ID: 7708

AQSQID: 840380250004

Site Name: Lake Ilo

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

Updated: Sept. 22, 2021, 5:01 p.m.

Location: Dunn Center (5th St Swest), ND

Reporting: True, Located: True

Current AQI: 13.0

Dunn Center (5th St Swest) ND, US: 47.342589, -102.645997

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 22, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 13.0
 
Sept. 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A N/A N/A 21.0
 
Sept. 22, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (9) 24.0
 
Sept. 22, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (9) 25.0
 
Sept. 22, 2021, 10 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (9) 25.0
 
Sept. 22, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 23.0
 
Sept. 22, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 23.0
 
Sept. 22, 2021, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (23) N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 23.0
 
Sept. 22, 2021, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (24) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 24.0
 
Sept. 22, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A 6.0 μg/m3 (6) 3.0 μg/m3 (13) 25.0
 
Sept. 22, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 27.0
 
Sept. 22, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A 12.0 μg/m3 (12) 3.0 μg/m3 (13) 29.0
 
Sept. 22, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 31.0 ppb (29) N/A 56.0 μg/m3 (52) 3.0 μg/m3 (13) 52.0
 
Sept. 22, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 1.0 μg/m3 (5) 30.0
 
Sept. 22, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 1.0 μg/m3 (5) 33.0
 
Sept. 21, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (5) 38.0
 
Sept. 21, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (9) 39.0
 
Sept. 21, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 39.0
 
Sept. 21, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 38.0
 
Sept. 21, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) N/A 8.0 μg/m3 (8) 1.0 μg/m3 (5) 37.0
 
Sept. 21, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 35.0
 
Sept. 21, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 29.0
 
Sept. 21, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A 8.0 μg/m3 (8) 2.0 μg/m3 (9) 24.0
 
Sept. 21, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (18) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 18.0
 
Sept. 21, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (18) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 18.0
 
Sept. 21, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 20.0 ppb (19) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (9) 19.0
 
Sept. 21, 2021, 10 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 18.0 ppb (17) N/A 2.0 μg/m3 (2) 2.0 μg/m3 (9) 17.0
 
Sept. 21, 2021, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 19.0 ppb (18) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (9) 18.0
 
Sept. 21, 2021, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 18.0 ppb (17) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 17.0
 
Sept. 21, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 19.0 ppb (18) N/A 3.0 μg/m3 (3) 2.0 μg/m3 (9) 18.0
 
Sept. 21, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 19.0
 
Sept. 21, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 23.0
 
Sept. 21, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 25.0
 
Sept. 21, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 27.0
 
Sept. 21, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (13) 27.0
 
Sept. 21, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 31.0
 
Sept. 21, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 35.0
 
Sept. 20, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 8.0 μg/m3 (8) 2.0 μg/m3 (9) 36.0
 
Sept. 20, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 38.0
 
Sept. 20, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 18.0 μg/m3 (17) 2.0 μg/m3 (9) 39.0
 
Sept. 20, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 40.0
 
Sept. 20, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A 10.0 μg/m3 (10) 1.0 μg/m3 (5) 40.0
 
Sept. 20, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 7.0 μg/m3 (7) 1.0 μg/m3 (5) 39.0
 
Sept. 20, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A 8.0 μg/m3 (8) 1.0 μg/m3 (5) 38.0
 
Sept. 20, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (13) 35.0
 
Sept. 20, 2021, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 34.0 ppb (32) N/A 16.0 μg/m3 (15) 4.0 μg/m3 (17) 32.0
 
Sept. 20, 2021, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (22) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (17) N/A 7.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (18) N/A 6.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (17) N/A 10.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 10 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (20) N/A 13.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) N/A 12.0 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (22) N/A 8.0 μg/m3 (8) 7.0 μg/m3 (30) 30.0
 
Sept. 20, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A 8.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 27.0 ppb (25) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 25.0
 
Sept. 20, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 26.0 ppb (25) N/A 0.0 μg/m3 (0) 5.0 μg/m3 (21) 25.0
 
Sept. 20, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A 3.0 μg/m3 (3) 4.0 μg/m3 (17) 31.0
 
Sept. 20, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 34.0
 
Sept. 20, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) N/A 11.0 μg/m3 (11) 4.0 μg/m3 (17) 34.0
 
Sept. 20, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (41) N/A 20.0 μg/m3 (19) 4.0 μg/m3 (17) 41.0
 
Sept. 20, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A 29.0 μg/m3 (27) 7.0 μg/m3 (30) 43.0
 
Sept. 19, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) N/A 16.0 μg/m3 (15) 5.0 μg/m3 (21) 43.0
 
Sept. 19, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) N/A 18.0 μg/m3 (17) 5.0 μg/m3 (21) 44.0
 
Sept. 19, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A 14.0 μg/m3 (13) 5.0 μg/m3 (21) 45.0
 
Sept. 19, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A 26.0 μg/m3 (25) 7.0 μg/m3 (30) 45.0
 
Sept. 19, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A 15.0 μg/m3 (14) 11.0 μg/m3 (46) 46.0
 
Sept. 19, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A 13.0 μg/m3 (13) 8.0 μg/m3 (34) 47.0
 
Sept. 19, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (47) N/A 8.0 μg/m3 (8) 6.0 μg/m3 (25) 47.0
 
Sept. 19, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 49.0 ppb (46) N/A 11.0 μg/m3 (11) 6.0 μg/m3 (25) 46.0
 
Sept. 19, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (45) N/A 28.0 μg/m3 (26) 7.0 μg/m3 (30) 45.0
 
Sept. 19, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 42.0 ppb (39) N/A 47.0 μg/m3 (44) 22.0 μg/m3 (72) 72.0
 
Sept. 19, 2021, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 31.0 ppb (29) N/A 43.0 μg/m3 (40) 44.0 μg/m3 (122) 122.0
 
Sept. 19, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 33.0 ppb (31) N/A 65.0 μg/m3 (56) 46.0 μg/m3 (127) 127.0
 
Sept. 19, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A 68.0 μg/m3 (58) 44.0 μg/m3 (122) 122.0
 
Sept. 19, 2021, 10 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 18.0 μg/m3 (17) 38.0 μg/m3 (108) 108.0
 
Sept. 19, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A 19.0 μg/m3 (18) 7.0 μg/m3 (30) 33.0
 
Sept. 19, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A 19.0 μg/m3 (18) 7.0 μg/m3 (30) 33.0
 
Sept. 19, 2021, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A 25.0 μg/m3 (24) 13.0 μg/m3 (53) 53.0
 
Sept. 19, 2021, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 22.0 μg/m3 (21) 17.0 μg/m3 (62) 62.0
 
Sept. 19, 2021, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A 20.0 μg/m3 (19) 14.0 μg/m3 (55) 55.0
 
Sept. 19, 2021, 4 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A 20.0 μg/m3 (19) 13.0 μg/m3 (53) 53.0
 
Sept. 19, 2021, 3 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) N/A 28.0 μg/m3 (26) 15.0 μg/m3 (58) 58.0
 
Sept. 19, 2021, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (41) N/A 30.0 μg/m3 (28) 17.0 μg/m3 (62) 62.0
 
Sept. 19, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (43) N/A 22.0 μg/m3 (21) 20.0 μg/m3 (68) 68.0
 
Sept. 19, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (46) N/A 24.0 μg/m3 (23) 24.0 μg/m3 (77) 77.0
 
Sept. 18, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 55.0 ppb (51) N/A 27.0 μg/m3 (25) 24.0 μg/m3 (77) 77.0
 
Sept. 18, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 57.0 ppb (58) N/A 21.0 μg/m3 (20) 22.0 μg/m3 (72) 72.0
 
Sept. 18, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 55.0 ppb (51) N/A 19.0 μg/m3 (18) 16.0 μg/m3 (60) 60.0
 
Sept. 18, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 54.0 ppb (50) N/A 22.0 μg/m3 (21) 15.0 μg/m3 (58) 58.0
 
Sept. 18, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (48) N/A 26.0 μg/m3 (25) 13.0 μg/m3 (53) 53.0
 
Sept. 18, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) N/A 21.0 μg/m3 (20) 12.0 μg/m3 (50) 50.0
 
Sept. 18, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A 22.0 μg/m3 (21) 12.0 μg/m3 (50) 50.0
 
Sept. 18, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) N/A 23.0 μg/m3 (22) 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) N/A 14.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A 10.0 μg/m3 (10) 5.0 μg/m3 (21) 24.0
 
Sept. 18, 2021, 1 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (22) N/A 11.0 μg/m3 (11) 4.0 μg/m3 (17) 22.0
 
Sept. 18, 2021, noon N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (22) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 22.0
 
Sept. 18, 2021, 11 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (23) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 23.0
 
Sept. 18, 2021, 10 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (24) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 24.0
 
Sept. 18, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 26.0 ppb (25) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 25.0
 
Sept. 18, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (26) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 26.0
 
Sept. 18, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (26) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 26.0
 
Sept. 18, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 28.0 ppb (26) N/A 12.0 μg/m3 (12) 3.0 μg/m3 (13) 26.0
 
Sept. 18, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 30.0 ppb (28) N/A 13.0 μg/m3 (13) 3.0 μg/m3 (13) 28.0
 
Sept. 18, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 29.0
 
Sept. 18, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 29.0
 
Sept. 18, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 31.0 ppb (29) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 29.0
 
Sept. 18, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 32.0 ppb (30) N/A 12.0 μg/m3 (12) 3.0 μg/m3 (13) 30.0
 
Sept. 18, 2021, midnight N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A 17.0 μg/m3 (16) 3.0 μg/m3 (13) 32.0
 
Sept. 17, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (34) N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 34.0
 
Sept. 17, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 35.0
 
Sept. 17, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (5) 36.0
 
Sept. 17, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (5) 36.0
 
Sept. 17, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 36.0 ppb (34) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (5) 34.0
 
Sept. 17, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 33.0
 
Sept. 17, 2021, 5 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 35.0 ppb (33) N/A 10.0 μg/m3 (10) 1.0 μg/m3 (5) 33.0
 
Sept. 17, 2021, 4 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 34.0 ppb (32) N/A 14.0 μg/m3 (13) 1.0 μg/m3 (5) 32.0
 
Sept. 17, 2021, 3 p.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 30.0 ppb (28) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 28.0
 
Sept. 17, 2021, 2 p.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 25.0 ppb (24) N/A 7.0 μg/m3 (7) 2.0 μg/m3 (9) 24.0
 
Sept. 17, 2021, 1 p.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 19.0 ppb (18) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (9) 18.0
 
Sept. 17, 2021, noon N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 18.0 ppb (17) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (5) 17.0
 
Sept. 17, 2021, 11 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 18.0 ppb (17) N/A 4.0 μg/m3 (4) 1.0 μg/m3 (5) 17.0
 
Sept. 17, 2021, 10 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 19.0 ppb (18) N/A 5.0 μg/m3 (5) 1.0 μg/m3 (5) 18.0
 
Sept. 17, 2021, 9 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 20.0 ppb (19) N/A 6.0 μg/m3 (6) 1.0 μg/m3 (5) 19.0
 
Sept. 17, 2021, 8 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 19.0 ppb (18) N/A 9.0 μg/m3 (9) 1.0 μg/m3 (5) 18.0
 
Sept. 17, 2021, 7 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 21.0 ppb (20) N/A 2.0 μg/m3 (2) 1.0 μg/m3 (5) 20.0
 
Sept. 17, 2021, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 1.0 μg/m3 (5) 20.0
 
Sept. 17, 2021, 5 a.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 1.0 μg/m3 (5) 21.0
 
Sept. 17, 2021, 4 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 25.0 ppb (24) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 24.0
 
Sept. 17, 2021, 3 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 28.0 ppb (26) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 26.0
 
Sept. 17, 2021, 2 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 31.0 ppb (29) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 29.0
 
Sept. 17, 2021, 1 a.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 33.0 ppb (31) N/A 6.0 μg/m3 (6) 2.0 μg/m3 (9) 31.0
 
Sept. 17, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 33.0
 
Sept. 16, 2021, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 9.0 μg/m3 (9) 3.0 μg/m3 (13) 35.0
 
Sept. 16, 2021, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 12.0 μg/m3 (12) 3.0 μg/m3 (13) 36.0
 
Sept. 16, 2021, 9 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 39.0 ppb (37) N/A 21.0 μg/m3 (20) 3.0 μg/m3 (13) 37.0
 
Sept. 16, 2021, 8 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) N/A 10.0 μg/m3 (10) 3.0 μg/m3 (13) 38.0
 
Sept. 16, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 37.0 ppb (35) N/A 8.0 μg/m3 (8) 3.0 μg/m3 (13) 35.0
 
Sept. 16, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 11.0 μg/m3 (11) 3.0 μg/m3 (13) 36.0
 
Sept. 16, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 13.0 μg/m3 (13) 3.0 μg/m3 (13) 36.0
 
Sept. 16, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A 19.0 μg/m3 (18) 3.0 μg/m3 (13) 29.0
 
Sept. 16, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (30) N/A 30.0 μg/m3 (28) 4.0 μg/m3 (17) 30.0
 
Sept. 16, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 31.0 ppb (29) N/A 21.0 μg/m3 (20) 4.0 μg/m3 (17) 29.0
 
Sept. 16, 2021, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 26.0 ppb (25) N/A 17.0 μg/m3 (16) 5.0 μg/m3 (21) 25.0
 
Sept. 16, 2021, noon N/A N/A N/A 5.0 ppb (5) N/A 1.0 ppb (2) 27.0 ppb (25) N/A 13.0 μg/m3 (13) 5.0 μg/m3 (21) 25.0
 
Sept. 16, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 30.0 ppb (28) N/A 19.0 μg/m3 (18) 5.0 μg/m3 (21) 28.0
 
Sept. 16, 2021, 10 a.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 30.0 ppb (28) N/A 23.0 μg/m3 (22) 5.0 μg/m3 (21) 28.0
 
Sept. 16, 2021, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 29.0 ppb (27) N/A 17.0 μg/m3 (16) 6.0 μg/m3 (25) 27.0
 
Sept. 16, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A 1.0 ppb (2) 25.0 ppb (24) N/A 12.0 μg/m3 (12) 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) N/A 17.0 μg/m3 (16) 6.0 μg/m3 (25) 26.0
 
Sept. 16, 2021, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 28.0
 
Sept. 16, 2021, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) N/A 18.0 μg/m3 (17) 6.0 μg/m3 (25) 34.0
 
Sept. 16, 2021, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 27.0 μg/m3 (25) 6.0 μg/m3 (25) 35.0
 
Sept. 16, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (2) 39.0 ppb (37) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 37.0
 
Sept. 16, 2021, 1 a.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 15.0 μg/m3 (14) 5.0 μg/m3 (21) 39.0
 
Sept. 16, 2021, midnight N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A 22.0 μg/m3 (21) 4.0 μg/m3 (17) 38.0
 
Sept. 15, 2021, 11 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) N/A 10.0 μg/m3 (10) 7.0 μg/m3 (30) 38.0
 
Sept. 15, 2021, 10 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 9.0 μg/m3 (9) 5.0 μg/m3 (21) 39.0
 
Sept. 15, 2021, 9 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 43.0 ppb (40) N/A 6.0 μg/m3 (6) 4.0 μg/m3 (17) 40.0
 
Sept. 15, 2021, 8 p.m. N/A N/A N/A 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) N/A 7.0 μg/m3 (7) 5.0 μg/m3 (21) 42.0
 
Sept. 15, 2021, 7 p.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 47.0 ppb (44) N/A 12.0 μg/m3 (12) 5.0 μg/m3 (21) 44.0
 
Sept. 15, 2021, 6 p.m. N/A N/A N/A 0.0 ppb (0) N/A 1.0 ppb (2) 48.0 ppb (45) N/A 15.0 μg/m3 (14) 8.0 μg/m3 (34) 45.0
 
Sept. 15, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 45.0 ppb (42) N/A 15.0 μg/m3 (14) 8.0 μg/m3 (34) 42.0
 
Sept. 15, 2021, 4 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 41.0 ppb (38) N/A 18.0 μg/m3 (17) 7.0 μg/m3 (30) 38.0
 
Sept. 15, 2021, 3 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 34.0 ppb (32) N/A 16.0 μg/m3 (15) 6.0 μg/m3 (25) 32.0
 
Sept. 15, 2021, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A 1.0 ppb (2) 28.0 ppb (26) N/A 11.0 μg/m3 (11) 6.0 μg/m3 (25) 26.0