ID: 2918

AQSQID: 381010003

Site Name: Ryder

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

Updated: May 11, 2021, 4:48 p.m.

Location: Ryder (184th St Swest), ND

Reporting: True, Located: True

Current AQI: 37.0

Ryder (184th St Swest) ND, US: 47.940861, -101.571583

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 11, 2021, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 7.8 μg/m3 (33) 37.0
 
May 11, 2021, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 6.5 μg/m3 (28) 32.0
 
May 11, 2021, noon 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
May 11, 2021, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.1 μg/m3 (22) 33.0
 
May 11, 2021, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 5.3 μg/m3 (23) 34.0
 
May 11, 2021, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
May 11, 2021, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 6.1 μg/m3 (26) 29.0
 
May 11, 2021, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 5.7 μg/m3 (24) 31.0
 
May 11, 2021, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.3 μg/m3 (23) 33.0
 
May 11, 2021, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 10.2 μg/m3 (43) 43.0
 
May 11, 2021, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 10.4 μg/m3 (44) 44.0
 
May 11, 2021, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 14.3 μg/m3 (56) 56.0
 
May 11, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.4 μg/m3 (27) 31.0
 
May 11, 2021, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.1 μg/m3 (26) 31.0
 
May 11, 2021, midnight 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 4.5 μg/m3 (19) 38.0
 
May 10, 2021, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 4.8 μg/m3 (20) 39.0
 
May 10, 2021, 10 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 4.9 μg/m3 (21) 39.0
 
May 10, 2021, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 4.6 μg/m3 (20) 38.0
 
May 10, 2021, 8 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 4.8 μg/m3 (20) 39.0
 
May 10, 2021, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 5.7 μg/m3 (24) 39.0
 
May 10, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
May 10, 2021, 5 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 4.6 μg/m3 (20) 38.0
 
May 10, 2021, 4 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.1 μg/m3 (18) 35.0
 
May 10, 2021, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 3.8 μg/m3 (16) 33.0
 
May 10, 2021, 2 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 3.7 μg/m3 (16) 29.0
 
May 10, 2021, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 3.9 μg/m3 (17) 25.0
 
May 10, 2021, noon 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 3.8 μg/m3 (16) 23.0
 
May 10, 2021, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 3.7 μg/m3 (16) 25.0
 
May 10, 2021, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 3.7 μg/m3 (16) 25.0
 
May 10, 2021, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 3.6 μg/m3 (16) 26.0
 
May 10, 2021, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 3.7 μg/m3 (16) 27.0
 
May 10, 2021, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 3.7 μg/m3 (16) 28.0
 
May 10, 2021, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 3.8 μg/m3 (16) 29.0
 
May 10, 2021, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 4.8 μg/m3 (20) 30.0
 
May 10, 2021, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 5.3 μg/m3 (23) 30.0
 
May 10, 2021, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 5.1 μg/m3 (22) 31.0
 
May 10, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 5.1 μg/m3 (22) 35.0
 
May 10, 2021, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.2 μg/m3 (22) 38.0
 
May 10, 2021, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 4.8 μg/m3 (20) 43.0
 
May 9, 2021, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 4.6 μg/m3 (20) 42.0
 
May 9, 2021, 10 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 5.1 μg/m3 (22) 40.0
 
May 9, 2021, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 10.3 μg/m3 (43) 43.0
 
May 9, 2021, 8 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 8.6 μg/m3 (36) 40.0
 
May 9, 2021, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 22.5 μg/m3 (73) 73.0
 
May 9, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 22.0 μg/m3 (72) 72.0
 
May 9, 2021, 5 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 16.1 μg/m3 (60) 60.0
 
May 9, 2021, 4 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.5 μg/m3 (15) 38.0
 
May 9, 2021, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
May 9, 2021, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 4.7 μg/m3 (20) 30.0
 
May 9, 2021, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 5.1 μg/m3 (22) 26.0
 
May 9, 2021, noon 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 5.9 μg/m3 (25) 25.0
 
May 9, 2021, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 6.4 μg/m3 (27) 27.0
 
May 9, 2021, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 9, 2021, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
May 9, 2021, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 5.3 μg/m3 (23) 26.0
 
May 9, 2021, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 5.3 μg/m3 (23) 24.0
 
May 9, 2021, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 4.9 μg/m3 (21) 24.0
 
May 9, 2021, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 5.3 μg/m3 (23) 24.0
 
May 9, 2021, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 5.3 μg/m3 (23) 23.0
 
May 9, 2021, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 6.3 μg/m3 (27) 27.0
 
May 9, 2021, 2 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 9.9 μg/m3 (42) 42.0
 
May 9, 2021, 1 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 7.0 μg/m3 (30) 30.0
 
May 9, 2021, midnight 9.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 9.1 μg/m3 (38) 38.0
 
May 8, 2021, 11 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
May 8, 2021, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 3.8 μg/m3 (16) 32.0
 
May 8, 2021, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 6.3 μg/m3 (27) 33.0
 
May 8, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 3.6 μg/m3 (16) 33.0
 
May 8, 2021, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 3.7 μg/m3 (16) 32.0
 
May 8, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 3.8 μg/m3 (16) 30.0
 
May 8, 2021, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 3.9 μg/m3 (17) 29.0
 
May 8, 2021, 4 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 4.4 μg/m3 (19) 28.0
 
May 8, 2021, 3 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
May 8, 2021, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
May 8, 2021, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 6.2 μg/m3 (26) 29.0
 
May 8, 2021, noon 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 5.9 μg/m3 (25) 26.0
 
May 8, 2021, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 5.5 μg/m3 (23) 24.0
 
May 8, 2021, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 5.0 μg/m3 (21) 26.0
 
May 8, 2021, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.2 μg/m3 (18) 35.0
 
May 8, 2021, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.2 μg/m3 (18) 35.0
 
May 8, 2021, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 4.5 μg/m3 (19) 36.0
 
May 8, 2021, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 5.0 μg/m3 (21) 34.0
 
May 8, 2021, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
May 8, 2021, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.3 μg/m3 (27) 31.0
 
May 8, 2021, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
May 8, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.5 μg/m3 (23) 33.0
 
May 8, 2021, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 3.7 μg/m3 (16) 36.0
 
May 8, 2021, midnight 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.1 μg/m3 (13) 38.0
 
May 7, 2021, 11 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
May 7, 2021, 10 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 2.8 μg/m3 (12) 38.0
 
May 7, 2021, 9 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 2.8 μg/m3 (12) 38.0
 
May 7, 2021, 8 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
May 7, 2021, 7 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 3.2 μg/m3 (14) 37.0
 
May 7, 2021, 6 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 3.4 μg/m3 (15) 37.0
 
May 7, 2021, 5 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
May 7, 2021, 4 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 2.3 μg/m3 (10) 36.0
 
May 7, 2021, 3 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 1.9 μg/m3 (8) 35.0
 
May 7, 2021, 2 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 2.0 μg/m3 (9) 33.0
 
May 7, 2021, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 2.6 μg/m3 (11) 29.0
 
May 7, 2021, noon 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 3.3 μg/m3 (14) 24.0
 
May 7, 2021, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 3.0 μg/m3 (13) 23.0
 
May 7, 2021, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
May 7, 2021, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 3.3 μg/m3 (14) 24.0
 
May 7, 2021, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 3.6 μg/m3 (16) 23.0
 
May 7, 2021, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 4.0 μg/m3 (17) 24.0
 
May 7, 2021, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 4.3 μg/m3 (18) 25.0
 
May 7, 2021, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 4.7 μg/m3 (20) 27.0
 
May 7, 2021, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 4.5 μg/m3 (19) 28.0
 
May 7, 2021, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 4.3 μg/m3 (18) 28.0
 
May 7, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 4.1 μg/m3 (18) 31.0
 
May 7, 2021, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.1 μg/m3 (18) 35.0
 
May 7, 2021, midnight 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 4.3 μg/m3 (18) 36.0
 
May 6, 2021, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 4.4 μg/m3 (19) 38.0
 
May 6, 2021, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 4.7 μg/m3 (20) 37.0
 
May 6, 2021, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.3 μg/m3 (23) 38.0
 
May 6, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 5.2 μg/m3 (22) 39.0
 
May 6, 2021, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 4.6 μg/m3 (20) 38.0
 
May 6, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 4.9 μg/m3 (21) 38.0
 
May 6, 2021, 5 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 5.1 μg/m3 (22) 39.0
 
May 6, 2021, 4 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.8 μg/m3 (25) 38.0
 
May 6, 2021, 3 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 7.2 μg/m3 (31) 36.0
 
May 6, 2021, 2 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) 34.0 ppb (32) N/A N/A 7.7 μg/m3 (33) 33.0
 
May 6, 2021, 1 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 6, 2021, noon 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 7.8 μg/m3 (33) 33.0
 
May 6, 2021, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 6, 2021, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 6.4 μg/m3 (27) 27.0
 
May 6, 2021, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 6.4 μg/m3 (27) 27.0
 
May 6, 2021, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 6.3 μg/m3 (27) 29.0
 
May 6, 2021, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 6.2 μg/m3 (26) 26.0
 
May 6, 2021, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 6.2 μg/m3 (26) 28.0
 
May 6, 2021, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 5.4 μg/m3 (23) 32.0
 
May 6, 2021, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 5.6 μg/m3 (24) 32.0
 
May 6, 2021, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 5.6 μg/m3 (24) 31.0
 
May 6, 2021, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 5.4 μg/m3 (23) 30.0
 
May 6, 2021, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 5.3 μg/m3 (23) 36.0
 
May 6, 2021, midnight 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 7.2 μg/m3 (31) 38.0
 
May 5, 2021, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 7.1 μg/m3 (30) 40.0
 
May 5, 2021, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 9.1 μg/m3 (38) 39.0
 
May 5, 2021, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 9.4 μg/m3 (40) 40.0
 
May 5, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 8.3 μg/m3 (35) 38.0
 
May 5, 2021, 7 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 7.9 μg/m3 (33) 36.0
 
May 5, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 9.9 μg/m3 (42) 42.0
 
May 5, 2021, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 5, 2021, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 9.2 μg/m3 (39) 39.0
 
May 5, 2021, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 9.9 μg/m3 (42) 42.0
 
May 5, 2021, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 11.0 μg/m3 (46) 46.0
 
May 5, 2021, 1 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 8.5 μg/m3 (36) 36.0
 
May 5, 2021, noon 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 6.6 μg/m3 (28) 28.0
 
May 5, 2021, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 5.6 μg/m3 (24) 24.0
 
May 5, 2021, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 5.2 μg/m3 (22) 27.0
 
May 5, 2021, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 4.8 μg/m3 (20) 26.0
 
May 5, 2021, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 4.9 μg/m3 (21) 28.0
 
May 5, 2021, 7 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 4.7 μg/m3 (20) 29.0
 
May 5, 2021, 6 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 5.5 μg/m3 (23) 31.0
 
May 5, 2021, 5 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 5.4 μg/m3 (23) 32.0
 
May 5, 2021, 4 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
May 5, 2021, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 4.7 μg/m3 (20) 31.0
 
May 5, 2021, 2 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 4.3 μg/m3 (18) 34.0
 
May 5, 2021, 1 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 3.8 μg/m3 (16) 31.0
 
May 5, 2021, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 3.4 μg/m3 (15) 34.0
 
May 4, 2021, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 3.2 μg/m3 (14) 34.0
 
May 4, 2021, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 3.3 μg/m3 (14) 34.0
 
May 4, 2021, 9 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 3.8 μg/m3 (16) 34.0
 
May 4, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 5.9 μg/m3 (25) 33.0
 
May 4, 2021, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 6.8 μg/m3 (29) 33.0
 
May 4, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 5.8 μg/m3 (25) 32.0
 
May 4, 2021, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
May 4, 2021, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 4.4 μg/m3 (19) 30.0
 
May 4, 2021, 3 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0