μg/m3 (5) 21.0
 
Sept. 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 6.0 μg/m3 (6) -0.1 μg/m3 (0) 17.0
 
Sept. 22, 2021, noon N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 4.0 μg/m3 (4) 2.6 μg/m3 (11) 17.0
 
Sept. 22, 2021, 11 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) 2.3 μg/m3 (10) 18.0
 
Sept. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 5.0 μg/m3 (5) 1.4 μg/m3 (6) 18.0
 
Sept. 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 4.0 μg/m3 (4) 3.2 μg/m3 (14) 18.0
 
Sept. 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 2.0 μg/m3 (2) -2.3 μg/m3 (0) 19.0
 
Sept. 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A -3.0 μg/m3 (0) 1.0 μg/m3 (5) 20.0
 
Sept. 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 1.0 μg/m3 (1) 2.2 μg/m3 (10) 22.0
 
Sept. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 7.0 μg/m3 (7) 0.7 μg/m3 (3) 22.0
 
Sept. 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 14.0 μg/m3 (13) -0.9 μg/m3 (0) 20.0
 
Sept. 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 36.0 μg/m3 (34) 10.9 μg/m3 (46) 46.0
 
Sept. 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 44.0 μg/m3 (41) 5.3 μg/m3 (23) 41.0
 
Sept. 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 42.0 μg/m3 (39) 11.5 μg/m3 (48) 48.0
 
Sept. 22, 2021, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A 33.0 μg/m3 (31) 7.8 μg/m3 (33) 37.0
 
Sept. 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 41.0 μg/m3 (38) 6.5 μg/m3 (28) 40.0
 
Sept. 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 14.0 μg/m3 (13) 1.4 μg/m3 (6) 40.0
 
Sept. 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A 4.0 μg/m3 (4) -0.6 μg/m3 (0) 39.0
 
Sept. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (9) 38.0